Stone machining device facilitating stone taking and placing

Abstract

The stone machining device comprises a step frame, a three-axis carving machine is installed on the upper step face of the top end of the step frame, and two symmetrical L-shaped shaft frames are installed on the portion, on one side of the three-axis carving machine, of the lower step face of the step frame. Rotary plate containing bases are rotationally installed on the outer walls of the opposite sides of the two L-shaped shaft brackets correspondingly, and at least four annular rectangular notch grooves at equal intervals are formed in the outer walls of the rotary plate containing bases. The double-end split clamping plate assembly firmly fixes a stone plate, the chain wheel driving unit drives the rotary plate containing base to rotate, the carved stone plate is turned over to the belt plate conveying machine till the stone plate is conveyed out of a storage station, so that the purpose of continuous discharging is achieved, and workers only need to manually support the stone plate to turn over in the discharging process.

Description

Technical Field

[0001] The present invention relates to the technical field of stone processing, and specifically relates to a stone processing device facilitating the taking and placing of stones. Background Art

[0002] A stone engraving machine is a mechanical device specifically used for fine engraving, cutting, and decoration on the surface of hard stones. Its main function is to utilize numerical control technology to control the movement of the tool along the X, Y, and Z directions through a preset program, achieving precise engraving of complex patterns, characters, and decorative lines, thereby improving production efficiency and the quality of works. After the engraving is completed, the staff needs to safely remove the processed stone slab. Usually, they first confirm that the machine has stopped running, then gradually release the clamping device, and gently pick up and place it using professional tools to avoid damaging the work. After removal, finished product inspection is also required to ensure that the engraving effect meets the requirements, and necessary subsequent processing such as grinding, cleaning, and waxing is carried out to improve the appearance and durability; For example, a stone engraving device facilitating the taking and placing of stones disclosed in the authorized publication number CN109624572B includes a bottom mounting box. The upper end of the bottom mounting box is connected with a blanking plate. A lifting plate is placed in the lifting plate accommodating groove. Two lifting cylinders are fixedly installed at both ends inside the bottom mounting box. A stone storage device is placed on the upper end of the lifting plate. A stone stacking plate is arranged on the front side of the blanking plate. The lower end of the stone stacking plate is equipped with rollers. By setting the stone storage device, the stone can be well protected, and the situation of pattern wear and the stone being unstable and broken during stacking can also be prevented. However, the above technical solution is mainly applied in the stone loading stage before engraving during use, that is, the stone is pushed towards the engraving machine by the lifting cylinder, the stone storage device, and the horizontal cylinder. After the stone engraving is completed, manual blanking operation is still required by the staff. When the engraving machine completes the processing program, the engraving machine needs to wait for manual intervention for workpiece separation, handling, and cleaning, resulting in an increase in the idle running time of the equipment. From the time when the operator receives the task instruction to the completion of the preparation work such as wearing protective equipment and preparing tools, a significant start-up time delay is formed. For small and medium-sized engraving workshops, if the same operator needs to take care of multiple devices, this time sequence break will be further amplified: the movement paths of the operator among various workstations cross, leading to the accumulation of waiting time, and the equipment utilization rate will decline accordingly. Summary of the Invention

[0003] The object of the present invention is to provide a stone processing device convenient for taking and placing stones. The three-axis engraving machine sends the engraved stone plate to the rotary plate holder until the stone plate enters the rectangular notch groove of the rotary plate holder. Then, the double-end split clamping plate assembly firmly fixes the stone plate. The sprocket drive unit drives the rotary plate holder to rotate, so that the engraved stone plate is turned towards the belt feeding machine until the stone plate is sent out of the storage station, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A stone processing device convenient for taking and placing stones, including: A stepped frame, on the upper stepped surface at the top of the stepped frame, a three-axis engraving machine is installed, and on the lower stepped surface of the stepped frame on one side of the three-axis engraving machine, two symmetric L-shaped shaft frames are installed. On the outer walls of the opposite sides of the two L-shaped shaft frames, a rotary plate holder is rotatably installed. On the outer wall of the rotary plate holder, at least four annularly equally spaced rectangular notch grooves are provided. On the outer wall of one side of one of the L-shaped shaft frames, a sprocket drive unit for driving the rotary plate holder to rotate is installed. When the rectangular notch groove is parallel to the stepped surface of the stepped frame, it receives the stone plate engraved by the three-axis engraving machine; A double-end split clamping plate assembly, at least four double-end split clamping plate assemblies are installed in an annularly equally spaced array between two adjacent rotary plate holders, and clamp the stone plate entering the rectangular notch groove. On the top of the stepped frame on the side of the L-shaped shaft frame away from the three-axis engraving machine, a belt feeding machine is installed. On one side of the surface of the stepped frame, a PLC control panel electrically connected to the input ends of the three-axis engraving machine, the sprocket drive unit, the belt feeding machine, and the double-end split clamping plate assembly is installed.

[0005] Preferably, the rotary plate holder includes a rotating shaft rotatably installed at one end inside the L-shaped shaft frame, a support disk installed at one end of the rotating shaft close to the vertical central reference plane of the stepped frame, and a frustum bolted and fixed on the outer wall of one side of the support disk. The four rectangular notch grooves are arranged annularly and equally spaced on the outer wall of the frustum.

[0006] Preferably, both the support disk and the frustum are made of stainless steel components. The depth of the rectangular notch groove is 30 to 50 cm, and the width is 10 cm to 15 cm.

[0007] Preferably, the sprocket drive unit includes a motor frame installed on the outer wall of one side of one of the L-shaped shaft frames, a stepping motor installed on the outer wall of one side of the motor frame, and a chain wheel installed at the end of the drive shaft of the stepping motor for driving the rotating shaft to rotate.

[0008] Preferably, an angular displacement sensor is installed on the inner wall of one side of the motor frame. One end of the angular displacement sensor is connected to one end of the rotating shaft, and the output end of the angular displacement sensor is electrically connected to the input end of the PLC control panel.

[0009] Preferably, the belt plate feeder includes a roller frame fixed on the lower step surface at the top of the stepped frame, driven belt rollers rotatably installed on both sides inside the roller frame, a driving belt roller, and a conveyor belt sleeved between the driven belt roller and the driving belt roller. A synchronous wheel drive assembly for driving the driving belt roller to rotate is installed on one side of the bottom end of the roller frame. The conveyor belt is located below the axis of the rotating shaft.

[0010] Preferably, an inverted U-shaped belt support frame for supporting the top wall of the conveyor belt is installed at the top of the roller frame.

[0011] Preferably, guide frames are welded on the front and rear inner walls of the roller frame, and slope walls are provided on the outer walls of the two guide frames close to each other.

[0012] Preferably, the double-end split clamping plate assembly includes a long I-shaped plate fixed between two rotating shafts, opening parts provided at both ends of the long I-shaped plate, two sliders symmetrically and slidably installed at both ends of the surface of the long I-shaped plate, and clamping plates fixed on the opposite ends of the two sliders. One end of the clamping plate extends into the rectangular notch groove. A convex column is fixed on one side of the surface of the slider. A Y-shaped fork is also slidably installed at both ends of the surface of the long I-shaped plate. An inclined straight notch for the convex column to pass through is provided on one side of the surface of the Y-shaped fork. A bidirectional screw electric linear module for driving the two Y-shaped forks to move towards each other is installed on the back of the long I-shaped plate.

[0013] Preferably, a bent arm is integrally formed on one side of the bottom end of the Y-shaped fork, and one end of the bent arm is fixedly connected to one of the moving ends of the bidirectional screw electric linear module.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The stone processing device facilitating stone picking and placing is provided with structures such as an L-shaped shaft frame, a rotary plate holder, a rectangular notch groove, a double-end split clamping plate assembly, and a sprocket drive unit that cooperate with each other. The three-axis engraving machine sends the engraved stone plate to the rotary plate holder until the stone plate enters the rectangular notch groove of the rotary plate holder. Then, the double-end split clamping plate assembly firmly fixes the stone plate. The sprocket drive unit drives the rotary plate holder to rotate, causing the engraved stone plate to turn towards the belt plate feeder until the stone plate is sent out of the storage station, thereby achieving the purpose of continuous blanking. During the blanking process, the staff only needs to manually support the turning of the stone plate; among them, the engraved stone slab directly enters the rotary plate holder through mechanical transmission, eliminating the equipment downtime waiting time before traditional manual intervention. The double-end split clamping plate assembly automatically completes clamping and fixing through the control of the PLC control panel without manual adjustment of the fixture position. And when the sprocket drive unit performs the turning of the stone slab, the subsequent engraved stone slabs have already started to enter the notch groove on the other side, forming an uninterrupted material flow. The overlapping operation mode eliminates the process interval, keeps the engraving machine in an effective working state all the time, and can also immediately enter the processing operation of the next workpiece. By forming a coherent operation flow of engraving - fixing - turning - conveying, the utilization rate of the engraving equipment is maximized; Secondly, the positioning accuracy of the double-end split clamping plate assembly and the rectangular notch groove ensures the precise docking of the stone slab transmission path and the engraving machine discharge trajectory, avoiding secondary positioning adjustment in traditional manual handling, realizing three-dimensional coordination among the engraving station, the blanking station, and the storage area, and minimizing the material flow path; Finally, the rigid fixation of the double-end split clamping plate and the turning operation of the sprocket drive unit and the rotary plate holder eliminate the continuous load during manual handling. The staff only needs to assist in supporting during the turning of the stone slab, avoiding the risk of muscle strain caused by long-term lifting of heavy objects, thereby reducing the labor intensity of the staff and reducing the frequency of physical contact and operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front view structural schematic diagram of the present invention; Figure 2 is the three-dimensional structural schematic Figure 1 ; Figure 3 is the three-dimensional structural schematic Figure 2 ; Figure 4 is the three-dimensional structural schematic diagram of the belt plate feeder of the present invention; Figure 5 is the three-dimensional sectional structural schematic diagram of the belt plate feeder of the second embodiment of the present invention; Figure 6 is the three-dimensional structural schematic diagram of the sprocket drive unit of the second embodiment of the present invention; Figure 7Schematic three-dimensional structure of the double-ended split clamping plate assembly in Embodiment 3 of the present invention Figure 1 ; Figure 8 Schematic three-dimensional structure of the double-ended split clamping plate assembly in Embodiment 3 of the present invention Figure 2 ; Figure 9 For the present invention Figure 6 Enlarged schematic view of the structure at location A in the present invention

[0016] In the figure: 1, stepped frame; 2, three-axis engraving machine; 3, L-shaped shaft frame; 4, rotary plate holder; 401, rotating shaft; 402, support disc; 403, frustum; 404, rectangular notch groove; 5, sprocket drive unit; 501, motor frame; 502, stepper motor; 503, chain wheel; 6, belt plate feeder; 601, roller frame; 602, driven belt roller; 603, driving belt roller; 604, synchronous wheel drive assembly; 605, inverted U-shaped belt support; 606, guide frame; 607, conveyor belt; 7, double-ended split clamping plate assembly; 701, I-shaped long plate; 7011, opening; 702, Y-shaped fork; 7021, inclined straight notch; 7022, bent arm; 703, slider; 7031, convex column; 704, clamping plate; 705, bidirectional lead screw electric linear module; 8, PLC control panel. Detailed implementation method

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Embodiment 1 is given by Figures 1 to 4 The present invention includes a stepped frame 1. A three-axis engraving machine 2 is installed on the upper stepped surface at the top of the stepped frame 1, and two symmetric L-shaped shaft frames 3 are installed on the lower stepped surface of the stepped frame 1 on one side of the three-axis engraving machine 2. A rotary plate holder 4 is rotatably installed on the outer walls of the opposite sides of the two L-shaped shaft frames 3. At least four annularly equally spaced rectangular notch grooves 404 are provided on the outer wall of the rotary plate holder 4. A sprocket drive unit 5 for driving the rotary plate holder 4 to rotate is installed on the outer wall of one of the L-shaped shaft frames 3. The rectangular notch grooves 404 receive the stone plates engraved by the three-axis engraving machine 2 when parallel to the stepped surface of the stepped frame 1; The double-end split clamping plate assembly 7, at least four double-end split clamping plate assemblies 7 are installed in an annular and equally spaced array between two adjacent rotary plate holders 4, and clamp the stone plates entering the rectangular notch groove 404. On the top of the stepped frame 1 on the side of the L-shaped shaft frame 3 away from the three-axis engraving machine 2, a belt plate feeder 6 is installed. On one side of the surface of the stepped frame 1, a PLC control panel 8 electrically connected to the input ends of the three-axis engraving machine 2, the sprocket drive unit 5, the belt plate feeder 6, and the double-end split clamping plate assembly 7 is installed.

[0019] Embodiment 2, on the basis of Embodiment 1, is given by Figure 5 and Figure 6 The rotary plate holder 4 includes a rotating shaft 401 rotatably installed at one end inside the L-shaped shaft frame 3, a support disk 402 installed at one end of the rotating shaft 401 close to the vertical central reference plane of the stepped frame 1, and a round table 403 bolted and fixed on the outer wall of one side of the support disk 402. Four rectangular notch grooves 404 are arranged in an annular and equally spaced manner on the outer wall of the round table 403. The support disk 402 and the round table 403 are both made of stainless steel components. The depth of the rectangular notch groove 404 is 30 to 50 cm, and the width is 10 cm to 15 cm. The workbench of the three-axis engraving machine 2 and the stone slab are translated along the X-axis direction until the end of the stone slab enters the rectangular notch groove 404 of the round table 403 until the stone slab is inserted to the bottom. Then, the double-end split clamping plate assembly 7 fixes the end of the stone slab on both sides. The design of the rectangular notch groove 404 enables the stone slab to be accurately embedded therein, avoiding sliding and offset during subsequent blanking operations; The sprocket drive unit 5 includes a motor frame 501 installed on the outer wall of one side of one of the L-shaped shaft frames 3, a stepping motor 502 installed on the outer wall of one side of the motor frame 501, and a chain wheel 503 installed at the end of the drive shaft of the stepping motor 502 for driving the rotating shaft 401 to rotate. An angular displacement sensor is installed on the inner wall of one side of the motor frame 501. One end of the angular displacement sensor is connected to one end of the rotating shaft 401, and the output end of the angular displacement sensor is electrically connected to the input end of the PLC control panel 8. The rotation angle of the rotating shaft 401 is detected by the angular displacement sensor; After the stone plate is fixed by the double-end split clamping plate assembly 7 in the rectangular notch groove 404, the stepping motor 502 is started to work through the PLC control panel 8. Then, the stepping motor 502 drives the rotating shaft 401, the support disk 402, and the round table 403 to rotate through the chain wheel 503, so that the stone plate in the rectangular notch groove 404 is flipped towards the conveying surface of the belt plate feeder 6 until the edge position of the stone plate contacts the conveying surface of the belt plate feeder 6. Through the sprocket drive of the sprocket drive unit 5, the stone slab can be quickly and accurately rotated to the predetermined position, providing a stable basis for subsequent blanking or processing; The end of the belt plate conveyor 6 can be connected to a stacking robotic arm, a quality inspection station or a packaging area, embedding the blanking process into the overall production line. The belt plate conveyor 6 includes a roller frame 601 fixed on the lower step surface at the top of the stepped frame 1, driven belt rollers 602 rotatably installed on both sides inside the roller frame 601, a driving belt roller 603, and a conveyor belt 607 sleeved between the driven belt roller 602 and the driving belt roller 603. A synchronous wheel drive assembly 604 for driving the driving belt roller 603 to rotate is installed on one side of the bottom end of the roller frame 601. The conveyor belt 607 is located below the central axis of the rotating shaft 401. After the stone slab contacts the conveyor belt 607, the synchronous wheel drive assembly 604 drives the driving belt roller 603 to rotate, and then the conveyor belt 607 drives the stone slab to move horizontally and gradually away from the rotary plate holder 4, thereby realizing continuous and stable transportation of the stone slab; An inverted U-shaped belt support frame 605 for supporting the top wall of the conveyor belt 607 is installed at the top of the roller frame 601. Guide frames 606 are welded on the front and rear inner walls of the roller frame 601. Sloping walls are provided on the outer walls of the two guide frames 606 close to each other. After the stone slab contacts the conveyor belt 607, the inverted U-shaped belt support frame 605 supports the conveyor belt 607 and the stone slab, reducing microcracks in the carving details caused by transportation vibration and ensuring uniform movement of the heavy stone slab.

[0020] Embodiment 3, based on Embodiment 2, by Figure 7 、 Figure 8 and Figure 9Given that the double-end split clamping plate assembly 7 includes an I-shaped long plate 701 fixed between two rotating shafts 401, opening portions 7011 provided at both ends of the I-shaped long plate 701, two sliders 703 symmetrically and slidably mounted on both ends of the surface of the I-shaped long plate 701, and clamping plates 704 fixed on the opposite ends of the two sliders 703. One end of the clamping plate 704 extends into the rectangular notch groove 404. A convex column 7031 is fixed on one side of the surface of the slider 703. Two Y-shaped fork members 702 are also slidably mounted on both ends of the surface of the I-shaped long plate 701. An inclined straight notch 7021 for the convex column 7031 to pass through is provided on one side of the surface of the Y-shaped fork member 702. A two-way screw electric linear module 705 for driving the two Y-shaped fork members 702 to move towards each other is mounted on the back surface of the I-shaped long plate 701. When the stone plate is fed into the rectangular notch groove 404, the end of the stone plate is located between the two clamping plates 704 on the same side. The two Y-shaped fork members 702 are driven by the two-way screw electric linear module 705 to move away from each other. Since the convex column 7031 is located in the inclined straight notch 7021, the horizontal movement of the Y-shaped fork member 702 will be converted into the linear movement of the slider 703 and the clamping plate 704 in the Z-axis direction. At this time, the two clamping plates 704 at the same end of the I-shaped long plate 701 approach each other to complete double-sided clamping and fixing of the stone plate. Its double-end split design ensures uniform distribution of the clamping force, avoids unnecessary stress on the stone slab, thereby reducing the risk of breakage, and in the blanking operation, enables rapid clamping and release of the stone slab, greatly shortening the operation cycle; A bent arm 7022 is integrally formed on one side of the bottom end of the Y-shaped fork member 702. One end of the bent arm 7022 is fixedly connected to one of the moving ends of the two-way screw electric linear module 705. The end of the Y-shaped fork member 702 away from the slider 703 is wound around to the back surface of the I-shaped long plate 701 through the bent arm 7022 and connected to one of the moving ends of the two-way screw electric linear module 705. The purpose of driving the two Y-shaped fork members 702 to move towards each other is achieved through the two-way screw electric linear module 705, ensuring the clamping synchronization of the end of the stone slab.

[0021] When the embodiment of the present application is in use, first, the PLC control panel 8 is started, and a preset processing program is loaded into the three-axis engraving machine 2 and the engraving parameters are synchronized. After the three-axis engraving machine 2 completes the engraving operation, the workbench of the three-axis engraving machine 2 and the stone slab on the workbench are translated along the X-axis direction to push the stone slab to the front ends of the two rotary plate holders 4. The edge of the stone slab contacts the guiding inclined surface of the rectangular notch groove 404. Through the X-axis thrust of the three-axis engraving machine 2, the stone slab slides into the rectangular notch groove 404 until the end of the stone slab slides into the innermost part of the rectangular notch groove 404. When the end of the stone slab is docked with the rectangular notch groove 404 of the rotary plate holder 4, the staff starts the double-end split clamping plate assembly 7 to work through the PLC control panel 8. The double-end split clamping plate assembly 7 closes, firmly clamps the stone slab, and forms a two-way clamping force on the upper and lower surfaces of the stone slab. After clamping, the staff needs to confirm whether the fixation of the stone slab is reliable to ensure that there is no displacement during the subsequent flipping and conveying processes. After clamping, an instruction is sent through the PLC control panel 8 to start the sprocket drive unit 5 to drive the rotary plate holder 4 and the clamped stone slab to rotate clockwise, so that the stone slab is gradually flipped to the conveying position of the belt plate feeder 6. During the flipping stage, gently support the edge of the plate to prevent small displacements and stress changes caused by inertia, and when the center of gravity of the plate crosses the critical point, help the plate maintain balance. The operator checks the uniformity of the contact between the bottom surface of the plate and the belt plate feeder 6. If necessary, fine-tune the rotation angle through the PLC control panel 8 to ensure a smooth transition. After the plate contacts the conveying surface of the belt plate feeder 6, the double-end split clamping plate assembly 7 performs a release action, and then the belt plate feeder 6 sends out the engraved stone slab, conveying the stone slab from the device to the storage or loading area of the next process. The staff observes the conveying process to ensure that the stone slab passes through the belt plate feeder 6 smoothly, avoiding dropping or jamming. If any abnormality is found, the conveying is immediately stopped for inspection and adjustment. After the stone slab is successfully sent out, the staff checks the status of the device, confirms that the double-end split clamping plate assembly 7 has been loosened and the rotary plate holder 4 has returned to the standby position, and makes preparations for the engraving and sending of the next stone slab.

[0022] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stone processing device convenient for taking and placing stones, characterized in that Including: A stepped frame (1), on the upper stepped surface at the top of the stepped frame (1), a three-axis engraving machine (2) is installed, and on the lower stepped surface of the stepped frame (1) on one side of the three-axis engraving machine (2), two symmetrical L-shaped shaft frames (3) are installed. On the outer walls of the opposite sides of the two L-shaped shaft frames (3), rotary plate holders (4) are rotatably installed. On the outer wall of the rotary plate holder (4), at least four annularly equally spaced rectangular notch grooves (404) are provided. On the outer wall of one side of one of the L-shaped shaft frames (3), a sprocket drive unit (5) for driving the rotary plate holder (4) to rotate is installed. When the rectangular notch grooves (404) are parallel to the stepped surface of the stepped frame (1), they receive the stone plates engraved by the three-axis engraving machine (2). A double-end split clamping plate assembly (7), at least four of the double-end split clamping plate assemblies (7) are installed in an annularly equally spaced array between two adjacent rotary plate holders (4), and clamp the stone plates entering the rectangular notch grooves (404). On the top of the stepped frame (1) on the side of the L-shaped shaft frame (3) away from the three-axis engraving machine (2), a belt plate feeder (6) is installed. On one side of the surface of the stepped frame (1), a PLC control panel (8) electrically connected to the input ends of the three-axis engraving machine (2), the sprocket drive unit (5), the belt plate feeder (6), and the double-end split clamping plate assembly (7) is installed.

2. A stone processing device facilitating the picking and placing of stones according to claim 1, characterized in that: The rotary plate holder (4) includes a rotating shaft (401) rotatably installed at one end inside the L-shaped shaft frame (3), a support disk (402) installed at one end of the rotating shaft (401) close to the vertical central reference plane of the stepped frame (1), and a frustum (403) bolted and fixed on the outer wall of one side of the support disk (402). The four rectangular notch grooves (404) are annularly equally spaced on the outer wall of the frustum (403).

3. A stone processing device facilitating the taking and placing of stones according to claim 2, characterized in that: Both the support disk (402) and the frustum (403) are made of stainless steel components. The depth of the rectangular notch groove (404) is 30 to 50 cm, and the width is 10 cm to 15 cm.

4. A stone processing device facilitating the picking and placing of stones according to claim 2, characterized in that: The sprocket drive unit (5) includes a motor bracket (501) installed on the outer wall of one side of one of the L-shaped shaft frames (3), a stepping motor (502) installed on the outer wall of one side of the motor bracket (501), and a chain wheel (503) installed at the end of the drive shaft of the stepping motor (502) for driving the rotating shaft (401) to rotate.

5. The stone processing device convenient for taking and placing stones according to claim 4, wherein: An angular displacement sensor is installed on the inner wall of one side of the motor bracket (501). One end of the angular displacement sensor is connected to one end of the rotating shaft (401), and the output end of the angular displacement sensor is electrically connected to the input end of the PLC control panel (8).

6. A stone processing device for facilitating the picking and placing of stones according to claim 2, wherein: The belt plate feeder (6) includes a roller frame (601) fixed on the lower step surface at the top of the stepped frame (1), driven belt rollers (602) rotatably installed on both sides inside the roller frame (601), a driving belt roller (603), and a conveyor belt (607) sleeved between the driven belt roller (602) and the driving belt roller (603). One side of the bottom end of the roller frame (601) is provided with a synchronous wheel drive assembly (604) for driving the driving belt roller (603) to rotate. The conveyor belt (607) is located below the central axis of the rotating shaft (401).

7. A stone processing device for facilitating the taking and placing of stones according to claim 6, characterized in that: The top end of the roller frame (601) is provided with an inverted U-shaped belt support frame (605) for supporting the top wall of the conveyor belt (607).

8. The stone processing device convenient for taking and placing stones according to claim 6, wherein: Guide frames (606) are welded on the front and rear inner walls of the roller frame (601), and slope walls are provided on the outer walls of the two guide frames (606) close to each other.

9. The stone processing device for facilitating the taking and placing of stones according to claim 2, wherein: The double-end split clamping plate assembly (7) includes an I-shaped long plate (701) fixed between two rotating shafts (401), opening parts (7011) provided at both ends of the I-shaped long plate (701), two sliders (703) symmetrically and slidably installed on both ends of the surface of the I-shaped long plate (701), and clamping plates (704) fixed on the opposite ends of the two sliders (703). One end of the clamping plate (704) extends into the rectangular notch groove (404). A convex column (7031) is fixed on one side of the surface of the slider (703). Y-shaped byte forks (702) are also slidably installed at both ends of the surface of the I-shaped long plate (701). An oblique straight notch (7021) for the convex column (7031) to pass through is provided on one side of the surface of the Y-shaped byte fork (702). A bidirectional screw electric linear module (705) for driving the two Y-shaped byte forks (702) to move towards each other is installed on the back of the I-shaped long plate (701).

10. A stone processing device facilitating the taking and placing of stones according to claim 9, characterized in that: A bent arm (7022) is integrally formed on one side of the bottom end of the Y-shaped byte fork (702), and one end of the bent arm (7022) is fixedly connected to one of the moving ends of the bidirectional screw electric linear module (705).

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