High-speed profiling automatic pressure reduction control method and system for edge bonding machine

Abstract

The invention relates to the technical field of edge bonding machine profiling control, in particular to an edge bonding machine high-speed profiling automatic pressure reduction control method and system. A position detection and pressure relief triggering stage; an automatic pressure reducing and maintaining stage; a low-pressure profiling trimming stage; and a stroke completion and reset stage. The device is ingenious in design, and based on position pre-judgment and pneumatic logic control, automatic adjustment of air cylinder pressure is achieved by actively switching the air path state before a workpiece reaches a machining position, so that impact force under high-speed operation is reduced, the stability and safety of profiling machining are guaranteed, and the machining efficiency is improved. The technical effects of position pre-judgment, active pressure reduction and low-pressure pushing machining forming are achieved, so that the problems that workpieces are prone to collision damage and profiling is unstable under high-speed operation are solved, and the machining quality and the equipment reliability are improved advantageously.

Description

Technical Field

[0001] This invention relates to the field of edge banding machine contour control technology, and in particular to a high-speed contour automatic pressure reduction control method and system for edge banding machines. Background Technology

[0002] In the contouring process of an edge banding machine, the cylinder serves as a key actuator to drive the contouring mechanism. Traditional edge banding machines typically use a constant high-pressure air supply to ensure sufficient power output for the contouring and trimming operation of the workpiece. However, in practical applications, this high-pressure air supply method presents several problems: when the workpiece contacts the contouring component, the high pressure within the cylinder can cause severe impact to the workpiece, resulting in surface damage or deformation; furthermore, high-pressure operation not only increases the equipment's energy consumption but may also shorten the service life of components such as the cylinder. Summary of the Invention

[0003] This invention addresses the problems of existing technologies by providing a high-speed contouring automatic pressure reduction control method and system for edge banding machines. The design is ingenious, based on position prediction and pneumatic logic control. By actively switching the air circuit state before the workpiece reaches the processing position, the cylinder pressure is automatically adjusted, thereby reducing the impact force under high-speed operation and ensuring the stability and safety of contouring processing.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This invention provides a high-speed contour-following automatic pressure reduction control method for edge banding machines, which includes the following steps:

[0006] High-pressure rapid descent stage: When the contouring process is started, the first solenoid valve VY1 is energized, the air circuit is connected to the high-pressure air source, and the cylinder body moves rapidly downward under the action of full pressure, entering the working standby state, waiting for the workpiece to be sent from the edge banding machine conveyor belt.

[0007] Position detection and pressure relief triggering stage: When the workpiece enters the conveyor belt and triggers the start induction switch, the system starts the edge banding machine encoder to calculate the displacement; when the workpiece moves to the preset contouring position, the system determines that a pressure relief operation is required, and then controls the second solenoid valve YV2 to be energized;

[0008] Automatic pressure reduction and pressure holding stage: After the second solenoid valve YV2 is energized, the original high-pressure air supply path is closed, and at the same time, the pressure relief channel VT2 is quickly opened to allow the high-pressure gas in the cylinder to be discharged rapidly; after the pressure relief is completed, the system maintains the low pressure threshold set by the pressure relief channel VT2 to keep the cylinder body in a stable pressure state.

[0009] Low-pressure contour trimming stage: The workpiece continues to move forward under the conveyor belt of the edge banding machine, pushing the contouring component in a low-pressure state. The residual pressure in the cylinder body is used to smoothly push the workpiece out and make it fit tightly against the film, thus completing the contour trimming action.

[0010] Stroke completion and reset phase: When the cylinder body pushes the workpiece to the position set by proximity switch SP3, the system determines that the contour trimming is complete, and then controls the air circuit to return to the initial state. The cylinder body returns, and the contouring process re-enters the standby state waiting for the workpiece, ready for the next cycle.

[0011] This invention also provides a high-speed contouring automatic pressure reduction control system for an edge banding machine, comprising a cylinder body, a PLC control unit, a pressure relief channel VT1, a pressure relief channel VT2, a three-way pipe, a first solenoid valve YV1, and a second solenoid valve YV2. The PLC control unit is connected to the first solenoid valve YV1, the second solenoid valve YV2, the pressure relief channel VT1, the pressure relief channel VT2, and the positioning encoder signal of the edge banding machine. The front air port of the cylinder body is connected to one end of the pressure relief channel VT1, and the other end of the pressure relief channel VT1 is connected to the first solenoid valve YV1. The rear air port of the cylinder body is connected to the pressure relief channel VT2 through the three-way pipe. The high-pressure air source passes through the first solenoid valve YV1 and the second solenoid valve YV2 once and is then connected to the three-way pipe.

[0012] When the first solenoid valve YV1 is energized, the air circuit is connected to the high-pressure air source. The air pressure passes through the second solenoid valve YV2 and the three-way pipe in sequence and enters the cylinder from the rear air port of the cylinder body. The air pressure at the front of the cylinder body is discharged from the front air port of the cylinder body through the pressure relief channel VT1.

[0013] When the workpiece moves to the pre-set contouring position in the edge banding machine, a signal is sent to the PLC control unit to perform a pressure reduction operation, which controls the second solenoid valve YV2 to be energized. When the second solenoid valve YV2 is energized, the original high-pressure air supply path is closed, and at the same time, the rapid pressure relief channel VT2 is opened, so that the high-pressure gas in the cylinder body is discharged from the rear air port of the cylinder body through the three-way pipe and the rapid pressure relief channel VT2.

[0014] The pressure relief channel VT2 is equipped with a low pressure threshold. When the air pressure reaches the low pressure threshold, the pressure relief channel VT2 is closed.

[0015] The automatic pressure reduction device also includes a proximity switch SP3. When the proximity switch SP3 detects that the cylinder body has pushed the workpiece to the position set by the proximity switch SP3, the PLC control unit determines that the contour trimming is complete. The PLC control unit then controls the air circuit to return to its initial state, the cylinder body returns, and the contouring mechanism of the edge banding machine re-enters the standby state waiting for the workpiece. The beneficial effects of this invention are:

[0016] This invention is ingeniously designed. Based on the encoder positioning of the edge banding machine, and combined with the control of the first solenoid valve, the second solenoid valve, and the pressure relief channel VT2, the high-pressure air supply is cut off and the pressure is rapidly released before the workpiece reaches the processing area, retaining only the low pressure required to maintain the operation. This allows the workpiece to complete contouring and trimming under low impact force, achieving the technical effects of pre-judgment position, active pressure reduction, and low-pressure-driven processing. This solves the problems of workpiece damage and unstable contouring under high-speed operation, thus improving processing quality and equipment reliability. Based on position prediction and pneumatic logic control, this invention automatically adjusts the cylinder pressure by actively switching the air circuit state before the workpiece reaches the processing position, thereby reducing the impact force under high-speed operation and ensuring the stability and safety of contouring processing. Attached Figure Description

[0017] Figure 1 This is a flowchart of a high-speed contour automatic pressure reduction control method for an edge banding machine according to the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of a high-speed contour automatic pressure reduction control system for an edge banding machine according to the present invention.

[0019] Figures 1 to 2 The reference numerals in the accompanying drawings include:

[0020] 100. Cylinder body; 200. T-pipe. Detailed Implementation

[0021] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0022] Example 1

[0023] In Embodiment 1 of this application, as Figure 1 As shown, a high-speed contour-following automatic pressure reduction control method for an edge banding machine is characterized by comprising the following steps:

[0024] High-pressure rapid descent stage: When the contouring process starts, the first solenoid valve VY1 is energized, the air circuit is connected to the high-pressure air source, and the cylinder body moves rapidly downward under full pressure, entering the working standby state, waiting for the workpiece to be sent from the edge banding machine conveyor belt; this stage uses high pressure to achieve rapid response and improve production efficiency.

[0025] Position detection and pressure relief triggering stage: When the workpiece enters the conveyor belt and triggers the start induction switch, the system starts the edge banding machine encoder to calculate the displacement; when the workpiece moves to the pre-set contouring position (i.e. the critical point before contacting the contouring component), the system determines that a pressure relief operation is required, and then controls the second solenoid valve YV2 to be energized.

[0026] Automatic pressure reduction and holding stage: After the second solenoid valve YV2 is energized, the original high-pressure air supply circuit is closed, and at the same time, the pressure relief channel VT2 is quickly opened to allow the high-pressure gas in the cylinder to be discharged rapidly. After the pressure relief is completed, the system maintains the low pressure threshold set by the pressure relief channel VT2 to keep the cylinder body in a stable pressure state. The key to this stage is to release pressure in advance to avoid the workpiece and the contouring part from being violently impacted by high pressure at the moment of contact.

[0027] Low-pressure contour trimming stage: The workpiece continues to move forward under the conveyor belt of the edge banding machine, pushing the contouring component in a low-pressure state. The residual pressure in the cylinder body is used to smoothly push the workpiece out and make it fit tightly against the film, completing the contour trimming action. Since the pressure has been greatly reduced, it effectively prevents the workpiece from being damaged or deformed due to excessive impact.

[0028] Stroke completion and reset phase: When the cylinder body pushes the workpiece to the position set by proximity switch SP3, the system determines that the contour trimming is complete, and then controls the air circuit to return to the initial state. The cylinder body returns, and the contouring process re-enters the standby state waiting for the workpiece, ready for the next cycle.

[0029] This application's embodiment is ingeniously designed. Based on the encoder positioning of the edge banding machine, combined with the control of the first solenoid valve, the second solenoid valve, and the pressure relief channel VT2, the high-pressure air supply is cut off and the pressure is quickly released before the workpiece reaches the processing area, retaining only the low pressure required to maintain the operation. This allows the workpiece to complete contouring and trimming under low impact force, achieving the technical effects of pre-judgment position, active pressure reduction, and low-pressure push processing. This solves the problems of workpiece damage and unstable contouring under high-speed operation, which is beneficial to improving processing quality and equipment reliability. Based on position prediction and pneumatic logic control, this application's embodiment achieves automatic adjustment of cylinder pressure by actively switching the air circuit state before the workpiece reaches the processing position, thereby reducing the impact force under high-speed operation and ensuring the stability and safety of contouring processing.

[0030] Example 2

[0031] In Embodiment 2 of this application, a high-speed contour-following automatic pressure reduction control system for an edge banding machine is provided, such as... Figure 2As shown, it includes a cylinder body 100, a PLC control unit (not shown in the figure; this PLC control unit is a PLC control unit used in edge banding machines, which is conventional technology and will not be described in detail here), pressure relief channels VT1 and VT2, a three-way pipe 200, a first solenoid valve YV1 and a second solenoid valve YV2. The PLC control unit is connected to the first solenoid valve YV1, the second solenoid valve YV2, the pressure relief channels VT1 and VT2, and the positioning encoder signal of the edge banding machine. The front air port of the cylinder body is connected to one end of the pressure relief channel VT1, and the other end of the pressure relief channel VT1 is connected to the first solenoid valve YV1. The rear air port of the cylinder body 100 is connected to the pressure relief channel VT2 through the three-way pipe. The high-pressure air source passes through the first solenoid valve YV1 and the second solenoid valve YV2 once and is connected to the three-way pipe 200.

[0032] When the first solenoid valve YV1 is energized, the air circuit is connected to the high-pressure air source. The air pressure passes through the second solenoid valve YV2 and the three-way pipe 200 in sequence and enters the cylinder from the rear air port of the cylinder body 100. The air pressure at the front end of the cylinder body 100 is discharged from the front air port of the cylinder body 100 through the pressure relief channel VT1.

[0033] When the workpiece moves to the pre-set contouring position in the edge banding machine, a signal is sent to the PLC control unit to perform a pressure reduction operation, which controls the second solenoid valve YV2 to be energized. When the second solenoid valve YV2 is energized, the air supply path of the original high-pressure air source is closed, and at the same time, the rapid pressure relief channel VT2 is opened, so that the high-pressure gas in the cylinder body is discharged from the rear air port of the cylinder body through the three-way pipe 200 and the rapid pressure relief channel VT2.

[0034] In this embodiment of the application, the pressure relief channel VT2 is provided with a low pressure threshold. When the air pressure reaches the low pressure threshold, the pressure relief channel VT2 is closed.

[0035] Specifically, this invention is applied to an edge banding machine. When the edge banding machine's contouring process starts, the first solenoid valve VY1 is energized, connecting the air circuit to a high-pressure air source. The cylinder body 100 moves rapidly downwards under full pressure, entering a standby state to prepare for the arrival of the workpiece. This stage utilizes high pressure to achieve rapid response and improve production efficiency. When the workpiece enters the edge banding machine's conveyor belt and triggers the start-up induction switch, the edge banding machine system activates the encoder to calculate displacement. When the workpiece reaches the pre-set contouring position (i.e., the critical point before contacting the contouring component), a signal is sent to the PLC control unit. The PLC control unit determines that a pressure reduction operation is required and then controls the second solenoid valve YV2 to be energized. The second solenoid valve YV... 2. Upon power-on, the original high-pressure air supply path is closed, and the pressure relief channel VT2 is quickly opened, allowing the high-pressure gas in the cylinder body 100 to be rapidly discharged. After the pressure relief is completed, the system maintains the low-pressure threshold set by the pressure relief channel VT2, keeping the cylinder in a low and stable pressure state. The key at this stage is to release the pressure in advance to avoid a violent impact caused by high pressure when the workpiece comes into contact with the contouring component. The workpiece continues to move forward on the conveyor belt of the edge banding machine, pushing the contouring mechanism component in a low-pressure state. The residual pressure retained in the cylinder body is used to smoothly push the workpiece out and make the workpiece fit tightly against the film, completing the contouring and trimming action. Since the pressure has been greatly reduced, it effectively prevents the workpiece from being damaged or deformed due to excessive impact.

[0036] Embodiment 2 of this application is based on the encoder positioning of the edge banding machine. Combined with the control of the first solenoid valve, the second solenoid valve and the pressure relief channel VT2, the high-pressure air supply is cut off and the pressure is quickly released before the workpiece arrives at the processing area. Only the low pressure required to maintain the operation is retained, so that the workpiece can complete the contouring and trimming under low impact force. This achieves the technical effects of predicting position, actively reducing pressure and low pressure driving the processing and forming, thereby solving the problems of easy workpiece damage and unstable contouring under high-speed operation, which is conducive to improving processing quality and equipment reliability.

[0037] In this embodiment, the automatic pressure reduction device further includes a proximity switch SP3. When the proximity switch SP3 detects that the cylinder body has pushed the workpiece to the position set by the proximity switch SP3, the PLC control unit determines that the contour trimming is complete. The PLC control unit then controls the air circuit to return to its initial state, the cylinder body returns, and the contouring mechanism of the edge banding machine re-enters the standby state waiting for the workpiece. Specifically, when the cylinder body pushes the workpiece to the position set by the proximity switch SP3, the PLC control unit determines that the contour trimming is complete, and then controls the air circuit to return to its initial state, the cylinder body returns, and the equipment re-enters the standby state waiting for the workpiece, preparing for the next cycle.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. A high-speed profiling automatic pressure reduction control method for an edge bander, characterized by, The method comprises the following steps: High pressure rapid drop stage: when the profiling process starts, the first electromagnetic valve VY1 is powered on, the gas circuit is connected to the high pressure gas source, and the cylinder body moves rapidly downward under the action of full pressure to enter the standby state, waiting for the workpiece to be sent from the sealing machine conveying belt; Position detection and pressure relief triggering stage: when the workpiece enters the conveying belt and triggers the starting inductive switch, the system starts the sealing machine encoder to calculate the displacement; when the workpiece runs to the pre-set profiling predetermined position, the system determines that the pressure relief operation is needed, and then controls the second electromagnetic valve YV2 to be powered on; Automatic pressure relief and pressure maintaining stage: after the second electromagnetic valve YV2 is powered on, the original high pressure gas supply gas circuit is closed, and the rapid pressure relief channel VT2 is opened at the same time, so that the high pressure gas in the cylinder is rapidly discharged; After the pressure relief is completed, the system maintains the low pressure threshold set by the pressure relief channel VT2, so that the cylinder body is maintained in a stable pressure state; Low pressure profiling trimming stage: the workpiece continues to advance under the conveying of the sealing machine conveying belt, pushes the profiling part in the low pressure state, uses the residual pressure in the cylinder body to smoothly push the workpiece out, and makes the workpiece tightly adhere to the film, to complete the profiling trimming action; Stroke completion and reset stage: when the cylinder body pushes the workpiece to move to the position set by the proximity switch SP3, the system determines that the profiling trimming is completed, and then controls the gas circuit to return to the initial state, the cylinder body returns, and the profiling process reenters the standby state of waiting for the workpiece, preparing for the next cycle.

2. A high-speed profiling automatic pressure reduction control system for an edge bander, characterized by: The device comprises a cylinder body, a PLC control unit, a pressure relief channel VT1, a pressure relief channel VT2, a three-way pipe, a first electromagnetic valve YV1 and a second electromagnetic valve YV2, the PLC control unit is respectively connected with the first electromagnetic valve YV1, the second electromagnetic valve YV2, the pressure relief channel VT1, the pressure relief channel VT2 and the positioning encoder signal of the sealing machine, the front end gas hole of the cylinder body is communicated with one end of the pressure relief channel VT1, the other end of the pressure relief channel VT1 is connected with the first electromagnetic valve YV1, the rear end gas hole of the cylinder body is communicated with the pressure relief channel VT2 through the three-way pipe, and the high pressure gas source is connected with the three-way pipe after passing through the first electromagnetic valve YV1 and the second electromagnetic valve YV2 once; When the first electromagnetic valve YV1 is powered on, the gas circuit is connected to the high pressure gas source, the gas pressure enters the cylinder from the rear end gas hole of the cylinder body after passing through the second electromagnetic valve YV2 and the three-way pipe in sequence, and the gas pressure at the front end of the cylinder is discharged from the front end gas hole of the cylinder body through the pressure relief channel VT1; When the workpiece runs to the pre-set profiling predetermined position in the sealing machine, a signal is sent to the PLC control unit to perform the pressure relief operation, and the second electromagnetic valve YV2 is controlled to be powered on; when the second electromagnetic valve YV2 is powered on, the original high pressure gas supply gas circuit is closed, and the rapid pressure relief channel VT2 is opened at the same time, so that the high pressure gas in the cylinder body is discharged from the rear end gas hole of the cylinder body through the three-way pipe and the rapid pressure relief channel VT2.

3. The high-speed profiling automatic pressure-reducing control system of an edge bander according to claim 2, characterized in that: The pressure relief channel VT2 is provided with a low pressure threshold, and the pressure relief channel VT2 is closed when the gas pressure value reaches the low pressure threshold.

4. The high-speed profiling automatic pressure-reducing control system of an edge bander according to claim 2, characterized in that: The automatic pressure reducing device further comprises a proximity switch SP3, when the proximity switch SP3 detects that the cylinder body pushes the workpiece to move to the position set by the proximity switch SP3, the PLC control unit judges that the profiling trimming is completed, the PLC control unit controls the gas circuit to return to the initial state, the cylinder body returns, and the edge banding machine profiling mechanism reenters the standby state of waiting for the workpiece.

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