CN111390083A - Automobile nut forming process - Google Patents
Automobile nut forming process Download PDFInfo
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- CN111390083A CN111390083A CN202010206454.XA CN202010206454A CN111390083A CN 111390083 A CN111390083 A CN 111390083A CN 202010206454 A CN202010206454 A CN 202010206454A CN 111390083 A CN111390083 A CN 111390083A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
-
- 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
- B21K1/64—Making machine elements nuts
- B21K1/68—Making machine elements nuts from round or profiled bars
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention discloses an automobile nut forming process, which comprises the following steps: material shearing: feeding a metal round bar with the diameter of 34mm into a cold header and cutting the metal round bar into blanks with the length of 34 mm; a mould: according to a forming process of a corresponding structure of an automobile nut, five forming dies and five stamping dies are prepared and arranged in sequence and correspond to the five processes in sequence; step one; step two; step three; step four; step five; and finishing cold heading. The automobile nut forming process adopts a cold heading forming mode to perform nut forming processing, and the stress condition of a die in the forming process is shared by redesigning the forming process, so that the service life of the die is improved; the position of the inner hole material breakage is adjusted, and the problem of steps possibly occurring in the inner thread after tapping is solved.
Description
Technical Field
The invention relates to a nut forming process, in particular to an automobile nut forming process, and belongs to the technical field of nuts.
Background
The nut is also called a nut, and is a fixing tool, the center of which is provided with a hole, the inner side of the hole is provided with threads, the nut is often shared with screws with the same size to fix the relevant joint part, if the nut is loosened by environmental factors such as vibration and the like, the relevant part can be further reinforced by using tools such as glue or pins, and the nut is hexagonal in shape and square in shape.
The main production technology of the hub nut in the current stage in the market is that the hub nut is produced in a machining mode after being subjected to the red upsetting, the workpiece is required to be heated and then upset under the condition of no protection by the red upsetting, so decarburization is easy to occur in the production process, the overall performance of the product is finally influenced, and part of the products are processed by using a cold upsetting mode. Therefore, the automobile nut forming process is provided for solving the problems.
Disclosure of Invention
The invention aims to solve the problems and provide a process for forming an automobile nut.
The invention achieves the aim through the following technical scheme, and provides an automobile nut forming process, which comprises the following steps:
(1) material shearing: feeding a metal round bar with the diameter of 34mm into a cold header and cutting the metal round bar into blanks with the length of 34 mm;
(2) a mould: according to a forming process of a corresponding structure of an automobile nut, five forming dies and five stamping dies are prepared and arranged in sequence and correspond to the five processes in sequence;
(3) the first process step: performing cold heading on the blank through a forming die I and a stamping die, forming a chamfer at the bottom end of the blank in the step (1), wherein the diameter of the formed end surface at the top end is 35.8mm, a circular groove with the inner diameter of 21mm is formed in the middle of the blank, an annular inclined plane with the outer diameter of 26.9 is formed at the notch of the circular groove, and a product formed in the step I is transferred into a forming die II through a mechanical clamping arm;
(4) and a second step: forming chamfers at the upper end and the lower end of the product in the first step by cold heading of a second forming die and a second stamping die, wherein the diameter of the upper forming end face is 35.9mm, the middle position of the upper end face is a forming circular groove with the diameter of 21mm, the diameter of the lower forming end face is 25.5mm, the diameter of the circular groove at the middle position of the lower end face is 21mm, and the product formed in the second step is transferred into a third forming die by a mechanical clamping arm;
(5) and a third step of: forming the middle part of the product in the second procedure into a column hole with the inner aperture of 21mm by cold heading of a forming die III and a stamping die III, forming the middle part of the upper end face into a round convex block structure, and forming the lower end face into the diameter of 36mm, wherein the product formed in the third procedure is transferred into a forming die IV by a mechanical clamping arm;
(6) step four: forming the product in the third step into a hexagonal prism by cold heading of a forming die IV and a stamping die IV, wherein the forming width of the maximum section is 36.2mm, the inner diameter of a column hole in the third step is 21mm, and the product formed in the fourth step is transferred into a forming die V by a mechanical clamping arm;
(7) and a fifth step: forming the maximum section of the product in the third step into 38mm by cold heading of a forming die V and a stamping die V;
(8) and (3) finishing cold heading: and reserving a station for improvement treatment.
Preferably, the first forming die in the step (3) and the second forming die in the step (4) are formed by splicing an upper die and a lower die, and the lower end of the product formed by the second forming die in the step (4) is required to be the shorter the chamfer is, the better the chamfer is.
Preferably, the lower end of the product forming end surface with the diameter of 25.5mm in the step (4) is of a convex ring block structure, and the depth of the convex ring block is required to be as much as possible.
Preferably, in the step (3), an annular surface is formed between the circular bump structure in the middle of the upper end face of the product and the edge of the upper end face, and the middle position of the end face of the circular bump structure is a column hole forming part with the inner diameter of 21 mm.
Preferably, the formed products in the steps (3), (4) and (5) are all cylindrical, the diameter of the formed products in the steps (3), (4) and (5) is 21mm as the aperture size of the final product, and the diameter of the mandril at the lower end of the first stamping die and the diameter of the mandril at the lower end of the second stamping die in the steps (3) and (4) are both 21 mm.
Preferably, the third middle position of the forming die, the lower end part of the fourth middle position of the forming die and the fifth middle position of the forming die in the steps (5), (6) and (7) are respectively in a hole structure, a hexagonal hole structure and a hexagonal hole structure, and the formed products in the steps (6) and (7) are all in a hexagonal prism shape.
Preferably, a bump structure is formed around the upper end of the formed product in the step (7), and the thickness of the bump structure is 2.92 mm.
Preferably, the cold heading requirement of the hole structure with the diameter of 21mm in the steps (6) and (7) is to perform pre-punching to protect the inner hole bundle hexagon and eject the hole structure by using PKO.
Preferably, the maximum section forming width of the product in the step (7) is 38mm, and the section is formed by cutting a regular hexagon diagonal line.
Preferably, the corresponding size of the product in the step (7) cannot be finished as the size specification of the final product through the step (8).
The invention has the beneficial effects that:
the automobile nut forming process adopts a cold heading forming mode to perform nut forming processing, and the stress condition of a die in the forming process is shared by redesigning the forming process, so that the service life of the die is improved; the position of the inner hole material breakage is adjusted, and the problem of steps possibly occurring in the inner thread after tapping is solved.
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, and 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 inventive exercise.
FIG. 1 is a structural map of a forming die and a stamping die according to the present invention;
FIG. 2 is a schematic structural distribution diagram of a first forming die and a first stamping die according to the present invention;
FIG. 3 is a schematic structural distribution diagram of a second forming die and a second stamping die according to the present invention;
FIG. 4 is a schematic structural distribution diagram of a third forming die and a third stamping die of the present invention;
FIG. 5 is a schematic structural distribution diagram of a forming die IV and a stamping die IV according to the present invention;
FIG. 6 is a schematic structural distribution diagram of a forming die V and a stamping die V in the invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Please refer to fig. 1-6:
the first embodiment is as follows:
the automobile nut forming process comprises the following steps:
(1) material shearing: feeding a metal round bar with the diameter of 34mm into a cold header and cutting the metal round bar into blanks with the length of 34 mm;
(2) a mould: according to a forming process of a corresponding structure of an automobile nut, five forming dies and five stamping dies are prepared and arranged in sequence and correspond to the five processes in sequence;
(3) the first process step: performing cold heading on the blank through a forming die I and a stamping die, forming a chamfer at the bottom end of the blank in the step (1), wherein the diameter of the formed end surface at the top end is 35.8mm, a circular groove with the inner diameter of 21mm is formed in the middle of the blank, an annular inclined plane with the outer diameter of 26.9 is formed at the notch of the circular groove, and a product formed in the step I is transferred into a forming die II through a mechanical clamping arm;
(4) and a second step: forming chamfers at the upper end and the lower end of the product in the first step by cold heading of a second forming die and a second stamping die, wherein the diameter of the upper forming end face is 35.9mm, the middle position of the upper end face is a forming circular groove with the diameter of 21mm, the diameter of the lower forming end face is 25.5mm, the diameter of the circular groove at the middle position of the lower end face is 21mm, and the product formed in the second step is transferred into a third forming die by a mechanical clamping arm;
(5) and a third step of: forming the middle part of the product in the second procedure into a column hole with the inner aperture of 21mm by cold heading of a forming die III and a stamping die III, forming the middle part of the upper end face into a round convex block structure, and forming the lower end face into the diameter of 36mm, wherein the product formed in the third procedure is transferred into a forming die IV by a mechanical clamping arm;
(6) step four: forming the product in the third step into a hexagonal prism by cold heading of a forming die IV and a stamping die IV, wherein the forming width of the maximum section is 36.2mm, the inner diameter of a column hole in the third step is 21mm, and the product formed in the fourth step is transferred into a forming die V by a mechanical clamping arm;
(7) and a fifth step: forming the maximum section of the product in the third step into 38mm by cold heading of a forming die V and a stamping die V;
(8) and (3) finishing cold heading: and reserving a station for improvement treatment.
Further, the forming die I in the step (3) and the forming die II in the step (4) are formed by splicing an upper die and a lower die, and the lower end of a formed product of the forming die II in the step (4) is required to be the shorter the chamfer is, the better the chamfer is.
Furthermore, the lower end of the product forming end surface with the diameter of 25.5mm in the step (4) is provided with a convex ring block structure, and the depth of the convex ring block is required to be the depth of the product forming end surface.
And (3) forming an annular surface between the round bump structure in the middle of the upper end face of the product in the step (3) and the edge of the upper end face, wherein the middle position of the end face of the round bump structure is a column hole forming part with the inner diameter of 21 mm.
Further, the formed products in the steps (3), (4) and (5) are all cylindrical, the diameter of the formed products in the steps (3), (4) and (5) is 21mm, the diameter of the ejector rod at the lower end of the first stamping die and the diameter of the ejector rod at the lower end of the second stamping die in the steps (3) and (4) are both 21 mm.
Further, the middle positions of the third forming die, the lower end part of the fourth forming die and the middle position of the fifth forming die in the steps (5), (6) and (7) are respectively of a hole structure, a hexagonal hole structure and a hexagonal hole structure, and the formed products in the steps (6) and (7) are all in the shape of a hexagonal prism.
Furthermore, a bump structure is formed around the upper end of the formed product in the step (7), and the thickness of the bump structure is 2.92 mm.
Further, the cold heading requirement of the hole structure with the diameter of 21mm in the steps (6) and (7) is to pre-punch the inner hole bundle hexagon and eject the hole structure by using PKO.
Further, the maximum section forming width of the product in the step (7) is 38mm, and the section is formed by cutting a regular hexagon diagonal line.
Further, the corresponding size of the product in the step (7) cannot be finished as the size specification of the final product through the step (8).
The automobile nut forming process adopts a cold heading forming mode to perform nut forming processing, and the stress condition of a die in the forming process is shared by redesigning the forming process.
Example two:
the automobile nut forming process comprises the following steps:
(1) material shearing: feeding a metal round bar with the diameter of 34mm into a cold header and cutting the metal round bar into blanks with the length of 34 mm;
(2) a mould: according to a forming process of a corresponding structure of an automobile nut, five forming dies and five stamping dies are prepared and arranged in sequence and correspond to the five processes in sequence;
(3) the first process step: performing cold heading on the blank through a forming die I and a stamping die, forming a chamfer at the bottom end of the blank in the step (1), wherein the diameter of the formed end surface at the top end is 35.8mm, a circular groove with the inner diameter of 21mm is formed in the middle of the blank, an annular inclined plane with the outer diameter of 26.9 is formed at the notch of the circular groove, and a product formed in the step I is transferred into a forming die II through a mechanical clamping arm;
(4) and a second step: forming chamfers at the upper end and the lower end of the product in the first step by cold heading of a second forming die and a second stamping die, wherein the diameter of the upper forming end face is 35.9mm, the middle position of the upper end face is a forming circular groove with the diameter of 21mm, the diameter of the lower forming end face is 25.5mm, the diameter of the circular groove at the middle position of the lower end face is 21mm, and the product formed in the second step is transferred into a third forming die by a mechanical clamping arm;
(5) and a third step of: forming the middle part of the product in the second procedure into a column hole with the inner aperture of 21mm by cold heading of a forming die III and a stamping die III, forming the middle part of the upper end face into a round convex block structure, and forming the lower end face into the diameter of 36mm, wherein the product formed in the third procedure is transferred into a forming die IV by a mechanical clamping arm;
(6) step four: forming the product in the third step into a hexagonal prism by cold heading of a forming die IV and a stamping die IV, wherein the forming width of the maximum section is 36.2mm, the inner diameter of a column hole in the third step is 21mm, and the product formed in the fourth step is transferred into a forming die V by a mechanical clamping arm;
(7) and a fifth step: forming the maximum section of the product in the third step into 38mm by cold heading of a forming die V and a stamping die V;
(8) and (3) finishing cold heading: and reserving a station for improvement treatment.
Further, the forming die I in the step (3) and the forming die II in the step (4) are formed by splicing an upper die and a lower die, and the lower end of a formed product of the forming die II in the step (4) is required to be the shorter the chamfer is, the better the chamfer is.
Furthermore, the lower end of the product forming end surface with the diameter of 25.5mm in the step (4) is provided with a convex ring block structure, and the depth of the convex ring block is required to be the depth of the product forming end surface.
And (3) forming an annular surface between the round bump structure in the middle of the upper end face of the product in the step (3) and the edge of the upper end face, wherein the middle position of the end face of the round bump structure is a column hole forming part with the inner diameter of 21 mm.
Further, the formed products in the steps (3), (4) and (5) are all cylindrical, the diameter of the formed products in the steps (3), (4) and (5) is 21mm, the diameter of the ejector rod at the lower end of the first stamping die and the diameter of the ejector rod at the lower end of the second stamping die in the steps (3) and (4) are both 21 mm.
Further, the middle positions of the third forming die, the lower end part of the fourth forming die and the middle position of the fifth forming die in the steps (5), (6) and (7) are respectively of a hole structure, a hexagonal hole structure and a hexagonal hole structure, and the formed products in the steps (6) and (7) are all in the shape of a hexagonal prism.
Furthermore, a bump structure is formed around the upper end of the formed product in the step (7), and the thickness of the bump structure is 2.92 mm.
Further, the cold heading requirement of the hole structure with the diameter of 21mm in the steps (6) and (7) is to pre-punch the inner hole bundle hexagon and eject the hole structure by using PKO.
Further, the maximum section forming width of the product in the step (7) is 38mm, and the section is formed by cutting a regular hexagon diagonal line.
Further, the corresponding size of the product in the step (7) cannot be finished as the size specification of the final product through the step (8).
The automobile nut forming process adjusts the position of the broken material of the inner hole, and solves the problem of steps possibly occurring in the inner thread after tapping.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The automobile nut forming process is characterized by comprising the following steps: the automobile nut forming process comprises the following steps:
(1) material shearing: feeding a metal round bar with the diameter of 34mm into a cold header and cutting the metal round bar into blanks with the length of 34 mm;
(2) a mould: according to a forming process of a corresponding structure of an automobile nut, five forming dies and five stamping dies are prepared and arranged in sequence and correspond to the five processes in sequence;
(3) the first process step: performing cold heading on the blank through a forming die I and a stamping die, forming a chamfer at the bottom end of the blank in the step (1), wherein the diameter of the formed end surface at the top end is 35.8mm, a circular groove with the inner diameter of 21mm is formed in the middle of the blank, an annular inclined plane with the outer diameter of 26.9 is formed at the notch of the circular groove, and a product formed in the step I is transferred into a forming die II through a mechanical clamping arm;
(4) and a second step: forming chamfers at the upper end and the lower end of the product in the first step by cold heading of a second forming die and a second stamping die, wherein the diameter of the upper forming end face is 35.9mm, the middle position of the upper end face is a forming circular groove with the diameter of 21mm, the diameter of the lower forming end face is 25.5mm, the diameter of the circular groove at the middle position of the lower end face is 21mm, and the product formed in the second step is transferred into a third forming die by a mechanical clamping arm;
(5) and a third step of: forming the middle part of the product in the second procedure into a column hole with the inner aperture of 21mm by cold heading of a forming die III and a stamping die III, forming the middle part of the upper end face into a round convex block structure, and forming the lower end face into the diameter of 36mm, wherein the product formed in the third procedure is transferred into a forming die IV by a mechanical clamping arm;
(6) step four: forming the product in the third step into a hexagonal prism by cold heading of a forming die IV and a stamping die IV, wherein the forming width of the maximum section is 36.2mm, the inner diameter of a column hole in the third step is 21mm, and the product formed in the fourth step is transferred into a forming die V by a mechanical clamping arm;
(7) and a fifth step: forming the maximum section of the product in the third step into 38mm by cold heading of a forming die V and a stamping die V;
(8) and (3) finishing cold heading: and reserving a station for improvement treatment.
2. The automotive nut molding process according to claim 1, characterized in that: and (3) splicing the upper die and the lower die to form the first forming die in the step (3) and the second forming die in the step (4), wherein the lower end of a product formed by the second forming die in the step (4) is required to be the shorter the chamfer is, the better the chamfer is.
3. The automotive nut molding process according to claim 1, characterized in that: and (4) in the step (4), the lower end of the product with the diameter of 25.5mm is of a convex ring block structure, and the depth of the convex ring block is required to be as much as the depth of the product.
4. The automotive nut molding process according to claim 1, characterized in that: and (4) forming an annular surface between the round bump structure in the middle of the upper end face of the product in the step (3) and the edge of the upper end face, wherein the middle position of the end face of the round bump structure is a column hole forming part with the inner diameter of 21 mm.
5. The automotive nut molding process according to claim 1, characterized in that: the formed products in the steps (3), (4) and (5) are all cylindrical, the diameter of 21mm in the steps (3), (4) and (5) is used as the aperture size of the final product, and the diameter of the ejector rod at the lower end of the first stamping die and the diameter of the ejector rod at the lower end of the second stamping die in the steps (3) and (4) are both 21 mm.
6. The automotive nut molding process according to claim 1, characterized in that: and (3) the middle positions of the third forming die, the lower end part of the fourth forming die and the middle position of the fifth forming die in the steps (5), (6) and (7) are respectively of a hole structure, a hexagonal hole structure and a hexagonal hole structure, and the formed products in the steps (6) and (7) are all in the shape of a hexagonal prism.
7. The automotive nut molding process according to claim 1, characterized in that: and (4) forming a bump structure around the upper end of the formed product in the step (7), wherein the thickness of the bump structure is 2.92 mm.
8. The automotive nut molding process according to claim 1, characterized in that: and (4) in the steps (6) and (7), the cold heading requirement on the hole structure with the diameter of 21mm is to perform pre-punching to protect the inner hole bundle hexagon and eject the hole structure by using PKO.
9. The automotive nut molding process according to claim 1, characterized in that: the maximum section forming width of the product in the step (7) is 38mm, and the section is formed by cutting a regular hexagon diagonal line.
10. The automotive nut molding process according to claim 1, characterized in that: the corresponding size of the product in the step (7) cannot be used as the size specification of the final product to be finished through the step (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010206454.XA CN111390083A (en) | 2020-03-23 | 2020-03-23 | Automobile nut forming process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010206454.XA CN111390083A (en) | 2020-03-23 | 2020-03-23 | Automobile nut forming process |
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|---|---|
| CN111390083A true CN111390083A (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010206454.XA Pending CN111390083A (en) | 2020-03-23 | 2020-03-23 | Automobile nut forming process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002307127A (en) * | 2001-04-16 | 2002-10-22 | Ogawa Kogyo Kk | Cylindrical formed body manufacturing method, and cylindrical formed body manufactured by the manufacturing method |
| KR20100067863A (en) * | 2008-12-12 | 2010-06-22 | 임영우 | A formation way of a pipe connection dragon nut |
| CN205629267U (en) * | 2016-05-23 | 2016-10-12 | 鹏驰五金制品（昆山）有限公司 | Mould of processing automobile wheel hub nut |
| CN209206360U (en) * | 2018-12-13 | 2019-08-06 | 昆山麦克司博精密机械有限公司 | A kind of cold upsetting die of car of automobile nut |
| CN110180970A (en) * | 2019-05-21 | 2019-08-30 | 宾科汽车紧固件（昆山）有限公司 | The shaping mechanism and its forming method of self-clinching nut |
| CN209318698U (en) * | 2018-10-26 | 2019-08-30 | 宾科汽车紧固件（昆山）有限公司 | For spending the molding cold-heading device of tooth flange nut |
| CN110586845A (en) * | 2019-08-29 | 2019-12-20 | 宁波安拓实业有限公司 | Manufacturing method of large square nut for automobile chassis connecting system |
-
2020
- 2020-03-23 CN CN202010206454.XA patent/CN111390083A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002307127A (en) * | 2001-04-16 | 2002-10-22 | Ogawa Kogyo Kk | Cylindrical formed body manufacturing method, and cylindrical formed body manufactured by the manufacturing method |
| KR20100067863A (en) * | 2008-12-12 | 2010-06-22 | 임영우 | A formation way of a pipe connection dragon nut |
| CN205629267U (en) * | 2016-05-23 | 2016-10-12 | 鹏驰五金制品（昆山）有限公司 | Mould of processing automobile wheel hub nut |
| CN209318698U (en) * | 2018-10-26 | 2019-08-30 | 宾科汽车紧固件（昆山）有限公司 | For spending the molding cold-heading device of tooth flange nut |
| CN209206360U (en) * | 2018-12-13 | 2019-08-06 | 昆山麦克司博精密机械有限公司 | A kind of cold upsetting die of car of automobile nut |
| CN110180970A (en) * | 2019-05-21 | 2019-08-30 | 宾科汽车紧固件（昆山）有限公司 | The shaping mechanism and its forming method of self-clinching nut |
| CN110586845A (en) * | 2019-08-29 | 2019-12-20 | 宁波安拓实业有限公司 | Manufacturing method of large square nut for automobile chassis connecting system |
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Application publication date: 20200710 |