CN103557219B - Light bolt fastening piece, its processing method and mould - Google Patents
Light bolt fastening piece, its processing method and mould Download PDFInfo
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- CN103557219B CN103557219B CN201310569562.3A CN201310569562A CN103557219B CN 103557219 B CN103557219 B CN 103557219B CN 201310569562 A CN201310569562 A CN 201310569562A CN 103557219 B CN103557219 B CN 103557219B
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Abstract
The present invention relates to a kind of for aerospace light bolt fastening piece.Its transition part busbar is the smoothed curve in near-sinusoidal, and transition part cone section tilt angle is relatively little, and transition part is relatively short, and structure comparison is reasonable; The hexagonal quincunx twisting hole twisting moment of bolt tail is comparatively large, twisting hole is relatively short, facilitates installation, also reduces the entire length of bolt, thus play the effect of loss of weight; Use the mould of light bolt transition part car-rolling R, enhance the weak part of transition part stress dexterously, the mould of rolling R is simple, cost is low, easy and simple to handle, efficiency is higher; Twisting pin matching used with this light bolt fastening piece, can carry larger twisting moment than hexagonal shaped twisting pin, and further reduces the length of twisting pin, extends the working life of twisting pin.
Description
Technical field
The present invention relates to a kind of for aerospace light bolt fastening piece (also claiming high locked bolts).The invention still further relates to the processing method of the transition part on this bolt fastener and the mould of rolling R.
Background technique
In Aeronautics and Astronautics field, light bolt fastening piece has the features such as lightweight, intensity is high, fatigue behaviour is good due to it, is applied to the connection of housing construction and vitals in large quantities.
The R & D and manufacture starting of western developed country in this field comparatively early.At present, mainly contain French LiSi, the SPS of the U.S. and U.S. aluminium, there is respective method in its each family to light bolt fastening piece form structure and processing technology, and defines the patent of some comparative maturities.Huck International, Inc. under aluminium as beautiful in the U.S., apply for that name is called " lightweight threaded fastener and rolling die ", the patent No. is the patent of 99812743 on October 5th, 1999, the main feature of its bolt fastener is: " screw thread blank has a major diameter bar portion and a smaller diameter rods portion, and smaller diameter rods portion is smoothly connected to minor diameter by a transition part from major diameter; The cone section of transition part extends a tilt angle relative to the straight line of the axis perpendicular to bolt, and tilt angle, between 25 ° ~ 35 °, can adopt 25 ° ~ 55 ° in some cases ".The advantage of this patent is, ending≤the 1.0P of light bolt fastening piece, deficiency be the tilt angle of the cone section of transition part between 25 ° ~ 35 °, even can adopt the over-designed of 25 ° ~ 55 °, the length of light bolt fastening piece is relatively also long, and loss of weight is relatively little.
At home, space flight Seiko (Tianjin), 694 factories, 3117 factories, 3536 factories, 625 Suo Deng fastening piece manufacturers are mainly contained.Wherein, space flight Seiko (Tianjin) has applied for " high locked bolts of with groove ending by name on July 10th, 2012, its processing method and roller ", the patent No. is the patent of 201210236979, its main feature is: " a kind of high locked bolts of with groove ending, comprise nut, polished rod section, thread section and ending section, it is characterized in that: described ending Duan Weiyi groove, the circumferential surface of described groove is a conical surface, the small end of conical surface is connected with polished rod section, the large end of conical surface is connected with thread section, described groove and polished rod section, the joint of thread section is arc surface transition and connects, the groove of ending section adopts roller roll extrusion to form ".And on April 21st, 2008, Guizhou space flight Seiko (i.e. 3536 factories) has applied for that " high locked bolts " by name, the patent No. are the patent of 200820300593, its main feature is: " a kind of high locked bolts; its bolt head, screw rod and thread section are formed, and it is characterized in that: be provided with interior hexagonal hole in the end of thread section ".
In sum, home and abroad fastening piece company is mainly studied around the processing method of the structure of light bolt changeover portion, changeover portion, processing mold and afterbody twisting hole thereof etc. and has applied for Patents, but is all faced with the problem (as Fig. 1) of the design of light bolt ending and processing optimization thereof at present.
At present, China's Aero-Space are in the flourish stage, huge to the needs of light bolt fastening piece, and import is expensive, there is made in Great Britain and metric standards transition problem, and the delivery cycle cannot ensure.For meeting the requirement of aerospace development and production domesticization, improving and optimizating in the urgent need to us or designing novel fastening piece, with the blockade on new techniques of breaks through foreign.
Summary of the invention
The present invention aim to provide a kind of rational in infrastructure, be easy to install, fully reach the light bolt fastening piece of loss of weight object, the transition part of this fastening piece is relatively short, and cone section tilt angle is relatively little, and transition part structure is more reasonable; The twisting hole twisting moment of bolt tail is comparatively large, twisting hole is relatively short, facilitates installation, reduces the entire length of bolt, thus play the effect of loss of weight.Invention also provides the mould of light bolt transition part car-rolling R, enhance the weak part of transition part stress, the mould structure of car-rolling R is simple and direct, cost is low, easy and simple to handle, efficiency is high.Present invention also offers and the matching used setting tool of this light bolt fastening piece.
One of technical measures that the present invention adopts are: by the bus of light bolt transition part, and be designed to the smoothed curve in near-sinusoidal, corresponding adjustment has been carried out at the cone section tilt angle of transition part, and concrete technological scheme is as follows:
Light bolt fastening piece, is made up of bolt head and screw rod, and described bolt head can be tack or countersunk head, also goes for the bolt of any nose shape; Described screw rod comprise an one end start from bolt head have cylindrical smooth shank portions polished rod section, one be connected to the relatively short transition part between described polished rod section and thread section at screw axial end with externally threaded thread section and smooth transition.The diameter of described polished rod section is greater than the diameter of thread section, and described transition part starts from the transition trend that large diameter polished rod Duan Bingcheng external diameter reduces gradually and is finally connected with the root of the thread section of minor diameter.
Described transition part is formed by connecting by the first segmental arc, the second segmental arc, inner cone section, the 3rd segmental arc, rear cone section head and the tail rounding off, described first segmental arc has relatively large radius, its end starting from polished rod section also radially extends to gradually and is connected with second segmental arc with small radii, be smoothly connected by the inner cone section be cut between two segmental arcs public between described second segmental arc and the 3rd segmental arc, the end of described 3rd segmental arc gradually outward radial extends and is connected with rear cone section, and described rear cone section is connected to the abutting end of thread section via the round-corner transition of routine.
Described inner cone section or its line stretcher and perpendicular to bolt axis to straight line between angle be inner cone section tilt angle At, the angular range of described inner cone section tilt angle At is 10 °≤At < 25 °;
Described rear cone section or its line stretcher and be parallel to bolt axis to straight line between angle be rear cone section tilt angle A0, the angular range of described rear cone section tilt angle A0 is 15 °≤A0≤45 °.
Two of the technical measures that the present invention adopts are: redesign the twisting hole of bolt tail, six side's twisting holes in routine are changed into a kind of interior hexagonal plum blossom twisting hole.
The bolt tail of existing light bolt fastening piece is provided with interior six side's twisting holes, and its degree of depth and shape can not to be above standard value on the impact of bolt strength performance, and require can not produce skidding when reaching mounting torque.Interior six side's twisting holes of this routine must reach certain degree of depth guarantee, and it carries enough twisting moment, and this just will inevitably increase the length of thread section and the weight of overall bolt; In order to can reduce the reach of bolt, reach the object of bolt loss of weight as far as possible, original interior six side's twisting hole Curve guide impeller are interior hexagonal plum blossom twisting hole by the present invention, concrete structure is outstanding, be distributed in circumferencial direction six smooth arcuation clamping lobes, the interior hexagonal plum blossom twisting hole with this arcuation clamping lobe can in the larger twisting moment of relatively short axial depth carrying, so reduce bolt thread section and twisting pin length, reach bolt loss of weight and extend working life of twisting pin.
Three of the technical measures that the present invention adopts are: light bolt transition part has the weak part of a stress, requires to be cold working to meet physical property.For this reason, the invention provides a kind of processing method of light bolt transition part, utilize turning class lathe to carry out turning, then utilize conventional technique for rolling to carry out rolling to transition part, the processing technology of rolling after namely adopting first car to transition part, enhances the weak part of transition part stress.Roll the mould in processing technology after being applied to first car, comprise the roller 10 being installed on the anti-lathe tool 8 on knife bar 6 by screw 7 and being installed on by bearing 11 and roller bearing 12 on handle of a knife 13.Utilize turning class lathe to clamp light bolt 9, the size that first after anti-car R, roll extrusion R requires to cold working, then enhance transition part stress weakness effectively.The mould of this rolling R relative to tens thousand of unit easily concerning crowded edging wheel, structure is simple, cost is low, easy and simple to handle, efficiency is higher.
Four of the technical measures that the present invention adopts: provide the matching used setting tool in hexagonal plum blossom twisting hole in light bolt afterbody a kind of and of the present invention, this setting tool has mounting head 14, twisting bar 15 and twisting 16, described twisting 16 hexagonal structure changing routine are hexagonal plum-shaped structure, larger twisting moment can be carried than hexagonal shaped twisting pin, and further reduce the length of twisting pin, extend the working life of twisting pin.
Accompanying drawing explanation
Fig. 1 is light bolt structural representation;
Fig. 2 is light bolt transition part bus and transition part inner cone section Zt tilt angle At and rear cone section ZO tilt angle A0 schematic diagram;
The structural representation of Fig. 3-4 to be light bolt afterbody twisting holes be interior hexagonal plum blossom hole;
Fig. 5 is that the requirement of light bolt transition part is cold working to the enlarged diagram meeting physical property part;
Fig. 6 is the mould schematic diagram of light bolt transition part car-rolling R;
Fig. 7-8 is structural representations of the quincunx twisting pin of hexagonal.
Embodiment
Referring to accompanying drawing, provide the specific embodiment of the present invention, be used for being further described formation of the present invention.
Embodiment 1
Below in conjunction with accompanying drawing, the invention will be further elaborated.As shown in Figure 1, the invention provides a kind of light bolt fastening piece, be made up of bolt head 1, polished rod section 2, transition part 3 and thread section 4.Described transition part 3 starts from large diameter polished rod section 2 and the transition trend reduced gradually in external diameter is finally connected with the root of the thread section 4 of minor diameter.The present invention is by the bus of light bolt transition part 3 (namely forming the transition wire at the top of complete thread) from the proximal end of maximum grip length polished rod section to thread section, be designed to the smoothed curve in near-sinusoidal, by the first segmental arc L1, second segmental arc L2, inner cone section Zt, 3rd segmental arc L3, rear cone section ZO head and the tail rounding off is formed by connecting, described first segmental arc L1 has relatively large radius, its end starting from polished rod section also radially extends to gradually and is connected with the second segmental arc L2 with small radii, be smoothly connected by the inner cone section Zt be cut between two segmental arcs public between described second segmental arc L2 and the 3rd segmental arc L3, the end of described 3rd segmental arc L3 gradually outward radial extends and is connected with rear cone section ZO, described rear cone section ZO is connected to the abutting end of thread section via the round-corner transition of routine.The inner cone section Zt tilt angle At(inner cone section Zt of transition part 3 or its line stretcher and perpendicular to bolt axis to straight line between angle) be 10 °, after rear cone section ZO tilt angle A0(the section of cone ZO or its line stretcher and be parallel to bolt axis to straight line between angle) be 15 °, as shown in Figure 2.When R2, R3 and R4 size one timing, At is excessive or A0 too small then transition part 3 axial length is relatively long, is unfavorable for the object reducing bolt length, reach bolt loss of weight; The bus inner cone section Zt of the too small transition part of At 3 can not smoothly be shaped, and easily produces folding, the defect such as flange and crackle after the bus of the excessive transition part of A0 3 during the section of cone ZO rolling screw thread.
The schematic diagram of to be light bolt afterbody twisting holes 5 be in Fig. 3 ~ 4 interior hexagonal plum blossom hole.Existing light bolt (no matter home and abroad) afterbody twisting hole is interior hexagonal hole, because its twisting moment is relatively little, easily skid, therefore interior hexagonal hole is relatively dark, has certain influence to the bearing strength of light bolt.It is interior hexagonal plum blossom hole that light bolt afterbody twisting hole is designed 5, concrete structure is outstanding, be distributed in circumferencial direction six smooth arcuation clamping lobes, the interior hexagonal plum blossom twisting hole with this arcuation clamping lobe can in the larger twisting moment of relatively short axial depth carrying, so reduce bolt thread length and twisting pin length, reach bolt loss of weight and extend working life of twisting pin.
Fig. 5 is that the requirement of light bolt transition part is cold working to the enlarged diagram meeting physical property part, and also namely this transition part has the weak part of a stress, requires to be cold working to meet physical property.For this reason, the invention provides a kind of mould carrying out car-rolling R technique at light bolt transition part, as shown in Figure 6, be made up of knife bar 6, screw 7, anti-lathe tool 8, roller 10, bearing 11, roller bearing 12 and handle of a knife 13.Utilize turning class lathe to clamp light bolt 9, the size that first after anti-car R, roll extrusion R requires to cold working, then enhance transition part stress weakness effectively.The mould of this rolling R relative to tens thousand of unit easily concerning crowded edging wheel, structure is simple, cost is low, easy and simple to handle, efficiency is higher.
Fig. 7 ~ 8 are schematic diagram of the quincunx twisting pin of hexagonal, with the matching used twisting pin in hexagonal plum blossom twisting hole in this light bolt.Usual twisting pin is installed on light bolt setting tool, and concrete structure is outstanding, be distributed in circumferencial direction six smooth arcuation clamping lobes, when installing light bolt fastening piece, being used for fixing light bolt and not rotated.This hexagonal is quincunx, and twisting pin can carry larger twisting moment than hexagonal shaped twisting pin, and further reduces the length of twisting pin, extends the working life of twisting pin.
Embodiment 2
The difference of the present embodiment and embodiment 1 is
Described inner cone section or its line stretcher and perpendicular to bolt axis to straight line between angle be inner cone section tilt angle At, its angular range is 24 °; Described rear cone section or its line stretcher and be parallel to bolt axis to straight line between angle be rear cone section tilt angle A0, its angular range is 45 °.
Embodiment 3
The difference of the present embodiment and embodiment 1 is
Described inner cone section or its line stretcher and perpendicular to bolt axis to straight line between angle be inner cone section tilt angle At, its angular range is 15 °; Described rear cone section or its line stretcher and be parallel to bolt axis to straight line between angle be rear cone section tilt angle A0, its angular range is 25 °.
In sum, the invention provides four kinds of technical measures, make cone section tilt angle relatively little, transition part is relatively short, and reduce bolt length, transition part is the smoothed curve of near-sinusoidal, and structure is comparatively reasonable; The hexagonal quincunx twisting hole twisting moment of bolt tail is comparatively large, twisting hole is relatively short, facilitates installation, also reduces the entire length of bolt, thus play the effect of loss of weight; The mould of light bolt transition part car-rolling R, enhance the weak part of transition part stress dexterously, the mould of rolling R is simple, cost is low, easy and simple to handle, efficiency is higher; Twisting pin matching used with this light bolt fastening piece, can carry larger twisting moment than hexagonal shaped twisting pin, and further reduces the length of twisting pin, extends the working life of twisting pin.
Claims (5)
1. light bolt fastening piece, is made up of bolt head, polished rod section, transition part and thread section, it is characterized in that: the busbar of described transition part is the smoothed curve in near-sinusoidal, transition part
inner cone section Zt tilt anglethe angular range of At is 10 °≤At < 25 °, transition part
rear cone section ZO inclines oblique anglethe angular range of A0 is 15 °≤A0≤45 °;
Described transition part is formed by connecting by the first segmental arc, the second segmental arc, inner cone section, the 3rd segmental arc, rear cone section head and the tail rounding off, described first segmental arc has relatively large radius, its end starting from polished rod section also radially extends to gradually and is connected with second segmental arc with small radii, be smoothly connected by the inner cone section be cut between two segmental arcs public between described second segmental arc and the 3rd segmental arc, the end of described 3rd segmental arc gradually outward radial extends and is connected with rear cone section, and described rear cone section is connected to the abutting end of thread section via the round-corner transition of routine;
Described transition part
inner cone section tilt angleat refer to perpendicular to bolt axis to straight line and angle between transition part inner cone section or its line stretcher;
Described transition part
rear cone section tilt anglea0 refer to be parallel to bolt axis to straight line and angle between the rear cone section of transition part or its line stretcher.
2. light bolt fastening piece as claimed in claim 1, is characterized in that: the twisting hole of described thread section afterbody is designed to
interior hexagonal plum blossom hole;
Described
interior hexagonal plum blossom holeconcrete structure is outstanding, be distributed in circumferencial direction six smooth arcuation clamping lobes.
3. light bolt fastening piece as claimed in claim 1, is characterized in that described bolt head is the flat globular model of plane or the countersunk head shape of band tapering.
4. the method for the transition part of a processing light bolt fastening piece as claimed in claim 1, the processing technology of rolling after it is characterized in that adopting first car, namely turning class lathe is first utilized to carry out turning, then utilize conventional technique for rolling to carry out rolling to transition part, make it to be cold working to the weak part of transition part stress to meet its physical property requirements.
5. be applied to a mould for method described in claim 4, it is characterized in that comprising the anti-lathe tool be installed on by screw on knife bar, and be installed on the roller on handle of a knife by bearing and roller bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310569562.3A CN103557219B (en) | 2013-11-13 | 2013-11-13 | Light bolt fastening piece, its processing method and mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310569562.3A CN103557219B (en) | 2013-11-13 | 2013-11-13 | Light bolt fastening piece, its processing method and mould |
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| Publication Number | Publication Date |
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| CN103557219A CN103557219A (en) | 2014-02-05 |
| CN103557219B true CN103557219B (en) | 2015-09-30 |
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| CN201310569562.3A Active CN103557219B (en) | 2013-11-13 | 2013-11-13 | Light bolt fastening piece, its processing method and mould |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105563419B (en) * | 2015-12-31 | 2017-08-08 | 中国电子科技集团公司第十八研究所 | A kind of battery pack upset attaching/detaching apparatus |
| US10641307B2 (en) * | 2017-02-20 | 2020-05-05 | The Boeing Company | Radiused lead-in for interference fit fasteners |
| CN109236831B (en) * | 2018-10-23 | 2022-03-22 | 航天精工股份有限公司 | Bolt with transition area and transition structure thereof |
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| JPS63500196A (en) * | 1985-04-29 | 1988-01-21 | ハツク マニユフアクチユアリング カンパニ− | Expandable anchor bolt |
| US6149363A (en) * | 1998-10-29 | 2000-11-21 | Huck International, Inc. | Lightweight threaded fastener and thread rolling die |
| US6702684B2 (en) * | 2002-04-05 | 2004-03-09 | Huck International, Inc. | Method of designing and manufacturing a swage type fastener |
| DE20311466U1 (en) * | 2003-07-25 | 2003-11-13 | Textron Verbindungstechnik GmbH & Co. oHG, 56567 Neuwied | Undercut screw between thread and head |
| US7225710B2 (en) * | 2005-05-27 | 2007-06-05 | Synthes Gmbh | Combination driver and combination fastener |
| CN201180723Y (en) * | 2008-04-21 | 2009-01-14 | 贵州航天精工制造有限公司 | High-lock bolt |
| DE202009003471U1 (en) * | 2009-03-11 | 2009-05-20 | Acument Gmbh & Co. Ohg | screw |
| US8291795B2 (en) * | 2010-03-02 | 2012-10-23 | Phillips Screw Company | Fastener system with stable engagement and stick fit |
| CN201650979U (en) * | 2010-04-19 | 2010-11-24 | 鹏驰五金制品有限公司 | Socket head cap screw with plum hole |
| FR2967735B1 (en) * | 2010-11-24 | 2012-12-14 | Lisi Aerospace | END FIXING MEMBER IN A THREADED END TERMINAL, MALE ELEMENT, MANEUVER TOOL, AND SIZE COMPRISING SUCH A MALE MEMBER. |
| CN102562755A (en) * | 2010-12-28 | 2012-07-11 | 鸿富锦精密工业（深圳）有限公司 | Fastener, driving piece matched with same and punch for forming fastener |
| CN202140397U (en) * | 2011-07-12 | 2012-02-08 | 航天精工有限公司 | High anti-fatigue bolt |
| CN202360548U (en) * | 2011-09-14 | 2012-08-01 | 中国航空工业集团公司西安飞机设计研究所 | Threaded fastener structure |
| CN102748360A (en) * | 2012-07-10 | 2012-10-24 | 航天精工有限公司 | High-locking bolt provided with groove end as well as processing method and roller thereof |
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Denomination of invention: Lightweight bolt fastener, its processing method and die Effective date of registration: 20220804 Granted publication date: 20150930 Pledgee: Yantai Branch of China Merchants Bank Co.,Ltd. Pledgor: ORIENTAL BLUESKY TITANIUM TECHNOLOGY Co.,Ltd. Registration number: Y2022980011951 |
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Denomination of invention: Lightweight bolt fastener, its processing method and die Effective date of registration: 20220831 Granted publication date: 20150930 Pledgee: Yantai Branch of China Merchants Bank Co.,Ltd. Pledgor: ORIENTAL BLUESKY TITANIUM TECHNOLOGY Co.,Ltd. Registration number: Y2022980014130 |