CN110524314B

CN110524314B - Grinding method of rubber elastic material

Info

Publication number: CN110524314B
Application number: CN201910650735.1A
Authority: CN
Inventors: 王卓岗
Original assignee: Qingan Group Co Ltd
Current assignee: Qingan Group Co Ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2021-04-23
Anticipated expiration: 2039-07-18
Also published as: CN110524314A

Abstract

The invention belongs to the field of elastic material grinding, in particular to a grinding method of a rubber elastic material, and particularly relates to a grinding method of a rubber material, which comprises the following steps: step 1) preparing a grinding surface, and performing finish machining on an aluminum alloy plane to ensure that the flatness is below 0.002 mm; step 2) preparing a grinding surface by a sand blasting process, carrying out sand blasting treatment on the finely-machined aluminum alloy plane to ensure that the roughness of the aluminum alloy plane is not more than Ra8 micrometers, and removing burrs after the sand blasting treatment to obtain the grinding surface; and 3) grinding the rubber on the grinding surface, wherein an abrasive and a grinding liquid are used in grinding, the grain diameter of the abrasive is less than 0.015mm, and the hardness of the abrasive grain is more than 9 Mohs scale. The invention can grind and obtain the elastic material grinding plane with smooth surface, no bubble inclusion, no unevenness and other defects. The radial static seal structure is suitable for radial static seal, and the end face seal always adopts the same standard.

Description

Grinding method of rubber elastic material

Technical Field

The invention belongs to the field of elastic material grinding, in particular to a grinding method of a rubber elastic material, and particularly relates to a grinding method of a rubber material.

Background

The aerospace field requires seals with high dimensional tolerances, form and position tolerances, and excellent sealing surfaces to meet higher mechanical properties. Regarding the grinding of the end face of the rubber ring, reference technical data are not available at home, and the reference of the accuracy grade of the end face of the civil rubber ring is limited to the accuracy which can be achieved through a die or cutting. Therefore, to meet the technical requirements of the aerospace field on the end face precision of the rubber ring and the coupling sealing, the end face of the rubber ring needs to be subjected to secondary precision grinding processing so as to improve the precision grade of the end face of the rubber ring. The prior art is only limited to manual processing, the precision can be guaranteed, but the quality is uncontrollable, and the defects of continuous and repeated repairing, grinding and detecting exist.

The existing rubber ring end face grinding technology is mainly characterized in that 200# -400# silicon carbide polishing paper soaked by engine oil is pasted on a 200mm multiplied by 200mm platform, 20# engine oil and white corundum grinding paste with W40 granularity are added on the plane of the polishing paper, and the rubber ring is manually pressed to carry out circular motion track grinding. Utilize the abrasive material of sticking on the polishing paper to cut, the polishing paper of pasting easily takes place to slide under the effect of grinding thrust, leads to the rubber circle terminal surface atress uneven, and the abrasive material is piled up at the periphery, makes the rubber border edge collapse, and the plane degree is poor, and machining efficiency is low, and the rework rate is higher, realizes effectively that sealed the degree of difficulty is big, and is difficult for realizing batch production.

Disclosure of Invention

The purpose of the invention is as follows: the technical requirements of the aerospace field on the end face precision of the rubber ring and the coupling sealing are met, and the problem of high precision requirement of the end face of the rubber ring is solved. The rubber sealing element has high precision of dimensional tolerance, form and position tolerance and excellent sealing plane, so as to meet higher mechanical performance.

The technical scheme of the invention is as follows: provided is a method for grinding a rubber elastic material, comprising the steps of:

step 1) preparation of an abrasive surface

Performing finish machining on the plane of the aluminum alloy to ensure that the flatness is below 0.002 mm;

step 2) preparing an abrasive surface by a sand blasting process

Performing sand blasting treatment on the finely-machined aluminum alloy plane to ensure that the roughness of the aluminum alloy plane is not more than Ra8 mu m, and deburring the aluminum alloy plane after the sand blasting treatment to obtain a ground surface;

and 3) grinding the rubber on the grinding surface, wherein an abrasive and a grinding liquid are used in grinding, the grain diameter of the abrasive is less than 0.015mm, and the hardness of the abrasive grain is more than 9 Mohs scale.

Further, in the step 1) of preparing the grinding surface, the aluminum alloy plane is firstly processed by adopting a mirror grinding process, the flatness reaches 0.008mm-0.005mm, and then the aluminum alloy plane is finely ground by adopting a three-surface mutual method, so that the flatness of the flat plate is ensured to be below 0.002mm, preferably 0.002mm-0.001 mm.

Further, in the step 2) of preparing the grinding surface by the sand blasting process, the sand blasting particles are silicon carbide particles, the spraying angle is 45-60 degrees, the depth of a hardened layer is about 1. mm-1.5 mm, the surface roughness is Ra 4-Ra 8 microns, and natural oilstone is selected for deburring to uniformly grind the aluminum alloy plane.

Further, the sand blasting sand grains in the grinding surface prepared by the sand blasting process in the step 2) are selected in the range as follows: white corundum, brown corundum, silicon carbide, boron carbide, quartz sand, tungsten carbide, zirconia, synthetic diamond, and boron nitride.

Further, the elastic material is rubber.

Further, the grinding fluid is water or aviation kerosene.

Further, the abrasive is an oxidation-based abrasive, a carbonization-based abrasive, or a diamond-based abrasive.

Has the advantages that: the invention can grind and obtain the elastic material grinding plane with smooth surface, no bubble inclusion, no unevenness and other defects. The radial static seal structure is suitable for radial static seal, and the end face seal always adopts the same standard. Further, the use of an aluminum alloy flat plate is described. The aluminum alloy surface is easy to oxidize in the air to produce aluminum oxide, and the aluminum oxide is a high-quality grinding material, so that the grinding effect is further improved.

Drawings

FIG. 1 is a schematic view before grit blasting;

FIG. 2 is a schematic view after the sand blasting treatment.

Detailed Description

The following examples provide a method of grinding rubber, comprising the steps of:

step 1) preparation of an abrasive surface

step 2) preparing an abrasive surface by a sand blasting process

In the step 1) of preparing the grinding surface, the aluminum alloy plane is firstly processed by adopting a mirror grinding process, the flatness reaches 0.008mm-0.005mm, and then the aluminum alloy plane is finely ground by adopting a three-surface interaction method, so that the flatness of a flat plate is ensured to be below 0.002mm, preferably 0.002mm-0.001 mm.

And 2) in the process of preparing the grinding surface by the sand blasting process, the spraying angle is 45-60 degrees, the depth of a hardened layer is about 1-1.5 mm, the surface roughness is Ra 4-Ra 8 microns, and natural oilstone is selected for deburring to uniformly polish the aluminum alloy plane. The sand blasting particles are selected from the following ranges: white corundum, brown corundum, silicon carbide, boron carbide, quartz sand, tungsten carbide, zirconia, synthetic diamond, and boron nitride.

Claims

1. A method of grinding a rubber elastic material, comprising the steps of:

step 1) preparation of an abrasive surface

step 2) preparing an abrasive surface by a sand blasting process

2. The method for grinding a rubber elastic material as set forth in claim 1, wherein: in the step 1) of preparing the grinding surface, the aluminum alloy plane is firstly processed by adopting a mirror grinding process, the flatness reaches 0.008mm-0.005mm, and then the aluminum alloy plane is finely ground by adopting a three-surface mutual method, so that the flatness of the aluminum alloy plane is ensured to be below 0.002 mm.

3. The method for grinding a rubber elastic material as set forth in claim 2, wherein: and finely grinding the aluminum alloy plane by adopting a three-surface mutual method, and ensuring that the flatness of the aluminum alloy plane is 0.002mm-0.001 mm.

4. The method for grinding a rubber elastic material as set forth in claim 1, wherein: and 2) in the preparation of the grinding surface by the sand blasting process, the sand blasting particles are silicon carbide particles, the spraying angle is 45-60 degrees, the depth of a hardened layer is about 1. mm-1.5 mm, the surface roughness is Ra 4-Ra 8 microns, and natural oilstone is selected for deburring to uniformly grind the aluminum alloy plane.

5. The method for grinding a rubber elastic material as set forth in claim 1, wherein: step 2) the sand blasting process is used for preparing the sand blasting sand grains in the grinding surface, and the selection range of the sand blasting sand grains is as follows: white corundum, brown corundum, silicon carbide, boron carbide, quartz sand, tungsten carbide, zirconia, synthetic diamond, and boron nitride.

6. The method for grinding a rubber elastic material as set forth in claim 1, wherein: the elastic material is rubber.

7. The method for grinding a rubber elastic material as set forth in claim 1, wherein: the grinding fluid is water or aviation kerosene.

8. The method for grinding a rubber elastic material as set forth in claim 1, wherein: the abrasive is an oxidation-based abrasive, a carbonization-based abrasive or a diamond-based abrasive.