Contact-type automatic alignment device and method for numerical control internal thread machine tool

Abstract

The invention provides a contact-type automatic alignment device for a numerical control internal thread machine tool. The contact-type automatic alignment device comprises an X-axis moving mechanism, a Z-axis moving mechanism, a C rotating shaft mechanism with a workpiece clamping shaft mechanism, an A rotating shaft mechanism, an M multi-station switching mechanism and a numerical control system. The M multi-station switching mechanism comprises a multi-station chuck, a chuck switching mechanism and a grinding spindle. The grinding spindle comprises an electric spindle and a locking chuck. The center datum of a C rotating shaft and the center datum of an A rotating shaft are located on the same horizontal plane. When a grinding wheel is switched onto the grinding spindle, the geometric center of the grinding wheel is located on the center line of the A rotating shaft. The invention further provides a contact-type automatic alignment method for the numerical control internal thread machine tool. By means of the contact-type automatic alignment device and method for the numerical control internal thread machine tool, the numerical control internal thread machine tool can achieve automatic alignment, no manual operation is required, alignment is accurate, fast and safe, operation is easy, reliable and rapid, the overall device is advanced, the mechanism is simple, and switching precision efficiency of a measuring head and the grinding wheel is high. In particular, the technical problem of automatic alignment of small-sized internal thread machine tools is solved.

Description

technical field [0001] The invention relates to the field of numerical control machine tools, in particular to a contact type automatic alignment device and method for a numerical control internal thread machine tool. Background technique [0002] At present, the alignment of CNC internal thread machine tools is recognized by the industry as the most difficult problem to solve. Especially the small internal thread cannot meet the measurement range requirement of the existing non-contact sensor. There are the following problems in the alignment of CNC internal thread machine tools: the internal thread is located in the shaft, and the actual situation of the internal thread cannot be seen by the naked eye, resulting in inaccurate alignment, difficult grinding, and easy breaking of the grinding wheel. [0003] Traditional internal thread alignment is performed by experienced workers relying on manual feeding at low speed, and the alignment is performed through sparks generated...

AI Technical Summary

Problems solved by technology

Especially the small size of the internal thread cannot meet the measurement range requirements of the existing non-contact sensors

There are the following problems in the alignment of CNC internal thread machine tools: the internal thread is located in the shaft, and the actual situation of the internal thread cannot be seen by the naked eye, resulting in inaccurate alignment, difficult grinding, and the grinding wheel is easy to break

[0003] The traditional internal thread alignment is fed at a low speed manually by experienced workers relying on feeling, and the alignment is carried out through the sparks generated by grinding. The processed threads are difficult to meet the machining accuracy, the workpiece is not uniform and the production efficiency is low.

The existing technology uses a non-contact sensor to be placed inside the threaded hole, and the signal is collected and analyzed, but this method is only suitable for internal threaded holes that are larger than the sensor's overall size, so the grinding range is limited, and the oil mist during grinding Environment can affect sensor accuracy

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