Wideband sander current acquisition reciprocating grinding method

Abstract

The present application relates to a kind of wideband sander current collection reciprocating grinding method without detecting distance, whether the surface of the plate material to be ground needs reciprocating grinding, the main motor of wideband sander is equipped with current detector, the signal output end of the current detector is transmitted to PLC controller by wired or wireless mode, PLC controller is built-in main motor regrinding current parameter value, when the end of the plate material to be ground passes through the grinding head of wideband sander, PLC controller receives the current of main motor higher than the regrinding current parameter value set, and PLC controller instructs wideband sander to enter regrinding program;When the end of the plate material to be ground passes through the grinding head of wideband sander, the current of main motor received by PLC controller is lower than the regrinding current parameter value set, and the end of the plate material to be ground runs to the automatic stop of the outer frame of wideband sander, manually detects whether the grinding of plate material covers completely, if covering, then end;If not, adjust the height of conveying workbench and enter regrinding program.

Description

Technical Field

[0001] This invention relates to a method for collecting current for reciprocating grinding in a wide-band sander, which can determine whether the surface of a plate to be ground needs reciprocating grinding without requiring a detection distance. This method belongs to the field of wide-band sander manufacturing. Background Technology

[0002] In practical applications, surface treatment of sheet metal often requires repeated grinding to achieve the desired surface quality. For such sheets, reciprocating belt grinding machines are typically used. The conventional method involves the workpiece being ground and exiting the machine frame. Signals are detected by probes A and B at the machine's inlet and outlet before the next grinding cycle. In other words, the A and B signal probes are located outside the machine frame, and reciprocating grinding is achieved by detecting the distance between the probes and the workpiece. The problems with this method are: low equipment utilization and significant wasted time during idle periods. Summary of the Invention

[0003] Design objective: To overcome the shortcomings of the prior art, and to design a broadband sander current acquisition reciprocating grinding method that can determine whether the surface of the plate being ground needs reciprocating grinding without requiring a detection distance.

[0004] Design Scheme: To achieve the above design objectives, this invention is designed based on the characteristics of the main motor of the belt sander manufactured by the applicant. Because when the belt sander grinds a workpiece, its main motor operates under full load, with the motor current at or near the rated current; after the workpiece has finished grinding through the belt head, the motor is under light load or no load, and its motor current is also at a light load or no load. This invention utilizes the change in the operating current of the main motor of a wide-band sander as a reference point for determining whether the sander needs to switch to reciprocating grinding on the workpiece. This elevates the detection point setup on the outer frame, as in the prior art, to using the current change on both sides (points C and D) of the workpiece passing through the sanding head as the critical point for determining whether reciprocating grinding is necessary. The positive technical effect is that the workpiece can be examined without leaving the outer frame of the wide-band sander to determine whether the grinding result is satisfactory and whether re-grinding is required. This fundamentally avoids the defect in the prior art where the workpiece needs to be moved outside the frame for detection, significantly improving the processing efficiency of the wide-band sander. Tests have shown an efficiency increase of over 50%.

[0005] Technical Solution: A method for current acquisition and reciprocating grinding of a wide-band sander, comprising a wide-band sander and a PLC controller, wherein the wide-band sander drives the board to grind in the forward or reverse direction, characterized in that: the main motor of the wide-band sander is equipped with a current detector, the signal output of which is transmitted to the PLC controller via wired or wireless means. The PLC controller has built-in reciprocating grinding current parameter values ​​of the main motor. When the end of the board being ground passes the grinding head of the wide-band sander, if the current received by the PLC controller is higher than the set reciprocating grinding current parameter value, the PLC controller instructs the wide-band sander to enter the reciprocating grinding program; when the end of the board being ground passes the grinding head of the wide-band sander, if the current received by the PLC controller is lower than the set reciprocating grinding current parameter value, the end of the board being ground runs to the outer frame of the wide-band sander and automatically stops. The operator checks whether the grinding of the board material is fully covered. If it is covered, the process ends; if it is not covered, the height of the conveyor table is increased to enter the reciprocating grinding program.

[0006] Compared with the prior art, the present invention has the advantages of avoiding the idle operation of the plate being ground, thus greatly improving the utilization rate of the equipment and increasing the processing efficiency of the wide-band sander by more than 50%. This not only reduces processing costs but also improves economic benefits, achieving unexpected positive technical effects. Attached Figure Description

[0007] Figure 1 This is a schematic diagram illustrating the implementation of the reciprocating grinding method for current acquisition in a broadband sander.

[0008] Figure 2 This is a schematic diagram of the background technology. Implementation

[0009] Example 1: Refer to Appendix Figure 1 and 2 A method for current acquisition in reciprocating grinding using a wide-band sander includes a wide-band sander, a PLC controller 2, and the wide-band sander driving a sheet metal 5 (workpiece) for forward or reverse grinding. The main motor of the wide-band sander is equipped with a current detector. Figure 1(Not shown in the diagram) The signal output of the current detector is transmitted to the PLC controller via wired or wireless means. The PLC controller has built-in main motor re-grinding current parameter values. When the end of the plate being ground 5 passes through the grinding head 3 of the wide-band sander, if the main motor current received by the PLC controller 2 is higher than the set re-grinding current parameter value, the PLC controller instructs the wide-band sander to enter the re-grinding program. When the end of the plate being ground passes through the grinding head of the wide-band sander, if the main motor current received by the PLC controller is lower than the set re-grinding current parameter value, the end of the plate being ground runs to point 1 (A) (detection point, which outputs a signal to the PLC controller) or point 4 (B) (detection point, which outputs a signal to the PLC controller) of the wide-band sander frame, the PLC controller instructs the machine to stop automatically, and the manual inspection is performed to check whether the plate material is fully covered. If it is covered, the process ends; if it is not covered, the height of the conveyor table is increased to enter the re-grinding program.

[0010] Example 2: Based on Example 1, the end of the plate being ground runs to the outer frame of the wide-band sander and automatically stops. The laser probe detects the grinding surface of the plate material and transmits the detected data to the PLC controller for comparison with the detection parameters built into the PLC controller. If they match, the process ends; if they do not match, the PLC controller instructs the servo motor to raise the height of the conveyor table to the set parameters and instructs the wide-band sander to enter the re-grinding program.

[0011] Example 3: Based on Example 1, the end of the plate being ground runs to the outer frame of the wide-band sander and automatically stops. The CNC imaging device takes a picture of the ground surface of the plate material and transmits the picture data to the PLC controller for comparison with the parameters built into the PLC controller. If they match, the process ends; if they do not match, the PLC controller instructs the servo motor to raise the height of the conveyor table to the set parameters and instructs the wide-band sander to enter the re-grinding program.

[0012] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of the present invention, these textual descriptions are merely simple textual descriptions of the design concept of the present invention, and not limitations on the design concept of the present invention. Any combination, addition, or modification that does not exceed the design concept of the present invention falls within the protection scope of the present invention.

Claims

1. A wideband sander current acquisition reciprocating grinding method, comprising a wideband sander and a PLC controller, the wideband sander drives the forward grinding or the reverse grinding of a plate, characterized in that: The main motor of the wideband sander is provided with a current detector, the signal output end of the current detector is transmitted to the PLC controller through wired or wireless mode, the PLC controller is built-in with the main motor regrinding current parameter value, when the end of the plate to be ground passes through the grinding head of the wideband sander, if the main motor current received by the PLC controller is higher than the set regrinding current parameter value, the PLC controller instructs the wideband sander to enter the regrinding program; when the end of the plate to be ground passes through the grinding head of the wideband sander, if the main motor current received by the PLC controller is lower than the set regrinding current parameter value, the end of the plate to be ground runs to the outer frame of the wideband sander and automatically stops, manual detection is carried out on whether the plate material grinding is covered completely, if yes, the process is terminated; if not, the height of the conveying workbench is adjusted to enter the regrinding program. ​ 2. The wide belt sander current collection traverse grinding method of claim 1 wherein: The end of the plate to be ground runs to the outer frame of the wideband sander and automatically stops, the laser probe detects the plate material grinding surface and transmits the detected data to the PLC controller and the built-in detection parameter in the PLC controller for comparison, if the same, the process is terminated; if not, the PLC controller instructs the servo motor to adjust the height of the conveying workbench to the set parameter and instructs the wideband sander to enter the regrinding program.

3. The wide belt sander current collection traverse grinding method of claim 1 wherein: The end of the plate to be ground runs to the outer frame of the wideband sander and automatically stops, the numerical control imager takes a photo of the plate material grinding surface and transmits the photographed data to the PLC controller and the built-in parameter in the PLC controller for comparison, if the same, the process is terminated; if not, the PLC controller instructs the servo motor to adjust the height of the conveying workbench to the set parameter and instructs the wideband sander to enter the regrinding program.

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