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Method for processing internal spline of blind hole on end face of cylindrical shaft

A technology of internal splines and cylindrical shafts, which is applied in the field of improving the processing method of internal splines in blind holes on the end faces of cylindrical shafts. It can solve the problems of scrapped parts, easy occurrence of out-of-tolerance, and difficulty in gear shaping operations, etc., and achieves high pass rate and excellent processing low cost effect

Inactive Publication Date: 2012-06-20
中国航空工业集团公司航空动力控制系统研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: First, it is necessary to open a cutter and chip removal annular groove with an inner diameter larger than the bottom diameter of the inner spline inside the blind hole on the end face of the cylindrical shaft. When the diameter of the cylindrical shaft is small, it is difficult to meet the requirements of the chip removal annular groove. radial space required
Second, because the inside of the blind hole cannot be observed, it brings great difficulty to the gear shaping operation, and it is easy to cause waste products due to out-of-tolerance during processing, and the product qualification rate is low
Once out-of-tolerance causes waste, the entire part will be scrapped, causing great economic losses
Third, when the splines in the blind hole are non-standard teeth, the non-standard forming tools used must be specially customized, which will greatly increase the processing cost of the splines in the blind hole

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Process an internal spline at one end of the high-speed rotating shaft. The specifications of the internal spline are: I NT 18z×1.5m×30P×6H (see GB / T 3478.1), the material of the shaft is 40Cr, and the diameter is φ40k6. Check the table and get It is known that the bottom diameter of the internal spline is φ29.70, and the axial length of the internal spline is 22mm. The main implementation steps are as follows:

[0019] 1. First process a process blind hole on the end face of the shaft, the hole diameter is φ35H8, and the depth is 22mm.

[0020] 2. Using 40Cr material, the blank of the inner spline bushing is machined, the diameter is 0.01mm-0.03mm larger than the actual diameter of the blind hole in the process, and the length is 22mm. The inner spline is processed by the gear shaping method.

[0021] 3. Press the inner spline bushing into the process blind hole on the end face of the cylindrical shaft, and keep the end face of the inner spline bushing flush with the ...

Embodiment 2

[0024] Process an internal spline at one end of the high-speed rotating shaft. The specifications of the internal spline are: I NT 24z×1.25m×30P×6H, the material of the shaft is 40Cr, and the diameter is φ50f7. The internal spline is a non-standard specification. Calculate the bottom diameter of the inner spline to be φ32.25mm, and the axial length of the inner spline to be 29mm. The main implementation steps are as follows:

[0025] 1. Process a process blind hole on the end face of the shaft, the hole diameter is φ42H8, and the depth is 29mm.

[0026] 2. Using 40Cr material, the blank of the inner spline bushing is machined, the diameter is 0.01mm~0.03mm larger than the actual diameter of the blind hole, and the length is 29mm. The internal spline is processed by wire cutting method.

[0027] 3. Press the inner spline bushing into the process blind hole on the end face of the cylindrical shaft, and keep the end face of the inner spline bushing flush with the end face of th...

Embodiment 3

[0030] Process an internal spline at one end of the slender shaft rotating at high speed. The specification of the internal spline is: I NT 16z×1m×30P×6H (GB / T3478.1), the material of the shaft is No. 45 steel, and the diameter is φ30h9 , it is known from the table that the bottom diameter of the internal spline is φ17.80, and the axial length of the internal spline is 50mm. The main implementation steps are as follows:

[0031] 1. Process a process blind hole on the end face of the shaft, the hole diameter is φ25H8, and the depth is 50mm.

[0032] 2. Using No. 45 steel, the blank of the inner spline bushing is machined, the diameter is 0.01mm-0.03mm larger than the diameter of the blind hole in the process, and the length is 50mm. The internal spline is processed by wire cutting method.

[0033] 3. Press the inner spline bushing into the process blind hole on the end face of the cylindrical shaft, and keep the end face of the inner spline bushing flush with the end face of t...

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Abstract

The invention belongs to a machining technology, and relates to an improved method for processing the internal spline of a blind hole on the end face of a cylindrical shaft. The method is characterized by comprising the following steps of: processing a technical blind hole on the end face of the cylindrical shaft; manufacturing an internal spline bushing; press-installing the internal spline bushing; and locking the binding face between the internal spline bushing and the technical blind hole of the cylindrical shaft. With the method, no cutter relieving and chip groove is arranged in the blind hole on the end face, the qualification rate of the processed internal spline of the blind hole is high, and the processing cost is low.

Description

technical field [0001] The invention belongs to the mechanical processing technology, and relates to the improvement of the spline processing method in the blind hole of the cylindrical shaft end face. Background technique [0002] At present, the method of processing the internal spline of the blind hole on the end face of the cylindrical shaft is to use a forming tool for gear shaping processing. Its disadvantages are: First, it is necessary to open a cutter and chip removal annular groove with an inner diameter larger than the bottom diameter of the inner spline inside the blind hole on the end face of the cylindrical shaft. When the diameter of the cylindrical shaft is small, it is difficult to meet the requirements of the chip removal annular groove. Radial space required. Second, because the inside of the blind hole cannot be observed, it brings great difficulty to the gear shaping operation, and it is easy to cause waste products due to out-of-tolerance during proces...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 史春雨刘剑平赵柏松
Owner 中国航空工业集团公司航空动力控制系统研究所
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