Stone slab edge polishing device

Abstract

The utility model relates to stone slab processing machinery technical field especially a kind of stone slab edge polishing device, a kind of stone slab edge polishing device, including rack, the upper portion of rack is provided with abrasive belt by drive mechanism, the abrasive belt is formed with movement path by the traction of drive mechanism in polishing process, the upper portion of the movement path has relaxation area and polishing area, the upper portion of the rack is arranged towards relaxation area, so that the adjusting mechanism of abrasive belt tension can be changed, the upper portion of the rack is also arranged towards polishing area, to provide the support mechanism of plane support when polishing, the upper portion of the rack is provided with sensor arranged towards movement path, and the sensor is used to identify the tension of abrasive belt.

Description

Technical Field

[0001] This utility model relates to the field of stone slab processing machinery technology, and in particular to a stone slab edge grinding device. Background Technology

[0002] During the edge grinding of stone slabs, the tension of the grinding belt is a key factor affecting grinding accuracy, equipment stability, and belt lifespan. In existing technologies, belt tension adjustment is typically done manually, which is cumbersome and inefficient. Specifically, when belt tension adjustment is needed, the operator must first stop the equipment and then, using external measuring tools such as an acoustic or infrared belt tension meter, manually press the belt to induce vibration and displacement. The operator then judges whether the tension is appropriate based on the measurement results displayed on the tension meter. If the tension is insufficient, the operator must manually adjust the position of the tensioning wheel to change the belt tension.

[0003] This manual adjustment method has obvious drawbacks: First, the adjustment process requires machine shutdown, which seriously affects production continuity and efficiency; second, manual operation relies on experience and is prone to human error, resulting in inaccurate tension control, which may lead to unstable grinding quality or premature wear of the grinding belt; in addition, the use of external measuring tools increases the complexity and cost of operation, and cannot achieve real-time monitoring and dynamic adjustment.

[0004] Therefore, there is an urgent need in the field for a stone slab edge grinding device that can monitor the tension of the grinding belt in real time and adjust it automatically to solve the problems of inconvenient adjustment, insufficient precision and low efficiency in the existing technology. Utility Model Content

[0005] To overcome the problems of cumbersome operation, low efficiency, and insufficient control precision in existing stone slab grinding devices, which require manual measurement and adjustment of the grinding belt tension by stopping the machine, this utility model provides a stone slab edge grinding device. By using sensors to monitor the amount of grinding belt slippage in real time and comparing it with a standard range, the device controls the adjustment mechanism to achieve adaptive adjustment of the tension, thereby achieving automatic and precise control without stopping the machine, improving the stability of grinding quality, and reducing reliance on manual operation.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a stone slab edge grinding device, including a frame, a grinding belt is set on the upper part of the frame through a driving mechanism, the grinding belt forms a movement path under the traction of the driving mechanism during the grinding process, the upper part of the movement path has a tension and relaxation area and a grinding area, the upper part of the frame is arranged with an adjustment mechanism facing the tension and relaxation area, thereby changing the tension of the grinding belt, the upper part of the frame is also arranged with a support mechanism facing the grinding area to provide planar support during grinding, and the upper part of the frame is provided with a sensor facing the movement path, the sensor is used to identify the tension of the grinding belt.

[0007] The aforementioned slate edge grinding device includes an adjustment mechanism comprising a swing arm that rotates around a frame, wherein an electric cylinder is installed between the swing arm and the frame to drive the swing arm to swing around the frame.

[0008] In the aforementioned stone slab edge grinding device, the free end of the swing arm is hinged to a roller that supports the grinding belt. The roller can be driven by the swing arm to support the grinding belt and move within the tension and relaxation area to change its tension.

[0009] The aforementioned slab edge grinding device includes a support mechanism comprising a frame plate arranged on one side of the machine frame, with support rollers for supporting the grinding belt arranged side by side and spaced apart on the upper part of the frame plate, and support plates for supporting the grinding belt arranged between the support rollers. The support plates are flush with the edges of the support rollers so that the grinding belt forms a flat grinding surface in the grinding area.

[0010] In the aforementioned slab edge grinding device, a connecting rod is arranged between the frame plate and the machine frame. The frame plate extends into the machine frame and can generate linear displacement to adapt to grinding belts of different circumferences.

[0011] In the aforementioned stone slab edge grinding device, the frame plate and the frame rod are rotatably connected. An arc-shaped groove is provided on the upper part of the frame plate, and a bolt connected to the frame plate can pass through the groove to fix the frame plate at an angle.

[0012] The aforementioned stone slab edge polishing device has a support plate extending from one side of the support rod toward the polishing area, which can support the stone slab, and the support plate is arranged at intervals with the polishing surface.

[0013] The aforementioned stone slab edge grinding device includes a driving mechanism comprising a motor arranged on the upper part of the frame, the motor being connected to the grinding belt via a pulley.

[0014] The aforementioned stone slab edge grinding device has marking points on the inner side of the grinding belt for sensor recognition. The sensor records the actual slippage of the grinding belt by recognizing the passing cycle of the marking points.

[0015] The aforementioned slab edge grinding device also includes a controller electrically connected to the sensor and the electric cylinder, wherein the controller dynamically adjusts the extension and retraction operation of the electric cylinder by receiving signals from the sensor.

[0016] The beneficial effects of this utility model are: 1. It realizes automatic detection and adjustment of grinding belt tension without the need for manual intervention to stop the machine, which significantly improves production efficiency.

[0017] 2. It can control the tension of the grinding belt in real time and accurately, effectively ensuring the stability of grinding quality.

[0018] 3. It eliminates the need for additional specialized tension measuring tools, simplifies equipment operation, and reduces usage and maintenance costs. Attached Figure Description

[0019] The present invention will be further described below with reference to the embodiments and examples.

[0020] Figure 1 This is a front view structural diagram of an embodiment.

[0021] Figure 2 This is a side view of the structure of an embodiment.

[0022] Figure 3 This is a top view of the structure of an embodiment.

[0023] Figure 4 This is a schematic diagram of the hardware connection process for the controller.

[0024] Figure 5 This is a schematic diagram of the signal conversion process of the sensor.

[0025] Figure 6 This is a schematic diagram of the controller's control process.

[0026] In the diagram: 1. Frame; 2. Drive mechanism; 21. Motor; 22. Pulley; 3. Grinding belt; 4. Adjustment mechanism; 41. Swing arm; 42. Electric cylinder; 43. Idler roller; 5. Support mechanism; 51. Frame rod; 52. Frame plate; 53. Support roller; 54. Support plate; 55. Groove; 56. Carrier plate; 6. Sensor. Detailed Implementation

[0027] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] One specific embodiment of the stone slab edge grinding device of this utility model is as follows: Figure 1-6 As shown, the device mainly includes a frame 1, a drive mechanism 2, a grinding belt 3, an adjustment mechanism 4, a support mechanism 5, a sensor 6, and a controller. The frame 1 serves as the support structure for the entire device. The drive mechanism 2 is located on the upper part of the frame 1 and includes a motor 21 and a pulley 22 driven by the motor 21. The grinding belt 3 is fitted onto the pulley 22 and forms a closed motion path under the traction of the drive mechanism 2. The upper part of the motion path is divided into a tension area and a grinding area.

[0029] The adjustment mechanism 4 is arranged on the upper part of the frame 1 and faces the tension-relaxation area. It is used to change the tension of the grinding belt 3. Specifically, the adjustment mechanism 4 includes a swing arm 41 that is hinged to the frame 1 via a rotating shaft. An electric cylinder 42 is installed between the swing arm 41 and the frame 1. The extension and retraction of the electric cylinder 42 can drive the swing arm 41 to swing around its hinge point. The free end of the swing arm 41 is hinged to a roller 43 that supports the grinding belt 3. When the electric cylinder 42 drives the swing arm 41 to swing, the roller 43 can support the grinding belt 3 to move up and down in the tension-relaxation area, thereby changing the overall tension of the grinding belt 3.

[0030] The support mechanism 5 is arranged on the upper part of the frame 1 and faces the grinding area. It is used to provide stable planar support for the grinding belt 3 during grinding. The support mechanism 5 includes a frame plate 52 connected to the frame 1 via a frame rod 51. The frame plate 52 can be linearly displaced along the frame rod 51 and is fixed by a locking member to accommodate grinding belts 3 of different circumferences. Multiple support rollers 53 supporting the grinding belt 3 are arranged side by side and spaced apart on the upper part of the frame plate 52. Support plates 54 supporting the grinding belt 3 are fixed between each support roller 53. The upper surface of the support plate 54 is level with the highest point of the outer edge of the support roller 53. Together, they form a flat support surface, allowing the grinding belt 3 to form a flat grinding surface in the grinding area, ensuring grinding quality. Furthermore, the support plate 52 and the support rod 51 are rotatably connected. The support plate 52 has an arc-shaped groove 55. The angle of the support plate 52 can be adjusted and fixed by bolts passing through the groove 55, thereby fine-tuning the angle of the grinding area. In addition, a carrier plate 56 extends from one side of the support rod 51 toward the grinding area to support the stone slab to be ground. A certain distance is maintained between the carrier plate 56 and the grinding surface of the grinding belt 3.

[0031] Sensor 6 is mounted on the upper part of the frame 1 and faces the movement path of the grinding belt 3. It is used to identify the tension of the grinding belt 3. In order to achieve non-contact detection, physical pits (i.e., identification points) are provided on the inner surface of the grinding belt 3 at equal intervals. Sensor 6 (such as proximity sensor 6 or photoelectric sensor 6) is used to detect the passage time of the physical pits.

[0032] The controller, as the core of the system, is electrically connected to the sensor 6, the electric cylinder 42, and the drive motor 21. In this embodiment, the controller uses a programmable logic controller (PLC) as the main control unit and is equipped with an incremental PID control algorithm. The sampling period is set to 100ms-500ms. Its control logic is as follows: After the sensor 6 detects the physical pit signal on the inner surface of the grinding belt 3, it transmits it to the controller. The controller first processes the signal: calculates the actual passing period of the marker point, and calculates the actual slippage between the grinding belt 3 and the pulley 22 by combining the known motor speed of the motor 21. The controller has a pre-stored standard slippage range value. By comparing the actual slippage with the standard range, the tension of the grinding belt 3 is determined: if the actual slippage is greater than the upper limit of the standard range, the grinding belt 3 is determined to be loose; if the actual slippage is less than the lower limit of the standard range, the grinding belt 3 is determined to be too tight; if the actual slippage is within the standard range, the tension is determined to be normal and no adjustment is made.

[0033] When adjustment is required, the controller activates the PID control algorithm. This algorithm uses the midpoint of the standard slip range as the setpoint and the actual slip as the feedback value for calculation. To prevent the system from frequently operating within the normal range, a dead zone control function is set up. That is, when the actual slip is within the standard range, the PID output is zero, and the electric cylinder 42 remains stationary. The calculated PID control quantity is mapped to the control signal of the electric cylinder 42. The electric cylinder 42 is preferably a servo electric cylinder 42 or a stepper electric cylinder 42. Depending on the selection, its control signal can be an analog signal (such as ±10V, corresponding to the contraction and extension of the electric cylinder 42) or a pulse direction signal. The controller sends this signal to the driver of the electric cylinder 42, driving the electric cylinder 42 to perform the corresponding extension and retraction actions. The tension or relaxation of the grinding belt 3 is adjusted through the swing arm 41 and the idler roller 43, forming a closed-loop control system.

[0034] The system's hardware connection scheme is as follows: the signal from sensor 6 is processed by the signal conditioning circuit and then connected to the analog or digital input module of the controller; the analog or pulse output module of the controller is connected to the driver of electric cylinder 42; the speed signal of drive motor 21 is also fed back to the controller. To ensure the safe and reliable operation of the system, a safety protection mechanism is also set. The controller program sets the stroke limit of electric cylinder 42 to prevent it from moving to the mechanical limit position. At the same time, the load of electric cylinder 42 is monitored in real time. When the load exceeds the set maximum value, an emergency stop operation is performed. When a fault is detected in sensor 6 or communication is interrupted, the system can switch to manual mode or maintain the current position of electric cylinder 42 and issue an alarm signal.

[0035] Regarding the tuning of control parameters, the PID parameters (proportional coefficient Kp, integral coefficient Ki, and derivative coefficient Kd) can be debugged and optimized on-site. The recommended initial value range is Kp=0.5-1.0, Ki=0.05-0.2, and Kd=0.02-0.1. During debugging, the P parameter can be tuned first for fast response, then the I parameter can be added to eliminate steady-state error, and finally the D parameter can be introduced to suppress overshoot. In addition, the system can be equipped with a human-machine interface (HMI) to display parameters such as actual slip, electric cylinder 42 position, and speed in real time, and supports online adjustment of PID parameters, manual / automatic mode switching, and alarm information query.

[0036] This specific implementation achieves automatic, real-time, and precise adjustment of the tension of the grinding belt through the aforementioned closed-loop control system, effectively overcoming the drawback of manual adjustment requiring machine shutdown in the prior art, and improving the automation level, production efficiency, and product quality stability of the grinding process.

Claims

1. A stone slab edge polishing device, characterized in that: The device includes a frame, on which a grinding belt is mounted via a drive mechanism. During grinding, the grinding belt is pulled by the drive mechanism to form a movement path. The upper part of the movement path has a tension / relaxation area and a grinding area. An adjustment mechanism is arranged on the upper part of the frame, facing the tension / relaxation area, thereby changing the tension of the grinding belt. A support mechanism is also arranged on the upper part of the frame, facing the grinding area, to provide planar support during grinding. A sensor is arranged on the upper part of the frame, facing the movement path, and the sensor is used to identify the tension of the grinding belt.

2. The stone slab edge grinding device according to claim 1, characterized in that: The adjustment mechanism includes a swing arm that rotates around the frame, and an electric cylinder is installed between the swing arm and the frame to drive the swing arm to swing around the frame.

3. The stone slab edge grinding device according to claim 2, characterized in that: The free end of the swing arm is hinged to a roller that supports the grinding belt. The roller can be driven by the swing arm to support the grinding belt and move within the tension and relaxation area to change its tension.

4. The stone slab edge grinding device according to claim 1, characterized in that: The support mechanism includes a frame plate arranged on one side of the frame, with support rollers for supporting the grinding belt arranged side by side and spaced apart on the upper part of the frame plate, and support plates for supporting the grinding belt arranged between the support rollers. The edges of the support plates and the support rollers are flush so that the grinding belt forms a flat grinding surface in the grinding area.

5. The stone slab edge grinding device according to claim 4, characterized in that: A connecting rod is arranged between the frame plate and the machine frame. The frame plate extends into the machine frame and can generate linear displacement to adapt to grinding belts of different circumferences.

6. The stone slab edge grinding device according to claim 5, characterized in that: The frame plate and the frame rod are rotatably connected. An arc-shaped groove is provided on the upper part of the frame plate. Bolts connected to the frame plate can pass through the groove to fix the frame plate at an angle.

7. The stone slab edge grinding device according to claim 5, characterized in that: One side of the support pole extends toward the polishing area with a carrier plate that can support the stone slab, and the carrier plate is arranged at intervals with the polishing surface.

8. The stone slab edge grinding device according to claim 1, characterized in that: The drive mechanism includes a motor arranged on the upper part of the frame, and the motor is connected to the grinding belt through a pulley.

9. The stone slab edge grinding device according to claim 2, characterized in that: The inner side of the grinding belt has physical pits for the sensor to identify. The sensor records the actual slippage of the grinding belt by identifying the cycle of the physical pits.

10. The stone slab edge grinding device according to claim 9, characterized in that: It also includes a controller that is electrically connected to the sensor and the electric cylinder, which dynamically adjusts the extension and retraction operation of the electric cylinder by receiving signals from the sensor.

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