Tensile testing machine is one of the precision measuring instruments. There are many aspects to be noted in the installation and subsequent maintenance.
Tensile testing machine should be installed in a clean, dry, vibration-free room with room temperature of 20°C+/-10°C, and noticed that the beam bending test and the use of extensometer for testing and maintenance of equipment should be left around the testing machine. There is enough free space.
1. The main body and dynamometer of the tensile testing machine shall be installed on the basis of concrete. The basic dimensions shall be stipulated according to the appearance and foundation plan, leaving the anchor screw and the lower jaw screw hole and other wire installation pipelines and other devices. .
The upper plane of the foundation should be leveled and leveled up. After the foundation is dry, the testing machine is installed.
1 The installation of the tensile testing machine and the preliminary accuracy alignment The main body and the dynamometer are respectively transported to the foundation of concrete. The distance between the main body and the dynamometer is adjusted according to the appearance and the foundation map and the direction is adjusted. Then thin and thin can be used. The small pieces of iron were inserted into the main body and the lower part of the dynamometer (between the base), respectively, and were calibrated using a square level with a precision of 0.05/1000.
The initial alignment of the main body can be measured in two different vertical and horizontal positions of the two columns and measured with a square spirit level. The non-lead sag should not be greater than 0.3/1000. Then, a square spirit leveler can be used to locate the vertical and horizontal positions on the outer surface of the cylinder. Plumbness.
2 Precision test of tensile testing machine After correcting the initial accuracy of the testing machine, the initial running test is performed after connecting the oil pipe, power supply and oil filling. After the test is in good condition, the accuracy of the testing machine is corrected.
Use a square horizontal instrument to rest on the working platform, find the positive-sag of the cylinder, adjust or increase or decrease the horn below the base, so that the error cannot be greater than 0. 10/1000.
After the precision of the test machine is found, the cement paste is used to fill all the gaps below the base to maintain a good combination of the base and the cement foundation, so as to prevent the level of the test machine from being damaged due to vibration during use.
After the groundnuts are grouted, do not fasten the foot nuts and start the tester before the cement has dried. (Cement drying time is generally not less than 10-15 days.) After the cement is completely dry, fasten the handle nut and review the installation accuracy of the tester. Is it consistent with the accuracy of the alignment? If not, you should re-find it.
Tensile force testing machine in the use of the process, due to the vibration tends to produce loosening test, so the tension tester after a period of time, the relevant parts should be tightened.
2. When taking over the tubing connecting the main body and the dynamometer, the interior of the tubing should first be washed with kerosene to ensure the cleanliness of the oil circuit. It should be noted that the gasket at the joint is intact to prevent oil leakage at high pressure.
3, the oil specifications used in the hydraulic rotation, can use N68 precision machine tool hydraulic oil, can also use other approximate specifications of the oil's kinematic viscosity (100 °C) 11-14 centistokes.
4. Filling and draining the oil The air filter on the tank is opened. The oil is filled into the tank. The amount of oil injected once is about 24 kg. The specifications of the used oil can be found in the specification of the oil. When the oil is drained, open the nozzle on the left bottom of the dynamometer. The service life of the oil is determined according to the climate of each place. If the oil is found to be deteriorating or dirty, it should be replaced with new oil.
5. The electrical device of the electrical tensile testing machine is in the dynamometer. The power supply is three-phase four-wire system. The circuit between the main body and the dynamometer is connected by a plug. Before the power is turned on, the dust and other impurities in the electrical box should be cleaned. Clean, after the introduction of the power cord, press the "power" button on the dynamometer panel light to prove that the power supply has begun, then press the pump start button, observe the direction of rotation of the motor, and then press the jaws seat lift button, check Whether the lifting action of the lower jaw seat is consistent with the text shown on the button, and check whether each limit is a function of the switch.
6, lubrication can be poured on the lower jaw screw on the lubricant, so that the screw and the screw nut is lubricated, the base with a hole, is to inject oil into the oil between the worm, the oil within the oil The scale can be measured with a measuring needle, and the maximum oil level of the oil rake can not exceed the lower flat portion of the oil measuring needle. The lower end of the needle is the lowest oil level in the oil pocket.
7. The initial operation of the oil pump and press the button on the dynamometer top to start or stop the rotation of the oil pump. When the first time after installation or change of wire joints, check whether the oil flow of the oil pump is smooth.
8, safety device tensile testing machine body cylinder and hydraulic chucks are equipped with protection relief valve and limit switch.
9, must pay attention to when operating 1 If the pump is suddenly stopped during the test process, this time the load should be removed to reduce the oil pressure, check and restart the pump for testing, should not start the pump under high pressure or Check the cause of the accident.
2 If the appliance malfunctions while the tensile tester is working and the start or stop button does not work, the power supply should be cut off immediately to stop the tester from operating.
3 It is forbidden for non-operating personnel to operate the machine.
10. Tensile force testing machine maintenance Tensile force testing machine should always wipe clean, wipe the clean after the application of a small amount of oil and then wipe it again to prevent rust, during the rainy season should pay attention to wipe, when not in use Dust cover to prevent dust intrusion. After each test, the test bench descends. It is better that the piston does not fall on the bottom of the cylinder, leaving a little distance for the next use. All valves on the dynamometer should not be opened to prevent dust from entering the interior and affect the sensitive performance of the measuring mechanism.
Tensile testing machine should be installed in a clean, dry, vibration-free room with room temperature of 20°C+/-10°C, and noticed that the beam bending test and the use of extensometer for testing and maintenance of equipment should be left around the testing machine. There is enough free space.
1. The main body and dynamometer of the tensile testing machine shall be installed on the basis of concrete. The basic dimensions shall be stipulated according to the appearance and foundation plan, leaving the anchor screw and the lower jaw screw hole and other wire installation pipelines and other devices. .
The upper plane of the foundation should be leveled and leveled up. After the foundation is dry, the testing machine is installed.
1 The installation of the tensile testing machine and the preliminary accuracy alignment The main body and the dynamometer are respectively transported to the foundation of concrete. The distance between the main body and the dynamometer is adjusted according to the appearance and the foundation map and the direction is adjusted. Then thin and thin can be used. The small pieces of iron were inserted into the main body and the lower part of the dynamometer (between the base), respectively, and were calibrated using a square level with a precision of 0.05/1000.
The initial alignment of the main body can be measured in two different vertical and horizontal positions of the two columns and measured with a square spirit level. The non-lead sag should not be greater than 0.3/1000. Then, a square spirit leveler can be used to locate the vertical and horizontal positions on the outer surface of the cylinder. Plumbness.
2 Precision test of tensile testing machine After correcting the initial accuracy of the testing machine, the initial running test is performed after connecting the oil pipe, power supply and oil filling. After the test is in good condition, the accuracy of the testing machine is corrected.
Use a square horizontal instrument to rest on the working platform, find the positive-sag of the cylinder, adjust or increase or decrease the horn below the base, so that the error cannot be greater than 0. 10/1000.
After the precision of the test machine is found, the cement paste is used to fill all the gaps below the base to maintain a good combination of the base and the cement foundation, so as to prevent the level of the test machine from being damaged due to vibration during use.
After the groundnuts are grouted, do not fasten the foot nuts and start the tester before the cement has dried. (Cement drying time is generally not less than 10-15 days.) After the cement is completely dry, fasten the handle nut and review the installation accuracy of the tester. Is it consistent with the accuracy of the alignment? If not, you should re-find it.
Tensile force testing machine in the use of the process, due to the vibration tends to produce loosening test, so the tension tester after a period of time, the relevant parts should be tightened.
2. When taking over the tubing connecting the main body and the dynamometer, the interior of the tubing should first be washed with kerosene to ensure the cleanliness of the oil circuit. It should be noted that the gasket at the joint is intact to prevent oil leakage at high pressure.
3, the oil specifications used in the hydraulic rotation, can use N68 precision machine tool hydraulic oil, can also use other approximate specifications of the oil's kinematic viscosity (100 °C) 11-14 centistokes.
4. Filling and draining the oil The air filter on the tank is opened. The oil is filled into the tank. The amount of oil injected once is about 24 kg. The specifications of the used oil can be found in the specification of the oil. When the oil is drained, open the nozzle on the left bottom of the dynamometer. The service life of the oil is determined according to the climate of each place. If the oil is found to be deteriorating or dirty, it should be replaced with new oil.
5. The electrical device of the electrical tensile testing machine is in the dynamometer. The power supply is three-phase four-wire system. The circuit between the main body and the dynamometer is connected by a plug. Before the power is turned on, the dust and other impurities in the electrical box should be cleaned. Clean, after the introduction of the power cord, press the "power" button on the dynamometer panel light to prove that the power supply has begun, then press the pump start button, observe the direction of rotation of the motor, and then press the jaws seat lift button, check Whether the lifting action of the lower jaw seat is consistent with the text shown on the button, and check whether each limit is a function of the switch.
6, lubrication can be poured on the lower jaw screw on the lubricant, so that the screw and the screw nut is lubricated, the base with a hole, is to inject oil into the oil between the worm, the oil within the oil The scale can be measured with a measuring needle, and the maximum oil level of the oil rake can not exceed the lower flat portion of the oil measuring needle. The lower end of the needle is the lowest oil level in the oil pocket.
7. The initial operation of the oil pump and press the button on the dynamometer top to start or stop the rotation of the oil pump. When the first time after installation or change of wire joints, check whether the oil flow of the oil pump is smooth.
8, safety device tensile testing machine body cylinder and hydraulic chucks are equipped with protection relief valve and limit switch.
9, must pay attention to when operating 1 If the pump is suddenly stopped during the test process, this time the load should be removed to reduce the oil pressure, check and restart the pump for testing, should not start the pump under high pressure or Check the cause of the accident.
2 If the appliance malfunctions while the tensile tester is working and the start or stop button does not work, the power supply should be cut off immediately to stop the tester from operating.
3 It is forbidden for non-operating personnel to operate the machine.
10. Tensile force testing machine maintenance Tensile force testing machine should always wipe clean, wipe the clean after the application of a small amount of oil and then wipe it again to prevent rust, during the rainy season should pay attention to wipe, when not in use Dust cover to prevent dust intrusion. After each test, the test bench descends. It is better that the piston does not fall on the bottom of the cylinder, leaving a little distance for the next use. All valves on the dynamometer should not be opened to prevent dust from entering the interior and affect the sensitive performance of the measuring mechanism.
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