Analog Compression Testing Machine - Analog Compression Tester
Compression Testing Machine (Compression Tester)
The FIE Compression Testing Machine incorporates design features to enable high accuracy testing with economy, speed and versatility.
Features - Compression Testing Machine
- 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 behaviors of materials.
- 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 standard specimens as well as structures.
- Simple controls for ease of operation.
- Robust straining frame of an extremely rigid construction.
- Safe operation ensured by means of safety devices.
Application - Compression Testing Machine
FIE Compression Testing Machine is designed to test metals and other materials under compression, bending, transverse, and shear loads. Hardness tests on metals can also be conducted.
Principle of Operation - Compression Testing Machine
Operation of the machine is by hydraulic transmission of load from the test specimen to a 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 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 represents 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 - Compression Testing Machine
I) Straining Unit
It consists of a hydraulic cylinder and a table coupled with the ram of the hydraulic cylinder, mounted on a 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 cross-head and the table.
II) Control Panel
The control panel consists of a power pack complete with drive motor, an oil tank, control valves, a pendulum dynamometer, a load indicator system, and an autographic recorder.
A) Power Pack
The power pack generates the maximum pressure of 200 kgf/cm². The hydraulic pump provides continuously no pulsating oil flow. Hence, the load application is very smooth.
Compression, transverse, bending, shear, and hardness tests are conducted between the cross-head and the table.
B) Hydraulic Controls
Hand-operated wheels are used to control the flow to and from the hydraulic cylinder. The regulation of the oil is infinitely variable. Incorporated in the hydraulic system is a regulation valve, which maintains a practically constant rate of table movement.
C) 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 is in use and is exceeded.
D) Pendulum Dynamometer
This unit permits selection of favorable hydraulic ratios producing relatively small frictional forces. Pressurized 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 to ensure high reliability of operation. The load transmitted to the dynamometer is transferred through a pendulum to the load indicator.
E) 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 ordinate in the ratio of either 1:5 or 1:10. A continuous roll of graph paper is stored inside the drum and is easily replaced.
Accuracy and Calibration -
All FIE Compression Testing Machine 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 and IS:1828. FIE Compression Testing Machine comply with Grade “A” of BS:1610 and Class 1 of IS:1828.
An accuracy of ±1.0% is guaranteed from 20% of the load range selected to its full load. Below 20% of the selected range, the maximum permissible error is 0.2% of the full load range.
Special Accessories -
These include load stabilizer, Brinell test attachment, Bend test attachment, Shear test attachment, and a wide range of accessories.
Installation -
It is recommended that machines be erected on a foundation. Details on foundation can be given on request. FIE reserves the right to change the above specifications and overall improvement in the design. The dimensions given above are approximate.
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Technical Specifications - Compression Testing Machine
| MODEL | CTM 50 | CTM 100 | CTM 200 | CTM 300 | CTM 500 | |
|---|---|---|---|---|---|---|
| Maximum Capacity | kN | 500 | 1000 | 2000 | 3000 | 5000 |
| 1st Measuring Range | 0-500 | 0-1000 | 0-2000 | 0-3000 | 0-5000 | |
| Minimum Graduation | kN | 1 | 2 | 4 | 5 | 10 |
| 2nd Measuring Range | kN | 0-250 | 0-500 | 0-1000 | 0-1500 | 0-2500 |
| Minimum Graduation | kN | 0.5 | 1 | 2 | 2.5 | 5 |
| 3rd Measuring Range | kN | 0-100 | 0-250 | 0-500 | 0-600 | 0-1000 |
| Minimum Graduation | kN | 0.2 | 0.5 | 1 | 1 | 2 |
| 4th Measuring Range | kN | 0-50 | 0-100 | 0-250 | 0-300 | 0-500 |
| Minimum Graduation | kN | 0.1 | 0.2 | 0.5 | 0.5 | 1 |
| Number of Division on Load Measuring Dial | 500 | 500 | 500 | 500 | 500 | |
| Max Clearance for Compression Test | mm | 500 | 500 | 700 | 700 | 1000 |
| Ram Stroke | mm | 100 | 100 | 150 | 150 | 200 |
| 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 | |
| Ø | 3 | 3 | 3 | 3 | 3 | |
| Weight (Approx.) | ||||||
| WEIGHT | tonne | 2 | 2.2 | 3.6 | 8.9 | 13 |
Downloads - Compression Testing Machine
