Non-contact automatic tool setting module and non-contact automatic tool setting method for internal thread groove of nut

Abstract

The invention discloses a non-contact automatic tool setting module and a non-contact automatic tool setting method for an internal thread groove of a nut. The method includes: an air cylinder operates to extend out a measuring bar, a proximity switch is suspended temporarily, and preparation is made for tool setting; the nut is shifted in the transverse direction (a +Y direction), and a section line of the internal thread groove in a -Y direction of an XY plane enters an effective range of the proximity switch; the nut is fed in the axial direction (a +X direction) with an axial shift positioning mechanism, after the internal tread groove enters the measurement range of the proximity switch, a switch is turned on and tool setting for the internal thread groove of the nut is performed, and switching signal change and corresponding positional information are acquired in real time; a numerical control system is used to analyze and process the signal data to obtain a corresponding central position of the internal thread groove, and corresponding coordinate transformation is made to determine a grinding start of a grinding wheel and position the grinding wheel for tool setting; and finally, the air cylinder operates to draw back the measuring bar, the nut is shifted to the correct grinding start of the grinding wheel. The invention further discloses the automatic tool setting module, the proximity switch can axially shift to extend and retract with the air cylinder, and the nut can be displaced in the horizontal plane with a transverse shift positioning mechanism and the axial shift positioning mechanism. By means of the automatic tool setting method and the automatic tool setting module, non-contact automatic tool setting can be realized for the internal thread groove of the nut, grinding precision and efficiency of the internal thread groove of the nut can be improved effectively.

Description

technical field [0001] The invention relates to a tool setting module of a thread processing machine tool and a method thereof, in particular to a non-contact automatic tool setting module of a nut internal thread raceway and a method thereof. Background technique [0002] The internal thread is an important structural feature of the nut, which plays a key role in realizing the functions of the nut (power conversion function, positioning function, synchronization function, etc.), so the machining accuracy of the internal thread must be guaranteed during the production process of the nut. During the processing of the internal thread raceway of the nut, it generally needs to undergo multiple grindings to reach the processing standard, which requires that the grinding wheel must be cut from the starting point of the internal thread helix every time it is ground, that is, it is required to achieve the right The positioning of the center of the internal thread raceway, that is...

AI Technical Summary

Problems solved by technology

Due to the obvious difference in the structural characteristics of the object, the difficulty of automatic tool setting for nuts is more difficult than that of external thread raceways. The traditional contact automatic tool setting methods and modules cannot be directly applied to the automatic tool setting of nut internal thread raceways.

And another Chinese invention patent publication number CN 102162717 A, the name is: ball nut spiral inner raceway comprehensive error automatic detection device and its method, mainly aimed at the non-contact detection of the spiral inner raceway profile, its measurement principle The method is obviously different from that of tool setting and cannot be directly applied

Therefore, there is no high-precision and efficient automatic tool-setting method and device for the non-contact tool setting of the nut internal thread raceway.

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