Selecting method of primary positioning reference of engine connecting rod

Abstract

The invention discloses a selecting method of a primary positioning reference of an engine connecting rod. The method comprises the following steps of firstly, selecting the upper end surfaces and the lower end surfaces of head holes as first positioning references, and respectively selecting a small head hole and the outer side as a second positioning reference and a third positioning reference; roughly grinding the upper end surfaces and the lower end surfaces, adopting a mutual reference method to process, and meanwhile during drilling and rough boring of the small head hole, selecting the end surfaces of the small head hole and the contour of a small head as reference surfaces; during finishing operation, adopting a uniform reference method to process, processing the small head hole by taking the end surfaces of a large head hole and the small head hole and the outer side surface of a large head as the uniform precise references, and grinding the upper end surface and the lower surface of the small head hole by taking the upper end surface and the lower surface of the small head hole as the precise references; and selecting the size, direction and action points of clamping force, wherein the direction of the clamping force faces the main positioning surface and the end surfaces of the large head and the small head. The method has the beneficial effects that the stability and easy speed adjusting in the linear movement are realized, the running precision of a machine is favorably improved, and the service life of the machine is prolonged; and meanwhile, the convenient and flexible arrangement is favorably realized according to requirements, the operation controllability is improved, and the labor strength is reduced.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a method for selecting a preliminary positioning reference of an engine connecting rod. Background technique [0002] Hydraulic technology is one of the key technologies to realize modern transmission and control. Due to light weight and small size, various components of hydraulic transmission can be conveniently and flexibly arranged according to needs. Combining with the latest technology, it has a high degree of automation and is easy to operate and control. It is easy to realize linear motion and a wide range of stepless speed regulation. To achieve overload protection, mineral oil is used as the working medium, which can be self-lubricated relative to the moving surface and has a long service life. In recent years, hydraulic pneumatic technology is facing competition with mechanical transmission and electric transmission. For example, CNC machine tools and small and medi...

AI Technical Summary

Problems solved by technology

In recent years, hydraulic pneumatic technology is facing competition with mechanical transmission and electric transmission. For example, CNC machine tools and small and medium-sized plastic machines have replaced or partially replaced hydraulic transmission with electronically controlled servo systems; the main reason is that hydraulic technology has leakage and poor maintainability. Disadvantages; for this reason, efforts must be made to give full play to the advantages of hydraulic pneumatic technology, pay attention to the combination with electronic technology, and continuously expand the application field, while reducing energy consumption, improving efficiency, adapting to environmental protection needs, and improving reliability. These are the continued efforts of hydraulic pneumatic technology The goal is also the key to the success of hydraulic and pneumatic products in market competition

However, the existing hydraulic system components of this product have many problems from different perspectives such as operation methods, working methods, and complicated structures, which lead to inefficient work, heavy equipment weight, and high costs