Conformal measurement processing control method and its application in the field of jewelry processing

Abstract

The invention discloses a conformal measurement processing control method and its application in the field of jewelry processing. The method includes steps 1. Pre-programming a coordinate program for automatic processing of a CNC machine tool according to the external dimensions of a standard jewelry blank; 2. Controlling the probe of the processing machine tool to surround Jewelry blanks are automatically detected point by point along with the shape, and the spatial coordinate position of the outer surface of the jewelry blank to be processed is obtained, and fed back to the computer of the CNC machine tool; 3. The spatial coordinates of the outer surface of the detected jewelry blank are compared with the standard jewelry blank The outer space coordinates are compared and calculated to obtain processing calibration data, which is automatically compensated to the coordinate parameters of the pre-automatic processing to obtain the actual processing parameters of the CNC machine tool; 4. Start the CNC machine tool head processing to obtain a standard jewelry blank. It can dynamically measure each piece of jewelry according to the shape, automatically and precisely correct and compensate the deviation, which greatly improves the processing accuracy of the CNC machine tool, so that the pass rate of all kinds of jewelry processing can reach more than 99.8%, and the scrap rate is significantly reduced.

Description

technical field [0001] This scheme belongs to the field of mechanical processing, specifically the application field of jewelry processing. Background technique [0002] A CNC machine tool is an automated machine tool equipped with a program control system. The control system has a high degree of automation and works according to the designed operating program. There are three-axis CNC machine tools and five-axis CNC machine tools. Among them, the XYZ three-axis mechanical arm can move in three-dimensional space, and the five-axis CNC machine tool has high machining accuracy and stability. The processing quality is usually used to process metal parts and plastic parts. [0003] Many jewelry such as gold, silver, K gold, platinum, palladium and other metal jewelry processing usually rely on manual processing with simple electric polishing tools, such as the patent name "Hollow Bracelet Manufacturing Integrated Equipment", CN201711431380 .4. In the traditional hollow bracele...

AI Technical Summary

Problems solved by technology

This is because the shape, size, texture, and inner and outer patterns of different jewelry are different. Because each jewelry rough body has slight differences in thickness and size, such as 0.2-1 mm difference in different parts, plus assembly to the machine tool fixture When it is fixed on the top, there is a deviation value for jewelry clamping. In addition, the five-axis CNC machine tool itself has mechanical deviation values, including linear error, straightness in the horizontal direction, straightness in the vertical direction, yaw angle in the horizontal plane, pitch angle in the vertical plane, and The roll angle deviation around the measurement axis, the accumulation of various deviation values ​​often leads to the machining of jewelry according to a fixed program, the tool operation is unstable, and the engraving pattern error of 0.05-1 mm is prone to occur, resulting in product scrap rate Large, up to 4-25%, the cost of materials is huge, affecting the quality of jewelry and making it impossible to sell

[0005] Because of the changeable shape and soft texture of jewelry, it is required to process patterns and the grinding angle is extremely precise. Traditional CNC machine tools do not have suitable and accurate detection methods and advanced comparison control algorithms, so they cannot accurately compensate and control the tool according to the deviation value of each piece of jewelry. Operating position, unable to achieve surface processing depth accuracy of 0.01-0.2 mm for various shapes of jewelry

Existing machine tool processing technology cannot guarantee industrial production to process thousands of pieces of jewelry a day, with high quality and extremely low scrap rate

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