A mobile phone case rotary table CNC sanding machine

Abstract

The present invention relates to the field of polishing equipment, and discloses a mobile phone case turntable CNC sanding machine, comprising a feeding conveyor belt, a discharging conveyor belt, a frame, a column, a worktable and a workpiece rotating mechanism, wherein the workpiece rotating mechanism comprises a turntable and a driving device, a feeding mechanism is provided on one side of the turntable, a loading and unloading station, a first grinding station, a second pressing station and a second grinding station are provided on the frame at intervals, the turntable is provided with four station positioning groups, the station positioning group comprises a number of workpiece fixtures, the loading and unloading station and the second pressing station are respectively provided with a pressing device, the first grinding station and the second grinding station are respectively provided with a grinding device, the grinding device comprises a three-axis displacement mechanism, a mounting seat, a polishing grinding wheel, an executive part and a rotating power mechanism, the mounting seat is provided with a rotating power mechanism, and the rotating power mechanism is connected to the polishing grinding wheel through the executive part. The mobile phone case is repeatedly polished and corrected by two pressing devices and two grinding devices, so that the surface of the mobile phone case is flat and smooth.

Description

Technical Field

[0001] The invention relates to the field of polishing equipment, in particular to a mobile phone shell turntable numerical control sanding machine. Background Art

[0002] With the rapid development of communication technology, mobile phones are widely used. In the process of mobile phone development, the mobile phone shell highlights its particularly important position. The mobile phone shell has the function of protecting the mobile phone from being broken. The material of the mobile phone shell is generally plastic, but there are also metal mobile phone shells. During the production and processing of mobile phones, the mobile phone will be polished, especially the metal mobile phone shell, because its surface is easy to scratch, so the polishing process is very important.

[0003] In the polishing of existing mobile phone shells, a polishing machine is usually used to polish the middle frame of the mobile phone. However, when the existing polishing machine is in use, the mobile phone shell is mostly fixed in one place for polishing, and generally only one mobile phone shell can be polished. When the mobile phone shell is polished, the polished mobile phone shell needs to be disassembled. If a polishing robot is used for polishing, the manual maintenance cost is high. Summary of the invention

[0004] The object of the present invention is to provide a mobile phone case turntable CNC sanding machine to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a mobile phone case turntable CNC sanding machine, comprising a feeding conveyor belt and a discharging conveyor belt arranged in parallel and closely, a frame is provided on one side of the feeding conveyor belt, a workbench is provided on the frame, a workpiece rotating mechanism is provided on the workbench, the workpiece rotating mechanism comprises a turntable and a driving device for driving the turntable to rotate, a column is fixedly provided on the upper surface of the frame on one side of the workbench, a loading mechanism is provided on the upper end of the column, loading and unloading stations, a first grinding station, a second pressing station and a second grinding station are evenly spaced along the circumferential direction on the frame, and the turntable is provided with stations corresponding to the loading and unloading stations, the first grinding station, the second pressing station and the second grinding station Positioning group, the workstation positioning group includes a number of workpiece fixtures arranged in parallel for installing the mobile phone shell, the loading and unloading station and the second pressing station are respectively provided with a pressing device, the first grinding station and the second grinding station are respectively provided with a grinding device, the grinding device includes a three-axis displacement mechanism, a mounting seat, a polishing wheel, an actuator and a rotating power mechanism for driving the actuator to rotate, the first grinding station and the second grinding station are respectively provided with a three-axis displacement mechanism, the three-axis displacement mechanism is provided with a mounting seat, the actuator is rotatably provided on the mounting seat, the lower end of the actuator is provided with a polishing wheel, the upper end of the actuator is connected to the rotating power mechanism, and the spacing between adjacent actuators is consistent with the spacing between adjacent workpiece fixtures. The loading mechanism is used to load and unload the workpiece fixture near the loading and unloading station. After the mobile phone shell is transferred to the turntable, it moves in a circular motion and passes through the loading and unloading station, the first grinding station, the second pressing station and the second grinding station in sequence and finally returns to the loading and unloading station. The grinding devices on the first grinding station and the second grinding station are used to grind and polish the mobile phone shell in turn. The pressing device of the loading and unloading station performs preliminary pressing correction and the third pressing correction, and the pressing device of the second pressing station performs secondary correction.

[0006] Furthermore, the pressing device includes a bracket, a guide rail, a horizontal cylinder, a pressing mounting plate, and a pressing part. The bracket is mounted on the frame, and the guide rail and the horizontal cylinder are arranged in parallel on the bracket. The pressing mounting plate is slidably connected to the guide rail, and the pressing mounting plate is fixedly connected to the piston rod of the horizontal cylinder. A plurality of pressing parts are evenly spaced on the lower end surface of the pressing mounting plate. The horizontal cylinder pushes the pressing mounting plate to make a linear motion, and the pressing part and the workpiece fixture are adapted to the upper surface of the mobile phone shell, and the lower surface of the mobile phone shell is adapted to the workpiece fixture. The pressing part and the workpiece fixture cooperate to correct the mobile phone shell to prevent the edge of the mobile phone shell from warping during the polishing process.

[0007] Furthermore, the pressing part includes a jig pressing plate and a thin cylinder adapted to the workpiece jig, and the lower end surface of the pressing mounting plate is evenly spaced with thin cylinders, and the thin cylinder is connected to the jig pressing plate. The thin cylinder is used to drive the jig pressing plate to move up and down, and the jig pressing plate is pressed by the thin cylinder so that the jig pressing plate is tightly combined with the workpiece jig to correct the edge of the mobile phone housing.

[0008] Furthermore, the feeding mechanism includes a mounting plate, a linear module, a sliding table, a support arm, a rotating cylinder, a loading and unloading motor, a driving wheel, a rack, a mounting seat, and a grabbing part. A mounting plate is fixedly provided at the upper end of the column, and a sliding table is connected to the side of the mounting plate through a linear module. A rack is horizontally provided on the mounting plate, and a support arm and a loading and unloading motor are provided on the sliding table. The loading and unloading motor is connected to a driving wheel that matches the rack. A rotating cylinder is provided at the lower end of the support arm, and the upper surface of the mounting seat is fixedly connected to the rotating cylinder, and a grabbing part is provided on the lower surface of the mounting seat. The loading and unloading motor rotates the driving wheel, and the driving wheel rotates to drive the sliding table to move along the length direction of the rack. The mounting seat is driven to rotate by the rotating cylinder, and the grabbing part is installed on the mounting seat. The grabbing part is used to grab the mobile phone shell, and the mounting seat is driven to rotate by the rotating cylinder. The rack and the driving wheel cooperate to make the grabbing part move horizontally, and the feeding mechanism grabs the mobile phone shell and then translates.

[0009] Furthermore, the gripping part includes a suction cup hanger and a suction cup group. The suction cup hanger is fixedly arranged on the lower surface of the mounting seat. The suction cup group is arranged at intervals on the lower surface of the suction cup hanger. The suction cup group includes a plurality of vacuum suction cups arranged at even intervals. The suction cup group is used to absorb the mobile phone shell to avoid scratches on the surface of the mobile phone shell. After the suction cup group absorbs the mobile phone shell on the turntable, the rotating cylinder drives the suction cup hanger to rotate, so that the mobile phone shell rotates to facilitate loading.

[0010] Furthermore, the rotating power mechanism includes a polishing motor, a driving pulley, a driven wheel group, a first belt and two second belts. The mounting seat is provided with a polishing motor, the polishing motor is connected to the driving pulley, the upper end of the actuator is provided with a driven wheel group, adjacent driven wheel groups are connected by a second belt transmission, and the driving pulley is connected to the driven wheel group by a first belt transmission.

[0011] Furthermore, the three-axis displacement mechanism includes an X-axis screw pair, a Y-axis support seat, a Y-axis screw pair, a Z-axis support seat and a Z-axis screw pair. A symmetrical X-axis ram is fixed on the frame, the X-axis ram is slidably connected to the Y-axis support seat, an X-axis screw pair is provided between two X-axis rams on the frame, a symmetrical Y-axis ram is fixed on the side of the Y-axis support seat, the Y-axis ram is slidably connected to the Z-axis support seat, a Y-axis screw pair is provided between the two Y-axis rams, a symmetrical vertical slide is provided on the Z-axis support seat, the vertical slide is slidably connected to the mounting seat, and a Z-axis screw pair is provided between the two vertical slides. The X-axis screw pair is used to drive the Y-axis support seat to perform linear motion, the Y-axis screw pair is used to drive the Z-axis support seat to perform horizontal motion, and the Z-axis screw pair is used to drive the mounting seat to move up and down.

[0012] Furthermore, the execution part is a rotating body, and a threaded hole for installing a polishing wheel is provided in the middle of the lower end surface of the execution part. The polishing wheel is threadedly connected to the execution part, which is convenient for installing and removing the polishing wheel.

[0013] Furthermore, the polishing wheel is a sponge grinding head. The sponge material is used as the grinding head, and the sponge is soft and will not scratch the mobile phone housing.

[0014] Furthermore, a concave portion is provided on the turntable corresponding to the workpiece fixture, and the shape of the concave portion is adapted to the workpiece fixture to prevent the workpiece fixture from being offset due to the rotation of the turntable.

[0015] The beneficial effects of the present invention are as follows: the mobile phone shell is corrected three times by two pressing devices to avoid warping of the edge of the mobile phone shell during the polishing process; the mobile phone shell is polished successively by two grinding devices; and repeated polishing is beneficial to improving the smoothness of the mobile phone shell, so that the surface of the mobile phone shell is flat and smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings further illustrate the present invention, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0017] Figure 1 A schematic diagram of the structure of a mobile phone case rotary table CNC sanding machine provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of a pressing device provided in one embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the structure of a grinding device provided by an embodiment of the present invention;

[0020] Figure 4 A partial schematic diagram of a mobile phone case rotary table CNC sanding machine provided in one embodiment of the present invention;

[0021] Figure 5 A schematic structural diagram of a feeding mechanism provided in one embodiment of the present invention;

[0022] Figure 6 A partial schematic diagram of a mobile phone case rotary table CNC sanding machine provided in one embodiment of the present invention.

[0023] Markings in the figure: 1: feeding conveyor belt; 2: discharging conveyor belt; 3: mobile phone housing; 401: frame; 402: workbench; 501: turntable; 502: workpiece fixture; 6: column; 7: feeding mechanism; 701: mounting plate; 702: linear module; 703: sliding table; 704: support arm; 705: loading and unloading motor; 706: rack; 707: rotary cylinder; 708: suction cup hanger; 709: suction cup assembly ;8: Pressing device;801: Bracket;802: Guide rail;803: Horizontal cylinder;804: Pressing mounting plate;805: Thin cylinder;806: Jig pressing plate;9: Grinding device;901: Polishing motor;902: Driving pulley;903: Driven pulley group;904: First belt;905: Second belt;906: Actuator;907: Polishing grinding wheel;908: Mounting seat;10: Three-axis displacement mechanism. DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element at the same time, and the directional words used, such as "upper, lower, left, right" generally refer to the other element. Figure 1 "Inside and outside" refer to the inside and outside of a specific outline. "Far and near" refer to the far and near relative to a certain component.

[0026] like Figure 1-Figure 6As shown in the figure, a mobile phone case turntable CNC sanding machine provided by an embodiment of the present invention comprises a feeding conveyor belt 1 and a discharging conveyor belt 2 which are arranged in parallel and closely, the feeding conveyor belt 1 and the discharging conveyor belt 2 have the same conveying direction, a frame 401 is provided on one side of the feeding conveyor belt 1, a plurality of travel wheels are installed at the bottom of the frame 401, a workbench 402 is provided on the frame 401, a workpiece rotating mechanism is provided on the workbench 402, and the workpiece rotating mechanism comprises a turntable 501 and a driving mechanism for driving the turntable 501 to rotate. The driving device includes a motor, a rotating shaft connected to the turntable 501, an elastic coupling and a cam divider. The motor is connected to the cam divider through an elastic coupling, and the rotating shaft is connected to the cam divider through an elastic coupling. The upper end of the rotating shaft is fixedly connected to the middle position of the bottom surface of the turntable 501 by screws. A column 6 is fixedly arranged on the upper surface of the frame 401 on one side of the workbench 402. The column 6 is in an inverted L shape. A loading mechanism 7 is arranged on the upper end of the column 6. Loading and unloading mechanisms are evenly spaced along the circumferential direction on the frame 401. The turntable 501 is provided with a station positioning group corresponding to the loading and unloading station, the first grinding station, the second pressing station and the second grinding station. The station positioning group includes three parallel workpiece fixtures 502 for installing the mobile phone shell body. The loading and unloading station and the second pressing station are respectively provided with a pressing device 8. The first grinding station and the second grinding station are respectively provided with a grinding device 9. The grinding device 9 includes a three-axis displacement mechanism 10, a mounting seat 90 8. A polishing wheel 907, an execution part 906 and a rotating power mechanism for driving the execution part 906 to rotate. The first grinding station and the second grinding station are respectively provided with a three-axis displacement mechanism 10. The three-axis displacement mechanism 10 is provided with a mounting seat 908. The execution part 906 is rotatably provided on the mounting seat 908. A polishing wheel 907 is provided at the lower end of the execution part 906. The upper end of the execution part 906 is connected to the rotating power mechanism. The spacing between adjacent execution parts 906 is consistent with the spacing between adjacent workpiece fixtures 502. The loading mechanism 7 is used to load and unload the workpiece fixture 502 near the loading and unloading station. After the mobile phone shell is transferred to the turntable 501, it moves in a circle and passes through the loading and unloading station, the first grinding station, the second pressing station and the second grinding station in sequence and finally returns to the loading and unloading station. The grinding devices 9 on the first grinding station and the second grinding station are used to grind and polish the mobile phone shell 3 in turn. The pressing device 8 of the loading and unloading station performs preliminary pressing correction and the third pressing correction, and the pressing device 8 of the second pressing station performs secondary correction.

[0027] The pressing device 8 comprises a bracket 801, a guide rail 802, a horizontal cylinder 803, a pressing mounting plate 804701, and a pressing part. The bracket 801 is mounted on the frame 401, and the guide rail 802 and the horizontal cylinder 803 are arranged in parallel on the bracket 801. The pressing mounting plate 804701 is slidably connected to the guide rail 802. The pressing mounting plate 804701 is fixedly connected to the piston rod of the horizontal cylinder 803, and three pressing parts are evenly spaced on the lower end surface of the pressing mounting plate 804701. The horizontal cylinder 803 pushes the pressing mounting plate 804701 to make a linear motion, and the pressing part and the upper surface of the mobile phone shell 3 are adapted, and the workpiece fixture 502 and the lower surface of the mobile phone shell 3 are adapted. The pressing part and the workpiece fixture 502 cooperate to correct the mobile phone shell 3 to prevent the edge of the mobile phone shell from warping during the polishing process.

[0028] The pressing part includes a jig pressing plate 806 and a thin cylinder 805 adapted to the workpiece jig 502. The lower end surface of the pressing mounting plate 804701 is evenly spaced with thin cylinders 805, and the thin cylinder 805 is connected to the jig pressing plate 806. The thin cylinder 805 is used to drive the jig pressing plate 806 to move up and down. The jig pressing plate 806 is pressed by the thin cylinder 805 so that the jig pressing plate 806 is tightly combined with the workpiece jig 502 to correct the edge of the mobile phone housing 3.

[0029] The feeding mechanism 7 includes a mounting plate 701, a linear module 702, a sliding table 703, a support arm 704, a rotating cylinder 707, a loading and unloading motor 705, a driving wheel, a rack 706, a mounting seat 908, and a grasping portion. A mounting plate 701 is fixedly provided at the upper end of the column 6, and a sliding table 703 is connected to the side of the mounting plate 701 through a linear module 702. A rack 706 is horizontally provided on the mounting plate 701, a support arm 704 and a loading and unloading motor 705 are provided on the sliding table 703, and the loading and unloading motor 705 is connected to a driving wheel matched with the rack 706. A rotating cylinder 707 is provided at the lower end of the support arm 704, the upper surface of the mounting seat 908 is fixedly connected to the rotating cylinder 707, and a grasping portion is provided on the lower surface of the mounting seat 908. The loading and unloading motor 705 works to rotate the driving wheel, and the driving wheel rotates to drive the sliding table 703 to move along the length direction of the rack 706. The rotating cylinder 707 is used to drive the mounting seat 908 to rotate, and the grabbing part is installed on the mounting seat 908. The grabbing part is used to grab the mobile phone shell 3. The mounting seat 908 is driven to rotate by the rotating cylinder 707. The rack 706 and the driving wheel cooperate to make the grabbing part move horizontally, and the feeding mechanism 7 grabs the mobile phone shell 3 and then moves horizontally.

[0030] The gripping part includes a suction cup hanger 708 and a suction cup group 709. The suction cup hanger 708 is fixedly arranged on the lower surface of the mounting seat 908. The suction cup group 709 is arranged at intervals on the lower surface of the suction cup hanger 708. The suction cup group 709 includes a plurality of vacuum suction cups arranged at even intervals. The spacing between adjacent suction cup hangers 708 is consistent with the spacing between adjacent workpiece fixtures 502. The suction cup group 709 is used to absorb the mobile phone shell 3 to avoid scratches on the surface of the mobile phone shell 3. After the suction cup group 709 absorbs the mobile phone shell 3 on the turntable 501, the rotating cylinder 707 works to drive the suction cup hanger 708 to rotate, so that the mobile phone shell 3 is turned over to facilitate the feeding mechanism 7 to place the mobile phone shell 3 on the workpiece fixture 502.

[0031] The rotating power mechanism includes a polishing motor 901, a driving pulley 902, a driven wheel group 903, a first belt 904 and two second belts 905. The mounting seat 908 is provided with a polishing motor 901, and the polishing motor 901 is connected to the driving pulley 902. The upper end of the actuator 906 is sleeved with a driven wheel group 903. The driven wheel group 903 consists of two pulleys, and the two pulleys are key-connected to the actuator 906. Adjacent driven wheel groups 903 are connected by the second belt 905, and the driving pulley 902 is connected to the driven wheel group 903 by the first belt 904.

[0032] The three-axis displacement mechanism 10 includes an X-axis screw pair, a Y-axis support seat, a Y-axis screw pair, a Z-axis support seat and a Z-axis screw pair. A symmetrical X-axis slide is fixedly provided on the frame 401, and the X-axis slide is slidably connected with the Y-axis support seat through a linear module 702. An X-axis screw pair is provided between two X-axis slides on the frame 401, and the Y-axis support seat is fixedly connected to the screw nut of the X-axis screw pair. A symmetrical Y-axis slide is fixedly provided on the side of the Y-axis support seat, and the Z-axis support seat is slidably connected to the Y-axis support seat through a linear module 702. A Y-axis screw pair is provided between the two Y-axis slides, and the Z-axis support seat is fixedly connected to the screw nut of the Y-axis screw pair. A symmetrical vertical slide groove is opened on the Z-axis support seat, and a mounting seat 908 is slidably connected in the vertical slide groove through a linear module 702. A Z-axis screw pair is provided between the two vertical slide grooves, and the side of the mounting seat 908 is fixedly connected to the screw nut of the Z-axis screw pair.

[0033] The execution part 906 is a rotating body, and a threaded hole for installing a polishing wheel 907 is provided in the middle of the lower end surface of the execution part 906. The polishing wheel 907 is threadedly connected to the execution part 906, so that the polishing wheel 907 can be easily installed and removed.

[0034] The polishing wheel 907 is a sponge grinding head. The sponge material is used as the grinding head, and the sponge is soft and will not scratch the mobile phone housing 3.

[0035] The turntable 501 is provided with a recessed portion corresponding to the workpiece fixture 502. The shape of the recessed portion matches the workpiece fixture 502 to prevent the workpiece fixture 502 from being offset by the rotation of the turntable 501. The workpiece fixture 502 is in a rectangular parallelepiped shape, and the recessed portion is a rectangular slot structure.

[0036] The working principle of the present invention is as follows: a loading mechanism 7 is used to load and unload a workpiece fixture 502 close to a loading and unloading station, and a mobile phone shell 3 on the feeding conveyor belt 1 is transported to a turntable 501 by the loading mechanism 7. After the mobile phone shell is transferred to the turntable 501, it moves in a circular motion and passes through the loading and unloading station, the first grinding station, the second pressing station and the second grinding station in sequence and finally returns to the loading and unloading station. After the mobile phone shell is transferred to the turntable 501, the mobile phone shell is preliminarily corrected by the pressing device 8 of the loading and unloading station. The preliminarily corrected mobile phone shell 3 is preliminarily polished by the grinding device 9 of the first grinding station, and the preliminarily polished mobile phone shell is secondarily corrected by the pressing device 8 of the second pressing station. The mobile phone shell 3 after the second correction is secondarily polished by the grinding device 9 of the second grinding station, and the mobile phone shell 3 after the second grinding is thirdly corrected by the pressing device 8 of the loading and unloading station. The mobile phone shell 3 after the third correction is transported to the discharge conveyor belt 2 by the loading mechanism 7.

[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A mobile phone case turntable CNC sanding machine, characterized by: The machine comprises a feeding conveyor belt and a discharging conveyor belt which are arranged closely in parallel, a frame is arranged on one side of the feeding conveyor belt, a workbench is arranged on the frame, a workpiece rotating mechanism is arranged on the workbench, the workpiece rotating mechanism comprises a turntable and a driving device for driving the turntable to rotate, a column is fixedly arranged on the upper surface of the frame on one side of the workbench, a feeding mechanism is arranged on the upper end of the column, loading and unloading stations, a first grinding station, a second pressing station and a second grinding station are evenly spaced along the circumferential direction on the frame, and station positioning groups are arranged on the turntable corresponding to the loading and unloading stations, the first grinding station, the second pressing station and the second grinding station, and the station positioning groups comprise a plurality of parallelly arranged A workpiece fixture for installing a mobile phone shell body, the loading and unloading station and the second pressing station are respectively provided with a pressing device, the first grinding station and the second grinding station are respectively provided with a grinding device, the grinding device comprises a three-axis displacement mechanism, a mounting seat, a polishing wheel, an actuator and a rotating power mechanism for driving the actuator to rotate, the first grinding station and the second grinding station are respectively provided with a three-axis displacement mechanism, the three-axis displacement mechanism is provided with a mounting seat, an actuator is rotatably provided on the mounting seat, a polishing wheel is provided at the lower end of the actuator, a rotating power mechanism is connected to the upper end of the actuator, and the spacing between adjacent actuators is consistent with the spacing between adjacent workpiece fixtures; The pressing device comprises a bracket, a guide rail, a horizontal cylinder, a pressing mounting plate, and a pressing part. The bracket is mounted on the frame, the guide rail and the horizontal cylinder are arranged in parallel on the bracket, the pressing mounting plate is slidably connected to the guide rail, the pressing mounting plate is fixedly connected to the piston rod of the horizontal cylinder, and a plurality of pressing parts are evenly spaced on the lower end surface of the pressing mounting plate; The feeding mechanism includes a mounting plate, a linear module, a sliding table, a support arm, a rotary cylinder, a loading and unloading motor, a driving wheel, a rack, a grabbing mounting seat, and a grabbing portion. A mounting plate is fixedly provided at the upper end of the column, and a sliding table is connected to the side of the mounting plate through a linear module. A rack is horizontally provided on the mounting plate, and a support arm and a loading and unloading motor are provided on the sliding table. The loading and unloading motor is connected to a driving wheel matched with the rack. A rotary cylinder is provided at the lower end of the support arm, and the upper surface of the grabbing mounting seat is fixedly connected to the rotary cylinder, and a grabbing portion is provided on the lower surface of the grabbing mounting seat. The rotary power mechanism comprises a polishing motor, a driving pulley, a driven pulley group, a first belt and a plurality of second belts, the mounting seat is provided with a polishing motor, the polishing motor is connected to the driving pulley, the upper end of the execution part is sleeved with a driven pulley group, adjacent driven pulley groups are connected through the second belt transmission, and the driving pulley is connected to the driven pulley group through the first belt transmission; The three-axis displacement mechanism includes an X-axis screw pair, a Y-axis support seat, a Y-axis screw pair, a Z-axis support seat and a Z-axis screw pair. A symmetrical X-axis slide is fixed on the frame, and the X-axis slide is slidably connected to the Y-axis support seat. An X-axis screw pair is provided between two X-axis slides on the frame, a symmetrical Y-axis slide is fixed on the side of the Y-axis support seat, and the Y-axis slide is slidably connected to the Z-axis support seat, a Y-axis screw pair is provided between the two Y-axis slides, and a symmetrical vertical slide groove is opened on the Z-axis support seat, the vertical slide groove is slidably connected to the mounting seat, and a Z-axis screw pair is provided between the two vertical slide grooves.

2. According to claim 1, the mobile phone case turntable CNC sanding machine is characterized by: The pressing part comprises a jig pressing plate and a thin cylinder adapted to the workpiece jig. The lower end surface of the pressing mounting plate is evenly spaced with thin cylinders, and the thin cylinder is connected with the jig pressing plate.

3. According to claim 1, the mobile phone case turntable CNC sanding machine is characterized in that: The gripping part comprises a suction cup hanger and a suction cup group. The suction cup hanger is fixedly arranged on the lower surface of the gripping mounting seat. The suction cup group is arranged at intervals on the lower surface of the suction cup hanger. The suction cup group comprises a plurality of vacuum suction cups arranged evenly at intervals.

4. The mobile phone case rotary table CNC sanding machine according to claim 1, characterized in that: The execution part is a rotating body, and a threaded hole for installing a polishing grinding wheel is provided in the middle of the lower end surface of the execution part.

5. According to claim 1, the mobile phone case rotary table CNC sanding machine is characterized in that: The polishing grinding wheel is a sponge grinding head.

6. The mobile phone case rotary table CNC sanding machine according to claim 1, characterized in that: The turntable is provided with a recessed portion corresponding to the workpiece fixture.

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