Double-sided precision grinding method and equipment for enveloping toroidal worm tooth surface

Abstract

The invention relates to a processing method of mechanical grinding or polishing and equipment thereof, in particular to a method for grinding and polishing the toothed surface of a toroid enveloping worm with a sanding belt or a polishing belt as a tool, and equipment thereof. The method realizes double-side grinding processing of the toothed surface of the toroid enveloping worm in terms of theenvelope generating grinding principle by a form copying method. The equipment for realizing the grinding of the toothed surface of the toroid enveloping worm by the method is composed of the sandingbelt or a polishing belt, a driving wheel and a compression module, wherein the sanding belt or the polishing belt is driven by the driving wheel and moves around the compression module correspondingto the ground toothed surface of the toroid enveloping worm to form continuous grinding main movement; and the relative movement relationship between the toroid enveloping worm and the grinding head of the sanding belt is adaptive to the type of the worm to be processed. Compared with the prior art, the method of the invention has the advantages of realizing double-side grinding, effectively controlling the tooth thickness of the worm, accurately relief-grinding the hob rear angle of the worm, and performing grinding at high efficiency, etc.; therefore, the method is an effective method for improving the processing accuracy and grinding efficiency of the toroid enveloping worm.

Description

technical field [0001] The invention relates to a mechanical grinding or polishing processing method and equipment thereof, in particular to a method and equipment for grinding or polishing the tooth surface of an enveloping toroidal worm by using an abrasive belt or a polishing belt as a tool. Background technique [0002] The enveloping toroidal worm drive has the advantages of multi-tooth contact, large coincidence, high load capacity, and long service life. It is the main development direction of the current power worm drive and is used in aerospace, ship navigation, mining metallurgy, coal mine chemical industry and other fields. widely. At present, the following problems exist in the processing of the enveloping toroidal worm drive pair: ① During the grinding of the enveloping toroidal worm, the layout of the machine tool and the grinding head is limited, and the grinding of one side of the tooth surface needs to be turned over after grinding. The tooth surface on the...

AI Technical Summary

Problems solved by technology

At present, the following problems exist in the processing of the enveloping toroidal worm drive pair: ① During the grinding of the enveloping toroidal worm, the layout of the machine tool and the grinding head is limited, and the grinding of one side of the tooth surface needs to be turned over after grinding. The tooth surface on the other side can only be ground by turning the head or turning the worm around, so it is easy to produce adjustment errors and increase the auxiliary adjustment man-hours, reducing the machining accuracy and grinding efficiency of the worm; In terms of tooth thickness control, tooth thickness calipers are still used to measure throat tooth thickness. The accuracy depends entirely on the operator's technical level. During the production process, repeated inspections and trimming are required until the side clearance of the transmission pair meets the requirements, which greatly increases Operating man-hours and labor intensity, and the scrap rate is high, and they are basically not interchangeable; ③ For the worm gear hob of the secondary enveloping toroidal worm drive pair, the existing processing method cannot accurately relieve the relief angle, making the worm gear The accuracy of the hob is not high and the number of cutting edges is limited, so the conjugation between the hobbed worm wheel and the worm is poor

Patent No. CN1248504A discloses an approximate grinding method for a plane enveloping toroidal worm, and the patent No. CN1970208A discloses a double-revolving curved quadratic enveloping toroidal worm pair and its manufacturing method. These two grinding methods It can achieve double-sided grinding, but the grinding wheel cannot be restored after dressing, so its machining accuracy is not high

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