Glass cutting device with switching function

Abstract

The invention relates to a glass cutting device with a switching function, and solves the technical problems that when an existing glass cutting device is used, glass cutters of different specifications need to be replaced or the whole set of cutting device needs to be directly replaced according to glass of different thicknesses, time and labor are wasted, and the working efficiency is affected. The glass cutting device comprises a bottom plate, a first air cylinder, a connecting sleeve, a lifting frame, a base plate, a second air cylinder support, a second air cylinder, a linear bearing seat, a linear bearing, an extension spring, a cutter shaft, a glass cutter, a spring connecting seat and a blocking pad, the linear bearing is connected with the linear bearing seat, the cutter shaft is connected with the linear bearing, the cutter shaft penetrates through the linear bearing, and the glass cutter is connected with the lower end of the cutter shaft. The tail end of a telescopic rod of the second air cylinder abuts against the upper end of the cutter shaft, the upper end of the extension spring is connected with the linear bearing seat, and the lower end of the extension spring is connected with the spring connecting seat. The method is widely applied to the technical field of glass processing.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic glass processing, and more particularly to a glass cutting device with a switching function. Background Art

[0002] The front windshield, rear windshield and side window glass used in automobiles are automatically processed from glass raw materials by a fully automatic multi-functional glass processing equipment. The working process of the fully automatic multi-functional glass processing equipment mainly includes processes such as cutting, edge breaking, edge grinding and drilling. The cutting process is carried out by a cutting device equipped with a roller glass cutter. The roller glass cutter presses on the edge of the glass, and the cutting device moves in the X-Y plane to let the roller glass cutter perform cutting operations on the edge of the glass.

[0003] However, in the use of conventional cutting devices, different specifications of roller glass cutters need to be replaced when cutting glass of different thicknesses; or a set of cutting devices is for glass of one thickness, and different cutting devices are replaced to adapt to glass of different thicknesses. The replacement work is time-consuming and laborious, quite cumbersome, and affects the operation efficiency. The structure of the cutting device in the prior art can refer to the invention patent application with the application publication number CN117700085A. Summary of the Invention

[0004] This application is to solve the technical problem that when the existing glass cutting device is used, for glass of different thicknesses, different specifications of glass cutters need to be replaced or the whole set of cutting devices need to be directly replaced, which is time-consuming and laborious and affects the operation efficiency, and provides a glass cutting device with a switching function that is easy to use and does not affect the operation efficiency.

[0005] The present disclosure provides a glass cutting device with a switching function, including a bottom plate, a first cylinder bracket, a first cylinder, a connecting sleeve, a lifting frame, a backing plate, a second cylinder bracket, a second cylinder, a linear bearing seat, a linear bearing, a tension spring, a cutter shaft, a glass cutter, a spring connecting seat and a blocking pad. The first cylinder bracket is fixedly connected to the bottom plate, the first cylinder is fixedly connected to the first cylinder bracket, the upper part of the lifting frame is fixedly connected to the telescopic rod of the first cylinder through the connecting sleeve, the backing plate is fixedly connected to the bottom plate, the second cylinder bracket is fixedly connected to the backing plate, the second cylinder is fixedly connected to the second cylinder bracket, the linear bearing seat is fixedly connected to the backing plate, the linear bearing is connected to the linear bearing seat, the cutter shaft is connected to the linear bearing, the cutter shaft passes through the linear bearing, the glass cutter is connected to the lower end of the cutter shaft, the end of the telescopic rod of the second cylinder abuts against the upper end of the cutter shaft, the upper end of the tension spring is connected to the linear bearing seat, the spring connecting seat is fixedly connected to the glass cutter by screws, and the lower end of the tension spring is connected to the screws;

[0006] The blocking pad is fixedly connected to the upper part of the cutter shaft. When the first cylinder acts to move the lifting frame downward, the lower part of the lifting frame can press down the blocking pad.

[0007] Preferably, the upper end of the tool shaft passes through the lower part of the lifting frame.

[0008] Preferably, the glass cutting device with a switching function further includes an induction sheet and a groove-type photoelectric sensor. The induction sheet is fixedly connected to the spring connecting seat, and the groove-type photoelectric sensor is fixedly connected to the linear bearing seat. In the initial state, the induction sheet is located in the groove of the groove-type photoelectric sensor.

[0009] Preferably, the glass cutting device with a switching function further includes a guide rod. The upper end of the guide rod is fixedly connected to the linear bearing seat, and the guide rod passes through the spring connecting seat. The spring connecting seat can slide along the guide rod.

[0010] Preferably, the glass cutting device with a switching function further includes a micro pressure sensor. The micro pressure sensor is fixedly connected to the upper end of the tool shaft, and the end of the telescopic rod of the second cylinder abuts against the micro pressure sensor.

[0011] Further preferably, the glass cutting device with a switching function further includes an electro-hydraulic proportional valve for adjusting the action stroke of the second cylinder.

[0012] Further preferably, the glass cutting device with a switching function further includes a controller, and the controller controls the electro-hydraulic proportional valve according to the signal fed back by the micro pressure sensor.

[0013] Preferably, the glass cutter is a roller-type glass cutter.

[0014] The beneficial effect of the present disclosure is that two cylinders are set as the power sources, and there is a roller-type glass cutter. According to glasses with different thicknesses or different shapes, one of the two cylinders can be selected for switching use. There is no need to spend time and effort removing the whole set of cutting devices to replace with new cutting devices to adapt to glasses with different thicknesses, and there is no need to spend time and effort replacing glass cutters of different specifications.

[0015] The groove-type photoelectric sensor and the induction sheet are provided. When abnormal situations such as no glass on the platform occur, the groove-type photoelectric sensor generates a signal and feeds it back to the controller. Then the controller controls the telescopic rod of the cylinder to retract, so that the tool shaft rises and the roller-type glass cutter retracts, avoiding damage to the blade of the roller-type glass cutter caused by the blade pressing on the platform.

[0016] A micro pressure sensor is provided, which can automatically and accurately adjust the cutting pressure to reach the required appropriate value. This can prevent the glass from being damaged or having chipped edges due to improper cutting pressure and is also beneficial to ensuring the cutting quality. In addition, by setting the micro pressure sensor, the cutting pressure can be adjusted according to glass of different thicknesses or shapes, so that the same roller glass cutter can be adapted to glass of different thicknesses or shapes. Adjusting the cutting pressure through the micro pressure sensor is particularly suitable for thin glass.

[0017] Further features and aspects of the present disclosure will be clearly described in the following description of the specific embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a glass cutting device with a switching function;

[0019] Figure 2 is Figure 1 a schematic diagram of the glass cutting device with a switching function shown installed on an XY linear module;

[0020] Figure 3 is Figure 2 a sectional view taken along the E-E direction in

[0021] Figure 4 is Figure 2 a sectional view taken along the C-C direction in

[0022] Figure 5 is Figure 2 a sectional view taken along the A-A direction in

[0023] Figure 6 is Figure 5 a sectional view taken along the D-D direction in

[0024] Figure 7 is Figure 2 a side view of the structure shown;

[0025] Figure 8 is a schematic diagram of controlling the movement of the cylinder through the Model-Free Adaptive Control (MFAC) algorithm.

[0026] Symbol description in the figures:

[0027] 1. Base plate, 2. First cylinder bracket, 3. Connecting sleeve, 4. Lifting frame, 5. Cutter shaft, 6. Blocking pad, 7. Linear bearing seat, 8. Spring connecting seat, 9. Inductive sheet, 10. Second cylinder bracket, 11. Roller glass cutter, 12. Pad plate, 13. Guide rod, 15. Second cylinder, 15-1. Telescopic rod, 16. First cylinder, 17. Tensile spring, 18. Groove type photoelectric sensor, 19. Linear bearing, 20. Micro pressure sensor, 21. Screw, 22. Electro-hydraulic proportional valve. Detailed implementation mode

[0028] The following refers to the attached drawings and further elaborates on the application with specific embodiments.

[0029] The specific embodiments described below are only the preferred implementation modes of the present application, and the protection scope of the present application is not limited thereto. For those skilled in the art, based on or according to the principles, concepts, and spirits of the present application, some changes or variations can be made, and the technical solutions formed by these changes or variations should all be covered by the protection scope of the present application.

[0030] As Figures 1-7 shown, the glass cutting device with a switching function includes a base plate 1, a first cylinder bracket 2, a first cylinder 16, a connecting sleeve 3, a lifting frame 4, a pad plate 12, a second cylinder bracket 10, a second cylinder 15, a linear bearing seat 7, a linear bearing 19, a tensile spring 17, a screw 21, a cutter shaft 5, a micro pressure sensor 20, a roller glass cutter 11, a spring connecting seat 8, a blocking pad 6, a guide rod 13, an inductive sheet 9, a groove type photoelectric sensor 18, and an electro-hydraulic proportional valve 22. The first cylinder bracket 2 is fixedly connected to the base plate 1, the first cylinder 16 is fixedly installed on the first cylinder bracket 2, the upper part of the lifting frame 4 is fixedly connected to the telescopic rod of the first cylinder 16 through the connecting sleeve 3, the pad plate 12 is fixedly connected to the base plate 1, the second cylinder bracket 10 is fixedly connected to the pad plate 12, the second cylinder 15 is fixedly installed on the second cylinder bracket 10, the second cylinder 15 is located below the first cylinder 16, and the second cylinder 15 is provided with a telescopic rod 15-1; the linear bearing seat 7 is fixedly installed on the pad plate 12, the linear bearing 19 is installed in the linear bearing seat 7, the cutter shaft 5 is connected to the linear bearing 19, the cutter shaft 5 passes through the linear bearing 19, the roller glass cutter 11 is connected to the lower end of the cutter shaft 5, the micro pressure sensor 20 is fixedly connected to the upper end of the cutter shaft 5, the end of the telescopic rod 15-1 abuts against the micro pressure sensor 20, the upper end of the tensile spring 17 is connected to the linear bearing seat 7, the spring connecting seat 8 is fixedly connected to the body of the roller glass cutter 11 with the screw 21, and the lower end of the tensile spring 17 is connected to the screw 21.

[0031] The blocking pad 6 is fixedly connected to the upper part of the cutter shaft 5. The upper end of the cutter shaft 5 passes through the lower part of the lifting frame 4. When the first air cylinder 16 works to move the lifting frame 4 downward, the lower part of the lifting frame 4 can press down the blocking pad 6, and the blocking pad 6 drives the cutter shaft 5 to move downward under force.

[0032] The upper end of the guide rod 13 is fixedly connected to the linear bearing seat 7. The guide rod 13 passes through the spring connection seat 8, and the spring connection seat 8 can slide along the guide rod 13 in the vertical direction. The induction piece 9 is fixedly connected to the spring connection seat 8, and the groove type photoelectric sensor 18 is fixedly connected to the linear bearing seat 7. In the initial state, the induction piece 9 is located in the groove of the groove type photoelectric sensor 18. When the induction piece 9 moves downward by a certain distance, the induction piece 9 disengages from the groove of the groove type photoelectric sensor 18 (the induction piece 9 is not located in the groove of the groove type photoelectric sensor 18), and the groove type photoelectric sensor 18 generates a signal.

[0033] The electro-hydraulic proportional valve 22 is used to adjust the action stroke of the second air cylinder 15.

[0034] The working process of the above glass cutting device with a switching function is introduced as follows:

[0035] The glass cutting device with a switching function is installed on the XY linear module of the glass processing equipment. There is a platform below the glass cutting device, and the glass to be cut is positioned on the platform.

[0036] According to the glass to be cut with different thicknesses, select the action of the first air cylinder 16 or the action of the second air cylinder 15 to realize the switching of different cutting pressures.

[0037] (1) The first case:

[0038] When the thickness of the glass to be cut is 2 mm, select the first air cylinder 16 to work. The telescopic rod of the first air cylinder 16 extends to drive the lifting frame 4 to move downward by a certain distance. The lower part of the lifting frame 4 presses down the blocking pad 6, and then the cutter shaft 5 moves downward. The cutter shaft 5 drives the roller glass cutter 11 to move downward by a certain distance under the guidance of the linear bearing 19 (realize the free and flexible up and down movement of the cutter shaft 5 without resistance), and then the blade of the roller glass cutter 11 contacts the glass surface. Then, the glass processing equipment moves the entire glass cutting device, and the blade of the roller glass cutter 11 cuts the glass while moving.

[0039] During the process of the cutter shaft 5 driving the roller glass cutter 11 and the spring connection seat 8 to move downward, the guide rod 13 plays a guiding role, improving the stability of the movement of the spring connection seat 8 and also improving the stability of the movement of the cutter shaft 5.

[0040] After the roller glass cutter 11 finishes moving and cutting the glass, the telescopic rod of the first cylinder 16 retracts, and the lower part of the lifting frame 4 no longer presses down on the blocking pad 6. Under the pulling force of the tension spring 17, the tool shaft 5 rises, and the roller glass cutter 11 moves away from the glass and retracts.

[0041] For safety, a groove-type photoelectric sensor 18 and an induction piece 9 are provided. In case there is no glass on the platform, and the tool shaft 5 moves downward by a distance exceeding the predetermined normal distance, the induction piece 9 will disengage from the groove-type photoelectric sensor 18 (the induction piece 9 is not located in the groove of the groove-type photoelectric sensor 18), and the groove-type photoelectric sensor 18 will generate a signal and feedback it to the controller. Then the controller controls the telescopic rod of the first cylinder 16 to retract, thereby causing the tool shaft 5 to rise and the roller glass cutter 11 to retract, preventing the blade of the roller glass cutter 11 from pressing on the platform and causing blade damage. Or in case of other abnormal situations that cause the tool shaft 5 to move downward by a distance exceeding the predetermined normal distance, the groove-type photoelectric sensor 18 and the induction piece 9 will play their roles.

[0042] (II) The second case:

[0043] When the thickness of the glass to be cut is relatively thin, for example, when the glass thickness is 1.1 mm, the second cylinder 15 is selected. The telescopic rod 15-1 of the second cylinder 15 extends, and the end of the telescopic rod 15-1 presses down on the micro pressure sensor 20, thereby causing the tool shaft 5 to move downward. The tool shaft 5 moves downward by a certain distance so that the blade of the roller glass cutter 11 contacts the glass surface. Then, the glass processing equipment moves the entire glass cutting device, and the blade of the roller glass cutter 11 performs moving cutting on the glass.

[0044] The micro pressure sensor 20 is provided to automatically and accurately adjust the pressure of the blade of the roller glass cutter 11 on the glass, that is, to automatically and accurately adjust the cutting pressure, so that the cutting pressure reaches the required appropriate value. The micro pressure sensor 20 feeds back the pressure data to the controller, and the controller controls the electro-hydraulic proportional valve 22 according to the pressure data. The electro-hydraulic proportional valve 22 adjusts the stroke of the second cylinder 15. The greater the stroke of the telescopic rod of the second cylinder 15 extends, the greater the cutting pressure, and the greater the pressure value fed back by the micro pressure sensor 20. The pressure value fed back by the micro pressure sensor 20 reflects the cutting pressure. Making the cutting pressure reach the required magnitude can prevent the glass from being damaged or chipped due to improper cutting pressure, and is also beneficial to ensuring the cutting quality. In addition, by setting the micro pressure sensor 20, it is possible to adjust the cutting pressure according to glasses of different thicknesses or different shapes, so that the same roller glass cutter can adapt to glasses of different thicknesses or different shapes.

[0045] After the roller glass cutter 11 finishes moving and cutting the glass, the telescopic rod 15-1 of the second cylinder 15 retracts, and the end of the telescopic rod 15-1 no longer presses down on the micro pressure sensor 20. Under the pulling force of the tension spring 17, the tool shaft 5 rises, and the roller glass cutter 11 moves away from the glass and retracts.

[0046] It can be seen that the glass cutting device with a switching function has a roller glass cutter, and two cylinders are provided, which are switched between to adapt to glass of different thicknesses. There is no need to time-consumingly and laboriously remove the entire cutting device to replace it with a new one to adapt to glass of different thicknesses, nor is it necessary to time-consumingly and laboriously replace glass cutters of different specifications. Or switch to adapt to glass of different shapes.

[0047] It should be noted that according to the actual situation, other types of glass cutters can be used to replace the roller glass cutter.

[0048] It should be noted that when selecting one of the first cylinder and the second cylinder to achieve the basic switching function, the micro pressure sensor 20 may not be provided.

[0049] Based on the micro pressure sensor 20 and the electro-hydraulic proportional valve 22, the stroke of the second cylinder 15 is controlled to make the cutting pressure reach the required magnitude. If the conventional PID algorithm is used for the control method, it is not suitable because of the defects of slow regulation speed and low accuracy. The dynamic characteristics of the electro-hydraulic proportional valve show significant non-linearity and time-variation. For example, the flow-pressure relationship of the proportional valve is affected by factors such as mechanical wear, gas temperature change, and pipeline damping fluctuation, with low accuracy; at the same time, disturbances such as the start-stop and leakage of the cylinder will further damage the steady-state accuracy of the control loop. The PID algorithm relies on parameter tuning under the assumption of linear time-invariant, and its fixed gain structure has inherent limitations when facing the above complex working conditions: the hysteresis of the integral link may lead to increased overshoot, the derivative link is sensitive to high-frequency noise and is prone to oscillation, and frequent manual parameter tuning not only increases the maintenance cost but also is difficult to ensure the robustness of the dynamic process. Therefore, the present invention adopts the model-free adaptive control (MFAC) algorithm to achieve a control method with fast regulation speed and higher accuracy.

[0050] Reference Figure 8 , F r is the given pressure value, and the non-linear system model is defined as:

[0051] F(k) = f(F(k - 1), u(k)) (1)

[0052] In formula (1), F(k) represents the force output at time k, that is, the pressure data fed back by the micro pressure sensor 20. u(k) represents the input electrical signal to the electro-hydraulic proportional valve at time k.

[0053] f(F(k - 1), u(k)) represents the mapping relationship between the output force and the input electrical signal of the electro - hydraulic proportional valve.

[0054] Using the Compact - Format Dynamic Linearization (CFDL) formula, the system can be approximated as a linear incremental model near the dynamic operating point:

[0055] ΔF(k + 1) = φ(k)Δu(k) (2)

[0056] In formula (2), ΔF(k + 1) = F(k) - F(k - 1), Δu(k) = u(k) - u(k - 1); φ(k) represents the Pseudo - Partial - Derivative (PPD) at time k, which is obtained by the projection method:

[0057]

[0058] In formula (3), η ∈ (0, 1) is the PPD learning rate, and μ > 0 is the anti - zero parameter.

[0059] The tracking error e(k) is:

[0060] e(k) = F r (k) - F(k) (4)

[0061] The controller of the Model - Free Adaptive Control (MFAC) algorithm is:

[0062]

[0063] In formula (5), ρ ∈ (0, 1) is the step - size factor, and λ > 0 is used to balance the stability of the control input.

[0064] MFAC in the electro - hydraulic proportional valve control can quickly suppress the deviation caused by load disturbance by dynamically compensating the lag effect of air - pressure change without the need to know the non - linear dead - zone of the spool or the gas - flow state equation in advance.

Claims

1. A glass cutting device with a switching function, characterized in that: It includes a base plate, a first cylinder bracket, a first cylinder, a connecting sleeve, a lifting frame, a pad, a second cylinder bracket, a second cylinder, a linear bearing seat, a linear bearing, a tension spring, a knife shaft, a glass cutter, a spring connecting seat and a blocking pad, the first cylinder bracket is fixedly connected to the base plate, the first cylinder is fixedly connected to the first cylinder bracket, the upper part of the lifting frame is fixedly connected to the telescopic rod of the first cylinder through the connecting sleeve, the pad is fixedly connected to the base plate, the second cylinder bracket is fixedly connected to the pad, the second cylinder is fixedly connected to the second cylinder bracket, the linear bearing seat is fixedly connected to the pad, the linear bearing is connected to the linear bearing seat, the knife shaft is connected to the linear bearing, the knife shaft passes through the linear bearing, the glass cutter is connected to the lower end of the knife shaft, the end of the telescopic rod of the second cylinder abuts against the upper end of the knife shaft, the upper end of the tension spring is connected to the linear bearing seat, the spring connecting seat is fixedly connected to the glass cutter by a screw, and the lower end of the tension spring is connected to the screw; The blocking pad is fixedly connected to the upper part of the knife shaft. When the first cylinder is actuated to move the lifting frame downward, the lower part of the lifting frame can press down the blocking pad.

2. The glass cutting device with switching function according to claim 1, characterized in that: The upper end of the knife shaft passes through the lower part of the lifting frame.

3. The glass cutting device with switching function according to claim 1 or 2, characterized in that: The glass cutting device with switching function also includes a sensing piece and a groove-type photoelectric sensor. The sensing piece is fixedly connected to the spring connecting seat, and the groove-type photoelectric sensor is fixedly connected to the linear bearing seat. In the initial state, the sensing piece is located in the groove of the groove-type photoelectric sensor.

4. The glass cutting device with switching function according to claim 1 or 2, characterized in that: The glass cutting device with switching function also includes a guide rod, the upper end of which is fixedly connected to the linear bearing seat, and the guide rod passes through the spring connecting seat, and the spring connecting seat can slide along the guide rod.

5. The glass cutting device with switching function according to claim 1 or 2, characterized in that: The glass cutting device with switching function also includes a micro pressure sensor, which is fixedly connected to the upper end of the knife shaft, and the end of the telescopic rod of the second cylinder abuts against the micro pressure sensor.

6. The glass cutting device with switching function according to claim 5, characterized in that: The glass cutting device with switching function further comprises an electrical proportional valve, and the electrical proportional valve is used to adjust the action stroke of the second cylinder.

7. The glass cutting device with switching function according to claim 6, characterized in that: The glass cutting device with switching function also includes a controller, and the controller controls the electric proportional valve according to the signal fed back by the micro pressure sensor.

8. The glass cutting device with switching function according to claim 1 or 2, characterized in that: The glass cutter is a roller glass cutter.

9. A glass processing equipment, characterized in that: A glass cutting device with a switching function comprising the glass cutting device according to any one of claims 1 to 8.

10. A cutting pressure model-free adaptive control method for a glass cutting device with a switching function as claimed in claim 7, characterized in that: The following steps are involved: F r is the given pressure value; Define a nonlinear system model: F(k)=f(F(k-1),u(k)) (1) In formula (1), F(k) represents the force output at time k, that is, the pressure data fed back by the micro pressure sensor; u(k) represents the input electrical signal to the electrical proportional valve at time k; f(F(k-1),u(k)) represents the mapping relationship between the output force and the input electrical signal of the electrical proportional valve; Define the linear incremental model: ΔF(k+1)=φ(k)Δu(k) (2) In formula (2), ΔF(k+1)=F(k)-F(k-1), Δu(k)=u(k)-u(k-1); φ(k) represents the pseudo partial derivative (PPD) at time k, which is obtained by the projection method: In formula (3), η∈(0,1) is the PPD learning rate, and μ>0 is the anti-zero parameter; The tracking error e(k) is: e(k)=F r (k)-F(k) (4) The controller of the model-free adaptive control algorithm is: In formula (5), ρ∈(0,1) is the step size factor, and λ>0 is used to balance the stability of the control input.

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