Flux-cored wire powder cutting control method and control device
A technology of flux-cored welding wire and control method, which is applied in program control, computer control, general control system, etc., can solve the problems of unstable operation, long response time of the follower system, and easily disturbed signals, and meets the guarantee process requirements, The effect of less susceptible to disturbed operation
Active Publication Date: 2016-01-27
TIANJIN YONGCHANG WELDING WIRES
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Problems solved by technology
Disadvantages of the above two control methods: the signal is susceptible to interference, the operation is unstable and the response time of the servo system is long
Method used
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[0027] like Figure 1-3 As shown, a flux-cored wire powder cutting control device includes a touch screen, PLC, servo motor, servo motor driver and servo encoder. The specific connection relationship of each part is as follows: figure 1 As shown, the PLC is connected to the touch screen through the RS232 interface, the servo motor driver is connected to the servo motor, the PLC is connected to the servo motor driver through the RS485 interface, and the servo encoder (encoder selects 2000 pulses / rev) is used to measure and form online. The running speed of the machine (steel belt) is used as the pulse given speed of the servo motor driver to control the feeder, and the RS485 communication between the PLC and the servo driver and the RS232 communication between the PLC and the touch screen are used to complete input parameters from the touch screen to change the electronic gear ratio of the drive. The parameter K value (when the PLC writes the data K to the servo motor driver RA...
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The invention provides a method and device for controlling feeding of flux powder of a flux-cored wire. The method for controlling feeding of the flux powder of the flux-cored wire comprises the following steps that the critical speed value is determined; the weight G of the flux powder which is fed in a timing mode is determined when the speed, generated in no-load running, of a forming machine is larger than the critical speed; the speed between 0 and the critical speed is divided into a plurality of speed sections, and the theoretical feeding amount Gn of the flux powder of each speed section is worked out; the actual feeding amount Sn of the flux powder of each speed section is measured; the electronic gear ratio Kactual is worked out based on a formula, the electronic gear ratio of a driver of a servo motor is controlled to be Kactual through a PLC, and the speed of a feeder is controlled through control over the speed of the servo motor. The device for controlling feeding of the flux powder of the flux-cored wire comprises a touch screen, the PLC, the servo motor and the driver of the servo motor, wherein communication between the PLC and the driver of the servo motor and communication between the touch screen and the driver of the servo motor are achieved through a 232 interface and a 485 interface respectively. The signal of the device for controlling feeding of the flux powder of the flux-cored wire is free of interference, operation is stable, the control accuracy is high, and the response time is short. By the adoption of the method for controlling feeding of the flux powder of the flux-cored wire, the filling rate is kept constant.
Description
technical field [0001] The invention belongs to the field of flux-cored wire production equipment, and in particular relates to a method for controlling feeding of flux-cored wire powder. Background technique [0002] At present, the rolling mills that produce flux-cored wire products have inconsistent filling rate values when the machine is running at high and low speeds, and the maximum error can reach about 30℅. Directly affect the quality of flux cored wire products. Because when the feeder is running at low speed, the powder flow rate is slow, and the powder accumulation density in the feeder is high. When the feeder is running at high speed, the powder flow rate is fast, and the powder accumulation density in the feeder is small. When running at high and low speeds, the volume of the powder discharged per unit time from the follow-up feeder is the same, but the density of the discharged powder is different, that is, the weight of the powder discharged per unit time ...
Claims
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IPC IPC(8): G05B19/401
Inventor 郝建
Owner TIANJIN YONGCHANG WELDING WIRES