CN215033598U

CN215033598U - Powder metallurgy die of slotted pan head screw

Info

Publication number: CN215033598U
Application number: CN202121533294.6U
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: 2021-07-07
Filing date: 2021-07-07
Publication date: 2021-12-07
Anticipated expiration: 2031-07-07

Abstract

The utility model discloses a powder metallurgy die of a word groove pan head screw belongs to powder metallurgy technical field, including bed die and drift mould subassembly, its characterized in that: the punch die assembly comprises an upper punch assembly and a lower punch assembly, the upper punch assembly comprises an upper punch which is matched with the powder filling cavity of the female die to form the head of the straight-line groove screw, and the lower punch assembly comprises a lower punch of which the top is positioned in the powder filling cavity and a lower second punch which is sleeved in the lower punch and is used for forming the cavity of the stud part of the screw. The utility model discloses traditional screw manufacturing process before comparing adopts this mould stamping forming can reduce production link, save material, manual work, and then reduce cost, and this mould can show and reduce the machining volume, is showing and is improving production efficiency.

Description

Powder metallurgy die of slotted pan head screw

Technical Field

The utility model belongs to the technical field of powder metallurgy, the mould that adopts when concretely relates to through powder metallurgy technique shaping pan head screw.

Background

The mold is a variety of molds and tools used for molding the required products by injection molding, blow molding, extrusion, die casting or forging, smelting, stamping, stretching and other methods in industrial production. Powder metallurgy is an industrial technology for preparing metal powder or metal powder (or a mixture of metal powder and nonmetal powder) as a raw material, and then forming and sintering the raw material to prepare metal materials, composite materials and various products. The powder metallurgy technology has a series of advantages of remarkable energy saving, material saving, excellent performance, high product precision, good stability and the like, and is very suitable for mass production. When the powder metallurgy technology is adopted to form products, the design of a die is very important.

The screw and the nut are matched for use, so that the assembly limit of the screw can be reduced, the tightness can be adjusted, the axial movement of the screw is overcome, and the assembly and the disassembly of equipment are facilitated. The precision of the screw directly influences the radial runout of the nut, and for some equipment, because of complex structure and high geometric tolerance requirements, the traditional machining method cannot be adopted, and a casting or forging method is adopted, so that the precision and the dimensional stability are poor on one hand, and on the other hand, the process is complicated, time-consuming and material-consuming.

Disclosure of Invention

The to-be-solved problem of the utility model is to provide a powder metallurgy die of a word groove pan head screw, adopt two upper punches, two lower punches and bed die cooperation to use, shaping screw appearance and a word recess reduce the production link simultaneously, improve machining efficiency and precision.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a powder metallurgy die of a word groove pan head screw, includes bed die and drift mould subassembly, its characterized in that: the punch die assembly comprises an upper punch assembly and a lower punch assembly, the upper punch assembly comprises an upper punch which is matched with the powder filling cavity of the female die to form the head of the straight-line groove screw, and the lower punch assembly comprises a lower punch of which the top is positioned in the powder filling cavity and a lower second punch which is sleeved in the lower punch and is used for forming the cavity of the stud part of the screw.

Furthermore, a hole for forming a chamfer of the screw stud portion is formed at the top end portion of the lower second punch.

Furthermore, the chamfer angle of the bolt part of the screw is 40 DEG

Further, an arc-shaped bulge for forming a straight groove is arranged at the lower end part of the upper punch.

Further, the single-side assembly gap between the upper punch and the female die is 0.015-0.025 mm.

Further, the single-side assembly gap between the next punch and the female die is 0.015-0.025 mm.

Furthermore, two powder filling cavities are arranged in the female die, and each powder filling cavity is matched with one group of punch die assemblies.

Further, the female die is made of WC.

Furthermore, the material of the upper punch, the lower punch and the lower punch is DC 53.

The utility model has the advantages that: (1) compared with the traditional screw manufacturing process, the die can reduce production links, save materials and labor by adopting punch forming, so that the cost is reduced, the die can obviously reduce machining amount, and the production efficiency is obviously improved; (2) the slotted pan head screw produced by the die has the advantages of good size, surface precision and stability, uniform density and stable quality; (3) the die is simple in structure, quick and convenient to install and quick to debug.

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

Drawings

FIG. 1 is a schematic structural view of a powder metallurgy die according to the present invention;

fig. 2 is a schematic structural diagram of a screw manufactured by adopting the utility model powder metallurgy die.

In the attached drawing, 1 part of a female die, 1-1 part of a powder filling cavity, 2 part of a first punch, 2-1 part of an arc-shaped bulge, 3 part of a second punch, 4-1 part of a hole, A represents a straight groove, B represents a head part, and C represents a stud part.

Detailed Description

Referring to fig. 1, the present invention provides a powder metallurgy die for a slotted pan head screw, which comprises a female die 1 and a punch die assembly, and is used for manufacturing the screw shown in fig. 2. The screw comprises a head part B and a stud part C, and a straight groove A is formed in the head part B. It should be noted that the screw bolt part C in the screw manufactured by the powder metallurgy die of the present invention has no screw thread and needs to be realized by post machining.

The punch die assembly described above includes an upper punch assembly and a lower punch assembly.

The upper punch assembly comprises an upper punch 2 which cooperates with the powder-filled cavity 1-1 of the female die 1 to form the head of the slotted screw. The unilateral assembly gap between the upper punch 2 and the female die 1 is 0.015-0.025 mm. The lower end part of the upper punch 2 is provided with an arc-shaped bulge 2-1 for forming a straight groove.

The lower punch assembly comprises a next punch 3 with the top positioned in the powder filling cavity 1-1 and a second lower punch 4 sleeved in the next punch 3 and used for forming a screw stud part cavity. The single-side assembly gap between the next punch 3 and the female die 1 is 0.015-0.025 mm. The single-side assembly gap between the lower second punch 4 and the lower first punch 3 is 0.01-0.015 mm. The top end of the lower punch 4 is provided with a tapered hole 4-1 for forming a screw stud chamfer (chamfer angle of 40 °).

In order to realize quick and efficient manufacturing, two powder filling cavities 1-1 are arranged in the female die 1, and each powder filling cavity 1-1 is matched with a group of punch die assemblies. The screws can be made separately in the two powder-filled cavities 1-1 and are not affected by each other.

In the above parts, the material of the female die 1 is WC, and the materials of the first punch 2, the second punch 3 and the second punch 4 are all DC 53. When the die is used specifically, the female die 1, the upper punch 2, the lower punch 3 and the lower punch 4 are all provided with a driving device for driving the female die to lift.

The female die 1, the upper punch 2, the lower punch 3 and the lower punch 4 are all provided with driving devices for driving the female die to lift.

The utility model discloses a concrete working process of mould as follows:

under the drive of a corresponding drive device, the female die 1, the next punch 3 and the lower second punch 4 respectively move upwards to designated positions, then metal powder is added into the powder filling cavity 1-1, then the previous punch 2 moves downwards to be matched with the next punch 3 and the lower second punch 4 to press screws, and after the pressing is finished, demolding is started.

The product demoulding sequence is as follows: and resetting the upper punch 2, moving the female die 1 and the lower punch 3 downwards, and removing the screw from the die cavity to finish demoulding.

After demolding is finished, the finished screw is obtained through the working procedures of sintering, deburring, machining and the like.

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 powder metallurgy die of a word groove pan head screw, includes bed die (1) and drift mould subassembly, its characterized in that: the punch die assembly comprises an upper punch assembly and a lower punch assembly, the upper punch assembly comprises an upper punch (2) which is matched with a powder filling cavity (1-1) of a female die (1) to form the head of the slotted screw, and the lower punch assembly comprises a lower punch (3) the top of which is positioned in the powder filling cavity (1-1) and a lower second punch (4) which is sleeved in the lower punch (3) and is used for forming the cavity of the screw stud part.

2. The powder metallurgy die for a pan head screw according to claim 1, wherein: the top end part of the lower second punch (4) is provided with a hole (4-1) for forming a chamfer of the screw column part.

3. The powder metallurgy die for a pan head screw according to claim 2, wherein: the chamfer angle of the screw stud part is 40 degrees.

4. The powder metallurgy die for a pan head screw according to claim 1, wherein: the lower end part of the upper punch (2) is provided with an arc-shaped bulge (2-1) for forming a straight groove.

5. The powder metallurgy die for a pan head screw according to claim 1, wherein: the unilateral assembly gap between the upper punch (2) and the female die (1) is 0.015-0.025 mm.

6. The powder metallurgy die for a pan head screw according to claim 1, wherein: the unilateral assembly gap between the next punch (3) and the female die (1) is 0.015-0.025 mm.

7. The powder metallurgy die for a slotted pan head screw according to any one of claims 1 to 6, wherein: two powder filling cavities (1-1) are arranged in the female die (1), and a group of punch die assemblies are arranged in each powder filling cavity (1-1) in a matched manner.

8. The powder metallurgy die for a slotted pan head screw according to any one of claims 1 to 6, wherein: the female die (1) is made of WC.

9. The powder metallurgy die for a slotted pan head screw according to any one of claims 1 to 6, wherein: the material of the upper punch (2), the lower punch (3) and the lower punch (4) is DC 53.