Decreasing the distortion of cylindrical gear wheels during heat treatment

Based on the MASTA cylindrical gear manufacturing module, the hobbing process and heat treatment of automotive transmission gear were simulated. The simulation results show that the hobbing process has a lot of excellent process characteristics, such as good adaptability, continuous cutting, no extra stroke, higher productivity. By the MASTA software simulation the maximum value of the gear heat treatment deformation is about 70 um. The trend of thermal deformation first increases, then decreases, and then increases.

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THE STATIC ANALYSIS OF ENGAGEMENT OF CYLINDRICAL GEAR WHEELS.

Theoretical & Applied Science ◽

10.15863/tas.2021.03.95.56 ◽

2021 ◽

Vol 95 (03) ◽

pp. 366-374

Author(s):

Denis Chemezov ◽

◽

Semen Galaktionov ◽

Maksim Perov ◽

Petr German ◽

...

Keyword(s):

Static Analysis ◽

Cylindrical Gear ◽

Gear Wheels

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PROCESSING OF HARDENED CYLINDRICAL GEAR WHEELS OF THE CUTTING GEARBOX OF THE COMBINE UKD 200-500

Cutting & Tools in Technological System ◽

10.20998/2078-7405.2021.95.07 ◽

2021 ◽

pp. 57-70

Author(s):

Oleksandr Koval'chuk ◽

Volodymyr Nezhebovs'kyj ◽

Alexander Permyakov ◽

Alexander Klochko ◽

Serhii Riabchenko

Keyword(s):

Coal Mining ◽

Lower Boundary ◽

Cylindrical Gear ◽

Gear Teeth ◽

Cylindrical Gears ◽

Boundary Points ◽

Gear Grinding ◽

Gear Wheels ◽

Technological Methods

The article discusses the latest developments of unique technological methods of gear milling of cylindrical gears for preliminary blade gear processing of hardened cylindrical gears of the cutting reducer of the UKD200-500 coal mining harvester for the final gear grinding of gear teeth with modulus m = 16 mm, with hardness HRC 56 ... 62. The peculiarity of the design of special hob cutters is that a circle passing through the lower boundary points of the involute is used as the palloid of the machine gearing of the tool and part. Pre-cutting the teeth of hardened wheels with carbide milling cutters allows you to remove the main allowance for the final gear grinding.

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Induction Heating of Gear Wheels in Consecutive Contour Hardening Process

Energies ◽

10.3390/en14133885 ◽

2021 ◽

Vol 14 (13) ◽

pp. 3885

Author(s):

Jerzy Barglik ◽

Adrian Smagór ◽

Albert Smalcerz ◽

Debela Geneti Desisa

Keyword(s):

Heat Treatment ◽

Induction Heating ◽

Temperature Fields ◽

High Tech ◽

Total Efficiency ◽

Critical Temperatures ◽

Hardening Process ◽

Conventional Heat Treatment ◽

Non Linear ◽

Gear Wheels

Induction contour hardening of gear wheels belongs to effective heat treatment technologies especially recommended for high-tech applications in machinery, automotive and aerospace industries. In comparison with long term, energy consuming conventional heat treatment (carburizing and consequent quenching), its main positive features are characterized by high total efficiency, short duration and relatively low energy consumption. However, modeling of the process is relatively complicated. The numerical model should contain both multi-physic and non-linear formulation of the problem. The paper concentrates on the modeling of rapid induction heating being the first stage of the contour induction hardening process which is the time consuming part of the computations. It is taken into consideration that critical temperatures and consequently the hardening temperature are dependent on the velocity of the induction heating. Numerical modeling of coupled non-linear electromagnetic and temperature fields are shortly presented. Investigations are provided for gear wheels made of a special quality steel AISI 300M. In order to evaluate the accuracy of the proposed approach, exemplary computations of the full induction contour hardening process are provided. The exemplary results are compared with the measurements and a satisfactory accordance between them is achieved.

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The Selected Measurement Problems in the Aspect of the Non-Destructive Testing of the Gear Wheels and the other Parts

Advances in Materials Science ◽

10.2478/adms-2014-0025 ◽

2014 ◽

Vol 14 (4) ◽

pp. 92-101

Author(s):

S. Jończyk ◽

T. Babul ◽

S. Włodarczyk

Keyword(s):

Heat Treatment ◽

The Other ◽

Non Destructive Testing ◽

Surface Layers ◽

Destructive Testing ◽

Stress Changes ◽

Different Depths ◽

Gear Wheels ◽

Local Defects ◽

Non Destructive

Abstract This paper presents an overview of the results of studies which, in addition to the detection of differences in the structure of the product and the thickness of the surface layers, aimed to diversify the signal from the stress changes caused by cracks, assess local defects in the microstructure deformed by heat treatment and detect hydrogen „in statu nascendi”. Measurements were performed using Wirotest 1000. Specialized probes were used to allow measurements on surfaces difficult to reach. Measurements were taken at different depths of penetration. Assessment of the correlation of eddy current measurements and microhardness was also performed.

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