CN114226632A - Processing method of anti-collision bolt - Google Patents
Processing method of anti-collision bolt Download PDFInfo
- Publication number
- CN114226632A CN114226632A CN202210164620.3A CN202210164620A CN114226632A CN 114226632 A CN114226632 A CN 114226632A CN 202210164620 A CN202210164620 A CN 202210164620A CN 114226632 A CN114226632 A CN 114226632A
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- China
- Prior art keywords
- bolt
- head
- groove
- process groove
- injection molding
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Forging (AREA)
Abstract
The invention discloses a processing method of an anti-collision bolt, belonging to the technical field of machining and comprising the following steps: fixedly mounting the bolt on a cold press, starting the cold press to send the head of the bolt into a die cavity, extruding the bolt by the cold press to ensure that the thickness of the head of the bolt is equal, taking the bolt out of the die cavity, and cold-pressing a process groove on the end face of the head of the bolt; placing the head of the bolt in a cold pressing die, and uniformly extruding the peripheral wall of the head of the bolt to reduce the inner diameter and deepen the depth of the process groove; continuously and uniformly extruding the peripheral wall part of the head of the bolt, which is close to the opening of the process groove, so that the process groove forms a necking; and (4) injecting the plastic into the process groove, filling the process groove with the injection liquid, and then forming the injection molding piece. According to the invention, the process groove is formed on the end face of the head of the bolt, and the inner diameter of the process groove is linearly reduced from the groove bottom to the groove opening, so that the connection between an injection molding part formed by injection molding and the bolt is ensured, and the consistency between the injection molding part and the bolt is ensured.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a machining method of an anti-collision bolt.
Background
Present bolt is accomplishing fixed back, often can receive external stress's influence, and then slowly take place not hard up, in order to solve the problem that the bolt is strikeed, can set up anticollision piece on the terminal surface of the head of bolt, absorb external impact through anticollision piece to play the purpose of protection bolt, but present injection molding often is through the rigid coupling on the bolt, for example through welding etc. the wholeness between injection molding and the bolt is relatively poor, the life of injection molding is shorter.
Disclosure of Invention
Aiming at the existing problems, the invention aims to provide a processing method of an anti-collision bolt, wherein a process groove is formed in the end face of the head of the bolt, and the inner diameter of the process groove is linearly reduced from the groove bottom to the groove opening, so that the connection between an injection molding part formed by injection molding and the bolt is realized, and the consistency between the injection molding part and the bolt is ensured.
The specific technical scheme is as follows: a processing method of an anti-collision bolt comprises the following steps: (1) fixedly mounting the bolt on a cold press, starting the cold press to send the head of the bolt into a die cavity, extruding the bolt by the cold press to ensure that the thickness of the head of the bolt is uniform, taking the bolt out of the die cavity, and cold-pressing a process groove on the end face of the head of the bolt; (2) placing the head of the bolt in a cold pressing die, and uniformly extruding the peripheral wall of the head of the bolt to reduce the inner diameter and deepen the depth of the process groove; (3) continuing to uniformly press a peripheral wall portion of the head of the bolt, which is close to the opening of the process groove, so that the process groove forms a necking; (4) injecting the plastic into the process groove, filling the interior of the process groove with injection liquid, and then forming an injection molding piece; (5) and uniformly extruding the peripheral wall of the injection molding part to form the injection molding part with uniform thickness on the end face of the head part of the bolt.
In the processing method of the anti-collision bolt, in the step (1), the process groove is cold-pressed on the end face of the head of the bolt by using a cold-pressing punch.
According to the processing method of the anti-collision bolt, the cold pressing punch is cylindrical.
In the processing method of the anti-collision bolt, in the step (4), after the injection molded part is formed, a cold press is used for extruding the injection molded part on the outer side surface, and an interference groove is formed on the end surface of the head of the bolt.
In the processing method of the anti-collision bolt, in the step (2), the inner diameter of the process groove is linearly changed.
In the above processing method of the anti-collision bolt, in the step (4), the interference groove is annular.
In the processing method of the anti-collision bolt, the inner diameter of the interference groove is not less than the outer diameter of the opening of the process groove in the step (2).
In the processing method of the anti-collision bolt, the axis of the process groove coincides with the axis of the interference groove.
In the processing method of the anti-collision bolt, the material of the injection molding piece is black PA 66.
In the processing method of the anti-collision bolt, the screw rod of the bolt is provided with the tool withdrawal groove.
Compared with the prior art, the technical scheme has the positive effects that: according to the invention, the process groove is formed on the end face of the head of the bolt, and the inner diameter of the process groove is linearly reduced from the groove bottom to the groove opening, so that the connection between the injection molding part formed by injection molding and the bolt is ensured, the consistency between the injection molding part and the bolt is ensured, and the service life of the injection molding part is prolonged.
Drawings
FIG. 1 is a first state diagram of a method of manufacturing an impact bolt according to the present invention;
FIG. 2 is a second state diagram of a method of manufacturing an impact bolt according to the present invention;
FIG. 3 is a third state diagram of a method of manufacturing an impact bolt according to the present invention;
FIG. 4 is a fourth state diagram of a method of manufacturing an impact bolt according to the present invention;
FIG. 5 is a fifth state diagram of a method of manufacturing an impact bolt according to the present invention;
FIG. 6 is a sixth state view of a method of manufacturing an impact bolt according to the present invention;
fig. 7 is a seventh state diagram of a method for processing an anti-collision bolt according to the present invention.
In the drawings: 1. A bolt; 2. an injection molded part; 3. a process tank; 4. an interference groove; 5. a tool withdrawal groove; 6. glue falling resistance; 7. cold pressing the punch; 8. briquetting; 9. and (5) cold pressing the die.
Detailed Description
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
Fig. 1 is a first state diagram of a method for processing an impact bolt according to the present invention, fig. 2 is a second state diagram of a method for processing an impact bolt according to the present invention, fig. 3 is a third state diagram of a method for processing an impact bolt according to the present invention, fig. 4 is a fourth state diagram of a method for processing an impact bolt according to the present invention, fig. 5 is a fifth state diagram of a method for processing an impact bolt according to the present invention, fig. 6 is a sixth state diagram of a method for processing an impact bolt according to the present invention, fig. 7 is a seventh state diagram of a method for processing an impact bolt according to the present invention, as shown in fig. 1 to 7, illustrating a method for processing an impact bolt 1 according to a preferred embodiment, including the steps of: the first step is as follows: as shown in fig. 1 and 2, the bolt 1 is fixedly installed on a cold press, the cold press is started to send the head of the bolt 1 into a die cavity, the cold press uniformly extrudes the bolt 1 to make the head of the bolt 1 have equal thickness, the bolt 1 is taken out of the die cavity, a process groove 3 is cold-pressed on the end face of the head of the bolt 1, preferably, the process groove 3 is cold-pressed on the end face of the head of the bolt 1 by using a cylindrical cold-pressing punch 7, and the depth of the process groove 3 is preferably 10 mm; the second step is that: as shown in fig. 3 and 7, place the head of bolt 1 in cold pressing die, evenly extrude the perisporium of the head of bolt 1 for the internal diameter of technology groove 3 diminishes, the degree of depth deepens, use the extruder to extrude in the outside of the head of bolt 1, cold pressing film 9 guarantees to add the even stability of 1 head thickness of bolt man-hour, just can not run out deckle edge in finished product injection molding 2 production, overall structure guarantees not come unstuck, can realize outside the anticollision function, can improve batch production's yield. Preferably, the depth of the process groove after extrusion is 15 mm. Continuing to uniformly extrude the peripheral wall part of the head of the bolt 1 close to the opening of the process tank 3, so that the process tank 3 forms a necking; the third step: as shown in fig. 4, the injection molding liquid is injected into the process groove 3 and fills the process groove 3, and then the injection molded part 2 is formed; the fourth step: as shown in fig. 5, interference grooves 4 are formed on both ends of the injection-molded part 2 on the end surface of the head of the bolt 1, and preferably, the interference grooves 4 are annular. Then, the pressing block 8 uniformly extrudes the peripheral wall of the injection molding part 2 to form the injection molding part 2 with uniform thickness on the end face of the head part of the bolt 1; further, as a preferred embodiment, the inner diameter of the process groove 3 changes linearly, and the inner diameter of the process groove 3 decreases linearly from the groove bottom to the groove opening, so that the opening of the process groove 3 is in a contracted shape, and the injection molded part 2 is not easy to be separated from the process groove 3 after being molded in the process groove 3, thereby protecting the head of the bolt 1.
Further, as a preferred embodiment, the inner diameter of the interference groove 4 is not smaller than the outer diameter of the opening of the process groove 3 in the step (2).
Further, as a preferred embodiment, the axis of the process groove 3 coincides with the axis of the interference groove 4.
Further, as a preferred embodiment, the material of the injection-molded part 2 is black PA 66.
Further, as a preferred embodiment, as shown in fig. 6 and 7, a relief groove 5 is formed on the screw of the bolt 1.
The above are merely preferred embodiments of the present invention, and the embodiments and the protection scope of the present invention are not limited thereby.
The present invention also has the following embodiments in addition to the above: in a further embodiment of the present invention, please refer to fig. 1 to 7, a blue glue-dropping resistance 6 is disposed on the stud of the bolt 1, and the glue-dropping resistance 6 plays a role of preventing the bolt 1 from loosening.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. The processing method of the anti-collision bolt is characterized by comprising the following steps: (1) fixedly mounting the bolt on a cold press, starting the cold press to send the head of the bolt into a die cavity, extruding the bolt by the cold press to ensure that the thickness of the head of the bolt is uniform, taking the bolt out of the die cavity, and cold-pressing a process groove on the end face of the head of the bolt; (2) placing the head of the bolt in a cold pressing die, and uniformly extruding the peripheral wall of the head of the bolt to reduce the inner diameter and deepen the depth of the process groove; (3) continuing to uniformly press a peripheral wall portion of the head of the bolt, which is close to the opening of the process groove, so that the process groove forms a necking; (4) injecting the plastic into the process groove, filling the interior of the process groove with injection liquid, and then forming an injection molding piece; (5) and uniformly extruding the peripheral wall of the injection molding part to form the injection molding part with uniform thickness on the end face of the head part of the bolt.
2. The method for processing the anti-collision bolt according to the claim 1, characterized in that in the step (1), the process groove is cold-pressed on the end face of the head of the bolt by using a cold-pressing punch.
3. A method of making an impact bolt as claimed in claim 2 wherein said cold press punch is cylindrical.
4. The method for processing an anti-collision bolt according to claim 1, wherein in the step (4), after the injection molding piece is formed, a cold press is used for extruding the injection molding piece on the outer side surface of the injection molding piece, and the interference groove is formed on the end surface of the head of the bolt.
5. The method for processing an anti-collision bolt according to claim 3, wherein in the step (2), the inner diameter of the process groove is linearly changed.
6. The method for processing an anti-collision bolt according to claim 4, wherein in the step (4), the interference groove is annular.
7. The method for processing an anti-collision bolt according to claim 6, wherein the inner diameter of the interference groove is not smaller than the outer diameter of the opening of the process groove in the step (2).
8. A method of machining an impact bolt as claimed in claim 6, wherein the axis of the process groove coincides with the axis of the interference groove.
9. The method for processing the anti-collision bolt according to claim 1, wherein the material of the injection molding piece is black PA 66.
10. A method for processing an anti-collision bolt according to claim 1, wherein a tool withdrawal groove is processed on a screw rod of the bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210164620.3A CN114226632B (en) | 2022-02-23 | 2022-02-23 | Processing method of anti-collision bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210164620.3A CN114226632B (en) | 2022-02-23 | 2022-02-23 | Processing method of anti-collision bolt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114226632A true CN114226632A (en) | 2022-03-25 |
| CN114226632B CN114226632B (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210164620.3A Active CN114226632B (en) | 2022-02-23 | 2022-02-23 | Processing method of anti-collision bolt |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012001904A1 (en) * | 2012-01-27 | 2013-08-01 | Heinz Grund | Method for equipping connecting element e.g. hexagonal bolt/screw, involves forming sectional contour by threaded shaft progressing in movement direction of tool to form undercut web contour that is injected into recess |
| KR101538586B1 (en) * | 2014-05-28 | 2015-07-21 | 현대위아 주식회사 | Injection moleded ball joint and manufacturing method thereof) |
| CN206338296U (en) * | 2016-12-23 | 2017-07-18 | 大进合紧固件（昆山）有限公司 | Applied to the fishbolt on car steering bar |
| CN111623021A (en) * | 2019-02-28 | 2020-09-04 | 长城汽车股份有限公司 | Adjusting bolt and vehicle |
| CN111940669A (en) * | 2020-08-06 | 2020-11-17 | 日泰（上海）汽车标准件有限公司 | Machining process for head groove of injection molding part |
| CN213145049U (en) * | 2020-08-14 | 2021-05-07 | 宁波敏达机电有限公司 | Back riveting type bolt |
-
2022
- 2022-02-23 CN CN202210164620.3A patent/CN114226632B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012001904A1 (en) * | 2012-01-27 | 2013-08-01 | Heinz Grund | Method for equipping connecting element e.g. hexagonal bolt/screw, involves forming sectional contour by threaded shaft progressing in movement direction of tool to form undercut web contour that is injected into recess |
| KR101538586B1 (en) * | 2014-05-28 | 2015-07-21 | 현대위아 주식회사 | Injection moleded ball joint and manufacturing method thereof) |
| CN206338296U (en) * | 2016-12-23 | 2017-07-18 | 大进合紧固件（昆山）有限公司 | Applied to the fishbolt on car steering bar |
| CN111623021A (en) * | 2019-02-28 | 2020-09-04 | 长城汽车股份有限公司 | Adjusting bolt and vehicle |
| CN111940669A (en) * | 2020-08-06 | 2020-11-17 | 日泰（上海）汽车标准件有限公司 | Machining process for head groove of injection molding part |
| CN213145049U (en) * | 2020-08-14 | 2021-05-07 | 宁波敏达机电有限公司 | Back riveting type bolt |
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| Publication number | Publication date |
|---|---|
| CN114226632B (en) | 2022-05-10 |
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Address after: 315000 No. 169, Linyu North Road, Jiaochuan, Zhenhai District, Ningbo City, Zhejiang Province Patentee after: Ningbo Ye Feng Machinery Co.,Ltd. Address before: 315000 floor 1-3, floor 2, building 1, No. 362, xianiqiao village, Xiaogang, Beilun District, Ningbo City, Zhejiang Province Patentee before: Ningbo Ye Feng Machinery Co.,Ltd. |