万能试验机的基础知识（Basic knowledge of universal testing machine）.docVIP

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万能试验机的基础知识（Basic knowledge of universal testing machine）.doc

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万能试验机的基础知识（Basic knowledge of universal testing machine）

万能试验机的基础知识（Basic knowledge of universal testing machine） Universal testing machine the basic knowledge of.Txt husband if you can in one day, I would like to use my life to continue your life, you should live happily in the up when please dont say you love me still. Type universal testing machine on the market today mainly has two series, four types of: 1, hydraulic series: manual hydraulic universal testing machine, electro hydraulic servo hydraulic universal testing machine 2, electronic universal series: conventional electronic universal testing machine, high performance electronic universal testing machine. Performance characteristics Series 1, hydraulic universal testing machine: 1) manual hydraulic universal material testing machine mainly adopts a simple high pressure oil source as the power source, manually adjust the valve as a control element, and manual load, therefore, it belongs to the open loop control system. Due to the oil flow and the main structure, cylinder piston stroke of its smaller, common in general about 300mm, it is generally less speed test. Impact of price factors, force sensors generally use pressure sensor (large tonnage basic use pressure sensor). Thus, low precision, range to a small, general precision is 1 or 2, the range is generally 4%-100%F.S. The affected cylinder friction, the tonnage is generally difficult to do, very small, domestic for a minimum of 5T. But because of the characteristics of low price and large tonnage, its current is still widely used in the finished product inspection, single material index test. 2) the electro-hydraulic servo universal testing machine is mainly used for precision high pressure oil source as the power source, the use of servo valve or proportional valve as a control element for the closed-loop automatic control, so the control performance is high, generally three kinds of control mode to achieve load, strain, displacement. With the manual hydraulic universal material testing machine, restricte