The Status and Development Prospect of Precision Machining Technology
1 Introduction to Precision Machining Technology
At present, precision machining refers to processing technology with a machining accuracy of 1 to 0.1 μm and a surface roughness of Ra 0.1 to 0.01 μm. However, this limit is constantly changing with the progress of processing technology. Today's precision machining may be tomorrow. The general processing. The problems to be solved in precision machining are firstly the processing accuracy, including shape and position tolerances, dimensional accuracy, and surface conditions. Sometimes surface defects are also the core of this problem. Second, the processing efficiency. Some processes can achieve better processing. Accuracy, but it is difficult to achieve high processing efficiency. Precision machining should include micro-machining and ultra-fine processing, finishing and other processing technologies.
2 Several commonly used precision machining methods and features
The traditional precision machining methods include cloth wheel polishing, belt grinding, ultra-fine cutting, fine grinding, honing, grinding, superfinishing polishing technology, and magnetic grain finishing.
Abrasive Belt Grinding is the use of abrasive blended cloth to grind workpieces for abrasive tools. It belongs to the category of abrasive grinding of coated abrasives. It has high productivity, good surface quality, and a wide range of applications. In foreign countries, great achievements have been made in belt materials and manufacturing processes. With the series of belts adapted to different occasions, universal and special belt grinders have been produced, and the degree of automation has been continuously improved (automatically and automatically. Adapted to control the belt grinder), but the domestic variety of belts is small, the quality needs to be improved, the machine tool is still in the transformation stage.