CN211276124U

CN211276124U - Punching die for inner gear disc of flywheel

Info

Publication number: CN211276124U
Application number: CN201922232015.1U
Authority: CN
Inventors: 李晓锋; 孙勇
Original assignee: Jingjiang Sanpeng Mould Technology Co ltd
Current assignee: Jingjiang Sanpeng Mould Technology Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-08-18
Anticipated expiration: 2029-12-13

Abstract

The utility model discloses a flywheel inner fluted disc punching die, include last mould, be located go up the lower mould of mould below, slide the drift that sets up along the vertical direction, go up the mould with form the installation cavity of product between the lower mould, go up the mould and offer the confession along the vertical direction on the lower mould the perforation that the drift passed, the lower terminal surface of drift include first plane, second plane and connect in first plane with inclined plane between the second plane, first planar vertical height is less than the planar vertical height of second, with former flat knife drift processing back, ensure to be close to product step diameter department drift and have less contact surface to the shearing force of punching press has been increased, the deformation of product has been reduced.

Description

Punching die for inner gear disc of flywheel

Technical Field

The utility model relates to a flywheel inner fluted disc punching die.

Background

When the existing flywheel inner fluted disc is punched, and after the step extrusion of a product is finished, because the step with the size controlled by the requirement of a drawing is closer to the required hole distance of the product, when a flat cutter punch head is directly used in the prior art (as shown in figure 4), the diameter of the step of the product is deformed in an out-of-tolerance mode and does not accord with the drawing.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect that exists among the prior art, provide a fluted disc punching die in flywheel, solve the out-of-tolerance deformation problem of product step diameter.

In order to realize the above object, the technical scheme of the utility model a flywheel inner gear dish punching die is provided, include last mould, be located go up the lower mould of mould below, slide the drift that sets up along the vertical direction, go up the mould with form the installation cavity of product between the lower mould, go up the mould and the confession has been seted up along the vertical direction on the lower mould the perforation that the drift passed, its characterized in that: the lower end face of the punch comprises a first plane, a second plane and a slope connected between the first plane and the second plane, and the vertical height of the first plane is lower than that of the second plane.

The further improvement is that: the area of the first plane is smaller than the area of the second plane.

The further improvement is that: the punch is provided with a plurality of punches which are uniformly distributed on a circumference which takes the center of the product as the center of a circle.

The further improvement is that: the first plane of the punch is close to the outer side of the circumference of the distribution of the plurality of punches.

The utility model has the advantages and the beneficial effects that: after the original flat cutter punch is processed, the punch close to the step diameter of the product is ensured to have a smaller contact surface, so that the shearing force of punching is increased, and the deformation of the product is reduced.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of a product;

FIG. 3 is a sectional view of the product;

FIG. 4 is a schematic view of a master punch;

fig. 5 is a schematic view of the punch according to the present invention.

Wherein: 1. an upper die; 2. a lower die; 3. a punch; 4. a first plane; 5. a second plane; 6. a bevel.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 2 and 3, when a plurality of holes around the cylindrical step of the inner fluted disc of the flywheel are machined, the straight punch is adopted, and the step with the size controlled according to the drawing requirement is closer to the required hole of the product, so that the profile and the diameter of the product at the position of the diameter step are deformed.

As shown in fig. 1 and 5, the flywheel internal toothed disc punching die comprises an upper die 1, a lower die 2 located below the upper die 1, and a punch 3 arranged to slide along a vertical direction, wherein an installation cavity of a product is formed between the upper die 1 and the lower die 2, the upper die 1 and the lower die 2 are provided with a through hole along the vertical direction, the punch 3 penetrates through the through hole, the lower end surface of the punch 3 comprises a first plane 4, a second plane 5 and an inclined surface 6 connected between the first plane 4 and the second plane 5, and the vertical height of the first plane 4 is lower than that of the second plane 5.

In order to increase the shear force, the preferred embodiment of the present invention is that the area of the first plane 4 is smaller than the area of the second plane 5.

In order to improve the processing efficiency, the punch 3 is provided with a plurality of punches, and the punches 3 are uniformly distributed on a circumference which takes the center of the product as the center.

In order to be able to guarantee a product profile at the diameter step and not to deform, the first plane 4 of the punch is close to the outside of the circumference where the plurality of punches 3 are distributed.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a flywheel inner fluted disc punching die, includes the mould, is located go up the lower mould of mould below, slide the drift that sets up along the vertical direction, go up the mould with form the installation cavity of product between the lower mould, go up the mould and offer the confession along the vertical direction on the lower mould the perforation that the drift passed, its characterized in that: the lower end face of the punch comprises a first plane, a second plane and a slope connected between the first plane and the second plane, and the vertical height of the first plane is lower than that of the second plane.

2. The flywheel internal toothed disc punching die according to claim 1, wherein: the area of the first plane is smaller than the area of the second plane.

3. The flywheel internal toothed disc punching die according to claim 1, wherein: the punch is provided with a plurality of punches which are uniformly distributed on a circumference which takes the center of the product as the center of a circle.

4. The flywheel inner toothed disc punching die of claim 3, wherein: the first plane of the punch is close to the outer side of the circumference of the distribution of the plurality of punches.