CN214867256U

CN214867256U - Forming die of powder metallurgy gear

Info

Publication number: CN214867256U
Application number: CN202120889372.XU
Authority: CN
Inventors: 蓝楷; 李宁
Original assignee: Shijiazhuang Jingshi New Material Technology Co ltd
Current assignee: Shijiazhuang Jingshi New Material Technology Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-11-26
Anticipated expiration: 2031-04-28

Abstract

The utility model discloses a forming die of powder metallurgy gear belongs to powder metallurgy technical field, including shaping bed die and supporting shaping subassembly, the shaping subassembly includes the shaping upper punch, next dashes, down two dashes and shaping plug, its characterized in that: a groove is arranged in the through hole of the forming female die; the peripheral surface of the upper end part of the next punch is provided with a lower punch bulge matched with the groove; the upper end part of the lower second punch is positioned in a hole of the lower second punch and is matched with the end surface of the lower second punch and the forming core rod to form an annular cavity of the gear shaft platform; the lower end part of the forming upper punch is provided with an upper punch bulge matched with the groove and a through hole matched with the forming core rod. The die of the utility model can realize the tooth powder molding and simultaneously process the structure of lightening holes, pillow blocks and the like so as to reduce the number of the die and the cost of matching; the number of the die parts is small, the die is convenient to install and debug, the dimensional stability and precision of a product can be fully guaranteed, and the utilization rate of materials is improved.

Description

Forming die of powder metallurgy gear

Technical Field

The utility model belongs to the technical field of powder metallurgy, concretely relates to forming die of powder metallurgy gear.

Background

Powder metallurgy is a process technology for preparing metal powder or using metal powder (or a mixture of metal powder and nonmetal powder) as a raw material to prepare metal materials, composite materials and various products through forming and sintering, has the advantages of energy and material saving, excellent performance, high product precision, good quality stability and high and low emission, and is widely applied to the fields of mechanical manufacturing, aerospace and the like. Parts such as gears, motorcycle isolators and the like are manufactured in batches by powder metallurgy technology.

In the prior art, at least the following technical problems exist: the gear manufactured by the powder metallurgy technology is only provided with a gear body, and the gear weight reduction measures such as a pillow block, a weight reduction hole and the like need to be realized by post processing, so that the working procedure and labor cost are increased.

Disclosure of Invention

The to-be-solved problem of the utility model is to provide a forming die of powder metallurgy gear, at the fashioned in-process synchronous shaping pillow block of gear and lightening hole, remove the manufacturing procedure in later stage from.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a forming die of powder metallurgy gear, includes shaping bed die and supporting shaping subassembly, the shaping subassembly is including shaping upper punch, next towards, down two towards and shaping plug, its characterized in that: a groove for forming gear teeth is formed in the through hole of the forming female die; the peripheral surface of the upper end part of the next punch is provided with a lower punch bulge matched with the groove; the upper end part of the lower second punch is positioned in the hole of the lower second punch and is matched with the end surface of the lower second punch and the forming core rod to form an annular cavity of the gear shaft platform; and the lower end part of the forming upper punch is provided with an upper punch bulge matched with the groove and a through hole matched with the forming core rod.

Furthermore, a plurality of upright columns used for forming the gear lightening holes are arranged on the end face of the next punch, and positioning holes matched with the upright columns are arranged at the lower end part of the forming upper punch.

Further, the upright post comprises a cylindrical part and a conical part which is connected with the next punch and expands outwards, and the conical angle of the conical part is 7-9 degrees.

Further, the length ratio of the cylindrical part to the conical part is 1.3-1.6: 1.

furthermore, the unilateral clearance between the cylindrical part and the positioning hole is 0.02-0.025 mm.

Furthermore, the unilateral clearance between the forming core rod and the through hole is 0.02-0.025 mm.

Further, the unilateral assembly gap between the next punch and the forming female die is 0.01-0.015 mm.

The utility model has the advantages that: by designing the part structure of the die, the structures such as lightening holes, pillow blocks and the like are processed while the gear powder is molded, so that the number of the die and the later processing cost are reduced; the number of the die parts is small, so that the die is convenient to install and debug, the dimensional stability and precision of a product can be fully ensured, production links are reduced, and the utilization rate of materials is improved; the whole component is simple in structure, convenient to operate and high in production efficiency.

The present invention will be described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a gear molded by using the mold of the present invention;

fig. 2 is a schematic view of the overall structure of the mold of the present invention;

fig. 3 is a schematic structural view of a next punch in the die of the present invention;

fig. 4 is a schematic structural view of the upper punch in the die of the present invention.

In the drawings: 1. the forming die comprises a forming female die, 1-1 parts of grooves, 2 parts of forming upper punches, 2-1 parts of upper punch protrusions, 2-2 parts of through holes, 2-3 parts of positioning holes, 3 parts of next punches, 3-1 parts of lower punch protrusions, 3-2 parts of cylindrical parts, 3-3 parts of conical parts, 4 parts of lower second punches, 5 parts of forming core rods.

Detailed Description

Referring to fig. 2, the utility model provides a forming die for a gear in powder metallurgy forming technology, which comprises a forming female die 1 and a matched forming assembly. The forming assembly comprises a forming upper punch 2, a next punch 3, a next punch 4 and a forming core rod 5. The forming assembly and the forming female die 1 are matched with each other to manufacture the gear shown in figure 1, so that the formed gear has lightening holes and a pillow block.

Referring to fig. 2 to 4, the female forming die 1 is provided with a groove 1-1 for forming gear teeth in the inner circumferential direction of the through hole. The peripheral surface of the upper end part of the next punch 3 is provided with a lower punch bulge 3-1 matched with the groove 1-1. In order to ensure the forming precision, the unilateral assembly gap between the next punch 3 and the forming female die 1 is 0.01-0.015 mm. The lower end part of the forming upper punch 2 is provided with an upper punch bulge 2-1 matched with the groove 1-1. The through hole in the forming female die 1, the groove 1-1 in the through hole, the upper end surface of the next punch 3, the lower punch protrusion 3-1, the lower end surface of the forming upper punch 2 and the upper punch protrusion 2-1 are matched to form a cavity of the gear body.

In order to form a pillow block and a shaft hole, the upper end part of the lower secondary punch 4 is positioned in the hole of the lower secondary punch 3 and is matched with the end surface of the lower secondary punch 3 and the forming core rod 5 to form an annular cavity of the gear pillow block, the shaft hole and the cavity of the gear body. The lower end part of the forming upper punch 2 is provided with a through hole 2-2 matched with the forming core rod 5. The unilateral clearance between the forming core rod 5 and the through hole 2-2 is 0.02-0.025mm to ensure the precision after forming.

In order to form lightening holes, a plurality of upright posts for forming the lightening holes of the gear are arranged on the end surface of the next punch 3, and positioning holes 2-3 matched with the upright posts are arranged at the lower end part of the forming upper punch 2. The upright column comprises a cylindrical part 3-2 and a conical part 3-3 which is connected with the next punch 3 and expands outwards, and the conical angle of the conical part 3-3 is 7-9 degrees. The length ratio of the cylindrical portion 3-2 to the tapered portion 3-3 is 1.3-1.6: 1. the unilateral clearance between the cylindrical part 3-2 and the positioning hole 2-3 is 0.02-0.025 mm.

The utility model discloses a mould is when specifically using, and the part in the device sets up lift drive according to the demand. Firstly, a forming female die 1, a next punch 3 and a next punch 4 are matched with each other to form a cavity, then powder is added into the cavity, then a forming core rod 5 is lifted, a forming punch 2 is lowered, and the gear is obtained through opposite punching. In the demolding, the upper forming punch 2 is raised, the forming core rod 5 and the forming female die 1 are lowered, and the workpiece is taken out.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. The utility model provides a forming die of powder metallurgy gear, includes shaping bed die (1) and supporting forming assembly, forming assembly is including shaping upper punch (2), next (3), lower two towards (4) and shaping plug (5), its characterized in that:

a groove (1-1) for forming gear teeth is arranged in the through hole of the forming female die (1);

the peripheral surface of the upper end part of the next punch (3) is provided with a lower punch bulge (3-1) matched with the groove (1-1);

the upper end part of the lower punch (4) is positioned in the hole of the lower punch (3) and is matched with the end surface of the lower punch (3) and the forming core rod (5) to form an annular cavity of the gear shaft table;

the lower end part of the forming upper punch (2) is provided with an upper punch bulge (2-1) matched with the groove (1-1) and a through hole (2-2) matched with the forming core rod (5).

2. The forming die for a powder metallurgy gear according to claim 1, wherein: the end face of the next punch (3) is provided with a plurality of upright posts for forming a gear lightening hole, and the lower end part of the forming punch (2) is provided with positioning holes (2-3) matched with the upright posts.

3. The forming die for a powder metallurgy gear according to claim 2, wherein: the upright column comprises a cylindrical part (3-2) and a conical part (3-3) which is connected with the next punch (3) and expands outwards, and the conical angle of the conical part (3-3) is 7-9 degrees.

4. The forming die for a powder metallurgy gear according to claim 3, wherein: the length ratio of the cylindrical part (3-2) to the conical part (3-3) is 1.3-1.6: 1.

5. the forming die for a powder metallurgy gear according to claim 3, wherein: the unilateral clearance between the cylindrical part (3-2) and the positioning hole (2-3) is 0.02-0.025 mm.

6. The forming die for a powder metallurgy gear according to any one of claims 1 to 5, wherein: the unilateral clearance between the forming core rod (5) and the through hole (2-2) is 0.02-0.025 mm.

7. The forming die for a powder metallurgy gear according to any one of claims 1 to 5, wherein: and the unilateral assembly gap between the next punch (3) and the forming female die (1) is 0.01-0.015 mm.