Electronic tensile testing machine is used on a variety of materials for equipment static load, tensile, compression, bending, shear, tear, peel etc. for the test of mechanical properties of the mechanical loading of the testing machine, tensile testing machine in use in common faults include the following aspects, Suzhou chuangheng here is a summary of the tensile machine common fault analysis and timely solution, if you control after still does not solve the problem, welcome call us to provide professional consulting and maintenance services.
One: the power of the fixture is not enough, it is easy to cause the material can not meet the purpose of our experiment:
1: the power is not enough reasons: power supply voltage instability, the screw rod has been worn or damaged, the fixture is not fixed, etc..
The method of solving the method: when the voltage is stable, the wire rod must be checked before each test, the wear degree of the wire rod is changed.
2: if the oil return valve handle is screwed up, the vent pipe is still the oil outflow, illustrate the oil return valve closure lax, oil needle and valve body sealing is not good.
Solution: the oil needle unscrew the nuts one week, the oil needle handle to tighten and a hand with a wrench to the nut is screwed set, and the other hand to screw on oil needle handle, then loosen the nut set, oil needle handle returned two weeks, and then fastening nut. Re loading, the general can solve the problem. If there is still oil flow out, it may be the oil needle and the nut sleeve is not concentric, can replace the nut sleeve, eliminate the problem of concentric.
Three: if the oil valve handle has been loosened, and the overflow pipe still has a large number of oil spills, and not on the load, the main reason is that:
A: damping rod (needle valve and valve damping gap is too small, on piston cavity pressure insufficient compensation, after the piston moves, from the pump to play the oil through the overflow valve is directly flows back to the tank.
Solution: replace the exhaust damper rod (needle) or damping rod (needle) of the flat face to file research, expand the damping gap.
B: piston and piston sleeve surface of solid particles of pollutants, the piston in the movement, is equivalent to the role of abrasive wear, resulting in abrasive wear, and stuck or mobiles is not smooth, so that the overflow mouth often open.
Solution: to send oil valve behind the fixed plug removed, remove the piston and piston apply grinding and polishing agent for grinding and polishing.
Four: if the main engine working cylinder of the discharge pipe, there is a large number of oil leakage, the test machine and load, the main reason is:
A: oil viscosity is low.
Solution: change the viscosity of the larger oil.
B: cylinder and piston clearance is too large.
Solution: study or replace the piston.
Five: if the oil return valve, the valve and the working piston are not found to be found in the problem, can be considered the oil pump with high pressure oil output.
Check method: close the return valve, open the oil delivery valve, if the overflow pipe on the oil valve without oil flow out, can be a preliminary judgment of the problem on the oil pump, the oil pump for removal and inspection. The main reason for the failure of oil pump is:
A: failure or fracture of the spring, so that the piston in the oil volume is not enough or the piston does not work, the oil volume is also natural.
Solution: replace the spring.
B: into the oil valve ball and the valve ball valve failure, the reason is that the impurities in the oil mixed with the liquid trapped in a one-way valve seat, so that the valve can not play the role of closure.
The method: the valve seat in front of the hollow nut remove, remove the valve seat and clean, if the wear is slight, can be a short sleeve as a special research rod, and the end of the research rod with a standard new steel ball, the ball valve seat grinding, until contact with the valve seat, where the line. If the valve seat wear serious, it is difficult to repair, in the replacement of the new valve seat, it should be the new valve seat to be ground, into the pump body, with the research rod and then grinding until the sealing technology requirements.
C: high pressure tubing connector on the oil pump seal is not tight, the high pressure oil pump is the use of a fixed nut high pressure oil pipe, oil collector, pump body and the aluminum gasket together, if the failure of the gasket, will make the oil leakage, resulting in load and not.
Solution: remove the high pressure pipe joint replacement of aluminum.
D: because of the large gap between the plunger and the plunger sleeve, or loose, leakage of oil in the presence of a set of oil, so that the internal pressure of the pump casing, when the back pressure role in the piston head and the spring back to offset, the plunger can not reset the oil, causing no oil output.
Solution: remove the oil pump for cleaning the replacement of the total process of the piston or tighten the nut on the plunger sleeve.
Six: insufficient oil tank. Loading to load, send oil relief valve tube "puff", "puff" sound and a little oil and gas bubbles. No oil flow out of the overflow pipe when the load is no longer.
Solution: add the lubricating oil to the tank until the oil level reaches half of the oil window.
Seven: the oil tank on the inner wall of the filter oil net plug, after the oil pump starts, because the oil filter oil network blockage caused by insufficient oil pump.
Solution: use the hose to the oil spill valve, start the oil pump to pump the oil out of the tank, close the oil pump. Open the oil tank to put the remaining oil drain, and then open the lower end of the fuel tank, remove the oil filter oil to clean the oil in the oil or diesel, and the bottom of the oil tank can be cleaned after installation.
Eight: driven oil pump belt is loose, with skid phenomenon. Loading to certain load on the rise, sending oil valve overflow pipe without oil outflow.
Solution: slightly loosen the motor fixed bolts, screw bolts, with experience, the belt tension is moderate, and then tighten the fixed bolt
Six: insufficient oil tank. Loading to load, send oil relief valve tube "puff", "puff" sound and a little oil and gas bubbles. No oil flow out of the overflow pipe when the load is no longer.
Solution: add the lubricating oil to the tank until the oil level reaches half of the oil window.
Seven: the oil tank on the inner wall of the filter oil net plug, after the oil pump starts, because the oil filter oil network blockage caused by insufficient oil pump.
Solution: use the hose to the oil spill valve, start the oil pump to pump the oil out of the tank, close the oil pump. Open the oil tank to put the remaining oil drain, and then open the lower end of the fuel tank, remove the oil filter oil to clean the oil in the oil or diesel, and the bottom of the oil tank can be cleaned after installation.
Eight: driven oil pump belt is loose, with skid phenomenon. Loading to certain load on the rise, sending oil valve overflow pipe without oil outflow.
Solution: slightly loosen the motor fixed bolts, screw bolts, with experience, the belt tension is moderate, and then tighten the fixed bolt. If belt wear or deformation, should be updated.
9: the oil collecting device for oil pump compaction in the pump body. Loading to certain load not rise, oil supply valve overflow pipe without oil outflow.
Solution: the oil pump set to the rear end of the fixed nut tightening. If there is still a problem, remove the collector, and replace the "O" - shaped ring between the collector and the pump.
One: the power of the fixture is not enough, it is easy to cause the material can not meet the purpose of our experiment:
1: the power is not enough reasons: power supply voltage instability, the screw rod has been worn or damaged, the fixture is not fixed, etc..
The method of solving the method: when the voltage is stable, the wire rod must be checked before each test, the wear degree of the wire rod is changed.
2: if the oil return valve handle is screwed up, the vent pipe is still the oil outflow, illustrate the oil return valve closure lax, oil needle and valve body sealing is not good.
Solution: the oil needle unscrew the nuts one week, the oil needle handle to tighten and a hand with a wrench to the nut is screwed set, and the other hand to screw on oil needle handle, then loosen the nut set, oil needle handle returned two weeks, and then fastening nut. Re loading, the general can solve the problem. If there is still oil flow out, it may be the oil needle and the nut sleeve is not concentric, can replace the nut sleeve, eliminate the problem of concentric.
Three: if the oil valve handle has been loosened, and the overflow pipe still has a large number of oil spills, and not on the load, the main reason is that:
A: damping rod (needle valve and valve damping gap is too small, on piston cavity pressure insufficient compensation, after the piston moves, from the pump to play the oil through the overflow valve is directly flows back to the tank.
Solution: replace the exhaust damper rod (needle) or damping rod (needle) of the flat face to file research, expand the damping gap.
B: piston and piston sleeve surface of solid particles of pollutants, the piston in the movement, is equivalent to the role of abrasive wear, resulting in abrasive wear, and stuck or mobiles is not smooth, so that the overflow mouth often open.
Solution: to send oil valve behind the fixed plug removed, remove the piston and piston apply grinding and polishing agent for grinding and polishing.
Four: if the main engine working cylinder of the discharge pipe, there is a large number of oil leakage, the test machine and load, the main reason is:
A: oil viscosity is low.
Solution: change the viscosity of the larger oil.
B: cylinder and piston clearance is too large.
Solution: study or replace the piston.
Five: if the oil return valve, the valve and the working piston are not found to be found in the problem, can be considered the oil pump with high pressure oil output.
Check method: close the return valve, open the oil delivery valve, if the overflow pipe on the oil valve without oil flow out, can be a preliminary judgment of the problem on the oil pump, the oil pump for removal and inspection. The main reason for the failure of oil pump is:
A: failure or fracture of the spring, so that the piston in the oil volume is not enough or the piston does not work, the oil volume is also natural.
Solution: replace the spring.
B: into the oil valve ball and the valve ball valve failure, the reason is that the impurities in the oil mixed with the liquid trapped in a one-way valve seat, so that the valve can not play the role of closure.
The method: the valve seat in front of the hollow nut remove, remove the valve seat and clean, if the wear is slight, can be a short sleeve as a special research rod, and the end of the research rod with a standard new steel ball, the ball valve seat grinding, until contact with the valve seat, where the line. If the valve seat wear serious, it is difficult to repair, in the replacement of the new valve seat, it should be the new valve seat to be ground, into the pump body, with the research rod and then grinding until the sealing technology requirements.
C: high pressure tubing connector on the oil pump seal is not tight, the high pressure oil pump is the use of a fixed nut high pressure oil pipe, oil collector, pump body and the aluminum gasket together, if the failure of the gasket, will make the oil leakage, resulting in load and not.
Solution: remove the high pressure pipe joint replacement of aluminum.
D: because of the large gap between the plunger and the plunger sleeve, or loose, leakage of oil in the presence of a set of oil, so that the internal pressure of the pump casing, when the back pressure role in the piston head and the spring back to offset, the plunger can not reset the oil, causing no oil output.
Solution: remove the oil pump for cleaning the replacement of the total process of the piston or tighten the nut on the plunger sleeve.
Six: insufficient oil tank. Loading to load, send oil relief valve tube "puff", "puff" sound and a little oil and gas bubbles. No oil flow out of the overflow pipe when the load is no longer.
Solution: add the lubricating oil to the tank until the oil level reaches half of the oil window.
Seven: the oil tank on the inner wall of the filter oil net plug, after the oil pump starts, because the oil filter oil network blockage caused by insufficient oil pump.
Solution: use the hose to the oil spill valve, start the oil pump to pump the oil out of the tank, close the oil pump. Open the oil tank to put the remaining oil drain, and then open the lower end of the fuel tank, remove the oil filter oil to clean the oil in the oil or diesel, and the bottom of the oil tank can be cleaned after installation.
Eight: driven oil pump belt is loose, with skid phenomenon. Loading to certain load on the rise, sending oil valve overflow pipe without oil outflow.
Solution: slightly loosen the motor fixed bolts, screw bolts, with experience, the belt tension is moderate, and then tighten the fixed bolt
Six: insufficient oil tank. Loading to load, send oil relief valve tube "puff", "puff" sound and a little oil and gas bubbles. No oil flow out of the overflow pipe when the load is no longer.
Solution: add the lubricating oil to the tank until the oil level reaches half of the oil window.
Seven: the oil tank on the inner wall of the filter oil net plug, after the oil pump starts, because the oil filter oil network blockage caused by insufficient oil pump.
Solution: use the hose to the oil spill valve, start the oil pump to pump the oil out of the tank, close the oil pump. Open the oil tank to put the remaining oil drain, and then open the lower end of the fuel tank, remove the oil filter oil to clean the oil in the oil or diesel, and the bottom of the oil tank can be cleaned after installation.
Eight: driven oil pump belt is loose, with skid phenomenon. Loading to certain load on the rise, sending oil valve overflow pipe without oil outflow.
Solution: slightly loosen the motor fixed bolts, screw bolts, with experience, the belt tension is moderate, and then tighten the fixed bolt. If belt wear or deformation, should be updated.
9: the oil collecting device for oil pump compaction in the pump body. Loading to certain load not rise, oil supply valve overflow pipe without oil outflow.
Solution: the oil pump set to the rear end of the fixed nut tightening. If there is still a problem, remove the collector, and replace the "O" - shaped ring between the collector and the pump.
Previous：Already the first article
next：Test method for speed and force of electronic tensile testing machine
Copyright©Dongguan Perfect Instrument Co., Ltd.