Universal Testing Machine: Learn About Components & Functions
- Loading Unit
- Control Unit
Load Frame
A universal testing device's load frame can be constructed using a single support or two supports. The upper crosshead, lower crosshead, and table that the specimen is set on for the compressive strength test make up the load Frame.
Upper Crosshead and Lower Crosshead
The test specimen is clamped at one end using the top crosshead. The moveable crosshead in the load frame is the lower crosshead, and its screws can be loosened and tightened to change the crosshead's height. A tapered slit runs through the middle of each crosshead. The tensile test specimen is supposed to be held in place by a pair of racking jaws that are located in this slot.
Elongation Scale
The elongation scale that is included with the loading unit measures the relative motion of the upper and bottom tables.
Control Unit
- 1. Hydraulic Power Unit
- 2. Load Measuring Unit
- 3. Control Devices
Hydraulic Power Unit
This component consists of an oil pump that feeds steady oil into the load unit's main cylinder. The specimen is loaded more easily thanks to this flow. An electric motor and sump operate the oil pump in a hydraulic power unit.
Load Measuring Unit
Control Devices
The controls could be hydraulic or electronic. Switches are used by electric control devices to move the crossheads and turn the unit on and off. Two valves—the right control valve and the left control valve or release valve—make up a hydraulic control device. The specimen is subjected to load using a proper control valve.
Functions of UTM
UTM is mostly used to assess the mechanical characteristics of materials. UTM regularly conducts the following tests:
- 1. Tensile Test
- 2. Adhesion Tests
- 3. Bending Test
- 4. Hysteresis Test
- 5. Compression Test
- 6. Pull-Out Tests
Materials that can be tested by UTM:
- Concrete
- Steel
- Winches
- Steel Ropes
- Cables
- Springs
- Steel Wires
- Slings
- Links
- Rope
- Chains
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