Method for on-line fault diagnosis of vibration threading and its equipment

Abstract

The present invention relates to a vibration threading on-line fault diagnosis method and its equipment, including vibration threading machine unit, drive and control unit of stepper motor and torque measuring unit, a torque sensor and a threading torque analysis and storage system are series-connected between its main sahft input end and threading grip holder, and said torque sensor is fixedly connected with main shaft of threading machine by means of elastic holding mechanism formed from elastic holder base cover, locking cover and locking screw. Said invention adopts the stepper motor as vibration source and threaidng force source, utilzies torque sensor to receive moving force and vibration source signal transferred by main shaft of machine tool of machine unit, and unilizes the signal amplification.

Description

Technical field [0001] The invention belongs to the field of mechanical processing, in particular to an on-line fault diagnosis method for vibration tapping and a device thereof, which is applied to tapping processing in mechanical processing, especially the tapping processing of difficult-to-machine materials and tiny threaded holes. Background technique [0002] The new technology of vibration tapping originally came from Japan. Its appearance opened up a new way to solve problems such as tapping of difficult-to-machine materials, tapping of high-precision threaded holes and tapping of small threaded holes. Vibration tapping is based on traditional tapping, and a regular circumferential vibration is added to the tap or workpiece, so that the continuous cutting process in the traditional tapping method becomes an intermittent, instantaneous and repetitive cutting process, thus overcoming the The traditional tapping method has the defects of closed cutting area, high cutting...

AI Technical Summary

Problems solved by technology

[0005] ①The flexibility of the tapping system is insufficient. Since most tapping machines add a tapping profile to the tapping spindle, the main problem is: when the vibration tapping is used for thread tapping with different diameters, the The vibration amplitude, cutting speed and vibration frequency are all different. Therefore, the previous tapping system vibration tapping process parameters were not flexible enough to meet the thread vibration tapping of various thread diameters and pitches. The existence of the wire pattern makes it impossible for these vibration tapping machines to expand functions, such as drilling and reaming functions, etc.

[0006] ②The tapping processing system has no online monitoring and fault diagnosis functions. Since tapping processing is a closed or semi-closed processing, the working condition of the tap is relatively bad, so the tap often breaks during the tapping process.

At present, there is no online monitoring and fault diagnosis function for vibrating tapping machines at home and abroad, which can predict the possible damage of taps in time

[0007] ③ The process parameter setting methods of vibratory tapping are inconsistent. Many of the existing vibratory tapping methods use the rotational angular velocity to define the vibratory tapping speed. Because the diameters of the taps are very different, under the same angular velocity, the diameters of the taps are different. The speed is also different. The real tapping cutting speed is the linear speed of the tap, and the cutting linear speed has an impact on the tapping torque of vibration tapping.

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