A fluent strip automatic lifting control system and method for a double-end edge banding machine

Abstract

The present invention relates to the technical field of double-end edge banding machines, and in particular to a control system and method for automatic lifting of a fluent strip of a double-end edge banding machine, wherein the control system includes a human-machine dialogue unit, a CPU control unit, a fluent strip lifting mechanism control unit, and a mobile end opening and closing mechanism control unit; the human-machine dialogue unit is connected to the CPU control unit; the fluent strip lifting mechanism control unit includes an upper sensing unit, a lower sensing unit, a retracted in-position sensing unit, an extended in-position sensing unit, a fluent strip lifting solenoid valve, a tail telescopic solenoid valve, an intermediate auxiliary top solenoid valve, and a latch solenoid valve. The present invention realizes precise automatic control of the lifting and lowering of the fluent strip and the opening and closing mechanism of the mobile end; the position status of the fluent strip and the mobile end is monitored in real time, and it can ensure that the various parts of the equipment can be accurately in place during the lifting and opening and closing process; the present invention solves the problem of automatic lifting of the fluent strip, saves manpower, and improves production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of double-end edge banding machines, in particular to a smooth strip automatic lifting control system and method of a double-end edge banding machine. Background Art

[0002] The automatic lifting device for the smooth strip of the double-end edge banding machine is a machine used by furniture factories to process panel furniture. The factory has requirements for the efficiency and quality of the processing. The main mechanisms include the control system, the smooth strip lifting mechanism, and the mobile end opening and closing mechanism. In the panel furniture industry, the traditional technical practice is: the double-end edge banding machine processes a large number of wide panels (relative to the feed direction). When the width of the panel is greater than a certain size, a smooth strip is required to support the middle, otherwise the middle of the panel will sag, causing the panel to deform, affecting the processing quality. When processing small-sized panels, the smooth strip has no effect, but because the smooth strip is more than 40mm thick and is between the fixed end and the moving end, the opening and closing mechanism of the moving end cannot be moved to the minimum position (such as the attached Figure 2 As shown), it can only process plates with a minimum size of 40mm or more. When small plates in this range need to be processed, the smooth strip needs to be manually disassembled and taken out; when wide plates are to be processed, manual installation is required, which is time-consuming and labor-intensive. Summary of the invention

[0003] In view of the problems of the prior art, the present invention provides a control system and method for automatically lifting and lowering a smooth strip of a double-end edge banding machine, which solves the problem of automatically lifting and lowering the smooth strip, saves manpower and improves production efficiency.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a control system for automatic lifting of a fluent strip of a double-end edge banding machine, wherein the double-end edge banding machine comprises a fluent strip lifting mechanism and a mobile end opening and closing mechanism, wherein the fluent strip lifting mechanism is used to control the lifting and lowering of the fluent strip, and the mobile end opening and closing mechanism is used to drive the mobile end of the double-end edge banding machine to approach or move away from the fixed end of the double-end edge banding machine; the control system comprises a human-machine dialogue unit, a CPU control unit, a fluent strip lifting mechanism control unit and a mobile end opening and closing mechanism control unit; the human-machine dialogue unit is connected to the CPU control unit;

[0006] The control unit of the fluent bar lifting mechanism includes an upper sensing unit, a lower sensing unit, a retracted sensing unit, an extended sensing unit, a fluent bar lifting solenoid valve, a tail telescopic solenoid valve, an intermediate auxiliary top solenoid valve and a latch solenoid valve, and the upper sensing unit, the lower sensing unit, the retracted sensing unit, the extended sensing unit, the fluent bar lifting solenoid valve, the tail telescopic solenoid valve, the intermediate auxiliary top solenoid valve and the latch solenoid valve are respectively connected to the CPU control unit by signal;

[0007] The mobile end opening and closing mechanism control unit comprises a mobile end opening and closing servo driver, and the mobile end opening and closing servo driver is signal-connected to the CPU control unit.

[0008] Wherein, the upper sensing unit includes a first upper sensing switch and a second upper sensing switch, and the first upper sensing switch and the second upper sensing switch are respectively located on the upper side of the front end and the upper side of the rear end of the flow strip.

[0009] Wherein, the lower sensing unit includes a first lower sensing switch and a second lower sensing switch, and the first lower sensing switch and the second lower sensing switch are respectively located at the lower side of the front end and the lower side of the rear end of the flow strip.

[0010] Wherein, the retracted position sensing unit includes a retracted position sensing switch, which is installed at the rear end of the fluent strip, and the retracted position sensing switch is used to detect whether the rear end tail of the fluent strip is in a folded state.

[0011] Wherein, the straightening-in-place sensing unit includes a straightening-in-place sensing switch, which is installed at the rear end of the fluent strip, and is used to detect whether the rear end tail of the fluent strip is in a straightened state.

[0012] Among them, the fluent bar lifting solenoid valve is a three-position five-way double-coil solenoid valve, and the fluent bar lifting solenoid valve includes a fluent bar lifting solenoid valve rising coil and a fluent bar lifting solenoid valve falling coil.

[0013] Among them, the tail telescopic solenoid valve is a three-position five-way double-coil solenoid valve, and the tail telescopic solenoid valve includes a tail telescopic solenoid valve retraction coil and a tail telescopic solenoid valve extension coil.

[0014] Wherein, the human-machine dialogue unit is connected with the CPU control unit via Ethernet communication.

[0015] The CPU control unit communicates with the mobile terminal to open and close the servo driver via CANopen.

[0016] The present invention also provides a method for automatically lifting and lowering a fluent strip of a double-end edge banding machine, which comprises the following steps: presetting a plate width threshold value f, and presetting a spacing threshold value M between a moving end and a fixed end of the double-end edge banding machine; when the width of the plate to be processed is greater than or equal to the plate width threshold value f, executing a fluent strip lifting action; when the width of the plate to be processed is less than the plate width threshold value f, executing a fluent strip lowering action;

[0017] The method for the fluent strip rising action is: the program button is started, the opening and closing servo driver of the moving end is started, the moving end mechanism of the double-end edge banding machine moves outward, and when the distance between the fixed end and the moving end reaches M or more, the rising coil of the fluent strip lifting solenoid valve is energized; if the distance between the fixed end and the moving end has reached or more when the program is started, then after the program is started, the rising coil of the fluent strip lifting solenoid valve is immediately energized, the middle auxiliary top solenoid valve is energized, the fluent strip lifting cylinder and the middle auxiliary top cylinder are extended, and the fluent strip mechanism of the double-end edge banding machine rises;

[0018] After the mechanism rises to the right position, it touches the first upper induction switch and the second upper induction switch, and the signal is transmitted to the CPU control unit, the latch solenoid valve is energized, the latch cylinder extends, and the support mechanism is locked to prevent the smooth bar lifting mechanism from accidentally falling;

[0019] Delay, the middle auxiliary push solenoid valve is powered off, the auxiliary push cylinder retreats, the retraction coil of the telescopic solenoid valve at the tail of the smooth bar is powered off, delay, the extension coil of the telescopic solenoid valve at the tail of the smooth bar is powered on, the straightening cylinder moves, the tail of the smooth bar goes from the folded state to the straightened state, touches the straightened in-position sensing switch, the in-position signal is transmitted to the CPU controller, and the action is completed;

[0020] The method for lowering the fluent bar is as follows: the program button is started, the straightening coil of the telescopic solenoid valve at the tail of the fluent bar is powered off, a delay is made, and the retraction coil of the telescopic solenoid valve at the tail of the fluent bar is energized, and the tail of the fluent bar enters a folded state from an extended state, and touches the retracted-in-place sensing switch; the latch solenoid valve is powered off, the latch cylinder retracts, a delay is made, the rising coil of the fluent bar lifting solenoid valve is powered off, a delay is made, the lowering coil of the fluent bar lifting solenoid valve is energized, the fluent bar lifting cylinder retracts, and the fluent bar descends; the fluent bar mechanism of the double-end edge banding machine descends into place, touches the first lower-position sensing switch and the second lower-position sensing switch, the lowering coil of the fluent bar lifting solenoid valve is powered off, the moving end opening and closing servo driver is started, the moving end part of the double-end edge banding machine moves inward, and stops when it moves into place.

[0021] Beneficial effects of the present invention:

[0022] The invention is cleverly designed. The automatic lifting control system of the fluent strip of the double-end edge banding machine realizes precise automatic control of the lifting of the fluent strip and the opening and closing mechanism of the mobile end through an integrated human-machine dialogue unit, a CPU control unit and control units of various actuators. This automatic control not only reduces the reliance on manual operation, but also significantly improves the efficiency of edge banding operations, so that the equipment can be quickly adjusted to the equipment according to plates of different sizes. The system of the invention monitors the position status of the fluent strip and the mobile end in real time through precise sensing devices such as an upper sensing unit, a lower sensing unit, a retracted sensing unit and an extended sensing unit, so as to ensure that the fluent strip and the mobile end are lifted and lowered. During the opening and closing process, all parts of the equipment can be accurately put in place, avoiding collision and damage caused by misoperation or equipment failure, thereby ensuring production safety; because the system can automatically adjust the height of the smooth bar and the opening and closing distance of the mobile end according to the plate size information input by the human-machine dialogue unit, the preset plate width threshold f and the preset spacing threshold M between the moving end and the fixed end of the double-end edge banding machine, it can flexibly adapt to plates of various sizes, which not only improves the utilization rate of the equipment, but also reduces the additional cost and time consumption caused by changing the plate; the present invention solves the problem of automatic lifting of the smooth bar, saves manpower and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the double-end edge banding machine of the present invention after the smooth strip is lowered into place.

[0024] Figure 2 This is a structural schematic diagram of a double-end edge banding machine in the prior art, in which the smooth strip is located between the fixed end and the movable end, and the opening and closing mechanism of the movable end cannot be moved to the minimum position.

[0025] Figure 3 It is a schematic structural diagram of the tail of the fluent strip of the present invention in a straightened state.

[0026] Figure 4 It is a schematic diagram of the structure of the tail of the fluent strip of the present invention in a folded state.

[0027] Figure 5 This is a principle block diagram of an automatic lifting control system for a smooth strip of a double-end edge banding machine according to Example 1 of the present application.

[0028] Figure 6 This is a principle block diagram of the smooth strip lifting mechanism control unit and the mobile end opening and closing mechanism control unit of Example 1 of the present application.

[0029] Figure 7 This is a flow chart of a method for automatically lifting and lowering a smooth strip of a double-end edge banding machine according to the second embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0031] Embodiment 1

[0032] In the first embodiment of the present application, Figures 1 to 6 As shown, a control system for automatic lifting of a fluent strip of a double-end edge banding machine is provided, wherein the double-end edge banding machine comprises a fixed end, a movable end, a fluent strip body, a fluent strip lifting mechanism and a movable end opening and closing mechanism, wherein the fluent strip lifting mechanism is used to control the lifting and lowering of the fluent strip, and the movable end opening and closing mechanism is used to drive the movable end of the double-end edge banding machine to approach or move away from the fixed end of the double-end edge banding machine; wherein the rear end of the fluent strip body is movably provided with a fluent strip tail and a cylinder for driving the fluent strip tail to rotate, and the cylinder is used to drive the fluent strip tail to rotate so that the fluent strip tail is folded and fitted with the fluent strip body or so that the fluent strip tail is straightened along the length direction of the fluent strip body; and its control system comprises A human-computer dialogue unit, a CPU control unit, a fluent bar lifting mechanism control unit, and a mobile end opening and closing mechanism control unit; the human-computer dialogue unit is connected to the CPU control unit; the fluent bar lifting mechanism control unit includes an upper sensing unit, a lower sensing unit, a retracted sensing unit, an extended sensing unit, a fluent bar lifting solenoid valve, a tail telescopic solenoid valve, an intermediate auxiliary top solenoid valve, and a latch solenoid valve, and the upper sensing unit, the lower sensing unit, the retracted sensing unit, the extended sensing unit, the fluent bar lifting solenoid valve, the tail telescopic solenoid valve, the intermediate auxiliary top solenoid valve, and the latch solenoid valve are respectively connected to the CPU control unit by signal;

[0033] The mobile end opening and closing mechanism control unit comprises a mobile end opening and closing servo driver, and the mobile end opening and closing servo driver is signal-connected to the CPU control unit.

[0034] Specifically, the embodiment of the present application is cleverly designed. The automatic lifting control system of the fluent strip of the double-end edge banding machine realizes precise automatic control of the lifting of the fluent strip and the opening and closing mechanism of the mobile end through an integrated human-computer dialogue unit, a CPU control unit and various actuator control units. This automatic control not only reduces the reliance on manual operation, but also significantly improves the efficiency of edge banding operations, allowing the equipment to be quickly adjusted to the equipment according to plates of different sizes. The system of the embodiment of the present application monitors the position status of the fluent strip and the mobile end in real time through precise sensing devices such as an upper sensing unit, a lower sensing unit, a retracted sensing unit and an extended sensing unit, and can determine the position status of the fluent strip and the mobile end in real time. It ensures that all parts of the equipment can be accurately in place during the lifting and opening and closing process, avoiding collision and damage caused by misoperation or equipment failure, thereby ensuring production safety; because the system can automatically adjust the height of the smooth bar and the opening and closing distance of the mobile end according to the plate size information input by the human-machine dialogue unit, the preset plate width threshold f and the preset double-end edge banding machine. It can flexibly adapt to plates of various sizes, which not only improves the utilization rate of the equipment, but also reduces the additional cost and time consumption caused by changing the plate; the embodiment of the present application solves the problem of automatic lifting of the smooth bar, saves manpower and improves production efficiency.

[0035] In the embodiment of the present application, the upper sensing unit includes a first upper sensing switch and a second upper sensing switch, and the first upper sensing switch and the second upper sensing switch are respectively located at the upper side of the front end and the upper side of the rear end of the fluent bar; wherein the lower sensing unit includes a first lower sensing switch and a second lower sensing switch, and the first lower sensing switch and the second lower sensing switch are respectively located at the lower side of the front end and the lower side of the rear end of the fluent bar. Specifically, by respectively setting the first upper sensing switch and the second upper sensing switch at the upper sides of the front and rear ends of the fluent bar, and respectively setting the first lower sensing switch and the second lower sensing switch at the lower side of the front end and the lower side of the rear end, the system can accurately sense the up and down lifting position of the fluent bar, and ensure its stability and accuracy during operation.

[0036] In the embodiment of the present application, the retracted-in-place sensing unit includes a retracted-in-place sensing switch, which is installed at the rear end of the fluent strip, and the retracted-in-place sensing switch is used to detect whether the rear end tail of the fluent strip is in a folded state. Wherein, the extended-in-place sensing unit includes an extended-in-place sensing switch, which is installed at the rear end of the fluent strip, and the extended-in-place sensing switch is used to detect whether the rear end tail of the fluent strip is in an extended state. Specifically, the provision of the retracted-in-place sensing switch and the extended-in-place sensing switch further ensures the accurate switching of the fluent strip tail between the folded and extended states, thereby improving the accuracy and efficiency of the edge sealing operation.

[0037] In the embodiment of the present application, the fluent bar lifting solenoid valve is a three-position five-way double-coil solenoid valve, and the fluent bar lifting solenoid valve includes a fluent bar lifting solenoid valve rising coil and a fluent bar lifting solenoid valve falling coil. Specifically, the fluent bar lifting solenoid valve and the tail telescopic solenoid valve both use a three-position five-way double-coil solenoid valve, which has the advantages of simple structure, reliable operation, and maintaining the output state before power failure after power failure; the embodiment of the present application can realize the lifting action of the fluent bar by controlling the power-on state of the rising coil and the falling coil.

[0038] In the embodiment of the present application, the tail telescopic solenoid valve is a three-position five-way double-coil solenoid valve, and the tail telescopic solenoid valve includes a tail telescopic solenoid valve retraction coil and a tail telescopic solenoid valve extension coil. Specifically, the embodiment of the present application can realize the tail telescopic action by controlling the power-on state of the retraction coil and the extension coil; this control method not only improves the response speed of the system, but also reduces energy consumption.

[0039] In an embodiment of the present application, the human-machine dialogue unit is connected to the CPU control unit via Ethernet communication. The CPU control unit communicates with the mobile-end opening and closing servo driver via CANopen communication; the human-machine dialogue unit includes an all-in-one industrial PC, and the CPU control unit includes an industrial switch DVS, a fixed-end programmable controller AS200, and a mobile-end programmable controller AS200. Specifically, the human-machine dialogue unit is connected to the CPU control unit via Ethernet communication, achieving high-speed and stable data transmission. This enables the operator to understand the operating status of the equipment in real time and make necessary adjustments and optimizations. The CPU control unit is connected to the mobile-end opening and closing servo driver via CANopen communication. This communication method has the advantages of strong anti-interference ability, long transmission distance, and high data transmission rate. It ensures that the mobile-end opening and closing mechanism can accurately and quickly respond to the instructions of the CPU control unit, thereby achieving efficient edge banding operations.

[0040] The working principle of the automatic lifting control system of the smooth strip of the double-end edge banding machine in the embodiment of the present application is as follows:

[0041] Human-machine dialogue and command input: The operator inputs the size information of the plate to be processed, the preset plate width threshold f, and the preset spacing threshold M between the moving end and the fixed end of the double-end edge banding machine through the human-machine dialogue unit; this information is transmitted to the CPU control unit for processing.

[0042] CPU control unit logical operation: The CPU control unit calculates whether the smooth bar needs to be raised or lowered and the distance the mobile end needs to open and close based on the received plate size information and the preset control logic and algorithm.

[0043] Actuator motion control:

[0044] Fluid bar lifting control: The CPU control unit sends a control signal to the fluid bar lifting solenoid valve to control the extension and contraction of the cylinder, thereby driving the fluid bar to move up and down. At the same time, the upper and lower sensing units monitor the position of the fluid bar in real time to ensure the accuracy and safety of the lifting action.

[0045] Tail extension control: According to the size of the plate and the distance between the fixed end and the moving end, the CPU control unit sends a control signal to the tail extension solenoid valve to control the rotation and swing of the cylinder, thereby driving the extension and retraction of the tail of the smooth strip. The extension in-position sensing unit and the retraction in-position sensing unit are used to monitor the state of the tail extension in real time.

[0046] Intermediate auxiliary top control: During the lifting process of the smooth bar, the CPU control unit sends a control signal to the intermediate auxiliary top solenoid valve to control the extension and retraction of the auxiliary top cylinder, providing additional supporting force for the smooth bar and ensuring the smoothness of the lifting process.

[0047] Latch locking control: After the smooth bar is raised or lowered into place, the CPU control unit sends a control signal to the latch solenoid valve to control the extension and retraction of the latch cylinder to achieve the locking and unlocking functions of the smooth bar.

[0048] Mobile end opening and closing control: The CPU control unit sends a control signal to the mobile end opening and closing servo driver to control the rotation of the servo motor, thereby driving the mobile end to move closer to or away from the fixed end. This control method has the characteristics of high precision and high speed, and can meet the processing requirements of plates of different sizes.

[0049] Real-time monitoring and feedback: During the entire control process, the system monitors the position status of the flow bar and the mobile terminal in real time through each sensing unit, and feeds this information back to the CPU control unit. The CPU control unit makes real-time adjustments and optimizes the control strategy based on the feedback information to ensure the stability and reliability of the system.

[0050] Embodiment 2

[0051] In the second embodiment of the present application, a method for automatically lifting and lowering the smooth strip of a double-end edge banding machine is provided, such as Figure 7 As shown, it includes the following steps: presetting a plate width threshold value f, presetting a spacing threshold value M between the moving end and the fixed end of the double-end edge banding machine; when the width of the plate to be processed is greater than or equal to the plate width threshold value f, executing a smooth bar ascending action; when the width of the plate to be processed is less than the plate width threshold value f, executing a smooth bar descending action;

[0052] The method for the fluent strip rising action is: the program button is started, the opening and closing servo driver of the moving end is started, the moving end mechanism of the double-end edge banding machine moves outward, and when the distance between the fixed end and the moving end reaches M or more, the rising coil of the fluent strip lifting solenoid valve is energized; if the distance between the fixed end and the moving end has reached or more when the program is started, then after the program is started, the rising coil of the fluent strip lifting solenoid valve is immediately energized, the middle auxiliary top solenoid valve is energized, the fluent strip lifting cylinder and the middle auxiliary top cylinder are extended, and the fluent strip mechanism of the double-end edge banding machine rises;

[0053] After the mechanism rises to the right position, it touches the first upper induction switch and the second upper induction switch, and the signal is transmitted to the CPU control unit, the latch solenoid valve is energized, the latch cylinder extends, and the support mechanism is locked to prevent the smooth bar lifting mechanism from accidentally falling;

[0054] Delay, the middle auxiliary push solenoid valve is powered off, the auxiliary push cylinder retreats, the retraction coil of the telescopic solenoid valve at the tail of the smooth bar is powered off, delay, the extension coil of the telescopic solenoid valve at the tail of the smooth bar is powered on, the straightening cylinder moves, the tail of the smooth bar goes from the folded state to the straightened state, touches the straightened in-position sensing switch, the in-position signal is transmitted to the CPU controller, and the action is completed;

[0055] The method for lowering the fluent bar is as follows: the program button is started, the straightening coil of the telescopic solenoid valve at the tail of the fluent bar is powered off, a delay is made, and the retraction coil of the telescopic solenoid valve at the tail of the fluent bar is energized, and the tail of the fluent bar enters a folded state from an extended state, and touches the retracted-in-place sensing switch; the latch solenoid valve is powered off, the latch cylinder retracts, a delay is made, the rising coil of the fluent bar lifting solenoid valve is powered off, a delay is made, the lowering coil of the fluent bar lifting solenoid valve is energized, the fluent bar lifting cylinder retracts, and the fluent bar descends; the fluent bar mechanism of the double-end edge banding machine descends into place, touches the first lower-position sensing switch and the second lower-position sensing switch, the lowering coil of the fluent bar lifting solenoid valve is powered off, the moving end opening and closing servo driver is started, the moving end part of the double-end edge banding machine moves inward, and stops when it moves into place.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A control system for automatically lifting and lowering a fluent strip of a double-end edge banding machine, the double-end edge banding machine comprising a fluent strip lifting mechanism and a mobile end opening and closing mechanism, the fluent strip lifting mechanism is used to control the fluent strip to rise and fall, the mobile end opening and closing mechanism is used to drive the mobile end of the double-end edge banding machine to approach or move away from the fixed end of the double-end edge banding machine; characterized in that: The control system includes a human-machine dialogue unit, a CPU control unit, a fluent strip lifting mechanism control unit and a mobile end opening and closing mechanism control unit; the human-machine dialogue unit is connected to the CPU control unit; The control unit of the fluent bar lifting mechanism includes an upper sensing unit, a lower sensing unit, a retracted sensing unit, an extended sensing unit, a fluent bar lifting solenoid valve, a tail telescopic solenoid valve, an intermediate auxiliary top solenoid valve and a latch solenoid valve, and the upper sensing unit, the lower sensing unit, the retracted sensing unit, the extended sensing unit, the fluent bar lifting solenoid valve, the tail telescopic solenoid valve, the intermediate auxiliary top solenoid valve and the latch solenoid valve are respectively connected to the CPU control unit by signal; The mobile end opening and closing mechanism control unit comprises a mobile end opening and closing servo driver, and the mobile end opening and closing servo driver is signal-connected to the CPU control unit.

2. The automatic lifting control system for the smooth strip of the double-end edge banding machine according to claim 1 is characterized in that: The upper sensing unit includes a first upper sensing switch and a second upper sensing switch, wherein the first upper sensing switch and the second upper sensing switch are respectively located at the upper side of the front end and the upper side of the rear end of the flow strip.

3. The automatic lifting control system for the smooth strip of the double-end edge banding machine according to claim 1 is characterized in that: The lower sensing unit includes a first lower sensing switch and a second lower sensing switch, and the first lower sensing switch and the second lower sensing switch are respectively located at the lower side of the front end and the lower side of the rear end of the flow strip.

4. The automatic lifting control system for the smooth strip of the double-end edge banding machine according to claim 1 is characterized in that: The retracted position sensing unit includes a retracted position sensing switch, which is installed at the rear end of the fluent strip and is used to detect whether the rear end tail of the fluent strip is in a folded state.

5. The automatic lifting control system for the smooth strip of the double-end edge banding machine according to claim 1 is characterized in that: The straightening-in-place sensing unit includes a straightening-in-place sensing switch, which is installed at the rear end of the smooth strip and is used to detect whether the rear end tail of the smooth strip is in a straightened state.

6. The automatic lifting control system for the smooth strip of the double-end edge banding machine according to claim 1 is characterized by: The fluent bar lifting solenoid valve is a three-position five-way double-coil solenoid valve, and the fluent bar lifting solenoid valve includes a fluent bar lifting solenoid valve rising coil and a fluent bar lifting solenoid valve falling coil.

7. The automatic lifting control system for the smooth strip of the double-end edge banding machine according to claim 1 is characterized in that: The tail telescopic solenoid valve is a three-position five-way double-coil solenoid valve, and the tail telescopic solenoid valve includes a tail telescopic solenoid valve retraction coil and a tail telescopic solenoid valve extension coil.

8. The automatic lifting control system for the smooth strip of the double-end edge banding machine according to claim 1 is characterized in that: The human-machine dialogue unit is connected to the CPU control unit via Ethernet communication.

9. The automatic lifting control system for the smooth strip of the double-end edge banding machine according to claim 1, characterized in that: The CPU control unit controls the mobile terminal opening and closing servo driver through CANopen communication.

10. A method for automatically lifting and lowering a smooth strip of a double-end edge banding machine, characterized in that: The following steps are involved: A plate width threshold f is preset, and a spacing threshold M between the moving end and the fixed end of the double-end edge banding machine is preset; when the width of the plate to be processed is greater than or equal to the plate width threshold f, the smooth bar is raised; when the width of the plate to be processed is less than the plate width threshold f, the smooth bar is lowered; The method for the fluent strip rising action is: the program button is started, the opening and closing servo driver of the moving end is started, the moving end mechanism of the double-end edge banding machine moves outward, and when the distance between the fixed end and the moving end reaches M or more, the rising coil of the fluent strip lifting solenoid valve is energized; if the distance between the fixed end and the moving end has reached or more when the program is started, then after the program is started, the rising coil of the fluent strip lifting solenoid valve is immediately energized, the middle auxiliary top solenoid valve is energized, the fluent strip lifting cylinder and the middle auxiliary top cylinder are extended, and the fluent strip mechanism of the double-end edge banding machine rises; After the mechanism rises to the right position, it touches the first upper induction switch and the second upper induction switch, and the signal is transmitted to the CPU control unit, the latch solenoid valve is energized, the latch cylinder extends, and the support mechanism is locked to prevent the smooth bar lifting mechanism from accidentally falling; Delay, the middle auxiliary push solenoid valve is powered off, the auxiliary push cylinder retreats, the retraction coil of the telescopic solenoid valve at the tail of the smooth bar is powered off, delay, the extension coil of the telescopic solenoid valve at the tail of the smooth bar is powered on, the straightening cylinder moves, the tail of the smooth bar goes from the folded state to the straightened state, touches the straightened in-position sensing switch, the in-position signal is transmitted to the CPU controller, and the action is completed; The method of the fluent bar lowering action is as follows: the program button is started, the extension coil of the telescopic solenoid valve at the tail of the fluent bar is powered off, a delay is made, the retraction coil of the telescopic solenoid valve at the tail of the fluent bar is powered on, the tail of the fluent bar enters the folded state from the straight state, and touches the retracted position sensing switch; The latch solenoid valve is powered off, the latch cylinder retreats, a delay is made, the rising coil of the smooth strip lifting solenoid valve is powered off, a delay is made, the descending coil of the smooth strip lifting solenoid valve is energized, the smooth strip lifting cylinder retreats, and the smooth strip descends; the smooth strip mechanism of the double-end edge banding machine descends into place, touches the first lower position sensing switch and the second lower position sensing switch, the descending coil of the smooth strip lifting solenoid valve is powered off, the moving end opening and closing servo driver is started, the moving end part of the double-end edge banding machine moves inward, and stops when it moves into place.

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