Polishing process for inner wall of oilless vacuum pump cylinder body

Abstract

The invention discloses a polishing process for the inner wall of an oilless vacuum pump cylinder body, which is completed by matching a fixing tooling of a cylinder body of an oilless vacuum pump with a polishing tooling of the oilless vacuum pump, and the fixing tooling of the cylinder body of the oilless vacuum pump is used for roughly machining the inner wall of the cylinder body, and the polishing tooling of the oilless vacuum pump cylinder body is used for conducting finish machining on the inner wall of the cylinder body. The polishing process for the inner wall of the oilless vacuum pump cylinder body mainly comprises the following steps that S1, roughly polishing and installing the cylinder body; S2, roughly polishing and clamping the cylinder body; S3, roughly polishing the inner wall of the cylinder body and and taking out the cylinder body; S4, performing fine honing installation of the cylinder body; and S5, honing the cylinder body and taking out the cylinder body. The machining process of rough polishing and fine honing of the inner wall is adopted, two different clamping structures are provided, a hole-shaped workpiece with the irregular outer wall is fixedly clamped, the vacuum pump body is prevented from swinging in the machining process, the fixing effect of the vacuum pump cylinder body is improved, the machining precision of a product is improved, the sealing performance of a finished product is improved, and the product quality is ensured.

Description

Technical field: [0001] The invention relates to the field of mechanical vacuum pumps, in particular to a grinding process for the inner wall of an oil-free vacuum pump cylinder. Background technique: [0002] Oil-free vacuum pump refers to the device or equipment that uses mechanical, physical, chemical or physical and chemical methods to pump air from the pumped container to obtain vacuum. The sealing performance of the cylinder body is high, so the accuracy requirements for the inner wall of the cylinder Higher to ensure the stability and quality requirements of the cylinder body. Since the inner wall of the cylinder after casting is rough and has burrs, which will affect subsequent use, it is necessary to perform two steps of preliminary burr grinding and fine honing on the inner wall of the vacuum pump. Only one step can get a good quality oil-free vacuum pump cylinder. [0003] Now these two steps are generally handled manually or machine-polished and then honed. The ...

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Problems solved by technology

[0003] Now these two steps are generally handled manually or machine-polished and then honed. The problems in this method are as follows: 1. It is difficult to fix the cylinder liner during manual grinding, so the cylinder liner shakes or swings during the grinding process, thus Affect the grinding quality, the initial grinding quality affects the effect of subsequent fine honing, and the labor efficiency is low, time-consuming and labor-intensive

2. It is often difficult to adapt to cylinder liners of different sizes when the machine is polished, and the adaptability is poor, and the next step of fine honing can only be carried out after the machine is polished, which is inefficient

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