the hydraulic transmission in the mechanical application-driven mechanical movement of the institutions

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the hydraulic transmission in the mechanical application-driven mechanical movement of the institutions, as well as a variety of transmission and control devices take many forms. Depending on the components and parts, can be divided into mechanical, ele ctrical, pneumatic, hydraulic gear. Often will be different forms of combined use - four in one. Hydraulic transmission has many advantages, the development of this new technology very quickly. Hydraulic drive is used in metal cutting machine tools, but 45 years of history. The aviation industry began after the 1930 adoption. Especially since the last three decades, hydraulic technology is more widely used in various industrial. On the machine, the hydraulic drive is often used in some of the following devices: a feed sports gear grinding wheel frame and table feed motion most of the hydraulic transmission; lathe, turret lathe, automatic lathe turret or transfer tower turret; milling machines, planers, machine tool table, etc. are also used hydraulic feed motion. Some of these components require fast-moving, and some require the slow-moving. While others require both fast-moving, it also requires a slow-moving. These movements mostly large speed range, stepless speed regulation requirements in the work; some require continuous feed, and some require intermittent feeding; some require constant speed under load changes, and some require good change to performance, and so on. All these requirements can be achieved with hydraulic transmission. Reciprocating the main sports gear planer table shaper or slotting ram, hydraulic requirements for high-speed reciprocating linear motion, and asked for a small shock, the commutation time is short, low energy consumption, and therefore can be used transmission. 3 profiling device lathe, milling machine, planer profile machining hydraulic servo system. Accuracy up to 0.01 ~ 0.02mm. In addition, the correction device of the forming wheel grinders can also use this system. (4) assist device clamping device on the machine, gear box variable speed control device, the screw-nut gap eliminator, the vertical moving parts balancing device, indexing devices, workpiece and tool handling device, the workpiece conveying device with hydraulic transmission will help simplify the machine structure, and improve the degree of machine automation. 5 the hydrostatic bearing hydrostatic bearing heavy machine tools, high-speed machine tools, precision machine tools, bearings, guide, lead screw nut institutions, etc. using, you can improve the work of stationary and motion accuracy. Table 1-1 shows the application of the hydraulic drive other machinery industrial sector. Table 1-1 hydraulic transmission place the name of the application instance of the industry in all types of machinery industry application example, construction machinery excavators, loaders, bulldozers, rollers, scrapers and other material handling equipment automotive crane, port crane, forklift, loading and unloading machinery mechanical piling machine, the construction of the belt conveyor and mining machinery such as drilling machines, excavators, mining machines, crushing machines, elevator, hydraulic support, hydraulic jacks, motor graders and other agricultural machinery combine harvesters, tractors, farm implements, suspension system, metallurgical machinery EAF top and electrode lift, rolling mills, presses, balers of Light Industry Machinery, injection molding machine, straightening machine, hydraulic adapter fittingsrubber vulcanizing machine, paper machine such as the automotive industry dump truck, flatbed, truck, car steering, shock absorber of Intelligent Machines, folding arm car handling, digital physical exercise, simulated cockpit, robot