A Conformal Measurement and Processing Control Method for Three-dimensional Round Jewelry

Abstract

The invention discloses a conformal measurement and processing control method for three-dimensional circular jewellery, which comprises the steps of: 1. Pre-programming a coordinate program for automatic processing of a numerically controlled machine tool according to the external dimensions of a standard jewelery blank; As the origin, the probe automatically detects point by point around the jewelry blank, and creates multiple dot coordinates on the surface for generating paths for surface compensation; 3. Compare the detected outer surface space coordinates with the standard jewelry blank outer space coordinates Comparing and calculating, the processing calibration data obtained is automatically compensated to the coordinate parameters of the automatic processing in advance, and the actual processing parameters of the CNC machine tool are obtained; 4. Start the processing of the cutter head of the CNC machine tool to obtain a standard jewelry blank. It can dynamically measure each piece of jewelry according to the shape, and automatically and precisely correct and compensate the deviation, which greatly improves the machining accuracy of the CNC machine tool and improves the economic benefits.

Description

Technical field[0001]This program belongs to the field of machining, specific jewelry processing applications.Background technique[0002]Many jewels such as gold, silver, K gold, platinum, palladium, and other metal handmen are usually manually or mechanically processed with simple electric grinding tools, such as patent names "hollow bracelet manufacturing integrated equipment" , CN201711431380.4, in the traditional hollow bracelet manufacturing process, the gold and silver sheets are processed into a circular tube and two processes of the round tube into a circular body by means of machining, but such operational processing accuracy is difficult to reach 0.05-0.5 mm. Bracelet engraving the requirements of the pattern, can't guarantee the thickness of the thousand bracelets, the fine pattern is consistent.[0003]At present, the five-axis CNC machine tool is only used to process hard metal materials such as stainless steel, cast iron, and have not found large quantities of industriali...

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 0.1-1mm difference in different parts, plus the 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 measuring axis, the accumulation of various deviation values ​​often leads to machining according to a fixed program when machining jewelry, the tool operation is unstable, and 0.05-mm engraving pattern errors are prone to occur, which leads to a high product scrap rate , up to 4-25% The cost of materials is huge, which affects the quality of jewelry

[0004] Three-dimensional circular jewelry has plane measurement and curved surface measurement, so there is no fixed processing for flat jewelry. It requires processing patterns and extremely precise grinding angles. Traditional CNC machine tools do not have suitable and accurate detection methods and advanced comparison control algorithms, so they cannot be processed according to each piece. The deviation value of the jewelry, precise compensation and control of the tool running position, can not achieve the surface processing depth accuracy of various shapes of jewelry up to 0.01-0.2 mm

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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