JP2000317738A - Manufacture of stainless steel bolt - Google Patents

Manufacture of stainless steel bolt

Info

Publication number
JP2000317738A
JP2000317738A JP11128059A JP12805999A JP2000317738A JP 2000317738 A JP2000317738 A JP 2000317738A JP 11128059 A JP11128059 A JP 11128059A JP 12805999 A JP12805999 A JP 12805999A JP 2000317738 A JP2000317738 A JP 2000317738A
Authority
JP
Japan
Prior art keywords
bolt
heat treatment
stainless steel
screw
round bar
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.)
Granted
Application number
JP11128059A
Other languages
Japanese (ja)
Other versions
JP4448208B2 (en
Inventor
Shigenobu Hamanaka
重信 濱中
Original Assignee
Hamanaka Nut Kk
濱中ナット株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hamanaka Nut Kk, 濱中ナット株式会社 filed Critical Hamanaka Nut Kk
Priority to JP12805999A priority Critical patent/JP4448208B2/en
Publication of JP2000317738A publication Critical patent/JP2000317738A/en
Application granted granted Critical
Publication of JP4448208B2 publication Critical patent/JP4448208B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide the manufacture of an inexpensive stainless bolt scarecely causing a defective product. SOLUTION: A head part rough shape portion 21 is forged on one end of a round bar 20 made of a precipiration hardening type stainless steel having an outer diameter larger by a given dimension than that of a bolt shaft part 32, and then solution heat treatment and precipitation hardening heat treatment are performed, to adjust the portion 21 to a prescribed mechanical quality to cut the surface of the portion 21, consequently an oxide film can be removed, and the head part 31 can be finished into a given outer chape, to form the shaft part 32 into a given outer diameter, and also a screw lower portion 30 is formed on the tip side of the shaft part 32, to turningly form a screw 33 in the portion 30, or cut the portion 30.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【発明の属する技術分野】この発明はステンレス鋼ボル
トの製造方法に関し、特に製品不良がほとんど発生せ
ず、しかも低コストで製造できるようにした方法に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a stainless steel bolt, and more particularly to a method for producing a stainless steel bolt with almost no defective products and at a low cost.
【0002】[0002]
【従来の技術】構造用のボルト、ナット及び座金にはス
テンレス鋼製のものが用いられることが多い。かかるボ
ルト等に用いるステンレス鋼にはオーステナイト系、オ
ーステナイト・フェライト系、フェライト系、マルテン
サイト系及び析出硬化系が知られているが、析出硬化系
のステンレス鋼のボルト等が特に機械的性質に優れてい
る。
2. Description of the Related Art Stainless steel bolts, nuts and washers are often used. Austenitic, austenitic / ferritic, ferritic, martensitic and precipitation hardened stainless steels are known as stainless steels used for such bolts, and precipitation hardened stainless steel bolts are particularly excellent in mechanical properties. ing.
【0003】従来、析出硬化系のステンレス鋼ボルトを
製造する場合、析出硬化系ステンレス鋼線材(JIS
G4303)を所定の長さに切断し、これをボルト粗形
状に熱間鍛造し、焼きなましを行い、ショットブラスト
で表面酸化膜を除去し、その後にねじ下切削を行うか、
又は析出硬化系ステンレス鋼線材を所定長さに切断して
冷間鍛造した後、ねじを転造し、固溶化熱処理及び析出
硬化熱処理を施して規定の機械的性質に調質し、最後に
熱処理によって生成される表面酸化膜を酸洗及び電解研
磨によって除去し、表面を不動態化して製品ボルトを得
る方法が採用されていた。
Conventionally, when manufacturing precipitation hardening stainless steel bolts, precipitation hardening stainless steel wires (JIS) are used.
G4303) is cut to a predetermined length, hot forged into a rough shape of a bolt, annealed, and a surface oxide film is removed by shot blasting.
Alternatively, a precipitation hardening stainless steel wire is cut to a predetermined length and cold forged, then the thread is rolled, subjected to solution treatment and precipitation hardening heat treatment, tempered to the specified mechanical properties, and finally heat treated. A method has been adopted in which a surface oxide film formed by the above is removed by pickling and electrolytic polishing, and the surface is passivated to obtain a product bolt.
【0004】[0004]
【発明が解決しようとする課題】しかし、上記従来の製
造方法では酸洗及び電解研磨にコストがかかり、特に酸
化膜の生成を抑制すべく、固溶化熱処理及び析出硬化熱
処理を真空中で行う必要があり、これがコスト高の大き
な原因となっていた。
However, in the above-mentioned conventional manufacturing method, the pickling and the electropolishing are costly. In particular, it is necessary to perform the solution heat treatment and the precipitation hardening heat treatment in a vacuum in order to suppress the formation of an oxide film. This was a major cause of high costs.
【0005】また、酸洗及び電解研磨では表面の酸化膜
を完全に除去することが難しく、不動態化が不完全とな
って塩水噴霧試験で不合格になり、製品不良が発生する
ことがしばしばあった。
[0005] Further, it is difficult to completely remove the oxide film on the surface by pickling and electrolytic polishing, and the passivation is incomplete and the salt spray test is rejected. there were.
【0006】本発明は、かかる問題点に鑑み、製品不良
がほとんど発生せず、しかも安価に製造できるようにし
たステンレス鋼ボルトの製造方法を提供することを課題
とする。
[0006] In view of the above problems, it is an object of the present invention to provide a method of manufacturing a stainless steel bolt which hardly causes product defects and can be manufactured at low cost.
【0007】[0007]
【課題を解決するための手段】そこで、本発明に係るス
テンレス鋼ボルトの製造方法は、規定の機械的性質を有
するボルトを製造するにあたり、ボルト軸部の外径より
も所定寸法大きい外径の析出硬化型ステンレス鋼製の丸
棒の一端側に、頭部粗形状部分を鍛造によって成形する
工程と、該整形後の丸棒に対して固溶化熱処理及び析出
硬化熱処理を行って規定の機械的性質に調質する工程
と、該調質後の丸棒の全表面を切削加工することによ
り、酸化膜を除去しかつボルト頭部を所定の外形状に仕
上げ、ボルト軸部を所定の外径に成形するとともにねじ
下部分を形成する工程と、上記ねじ下部分にねじを転造
又は切削する工程と、を備えたことを特徴とする。
SUMMARY OF THE INVENTION Accordingly, a method of manufacturing a stainless steel bolt according to the present invention provides a method of manufacturing a bolt having a specified mechanical property. A step of forming a rough head portion by forging on one end side of a precipitation-hardened stainless steel round bar, and performing a solution heat treatment and a precipitation hardening heat treatment on the shaped round bar to a specified mechanical strength. A step of refining the properties and cutting the entire surface of the round bar after refining to remove the oxide film and finish the bolt head to a predetermined outer shape, and to form a bolt shaft having a predetermined outer diameter. And forming a screw lower portion, and rolling or cutting a screw in the screw lower portion.
【0008】熱処理した析出硬化型ステンレス鋼を鍛造
加工する方法は、材料が硬く、鍛造割れが発生し、ある
いは鍛造荷重が過大になる等の理由により、到底採用で
きない。そこで、従来の製造方法では析出硬化熱処理前
の比較的軟らかい段階でボルト頭部の鍛造仕上げ及びね
じの転造加工を行い、その後に熱処理を行って硬度を高
める方法を採用せざるを得なかったものと考えられる。
The method of forging a heat-treated precipitation-hardening stainless steel cannot be adopted at all because the material is hard, forging cracks occur, or the forging load becomes excessive. Therefore, in the conventional manufacturing method, forging of the bolt head and rolling of the screw were performed at a relatively soft stage before the precipitation hardening heat treatment, and thereafter, a method of increasing the hardness by performing a heat treatment had to be adopted. It is considered something.
【0009】本発明の特徴の1つはボルト製造について
の従来の常識を全面的に変更し、ボルト頭部の鍛造仕上
げを止め、ボルト頭部の粗形状を鍛造加工し、熱処理後
に切削加工によってボルト頭部の形状に仕上げ、ボルト
軸部を規定の外径に形成し、ねじを転造又は切削するよ
うにした点にある。これにより、表面の酸化膜を完全に
除去でき、コスト高となる酸洗及び電解研磨を不要にで
き、又大気中で熱処理を行うことができるので、高価な
真空設備等を不要にできる。
One of the features of the present invention is to completely change the conventional common sense of bolt manufacturing, stop forging finish of the bolt head, forge the rough shape of the bolt head, and perform cutting after heat treatment. The point is that the bolt head is finished in the shape, the bolt shaft portion is formed to a specified outer diameter, and the screw is rolled or cut. As a result, the oxide film on the surface can be completely removed, and costly acid pickling and electrolytic polishing can be eliminated, and heat treatment can be performed in the air, so that expensive vacuum equipment and the like can be eliminated.
【0010】素材丸棒の外径はボルト軸部の外径に削り
代を加えた寸法であることが必要である。丸棒の素材に
は析出硬化型ステンレス鋼、具体的にはJIS G43
03を用いる。このJIS G4303にはSUS63
0及びSUS631が含まれる。SUS630は、C:
0.007%以下、Si:1.0%以下、Mn:1.0
%以下、P:0.040%以下、S:0.030%以
下、Ni:3.0〜5.0%、Cr:15〜17.5
%、Cu:3.0〜5.0%、Nb:0.15〜0.4
5%の組成を有する。他方、SUS631は、C:0.
009%以下、Si:1.0%以下、Mn:1.0%以
下、P:0.040%以下、S:0.030%以下、N
i:6.50〜7.55%、Cr:16〜18%、A
l:0.75〜1.50%の組成を有する。
[0010] The outer diameter of the material round bar must be a dimension obtained by adding a cutting allowance to the outer diameter of the bolt shaft. The material of the round bar is precipitation hardening stainless steel, specifically JIS G43.
03 is used. This JIS G4303 has SUS63
0 and SUS631. SUS630 has C:
0.007% or less, Si: 1.0% or less, Mn: 1.0
%, P: 0.040% or less, S: 0.030% or less, Ni: 3.0 to 5.0%, Cr: 15 to 17.5
%, Cu: 3.0 to 5.0%, Nb: 0.15 to 0.4
It has a composition of 5%. On the other hand, SUS631 has C: 0.
009% or less, Si: 1.0% or less, Mn: 1.0% or less, P: 0.040% or less, S: 0.030% or less, N
i: 6.50 to 7.55%, Cr: 16 to 18%, A
l: has a composition of 0.75 to 1.50%.
【0011】また、SUS630の固溶化熱処理は10
20〜1060℃で保持した後、急冷することにより行
う。析出硬化熱処理は470〜490℃で保持した
後、空冷する、540〜560℃で保持した後、空冷
する、570〜590℃で保持した後、空冷する、
610〜630℃で保持した後、空冷する、のいずれか
に方法で行う。
The solution heat treatment of SUS630 is 10
After maintaining at 20 to 1060 ° C., it is performed by rapid cooling. The precipitation hardening heat treatment is performed at 470 to 490 ° C., then air-cooled, held at 540 to 560 ° C., air-cooled, held at 570 to 590 ° C., and air-cooled.
After holding at 610 to 630 ° C., air cooling is performed.
【0012】SUS631の固溶化熱処理は1000〜
1100℃で保持した後、急冷することにより行う。析
出硬化熱処理は760±15℃に90分保持し、1時
間以内に15℃以下に冷却して30分保持するか、56
5±10℃に90分間保持して空冷する、955±1
0℃に10分保持し、室温まで空冷するか、固溶化熱処
理後、24時間以内に−73±6℃に8時間保持する
か、510±10℃に60分間保持して空冷する、の
いずれかの方法で行う。
The solution heat treatment of SUS631 is 1000-
After holding at 1100 ° C., the cooling is performed by rapid cooling. The precipitation hardening heat treatment is maintained at 760 ± 15 ° C. for 90 minutes, cooled to 15 ° C. or less within 1 hour and maintained for 30 minutes, or
Hold at 5 ± 10 ° C for 90 minutes and air-cool, 955 ± 1
Either hold at 0 ° C. for 10 minutes and air-cool to room temperature, or after solution heat treatment, hold at −73 ± 6 ° C. for 8 hours within 24 hours or hold at 510 ± 10 ° C. for 60 minutes and air-cool. Do it in that way.
【0013】ボルト頭部と軸部とは直接連続した形態で
もよく、ボルト頭部と軸部との間に首下部を設けた形態
でもよい。首下部は頭部粗形状部分から頭部を切削する
際に形成することができる。
The bolt head and the shaft may be directly connected to each other, or may be provided with a lower portion of the neck between the bolt head and the shaft. The lower neck can be formed when cutting the head from the rough part of the head.
【0014】[0014]
【作用及び発明の効果】本発明によれば、析出硬化型ス
テンレス鋼製の丸棒に対してボルト頭部の粗形状を鍛造
した後、熱処理して規定の機械的性質を付与した後、切
削加工によってボルト頭部及び首下部を所定の外形状に
仕上げるとともに、ボルト軸部を所定の外径に形成し、
ボルト軸部にねじを転造又は切削するようにしたので、
酸化膜を完全に除去でき、製品不良の発生を大幅に削減
できる。また、高価な真空処理設備及び高価な酸洗や電
解研磨の工程を不要にでき、製造コストを大幅に低減で
きる。
According to the present invention, according to the present invention, after a rough shape of a bolt head is forged with respect to a precipitation-hardened stainless steel round bar, heat treatment is performed to impart prescribed mechanical properties, and then cutting is performed. While finishing the bolt head and neck lower part to a predetermined outer shape by processing, forming the bolt shaft part to a predetermined outer diameter,
Since the screw was rolled or cut on the bolt shaft,
The oxide film can be completely removed, and the occurrence of product defects can be significantly reduced. In addition, expensive vacuum processing equipment and expensive pickling and electrolytic polishing steps can be eliminated, and the manufacturing cost can be significantly reduced.
【0015】[0015]
【発明の実施の形態】以下、本発明を図面に示す具体例
に基づいて詳細に説明する。図1は本発明に係るステン
レス鋼ボルトの製造方法の好ましい実施形態を模式的に
示す。本例の方法でステンレス鋼ボルトを製造する場
合、図1の(a) に示されるように、製品のボルト軸部の
外径より削り代だけ大きい外径を有する析出硬化型ステ
ンレス鋼丸棒10を材料として用い、該丸棒10を所定
寸法に切断して図1の(b) に示される丸棒20を得る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to specific examples shown in the drawings. FIG. 1 schematically shows a preferred embodiment of a method for manufacturing a stainless steel bolt according to the present invention. When a stainless steel bolt is manufactured by the method of this embodiment, as shown in FIG. 1 (a), a precipitation hardening stainless steel round bar 10 having an outer diameter larger than the outer diameter of the bolt shaft portion of the product by a shaving allowance. Is used as a material, and the round bar 10 is cut into a predetermined size to obtain a round bar 20 shown in FIG.
【0016】次に、丸棒20を所定温度に加熱して鍛造
機にセットし、図1の(c) に示されるように丸棒20の
端部にボルト頭部の粗形状を熱間鍛造にて加工した後、
図1の(d) に示されるように固溶化熱処理を行って固溶
体化を行い、析出硬化熱処理を行って規定の機械的性質
に調質する。固溶化熱処理及び析出硬化熱処理はJIS
規格に沿って行うことができる。
Next, the round bar 20 is heated to a predetermined temperature and set in a forging machine, and the rough shape of the bolt head is hot forged at the end of the round bar 20 as shown in FIG. After processing at
As shown in FIG. 1 (d), a solution heat treatment is carried out to form a solid solution, and a precipitation hardening heat treatment is carried out to refine the steel to specified mechanical properties. JIS for solution heat treatment and precipitation hardening heat treatment
It can be performed according to the standard.
【0017】熱処理が済むと、図1の(e) に示されるよ
うに、丸棒20をNC旋盤(図示せず)にチャッキング
し、切削バイトを用い、丸棒20の外表面の全体を切削
加工し、ボルト頭部31及び首下部34を所定の外形状
に仕上げるとともに、ボルト軸部32は規定の外径に形
成し、さらにねじ下部分30はねじ径に対応する寸法に
切削する。これにより、表面の酸化膜は全て取り除くこ
とができる。
After the heat treatment, as shown in FIG. 1 (e), the round bar 20 is chucked on an NC lathe (not shown), and the entire outer surface of the round bar 20 is cut using a cutting tool. Cutting is performed to finish the bolt head portion 31 and the neck lower portion 34 into a predetermined outer shape, the bolt shaft portion 32 is formed to a specified outer diameter, and the screw lower portion 30 is cut to a size corresponding to the screw diameter. Thereby, all the oxide films on the surface can be removed.
【0018】最後に、ねじ下部分30に対してねじ33
を転造すると、図1の(f) に示される製品のボルトを得
ることができる。なお、転造に代え、切削によってねじ
33を形成することもできる。
Finally, the screw 33 with respect to the screw lower part 30
By rolling, a bolt of the product shown in FIG. 1 (f) can be obtained. The screw 33 can be formed by cutting instead of rolling.
【0019】例えば、材料径20.3mmのSUS63
0の丸棒10を材料として用い、長さ126mmに切り
出して丸棒20を製作した。この丸棒20を1100〜
1300℃の温度に加熱し、丸棒20の一端側に外径3
8mm、厚み18mmのボルト頭部粗形状を熱間鍛造で
成形した。
For example, SUS63 having a material diameter of 20.3 mm
A round bar 20 was manufactured by using a 0 round bar 10 as a material and cutting it out to a length of 126 mm. This round bar 20
Heat to a temperature of 1300 ° C.
A bolt head rough shape of 8 mm and thickness of 18 mm was formed by hot forging.
【0020】次に、1020〜1060℃の温度で50
〜70分間保持し、水冷して固溶化熱処理を行い、61
0〜630℃の温度で4〜5時間保持した後、空冷して
析出硬化処理を行い、硬度をHRC32に調質した。
Next, at a temperature of 1020 to 1060 ° C., 50
Hold for ~ 70 minutes, cool with water and perform solution heat treatment, 61
After maintaining at a temperature of 0 to 630 ° C for 4 to 5 hours, the mixture was air-cooled to perform a precipitation hardening treatment, and the hardness was tempered to HRC32.
【0021】その後、表面全体に対して切削加工を行
い、頭部粗形状部分31を二面幅31.6mm、高さ1
3mmの六角形状に、又頭部31に続く首下部34を高
さ1mmの規定の形状に各々仕上げ、又首下部34に続
くボルト軸部32を外径20mmに形成し、さらにボル
ト軸部32に続く35mmの部分にねじ下部分30を形
成した後、ねじ下部分30にねじ33を転造し、呼び径
M20、首下100mmの六角ボルトを製造した。これ
に塩水噴霧試験を行ったところ、24時間経過しても錆
は発生しなかった。
Thereafter, the entire surface is cut to form a rough head portion 31 having a width across flats of 31.6 mm and a height of 11.6 mm.
A hexagonal shape of 3 mm, a lower part of the neck 34 following the head 31 is finished to a prescribed shape of 1 mm in height, and a bolt shaft part 32 following the lower part of the neck 34 is formed with an outer diameter of 20 mm. After forming the screw lower portion 30 in the 35 mm portion following the above, the screw 33 was rolled into the screw lower portion 30 to manufacture a hexagonal bolt having a nominal diameter of M20 and a neck of 100 mm. When a salt spray test was performed on this, no rust was generated even after 24 hours.
【図面の簡単な説明】[Brief description of the drawings]
【図1】 本発明に係るステンレス鋼ボルトの製造方法
の好ましい実施形態を模式的に示す図である。
FIG. 1 is a view schematically showing a preferred embodiment of a method for manufacturing a stainless steel bolt according to the present invention.
【符号の説明】[Explanation of symbols]
10 丸棒 20 丸棒 30 ねじ下部分 31 頭部粗形状部分 32 ボルト軸部 33 ねじ 34 首下部 DESCRIPTION OF SYMBOLS 10 Round bar 20 Round bar 30 Screw lower part 31 Coarse head part 32 Bolt shaft part 33 Screw 34 Lower neck

Claims (1)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 規定の機械的性質を有するボルトを製造
    するにあたり、 ボルト軸部の外径よりも所定寸法大きい外径の析出硬化
    型ステンレス鋼製の丸棒の一端側に、頭部粗形状部分を
    鍛造によって成形する工程と、 該整形後の丸棒に対して固溶化熱処理及び析出硬化熱処
    理を行って規定の機械的性質に調質する工程と、 該調質後の丸棒の全表面を切削加工することにより、酸
    化膜を除去しかつボルト頭部を所定の外形状に仕上げ、
    ボルト軸部を所定の外径に成形するとともにねじ下部分
    を形成する工程と、 上記ねじ下部分にねじを転造又は切削する工程と、を備
    えたことを特徴とするステンレス鋼ボルトの製造方法。
    In manufacturing a bolt having specified mechanical properties, a rough head portion is formed on one end side of a precipitation hardening stainless steel round bar having an outer diameter that is larger than an outer diameter of a bolt shaft by a predetermined dimension. Forming a portion by forging, performing a solution heat treatment and a precipitation hardening heat treatment on the round bar after shaping to temper to a specified mechanical property, and a whole surface of the round bar after tempering. By cutting the oxide film and finishing the bolt head to the specified outer shape,
    A method of manufacturing a stainless steel bolt, comprising: a step of forming a bolt shaft portion to a predetermined outer diameter and forming a screw lower part; and a step of rolling or cutting a screw in the screw lower part. .
JP12805999A 1999-05-10 1999-05-10 Stainless steel bolt manufacturing method Expired - Lifetime JP4448208B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12805999A JP4448208B2 (en) 1999-05-10 1999-05-10 Stainless steel bolt manufacturing method

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CN102649218A (en) * 2011-02-25 2012-08-29 温永林 Manual clamping bolt processing technology
CN102699633A (en) * 2012-06-11 2012-10-03 常熟市旋力轴承钢管有限公司 Preparation method of top head for round steel hot piercing
JP2013113014A (en) * 2011-11-29 2013-06-10 Neturen Co Ltd Reinforcement structure and method of manufacturing reinforcement
CN103317313A (en) * 2013-07-15 2013-09-25 鹏驰五金制品有限公司 Automobile hub bolt and machining technology thereof
CN104014998A (en) * 2014-06-11 2014-09-03 沈阳飞机工业(集团)有限公司 Method for machining titanium alloy torsion test bar
CN104400344A (en) * 2014-10-30 2015-03-11 无锡市威海达机械制造有限公司 Bolt manufacturing technology
CN104476114A (en) * 2014-10-29 2015-04-01 苏州市金德誉精密机械有限公司 Bottom cover plate machining technology
KR101523202B1 (en) * 2014-10-13 2015-05-28 장인금속(주) Manufaction method of volt for spacecraft
CN104907770A (en) * 2015-05-29 2015-09-16 海盐宇星螺帽有限责任公司 Processing process of tetragonal nut
CN107363481A (en) * 2017-07-21 2017-11-21 南通安赛乐紧固件有限公司 A kind of cold-heading molding technique of rack bolt
CN107414423A (en) * 2017-07-26 2017-12-01 南通安赛乐紧固件有限公司 A kind of rack bolt forges moulding process
CN107570976A (en) * 2017-10-24 2018-01-12 苏州华丰不锈钢紧固件有限公司 A kind of aftertreatment technology of stainless steel bolt
CN108145385A (en) * 2017-12-27 2018-06-12 鞍钢重型机械有限责任公司 A kind of manufacturing method of high-intensity and high-tenacity bolt
CN108608166A (en) * 2016-12-12 2018-10-02 中国航空工业标准件制造有限责任公司 There is the stud processing method of keyway on a kind of screw thread
CN109434382A (en) * 2018-11-13 2019-03-08 泰州市环星不锈钢有限公司 A kind of screw production technology
CN109465607A (en) * 2018-12-26 2019-03-15 温州市鸿图汽车零部件有限公司 A kind of processing technology of high-strength bolt
WO2019054036A1 (en) * 2017-09-12 2019-03-21 日立オートモティブシステムズ株式会社 Flow volume control device, and method for manufacturing flow volume control device
KR101963743B1 (en) * 2018-07-16 2019-03-29 유대업 The manufacturing method of torque bolt with hexagonal head
CN109604937A (en) * 2018-11-09 2019-04-12 宾科汽车紧固件(昆山)有限公司 The processing technology of oil circuit bolt
CN109623269A (en) * 2018-12-05 2019-04-16 中山市固耐特金属制品有限公司 A kind of quick-fried head of anti-CARBURIZING FURNACE FOR STAINLESS FASTENER promotes the processing technology of product precision
KR101989078B1 (en) * 2019-03-25 2019-06-13 김찬식 Manufacture mothod of wrench bolt
CN110026735A (en) * 2019-02-01 2019-07-19 上海加宁新材料科技有限公司 A kind of manufacturing method of superhigh intensity bolt
CN110340617A (en) * 2019-07-13 2019-10-18 海盐县机械有限公司 A kind of anti-corrosion and high strength hex bolts production technology
CN110712007A (en) * 2019-10-23 2020-01-21 成都先进金属材料产业技术研究院有限公司 Processing method for high-temperature fastening piece of steam turbine
CN110712008A (en) * 2019-10-23 2020-01-21 成都先进金属材料产业技术研究院有限公司 Method for manufacturing heat-resistant steel fastener
CN111571145A (en) * 2020-05-28 2020-08-25 绍兴集知汇信息科技有限公司 Production and processing method of self-tapping screw

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Publication number Priority date Publication date Assignee Title
CN102649218A (en) * 2011-02-25 2012-08-29 温永林 Manual clamping bolt processing technology
JP2013113014A (en) * 2011-11-29 2013-06-10 Neturen Co Ltd Reinforcement structure and method of manufacturing reinforcement
CN102699633A (en) * 2012-06-11 2012-10-03 常熟市旋力轴承钢管有限公司 Preparation method of top head for round steel hot piercing
CN103317313A (en) * 2013-07-15 2013-09-25 鹏驰五金制品有限公司 Automobile hub bolt and machining technology thereof
CN104014998A (en) * 2014-06-11 2014-09-03 沈阳飞机工业(集团)有限公司 Method for machining titanium alloy torsion test bar
KR101523202B1 (en) * 2014-10-13 2015-05-28 장인금속(주) Manufaction method of volt for spacecraft
CN104476114A (en) * 2014-10-29 2015-04-01 苏州市金德誉精密机械有限公司 Bottom cover plate machining technology
CN104400344A (en) * 2014-10-30 2015-03-11 无锡市威海达机械制造有限公司 Bolt manufacturing technology
CN104907770A (en) * 2015-05-29 2015-09-16 海盐宇星螺帽有限责任公司 Processing process of tetragonal nut
CN108608166A (en) * 2016-12-12 2018-10-02 中国航空工业标准件制造有限责任公司 There is the stud processing method of keyway on a kind of screw thread
CN107363481A (en) * 2017-07-21 2017-11-21 南通安赛乐紧固件有限公司 A kind of cold-heading molding technique of rack bolt
CN107414423A (en) * 2017-07-26 2017-12-01 南通安赛乐紧固件有限公司 A kind of rack bolt forges moulding process
WO2019054036A1 (en) * 2017-09-12 2019-03-21 日立オートモティブシステムズ株式会社 Flow volume control device, and method for manufacturing flow volume control device
JPWO2019054036A1 (en) * 2017-09-12 2020-03-26 日立オートモティブシステムズ株式会社 Flow control device and method of manufacturing flow control device
CN107570976A (en) * 2017-10-24 2018-01-12 苏州华丰不锈钢紧固件有限公司 A kind of aftertreatment technology of stainless steel bolt
CN108145385A (en) * 2017-12-27 2018-06-12 鞍钢重型机械有限责任公司 A kind of manufacturing method of high-intensity and high-tenacity bolt
KR101963743B1 (en) * 2018-07-16 2019-03-29 유대업 The manufacturing method of torque bolt with hexagonal head
CN109604937A (en) * 2018-11-09 2019-04-12 宾科汽车紧固件(昆山)有限公司 The processing technology of oil circuit bolt
CN109434382A (en) * 2018-11-13 2019-03-08 泰州市环星不锈钢有限公司 A kind of screw production technology
CN109623269A (en) * 2018-12-05 2019-04-16 中山市固耐特金属制品有限公司 A kind of quick-fried head of anti-CARBURIZING FURNACE FOR STAINLESS FASTENER promotes the processing technology of product precision
CN109465607A (en) * 2018-12-26 2019-03-15 温州市鸿图汽车零部件有限公司 A kind of processing technology of high-strength bolt
CN110026735A (en) * 2019-02-01 2019-07-19 上海加宁新材料科技有限公司 A kind of manufacturing method of superhigh intensity bolt
KR101989078B1 (en) * 2019-03-25 2019-06-13 김찬식 Manufacture mothod of wrench bolt
CN110340617A (en) * 2019-07-13 2019-10-18 海盐县机械有限公司 A kind of anti-corrosion and high strength hex bolts production technology
CN110712007A (en) * 2019-10-23 2020-01-21 成都先进金属材料产业技术研究院有限公司 Processing method for high-temperature fastening piece of steam turbine
CN110712008A (en) * 2019-10-23 2020-01-21 成都先进金属材料产业技术研究院有限公司 Method for manufacturing heat-resistant steel fastener
CN111571145A (en) * 2020-05-28 2020-08-25 绍兴集知汇信息科技有限公司 Production and processing method of self-tapping screw
CN111571145B (en) * 2020-05-28 2021-06-22 珠海经济特区华凯工贸有限公司 Production and processing method of self-tapping screw

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