CN218744312U - Special-shaped punch - Google Patents
Special-shaped punch Download PDFInfo
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- CN218744312U CN218744312U CN202222475187.3U CN202222475187U CN218744312U CN 218744312 U CN218744312 U CN 218744312U CN 202222475187 U CN202222475187 U CN 202222475187U CN 218744312 U CN218744312 U CN 218744312U
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Abstract
The utility model discloses a special-shaped punch, which is additionally provided with a filtering section between the original large-diameter section and the small-diameter section, the axial section of the transition section is in an isosceles trapezoid shape, and the included angle between the two sides is 90 degrees; the diameter D of the large-diameter section is smaller than the diameter D of the large-diameter end of the transition section, so that the tensile resistance is reduced, the strength of the punch is enhanced, the phenomena of locking and punch breakage can be effectively prevented, and the technical problem existing in the prior art is effectively solved.
Description
Technical Field
The utility model belongs to the technical field of tensile drift and specifically relates to a dysmorphism drift is related to, its condition such as moving in the stretch processing, the locking of quiet mould and drift fracture effectively prevents.
Background
The punch refers to a metal part on a stamping die in a machine tool, and is called a punch rod, a punch pin or a punch, and is installed on the stamping die to perform continuous punching, stamping and breaking operation, so that a processed material is separated or plastically deformed, and a required finished product or a semi-finished product is obtained.
As shown in fig. 1 and 2, the existing punch a is T-shaped, and the vertical section is a linear stepped shaft, and is inserted into the cylindrical workpiece B, and in the actual use process of the punch a, the joint of the stages has a large diameter difference, so that the punch a is damaged and scrapped due to the locking phenomenon of the guide actuating mechanism and the stationary die in the die splitting process, and the punch in the stretching state and the fracture condition, which directly improves the processing cost and reduces the processing efficiency.
Therefore, how to improve the structure of the punch a and solve the problems of locking of the movable die and the stationary die, breaking of the punch and the like in the prior art is one of the technical problems to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem who exists among the prior art, the utility model aims to provide a special-shaped punch, it effectively prevents to move in the stretch processing, the quiet mould locking and the condition such as drift fracture.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a dysmorphism drift, it is a cylindricality body, includes the minor diameter section, major diameter section and the head segment that increase in proper order along its axial diameter, wherein:
a transition section is arranged between the small-diameter section and the large-diameter section, and the transition section is in a circular truncated cone shape;
the axial section of the transition section is in an isosceles trapezoid shape, and the included angle between two sides of the transition section is 90 degrees;
the diameter D of the large-diameter section is smaller than the diameter D of the large-diameter end of the transition section.
Further preferred is: the difference between the diameter A of the large-diameter end of the transition section and the diameter B of the large-diameter section is 2mm to 3mm.
Further preferred is: the edges of the two ends of the large-diameter section are provided with arc chamfers arched towards the axis direction.
Further preferably: one end of the transition section, which is close to the large-diameter section, is the large-diameter end, and the large-diameter end extends towards the direction of the large-diameter section to obtain an extension section.
Further preferably: the axial length of the extension section is 1-1.5mm.
Further preferred is: the edge of one end of the small-diameter section, which is far away from the large-diameter section, is provided with a 45-degree chamfer.
Further preferred is: the axial section of the head section is T-shaped.
After the technical scheme is adopted, compared with the background art, the utility model, have following advantage:
the utility model adds a filtering section between the original large diameter section and the small diameter section, and the axial section of the transition section is in the shape of an isosceles trapezoid, and the included angle between the two waists is 90 degrees; the diameter D of the large-diameter section is smaller than the diameter D of the large-diameter end of the transition section, so that the tensile resistance is reduced, the strength of the punch is enhanced, the phenomena of locking and punch breakage can be effectively prevented, and the technical problem existing in the prior art is effectively solved.
Drawings
FIG. 1 is a schematic view of a prior art punch;
FIG. 2 is a schematic view of the punch of FIG. 1 inserted into a cylindrical workpiece to be stretched;
fig. 3 is a schematic structural diagram of the special-shaped punch in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are all based on the orientation or position relationship shown in the drawings, and are only for convenience of description and simplification of the present invention, but do not indicate or imply that the device or element of the present invention must have a specific orientation, and thus, should not be construed as limiting the present invention.
Examples
As shown in fig. 3, a profile punch, which is a cylindrical body, includes a small diameter section 300, a large diameter section 200, and a head section 100, which are sequentially increased in diameter along an axial direction thereof.
As shown in fig. 3, the head section 100 is cylindrical and includes a first portion and a second portion integrally connected with each other, the first portion has a larger diameter than the second portion, and the first portion is disposed away from the small diameter section 300; a chamfer is arranged at the edge of one end of the first head part, which is far away from the small-diameter section 300, a truncated cone-shaped connecting section is arranged at one end of the second head part, which is close to the first head part, and the large-diameter end of the connecting section is connected with the first head part; and a chamfer is arranged at one end of the first head part, which is far away from the second head part.
The strength of the punch can be effectively improved by the aid of the chamfer, and convenience in the assembling process can be realized.
As shown in fig. 3, the large diameter section 200 is cylindrical, and the diameter of the large diameter section is smaller than that of the first two parts, and the edges of the two ends of the large diameter section 200 are provided with circular arc chamfers R which are raised towards the axial direction, in particular: the large-diameter section 200 is close to one end of the second head part, and the arc-shaped chamfer R at the end effectively increases the strength of the joint and avoids the situation that the joint is easy to break in the machining operation.
As shown in fig. 3, the small diameter section 300 is cylindrical, and the diameter of the small diameter section is smaller than that of the large diameter section 200, and a 45-degree chamfer is arranged at an edge of one end of the small diameter section 300, which is far away from the large diameter section 200, so that the inner wall of a product can be prevented from being scraped during stretching, and the punch can be prevented from being broken.
Of particular note are: as shown in fig. 3, a transition section 400 is disposed between the small diameter section 300 and the large diameter section 200, and the transition section 400 is in the shape of a circular truncated cone; the axial section of the transition section 400 is in an isosceles trapezoid shape, and the included angle C between the two sides of the transition section is 90 degrees, so that the drawing resistance of the punch is reduced during drawing operation; the diameter B of the large-diameter section 200 is smaller than the diameter a of the large-diameter end of the transition section 400, specifically: the difference between the diameter A of the large-diameter end of the transition section 400 and the diameter B of the large-diameter section 200 is 2mm to 3mm, namely: A-B =2 to 3mm, and the diameter difference forms a necking structure to avoid negative pressure generated by tight combination of processed products, so that the demoulding resistance is reduced. The end of the transition section 400 close to the large-diameter section 200 is the large-diameter end, the large-diameter end extends towards the large-diameter section 200 to obtain an extension section, and the axial length of the extension section is 1-1.5mm so as to adapt to the inner hole diameter of the cylindrical workpiece B.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A dysmorphism drift which characterized in that: it is a cylindricality, includes along its axial diameter minor diameter section, major diameter section and the head segment that increases in proper order, wherein:
a transition section is arranged between the small-diameter section and the large-diameter section, and the transition section is in a circular truncated cone shape;
the axial section of the transition section is in an isosceles trapezoid shape, and the included angle between two waists of the transition section is 90 degrees;
the diameter D of the large-diameter section is smaller than the diameter D of the large-diameter end of the transition section.
2. A shaped punch as claimed in claim 1, wherein: the difference between the diameter A of the large-diameter end of the transition section and the diameter B of the large-diameter section is 2mm to 3mm.
3. A shaped punch as claimed in claim 1, wherein: the edges of the two ends of the large-diameter section are provided with arc chamfers arched towards the axis direction of the large-diameter section.
4. A shaped punch as claimed in claim 2, wherein: one end of the transition section, which is close to the large-diameter section, is the large-diameter end, and the large-diameter end extends towards the direction of the large-diameter section to obtain an extension section.
5. A shaped punch as claimed in claim 4, wherein: the axial length of the extension section is 1-1.5mm.
6. A shaped punch as claimed in claim 1, wherein: the minor diameter section is kept away from the one end border of major diameter section sets up 45 degrees chamfers.
7. A shaped punch as claimed in claim 1, wherein: the axial section of the head section is T-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222475187.3U CN218744312U (en) | 2022-09-19 | 2022-09-19 | Special-shaped punch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222475187.3U CN218744312U (en) | 2022-09-19 | 2022-09-19 | Special-shaped punch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218744312U true CN218744312U (en) | 2023-03-28 |
Family
ID=85694970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222475187.3U Active CN218744312U (en) | 2022-09-19 | 2022-09-19 | Special-shaped punch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218744312U (en) |
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2022
- 2022-09-19 CN CN202222475187.3U patent/CN218744312U/en active Active
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