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Machining Process of Piston Rod of Oil Cylinder

2022-01-11

The processing quality of the piston rod is required to be high, and the surface roughness is required to be Ra 0.4μm, and several other circular runouts also have higher position accuracy requirements. To determine the finishing plan, the piston rod processing is divided into five stages: rough turning (rough turning outer circle, end face and drilling center hole, etc.), finishing turning (finishing every outer circle, steps and secondary surfaces, etc.) ), rough grinding (coarse grinding around the outer circle), semi-precision grinding, and fine grinding. The production type of piston rods is batch production. The structure of the parts is generally complex, but there are higher technical requirements. The principle of process concentration can be used to arrange the machining process of the shaft. 

piston rod

Using machine tools and part of high-productivity equipment, equipped with fixtures, and part of the scribing method to achieve accuracy, in order to reduce the number of procedures, shorten the process route, and improve production efficiency. Adopting the principle of process concentration is helpful to ensure the position accuracy requirements between the processing surfaces, save the time of installing the workpiece, reduce the number of times the workpiece is moved, simplify the production plan and production organization, reduce the number of work fixtures, and shorten the auxiliary time . The production program of piston rods is mass production, so three gripping chucks, double and milling machine fixtures are used. The principle of determining the amount of cutting: Firstly, choose the largest possible amount of back-grabbing, and secondly, when the machine tool power and rigidity allow, and the surface roughness is satisfied, the largest possible feed amount should be selected. Then determine the optimal cutting speed according to the formula.

piston rod

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