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Improving the surface finish of hydraulic cylinder end plates

The transfer of power is one of the most important and demanding processes in modern machinery and more times than not it is achieved by utilising hydraulic cylinders. RDC Control in Quebec, Canada - a manufacturer of industrial hydraulic and pneumat

Choosing the RHBE
RDC’s cylinder plates are shot blasted to clean and improve the contact surface to ensure maximum adhesion to a layer of corrosion resistant paint. RDC had previously been using a subcontractor to air blast the end plates but Ariel Schtenbarg, director of engineering at the company, knew that “there was something better”. RDC wanted to find an in-house solution that was cost effective, efficient and could provide a uniform surface finish, which led them to contact Rösler Metal Finishing. After assessing the parts and desired finish, Rösler recommended an RHBE Spinner Hanger Shot Blast Machine. Rösler’s RHBE unit was a perfect fit for this project in which the parts could not be tumbled in bulk loads due to part-on-part contact, which causes nicks and surface damage. In this application the parts are mounted by hooks on a ‘Christmas tree’ style fixture in the blasting chamber. The simultaneous rotating and oscillating movement of the spindle ensures that the blasting media, accelerated by multiple turbines, reaches every component, providing the best possible uniform blasting result. This process allows RDC to efficiently process multiple parts at a time with a cycle time of two minutes, as opposed to air blasting the parts one at a time.

Machine Details
The RHBE manufactured for RDC has a blast cleaning zone that is approximately 90 x 130cm (diameter x height). The machine is equipped with two direct drive 5.6kw blast turbines, which use carbon steel cast shot to achieve the desired finish. Like all RHBEs, this unit came standard with a y-switch type overhead monorail system, which allows the operator to load and unload one fixture, while the other fixture with the parts is being processed in the machine.
Rösler GmbH is an international market leader in the production of surface finishing, shot blasting machines, painting systems and preservation lines, along with process technology for the rational surface finishing (deburring, descaling, sand removal, polishing, grinding, etc.) of metals and other components. In addition to the German plants in Untermerzbach and Bad Staffelstein, the Rösler Group has branches in the UK, France, Italy, The Netherlands, Belgium, Austria, Switzerland, Spain, Romania, Russia, Serbia, China, India, Brazil, South Africa and USA.

Mrs Barbara Müller, Rösler Oberflächentechnik GmbH, Vorstadt 1, 96190 Untermerzb