A processing tool and process for arc spiral groove of large-lead multi-track ball nut

Abstract

The embodiment of the invention discloses a machining tool and a process of a large-lead multi-roller-way ball nut circular spiral groove. An equal number of cathode bulbs are uniformly arranged according to the number of thread columns of ball nuts to be machined at equally divided angles, then machining gaps are filled with electrolyte through communication between first flow channels and second flow channels, a certain working voltage is loaded at two ends of each of the cathode bulbs and at two ends of each of the ball nuts to be machined, so that roller ways of the ball nuts to be machined are corroded through the electrolyte during feeding of the machining tool, and the problem that tool abrasion influences outline precision, low precision of multiple columns of division lines and low machining efficiency is solved. The process comprises the steps that cathode guiding rods provided with the first flow channels and n cathode bulbs uniformly arranged around the lower ends of the cathode guiding rods at the equally divided angles (shown in the description) are adopted; the n cathode bulbs are arranged at the same height; the n cathode bulbs are internally provided with the second flow channels; the first flow channels are communicated with the n second flow channels.

Description

technical field [0001] The invention relates to the field of special processing, in particular to a processing tool and technology for arc spiral grooves of large-lead multi-raceway ball nuts. Background technique [0002] With the development of mechanical products in the direction of high speed, high efficiency and automation, there are requirements for ball screw pairs with large lead, multiple raceways and high precision. Increase, the difficulty of manufacturing the internal thread raceway of the nut is greatly increased, and it is difficult to guarantee the accuracy by using the traditional processing technology, and it is easy to cause excessive errors. The traditional processing technology of nut internal thread raceway is: 1. Rough turning nut raceway (with grinding allowance); 2. Nut quenching; 3. Internal thread grinder grinding nut raceway. At present, the processing methods of the ball nut raceway mainly include turning-grinding method, hard turning enveloping ...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a processing tool and process for the arc spiral groove of the ball nut with large lead and multiple raceways. The same amount of cathode ball heads are evenly arranged according to the number of thread rows of the ball nut to be processed. The first flow channel and the second flow channel are filled with electrolyte to the machining gap, and a certain working voltage is applied to both ends of the cathode ball head and the ball nut to be processed, so that the processing tool corrodes the raceway of the ball nut to be processed through the electrolyte while feeding , which solves the problems in the prior art that the tool wear affects the contour accuracy, the multi-row splitting accuracy is low, and the processing efficiency is low.

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