CN215845473U - Connecting bolt cold heading die - Google Patents
Connecting bolt cold heading die Download PDFInfo
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- CN215845473U CN215845473U CN202023194812.4U CN202023194812U CN215845473U CN 215845473 U CN215845473 U CN 215845473U CN 202023194812 U CN202023194812 U CN 202023194812U CN 215845473 U CN215845473 U CN 215845473U
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Abstract
The utility model discloses a cold heading die for a connecting bolt, which comprises a punching die and a main die and is characterized in that: the main die comprises a main die shell, a main die core, a lantern ring, a locking cover and a thimble, wherein a mounting hole is arranged in the main die shell, the mounting hole comprises an upper hole, a connecting hole and a screw hole which are coaxially arranged, the lantern ring is arranged in the upper hole, the main die core is arranged in the connecting hole, the top of the locking cover is screwed in the screw hole, and the top of the locking cover is abutted against the bottom surface of the main die core; the top of the main mold core is provided with a product positioning hole, a through hole is arranged below the main mold core, and the top of the thimble penetrates through the locking cover and the through hole to be movably inserted into the product positioning hole; the center of the lantern ring is provided with a yielding hole; the upper hole and the lantern ring are of conical structures with small upper parts and large lower parts. The utility model improves the stability and quality of cold heading, reduces the maintenance rate and improves the assembly efficiency and quality.
Description
Technical Field
The utility model relates to a die, in particular to a cold heading die for a connecting bolt.
Background
The cold heading process is one of the novel processes for machining less and no cutting metal under pressure. 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, and the cold heading die is one of the most important parts in the cold heading process.
In the prior art, a main die of a cold heading die mainly comprises a die shell and a die core arranged in the die shell, however, the die core and the die shell are generally in interference fit when being assembled, the die shell is heated firstly and then the die core is knocked into a mounting hole of the die shell when being assembled, the interference fit installation is completed after the die shell is cooled, or the cold installation is directly performed, and the die core is knocked into the die shell. Meanwhile, when the die core needs to be disassembled, the die core is knocked out, and the die is easily damaged.
Simultaneously, after the cold-heading is accomplished, the card that the cold-heading product was tight when being special is in the mould after, when taking off the material, pull out the mold core in the cold-heading mould easily to lead to the damage of mould, the potential safety hazard appears.
Therefore, the technical problem is solved by the skilled person in the art.
Disclosure of Invention
The utility model aims to provide a connecting bolt cold heading die, which ensures the convenience of die installation, disassembly, maintenance and replacement, ensures the stability and quality of cold heading processing of a product and reduces potential safety hazards.
In order to achieve the purpose, the utility model adopts the technical scheme that: a cold heading die for a connecting bolt comprises a stamping die and a main die, wherein the stamping die is arranged right above the main die, the main die comprises a main die shell, a main die core, a lantern ring, a locking cover and a thimble, a mounting hole is arranged in the main die shell, the lantern ring, the main die core and the locking cover are sequentially mounted in the mounting hole from top to bottom, the mounting hole comprises an upper hole, a connecting hole and a screw hole which are coaxially arranged, the top and the bottom of the connecting hole are respectively communicated with the upper hole and the screw hole, the top of the upper hole is communicated with the top of the main die shell, the bottom of the screw hole is communicated with the bottom of the main die shell, the lantern ring is mounted in the upper hole, the main die core is mounted in the connecting hole, the top of the main die core is abutted against the top surface of the connecting hole, the top of the main die core is contacted with the bottom surface of the lantern ring, and the top of the locking cover is screwed in the screw hole, the top of the locking cover is abutted against the bottom surface of the main mold core; the top of the main mold core is provided with a product positioning hole, a through hole is arranged below the main mold core, the top of the through hole is communicated with the bottom of the product positioning hole, the bottom of the through hole is communicated with the bottom surface of the main mold core, and the top of the thimble penetrates through the locking cover and the through hole to be movably inserted into the product positioning hole;
the center of the lantern ring is provided with a yielding hole, the product positioning hole and the through hole are coaxially arranged, and the diameter of the yielding hole is larger than that of the product positioning hole;
the upper hole and the lantern ring are of conical structures with small upper parts and large lower parts, the top surface of the lantern ring is flush with the top surface of the upper hole, and the bottom surface of the lantern ring is flush with the bottom surface of the upper hole;
the side wall of the main mould shell is provided with a first mounting hole, the outer edge surface of the main mould core is provided with a first screw hole, the first screw hole is arranged right opposite to the first mounting hole, the inner end of the first screw hole is communicated with the connecting hole, the outer edge surface of the middle part of the thimble is provided with a vertical annular groove, the vertical annular groove is arranged right opposite to the first screw hole, a limiting bolt is inserted into the first mounting hole, the inner end of the limiting bolt is screwed into the first screw hole, and the inner end of the limiting bolt is inserted into the vertical annular groove.
In the above technical scheme, an annular protrusion is arranged on the outer edge surface of the bottom of the locking cover, and the top surface of the annular protrusion abuts against the bottom surface of the main formwork.
In the technical scheme, a second connecting hole is formed in the top surface of the locking cover, the bottom of the second connecting hole is communicated with the bottom surface of the locking cover, a limiting column extending downwards is arranged at the bottom of the main mold core, the limiting column is inserted into the second connecting hole, the bottom of the through hole is communicated with the bottom surface of the limiting column, the outer wall of the limiting column supports against the inner wall of the second connecting hole, and the bottom surface of the limiting column is flush with the bottom surface of the locking cover.
In the technical scheme, a second mounting hole is formed in the top of the main mold core, a replaceable product positioning mold is mounted in the second mounting hole, the top surface of the product positioning mold is flush with the top surface of the main mold core, the top of the product positioning hole is communicated with the top surface of the product positioning mold, and the bottom of the product positioning hole is communicated with the bottom surface of the product positioning mold.
In the technical scheme, at least two groups of air holes are uniformly and annularly distributed on the outer edge surface of the main mould shell, the inner parts of the air holes are communicated with the connecting holes, the tops of the air holes are flush with the tops of the connecting holes, at least two groups of arc-shaped grooves are uniformly and annularly distributed on the top surface of the main mould core, the outer sides of the arc-shaped grooves are communicated with the outer edge surface of the main mould core, the inner sides of the arc-shaped grooves are communicated with the second mounting holes, and each group of air holes is opposite to one group of arc-shaped grooves.
In the above technical solution, the diameter of the through hole is smaller than the diameter of the product positioning hole, the diameter of the ejector pin is equal to the diameter of the through hole, the top of the ejector pin is disposed in the through hole in a descending state of the ejector pin, and the top outer edge surface of the limit bolt abuts against the top surface of the vertical annular groove; and under the lifting state of the ejector pin, the top of the ejector pin is arranged in the product positioning hole, and the outer edge surface of the bottom of the limiting bolt is abutted against the bottom surface of the vertical annular groove.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
1. according to the utility model, the lantern ring and the main die core are directly inserted into the main die shell and then locked by the locking cover, so that the lantern ring is in a conical structure, the mounting and locking firmness is good, the lantern ring and the main die core can be prevented from being separated from the main die shell during stripping, the processing stability and quality of a product are effectively ensured, the potential safety hazard is reduced, the assembling, disassembling, maintaining and replacing pin quantity and quality of the die are improved, and the maintenance rate is reduced.
Drawings
Fig. 1 is a schematic structural diagram in a first embodiment of the present invention.
Wherein: 1. punching a die; 2. performing primary molding; 3. a main formwork; 4. a main mold core; 5. a collar; 6. a locking cover; 7. a thimble; 8. an upper hole; 9. connecting holes; 10. a screw hole; 11. positioning holes of the product; 12. a through hole; 13. a hole of abdication; 14. a first mounting hole; 15. a first screw hole; 16. a vertical annular groove; 17. a limit bolt; 18. an annular projection; 19. a second connection hole; 20. a limiting column; 21. a second mounting hole; 22. positioning a product mold; 23. air holes are formed; 24. an arc-shaped groove.
Detailed Description
The utility model is further described with reference to the following figures and examples:
the first embodiment is as follows: referring to fig. 1, a cold heading die for a connecting bolt comprises a die 1 and a main die 2, wherein the die is arranged right above the main die, the main die comprises a main die shell 3, a main die core 4, a sleeve ring 5, a locking cover 6 and a thimble 7, a mounting hole is arranged in the main die shell, the sleeve ring, the main die core and the locking cover are sequentially mounted in the mounting hole from top to bottom, the mounting hole comprises an upper hole 8, a connecting hole 9 and a screw hole 10 which are coaxially arranged, the top and the bottom of the connecting hole are respectively communicated with the upper hole and the screw hole, the top of the upper hole is communicated with the top of the main die shell, the bottom of the screw hole is communicated with the bottom of the main die shell, the sleeve ring is mounted in the upper hole, the main die core is mounted in the connecting hole, the top of the main die core is abutted against the top surface of the connecting hole, and the top of the main die core is contacted with the bottom surface of the sleeve ring, the top of the locking cover is screwed in the screw hole, and the top of the locking cover is abutted against the bottom surface of the main mold core; the top of the main mold core is provided with a product positioning hole 11, a through hole 12 is arranged below the main mold core, the top of the through hole is communicated with the bottom of the product positioning hole, the bottom of the through hole is communicated with the bottom surface of the main mold core, and the top of the thimble penetrates through the locking cover and the through hole to be movably inserted into the product positioning hole;
a yielding hole 13 is formed in the center of the lantern ring, the yielding hole, the product positioning hole and the through hole are coaxially arranged, and the diameter of the yielding hole is larger than that of the product positioning hole;
the upper hole and the lantern ring are of conical structures with small upper parts and large lower parts, the top surface of the lantern ring is flush with the top surface of the upper hole, and the bottom surface of the lantern ring is flush with the bottom surface of the upper hole;
the side wall of the main mould shell is provided with a first mounting hole 14, the outer edge surface of the main mould core is provided with a first screw hole 15, the first screw hole is arranged right opposite to the first mounting hole, the inner end of the first screw hole is communicated with the connecting hole, the outer edge surface of the middle part of the thimble is provided with a vertical annular groove 16, the vertical annular groove is arranged right opposite to the first screw hole, a limit bolt 17 is inserted into the first mounting hole, the inner end of the limit bolt is screwed into the first screw hole, and the inner end of the limit bolt is inserted into the vertical annular groove.
In this embodiment, when the installation, utilize the locking lid tightly to push up master die core in the connecting hole, the top of utilizing the connecting hole carries on spacingly, and then set up the conical lantern ring in the upper hole, the upper hole also is the bell mouth, adopt the bell mouth itself to carry on spacingly to the conical lantern ring, recycle master die core withstands the lantern ring, like this in cold-heading processing, can guarantee cold-heading stability and quality, and simultaneously, when taking off the material, because the lantern ring is the lantern ring of toper structure, like this can be when taking off the material, prevent that the product from driving the lantern ring and master die core and breaking away from main mould shell, guarantee to take off the stability of material. Meanwhile, the arrangement of the limiting bolt and the vertical annular groove enables the vertical bolt to limit the main die core and limit the up-down movement of the ejector pin, so that the ejector pin can ascend and descend to play a limiting role, the ejector pin can strip a product with the shortest stroke, and the cold heading efficiency can be improved,
referring to fig. 1, an annular protrusion 18 is disposed on the outer edge surface of the bottom of the locking cover, and the top surface of the annular protrusion abuts against the bottom surface of the main formwork.
The top surface of the locking cover is provided with a second connecting hole 19, the bottom of the second connecting hole is communicated with the bottom surface of the locking cover, the bottom of the main mold core is provided with a limiting column 20 extending downwards, the limiting column is inserted into the second connecting hole, the bottom of the through hole is communicated with the bottom surface of the limiting column, the outer wall of the limiting column is abutted against the inner wall of the second connecting hole, and the bottom surface of the limiting column is flush with the bottom surface of the locking cover.
Through the setting of spacing post and locking lid, after the master die is installed at cold-heading equipment, can utilize cold-heading equipment to cover locking and withstand like this, prevent that locking lid from shifting, guarantee spacing to master die core position, even the off normal appears in locking lid, also can support spacing the bottom of spacing post spacing, further carry on spacingly to master die core's position, guarantee cold-heading stability and quality.
Referring to fig. 1, a second mounting hole 21 is formed in the top of the main mold core, a replaceable product positioning die 22 is mounted in the second mounting hole, the top surface of the product positioning die is flush with the top surface of the main mold core, the top of the product positioning hole is communicated with the top surface of the product positioning die, and the bottom of the product positioning hole is communicated with the bottom surface of the product positioning die.
Wherein, the diameter of second mounting hole can be less than the diameter in the hole of stepping down, when taking off the material, can carry on spacingly to product location mould like this, prevents that product location mould from breaking away from the second mounting hole, simultaneously, if the product location mould appears damaging, directly dismantle change can, reduce cost.
Referring to fig. 1, at least two groups of air holes 23 are uniformly and annularly distributed on the outer edge surface of the main mould shell, the inner parts of the air holes are communicated with the connecting holes, the top parts of the air holes are flush with the top parts of the connecting holes, at least two groups of arc-shaped grooves 24 are uniformly and annularly distributed on the top surface of the main mould core, the outer sides of the arc-shaped grooves are communicated with the outer edge surface of the main mould core, the inner sides of the arc-shaped grooves are communicated with the second mounting holes, and each group of air holes is opposite to one group of arc-shaped grooves.
In this embodiment, when the product location mould is to product location cold-heading, produce high temperature easily, through the setting of bleeder vent and arc wall, the heat dissipation of being convenient for, increase of service life reduces the maintenance rate.
The diameter of the through hole is smaller than that of the product positioning hole, the diameter of the ejector pin is equal to that of the through hole, the top of the ejector pin is arranged in the through hole in a descending state of the ejector pin, and the outer edge surface of the top of the limiting bolt abuts against the top surface of the vertical annular groove; and under the lifting state of the ejector pin, the top of the ejector pin is arranged in the product positioning hole, and the outer edge surface of the bottom of the limiting bolt is abutted against the bottom surface of the vertical annular groove. The vertical annular groove and the limiting bolt are arranged, so that the up-and-down movement of the ejector pin can be limited, the stroke of the ejector pin is shortened, and the cold heading efficiency can be improved.
Claims (6)
1. The utility model provides a connecting bolt cold heading mould, includes die and master die, the die sets up directly over the master die, its characterized in that: the main die comprises a main die shell, a main die core, a lantern ring, a locking cover and a thimble, wherein the main die shell is internally provided with a mounting hole, the lantern ring, the main mould core and the locking cover are sequentially arranged in the mounting hole from top to bottom, the mounting hole comprises an upper hole, a connecting hole and a screw hole which are coaxially arranged, the top and the bottom of the connecting hole are respectively communicated with the upper hole and the screw hole, the top of the upper hole is communicated with the top of the main shuttering, the bottom of the screw hole is communicated with the bottom of the main shuttering, the lantern ring is arranged in the upper hole, the main mold core is arranged in the connecting hole, the top of the main mold core is propped against the top surface of the connecting hole, the top of the main mold core is in contact with the bottom surface of the lantern ring, the top of the locking cover is screwed in the screw hole, and the top of the locking cover abuts against the bottom surface of the main mold core; the top of the main mold core is provided with a product positioning hole, a through hole is arranged below the main mold core, the top of the through hole is communicated with the bottom of the product positioning hole, the bottom of the through hole is communicated with the bottom surface of the main mold core, and the top of the thimble penetrates through the locking cover and the through hole to be movably inserted into the product positioning hole;
the center of the lantern ring is provided with a yielding hole, the product positioning hole and the through hole are coaxially arranged, and the diameter of the yielding hole is larger than that of the product positioning hole;
the upper hole and the lantern ring are of conical structures with small upper parts and large lower parts, the top surface of the lantern ring is flush with the top surface of the upper hole, and the bottom surface of the lantern ring is flush with the bottom surface of the upper hole;
the side wall of the main mould shell is provided with a first mounting hole, the outer edge surface of the main mould core is provided with a first screw hole, the first screw hole is arranged right opposite to the first mounting hole, the inner end of the first screw hole is communicated with the connecting hole, the outer edge surface of the middle part of the thimble is provided with a vertical annular groove, the vertical annular groove is arranged right opposite to the first screw hole, a limiting bolt is inserted into the first mounting hole, the inner end of the limiting bolt is screwed into the first screw hole, and the inner end of the limiting bolt is inserted into the vertical annular groove.
2. The connecting bolt cold heading die of claim 1, wherein: the bottom outer edge surface of the locking cover is provided with an annular bulge, and the top surface of the annular bulge is abutted against the bottom surface of the main formwork.
3. The connecting bolt cold heading die of claim 1, wherein: the top surface of the locking cover is provided with a second connecting hole, the bottom of the second connecting hole is communicated with the bottom surface of the locking cover, the bottom of the main mold core is provided with a limiting column extending downwards, the limiting column is inserted into the second connecting hole, the bottom of the through hole is communicated with the bottom surface of the limiting column, the outer wall of the limiting column is abutted against the inner wall of the second connecting hole, and the bottom surface of the limiting column is flush with the bottom surface of the locking cover.
4. The connecting bolt cold heading die of claim 1, wherein: the top of the main mold core is provided with a second mounting hole, a replaceable product positioning mold is mounted in the second mounting hole, the top surface of the product positioning mold is flush with the top surface of the main mold core, the top of the product positioning hole is communicated with the top surface of the product positioning mold, and the bottom of the product positioning hole is communicated with the bottom surface of the product positioning mold.
5. The connecting bolt cold heading die of claim 4, wherein: at least two groups of air holes are uniformly and annularly distributed on the outer edge surface of the main mould shell, the insides of the air holes are communicated with the connecting holes, the tops of the air holes are flush with the tops of the connecting holes, at least two groups of arc-shaped grooves are uniformly and annularly distributed on the top surface of the main mould core, the outer sides of the arc-shaped grooves are communicated with the outer edge surface of the main mould core, the inner sides of the arc-shaped grooves are communicated with the second mounting holes, and each group of air holes is opposite to one group of arc-shaped grooves.
6. The connecting bolt cold heading die of claim 4, wherein: the diameter of the through hole is smaller than that of the product positioning hole, the diameter of the ejector pin is equal to that of the through hole, the top of the ejector pin is arranged in the through hole in a descending state of the ejector pin, and the outer edge surface of the top of the limiting bolt abuts against the top surface of the vertical annular groove; and under the lifting state of the ejector pin, the top of the ejector pin is arranged in the product positioning hole, and the outer edge surface of the bottom of the limiting bolt is abutted against the bottom surface of the vertical annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023194812.4U CN215845473U (en) | 2020-12-25 | 2020-12-25 | Connecting bolt cold heading die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023194812.4U CN215845473U (en) | 2020-12-25 | 2020-12-25 | Connecting bolt cold heading die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215845473U true CN215845473U (en) | 2022-02-18 |
Family
ID=80237199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023194812.4U Active CN215845473U (en) | 2020-12-25 | 2020-12-25 | Connecting bolt cold heading die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215845473U (en) |
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2020
- 2020-12-25 CN CN202023194812.4U patent/CN215845473U/en active Active
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