Hard-surface gear hobbing processing device

A processing device and hard tooth surface technology, applied in the direction of belts/chains/gears, gear teeth, components with teeth, etc., can solve the problem that the Archimedes worm gear is not suitable for high-speed operation, the machine tool is a vertical structure with a high center of gravity, Carbide tooth chipping and other problems, to achieve the effect of reducing tooth chipping, lowering the natural vibration frequency, and strengthening the tool holder

Inactive Publication Date: 2010-09-15
岑益南
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Hard-surface gear hobbing processing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Figure 5 in:

[0057] 1) Extremely shorten the main motion transmission chain

[0058] From main motor D 1 To the tool spindle C, which is the main motion transmission chain, Figure 5 A pair of reduction gears, tool spindle reduction driven gear 10 and tool spindle reduction driving gear 11 are used, and the speed ratio is 18 / 85. Main motor D 1 Choose 4-pole, synchronous speed 1500 rpm, adopt frequency conversion speed adjustment, adjust from 1000 rpm to 2000 rpm, the diameter of hardened gear hob is 300 mm, and the guaranteed cutting speed is 200 m / min to 400 m / Minute.

[0059] 2) Adopt horizontal structure

[0060] The workpiece spindle A adopts the horizontal type, the column is eliminated, and the tool post is fed in the horizontal direction, which reduces the center of gravity of the machine tool and improves the static rigidity of the machine tool.

[0061] 3) Use flat worm wheel 8 and flat enveloping worm 9 as machine tool indexing mechanism

[0062] image 3 , Figure...

Embodiment 2

[0080] Image 6 in:

[0081] In this embodiment, electric shaft transmission is used to replace high-speed transmission elements. The specific implementation scheme is: Image 6 Main motor in D 1 And work spindle drive motor D 2 Synchronous motors with the same synchronous speed are used. The two motors are like a shaft, with gears 12, 13, 14, 15, 16, 17, 18, 19 and the long spline shaft 30 eliminated in the middle.

[0082] Since the main motor D 1 Drive motor D with workpiece spindle 2 Like a shaft, the index change wheel i x , Differential change gear i y And feed changer i s The application calculation formula is the same as the first embodiment of the hardened gear hobbing machine.

[0083] This embodiment uses two AC synchronous motors instead of mechanical transmission. From the theoretical analysis: when the external power supply voltage and processing load fluctuate, it will affect the synchronization characteristics of the motor, thereby affecting the processing accuracy o...

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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 the hard-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 hard-tooth surface gear processing device, in particular to a hard-tooth surface gear hobbing processing device. (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. However, after quenching, the gear deforms greatly, which reduces the gear accuracy and noise. The current method to overcome this problem is to use gear grinding technology, but the cost of the gear grinding technology is very high and has not been widely adopted. The working principle of the worm gear grinding machine that appeared in recent years is the same as that of 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 it is more efficient than the gear hobbing process. It is still low because the cutting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23F5/20
Inventor 岑益南
Owner 岑益南
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