JP4164159B2

JP4164159B2 - Direct pressure continuous abrasive supply and injection method and apparatus

Info

Publication number: JP4164159B2
Application number: JP16534098A
Authority: JP
Inventors: 恵二間瀬; 真治神田
Original assignee: Fuji Manufacturing Co Ltd
Current assignee: Fuji Manufacturing Co Ltd
Priority date: 1998-06-12
Filing date: 1998-06-12
Publication date: 2008-10-08
Anticipated expiration: 2018-06-12
Also published as: JP2000000768A

Description

【０００１】
【発明の属する技術分野】
ブラスト加工において、研磨材回収タンク内の研磨材を噴射ノズルから被加工物へ定量的に噴射する、すなわち噴射量を一定に維持することは、良好で安定したブラスト加工を行うための重要なブラスト加工条件の１つであり、とくに、近年ブラスト加工が伝統的な単なるスケール除去やバリ取り等以外に数μmから数百μmの微細な切削加工を行う用途が増加している。例えば、半導体、ファインセラミック、ＰＤＰ（プラズマデイスプレイ）その他の薄膜面の微少切削、また、金属部品等の機械加工、レーザー加工、超音波加工に代替するものとして、ブラスト加工による微少切削が行われている。とくにこれらの加工が自動化ラインによって行われる場合には、噴射量の制御は重要な要素となる。
【０００２】
本発明は、かようなニーズに対応するものとして、研磨材タンク内の研磨材を定量的に噴射ノズルへ連続して安定的に供給し、且つ、噴射するための研磨材の直圧式での連続的な供給・噴射方法及び装置に関する。
【０００３】
【従来の技術】
ブラスト装置を噴射方式で分類すると、研磨材を研磨材回収タンク内に入れて該タンク内を圧縮空気で加圧して研磨材を圧送し、ノズルから噴射させる直圧式と、圧縮空気の噴射によるエゼクター効果によるサクション力により研磨材をノズル構造内部に吸い込み、その先端から圧縮空気と共に研磨材を噴射するサクション式に分けられる。
【０００４】
従来の直圧式ブラスト加工装置を示す図８において、研磨材回収タンク４０において、噴射後の研磨材とダストを分離して、ダストはダストコレクタ５３へ送られ、研磨材は下方に落ちて前記研磨材回収タンク４０の下部に溜まる。研磨材回収タンク４０の下部には研磨材加圧タンク４２が設けられ、研磨材加圧タンク４２に研磨材が無くなるとダンプバルブ４１が下がり研磨材回収タンク４０にある研磨材が研磨材加圧タンク４２に入る。研磨材加圧タンク４２に研磨材が入ると研磨材加圧用圧縮空気供給口４４より研磨材加圧用圧縮空気４７が入り、同時にダンプバルブ４１が閉まり研磨材加圧タンク４２内の圧力が高くなり、研磨材供給口４３より研磨材が押し出される。このとき、研磨材供給量調整バルブ４５により研磨材加圧圧縮空気３２の圧力を調整し、研磨材供給口４３の研磨材は研磨材ホース１２に送られ、前記研磨材加圧圧縮空気３２によりノズル本体１１まで運ばれ、ノズルチップ１４より研磨材が噴射される。
【０００５】
また、従来の直圧式における研磨材供給装置７０としては、例えば図９に示すように、研磨材から粉塵を分級して再利用可能な研磨材を回収する直圧式における回収タンク７１の底面近傍の下部に、当該回収タンク７１の側壁から内部を通過し前記側壁の反対側の側壁７２を貫通する給送管７３を設け、前記給送管７３の上部に小径の導入孔７４を設けている。前記給送管７３の一端は図示せざる研磨材供給管を介して噴射ノズルに連通し、給送管７３の他端は図８の回収タンク７１の側壁の外方へ臨んでいる。
【０００６】
回収タンク７１内の研磨材が給送管７３に設けた導入孔７４から給送管７３内へ徐々にほぼ一定の速度で落下するにつれて、回収タンク７１内の研磨材に図９に一点鎖線に示すようなすり鉢状の穴ができ、このすり鉢状の穴は次第に拡がっていく。一方、導入孔７４から落下した研磨材は給送管７３内へ円錐体を成すように積み上げられ、この円錐体の研磨材は給送管７３内を流れる空気流により噴射ノズルへ向けて吸引される。
【０００７】
【発明が解決しようとする課題】
前述のように、最近のブラスト加工は、微少切削に利用され、そのため、噴射量を正確にコントロールすることが求められているが、従来のブラスト加工装置にあっては以下のような問題点があった。
【０００８】
前述の従来の直圧式ブラスト加工装置においては、エネルギー効率が高く、強烈なブラスト噴射が得られるが、研磨材を加圧タンク内において加圧して吐出するために一度研磨材を加圧タンクに入れる必要があり、連続噴射ができなかった。
【０００９】
また、研磨材の供給量、従って噴射量は、研磨材供給口４３の内径及び研磨材供給量調整バルブ４５を調整して研磨材加圧圧縮空気３２の量を調整するしかないことに加え、研磨材加圧タンク４２内の研磨材量によっても研磨材の噴射量が変化する傾向があり、研磨材供給量を細かくコントロールすることができなかった。
【００１０】
前述した研磨材供給手段において、回収タンク７１及び研磨材を貯溜する単なる研磨材の貯溜タンク等を含む回収タンクから給送管７３へ落下する研磨材供給量は、導入孔７４の大きさ、研磨材の材質、粒径、比重等の違いにより大きく左右されていた。さらに、回収タンク７１内の研磨材の量が多いときと少ないときでは回収タンクから給送管７３へ落下する研磨材の量や速度が異なる場合があった。研磨材を噴射ノズルから被加工物へ向けて噴射すると、被加工物へ衝突して破損した再利用不可能な研磨材は、回収タンク７１で分級されてダストコレクタへ送られ破棄される。したがって、ブラスト加工を行うにつれて、回収タンク７１内の研磨材量が減少するため、給送管７３内への研磨材の落下量は必ずしも一定量にならないという問題があった。
【００１１】
また、研磨材には微粉性質を示すものと微粉性質を示さないものがある。微粉性質とは、回収タンク内の底部に集積した研磨材の安息角θが一定にならないほどの微粉状態を示す性質をいう。なお、研磨材が微粉性質を示す要因は、研磨材の材質、比重、粒径、及び回収タンク内の圧力等によって異なる。微粉性質を示す研磨材は、従来の研磨材供給装置７０を用いると、微粉特有の相互の付着力のために互いに吸着したり回収タンク７１の壁面に付着するなどして安息角θが一定にならず、図１０に示すように回収タンク７１内の研磨材は導入孔７４の直上方に穴が開いた状態になり、あるいは図１１に示すように導入孔７４の上部に空洞７５を形成して研磨材が落下しなくなることがあった。
【００１２】
サクション式ブラスト装置にあっては、連続的に噴射できるが直圧式より噴射性能が劣る。
【００１３】
以上のように、従来の研磨材供給・噴射方法及び装置においては、回収タンクから常に一定量の研磨材を噴射ノズルへ供給し、噴射することが難しいという問題点があった。
【００１４】
本発明は、途上の問題を解決するためになされたもので、研磨材回収タンクから噴射ノズルへ定量の研磨材を安定した状態で、且つ連続的に供給し、噴射するための研磨材供給・噴射方法及び装置を提供し、さらに、研磨材の種類に応じて所望の研磨材供給・噴射量を容易に設定でき、微細加工、微少切削に対応し、且つ加工ラインの自動化が可能な研磨材供給・噴射方法及び装置を提供することを目的とする。
【００１５】
【課題を解決するための手段】
上記目的を達成するために、本発明の直圧式での連続的な研磨材供給・噴射方法は、水平回転自在な研磨材供給盤２０と、前記研磨材供給盤２０の上面に臨み開口する装填口２７が下部に形成された研磨材回収タンク２６、研磨材供給管３０を介して噴射ノズル１１と連通する送受管２９、及び射出空気供給源と連通する導管２８を備え、前記送受管２９を前記研磨材供給盤２０の上面に臨み開口すると共に、前記送受管１９と同一内径に形成された前記導管２８を、前記送受管２９の開口に対向する位置で前記研磨材供給盤２０の下面に臨み開口させた研磨材供給・噴射装置を設け、
前記研磨材供給盤２０に、その上面で上端を開口する複数の研磨材供給孔２４と、前記研磨材供給孔２４に対して小径に形成され、一端を前記各研磨材供給孔２４の下端にそれぞれ連通すると共に、他端を研磨材供給盤２０の下面において開口した研磨材射出孔２５を形成し、
前記研磨材供給盤２０を水平回転させ、前記研磨材供給孔２４に研磨材回収タンク２６内の研磨材を前記研磨材回収タンク２６の装填口２７から装填ないし捕集し、前記研磨材供給孔２４の回転軌跡において、研磨材の装填された前記研磨材供給孔２４を前記送受管２９の開口と前記導管２８の開口間に配置して、該位置において前記導管２８と連通した研磨材射出孔２５に射出空気を導入して、前記研磨材供給孔の下端から射出空気を注入し、上端から射出して噴射ノズルへ連通する前記研磨材供給管３０へ供給することを特徴とする（請求項１；図２，３）。
【００１６】
また、本発明の別の直圧式連続研磨材供給・噴射方法は、水平回転自在な研磨材供給盤２０と、前記研磨材供給盤２０の上面に臨み開口する装填口２７が下部に形成された研磨材回収タンク２６、研磨材供給管３０を介して噴射ノズル１１と連通する送受管２９、及び射出空気供給源と連通する導管２８を備えた研磨材供給・噴射装置を設け、
前記研磨材供給盤２０に、その上面で上端を開口する複数の研磨材供給孔２４と、前記研磨材供給孔２４に対して小径に形成され、前記各研磨材供給孔２４の下端にそれぞれ形成された研磨材射出孔２５と、前記研磨材射出孔２５に一端を連通すると共に、他端を研磨材供給盤２０の上面において開口した通孔２５’を形成すると共に、
前記研磨材供給盤２０を水平回転させ、前記研磨材供給孔２４に研磨材回収タンク２６内の研磨材を前記研磨材回収タンク２６の装填口２７から装填し、前記研磨材供給孔２４の回転軌跡において、研磨材の装填された前記研磨材供給孔２４の上端を前記送受管２９に連通すると共に、前記送受管２９に連通された研磨材供給孔２４と連通する前記通孔２５’の他端部の１つに対して前記導管２８を連通して、前記研磨材供給孔２４の下端から射出空気を注入し、上端から射出して噴射ノズルへ１１連通する前記研磨材供給管３０へ供給することを特徴とする（請求項２，図４，５）。
【００１７】
更に、本発明の直圧式連続研磨材供給・噴射方法の別の構成としては、外周の一部を研磨材回収タンク２６内の研磨材層中に埋没した状態で垂直回転自在な研磨材供給盤２０と、研磨材供給管３０を介して噴射ノズル１１と連通する送受管２９、及び射出空気供給源と連通する導管２８を備えた研磨材供給・噴射装置を設け、
前記研磨材供給盤２０に、その外周面で開口する複数の研磨材供給孔２４と、前記研磨材供給孔２４に対して小径に形成され、前記研磨材供給盤２０の中心側における前記各研磨材供給孔２４の端部にそれぞれ連通する研磨材射出孔２５と、前記研磨材射出孔２５に一端を連通し、他端を前記研磨材供給盤２０の外周面において開口する通孔２５’を形成し、
前記研磨材供給盤２０を垂直回転させ、複数の前記研磨材供給孔２４に前記研磨材回収タンク２６内の研磨材３４を捕集し、前記研磨材供給孔２４の回転軌跡において、研磨材を捕集した前記研磨材供給孔２４を前記送受管２９に連通すると共に、前記送受管２９に連通された研磨材供給孔２４と連通する前記通孔２５’の他端部の１つに対して前記導管２８を連通して、前記研磨材供給盤２０の中心側における前記研磨材供給孔２４の端部から射出空気を注入し、前記研磨材供給盤２０の外周側における端部から射出して噴射ノズル１１へ連通する前記研磨材供給管３０へ供給することを特徴とする（請求項３；図６，７）
【００１８】
噴射ノズルの射出口内径が大きく空気消費量が大きくなるときは、前記研磨材を射出空気により研磨材供給管に供給すると共に、前記研磨材を圧送する加圧空気を前記研磨材供給管に供給することが有効である。（請求項４）。
【００１９】
前記研磨材の噴射量は、前記研磨材供給盤を設定回転数又は速度において回転し、あるいは、前記研磨材供給孔の数、密度、配列の位置又は数、体積、容量、又は開口部の面積を変更し、任意設定量に調整できる（請求項５）。
【００２０】
さらに、前記研磨材回収タンクに振動を加えるか（請求項６）、又は研磨材回収タンク内の研磨材を攪拌して、前記研磨材供給盤に落下する研磨材の設定量をより確実に一定に維持することもできる（請求項７）。
【００２１】
また、本発明の研磨材供給・噴射装置にあっては、回転駆動手段によって水平回転自在な研磨材供給盤２０と、前記研磨材供給盤２０の上面に臨み開口する装填口２７が下部に形成された研磨材回収タンク２６、研磨材供給管３０を介して噴射ノズル１１と連通する送受管２９、及び射出空気供給源と連通する前記送受管２９と同一内径に形成された導管２８を設け、
前記研磨材供給盤２０の上面で上端を開口する複数の研磨材供給孔２４と、前記研磨材供給孔２４に対して小径に形成され、一端を前記各研磨材供給孔２４の下部にそれぞれ連通すると共に、他端を研磨材供給盤２０の下面において開口した研磨材射出孔２５を前記研磨材供給盤２０に形成し、
前記送受管２９を、前記研磨材供給孔２４の上端開口の回転軌跡上において前記研磨材供給盤２０の上面に臨み開口し、前記導管２８を、前記研磨材射出孔２５の他端開口の回転軌跡上において前記研磨材供給盤２０の下面に臨む位置に、前記送受管２９の開口と対向させて開口したことを特徴とする（請求項８；図２）。
【００２２】
前記構成の直圧式連続研磨材供給・噴射装置において，前記研磨材射出孔２５の他端を研磨材供給盤２０の下面において開口した構成に代え、前記各研磨材供給孔２４の下部にそれぞれ連通する研磨材射出孔２５を研磨材供給盤２０の下面に開口することなく、この研磨材射出孔２５に一端を連通し、他端を前記研磨材供給盤２０上面において開口する通孔２５’を形成し、前記導管２８を、前記通孔２５’の他端開口の１つに対して連通可能なサイズに形成して、前記通孔の他端開口の回転軌跡上において前記研磨材供給盤２０の上面に臨み開口することができる（請求項９；図４）。また、研磨材供給盤２０を回転駆動手段で外周の一部を研磨材回収タンク２６内の研磨材層中に埋没した状態で垂直方向で回転自在に設け、前記研磨材供給盤の外周面に円周方向に連続する複数の研磨材供給孔２４を形成し、さらに、前記研磨材供給孔２４に対して小径に形成され、前記研磨材供給盤２０の中心側における前記各研磨材供給孔２４の端部にそれぞれ連通する研磨材射出孔２５と、一端を前記研磨材射出孔２５に連通し、他端を前記研磨材供給盤２０の外周面において開口する通孔２５’を前記研磨材供給盤２０に形成すると共に、前記導管２８を、前記通孔２５’の他端開口の１つに対して連通可能なサイズに形成し、前記送受管２９を、前記研磨材供給孔２４の開口の回転軌跡上において前記研磨材層より露出した上部位置における前記研磨材供給盤２０の外周面に臨み開口し、前記導管２８を、前記通孔２５’の他端開口の回転軌跡上において前記研磨材層より露出した上部位置における前記研磨材供給盤２０の外周面に臨み開口した構成とすることができる（請求項１０；図６）。
【００２３】
さらに、前記研磨材供給管３０を加圧空気供給源に連通することで、より高い噴射圧力を得ることができる（請求項１１；図２〜図６）。
【００２４】
また、前記研磨材供給孔の内径を１mm以下とすれば、射出孔から供給孔への射出空気流を確実に一定の安定したものにすることができる（請求項１２）。
【００２５】
前記研磨材供給孔を、複数の研磨材供給孔をそれぞれ同一の回転軌跡を描く環状に１又は複数列条、このましくは、各列が研磨材供給盤の回転中心に対して同心円状に形成することができる（請求項１３）。
【００２６】
また、複数列条形成した研磨材供給孔の水平又は垂直の回転軌跡に臨ませて、それぞれ、前記送受管及び前記複数の噴射ノズルに連通する複数の研磨材供給管を、前記列ごとに複数配置し、自動ラインにおける加工効率を高めることができる（請求項１４）。
【００２７】
【発明の実施の形態】
本発明の研磨材供給・噴射方法及び装置の実施の形態について、以下に図を参照して説明する。
【００２８】
本発明の研磨材供給・噴射装置を設置するブラスト加工装置５０は、前記被加工物へ研磨材を噴射する噴射ノズル１１を備え、且つ被加工物を投入するキャビネット５１と噴射ノズル１１から噴射された研磨材から粉塵を分離して再使用可能な研磨材を回収し、貯溜する研磨材回収タンク２６と管を介して連通し、このようなブラスト加工装置に送風機や排風機、圧縮機などの気流発生手段を連通して、気流をキャビネット５１から研磨材回収タンク２６へ発生させ、この気流に研磨材或いは粉塵を載せて移送する。前記研磨材回収タンク２６はそれ自体が所謂サイクロンであってもよく、或いはサイクロン１３の下部に連通し、当該サイクロン１３の研磨材を単に貯溜するタンクであってもよい。
【００２９】
なお、本明細書において、各種研磨材噴射方式における噴射ノズルに研磨材供給管を介して研磨材を供給するタンクとして機能するタンクを総称して「研磨材回収タンク」という。
【００３０】
前記サイクロン１３の下部に連通する研磨材回収タンク２６は、下部に研磨材供給孔２４に連通する装填口２７を設け、前記研磨材回収タンク２６内に貯溜した研磨材３４が前記研磨材供給孔２４に落下して流入し、充填ないし装填されるようになっている。
【００３１】
好ましくは、前記研磨材回収タンク２６に図示せざるバイブレーターなどの振動発生手段または圧縮空気などによるタンク内研磨材の攪拌手段を連結し、研磨材供給孔２４への研磨材３４の流入を確実にし、つまり、前記振動発生手段及び攪拌手段により、研磨材回収タンク２６内の研磨材３４のブリッジを防ぐことにより、研磨材供給孔２４への研磨材供給量が一定量となる。
【００３２】
前記研磨材供給孔２４を有する研磨材供給盤２０は、モータ２１等の回転駆動手段の回転力で等速度に水平回転する好ましくは合成樹脂製の平板円盤状であり、前記装填口２７と前記研磨材供給孔２４が連通するように、前記装填口２７の下部に近接して設ける。なお、研磨材供給盤２０の厚さは、研磨材の供給・噴射量に対応して任意に設定でき、厚く形成すれば、研磨材供給孔２４の容積も大きく形成でき、多くの研磨材３４を効率よく供給できる。
【００３３】
また、前記研磨材供給孔２４は、前記研磨材供給盤２０の厚さ方向に穿設形成され、その形状は、流入した研磨材が研磨材供給孔２４から落下せず且つ貫通した挿孔である必要がある。つまり、研磨材供給孔２４に流入した研磨材が、好ましくは金属製の送受口２２の下部に移送され、該研磨材を、射出空気３１を成すここでは圧縮空気で射出され吹き上げることができればどのような形状でもよいが、好ましくは前記挿孔下部の射出孔２５の内径が、挿孔上部の供給孔２４の内径よりも小さく、より好ましくは前記射出孔２５の内径が１mm以下で形成すれば、微粉研磨材でも、研磨材が研磨材供給孔２４から落下せずに射出空気３１で供給孔２４より射出される。
【００３４】
また、研磨材供給孔２４は、複数の貫通した挿孔をそれぞれ同一の回転軌跡を描く複数の、実施例では、３本の環状に形成し、また、１又は複数列条に形成することができる。なお、この際前記複数の環状の挿孔列は、内周側及び外周側の各列において研磨材供給盤２０の直径方向において互いに重ならない位置に設ければ、各挿孔は、研磨材供給盤２０の回転中常に前記送受口２２の内に複数位置することとなり、前記送受口２２への研摩材３４の供給が途切れることがない。
【００３５】
噴射ノズル１１に連通する研磨材供給管３０は、これを分岐して送受管２９とし、この送受管２９の端部に形成した送受口２２は、前記複数列の研磨材供給孔２４の回転軌跡、実施例では、複数の前記研磨材供給孔２４のすべての回転軌跡、に臨ませて形成されている。
【００３６】
また、研磨材供給孔２４（射出孔２５）は、図示せざる射出空気供給源に研磨材供給孔２４、保持口２３及び導管２８を介して連通している。すなわち、前記送受口２２の研磨材供給盤２０の反対方向他側面には、射出空気供給源に連通する導管２８の端部に形成した好ましくは金属製の保持口２３が研磨材供給盤２０が回転可能に可及的接近して設けられている。
【００３７】
研磨材供給孔２４に流入した研磨材は、前記研磨材供給盤２０の回転により、前記送受口２２の下部に移送され、導管２８からの射出空気３１により射出され吹き上げられて前記送受管２９に送られる。このとき、研磨材が外部に漏れないようにするために、前記研磨材供給盤２０に対して、低摩擦材料の送受口２２及び回転盤押え２３を可及的に近接して設けることが望ましい。
【００３８】
送受管２９に送られた研磨材は、射出空気３１により研磨材供給管３０を経て噴射ノズル１１より噴射されるが、微粉研磨材では、上記射出空気単独で研磨材の供給および加工が可能であるが、研磨材の材質、比重ないし粒径によっては、研磨材の研磨材供給孔２４からの射出は十分としても、この射出空気３１とは別に図示せざる加圧空気供給源を研磨材供給管３０に連結し、この加圧空気３２、ここでは、圧縮空気により研磨材を被加工物に噴射することにより高圧での噴射が可能となる。
【００３９】
また、射出空気３１の注入流量は、前記研磨材供給孔２４の下部の内径が小さいために、前記加圧空気３２の流量に比べ少ない。したがって、常時定量の圧縮空気により研磨材が噴射されるので、安定したブラスト加工が可能である。
【００４０】
また、前記研磨材供給孔２４を複数列条に形成した場合、それぞれの研磨材供給孔２４の回転軌跡に臨ませて複数の送受口２２を設け、該複数の送受口２２それぞれに対して連通した噴射ノズル１１を備えると、被加工物に複数の噴射ノズル１１から研磨材を安定して噴射することができ、同時に、自動ラインにおける加工効率を高めることができる。
【００４１】
以下に、さらに具体的な実施の形態について図面を参照して説明する。
【００４２】
図１及び図２において、所謂サイクロンをなす粉塵を研磨材から分離する機構を備えた研磨材回収タンク２６の底部には、粉塵を分離した後の再使用可能な研磨材３４が貯溜され、前記研磨材回収タンク２６の底部には、研磨材供給孔２４に連通した装填口２７が設けられ、研磨材回収タンク２６内に貯溜した研磨材３４が前記研磨材供給孔２４に流入するようになっている。
【００４３】
２０は研磨材供給盤で、本実施例では図１〜図３に示すように、研磨材供給盤２０の厚さ方向に、研磨材供給盤の回転中心に対して同心円状に、その回転方向に連続する円形の貫通する挿孔である研磨材供給孔２４を３列平行に形成している。
【００４４】
また、前記挿孔は上部の供給孔２４内径を３mm、深さ３０mm、下部の射出孔２５内径を０．５mmとした。
【００４５】
研磨材供給盤２０は、研磨材供給孔２４が前記装填口２７を介して前記研磨材回収タンク２６に連通するように、しかも水平回転自在に回転軸で軸承されている。前記回転軸は回転モータ２１の回転駆動手段に連結されているが、回転駆動手段の回転速度は既知の手段により回転数が調整自在に構成されている。
【００４６】
図１、図２及び図３において、２２は送受管で、噴射ノズル１１に連通する研磨材供給管３０に連結しており、送受管２９の後端面は前記研磨材供給盤２０の研磨材供給孔２４の開口面よりやや大きい円状の開口面を有する送受口２２を形成している。また、図示せざる射出空気供給源に連通する導管２８に、射出空気供給方向前方端で、前記送受口２２と同形状で同軸上に保持口２３が形成され、前記送受口２２と研磨材供給孔２４を介して連通している。
【００４７】
研磨材供給盤２０が回転駆動手段により等速度で回転すると、研磨材供給孔２４内に装填口２７から落下、装填された研磨材回収タンク２６内の研磨材が送受口２２下部に移送される。フットスイッチあるいはマイクロスイッチの作動により図示せざる電磁弁を開放して射出空気供給源から前記導管２８を介して射出空気３１を送ると、研磨材供給孔２４内の研磨材が送受口２２及び送受管２９を介して研磨材供給管３０内に射出され吹き上げられる。同時に、前記研磨材供給管３０は図示せざる加圧空気供給源に連通し、送受管２９を介して送られてきた研磨材を加圧空気３２もあいまって、高圧で噴射ノズル１１から噴射される。
【００４８】
さらに、前記研磨材回収タンク２６にバイブレーター又は撹拌手段を連結し、研磨材回収タンク２６に振動を与えるか又は研磨材回収タンク２６内の研磨材３４を撹拌することにより、研磨材３４が装填口２７より研磨材供給孔２４内に十分に流入し、研磨材供給孔２４に流入する研磨材の量は常時、定量になり、より一層安定した状態で一定量の研磨材が供給される。
【００４９】
なお、研磨材供給盤２０の回転速度を調整することにより回転数の増減を図り、噴射ノズル１１への研磨材供給量を調整することができる。例えば、研磨材供給盤２０の回転速度を速くすることにより研磨材が多く供給され、研磨材供給盤２０の回転速度を遅くすることにより研磨材が少なく供給される。なお、研磨材供給盤２０の回転速度を一定に維持することにより、常時安定した状態で一定量の研磨材が噴射ノズル１１へ供給され、定量の研磨材が噴射ノズル１１から連続して安定的に被加工物へ噴射される。したがって、他の研磨材供給孔２４の容積あるいは、送受口２２の開口面積などが一定のとき、研磨材供給盤２０の回転速度と研磨材供給量は相関関係にあるので、この関係式を求めて研磨材供給量を研磨材供給盤２０の回転速度でデジタル化することにより所望の研磨材供給量を容易に調整できる。
【００５０】
キャビネット５１内で研磨材を噴射ノズル１１から被加工物へ噴射して被加工物をブラスト加工すると、研磨材は再使用可能な研磨材と、破損した再使用不可能な研磨材になり、これらの研磨材と被加工物が剥離して生じた粉塵等が共に導管５２を介して気流に乗ってサイクロン１３へ給送される。このサイクロン１３で再使用可能な研磨材から再使用不可能な研磨材と粉塵が分離され、再使用不可能な研磨材や粉塵はダストコレクタ５３へ給送され、ダストコレクタ５３内の下部に集積され、清浄な空気がダストコレクタ５３の排風機５４から外気へ放出される。一方、再使用可能な研磨材は研磨材回収タンク２６の底部へ貯溜した後、前述した動作が繰り返される。
【００５１】
上述の研磨材供給・噴射方法及び装置を用いて以下の加工条件にて、ブラスト加工した。
【００５２】
【表１】

【００５３】
上記ブラスト加工にて、射出圧縮空気と加圧圧縮空気の供給流量を測定したところ、１：１７となり、射出圧縮空気は少量で十分であった。したがって、研磨材は常時一定量の加圧圧縮空気によって噴射され、加工の強い部分と弱い部分の差は３０cm² あたり３％以下となり、均一な加工が得られた。
【００５４】
図４及び図５は、研磨材供給盤２０の側面に円周方向に連続する複数の研磨材供給孔２４を、この実施態様では２列同心円状に平行に複数列形成し、この２列の各研磨材供給孔２４のそれぞれ下部の研磨材射出孔２５，２５下端に連通する、コ字状に屈曲形成した一の通孔２５’を穿設し、研磨材供給盤２０の外周縁近傍で研磨材供給盤２０上に通孔２５’を開口するよう形成している。通孔２５’を研磨材供給盤２０上に開口することにより、研磨材供給孔からの研磨材の落下を完全に防止できる。
【００５５】
そして、前記開口に対して前記導管２８が対向するように送受管２９近傍に送受口２２が設けられ、この送受口２２は、前記研磨材供給孔２４，２４の開口よりやや大きい挿孔２２’、２２’を形成したものである。
【００５６】
噴射工程は、図１〜図３に示す実施態様とほぼ同様である。
【００５７】
研磨材供給孔２４内に装填口２７から落下、装填された研磨材回収タンク２６内の研磨材が送受口２２下部に移送され、射出空気供給源から前記導管２８を介して射出空気３１を送ると、通孔２５’を経て研磨材射出孔２５，２５から射出空気３１により研磨材供給孔２４，２４内の研磨材が送受口２２の挿孔２２’、２２’そして送受管２９を介して研磨材供給管３０内に射出され吹き上げられる。ここで、必要に応じて、送受管２９を介して送られてきた研磨材を加圧空気３２により高圧で噴射ノズル１１から噴射される。
【００５８】
図６及び図７は、図３〜図５における研摩材供給盤２０を垂直位置において回転する構成を示すもので、２６は研磨材回収タンクで、略直方体を成す好ましくは密閉型のタンクで、研磨材回収タンク２６内の下部に流入した研磨材で成る研磨材層１７が下方に形成され、当該研磨材層１７の上方に空気層１８が形成される。
【００５９】
研磨材供給盤２０の外周面に円周方向に連続する複数の研磨材供給孔２４をこの実施態様では２列同心円状に形成し、前出図４及び図５の実施態様と同様、この２列の研磨材供給孔２４の下部の研磨材射出孔２５をコ字状に屈曲形成した通孔２５’を研磨材供給盤２０の外周面幅方向の外側でそれぞれ開口するよう形成している。
【００６０】
そして、前記通孔２５’の研磨材供給盤２０の外周面幅方向の一方外側に形成される開口に対して前記導管２８が対向するように送受口２２が設けられている。
【００６１】
研磨材供給盤２０は研磨材回収タンク２６内の研磨材層１７中で垂直方向に回転自在に回転軸６０で軸承され、研磨材供給盤２０の上部又は上部の一部分が空気層１８に露出する位置に設けているので、研磨材層１７中で捕集された研磨材を収納した研磨材供給孔２４が、送受口２２の下方に達すると、前記導管２８から供給された射出空気が通孔２５’を介して研磨材射出孔２５から研磨材供給孔２４に送られ、研磨材供給孔２４内の研磨材が押圧射出されて送受管２９へ送り出される。
【００６２】
【発明の効果】
本発明は、以上説明したように構成されているので、以下に記載されるような効果を奏する。
【００６３】
本発明は、たとえ微粉性質を示す研磨材に対しても一定量の研磨材を安定的に連続して噴射ノズルへ供給・噴射することができた。
【００６４】
本発明は研磨材供給盤の回転速度を変化させて、回転数を増減させることにより研磨材供給量の増減を図ることができ、また研磨材供給盤の回転速度に応じて研磨材を連続して安定した状態で一定量に供給することができる。したがって、研磨材供給盤の回転速度を自在に調整することにより、研磨材の種類に応じて所望の研磨材供給量に確実且つ容易に調整できる。しかも、研磨材供給量に対応する研磨材供給盤の回転速度をデジタル化することにより所望の研磨材供給量、したがって、噴射量を容易に調整できる。
【００６５】
あるいは、前記研磨材供給孔の数、密度、体積、容量、開口部の面積又は前記送受口の開口面積を変更し、任意設定量の研磨材を供給し噴射することができる。
【００６６】
本願発明においては、研磨材供給盤の研磨材供給孔に装填あるいは、捕集された研磨材を、射出空気にて研磨材供給管内に射出し、吹き上げ、さらに加圧空気で研磨材を噴射ノズルへ供給して噴射すれば、射出空気の供給量は加圧空気供給量に比べ少なく、したがって、一定量の空気で噴射でき、被加工物に対して均一なブラスト加工が可能となった。
【図面の簡単な説明】
【図１】本発明の研磨材供給・噴射装置を備えたブラスト加工装置の正面図である。
【図２】図１の研磨材供給・噴射装置の要部断面図である。
【図３】図２の研磨材供給・噴射装置の要部斜視図である。
【図４】本発明の研磨材供給・噴射装置の他の実施態様における要部断面図である。
【図５】図４の研磨材供給・噴射装置の斜視図である。
【図６】本発明の研磨材供給・噴射装置のさらに他の実施態様における要部断面を示す要部斜視図である。
【図７】図６の研磨材供給・噴射装置の要部斜視図である。
【図８】従来の直圧式のブラスト加工装置を示す正面図である。
【図９】従来の研磨材供給装置の要部断面を示し、特に微粉性質を示さない研磨材が給送管内に落下するときの研磨材の状態を示すものである。
【図１０】従来の研磨材供給装置の要部断面を示し、特に微粉性質を示す研磨材が給送管内に落下するときの研磨材の状態を示すものである。
【図１１】従来の研磨材供給装置の要部断面を示し、特に微粉性質を示す研磨材が内に落下するときの研磨材の状態を示すものである。
【符号の説明】
１１噴射ノズル（ノズル本体）
１２研磨材ホース
１３サイクロン
１４ノズルチップ
２０研磨材供給盤
２１回転モータ
２２送受口
２２’ 挿孔
２３保持口
２４研磨材供給孔
２５研摩材射出孔
２５’ 通孔
２６研磨材回収タンク
２７装填口
２８導管
２９送受管
３０研磨材供給管
３１射出（圧縮）空気
３２加圧（圧縮）空気
３４研磨材
４０研磨材回収タンク
４１ダンプバルブ
４２研磨材加圧タンク
４３研磨材供給口
４４研磨材加圧用圧縮空気供給口
４５研磨材供給量調整バルブ
４７研磨材加圧用圧縮空気
５０ブラスト加工装置
５１キャビネット
５２導管
５３ダストコレクタ
５４排風機
６０回転軸
６１補集孔
６２補集回転板
６３送受口
６４送受管
６５空気層
７０研磨材供給装置
７１回収タンク
７３給送管
７４導入孔
７５空洞
７６研磨材[0001]
BACKGROUND OF THE INVENTION
  In blasting, the abrasive in the abrasive recovery tank is quantitatively injected from the injection nozzle to the work piece, that is, maintaining the injection amount constant is an important blasting for good and stable blasting. This is one of the processing conditions, and in particular, in recent years, blasting has been increasingly used for performing fine cutting of several μm to several hundred μm in addition to traditional simple scale removal and deburring. For example, micro cutting by blasting is performed as an alternative to machining of semiconductor parts, fine ceramics, PDP (plasma display) and other thin film surfaces, machining of metal parts, laser processing, and ultrasonic processing. Yes. In particular, when these processes are performed by an automated line, the control of the injection amount is an important factor.
[0002]
  In order to meet such needs, the present invention supplies the abrasive in the abrasive tank to the injection nozzle in a continuous and quantitative manner, and is a direct pressure type of abrasive for injection. The present invention relates to a continuous supply / injection method and apparatus.
[0003]
[Prior art]
  When the blasting device is classified by the injection method, the abrasive is put in the abrasive recovery tank, the inside of the tank is pressurized with compressed air, the abrasive is pumped, and the pressure is injected from the nozzle, and the ejector by jetting compressed air It is divided into a suction type in which the abrasive is sucked into the nozzle structure by the suction force due to the effect, and the abrasive is sprayed together with the compressed air from the tip.
[0004]
  In FIG. 8 showing a conventional direct pressure blasting apparatus, in the abrasive recovery tank 40, the abrasive after spraying and the dust are separated, the dust is sent to the dust collector 53, and the abrasive falls downward and the polishing is performed. It collects in the lower part of the material recovery tank 40. An abrasive pressure tank 42 is provided below the abrasive material recovery tank 40. When the abrasive material pressure tank 42 runs out of abrasive material, the dump valve 41 is lowered and the abrasive material in the abrasive material recovery tank 40 is pressurized. Enter tank 42. When the abrasive enters the abrasive pressure tank 42, the compressed air 47 for pressurizing the abrasive enters from the compressed air supply port 44 for pressurizing the abrasive. At the same time, the dump valve 41 is closed to increase the pressure in the abrasive pressure tank 42. The abrasive material is pushed out from the abrasive material supply port 43. At this time, the pressure of the abrasive pressurization compressed air 32 is adjusted by the abrasive supply amount adjusting valve 45, and the abrasive of the abrasive supply port 43 is sent to the abrasive hose 12, and the abrasive pressurization compressed air 32 It is carried to the nozzle body 11 and the abrasive is sprayed from the nozzle tip 14.
[0005]
  In addition, as shown in FIG. 9, for example, as shown in FIG. 9, the conventional direct pressure type abrasive supply device 70 classifies dust from the abrasive and collects reusable abrasive in the vicinity of the bottom surface of the recovery tank 71 in the direct pressure type. A feed pipe 73 that passes through the inside of the collection tank 71 from the side wall and penetrates the side wall 72 opposite to the side wall is provided in the lower part, and a small-diameter introduction hole 74 is provided in the upper part of the feed pipe 73. One end of the feed pipe 73 communicates with the spray nozzle via an unillustrated abrasive feed pipe, and the other end of the feed pipe 73 faces the outside of the side wall of the recovery tank 71 in FIG.
[0006]
  As the abrasive in the collection tank 71 gradually drops from the introduction hole 74 provided in the feed pipe 73 into the feed pipe 73 at a substantially constant speed, the abrasive in the collection tank 71 is shown by a one-dot chain line in FIG. A mortar-shaped hole is formed as shown, and this mortar-shaped hole gradually expands. On the other hand, the abrasive that has fallen from the introduction hole 74 is piled up into the feed pipe 73 so as to form a cone, and the abrasive in the cone is sucked toward the injection nozzle by the air flow flowing in the feed pipe 73. The
[0007]
[Problems to be solved by the invention]
  As described above, recent blasting is used for micro-cutting, and therefore, it is required to accurately control the injection amount. However, the conventional blasting machine has the following problems. there were.
[0008]
  In the above-described conventional direct pressure type blasting apparatus, energy efficiency is high and intense blast injection can be obtained. However, the abrasive is once put in the pressurized tank in order to pressurize and discharge the abrasive in the pressurized tank. It was necessary and continuous injection was not possible.
[0009]
  In addition, the supply amount of the abrasive material, and hence the injection amount, can only be adjusted by adjusting the inner diameter of the abrasive material supply port 43 and the abrasive material supply amount adjusting valve 45 to adjust the amount of the pressurized compressed air 32 of the abrasive material, The amount of abrasive sprayed tends to change depending on the amount of abrasive in the abrasive pressure tank 42, and the amount of abrasive supplied cannot be finely controlled.
[0010]
  In the above-described abrasive material supply means, the amount of abrasive material that falls from the collection tank 71 including the recovery tank 71 and the mere abrasive material storage tank for storing the abrasive material to the feed pipe 73 is the size of the introduction hole 74, the polishing material It was greatly influenced by differences in the material, particle size, specific gravity, and the like. Furthermore, there are cases where the amount and speed of the abrasive falling from the recovery tank to the feed pipe 73 differ between when the amount of abrasive in the recovery tank 71 is large and when it is small. When the abrasive is sprayed from the spray nozzle toward the workpiece, the non-reusable abrasive that collides with the workpiece and is damaged is classified by the recovery tank 71 and sent to the dust collector and discarded. Therefore, as the blasting process is performed, the amount of abrasive in the collection tank 71 decreases, so that the amount of abrasive dropped into the feed pipe 73 is not always constant.
[0011]
  In addition, some abrasives show fine powder properties and others do not show fine powder properties. The fine powder property refers to a property showing a fine powder state such that the angle of repose θ of the abrasive accumulated at the bottom in the recovery tank is not constant. The factor that the abrasive exhibits fine powder properties varies depending on the material of the abrasive, the specific gravity, the particle size, the pressure in the recovery tank, and the like. Abrasives exhibiting fine powder properties can have a constant angle of repose θ when adhering to each other or adhering to the wall surface of the recovery tank 71 due to the mutual adhesive force specific to the fine powders by using the conventional abrasive supply device 70. Instead, as shown in FIG. 10, the abrasive in the recovery tank 71 is in a state where a hole is opened directly above the introduction hole 74, or a cavity 75 is formed above the introduction hole 74 as shown in FIG. As a result, the abrasive may not fall.
[0012]
  In the suction type blasting apparatus, it is possible to inject continuously, but the injection performance is inferior to that of the direct pressure type.
[0013]
  As described above, the conventional abrasive supply / injection method and apparatus have a problem that it is difficult to always supply and inject a fixed amount of abrasive from the recovery tank to the injection nozzle.
[0014]
  The present invention was made in order to solve the problems on the way, and supplies a constant amount of abrasive from the abrasive recovery tank to the injection nozzle in a stable state and continuously supplies and injects the abrasive. Abrasive material that provides an injection method and apparatus, and that can easily set the desired abrasive supply / injection amount according to the type of abrasive material, is compatible with micromachining and micromachining, and can automate the machining line It is an object of the present invention to provide a supply / injection method and apparatus.
[0015]
[Means for Solving the Problems]
  In order to achieve the above object, the direct pressure type continuous abrasive supply / injection method of the present invention isThe spray nozzle 11 passes through a polishing material supply disk 20 that can rotate horizontally, a polishing material recovery tank 26 having a loading port 27 that faces the top surface of the polishing material supply panel 20 and is formed in the lower part, and a polishing material supply pipe 30. A pipe 28 that communicates with an injection air supply source. The pipe 29 faces the upper surface of the abrasive material supply board 20 and opens, and is formed to have the same inner diameter as the pipe 19. The conduit 28 is connected to the abrasive supply board 20 at a position facing the opening of the transmission / reception tube 29. A polishing material supply / injection device that is open on the bottom is provided.
  The abrasive material supply board 20 is formed with a plurality of abrasive material supply holes 24 having an upper end opened on the upper surface thereof and a small diameter with respect to the abrasive material supply hole 24, and one end at the lower end of each abrasive material supply hole 24. Along with each communicating, an abrasive injection hole 25 having the other end opened at the lower surface of the abrasive supply board 20 is formed,
  AboveAbrasive supply board20The waterNormal timesTurnAboveAbrasive supply hole24Abrasive recovery tank26The abrasive in theAboveAbrasive recovery tank26Loading port27Loaded or collected from the abrasive material supply hole24In the rotation trajectory ofThe abrasive supply hole 24 loaded with the abrasive is disposed between the opening of the transmission / reception tube 29 and the opening of the conduit 28, and the injection air is introduced into the abrasive injection hole 25 communicating with the conduit 28 at the position. do it,Of the abrasive supply holelower endInjected air fromTopAnd then communicate with the injection nozzleAboveAbrasive supply pipe30(Claim 1; FIG. 2)3).
[0016]
Further, according to another direct pressure type continuous abrasive supply / injection method of the present invention, a horizontally-rotatable abrasive supply board 20 and a loading port 27 that opens toward the upper surface of the abrasive supply board 20 are formed in the lower part. An abrasive supply / injection device including an abrasive recovery tank 26, a transmission / reception tube 29 communicating with the injection nozzle 11 via an abrasive supply tube 30, and a conduit 28 communicating with an injection air supply source is provided.
  The abrasive material supply board 20 is formed with a plurality of abrasive material supply holes 24 having upper ends opened on the upper surface thereof, and with a small diameter with respect to the abrasive material supply holes 24, and formed at the lower ends of the respective abrasive material supply holes 24. The formed abrasive injection hole 25 is connected to the abrasive injection hole 25 at one end, and the other end is formed with a through hole 25 ′ opened on the upper surface of the abrasive supply board 20.
  The abrasive material supply board 20 is rotated horizontally, the abrasive material in the abrasive material recovery tank 26 is loaded into the abrasive material supply hole 24 from the loading port 27 of the abrasive material recovery tank 26, and the abrasive material supply hole 24 rotates. In the locus, the upper end of the abrasive supply hole 24 loaded with an abrasive is communicated with the transmission / reception tube 29 and the other through hole 25 ′ communicated with the abrasive supply hole 24 communicated with the transmission / reception tube 29. The conduit 28 communicates with one of the end portions, the injection air is injected from the lower end of the abrasive supply hole 24, the injection air is injected from the upper end, and is supplied to the abrasive supply tube 30 that communicates 11 with the injection nozzle. (Claims 2, 4 and 5).
[0017]
  Further, as another configuration of the direct pressure type continuous abrasive supply / injection method of the present invention, an abrasive supply plate which is vertically rotatable with a part of the outer periphery buried in the abrasive layer in the abrasive recovery tank 26. 20, an abrasive supply / injection device provided with a pipe 28 in communication with an injection air supply source, and a transmission / reception tube 29 in communication with the injection nozzle 11 through an abrasive supply tube 30;
  A plurality of abrasive material supply holes 24 opened on the outer peripheral surface of the abrasive material supply plate 20 and a small diameter with respect to the abrasive material supply hole 24, and each polishing on the center side of the abrasive material supply plate 20. An abrasive injection hole 25 that communicates with the end of the material supply hole 24, and a through hole 25 ′ that communicates with the abrasive injection hole 25 at one end and opens the other end at the outer peripheral surface of the abrasive supply plate 20. Forming,
  The abrasive material supply board 20 is rotated vertically, the abrasive material 34 in the abrasive material recovery tank 26 is collected in the plurality of abrasive material supply holes 24, and the abrasive material is moved along the rotation path of the abrasive material supply hole 24. The collected abrasive supply hole 24 communicates with the transmission / reception tube 29, and with respect to one of the other end portions of the through hole 25 'communicated with the abrasive supply hole 24 communicated with the transmission / reception tube 29. The conduit 28 communicates, and injection air is injected from the end of the abrasive supply hole 24 on the center side of the abrasive supply board 20, and injected from the end on the outer peripheral side of the abrasive supply board 20. Supplying to the abrasive supply pipe 30 communicating with the injection nozzle 11 (Claim 3; FIGS. 6 and 7)
[0018]
  When the injection nozzle has a large injection nozzle inner diameter and air consumption increases, the abrasive is supplied to the abrasive supply pipe by the injection air, and pressurized air for pumping the abrasive is supplied to the abrasive supply pipe It is effective to do. (Claims4).
[0019]
  in frontThe abrasive injection amount is determined by rotating the abrasive supply board at a set rotation speed or speed, or the number, density, position or number of the array of the abrasive supply holes, volume, capacity, or area of the opening. Can be adjusted to an arbitrarily set amount (claim 5).
[0020]
  Furthermore, vibration is applied to the abrasive recovery tank (Claim 6), or the abrasive in the abrasive recovery tank is agitated, and the set amount of the abrasive falling on the abrasive supply board is more reliably fixed. (Claim 7).
[0021]
  In the abrasive supply / injection device of the present invention,An abrasive supply board 20 that can be rotated horizontally by a rotation driving means, and an abrasive recovery tank 26 formed at a lower portion of the abrasive supply board 20 facing the upper surface of the abrasive supply board 20 and an abrasive supply pipe 30. A transmission / reception tube 29 communicating with the injection nozzle 11 and a conduit 28 formed to have the same inner diameter as the transmission / reception tube 29 communicating with the injection air supply source;
  A plurality of abrasive material supply holes 24 having an upper end opened on the upper surface of the abrasive material supply board 20 and a small diameter with respect to the abrasive material supply hole 24, and one end communicating with a lower part of each of the abrasive material supply holes 24. And forming an abrasive injection hole 25 having the other end opened in the lower surface of the abrasive supply board 20 in the abrasive supply board 20,
  The transmission / reception tube 29 is opened facing the upper surface of the abrasive supply board 20 on the rotation locus of the upper end opening of the abrasive supply hole 24, and the conduit 28 is rotated at the other end opening of the abrasive injection hole 25. An opening facing the opening of the transmission / reception tube 29 at a position facing the lower surface of the abrasive supply board 20 on the locus.(Claim 8; FIG. 2).
[0022]
In the direct pressure type continuous abrasive supply / injection apparatus having the above configuration, the other end of the abrasive injection hole 25 is replaced with a configuration in which the other end is opened in the lower surface of the abrasive supply plate 20, and communicates with the lower part of each abrasive supply hole 24. Without opening the abrasive injection hole 25 to be opened on the lower surface of the abrasive supply board 20, one end is communicated with the abrasive injection hole 25 and the other end is provided with a through-hole 25 ′ opening on the upper surface of the abrasive supply board 20. The conduit 28 is formed in a size that allows communication with one of the other end openings of the through hole 25 ′, and the abrasive material supply board 20 is on the rotation trajectory of the other end opening of the through hole. Open to the top of the(Claim 9; FIG. 4). Further, the abrasive supply board 20 is rotated by a driving means.In a state where a part of the outer periphery is buried in the abrasive layer in the abrasive recovery tank 26A plurality of abrasive supply holes 24 which are provided in a vertical direction so as to be freely rotatable and which are continuous in the circumferential direction are formed on the outer peripheral surface of the abrasive supply board.An abrasive injection hole 25 that is formed to have a small diameter with respect to the abrasive supply hole 24 and communicates with an end of each abrasive supply hole 24 on the center side of the abrasive supply board 20, and one end of the abrasive supply hole A through hole 25 ′ communicating with the injection hole 25 and having the other end opened in the outer peripheral surface of the abrasive supply board 20 is formed in the abrasive supply board 20, and the conduit 28 is connected to the other of the through holes 25 ′. The abrasive material supply disk is formed in a size capable of communicating with one of the end openings, and the transmission / reception tube 29 is located above the abrasive material layer on the rotation trajectory of the abrasive material supply hole 24. 20 and open to the outer peripheral surface of the abrasive material supply board 20 at the upper position exposed from the abrasive material layer on the rotation trajectory of the other end opening of the through hole 25 ′. didIt can be set as a structure (Claim 10; FIG. 6).
[0023]
  Furthermore, a higher injection pressure can be obtained by communicating the abrasive supply pipe 30 with a pressurized air supply source (claim 11; FIGS. 2 to 6).
[0024]
  Also, the abrasive supplyPerforatedInner diameterTheIf it is 1 mm or less, the injection air flow from the injection hole to the supply hole can be surely made constant and stable (claim 12).
[0025]
  The abrasive material supply holes are arranged in one or a plurality of rows in an annular shape that draw the same rotation trajectory in each of the plurality of abrasive material supply holes, or preferably, each row is concentric with the rotation center of the abrasive material supply board. It can be formed (claim 13).
[0026]
  In addition, facing the horizontal or vertical rotation trajectory of the abrasive supply holes formed in multiple rows,The transmission and reception tubes and theA plurality of abrasive supply pipes communicating with a plurality of injection nozzles can be arranged for each of the rows to increase the processing efficiency in the automatic line.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of an abrasive material supply / injection method and apparatus according to the present invention will be described below with reference to the drawings.
[0028]
  The blast processing apparatus 50 in which the abrasive material supply / injection apparatus of the present invention is installed includes an injection nozzle 11 for injecting the abrasive material to the workpiece, and is injected from the cabinet 51 and the injection nozzle 11 for injecting the workpiece. Dust is separated from the collected abrasives, and reusable abrasives are collected and communicated with the abrasive collection tank 26 for storage through a pipe. Such a blasting apparatus is connected to a blower, an exhaust fan, a compressor, etc. An airflow generating means is communicated to generate an airflow from the cabinet 51 to the abrasive recovery tank 26, and the abrasive or dust is placed on the airflow and transferred. The abrasive recovery tank 26 itself may be a so-called cyclone, or may be a tank that communicates with the lower part of the cyclone 13 and simply stores the abrasive of the cyclone 13.
[0029]
  In this specification, tanks that function as tanks that supply abrasives to the injection nozzles in various abrasive injection methods via an abrasive supply pipe are collectively referred to as “abrasive recovery tanks”.
[0030]
  The abrasive recovery tank 26 communicating with the lower part of the cyclone 13 is provided with a loading port 27 communicating with the abrasive supply hole 24 in the lower part, and the abrasive 34 stored in the abrasive recovery tank 26 is connected to the abrasive supply hole. It falls into 24, flows in, and is filled or loaded.
[0031]
  Preferably, a vibration generating means such as a vibrator (not shown) or a stirring means for the abrasive in the tank by compressed air is connected to the abrasive recovery tank 26 to ensure that the abrasive 34 flows into the abrasive supply hole 24. That is, by preventing the bridge of the abrasive 34 in the abrasive recovery tank 26 by the vibration generating means and the agitating means, the amount of abrasive supplied to the abrasive supply hole 24 becomes a constant amount.
[0032]
  The abrasive material supply board 20 having the abrasive material supply hole 24 is preferably a flat plate disk made of synthetic resin that rotates horizontally at a constant speed by the rotational force of a rotational drive means such as a motor 21. The abrasive supply hole 24 is provided close to the lower portion of the loading port 27 so as to communicate therewith. The thickness of the abrasive material supply board 20 can be arbitrarily set according to the amount of supply and injection of the abrasive material. If the abrasive material supply plate 20 is formed thick, the volume of the abrasive material supply hole 24 can be increased, and many abrasive materials 34 can be formed. Can be supplied efficiently.
[0033]
  Further, the abrasive supply hole 24 is formed in the thickness direction of the abrasive supply board 20, and the shape thereof is an insertion hole through which the flowing abrasive does not fall from the abrasive supply hole 24 and penetrates. There must be. That is, the abrasive material that has flowed into the abrasive material supply hole 24 is preferably transferred to the lower portion of the metal transmission / reception port 22, and the abrasive material can be injected and blown up with compressed air here, which forms the injection air 31. The inner diameter of the injection hole 25 at the lower part of the insertion hole is preferably smaller than the inner diameter of the supply hole 24 at the upper part of the insertion hole, and more preferably, the inner diameter of the injection hole 25 is 1 mm or less. Even in the case of a fine powder abrasive, the abrasive is not dropped from the abrasive supply hole 24 but is injected from the supply hole 24 by the injection air 31.
[0034]
  In addition, the abrasive supply hole 24 may be formed in a plurality of through holes, each having the same rotation locus, in the form of three rings, or in one or a plurality of rows. it can. At this time, if the plurality of annular insertion hole rows are provided in positions that do not overlap each other in the diameter direction of the abrasive material supply board 20 in each of the inner circumferential side and outer circumferential side rows, the respective insertion holes are supplied with the abrasive material. During rotation of the board 20, there are always a plurality of positions within the transmission / reception port 22, so that the supply of the abrasive 34 to the transmission / reception port 22 is not interrupted.
[0035]
  The abrasive material supply pipe 30 communicating with the injection nozzle 11 is branched into a transmission / reception tube 29, and the transmission / reception port 22 formed at the end of the transmission / reception tube 29 is a rotation locus of the plurality of rows of the abrasive material supply holes 24. In the embodiment, it is formed so as to face all the rotation trajectories of the plurality of abrasive supply holes 24.
[0036]
  Further, the abrasive supply hole 24 (injection hole 25) communicates with an injection air supply source (not shown) through the abrasive supply hole 24, the holding port 23, and the conduit 28. That is, on the other side opposite to the abrasive supply plate 20 in the transmission / reception port 22, a holding port 23 made of metal, preferably formed at the end of the conduit 28 communicating with the injection air supply source, is provided on the abrasive supply plate 20. It is provided as close as possible to be rotatable.
[0037]
  The abrasive material flowing into the abrasive material supply hole 24 is transferred to the lower part of the transmission / reception port 22 by the rotation of the abrasive material supply board 20, and is injected and blown up by the injection air 31 from the conduit 28 to the transmission / reception tube 29. Sent. At this time, in order to prevent the abrasive from leaking to the outside, it is preferable to provide the low-friction material sending / receiving port 22 and the rotary disc retainer 23 as close as possible to the abrasive supply board 20. .
[0038]
  The abrasive sent to the transmission / reception tube 29 is injected from the injection nozzle 11 by the injection air 31 through the abrasive supply tube 30. However, in the case of fine abrasive, the supply and processing of the abrasive can be performed by the injection air alone. However, depending on the material, specific gravity, or particle size of the abrasive, even though injection of the abrasive from the abrasive supply hole 24 is sufficient, a pressurized air supply source (not shown) is supplied to the abrasive separately from the injection air 31. By connecting the pipe 30 and injecting the abrasive to the workpiece by this pressurized air 32, here, compressed air, injection at a high pressure becomes possible.
[0039]
  The injection flow rate of the injection air 31 is smaller than the flow rate of the pressurized air 32 because the inner diameter of the lower part of the abrasive supply hole 24 is small. Therefore, since the abrasive is constantly sprayed with a fixed amount of compressed air, stable blasting is possible.
[0040]
  Further, when the abrasive supply holes 24 are formed in a plurality of rows, a plurality of transmission / reception ports 22 are provided facing the rotation trajectory of the respective abrasive supply holes 24 and communicated with each of the plurality of transmission / reception ports 22. When the injection nozzle 11 is provided, the abrasive can be stably injected from the plurality of injection nozzles 11 onto the workpiece, and at the same time, the processing efficiency in the automatic line can be increased.
[0041]
  Hereinafter, more specific embodiments will be described with reference to the drawings.
[0042]
  1 and 2, a reusable abrasive 34 after separating the dust is stored at the bottom of the abrasive recovery tank 26 having a mechanism for separating the so-called cyclone dust from the abrasive. A loading port 27 communicating with the abrasive supply hole 24 is provided at the bottom of the abrasive recovery tank 26, and the abrasive 34 stored in the abrasive recovery tank 26 flows into the abrasive supply hole 24. ing.
[0043]
  In this embodiment, as shown in FIGS. 1 to 3, reference numeral 20 denotes an abrasive supply board. In the thickness direction of the abrasive supply board 20, the rotation direction is concentric with the rotation center of the abrasive supply board. Abrasive material supply holes 24 that are circular through holes that are continuous with each other are formed in three rows in parallel.
[0044]
  The insertion hole had an inner diameter of the upper supply hole 24 of 3 mm, a depth of 30 mm, and an inner diameter of the lower injection hole 25 of 0.5 mm.
[0045]
  The abrasive material supply board 20 is supported by a rotary shaft so that the abrasive material supply hole 24 communicates with the abrasive material recovery tank 26 through the loading port 27 and is horizontally rotatable. The rotation shaft is connected to the rotation drive means of the rotation motor 21, and the rotation speed of the rotation drive means is configured such that the rotation speed can be adjusted by known means.
[0046]
  1, 2, and 3, reference numeral 22 denotes a transmission / reception pipe, which is connected to an abrasive supply pipe 30 that communicates with the injection nozzle 11, and a rear end face of the transmission / reception pipe 29 is an abrasive supply of the abrasive supply board 20. A transmission / reception port 22 having a circular opening surface slightly larger than the opening surface of the hole 24 is formed. In addition, a holding port 23 is formed on the conduit 28 communicating with an injection air supply source (not shown) at the front end in the injection air supply direction and has the same shape as the transmission / reception port 22, and is coaxial with the transmission / reception port 22. The holes 24 communicate with each other.
[0047]
  When the abrasive material supply board 20 is rotated at a constant speed by the rotation driving means, the abrasive material falls in the abrasive material supply hole 24 from the loading port 27, and the loaded abrasive material in the abrasive material recovery tank 26 is transferred to the lower part of the transmission / reception port 22. . When the solenoid valve (not shown) is opened by the operation of the foot switch or the micro switch and the injection air 31 is sent from the injection air supply source through the conduit 28, the abrasive in the abrasive supply hole 24 is transferred to the transmission / reception port 22 and the transmission / reception. It is injected into the abrasive supply pipe 30 through the pipe 29 and blown up. At the same time, the abrasive supply pipe 30 communicates with a pressurized air supply source (not shown), and the abrasive sent via the transmission / reception pipe 29 is injected from the injection nozzle 11 at high pressure together with the pressurized air 32. The
[0048]
  Further, a vibrator or agitation means is connected to the abrasive recovery tank 26, and the abrasive 34 is loaded by applying vibration to the abrasive recovery tank 26 or agitating the abrasive 34 in the abrasive recovery tank 26. 27, the amount of abrasive material sufficiently flowing into the abrasive material supply hole 24 and flowing into the abrasive material supply hole 24 is always fixed, and a certain amount of abrasive material is supplied in a more stable state.
[0049]
  In addition, by adjusting the rotational speed of the abrasive material supply board 20, the number of rotations can be increased and decreased, and the amount of abrasive material supplied to the injection nozzle 11 can be adjusted. For example, a large amount of abrasive is supplied by increasing the rotational speed of the abrasive material supply board 20, and a small amount of abrasive is supplied by reducing the rotational speed of the abrasive material supply board 20. In addition, by maintaining the rotational speed of the abrasive material supply board 20 constant, a constant amount of abrasive material is supplied to the injection nozzle 11 in a constantly stable state, and a fixed amount of abrasive material is continuously and stably supplied from the injection nozzle 11. To the workpiece. Therefore, when the volume of the other abrasive material supply holes 24 or the opening area of the transmission / reception port 22 is constant, the rotational speed of the abrasive material supply board 20 and the abrasive material supply amount are correlated, and this relational expression is obtained. By digitizing the abrasive supply amount at the rotational speed of the abrasive supply board 20, the desired abrasive supply amount can be easily adjusted.
[0050]
  When the abrasive is sprayed from the injection nozzle 11 to the workpiece in the cabinet 51 and the workpiece is blasted, the abrasive becomes a reusable abrasive and a damaged non-reusable abrasive. Both the dust and the like produced by the separation of the abrasive and the workpiece are fed to the cyclone 13 along the air flow through the conduit 52. The cyclone 13 separates the non-reusable abrasive and dust from the reusable abrasive, and the non-reusable abrasive and dust are fed to the dust collector 53 and accumulated in the lower part of the dust collector 53. Then, clean air is discharged from the exhaust fan 54 of the dust collector 53 to the outside air. On the other hand, after the reusable abrasive is stored in the bottom of the abrasive recovery tank 26, the above-described operation is repeated.
[0051]
  Blasting was performed under the following processing conditions using the above-described abrasive supply / injection method and apparatus.
[0052]
[Table 1]

[0053]
  When the supply flow rates of the injection compressed air and the pressurized compressed air were measured by the blasting process, the ratio was 1:17, and a small amount of the injection compressed air was sufficient. Therefore, the abrasive is always injected by a certain amount of compressed compressed air, and the difference between the strong and weak parts is 30cm.² It became 3% or less per unit, and uniform processing was obtained.
[0054]
  4 and 5, a plurality of abrasive supply holes 24 that are continuous in the circumferential direction are formed on the side surface of the abrasive supply board 20 in a parallel manner in two rows in this embodiment. In the vicinity of the outer peripheral edge of the abrasive material supply board 20, a through hole 25 ′ that is bent in a U-shape and communicates with the lower end of the abrasive material injection holes 25, 25 at the lower part of each abrasive material supply hole 24. A through hole 25 ′ is formed on the abrasive supply board 20 so as to open. By opening the through hole 25 ′ on the abrasive material supply board 20, it is possible to completely prevent the abrasive material from dropping from the abrasive material supply hole.
[0055]
  A transmission / reception port 22 is provided in the vicinity of the transmission / reception tube 29 so that the conduit 28 faces the opening, and the transmission / reception port 22 has an insertion hole 22 ′ that is slightly larger than the openings of the abrasive supply holes 24, 24. , 22 ′.
[0056]
  The injection process is substantially the same as the embodiment shown in FIGS.
[0057]
  The abrasive in the abrasive recovery tank 26 dropped and loaded into the abrasive supply hole 24 from the loading port 27 is transferred to the lower part of the transmission / reception port 22, and the injection air 31 is sent from the injection air supply source through the conduit 28. Then, the abrasive in the abrasive supply holes 24, 24 is injected from the abrasive injection holes 25, 25 through the through holes 25 ′ by the injection air 31 through the insertion holes 22 ′, 22 ′ of the transmission / reception port 22 and the transmission / reception tube 29. It is injected into the abrasive supply pipe 30 and blown up. Here, if necessary, the abrasive that has been sent through the sending / receiving tube 29 is jetted from the jet nozzle 11 at a high pressure by the pressurized air 32.
[0058]
  6 and 7 show a configuration in which the abrasive supply board 20 in FIGS. 3 to 5 is rotated in a vertical position, and 26 is an abrasive recovery tank, which is preferably a sealed tank that is a substantially rectangular parallelepiped, An abrasive layer 17 made of abrasive that has flowed into the lower part of the abrasive recovery tank 26 is formed below, and an air layer 18 is formed above the abrasive layer 17.
[0059]
  In this embodiment, a plurality of abrasive supply holes 24 continuous in the circumferential direction are formed in the outer peripheral surface of the abrasive supply board 20 in two rows concentrically, and this 2 is the same as the embodiment shown in FIGS. Through-holes 25 ′ formed by bending the abrasive injection holes 25 below the row of abrasive supply holes 24 in a U-shape are formed so as to open outside the outer peripheral surface of the abrasive supply board 20 in the width direction.
[0060]
  A transmission / reception port 22 is provided so that the conduit 28 faces an opening formed on one outer side of the through hole 25 ′ in the width direction of the outer peripheral surface of the abrasive material supply board 20.
[0061]
  The abrasive material supply board 20 is supported by a rotating shaft 60 so as to be vertically rotatable in the abrasive material layer 17 in the abrasive material recovery tank 26, and an upper part or a part of the upper part of the abrasive material supply board 20 is exposed to the air layer 18. When the abrasive supply hole 24 storing the abrasive collected in the abrasive layer 17 reaches below the transmission / reception port 22, the injection air supplied from the conduit 28 passes through the through hole. The abrasive material injection hole 25 is sent to the abrasive material supply hole 24 through 25 ′, and the abrasive material in the abrasive material supply hole 24 is pressure-injected and sent to the transmission / reception tube 29.
[0062]
【The invention's effect】
  Since the present invention is configured as described above, the following effects can be obtained.
[0063]
  According to the present invention, a fixed amount of abrasive material can be stably and continuously supplied and injected to the injection nozzle even with respect to the abrasive material exhibiting fine powder properties.
[0064]
  The present invention can increase or decrease the amount of abrasive supplied by changing the rotational speed of the abrasive supply board and increasing or decreasing the number of revolutions. Also, the abrasive is continuously supplied according to the rotational speed of the abrasive supply board. In a stable and stable state. Therefore, by freely adjusting the rotational speed of the abrasive supply board, it is possible to reliably and easily adjust the desired abrasive supply amount according to the type of the abrasive. In addition, by digitizing the rotational speed of the abrasive material supply board corresponding to the abrasive material supply amount, the desired abrasive material supply amount, and hence the injection amount, can be easily adjusted.
[0065]
  Alternatively, the number, density, volume, capacity, opening area, or opening area of the transmitting / receiving port of the abrasive supply holes can be changed, and an arbitrarily set amount of abrasive can be supplied and injected.
[0066]
  In the present invention, the abrasive material loaded or collected in the abrasive material supply hole of the abrasive material supply board is injected into the abrasive material supply pipe with the injection air, blown up, and further the abrasive material is injected with the pressurized air to the injection nozzle If the air is supplied and injected, the supply amount of the injection air is smaller than the supply amount of the pressurized air. Therefore, it can be injected with a constant amount of air, and uniform blasting can be performed on the workpiece.
[Brief description of the drawings]
FIG. 1 is a front view of a blasting apparatus equipped with an abrasive material supply / injection device of the present invention.
2 is a cross-sectional view of a main part of the abrasive material supply / injection device of FIG. 1;
3 is a perspective view of a main part of the abrasive material supply / injection device of FIG. 2;
FIG. 4 is a cross-sectional view of an essential part in another embodiment of the abrasive material supply / injection device of the present invention.
5 is a perspective view of the abrasive material supply / injection device of FIG. 4; FIG.
FIG. 6 is a main part perspective view showing a cross section of the main part in still another embodiment of the abrasive material supply / injection apparatus of the present invention.
7 is a perspective view of a main part of the abrasive material supply / injection device of FIG. 6;
FIG. 8 is a front view showing a conventional direct pressure blasting apparatus.
FIG. 9 shows a cross-section of a main part of a conventional abrasive supply device, and particularly shows the state of the abrasive when an abrasive that does not show fine powder properties falls into a feed pipe.
FIG. 10 is a cross-sectional view of a main part of a conventional abrasive supply device, and particularly shows the state of the abrasive when an abrasive exhibiting fine powder properties falls into a feed pipe.
FIG. 11 shows a cross section of a main part of a conventional abrasive supply device, and particularly shows the state of the abrasive when an abrasive exhibiting fine powder properties falls into it.
[Explanation of symbols]
11 Injection nozzle (nozzle body)
12 Abrasive hose
13 Cyclone
14 Nozzle tip
20 Abrasive supply board
21 Rotating motor
22 Transceiver
22 'insertion
23 Holding mouth
24 Abrasive supply hole
25 Abrasive injection hole
25 'through hole
26 Abrasive recovery tank
27 Loading port
28 conduit
29 Tube
30 Abrasive supply pipe
31 Injection (compressed) air
32 Pressurized (compressed) air
34 Abrasive
40 Abrasive recovery tank
41 Dump valve
42 Abrasive pressure tank
43 Abrasive supply port
44 Compressed air supply port for pressing abrasive
45 Abrasive supply adjustment valve
47 Compressed air for pressing abrasive
50 Blasting equipment
51 cabinet
52 conduit
53 Dust collector
54 Ventilator
60 axis of rotation
61 Collection hole
62 Collection rotating plate
63 Port
64 Tube
65 Air layer
70 Abrasive supply device
71 Recovery tank
73 Feed pipe
74 Introduction hole
75 cavity
76 Abrasive

Claims

A horizontally-rotatable abrasive supply board, an abrasive recovery tank having a loading port formed at the bottom facing the upper surface of the abrasive supply board, a transmission / reception pipe communicating with the injection nozzle via the abrasive supply pipe, and A conduit communicating with an injection air supply source is provided to open the transmission / reception tube so as to face the upper surface of the abrasive supply plate, and the conduit formed at the same inner diameter as the transmission / reception tube is opposed to the opening of the transmission / reception tube. A polishing material supply / injection device is provided that faces and opens the lower surface of the polishing material supply board at a position,
A plurality of abrasive material supply holes having upper ends opened on the upper surface of the abrasive material supply board, and a small diameter with respect to the abrasive material supply holes, one end communicating with the lower end of each abrasive material supply hole Forming an abrasive injection hole with the other end opened at the lower surface of the abrasive supply board,
The abrasive was supplied Edition horizontally rotated, said abrasive abrasive recovery tank to the abrasive supplying holes loaded from the loading port of the abrasive recovery tank, in a rotating locus of the abrasive supplying holes, abrasive The loaded abrasive supply hole is disposed between the opening of the transmission / reception tube and the opening of the conduit, and the injection air is introduced into the abrasive injection hole communicating with the conduit at the position, and the abrasive supply hole of injecting injection air from the lower end, direct pressure type continuously abrasive supply and injection method and supplying to the abrasive supplying pipe communicating injected to the injection nozzle from the top.

A horizontally-rotatable abrasive supply board, an abrasive recovery tank having a loading port formed at the bottom facing the upper surface of the abrasive supply board, a transmission / reception pipe communicating with the injection nozzle via the abrasive supply pipe, and An abrasive supply / injection device with a conduit communicating with the injection air supply source is provided,
Abrasive material formed in the abrasive material supply board with a plurality of abrasive material supply holes that open at the upper end on the upper surface thereof and a small diameter with respect to the abrasive material supply hole, and formed at the lower end of each of the abrasive material supply holes. While connecting one end to the injection hole and the abrasive injection hole, and forming a through hole having the other end opened in the upper surface of the abrasive supply board,
The abrasive material supply board is rotated horizontally, and the abrasive material in the abrasive material recovery tank is loaded into the abrasive material supply hole from the loading port of the abrasive material recovery tank. The upper end of the loaded abrasive supply hole communicates with the transmission / reception tube, and the conduit communicates with one of the other end portions of the through-hole communicating with the abrasive supply hole communicated with the transmission / reception tube. Then, a direct pressure type continuous abrasive supply / injection method characterized by injecting injection air from the lower end of the abrasive supply hole, injecting it from the upper end, and supplying it to the abrasive supply pipe communicating with the injection nozzle.

Abrasive supply plate that is vertically rotatable with a part of the outer periphery buried in the abrasive layer in the abrasive collection tank, a transmission / reception tube that communicates with the injection nozzle via the abrasive supply tube, and an injection air supply source Abrasive supply / injection device with a conduit communicating with
A plurality of abrasive supply holes opened on the outer peripheral surface of the abrasive supply board and a diameter smaller than the abrasive supply holes, and each of the abrasive supply holes on the center side of the abrasive supply board A polishing material injection hole that communicates with each of the end portions, one end that communicates with the polishing material injection hole, and a through hole that opens the other end on the outer peripheral surface of the polishing material supply board,
The abrasive was supplied Edition vertically rotated, collecting the abrasive in the abrasive recovery tank to the abrasive supply hole several, in the rotating locus of the abrasive supplying holes, it was collected abrasive said The abrasive material supply hole communicates with the transmission / reception tube, and the conduit communicates with one of the other end portions of the through hole communicated with the abrasive material supply hole communicated with the transmission / reception tube. the injection air injected from the end portion of the abrasive material supply holes at the center side of the supply plate, be fed to the abrasive supplying pipe is injected from the end portion communicating with the injection nozzle in the outer periphery of the abrasive supplying Edition Direct pressure type continuous abrasive supply / injection method.

Supplies the abrasive to the abrasive supplying pipe by the injection air claim 1 any one of the pressurized air for pumping the abrasive and supplying to the abrasive supplying pipe The direct pressure continuous abrasive supply / injection method described.

Rotate the abrasive supply board at a set rotational speed or speed, or change the number, density, arrangement position or number of the abrasive supply holes, volume, capacity, or area of the opening, and arbitrarily set amount The direct pressure type continuous abrasive supply / injection method according to claim 1, wherein the abrasive is supplied and injected.

The direct pressure type continuous abrasive supply / injection method according to claim 1, wherein vibration is applied to the abrasive recovery tank.

The direct pressure type continuous abrasive supply / injection method according to claim 1, wherein the abrasive in the abrasive recovery tank is agitated.

An abrasive supply plate that can be rotated horizontally by a rotation driving means, an abrasive recovery tank having an opening facing the upper surface of the abrasive supply plate and formed at a lower portion, and an injection nozzle through the abrasive supply pipe. A pipe formed with the same inner diameter as the transmission / reception pipe and the transmission / reception pipe communicating with the injection air supply source;
A plurality of abrasive supply holes that open at the upper end on the upper surface of the abrasive supply board, and are formed with a small diameter with respect to the abrasive supply holes, and one end communicates with the lower part of each of the abrasive supply holes. Forming an abrasive injection hole having an end opened at the lower surface of the abrasive supply board in the abrasive supply board;
The pipe is opened facing the upper surface of the abrasive supply board on the rotation trajectory of the upper end opening of the abrasive supply hole, and the polishing pipe is opened on the rotation trajectory of the other end opening of the abrasive injection hole. A direct pressure type continuous abrasive material supply / injection device, wherein the direct pressure type continuous abrasive material supply / injection device is opened at a position facing the lower surface of the material supply board so as to face the opening of the transmission / reception tube.

An abrasive supply plate that can be rotated horizontally by a rotation driving means, an abrasive recovery tank having an opening facing the upper surface of the abrasive supply plate and formed at a lower portion, and an injection nozzle through the abrasive supply pipe. Provide a conduit that communicates with the transmission and reception tubes and the injection air supply source;
A plurality of abrasive supply holes that open at the upper end on the upper surface of the abrasive supply board; and an abrasive injection hole that is formed with a small diameter with respect to the abrasive supply holes and communicates with a lower portion of each of the abrasive supply holes; , One end communicates with the abrasive injection hole, and the other end is formed in the abrasive supply board with an opening on the upper surface of the abrasive supply board, and the conduit is connected to the other end opening of the through hole. To a size that can communicate with each other,
The pipe is opened facing the upper surface of the abrasive supply board on the rotation locus of the upper end opening of the abrasive supply hole, and the conduit is supplied with the abrasive on the rotation locus of the other end opening of the through hole. Direct pressure type continuous abrasive supply / injection device characterized by opening on the upper surface of the board.

An abrasive supply board that is vertically rotatable by a rotation drive means in a state where a part of the outer periphery is buried in an abrasive layer in an abrasive collection tank, a transmission / reception pipe that communicates with an injection nozzle via an abrasive supply pipe, and An abrasive supply / injection device with a conduit communicating with the injection air supply source is provided,
A plurality of abrasive supply holes opened on the outer peripheral surface of the abrasive supply board, and an end portion of each abrasive supply hole on the center side of the abrasive supply board, which is formed with a small diameter with respect to the abrasive supply hole And forming a through hole in the abrasive material supply board, one end communicating with the abrasive material injection hole, and the other end opening in the outer peripheral surface of the abrasive material supply board. Is formed in a size capable of communicating with one of the other end openings of the through hole,
The transmission / reception tube is opened facing the outer peripheral surface of the abrasive material supply board at an upper position exposed from the abrasive material layer on the rotation trajectory of the opening of the abrasive material supply hole, and the conduit is connected to the other end of the through hole. A direct pressure-type continuous abrasive supply / injection apparatus, wherein an opening faces the outer peripheral surface of the abrasive supply board at an upper position exposed from the abrasive layer on the rotation trajectory of the opening.

The direct pressure type continuous abrasive material supply / injection device according to any one of claims 8 to 10, wherein the abrasive material supply pipe communicates with a pressurized air supply source.

The direct pressure type continuous abrasive material supply / injection device according to any one of claims 8 to 11, wherein an inner diameter of the abrasive material injection hole is 1 mm or less.

The abrasive supplying hole, direct pressure type continuously claims 8, 9, and 11 or 12, wherein the forming a plurality of abrasive material supply holes in one or more rows strip annularly draw the same rotation locus respectively Abrasive supply and injection equipment.

Facing the rotation trajectory of the abrasive supply holes formed in a plurality of rows, the transmission / reception pipes and the abrasive supply pipes are provided respectively, and are provided so as to communicate with a plurality of injection nozzles via the abrasive supply pipes. The direct pressure type continuous abrasive supply / injection device according to claim 8, 9, 10, 11, or 12.