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Coal mining machine transmission shaft with modified surface and machining method

A processing method and transmission shaft technology, applied in the field of mechanical parts manufacturing, can solve the problem that the service life and wear resistance cannot meet the normal use requirements, increase the volume and weight of the overall production line of the shearer, and the poor bonding performance between the plating layer and the substrate, etc. problems, to extend the maintenance interval and service life, reduce the use and maintenance costs, and improve the surface performance.

Pending Publication Date: 2022-06-24
山东海纳智能装备科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, reducing the surface stress of the drive shaft by increasing the size of the drive shaft will increase the volume and weight of the overall production line of the shearer, which is not very economical and feasible for the shearer with strict requirements on the overall structure and size; A wide range of surface treatment methods is surface chrome plating to improve the wear resistance and corrosion resistance of the surface of transmission shafts and other parts. However, the bonding performance between the plating layer and the substrate prepared by this method is poor at present, and peeling and bulging are prone to occur during use. , the service life and wear resistance still cannot meet the normal use requirements, and its effective service life is only 1-2 years

Method used

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  • Coal mining machine transmission shaft with modified surface and machining method

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Embodiment 1

[0029] Embodiment 1: The processing method of the shearer drive shaft with modified surface according to the present invention, the base material of the shearer drive shaft is 40CrMn medium carbon alloy steel. After quenching, high temperature tempering and rough machining of the transmission shaft parts, the Cr / C / Fe bonding layer and CrC / Cr working layer are prepared on the surface of the parts by the laser cladding method, and then the stress relief tempering and semi-finishing are carried out. and finishing.

[0030] Specifically include the following steps:

[0031] (1) Machining of transmission shaft: base blank of transmission shaft parts → quenching (810 ~ 920 ℃, water cooling) → high temperature tempering (550 ~ 600 ℃, water cooling) → rough machining (surface roughness Ra25μm, processing size to the lower limit of tolerance) ;

[0032] (2) Parts surface pretreatment: remove oil stains and oxide film on the surface of parts, and dry them;

[0033] (3) Configuration ...

Embodiment 2

[0040] Embodiment 2: The processing method of the shearer drive shaft with modified surface according to the present invention, the base material of the shearer drive shaft is 35CrMo medium carbon alloy steel. After quenching, high temperature tempering and rough machining of the transmission shaft parts, the Cr / C / Fe bonding layer and CrC / Cr working layer are prepared on the surface of the parts by laser cladding, and then the stress relief tempering and semi-finishing are carried out. Machining and finishing.

[0041] Specifically include the following steps:

[0042] (1) Machining of transmission shaft: base blank of transmission shaft parts → quenching (830-860 ℃, water cooling) → high temperature tempering (505-550 ℃, oil cooling) → rough machining (surface roughness Ra12.5μm, processing size: lower tolerance limit);

[0043] (2) Parts surface pretreatment: remove oil stains and oxide film on the surface of parts, and dry them;

[0044] (3) Configuration of Cr / C / Fe comp...

Embodiment 3

[0050] Embodiment 3: The processing method of the shearer drive shaft with modified surface according to the present invention, the base material of the shearer drive shaft is 35CrMo medium carbon alloy steel. After quenching, high temperature tempering and rough machining of the transmission shaft parts, the Cr / C / Fe bonding layer and CrC / Cr working layer are prepared on the surface of the parts by laser cladding, and then the stress relief tempering and semi-finishing are carried out. Machining and finishing.

[0051] Specifically include the following steps:

[0052] (1) Transmission shaft machining: transmission shaft parts base blank→quenching (850-890℃, water cooling)→high temperature tempering (525-560℃, oil cooling)→roughing (surface roughness Ra6.3μm, processing size: lower tolerance limit);

[0053] (2) Parts surface pretreatment: remove oil stains and oxide film on the surface of parts, and dry them;

[0054] (3) Configuration of Cr / C / Fe composite powder: the comp...

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Abstract

The invention relates to a coal cutter transmission shaft with a modified surface, which comprises a shaft body, a Cr / C / Fe bonding layer prepared on the surface of the shaft body by adopting a laser cladding method, a CrC / Cr working layer prepared on the surface of the Cr / C / Fe bonding layer by adopting the laser cladding method, and the Cr / C / Fe bonding layer comprises the following components in percentage by mass: 25-30% of C, 35-40% of Cr and 30-40% of Fe. And the CrC / Cr working layer comprises the following components in percentage by mass: 20-30% of Cr and 70-80% of CrC. The invention further provides a machining method of the coal cutter transmission shaft with the modified surface. Compared with the prior art, the invention has the following beneficial effects: the surface performance of the transmission shaft of the coal mining machine can be obviously improved, the wear resistance and corrosion resistance of transmission shaft parts are improved, the service life of the transmission shaft of the coal mining machine is effectively prolonged, the maintenance period and service life of the whole machine are prolonged, and the use and maintenance cost of the coal mining machine is reduced.

Description

technical field [0001] The invention relates to a shearer drive shaft with a modified surface and a processing method, and belongs to the technical field of mechanical parts manufacturing. Background technique [0002] The shearer is one of the important equipments to realize the mechanization and modernization of coal mine production. In the process of coal mining, the working mechanism of the shearer breaks the coal from the coal body (coal breaking) and loads it into the working face conveyor (coal loading), and the shearer walks at the set traction speed (traction). , so that the coal breaking and coal charging process can be carried out continuously. The shearer can reduce the physical labor of workers in the process of coal mining, improve work safety, and achieve the purpose of high output, high efficiency and low consumption. The shearer is a large and complex system integrating machinery, electricity and hydraulics. The working environment is harsh (high humidity,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C21D1/18B22F1/054B22F1/12
CPCC23C24/106C23C24/103C21D1/18
Inventor 宋文龙孙凯朱凯朱龙陈超陈家川姚洪祥刘福朋
Owner 山东海纳智能装备科技股份有限公司