CN201720312U

CN201720312U - Trimming die for crankshafts

Info

Publication number: CN201720312U
Application number: CN2010202083171U
Authority: CN
Inventors: 左占军
Original assignee: Dongfeng Motor Co Ltd
Current assignee: Dongfeng Commercial Vehicle Co Ltd
Priority date: 2010-05-25
Filing date: 2010-05-25
Publication date: 2011-01-26
Anticipated expiration: 2020-05-25

Abstract

Bent axle type side cut mould is equipped with the tongue including terrace die and the die of mutually supporting in the die, the incision direction slope down of the side cut guide surface of die, and side cut guide surface and horizontal plane institute angle alpha be 3 ~ 10. The utility model provides an aspect ratio at the tongue position of die when 2.5 above the short problem of mould life-span, prolonged the mould life-span, be applicable to the side cut of bent axle class forging.

Description

The crankshaft type shaving die

Technical field

The utility model relates to the forging field, relates in particular to the crankshaft type shaving die.

Background technology

Before the utility model proposes, the traditional structure of crankshaft type shaving die as shown in Figure 4, the side cut guide face is identical with finish-forging, the guide face of promptly cutting edge is a horizontal plane, such structure is applicable to that the length-width ratio at tongue position of die is at the mould below 2.5.And for the length-width ratio at the tongue position of die at the mould more than 2.5, adopt this structure the problem of mould cracking can often occur, die life is low, thereby has increased manufacturing cost.

The utility model content

The purpose of this utility model is in order to solve the deficiency that the above-mentioned background technology exists, to propose long crankshaft type shaving die of a kind of life-span.

For achieving the above object, the utility model adopts following technical scheme: the crankshaft type shaving die, comprise the punch and the die that cooperatively interact, in die, be provided with tongue, square neck is oblique down to it is characterized in that the cut-out direction of side cut guide face of described die, and side cut guide face and horizontal plane angulation α=3～10 °.

In such scheme, the length-width ratio at the tongue position of described die is more than or equal to 2.5, and smaller or equal to 3 o'clock, side cut guide face and horizontal plane angulation α=8 °.

In such scheme, the length-width ratio at the tongue position of described die is greater than 3, and smaller or equal to 3.5 o'clock, side cut guide face and horizontal plane angulation α=6.5 °.

In such scheme, the length-width ratio at the tongue position of described die is greater than 3.5 o'clock, side cut guide face and horizontal plane angulation α=and 5 °.

Principle of the present utility model is as follows:

As shown in Figure 4, the stressing conditions of the side cut guide face of prior art is simultaneously stressed for concentrating, and have a few is to the concentrated simultaneously moment that produces in A position in the H section of overlap when promptly cutting edge, and the A position is stressed bigger like this, bursts apart easily.

As shown in Figure 3, the side cut guide face of the distinctive band constant slope of the utility model, it is stressed to change A position stressed into segmented, and when promptly beginning, overlap H section and the contacted position of side cut guide face are a line, and the suffered moment in A position this moment is very little; Along with overlap moves downward, H section and the contacted position of side cut guide face increase gradually during side cut, and be so just that the stressed segmented that is improved to of the concentrated while at original A position is stressed, reduced the stressed of A position greatly, thereby prolong die life.

The utility model is simple in structure, and the length-width ratio at tongue position that has solved die has prolonged die life in short problem 2.5 die lifes when above, is applicable to the side cut of crankshaft type forging.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is that the B-B of Fig. 1 is to the sectional structure schematic diagram.

Fig. 3 is a structural analysis schematic diagram of the present utility model.

Fig. 4 is that prior art constructions is analyzed schematic diagram.

Among the figure: 1-die, 2-side cut guide face, 3-overlap, 4-tongue.

The specific embodiment

Present embodiment, the crankshaft type shaving die, comprise the punch and the die 1 that cooperatively interact, in die 1, be provided with tongue 4, square neck is oblique down for the cut-out direction of the side cut guide face 2 of described die 1, and side cut guide face 2 and horizontal plane angulation α=3～10 °, also square neck is oblique up for the cut-out direction of the guide face 2 of cutting edge certainly, but can increase mold materials consumption and Mould Machining expense like this.

When the length-width ratio at the tongue position of above-mentioned die 1 more than or equal to 2.5, and smaller or equal to 3 o'clock, side cut guide face and horizontal plane angulation α=8 °, can improve die life 30% this moment, mould can not ftracture.When the length-width ratio at the tongue position of described die 1 greater than 3, and smaller or equal to 3.5 o'clock, side cut guide face and horizontal plane angulation α=6.5 ° can improve die life 35%, mould can not ftracture.When the length-width ratio at the tongue position of described die 1 greater than 3.5 the time, side cut guide face and horizontal plane angulation α=5 ° can improve die life 48%, mould can not ftracture.

Claims

1. a crankshaft type shaving die comprises the punch and the die that cooperatively interact, is provided with tongue in die, and square neck is oblique down to it is characterized in that the cut-out direction of side cut guide face of described die, and side cut guide face and horizontal plane angulation α=3～10 °.

2. crankshaft type shaving die according to claim 1, the length-width ratio at tongue position that it is characterized in that described die be more than or equal to 2.5, and smaller or equal to 3 o'clock, side cut guide face and horizontal plane angulation α=8 °.

3. crankshaft type shaving die according to claim 1, the length-width ratio at tongue position that it is characterized in that described die be greater than 3, and smaller or equal to 3.5 o'clock, side cut guide face and horizontal plane angulation α=6.5 °.

4. crankshaft type shaving die according to claim 1, the length-width ratio at tongue position that it is characterized in that described die be greater than 3.5 o'clock, side cut guide face and horizontal plane angulation α=and 5 °.