Grinding method for machining high-precision outer spherical surface through ordinary cylindrical grinding machine

Abstract

The invention provides a grinding method for machining a high-precision outer spherical surface through an ordinary cylindrical grinding machine. The grinding method comprises the steps that firstly, a grinding wheel is selected, wherein the width of the grinding wheel is 14-16mm larger than that of a finished spherical part, the diameter of the grinding wheel is large enough so that a spherical surface of a part can be formed through grinding, and namely the distance between the outer side of the grinding wheel and an installation hole must be larger than the depth of the spherical surface; secondly, a special dressing clamp for grinding wheel dressing is manufactured, wherein a grinding machine end face grinding wheel dressing device is installed on the grinding machine, and the special dressing clamp is made to be well fixedly connected with the grinding machine end face grinding wheel dressing device; the grinding wheel is dressed until the size requirement is met by the grinding wheel; a part to be machined is fixed to the grinding machine and the dressed grinding wheel are aligned; grinding is conducted until the finished spherical part is obtained. By the adoption of the grinding method for machining the high-precision outer spherical surface through the ordinary cylindrical grinding machine, under the condition that the equipment investment is not increased, the existing ordinary cylindrical grinding machine is used for machining the outer spherical surface which has high size precision and good surface quality, and high practical value is obtained.

Description

Technical field [0001] The invention belongs to the technical field of mechanical processing, and specifically relates to a grinding processing method for processing high-precision outer spherical surfaces with function expansion on a common cylindrical grinder. Background technique [0002] Generally speaking, when the dimensional accuracy, shape accuracy, and surface roughness of the parts to be processed are low, the CNC lathe is generally used for processing. The CNC lathe is highly efficient and easy to ensure the size, which can fully meet the needs. However, when the dimensional accuracy of the part is higher than IT6, the shape accuracy error value is less than 0.005mm, and the surface roughness requirement Ra value is less than 0.4um, the turning method cannot meet the requirements of the design drawings, and more precise processing methods must be adopted. There are two existing processing methods: one is to use CNC lathes for rough machining, leaving a margin and then ...

AI Technical Summary

Problems solved by technology

However, when the dimensional accuracy of the part is higher than IT6 level, the shape accuracy error value is less than 0.005mm, and the surface roughness requirement Ra value is less than 0.4um, the turning method cannot meet the requirements of the design drawings, and more precise processing methods must be used

The existing processing methods are as follows: one is to use the CNC lathe for rough machining, and then finish machining on the grinding center machine tool after leaving the margin. This method has high processing efficiency and easy guarantee of accuracy; The value is high, and the general enterprise seldom purchases. In this case, the processing method adopted is: first use the CNC lathe for rough machining and semi-finish machining, leave a small margin and then polish to meet the requirements of the final design drawings. The processing method has high requirements on the dimensional processing accuracy and surface quality of the lathe before polishing, and the margin must be strictly controlled. The efficiency is low and the accuracy is not easy to guarantee.

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