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Rotating shaft key groove machining method

A processing method and keyway technology, which is applied in the field of electric transmission system, can solve the problems of large tool wear, easily out-of-tolerance keyway size, poor surface roughness of keyway, etc., and achieve the effects of improving service life, ensuring processing quality and improving processing efficiency

Inactive Publication Date: 2013-10-09
CRRC QISHUYAN CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are problems with this method: one is that the tool wears a lot and the life is short; the other is that the size of the keyway is easy to exceed the tolerance, resulting in a large upper opening of the keyway and a small lower opening, and the surface roughness of the keyway is poor

Method used

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  • Rotating shaft key groove machining method
  • Rotating shaft key groove machining method
  • Rotating shaft key groove machining method

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Embodiment Construction

[0016] A method for processing a shaft keyway is as follows:

[0017] 1. Fine grinding the outer circle of the shaft journal.

[0018] 2. Place the rotating shaft on the vertical milling machine and support it to the journal level with a V-shaped block and adjust it to be parallel to the machine table and press it tightly.

[0019] 3. Mark the line to determine the processing length of the keyway.

[0020] 4. Correct the center of the machine tool spindle to be consistent with the center of the rotating shaft.

[0021] 5. Drill a flat-bottomed technical hole at one end of the keyway with a Φ19 twist flat-bottomed drill bit, with a depth of 5.8mm.

[0022] 6. Use a high-speed steel vertical milling cutter with a diameter of Φ19.8, and enter the process hole through the process hole to rough-mill the keyway. The size of the key is 19.8mm wide and 5.8mm deep. Speed ​​V=20mm / min.

[0023] 7. Clean up the machined iron filings in the keyway.

[0024] 8. Use Φ20-0.03 double-edg...

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Abstract

The invention relates to the technical field of electric transmission systems, in particular to a rotating shaft key groove machining method. The method comprises the steps of accurate grinding-pressing-line marking-hole drilling-rough milling-cleaning- finish milling. The hole drilling step is that a twisting flat bottom drilling head of phi 19 is used for drilling a flat bottom auxiliary hole with the depth of 5.8mm in one end of a key groove. The rough milling step is that a high-speed steel stand type milling cutter of phi 19.8 is used for entering the auxiliary hole to mill the key groove in a rough mode, the size key width is 19.8mm, and the depth is 5.8mm. The finish milling step is that a double-edge high-speed steel whole key groove milling cutter of phi 20-0.03 is used for carrying out finish milling machining, finish machining allowances on two sides are 0.1mm, and an allowance on the bottom face is 0.2mm. The key groove is subjected to rough machining and finish machining, different machining cutting amounts are selected, and accordingly key groove machining quality is effectively guaranteed; service life of a knife is prolonged; machining efficiency is improved; roughness of the surface of the key groove is good.

Description

technical field [0001] The invention relates to the technical field of electric transmission systems, in particular to a method for processing key grooves of a rotating shaft. Background technique [0002] The shaft is an important part of the traction motor of a diesel locomotive. The material of the shaft is forged steel 35CrMo. After rough machining, it is heat-treated and tempered. Rate: A≥15%, reduction of area: Z≥45%, impact strength αk≥58.84, surface hardness: about HB280-300. According to the structural requirements of the rotating shaft, there is a keyway with a length of 470mm, a width of 20, and a depth of 6 on the outer circle to be machined. The processing method of the original keyway is: 1. Fine grinding the outer circle of the journal of the rotating shaft; 2. Place the rotating shaft on the vertical milling machine and use a V-shaped block to support it to the journal level and adjust it to be parallel to the machine table and press it; 3. Mark the line to...

Claims

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Application Information

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IPC IPC(8): B23P15/00
Inventor 路亚光许亚英
Owner CRRC QISHUYAN CO LTD
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