Tensile testing machine precautions

The tensile testing machine is also known as the universal material testing machine. The universal testing machine is a mechanical augmenting test machine for testing mechanical properties such as static load, tensile, compression, bending, shearing, tearing and peeling of various materials. It is suitable for plastic sheets and pipes. Various physical and mechanical properties of materials such as profiled materials, plastic film and rubber, wire and cable, steel, glass fiber, etc. are developed for materials, and are indispensable testing equipment for physical property testing, teaching research, quality control, etc. Important components, different materials require different fixtures, and it is also an important factor in whether the test can be carried out smoothly and the accuracy of the test results is high.

1. When the tensile testing machine is loaded, the pointer vibrates or stops when it stops.

1. Clutch gear wear: need to be repaired or replaced.

2. The friction washer or spring wear of the friction disc: the leather washer or spring needs to be replaced.

3, the joystick shift: adjust the joystick to make it fit with the socket.

Second, the pointer does not return to zero when the pendulum is replaced

1. The tensile tester is not installed horizontally: adjust the test machine with a level.

2, the pendulum is not vertical: only hang A ç £. Adjust the balance so that it is vertical.

Third, the tensile test machine pendulum return position is too fast or too slow

1. The buffer valve position is not properly placed: adjust the buffer valve to the appropriate position.

2. The viscosity of the hydraulic oil is too low or too high: when the viscosity of the hydraulic oil is too low, the pendulum will fall back quickly, and when the viscosity is high, it will fall back slowly. The hydraulic oil of the appropriate viscosity should be replaced.

3. The inside of the buffer valve, the oil pipe or the hydraulic oil is dirty: cleaning the buffer valve and the oil pipe. Replace the hydraulic fluid.

Fourth, the tensile test machine pointer back to zero lag or instability

1. The pointer bearing and the spindle bearing are corroded or oily: clean or replace the bearing.

2. The deformation of the rack bar or the gear rod does not mesh with the gear: straighten the rack rod or clean, trim gear, slot wheel and other transmission components.

3. There is dirt in the buffer valve: cleaning the buffer valve.

V. The positive deviation of the tensile test machine

1. The short arm blade is loose: the blade is tight.

2, the pendulum is light: give the weight of the sputum (to balance the weight of A, B, C )).

Sixth, the main reason for the negative deviation of the indication is that the frictional resistance between the components is too large.

1. The frictional resistance of the pointer bearing, the pendulum shaft bearing and the force measuring transmission component is too large: mainly to adjust and clean the bearing and the force transmission component. Eliminate abnormal frictional resistance.

2. The upper chuck, the driven needle spring pian tightness and the frictional resistance of the drawing device are large: adjust the upper chuck, the driven needle spring pian tightness and the drawing device parts. Eliminate abnormal frictional resistance.

3. The joint between the piston rod and the swing rod is not flexible: adjust the joint between the two. Make it flexible.

Seven, the follower needle drag or shift

1. The effect of the driven needle spring pian elastic force or the frictional resistance of the driven needle and the indicator disc: adjust the elastic force of the driven needle spring pian or the gap between the driven needle and the indicator disc.

2. There is a deviation between the two ends of the driven needle: adjust the weight of both ends to make it balanced.

Eight, the deviation of the indication value is irregular

1. The gears and gears are oily, worn or burred: eliminate the oil stains and burrs of the gear bars and gears, find out the contact points of the gear bars when the gears are out of tolerance, and then correct the gear bars and gears; if the error cannot be eliminated. Replace the rack and gear.

2. The tensile testing machine is not installed horizontally: adjust the level.

3. Bending the rack: straighten or replace the rack and adjust the gap of the rolling sheave.

Nine, the computer software is online after the prompt box information display overload

The solution is to check whether the communication line between the computer and the test machine is off; check whether the online selection sensor is selected correctly; check the most recent test or operation key

Whether the sensor is bumped during the disc; check if the calibration or calibration function of the software is used before the problem occurs; check if the calibration value, calibration value or other information in the hardware parameters have been manually changed.

Ten, the test machine host power is not bright, can not move up and down

The solution is to check whether the power supply line connected to the test machine is connected properly; check if the emergency stop switch is in the screwed state; check whether the power supply voltage of the test machine is normal; check whether the fuse on the machine socket is blown, please take out the spare fuse Just install it.

XI. The test machine host has power but the device cannot move up and down.

The solution is to check if the device is still unable to move after 15S (time), because the host needs self-test when it is powered on, it takes about 15S time; check whether the upper and lower limits are at the right position, there is a certain running space; check the access test machine Whether the power supply voltage is normal.

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