CN104400344A - Bolt manufacturing technology - Google Patents

Bolt manufacturing technology Download PDF

Info

Publication number
CN104400344A
CN104400344A CN201410595527.3A CN201410595527A CN104400344A CN 104400344 A CN104400344 A CN 104400344A CN 201410595527 A CN201410595527 A CN 201410595527A CN 104400344 A CN104400344 A CN 104400344A
Authority
CN
China
Prior art keywords
bolt
cold
equal
screw
less
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.)
Pending
Application number
CN201410595527.3A
Other languages
Chinese (zh)
Inventor
黄铁军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUXI WEIHAIDA MACHINERY MANUFACTURING Co Ltd
Original Assignee
WUXI WEIHAIDA MACHINERY MANUFACTURING Co Ltd
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 WUXI WEIHAIDA MACHINERY MANUFACTURING Co Ltd filed Critical WUXI WEIHAIDA MACHINERY MANUFACTURING Co Ltd
Priority to CN201410595527.3A priority Critical patent/CN104400344A/en
Publication of CN104400344A publication Critical patent/CN104400344A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass

Abstract

The invention provides a bolt manufacturing technology which comprises the following steps of selecting materials, hot-rolling a coil rod, spheroidizing annealing, performing mechanical descaling, performing acid pickling, performing cold drawing, performing cold forging forming, performing thread machining, performing heat treatment and testing, wherein the materials comprises, by weight, 0.25-0.55% of C, 0.45-0.80% of Mn, smaller than or equal to 0.30% of Si, smaller than or equal to 0.030% of P, smaller than or equal to 0.035% of S and the largest value of 0.005% of B, and the steel softening annealing temperature is 715-770 degree centigrade. The bolt manufacturing technology is suitable for manufacturing mass bolts, and the manufacturing technology enables the bolts to be high in structural strength and strong in toughness.

Description

A kind of screw bolt manufacture process
Technical field
The present invention relates to a kind of screw bolt manufacture process, belong to machinery manufacturing technology field.
Background technology
The nut of existing bolt can adopt cold pier or hot pier technique the method to save material, selects the method for pier according to pier forging machine tonnage size and the diameter of bolt.The turret head of the special or special bolts of small lot is that after turning, milling becomes.Single and mini-batch production can use the method such as threading die mantle fiber, lathe Pick Wire, whirling mill milling.Shank of bolt manufacturing process has cold-drawn and undergauge, so this bolt does not have threaded section diameter not necessarily smaller.When adopting cold-drawn, smaller; When adopting undergauge, can be isometrical or slightly large with screw thread.Bolt material is alloy or the metal of the low melting points such as aluminium alloy, kirsite, copper alloy, also can adopt the method for die cast.Above-described processing method is all suitable for the bolt manufacture of small lot, and is not very applicable for large batch of bolt manufacture.
Summary of the invention
The invention provides a kind of screw bolt manufacture process, be particularly useful for large batch of bolt manufacture, and the bolt quality produced is good, structural strength is high, good toughness.
For solving above technical problem, the invention provides following technical scheme: a kind of screw bolt manufacture process, comprising the steps: selection-gren rod-spheroidizing-mechanical descaling-pickling-cold group-cold-forging forming-screw thread process-heat treatment-inspection; Selection: C content to be 0.25%-0.55%, Mn be 0.45%-0.80%, Si is less than or equal to 0.30%, P and is less than or equal to 0.030%, S to be less than or equal to 0.035%, B maximum be 0.005%; Wherein, steel softening annealing temperature is 715-770 degree Celsius, isothermal temperature 680-700 degree Celsius; De-scaling comprises bending method and spray nine methods, and wherein bending method is the circle wheel alternating bending wire rod using band triangular groove, forms compound de-scaling after dephosphorization through chemical pickling; The draft value of cold-drawn controls in the scope of 10%-15%; In screw thread process, the shaping of bolt head adopts cold-heading plastic working, and metallic fiber is sequential like along shape of product, and middle without cutting off, blank delivers to jumping-up shaping station after cutting off; Bolt thread adopts cold working, makes threaded blank within the scope of certain diameter by screw plate, makes screw forming by filament plate pressure; Heat treatment bolt, from material loading-cleaning-heating-quenching-cleaning-tempering-painted to rolling off the production line, all adopting and automatically controlling.
This screw bolt manufacture process that the present invention relates to, be applicable to the manufacture of bolt in enormous quantities, manufacturing process makes the structural strength of bolt high, and toughness is strong.
Detailed description of the invention
A kind of screw bolt manufacture process, comprises the steps: selection-gren rod-spheroidizing-mechanical descaling-pickling-cold group-cold-forging forming-screw thread process-heat treatment-inspection; Selection: C content to be 0.25%-0.55%, Mn be 0.45%-0.80%, Si is less than or equal to 0.30%, P and is less than or equal to 0.030%, S to be less than or equal to 0.035%, B maximum be 0.005%; Wherein, steel softening annealing temperature is 715-770 degree Celsius, isothermal temperature 680-700 degree Celsius; De-scaling comprises bending method and spray nine methods, and wherein bending method is the circle wheel alternating bending wire rod using band triangular groove, forms compound de-scaling after dephosphorization through chemical pickling; The draft value of cold-drawn controls in the scope of 10%-15%; In screw thread process, the shaping of bolt head adopts cold-heading plastic working, and metallic fiber is sequential like along shape of product, and middle without cutting off, blank delivers to jumping-up shaping station after cutting off; Bolt thread adopts cold working, makes threaded blank within the scope of certain diameter by screw plate, makes screw forming by filament plate pressure; Heat treatment bolt, from material loading-cleaning-heating-quenching-cleaning-tempering-painted to rolling off the production line, all adopting and automatically controlling.
Bolt all will carry out modifier treatment according to technical requirement.Heat treatment quenching and tempering is the comprehensive mechanical performance in order to improve bolt, to meet the tensile strength values and yield tensile ratio that product specifies.Technology for Heating Processing has vital impact to bolt especially its inherent quality, therefore, wants the bolt producing high-quality, must have advanced heat treatment technics equipment.Because bolt output is large, cheap, threaded portion is again the structure of thinner microfacies to precision, and therefore, require that Equipment for Heating Processing must possess production capacity large, automaticity is high, the ability that thermal treatment quality is good.Shake end type net belt furnace is particularly useful for the heat treatment quenching and tempering of medium and small sized bolt.Modified line, except stove good seal performance, also has advanced atmosphere, and temperature and technological parameter computer control, device failure alert and Presentation Function.Bolt is from material loading-cleaning-heating-quenching-cleaning-tempering-painted to rolling off the production line, and whole auto-controll operation, effectively ensure that thermal treatment quality.The decarburization of screw thread can cause bolt first to be threaded off when not reaching the drag of mechanical property requirements, screw bolt is lost efficacy, reduction of service life.Due to the decarburization of raw material, if it is improper to anneal, raw material decarburized layer more can be made to deepen.In Tempering and Quenching process, generally to come in addition some oxidizing gases from stove.Residue after the iron rust of bar steel wire or cold-drawn in wire rod Steel Wire Surface, also can decompose after entering stove heating, reaction generates some oxidizing gas.Such as, the surperficial iron rust of steel wire, its composition is ferric carbonate and hydroxide, will resolve into CO2 and H2O after the heating, thus increase the weight of decarburization.Comparatively carbon steel is serious for the decarbonization degree of medium carbon alloy steel, and the fastest decarburization temperature is between 700-800 degree Celsius.It is very fast that attachment due to Steel Wire Surface decomposes the speed of being combined to CO2 and H2O under certain condition, if the control of grill-hearth travelling oven furnace gas is improper, screw decarburization also can be caused overproof.Bolt is when adopting cold upset forming, and not but still exist, and be extruded to the top of screw thread, for the bolt surface needing quenching, can not get required hardness, its mechanical performance (particularly intensity and wearability) does not reduce the decarburized layer of raw material and annealing.In addition, Steel Wire Surface decarburization, top layer is different from interior tissue and have the different coefficients of expansion, likely produces face crack during quenching.For this reason; threaded top not decarburization to be protected when Quench heating; also will to the bolt of raw material decarburization carry out appropriateness cover carbon; the original phosphorus content of the part advantage of the protective atmosphere in meshbeltfurnace being transferred to and being coated to carbon is substantially equal, and make the bolt of decarburization slowly return to original phosphorus content, carbon potential is set in 0.42%-0.48% and is advisable; cover carbon temperature identical with Quench heating; at high temperature can not carry out, in order to avoid coarse grains, affect mechanical performance.
Detailed description of the invention of the present invention does not form the restriction to the application's scope; within every spirit in the present invention's design and principle, any amendment that one of skill in the art can make, equivalent to replace and improvement etc. all should be included within protection scope of the present invention.

Claims (1)

1. a screw bolt manufacture process, is characterized in that: comprise the steps: selection-gren rod-spheroidizing-mechanical descaling-pickling-cold group-cold-forging forming-screw thread process-heat treatment-inspection; Selection: C content to be 0.25%-0.55%, Mn be 0.45%-0.80%, Si is less than or equal to 0.30%, P and is less than or equal to 0.030%, S to be less than or equal to 0.035%, B maximum be 0.005%; Wherein, steel softening annealing temperature is 715-770 degree Celsius, isothermal temperature 680-700 degree Celsius; De-scaling comprises bending method and spray nine methods, and wherein bending method is the circle wheel alternating bending wire rod using band triangular groove, forms compound de-scaling after dephosphorization through chemical pickling; The draft value of cold-drawn controls in the scope of 10%-15%; In screw thread process, the shaping of bolt head adopts cold-heading plastic working, and metallic fiber is sequential like along shape of product, and middle without cutting off, blank delivers to jumping-up shaping station after cutting off; Bolt thread adopts cold working, makes threaded blank within the scope of certain diameter by screw plate, makes screw forming by filament plate pressure; Heat treatment bolt, from material loading-cleaning-heating-quenching-cleaning-tempering-painted to rolling off the production line, all adopting and automatically controlling.
CN201410595527.3A 2014-10-30 2014-10-30 Bolt manufacturing technology Pending CN104400344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410595527.3A CN104400344A (en) 2014-10-30 2014-10-30 Bolt manufacturing technology

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410595527.3A CN104400344A (en) 2014-10-30 2014-10-30 Bolt manufacturing technology

Publications (1)

Publication Number Publication Date
CN104400344A true CN104400344A (en) 2015-03-11

Family

ID=52638043

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410595527.3A Pending CN104400344A (en) 2014-10-30 2014-10-30 Bolt manufacturing technology

Country Status (1)

Country Link
CN (1) CN104400344A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104924033A (en) * 2015-06-09 2015-09-23 柳州弘天科技有限公司 Bolt machining process
CN106636572A (en) * 2016-12-26 2017-05-10 海盐常绿标准件有限公司 Heat treatment process for metal part
CN106676393A (en) * 2017-02-17 2017-05-17 江苏佳杰特种螺钉有限公司 Technology for producing fastener for aerospace
CN107486683A (en) * 2017-07-21 2017-12-19 南通安赛乐紧固件有限公司 A kind of steel structure bolt forges moulding process
CN108176954A (en) * 2017-12-15 2018-06-19 浙江天力机车部件有限公司 The forming technology of fastener
CN108788633A (en) * 2018-05-24 2018-11-13 浙江摩根兄弟科技有限公司 A kind of processing method of bolt
CN108817569A (en) * 2018-07-17 2018-11-16 苏州温锑姆精密机械有限公司 The Screw thread process method of high-hardness
CN109333013A (en) * 2018-12-26 2019-02-15 温州市鸿图汽车零部件有限公司 A kind of bolt processing method
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
CN109483156A (en) * 2017-09-13 2019-03-19 南京美克斯精密机械有限公司 A kind of bolt processing method
CN109794731A (en) * 2018-12-12 2019-05-24 浙江国盛汽车科技股份有限公司 A kind of hollow bolt and its processing technology

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000317738A (en) * 1999-05-10 2000-11-21 Hamanaka Nut Kk Manufacture of stainless steel bolt
JP2001062639A (en) * 1999-08-20 2001-03-13 Kobe Steel Ltd High strength bolt excellent in delayed fracture resistance and manufacture thereof
CN101028680A (en) * 2007-04-02 2007-09-05 马鞍山钢铁股份有限公司 Method for producing 8.8-grade high-strength fastener
CN101346481A (en) * 2005-12-26 2009-01-14 Posco公司 High-strength steel bolt having excellent resistance for delayed fracture and method for producing the same
CN101890618A (en) * 2010-06-17 2010-11-24 鹏驰五金制品有限公司 Processing method of high-strength bolts
CN102284835A (en) * 2011-07-05 2011-12-21 浙江捷能汽车零部件有限公司 Method for producing 10.9-class vehicle bolt of above M12
CN103820726A (en) * 2014-03-17 2014-05-28 河南赛诺米特种设备有限公司 Method for manufacturing bolts with relatively high fatigue strength

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000317738A (en) * 1999-05-10 2000-11-21 Hamanaka Nut Kk Manufacture of stainless steel bolt
JP2001062639A (en) * 1999-08-20 2001-03-13 Kobe Steel Ltd High strength bolt excellent in delayed fracture resistance and manufacture thereof
CN101346481A (en) * 2005-12-26 2009-01-14 Posco公司 High-strength steel bolt having excellent resistance for delayed fracture and method for producing the same
CN101028680A (en) * 2007-04-02 2007-09-05 马鞍山钢铁股份有限公司 Method for producing 8.8-grade high-strength fastener
CN101890618A (en) * 2010-06-17 2010-11-24 鹏驰五金制品有限公司 Processing method of high-strength bolts
CN102284835A (en) * 2011-07-05 2011-12-21 浙江捷能汽车零部件有限公司 Method for producing 10.9-class vehicle bolt of above M12
CN103820726A (en) * 2014-03-17 2014-05-28 河南赛诺米特种设备有限公司 Method for manufacturing bolts with relatively high fatigue strength

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘翼琼: "《钢铁冶金学 (第三册)钢的成形》", 31 October 1992 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104924033A (en) * 2015-06-09 2015-09-23 柳州弘天科技有限公司 Bolt machining process
CN106636572A (en) * 2016-12-26 2017-05-10 海盐常绿标准件有限公司 Heat treatment process for metal part
CN106676393A (en) * 2017-02-17 2017-05-17 江苏佳杰特种螺钉有限公司 Technology for producing fastener for aerospace
CN107486683A (en) * 2017-07-21 2017-12-19 南通安赛乐紧固件有限公司 A kind of steel structure bolt forges moulding process
CN109483156A (en) * 2017-09-13 2019-03-19 南京美克斯精密机械有限公司 A kind of bolt processing method
CN108176954A (en) * 2017-12-15 2018-06-19 浙江天力机车部件有限公司 The forming technology of fastener
CN108788633A (en) * 2018-05-24 2018-11-13 浙江摩根兄弟科技有限公司 A kind of processing method of bolt
CN108817569A (en) * 2018-07-17 2018-11-16 苏州温锑姆精密机械有限公司 The Screw thread process method of high-hardness
CN109794731A (en) * 2018-12-12 2019-05-24 浙江国盛汽车科技股份有限公司 A kind of hollow bolt and its processing technology
CN109333013A (en) * 2018-12-26 2019-02-15 温州市鸿图汽车零部件有限公司 A kind of bolt processing method
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

Similar Documents

Publication Publication Date Title
CN104532149B (en) A kind of high tough, anti-H 2 S stress corrosion drilling tool round steel and manufacture method thereof
CN106319368B (en) A kind of economical thin carrier bar and its manufacture method
CN100558504C (en) The low temperature resistant oil derrick power transmission tower frame preparation method of seamless heterotype steel pipe
CN103009011B (en) Processing method for stainless steel high-strength bolt
CN101549448B (en) Processing technology for high-strength bolt used for steel net frame bolt ball node
CN104480477B (en) A kind of anti-corrosion and high strength hex bolts production technology
CN102943207B (en) High-strength fastener and processing method thereof
CN100417827C (en) Double-metal solid bearing cage and producing process thereof
JP6031022B2 (en) Steel wire for bolt excellent in delayed fracture resistance, high-strength bolt, and method for producing them
JP5126857B2 (en) Manufacturing method of case-hardened steel pipe with excellent workability
CN102181793B (en) Process for manufacturing steel forge piece of vertical conveying pipe of deep sea oil extraction equipment
JP4013969B2 (en) Hot forged product with excellent fatigue strength, method for producing the same, and machine structural component
CN102321851B (en) 10.9-grade boron-containing spheroidizing-free cold heading steel wire rod and manufacturing method thereof
CN101403032B (en) Thermal treatment process for quick cutting steel composite roll
CN101768698B (en) Low cost yield strength 700MPA level non-tempering processing high strength steel plate and manufacturing method thereof
CN102019335B (en) Cold forging processing method of hardened and tempered structural steel
CN102676929B (en) Method for manufacturing spheroidizing-free high-quality high-strength cold forging steel
JP4340754B2 (en) Steel having high strength and excellent cold forgeability, and excellent molded parts such as screws and bolts or shafts having excellent strength, and methods for producing the same.
CN103409642B (en) Processing method of low yield ratio high strength titanium coiled plate for heat exchanger
CN103849746A (en) Thermal treatment process for 40CrNiMoA core rod and 40CrNiMoA core rod obtained through process
CN102581145B (en) Method for manufacturing high-hardness and high-abrasion-resistant pre-bending machine lower die
CN101684533A (en) High strength cold-rolled plate with excellent formability and production method thereof
CN104313281A (en) Process for producing high-nodularity fastener wire rod
CN101890618B (en) Processing method of high-strength bolts
CN101487487B (en) Manufacturing process for stress relaxation-resistant high-strength bolt

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20150311