Detection system for chips adhering to electric spindle of numerical-control machine tool

Abstract

The invention discloses a detection system for chips adhering to an electric spindle of a numerical-control machine tool. The detection system comprises a conical clamp body, a power supply module, asensor module, a signal processing module and a signal transmitting module. The power supply module, the sensor module, the signal processing module and the signal transmission module are arranged onthe outer surface of the conical clamp body. The sensor module is formed by at least four resistance strain gauges which are connected into a full-bridge circuit. The resistance strain gauges are evenly distributed on the outer circular surface of the conical clamp body. The signal processing module is used for converting a weak analog signal detected by the sensor module into a digital signal. The signal transmission module is used for wirelessly transmitting detected data. A detection device is integrated on a conical clamp of the spindle, and the full-bridge detection circuit is used, so that the detection sensitivity is high; and an alarm critical value can be preset, so that frequent value calibration is not needed, and the detection stability and reliability are improved.

Description

technical field [0001] The invention relates to the field of numerical control machine tools, in particular to a chip sticking detection system for electric spindles used in numerical control machine tools. Background technique [0002] CNC machine tools are the main machine tools of the equipment manufacturing industry, and machining centers are the most important members of CNC machine tools. Due to the concentration of processes and automatic tool change in the machining center, the time for clamping, measuring and machine tool adjustment of the workpiece is reduced, so that the cutting time of the machine tool reaches about 80% of the machine tool start-up time (only 15-20% for ordinary machine tools); at the same time It also reduces the workpiece turnover, handling and storage time between processes, shortens the production cycle, and has obvious economic effects. Machining centers are suitable for small and medium-sized batch production with complex parts shapes, hig...

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Problems solved by technology

[0006] Although contact measurement technology has certain applications in workpiece positioning, coordinate setting, measuring the geometric size and three-dimensional shape of parts, tool parameters, tool wear detection, etc., it has uneven force, long measurement time, and space for measurement points. Insufficient resolution to measure birth defects such as soft objects

At the same time, due to the influence of centrifugal force, the application of contact sensors in high-speed rotation of machine tool spindles, cutting processing, etc. is also greatly restricted.

[0007] Although the detection method of the built-in sensor in the tool handle makes up for the shortcomings of the traditional contact measurement method, it may require multiple tools of different specifications to process a workpiece during the machining process. If all the tool handles have The same sensor detection device will undoubtedly increase the production cost of the product, reduce the market competitiveness of the product, and cause waste of resources, which violates the principle of green environmental protection and sustainable development

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