CN211304466U

CN211304466U - Small-end chamfering die device capable of preventing small end of tapered roller from being under-voltage

Info

Publication number: CN211304466U
Application number: CN201922345013.3U
Authority: CN
Inventors: 郭昊卿; 张亚纳
Original assignee: Henan Weichuang Bearing Precision Technology Co ltd
Current assignee: Henan Weichuang Bearing Precision Technology Co ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-08-21
Anticipated expiration: 2029-12-24

Abstract

The utility model relates to a tapered roller stamping equipment, specific tip chamfer mould device that can prevent tapered roller size end under-voltage that says so. The chamfering die comprises a chamfering die body and an ejector rod, wherein the ejector rod is installed in a step hole formed in the bottom of the chamfering die body in a matched mode, the cross section of the ejector rod is in a T shape corresponding to the shape of the step hole, the outer periphery of the large end of the ejector rod is in close sliding fit with the inner periphery of a large hole in the step hole, the small end of the ejector rod is provided with a circular arc-shaped bulge, the outer periphery of the small end of the ejector rod is in clearance fit with the inner periphery of a small hole in the step hole, and an exhaust hole for exhausting air between the outer periphery of the small end of the ejector rod and. The utility model discloses can avoid the big or small end that tapered roller stamping forming in-process produced to owe towards to avoid the oil gas that the stamping process easily produced to explode the phenomenon.

Description

Small-end chamfering die device capable of preventing small end of tapered roller from being under-voltage

Technical Field

The utility model relates to a tapered roller stamping equipment, specific tip chamfer mould device that can prevent tapered roller size end under-voltage that says so.

Background

The prior art small-end chamfer die for performing tapered roller punch forming generally comprises a chamfer die body and a mandril. A straight hole is formed in the bottom of the chamfering die body, and the periphery of the ejector rod is in close sliding fit in the straight hole so as to avoid the inclination of the ejector rod in the stamping process. And the ejector rod is positioned to be a plane and is flush with the bottom of the die groove on the chamfering die body after being matched with the chamfering die body.

The structure leads the air in the die cavity at the moment of stamping to be unable to be discharged, so that the small end of the tapered roller generates the understroke phenomenon due to the compression, and the large end also generates the understroke due to the violent turbulence of the air in the die cavity. Further, severe air compression in the stamping process can also lead to the die cavity bottom to produce oil gas explosion, and the high temperature in the twinkling of an eye that it produced can produce the corruption in the die cavity of chamfer mould body, produces irreversible damage to chamfer mould body.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can prevent the under-voltage tip chamfer mould device of tapered roller size end, the big or small end of avoiding tapered roller stamping forming in-process to produce is owed towards to avoid the oil gas that the stamping process easily produced to explode the phenomenon.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a can prevent tip chamfer mould device that tapered roller size end is under-voltage, including chamfer mould body and ejector pin, the ejector pin cooperation is installed in the step hole of seting up in chamfer mould body bottom, the cross sectional shape of ejector pin is the T shape corresponding with the shape in step hole, the periphery of ejector pin main aspects closely sliding fit with the interior circumference of macropore in the step hole, the tip of ejector pin has convex arch, the periphery of ejector pin tip and the interior circumference clearance fit of aperture in the step hole, be equipped with the exhaust hole that supplies the air discharge between the tip periphery of ejector pin and the aperture in the step hole on chamfer mould body.

Preferably, the exhaust hole is arranged along the horizontal direction, and an annular groove connected with the exhaust hole is arranged at the inner periphery of the small hole of the stepped hole.

Preferably, the height of the big end of the ejector rod is smaller than that of the big hole in the stepped hole.

Advantageous effects

The utility model discloses a there is the clearance between ejector pin week portion and the step hole, is equipped with the exhaust hole that supplies this clearance and external intercommunication on the chamfer mould body. During the punching process, gas is exhausted from the gap through the exhaust hole. Thereby the phenomenon of the small end and the small end of the tapered roller under-rush caused by the failure of exhausting is avoided, and the damage to the chamfering die body caused by high-temperature oil-gas explosion is avoided.

The utility model provides a ejector pin is T shape to set up the step hole that supplies the ejector pin cooperation installation in chamfer mould body lower part. The top of the ejector rod is provided with a circular arc-shaped bulge, so that the middle part of the lower end of the blank is stressed firstly in the stamping process of the tapered roller, the lower end of the blank is deformed uniformly from the middle part to the peripheral part, and the short-end understroke is further avoided. Correspondingly, the small end forms a process recess after being punched, so that the blank material is extruded to the large end, and the large end can also avoid underpunching. The arch at ejector pin top can also get into the clearance between ejector pin and the step hole by chamfer mould body to the air and play the guide effect at the stamping process, further improves the utility model discloses to the big or small end of tapered roller owe towards with the improvement effect that oil gas explodes.

The utility model discloses the main aspects and the step hole of well ejector pin closely sliding fit to form by this closely cooperating relation and produce crooked to the holistic guide effect of ejector pin, guarantee that the main part tip of ejector pin produces at the punching press in-process. The service life of the ejector rod is prolonged.

Drawings

Fig. 1 is a schematic view of the split of the present invention;

FIG. 2 is a schematic view of the present invention before stamping;

FIG. 3 is a schematic view of FIG. 2 after stamping;

the labels in the figure are: 1. chamfer mould body, 2, step hole, 3, ring channel, 4, exhaust hole, 5, arch, 6, ejector pin, 7, horizontal base, 8, lower clearance, 9, reset spring, 10, spring groove, 11, upper clearance.

Detailed Description

As shown in figure 1, the utility model discloses a can prevent the under-voltage tip chamfer mould device of tapered roller size end, including chamfer mould body 1 and ejector pin 6. A step hole 2 for the matching installation of the ejector rod 6 is arranged at the center of the bottom of the chamfering die body 1. The small hole in the step hole 2 is upward and connected with the die groove of the chamfering die body 1, and the large hole is downward for the ejector rod 6 to be matched and inserted.

The cross-sectional shape of the ejector pin 6 is a T-shape corresponding to the shape of the stepped hole 2. The outer periphery of the large end of the ejector rod 6 is in close sliding fit with the inner periphery of the large hole in the stepped hole 2, and the height of the large end of the ejector rod 6 is smaller than that of the large hole in the stepped hole 2. The small end of the ejector rod 6 is provided with an arc-shaped bulge 5, the outer periphery of the small end of the ejector rod 6 is in clearance fit with the inner periphery of the small hole in the step hole 2, and the chamfer die body 1 is provided with an exhaust hole 4 for exhausting air between the outer periphery of the small end of the ejector rod 6 and the inner periphery of the small hole in the step hole 2. The exhaust hole 4 is arranged along the horizontal direction, and the inner periphery of the small hole of the step hole 2 is provided with an annular groove 3 connected with the exhaust hole 4.

As shown in fig. 2, the utility model discloses set up on horizontal base 7 in using, the position that corresponds 6 main aspects of ejector pin on horizontal base 7 is equipped with spring groove 10, is equipped with reset spring 9 in the spring groove 10. Before punching, the ejector rod 6 is jacked up upwards under the action of the return spring 9, the position is limited through the step hole 2, and a lower gap 8 is formed between the bottom of the large end of the ejector rod 6 and the horizontal base 7. As shown in fig. 3, after punching, the top rod 6 integrally drops to be flush with the horizontal base 7 along with the punching force, and the bulge 5 at the top of the top rod 6 contacts with the middle part of the lower end of the blank to complete punching. Air in the stamping process enters the annular groove 3 from the peripheral surface of the small end of the ejector rod 6 and the inner peripheral part of the small hole in the step hole 2 and is finally discharged from the exhaust hole 4, and at the moment, an upper gap 11 is formed between the upper edge of the large end of the ejector rod 6 and the step position in the step hole 2. After the punching is finished, the return spring 9 jacks up the mandril 6 again to the state shown in figure 2 along with the disappearance of the punching pressure. The ejector rod 6 ejects the molding tapered roller in the yeast body to realize demoulding. In the actual punch forming of the tapered roller, a middle die and a top die are sequentially arranged on the upper part of the chamfering die body 1. It is not shown in the drawings since it is a conventional general technique in the art and is not very relevant to the present invention.

Claims

1. The utility model provides a can prevent that tapered roller size end is under-voltage tip chamfer mould device, includes chamfer mould body (1) and ejector pin (6), its characterized in that: the ejector rod (6) is installed in a step hole (2) formed in the bottom of the chamfering die body (1) in a matched mode, the cross section of the ejector rod (6) is in a T shape corresponding to the shape of the step hole (2), the outer periphery of the large end of the ejector rod (6) is in close sliding fit with the inner periphery of a large hole in the step hole (2), the small end of the ejector rod (6) is provided with a circular arc-shaped bulge (5), the outer periphery of the small end of the ejector rod (6) is in clearance fit with the inner periphery of the small hole in the step hole (2), and an exhaust hole (4) for exhausting air between the outer periphery of the small end of the ejector rod (6) and the inner periphery of the small hole in the step hole (2) is formed in.

2. The small-end chamfering die device capable of preventing the size end of the tapered roller from being under-pressurized as claimed in claim 1, wherein: the exhaust hole (4) is arranged along the horizontal direction, and an annular groove (3) connected with the exhaust hole (4) is arranged at the inner periphery of the small hole of the stepped hole (2).

3. The small-end chamfering die device capable of preventing the size end of the tapered roller from being under-pressurized as claimed in claim 1, wherein: the height of the large end of the ejector rod (6) is less than that of the large hole in the stepped hole (2).