Hard-surface gear hobbing processing device

Abstract

The invention discloses a hard-surface gear processing device, in particular to a hard-surface gear hobbing processing device which comprises a cutter and a hard-surface gear hobbing machine and is characterized in that the cutter adopts a hard-surface gear hobbing plate, a main motion transmission chain is shortened to a limit by the hard-surface gear hobbing machine, a working main shaft of thehard-surface gear hobbing machine is in a horizontal structure, and a dividing mechanism of the hard-surface gear hobbing machine comprises a plane worm wheel and a plane enveloped worm gear. In the hard-surface gear processing device, the hard-surface gear processing cutter has reliable operation, simple use and low cost, a hard-surface gear hobbing processing lathe has high rigidity and efficiency, eliminates the deformation of the quenched gear, reduces noise, provides an economic technology for processing the quenched gear, eliminates fine crackles on the gear surface of the quenched gear, and improves the anti-fatigue performance of the gear so as to prolong the service life of the gear.

Description

(1) Technical field [0001] The invention relates to a gear processing device with a hardened surface, in particular to a gear hobbing device with a hardened surface. (2) Background technology [0002] In order to improve the working performance of the gear, the gear teeth must be quenched after processing to obtain a hard tooth surface, but after quenching, the gear deformation is large, and the gear precision is greatly reduced and the noise is increased. The current method to overcome this problem is to use the gear grinding process, but the cost of the gear grinding process is very high, and it has not been widely used. The worm sanding gear grinding machine that appeared in recent years has the same working principle as the gear hobbing machine. Compared with the disc grinding wheel and the cone grinding wheel gear grinding machine, the processing efficiency of this gear grinding machine is much higher, but compared with the gear hobbing process, the efficiency It is st...

AI Technical Summary

Problems solved by technology

The high-speed operation of the machine tool causes the ultra-high-speed operation of the indexing worm to cause the loss of the accuracy of the machine tool

[0007] 2) Difficult to manufacture shovel back tool, high tool cost

[0012] In the prior art gear hobbing machine, the motion is transmitted from the main motor to the tool spindle of the machine tool, through the belt pulley, the speed hanging wheel, three pairs of bevel gears, the main shaft reduction gear and the long spline shaft. The transmission elasticity is large, and the dynamic rigidity is insufficient. Torsional vibration will be generated under the pressure, which will cause the carbide tooth to chip

[0013] 2) The machine tool is a vertical structure with a high center of gravity

[0014] The prior art gear hobbing machine is of vertical structure, the tool rest is suspended on the column, and feeds vertically, the center of gravity is relatively high, and it is prone to vibration. The machine tool with such a structure is used for gear hobbing of hard tooth surface, which may cause chipping of the teeth

[0015] 3) The indexing mechanism of the prior art gear hobbing machine adopts the Archimedes worm gear, which is not suitable for high-speed operation

During the meshing process of this kind of worm gear, its contact line is parallel to the linear velocity of the worm, so no lubricating oil wedge can be generated, and it is not suitable for high-speed operation.

The manual of Y38 gear hobbing machine stipulates that the rotating speed of the indexing worm shall not exceed 508 rpm, which is the cutting speed of high-speed steel tools, and the cutting speed of high-quality high-speed steel is about 80 m / min. If the cutting speed of the cemented carbide for processing hardened steel is about 250 m / min, the indexing worm of the machine tool will run at a super high speed of 1588 rpm, and the precision of the machine tool will be lost soon.

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