CN110586845A - Manufacturing method of large square nut for automobile chassis connecting system - Google Patents

Manufacturing method of large square nut for automobile chassis connecting system Download PDF

Info

Publication number
CN110586845A
CN110586845A CN201910805643.6A CN201910805643A CN110586845A CN 110586845 A CN110586845 A CN 110586845A CN 201910805643 A CN201910805643 A CN 201910805643A CN 110586845 A CN110586845 A CN 110586845A
Authority
CN
China
Prior art keywords
square nut
molded finished
mold
nut head
cylindrical
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
CN201910805643.6A
Other languages
Chinese (zh)
Other versions
CN110586845B (en
Inventor
张金清
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.)
ANTUO INDUSTRY Co Ltd NINGBO
Original Assignee
ANTUO INDUSTRY Co Ltd NINGBO
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 ANTUO INDUSTRY Co Ltd NINGBO filed Critical ANTUO INDUSTRY Co Ltd NINGBO
Priority to CN201910805643.6A priority Critical patent/CN110586845B/en
Publication of CN110586845A publication Critical patent/CN110586845A/en
Application granted granted Critical
Publication of CN110586845B publication Critical patent/CN110586845B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00Details of machines for forging, pressing, or hammering
    • B21J13/02Dies or mountings therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08Upsetting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/10Piercing billets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21KMAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00Making machine elements
    • B21K1/64Making machine elements nuts
    • B21K1/70Making machine elements nuts of special shape, e.g. self-locking nuts, wing nuts

Abstract

The invention provides a manufacturing method of a large square nut for an automobile chassis connecting system, which can manufacture a square nut through a cold heading method, wherein the square nut comprises a round-corner square nut head and a cylindrical part at the lower part of the round-corner square nut head, and axial grooves are arranged in the middles of two opposite sides of the round-corner square nut head. The large square nut for the automobile chassis connecting system can be formed in one step by adopting a multi-station cold extrusion forming technology through reasonable step arrangement, the material is saved, the process steps are few, only inner hole tapping is needed in the subsequent process, the material can be saved by 11 percent, the production speed can reach 60 PCS/min, the average daily output is 28800PCS, the production cost is reduced by more than 50 percent, and the waste of manpower and materials is reduced. The cold extrusion molding product has the advantages of smooth surface, size precision control, stable product quality, firmer structure, high use safety, strong bearing capacity, quickness and easiness in installation and the like. The product is widely applied to the chassis connecting system of high-grade automobiles.

Description

Manufacturing method of large square nut for automobile chassis connecting system
Technical Field
The invention relates to the technical field of multi-station cold heading, in particular to a manufacturing method of a large square nut for an automobile chassis connecting system.
Background
The cross section of the large square nut for the automobile chassis connecting system is approximately in a T-shaped structure, the difference between the shape and the size of the top and the lower part of the top is large, the top is also provided with an ear groove on the side surface, and the whole process is difficult to manufacture by adopting a cold extrusion process.
The large square nut for the automobile chassis connecting system comprises a round corner square nut head and a cylindrical part at the lower part of the round corner square nut head, wherein a central hole of the nut penetrates through the cylindrical part at the lower part and the round corner square nut head, the length of a diagonal line of the round corner square nut head is basically 1.8-2.2 times of the diameter of the cylindrical part at the lower part, the four round corner square nut head is of a thin plate structure, the ratio of the length of the cylindrical part to the thickness of the round corner square nut head reaches 3.5-4.5 times, and axial grooves, commonly called as ear grooves, are formed in the middle parts of two opposite sides of the round corner square nut head.
The large square nut machining workload for the automobile chassis connecting system used at present in China is large, materials are consumed, the production speed is extremely low, and the market requirements cannot be met.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for manufacturing a large square nut for an automobile chassis connecting system, which can directly manufacture the large square nut for the automobile chassis connecting system by a cold extrusion method, improve the utilization rate and quality of raw materials and improve the production efficiency. Therefore, the invention adopts the following technical scheme:
the manufacturing method of the large square nut for the automobile chassis connecting system is characterized in that the large square nut for the automobile chassis connecting system comprises a fillet square nut head and a cylindrical part at the lower part of the fillet square nut head, a central hole of the nut penetrates through the cylindrical part and the fillet square nut head, the length of a diagonal line of the fillet square nut head is 1.8-2.2 times of the diameter of the cylindrical part, the fillet square nut head is of a thin plate structure, the ratio of the length of the cylindrical part to the thickness of the fillet square nut head is 3.5-4.5, and axial grooves are formed in the middle parts of two opposite sides of the fillet square nut head;
the manufacturing method comprises the following steps:
(1) feeding the disc round material into a cold heading forming machine through a feeding wheel to automatically shear the disc round material into a single raw material piece, wherein the diameter of the disc round material is basically consistent with that of the cylindrical part, and the length dimension of the raw material piece is larger than the height dimension of the large square nut;
(2) the raw material piece is moved into a first die opening of a cold heading forming machine, the raw material piece is ejected into a first die concave die by a punching tool at the front end of the first die, and a first molded finished product is manufactured by cold heading in the first die, wherein a positioning hole is formed in the front end of the first molded finished product on the basis of the raw material piece, and an arc angle is formed in the rear end of the first molded finished product;
(3) the first molded finished product is translated to a second mold opening, the first molded finished product is pushed into a second mold concave die by a punching tool at the front end of the second mold, and the front end of the second molded finished product is upset into a counter bore and the rear end is contracted through cold heading in the second mold; the depth of the counter bore is consistent with the height of the cylindrical part, the wall thickness of the counter bore is consistent with the wall thickness of a central hole of the cylindrical part, and a second molded finished product is manufactured.
(4) Turning over the second molded finished product and moving the second molded finished product to a third mold opening, ejecting the second molded finished product into a third mold concave die by a punching tool at the front end of the third mold, and forming a preparation shape of a fillet square nut head of the large square nut by cold heading at the front end of the third molded finished product through cold heading in the third mold, at the lower part of the preliminary shape, the automobile chassis connection system is formed by upsetting the cylindrical portion of the large square nut and the center hole thereof, the cross-sectional outer contour shape of the prepared-shape main body is consistent with but slightly reduced from that of the round-corner square nut head, the thickness of the preliminary-shaped body is slightly thicker than that of the round-corner square nut head, the front end of the preliminary-shaped body is upset to form a positioning hole, the four corners of the front end of the main body are respectively provided with a convex block structure to manufacture a third molded finished product;
(5) the third molded finished product is translated to a fourth mold opening, the third molded finished product is pushed into a fourth mold concave die by a punching tool at the front end of the fourth mold, and the fourth molded finished product is manufactured by cold upsetting in the fourth mold, so that the front end of the fourth molded finished product forms a fillet square nut head prototype with the cross section outer contour size and the thickness of the fillet square nut head, but does not have the axial groove, and the fillet square nut head prototype of the fourth molded finished product is extruded and compacted at the part, which is radially positioned outside the cylindrical part, of the fillet square nut head prototype by utilizing the convex block configuration of four corners of the third molded finished product to manufacture the fourth molded finished product;
(6) the fourth molded finished product is horizontally moved to a fifth mold opening, the fourth molded finished product is pushed into a fourth mold concave die by a punching tool at the front end of the fifth mold, and the fillet square nut head prototype of the fourth molded finished product is subjected to cold extrusion to form the axial groove on two opposite edges of the fillet square nut head prototype through cold heading manufacturing in the fifth mold, so that the fifth molded finished product is manufactured;
(7) and translating the fifth molded finished product to a sixth mold, carrying out iron core penetration on the fifth molded finished product, penetrating and forming a central hole of the nut, and manufacturing the large square nut for the automobile chassis connecting system.
The large square nut for the automobile chassis connecting system can be formed in one step by adopting a multi-station cold extrusion forming technology through reasonable step arrangement, the material is saved, the process steps are few, only inner hole tapping is needed in the subsequent process, the material can be saved by 11 percent, the production speed can reach 60 PCS/min, the average daily output is 28800PCS, the production cost is reduced by more than 50 percent, and the waste of manpower and materials is reduced. The cold extrusion molding product has the advantages of smooth surface, size precision control, stable product quality, firmer structure, high use safety, strong bearing capacity, quickness and easiness in installation and the like. The product is widely applied to the chassis connecting system of high-grade automobiles.
Drawings
FIG. 1 is a flow chart of the production process of the present invention.
Fig. 2, 3, 4 and 5 are top views of a molded product No. three, a molded product No. four, a molded product No. five and a molded product No. six, respectively.
Detailed Description
Reference is made to the accompanying drawings. The invention relates to a manufacturing method of a large square nut for an automobile chassis connecting system, which comprises a fillet square nut head 101, a cylindrical part 102 at the lower part of the fillet square nut head, a central hole 103 of the nut penetrates through the cylindrical part 102 and the fillet square nut head 101, the length L of a diagonal line of the fillet square nut head 101 is 1.8-2.2 times of the diameter D of the cylindrical part 102, the length L of the diagonal line is the length of a connecting line between the vertexes of the diagonal arcs, the fillet square nut head 101 is in a thin plate structure, the ratio of the length H of the cylindrical part to the thickness T of the fillet square nut head is 3.5-4.5, and axial grooves 104 are arranged in the middle parts of two opposite sides of the fillet square nut head 101.
Annealing the plate raw material, then performing phosphate surface treatment, fine drawing and sizing treatment, and then performing the following steps:
(1) and automatically shearing the disc material into single raw material pieces 100a by feeding the disc material into a cold heading forming machine through a feeding wheel, wherein the diameter of the disc material is basically consistent with that of the cylindrical part 102, and the length dimension of the raw material pieces 100a is larger than the height dimension of the large square nut 100.
(2) Transferring the raw material part 100a into a first die opening of a cold heading forming machine, ejecting the raw material part 100a into a first die concave die by a punching tool at the front end of the first die, and performing cold heading manufacturing in the first die to ensure that the front end of a first molded finished product 1 is headed out of a positioning hole 11 and the rear end is headed out of an arc angle 12 on the basis of the raw material part 100 a;
(3) the first molded finished product 1 is translated to a second mold opening, the first molded finished product 1 is pushed into a second mold concave die by a punching tool at the front end of the second mold, and the front end of the second molded finished product is upset out of a counter bore 21 and the rear end is contracted 22 through cold heading in the second mold; the depth of the counter bore 21 is consistent with the height H of the cylindrical part, the wall thickness of the counter bore 21 is consistent with the wall thickness of a central hole of the cylindrical part, and a second molded finished product 2 is manufactured.
(4) And the second molded finished product 2 is overturned and moved to a third mold opening, the second molded finished product 2 is pushed into a third mold concave die by a punching tool at the front end of the third mold, the third molded finished product 3 is manufactured by cold upsetting in the third mold, the front end of the third molded finished product 3 forms a prepared shape of a fillet tetragonal nut head 101 of the large tetragonal nut by using the shrinkage 22 in the second molded finished product 2 and the part outside the axial sunk hole depth, the third molded finished product 3 is arranged at the lower part of the prepared shape, and the automobile chassis connecting system is formed by upsetting the cylindrical part 101 of the large tetragonal nut and the central hole 103b thereof (namely the section of the central hole 103 in the cylindrical part) and keeps the shape in the subsequent cold extrusion process.
The cross-sectional outer contour shape 32 of the preliminary-shape body 31 is identical with but slightly reduced from that of a round-corner square nut head, the thickness T1 of the preliminary-shape body 31 is slightly thicker than that of the round-corner square nut head, the front end of the preliminary-shape body 31 is upset to form a positioning hole 33, and convex block configurations 34 are respectively arranged at four corners of the front end of the body 31, so that a third molded product 3 is manufactured.
(5) And translating the third molded finished product 3 to a fourth mold opening, pushing the third molded finished product 3 into a fourth mold concave die by a punch at the front end of the fourth mold, forming a fillet square nut head prototype 41 with the cross section outer contour size and the thickness of the fillet square nut head at the front end of the fourth molded finished product 4 through cold upsetting in the fourth mold, but not having the axial groove 104, pressing and compacting a part 42 of the fillet square nut head prototype 41 of the fourth molded finished product, which is positioned outside the cylindrical part in the radial direction, by utilizing the convex block configuration 34 at the four corners of the third molded finished product, further upsetting the hole on the basis of the positioning hole of the third molded finished product, and manufacturing the fourth molded finished product 4 by using a repeated drawing 43 as a hole after upsetting.
(6) The fourth molded finished product 4 is translated to a fifth mold opening, the fourth molded finished product 4 is pushed into a fourth mold concave die by a punching tool at the front end of the fifth mold, the fourth molded finished product is manufactured by cold heading in the fifth mold, a fillet square nut blank 41 of the fourth molded finished product 4 is cold extruded out of the axial groove 104 on two opposite sides of the fillet square nut blank, and a fifth molded finished product 5 is manufactured, wherein the fillet square nut blank which is not penetrated through a central hole at the front end of the fifth molded finished product is not shown by a reference numeral 51, and the blank 51 is the same as the fillet square nut 101 of the large square nut 100 for the automobile chassis connecting system except that the blank is not penetrated through the central hole.
(7) And translating the fifth molded finished product 5 to a sixth mold, and carrying out iron core passing 61, through hole 43 and central hole 103b on the fifth molded finished product to form a central hole 104 of the nut so as to manufacture the large square nut 100 for the automobile chassis connecting system.
The above description is only an embodiment of the present invention, but the structural features of the present invention are not limited thereto, and any changes or modifications within the scope of the present invention by those skilled in the art are covered by the present invention.

Claims (1)

1. The manufacturing method of the large square nut for the automobile chassis connecting system is characterized in that the large square nut for the automobile chassis connecting system comprises a fillet square nut head and a cylindrical part at the lower part of the fillet square nut head, a central hole of the nut penetrates through the cylindrical part and the fillet square nut head, the length of a diagonal line of the fillet square nut head is 1.8-2.2 times of the diameter of the cylindrical part, the fillet square nut head is of a thin plate structure, the ratio of the length of the cylindrical part to the thickness of the fillet square nut head is 3.5-4.5, and axial grooves are formed in the middle parts of two opposite sides of the fillet square nut head;
the manufacturing method comprises the following steps:
(1) feeding the disc round material into a cold heading forming machine through a feeding wheel to automatically shear the disc round material into a single raw material piece, wherein the diameter of the disc round material is basically consistent with that of the cylindrical part, and the length dimension of the raw material piece is larger than the height dimension of the large square nut;
(2) the raw material piece is moved into a first die opening of a cold heading forming machine, the raw material piece is ejected into a first die concave die by a punching tool at the front end of the first die, and a first molded finished product is manufactured by cold heading in the first die, wherein a positioning hole is formed in the front end of the first molded finished product on the basis of the raw material piece, and an arc angle is formed in the rear end of the first molded finished product;
(3) the first molded finished product is translated to a second mold opening, the first molded finished product is pushed into a second mold concave die by a punching tool at the front end of the second mold, and the front end of the second molded finished product is upset into a counter bore and the rear end is contracted through cold heading in the second mold; the depth of the counter bore is consistent with the height of the cylindrical part, the wall thickness of the counter bore is consistent with the wall thickness of a central hole of the cylindrical part, and a second molded finished product is manufactured;
(4) turning over the second molded finished product and moving the second molded finished product to a third mold opening, ejecting the second molded finished product into a third mold concave die by a punching tool at the front end of the third mold, and forming a preparation shape of a fillet square nut head of the large square nut by cold heading at the front end of the third molded finished product through cold heading in the third mold, at the lower part of the preliminary shape, the automobile chassis connection system is formed by upsetting the cylindrical portion of the large square nut and the center hole thereof, the cross-sectional outer contour shape of the prepared-shape main body is consistent with but slightly reduced from that of the round-corner square nut head, the thickness of the preliminary-shaped body is slightly thicker than that of the round-corner square nut head, the front end of the preliminary-shaped body is upset to form a positioning hole, the four corners of the front end of the main body are respectively provided with a convex block structure to manufacture a third molded finished product;
(5) the third molded finished product is translated to a fourth mold opening, the third molded finished product is pushed into a fourth mold concave die by a punching tool at the front end of the fourth mold, and the fourth molded finished product is manufactured by cold upsetting in the fourth mold, so that the front end of the fourth molded finished product forms a fillet square nut head prototype with the cross section outer contour size and the thickness of the fillet square nut head, but does not have the axial groove, and the fillet square nut head prototype of the fourth molded finished product is extruded and compacted at the part, which is radially positioned outside the cylindrical part, of the fillet square nut head prototype by utilizing the convex block configuration of four corners of the third molded finished product to manufacture the fourth molded finished product;
(6) the fourth molded finished product is horizontally moved to a fifth mold opening, the fourth molded finished product is pushed into a fourth mold concave die by a punching tool at the front end of the fifth mold, and the fillet square nut head prototype of the fourth molded finished product is subjected to cold extrusion to form the axial groove on two opposite edges of the fillet square nut head prototype through cold heading manufacturing in the fifth mold, so that the fifth molded finished product is manufactured;
(7) and translating the fifth molded finished product to a sixth mold, carrying out iron core penetration on the fifth molded finished product, penetrating and forming a central hole of the nut, and manufacturing the large square nut for the automobile chassis connecting system.
CN201910805643.6A 2019-08-29 2019-08-29 Manufacturing method of large square nut for automobile chassis connecting system Active CN110586845B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910805643.6A CN110586845B (en) 2019-08-29 2019-08-29 Manufacturing method of large square nut for automobile chassis connecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910805643.6A CN110586845B (en) 2019-08-29 2019-08-29 Manufacturing method of large square nut for automobile chassis connecting system

Publications (2)

Publication Number Publication Date
CN110586845A true CN110586845A (en) 2019-12-20
CN110586845B CN110586845B (en) 2021-03-23

Family

ID=68856178

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910805643.6A Active CN110586845B (en) 2019-08-29 2019-08-29 Manufacturing method of large square nut for automobile chassis connecting system

Country Status (1)

Country Link
CN (1) CN110586845B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111390083A (en) * 2020-03-23 2020-07-10 鹏驰五金制品(昆山)有限公司 Automobile nut forming process

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2254199C1 (en) * 2003-12-22 2005-06-20 Открытое акционерное общество "Белебеевский завод "Автонормаль" Method for making self-locking nuts blanks with nylon ring and flange
CN101618421A (en) * 2009-07-17 2010-01-06 宁波安拓实业有限公司 Multi-station cold-heading molding method of clutch conical blank
CN101618498A (en) * 2009-07-17 2010-01-06 宁波安拓实业有限公司 Manufacturing process of adjusting nut
CN101648228A (en) * 2009-08-27 2010-02-17 浙江拓进五金工具有限公司 Multi-station cold extruding forming method of sleeve barrel
CN102059306A (en) * 2010-11-19 2011-05-18 宁波安拓实业有限公司 Multi-station cold heading manufacturing method for plate die adjusting seat blank
CN102125943A (en) * 2010-11-29 2011-07-20 宁波安拓实业有限公司 Manufacturing process of hose coupling
CN106180503A (en) * 2016-08-29 2016-12-07 苏州工业园区新凯精密五金有限公司 The cold-heading molding technique of a kind of self-clinching nut and the mould structure of forming embossing tooth thereof
CN106475504A (en) * 2015-08-25 2017-03-08 上海精拓模具制造有限公司 A kind of one-shot forming technique of employing Huff die cold-heading I-shaped product with holes
CN109513874A (en) * 2018-12-29 2019-03-26 苏州工业园区新凯精密五金有限公司 It is a kind of for manufacturing the cold-heading molding technique and cold heading die group of tetragonal pyramid bottom nut
CN109848361A (en) * 2019-03-20 2019-06-07 宁波安拓实业有限公司 The manufacturing method of automobile T-type ellipse inner sleeve blank

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2254199C1 (en) * 2003-12-22 2005-06-20 Открытое акционерное общество "Белебеевский завод "Автонормаль" Method for making self-locking nuts blanks with nylon ring and flange
CN101618421A (en) * 2009-07-17 2010-01-06 宁波安拓实业有限公司 Multi-station cold-heading molding method of clutch conical blank
CN101618498A (en) * 2009-07-17 2010-01-06 宁波安拓实业有限公司 Manufacturing process of adjusting nut
CN101648228A (en) * 2009-08-27 2010-02-17 浙江拓进五金工具有限公司 Multi-station cold extruding forming method of sleeve barrel
CN102059306A (en) * 2010-11-19 2011-05-18 宁波安拓实业有限公司 Multi-station cold heading manufacturing method for plate die adjusting seat blank
CN102125943A (en) * 2010-11-29 2011-07-20 宁波安拓实业有限公司 Manufacturing process of hose coupling
CN106475504A (en) * 2015-08-25 2017-03-08 上海精拓模具制造有限公司 A kind of one-shot forming technique of employing Huff die cold-heading I-shaped product with holes
CN106180503A (en) * 2016-08-29 2016-12-07 苏州工业园区新凯精密五金有限公司 The cold-heading molding technique of a kind of self-clinching nut and the mould structure of forming embossing tooth thereof
CN109513874A (en) * 2018-12-29 2019-03-26 苏州工业园区新凯精密五金有限公司 It is a kind of for manufacturing the cold-heading molding technique and cold heading die group of tetragonal pyramid bottom nut
CN109848361A (en) * 2019-03-20 2019-06-07 宁波安拓实业有限公司 The manufacturing method of automobile T-type ellipse inner sleeve blank

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111390083A (en) * 2020-03-23 2020-07-10 鹏驰五金制品(昆山)有限公司 Automobile nut forming process

Also Published As

Publication number Publication date
CN110586845B (en) 2021-03-23

Similar Documents

Publication Publication Date Title
CN101961829B (en) Bolt molding process requiring chamfering and milling multiple grooves
CN103230950B (en) Spline gear cold-extruded one-shot forming apparatus
CN201064816Y (en) Special-purpose hinge pin bolt forming die
CN103212600B (en) Manufacture method of inner sleeve
CN104646581B (en) A kind of super large head bolt of long stem manufacture method and mould structure
CA1081438A (en) Press forming of flanged articles
CN102672096B (en) Precision die forging and shaping technical method for automobile steering knuckle rough type parts
CN202137312U (en) Cold-extrusion die for output spline shaft of automobile automatic transmission
CN101780628B (en) Processing process for compressing and riveting nuts
CN201684773U (en) Mould for forming disc type forgings
CN101474642B (en) Multiway shaping method of magnesium alloy wheel and mold
CN101693264B (en) Large equal channel angular large-strain extrusion die
CN106862475B (en) The cold upsetting production technique of interior hexagonal studs blank
CN101332489B (en) Cold-forging precise forming technique of gear sleeve
CN103624502A (en) Cold-forging plastic molding technology of brake piston
CN103212635B (en) Car transmission synchronizer gear ring fine blanking and deep drawing combined forming process and mold
CN102699632B (en) Process for manufacturing lining blank of damper
CN106180503A (en) The cold-heading molding technique of a kind of self-clinching nut and the mould structure of forming embossing tooth thereof
CN204396767U (en) Bullet train wheel forging and molding mold
CN106903251A (en) Through hole sleeve metal parts cold upsetting production technique long
CN103056179B (en) Warm extrusion forming method for straight toothed spur gear
CN103111483A (en) High-modulus straight-tooth cylindrical gear cold extrusion technology and special die thereof
CN101947567B (en) Processing technique of flat-head hexagon bolt for cold extrusion shaping cart
CN106623611B (en) A kind of combined shaping method of the depth bipyramid with top dome shape thin-wall part
CN108580622B (en) Design method of in-mold radial extrusion forming process of I-shaped longitudinal rib ring piece

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant