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A manufacturing method and triple gear technology, which is applied in the field of gear manufacturing, can solve the problems that the precision and roughness of the teeth are difficult to achieve the ideal state, the roughness of the tooth surface of the bevel teeth is poor, and the energy consumption is large, so as to save energy and materials, The effect of high product precision and stable product quality
Active Publication Date: 2017-08-08
HANDE AXLE (ZHUZHOU) GEAR CO LTD
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[0002] At present, triple gears are widely used in the automotive industry to realize axial connection and be used for automobile axles. The bevel teeth of the triple gears mesh with the planetary gears. The large end of the bevel gears is closed and cannot be processed by gear planing. , in the process of processing, precision forging is generally used, but due to the oxidation in the forging process, the surface roughness of the bevel tooth part is poor, and the precision of the tooth part is poor. Usually, the process adopts two-fire forging, forging and forming first, and then surface treatment Shot peening to clean the oxide skin, and then heating to about 800°C for warm forging. Due to the two heatings, the energy consumption is large, the production cycle is long, and the precision and roughness of the teeth are still difficult to achieve the ideal state.
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[0031] Refer to the above attached figure 1 A method for manufacturing a triple gear (the triple gear of the 425 bridge is an example), which is characterized in that the manufacturing method includes a blanking process, a heating process, an upsetting process, a pre-forging process, a final forging process, an anti-oxidation process, spraying Pill process, lubrication process, shaping process and inspection process; the specific manufacturing method is as follows:
[0032] A, the described blanking process: select the metal bar that meets the requirements, and draw the three-dimensional figure of the triple gear by CAD, obtain the volume of the triple gear by the CAD software, then multiply the weight of the triple gear by the metal bar density, The weight tolerance of the triple gear is obtained as ±0.5%; then the length of the metal bar is calculated based on the weight and density of the triple gear and the diameter of the metal bar; and then the material is cut according ...
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Abstract
The invention relates to a manufacturing method for a triple gear. The method comprises the steps that a metal rod is selected, the length of the rod is worked out according to the weight of the triple gear, the rod is put into a medium-frequency induction heating furnace and heated, the heating temperature ranges from 1,100 DEG C to 1,180 DEG C, then upsetting, pre-forging and final forging are conducted for forming, and descaling and oxidation prevention are included in the forming process; then shot blasting cleaning is conducted, and the surface of a workblank is coated with a lubricant; and the lubricated triple gear workblank is put into a finishing die, the cold reshaping process is conducted, normal-temperature reshaping is conducted on a conical tooth part of the triple gear, and the triple gear is formed. By the adoption of the manufacturing method, the operation is convenient, the quality of products is stable, the degree of finish of the tooth surface reaches over 1.6, the tooth portion accuracy reaches over the level 6 specified in the DIN standard through reshaping, no machining is needed for the conical tooth part, only one-time heating is needed, the production cycle is short, the efficiency is high, energy and materials are saved, the operation is convenient, and the product accuracy is high; and an existing manufacturing method of machining or multi-fire forging of the triple gear is changed thoroughly.
Description
technical field [0001] The invention relates to a method for manufacturing triple gears, belonging to the field of gear manufacturing. Background technique [0002] At present, triple gears are widely used in the automotive industry to realize axial connection and be used for automobile axles. The bevel teeth of the triple gears mesh with the planetary gears. The large end of the bevel gears is closed and cannot be processed by gear planing. , in the process of processing, precision forging is generally used, but due to the oxidation in the forging process, the surface roughness of the bevel tooth part is poor, and the precision of the tooth part is poor. Usually, the process adopts two-fire forging, forging and forming first, and then surface treatment Shot blasting cleans the scale, and then heats to about 800°C for warm forging. Due to the two heatings, the energy consumption is large, the production cycle is long, and the precision and roughness of the teeth are still di...
Claims
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