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Current location: homepage > news information > common problem >What is the low temperature impact test procedure?

What are the operating procedures of low temperature impact testing machine?

Article source: Jinan HuiFu testing machine factory popularity: Time of publication: 15:25, March 29, 2018

"HuiFu" customer service and you briefly talk about the low temperature impact testing machine operating procedures.
Before low temperature impact test, check whether the whole machine (power connection mode, pendulum rotation direction, etc.) works normally. The main engine and electric control box must be well grounded, and the operating procedures of low temperature impact testing machine must be filled with enough anhydrous ethanol as required.

1. After unpacking and cleaning, move the testing machine to the pre-made foundation, adjust the level of the machine base to within 0.2/1000 with the level meter, and tighten the anchor screw.
 
2. Check whether all parts are intact and the rotating parts should be flexible.
 
3. Connect three-phase four wire system 50 Hz, 380 V power supply.
 
4. Low temperature impact testing machine operating procedures, the button box plug into the socket.
 
5. Turn on the power switch, the indicator light should be on, and the servo motor of the signal device should rotate anticlockwise (from the working position).
 
6. Press the switch on the manual control box to the "on" position, press the "swing" button, the main motor should rotate. (at this time, if the pendulum is found to rotate clockwise, stop and change the power phase). The electromagnetic clutch should be closed, the power is transmitted to the damping rod, and the microswitch should be in the relaxed state. At this time, the main motor should stop, the electromagnetic clutch will be disengaged, the safety pin will be extended, and the pendulum will lean against The dead weight is hung on the hanging and detaching mechanism. When the impact is needed, first press the "back pin" button, and then press the "impact" button. When the impact button is pressed, the valve is electrified with electromagnetic iron, and the jacking hanging pendulum mechanism is out of swing, the pendulum will fall and swing, impact automatically, swing up, hang swing, and the safety pin will extend. When it is necessary to put the swing, press and hold the "swing" button, the safety pin will return, the valve will be powered on with electromagnetic iron, the jacking hanging mechanism will rotate downward, the electromagnetic clutch will be closed, the main motor will rotate, and the pendulum will rotate clockwise To the vertical position, release the button to stop swing.
 
7. Check the null hit pointer to zero:
 
When the pendulum is in the vertical downward static position, adjust the position of the dial, and point the pointer to the 300 (150) J scale line. After taking the pendulum and impact (without putting the impact sample), the pointer should point to the 0-scale line.
 
8. Detection of friction loss
 
This is a check of energy loss due to friction. After adjusting the position of the pointer and the needle, first press the "take pendulum" button, take the pendulum → hang the pendulum, then press the "pin back" button, and then press and hold the "impact" button (or the button switch is turned to "off") to make the pendulum swing back to the empty position. When swinging to the highest position for the first time, quickly dial the pointer back to the left limit position of the scale plate by hand (pay attention not to touch the dial needle and the pendulum). After the pendulum pushes the pointer to the right of the dial again for the second time, the value indicated by the pointer can be recorded. The difference between the two times (the first time should be zero) divided by 2 is the friction consumed by the impact pendulum in the process of one swing The energy loss of resistance should not be more than 1.5 Joule for 300 Joule pendulum and 0.75 Joule for 150 Joule pendulum.
 
9. The support span and its relative position with the blade are adjusted.

 
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