CN110732618A - Die for upsetting hexagon flange bolt - Google Patents
Die for upsetting hexagon flange bolt Download PDFInfo
- Publication number
- CN110732618A CN110732618A CN201911210870.0A CN201911210870A CN110732618A CN 110732618 A CN110732618 A CN 110732618A CN 201911210870 A CN201911210870 A CN 201911210870A CN 110732618 A CN110732618 A CN 110732618A
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- China
- Prior art keywords
- die
- die cavity
- split
- cavity
- stamping
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
Abstract
The invention discloses a die for upsetting a hexagonal flange bolt, which is characterized in that: the die comprises an upper die cavity, a middle die cavity and a lower die cavity which are coaxially arranged, wherein the upper die cavity is arranged in a stamping die head, the stamping die head is movably arranged up and down, the lower end surface of the stamping die head is connected with a die sleeve, the lower die cavity is arranged in a bottom die base, the bottom die base is fixedly arranged, the middle die cavity is arranged in an inner hole which is enclosed by a plurality of split dies, the split dies do radial sliding motion at the top of the bottom die base, the outward sliding motion of the split dies is pushed by a spring, the excircle of the split dies is provided with a cylindrical surface, the top of the cylindrical surface is continuously connected with a conical surface, and the inner hole of the die sleeve is; when the stamping die head moves downwards during cold heading, the die closing sleeve firstly makes each split die close by contacting the conical surface through the conical hole, and then makes each split die lock and close the die through the column hole. The invention is used for cold heading forming of the hexagonal flange bolt, so that the formed hexagonal flange bolt can save materials, and the die has simple structure and long service life.
Description
Technical Field
The invention relates to cold heading dies, in particular to dies for heading hexagonal flange bolts.
Background
The existing hexagonal flange bolt comprises a head, a shaft part and a threaded part, wherein the shaft part is connected with the head, the outer circle of the shaft part has the same size, and the outer diameter of the threaded part is smaller than that of the shaft part. In order to save the material consumption of the hexagon flange bolt, it is preferable to reduce the size of the outer circle of the upper section connecting the shaft part and the head part. At present, the cold heading manufacturing of the material-saving hexagon flange bolt is realized, the die structure is complex, and the service life is short.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide types of upsetting hexagonal flange bolt dies for cold heading forming of hexagonal flange bolts, which can save materials for the formed hexagonal flange bolts, have simple structures and long service lives.
The invention is implemented by the following technical scheme:
mould of system hexagonal flange bolt of upsetting, its characterized in that: the die comprises an upper die cavity, a middle die cavity and a lower die cavity which are coaxially arranged, wherein the upper die cavity is arranged in a stamping die head, the stamping die head is movably arranged up and down, the lower end surface of the stamping die head is connected with a die sleeve, the lower die cavity is arranged in a bottom die base, the bottom die base is fixedly arranged, the middle die cavity is arranged in an inner hole which is enclosed by a plurality of split dies, the split dies do radial sliding motion at the top of the bottom die base, the outward sliding motion of the split dies is pushed by a spring, the excircle of the split dies is provided with a cylindrical surface, the top of the cylindrical surface is continuously connected with a conical surface, and the inner hole of the die sleeve is; when the stamping die head moves downwards during cold heading, the die closing sleeve firstly makes each split die close by contacting the conical surface through the conical hole, and then makes each split die lock and close the die through the column hole.
The upsetting hexagonal flange bolt die has the advantages that the structure is simple, the innovation key lies in the design of the continuous cylindrical surface and the conical surface of the excircle of the split dies and the continuous cylindrical hole and the conical hole of the inner hole of the die closing sleeve, the die closing sleeve pushes the split dies to be completely closed and folded and starts to perform die locking action when the stamping die head does not descend to enable a blank to deform in the middle die cavity, the phenomena that the split dies cannot be completely closed and folded and the die closing force is overlarge due to the advanced deformation of the blank are prevented, and the service life of the die is prolonged. The specific cold heading process of the hexagonal flange bolt is as follows: when the blank reaches the lower part of the stamping die head, the stamping die head moves downwards to push the lower end of the blank into the middle and lower die cavities, the stamping die head continues to move downwards, the die closing sleeve firstly contacts the conical surface through the conical hole to close each split die, at the moment, because the stamping die head is far away from the lower limit position, the blank does not start to deform or deforms very little in the middle and lower die cavities, therefore, the split molds can be completely closed and folded through the taper holes, the mold closing force is small, then the column holes lock and close the split molds, then the stamping die head continues to move downwards, the blank begins to deform in the upper, middle and lower die cavities until the hexagonal flange bolt is formed by cold upsetting, the stamping die head returns after the hexagonal flange bolt is formed by cold upsetting, the spring enables each split die to be opened, meanwhile, the rear through ejector rod of the cold header acts to push the hexagonal flange bolt upwards, and the cold heading forming manufacturing of the hexagonal flange bolt is completed.
Preferably, the middle die cavity is enclosed by three or four split dies, and the bottom of the middle die cavity is provided with a guide chamfer. In the above-mentioned design, the direction chamfer can make and can be opened more fast between each lamella mould, overcomes the not enough of the slow mold opening speed that spring trouble or spring force are not enough to bring, guarantees cold-heading work efficiency's improvement.
Drawings
The invention has the following drawings:
figure 1 is a schematic view of the structure of the present invention (before the ram die is moved downward),
FIG. 2 is a schematic view showing the structure of the present invention (when the punching die reaches the lower limit position)
FIG. 3 is a view showing the outer shape of a hexagonal flanged bolt formed by cold heading according to the present invention.
Detailed Description
As shown in figures 1 and 2, the die for upsetting the hexagon flange bolt of the invention comprises an upper die cavity 2, a middle die cavity 4 and a lower die cavity 7 which are coaxially arranged, wherein the upper die cavity 2 is arranged in a stamping die head 1, the stamping die head 1 is movably arranged up and down, a lower end surface of the stamping die head 1 is connected with a die closing sleeve 3, the lower die cavity 7 is arranged in a base die 8, the base die 8 is fixedly arranged, the middle die cavity 4 is arranged in an inner hole surrounded by three same-shaped split dies 5, the bottom of the middle die cavity 4 is provided with a guide chamfer 6, the split dies 5 do radial sliding motion on the top of the base die 8, the outward sliding motion of the split dies 5 is pushed by a spring 9, the outer circle of the split dies 5 is provided with a cylindrical surface 52, the top of the cylindrical surface 52 is continuously connected with a conical surface 51, the inner hole of the die closing sleeve 3 is provided with a cylindrical hole 31 matched with the cylindrical surface 52 and a conical hole 32 matched with the conical surface 51, and the die closing sleeve 3 is locked by the cold-upsetting bolt of the invention as shown in figure 3.
Claims (2)
1. Mould of system hexagonal flange bolt of upsetting, its characterized in that: the die comprises an upper die cavity, a middle die cavity and a lower die cavity which are coaxially arranged, wherein the upper die cavity is arranged in a stamping die head, the stamping die head is movably arranged up and down, the lower end surface of the stamping die head is connected with a die sleeve, the lower die cavity is arranged in a bottom die base, the bottom die base is fixedly arranged, the middle die cavity is arranged in an inner hole which is enclosed by a plurality of split dies, the split dies do radial sliding motion at the top of the bottom die base, the outward sliding motion of the split dies is pushed by a spring, the excircle of the split dies is provided with a cylindrical surface, the top of the cylindrical surface is continuously connected with a conical surface, and the inner hole of the die sleeve is; when the stamping die head moves downwards during cold heading, the die closing sleeve firstly makes each split die close by contacting the conical surface through the conical hole, and then makes each split die lock and close the die through the column hole.
2. The die for upsetting a hexagonal flange bolt as recited in claim 1, wherein: the middle die cavity is enclosed by three or four split dies, and the bottom of the middle die cavity is provided with a guide chamfer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911210870.0A CN110732618A (en) | 2019-12-02 | 2019-12-02 | Die for upsetting hexagon flange bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911210870.0A CN110732618A (en) | 2019-12-02 | 2019-12-02 | Die for upsetting hexagon flange bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110732618A true CN110732618A (en) | 2020-01-31 |
Family
ID=69274213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911210870.0A Pending CN110732618A (en) | 2019-12-02 | 2019-12-02 | Die for upsetting hexagon flange bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110732618A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605288A (en) * | 2020-12-01 | 2021-04-06 | 湖北超卓航空科技股份有限公司 | T-shaped bolt stamping die |
| CN113976793A (en) * | 2021-09-28 | 2022-01-28 | 浙江科腾精工机械股份有限公司 | Hot extrusion molding equipment for square-head bolt |
| CN114101571A (en) * | 2021-12-01 | 2022-03-01 | 浙江汇丰汽车零部件股份有限公司 | Slotted bolt and processing method and die thereof |
-
2019
- 2019-12-02 CN CN201911210870.0A patent/CN110732618A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605288A (en) * | 2020-12-01 | 2021-04-06 | 湖北超卓航空科技股份有限公司 | T-shaped bolt stamping die |
| CN113976793A (en) * | 2021-09-28 | 2022-01-28 | 浙江科腾精工机械股份有限公司 | Hot extrusion molding equipment for square-head bolt |
| CN113976793B (en) * | 2021-09-28 | 2022-11-04 | 浙江科腾精工机械股份有限公司 | Hot extrusion molding equipment for square-head bolt |
| CN114101571A (en) * | 2021-12-01 | 2022-03-01 | 浙江汇丰汽车零部件股份有限公司 | Slotted bolt and processing method and die thereof |
| CN114101571B (en) * | 2021-12-01 | 2023-08-18 | 浙江汇丰汽车零部件股份有限公司 | Grooving bolt and processing method and die thereof |
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