CN108723275B - Combined die for eccentric bolt processing - Google Patents
Combined die for eccentric bolt processing Download PDFInfo
- Publication number
- CN108723275B CN108723275B CN201810821558.4A CN201810821558A CN108723275B CN 108723275 B CN108723275 B CN 108723275B CN 201810821558 A CN201810821558 A CN 201810821558A CN 108723275 B CN108723275 B CN 108723275B
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- die
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- die core
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- 238000007493 shaping process Methods 0.000 claims abstract description 148
- 239000011265 semifinished product Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 230000003068 static effect Effects 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 claims description 2
- PPASLZSBLFJQEF-RKJRWTFHSA-M sodium ascorbate Substances [Na+].OC[C@@H](O)[C@H]1OC(=O)C(O)=C1[O-] PPASLZSBLFJQEF-RKJRWTFHSA-M 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
Abstract
The invention discloses a combined die for processing an eccentric bolt, which is characterized by comprising the following components: the first cold heading die is used for shaping the wire rod blank for manufacturing the eccentric bolt into a first semi-finished product blank with a conical head; the second cold heading die is used for shaping the head of the first semi-finished blank into a spherical second semi-finished blank; the third cold heading die is used for flattening the spherical shape of the second semi-finished blank and knurling the screw rod, and forming a first groove and a second groove to form a third semi-finished blank; the fourth cold heading die is used for shaping the head of the third semi-finished blank into a hexagon to form an eccentric bolt.
Description
Technical Field
The invention relates to a fastener processing die, in particular to a combined die for processing an eccentric bolt.
Background
Eccentric bolts are a common type of vehicle fastener that can be used to adjust the inclination of a vehicle tire to maintain balanced running of the vehicle. The eccentric bolt generally comprises a bolt head and a screw rod, a first groove and a second groove are formed in the end portion of the screw rod along the axial direction of the screw rod, the first groove and the second groove are oppositely arranged, an eccentric gasket is sleeved on the eccentric bolt, and the installation hole of the eccentric gasket is matched with the shape of the screw rod, so that the eccentric bolt is not easy to deflect and incline after the eccentric gasket is sleeved.
However, in the prior art, the first groove and the second groove of the eccentric bolt are all required to be milled through a milling machine, so that the material utilization rate is low, the processing efficiency is low, the process is complex, the cost is high, and the traditional machining process does not have a competitive advantage at present with strong market competition.
Disclosure of Invention
In view of the technical problems in the background art, the technical problems solved by the invention aim to provide a die for processing an eccentric bolt, which can realize one-step forming of the eccentric bolt through a cold heading process and improve the production efficiency.
In order to solve the technical problems, the invention adopts the following technical scheme: the combined die for processing the eccentric bolt is characterized by comprising:
the first cold heading die is used for shaping the wire rod blank for manufacturing the eccentric bolt into a first semi-finished product blank with a conical head;
the second cold heading die is used for shaping the head of the first semi-finished blank into a spherical second semi-finished blank;
the third cold heading die is used for flattening the spherical shape of the second semi-finished blank and knurling the screw rod, and forming a first groove and a second groove to form a third semi-finished blank;
the fourth cold heading die is used for shaping the head of the third semi-finished blank into a hexagon so as to form an eccentric bolt;
the conveying mechanism is used for conveying the wire stock to a first cold heading die, conveying the first semi-finished product stock to a second cold heading die, conveying the second semi-finished product stock to a third cold heading die and conveying the third semi-finished product stock to a fourth cold heading die;
the first cold heading die comprises a first movable die and a first static die, wherein the first movable die is provided with a push rod and a shaping die core A, the shaping die core A is provided with a shaping cavity A with an inclined conical surface, the push rod extends into the shaping cavity A from the rear end of the first movable die, a first push rod and a shaping die core B are arranged in the first static die, the shaping die core B is provided with a shaping cavity B for accommodating a screw rod and pre-shaping the screw rod, the first push rod extends into the shaping cavity B from the rear end of the first static die, and the shaping die core A and the shaping die core B are oppositely arranged;
the second cold heading die comprises a second movable die and a second static die, the second movable die is provided with a shaping die core C, the front end face of the shaping die core C is provided with an arc-shaped groove, a second push rod and a shaping die core D are arranged in the second static die, the shaping die core D is provided with a shaping cavity D used for accommodating a screw rod and conducting angle guiding on the bottom end of the screw rod, the second push rod extends into the shaping cavity D from the rear end of the second static die, and the shaping die core C and the shaping die core D are arranged oppositely;
the third cold heading die comprises a third movable die and a third static die, the third movable die is provided with a shaping die core E, the front end face of the shaping die core E is provided with a concave groove, the third movable die is provided with a third push rod and a shaping die core F, the shaping die core is provided with a front die core and a rear die core, the front die core is provided with a shaping cavity F for knurling a screw rod, the rear die core is provided with a shaping cavity F 'for opening a first groove and a second groove for the screw rod, the third push rod extends into the shaping cavity F' from the rear end of the third static die, and the shaping die core E and the shaping die core F are oppositely arranged;
the fourth cold heading mould includes fourth movable mould and fourth static mould, the fourth movable mould is equipped with plastic mold core G, plastic mold core G is equipped with and is arranged in the shaping chamber G that is hexagonal with screw rod head plastic, plastic mold core G front end is equipped with lead angle A, fourth static mould is equipped with fourth push rod and plastic mold core H, plastic mold core H is equipped with and is used for holding the screw rod and carries out the shaping chamber H of smart plastic to the screw rod, plastic mold core H front end is equipped with lead angle B, lead angle A and lead angle B mutually support and lead the waste material, the fourth push rod is stretched into in the shaping chamber H by fourth static mould rear end, plastic mold core G and plastic mold core H set up relatively.
The shaping mold core A, the shaping mold core B, the shaping mold core C, the shaping mold core D, the shaping mold core E, the shaping mold core F, the shaping mold core G and the shaping mold core H are made of hard alloy materials.
According to the invention, the wire stock is subjected to four-time cold heading molding through the four groups of cold heading dies, so that the material utilization rate is improved, the cost is reduced, the production efficiency is greatly improved, and the metal material can be subjected to proper plastic deformation during cold heading, so that the strength of the metal material can be increased compared with the processes of turning, milling and the like.
Drawings
FIG. 1 is a schematic illustration of an eccentric bolt process flow;
FIG. 2 is a schematic diagram of a first cold heading die structure;
FIG. 3 is a schematic diagram of a second cold heading die structure;
FIG. 4 is a schematic diagram of a third cold heading die structure;
fig. 5 is a schematic diagram of a fourth cold heading die structure.
Description of the embodiments
Referring to the drawings, the assembling die for eccentric bolt processing comprises: a first cold heading die 1 for shaping a wire rod blank 50 for manufacturing an eccentric bolt into a first semi-finished blank 51 with a conical head; a second cold heading die 2 for shaping the head of the first semi-finished blank into a spherical second semi-finished blank 52; a third cold heading die 3 for flattening the spherical shape of the second semi-finished blank and knurling the screw, and forming a first groove and a second groove to form a third semi-finished blank 53; a fourth cold heading die 4 for shaping the head of the third semi-finished blank into a hexagon so as to form an eccentric bolt 54; and the conveying mechanism is used for conveying the wire stock to the first cold heading die, conveying the first semi-finished product stock to the second cold heading die, conveying the second semi-finished product stock to the third cold heading die and conveying the third semi-finished product stock to the fourth cold heading die.
As shown in fig. 2, the first cold heading die 1 includes a first movable die 11 and a first static die 12, the first movable die 11 is provided with a push rod 101 and a shaping die core a102, the shaping die core a102 has a shaping cavity a with an inclined conical surface, the push rod 101 extends from the rear end of the first movable die 11 into the shaping cavity a, the first static die 12 is provided with a first push rod 103 and a shaping die core B104, the shaping die core B104 is provided with a shaping cavity B for accommodating and pre-shaping a screw, the first push rod 103 extends from the rear end of the first static die 12 into the shaping cavity B, the shaping die core a102 and the shaping die core B104 are oppositely arranged, the wire rod blank 50 is inserted into the first static die 12, the first movable die 11 and the first static die 12 move relatively until the push rod 101 abuts against the head of the bolt, the wire rod blank 50 is extruded and shaped to obtain a first semi-finished blank 51, the first push rod 103 pushes the first semi-finished blank 51 out of the first static die 12, and the conveying mechanism conveys the first semi-finished blank 51 to the second die 2.
As shown in fig. 3, the second cold heading die 2 includes a second movable die 21 and a second static die 22, the second movable die 21 is provided with a shaping die core C201, the front end surface of the shaping die core C201 is provided with an arc groove, the second static die 22 is provided with a second push rod 202 and a shaping die core D203, the shaping die core D203 is provided with a shaping cavity D for accommodating a screw and forming a lead angle at the bottom end of the screw, the second push rod 202 extends into the shaping cavity D from the rear end of the second static die 22, the shaping die core C201 is disposed opposite to the shaping die core D203, the first semi-finished blank 51 is inserted into the second static die 22, the second movable die 21 moves opposite to the second static die 22, the shaping die core C201 extrudes the head of the first semi-finished blank 51, so that the head of the first semi-finished blank 51 is shaped along the arc groove of the shaping die core C201, the screw part of the first semi-finished blank 51 is shaped along the shape of the shaping cavity D203, so as to obtain a second semi-finished blank 52 with a spherical head and a lead angle, the second semi-finished blank 52 is pushed out by the second push rod 202, and the second semi-finished blank 52 is transferred to the third static die 52.
As shown in fig. 4, the third cold heading die 3 comprises a third movable die 31 and a third static die 32, the third movable die 31 is provided with a shaping die core E301, the front end surface of the shaping die core E301 is provided with a concave groove, the third static die 32 is provided with a third push rod 302 and a shaping die core F303, the shaping die core F303 is provided with a front die core 3031 and a rear die core 3032, the front die core 3031 is provided with a shaping cavity F for knurling a screw rod, the rear die core 3032 is provided with a shaping cavity F ' for forming a first groove and a second groove on the screw rod, the third push rod 302 extends into the shaping cavity F ' from the rear end of the third static die 32, the shaping die core E301 and the shaping die core F303 are oppositely arranged, the second semi-finished blank 52 is inserted into the third static die 32, the third movable die 31 and the third static die 32 move relatively, the shaping die core E301 extrudes the head of the second semi-finished blank 52, the head of the second semi-finished blank 52 is shaped along the arc-shaped groove of the shaping die core E301, the top of the screw of the second semi-finished blank 52 is shaped along the shape of the forming cavity F, the lower part of the screw of the second semi-finished blank 52 is shaped along the shape of the forming cavity F ', so as to obtain a third semi-finished blank 53 with the head flattened, knurled on the top of the screw and the lower part of the screw provided with the first groove and the second groove, the shaped third push rod 302 pushes the third semi-finished blank 53 out of the third static die 32, and the conveying mechanism conveys the third semi-finished blank 53 to the fourth cold heading die 4.
As shown in fig. 5, the fourth cold heading die 4 includes a fourth movable die 41 and a fourth static die 42, the fourth movable die 41 is provided with a shaping die core G401, the shaping die core G401 is provided with a shaping cavity G402 for shaping the head of the screw into a hexagon, in this embodiment, the inner diameter of the shaping cavity G402 gradually decreases from back to front, the front end of the shaping die core G is provided with a guide angle a405, the fourth static die 42 is provided with a fourth push rod 403 and a shaping die core H404, the shaping die core H404 is provided with a shaping cavity H for accommodating the screw and performing fine shaping on the screw, the front end of the shaping die core H is provided with a guide angle B406, the guide angle a405 and the guide angle B406 are mutually matched to guide scraps, that is, the scraps cut off from the head of the screw are discharged, the fourth push rod 403 extends into the shaping cavity H from the rear end of the fourth static die 42, the shaping die core G401 and the die core H404 are relatively arranged, the third semi-finished blank 53 is inserted into the fourth static die 42, the fourth movable die 41 and the fourth static die 42 moves relatively to the fourth static die 42, the third semi-finished blank 53 is pushed out of the head of the hexagon, and the shaping die 53 is eccentric, and the head of the fourth semi-finished blank 53 is shaped into the head of the hexagon, and the head of the shaping die 53 is obtained, and the head of the fourth semi-finished blank 53 is eccentric, and the head of the shaping blank 53 is shaped and the head of the shaped blank is made to be eccentric, and the head of the shaped.
In the technical scheme, the opposite surface of the movable die and the static die is the front, and the opposite surface is the back.
The shaping mold core A, the shaping mold core B, the shaping mold core C, the shaping mold core D, the shaping mold core E, the shaping mold core F, the shaping mold core G and the shaping mold core H are made of hard alloy materials, and the hard alloy materials are high in hardness and wear-resistant and can improve the shaping quality of bolts.
Claims (2)
1. The combined die for processing the eccentric bolt is characterized by comprising:
the first cold heading die is used for shaping the wire rod blank for manufacturing the eccentric bolt into a first semi-finished product blank with a conical head;
the second cold heading die is used for shaping the head of the first semi-finished blank into a spherical second semi-finished blank;
the third cold heading die is used for flattening the spherical shape of the second semi-finished blank and knurling the screw rod, and forming a first groove and a second groove to form a third semi-finished blank;
the fourth cold heading die is used for shaping the head of the third semi-finished blank into a hexagon so as to form an eccentric bolt;
the conveying mechanism is used for conveying the wire stock to a first cold heading die, conveying the first semi-finished product stock to a second cold heading die, conveying the second semi-finished product stock to a third cold heading die and conveying the third semi-finished product stock to a fourth cold heading die;
the first cold heading die comprises a first movable die and a first static die, wherein the first movable die is provided with a push rod and a shaping die core A, the shaping die core A is provided with a shaping cavity A with an inclined conical surface, the push rod extends into the shaping cavity A from the rear end of the first movable die, a first push rod and a shaping die core B are arranged in the first static die, the shaping die core B is provided with a shaping cavity B for accommodating a screw rod and pre-shaping the screw rod, the first push rod extends into the shaping cavity B from the rear end of the first static die, and the shaping die core A and the shaping die core B are oppositely arranged;
the second cold heading die comprises a second movable die and a second static die, the second movable die is provided with a shaping die core C, the front end face of the shaping die core C is provided with an arc-shaped groove, a second push rod and a shaping die core D are arranged in the second static die, the shaping die core D is provided with a shaping cavity D used for accommodating a screw rod and conducting angle guiding on the bottom end of the screw rod, the second push rod extends into the shaping cavity D from the rear end of the second static die, and the shaping die core C and the shaping die core D are arranged oppositely;
the third cold heading die comprises a third movable die and a third static die, the third movable die is provided with a shaping die core E, the front end face of the shaping die core E is provided with a concave groove, the third movable die is provided with a third push rod and a shaping die core F, the shaping die core is provided with a front die core and a rear die core, the front die core is provided with a shaping cavity F for knurling a screw rod, the rear die core is provided with a shaping cavity F 'for opening a first groove and a second groove for the screw rod, the third push rod extends into the shaping cavity F' from the rear end of the third static die, and the shaping die core E and the shaping die core F are oppositely arranged;
the fourth cold heading mould includes fourth movable mould and fourth static mould, the fourth movable mould is equipped with plastic mold core G, plastic mold core G is equipped with and is arranged in the shaping chamber G that is hexagonal with screw rod head plastic, plastic mold core G front end is equipped with lead angle A, fourth static mould is equipped with fourth push rod and plastic mold core H, plastic mold core H is equipped with and is used for holding the screw rod and carries out the shaping chamber H of smart plastic to the screw rod, plastic mold core H front end is equipped with lead angle B, lead angle A and lead angle B mutually support and lead the waste material, the fourth push rod is stretched into in the shaping chamber H by fourth static mould rear end, plastic mold core G and plastic mold core H set up relatively.
2. The combination die for machining the eccentric bolt according to claim 1, wherein the shaping die core a, the shaping die core B, the shaping die core C, the shaping die core D, the shaping die core E, the shaping die core F, the shaping die core G and the shaping die core H are made of cemented carbide materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810821558.4A CN108723275B (en) | 2018-07-24 | 2018-07-24 | Combined die for eccentric bolt processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810821558.4A CN108723275B (en) | 2018-07-24 | 2018-07-24 | Combined die for eccentric bolt processing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108723275A CN108723275A (en) | 2018-11-02 |
| CN108723275B true CN108723275B (en) | 2023-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810821558.4A Active CN108723275B (en) | 2018-07-24 | 2018-07-24 | Combined die for eccentric bolt processing |
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| Country | Link |
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| CN (1) | CN108723275B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323100B (en) * | 2019-07-04 | 2021-03-16 | 深圳东洋旺和实业有限公司 | High-precision iron core processing equipment and corresponding iron core processing method |
| CN111570704A (en) * | 2020-05-12 | 2020-08-25 | 浙江明泰控股发展股份有限公司 | Mold assembly of eccentric adjusting bolt and molding method of eccentric adjusting bolt |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0833940A (en) * | 1994-07-22 | 1996-02-06 | Mitsutoyo Kiko Kk | Cold heading tool |
| KR20100005657A (en) * | 2009-03-23 | 2010-01-15 | 임기현 | A close type cold forging method and the device thereof for a sidegear of differential limitation equipment |
| CN102274916A (en) * | 2011-05-26 | 2011-12-14 | 浙江永华紧固件有限公司 | Special die assembly for cold upsetting of tapered wedge bolt |
| CN204603175U (en) * | 2015-02-11 | 2015-09-02 | 海盐富鑫高强度紧固件有限公司 | The cold upsetting forming die of deduction cap on a kind of perambulator |
| CN208495684U (en) * | 2018-07-24 | 2019-02-15 | 浙江裕泰汽车配件有限公司 | Eccentric bolt Combined mold for processing |
-
2018
- 2018-07-24 CN CN201810821558.4A patent/CN108723275B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0833940A (en) * | 1994-07-22 | 1996-02-06 | Mitsutoyo Kiko Kk | Cold heading tool |
| KR20100005657A (en) * | 2009-03-23 | 2010-01-15 | 임기현 | A close type cold forging method and the device thereof for a sidegear of differential limitation equipment |
| CN102274916A (en) * | 2011-05-26 | 2011-12-14 | 浙江永华紧固件有限公司 | Special die assembly for cold upsetting of tapered wedge bolt |
| CN204603175U (en) * | 2015-02-11 | 2015-09-02 | 海盐富鑫高强度紧固件有限公司 | The cold upsetting forming die of deduction cap on a kind of perambulator |
| CN208495684U (en) * | 2018-07-24 | 2019-02-15 | 浙江裕泰汽车配件有限公司 | Eccentric bolt Combined mold for processing |
Non-Patent Citations (1)
| Title |
|---|
| 高强度螺栓冷挤镦成形工艺及模具设计;田福祥;靳会洲;;锻压装备与制造技术(第01期);第67-69页 * |
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| Publication number | Publication date |
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| CN108723275A (en) | 2018-11-02 |
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