The model method and of Casting method working impeller of hydraulic cam and groove coupling

　　The model method of working impeller of hydraulic cam and groove coupling:

　　The model method of working impeller of hydraulic cam and groove coupling is that paper shell or thin iron model according to cycle round shape, takes the border edge measuring method, step by step, until the shear model basically and the circle of the same shape. This method is more trouble, but it is simple and practical, so with the more.

　　Casting method of working impeller of hydraulic cam and groove coupling:

　　Casting method of working impeller of hydraulic cam and groove coupling known as the "roll over", is to use paraffin wax, plaster, low melting point alloy, plastic mold material, adopt casting method, with an impeller cavity model out of a mold, and then turned out the model. Printed on paper work cavity shape, finally find out geometry graph drawn drawing impeller their. Casting method is one of the methods to survey more accurate and convenient, in practice often used.

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