Numerical control spherical pair grinder and grinding method

Abstract

The invention relates to a numerical control spherical pair grinder and a grinding method and belongs to the field of machine manufacturing. In a machining process, a sphere rotates along an axis of the sphere, and valve seats of two sealing seats respectively rotate in a plane vertical to a rotating axis of the sphere; in a mutual grinding process, the valve seats of the two sealing seats are contacted with the sphere, and a grinding positive pressure is applied; and a grinding track is synthesized by two rotating movements. In the numerical control spherical pair grinder, a lathe bed is connected with a numerical control rotary table, a left numerical control slide plate and a right numerical control slide plate; the numerical control rotary table is connected with a sphere fixture; the left numerical control slide plate is connected with a left valve seat spindle box; the left valve seat spindle box is connected with a left valve seat fixture; the right numerical control slide plate is connected with a right valve seat spindle box; the right valve seat spindle box is connected with a right valve seat fixture; and the processed sphere is connected with the sphere fixture. The numerical control spherical pair grinder and the grinding method have the advantages that the machining effect is improved by more than five times, the machining quality is easily guaranteed, the machining speed can be improved, the precision of the grinded shape of the sphere and the sealing effect can be improved, and the heavy physical labor can be ridded.

Description

technical field [0001] The invention relates to a numerically controlled spherical auxiliary grinding machine and a grinding method, which are suitable for the valve manufacturing industry, and are used for finishing the ball and the valve seat of a hard-sealed ball valve, and belong to the field of mechanical manufacturing. Background technique [0002] Medium and large ball valves used in modern petrochemical and other industries have very high requirements for safety performance. Ball valves must be fire-resistant and high-temperature resistant to ensure the safety performance of inflammable and explosive fluid transportation. Non-metallic soft seals will soon melt and age under high temperature conditions, and in the long run there is also the problem of material aging. The solution is to use a metal hard seal pair: each ball valve structure has two sealing seats, all of which are made of metal materials. [0003] Due to the high sealing performance requirements of the ...

AI Technical Summary

Problems solved by technology

Because the hydraulic control parameters cannot be accurately quantified, this method cannot guarantee stable processing parameters (such as grinding surface pressure, grinding speed, etc.) during the processing process, and it is also not conducive to the improvement of automation

The equipment is large in size and power consumption, which is easy to cause environmental pollution

[0008] At present, the numerical control grinding of ball valve hard seal pair is still a blank

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