CN221336480U - Hollow punch with center positioning ejector rod - Google Patents
Hollow punch with center positioning ejector rod Download PDFInfo
- Publication number
- CN221336480U CN221336480U CN202323241128.0U CN202323241128U CN221336480U CN 221336480 U CN221336480 U CN 221336480U CN 202323241128 U CN202323241128 U CN 202323241128U CN 221336480 U CN221336480 U CN 221336480U
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- China
- Prior art keywords
- punch
- ejector rod
- positioning ejector
- hole
- face
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- 238000005242 forging Methods 0.000 claims abstract description 23
- 238000006073 displacement reaction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Abstract
The utility model relates to a hollow punch with a central positioning ejector rod, which comprises a forging lower die and a punch, wherein a KO column is inserted in the forging lower die, the punch is positioned right above the KO column, a vertical guide hole is formed in the lower end face of the punch, and a limit hole communicated with the guide hole is formed in the upper end face of the punch; the locating ejector rod is inserted into the guide hole of the punch, a cylindrical limiting head is formed at the upper end of the locating ejector rod, and the limiting head is inserted into the limiting hole of the punch. The punch is designed to be of a hollow structure, a central ejector rod is arranged in a hollow hole of the punch, and the central ejector rod can be abutted against a workpiece to limit displacement of the workpiece before forging and forming.
Description
Technical field:
the utility model relates to the technical field of forging dies, in particular to a hollow punch with a centrally positioned ejector rod.
The background technology is as follows:
The existing common bearing comprises an outer ring, an inner ring, balls and a retainer, wherein the outer ring and the inner ring are called as ferrules, the ferrules are machined by a circular blank, the blank is generally a cake material with a shape of a bar passing through a upsetting cake, the whole body of the cake material is cylindrical, the upper end face and the lower end face are both flat, then the blank is machined to form a formed part of the bearing ferrule by a forging mode, a punch is matched with a forging lower die to realize the shaping of a workpiece in the forging process, as shown in fig. 1, a KO column 3 is arranged in the forging lower die 1, the workpiece 4 (namely, the blank) is abutted against the upper end of the KO column 3, the diameter of the workpiece 4 is larger than that of the KO column 3, the punch 2 is generally far away from the workpiece 4, and the workpiece 4 is moved to the KO column 3 of the forging lower die 1 by a mechanical clamping jaw, and before the punch 2 falls into contact with the workpiece 4, the problem of displacement of the workpiece 4 occurs due to vibration and the like; when the workpiece 4 is displaced, forging forming quality is affected. It is necessary to design a corresponding structure to solve the displacement problem of the work 4.
Therefore, a floating ejector rod is additionally arranged on the punch, and the ejector rod is abutted against the workpiece to limit the displacement of the workpiece before the punch is not contacted with the workpiece.
The utility model comprises the following steps:
The utility model aims at overcoming the defects of the prior art, and provides a hollow punch with a central positioning ejector rod.
The hollow punch with the central positioning ejector rod comprises a forging lower die and a punch, wherein a KO column is inserted in the forging lower die, the punch is positioned right above the KO column, a vertical guide hole is formed in the lower end face of the punch, and a limit hole communicated with the guide hole is formed in the upper end face of the punch; the locating ejector rod is inserted into the guide hole of the punch, a cylindrical limiting head is formed at the upper end of the locating ejector rod, and the limiting head is inserted into the limiting hole of the punch.
Preferably, the horizontal section of the positioning ejector rod is circular, and the central axis of the positioning ejector rod, the central axis of the limiting head and the central axis of the punch are on the same straight line.
Preferably, the diameter of the outer wall of the positioning ejector rod is equal to the diameter of the guide hole on the punch, and the diameter of the limit hole is larger than the diameter of the limit head at the upper end of the positioning ejector rod.
Preferably, the lower end of the positioning ejector rod extends out of the lower end face of the punch, and the distance from the lower end of the positioning ejector rod to the lower end face of the punch is equal to the distance from the upper end face of the limiting head to the upper end face of the punch.
Preferably, a plane type cutting groove is formed on the outer wall of one side of the positioning ejector rod, and an exhaust hole is formed on the bottom surface of the cutting groove and the inner wall of the guide hole on the punch in a surrounding mode.
Preferably, the distance from the bottom surface of the upper cutting groove of the positioning ejector rod to the central axis of the positioning ejector rod is equal to 1/10 of the radius of the outer wall of the positioning ejector rod.
The utility model has the beneficial effects that:
The punch is designed to be of a hollow structure, a central ejector rod is arranged in a hollow hole of the punch, and the central ejector rod can be abutted against a workpiece to limit displacement of the workpiece before forging and forming.
Description of the drawings:
FIG. 1 is a schematic cross-sectional view of a conventional forging die;
FIG. 2 is a schematic cross-sectional view of the present utility model;
fig. 3 is a schematic bottom view of a punch part of the present utility model.
In the figure: 1. forging a lower die; 2. a punch; 21. a guide hole; 22. a limiting hole; 3. a KO column; 4. a workpiece; 5. positioning the ejector rod; 51. a positioning head; 52. grooving; a. and an exhaust hole.
The specific embodiment is as follows:
Examples: referring to fig. 2, a hollow punch with a central positioning ejector rod comprises a forging lower die 1 and a punch 2, wherein a KO column 3 is inserted in the forging lower die 1, the punch 2 is positioned right above the KO column 3, a vertical guide hole 21 is formed in the lower end surface of the punch 2, and a limit hole 22 communicated with the guide hole 21 is formed in the upper end surface of the punch 2; a positioning ejector rod 5 is inserted into the guide hole 21 of the punch 2, a cylindrical limiting head 51 is formed at the upper end of the positioning ejector rod 5, and the limiting head 51 is inserted into the limiting hole 22 of the punch 2; the lower end of the positioning ejector rod 5 extends out of the lower end face of the punch 2 and abuts against the upper end face of the workpiece 4, the lower end face of the workpiece 4 abuts against the KO column 3, the upper end face of the KO column 3 is flush with the upper end face of the forging lower die 1, and the movement of the workpiece 4 can be limited through the positioning ejector rod 5.
The horizontal section of the positioning ejector rod 5 is circular, the central axis of the positioning ejector rod 5, the central axis of the limiting head 51 and the central axis of the punch 2 are on the same straight line, and the central axes of the guide hole 21 and the limiting hole 22 are consistent with the central axis of the punch 2.
The diameter of the outer wall of the positioning ejector rod 5 is equal to the diameter of the guide hole 21 on the punch head 2, and the diameter of the limit hole 22 is larger than the diameter of the limit head 51 at the upper end of the positioning ejector rod 5.
The distance from the lower end of the positioning ejector rod 5 to the lower end face of the punch head 2 is equal to the distance from the upper end face of the positioning head 51 to the upper end face of the punch head 2, a cushion block is arranged at the top of the punch head 2 during punching of the punch head 2, and the cushion block can limit the positioning head 51 to be separated from the upper end face of the punch head 2, so that when the positioning head 51 abuts against the cushion block, the lower end face of the positioning ejector rod 5 is flush with the lower end face of the punch head 2, and the lower end face of the punch head 2 becomes a structural face of the lower end of the punch head 2.
As shown in fig. 2 and 3, a planar cutting groove 52 is formed on the outer wall of one side of the positioning ejector rod 5, an exhaust hole a is formed on the bottom surface of the cutting groove 52 and the inner wall of the guide hole 21 on the punch 2, and the exhaust hole a is arranged between the punch 2 and the positioning ejector rod 5, so that exhaust can be realized in the stamping and forging process.
The distance from the bottom surface of the cutting groove 52 on the positioning ejector rod 5 to the central axis of the positioning ejector rod 5 is equal to 1/10 of the radius of the outer wall of the positioning ejector rod 5, namely, the hole of the vent hole a is smaller, and the construction surface of the forged workpiece is not affected.
Working principle: the utility model relates to a hollow punch with a central positioning ejector rod, which is provided with a step hole structure formed by a guide hole 21 and a limit hole 22 on a punch 2, wherein a positioning ejector rod 5 is arranged in the step hole, the positioning ejector rod 5 can be abutted against a workpiece 2 based on dead weight, as shown in fig. 2, and the positioning ejector rod 5 further limits the displacement of the workpiece 2; meanwhile, the positioning ejector rod 5 is provided with the limiting head 51 which can prevent the positioning ejector rod 5 from being separated from the punch 2, and after forging is completed, the punch 2 moves upwards to drive the positioning ejector rod 5 to be separated from the forging lower die 1.
The examples are presented to illustrate the utility model and are not intended to limit the utility model. Modifications to the described embodiment may occur to those skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model is therefore set forth in the appended claims.
Claims (6)
1. The utility model provides a hollow punch with center location ejector pin, includes forging lower mould (1) and drift (2), and the interpolation of forging lower mould (1) is equipped with KO post (3), and drift (2) are located KO post (3) directly over its characterized in that: a vertical guide hole (21) is formed in the lower end surface of the punch (2), and a limit hole (22) communicated with the guide hole (21) is formed in the upper end surface of the punch; the positioning ejector rod (5) is inserted into the guide hole (21) of the punch (2), a cylindrical limiting head (51) is formed at the upper end of the positioning ejector rod (5), and the limiting head (51) is inserted into the limiting hole (22) of the punch (2).
2. A hollow punch with a centrally located ram as claimed in claim 1, wherein: the horizontal section of the positioning ejector rod (5) is circular, and the central axis of the positioning ejector rod (5), the central axis of the limiting head (51) and the central axis of the punch (2) are on the same straight line.
3. A hollow punch with a centrally located ram as claimed in claim 2, wherein: the diameter of the outer wall of the positioning ejector rod (5) is equal to the diameter of a guide hole (21) on the punch (2), and the diameter of a limit hole (22) is larger than the diameter of a limit head (51) at the upper end of the positioning ejector rod (5).
4. A hollow punch with a centrally located ram as claimed in claim 3, wherein: the lower end of the positioning ejector rod (5) extends out of the lower end face of the punch (2), and the distance from the lower end of the positioning ejector rod (5) to the lower end face of the punch (2) is equal to the distance from the upper end face of the limiting head (51) to the upper end face of the punch (2).
5. A hollow punch with a centrally located ram as claimed in claim 4, wherein: a planar cutting groove (52) is formed in the outer wall of one side of the positioning ejector rod (5), and an exhaust hole (a) is formed in the bottom surface of the cutting groove (52) and the inner wall of the guide hole (21) in the punch (2) in a surrounding mode.
6. A hollow punch with a centrally located ram as claimed in claim 5, wherein: the distance from the bottom surface of the upper cutting groove (52) of the positioning ejector rod (5) to the central axis of the positioning ejector rod (5) is equal to 1/10 of the radius of the outer wall of the positioning ejector rod (5).
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221336480U true CN221336480U (en) | 2024-07-16 |
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| GR01 | Patent grant |