Common faults and solutions of tensile testing machine

The tensile testing machine has many functions and can detect the strength of various materials. When the instrument encounters a problem or malfunction, the following methods can help you. 1. When the tensile testing machine is loaded, the pointer vibrates or stops at all times. 1. The clutch gear is worn: repair or replacement is required. 2. The leather washer or spring of the friction disc is worn out: the leather washer or spring needs to be replaced. 3. Displacement of the control handle: adjust the control handle to make it fit well with the alveolar. 2. The pointer does not return to zero when the pendulum is replaced. 1. The installation of the tensile testing machine is not level: adjust the level of the testing machine with a spirit level. 2. The pendulum is not vertical: only hang A mound. Adjust the balance mound to make it vertical. 3. The return of the pendulum of the tensile testing machine is too fast or too slow. 1. The buffer valve gear position is improperly placed: adjust the buffer valve to an appropriate position. 2. The hydraulic oil viscosity is too low or too high: when the hydraulic oil viscosity is too low, the pendulum falls quickly, and when the viscosity is high, it falls slowly. Hydraulic oil of proper viscosity should be replaced. 3. Dirty in the buffer valve, oil pipe or hydraulic oil: clean the buffer valve and oil pipe. Replace hydraulic oil. 4. The pointer of the tensile testing machine returns to zero and is idle or unstable. 1. The pointer bearing and spindle bearing are corroded or oily: clean or replace the bearing. 2. The gear rod is deformed or the gear rod does not mesh with the gear: straighten the gear rod or clean and trim gears, sheaves and other transmission parts. 3. Dirt in the buffer valve: clean the buffer valve. Five, the positive deviation of the tensile testing machine indication 1. The short arm blade is loose: tighten the blade tightly. 2. The pendulum mound is lighter: give the mound weight (the weight of A, B, and C mounds must be taken into account). 6. 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 measurement transmission component is too large: mainly to adjust and clean the bearing and the force measurement transmission component. Eliminate abnormal frictional resistance. 2. The tightness of the upper chuck and the driven needle spring and the friction resistance of the drawing device are large: adjust the tightness of the upper chuck, the driven needle spring and the drawing device components. Eliminate abnormal frictional resistance. 3. The connecting part of the piston rod and the pendulum rod is not flexible: adjust the connecting part of the two. Make it flexible. VII. Sluggish or displacement of the driven needle 1. The influence caused by the elastic force of the driven needle spring or the frictional resistance between the driven needle and the indicator plate: adjust the elastic force of the driven needle spring or the problem between the driven needle and the indicator disk. Gap. 2. The weight of both ends of the driven needle has deviation: adjust the weight of both ends to make it balanced. 8. Irregular deviation of the indication value 1. The gear rod and gear have oil stains, wear or burrs: eliminate the oil stains and burrs of the gear rod and gear, find out the contact point of the gear rod when the tolerance is exceeded, and then correct the gear rod and gear; If the error cannot be eliminated. Replace the rack and gear. 2. The installation of the tensile testing machine is not level: adjust the level. 3. Gear rod bending: straighten or replace the gear rod, adjust the gap of the rolling groove wheel. 9. After the computer software is online, a prompt box appears indicating that it is overloaded. The solution is to check whether the communication line between the computer and the testing machine is off; check whether the online selection sensor is selected correctly; check whether the sensor has been hit during the latest test or operating the keyboard; check whether the software calibration or calibration function is used before the problem occurs; Check whether the calibration value, calibration value or other information in the hardware parameters has been manually changed. 10. The power supply of the main machine of the testing machine is not on and cannot be moved up and down. The solution is to check whether the power line connected to the testing machine is connected normally; check whether the emergency stop switch is in the twisted state; check whether the power supply voltage connected to the testing machine is normal; check whether the fuse on the machine socket is blown out, please take out the spare fuse Just install it. 11. The main body of the testing machine is powered but the equipment cannot be moved up and down. The solution is to check whether the device cannot be moved after 15S (time), because the host needs self-checking when it is turned on, which takes about 15S; check whether the upper and lower limit positions are in the right position and there is a certain amount of running space; check the connection to the test machine Whether the power supply voltage is normal.

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