Variety: small, medium and heavy Expanded Metal Mesh. Expanded aluminum mesh, expanded platinum filtration mesh, expanded brass mesh, expanded copper mesh, expanded stainless steel mesh, expanded nickel mesh. Opening in the shape of diamond, hexagonal or special shape.
Long way of mesh: TB: 12.5-200mm
Short way of mesh: 5-80mm
Thickness: d: 0.5-8mm
Expanded metal mesh at length from 600-4000mm and width from 600-2000mm
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2. List all the factors that may cause failure The reasons for the occurrence of the same type of failure in the CNC grinding machine may be various, mechanical, electrical, and control systems, and so on. Therefore, all factors related to the failure analysis should be taken into consideration. List it out. For example, when the X-axis of the machine tool moves, jitter may occur. The factors that may cause this phenomenon are: a. The connection of the X-axis encoder may be in poor contact; b. The island rail of the X-axis is too tight and the damping is too large. Cause X-axis motor load is too large; c, X-axis servo motor and screw coupling loose or gap; d, X-axis motor servo drive problems; e, X-axis servo motor failure and so on.
3. How to determine the cause of the fault The variety of numerical control systems of the CNC grinding machine but no matter what kind of CNC system, the following methods can be used to comprehensively judge the fault.
(1) Intuitive method: It is to use human senses to pay attention to the phenomenon at the time of failure and to determine the possible location of the failure. If there is any abnormal noise or spark at the time of the fault, where is the chewy bit, where there is an abnormal heating phenomenon, and then further observe the surface condition of each circuit board that may be faulty, such as whether there is Whether the charred, smoked black parts or electronic components have bursts to further narrow the inspection range. This is the most basic and simplest method, but it requires the maintenance personnel of the machine to have a certain maintenance experience.
(2) Use the hardware alarm function of the CNC system: The alarm indicator can determine the fault. There are many alarm indicators on the hardware circuit board of the numerical control system, so as to roughly determine the location of the fault.
(3) Make full use of the software alarm function of CNC system: CNC system has self-diagnostic function. During system operation, the system can be quickly diagnosed with the self-diagnosis program. Once a fault is detected, the fault is immediately displayed in the form of an alarm on the form screen or each alarm light is lit. When the maintenance is performed, the fault of the machine tool can be found based on the alarm content prompt.
(4) Diagnostic functions using status display: The CNC system can not only display fault diagnosis information, but also provide various statuses of machine tool diagnosis in the form of diagnosis address and diagnosis data, for example, providing an interface between the system and the machine tool. Input/output signal status, or the input/output signal status of the interface between the PC and the CNC device and between the PC and the machine tool, you can use the status display of the display screen to check whether the CNC system inputs the signal to the machine tool, or Whether the switch information of the machine tool has been input to the CNC system. In short, the fault can be distinguished on the side of the machine or on the side of the CNC, so that the inspection range of the fault of the CNC machine can be reduced.
(5) In the event of a fault, the parameters of the CNC system should be immediately checked: Changes in the system parameters will directly affect the performance of the machine tool, and even cause the machine tool to malfunction. The entire machine tool cannot work. The external disturbances may cause changes in individual parameters in the memory, so that when the machine tool has some inexplicable faults, the parameters of the numerical control system can be checked.
(6) Replacement of spare parts: When the failure analysis of the machine tool reveals that there may be even a fault in the circuit board, the spare part board can be used for replacement, and the faulty circuit board can be quickly determined. However, when using this method, the following two points need to be noted: 1 Pay attention to the position of the adjustable switches on the circuit board. When changing the board, make sure that the setting status of the two circuit boards to be exchanged is exactly the same, otherwise Makes the system unstable or not optimal, even alarming. 2 After replacing some circuit boards (such as the CCU board), you need to reset or input the machine parameters and programs.
(7) Using the detection terminal on the circuit board: There are detection terminals for measuring the voltage and waveform of the circuit on the circuit board so that it can be determined whether the circuit operation is normal during debugging and maintenance. However, in the detection of this part of the circuit should be familiar with the circuit principle and the logic of the circuit. In the case of unfamiliar logic, two identical boards can be used for comparison to detect the fault of the board.
In short, when the CNC machine tool fails, the maintenance personnel can correctly determine the cause of the fault and the location of the fault by following the above detection procedures and methods.
Flattened Expanded Metal
Use: Used with concrete in buildings and construction, maintenance of equipments, making of arts and crafts, covering screen for first class sound case. Also fencing for super highway, studio, highway. Heavy expanded metal can be used as step mesh of oil tanks, working platform, corridor and walking road for heavy model equipment, boiler, petroleum and mine well, automobile vehicles, big ships. Also serve as reinforcing bar in construction, railway and bridges.
1. A full investigation of the fault site When a fault occurs, first of all to fully understand the machine fault is under what circumstances, when there are some phenomena, after the emergence of the operator to take what kind of measures, such as the fault site still, it is necessary Carefully observe the contents of the CNC to understand the content of the program segment being executed and the alarm content displayed by the self-diagnosis, and observe the alarm lights on each circuit board. Then press the system's reset button to see if the fault disappears. If the fault alarm disappears, such alarms are mostly software faults.
September 13, 2019