The characteristics of fiber laser cutting machine in use
Designed a mechanical lifting table based on eccentric wheel mechanism applied to fiber laser cutting machine, introduced its structural characteristics, working principle and design points in more detail, and performed kinematics on it using ADAMS software In simulation, the technical solution of fiber laser cutting machine has the following characteristics:
The structure of fiber laser cutting machine is simple and synchronous. The lifting action of the lifting platform can be realized by simple mechanical transmission. Due to the rigid connection between the 4 eccentric gears, even under severe eccentric load conditions. It can also ensure the synchronization of the movement of the 4 eccentric gears.
There is no set of theoretical calculation methods that can be used in the calculation methods of modern raise drilling rigs. Therefore, we analyzed and summarized the collected data, and obtained the calculation formula by fitting it, which is basically feasible after verification. In short, we have discussed the problem of reasonable selection of the working parameters of raise rigs as above. However, since the data is not too much and the practical data is also limited, the working parameters of raise rigs and their mutual relationship and calculation methods will still be discussed in the future. A lot of work needs to be done.
So. First, run the industrial computer alone, and repeatedly operate the computer under the DOS system. The computer runs normally, indicating that the industrial computer is not faulty. Disconnect the 232 serial communication cable and observe the start-up process of the single-chip microcomputer unit, observe the CPU board working indicator, the CPU board indicator flashes normally until the industrial computer DOS system is booted, the CPU status indicator stops in the fault state when the machine control system is loaded (The CPU is actually waiting for the response from the industrial computer). It can be analyzed that the stand-alone unit is basically normal, and the question may be in the communication link between the industrial computer and the single-chip computer. Because the industrial computer OS system needs to load the machine tool control system data after the completion of the boot, the data is lost. At this time, the display shows a blue screen when there is no signal. The industrial computer needs to run the machine tool operating system on the DOS platform, and the system is not operated due to the disconnection of communication. reaction.
Check if the 232 serial communication cable and interface are not abnormal, the problem may be in the communication data sending and receiving circuit. Use the industrial computer 232 serial communication interface to find the MCU communication along the cable Interface, the interface is on the single-chip CPU board. If there is no system electrical drawing, look up the data transmission and reception control chip along the interface pins. It is learned that the CPU board transmission and reception control circuit consists of 2 MAX232N serial data transceivers and 4 HCPL2630 The photoelectric coupler chip is composed. There is no abnormality in the static measurement chip. Weld extension wires on the 16-pin VCC and 15-pin GND pins of the MAX232N chip power supply. Power on and measure the working voltage. It is found that a voltage of DC2.4V should be around DC5V, which is obviously abnormal. The board failure appears as a blue screen. Another spare part of the CPU board is powered on and the measured voltage gradually decays from DC4.94V to 0V. The failure of this board is manifested by the slow response of the system operation until the operation does not respond.
The cause of the failure of the fiber laser cutting machine is found to be the abnormal power supply of the 232 serial communication circuit. It is the data exchange control circuit between the industrial computer and the single-chip computer. Through the analysis of the CPU board 232 serial communication power supply circuit, the power supply is provided by the IBEK5ICR1-05-NDC-DC converter module. Its function is to convert the CPU board DC5V system power supply to DC5V for the 232 serial communication circuit to be used alone, and combined with the HCPL2630 photocoupler Realize the electrical isolation between the industrial computer and the single-chip computer. The electrical parameters of this DC-DC converter module are searched online for 5V, 1W, 200mA. Remove the DC-DC converter module and energize it with a dummy load (1W, 30 ohm resistance). The phenomenon is consistent with the on-site measurement results. The conclusion is The performance is degraded and it is damaged and needs to be replaced.