CN214557083U

CN214557083U - Closed forging die with wheel shaft

Info

Publication number: CN214557083U
Application number: CN202120166172.1U
Authority: CN
Inventors: 王子孝; 陈忠
Original assignee: Chongqing Qixin Auto Parts Co ltd
Current assignee: Chongqing Qixin Auto Parts Co ltd
Priority date: 2021-01-21
Filing date: 2021-01-21
Publication date: 2021-11-02
Anticipated expiration: 2031-01-21

Abstract

The utility model discloses a closed forging die of band pulley axle, including upper die base and die holder, be equipped with the upper die on the upper die base, be equipped with the first cavity of waiting to process the band pulley axle on the upper die, be equipped with the lower mould on the die holder, the lower mould is equipped with the second cavity of waiting to process the band pulley axle, and when closing, the first cavity of upper die and the second cavity of lower mould form the band pulley axle die cavity; a base plate is arranged between the upper die base and the lower die, a top rod is movably arranged on the base plate, the top rod is communicated with the second cavity of the lower die, and a first positioning boss matched with the first cavity of the upper die is further arranged on the lower die. The utility model has the advantages of simple structure, avoided the overlap to produce, the cost is reduced.

Description

Closed forging die with wheel shaft

Technical Field

The utility model relates to a processing field of band pulley axle, in particular to mould is forged to closed of band pulley axle.

Background

The existing forging method of the belt wheel shaft of the automobile engine adopts an open forging process, as shown in figure 1, an open forging die has the following defects;

1. the mould is too heavy to cause the difficulty of disassembly, and the mould is required to be disassembled by means of a travelling crane, so that manpower and material resources are wasted in disassembling and assembling the mould;

2. the forging force is large in the use process of the open forging die, the die is easy to deform, and a product is not easy to demould after the die deforms, so that the die is serious in annealing, the service life of the die is short, the die changing frequency is high, and the repair cost of the die is increased;

3. during open forging, the metal flows too fast, so that the tooth shape and the rod part of the product are seriously lack of materials, the appearance quality of the product is poor, and the product is greatly scrapped;

4. open type flash exists in open type forging, and the material utilization rate is low;

5. the open forging requires trimming, so that the equipment cost and the labor cost are increased;

6. after the open forging edge cutting, the metal fiber is exposed outside, the metal fiber at the edge cutting position is easy to corrode, and the subsequent rework treatment cost is increased.

Disclosure of Invention

The utility model aims at the not enough of prior art, provide a closed forging mould of band pulley axle, this simple structure has avoided the overlap to produce, the cost is reduced.

The technical scheme of the utility model is that:

the closed forging die for the belt wheel shaft comprises an upper die holder and a lower die holder, wherein an upper die is arranged on the upper die holder, a first concave cavity of the belt wheel shaft to be machined is formed in the upper die, a lower die is arranged on the lower die holder, a second concave cavity of the belt wheel shaft to be machined is formed in the lower die, and when the closed forging die is closed, a belt wheel shaft cavity is formed by the first concave cavity of the upper die and the second concave cavity of the lower die; a base plate is arranged between the upper die base and the lower die, a top rod is movably arranged on the base plate, the top rod is communicated with the second cavity of the lower die, and a first positioning boss matched with the first cavity of the upper die is further arranged on the lower die.

Further, the upper die sleeve is sleeved outside the upper die, and the lower die sleeve is sleeved outside the lower die.

Furthermore, go up the mould with go up and be equipped with the second location boss of mutually supporting between the mould cover, the lower mould with be equipped with the third location boss of mutually supporting between the lower mould cover.

Furthermore, the upper die sleeve is provided with a second hoisting hole, and the lower die sleeve is provided with a third hoisting hole.

Further, the thickness of the backing plate is 70-90 mm.

Furthermore, an ejector rod mounting hole is formed in the base plate, the ejector rod is of an inverted T-shaped structure, the small-diameter section of the ejector rod is in sliding fit with the second concave cavity of the lower die, and the large-diameter section of the ejector rod is matched with the ejector rod mounting hole of the base plate.

Furthermore, the outer side wall of the lower die is also provided with a first hoisting hole.

Adopt above-mentioned technical scheme to have following beneficial effect:

1. the closed forging material has high utilization rate, and the utilization rate of the material is improved from 80% to 90%; the material is saved remarkably;

2. the closed die is smaller than the initial die in shape and light in weight, so that the die cost is remarkably saved, the die is convenient to mount, the mounting and dismounting time of the die is shortened, and the working efficiency is improved;

3. the closed forging has no trimming process, so that the production labor cost is reduced, and the forging beat is shortened; one forging device is omitted, so that the device consumption and the investment and manufacture of the trimming die are reduced; the manufacturing cost of the die, the labor cost and the waste of equipment capacity are obviously reduced;

4. the closed forged pulley shaft is very close to a finished product, the metal fiber completely follows the shape, and the deformed metal flows in a three-dimensional pressure state, so that the improvement of the plasticity of a metal material is facilitated, and the loose structure in the forging can be effectively prevented, so that the mechanical property of the product is improved, in addition, the forged piece has no flash, and the fiber exposure for trimming can not be formed, which is favorable for the corrosion-resistant atmosphere of parts;

5. the machining cost is saved, the allowance of the closed forging piece is small, residual flash existing in the process of cutting off the flash does not exist, the machining working hours of the subsequent working procedures can be effectively reduced, the loss of a machine tool and a cutter is reduced, and the machining cost is saved;

6. the closed die has basically consistent heat absorption and heat dissipation, ensures the temperature of the matrix of the die, prevents the die from annealing and cracking easily, and effectively prolongs the service life of the die.

The following description is further described in conjunction with the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a schematic structural diagram of a conventional open forging die

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

FIG. 3 is a schematic structural view of an upper mold of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

fig. 5 is a schematic structural view of the lower mold of the present invention;

fig. 6 is a schematic structural diagram of the push rod of the present invention.

In the attached drawing, 1 is an upper die, 1-1 is a first cavity, 2 is an upper die sleeve, 3 is a second positioning boss, 4 is a second hoisting hole, 5 is a lower die, 5-1 is a second cavity, 6 is a first positioning boss, 7 is a first hoisting hole, 8 is a lower die sleeve, 9 is a base plate, 10 is an ejector rod, 11 is a third positioning boss, and 12 is a third hoisting hole.

Detailed Description

Specific example 1:

referring to fig. 2 to 6, the closed forging die for the belt wheel shaft comprises an upper die holder and a lower die holder, wherein an upper die 1 is arranged on the upper die holder, a first cavity 1-1 of the belt wheel shaft to be processed is arranged on the upper die 1, an upper die sleeve 2 is sleeved outside the upper die 1, a second positioning boss 3 which is matched with the upper die sleeve 2 is arranged between the upper die 1 and the upper die sleeve 2, and a second hoisting hole 4 is arranged on the upper die sleeve 2.

The lower die base is provided with a lower die 5, the lower die 5 is provided with a second concave cavity 5-1 of a belt pulley shaft to be processed, the upper end surface of the lower die 5 is also provided with a first positioning boss 6 used for being matched with the first concave cavity 5-1 of the upper die 1, and when the lower die is closed, the first concave cavity 1-1 of the upper die 1 and the second concave cavity 5-1 of the lower die 5 form a belt pulley shaft cavity; the outer side wall of the lower die 5 is provided with a first hoisting hole 7. A lower die sleeve 8 is sleeved outside the lower die 5, a third positioning boss 11 which is mutually matched is arranged between the lower die 5 and the lower die sleeve 8, a third hoisting hole 12 is arranged on the lower die sleeve 8,

a base plate 9 is arranged between the upper die base and the lower die, and the thickness of the base plate 9 is 70-90 mm. The base plate 9 is provided with a mandril 10 which is movably arranged, the base plate 10 is provided with a mandril mounting hole, the mandril 10 is of an inverted T-shaped structure, the mandril 10 is communicated with the second cavity of the lower die 5, the small diameter section of the mandril 10 is in sliding fit with the second cavity of the lower die 5, the large diameter section of the mandril 10 is matched with the mandril mounting hole of the base plate 9, the band pulley shaft to be processed can be ejected out through the mandril 10, and the total length of the band pulley shaft to be processed is also limited.

The utility model discloses a theory of operation: the upper die base and the lower die base are arranged on a punching machine, the punching machine drives the upper die base and the upper die 1 to be downwards matched with the lower die 5 of the lower die base, the upper die is positioned through the first positioning boss 6, the upper die 1 and the lower die 5 are closed to form a belt wheel shaft cavity for processing a belt wheel shaft, and the formed belt wheel shaft is ejected out of a second cavity of the lower die through the ejector rod 10. Adopting closed forging which is flash-free forging, wherein during forging, the forging is carried out in a closed space of an upper die and a lower die through three-dimensional force volume molding; the metal fiber of the forged product is completely conformal, and the internal structure and the mechanical property of the forged piece are improved.

Claims

1. The utility model provides a closed forging die of band pulley axle, includes upper die base and die holder, its characterized in that: the upper die base is provided with an upper die, the upper die is provided with a first concave cavity of a pulley shaft to be processed, the lower die base is provided with a lower die, the lower die is provided with a second concave cavity of the pulley shaft to be processed, and when the lower die is closed, the first concave cavity of the upper die and the second concave cavity of the lower die form a pulley shaft cavity; a base plate is arranged between the upper die base and the lower die, a top rod is movably arranged on the base plate, the top rod is communicated with the second cavity of the lower die, and a first positioning boss matched with the first cavity of the upper die is further arranged on the lower die.

2. Closed forging die for pulley shafts according to claim 1, characterized in that: the upper die is sleeved with an upper die sleeve, and the lower die is sleeved with a lower die sleeve.

3. Closed forging die for pulley shafts according to claim 2, characterized in that: the upper die and the upper die sleeve are provided with a second positioning boss which is matched with each other, and the lower die sleeve are provided with a third positioning boss which is matched with each other.

4. Closed forging die for wheeled shafts according to claim 2 or 3, characterized in that: the upper die sleeve is provided with a second hoisting hole, and the lower die sleeve is provided with a third hoisting hole.

5. Closed forging die for pulley shafts according to claim 1, characterized in that: the thickness of the cushion plate is 70-90 mm.

6. Closed forging die for wheeled shafts as claimed in claim 1 or 5, characterized in that: the base plate is provided with an ejector rod mounting hole, the ejector rod is of an inverted T-shaped structure, the small-diameter section of the ejector rod is in sliding fit with the second concave cavity of the lower die, and the large-diameter section of the ejector rod is matched with the ejector rod mounting hole of the base plate.

7. Closed forging die for pulley shafts according to claim 1, characterized in that: the lateral wall of lower mould still is equipped with first hole for hoist.