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Detailed Introduction of Hydraulic Tensile Testing Machine
Hydraulic Tensile Testing Machine is mainly used for tension, compression and shearing of metals, composites and products. The mechanical performance test can meet most of the major international standards such as GB, ISO, JIS, ASTM, DIN and various standards provided by users. It is widely used in materials testing in aerospace, machinery, wire and cable, rubber and plastic, building materials and other industries. It is an ideal testing instrument for scientific research institutes, enterprises, technical supervision and other departments.
There are many classification methods for hydraulic tensile testing machines. The general procedure is as follows: manual control and automatic control are divided into two control modes according to the display mode. It can be divided into Digital display and microcomputer display.
The most common products tested by hydraulic tensile testing machines are tensile strength and tensile modulus, flexural strength and modulus.The tensile test shows STM D 638 and ISO 527, there is a clamp at both ends of the wedge, the clamp is fixed, and the other is a fixed traverse, deviating from the fixed clamp to move the traction pattern until it breaks broken traverse automatically stops.For bending tests (ASTM, D790, D6272 and ISO 178), the specimen is placed on two supports placed on the stationary bed of the testing machine.In this test, the crosshairs are moved in the opposite direction of the tensile test and into ae unsupported center rather than pulling on the serrations until the specimen bends or even breaks. Since most thermoplastic materials do not break during this test, it is not possible to calculate the flexural strength at break.
Hydraulic tensile testing machine maintenance:
1. Machines and jigs should be coated with anti-rust oil,
2. Because the hydraulic tensile testing machine jigs are used frequently, they are easy to wear and oxidize too much. which can easily damage the leaking piston, all the tensioner should be clean and keep clean (it is best to clean it after completing test
3.the sliding surface of the insert plate and the bushing in contact with the dovetail groove bushing should be cleaned regularly and one or two thin molybdenum grease should be applied
4. Bolt Fastening Regular inspection of the site, if any, in timeig retighten
5. Check the gear pinion regularly, if the gear rim is loose, please retighten the tensioning device.
