CN218855615U

CN218855615U - Prepressing forming die on thin-wall gear ring

Info

Publication number: CN218855615U
Application number: CN202223283701.XU
Authority: CN
Inventors: 曹玉海; 曹勇; 丁伟; 郭益山; 黄雁宇; 周广祥
Original assignee: Yangzhou Haichang New Material Co ltd
Current assignee: Yangzhou Haichang New Material Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-04-14
Anticipated expiration: 2032-12-08

Abstract

The utility model discloses a pre-compaction forming die on thin wall ring gear. The prepressing forming die on the thin-wall gear ring comprises a middle die fixedly connected with a machine tool, wherein a cavity for forming the outer side wall of a green blank is formed in the middle die, a lower punch for forming the bottom surface of the green blank is inserted into the lower part of the cavity, a core rod for forming the inner side wall of the green blank is inserted into an inner cavity of the lower punch, an upper punch for forming the top surface of the green blank is inserted into the upper part of the cavity, the upper punch is connected with the machine tool through a prepressing mechanism, the prepressing mechanism comprises a first seat fixedly connected with the machine tool, a second seat for installing the upper punch is arranged below the first seat, the second seat is in sliding connection with the first seat, a gap is reserved between the top surface of the second seat and the bottom surface of the first seat, and a plurality of elastic bodies are arranged between the top surface of the second seat and the top surface of the first seat. The utility model provides a prior art powder fill inhomogeneous, influence the problem of product shaping quality.

Description

Prepressing forming die on thin-wall gear ring

Technical Field

The utility model relates to a powder metallurgy technical field, in particular to pre-compaction forming die on thin wall ring gear.

Background

Because the middle die cavity for forming the thin-wall gear ring is small, when powder is fed into the hollow middle die cavity, gas in the middle die cavity cannot be discharged in time, eddy current can be formed in the middle die cavity, part of powder is dispersed, the powder in the middle die cavity is filled unevenly, local density is different, product quality is affected, and when the density difference reaches a certain degree, layered cracks can be formed after green blank forming, so that products are directly scrapped.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an improve the powder and fill the homogeneity, guarantee prepressing forming die on product forming quality's thin wall ring gear in order to provide one kind.

In order to achieve the above object, the utility model discloses a technical scheme that pre-compaction forming die adopted on the thin wall ring gear is:

the utility model provides a pre-compaction forming die on thin wall ring gear, includes the well mould of lathe rigid coupling, and the well mould is seted up the die cavity that is used for shaping the raw embryo lateral wall, and the lower part of die cavity inserts has the undershoot that is used for shaping the raw embryo bottom surface, and the inner chamber that undershoots inserts has the plug that is used for shaping the raw embryo inside wall, and the upper portion of die cavity inserts has the upper punch that is used for shaping the raw embryo top surface, the upper punch is connected with the lathe through prepressing mechanism, and prepressing mechanism includes the first pedestal with the lathe rigid coupling, and the below of first pedestal is provided with the second pedestal that is used for installing the upper punch, and second pedestal and first pedestal sliding connection leave the clearance between the top surface of second pedestal and the bottom surface of first pedestal, are provided with a plurality of elastomers between the top surface of second pedestal and the top surface of first pedestal.

Preferably, the top surface of the second seat body is provided with a plurality of limiting bolts, the first seat body is provided with guide holes through which the limiting bolts penetrate, and the limiting bolts suspend the second seat body under the first seat body.

Preferably, the second seat body comprises an annular body fixedly connected with the limiting bolt, a bottom plate is fixedly connected to the bottom surface of the annular body, and a cover plate for fixing the upper punch is fixedly connected to the bottom surface of the bottom plate.

Preferably, the first seat body is provided with a pilot hole through which the elastic body passes.

Preferably, the elastic body is a spring.

Compared with the prior art, the utility model, have following advantage:

when the upper punch pushes down the powder material, the elastomer begins to shrink, residual gas in the cavity is discharged from the gap, the powder material in the high-density area in the cavity automatically moves to the low-density area, and the density of the powder material in each area of the cavity is adjusted to be consistent in the process of continuously pushing down the upper punch, so that the forming quality of the green blank is ensured.

Drawings

Fig. 1 is a sectional view of the thin-walled ring gear upper pre-pressing forming die of the present invention;

fig. 2 is an exploded view of the structure of the pre-pressing mechanism.

The die comprises a middle die 1, a die cavity 11, a lower punch 2, a core rod 3, an upper punch 4, a prepressing mechanism 5, a first seat body 51, a concave 511, a guide hole 512, a guide hole 513, a limit bolt 52, a second seat body 53, an annular 531, a bottom plate 532, a cover plate 533 and an elastic body 54.

Detailed Description

The present invention will be further clarified by the following description in conjunction with the accompanying drawings, which are to be understood as illustrative only and not as limiting the scope of the invention, and modifications of the various equivalent forms of the invention by those skilled in the art after reading the present invention are within the scope defined by the appended claims.

As shown in figure 1-2, the prepressing forming die on the thin-wall gear ring comprises a middle die 1 fixedly connected with a machine tool, wherein the middle die is provided with a cavity 11 for forming the outer side wall of a green blank, the lower part of the cavity is inserted with a lower punch 2 for forming the bottom surface of the green blank, the inner cavity of the lower punch is inserted with a core rod 3 for forming the inner side wall of the green blank, the upper part of the cavity is inserted with an upper punch 4 for forming the top surface of the green blank, the upper punch is connected with the machine tool through a prepressing mechanism 5, the prepressing mechanism comprises a first seat body 51 fixedly connected with the machine tool, the first seat body is provided with four depressions 511 which are arranged in a cross shape, the depressions are provided with guide holes 512, the guide holes are inserted with limit bolts 52, and the limit bolts are in threaded connection with a second seat body 53, spacing bolt suspends the second pedestal in midair under first pedestal, the clearance between the top surface of second pedestal and the bottom surface of first pedestal is 11mm, spacing bolt and guiding hole cooperation, it is first, play the guide effect when second pedestal moves each other, the second pedestal includes the ring body 531 with spacing bolt rigid coupling, the bottom surface rigid coupling bottom plate 532 of ring body, the bottom surface rigid coupling of bottom plate is used for fixed apron 533 of upper punch, arrange four elastomers 54 that are the cross and arrange between ring body top surface and the first pedestal top surface, the elastomer staggers with spacing bolt and arranges, the elastomer is the spring, first pedestal sets up the guide hole 513 that the elastomer passed, avoid the spring to drop from the ring body.

The utility model discloses a concrete working process and principle: the machine tool drives the first seat body to move downwards, the upper punch moves downwards along with the first seat body, when the upper punch abuts against powder, the spring begins to shrink, residual gas in the cavity is discharged from a gap of the die, the powder in a high-density area in the cavity automatically moves to a low-density area, after the spring is compressed by 11mm, the bottom surface of the first seat body abuts against the top surface of the annular body, namely the first seat body and the second seat body are combined, and the upper punch is driven to press downwards until a green blank is formed. The utility model discloses changed the connected mode of upper punch and lathe, changed original rigid connection into flexonics, through the prepressing mechanism at the pushing down in-process of upper punch, reach unanimous with each regional powder density adjustment of die cavity to guarantee the shaping quality of green body, the product of avoiding after the sintering is scrapped.

Claims

1. The utility model provides a pre-compaction forming die on thin wall ring gear, includes the well mould of lathe rigid coupling, and the die cavity that is used for shaping the green embryo lateral wall is seted up to well mould, and the lower part of die cavity is inserted and is had the undershoot that is used for shaping the green embryo bottom surface, and the inner chamber that undershoots inserts the plug that is used for shaping the green embryo inside wall, and the upper portion of die cavity is inserted and is had the upper punch that is used for shaping the green embryo top surface, its characterized in that: the upper punch is connected with a machine tool through a prepressing mechanism, the prepressing mechanism comprises a first seat body fixedly connected with the machine tool, a second seat body used for installing the upper punch is arranged below the first seat body, the second seat body is connected with the first seat body in a sliding mode, a gap is reserved between the top surface of the second seat body and the bottom surface of the first seat body, and a plurality of elastic bodies are arranged between the top surface of the second seat body and the top surface of the first seat body.

2. The thin-walled ring gear upper preload forming die of claim 1, wherein: the top surface of the second seat body is provided with a plurality of limiting bolts, the first seat body is provided with guide holes through which the limiting bolts penetrate, and the second seat body is suspended under the first seat body by the limiting bolts.

3. The thin-walled ring gear pre-press forming die of claim 2, characterized in that: the second seat body comprises an annular body fixedly connected with the limiting bolt, a bottom plate is fixedly connected to the bottom surface of the annular body, and a cover plate used for fixing the upper punch is fixedly connected to the bottom surface of the bottom plate.

4. The thin-walled ring gear upper preload forming die according to claim 2, wherein: the first seat body is provided with a pilot hole through which the elastic body passes.

5. The thin-walled ring gear upper preload forming die according to claim 4, wherein: the elastic body is a spring.