Product grinding device for 3D printing

Abstract

The product polishing device for 3D printing comprises a fixing frame, a first shell and a second shell, the first shell and the second shell are matched in a clamped mode, an air duct pipe is arranged in the first shell, a metal hose is connected to the bottom of the air duct pipe in a clamped mode, a grip is fixedly connected to the middle of one side of the air duct pipe, and an inching button is arranged on one side of the top of the grip. A double-output-shaft motor is clamped in the middle of the first shell, fan blades and a chuck are fixedly connected to the two sides of the double-output-shaft motor correspondingly, a grinding head is clamped in the chuck, a connecting rod is fixedly connected to the top of the first shell, a transverse rod is fixedly connected to the connecting rod, and a first hydraulic cylinder is installed at the top of the fixing frame and penetrates through the fixing frame to be fixedly connected with the transverse rod. The end face polishing device can mechanically polish the end face of a product to be polished, and the situations that traditional manual polishing is low in efficiency and workers are prone to being injured are avoided. And corners and details of the to-be-polished product can be thoroughly polished, so that the polishing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a product polishing device for 3D printing. Background Art

[0002] 3D printing, a form of rapid prototyping technology, also known as additive manufacturing, uses a digital model file as its foundation and uses adhesive materials such as powdered metal or plastic to construct objects layer by layer. 3D printing is typically achieved using digital material printers. It is often used in mold manufacturing, industrial design, and other fields to create models, and is gradually being used in the direct manufacture of some products. Parts printed using this technology already exist. However, models produced by conventional 3D printers typically have a rough surface, requiring polishing.

[0003] However, when polishing models using existing 3D printing product polishing devices, many corners and details cannot be polished thoroughly due to the irregular shapes of 3D printed models. Sandpaper is usually needed to polish the details to ensure the polishing effect of the model. However, this polishing method is cumbersome and it is impossible to polish both the entire model and the details using one device, resulting in low polishing efficiency. In addition, 3D printed products can generally be polished by adjusting a handheld polishing device to a suitable angle. However, holding the polishing device in hand all the time increases the workload of the staff. Holding the polishing device in hand all the time can also make the staff too tired to hold the polishing device, which can easily cause injury or affect the polishing speed and accuracy. Utility Model Content

[0004] The utility model discloses a product polishing device for 3D printing, which is improved based on the existing structure and defects, and provides a product polishing device for 3D printing to achieve the purpose of better practical value.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A product polishing device for 3D printing comprises a fixed frame, a first shell and a second shell, the first shell and the second shell are snap-fitted together, an air trough tube is provided in the first shell, a metal hose is snap-fitted to the bottom of the air trough tube, a handle is fixedly connected to the middle part of one side of the air trough tube, and a movable button is provided on one side of the top of the handle, a double-output shaft motor is snap-fitted to the middle part of the first shell, a fan blade and a chuck are fixedly connected to the two sides of the double-output shaft motor, a grinding head is snap-fitted in the chuck, a connecting rod is fixedly connected to the top of the first shell, a cross bar is fixedly connected to the connecting rod, a first hydraulic cylinder is installed on the top of the fixed frame, the first hydraulic cylinder passes through the fixed frame and is fixedly connected to the cross bar, a grinding platform is fixedly welded to the bottom center of the fixed frame, a fixing assembly that moves up and down is provided on the side wall of the fixed frame near the grinding platform, the fixing assembly clamps the mounting rod, a grinding hydraulic cylinder is fixedly installed on one end of the mounting rod by a screw, a grinding motor is fixedly installed on the power output end of the grinding hydraulic cylinder, and a grinding wheel is fixedly installed on the power output end of the grinding motor.

[0007] In some embodiments, ventilation holes are provided on the tops of the first shell and the second shell, and the ventilation holes are connected to the air trough pipe and the metal hose.

[0008] In some embodiments, a slide groove is provided on the fixing frame where the fixing component is located, a threaded rod is provided in the slide groove, a driving motor is provided on one of the inner walls of the slide groove, the output end of the driving motor is connected to one end of the threaded rod, and the other end of the threaded rod is connected to the other inner wall of the slide groove through a bearing, a fixing block is threadedly connected to the threaded rod, the fixing block extends out of the slide groove, and one end of the fixing block is connected to the fixing component.

[0009] In some embodiments, the fixing assembly includes a first horizontal plate, a second horizontal plate, a first electric push rod, a pressure plate, a first rubber pad and a second rubber pad. The first horizontal plate and the second horizontal plate are arranged on the side of the fixing block away from the threaded rod. The second horizontal plate is located above the first horizontal plate. The first electric push rod is also vertically provided in the middle position of the upper surface of the second horizontal plate. The telescopic ends of the first electric push rod extend vertically downward from the lower surface of the second horizontal plate and are respectively screwed and fixed to the corresponding horizontally arranged pressure plates. The lower surface of the pressure plate is also horizontally fitted with a first rubber pad, and the upper surface of the first horizontal plate is horizontally fitted with a second rubber pad.

[0010] In some embodiments, the chuck is provided with mounting grooves around it, a clamping block is inserted into the mounting groove, a compression spring is fixedly connected between the clamping block and the side wall of the mounting groove, and a key groove is provided on one side of the chuck.

[0011] In some embodiments, a key is provided on the top of the grinding head and fits against the inner wall of the chuck, and a slot is provided around the shaft of the grinding head and is connected with the block.

[0012] In some embodiments, a bearing is rotatably installed at the bottom center of the fixed frame through a connecting rod, and the grinding platform is fixedly welded to the upper part of the outer ring of the bearing. The first plywood, the second plywood, the third plywood and the fourth plywood are respectively arranged around the grinding platform. The first plywood is fixedly arranged on the side of the grinding platform away from the grinding wheel, and the second plywood is slidably arranged on the other side of the grinding platform through a second electric push rod. The third plywood and the fourth plywood are fixedly arranged on the other two corresponding sides of the grinding platform, and the second electric push rod is connected to the bottom of the fixed frame.

[0013] The 3D printing product polishing device provided by the utility model has the following advantages:

[0014] By inserting the grinding head into the chuck, aligning the card key with the keyway during insertion and inserting it into the chuck, the stability is guaranteed because the end of the grinding head fits the inner wall of the chuck to avoid gaps that cause shaking during use. During the insertion process, the end of the grinding head pushes the block to overcome the elastic force of the compression spring to allow it to enter the installation slot. When the end of the grinding head is completely in the chuck, the block is not subjected to force and extends out of the installation slot to clamp the slot to prevent the grinding head from falling and affecting use. In the grinding process, the force point of the grinding head at the bottom will exert an upward force on the grinding head to further ensure stability. After the grinding head is clamped, the device is connected to the power supply, and the first shell is installed on the fixed frame by screws. The product to be ground is fixed, and the first hydraulic cylinder is started to move the grinding head to the appropriate position. Press the inching button to start the double-output shaft motor. The inching button will start the double-output shaft motor only while being pressed, and the power will be cut off when the button is released, avoiding slow reaction in the event of an accident and causing serious injury to ensure safety. After polishing is completed, the product to be polished can be turned over, and the above steps can be repeated. Then the second electric push rod can be started to make the second splint separate from the polishing platform, and the polishing hydraulic cylinder can be controlled to extend and retract. When the polishing wheel is about to contact the product to be polished, the polishing motor can be controlled to rotate to mechanically polish one side of the product. After completion, turn it over and polish the upper, lower, left and right end faces of the product to be polished. After the automatic polishing is completed, the first shell can be removed, and the handle can be held to adjust the device to a suitable angle to polish the remaining unpolished details on the printed product. When the double-output shaft motor rotates, it drives the bottom chuck and grinding head to rotate to polish the product.

[0015] At the same time, the rotation of the fan blades drives the air flow through the air guide plate into the air trough tube and the metal hose. The air flow is blown out from the end of the metal hose to disperse the waste chips generated by grinding, so as to prevent the waste chips from covering the product surface and affecting the line of sight and grinding accuracy. When in use, the metal hose can be bent to adjust the blowing angle according to different situations. When the grinding head needs to be replaced during the grinding process, the grinding head can be directly pulled out. The grinding head shaft squeezes the block into the installation slot and the grinding head is pulled out. Similarly, the new grinding head can be directly inserted into the chuck.

[0016] This device can mechanically polish the end face of the product to be polished first, avoiding the situation where manual polishing efficiency is slowed by holding the polishing device all the time. When the staff is too tired, they cannot hold the polishing device, which makes the staff easily injured or affects the speed and accuracy of polishing. It improves the applicability of the polishing equipment and increases the functionality of the polishing equipment. It can also achieve thorough polishing of the corners and details of the product to be polished. At the same time, polishing at independent angles avoids affecting the polishing feel and strength. The quick replacement of the grinding head reduces installation time. It also enables air blowing during the polishing process to prevent the waste generated by polishing from covering the product surface and blocking the view and affecting the polishing accuracy. It is more convenient to use and avoids manual cleaning, which greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the internal structure of a 3D printing product polishing device proposed in the utility model.

[0018] Figure 2 This is a schematic diagram of the partial structure of a 3D printing product polishing device proposed in the utility model.

[0019] Figure 3 for Figure 2 The diagram shows a partially exploded structure of a product polishing device for 3D printing.

[0020] Figure 4 for Figure 3 A partial cross-sectional schematic diagram of a product polishing device for 3D printing is shown.

[0021] Figure 5 for Figure 3 Schematic diagram of the partial three-dimensional structure of the chuck and grinding head shown.

[0022] Figure 6 for Figure 3 A partial cross-sectional schematic diagram of the chuck is shown.

[0023] Figure 7 for Figure 1 A partial enlarged view of point A is shown. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and marked in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work fall within the scope of protection of the present application.

[0025] Reference Figures 1 to 7 In a preferred embodiment, the 3D printing product polishing device includes a fixing frame 1, a first shell 2 and a second shell 3. The first shell 2 and the second shell 3 are snap-fitted. A wind trough tube 4 is provided in the first shell 2. A metal hose 5 is snap-fitted to the bottom of the wind trough tube 4. A handle 6 is fixedly connected to the middle of one side of the wind trough tube 4. A moving button 7 is provided on the top of the handle 6. A double-output shaft motor 8 is snap-fitted to the middle of the first shell 2. Fan blades 9 and a chuck 10 are fixedly connected to both sides of the double-output shaft motor 8. A grinding head 11 is snap-fitted to the chuck 10. The top of the first shell 2 can be connected by screws. There is a connecting rod 12, which is fixedly connected to a crossbar. A first hydraulic cylinder 13 is installed on the top of the fixed frame 1. The first hydraulic cylinder 13 passes through the fixed frame 1 and is fixedly connected to the crossbar. A grinding platform 14 is fixedly welded to the center of the bottom of the fixed frame 1. A fixing assembly that moves up and down is provided on the side wall of the fixed frame near the grinding platform 14. The fixing assembly clamps the mounting rod 16. A grinding hydraulic cylinder 17 is fixedly installed on one end of the mounting rod 16 via a screw. A grinding motor 18 is fixedly installed on the power output end of the grinding hydraulic cylinder 17, and a grinding wheel 19 is fixedly installed on the power output end of the grinding motor 18. An auxiliary handle 29 is fixedly connected to the front of the second housing 3.

[0026] like Figure 4As shown, in some embodiments, an air guide plate 28 is further provided on the first shell 2, and ventilation holes 20 are provided on the top of the first shell 2 and the second shell 3. The ventilation holes 20 are connected to the wind trough tube 4 and the metal hose 5. The fan blades 9 rotate and generate wind force under the drive of the double-shaft motor 8. The ventilation holes 20 ensure the smooth flow and replacement of air. The air guide plate 28 will guide a part of the air flow into the wind trough tube 4 and discharge it through the metal hose 5, thereby conveniently blowing away the waste generated by grinding during use, avoiding the waste covering the product surface and blocking the line of sight, affecting the grinding efficiency and grinding accuracy. The air guide plate 28 is located at the bottom of the fan blade 9, and a groove is provided at the connection between the air guide plate 28 and the first shell 2 to connect with the wind trough tube 4, ensuring that the air flow passing through the air guide plate 28 will enter the wind trough tube 4 to ensure the air output and play the role of blowing away the waste. In addition, the metal hose 5 can be manually bent for angle adjustment during use for easy use.

[0027] like Figure 5 As shown, in some embodiments, the chuck 10 is surrounded by mounting slots 22, into which a clamping block 23 is inserted. A compression spring 24 is fixedly connected to the clamping block 23 and the side wall of the mounting slot 22. A key slot 25 is provided on one side of the chuck 10. In some embodiments, a key 26 is provided on the top of the grinding head 11 and fits against the inner wall of the chuck 10. A clamping slot 27 is provided around the shaft of the grinding head 11 and engages with the clamping block 23.

[0028] Specifically, if Figures 2 to 6As shown, the fan blade 9 is located at the top shaft of the double-shaft motor 8, and the chuck 10 is located at the bottom shaft of the double-shaft motor 8. The chuck 10 passes through the bottom of the first shell 2 and is provided with a bearing to rotate therewith, so that the double-shaft motor 8 rotates and drives the fan blade 9 and the chuck 10 to rotate at the same time, thereby achieving the purpose of blowing away the waste chips generated during the grinding process. The bottom chuck 10 is rotatably connected to the first shell 2 through the bearing to ensure stability and extend the service life. The structure is simple and convenient to produce. The chuck 10 is provided with a mounting groove 22 around it, and a clamping block 23 is inserted into the mounting groove 22. The clamping block 23 and the side wall of the mounting groove 22 are fixedly connected with a compression spring 24. A key slot 25 is provided on one side of the chuck 10, so that when it is not under force, the elastic force of the compression spring 24 causes the clamping block 23 to extend into the inner hole of the chuck 10. When the shaft of the grinding head 11 is inserted, the clamping block 23 is squeezed to extend into the mounting groove 22, thereby ensuring feasibility and convenient and quick use. The cam 23 is pressed against the bottom edge of the chuck 10 to prevent the chuck 10 from sliding out of the chuck 10 and causing the chuck 10 to slide downwards, thereby preventing the chuck 10 from sliding out of the chuck 10 and causing the chuck 10 to slide downwards.

[0029] In some embodiments, a slide groove 31 is provided on the fixing frame 1 where the fixing component is located, a threaded rod 32 is provided in the slide groove 31, a driving motor 33 is provided on one of the inner walls of the slide groove 31, the output end of the driving motor 33 is connected to one end of the threaded rod 32, and the other end of the threaded rod 32 is connected to the other inner wall of the slide groove 31 through a bearing, a fixing block 34 is threadedly connected to the threaded rod 32, the fixing block 34 extends out of the slide groove 31, and one end of the fixing block 34 is connected to the fixing component. In some embodiments, the fixing assembly includes a first transverse plate 151, a second transverse plate 152, a first electric push rod 153, a pressure plate 154, a first rubber pad 155 and a second rubber pad 156. The first transverse plate 151 and the second transverse plate 152 are arranged on the side of the fixing block 34 away from the threaded rod 32. The second transverse plate 152 is located above the first transverse plate 151. A first electric push rod 153 is also vertically provided in the middle position of the upper surface of the second transverse plate 152. The telescopic ends of the first electric push rod 153 extend vertically downward from the lower surface of the second transverse plate 152 and are respectively screwed and fixed to the corresponding horizontally arranged pressure plate 154. The lower surface of the pressure plate 154 is also horizontally fitted with a first rubber pad 155, and the upper surface of the first transverse plate 151 is horizontally fitted with a second rubber pad 156. During grinding, the mounting rod 16 is placed on the second horizontal plate 152, and the first electric push rod 153 is activated to make the pressure plate 154 close to the mounting rod 16 to clamp the mounting rod 16. The grinding hydraulic cylinder 17 is activated to control the extension and contraction of the grinding hydraulic cylinder 17. When the grinding wheel 19 is about to contact the product to be grinded, the grinding motor 18 is controlled to rotate to grind the side of the product to be grinded. At the same time, the drive motor 33 can be activated to drive the threaded rod 32 to rotate, thereby driving the fixed block 34 to slide up and down on the threaded rod 32. The fixed block 34 drives the mounting rod 16 up and down, thereby driving the grinding wheel 19 up and down, which can fully grind the side of the product to be grinded. When the grinding wheel 19 needs to be replaced, the first electric push rod 153 can be activated to make the pressure plate 154 loosen the mounting rod 16, and then replace it.

[0030] like Figure 7As shown, in some embodiments, a bearing 51 is rotatably mounted at the bottom center of the fixed frame 1 via a connecting rod. A grinding platform 14 is fixedly welded to the upper portion of the outer ring of the bearing 51. A first clamping plate 41, a second clamping plate 42, a third clamping plate, and a fourth clamping plate are respectively disposed around the grinding platform 14. The first clamping plate 41 is fixedly disposed on a side of the grinding platform 14 away from the grinding wheel 19. The second clamping plate 42 is slidably disposed on the other side of the grinding platform 14 via a second electric push rod 43. The third and fourth clamping plates are fixedly disposed on the other two corresponding sides of the grinding platform 14. The second electric push rod 43 is connected to the bottom of the fixed frame 1. When the upper and lower end surfaces of the product to be polished need to be polished, the second electric push rod 43 is activated to align the first clamping plate 41 and the second clamping plate 42. The first clamping plate 41, the second clamping plate 42, the third clamping plate, and the fourth clamping plate clamp the product to be polished. When the side of the product to be polished needs to be polished, the second electric push rod 43 is started to separate the second clamping plate 42 from the polishing platform 14, and the third clamping plate and the fourth clamping plate clamp the product to be polished.

[0031] The beneficial effects of the utility model are:

[0032] By inserting the grinding head 11 into the chuck 10, aligning the card key 26 with the keyway 26 and inserting it into the chuck 10, because the end of the grinding head 11 fits the inner wall of the chuck 10, stability is guaranteed to avoid the presence of gaps that cause shaking during use. During the insertion process, the end of the grinding head 11 pushes open the card block 23 to overcome the elastic force of the compression spring 24 and allow it to enter the installation groove 22. When the end of the grinding head 11 completely enters the chuck 10, the card block 23 is not subject to force and extends out of the installation groove 22 to clamp the card slot 27 to limit it, thereby preventing the grinding head 11 from falling and affecting use. During the grinding process, the force point of the grinding head at the bottom will apply an upward force to the grinding head 11 to further ensure stability. After clamping the grinding head 11, the device is connected to the power supply, and the first shell 2 is installed on the fixing frame 1 by screws to fix the product to be ground. The first hydraulic cylinder 13 is started to move the grinding head 11 to the appropriate position, and the inching button 7 is pressed to start the dual-output shaft motor 8. The inching button 7 will only start the dual-output shaft motor 8 while being pressed. The power will be cut off when the button is released, avoiding slow reaction in the event of an accident and causing serious injuries, ensuring safety. After polishing is completed, the product to be polished can be turned over, and the above steps can be repeated. Then the second electric push rod 43 can be started to make the second clamping plate 42 separate from the polishing platform 14, and the polishing hydraulic cylinder 17 can be controlled to extend and retract. When the polishing wheel 19 is about to contact the product to be polished, the polishing motor 18 can be controlled to rotate to mechanically polish one side of the product. After completion, it can be turned over to polish the upper, lower, left and right end faces of the product to be polished. After the automatic polishing is completed, the first shell 2 can be removed, and the handle can be held to adjust the device to a suitable angle to polish the remaining unpolished details on the printed product. Press the inching button 7 to start the double-output shaft motor 8. When using it, you can also hold the auxiliary handle 29 for better force. When the double-output shaft motor 8 rotates, it drives the bottom chuck 10 and grinding head 11 to rotate to polish the product.

[0033] At the same time, the rotation of the fan blades 9 drives the air flow through the air guide plate 28 into the wind trough tube 4 and the metal hose 5. The air flow is blown out from the end of the metal hose 5 to blow away the waste chips generated by grinding, so as to prevent the waste chips from covering the product surface and affecting the line of sight and grinding accuracy. When in use, the metal hose 5 can be bent to adjust the blowing angle according to different situations. When the grinding head 11 needs to be replaced during the grinding process, the grinding head 11 can be directly pulled out, and the shaft of the grinding head 11 squeezes the block 23 into the installation slot 22 and the grinding head 11 is pulled out. Similarly, the new grinding head 11 can be directly inserted into the chuck 10.

[0034] This device can mechanically polish the end face of the product to be polished first, avoiding the situation where manual polishing efficiency is slowed by holding the polishing device all the time. When the staff is too tired, they cannot hold the polishing device, which makes the staff easily injured or affects the speed and accuracy of polishing. It improves the applicability of the polishing equipment and increases the functionality of the polishing equipment. It can also achieve thorough polishing of the corners and details of the product to be polished. At the same time, polishing at independent angles avoids affecting the polishing feel and strength. The quick replacement of the grinding head reduces installation time. It also enables air blowing during the polishing process to prevent the waste generated by polishing from covering the product surface and blocking the view and affecting the polishing accuracy. It is more convenient to use and avoids manual cleaning, which greatly improves work efficiency.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0036] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The replacements described may be partial structures, devices, or method steps, or they may be complete technical solutions. Any equivalent replacements or modifications based on the technical solution and the concept of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A product polishing device for 3D printing, characterized in that: The invention comprises a fixing frame (1), a first shell (2) and a second shell (3), wherein the first shell (2) and the second shell (3) are snap-fitted together, an air trough tube (4) is provided in the first shell (2), a metal hose (5) is snap-fitted to the bottom of the air trough tube (4), a handle (6) is fixedly connected to the middle of one side of the air trough tube (4), a jog button (7) is provided on the top side of the handle (6), a double-shaft motor (8) is snap-fitted to the middle of the first shell (2), a fan blade (9) and a chuck (10) are fixedly connected to both sides of the double-shaft motor (8), a grinding head (11) is snap-fitted to the inside of the chuck (10), and a connecting rod (12) can be connected to the top of the first shell (2) by screws. A cross bar is fixedly connected to the connecting rod (12); a first hydraulic cylinder (13) is installed on the top of the fixing frame (1); the first hydraulic cylinder (13) passes through the fixing frame (1) and is fixedly connected to the cross bar; a grinding platform (14) is fixedly welded to the center of the bottom of the fixing frame (1); a fixing component that moves up and down is provided on the side wall of the fixing frame close to the grinding platform (14); the fixing component clamps the mounting rod (16); a grinding hydraulic cylinder (17) is fixedly installed on one end of the mounting rod (16) by a screw; a grinding motor (18) is fixedly installed on the power output end of the grinding hydraulic cylinder (17); and a grinding wheel (19) is fixedly installed on the power output end of the grinding motor (18).

2. A 3D printing product polishing device according to claim 1, characterized in that: Ventilation holes (20) are provided on the tops of the first shell (2) and the second shell (3), and the ventilation holes (20) are connected to the air trough pipe (4) and the metal hose (5).

3. A 3D printing product polishing device according to claim 1, characterized in that: A slide groove (31) is provided on the fixing frame (1) where the fixing assembly is located. A threaded rod (32) is provided in the slide groove (31). A driving motor (33) is provided on one inner wall of the slide groove (31). The output end of the driving motor (33) is connected to one end of the threaded rod (32). The other end of the threaded rod (32) is connected to the other inner wall of the slide groove (31) through a bearing. A fixing block (34) is threadedly connected to the threaded rod (32). The fixing block (34) extends out of the slide groove (31). One end of the fixing block (34) is connected to the fixing assembly.

4. A 3D printing product polishing device according to claim 3, characterized in that: The fixing assembly comprises a first transverse plate (151), a second transverse plate (152), a first electric push rod (153), a pressure plate (154), a first rubber pad (155) and a second rubber pad (156). The first transverse plate (151) and the second transverse plate (152) are arranged on a side of the fixing block (34) away from the threaded rod (32). The second transverse plate (152) is located above the first transverse plate (151). The first electric push rod (153) is also vertically provided at the middle position of the upper surface of the second transverse plate (152). The telescopic ends of the first electric push rod (153) respectively extend vertically downward from the lower surface of the second transverse plate (152) and are respectively screwed and fixed to the corresponding pressure plates (154) arranged horizontally. The lower surface of the pressure plate (154) is also horizontally fitted with the first rubber pad (155). The upper surface of the first transverse plate (151) is horizontally fitted with the second rubber pad (156).

5. The 3D printing product polishing device according to claim 1, characterized in that: The chuck (10) is provided with a mounting groove (22) around its periphery, a clamping block (23) is inserted into the mounting groove (22), a compression spring (24) is fixedly connected between the clamping block (23) and the side wall of the mounting groove (22), and a key groove (25) is provided on one side of the chuck (10).

6. A 3D printing product polishing device according to claim 5, characterized in that: A key (26) is provided on the top of the grinding head (11) and fits against the inner wall of the chuck (10); a slot is provided around the shaft of the grinding head (11) and is connected in cooperation with the clamping block (23).

7. The 3D printing product polishing device according to claim 1, characterized in that: A bearing is rotatably mounted at the bottom center of the fixed frame (1) through a connecting rod, and the grinding platform (14) is fixedly welded to the upper part of the outer ring of the bearing. A first clamping plate (41), a second clamping plate (42), a third clamping plate and a fourth clamping plate are respectively arranged around the grinding platform (14), the first clamping plate (41) is fixedly arranged on a side of the grinding platform (14) away from the grinding wheel (19), the second clamping plate (42) is slidably arranged on the other side of the grinding platform (14) through a second electric push rod (43), the third clamping plate and the fourth clamping plate are fixedly arranged on the other two corresponding sides of the grinding platform (14), and the second electric push rod (43) is connected to the bottom of the fixed frame (1).

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