Electronic tensile test machinery

Application of electronic tensile testing machine

Operation :
Tension test is conducted by gripping the test specimen in the upper and middle cross head. Compression, bending, transverse, shear and Hardness tests are conducted between the middle and lower cross head by using appropriate fixtures. The rapid adjustment of middle cross head facilitates easy fixing of tensile Compression specimens of different lengths.

Loading Frame :
The base has a hydraulic cylinder at its center and two main screws at both ends. The middle cross head is mounted on screws through main nuts. The middle cross head can be moved up or down through chain transmission and geared motor to adjust the initial tensile/compression clearance. Inside base of machine, hydraulic cylinder is sested in which piston is placed on the piston, rests an assembly of upper, lower cross head and two columns.The individually lapped cylinder piston assembly ensures smooth axial force with minimum friction.
Control Panel :
Hydraulic circuit it consists of hydraulic power pack which has a directly driven radial plunger pump which gives continuous non pulsating flow of oil pressure up to 250bar a pressure compensated needle type flow control valve is obtained with help of valves. Optionally this can be controlled form electronic system.

Universal testing machines have a wide range of applications and number of materials, metals in different form and shapes can be tested for variety of tests like tension, compression, transverse, bend, shear, brinell Hardness etc. Special attachments are also available for testing of flat belts, chain Links, wire Ropes etc.

Loading Rate / Straining Rate Control :
This is superfine controlling system which controls loading rate / straining rate as per commands from electronic machine control system. FINE UTM Software can send loading rate / straining rate to electronic system for fully automatic testing.
Load Measurement System :
The oil pressure in the main cylinder is also transferred to an electronic pressure transducer which gives proportionate signal to electronic unit. Both the motors for hydraulic operation and cross head motion are controlled by buttons on electronic control system and they have interlocked to prevent simultaneous working of motors. The electrical panel is housed in control panel. Displacement measurement is carried out by means of a rack and pinion on rotary encoder. Encoder signal is fed to electronic system to get displacement.

Standards of electronic tensile tesing machinery

ASTMA370,ASTME4,ASTME8,ASTME9,ISO6892,ISO7438,ISO7500-1,EN10002-4,GB/T228-2002,etc.

Specifications of electronic tensile testing machine

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