Piston processing method

Abstract

The invention discloses a piston processing method which comprises the following steps of material selecting and smelting; pouring; thermal treatment; metal processing: carrying out neck ring turning, pinhole base hole processing and oil coating in sequence, wherein a neck ring turning device is adopted to carry out neck ring turning on a piston, a pinhole base hole processing device is adopted to carry out pinhole base hole drilling on the piston, and an automatic oil coating mechanism is adopted to carry out oil coating on the piston; and roundness test: adopting a piston roundness test device to test surface roundness of the piston. The piston processing method disclosed by the invention has the advantage of being high in strength and modulus, stable and precise in neck ring turning, stable in clamping, uniform in oil coating, high in oil coating efficiency, free of manual handheld measuring and wide in measuring position selectivity, and being capable of reducing tool abrasion, avoiding occurrence of oval holes during drilling, improving product quality, reducing a rejection rate and realizing simultaneously measuring roundness of the skirt part and the top part of the piston.

Description

technical field [0001] The invention relates to the technical field of pistons, in particular to a piston processing method. Background technique [0002] The piston can be mainly divided into three parts: the piston crown, the piston head and the piston skirt. The main function of the piston is to withstand the combustion pressure in the cylinder and transmit this force to the crankshaft through the piston pin and connecting rod. [0003] The top of the piston is an integral part of the combustion chamber, so it is often made into different shapes. The top of the gasoline engine piston is mostly flat or concave, so that the structure of the combustion chamber is compact, the heat dissipation area is small, and the manufacturing process is simple. The piston head is the part above the piston pin seat. Piston rings are installed on the piston head to prevent high-temperature and high-pressure gas from entering the crankcase and prevent engine oil from entering the combustion...

AI Technical Summary

Problems solved by technology

[0009] The above-mentioned artificial oiling has the following disadvantages: (1) the uniformity of oiling is not easy to control; (2) the work efficiency is low, not only time-consuming, but also labor-intensive; During the process, the lubricating oil is easy to drip on the staff, which is inconvenient for later cleaning; (4) When one side of the piston is coated with lubricating oil, the staff needs to hold the side of the piston that is coated with lubricating oil. The other side of the piston is then oiled; from this, there may be problems with less stable grip due to less grip friction

[0012] 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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