A device for grinding harmonic gears using magnetic fluid

Abstract

The invention provides a harmonic gear grinding device using magnetofluid. According to the harmonic gear grinding device, an inner hole of a thin-wall flexible gear is kept cylindrical, the portion, located in a liquid tank, of a flexible gear drum body is not grinded, an annular magnet and the flexible gear are located according to the location datum to ensure coaxiality of relative movement, a linear movement mechanism ensures the constant cutting movement speed in the grinding process of a flexible gear ring, rusted grinding materials and cuttings in the liquid tank can be discharged in time, the defects of pervious schemes are overcome, and the grinding efficiency and the machining effect of harmonic gears are improved.

Description

technical field [0001] The invention relates to the field of gear grinding, in particular to a device for grinding harmonic gears by using magnetic fluid. Background technique [0002] Harmonic gear transmission technology is a new type of transmission technology that appeared on the basis of elastic thin shell theory with the development of space science and aerospace technology in the middle of the 20th century. It has the advantages of high motion precision, large transmission ratio, light weight, small size, large carrying capacity, and can work normally in confined spaces and medium radiation conditions. It has been successfully applied in space technology, instrumentation, robots, semiconductors, etc. Industry, food packaging machinery, printing machinery and medical equipment and other fields. [0003] The usual modulus range of harmonic gear transmission is 0.1mm to 1.5mm, which belongs to small modulus gear transmission. The flexible spline, rigid spline and wave g...

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Problems solved by technology

[0006] In the device for grinding flexsplines using magnetic fluid proposed by the inventor (Deng Man, Xin Hongbing, etc., a method for grinding flexsplines using magnetic fluid. Science and Technology Innovation and Application, 2016 (6): 48), There are the following problems: 1) There is no cylindrical core inside the deformable thin-walled flexspline. In the grinding process, the deformation of the thin-walled flexspline will cause the processed ring gear and tooth shape to be deformed

2) Due to the limitation of the movement law of the mechanism, the crank slider mechanism makes the relative cutting speed of the flexible grinding head and the flexible wheel formed by the magnetic gradient magnetic field not constant, and the grinding quality of the tooth surface is not uniform

3) The O-shaped sealing ring cannot cover the flexspline body other than the internal ring gear of the sealing shell. During the processing, the flexspline body will be subjected to cutting action, which reduces the strength of the flexspline

4) During the processing, the magnetic fluid in the sealed shell cannot be renewed, and the blunted abrasives and chips cannot be discharged

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