CN214557084U - Cold heading module for fastener - Google Patents
Cold heading module for fastener Download PDFInfo
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- CN214557084U CN214557084U CN202120189075.4U CN202120189075U CN214557084U CN 214557084 U CN214557084 U CN 214557084U CN 202120189075 U CN202120189075 U CN 202120189075U CN 214557084 U CN214557084 U CN 214557084U
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Abstract
The utility model discloses a cold-heading module for fastener, fastener include the body, and the one end of body is formed with straight pole portion, and the diameter of straight pole portion is not more than 4.7mm, and the cold-heading module includes: the first die is used for forming the wire into a preset straight section, and a groove is formed in the first end of the preset straight end; the second die is used for forming the preset straight section into the straight rod part with the groove; the third mold is used for forming an inner hole at the second end of the preset straight section; the fourth die is used for extruding and forming the preset straight section into a preset body; the fifth die is used for extruding and forming the preset body into a body with a flange part; each mould comprises a main mould thimble abutting against the first end, the end part of the main mould thimble is provided with a convex part, and the convex part is positioned in the groove matched with the convex part in the fastener processing process. This cold-heading module can guarantee the machining precision to the fastener location.
Description
Technical Field
The utility model relates to a fastener field of making especially relates to a cold-heading module for fastener.
Background
The cold heading process is one of the few new processes for non-cutting metal press working. The method is a processing method which utilizes the plastic deformation generated by metal under the action of external force and redistributes and transfers the volume of the metal by means of a die so as to form the required part or blank. The cold heading process is most suitable for producing standard fasteners such as bolts, screws, nuts, rivets, pins, and the like.
For some parts with smaller end diameters, when the part is moved between adjacent dies in the cold heading process, the end of the part cannot be well placed opposite to the ejector pin of the main die when the end of the part is contacted with the ejector pin of the main die. Therefore, in the whole machining process, the relative position of the part and the ejector pin of the main die in each die can be different, and the machining precision of the part is influenced.
Disclosure of Invention
In order to overcome the defect among the prior art, the embodiment of the utility model provides a cold-heading module for fastener, this module can play the positioning action to the fastener in the course of working, guarantees the machining precision of fastener.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a cold-heading module for fastener, the fastener includes the body, the one end of body is formed with straight pole portion, the diameter of straight pole portion is not more than 4.7mm, the cold-heading module includes:
the wire rod forming device comprises a first die, a second die and a third die, wherein the first die is used for forming a wire rod into a preset straight section, and a groove is formed at a first end of the preset straight section;
the second die is used for forming the straight rod part with the groove on the preset straight section;
a third die for forming an inner bore at a second end of the pre-set straight section;
a fourth die for extruding the preset straight section into a preset body;
a fifth die for extruding the preset body into the body with the flange part;
the first mold, the second mold, the third mold, the fourth mold and the fifth mold respectively comprise a main mold thimble abutting against the first end, a convex part is arranged at the end part of the main mold thimble, and the convex part is positioned in a groove matched with the convex part in the fastener machining process.
In the above technical solution, the convex portion is located in the middle of the main mold thimble, and the center line of the convex portion coincides with the center line of the main mold thimble.
In the above technical solution, the convex part is conical.
In the technical scheme, the diameter of the bottom surface of the convex part is 1.1-1.3 mm, and the height of the convex part is 0.5-0.7 mm.
In the above technical solution, the first mold, the second mold, the third mold, the fourth mold and the fifth mold each include a main mold and a punch mold that are correspondingly disposed;
the main die comprises a main die shell, a main die cushion block, a main die ejector pin and a main die core, wherein the main die cushion block, the main die ejector pin and the main die core are arranged in the main die shell;
the die comprises a die stamping shell, a die stamping cushion block and a die stamping thimble which are arranged in the die stamping shell, one end of the die stamping thimble is connected with the die stamping cushion block, and the other end of the die stamping thimble penetrates out of the die stamping shell to be opposite to the main die cavity.
In the above technical scheme, the ejector pins of the main molds of the first mold, the second mold and the third mold are externally sleeved with protective tubes.
In the above technical scheme, the third die, the fourth die and the fifth die are provided with push pipes externally sleeved on the ejector pins of the stamping die, and the stamping die is provided with a plurality of push pins connected with the push pipes.
The utility model discloses following beneficial effect has at least:
1. the utility model discloses in all be equipped with the convex part on the fundamental mode thimble of first mould, second mould, third mould, fourth mould and fifth mould, convex part in the first mould can be in the first end shaping recess of predetermineeing the straight section, when will predetermineeing the straight section again and remove to second mould, third mould, fourth mould and fifth mould in, the recess is relative with the convex part, makes the convex part can fix a position predetermineeing the straight section. The center line of the preset straight section in each die can be ensured to be positioned on the same straight line with the center line of the stamping ejector pin and the center line of the main die ejector pin, and the concentricity of the inner hole and the body is improved.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a cold heading module according to an embodiment of the present invention;
fig. 2 is a schematic view of an ejector pin of an embodiment of the present invention;
FIG. 3 is a partial enlarged view of the thimble end of the main mold according to the embodiment of the present invention;
fig. 4 is a schematic view of a third mold in an embodiment of the present invention;
FIG. 5 is a schematic view of a fastener manufacturing process according to an embodiment of the present invention;
fig. 6 is a schematic view of a fastener according to an embodiment of the present invention.
Reference numerals of the above figures: 1. a fastener; 11. a body; 12. a straight rod part; 13. presetting a straight section; 14. a groove; 15. an inner bore; 16. a flange portion; 2. a first mold; 3. a second mold; 4. a third mold; 5. a fourth mold; 6. a fifth mold; 71. performing primary molding; 711. a main formwork; 712. a main die cushion block; 713. a main die thimble; 7131. a convex portion; 714. a main mold core; 715. a main mold cavity; 72. punching a die; 721. punching a mould shell; 722. punching a thimble; 723. punching a cushion block; 724. protecting the pipe; 725. pushing the tube; 726. and (6) pushing the needle.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The first embodiment is as follows: referring to fig. 1-6, a cold heading die set for a fastener 1, the fastener 1 comprises a body 11, one end of the body 11 is formed with a straight rod part 12, the diameter of the straight rod part 12 is not more than 4.7mm, and the cold heading die set comprises:
the wire forming device comprises a first die 2, a second die 2 and a third die, wherein the first die 2 is used for forming a wire into a preset straight section 13, and a groove 14 is formed at a first end of the preset straight section 13;
a second die 3, wherein the second die 3 is used for forming the preset straight section 13 into the straight rod part 12 with the groove 14;
a third die 4, wherein the third die 4 is used for forming an inner hole 15 at the second end of the preset straight section 13;
a fourth die 5, wherein the fourth die 5 is used for extruding and forming the preset straight section 13 into a preset body 11;
a fifth die 6, wherein the fifth die 6 is used for extruding and forming the preset body 11 into the body 11 with a flange part 16;
the first mold 2, the second mold 3, the third mold 4, the fourth mold 5 and the fifth mold 6 each include a main mold thimble 713 abutting against the first end, a protrusion 7131 is disposed at an end of the main mold thimble 713, and the protrusion 7131 is located in the groove 14 matched with the protrusion during the process of machining the fastener 1.
The convex portions 7131 are arranged on the main mold thimbles 713 of the first mold 2, the second mold 3, the third mold 4, the fourth mold 5 and the fifth mold 6, so that in the process of forming the preset straight section 13 by cold heading of the wire rod, the groove 14 matched with the convex portions 7131 can be formed at the first end of the preset straight section 13. The provision of the recess 14 at the first end of the fastener 1 has no effect on the use of the fastener 1. When the preset straight section 13 is moved to another mold, the protrusion 7131 on the main mold thimble 713 can be positioned by using the groove 14, so that the preset straight section 13 can smoothly keep the same position to enter the main mold cavity 715, thereby ensuring the precision of subsequent processing.
Referring to fig. 2 and 3, the protrusion 7131 is located at the middle of the main mold pin 713, and the center line of the protrusion 7131 coincides with the center line of the main mold pin 713. The center line of the convex portion 7131 is coincided with the center line of the main mold ejector pin 713 and the center line of the die ejector pin 722, so that in the process of positioning the convex portion 7131 on the preset straight section 13, the center line of the preset straight section 13 can be coincided with the center line of the main mold ejector pin 713 and the center line of the die ejector pin 722, and therefore, in the process of machining the inner hole 15 at the second end of the preset straight section 13 by using the die ejector pin 722, the inner hole 15 is ensured to be positioned at the center of the preset straight section 13, and the concentricity of a product is improved. Due to the arrangement of the convex portion 7131, the center line of the preset straight section 13 and the center line of the die ejector pin 722 can be ensured to coincide in each die, so that the relative positions of the die ejector pin 722 and the inner hole 15 on the preset straight section 13 in each die are ensured to be the same, and the die ejector pin 722 is prevented from being broken in the machining process when the inner hole 15 and the die ejector pin 722 are staggered.
Preferably, the convex portion 7131 has a conical shape, the diameter of the bottom surface of the convex portion 7131 is 1.1mm to 1.3mm, and the height thereof is 0.5mm to 0.7 mm. The shape and size of the projection 7131 may be determined according to the size of the end surface of the fastener 1 opposite to the main mold pin 713.
Referring to fig. 1, each of the first mold 2, the second mold 3, the third mold 4, the fourth mold 5, and the fifth mold 6 includes a main mold 71 and a punch 72 that are disposed correspondingly;
the main mold 71 includes a main mold shell 711, a main mold cushion block 712, a main mold ejector pin 713 and a main mold core 714 which are arranged in the main mold shell 711, the main mold core 714 has a main mold cavity 715 with an opening facing the die 72, and the main mold ejector pin 713 penetrates through the main mold cushion block 712;
the die 72 includes a die housing 721, a die cushion 723 and a die ejector pin 722 arranged in the die housing 721, one end of the die ejector pin 722 is connected to the die cushion 723, and the other end of the die ejector pin 722 penetrates through the die housing 721 to be opposite to the main die cavity 715.
Since the diameter of the straight shank portion 12 of the fastener 1 is not more than 4.7mm, the diameter of the main mold ejector pin 713 opposite to the fastener 1 is also very small, and the overall size thereof is slim. In the processing process, the portion exposed outside the main mold shell 711 is easily broken under the action of strong stamping. A protection tube 724 is sleeved outside the main mold ejector pin 713, so that the main mold ejector pin 713 can be protected. Preferably, a protection tube 724 is sleeved on the main mold ejector 713 of the first mold 2, the second mold 3 and the third mold 4.
Referring to fig. 1 and 4, a push pipe 725 is sleeved outside the punch ejector pins 722 of the third mold 4, the fourth mold 5 and the fifth mold 6, and a plurality of push pins 726 connected to the push pipe 725 are arranged inside the punch 72. The third die 4 is used for forming an inner hole 15 at the second end of the preset straight section 13, and the diameter of the inner hole 15 is 5.2 mm-5.4 mm. Specifically, when the preset straight section 13 is located in the main cavity 715 of the third mold 4, the push tube 725 of the punch 72 is moved into the main cavity 715 by the push pin 726 to abut against the end of the preset straight section 13, so as to ensure that the preset straight section 13 is fixed. With the protrusion 7131 positioning the preset straight section 13 and the push pipe 725 fixed, the second end of the preset straight section 13 is pressed by the die ejector pin 722 to form an inner hole 15. The concentricity of the inner hole 15 and the body 11 is further ensured because the push pipe 725 ensures that the preset straight section 13 is fixed during the processing. During the demolding process, the push tube 725 can continue to press the predetermined straight section 13, so that the die ejector pin 722 can be withdrawn from the inner hole 15 first, and the die ejector pin 722 is prevented from simultaneously taking out the product from the main cavity 715 during the withdrawal process.
Referring to fig. 5, the process of manufacturing the fastener 1 includes:
cutting the wire;
forming a preset straight section 13 by cold heading the wire rod, and forming a groove 14 at a first end of the preset straight end;
sequentially moving the preset straight section 13 into the second die 3, the third die 4, the fourth die 5 and the fifth die 6 by using the groove 14 for cold heading to form a body 11 with an inner hole 15 and a flange and a straight rod part 12 formed at one end of the body 11;
a groove is formed in the straight rod portion 12 by a groove forming plate, and surface treatment is performed to complete processing of the product.
The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (7)
1. The utility model provides a cold-heading module group for fastener, the fastener includes the body, the one end of body is formed with straight pole portion, the diameter of straight pole portion is not more than 4.7mm, its characterized in that, the cold-heading module group includes:
the wire rod forming device comprises a first die, a second die and a third die, wherein the first die is used for forming a wire rod into a preset straight section, and a groove is formed at a first end of the preset straight section;
the second die is used for forming the straight rod part with the groove on the preset straight section;
a third die for forming an inner bore at a second end of the pre-set straight section;
a fourth die for extruding the preset straight section into a preset body;
a fifth die for extruding the preset body into the body with the flange part;
the first mold, the second mold, the third mold, the fourth mold and the fifth mold respectively comprise a main mold thimble abutting against the first end, a convex part is arranged at the end part of the main mold thimble, and the convex part is positioned in a groove matched with the convex part in the fastener machining process.
2. The cold-heading die set for fasteners of claim 1, wherein: the convex part is positioned in the middle of the main die ejector pin, and the center line of the convex part is coincided with the center line of the main die ejector pin.
3. The cold-heading die set for fasteners of claim 1, wherein: the convex part is conical.
4. The cold-heading die set for fasteners of claim 1, wherein: the diameter of the bottom surface of the convex part is 1.1 mm-1.3 mm, and the height of the convex part is 0.5 mm-0.7 mm.
5. The cold-heading die set for fasteners of claim 1, wherein: the first mould, the second mould, the third mould, the fourth mould and the fifth mould respectively comprise a main mould and a stamping mould which are correspondingly arranged;
the main die comprises a main die shell, a main die cushion block, a main die ejector pin and a main die core, wherein the main die cushion block, the main die ejector pin and the main die core are arranged in the main die shell;
the die comprises a die stamping shell, a die stamping cushion block and a die stamping thimble which are arranged in the die stamping shell, one end of the die stamping thimble is connected with the die stamping cushion block, and the other end of the die stamping thimble penetrates out of the die stamping shell to be opposite to the main die cavity.
6. The cold-heading die set for fasteners of claim 5, wherein: and protective pipes are sleeved outside the main mold thimbles of the first mold, the second mold and the third mold.
7. The cold-heading die set for fasteners of claim 5, wherein: and push pipes are sleeved outside the stamping die ejector pins of the third die, the fourth die and the fifth die, and a plurality of push pins connected with the push pipes are arranged in the stamping die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120189075.4U CN214557084U (en) | 2021-01-25 | 2021-01-25 | Cold heading module for fastener |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120189075.4U CN214557084U (en) | 2021-01-25 | 2021-01-25 | Cold heading module for fastener |
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| CN214557084U true CN214557084U (en) | 2021-11-02 |
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| CN202120189075.4U Active CN214557084U (en) | 2021-01-25 | 2021-01-25 | Cold heading module for fastener |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110576143A (en) * | 2019-09-20 | 2019-12-17 | 宾科汽车紧固件（昆山）有限公司 | cold heading device and process for forming screw and screw |
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2021
- 2021-01-25 CN CN202120189075.4U patent/CN214557084U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110576143A (en) * | 2019-09-20 | 2019-12-17 | 宾科汽车紧固件（昆山）有限公司 | cold heading device and process for forming screw and screw |
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