Servo control device and method for disc gap in disc powder grinding system

Abstract

Provided is a disc gap servo control device and method for a powder grinding system, which includes a disc powder grinding machine, a rotating speed regulating device of a rotating disc, the disc gap servo control device and a control cabinet. The method includes the following steps of: (1) inputting a control information; (2) an industrial computer obtaining a current disc gap and displaying the disc gap on a touch screen; (3) the disc gap servo control device adjusting the disc gap; (4) the current disc gap reaches a target disc gap; and (5) a frequency converter controlling a motor rotating speed, so that the actual rotating disc rotating speed can reach a target rotating speed of the rotating disc. The operation parameters of the rotating disc are observed by the industrial computer in real time, and finally a high-precision servo control of the disc gap can be realized.

Claims

1. A control method for a disc gap servo control device for a disc powder grinding system, the method comprising the following steps: step 1, inputting a control information to an industrial computer through a touch screen, wherein the control information comprises a target rotating disc rotating speed and a target disc gap; step 2, transmitting a position information to the industrial computer through a position sensor, so that the industrial computer obtains a current disc gap accordingly and displays the disc gap on the touch screen; step 3, using the industrial computer to generate a control command according to a difference value between the current disc gap and the target disc gap and control a disc gap servo control device to adjust a disc spacing, which specifically comprises the following steps that: step 3.1, the industrial computer generates the control command according to the difference value between the current disc gap and the target disc gap, and controls an AC servo motor to rotate accordingly; and step 3.2, the AC servo motor is decelerated by a decelerator, drives a mechanical linkage, and further drives a rotating shaft and a rotating disc to move horizontally for a certain distance, so as to realize precise control of the disc spacing; step 4, repeating the steps 2-3 until the current disc gap reaches the target disc gap, then going to the next step; and step 5, controlling a rotating speed of a driving motor by the industrial computer through a frequency converter according to a target rotating disc rotating speed, and further controlling the rotating disc rotating speed, so that an actual rotating disc rotating speed can reach the target rotating disc rotating speed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematically structural diagram of a disc gap servo control device for a disc powder grinding system according to an embodiment of the present invention; and

(2) FIG. 2 is a side view of FIG. 1.

(3) In the drawings: 1 indicates grinding chamber; 2 indicates disc powder grinding machine; 3 indicates rotating shaft; 4 indicates AC servo motor; 5 indicates transmission device; 6 indicates touch screen; 7 indicates control cabinet; 8 indicates feed opening; 9 indicates discharge opening; and 10 indicates driving motor.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(4) To make the objectives, technical scheme and advantages of the present invention more clearly, the present invention is described in details below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are merely illustrative of the present invention without limiting the present invention.

(5) The present invention provides a disc gap servo control device for a disc powder grinding system, as shown in FIG. 1 and FIG. 2, the disc powder grinding system comprising: a disc powder grinding machine 2, a rotating speed regulating device of a rotating disc, the disc gap servo control device and the control cabinet 7.

(6) The control cabinet 7 comprises a touch screen 6, an industrial computer 71 and a programmable controller 72.

(7) The touch screen 6 is connected with the industrial computer 71, and a control information is input to the industrial computer 71 through the touch screen 6.

(8) The industrial computer 71 is connected with the programmable controller 72, and a working state of the control device is controlled by the programmable controller 72; the industrial computer 71 is connected with the rotating speed regulating device of the rotating disc and the disc gap servo control device and receives a working state information of the control device, and the working state information is displayed on the touch screen 6.

(9) The programmable controller 72 is connected with and controls the rotating speed regulating device of the rotating disc and the disc gap servo control device.

(10) The programmable controller 72 controls the rotating speed regulating device of the rotating disc and the disc gap servo control device according to a control command of the industrial computer 71.

(11) A feed opening 8 and a discharge opening 9 are disposed in a grinding chamber 1 of the disc powder grinding machine 2, and a rotating disc and a static disc are arranged in the grinding chamber 1, wherein a center of the rotating disc is fixedly connected with a rotating shaft 3; the static disc is fixed inside the grinding chamber 1.

(12) The rotating shaft 3 is connected with the rotating speed regulating device of the rotating disc.

(13) The rotating speed regulating device of the rotating disc comprises a driving motor 10; the rotating speed regulating device of the rotating disc forms a transmission connection with the rotating shaft 3 through a conveyor belt, and drives the rotating disc through the rotating shaft 3 to provide power for the disc powder grinding machine.

(14) The disc gap servo control device comprises an AC servo motor 4, a transmission device 5 and a position sensor.

(15) The transmission device 5 comprises a decelerator 51 and a mechanical linkage 52, wherein the mechanical linkage 52 is connected with the rotating shaft 3.

(16) One end of the decelerator 51 is connected to the AC servo motor 4, and the other end of the decelerator 51 is connected to the mechanical linkage 52; the decelerator 51 is used for converting the power of the AC servo motor 4 into the power that drives the mechanical linkage 52 to move horizontally, so as to control a spacing between the rotating disc and the static disc.

(17) The position sensor is mounted on the mechanical linkage 52 of the disc powder grinding machine 2, a position signal of the rotating disc is collected in real time with a position movement of the mechanical linkage 52, and the position signal is fed back to the control cabinet 7.

(18) The disc powder grinding machine 2 is a double-disc powder grinding machine.

(19) The diameters of the static disc and the rotating disc, the specification of the driving motor 10, and the rotating speed of the rotating disc are determined according to the actual production efficiency and material hardness. In the embodiment, the diameters of the static disc and the rotating disc are 500 mm; and the driving motor 10 is a three-phase asynchronous motor, of which the power is 3 kW and the rotating speed is 0-3000 r/min.

(20) In the embodiment, the power of the AC servo motor 4 is 1 kW.

(21) The rotating speed regulating device of the rotating disc further comprises a frequency converter.

(22) The frequency converter is connected with the driving motor 10 and the programmable controller 72 of the control cabinet 7, wherein the programmable controller 72 controls the frequency converter according to a control command of the industrial computer 71, so as to control the rotating speed of the driving motor.

(23) A disc gap servo control method for a disc powder grinding system, which adopts the disc gap servo control device for the disc powder grinding system, comprises the following steps of:

(24) Step 1, inputting a control information to the industrial computer 71 through the touch screen 6, wherein the control information comprises a target rotating disc rotating speed and a target disc gap;

(25) Step 2, transmitting a position information to the industrial computer 71 through the position sensor, so that the industrial computer 71 obtains a current disc gap accordingly and displays the disc gap on the touch screen 6;

(26) Step 3, using the industrial computer 71 to generate a control command according to a difference value between the current disc gap and the target disc gap and control the disc gap servo control device to adjust a disc spacing, which specifically comprises the following steps that:

(27) Step 3.1, the industrial computer 71 generates the control command according to the difference value between the current disc gap and the target disc gap, and controls the AC servo motor 4 to rotate accordingly; and

(28) Step 3.2, the AC servo motor 4 is decelerated by the decelerator 51, drives the mechanical linkage 52, and further drives the rotating shaft 3 and the rotating disc to move horizontally for a certain distance, so as to realize precise control of the disc spacing;

(29) Step 4, repeating the steps 2-3 until the current disc gap reaches the target disc gap, then going to the next step; and

(30) Step 5, controlling the rotating speed of the driving motor by the industrial computer 71 through the frequency converter according to the target rotating disc rotating speed, and further controlling the rotating disc rotating speed, so that the actual rotating disc rotating speed can reach the target rotating disc rotating speed.