Machine tool table board expansion and shrinkage detection method and device, and PCB drilling machine

Abstract

The invention discloses a machine tool table board expansion and shrinkage detection method and device and a PCB drilling machine. The method comprises the steps that a tool measuring control module controls a main shaft of a machine tool to grab a tool and place the tool into a tool detector; a transmitter and a receiver are arranged in the tool detector; the tool measuring control module controls a motor to drive the main shaft to move along a first direction which is parallel to a plane where the machine tool table board is located; the receiver indicates the tool measuring control module to respectively obtain a first position and a second position of the motor along the first direction when the tool starts to touch a detection light beam and leaves the detection light beam; and a center coordinate of the detection light beam is determined according to the two positions, the center coordinate of the detection light beam is compared with a reference value, and if the difference is greater than a preset threshold, an alarm prompt is given. The tool detector is used for directly detecting the expansion and shrinkage condition of the machine tool table board, when the expansion andshrinkage of the machine tool table board are particularly large, an alarm prompt is given, and the machining precision of the machine tool is ensured.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of detection, in particular to a method and device for detecting expansion and contraction of a machine tool table and a PCB drilling machine. Background technique [0002] PCB drilling machine is a high-end processing equipment with high speed, high precision and high stability. It is used in key processes such as through-hole processing, deep hole processing, and back-drilling processing of printed circuit boards. It is extremely important for the processing quality of printed circuit boards. Impact. As the integration of printed circuit boards is getting higher and higher, the processing aperture is getting smaller and smaller, and the requirements for the processing accuracy of PCB drilling machines are also increasing. [0003] The machine tool of the PCB drilling machine is designed and assembled from various materials such as steel, iron, aluminum alloy, etc., and the therma...

AI Technical Summary

Problems solved by technology

[0003] The machine tool of the PCB drilling machine is designed and assembled from various materials such as steel, iron, aluminum alloy, etc., and the thermal expansion coefficients of different materials are different. With the change of internal temperature, the expansion and contraction of the machine table is inevitable, which will affect The positioning accuracy of drilling affects the processing accuracy of printed circuit boards

[0004] The current PCB drilling machine does not have the function of directly detecting the expansion and contraction of the machine table. Manufacturers use cooling water to take away the heat generated by the motor, etc., and indirectly judge the internal temperature of the machine tool by detecting the water temperature, thereby predicting the expansion and contraction of the machine table.

Images