CN213469443U - Cold heading forming die set for special-shaped fastener - Google Patents
Cold heading forming die set for special-shaped fastener Download PDFInfo
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- CN213469443U CN213469443U CN202022076270.4U CN202022076270U CN213469443U CN 213469443 U CN213469443 U CN 213469443U CN 202022076270 U CN202022076270 U CN 202022076270U CN 213469443 U CN213469443 U CN 213469443U
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Abstract
The utility model discloses a cold-heading forming die group of dysmorphism fastener, including with the material embryo cold-heading go out prefabricated hole and the first die group of step prototype, deepen and carry out preformed second die group, to prefabricated hole and to the step fashioned third die group is accomplished to the step to the prefabricated hole. The utility model discloses a three group's mould groups carry out tertiary cold-heading to the material embryo, and the surface after the profiled fastener cold-heading after the shaping is more smooth, has greatly reduced the appearance of defects such as axial plane dimpled grain.
Description
Technical Field
The utility model relates to a cold-heading mould technical field, in particular to cold-heading forming die group of dysmorphism fastener.
Background
Cold heading is a major process for forming fasteners. Cold heading, that is, applying external force to metal at normal temperature to make metal formed in a predetermined die. For some special-shaped fasteners adopting boss and middle hole design, the existing processing mode usually adopts one-step cold heading forming, and the shaft surface of the finished product is easy to have concave line and other defects. How to improve the existing cold heading die to ensure that the quality of a cold heading finished product is better and the surface defects are less becomes a technical problem needing improvement.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a cold-heading forming die group of dysmorphism fastener.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a cold heading forming die set for a special-shaped fastener comprises a first die set for cold heading a blank to form a prefabricated hole and a step initial shape, a second die set for deepening the prefabricated hole and preforming the step, and a third die set for completing forming of the prefabricated hole and the step, wherein the first die set comprises a first cold heading head and a first lower die, the first lower die comprises a first lower die plate, a first lower die holder, a first thimble piece, a first guide cylinder and a first die core matched with the first cold heading head for forming, the first die core is fixedly arranged on the first lower die plate, the first lower die plate is fixedly arranged on the first lower die holder, the first guide cylinder is fixedly arranged on the first lower die holder and in threaded connection with the first lower die holder, the first thimble piece comprises a guide section and a thimble section, and the guide section of the first thimble piece is slidably arranged on the first guide cylinder, the first mold core is provided with a first mold cavity, and the thimble section of the first thimble piece penetrates through the first mold cavity; the second die set comprises a second cold heading and a second lower die, the second lower die comprises a second lower die plate, a second lower die holder, a second thimble piece, a second guide cylinder and a second die core matched with the second cold heading for forming, the second die core is fixedly arranged on the second lower die plate, the second lower die plate is fixedly arranged on the second lower die holder, the second guide cylinder is in threaded connection with the second lower die holder, the second die core is provided with a second die cavity, and the second thimble piece is arranged in the second die cavity in a penetrating manner; the third die set comprises a third cold heading and a third lower die, the third lower die comprises a third lower die plate, a third lower die seat, a third thimble piece, a third guide cylinder and a third die core matched and formed with the third cold heading, the third die core is fixedly installed on the third lower die plate, the third lower die plate is fixedly installed on the third lower die seat, the third guide cylinder is in threaded connection with the third lower die seat, the third die core is provided with a third die cavity, and the third thimble piece is arranged in the third die cavity in a penetrating manner.
Further elaborating, the first cold heading head comprises a first guide cylinder section, a step cold heading column section and a prefabricated hole cold heading boss, the step cold heading column section is arranged in an inner cavity of the first guide cylinder section, and the prefabricated hole cold heading boss is arranged in the inner cavity of the step cold heading column section; the second cold heading head comprises a second guide cylinder section, a step pre-forming cold heading column section and a prefabricated hole deepening cold heading boss, the step pre-forming cold heading column section is arranged in an inner cavity of the second guide cylinder section, and the prefabricated hole deepening cold heading boss is arranged in the inner cavity of the step pre-forming cold heading column section;
the third cold heading head comprises a third guide cylinder section, a step forming cold heading column section and a prefabricated hole forming cold heading boss, the step forming cold heading column section is arranged in an inner cavity of the third guide cylinder section, and the prefabricated hole forming cold heading boss is arranged in the inner cavity of the step forming cold heading column section.
The first die core is provided with a forming end, an intermediate circular table and a positioning end, the intermediate circular table is arranged between the forming end and the positioning end, the first lower die plate is provided with a positioning hole, the positioning end of the first die core is inserted into the positioning hole of the first lower die plate, the forming end of the first die core is inserted into the first guide cylinder section of the first cold heading head during die assembly, and the step cold heading column section of the first cold heading head and the prefabricated hole cold heading boss are used for cold heading of the blank.
Stated further, the second mold core is identical in structure to the first mold core and the third mold core.
Stated further, the first and second pin members are identical in structure.
The beneficial effects of the utility model reside in that: the utility model discloses a three group's mould groups carry out tertiary cold-heading to the material embryo, and the surface after the profiled fastener cold-heading after the shaping is more smooth, has greatly reduced the appearance of defects such as axial plane dimpled grain.
Drawings
Fig. 1 is a sectional view of the present invention.
Fig. 2 is a sectional view of the first mold set in the mold-opened state.
Fig. 3 is a sectional view of the first die set in a clamped state.
Fig. 4 is a sectional view of the second mold set in the mold-opened state.
Fig. 5 is a sectional view of the second mold block in a clamped state.
Fig. 6 is a sectional view of the third module in the open state.
Reference numerals: 10. a first die set; 11. a first cold heading; 111. a first guide cylinder section; 112. step cold heading column section; 113. prefabricating a hole cold heading boss; 12. a first lower die; 121. a first lower template; 122. a first lower die holder; 123. a first thimble member; 1231. a guide section; 1232. a thimble section; 124. a first guide cylinder; 125. a first mold core; 1251. a first mold cavity; 1252. a forming end; 1253. a middle circular table; 1254. a positioning end;
20. a second die set; 21. a second cold heading; 211. a second guide cylinder section; 212. performing a step to form a cold heading column section; 213. prefabricating holes and deepening cold heading bosses; 22. a second lower die; 221. a second lower template; 222. a second lower die holder; 223. a second pin member; 224. a second guide cylinder; 225. a second mold core; 2251. a second type mold cavity; 30. a third die set; 31. a third cold heading; 311. a third guide cylinder section; 312. step forming cold heading column section; 313. prefabricating a hole to form a cold heading boss; 32. a third lower die; 321. a third lower template; 322. a third lower die holder; 323. a third pin member; 324. a third guide cylinder; 325. a third mold core; 3251. a third mold cavity; 40. and (5) material embryo.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 6, a cold heading forming die set for a special-shaped fastener includes a first die set 10 for cold heading a blank 40 to form a preformed hole and a step initial shape, a second die set 20 for deepening the preformed hole and pre-forming the step, and a third die set 30 for completing forming of the preformed hole and the step, where the first die set 10 includes a first cold heading 11 and a first lower die 12, the first lower die 12 includes a first lower die plate 121, a first lower die holder 122, a first thimble element 123, a first guide cylinder 124, and a first die core 125 formed by cooperating with the first cold heading 11, the first die core 125 is fixedly installed on the first lower die plate 121, the first lower die plate 121 is fixedly installed on the first lower die holder 122, the first guide cylinder 124 is in threaded connection with the first lower die holder 122, the first thimble element 123 includes a guide section 1231, The ejector pin section 1232, the guide section 1231 of the first ejector pin 123 is slidably disposed on the first guide cylinder 124, the first mold core 125 is provided with a first mold cavity 1251, and the ejector pin section 1232 of the first ejector pin 123 penetrates through the first mold cavity 1251;
as shown in fig. 1, 4 and 5, the second die set 20 includes a second cold heading 21 and a second lower die 22, the second lower die 22 includes a second lower die plate 221, a second lower die holder 222, a second thimble element 223, a second guide cylinder 224, and a second die core 225 formed by cooperating with the second cold heading 21, the second die core 225 is fixedly mounted on the second lower die plate 221, the second lower die plate 221 is fixedly mounted on the second lower die holder 222, the second guide cylinder 224 is in threaded connection with the second lower die holder 222, the second die core 225 is provided with a second die cavity 2251, and the second thimble element 223 is inserted into the second die cavity 2251; referring to fig. 1 and 6, the third die set 30 includes a third cold heading 31 and a third lower die 32, the third lower die 32 includes a third lower die plate 321, a third lower die holder 322, a third thimble element 323, a third guide cylinder 324, and a third die core 325 formed by matching with the third cold heading 31, the third die core 325 is fixedly mounted on the third lower die plate 321, the third lower die plate 321 is fixedly mounted on the third lower die holder 322, the third guide cylinder 324 is in threaded connection with the third lower die holder 322, the third die core 325 is provided with a third die cavity 3251, and the third thimble element 323 is disposed in the third die cavity 3251.
As shown in fig. 2 and fig. 3, the first cold heading head 11 includes a first guiding cylinder section 111, a step cold heading column section 112, and a preformed hole cold heading boss 113, the step cold heading column section 112 is disposed in the inner cavity of the first guiding cylinder section 111, and the preformed hole cold heading boss 113 is disposed in the inner cavity of the step cold heading column section 112; as shown in fig. 4 and 5, the second cold heading 21 comprises a second guiding cylinder section 211, a step pre-forming cold heading column section 212 and a preformed hole deepening cold heading boss 213, wherein the step pre-forming cold heading column section 212 is arranged in the inner cavity of the second guiding cylinder section 211, and the preformed hole deepening cold heading boss 213 is arranged in the inner cavity of the step pre-forming cold heading column section 212;
as shown in fig. 6, the third cold heading head 31 includes a third guiding cylinder section 311, a step-formed cold heading column section 312, and a preformed hole-formed cold heading boss 313, the step-formed cold heading column section 312 is disposed in the inner cavity of the third guiding cylinder section 311, and the preformed hole-formed cold heading boss 313 is disposed in the inner cavity of the step-formed cold heading column section 312.
Referring to fig. 1 and fig. 2, the first mold core 125 is provided with a forming end 1252, an intermediate circular truncated cone 1253 and a positioning end 1254, the intermediate circular truncated cone 1253 is disposed between the forming end 1252 and the positioning end 1254, the first lower mold plate 121 is provided with a positioning hole, the positioning end 1254 of the first mold core 125 is inserted into the positioning hole of the first lower mold plate 121, the forming end 1252 of the first mold core 125 is inserted into the first guide cylinder section 111 of the first cold heading head 11 during mold closing, and the step cold heading column section 112 and the preformed hole cold heading boss 113 of the first cold heading head 11 perform cold heading on the blank 40. Referring to fig. 3, the step cold heading column of the first cold heading 11 cold-heads a step preliminary shape at the material blank 40, and the preformed hole cold heading boss 113 of the first cold heading 11 cold-heads a preformed hole at the material blank 40.
The second mold core 225 has the same structure as the first mold core 125 and the third mold core 325. The first pin member 123 is identical in structure to the second pin member 223 and the second pin member 223.
When the material blank 40 is used, a shearing device (note: not shown in the drawing) of the cold header punches the material blank 40, a conveying device (note: not shown in the drawing) of the cold header puts the material blank 40 into a cavity formed by the first mold core 125 and the first thimble piece 123 of the first mold group 10, and the first cold header 11 performs primary cold heading on the material blank 40 in the first mold core 125 to cold header the material blank 40 into a prefabricated hole and a step primary shape, which are shown in the drawing 2 and are shown in the drawing 3; then, referring to fig. 4, the workpiece with the first-stage cold heading in the first mold core 125 is transferred to the second mold core 225 of the second mold group 20 by the transfer device of the cold heading machine, referring to fig. 5, the second cold heading 21 performs the second-stage cold heading on the workpiece in the second mold core 225, deepens the preformed hole of the workpiece and performs the step preforming; finally, referring to fig. 6, the workpiece subjected to the secondary cold heading in the second mold core 225 is conveyed to the third mold core 325 of the third mold group 30 by the conveying device of the cold heading machine, and the third cold heading head 31 performs tertiary cold heading on the workpiece in the third mold core 325, so as to complete the forming of the preformed hole and the step of the workpiece.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
The above is not intended to limit the technical scope of the present invention, and any modifications, equivalent changes and modifications to the above embodiments are all within the scope of the technical solution of the present invention.
Claims (5)
1. The utility model provides a cold-heading forming die group of dysmorphism fastener which characterized in that: the first die set comprises a first cold heading die set, a second die set and a third die set, wherein the first die set is used for cold heading a material blank to form a prefabricated hole and a step, the second die set is used for deepening the prefabricated hole and preforming the step, the third die set is used for completing forming of the prefabricated hole and the step, the first die set comprises a first cold heading head and a first lower die, the first lower die comprises a first lower die plate, a first lower die holder, a first thimble piece, a first guide cylinder and a first die core matched and formed with the first cold heading head, the first die core is fixedly arranged on the first lower die plate, the first lower die plate is fixedly arranged on the first lower die holder, the first guide cylinder is fixedly arranged on the first lower die holder and in threaded connection with the first lower die holder, the first thimble piece comprises a guide section and a thimble section, and the guide section of the first thimble piece is arranged on the first guide cylinder in a sliding manner, the first mold core is provided with a first mold cavity, and the thimble section of the first thimble piece penetrates through the first mold cavity; the second die set comprises a second cold heading and a second lower die, the second lower die comprises a second lower die plate, a second lower die holder, a second thimble piece, a second guide cylinder and a second die core matched with the second cold heading for forming, the second die core is fixedly arranged on the second lower die plate, the second lower die plate is fixedly arranged on the second lower die holder, the second guide cylinder is in threaded connection with the second lower die holder, the second die core is provided with a second die cavity, and the second thimble piece is arranged in the second die cavity in a penetrating manner; the third die set comprises a third cold heading and a third lower die, the third lower die comprises a third lower die plate, a third lower die seat, a third thimble piece, a third guide cylinder and a third die core matched and formed with the third cold heading, the third die core is fixedly installed on the third lower die plate, the third lower die plate is fixedly installed on the third lower die seat, the third guide cylinder is in threaded connection with the third lower die seat, the third die core is provided with a third die cavity, and the third thimble piece is arranged in the third die cavity in a penetrating manner.
2. The cold heading forming die set for the special-shaped fastener as claimed in claim 1, wherein: the first cold heading head comprises a first guide cylinder section, a step cold heading column section and a prefabricated hole cold heading boss, the step cold heading column section is arranged in an inner cavity of the first guide cylinder section, and the prefabricated hole cold heading boss is arranged in an inner cavity of the step cold heading column section; the second cold heading head comprises a second guide cylinder section, a step pre-forming cold heading column section and a prefabricated hole deepening cold heading boss, the step pre-forming cold heading column section is arranged in an inner cavity of the second guide cylinder section, and the prefabricated hole deepening cold heading boss is arranged in the inner cavity of the step pre-forming cold heading column section;
the third cold heading head comprises a third guide cylinder section, a step forming cold heading column section and a prefabricated hole forming cold heading boss, the step forming cold heading column section is arranged in an inner cavity of the third guide cylinder section, and the prefabricated hole forming cold heading boss is arranged in the inner cavity of the step forming cold heading column section.
3. The cold heading forming die set for the special-shaped fastener as claimed in claim 2, wherein: the first die core is provided with a forming end, an intermediate round platform and a positioning end, the intermediate round platform is arranged between the forming end and the positioning end, the first lower die plate is provided with a positioning hole, the positioning end of the first die core is inserted into the positioning hole of the first lower die plate, the forming end of the first die core is inserted into the first guide cylinder section of the first cold heading head during die assembly, and the step cold heading column section and the prefabricated hole cold heading boss of the first cold heading head are used for cold heading a blank.
4. The cold heading forming die set for the special-shaped fastener as claimed in claim 1, wherein: the second mold core is completely the same as the first mold core and the third mold core in structure.
5. The cold heading forming die set for the special-shaped fastener as claimed in claim 1, wherein: the first thimble member is identical in structure with the second thimble member and the third thimble member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022076270.4U CN213469443U (en) | 2020-09-21 | 2020-09-21 | Cold heading forming die set for special-shaped fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022076270.4U CN213469443U (en) | 2020-09-21 | 2020-09-21 | Cold heading forming die set for special-shaped fastener |
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| Publication Number | Publication Date |
|---|---|
| CN213469443U true CN213469443U (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022076270.4U Active CN213469443U (en) | 2020-09-21 | 2020-09-21 | Cold heading forming die set for special-shaped fastener |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346145A (en) * | 2022-01-06 | 2022-04-15 | 浙江天元金属制品股份有限公司 | Screw cold-heading processing is with bearing unloader |
-
2020
- 2020-09-21 CN CN202022076270.4U patent/CN213469443U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346145A (en) * | 2022-01-06 | 2022-04-15 | 浙江天元金属制品股份有限公司 | Screw cold-heading processing is with bearing unloader |
| CN114346145B (en) * | 2022-01-06 | 2024-01-02 | 浙江天元金属制品股份有限公司 | Screw cold heading processing is with bearing unloader |
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