The classification of tensile testing machine can be divided into the following three categories:
A, from the principle of the rally machine can be divided into mechanical tensile machine, hydraulic tension machine.
B, from the structure of a single column rally machine, double column rally machine, horizontal rally machine, vertical rally machine.
C, from the simple degree of operation can be divided into push-pull meter, electronic digital display tensile machine, computer servo-type rally machine.
1. Hydraulic pull machine is driven by the hydraulic cylinder up and down to move the plate and the fixture up and down displacement changes in order to achieve the various functions of the rally machine. The advantage is that it can do the tensile test of higher strength, the disadvantage is that the control precision is not high, and it is not too hygienic. Mainly applicable to metal materials, bridge bearings, large plates, building materials, composite materials and other industries. Its general load is above 300KN (30T).
The working principle of the hydraulic station is as follows: The motor drives the oil pump to rotate, the pump from the pump polish, the mechanical energy can be converted to the pressure of hydraulic oil, hydraulic oil through the integrated block (or valve combination) by the hydraulic valve to achieve the direction, pressure, flow adjustment after the external take over the road to the hydraulic machinery of the oil cylinder or oil motor, thus controlling the direction of the fluid motivation, the size and speed of the power, to promote a variety of hydraulic machinery work. (Know Can)
2. Mechanical tensile machine is mainly driven by the motor spiral screw rod rotation, driven by the screw rotation of the plate and clamp up and down to achieve tensile tension, compression stripping, tearing, shearing, three-point bending and other functions. This kind of rally machine has the advantage of high control precision, light operation, but generally can only reach 300KN (30T). Mainly used in non-metallic materials and tensile small metal materials, application industries mainly include: rubber, plastic, wire and cable, enameled wire, tape, adhesive, textile, footwear, leather, film, terminals and other industries.
3. Single-column rally machine and the function of the two-pole tensile machine No difference, mainly has the largest tensile size to determine, but also by the measured products required displacement stroke, sample size.
4. Electronic tensile machine and computer-type tensile machine compared to computer-style control more convenient, simple operation, powerful, such as computer-type tensile machine can be displayed through the software curve, find every point, each time the displacement force value display, thus better reflect the quality of the product measured.
5. Computer servo rally machine compared with the following advantages: the load displacement precision can reach 0.0001, the test speed can be adjusted at any time (0.01mm/min-500mm/min) does not affect the test performance of the product, the service life of twice times, the test noise is small 10 times times.