Based On Electro-hydraulic Proportional Control Of The Milling Feed Rate Control System Design And Research

Hydraulic control and transmission technology has become an important technology of industrial automatism, and it is the key component of mechanic-electronic. The electro-hydraulic control is one of the most vivid branches of this technology. Proportional unit do not need a high requirement of the clearness of media but rather than cheaper, and the static and dynamic responding supplied can meet the using requirements in most industrial fields, and in some fields is no worse than servo valves. The Proportional control technology has a broad prospect in industrial application. However, at present the constructing of closed loop control system using proportional electro-hydraulic control valve is not very frequent in engineering applications. Because its designing theory is not very satisfied by normal use, and it needed to research further . So, the research to this proportional closed loop control system has an important theory value and application meaning.This paper takes Tin earphone, which is the main equipment in Copper electric-anode automatic product line, as research object. Based on the analysis of each composites of Tin , earphone device, it analysis first the key part Milling tool's geometrical parameters, structure and manufacturing abilities. And an experiment is also taken. With the electro-hydraulic proportional directional restricting flowing valve, pressure-reducing valve, DC line speed measuring sensor etc, the electro-hydraulic proportional closed loop speed control system is designed, and the speed of the longitude feeding equipments of Tin earphone can be controlled, This paper analyzes the compositing usage of several hydraulic valve thoroughly, construct with emphasis the mathematic model of electro-hydraulic proportional closed loop speed control system with pressure difference compensation. Using the computer engineering software, it analyzes the system and its component's static and dynamic performance, and designs a reasonable corrector , so that the performance of the system designed can fit the application producing requirements better.