Instrument and method for measuring secondary clamping deviation during numerical control machining based on image technology

Abstract

The invention discloses an instrument and a method for measuring secondary clamping deviation during numerical control machining based on an image technology. A large-scale automobile covering mold is generally required to be subjected to heat treatment during actual machining, and a fixture is not separated from a workpiece during heat treatment, so positioning deviation can be generated on the X-axis and the Y-axis when the fixture and the workpiece are arranged on an operating platform of a machine tool again. The measuring instrument is divided into two parts, wherein a first part consists of a camera and a digital signal processor (DSP); a second part is a shot object; a special measuring target which is specially manufactured is used as the shot object; a base of the special measuring target is made of 45 steel; a red light emitting diode (LED) tube is arranged on the upper surface of the special measuring target; a scribed line layer is made of transparent toughened glass; a black shading coating is coated on the upper surface of the transparent toughened glass; an accurate scribed line is carved on the coating and is used for shooting and measuring; the size of a red rectangular frame is 10.00*10.00 mm; and an X-directional horizontal ruler and a Y-directional horizontal ruler are arranged on the scribed line layer respectively. The instrument and the method are used for measuring the secondary clamping deviation during numerical control machining.

Description

Technical field: [0001] The invention relates to a device for measuring the deviation of secondary clamping of numerical control machining, in particular to a measuring instrument for measuring the deviation of secondary clamping of numerical control machining based on image technology and an installation and measurement method. Background technique: [0002] In the actual processing of large-scale automobile covering molds, heat treatment is usually required. During heat treatment, the fixture and the workpiece are not separated. In this way, when the fixture and workpiece are installed on the machine tool table again, there will be positioning deviation on the X and Y axes. Therefore, the two parts of the workpiece are eliminated. The deviation caused by the secondary clamping is the key issue to improve the quality of the mold. At present, domestic methods mainly adopt manual measurement to eliminate positioning deviation, such as edge finder tool setting method and dial ...

AI Technical Summary

Problems solved by technology

The edge finder tool setting method is an effective method, but it requires that the workpiece must be a good conductor, and the zero must be reset after the tool is changed. If the zero point is machined out, indirect tool setting is required, and the efficiency and accuracy will be greatly reduced. Decline; the dial gauge tool setting method is to measure the positioning pins separately, and calculate and adjust the position of the tool starting point through the measured data to complete the tool setting and processing. The existing method estimates The error of the deviation value is very large, and the workload is large, it takes a lot of man-hours, the work efficiency is low, and the requirements for the operator's technical level are also very high, which is relatively backward

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