Piston circularity testing apparatus and component thereof

Abstract

The invention discloses a piston circularity testing apparatus which comprises a dial indicator and a clamping component. The clamping component comprises a base, a left installation device, a right installation device, an upper thimble and a lower thimble. The left installation device and the right installation device are arranged at the left end and the right end of the base respectively in a sliding cooperation manner; and the left installation device and the right installation device can slide left and right on the base. The dial indicator is arranged on the left installation device. The upper thimble is arranged above the lower thimble. The upper thimble and the lower thimble are arranged on the right installation device; the sharp part of the upper thimble, the sharp part of the lower thimble and the measuring head of the dial indicator are arranged opposite to each other. The invention also discloses a piston circularity testing component. According to the invention, high testing accuracy can be achieved without manual holding for measurement. The measuring position can be selected widely to achieve the simultaneous measurement of the circularity at the skirt part and the top of the piston.

Description

technical field [0001] The invention relates to the technical field of piston roundness testing, in particular to a piston roundness testing device and components thereof. Background technique [0002] The accuracy of the roundness of the piston directly affects the assembly effect with the cylinder head. The test method for measuring the roundness of the piston in the prior art is mainly realized by a vernier caliper test. Specifically, it includes the following steps: (1) The inspector holds the piston, uses a vernier caliper to test the diameter of a certain position on the top of the piston, then rotates the piston at a certain angle, and then uses the vernier caliper to test the diameter of the next position on the top of the piston. Finally, compare and analyze the roundness of the top of the piston. (2) Use a vernier caliper to test the diameter of a certain position of the piston group, then rotate the piston at a certain angle, and then use a vernier caliper to te...

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Problems solved by technology

[0003] The above method has the following disadvantages: (1) manual clamping of the piston can easily cause soreness in the inspector's arm and affect the work effect; (2) the inspector usually uses a vernier caliper to test the distance between two points on the piston as the diameter of the position There is a certain error in the judgment, and the two points may not be on the same straight line as the center of the piston; (3) The roundness of the piston skirt and top are measured separately, and the measurement process is cumbersome and time-consuming

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