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A kind of hard tooth surface gear processing technology

A kind of processing technology and hard tooth surface technology, applied in the field of hard tooth surface gear processing technology, can solve the problems of low grinding efficiency, affecting gear production efficiency, difficult to control precision, etc., to improve production efficiency and production efficiency, improve inner hole Cylindricity accuracy and tool life, the effect of reducing vibration

Active Publication Date: 2021-12-14
河南蒲瑞精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The reason why at the end of gear machining, the center hole of the gear is processed by fine grinding instead of fine turning. The main reason is that the surface hardness of the gear is relatively high after carburizing, and the keyway has been opened, so the center hole of the gear is no longer If a complete round surface is machined by turning, intermittent turning will occur, which makes it difficult to control the precision, severe tool wear, and increased scrap rate, especially for hardened gears with a hardness of 45HRC-62HRC. In the prior art, fine grinding is used for final processing; however, the disadvantage of grinding compared to turning is that the grinding efficiency is too low, especially for mass-produced parts such as gears, the low efficiency means The production capacity will be reduced a lot, which will greatly affect the production efficiency of the gear

Method used

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  • A kind of hard tooth surface gear processing technology
  • A kind of hard tooth surface gear processing technology
  • A kind of hard tooth surface gear processing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] combined with Figure 1-7 The hard-toothed gear processing technology includes the following steps:

[0024] S1, blanking, making blank;

[0025] S2, rough turning, rough turning on the surface of the blank;

[0026] S3, quenching and tempering, performing quenching and tempering treatment on the blank;

[0027] S4, semi-finishing, semi-finishing the end face and outer wall of the blank;

[0028] S5. Process the inner hole, drill the inner hole at the center of the blank, determine the aperture r1 with a deformation allowance according to the deformation interval of the inner hole diameter before and after carburizing, and turn the inner hole diameter to r1;

[0029] In fact, it is clear to those skilled in the art that in actual operation, it is difficult to accurately control the interval value ∆r of the pore diameter change of the gear inner hole before and after carburizing, because it depends on the pore size, pore length, heat treatment temperature, time etc. ...

Embodiment 2

[0036] Compared with Example 1, in step S6, the distance value between the intersection point o and the end point a is based on the deformation interval before and after carburizing of the inner hole diameter, and the maximum deformation value ∆r is taken; the position of the end point a cannot be along the design The groove wall is randomly selected towards the inside of the keyway, that is, the structure of the keyway should not be too far behind, and the deformation error before and after carburizing should also be considered, so it should not be too far forward.

Embodiment 3

[0038] Compared with Example 1, in step S6, the chamfer is tangent to the circle where the aperture r1 is located at the tangent point b; that is, the chamfer is more gentle and excessive, and the buffering effect is maximized to reduce the gap of the intermittent turning notch. Back to eat the amount of knife.

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Abstract

A hard tooth surface gear processing technology related to the technical field of gear manufacturing, comprising the following steps: S1, blanking; S2, rough turning; S3, quenching and tempering; S4, semi-finishing turning; S5, machining inner holes, in the rough parts Drill the inner hole at the center position, and turn the diameter of the inner hole to r1; S6, process the keyway and keyway chamfering, use the chamfering broach to pull out the keyway and the two symmetrical chamfers at the keyway notch; the chamfering The end point a close to the end of the keyway needs to be satisfied, and the intersection point o of the circle with the design aperture of the inner hole r and the corresponding groove wall of the designed keyway is taken as the reference point, and is selected along the designed groove wall toward the interior of the keyway; S7, gear hobbing; S8, penetration Carbon; S9, finishing, finish machining the surface of the workpiece, in which the outer teeth are finely ground, and the inner hole is fine-turned to the design aperture r by using the turning tool; While improving the efficiency, the tool wear problem caused by intermittent turning is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of gear manufacturing, in particular to a gear processing technology with hard tooth surface. Background technique [0002] As we all know, the processing and production of gears is essentially the processing of the outer dimensions of the gears to meet the requirements of the transmission, and the heat treatment of the gears to meet the performance requirements, and the focus of processing the outer dimensions of the gears is mainly the gear. Tooth shape, inner hole and keyway are processed; so far, the processing technology of gears has been relatively mature. For example, the Chinese invention patent with the notification number CN110102990A discloses a gear processing technology, including S1, blank purchase, S2, blank Normalizing, S3, machining, S4, grinding center hole, S5, keyway opening, S6, gear hobbing, S7, carburizing and hanging polishing, S8, rough grinding, S9, gear skiving, S10, fine grinding ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 李计全吴超凡郭仕博倪文强
Owner 河南蒲瑞精密机械有限公司
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