Powder metallurgy die with spring relief

Abstract

This utility model provides a powder metallurgy mold with pressure relief, including a mold body. The mold body includes a pressing outer lower mold, which is connected to an outer lower mold pad via an outer lower mold pressure ring. The outer lower mold pressure ring and the outer lower mold pad are connected by screws. The outer lower mold pressure ring includes a first pressure ring and a second pressure ring. The outer lower mold pad includes a first pad, a second pad, and a third pad. The upper part of the first pressure ring is connected to the pressing outer lower mold, and the lower part of the first pressure ring is connected to the first pad via screws. The lower part of the first pad is connected to the second pad, and the outer side of the second pad is provided with a second pressure ring. The inner side of the second pressure ring is fitted with the outer side of the second pad. The lower part of the second pressure ring is connected to the upper end of the third pad via screws, and the upper end of the third pad is also fitted with the bottom of the second pad. In this utility model, the first pad and the second pad are connected vertically by screws, and the second pressure ring and the third pad are fixed by screws.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical fixtures, specifically to powder metallurgy molds with force relief. Background Technology

[0002] Powder metallurgy products are formed by die casting using metal powders (or mixtures of metal and non-metal powders) as raw materials and molds. At the initial stage of new product development, the specific characteristics of the product need to be considered to determine the press model, and then the corresponding forming mold and related drawings for the mating blocks need to be designed. A common assembly method for mating blocks is as follows: Figure 1 The spacers are connected layer by layer with screws. This assembly method is simple, straightforward, and structurally sound, suitable for assembling spacers in most products. However, this assembly method also has certain limitations for some products. Utility Model Content

[0003] In view of the problems existing in the prior art, this utility model provides a powder metallurgy mold with force relief to solve at least one of the above-mentioned technical problems.

[0004] The technical solution of this utility model is: a powder metallurgy mold with force relief, comprising a mold body, characterized in that the mold body includes a pressing outer lower mold, the pressing outer lower mold is connected to an outer lower mold pad block through an outer lower mold pressure ring, the outer lower mold pressure ring and the outer lower mold pad block are connected by screws, the outer lower mold pressure ring includes a first pressure ring and a second pressure ring, and the outer lower mold pad block includes a first pad block, a second pad block and a third pad block;

[0005] The upper part of the first pressure ring is connected to the outer lower die of the pressing, the lower part of the first pressure ring is connected to the first pad by a screw, the lower part of the first pad is connected to the second pad, the outer side of the second pad is provided with a second pressure ring, the inner side of the second pressure ring is in contact with the outer side of the second pad, the lower part of the second pressure ring is connected to the upper end of the third pad by a screw, and the upper end of the third pad is also in contact with the bottom of the second pad.

[0006] This invention uses a first and second pad connected vertically by screws, and a second pressure ring and a third pad fixed together by screws. When the product is pressed and the outer lower die is subjected to pressure, generating lateral stress, the stress is transmitted through the first pad to the second pad. At this time, the second pad is not completely fixed; when subjected to greater lateral stress, the second pad can rotate slightly relative to the product, thus helping to release some of the lateral stress generated during the production of the outer lower die. Compared with ordinary pad combinations, the optimized pad combination can help the hollow forming die release stress, extend die life, and improve production efficiency without affecting normal product production. The outer lower die is designed as a relatively hollow structure. When the product is pressed, if a traditional pad combination is used, the pressure is transmitted from top to bottom and acts on the outer lower die, easily forming a lateral internal stress. The lower pad can only share the axial pressure. When the pressing pressure is large or the number of pressing cycles is high, the bottom of the outer lower die will crack due to the lateral stress, affecting the die life and production cycle.

[0007] More preferably, the upper surface of the second pad is provided with an annular baffle, and the lower end of the first pad is provided with a notch that fits with the annular baffle.

[0008] This allows for better engagement between the first and second pads, preventing them from easily falling off.

[0009] Further preferably, the lower end of the second pad has circumferentially arranged annular protrusions, which face the connection between the second pressure ring and the third pad.

[0010] The second pad is fixed by connecting the second pressure ring and the third pad with screws. When subjected to greater pressure, the second pad can rotate slightly.

[0011] More preferably, the first pressure ring is disposed on the outside of the pressing outer lower die, and the lower end of the pressing outer lower die is located at the connection between the first pressure ring and the first pad.

[0012] It can better distribute stress.

[0013] Preferably, the outer surface of the third pad is flush with the outer surface of the second pressure ring.

[0014] The structural layout has been optimized for easier installation and positioning. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the existing technology structure;

[0016] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0017] In the diagram: 1 is the outer lower die; 2 is the first pressure ring; 3 is the first pad; 4 is the second pad; 5 is the second pressure ring; 6 is the third pad. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Reference Figure 2 As shown, a powder metallurgy mold with force relief includes a mold body, which includes a pressing outer lower mold 1. The pressing outer lower mold is connected to an outer lower mold pad block via an outer lower mold pressure ring. The outer lower mold pressure ring and the outer lower mold pad block are connected by screws. The outer lower mold pressure ring includes a first pressure ring 2 and a second pressure ring 5. The outer lower mold pad block includes a first pad block 3, a second pad block 4, and a third pad block 6. The upper part of the first pressure ring is connected to the pressing outer lower mold, and the lower part of the first pressure ring is connected to the first pad block via screws. The lower part of the first pad block is connected to the second pad block. The outer side of the second pad block is provided with a second pressure ring, and the inner side of the second pressure ring is in contact with the outer side of the second pad block. The lower part of the second pressure ring is connected to the upper end of the third pad block via screws, and the upper end of the third pad block is also in contact with the bottom of the second pad block.

[0020] This invention uses a first and second pad connected vertically by screws, and a second pressure ring and a third pad fixed together by screws. When the product is pressed and the outer lower die is subjected to pressure, generating lateral stress, the stress is transmitted through the first pad to the second pad. At this time, the second pad is not completely fixed; when subjected to greater lateral stress, the second pad can rotate slightly relative to the product, thus helping to release some of the lateral stress generated during the production of the outer lower die. Compared with ordinary pad combinations, the optimized pad combination can help the hollow forming die release stress, extend die life, and improve production efficiency without affecting normal product production. The outer lower die is designed as a relatively hollow structure. When the product is pressed, if a traditional pad combination is used, the pressure is transmitted from top to bottom and acts on the outer lower die, easily forming a lateral internal stress. The lower pad can only share the axial pressure. When the pressing pressure is large or the number of pressing cycles is high, the bottom of the outer lower die will crack due to the lateral stress, affecting the die life and production cycle.

[0021] Further preferably, the upper surface of the second pad is provided with an annular baffle, and the lower end of the first pad is provided with a notch that fits into the annular baffle. This allows for better engagement of the first and second pads, preventing them from easily falling off.

[0022] Further preferably, the lower end of the second pad has circumferentially arranged annular protrusions facing the connection between the second pressure ring and the third pad. The second pad is fixed by screws connecting the second pressure ring and the third pad, and can rotate slightly when subjected to greater pressure.

[0023] Further preferably, the first pressure ring is positioned outside the pressing lower die, and the lower end of the pressing lower die is located at the connection between the first pressure ring and the first pad. This allows for better pressure distribution.

[0024] Further optimization involves flushing the outer surface of the third pad with the outer surface of the second pressure ring. This optimizes the structural layout and facilitates installation and positioning.

[0025] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A powder metallurgy die with a relief, comprising a die body, characterized in that, The mold body includes a pressing outer lower mold, which is connected to an outer lower mold pad through an outer lower mold pressing ring. The outer lower mold pressing ring and the outer lower mold pad are connected by screws. The outer lower mold pressing ring includes a first pressing ring and a second pressing ring. The outer lower mold pad includes a first pad, a second pad, and a third pad. The upper part of the first pressure ring is connected to the outer lower die of the pressing, the lower part of the first pressure ring is connected to the first pad by a screw, the lower part of the first pad is connected to the second pad, the outer side of the second pad is provided with a second pressure ring, the inner side of the second pressure ring is in contact with the outer side of the second pad, the lower part of the second pressure ring is connected to the upper end of the third pad by a screw, and the upper end of the third pad is also in contact with the bottom of the second pad.

2. The powder metallurgy die with a spring according to claim 1, wherein The upper surface of the second pad is provided with an annular baffle, and the lower end of the first pad is provided with a notch that fits with the annular baffle.

3. The powder metallurgy die with a spring according to claim 2, wherein The lower end of the second pad has circumferentially arranged annular protrusions, which face the connection between the second pressure ring and the third pad.

4. The powder metallurgy die with a spring according to claim 1, wherein The first pressure ring is disposed on the outside of the pressing lower die, and the lower end of the pressing lower die is located at the connection between the first pressure ring and the first pad.

5. The powder metallurgy die with a spring force of claim 1, wherein, The outer surface of the third pad is flush with the outer surface of the second pressure ring.

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