CN218798601U

CN218798601U - Driving end transmission wheel forming die

Info

Publication number: CN218798601U
Application number: CN202222954295.9U
Authority: CN
Inventors: 濮威
Original assignee: Changshu Hua De Powder Metallurgy Co ltd
Current assignee: Changshu Hua De Powder Metallurgy Co ltd
Priority date: 2022-11-07
Filing date: 2022-11-07
Publication date: 2023-04-07
Anticipated expiration: 2032-11-07

Abstract

The utility model discloses a drive end transfer wheel forming die, which comprises a forming middle die, a forming core rod, a first forming upper punch, a second forming upper punch and a forming lower punch, wherein the forming middle die comprises a step hole-shaped cavity, and the cavity consists of an upper straight section and a lower inner tooth section; the first upper forming punch is provided with a first placing cavity, the second upper forming punch is provided with a second placing cavity, the lower forming punch is provided with a third placing cavity, and the outer surface of the lower forming punch is provided with external teeth; the first upper forming punch and the lower forming punch are vertically distributed and arranged in a die cavity, a second upper forming punch is arranged in a first placing cavity of the first upper forming punch, a forming core rod is arranged in a third placing cavity of the lower forming punch, and the forming core rod is inserted into a second placing cavity of the second upper forming punch in the die cavity; the utility model discloses the mould improves product density through the cooperation of first shaping upper punch, second shaping upper punch and shaping undershoot, improves the homogeneity of density, and the product density of production is even, improves the quality of powder metallurgy product, does not have the edge that falls appearance defects such as angle.

Description

Driving end transmission wheel forming die

Technical Field

The utility model relates to a drive end transmission wheel forming die for the drive end transmission wheel is produced to powder metallurgy technology belongs to powder metallurgy technical field.

Background

The driving end transmission wheel is used as a transmission part in a transmission system of an automobile, as shown in fig. 1 and 2, the driving end transmission wheel produced by a powder metallurgy process is formed by integrally die-casting a gear 1 and a bottom plate 2 on the end face of the gear 1, the gear produced by the conventional powder metallurgy process is mature, but the bottom plate 2 designed at the end part of the gear 1 brings certain difficulty to the powder metallurgy production, particularly, edges and corners of the contact part of the tooth form at the end part of the gear 1 and the bottom plate 2 are easy to fall off, the density is uneven, and serious quality defects are brought to products.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a drive end transmission wheel forming die, the powder metallurgy product drive end transmission wheel density of production is even, does not have the limit defect of falling the angle.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the driving end transfer wheel forming die comprises a forming middle die, a forming core rod, a first forming upper punch, a second forming upper punch and a forming lower punch, wherein the forming middle die comprises a stepped hole-shaped die cavity, and the die cavity consists of an upper straight section and a lower inner tooth section; the first upper forming punch is provided with a first placing cavity, the second upper forming punch is provided with a second placing cavity, the lower forming punch is provided with a third placing cavity, and the outer surface of the lower forming punch is provided with external teeth; the first upper forming punch and the lower forming punch are vertically distributed and installed in a die cavity, a second upper forming punch is installed in a first placing cavity of the first upper forming punch, a forming core rod is installed in a third placing cavity of the lower forming punch, and the forming core rod is inserted into a second placing cavity of the second upper forming punch in the die cavity.

In order to form a stepped hole inside the drive end transfer wheel, the first forming punch is stepped in profile.

Preferably, the annular end face of the first forming upper punch is groove-shaped, and the middle of the die-casting end face of the second forming upper punch is higher than the edge.

The utility model discloses the mould improves product density through the cooperation of first shaping upper punch, second shaping upper punch and shaping undershoot, improves the homogeneity of density, and the product density of production is even, improves the quality of powder metallurgy product, does not have the edge that falls appearance defects such as angle.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a plan view of a drive-end transmission wheel.

Fig. 2 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A in fig. 1.

Fig. 3 is a schematic view of a mold in forming.

Fig. 4 is a schematic view of a forming mandrel.

Fig. 5 is a schematic view of a first forming punch.

Fig. 6 is a schematic view of a second forming punch.

FIG. 7 is a schematic view of a forming undershoot.

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

Detailed Description

As shown in fig. 3 to 8, the driving end transfer wheel forming die comprises a middle forming die 3, a forming core rod 4, a first upper forming punch 5, a second upper forming punch 6 and a lower forming punch 7, wherein as shown in fig. 3, the middle forming die 3 comprises a stepped hole-shaped cavity 8, and the cavity 8 is formed by an upper flat straight section and a lower inner tooth section 9. As shown in fig. 5, the first upper forming punch 5 has a stepped shape, the first upper forming punch 5 has a first placing cavity 10, and the annular end surface of the first upper forming punch 5 has a groove shape. As shown in fig. 6, the second upper forming punch 6 has a second placing cavity 11, and the die-cast end face of the second upper forming punch 6 is higher in the middle than in the edge. As shown in fig. 7, the lower die 7 has a third placing cavity, and its outer surface has external teeth 12.

As shown in fig. 8, the first upper forming punch 5 and the lower forming punch 7 are arranged in a die cavity 8 in an up-and-down distributed manner, the second upper forming punch 6 is arranged in a first placing cavity 10 of the first upper forming punch 5, the forming core rod 4 is arranged in a third placing cavity of the lower forming punch 7, and the forming core rod 4 is inserted in a second placing cavity 11 of the second upper forming punch 6 in the die cavity 8.

When the device is used, metal powder is added between the first forming upper punch 5 and the forming lower punch 7 in the stepped hole-shaped cavity 8 of the forming middle die 3, the first forming upper punch 5, the second forming upper punch 6 and the forming lower punch 7 move relatively to match with the forming core rod 4, the driving end transmission wheel shown in figures 1 and 2 is integrally pressed and formed, the contact position between the tooth form of the end part of the gear 1 of the driving end transmission wheel and the bottom plate 2 is high in density and uniform, appearance defects such as edge drop and corner drop are avoided, and the quality of powder metallurgy products is improved.

The above-mentioned embodiment does not limit the utility model in any way, and all the technical solutions that adopt the mode of equivalent replacement or equivalent transform to obtain all fall within the protection scope of the utility model.

Claims

1. The forming die for the driving end transfer wheel is characterized by comprising a forming middle die, a forming core rod, a first forming upper punch, a second forming upper punch and a forming lower punch, wherein the forming middle die comprises a stepped hole-shaped cavity which consists of an upper straight section and a lower inner tooth section; the first upper forming punch is provided with a first placing cavity, the second upper forming punch is provided with a second placing cavity, the lower forming punch is provided with a third placing cavity, and the outer surface of the lower forming punch is provided with external teeth; the first upper forming punch and the lower forming punch are vertically distributed and installed in a die cavity, a second upper forming punch is installed in a first placing cavity of the first upper forming punch, a forming core rod is installed in a third placing cavity of the lower forming punch, and the forming core rod is inserted into a second placing cavity of the second upper forming punch in the die cavity.

2. The drive-end transfer wheel forming die of claim 1, wherein: the first forming punch has a stepped profile.

3. The drive-end transfer wheel forming die of claim 1, wherein: the annular end face of the first forming punch is grooved.

4. The drive-end transfer wheel forming die according to claim 1, wherein: the middle of the die-casting end face of the second forming upper punch is higher than the edge.