CN102581558B - Machining process of long and thin screw - Google Patents
Machining process of long and thin screw Download PDFInfo
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- CN102581558B CN102581558B CN201210043223.7A CN201210043223A CN102581558B CN 102581558 B CN102581558 B CN 102581558B CN 201210043223 A CN201210043223 A CN 201210043223A CN 102581558 B CN102581558 B CN 102581558B
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- upsetting
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- size
- elongated screw
- car
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Abstract
The invention relates to a machining process of a long and thin screw. The machining process comprises the following steps of: preparing materials, forging, turning, carrying out thread rolling, carrying out demagnetization treatment, carrying out surface treatment, assembling components, packaging and storing in a warehouse. The coaxiality and the straightness of the long and thin screw machined by the machining process are good, the product quality is stable, the machining cost is reduced and the production period is shortened, so that the machining process is very suitable for production in a large batch.
Description
Technical field
The invention belongs to mechanical manufacturing field, particularly a kind of processing technology of elongated screw.
Background technology
In the standard component that the fields such as Aeronautics and Astronautics, boats and ships, civil aviaton, military spacecraft are used, locking strip is the indispensable conventional annex of electronic integrated circuit modularized design.It is arranged on electronic circuit board (printed board) edge, locking strip is a kind of conventional type of attachment of electronic circuit board, the distance between pressure strip and guide rail is carried out by pressure change its thickness, daughter board and motherboard form firm connection, be convenient to Fast Installation, dismounting, there is good ground connection performance and environmental suitability, be widely used in the fields such as Aeronautics and Astronautics, boats and ships, civil aviaton, military spacecraft.Elongated screw in this product, major diameter ratio is comparatively large, and minimum diameter is d
2=2, this just proposes strict demand to machining; D simultaneously
1require very high with the axiality of D, ensure comparatively difficulty by machining, therefore in selection, processing technology, hotlist process etc., all will be subject to strict restriction.
Summary of the invention
The technical problem to be solved in the present invention, according to according to locking strip performance and handling characteristics, on the basis of electronic integrated circuit modular wire line plate locking strip of summing up the fields such as China's Aeronautics and Astronautics, boats and ships, civil aviaton, the experience of the exploitation manufacture of abundant foreign Related product, a kind of new processing technology developed.
A kind of processing technology of elongated screw is as follows:
(1) get the raw materials ready: 1Cr18Ni9Ti checks by GJB/T2294-1995;
(2) upsetting system: by upsetting system, the axiality of elongated screw bar portion and head reaches 0.1mm requirement, and screw head and end face stay the allowance of 0.5 ~ 0.8mm respectively; R0.3 reaches requirement, will carry out examination base before upsetting system, and the upsetting of threaded shank size is made as D
1, guarantee upsetting quality;
(3) car:
1. after meeting above-mentioned requirements, car elongated screw head and end ensure H, D dimensional requirement, reverse end for end flat threaded shank end face and chamfering, ensure length L and L
1, cutting thread base footpath, first carries out examination base, stays mill amount 0.08 ~ 0.12mm;
2. car neck d
2size, stays mill amount 0.08 ~ 0.12mm;
(4) thread grinding base footpath, first carries out examination base; Neck d
2size reaches requirement;
(5) thread rolling, d size reaches requirement;
(6) demagnetization process;
(7) surface treatment: cleaning;
(8) component assembling;
(9) pack;
(10) put in storage.
Adopt the elongated screw axiality that processes of said method and linearity good, constant product quality, reduces processing cost simultaneously, shortens the production cycle, is very applicable to batch production.
Accompanying drawing explanation
Fig. 1 is product structure schematic diagram of the present invention;
Detailed description of the invention
According to requirements, this product elongated screw meets the feature being convenient to Fast Installation, dismounting, there is good ground connection performance and environmental suitability, by consulting associated materials and Materials Handbook, again in conjunction with practical work experience, determine to adopt 1Cr18Ni9Ti material because the intensity of 1Cr18Ni9Ti material and hardness better.General draw ratio d
2the processing of/L>=10 is exactly the processing of slender axles, the maximum draw ratio d of this product elongated screw
2/ L=66.The minimum diameter of elongated screw is d
2=2mm, simultaneously D
1be 0.1mm with the axiality of D.Draw ratio is larger, can produce serious cutter relieving phenomenon, make part deformation, thus cause D in process
1be difficult to ensure with the axiality of D and the linearity in shank of screw portion, conventional machining process therefore can not be adopted to process.D
1surface roughness 1.6, and must not there be obvious flaw on surface, each size has certain required precision, so after the factor of synthesise various, the processing technology determining elongated screw is as follows:
(1) get the raw materials ready: 1Cr18Ni9Ti checks by GJB/T2294-1995;
(2) upsetting system: by upsetting system, the axiality of elongated screw bar portion and head reaches 0.1mm requirement, and screw head and end face stay the allowance of 0.5 ~ 0.8mm respectively; R0.3 reaches requirement, will carry out examination base before upsetting system, and the upsetting of threaded shank size is made as D
1, guarantee upsetting quality;
(3) car:
1. after meeting above-mentioned requirements, car elongated screw head and end ensure H, D dimensional requirement, reverse end for end flat threaded shank end face and chamfering, ensure length L and L
1, cutting thread base footpath, first carries out examination base, stays mill amount 0.08 ~ 0.12mm;
2. car neck d
2size, stays mill amount 0.08 ~ 0.12mm;
(4) thread grinding base footpath, first carries out examination base; Neck d
2size reaches requirement;
(5) thread rolling, d size reaches requirement;
(6) demagnetization process;
(7) surface treatment: cleaning;
(8) component assembling;
(9) pack;
(10) put in storage.
Adopt the advantage of above-mentioned processing technology:
1. material property meets the serviceability of design.
2. upsetting processing arrangement is reasonable, decrease the scale error of machining multiple clamping and generation thereof, and axiality meets designing requirement.
3., because type is made in the upsetting of screw head and shank of screw portion, while guarantee screw head and the axiality in bar portion and the linearity in shank of screw portion, also substantially reducing the process-cycle of product, having won the time for obtaining more client.
4. the uniformity of product size is good, steady quality.
Claims (1)
1. a processing technology for elongated screw, is characterized in that, the processing technology of described elongated screw is as follows:
(1) get the raw materials ready: 1Cr18Ni9Ti checks by GJB/T2294-1995;
(2) upsetting system: by upsetting system, the axiality of elongated screw bar portion and head reaches 0.1mm requirement, and screw head and end face stay the allowance of 0.5 ~ 0.8mm respectively; R0.3 reaches requirement, will carry out examination base before upsetting system, and the upsetting of threaded shank size is made as D
1, guarantee upsetting quality;
(3) car:
1. after meeting above-mentioned requirements, car elongated screw head and end ensure H, D dimensional requirement, reverse end for end flat threaded shank end face and chamfering, ensure length L and L
1, cutting thread base footpath, first carries out examination base, stays mill amount 0.08 ~ 0.12mm;
2. car neck d
2size, stays mill amount 0.08 ~ 0.12mm;
(4) thread grinding base footpath, first carries out examination base; Neck d
2size reaches requirement;
(5) thread rolling, d size reaches requirement;
(6) demagnetization process;
(7) surface treatment: cleaning;
(8) component assembling;
(9) pack;
(10) put in storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210043223.7A CN102581558B (en) | 2012-02-24 | 2012-02-24 | Machining process of long and thin screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210043223.7A CN102581558B (en) | 2012-02-24 | 2012-02-24 | Machining process of long and thin screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102581558A CN102581558A (en) | 2012-07-18 |
| CN102581558B true CN102581558B (en) | 2015-05-20 |
Family
ID=46471091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210043223.7A Active CN102581558B (en) | 2012-02-24 | 2012-02-24 | Machining process of long and thin screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102581558B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102744577B (en) * | 2012-07-23 | 2015-11-25 | 鹏驰五金制品有限公司 | A kind of stainless steel heavy type expansion screw rod and moulding process thereof |
| CN103170804A (en) * | 2013-03-20 | 2013-06-26 | 常州凯翔医用不锈钢有限公司 | Manufacturing technique of medical fastening screw |
| CN103170805A (en) * | 2013-03-22 | 2013-06-26 | 常州凯旺金属材料有限公司 | Biomedical stainless steel processing technique and method of manufacturing bolt and precise axel steel thereof |
| CN103223572B (en) * | 2013-04-11 | 2015-06-17 | 漳州鑫一达五金电子有限公司 | Anchoring nail processing method |
| CN103962809A (en) * | 2014-05-21 | 2014-08-06 | 贵州航锐航空精密零部件制造有限公司 | Manufacturing method for 17-4PH screw |
| CN107322237A (en) * | 2017-06-22 | 2017-11-07 | 贵州精立航太科技有限公司 | A kind of processing technology of high-temperature alloy bolt |
| CN111843392A (en) * | 2020-07-30 | 2020-10-30 | 贵州精立航太科技有限公司 | Machining process of core rod of self-plugging rivet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2341469A (en) * | 1943-02-20 | 1944-02-08 | Newall Archibald Park | Method of manufacturing waisted bolts |
| CN1443946A (en) * | 2003-04-17 | 2003-09-24 | 南京汽车集团有限公司 | Production process of high strength bolt with above 1300MPa |
| CN101797685A (en) * | 2010-04-08 | 2010-08-11 | 浙江裕泰紧固件制造有限公司 | Process for manufacturing high-strength bolt |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08309472A (en) * | 1995-05-11 | 1996-11-26 | Daido Steel Co Ltd | Manufacture of precipitation hardening type stainless steel bolt |
| US20110158767A1 (en) * | 2009-12-29 | 2011-06-30 | Ohio Rod Products | Reduced material, content fasteners and systems and methods for manufacturing the same |
-
2012
- 2012-02-24 CN CN201210043223.7A patent/CN102581558B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2341469A (en) * | 1943-02-20 | 1944-02-08 | Newall Archibald Park | Method of manufacturing waisted bolts |
| CN1443946A (en) * | 2003-04-17 | 2003-09-24 | 南京汽车集团有限公司 | Production process of high strength bolt with above 1300MPa |
| CN101797685A (en) * | 2010-04-08 | 2010-08-11 | 浙江裕泰紧固件制造有限公司 | Process for manufacturing high-strength bolt |
Non-Patent Citations (1)
| Title |
|---|
| 细长杆螺钉顶镦工艺;徐天明;《机械工人.热加工》;19830831(第08期);24-25 * |
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| Publication number | Publication date |
|---|---|
| CN102581558A (en) | 2012-07-18 |
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