Milling device

Abstract

The utility model discloses a milling device. The milling device comprises a mounting seat, a rotary table, an air supply part, a bearing platform, a positioning part and a cutting part, the turntable is rotationally arranged on the mounting seat; the air supply piece is used for providing negative pressure air and communicates with an air pipe, and the air pipe penetrates through the rotary table. The bearing platform is arranged on the rotary table and provided with a containing cavity, the containing cavity is communicated with the air pipe, and the bearing platform can rotate relative to the air pipe. The positioning piece is arranged on the bearing platform and comprises a positioning face and an adsorption hole, the positioning face is used for bearing the workpiece, and the adsorption hole penetrates through the positioning face and communicates with the containing cavity so that the workpiece can be adsorbed to the positioning face. The cutting piece comprises a control piece and a tool, the control piece is connected with the tool, and the control piece is configured to drive the tool to move relative to the positioning face so that the tool can machine the workpiece in the positioning face. The rotary table drives the workpiece to rotate relative to the cutting piece, the cutter can machine the upper surface of the workpiece in the positioning face, the control piece controls the cutter to move relative to the positioning face, and the cutter can machine multiple side faces of the workpiece in the positioning face.

Description

Technical Field

[0001] This application belongs to the field of workpiece cutting technology, and specifically relates to a milling device. Background Technology

[0002] When milling a workpiece, to machine multiple sides, it is necessary to change the workpiece's orientation and re-clamp it after machining one side, and then machine the other side. This increases the operator's workload and results in low workpiece machining efficiency. Utility Model Content

[0003] In view of the above, it is necessary to provide a milling apparatus capable of machining multiple sides of a workpiece.

[0004] This application provides a milling apparatus, including a mounting base, a turntable, an air supply component, a support platform, a positioning component, and a cutting component. The turntable is rotatably mounted on the mounting base. The air supply component provides negative pressure gas and is connected to an air pipe that passes through the turntable. The support platform is mounted on the turntable and has a receiving cavity connected to the air pipe, and the support platform can rotate relative to the air pipe. The positioning component is mounted on the support platform and includes a positioning surface and an adsorption hole. The positioning surface supports the workpiece, and the adsorption hole passes through the positioning surface and connects to the receiving cavity to adsorb the workpiece onto the positioning surface. The cutting component includes a control component and a cutting tool. The control component is connected to the cutting tool and is configured to drive the cutting tool to move relative to the positioning surface, so that the cutting tool processes the workpiece in the positioning surface.

[0005] In the above-mentioned milling device, the air supply component provides negative pressure gas into the receiving cavity through the air pipe. The negative pressure gas acts on the workpiece in the positioning surface through the adsorption hole to adsorb the workpiece to the positioning surface, thereby positioning the workpiece in the positioning surface. The turntable drives the bearing platform, positioning component and workpiece to rotate relative to the cutting component, so that the cutting tool can process the upper surface of the workpiece in the positioning surface. The control component controls the movement of the cutting tool relative to the positioning surface, so that the cutting tool can process multiple sides of the workpiece in the positioning surface.

[0006] In some embodiments, the support platform is provided with a base and a cover plate. The base is used to rotatably connect the air pipe, the receiving cavity is provided on the base, the cover plate is connected to the base to close the receiving cavity, and the adsorption hole penetrates the cover plate to communicate with the receiving cavity.

[0007] In some embodiments, the base includes a connecting portion and an extension portion that are connected to each other. The connecting portion is used to rotatably connect to the air tube. The extension portion extends toward the adsorption hole in a first direction, so that the adsorption hole communicates with the receiving cavity. The first direction is parallel to the width direction of the positioning member.

[0008] In some embodiments, the base is provided with a frame, a retaining ring and a sealing ring. The retaining ring and the frame are continuously wrapped around the base to form a closed structure, and the frame is spaced outside the retaining ring. The sealing ring is located between the frame and the retaining ring. The frame is used to connect the cover plate so that the base, the retaining ring and the cover plate form a receiving cavity. The sealing ring is used to abut against the cover plate when the cover plate is connected to the base.

[0009] In some embodiments, the positioning surface is provided with a groove, and an adsorption hole is provided in the groove, so that negative pressure gas can enter the groove through the adsorption hole to adsorb the workpiece onto the positioning surface.

[0010] In some embodiments, the groove is continuously wrapped around the positioning surface to form a closed structure. When the positioning surface carries the workpiece, the groove and the workpiece form a sealed cavity to seal the negative pressure gas in the sealed cavity.

[0011] In some embodiments, the positioning surface is provided with a limiting hole, which is used to accommodate part of the workpiece to position the workpiece in the positioning surface; the center of the limiting hole coincides with the rotation center of the turntable, so that the workpiece rotates around the rotation center of the turntable.

[0012] In some embodiments, the support platform includes a first end region and a second end region, which are respectively located on two sides of the support platform and are diagonally distributed. The first end region is configured to connect a positioning member, and the second end region is configured to connect a counterweight. The counterweight is configured to balance the torque generated by the positioning member in the first end region on the rotation center.

[0013] In some embodiments, the positioning member is provided with a second connecting hole, and the support platform is provided with a second threaded hole. The second connecting hole corresponds to the second threaded hole. The second connecting hole is configured to insert a threaded fastener, and the second threaded hole is configured to thread a threaded fastener, so that the threaded fastener can fix the positioning member to the support platform.

[0014] In some embodiments, the milling apparatus further includes a three-axis transfer mechanism connected to the mounting base and configured to move the mounting base. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the milling device in one embodiment of this application.

[0016] Figure 2 yes Figure 1 Exploded view of the milling machine.

[0017] Figure 3 yes Figure 1 A schematic diagram of the load-bearing platform from a downward viewing angle.

[0018] Figure 4 yes Figure 1A schematic diagram of the load-bearing platform from a top-down perspective.

[0019] Figure 5 yes Figure 1 A schematic diagram of the central base.

[0020] Explanation of main component symbols

[0021] 100. Milling device; 10. Mounting base; 11. Rotary shaft; 20. Turntable; 21. First locating pin; 201. First threaded hole; 22, 421, 431. Threaded fasteners; 31. Rotary joint; 40. Bearing platform; 40a. First end region; 40b. Second end region; 401. Receiving cavity; 402. First locating hole; 403. First connecting hole; 404. Second threaded hole; 41. Base; 41a. Connecting part; 41b. Extension part; 411. Frame; 412. Retaining ring; 42. Cover plate; 43. Counterweight; 50. Locating element; 501. Second connecting hole; 51. Locating surface; 511. Groove; 512. Limiting hole; 513. Second locating pin; 52. Adsorption hole; 60. Cutting part; 61. Tool; 611. Cutting edge; 612. Tool holder; Y, First direction.

[0022] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0025] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0027] When milling a workpiece, to machine multiple sides, it is necessary to change the workpiece's orientation and re-clamp it after machining one side, and then machine the other side. This increases the operator's workload and results in low workpiece machining efficiency.

[0028] This application provides a milling apparatus, including a mounting base, a turntable, an air supply component, a support platform, a positioning component, and a cutting component. The turntable is rotatably mounted on the mounting base. The air supply component provides negative pressure gas and is connected to an air pipe that passes through the turntable. The support platform is mounted on the turntable and has a receiving cavity connected to the air pipe, and the support platform can rotate relative to the air pipe. The positioning component is mounted on the support platform and includes a positioning surface and an adsorption hole. The positioning surface supports the workpiece, and the adsorption hole passes through the positioning surface and connects to the receiving cavity to adsorb the workpiece onto the positioning surface. The cutting component includes a control component and a cutting tool. The control component is connected to the cutting tool and is configured to drive the cutting tool to move relative to the positioning surface, so that the cutting tool processes the workpiece in the positioning surface.

[0029] In the above-mentioned milling device, the air supply component provides negative pressure gas into the receiving cavity through the air pipe. The negative pressure gas acts on the workpiece in the positioning surface through the adsorption hole to adsorb the workpiece to the positioning surface, thereby positioning the workpiece in the positioning surface. The turntable drives the bearing platform, positioning component and workpiece to rotate relative to the cutting component, so that the cutting tool can process the upper surface of the workpiece in the positioning surface. The control component controls the movement of the cutting tool relative to the positioning surface, so that the cutting tool can process multiple sides of the workpiece in the positioning surface.

[0030] The embodiments of this application will be further described below with reference to the accompanying drawings. Unless otherwise specified, the various embodiments in this application can be combined with each other.

[0031] Please see Figure 1 This application provides a milling apparatus 100, including a mounting base 10, a rotary table 20, a support platform 40, a positioning element 50, and a cutting element 60. The rotary table 20 is rotatably mounted on the mounting base 10, the support platform 40 is fixedly mounted on the rotary table 20, and the positioning element 50 is fixedly mounted on the support platform 40, so that the positioning element 50 and the support platform 40 can rotate relative to the mounting base 10 with the rotary table 20. The cutting element 60 is used to machine the workpiece in the positioning surface 51.

[0032] Please see Figure 2 In some embodiments, a rotating shaft 11 is provided through the center of the mounting base 10. The turntable 20 is fixedly connected to one end of the rotating shaft 11, and the other end of the rotating shaft 11 is connected to a motor (not shown). The motor drives the rotating shaft 11 to rotate, so that the turntable 20 can rotate relative to the mounting base 10 around the rotating shaft 11.

[0033] In some embodiments, the turntable 20 is provided with a plurality of first positioning pins 21. The support platform 40 is provided with a plurality of first positioning holes 402. Each first positioning pin 21 is inserted into a first positioning hole 402, so that the first positioning pin 21 can position the support platform 40 on the turntable 20, thereby allowing the support platform 40 to rotate around the rotating shaft 11 together with the turntable 20.

[0034] In some embodiments, the support platform 40 is provided with a first connecting hole 403. The turntable 20 is provided with a first threaded hole 201. The first connecting hole 403 corresponds to the first threaded hole 201. The first connecting hole 403 is configured to insert a threaded fastener 22, and the first threaded hole 201 is configured to thread the threaded fastener 22. When the first locating pin 21 is inserted into the first connecting hole 403, the threaded fastener 22 can pass through the first connecting hole 403 and be threadedly connected to the first threaded hole 201, so as to fix the support platform 40 to the turntable 20 more stably, thereby preventing the support platform 40 from detaching from the turntable 20.

[0035] After the bearing platform 40 is positioned on the turntable 20 by the first positioning pin 21, the bearing platform 40 is fixed to the turntable 20 by the threaded fastener 22. This can prevent the first threaded hole 201 from being damaged due to incorrect connection when the threaded fastener 22 is directly connected to the bearing platform 40 and the turntable 20.

[0036] Please see Figure 2 and Figure 3 In some embodiments, the positioning member 50 is provided with a second connecting hole 501. The support platform 40 is provided with a second threaded hole 404. The second connecting hole 501 corresponds to the second threaded hole 404. The second connecting hole 501 is configured to insert a threaded fastener (not shown), and the second threaded hole 404 is configured to thread the threaded fastener so that the threaded fastener can fix the positioning member 50 to the support platform 40.

[0037] In some embodiments, the threaded fastener includes a screw, bolt, or bolt. Both the first connecting hole 403 and the second connecting hole 501 are countersunk holes.

[0038] Therefore, the positioning element 50 and the bearing platform 40 can rotate relative to the mounting base 10 with the turntable 20.

[0039] Please see Figure 2 In some embodiments, the support platform 40 is provided with a receiving cavity 401. The milling device 100 also includes an air supply component (not shown) for providing negative pressure gas. The air supply component is connected to an air pipe (not shown), and the other end of the air pipe is connected to the receiving cavity 401, so that the air supply component can provide negative pressure gas to the receiving cavity 401 through the air pipe.

[0040] In some embodiments, a rotary joint 31 is provided at the end of the air tube away from the air supply component. When the air tube is connected to the receiving cavity 401, the rotary joint 31 is connected to the support platform 40 to maintain communication between the air tube and the receiving cavity 401. By connecting the air tube and the receiving cavity 401 through the rotary joint 31, the support platform 40 can rotate relative to the air tube, and the air tube can introduce negative pressure gas into the receiving cavity 401.

[0041] In some embodiments, the gas supply device is a negative pressure generator or a vacuum pump.

[0042] Please see Figure 4 In some embodiments, the positioning element 50 includes a positioning surface 51 and an adsorption hole 52. The positioning surface 51 is used to support the workpiece. The adsorption hole 52 penetrates the positioning surface 51 and connects to the receiving cavity 401, so that the negative pressure gas in the receiving cavity 401 can adsorb the workpiece onto the positioning surface 51 through the adsorption hole 52, thereby positioning the workpiece on the positioning surface 51.

[0043] The air supply component is installed on the mounting base 10, and the air pipe passes through the turntable 20. The bearing platform 40 can rotate relative to the air pipe, so that the use of the air pipe is not affected when the turntable 20 drives the bearing platform 40 and the positioning component 50 to rotate, and the air pipe can be prevented from getting tangled as the bearing platform 40 rotates.

[0044] Please see Figure 1 The cutting element 60 includes a control element (not shown) and a cutting tool 61, with the control element connected to the cutting tool 61. The control element is configured to move the cutting tool 61 relative to the locating surface 51, so that the cutting tool 61 machines the workpiece in the locating surface 51.

[0045] The turntable 20 drives the bearing platform 40, the positioning component 50 and the workpiece to rotate relative to the cutting component 60, so that the tool 61 can process the upper surface of the workpiece in the positioning surface 51; the control component controls the movement of the tool 61 relative to the positioning surface 51, so that the tool 61 can process multiple sides of the workpiece in the positioning surface 51.

[0046] In some embodiments, the control component is a CNC machine tool. The cutting tool 61 includes a cutting edge 611 and a tool holder 612. The cutting edge 611 is connected to the tool holder 612, and the tool holder 612 is detachably connected to the spindle of the CNC machine tool. The CNC machine tool can control the rotation of the cutting tool 61 around the spindle, and the CNC machine tool can also drive the cutting tool 61 to move via the spindle to machine workpieces. By changing the cutting tool 61 connected to the spindle, different machining operations can be completed. These machining operations include cutting, drilling, polishing, etc.

[0047] In some embodiments, the CNC machine tool can drive the tool 61 to move vertically via the spindle. In the illustrated embodiment, the vertical direction refers to the height direction of the mounting base 10.

[0048] In some embodiments, the upper surface of the workpiece refers to the front side of the workpiece, the back side of the workpiece is attached to the positioning surface 51, the front side of the workpiece is positioned opposite to the front side of the workpiece, and the multiple sides of the workpiece refer to the other surfaces of the workpiece besides the front and back sides.

[0049] Therefore, after positioning the workpiece on the positioning surface 51, the milling device 100 can process any surface of the workpiece that does not contact the positioning surface 51. Compared to constantly adjusting the orientation of the workpiece and re-clamping it, this reduces the labor intensity of the operator and effectively improves the processing efficiency of the workpiece.

[0050] In some embodiments, the milling apparatus 100 further includes a three-axis transfer mechanism (not shown). A mounting base 10 is connected to the three-axis transfer mechanism. The three-axis transfer mechanism is configured to move the mounting base 10 in three-dimensional space, thereby adjusting the relative position between the positioning surface 51 and the cutting workpiece 60 to facilitate the machining of multiple sides of the workpiece by the tool 61.

[0051] Please see Figure 4 In some embodiments, the positioning surface 51 is provided with a groove 511. An adsorption hole 52 is provided in the groove 511, so that negative pressure gas can enter the groove 511 through the adsorption hole 52, thereby adsorbing the workpiece onto the positioning surface 51.

[0052] By setting the groove 511, the contact area between the negative pressure gas and the workpiece is increased, that is, the area where the positioning surface 51 can adsorb the workpiece, thereby more stably adsorbing the workpiece onto the positioning surface 51.

[0053] In some embodiments, the groove 511 is continuously wrapped around the positioning surface 51 to form a closed structure. When the positioning surface 51 carries the workpiece, the groove 511 and the workpiece form a sealed cavity to seal the negative pressure gas in the sealed cavity, thereby giving the negative pressure gas in the groove 511 a large adsorption force to adsorb the workpiece to the positioning surface 51.

[0054] In some embodiments, the closed structure includes a rectangle, a circle, or a polygon, and those skilled in the art can choose according to the shape of the workpiece.

[0055] In some embodiments, the workpiece is the casing of an electronic product. The shape of the positioning surface 51 is adapted to the shape of the workpiece.

[0056] In some embodiments, the positioning surface 51 is provided with two second positioning pins 513. The second positioning pins 513 are used to insert into the workpiece when the positioning surface 51 carries the workpiece, so as to position the workpiece in the positioning surface 51.

[0057] In some embodiments, a limiting hole 512 is provided at one corner of the positioning surface 51. The workpiece is the outer shell of a tablet computer. The limiting hole 512 is used to accommodate the part of the workpiece corresponding to the camera of the tablet computer, so that the positioning surface 51 can be adapted to the shape of the workpiece, and the limiting hole 512 can position the workpiece in the positioning surface 51.

[0058] In some embodiments, the center of the limiting hole 512 coincides with the rotation center of the turntable 20. When the workpiece rotates together with the support platform 40, the rotation centers of the workpiece, the positioning element 50, the support platform 40, and the turntable 20 all coincide, and the limiting hole 512 can position the rotation center of the workpiece during the processing. The rotation center is the center of the rotating shaft 11.

[0059] In some embodiments, both the support platform 40 and the positioning member 50 are rectangular. One corner of the positioning member 50 coincides with the center of the support platform 40, and the rotation center of the turntable 20 passes through the center of the support platform 40.

[0060] Please see Figure 3 and Figure 4 In some embodiments, the support platform 40 includes a first end region 40a and a second end region 40b. The first end region 40a and the second end region 40b are respectively located on opposite sides of the support platform 40 in the vertical direction. The first end region 40a and the second end region 40b are diagonally distributed. The first end region 40a is configured to connect to a positioning member 50, and the second end region 40b is configured to connect to a counterweight 43. The counterweight 43 is configured to balance the torque generated by the positioning member 50 in the first end region 40a about the rotation center.

[0061] When the positioning surface 51 carries the workpiece and the turntable 20 drives the bearing platform 40 to rotate around the rotating shaft 11, the counterweight 43 can balance the torque generated by the positioning component 50 and the workpiece on the rotation center, so that the bearing platform 40 can maintain the stability of rotation.

[0062] Please see Figure 3 In some embodiments, the counterweight 43 is fixed to the support platform 40 by threaded fasteners 431.

[0063] Please see Figure 3 and Figure 5 In some embodiments, the support platform 40 is provided with a base 41 and a cover plate 42. The base 41 is disposed on the support platform 40. The base 41 is rotatably connected to the air pipe via a rotary joint 31, so that the air supply component can provide negative pressure gas to the receiving cavity 401 through the air pipe and the rotary joint 31. The receiving cavity 401 is disposed on the base 41, and the cover plate 42 is stacked on the base 41 to cover and seal the receiving cavity 401, thereby preventing the leakage of negative pressure gas. The adsorption hole 52 penetrates the cover plate 42 to communicate with the receiving cavity 401, so that the receiving cavity 401 can provide negative pressure gas to the adsorption hole 52.

[0064] During assembly, the air tube is rotatably connected to the base 41, and the cover plate 42, which communicates with the adsorption hole 52, is connected to the base 41, thus forming a receiving cavity 401 that connects the air tube and the adsorption hole 52. The structure is simple and easy to assemble.

[0065] Please see Figure 3 In some embodiments, the base 41 and the cover plate 42 are detachably connected by threaded fasteners 421.

[0066] In some embodiments, the base 41 and the support platform 40 are integrally formed. The base 41 and the support platform 40 may also be embedded in the support platform 40 and fixedly connected by threaded fasteners 421.

[0067] Please see Figure 5 In some embodiments, the base 41 includes a connecting portion 41a and an extension 41b that are interconnected. The connecting portion 41a is used to connect an air tube, allowing negative pressure gas to be introduced into the receiving cavity 401 through the air tube. The connecting portion 41a is rotatably connected to the air tube via a rotary joint 31, allowing the base 41 to rotate relative to the air tube to prevent the air tube from becoming entangled due to rotation with the support platform 40. Please refer to [link to relevant documentation]. Figure 3 and Figure 5 Along the first direction Y, the extension 41b extends toward the adsorption hole 52, so that the adsorption hole 52 passes through the cover plate 42 and corresponds to the extension 41b, thereby connecting the adsorption hole 52 to the receiving cavity 401, that is, the negative pressure gas in the receiving cavity 401 can act on the workpiece in the positioning surface 51. In the illustrated embodiment, the first direction Y is parallel to the width direction of the positioning member 50.

[0068] The base 41 is rotatably connected to the air pipe via the connecting part 41a, and the extension part 41b corresponds to the adsorption hole 52, so that the receiving cavity 401 can provide negative pressure gas to the adsorption hole 52 with less space occupied, thereby achieving the effect of saving the space occupied by the receiving cavity 401.

[0069] Please see Figure 5 In some embodiments, the extending direction of the connecting portion 41a is perpendicular to the extending direction of the extending portion 41b, i.e., the base 41 is L-shaped. When the area occupied by the connecting portion 41a is small, a rotary joint 31 can be connected to allow the air pipe and the support platform 40 to rotate relative to each other. When the area occupied by the extending portion 41b is small, it can correspond to the adsorption hole 52, allowing the air pipe to provide negative pressure gas to the adsorption hole 52.

[0070] Therefore, compared to a rectangular or circular base 41, an L-shaped base 41 allows the connecting part 41a and the extension part 41b to occupy a smaller area of ​​the support platform 40, thus leaving more space for the support platform 40. When the support platform 40 is connected to the turntable 20 by the threaded fastener 22, or when the support platform 40 is connected to the positioning part 50 by the threaded fastener, the threaded fastener can avoid the receiving cavity 401, thereby preventing the leakage of negative pressure gas in the receiving cavity 401.

[0071] In some embodiments, the base 41 is provided with a frame 411 and a retaining ring 412. Both the retaining ring 412 and the frame 411 are continuously wrapped around the base 41 to form a closed structure, with the frame 411 spaced outwards from the retaining ring 412, allowing a sealing ring to be located between the retaining ring 412 and the frame 411. The frame 411 is used to connect to the cover plate 42, so that the base 41, the retaining ring 412, and the cover plate 42 form a receiving cavity 401. The sealing ring is used to abut against the cover plate 42 when it is connected to the base 41, thereby improving the sealing performance of the receiving cavity 401 and preventing leakage of negative pressure gas in the receiving cavity 401. The closed structure is L-shaped to fit the shape of the base 41.

[0072] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. A milling device, characterized in that, include: Mounting base; A turntable is rotatably mounted on the mounting base; An air supply unit is used to provide negative pressure gas. The air supply unit is connected to an air pipe, which passes through the turntable. A support platform is provided on the turntable. The support platform has a receiving cavity, which is connected to the air pipe, and the support platform can rotate relative to the air pipe. A positioning element is provided on the bearing platform. The positioning element includes a positioning surface and an adsorption hole. The positioning surface is used to support the workpiece, and the adsorption hole passes through the positioning surface and connects to the receiving cavity to adsorb the workpiece onto the positioning surface. A cutting element includes a control element and a cutting tool, the control element being connected to the cutting tool and configured to move the cutting tool relative to the positioning surface so that the cutting tool processes the workpiece in the positioning surface.

2. The milling device of claim 1, wherein, The support platform is provided with a base and a cover plate. The base is used to rotatably connect the air pipe. The receiving cavity is located on the base. The cover plate is connected to the base to close the receiving cavity. The adsorption hole passes through the cover plate to communicate with the receiving cavity.

3. The milling device of claim 2, wherein, The base includes a connecting part and an extension part that are connected to each other. The connecting part is used to rotatably connect the air tube. The extension part extends toward the adsorption hole along a first direction, so that the adsorption hole communicates with the receiving cavity. The first direction is parallel to the width direction of the positioning member.

4. The milling device of claim 2, wherein, The base is provided with a frame, a retaining ring and a sealing ring. The retaining ring and the frame are continuously wrapped around the base to form a closed structure, and the frame is spaced out on the outside of the retaining ring. The sealing ring is located between the frame and the retaining ring. The frame is used to connect the cover plate so that the base, the retaining ring and the cover plate form the receiving cavity. The sealing ring is used to abut against the cover plate when the cover plate is connected to the base.

5. The milling device according to any one of claims 1 to 4, characterized in that The positioning surface is provided with a groove, and the adsorption hole is provided in the groove, so that the negative pressure gas can enter the groove through the adsorption hole to adsorb the workpiece onto the positioning surface.

6. The milling device of claim 5, wherein, The groove continuously surrounds the positioning surface to form a closed structure. When the positioning surface carries the workpiece, the groove and the workpiece form a sealed cavity to seal the negative pressure gas inside the sealed cavity.

7. The milling device according to any one of claims 1 to 4, characterized in that The positioning surface is provided with a limiting hole, which is used to accommodate part of the workpiece to position the workpiece in the positioning surface; The center of the limiting hole coincides with the rotation center of the turntable, causing the workpiece to rotate around the rotation center of the turntable.

8. The milling device of claim 7, wherein, The bearing platform includes a first end region and a second end region, which are respectively located on two sides of the bearing platform and are diagonally distributed. The first end region is configured to connect to the positioning member, and the second end region is configured to connect to a counterweight. The counterweight is configured to balance the torque generated by the positioning member in the first end region on the rotation center.

9. The milling device of claim 1, wherein, The positioning member is provided with a second connecting hole, the bearing platform is provided with a second threaded hole, the second connecting hole corresponds to the second threaded hole, the second connecting hole is configured to be inserted with a threaded fastener, and the second threaded hole is configured to be threadedly connected with the threaded fastener, so that the threaded fastener can fixedly connect the positioning member to the bearing platform.

10. The milling device of claim 1, wherein, The milling device further comprises a three-axis moving mechanism connected with the mounting seat and configured to drive the mounting seat to move.

Images