Quenching method for preventing major diameter sizes at two ends of splined hole of internal spline gear from being inconsistent

A technology of internal splines and gear splines, which is applied in the field of quenching to prevent inconsistent large diameters at both ends of the spline holes of internal spline gears. Low pass rate and other problems, to achieve the effect of easy implementation, basic consistency, product quality and pass rate

Inactive Publication Date: 2015-02-04
CHONGQING WINSTAR PRECISE MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inconsistent cooling speed at both ends of the inner spline hole during the quenching process, the major diameters at both ends of the inner spline hole are different, resulting in out-of-tolerance and low product qualification rate

Method used

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  • Quenching method for preventing major diameter sizes at two ends of splined hole of internal spline gear from being inconsistent
  • Quenching method for preventing major diameter sizes at two ends of splined hole of internal spline gear from being inconsistent
  • Quenching method for preventing major diameter sizes at two ends of splined hole of internal spline gear from being inconsistent

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Embodiment Construction

[0015] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0016] Such as figure 1 , 2 , Shown in 3, a kind of quenching method that prevents the large-diameter size at both ends of the spline hole of the internal spline gear from being inconsistent, including the internal spline gear 1, its process steps are as follows:

[0017] Step a: first set one of the internal spline gears 1 on a corresponding quenched mandrel 2, the quenched mandrel 2 is made of 45 steel, and has a two-stage stepped structure, and the upper small-diameter section 2a and the lower large-diameter section 2b. The length of the small-diameter section 2a is 3-5 times the length of the large-diameter section 2b, and the internal spline gear 1 is sleeved on the small-diameter section, and the outer circular surface of the small-diameter section 2a is close to the inner spline of the internal spline gear 1 keyhole wall. Moreover, the diameter of ...

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Abstract

The invention discloses a quenching method for preventing major diameter sizes at two ends of a splined hole of an internal spline gear from being inconsistent. The method comprises the following steps: a, firstly, sleeving the internal spline gear on a corresponding quenching dabber which is made from 45 steel in a two-section ladder structure and consists of an upper minor diameter section and a lower major diameter section, wherein the internal spline gear is installed on the minor diameter section in a sleeving manner and a center hole is formed axially on the quenching dabber; b, further threading a quenching dabber sleeved with the internal spline gear on a same supporting rod, wherein the quenching dabber above is supported on the below quenching dabber; and c, finally, quenching the internal spline gear which is treated in the step b. The method disclosed by the invention can be used for effectively preventing the cooling speeds at two ends of the internal splined hole from being inconsistent so as to ensure that the major diameter sizes at two ends of the internal splined hole are basically consistent, thereby guaranteeing the product quality and the yield. By adopting the quenching method, the yield of the internal spline gear is improved from original 30% to existing 95%.

Description

technical field [0001] The invention belongs to the field of processing and manufacturing of internal spline gears, and in particular relates to a quenching method for preventing inconsistency of large diameter dimensions at both ends of spline holes of internal spline gears. Background technique [0002] The internal spline gear is a widely used transmission part. In its quenching process, it is usually directly quenched. Due to the inconsistent cooling speed at both ends of the inner spline hole during the quenching process, the large diameters at both ends of the inner spline hole are different, resulting in out-of-tolerance and low product qualification rate. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a quenching method for preventing inconsistency of the large diameters at both ends of the spline hole of the internal spline gear, and to ensure that the large diameters at both ends of the internal spline...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D9/32C21D1/62
CPCC21D1/18C21D9/32
Inventor 段含辉
Owner CHONGQING WINSTAR PRECISE MACHINERY
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