Open AccessImproving the quality of crane wheels machining
Author(s) -
А. А. Шубин,
А. Е. Смоловик,
Natal'ya Vitchuk
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/560/1/012160
Subject(s) - thermocouple , machining , dependability , mechanical engineering , process (computing) , shear (geology) , quality (philosophy) , automotive engineering , structural engineering , computer science , engineering , materials science , composite material , philosophy , software engineering , epistemology , operating system
One of the most common types of damage to cranes is wear of the working surface and/or the ribs of the running wheel. When the maximum permissible wear is reached, the wheel is machined to restore its geometry. During production and repair of running wheels of load-lifting cranes, the problem of increasing the efficiency of the technological machining process on the rolling profile of the running wheels is a component of the general problem of increasing dependability of hoisting and transport machines. The technological process of restoring the profile of the surface of the crane wheels has a number of features. If the change in the depth of the cut can be estimated and then during processing to adjust the modes, then to measure and consider the hardness of the material to be removed are practically impossible. The lack of proper control over the change in the depth of the cut and the hardness of the treated surface often leads to the fact that the crane wheels turn in the understated modes, which adversely affects the performance. This causes the expediency of regulating the process according to such criterion as the optimal cutting temperature. The article describes the methods of experimental determination of the optimal cutting temperature. A new method of determination based on shear thermocouples is proposed. The authors obtained and compared dependences for thermo - EMF, corresponding to the optimum temperature, on the cutting speed, obtained with the help of shear and natural thermocouples.