液压垫拉伸液压机是拉伸机的较为常用的一种，适用金属板材的深拉伸工艺。这款400吨四柱液压垫拉伸液压机是其中较为常用的一款，专门用于不锈钢风机外壳拉伸成型，采用三梁四柱式结构设计，是在三梁四柱的结构基础上在工作台下面又增加了一个液压垫装置，液压垫也就是多顶出机构，根据产品的大小在工作台上均匀分布一些顶出杆，液压垫顶杆的摆放形状跟产品形状一致，拉伸出来的产品也就能保证一致。
400 tons of four-column hydraulic pad stretching hydraulic press stretching principle:
A slider pushes the upper die to press the sheet to be processed into the lower die, thus forming the desired shape. However, in practice it is a very complicated process. Because in the forming process, the deep drawing hydraulic pad is the relative moving part of the slider, so their movement must be accurately coordinated, so as to ensure the precise forming force requirements.
The 400-ton four-column hydraulic pad stretching hydraulic press adopts a three-beam and four-column structure. The fuselage is composed of an upper beam, a sliding beam, a workbench, a hydraulic pad, an ejector rod, an oil cylinder, an upright column, a liquid filling box, a limiting mechanism, etc. Hydraulic machine with PLC programmable controller and touch screen, you can visually view some data and facilitate timely adjustment. The hydraulic press operation button is integrated on a movable button operation table, and its position can be moved at will within a certain distance, which is convenient for operation. The 400-ton four-column hydraulic pad stretching hydraulic press adopts PLC automatic control, and can realize manual, semi-automatic and automatic operation modes. The working pressure, pressing speed and stroke range of the machine can be adjusted according to the process needs. The slider can be stationary at any position when working. It adopts three-beam and four-column structure, the whole machine has simple structure and beautiful appearance, the hydraulic system adopts cartridge valve, the structure is compact, the action is sensitive and reliable, and it is convenient for fault diagnosis and elimination. It is suitable for the sheet drawing process of metal and the pressing process of plastic materials, with independent power mechanism and electrical system.
This 400-ton four-column hydraulic pad stretching hydraulic press has small diameter tolerance, smooth stretching surface and neat cutting surface. The customer was very satisfied. The machine body hydraulic station on the upper, effectively reducing the area, double hydraulic cylinder support, to ensure the concentration of the pressing force, to avoid partial load. It is suitable for drawing and forming of stainless steel sheet, deep and shallow drawing process of other workpieces, and can also be used for bending, flanging, blanking and other processes. One machine is multi-purpose, only need to replace the mold. This 400-ton four-column hydraulic cushion stretching hydraulic press is also suitable for the production and manufacture of aluminum, copper products, stainless steel, thin iron and other products.