阅读说明：本技术 整体式烧结粉末冶金刹车片的烧结方法 (Sintering method of integral sintered powder metallurgy brake pad ) 是由 张明俊 何先慧 于 2019-08-02 设计创作，主要内容包括：本发明公开了整体式烧结粉末冶金刹车片的烧结方法,该方法在骨架中部环形结构及凸爪上、下表面均放置粉末冶金刹车片,然后用夹持工具将骨架上、下表面完全覆盖,最后将骨架、夹持工具放入炉内进行高温烧结,烧结后将凸爪上、下表面的粉末冶金刹车片取下即可进行后续工序。解决了将1Cr18Ni9Ti等不锈钢材料作为骨架,在其上烧结刹车片的时候,未覆盖有粉末冶金刹车片的部分骨架变形问题。(The invention discloses a sintering method of an integral sintered powder metallurgy brake pad, which comprises the steps of placing the powder metallurgy brake pad on an annular structure in the middle of a framework and the upper surface and the lower surface of a convex claw, then completely covering the upper surface and the lower surface of the framework by a clamping tool, finally placing the framework and the clamping tool into a furnace for high-temperature sintering, and taking down the powder metallurgy brake pad on the upper surface and the lower surface of the convex claw after sintering to carry out subsequent processes. Solves the problem that when stainless steel materials such as 1Cr18Ni9Ti are used as frameworks and brake pads are sintered on the frameworks, the frameworks which are not covered with powder metallurgy brake pads deform.)

1. The sintering method of the integral sintered powder metallurgy brake pad is characterized in that: according to the method, powder metallurgy brake pads (2) are placed on the middle annular structure of a framework (1) and the upper surface and the lower surface of each convex claw, then the upper surface and the lower surface of the framework (1) are completely covered by a clamping tool, finally the framework and the clamping tool are placed into a furnace for high-temperature sintering, and the powder metallurgy brake pads (2) on the upper surface and the lower surface of each convex claw are taken down after sintering, so that the subsequent process can be carried out.

2. The method of sintering a monolithic sintered powder metallurgy brake pad of claim 1, wherein: three powder metallurgy brake pads (2) are arranged on the annular structure in the middle of the framework (1).

3. The method of sintering a monolithic sintered powder metallurgy brake pad of claim 1, wherein: the convex claws are protected by adhesive tapes before the powder metallurgy brake pads (2) are placed on the convex claws.

4. The method of sintering a monolithic sintered powder metallurgy brake pad of claim 1, wherein: the powder metallurgy brake pads (2) on the upper surface and the lower surface of the convex claw completely cover the surface of the convex claw.

5. The method of sintering a monolithic sintered powder metallurgy brake pad of claim 1, wherein: the thickness of the powder metallurgy brake block (2) on the upper surface and the lower surface of the convex claw is the same as that of the powder metallurgy brake block on the surface of the annular structure in the middle of the framework (1).

6. The method of sintering a monolithic sintered powder metallurgy brake pad of claim 1, wherein: the powder metallurgy brake pads (2) on the upper and lower surfaces of the convex claw are isolated from the powder metallurgy brake pads (2) on the surface of the annular structure in the middle of the framework (1) by adopting heat-resistant paper.

7. The method of sintering a monolithic sintered powder metallurgy brake pad of claim 1, wherein: the powder metallurgy brake pads (2) on the upper surface and the lower surface of the convex claw and the powder metallurgy brake pads (2) on the surface of the annular structure in the middle of the framework (1) are made of the same material.

8. The method of sintering a monolithic sintered powder metallurgy brake pad of claim 1, wherein: before sintering the powder metallurgy material by using the stainless steel material as the framework (1), copper plating treatment needs to be carried out on the framework (1) before sintering.

Technical Field

The invention relates to the field of mechanical part processing technology, in particular to a sintering method of an integral sintering powder metallurgy brake pad.

Background

Currently, the requirement for marine corrosion resistance is very strict, and therefore, when a product is designed, the marine environment resistance of a selected material needs to be highly emphasized under the condition of ensuring the product performance.

Aiming at the aspect of wheel braking, at present, the commonly used materials are as follows: 2A14(LD10), 2A50(LD5), 2A12(LY12), TC11, 30CrMnSiA, 30CrSiMoVA, 1Cr18Ni9Ti and the like, wherein the selection of the framework material of the integral sintering powder metallurgy brake pad is commonly used: 30CrMnSiA, 30CrSiMoVA, 1Cr18Ni9Ti and the like, and for the products which are matched with the requirements of marine environment, the marine environment resistance of the 30CrMnSiA and 30CrSiMoVA materials is poor, the marine environment resistance of stainless steel materials such as 1Cr18Ni9Ti and the like is obvious, but when the brake pad is sintered on the frame made of the stainless steel materials such as 1Cr18Ni9Ti and the like, the deformation of the frame part covered with the powder metallurgy brake pad is avoided, and the deformation of the stainless steel materials such as 1Cr18Ni9Ti and the like caused by heating to about 850 ℃ is already softened in the frame part uncovered with the powder metallurgy brake pad, so that the frame part uncovered with the powder metallurgy brake pad can deform along the gravity direction, and after sintering, the deformation of the frame part uncovered with the powder metallurgy brake pad is obvious, and the patent aims to solve the deformation problem of the part of the frame uncovered with the powder metallurgy brake pad.

Disclosure of Invention

Object of the Invention

The invention provides a sintering method of an integral sintered powder metallurgy brake pad, aiming at solving the problem that when a brake pad is sintered on a framework made of stainless steel materials such as 1Cr18Ni9Ti, the framework is not covered by the powder metallurgy brake pad.

Technical solution of the invention

In order to achieve the purpose, the invention adopts the following technical scheme:

the sintering method of the integral sintered powder metallurgy brake pad comprises the steps of placing the powder metallurgy brake pad on an annular structure in the middle of a framework and the upper surface and the lower surface of a convex claw, then completely covering the upper surface and the lower surface of the framework by using a clamping tool, finally placing the framework and the clamping tool into a furnace for high-temperature sintering, and taking down the powder metallurgy brake pad on the upper surface and the lower surface of the convex claw after sintering so as to carry out subsequent processes.

Preferably, three powder metallurgy brake pads are arranged on the annular structure in the middle of the framework.

Preferably, the convex claws are protected by adhesive tapes before the powder metallurgy brake pads are placed on the convex claws.

Preferably, the powder metallurgy brake pads on the upper and lower surfaces of the lug completely cover the surface of the lug.

Preferably, the thickness of the powder metallurgy brake pad on the upper surface and the lower surface of the convex claw is the same as that of the powder metallurgy brake pad on the surface of the middle annular structure of the framework 1.

Preferably, the joints of the powder metallurgy brake pads on the upper and lower surfaces of the convex claws and the powder metallurgy brake pad on the surface of the annular structure in the middle of the framework 1 are isolated by adopting heat-resistant paper.

Preferably, the powder metallurgy brake pads on the upper surface and the lower surface of the convex claw and the powder metallurgy brake pad on the surface of the middle annular structure of the framework 1 are made of the same material.

Preferably, before sintering the powder metallurgy material by using the stainless steel material as the framework, the framework is subjected to copper plating treatment before sintering.

THE ADVANTAGES OF THE PRESENT INVENTION

The invention has the advantages that:

1) simple structure, installation and dismantlement convenient and fast.

2) The problem of deformation of the part which is not covered with the powder metallurgy brake pad is solved.

3) The problems of difficult processing and framework processing after sintering the powder metallurgy brake pad are solved.

Drawings

FIG. 1 is a schematic view of the structure of a product to be sintered.

FIG. 2 is a schematic view of a fixture clamping adopted in the sintering method of the integral sintered powder metallurgy brake pad of the present invention.

In the figure: 1-framework and 2-powder metallurgy brake pad.

Detailed Description

The detailed description of the embodiments of the present invention is provided in conjunction with the summary of the invention and the accompanying drawings.

The product to be sintered consists of a framework 1 and a powder metallurgy brake pad 2; 3 pieces of powder metallurgy brake pads 2 are respectively sintered at two sides of the framework 1.

The sintering method of the integral sintered powder metallurgy brake pad comprises the steps of placing the powder metallurgy brake pad 2 on an annular structure in the middle of a framework 1 and the upper surface and the lower surface of a convex claw, then completely covering the upper surface and the lower surface of the framework 1 by using a clamping tool, finally placing the framework 1 and the clamping tool into a furnace for sintering, and taking down the powder metallurgy brake pad 2 on the upper surface and the lower surface of the convex claw after sintering to carry out subsequent processes. Three powder metallurgy brake pads 2 are arranged on the annular structure in the middle of the framework 1. The convex claws are protected by adhesive tapes before the powder metallurgy brake pads 2 are placed on the convex claws. The powder metallurgy brake pads 2 on the upper surface and the lower surface of the convex claw completely cover the surface of the convex claw. The thickness of the powder metallurgy brake block 2 on the upper surface and the lower surface of the convex claw is the same as that of the powder metallurgy brake block 2 on the surface of the annular structure in the middle of the framework 1. The powder metallurgy brake block 2 on the upper surface and the lower surface of the convex claw and the powder metallurgy brake block 2 on the surface of the middle annular structure of the framework 1 are isolated by adopting heat-resistant paper at the joint, so that the adhesion between the convex claw and the powder metallurgy brake block 2 on the middle annular structure of the framework 1 after sintering is prevented. The powder metallurgy brake pads 2 on the upper surface and the lower surface of the convex claw and the powder metallurgy brake pads 2 on the surface of the annular structure in the middle of the framework 1 are made of the same material.

Before sintering the powder metallurgy material by using the stainless steel material as the framework 1, copper plating treatment needs to be carried out on the framework 1 before sintering in order to improve the adhesive force between the powder metallurgy material and the stainless steel material such as 1Cr18Ni9 Ti.