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Processing process of internal spline gear blank used in agricultural machinery equipment transmission case

A processing technology and internal spline technology, which is applied to the processing technology field of internal spline gear blanks, can solve the problems of reduced processing efficiency, low processing efficiency, unqualified materials, etc., to improve product quality and precision, and high processing efficiency. , The effect of low processing cost

Inactive Publication Date: 2014-04-09
平湖市海光机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The precision of the spline in the gear directly affects the manufacturing precision and assembly precision of the gear, thus affecting the precision of the entire transmission device
At present, the processing technology of the internal spline gear blank used in the transmission box of agricultural machinery equipment is as follows, which are blanking, forging, normalizing, rough turning, spline pulling and finishing turning, and after subsequent gear hobbing or gear shaping, gear shaving The internal spline gear is made by heat treatment. The quality of the internal spline is closely related to the chemical composition of the material, the weight of the blank, the heating method of the blank, and the quality of normalizing. Poor quality, the coal furnace heating method produces more scale, the hardness of normalizing is uneven, and the broaching spline method of horizontal broaching machine between rough turning and finishing turning has the influence of the workpiece's own weight, which will reduce the spline in the gear. Manufacturing accuracy, while rough turning and finishing turning are processed in two processes, which also increases manufacturing costs and reduces processing efficiency
The processing of the internal spline gear blank used in the transmission box of the existing agricultural machinery equipment has high manufacturing cost, low processing efficiency, and low precision of the processed internal spline gear blank, which is not conducive to the subsequent gear hobbing, shaving and heat treatment. processing

Method used

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  • Processing process of internal spline gear blank used in agricultural machinery equipment transmission case
  • Processing process of internal spline gear blank used in agricultural machinery equipment transmission case

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The processing technology of the internal spline gear tooth blank used in the transmission box of agricultural machinery equipment includes the following steps in sequence:

[0016] (1) Material selection, select materials with the following chemical composition according to mass percentage: C, 0.17%; Si, 0.17%; Mn, 0.80%; Cr, 1.00%; Ti, 0.04%; Ni, 0.02%; S, 0.025 %; P, 0.025%; the balance is Fe and unavoidable impurities, Fe is not less than 95%;

[0017] (2) Cutting by cutting machine, the weight tolerance is controlled as diameter d≤50㎜, tolerance is ±0.01㎏; diameter is 55㎜65㎜, The tolerance is +0.03㎏~-0.01㎏;

[0018] (3) Blank forging, the raw material is placed in an intermediate frequency heating furnace for 5-10 seconds and the temperature is 1000-1200°C. After upsetting, forging, and edge trimming, the turning allowance on one side of the blank is controlled to be 0.8-1.2 mm;

[0019] (4) Isothermal normalizing, heating the blank at a temperature of 925-945°C,...

Embodiment 2

[0023] The processing technology of the internal spline gear tooth blank used in the transmission box of agricultural machinery equipment is the same as that of Example 1, the only difference is that the material selection is different, and the material with the following chemical composition is selected according to the mass percentage: C, 0.23%; Si, 0.37% %; Mn, 1.10%; Cr, 1.3%; Ti, 1%; Ni, 0.03%; S, 0.03%; P, 0.03%; the balance is Fe and inevitable impurities, Fe not less than 95%.

Embodiment 3

[0025] The processing technology of the internal spline gear tooth blank used in the transmission box of agricultural machinery equipment is the same as that of Example 1, the only difference is that the material selection is different, and the material with the following chemical composition is selected according to the mass percentage: C, 0.2%; Si, 0.3 %; Mn, 1%; Cr, 1.1%; Ti, 0.6%; Ni, 0.02%; S, 0.02%; P, 0.02%;

[0026] The performance data comparison table of the internal spline gear tooth blank used in the transmission box of agricultural machinery equipment made by the process of the above three embodiments and the internal spline gear tooth blank used in the transmission box of agricultural machinery equipment made by the existing technology as follows.

[0027]

[0028]

[0029] It can be seen from the above table that the precision of the rough-finish turning and internal spline drawing process of this patent is obviously better than the traditional process of ...

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Abstract

The invention relates to a gear processing process. A processing process of an internal spline gear blank used in an agricultural machinery equipment transmission case comprises the steps of selecting material, blanking by a material shearer, forging blanks, isothermally normalizing, coarsely finish turning and pulling an internal spline in sequence. The processing process of the internal spline gear blank used in the agricultural machinery equipment transmission case has the advantages of being higher in processing efficiency, lower in processing cost and capable of comprehensively improving quality and precision of product of the internal spline gear blank.

Description

technical field [0001] The invention relates to a gear processing technology, in particular to a processing technology of an internal spline gear blank used in a transmission box of agricultural machinery equipment. Background technique [0002] At present, internal spline gears are widely used in gear transmission, especially in transmission boxes of agricultural machinery equipment such as tractors, harvesters, and rotary tillers. The precision of the spline in the gear directly affects the manufacturing precision and assembly precision of the gear, thus affecting the precision of the whole transmission device. At present, the processing technology of the internal spline gear blank used in the transmission box of agricultural machinery equipment is as follows, which are blanking, forging, normalizing, rough turning, spline pulling and finishing turning, and after subsequent gear hobbing or gear shaping, gear shaving The internal spline gear is made by heat treatment. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 洪新阳张信伟黄伟祥洪铭
Owner 平湖市海光机械有限公司
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