The Accuracy Analysis And Solutions Of Noncontact Laser Measurement For Circular Test Of NC Machine Tools

Accompany with the development of modern manufacturing industry, the precise and ultra-precise machining technique has become increasingly important. As the widely used equipments in the machining process, the CNC machine tools is facing new challenges and opportunities for the new age. Improving CNC machine tools accuracy is the key to improve the quality of CNC machine products and strengthen the market competitiveness in the world while the error of CNC machine tools is the main obstacle. The technology of measurement is key technology to reduce or compensate the error of CNC machine products.The circular test is an essential part of measurement technology on CNC machine tools. As the existing methods and equipments for circular test can not meet the request of the ultra-precise and high-speed manufacturing, new technology of measurement is required on edge. Combined with the traditional circular test system, the development of laser measurement technology lead us new way. A new system called noncontact laser measurement is introduced in this article with the main contents as follows.(1)As a new measurement system for CNC machine tools, Noncontact Laser Measurement system (NLM) is introduced. Details and characteristics are summarized by analyzing the existing measurement equipment based on which NLM is introduced. The structure, process and characteristics of NLM are shown while the principles and mathematics formula are deduced.(2)The solution and principle for separating individual error from the integrated error is deduced. Based on the relationship between circular track and origin errors, I focus on the mathematic model for main geometry origin error of CNC machine tools while tracks are plot by PC simulation. The process of separating individual error from the integrated error is shown by a...