Quality control in manufacture of hydraulic cylinder rods for load–haul–dumpers

The article offers a review of wear causes of hydraulic cylinder rods and barrels for load–haul–dumpers and makes proposals on higher manufacturing quality control of these parts. The connection between the life of joint assemblies and the surface layer quality is emphasized for the parts of friction couples. The importance of the properly selected criteria for the machined surface quality is highlighted as this choice is decisive for the increase in wear resistance and, consequently, in endurance of parts in friction assemblies. In this respect, alongside with microprofile roughness and regularity of parts in friction assemblies, it is proposed to estimate profile roughness using the bearing ratio. The widely applied methods of final surface finish of friction couples are discussed and compared. The most efficient methods of surface finish for the parts of hydraulic cylinders are the methods of plastic deformation of their surface, in particular, diamond smoothening which possesses high technological capabilities in treatment of various hardness surfaces and features simple accessories. The characteristics of the method and the prospects for its application in surface machining of parts in combination with other techniques, including parts with functional thin film coatings, are described.

Sevagin S. V., Verzhansky A. P. Quality control in manufacture of hydraulic cylinder rods for load–haul–dumpers. MIAB. Mining Inf. Anal. Bull. 2021;(5):35-44. [In Russ]. DOI: 10.25018/0236_1493_2021_5_0_35.

S.V. Sevagin, Graduate Student, National University of Science and Technology «MISiS», 119049, Moscow, Russia, e-mail: sevaginsv@gmail.com,
A.P. Verzhansky, General Director, NP «Mining Industrialists of Russia», Moscow, Russia, e-mail: info@rosgorprom.com.

S.V. Sevagin, e-mail: sevaginsv@gmail.com.

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