JPH0116889B2 - - Google Patents
Info
- Publication number
- JPH0116889B2 JPH0116889B2 JP8060682A JP8060682A JPH0116889B2 JP H0116889 B2 JPH0116889 B2 JP H0116889B2 JP 8060682 A JP8060682 A JP 8060682A JP 8060682 A JP8060682 A JP 8060682A JP H0116889 B2 JPH0116889 B2 JP H0116889B2
- Authority
- JP
- Japan
- Prior art keywords
- stabilizer
- boron
- hardness
- quenching
- carbon steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000003381 stabilizer Substances 0.000 claims description 18
- 238000005496 tempering Methods 0.000 claims description 10
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 9
- 239000010962 carbon steel Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 22
- 238000010791 quenching Methods 0.000 description 12
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 10
- 229910052796 boron Inorganic materials 0.000 description 10
- 230000000171 quenching effect Effects 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 1
- 101100381534 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) BEM2 gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/14—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes wear-resistant or pressure-resistant pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/13—Torsion spring
- B60G2202/135—Stabiliser bar and/or tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/012—Hollow or tubular elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/40—Constructional features of dampers and/or springs
- B60G2206/42—Springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/40—Constructional features of dampers and/or springs
- B60G2206/42—Springs
- B60G2206/427—Stabiliser bars or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/80—Manufacturing procedures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vehicle Body Suspensions (AREA)
- Springs (AREA)
- Heat Treatment Of Articles (AREA)
Description
本発明は、素材として鋼管を用いた中空スタビ
ライザの製造方法に関する。
車輌の懸架機構部に設けられるスタビライザは
従来は一般に鋼製中実材を素材としていたが、近
時は車体の軽量化を図る目的で鋼管を用いる傾向
にある。
しかして従来は主として中炭素鋼系またはばね
鋼（SUP）系等の高価な特殊鋼素材が用いられ、
かつ加熱成形後に油焼入れおよび焼もどしが施さ
れているため、素材および焼入油が共に高価であ
り、また、オイルミストや高温油の飛散の防止か
ら防火対策に至るまで、作業環境ならびに安全面
等に多くの問題点があつた。
本発明は上記事情にもとづきなされたものでそ
の目的とするところは、スタビライザとして実用
上充分な強度をもつ軽量なスタビライザを低コス
トで提供でき、しかも製造工程において作業環境
や安全面の管理が簡単ですみ、省資源および省エ
ネルギー化に寄与できる中空スタビライザの製造
方法を提供することにある。
すなわち本発明者らは、スタビライザとして所
望の品質水準を維持するという条件下で、素材お
よび熱処理方法等について種々実験、研究を重
ね、特に冷間加工性をも考慮して成形時における
表面疵等の欠陥の発生を防止し得るとともに、焼
入れ硬さや焼割れ等の問題点を解決し得るものと
して、スタビライザの素材としてはボロンを添加
した機械構造用炭素鋼鋼管（例えばSTKM13A〜
15A相当材）またはボロンを添加した一般構造用
炭素鋼鋼管（例えばSTK41、51相当材）を用い
ることに着目し、この素材を所定の形状に曲げ加
工し、そののち水焼入れを行ない、そののち硬さ
がHRC36ないし43の範囲となるように焼もどすと
いう製造方法を創出したものである。
以下に本発明の一実施例を図面を参照して説明
する。スタビライザ素材としては、次表（第１
表）に示す素材Ａまたは素材Ｂ、すなわち微量の
ボロンを添加したSTKM13A相当材、または微量
のボロンを添加したSTKM15A相当材を用いた。
なおSTKM13AおよびSTKM15Aは、ともに機械
構造用炭素鋼鋼管（JIS―G3445）である。
The present invention relates to a method of manufacturing a hollow stabilizer using a steel pipe as a material. Stabilizers installed in the suspension mechanism of a vehicle have traditionally been made of solid steel, but recently there has been a trend toward using steel pipes to reduce the weight of the vehicle body. However, in the past, expensive special steel materials such as medium carbon steel or spring steel (SUP) were mainly used.
In addition, since oil quenching and tempering are performed after heat forming, both the material and the quenching oil are expensive, and the work environment and safety are affected, from preventing oil mist and high-temperature oil scattering to fire prevention measures. There were many problems with this. The present invention has been made based on the above circumstances, and its purpose is to provide a lightweight stabilizer with sufficient strength for practical use as a stabilizer at a low cost, and to easily manage the working environment and safety aspects in the manufacturing process. The object of the present invention is to provide a method for manufacturing a hollow stabilizer that can contribute to resource and energy saving. In other words, under the condition of maintaining the desired quality level as a stabilizer, the present inventors have conducted various experiments and research on materials, heat treatment methods, etc., and have particularly taken cold workability into account to prevent surface flaws etc. during molding. Carbon steel tubes for mechanical structures with boron added (for example, STKM13 A ~
We focused on using general structural carbon steel pipes (for example, STK41 and 51 equivalent materials) with added boron (e.g., STK41 and 51 equivalent materials), bent this material into a specified shape, and then water-quenched it. A manufacturing method was created in which the steel was later tempered to a hardness in the range of H R C36 to 43. An embodiment of the present invention will be described below with reference to the drawings. Stabilizer materials are listed in the table below (No. 1).
Material A or material B shown in Table 1), that is, a material equivalent to STKM13 A to which a trace amount of boron was added, or a material equivalent to STKM15 A to which a trace amount of boron was added was used.
Note that STKM13 A and STKM15 A are both carbon steel pipes for mechanical structures (JIS-G3445).
【表】
上記組成の素材Ａ、Ｂからなる外径22mm、肉厚
2.6mmの管と、外径25mm、肉厚3.0mmの管を所定の
スタビライザ形状に曲げ成形し、そののち常温水
および温水によりそれぞれ撹拌状態および静止状
態において水焼入れしたところ、焼入れ後の硬さ
（HRＣ）は、第２表に示すものが得られた。
なお、この第２表に関する試料数は12で、測定
点は横断面において周方向に等間隔に各12点ずつ
設定した。[Table] Made of materials A and B with the above composition, outer diameter 22 mm, wall thickness
A 2.6 mm tube, an outer diameter of 25 mm, and a wall thickness of 3.0 mm were bent and formed into the specified stabilizer shape, and then water quenched with room temperature water and hot water in an agitated state and a static state, respectively.The hardness after quenching was determined. (H R C) shown in Table 2 was obtained. The number of samples in Table 2 was 12, and 12 measurement points were set at equal intervals in the circumferential direction on the cross section.
【表】
そして上記焼入れ後に、焼もどし温度365℃〜
380℃で適正時間焼もどしを施した結果の硬さ
（HRＣ）は34〜37であり、特にHRC36以上におい
てスタビライザとして実用に充分耐えられる耐疲
れ強さを発揮できることが判明した。
第１図は上記製造方法で得られたスタビライザ
の試作品について、焼もどし後の硬さ（HRＣ）
と疲労強度との関係を示したものであり、疲労試
験条件はスタビライザの設計応力として一般的な
値σ0＝±50、±60、±70Kgｆ／mm2に設定した。この
図から知れるように、焼もどし後の硬さをHRC36
〜43とした場合、特にHRC40前後においてスタビ
ライザとして実用上充分な強度が得られることが
判る。なおHRＣが43を超えると靭性が不足する
などして耐疲れ強さに問題がでてくる。
また、上記素材ＡおよびＢ（いずれもボロン添
加有り）に水焼入れした場合と、一般の
STKM13AおよびSTKM15A（ともにボロン添加な
し）を水焼入れした場合とについて、硬さのばら
つきを第２図に比較して示す。同図から明らかな
ように、ボロンを添加した素材Ａ、Ｂの方が硬さ
のばらつきが少なく、きわめて良好な結果が得ら
れた。なお、同図に示すデータは外径22mm、肉厚
2.6mmの管につき、横断面において周方向４等分
位置の測定値を用いた。
更に、第３図に疲労強度を比較して示すよう
に、本発明方法によつて製造したスタビライザの
特性ａは、SUP9に油焼入れおよび焼もどしを施
した従来のものの特性ｂと実質的に同等である。
なお、同図ｃは一般のSTKM15A（ボロン添加な
し）に水焼入れおよび焼もどしをしたもの、同図
ｄは同素材の焼入れ前におけるそれぞれの特性を
示している。
なお上記実施例ではスタビライザ素材としてボ
ロンを添加したSTKM13AまたはSTKM15A相当
材を用いたが、その他の機械構造用炭素鋼鋼管、
例えばSTKM14Aにボロンを添加したものを用い
てもよい。またJIS―G3444で定められている一
般構造用炭素鋼鋼管、例えばSTK41（Ｃ％…0.25
以下）、あるいはSTK51（Ｃ％…0.30以下）など
にボロンを添加したものを用いてもよい。
本発明は前記したように、ボロンを添加した機
械構造用炭素鋼鋼管または一般構造用炭素鋼鋼管
を所定のスタビライザ形状に曲げ成形したのち水
焼入れを行ない、そののち硬さがHRC36ないし43
の範囲となるように焼もどしを行なうようにした
ものである。従つて、素材としてばね鋼系のよう
な高価な特殊鋼を使用する必要がなく、安価に容
易に入手できる低炭素鋼等を用いることができ
る。また、上記素材は溶接した場合の溶接部の品
質安定性が良好であるから、例えば電縫管などを
用いた場合にも安定した品質を得ることができ
る。
また、水焼入れによるものであるから、焼入油
も不要であるなど材料面で省資源および省エネル
ギー化に寄与し得るとともにコストを大幅に節減
することができる。また、焼入油を使用しないの
でオイルミストや高温油の飛散等の対策が不要で
ありながら良好でかつ安全な作業環境が得られ、
かつ廃油処理や防火対策等についても管理面の簡
素化が可能である。しかも、得られる製品は合金
鋼に油焼入れを施した従来品に比して実質的に同
等な疲労強度を備えており、かつ焼入れ硬さのバ
ラツキが小さいことから判るように品質水準が安
定しているなど、実用上充分な強度をもつ軽量な
スタビライザを低コストで提供できるという大き
な効果がある。[Table] After the above quenching, the tempering temperature is 365℃ ~
The hardness (H R C) as a result of tempering at 380° C. for an appropriate period of time was 34 to 37, and it was found that especially at H R C of 36 or higher, fatigue resistance sufficient to withstand practical use as a stabilizer could be exhibited. Figure 1 shows the hardness (H R C) after tempering of the stabilizer prototype obtained by the above manufacturing method.
The fatigue test conditions were set to σ 0 =±50, ±60, ±70 Kgf/mm 2 , which are common values for the design stress of stabilizers. As can be seen from this figure, the hardness after tempering is H R C36
43, it can be seen that practically sufficient strength as a stabilizer can be obtained, especially around H R C40. Note that when H R C exceeds 43, problems arise in fatigue resistance due to insufficient toughness. In addition, when the above materials A and B (both with boron addition) are water quenched, and when the general
Figure 2 shows a comparison of the hardness variations of STKM13 A and STKM15 A (both without boron addition) when water quenched. As is clear from the figure, materials A and B to which boron was added had less variation in hardness, and very good results were obtained. The data shown in the same figure is for an outer diameter of 22 mm and wall thickness.
For a 2.6 mm tube, measured values at four equal circumferential positions in the cross section were used. Furthermore, as shown in Figure 3 for comparison of fatigue strength, the characteristic a of the stabilizer manufactured by the method of the present invention is substantially equivalent to the characteristic b of the conventional stabilizer made by oil-quenching and tempering SUP9. It is.
Note that Figure c shows general STKM15 A (without boron addition) after water quenching and tempering, and Figure d shows the characteristics of the same material before quenching. In the above examples, boron-added material equivalent to STKM13 A or STKM15 A was used as the stabilizer material, but other carbon steel pipes for machine structures,
For example, STKM14 A to which boron is added may be used. In addition, carbon steel pipes for general structures specified by JIS-G3444, such as STK41 (C%...0.25
(below) or STK51 (C%...0.30 or less) to which boron is added may also be used. As described above, the present invention involves bending and forming boron-added carbon steel pipes for machine structures or carbon steel pipes for general structures into a predetermined stabilizer shape, and then water-quenching the pipes, and then reducing the hardness to H R C36 to 43.
The tempering is done so that the hardness is within the range of . Therefore, there is no need to use expensive special steel such as spring steel as the material, and low carbon steel or the like that is easily available at low cost can be used. Further, since the above-mentioned materials have good quality stability of the welded portion when welded, stable quality can be obtained even when using, for example, an electric resistance welded pipe. In addition, since water quenching is used, quenching oil is not required, which contributes to resource and energy conservation in terms of materials, and can significantly reduce costs. In addition, since no quenching oil is used, there is no need to take measures against oil mist or high-temperature oil scattering, and a good and safe working environment can be achieved.
In addition, management aspects such as waste oil treatment and fire prevention measures can be simplified. Moreover, the resulting product has substantially the same fatigue strength as conventional products made of oil-hardened alloy steel, and its quality level is stable, as evidenced by the small variation in hardness. This has the great effect of providing a lightweight stabilizer with sufficient strength for practical use at a low cost.
第１図は焼もどし後の硬さと疲労強度との関係
を示す図、第２図は水焼入れ後の硬さのばらつき
の程度を示す図、第３図は各素材の疲労強度を比
較して示す図である。
Figure 1 shows the relationship between hardness and fatigue strength after tempering, Figure 2 shows the degree of variation in hardness after water quenching, and Figure 3 compares the fatigue strength of each material. FIG.
Claims (1)
は一般構造用炭素鋼鋼管を所定の形状に曲げ成形
し、そののち水焼入れを行ない、そののち硬さが
HRC36ないし43の範囲となるように焼もどしを行
なうことを特徴とする中空スタビライザの製造方
法。1 Boron-added carbon steel pipes for machine structures or carbon steel pipes for general structures are bent into a specified shape, then water quenched, and then hardened.
A method for manufacturing a hollow stabilizer, characterized by tempering to a H R C36 to C43 range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8060682A JPS58197218A (en) | 1982-05-13 | 1982-05-13 | Manufacture of hollow stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8060682A JPS58197218A (en) | 1982-05-13 | 1982-05-13 | Manufacture of hollow stabilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58197218A JPS58197218A (en) | 1983-11-16 |
| JPH0116889B2 true JPH0116889B2 (en) | 1989-03-28 |
Family
ID=13722985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8060682A Granted JPS58197218A (en) | 1982-05-13 | 1982-05-13 | Manufacture of hollow stabilizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58197218A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016158408A1 (en) * | 2015-03-31 | 2016-10-06 | 日本発條株式会社 | Method for manufacturing spring for suspension device, and spring for suspension device |
| JP2020076154A (en) * | 2020-01-07 | 2020-05-21 | 日本発條株式会社 | Method for producing spring for suspension |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60145324A (en) * | 1984-01-10 | 1985-07-31 | Toyota Motor Corp | Heat treatment of flywheel |
| JPH0681078A (en) * | 1992-07-09 | 1994-03-22 | Sumitomo Metal Ind Ltd | Low yield ratio high strength steel and its production |
| JP5631972B2 (en) * | 2010-03-08 | 2014-11-26 | 愛知製鋼株式会社 | Solid stabilizer, steel material for solid stabilizer, and method for producing solid stabilizer |
-
1982
- 1982-05-13 JP JP8060682A patent/JPS58197218A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016158408A1 (en) * | 2015-03-31 | 2016-10-06 | 日本発條株式会社 | Method for manufacturing spring for suspension device, and spring for suspension device |
| JP2016191121A (en) * | 2015-03-31 | 2016-11-10 | 日本発條株式会社 | Manufacturing method of spring for suspension device and spring for suspension device |
| JP2020076154A (en) * | 2020-01-07 | 2020-05-21 | 日本発條株式会社 | Method for producing spring for suspension |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58197218A (en) | 1983-11-16 |
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