Grinding machine equipment for removing burrs of glass fibers

Abstract

The invention belongs to the technical field of subtractive grinding machines, and particularly relates to grinding machine equipment for removing glass fiber burrs. The top of the material carrying assembly is fixedly connected with a material pressing assembly used for limiting, the two sides of the top of the material carrying assembly are movably connected with grinding assemblies used for removing glass fiber burrs, the two grinding assemblies move in the opposite directions, and in the rolling driving process of the material carrying assembly on a glass fiber pipe, the glass fiber pipe can be ground through the grinding assemblies. The material loading assembly can drive the two sets of grinding assemblies to rotate, the material loading assembly can further drive the two sets of grinding assemblies to move in the opposite directions, and the two sets of grinding assemblies move the inner wall and the outer wall of the glass fiber pipes along with the glass fiber pipes with different diameters in a self-adaptive mode. And burrs of the inner wall, the outer wall and different positions of the end opening of the glass fiber pipe can be removed at the same time, and the treatment effect of tubular glass is improved.

Description

[0001] This application is a divisional application of application filed on November 3, 2025, with application number 202511590607.4 and invention title "A Grinding Machine for Removing Glass Fiber Burrs in a Subtractive Manufacturing Equipment". Technical Field

[0002] This invention belongs to the field of subtractive grinding technology, and specifically relates to a grinding machine for removing burrs from glass fibers. Background Technology

[0003] In the production of fiberglass products, irregular defects such as burrs and flash are generated at the edges after cutting or stamping sheets and pipes. These burrs not only affect the appearance quality and dimensional accuracy of the product, but also release fiberglass dust, endangering the health of operators and reducing the assembly performance of subsequent processes. Traditional manual grinding methods are inefficient, inconsistent, and pose significant safety hazards. Therefore, using specialized grinding machines for automated removal has become an inevitable choice. Existing grinding machines typically use a conveyor mechanism for automatic feeding and utilize high-speed rotating grinding wheels or belts to precisely and efficiently grind the edges of the workpiece.

[0004] A search revealed that Chinese Patent Publication No. CN212192371U, authorized on December 22, 2020, discloses an external cylindrical grinding machine for glass fiber insulating tubes. The machine includes a worktable, a center, and a chuck. The center and chuck for clamping the tube are respectively positioned at opposite ends of the worktable. The center and chuck are mounted on the worktable via a positioning seat. An adjustable pad that can slide laterally along the worktable is provided between the center and the chuck. A groove is provided on the worktable to facilitate the sliding of the adjustable pad. A through hole is laterally opened in the positioning seat for mounting the chuck, allowing the tube to pass through. Multiple pads slidably mounted on the worktable provide stable support for the bottom of the tube, ensuring the stability of the tube's bottom support during grinding. By opening a through hole coaxial with the center hole of the chuck on the positioning seat, the machine can grind excessively long tubes. The end of the tube can be inserted into the through hole and then clamped and fixed using the chuck, improving its applicability.

[0005] However, the equipment still has the following defects: although it can insert the end of the pipe into the through hole and then use the chuck to clamp and fix it, thus improving its applicability, it cannot match the inner and outer walls of the fiberglass pipe during the processing of the fiberglass pipe. This results in an unsatisfactory effect during the removal of burrs, which can easily lead to thinner pipe ends after processing, affecting the overall structural quality of the fiberglass pipe. Summary of the Invention

[0006] To address the aforementioned problems, the present invention provides a grinding machine for removing burrs from glass fibers, comprising a material carrier assembly; a pressure assembly for limiting the material carrier assembly is fixedly connected to the top of the material carrier assembly, and grinding assemblies for removing burrs from glass fibers are movably connected to both sides of the top of the material carrier assembly, with the two grinding assemblies moving in opposite directions; a glass fiber tube is rotatably connected to the top of the material carrier assembly, and the top of the glass fiber tube is movably fitted and connected to the pressure assembly.

[0007] Furthermore, the material loading assembly includes a support plate; the top of the support plate is provided with two sets of guide grooves, and the two sets of guide grooves are symmetrically arranged with the central axis of the support plate as the center. Electric push rods are slidably connected to the inner walls of the two sets of guide grooves near their ends, and the output ends of the electric push rods are drivenly connected to a linkage crossbar.

[0008] Furthermore, both sets of guide grooves are rotatably connected to screws, and the screws are threadedly connected to the side of the electric push rod away from the output end. A servo motor is provided on the outer wall of the bearing plate near the end of the guide groove, and the output end of the servo motor is connected to the end of the screw.

[0009] Furthermore, two sets of upright plates are fixedly connected to the top of the support plate, and the two sets of upright plates are symmetrically arranged with the central axis of the support plate as the center. Two sets of linkage rollers are rotatably connected between the two sets of upright plates. A first motor is fixedly connected to the outer wall of the two sets of upright plates, and the output end of the first motor is connected to the end of the linkage roller.

[0010] Furthermore, the pressing assembly includes a pressing base; the bottom of the pressing base is fixedly connected to the top of the bearing plate, and the top horizontal position of the pressing base is lower than the top horizontal position of the linkage roller. A pressing arm is rotatably connected to one end of the top of the pressing base, and a cylinder is embedded in the top of the pressing arm. The output end of the cylinder is drivenly connected to a pressing bracket, and a pressing roller is rotatably connected to the pressing bracket.

[0011] Furthermore, the grinding assembly includes a driving mechanism; a removal mechanism is driven to one side wall of the driving mechanism, the removal mechanism is sleeved on the inner wall of the glass fiber tube, and the outer wall of the glass fiber tube is attached to the driving mechanism; a storage box is fixedly connected to the top of the driving mechanism, and the storage box is in communication with the removal mechanism.

[0012] Furthermore, the driving mechanism includes a horizontal guide rail; a linkage bracket is fixedly connected to one side wall of the horizontal guide rail, a guide groove is provided on the side wall of the linkage bracket, and two sets of pins are slidably attached to the inner wall of the guide groove, with a second motor fixedly connected to one end of each set of pins.

[0013] Furthermore, the output ends of both sets of the second motors pass through the horizontal guide rail, and the output ends of the second motors are driven to be connected to the first grinding rod. Both sets of pins are threaded to lead screws. A third motor is embedded in the linkage bracket, and the output end of the third motor is driven to be connected to one end of the lead screw. The two ends of the horizontal guide rail are fixedly connected to the ends of the linkage crossbar.

[0014] Furthermore, the removal mechanism includes a second grinding rod and a fourth motor; the interior of the second grinding rod is a hollow structure, and the outer wall of the second grinding rod is provided with several sets of suction holes. A grinding disc is sleeved on the outer wall of the second grinding rod, a positioning ring is fixedly connected to one end of the second grinding rod, and a compression spring is also sleeved on the outside of the second grinding rod, and the compression spring is movably connected between the grinding disc and the positioning ring.

[0015] Furthermore, the fourth motor is fixedly connected to one side wall of the horizontal guide rail, and the output end of the fourth motor passes through the horizontal guide rail. The output end of the fourth motor is connected to a linkage block. One end of the linkage block is fixedly connected to one end of the second grinding rod, and a number of linkage rods are fixedly connected to it. The end of the second grinding rod is rotatably connected to the outer wall of the linkage block with a bearing. A conveying pipe is provided on the top of the bearing, and the other end of the conveying pipe is connected to the storage box. A vacuum pump is provided on the conveying pipe.

[0016] The beneficial effects of this invention are: 1. During the rolling drive of the glass fiber tube by the material carrier component, the glass fiber tube rotates. The material carrier component can also drive two sets of grinding components to move in opposite directions. The two sets of grinding components adaptively follow the movement of the inner and outer walls of glass fiber tubes of different diameters. When the rotation direction of the two sets of grinding components is not consistent with the rotation direction of the glass fiber tube, burrs can be removed from the inner and outer walls of the glass fiber tube and different positions at the port at the same time. This effectively avoids the problem of thin ports of the processed glass fiber tubes and improves the processing quality of tubular glass.

[0017] 2. After the output end of the servo motor drives the screw to rotate, the electric push rod on the screw drives the horizontal guide rail to move synchronously, and the horizontal guide rails on both sides move up and down and move towards each other. During this process, the output end of the third motor drives the lead screw to rotate, so that the two sets of first grinding rods move towards each other, which is used to drive the two sets of first grinding rods to fit against the outer wall of glass fiber tubes of different diameters, thereby improving the compatibility of grinding.

[0018] 3. The second grinding rod extends synchronously to the top of the inner wall of the glass fiber tube. After the grinding disc moves to the end of the glass fiber tube, the compression spring buffers the grinding disc, so that the grinding disc and the end of the glass fiber tube are elastically connected. This state is to intelligently match the burr removal state for glass fiber tubes of different diameters before burr removal, which improves the efficiency of intelligent matching of glass fiber tube grinding dimensions.

[0019] 4. The first motor drives the linkage roller, the second motor drives the first grinding rod, and the fourth motor drives the second grinding rod. The two sets of first grinding rods remove burrs from the outer wall of the glass fiber tube, the second grinding rod removes burrs from the inner wall of the glass fiber tube, and the grinding disc removes burrs from the end of the glass fiber tube, thereby improving the grinding efficiency of burr removal.

[0020] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the glass fiber burr removal device according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the material loading assembly according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the material pressing assembly according to an embodiment of the present invention is shown; Figure 4 A schematic diagram showing the connection between the grinding assembly and the glass fiber tube according to an embodiment of the present invention is shown; Figure 5 A schematic diagram of the grinding assembly according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the drive mechanism according to an embodiment of the present invention is shown; Figure 7 A schematic diagram of the removal mechanism according to an embodiment of the present invention is shown.

[0023] In the diagram: 1. Material loading assembly; 11. Bearing plate; 12. Guide chute; 13. Electric push rod; 14. Linkage crossbar; 15. Vertical plate; 16. Linkage roller; 17. First motor; 2. Pressing assembly; 21. Pressing seat; 22. Pressing arm; 23. Cylinder; 24. Pressing bracket; 25. Pressing roller; 3. Grinding assembly; 31. Drive mechanism; 311. Horizontal guide rail; 312. Linkage bracket; 313. Guide groove; 3 14. Pin; 315. Second motor; 316. First grinding rod; 317. Lead screw; 318. Third motor; 32. Removal mechanism; 321. Second grinding rod; 322. Adsorption hole; 323. Grinding disc; 324. Positioning ring; 325. Compression spring; 326. Fourth motor; 327. Linkage block; 328. Linkage rod; 329. Bearing; 3210. Conveying pipe; 33. Storage box; 4. Fiberglass tube. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] This invention provides a grinding machine for removing burrs from glass fibers, including a material carrier assembly 1; exemplarily, such as... Figure 1 As shown.

[0026] The top of the material carrier 1 is fixedly connected to a pressing component 2 for limiting the position. Both sides of the top of the material carrier 1 are movably connected to grinding components 3 for removing burrs from glass fibers, and the two grinding components 3 move in opposite directions. The top of the material carrier 1 is rotatably connected to a glass fiber tube 4, and the top of the glass fiber tube 4 is movably fitted and connected to the pressing component 2.

[0027] Specifically, during the rolling drive of the glass fiber tube 4, the material carrier 1 causes the glass fiber tube 4 to rotate. The material carrier 1 can also drive the two grinding components 3 to move in opposite directions, so that the two grinding components 3 can adaptively follow the glass fiber tubes 4 of different diameters to move their inner and outer walls. When the rotation direction of the two grinding components 3 is not consistent with the rotation direction of the glass fiber tube 4, the burrs can be removed from the inner and outer walls of the glass fiber tube 4 and different positions at the port at the same time.

[0028] The material loading assembly 1 includes a support plate 11; for example, such as Figure 2 As shown.

[0029] The top of the support plate 11 has two sets of guide grooves 12, which are symmetrically arranged with the central axis of the support plate 11 as the center. Electric push rods 13 are slidably connected to the inner walls of the two sets of guide grooves 12 near their ends. A linkage crossbar 14 is driven to the output end of each electric push rod 13. A screw is rotatably connected to each set of guide grooves 12, and the screw is threaded to the side of the electric push rod 13 away from its output end. A servo motor is installed on the outer wall of the support plate 11 near the end of the guide groove 12, and its output end is driven to the end of the screw. Two sets of upright plates 15 are fixedly connected to the top of the support plate 11, and are symmetrically arranged with the central axis of the support plate 11 as the center. Two sets of linkage rollers 16 are rotatably connected between the two sets of upright plates 15. A first motor 17 is fixedly connected to the outer wall of the two sets of upright plates 15, and its output end is driven to the end of the linkage roller 16.

[0030] The pressing assembly 2 includes a pressing base 21; for example, such as Figure 3 As shown.

[0031] The bottom of the pressure seat 21 is fixedly connected to the top of the bearing plate 11, and the top horizontal position of the pressure seat 21 is lower than the top horizontal position of the linkage roller 16. One end of the top of the pressure seat 21 is rotatably connected to the pressure arm 22. The top of the pressure arm 22 is embedded with a cylinder 23. The output end of the cylinder 23 is drivenly connected to the pressure bracket 24, and the pressure roller 25 is rotatably connected to the pressure bracket 24.

[0032] The grinding assembly 3 includes a drive mechanism 31; for example, such as Figure 4 and Figure 5 As shown.

[0033] A removal mechanism 32 is connected to one side wall of the drive mechanism 31. The removal mechanism 32 is sleeved on the inner wall of the glass fiber tube 4, and the outer wall of the glass fiber tube 4 is attached to the drive mechanism 31. A storage box 33 is fixedly connected to the top of the drive mechanism 31, and the storage box 33 is in communication with the removal mechanism 32.

[0034] The drive mechanism 31 includes a horizontal guide rail 311; for example, such as Figure 6 As shown.

[0035] A linkage bracket 312 is fixedly connected to one side wall of the horizontal guide rail 311. A guide groove 313 is provided on the side wall of the linkage bracket 312. Two sets of pins 314 are slidably attached to the inner wall of the guide groove 313. A second motor 315 is fixedly connected to one end of each set of pins 314. The output ends of the two sets of second motors 315 pass through the horizontal guide rail 311, and the output ends of the second motors 315 are driven to a first grinding rod 316. A lead screw 317 is threaded onto each set of pins 314. A third motor 318 is embedded in the linkage bracket 312, and the output end of the third motor 318 is driven to one end of the lead screw 317. The two ends of the horizontal guide rail 311 are fixedly connected to the ends of the linkage crossbar 14.

[0036] The removal mechanism 32 includes a second grinding rod 321 and a fourth motor 326; for example, as shown in the figure... Figure 7 As shown.

[0037] The second grinding rod 321 has a hollow interior and several sets of suction holes 322 are formed on its outer wall. A grinding disc 323 is sleeved on the outer wall of the second grinding rod 321. A positioning ring 324 is fixedly connected to one end of the second grinding rod 321. A compression spring 325 is also sleeved on the outside of the second grinding rod 321, and the compression spring 325 is movably connected between the grinding disc 323 and the positioning ring 324. The fourth motor 326 is fixedly connected to one side wall of the horizontal guide rail 311. The output end of the fourth motor 326 passes through the horizontal guide rail 311. The output end of the fourth motor 326 is connected to a linkage block 327. One end of the linkage block 327 is fixedly connected to one end of the second grinding rod 321, and several sets of linkage rods 328 are fixedly connected. The end of the second grinding rod 321 is rotatably connected to the outer wall of the linkage block 327 with a bearing 329. The top of the bearing 329 is provided with a conveying pipe 3210, and the other end of the conveying pipe 3210 is connected to the storage box 33. A vacuum pump is provided on the conveying pipe 3210.

[0038] Furthermore, a pressure sensor is embedded in the outer wall of the positioning ring 324 and is connected to the compression spring 325. The pressure sensor can detect the force of the grinding disc 323 squeezing the compression spring 325 in real time, so as to prevent the grinding discs 323 on both sides from causing excessive torque and damaging the port of the glass fiber tube 4 during the continuous opposite movement.

[0039] Specifically, the two sets of linkage rollers 16 are used to horizontally place the glass fiber tube 4, and the rotating pressing arm 22 is used to rotate and connect with the pressing seat 21, thereby driving the pressing roller 25 to approach the glass fiber tube 4. Then, the output end of the cylinder 23 is used to push the pressing bracket 24, so that the pressing roller 25 rolls and fits against the top of the glass fiber tube 4 during the falling process, thereby achieving the stability of the glass fiber tube 4 in the process of removing burrs. After the output end of the servo motor drives the screw to rotate, the electric push rod 13 on the screw drives the horizontal guide rail 311 to move synchronously, and the horizontal guide rails 311 on both sides move up and down and move towards each other. During this process, the output end of the third motor 318 drives the lead screw 317 to rotate, so that the two sets of first grinding rods 316 move towards each other, which is used to drive the two sets of first grinding rods 316 to fit against the outer wall of glass fiber tubes 4 of different diameters. During this process, the second grinding rod 321 extends synchronously to the top of the inner wall of the glass fiber tube 4, and after the grinding disc 323 moves to the port of the glass fiber tube 4, the compression spring 325 buffers the grinding disc 323, so that the grinding disc 323 and the port of the glass fiber tube 4 are elastically fitted and connected. This state is to intelligently match the burr removal state for glass fiber tubes 4 of different diameters before burr removal. The first motor 17 drives the linkage roller 16, the second motor 315 drives the first grinding rod 316, and the fourth motor 326 drives the second grinding rod 321, so that the two sets of first grinding rods 316 remove burrs from the outer wall of the glass fiber tube 4, the second grinding rod 321 removes burrs from the inner wall of the glass fiber tube 4, and the grinding disc 323 removes burrs from the end of the glass fiber tube 4.

[0040] The working principle of the glass fiber burr removal grinding machine proposed in this embodiment of the invention is as follows: The glass fiber tube 4 is placed horizontally between two sets of linkage rollers 16. The pressure roller 25 is driven to approach the glass fiber tube 4 by rotating the pressure arm 22 to rotate and connect it with the pressure seat 21. Then, the output end of the cylinder 23 pushes the pressure bracket 24 so that the pressure roller 25 rolls and fits against the top of the glass fiber tube 4 during the falling process, thereby achieving the stability of the glass fiber tube 4 in the process of removing burrs. After the output end of the servo motor drives the screw to rotate, the electric push rod 13 on the screw drives the horizontal guide rail 311 to move synchronously, and the horizontal guide rails 311 on both sides move up and down and move towards each other. During this process, the output end of the third motor 318 drives the lead screw 317 to rotate, so that the two sets of first grinding rods 316 move towards each other. This is used to drive the two sets of first grinding rods 316 to fit against the outer wall of glass fiber tubes 4 of different diameters. During this process, the second grinding rod 321 extends synchronously to the top of the inner wall of the glass fiber tube 4. After the grinding disc 323 moves to the port of the glass fiber tube 4, the compression spring 325 buffers the grinding disc 323, so that the grinding disc 323 and the port of the glass fiber tube 4 are elastically fitted and connected. This state is the intelligent matching of the burr removal state for glass fiber tubes 4 of different diameters before burr removal. The first motor 17 drives the linkage roller 16, the second motor 315 drives the first grinding rod 316, and the fourth motor 326 drives the second grinding rod 321. The two sets of first grinding rods 316 remove burrs from the outer wall of the glass fiber tube 4, the second grinding rod 321 removes burrs from the inner wall of the glass fiber tube 4, and the grinding disc 323 removes burrs from the end of the glass fiber tube 4.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A grinding machine for removing burrs from glass fibers, characterized in that: It includes a material carrier assembly; the top of the material carrier assembly is fixedly connected to a pressure assembly for limiting the position; both sides of the top of the material carrier assembly are movably connected to grinding assemblies for removing glass fiber burrs, and the two grinding assemblies move in opposite directions; the top of the material carrier assembly is rotatably connected to a glass fiber tube, and the top of the glass fiber tube is movably fitted and connected to the pressure assembly. The material loading assembly includes a support plate; the top of the support plate is provided with two sets of guide grooves, and the two sets of guide grooves are symmetrically arranged with the central axis of the support plate as the center. The inner walls of the two sets of guide grooves and near the ends are slidably connected to electric push rods, and the output ends of the electric push rods are all connected to linkage crossbars. Both sets of guide grooves are rotatably connected to screws, and a servo motor is provided on the outer wall of the bearing plate near the end of the guide groove. The output end of the servo motor is connected to the end of the screw. Two sets of vertical plates are fixedly connected to the top of the bearing plate, and two sets of linkage rollers are rotatably connected between the two sets of vertical plates. A first motor is fixedly connected to the outer wall of the two sets of vertical plates, and the output end of the first motor is connected to the end of the linkage roller. The pressing assembly includes a pressing base; the bottom of the pressing base is fixedly connected to the top of the bearing plate, and the top horizontal position of the pressing base is lower than the top horizontal position of the linkage roller. A pressing arm is rotatably connected to one end of the top of the pressing base, and a cylinder is embedded in the top of the pressing arm. The output end of the cylinder is drivenly connected to a pressing bracket, and a pressing roller is rotatably connected to the pressing bracket. The grinding assembly includes a drive mechanism; a removal mechanism is driven to one side wall of the drive mechanism, the removal mechanism is sleeved on the inner wall of the glass fiber tube, and the outer wall of the glass fiber tube is attached to the drive mechanism; a storage box is fixedly connected to the top of the drive mechanism, and the storage box is in communication with the removal mechanism. The fourth motor is fixedly connected to one side wall of the horizontal guide rail, and the output end of the fourth motor passes through the horizontal guide rail. The output end of the fourth motor is connected to a linkage block. One end of the linkage block is fixedly connected to one end of the second grinding rod, and a number of linkage rods are fixedly connected to it. The end of the second grinding rod is rotatably connected to the outer wall of the linkage block with a bearing. A conveying pipe is provided on the top of the bearing, and the other end of the conveying pipe is connected to the storage box. A vacuum pump is provided on the conveying pipe.

2. The grinding machine for removing glass fiber burrs according to claim 1, characterized in that: The driving mechanism includes a horizontal guide rail; a linkage bracket is fixedly connected to one side wall of the horizontal guide rail, a guide groove is opened on the side wall of the linkage bracket, and two sets of pins are slidably attached to the inner wall of the guide groove, and a second motor is fixedly connected to one end of each set of pins. The output ends of both sets of the second motors pass through the horizontal guide rail, and the output ends of the second motors are driven to be connected to the first grinding rod. Both sets of pins are threaded to lead screws. A third motor is embedded in the linkage bracket, and the output end of the third motor is driven to be connected to one end of the lead screw. The two ends of the horizontal guide rail are fixedly connected to the ends of the linkage crossbar.

3. The grinding machine for removing glass fiber burrs according to claim 1, characterized in that: The removal mechanism includes a second grinding rod and a fourth motor; the interior of the second grinding rod is hollow, and the outer wall of the second grinding rod is provided with several sets of suction holes. A grinding disc is sleeved on the outer wall of the second grinding rod, a positioning ring is fixedly connected to one end of the second grinding rod, and a compression spring is also sleeved on the outside of the second grinding rod, and the compression spring is movably connected between the grinding disc and the positioning ring.

4. The grinding machine for removing glass fiber burrs according to claim 1, characterized in that: The screw is threadedly connected to the electric push rod on the side away from the output end.

5. The grinding machine for removing glass fiber burrs according to claim 1, characterized in that: The two sets of vertical plates are arranged symmetrically with the central axis of the supporting plate as the center.

Images