Improving the Process of Gear Honing Defects in Automotive Gears
Abstract This paper first compares the process differences in gear honing for two MQ series automotive transmission gears. It then […]
Scientific
gear defect
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Analysis of Gear Heat Treatment Defects
The gears installed in the transmission, reducer and differential undertake the tasks of changing speed, output torque and driving the […]
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Heat treatment defects and technical improvement of tractor gears
Shanghai Tractor internal combustion engine Co., Ltd. studied the spline hole distortion of xf-125 primary transmission gear, carried out tests […]
Scientific
Common heat treatment defects of gears and their prevention methods
1. Cracks 1) In the carburizing diffusion stage, the carbon potential is high, the carburizing layer carbon concentration is too […]
Scientific
Defects of gear heat treatment and its influence
Whether carburizing quenching, carbonitriding quenching, induction heating quenching or overall heating quenching, the possible heat treatment defects during gear quenching […]
Scientific
Defects of gear heat treatment and its influence
Various defects produced during heat treatment of gears will have potential or obvious adverse effects on their quality and service […]
Scientific
Insufficient hardness of gear core
The center of carburized gear is required to have a certain hardness. When the hardness is low, the yield point […]
Scientific
The hardened layer of gear is too shallow
The surface hardness of carburized gear is too shallow, which not only reduces the anti peeling performance of surface hardened […]
Scientific
Causes and preventive measures of metallographic structure and heat treatment defects of rear axle gear
1. Defect content Including coarse martensite, excessive retained austenite as shown in figure (a), excessive surface carbides as shown in […]
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Defects of gear heat treatment and technical improvement scheme
Gear heat treatment deformation is affected by many aspects, such as part shape, raw materials, forging and preliminary heat treatment, […]
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Defects of gear heat treatment and examples of technical improvement
The problem of spline hole distortion of xf-125 primary transmission gear by China First Tractor internal combustion engine company is […]
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Defects and technical improvement of gear heat treatment
The deformation of gear heat treatment is very complex, which is a comprehensive reflection of the factors affecting the deformation […]
Scientific
Causes and preventive measures of hardened layer, hardness and heat treatment defects of rear axle gear
1. Defect content Including unreasonable distribution of hardened layer, heat treatment defects, surface hardness too high or too low heat […]
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Formation mechanism of micro pitting corrosion of gears
In the process of gear transmission, the maximum shear stress caused by repeated rolling sliding contact leads to the plastic […]
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Production process and defect detection method of gear hub blank
Production process of gear hub blank Electric furnace smelting → die casting → forging → annealing → peeling → ultrasonic […]
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There is a high probability of gear pitting failure
When the gear system has tooth profile error, tooth surface roughness is too high, the lubricating oil film is too […]
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The fatigue pitting of gears is caused by insufficient contact fatigue strength
Gear box is the most commonly used power and motion transmission device in mechanical equipment. Gear transmission has many advantages […]
Scientific
Optimization and improvement of thin-walled gear for mechanical transmission mechanism of airlock in nuclear power plant
According to the above analysis, in order to thoroughly solve the undercut fracture accident of thin-walled gear and ensure the […]
Scientific
Failure analysis of thin-walled gear used for mechanical transmission mechanism of airlock in nuclear power plant
According to the failure mechanism analysis of thin-walled gear, the gear material is 40Mn2. In the process of gear meshing, […]
Scientific
Failure mechanism analysis of broken teeth of thin-walled gear used in mechanical transmission mechanism of airlock in nuclear power plant
It is found that the broken tooth thin-walled gear is a 2 ″ straight cylindrical gear with 12 teeth, which […]
Scientific
Failure analysis of thin-walled gear for mechanical transmission mechanism of airlock in nuclear power plant
The gas gate of nuclear power plant runs through the inner and outer containment of reactor. Because of its complex […]
Scientific
Welding repair technology for defects of cast steel gears
The welding repair process is suitable for repairing casting defects such as pores, sand holes, slag inclusions, cracks (cold and […]
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Possible defects in heat treatment of bevel gears and preventive measures
The possible defects in the heat treatment of 20CrMnTi spiral bevel gear are as follows: 1. Uneven depth of carburized […]
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Gear defect – tooth surface defect
1.Tear Main cause 1) Uneven material of gear blank 2) Improper heat treatment of gear blank 3) Chip accretion due […]
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Common faults of gears – wear and gluing
1.Wear The wear of tooth surface is caused by metal particles, dust and sand entering into the working surface of […]
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Common faults of gears – pitting
Pitting is a common damage form of closed gear transmission, which usually occurs on the tooth root surface near the […]
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Common faults of gears – broken teeth
Tooth breakage is the most common fault of gear. The fracture of gear teeth usually occurs at the root of […]
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Effective measures to solve carburizing defects of gears
(1) Strengthen the gear cleaning before carburizing Generally, the material for making gear is metal material. In order to prevent […]
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Related tests and causes of gear white spot defects
(1) Introduction to various tests It is difficult to distinguish the white spot defects of gears by naked eyes. It […]
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Characteristics, causes and preventive measures of gear rim and plate crack
Feature: flange crack usually occurs at the root between two adjacent teeth. Some of the web cracks are caused by […]
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Graphic analysis of gear impact damage
Impact defects are generally caused by heavy loads caused by rough handling. It usually occurs at or near the root […]
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Gear defect – accumulated false closing error of pitch out of tolerance
Main cause The maximum error of uneven rotation in each rotation of the gear hobbing machine table is too large: […]
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Characteristics, causes and preventive measures of gear fatigue crack
Features: the stress is repeated alternation; the crack source is usually the stress concentration on the surface of gear, such […]
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Graphic analysis of gear fatigue
Fatigue is usually caused by repeated and excessive load, which is often broken at or near the root of gear. […]
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Gear defect – tooth direction error out of tolerance
Main cause The deviation between the vertical feed direction of hob and the axis direction of inner hole of gear […]
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Gear corrugation, arris and cold deformation
The corrugation, arris and cold deformation of gears are less, and the damage seems less. They show a surface state […]
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Gear defect – ring gear runout out out of tolerance
Main cause The center of the inner hole of the workpiece does not coincide with the turning center of the […]
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The gears produce pitting, peeling and the carburized layer is broken
The pitting point is a kind of fatigue defect, which occurs when small particles on the gear fall off from […]
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Gear defect – incorrect number of teeth
Main cause 1) Incorrect adjustment of split exchange gear 2) Wrong selection of hob 3) Incorrect workpiece blank size 4) […]
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Specific analysis of gear wear
Wear is the removal of surface material from gears. It can be slow, like a scratch, or quick, like a […]
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Gear defect – abnormal tooth profile
1.Edge of tooth surface Main cause The profile error of hob is too large or the tooth splitting is powerless. […]