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Process for machining chain pit on tooth part of sprocket

A processing technology, sprocket tooth technology, applied in the field of sprocket socket processing technology, can solve the problems of low wear resistance, high wear resistance, frequent sprocket replacement, etc., to achieve enhanced wear resistance, fusion good sex effect

Inactive Publication Date: 2011-11-23
滁州市江淮机械电子设备制造有限公司
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Problems solved by technology

[0003] In the traditional production process, the material is 40Cr or 42CrMo, the forging blank is processed by turning and planing, and the gear teeth are processed by a special milling machine, and then quenched and tempered. The hardness is HB280-320. HRC50~55, although the chain socket of the sprocket tooth part processed by this process has a certain hardness and good mechanical properties, its wear resistance is low, and it cannot meet the requirements of high wear resistance. The volume is only 2.6 million tons, and the sprockets are frequently replaced due to wear

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  • Process for machining chain pit on tooth part of sprocket
  • Process for machining chain pit on tooth part of sprocket

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Embodiment Construction

[0022] Such as figure 1 , 2 , Shown in 3, the present invention is 100mm as an example with the maximum section thickness of sprocket wheel, and the processing technology of tooth portion chain pocket is:

[0023] The sprocket is quenched and tempered, the quenching temperature is 860°C, and the duration is 120 minutes. The cooling medium is mineral oil, and the high temperature tempering temperature is 600°C, and the duration is 120 minutes. Process the chain pocket 2 to the designed size, and drill holes on the plane of the chain pocket 2. The diameter of the drilled hole 3 is 22mm slightly smaller than the width of the chain pocket, and the depth of the drilled hole is 10mm. The tooth part 1 is quenched by intermediate frequency, the frequency is 8000Hz, the heating temperature is 900°C, the depth of the hardened layer is 8mm, and then it is rapidly cooled in the emulsion. The entire sprocket is tempered at a low temperature again, the tempering temperature is 200° C., an...

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Abstract

The invention relates to a process for machining a chain pit on the tooth part of a sprocket. The process comprises the following steps of: tempering the sprocket, and machining the chain pit on the tooth part to a design size; scoring and drilling on a plane of the chain pit on the tooth part; quenching the tooth part; tempering the sprocket at low temperature; overlaying in a drill hole by using a welding rod; and grinding the drill hole until the drill hole is consistent with the height of the plane of the chain pit. In the process, the hardness at the overlaying position is more than that at other positions of the chain pit, and the fusion of welding materials at the overlaying position and parent metal of the sprocket is high, and thus, the wear-resisting property of the chain pit is enhanced.

Description

technical field [0001] The invention relates to a process for processing a chain socket of a sprocket wheel, in particular to a process for processing a chain socket of a sprocket tooth part used in coal mines. Background technique [0002] The sprocket shaft assembly is an important part of the coal mine scraper conveyor or down-hole transfer machine. The sprocket is the key part of the sprocket shaft group. It is installed on the head frame of the scraper conveyor in the coal mining face and connected with the reducer. The scraper chain on the sprocket shaft group is driven by the reducer to run in the middle hole of the conveyor to transport raw coal, realizing the mechanization of coal mining face transportation. [0003] In the traditional production process, the material is 40Cr or 42CrMo, the forging blank is processed by turning and planing, and the gear teeth are processed by a special milling machine, and then quenched and tempered. The hardness is HB280-320. HRC5...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
Inventor 陈云端王元长吴学俭
Owner 滁州市江淮机械电子设备制造有限公司
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