Since the reform and opening up, actively introduce, digest,absorb advanced foreign technology, in order to promote the development of China's excavator industry. TheGuiyang mining machinery factory, Shanghaiconstruction machinery factory, Hefei mining machinery factory,Changjiang excavator factory were introduced from Germany Liebherr (Liebherr), A912, R912, R942, A922,R922, R962, R972, R982 type hydraulicexcavator manufacturing technology. A few years later, the Hangzhouheavy machinery factory the introduction of GermanyDemark (Demag) production technology of H55 and H85 type hydraulic excavator company, Beijingconstruction machinery factory the introduction of Germany Ogake(0&K) RH6 and MH6 type hydraulic excavator companymanufacturing technology. At the same time, there areShandong Bulldozer General Factory, the Yellow River engineering machinery plant, Jiangxi Changlin machinery factory, Shandong Linyi construction machinery factoryjoint introduced Japan Komatsu produced by PC100,PC120, PC200, PC220,PC300, PC400 type hydraulic excavator (except engine) of the full set of manufacturing technology. The plantthrough the introduction of technology a few years of digestion and absorption,transplantation, theperformance of domestic hydraulic excavator products up to twentieth Century 80'sinternational levelcomprehensive, production hasincreased year by year. Because of the demand of the hydraulic excavator is increasing and diverse, in the product structure adjustment of large, medium-sized state-owned enterprises,affecting some other machinerymanufacturing plant to join industry of hydraulic excavator.For example,Chinese First Tractor Engineering machinery company, Guangxi Limited by Share Ltd, LiuzhouYuchaiengineering machinery factory. These enterprises has reached a certain scale and level after several years of efforts. For example, small hydraulic excavator Yuchai Machinery Limited by Share Ltd developed in twentieth Century and early 90's, for many years the batch exported to Europe, the United States and other countries, has become China's excavator industry can batch exportenterprises.
The personage inside course of study points out, China'ssingle bucket hydraulic excavator should develop tofullhydraulic steering; bucket capacity should be controlled at0.1-15 m3; while for large and multi bucket excavator,because the hydraulic components manufacturing,assembly accuracy requirement is high, repair the construction site conditions etc., are still in mechanical type. Should proceed to the research, using electro-hydraulic control technology, in order to realize the automation of hydraulic excavator manipulation.
