GATHA Product 2

GATHA Enterprises Email : gatha@vsnl.net

Computer Contolled-UTM, Tensile Testing ,Compression Testing Machine

Computer Controlled Universal Testing Machine: Range from 1 KN to 200 KN. Having High Axial Stiffness. Total Metal Construction. With wide range of Cross Head Speeds. Extensometer, Load Cells and Clamping Devices such as Wedge Grips, Eccentric Roller Grips, Compression cage, Yawn/Chord Grip, Flexural Cage etc. to suit the requirements. Modern software for to test, analyze, graph ,report , calculations, zooming of graph, storage and retrieval of data and so many other facilities. For Standard Machine Cross head Stroke without Load Cell and Grips 1000mm,Clearance between Columns 350mm to 450 mm. Machine is suitable for testing Ferrous, Non -ferrous, Fabric, Rubber material etc. Micro-Processor based and Machines as per the require specifications are also available

Tensile Testing Machine: Range 20 N to 100 KN, Wide range of Fixed and variable speed range. Wide range of grips and accessories (as mentioned above) to suit require application. High Accuracy +/-1% as per IS 1828/BS1610. Three Measuring range for accurate testing.

Machine is electrically operated. Due to rotation of main nut gripping head moves up and down. Downward motion applies tensile force on the specimen which measure by Pendulum dynamometer and is indicated on Dial.

Simple Desktop Compact Universal Testing Machine for Tension, Compression Bending Test to be carried our on variety of materials. Most Suitable for Small Industries where budget is the important factor, Engineering Colleges etc...

Load Frame is of motorized test stand. It consist of a lower stationary base plate table format with integrated drive, upper fixed cross tie on two supporting columns and a movable cross head with the help of lead screw & Nut Mechanism. The choices of fixed speed or variable speed range for cross head available. All these frame drives are controlled by Micro Controller based measurement and control unit, it has soft touch operating key board which consist of functional keys for machine control, a printer port, RS232C Computer interface, 32 Character-2 Line LCD alphanumeric displays.

COMPRESSION TESTING MACHINES

FEATURES :

The Compression Testing Machine Incorporates design features to enable high accuracy testing with economy, speed & versatility.

• Loading Accuracy as high as + 1%
• Straining at variable speeds to suit a wide range of materials.
• Continuous roll autographic recorder supplied as standard to enable study of the behavior of materials
• Motor driven geared shafts for quick effortless adjustment of cross-head-to facilitate rapid fixing of test specimen.
• High reading accuracy due to large size and design of dial.
• Wide range of standard and special accessories, including load stabilizer.
• Large effective clearance between columns enables testing of standards specimens as well as structures.
• Simple controls for easy of operation.
• Robust staining frame of an extremely rigid construction.
• Safe operation ensured be means of safety devices.

Application :
Compression Testing Machine is designed for test materials under compression bending, transverse and shear loads. Hardness test on metals can also be conducted.

Principal of Operation :
Operation of the machines is by hydraulic transmission of load from the test specimen to separately housed load indicator. The hydraulic system is ideal since it replaces transmission of load through levers and knife edges, which are prone to wear and damage due to shock on rupture of test pieces.

Load is applied by a hydrostatically lubricated ram. Main cylinder pressure is transmitted to the cylinder of the pendulum dynamometer system housed in the control panel. The cylinder of the dynamometer is also of self-lubricating design. The piston of the dynamometer is constantly rotated to eliminate friction. The load transmitted to the cylinder of the dynamometer is transferred through a lever system to a pendulum. Displacement of the pendulum actuates the rack and pinion mechanism which operates the load indicator pointer and the autographic recorder. The deflection of the pendulum represent the absolute load applied on the test specimen.

Return movement of the pendulum is effectively damped to absorb energy in the event of sudden breakage of a specimen.

Machine consists of :

Straining Unit
This consists of a hydraulic cylinder and a table coupled with the ram of hydraulic cylinder, mounted on robust base. The cylinder and the ram are individually lapped to eliminate friction. The cross-head is connected to two screwed columns and is driven by a motor, for rapid adjustment of test height.

An elongation scale with a minimum graduation of 1.0 mm, is provided to measure the deformation of the specimen.

Compression, transverse, bending, shear and hardness tests are conducted between the lower cross head and the table.

Control Panel :
The control Panel consists of a power pack complete with drive motor and an oil tank, control valves a pendulum dynamometer a load indicator system and an autographic recorder.

Power Pack :
The power pack generates the maximum pressure of 200 kgf/cm² the hydraulic pump provides continuously non-pulsating oil flow. Hence the load application is very smooth.

Hydraulic Controls :
Hand operated wheels are used to control the flow to and from the hydraulic cylinder. The regulation of oil flow is infinitely variable incorporated in the hydraulic system is a regulating valve which maintains a practically constant rate of table movement.

Load Indicator System :
This system consists of a large dial and a pointer. A dummy pointer is provided to register the maximum load reached during the test. Different measuring ranges can be selected by operating the range selection knob. An overload trip switch is incorporated which automatically cuts out the pump motor when the load range in use is exceeded.

Pendulum Dynamometer :
This unit permits selection of favorable hydraulic ratios producing relatively small frictional forces. Pressurised oil in the loading cylinder pushes up the measuring piston proportionately and actuates the special dynamometer system. The piston is constantly rotated to eliminate friction. The dynamometer system is also provided with an integral damper and ensures high reliability of operation. The load transmitted to the dynamometer is transferred through a pendulum to the load indicator.

Autographic Continuous Roll Load-Elongation Recorder :
This unit is of the pen and drum type and is supplied as standard. The horizontal motion of the pen produces the load ordinate of the diagram and the drum rotation produces the extension ordinates in the ration of either 1:5 or 1:10.
A continuous roll of graph paper is stored inside the drum and is easily replaced.

Accuracy & Calibration :
Compression Testing Machines are closely controlled for sensitivity, accuracy and calibration during every stage of manufacture. Every machine is then calibrated over each of its measuring ranges in accordance with the procedure laid down in BS : 1610 : Part 1 :1992 and IS 1828
An accuracy of + 1.0% is guaranteed from 20% from 20% of the load range selected to full load. Below 20% of the selected range, the maximum permissible error is 0.2% of the full load reading.

SPECIFICATION :

MODEL	-	CTM 50	CTM 100	CTM 200	CTM 300	CTM 500
Maximum capacity	kN	500	1000	2000	3000	5000
1st Measuring Range	kN	0-500	0-1000	0-2000	0-3000	0-5000
Minimum Graduations	kN	1	2	4	5	10
2nd Measuring Range	kN	0.250	0-500	0-1000	0-1500	0-2500
Minimum Graduations	kN	0.5	1	2	2.5	5
3rd Measuring Range	kN	0-100	0-250	0-500	0-600	0-1000
Minimum Graduations	kN	0.2	0.5	1	1	2
4th Measuring Range	kN	0.50	0-100	0-250	0-300	0-500
Minimum Graduations	kN	0.1	0.2	0.5	0.5	1
Number of division on load measuring dial		500	500	500	600	500
Maximum Clearance for compression test at fully descended working piston	mm	500	500	700	700	1000
Ram stroke	mm	100	100	150	150	250
CONNECTED LOAD	-	-	-	-	-	-
Power	Kw	1.12	1.5	2.2	4.5	4.5
V	-	400-440	400-440	400-440	400-440	400-440
Æ	-	3	3	3	3	3
WEIGHT	-	-	-	-	-	-
(Approx.)	tone	2	2.2	3.6	8.9	13

Special Accessories :
These include load stabilizer, Brinell test

Attachment, Bend Test Attachment, Shear Test Attachment and Electronic Model and a wide range accessories offered on request at additional cost.

Installation :
It is recommended that machines be erected on a foundation. Details on foundation can be given on request