Universal Testing Machines have a wide range of applications. A number of materials and metals in different forms and shapes can be tested for a variety of testes like tension, compression, Transverse, Bend Shear, Brinell Hardness, etc. Special attachments are also available for testing of flat belts, chain links, wire ropes etc.
1) Load 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 though main nuts. The middle cross head can be moved up or down through chain transmission and geared motor to adjust he initial tensile / Compression clearance. On the piston rest an assembly ensures smooth transfer of force with minimum friction.
2) Hydraulic system
Hydraulic circuit consist of hydraulic power pack having a directly driven radial plunger pump which gives a continuous non pulsating flow of oil pressure upto 250 bar. Oil filter, Oil strainer, Air breather, Oil level Indicator, Drain plug a provided on the power pack. A pressure compensated needle type flow control valve, is provided to control the oil flow by cylinder thereby achieving desired piston speed. Infinitely variable speeds can be obtained with the help of valves.
3) Electrical System
A separate switch box and electrical panels are provided. Both the hydraulic pump motor and the geared motor have interlocks. Limit switches are provided to stop the hydraulic pump motor if the load increases beyond the machine capacity of if the piston stroke is exceeded.
Universal testing machines have a wide range of applications. A number of materials & metals in different forms & shapes can be tested for a variety of tests like tension, compression, transverse, bend re-bend, 180º bend, shear, brinell, pullout, etc. Special attachments are also available for testing of flat belts, chain links, wire ropes, nut-bolts.
Special & Important Features:
Front Open Cross heads : This is an important feature which facilitates insertion of tensile specimen from the front. This is extremely useful especially for heavy specimens and bigger capacity machines. In this type of machine the jaws and the inserts also can be easily removed by just pulling from the front. When the jaws and inserts are heavy, it is very difficult to remove them from the machine from upper or lower side. Hence this is an important feature from the point of view of easy operation.
Hydraulic grips : Normally for standard Universal Testing Machines the jaw opening and specimen clamping is effected manually. But this becomes operator specific in this case. Hence it is a better choice to go for hydraulic operation of jaws (closing and opening). In this hydraulic griping method, separate double acting hydraulic cylinder operate the jaws and the cylinder operation is just by pressing a push button. So the operator has to operate the jaws and the cylinder operation is just by pressing a push button. So the operator has to operate only push buttons, which are conveniently located on the machine, to operate the jaws. A power pack with oil tank, pump, motor oil filler cum breather, oil level indicator, filter, relief valve is provided along with an electric motor to drive the hydraulic pump.
A wide variety of tests can be conducted on this machine viz, Tensile, Compressive, Transverse, peel test for adhesive tapes. The materials like rubber, plastics, ferrous metals, non ferrous metals, etc can be tested as per different standards. The test specimens can have a number of forms like round, flat, threads, wires, dumbbells, fabric, belts, straps, ropes, etc or sometimes components directly also can be tested. In order to cater to this variety forms, shapes and materials a range of grips can be offered.