Fault (1): the cylinder of aluminum profile extrusion press machine extruder cannot be compressed, the extrusion action cannot be carried out, and the system pressure displayed on the console is normal
The conditions under which the extruded pipe cannot maintain pressure are:
1。 System piping connections or hydraulic piping leaks. If the pipeline flow is too large, the system will not be able to establish sufficient pressure. Even if the pressure can be established, the pump will stop working after the cylinder pressure drops sharply;
2。 The spring of the safety valve at the outlet of the main pump is softened, aged or stuck. The safety valve cannot be set with sufficient working pressure, so that the pressure of the main system cannot meet the requirements of the design drawings.
3。 The performance parameters of each pump do not meet the requirements and the operation is abnormal. The oil supply pressure of the oil pump does not meet the design requirements;
1。 Check whether there is oil overflow and oil overflow in the hydraulic pipeline. Ensure that the oil pipe joint is firmly connected and does not drain the oil point, so as to eliminate the oil leakage caused by the fault.
2。 The pressure gauge is used to check whether the outlet pressure of the main pump is normal. The tank top is provided with a main pump pressure regulating valve block. Install a pressure gauge on the hydraulic connector according to the label on the hydraulic chart and check the pressure of the main pump. Ensure that the pressure of the main pump meets the design requirements and eliminate the faults caused by insufficient pressure of the main pump;
3。 Restart the control pump, lock the pump and main pump, carefully check whether the pump has abnormal sound, and observe whether the pump sound is stable without sharp or noisy abnormal sound, which can eliminate the problem of oil pump;
Fault (2): in the extrusion process, the extruder is automatically selected, and a single extruder cannot operate according to the automatic program.
The conditions under which the extruder does not execute automatically are:
1。 The operator does not select the automatic status button, the mechanism does not comply with the automatic initial state or the corresponding sensor is abnormal. For example, the spindle device, washer lubrication device, etc. do not return to the automatic state position;
2。 After the automatic operation of the operating mechanism is completed, the extruder does not reset. If a mechanism fails to complete the action, the operator switches to manual or adjusts some unfinished actions. For example, the encoder control action needs to return to the set before the reset action;
Due to the vibration caused by the position displacement of the sensor, the sensor does not send the generated signal. The mechanism fails to reach the set value of the program, cannot complete the operation, and cannot automatically enter the next operation.
1。 Reset the extruder: open the console touch screen, check the sensor interface, check the signal indication of each sensor, check the operation mode knob of the extruder, select it correctly, and check whether there is a signal;
2。 Check whether the pressure display value of the extruder panel is consistent with the pressure mechanical gauge, whether it meets the automatic conditions, check the size of the encoder mechanism, whether it is abnormal, and whether the program monitors the action of any mechanism. Reset completed;
3。 Check the physical object, such as a loose sensor, and measure the encoder stroke with a ruler, which does not match the actual action because the sensor and signal exist in some places. The connection between the three cable shield wires and the ground wire is loose, and the connector of the proportional valve leaks oil. The anti-interference requirements of proportional valve signal are relatively strict.