CN211888626U

CN211888626U - Needle bearing M-shaped retainer window punching die

Info

Publication number: CN211888626U
Application number: CN201921732020.2U
Authority: CN
Inventors: 姜艳红; 郑小宝; 姚巧云; 李景阳; 郭晓玉; 杨威光; 王玉彪; 张俊超; 李金波
Original assignee: Zhongzhe High Speed Railway Bearing Co ltd
Current assignee: Zhongzhe High Speed Railway Bearing Co ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-11-10
Anticipated expiration: 2029-10-16

Abstract

The utility model relates to a needle bearing M-shaped retainer window hole punching die, which comprises an upper die and a lower die, wherein the cross section of the upper die is matched with the window hole, and the cutting edge at the lower end of the upper die is a three-section arc-shaped surface arc; the lower die is provided with a clamping structure matched with the shape of the inner ring of the retainer, and the clamping structure is provided with a cavity matched with the shape of the window hole. By adopting the utility model, the original M-shaped cutting edge is improved into a three-segment cambered surface shape, and the area of the upper die contacting the blanking surface of the retainer is reduced during blanking, thereby reducing the blanking pressure, reducing the pressure born by the lower die and preventing the die from breaking; meanwhile, in the blanking process, three sections of arcs of the upper die are slowly close to the M-shaped retainer, so that the radial deformation of the retainer is reduced; and set up suitable width coefficient and reduce the wearing and tearing between the mould through last mould and bed die, improved the life of mould, make product quality more stable.

Description

Needle bearing M-shaped retainer window punching die

Technical Field

The utility model relates to a bearing technical field, especially a bearing M type holder is towards fenestra mould.

Background

The window hole of the needle bearing M-shaped retainer is mostly processed by adopting a blanking mode, the structure of the existing processing die is shown as figure 2, the lower end of an upper die is an M-shaped cutting edge with the same shape as the retainer (shown as figure 1) on a lower die, and the upper die moves up and down to realize the blanking of the window hole. In the processing process of the window hole, the upper die and the lower die are frequently contacted and easily worn, the worn die needs to be frequently replaced, the cutting edge is contacted with the whole retainer during blanking, the contact area is large, the blanking force is large, the blanking waste passes through the cavity of the lower die, the lower die is subjected to large pressure, and the die is easily broken.

Disclosure of Invention

The utility model aims at providing a can improve mould life to the difficult cracked bearing M type holder of mould dashes fenestra mould when the blanking.

The utility model adopts the technical proposal that: a needle bearing M-shaped retainer window punching die comprises an upper die and a lower die, wherein the cross section of the upper die is matched with the shape of a window, a cutting edge at the lower end of the upper die is a three-section arc surface arc, the three-section arc surface is divided into a middle arc surface and two end arc surfaces, and the two end arc surfaces are provided with cutting planes with certain widths; the lower die is provided with a clamping structure matched with the shape of the inner ring of the retainer, and the clamping structure is provided with a cavity matched with the shape of the window hole.

The window punching die for the M-shaped retainer of the needle bearing is characterized in that the ratio of the depth of the middle arc-shaped surface to the depth of the arc-shaped surfaces at the two ends is 3: 8.

The needle bearing M-shaped retainer window punching die is characterized in that the depth of the middle arc-shaped surface is 0.6mm, and the depth of the two end arc-shaped surfaces is 1.6 mm.

The needle bearing M-shaped retainer window punching die is characterized in that the relation between the thickness X of a cutting edge of an upper die and the width Y of a cavity of a lower die is as follows: and Y is X + delta + t, wherein delta is the gap between the upper die and the lower die, t is the width coefficient of the lower die, and t is less than or equal to 0.3 mm.

The needle bearing M-shaped retainer window punching die is characterized in that t is not less than 0.1mm and not more than 0.3 mm.

By adopting the utility model, the original M-shaped cutting edge is improved into a three-segment cambered surface shape, and the area of the upper die contacting the blanking surface of the retainer is reduced during blanking, thereby reducing the blanking pressure, reducing the pressure born by the lower die and preventing the die from breaking; meanwhile, in the blanking process, three sections of arcs of the upper die are slowly close to the M-shaped retainer, so that the radial deformation of the retainer is reduced; and set up suitable width coefficient and reduce the wearing and tearing between the mould through last mould and bed die, improved the life of mould, make product quality more stable.

Drawings

Fig. 1 is a schematic structural view of a needle bearing M-shaped cage.

Fig. 2 is a schematic view of a prior art mold structure.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is a schematic perspective view of the upper mold of the present invention.

Fig. 5 is a schematic top view of the upper mold of the present invention.

Fig. 6 is a schematic perspective view of the lower mold of the present invention.

Fig. 7 is a schematic perspective view of the lower mold of the present invention.

Fig. 8 is a schematic top view of the lower mold of the present invention.

Fig. 9 is an enlarged view of the cavity at a in fig. 8.

Fig. 10 is a schematic diagram of the edge thickness X of the upper mold and the width Y of the cavity of the lower mold according to the present invention.

Fig. 11 is a schematic diagram of the present invention before blanking.

Fig. 12 is a schematic diagram of the blanking process of the present invention.

The numbers in the figure indicate: the device comprises an upper die 1, a lower die 2, a retainer 3, a cavity 4, a window hole 5, a clamping structure 6, a tangent plane 7, three sections of arc-shaped surfaces 8, a middle arc-shaped surface 9 and two end arc-shaped surfaces 10.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 3 to 10, the window hole punching die for the M-shaped retainer of the needle bearing comprises an upper die 1 and a lower die 2, wherein the cross section of the upper die 1 is matched with the window hole 5, a cutting edge at the lower end of the upper die 1 is a three-section arc-shaped surface 8, the three-section arc-shaped surface 8 is divided into a middle arc-shaped surface 9 and two end arc-shaped surfaces 10, and the two end arc-shaped surfaces 10 are provided with cutting planes 7 with certain widths; the lower die 2 is provided with a clamping structure 6 matched with the shape of the inner ring of the retainer 3, and the clamping structure 6 is provided with a cavity 4 matched with the shape of the window hole 5; the ratio of the depth of the middle arc-shaped surface 9 to the depth of the two end arc-shaped surfaces 10 is 3:8, the preferred depth a of the middle arc-shaped surface is 0.6mm, and the depth b of the two end arc-shaped surfaces is 1.6 mm.

In addition, in order to ensure the blanking quality of products with different thicknesses, the relation between the cutting edge thickness X of the upper die 1 and the width Y of the cavity 4 of the lower die 2 is as follows: and Y is X + delta + t, wherein delta is the gap between the upper die 1 and the lower die 2, t is the width coefficient of the lower die 2, and t is less than or equal to 0.3 mm. Preferably, the value range of t is more than or equal to 0.1mm and less than or equal to 0.3mm, and the specific size is correspondingly adjusted according to the actual product.

When punching is started, the upper die 1 is fixed on a machine tool by using a tool, the upper die 1 is a moving part, the lower die 2 is fixed on the machine tool by using the tool, the retainer 3 is placed on a clamping structure 6 of the lower die 2, the position of the window hole 5 of the retainer 3 is aligned with the cavity 4 of the lower die 2, and the lower die 2 is a fixed part.

As shown in fig. 11 and 12, the upper die 1 is arranged at the position shown in fig. 11 for preparing blanking, when the upper die 1 moves to the position shown in fig. 12, the blanking is completed, the length direction of the lower die 2 does not play a role of blanking, the length direction of the lower die 2 at this time only plays a role of discharging waste, namely, the length of the window hole 5 on the lower die 2 at this time is processed according to the design method of the upper die 1 of the utility model, so that the abrasion between the dies and the pressure born by the lower die 2 can be reduced. Compared with the structure of the upper die 1 before the modification, when blanking, the connecting blades of the middle arc of the cutting edge and the arcs at the two ends are firstly contacted with the retainer 3, the contact surface is only two blades, and compared with the original integral contact, the blanking at the two sides can be realized only by providing smaller pressure, so that the blanking force can be greatly reduced. When the upper die 1 continues to move downwards, the three sections of arc-shaped surfaces 8 of the upper die 1 can be attached to the surface of the M-shaped retainer 3, and a fixing effect is achieved, so that the radial deformation of the retainer 3 is reduced, the cutting parts are gradually close to the middle from two ends, the middle parts are changed from original blanking into shearing, and the pressure required by blanking is further reduced.

Claims

1. A needle bearing M-shaped retainer punching window hole die comprises an upper die and a lower die and is characterized in that the cross section of the upper die is matched with the shape of a window hole, a cutting edge at the lower end of the upper die is a three-section arc-shaped surface arc, the three-section arc-shaped surface is divided into a middle arc-shaped surface and two end arc-shaped surfaces, and the two end arc-shaped surfaces are provided with cutting planes with certain widths; the lower die is provided with a clamping structure matched with the shape of the inner ring of the retainer, and the clamping structure is provided with a cavity matched with the shape of the window hole.

2. The needle bearing M-cage window punching die as claimed in claim 1, wherein the ratio of the depth of the middle arc-shaped face to the depth of the arc-shaped faces at both ends is 3: 8.

3. The die for punching the window hole of the needle bearing M-shaped retainer as claimed in claim 1, wherein the depth of the middle arc-shaped surface is 0.6mm, and the depth of the two end arc-shaped surfaces is 1.6 mm.

4. The needle bearing M-cage window punching die as claimed in claim 1, wherein the relationship between the thickness X of the cutting edge of the upper die and the width Y of the cavity of the lower die is: and Y is X + delta + t, wherein delta is the gap between the upper die and the lower die, t is the width coefficient of the lower die, and t is less than or equal to 0.3 mm.

5. The needle bearing M-shaped retainer window hole punching die as claimed in claim 4, wherein t is within a value range of 0.1mm to 0.3 mm.