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High-precision rectangular spline shaft manufacturing process

A manufacturing process and spline shaft technology, which is applied in the field of high-precision rectangular spline shaft manufacturing technology, can solve the problems of simple manufacturing process and poor positioning accuracy, and achieve the effect of improving work efficiency and spline shaft accuracy

Inactive Publication Date: 2014-01-22
常州市格里森前进齿轮有限公司
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AI Technical Summary

Problems solved by technology

[0002] At present, spline shafts generally adopt outer diameter positioning in China, which is characterized by simple manufacturing process and poor positioning accuracy. In foreign countries, bottom diameter positioning (inner positioning) is generally used, which has high precision and accurate positioning.

Method used

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Embodiment Construction

[0015] This high-precision rectangular spline shaft manufacturing process includes:

[0016] The first step is material selection, using 40Cr material (selected according to conditions);

[0017] The second step, rough turning, is to process the spline blank;

[0018] The third step is quenching and tempering treatment, the hardness is HB250~280, and the strength of the core of the spline shaft is enhanced;

[0019] The fourth step, CNC lathe semi-finishing, the bearing retaining allowance is 0.3~0.5mm;

[0020] The fifth step, the knurling key, uses a spline milling machine with a grinding hob to process the key width and bottom diameter, leaving a margin of 0.3~0.4mm;

[0021] The sixth step, quenching (heat treatment), the spline part adopts high-frequency quenching, the hardness is HRC48~53°, and the hardness of the spline part is improved;

[0022] The seventh step is to grind the outer diameter of the cylindrical grinder (according to the technical requirements of the...

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Abstract

The invention relates to the technical field of spline shafts, in particular to a high-precision rectangular spline shaft manufacturing process. According to the high-precision spline shaft manufacturing process, first, materials are selected, namely, 40Cr materials (selected according to the requirement) are adopted; second, rough turning machining is conducted on the spline workblank; third, thermal refining is conducted, wherein the rigidity HB is 250-280, and spline shaft core strength is improved; fourth, digital controlled lathe semi-finish turning is conducted, wherein a reserved bearing block margin is 0.3-0.5mm; fifth, spline rolling is conducted, namely, a spline milling machine for a grinding hob is used for machining the spline width and the bottom diameter, the margin of 0.3-0.4mm is reserved; sixth, quenching (heating processing) is conducted, namely, high-frequency quenching is adopted at the spline position, the rigidity HR is 48-53, and the rigidity of the spline position is improved; seventh, external diameter grinding of a cylindrical grinding machine is conducted (drawing technical requirements are met as needed); eighth, spline grinding is conducted, namely, a molding gear grinding machine is adopted, and a grinding wheel is corrected; ninth, the spline size is detected. The high-precision rectangular spline shaft manufacturing process improves the precision of the spline shaft, and improves working efficiency.

Description

technical field [0001] The invention relates to a spline shaft manufacturing process, in particular to a high-precision rectangular spline shaft manufacturing process. Background technique [0002] At present, spline shafts generally adopt outer diameter positioning in China, which is characterized by simple manufacturing process and poor positioning accuracy. In foreign countries, bottom diameter positioning (inner positioning) is generally used, which has high precision and accurate positioning. With the continuous improvement of the level of the machine tool manufacturing industry, the precision requirements for the spline shaft are also getting higher and higher. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high-precision rectangular spline shaft manufacturing process as the level of the machine tool manufacturing industry continues to improve and the precision requirements for the spline shaft become hi...

Claims

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Application Information

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IPC IPC(8): B23P15/14
CPCB23P15/14F16C3/02
Inventor 蒋荣坤
Owner 常州市格里森前进齿轮有限公司
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