A CNC machine tool for manufacturing high-precision graphite screws

Abstract

A CNC machine tool for preparing high-precision graphite screws relates to the field of graphite threaded rod preparation equipment. It includes a transfer mechanism, a feeding mechanism, and an automatic grinding mechanism. The transfer mechanism includes a motor-driven transfer wheel. The feeding mechanism includes an inlet end for receiving graphite rods and a delivery fixing end for feeding the graphite rods to the automatic grinding mechanism. The delivery fixing end includes an openable and closable delivery fixing lip. The automatic grinding mechanism includes a worktable that can move closer to or further away from the delivery fixing end. The worktable is equipped with a rod-turning device that can reciprocate horizontally in the left-right direction of the delivery fixing lip. The rod-turning device includes a positioning arm and a grinding arm. The grinding arm has a rod-receiving mechanism on the side away from the positioning arm. The rod-receiving mechanism includes a receiving part and a collecting part. This invention has a high degree of automation and can mechanically pick up the graphite rods.

Description

Technical Field

[0001] This invention relates to the field of graphite threaded rod preparation equipment, specifically to a CNC machine tool for preparing high-precision graphite screws. Background Technology

[0002] Graphite boats are components used in the photovoltaic industry, specifically within polycrystalline silicon ingot casting furnaces, and are crucial elements in semiconductor manufacturing. The processing of graphite boat sheets first requires cutting graphite blocks into graphite slices. Then, grooves are engraved on the surface of these slices. Graphite spacers are then manually installed into the spacer holes of the graphite slices. Multiple graphite boat sheets are connected using graphite threaded rods to form the final graphite boat. Current processes require at least a graphite screw lathe, which necessitates manual loading and unloading. Due to the grinding and grooving processes involving cutting tools, workers are prone to accidents during material handling. To reduce personal safety during production, we need a highly automated CNC machine tool capable of mechanically handling the graphite rods. Summary of the Invention

[0003] This invention provides a CNC machine tool for manufacturing high-precision graphite screws, which is highly automated and capable of mechanically picking up the screw.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a CNC machine tool for preparing high-precision graphite screws, comprising a transfer mechanism, a feeding mechanism, and an automatic grinding mechanism. The transfer mechanism includes a transfer wheel driven by a motor. The feeding mechanism includes an inlet end for receiving graphite rods and an outlet fixed end for feeding graphite rods to the automatic grinding mechanism. The outlet fixed end includes an outlet fixed lip that can open and close. The automatic grinding mechanism includes a worktable that can move closer to or further away from the outlet fixed end. The worktable is provided with a rod-turning device that can reciprocate in the horizontal left and right direction of the outlet fixed lip. The rod-turning device includes a positioning arm and a grinding arm. The grinding arm is provided with a rod-receiving mechanism on the side away from the positioning arm. The rod-receiving mechanism includes a rod-receiving part and a collecting part.

[0005] Preferably, the collecting part includes a plate axially connected to the receiving part, and the plate moves in a circular motion around the connecting shaft as the wheel rod device moves.

[0006] Preferably, the lower end of the plate is connected to the worktable via a shaft connecting rod, the upper end of the shaft connecting rod is shaft-connected to the plate, and the lower end of the shaft connecting rod is shaft-connected to the worktable.

[0007] Preferably, the receiving part has an inclined protrusion near the plate, and when the plate is in the falling collecting state, the end of the plate is connected to the inclined protrusion.

[0008] Preferably, the collecting unit further includes a rod collecting box located away from the plate. The rod collecting box includes a rod collecting drawer, and a rod dropping plate is provided on the rod collecting drawer. The rod dropping plate is inclined, and the upper end of the rod dropping plate contacts a buffer rotating bending plate. The buffer rotating bending plate is axially connected to the inner wall of the rod collecting box.

[0009] Preferably, the rod collecting box is equipped with a proximity switch. When the buffer rotating bending plate moves counterclockwise upward around the axis and the closest distance from the lowest end of the buffer rotating bending plate to the falling rod plate is equal to the diameter of the graphite rod, the buffer rotating bending plate collides with the proximity switch.

[0010] Preferably, the two side walls of the rod drawer are symmetrically provided with guide grooves, which are respectively inserted into the two ends of the movable baffle. The back of the movable baffle is provided with a magnet, and the back plate of the rod drawer is provided with a Hall switch corresponding to the magnet.

[0011] Preferably, the inner wall of the collector drawer is provided with a shock-absorbing layer.

[0012] Preferably, the positioning arm is detachably connected to a positioning plate by bolts, and the end of the positioning plate is provided with an inclined chamfered cutter head.

[0013] In summary, the present invention has the following beneficial effects.

[0014] 1. The motor-driven transfer wheel enables automatic feeding, reducing manual intervention and ensuring damage-free feeding.

[0015] 2. The design incorporates a receiving section and a collecting section to achieve automated bar collection, significantly reducing the number of times workers need to manually retrieve bars and improving operational safety.

[0016] 3. When the buffer rotating bending plate collides with the first proximity switch, the proximity switch is triggered. After the proximity switch is triggered, the worktable is controlled to move back to the positioning arm. That is, after collecting a processed graphite rod, it continues to return to the positioning position. When in the positioning position, the positioning plate 25 on the positioning arm automatically positions the graphite plate that passes through the delivery fixing ring lip, realizing automatic and precise positioning in accordance with the working rhythm. After the positioning is completed, the delivery fixing ring lip fixes the graphite rod.

[0017] 4. Once full, the moving baffle contacts the back panel of the graphite rod drawer, triggering the Hall effect switch and activating the alarm circuit. An alarm is then triggered via a buzzer or indicator light to prompt the worker to remove the full graphite rod drawer. After removing all the graphite rods, the drawer is filled again for further collection. This structural design automates the rod collection process, allowing workers to retrieve the rods as soon as the drawer is full, significantly reducing the number of manual rod removals and improving operational safety. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of a CNC machine tool used to manufacture high-precision graphite screws.

[0020] Figure 2 This is a three-dimensional structural diagram of a CNC machine tool used to manufacture high-precision graphite screws from another angle.

[0021] Figure 3 This is a rear view of a CNC machine tool used to manufacture high-precision graphite screws.

[0022] Figure 4 This is a top view of a CNC machine tool used to manufacture high-precision graphite screws.

[0023] Figure 5 for Figure 4 Cross-sectional view of AA in its positioning state.

[0024] Figure 6 for Figure 4 Cross-sectional view of AA in the drop bar state.

[0025] Figure 7 for Figure 5 A magnified view of the details at point B in the middle.

[0026] Figure 8 This is a schematic diagram of the graphite rods falling into the collecting box.

[0027] Figure 9 for Figure 3 A magnified view of the details at point C.

[0028] In the diagram: 1. Transfer mechanism, 2. Feeding mechanism, 3. Automatic grinding mechanism, 4. Motor, 5. Transfer wheel, 6. Feeding end, 7. Feeding fixed end, 8. Feeding fixed ring lip, 9. Worktable, 10. Positioning arm, 11. Grinding arm, 12. Receiving bar mechanism, 13. Bar collecting drawer, 14. Bar turning device, 15. Receiving part, 16. Plate, 17. Connecting shaft, 18. Shaft connecting rod, 19. Inclined protrusion, 20. Connecting piece, 21. Bar collecting box, 22. Bar dropping plate, 23. Buffer rotating bending plate, 24. First proximity switch, 25. Guide groove, 26. Moving baffle, 27. Positioning plate, 28. Turning tool, 29. Chamfering cutter head. Detailed Implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] Example 1

[0031] like Figures 1 to 9 As shown, a CNC machine tool for preparing high-precision graphite screws includes a transfer mechanism 1, a feeding mechanism 2, and an automatic grinding mechanism 3. The transfer mechanism 1 includes a transfer wheel 5 driven by a motor 4. The feeding mechanism 2 includes an inlet end 6 for receiving graphite rods and an outlet fixed end 7 for feeding graphite rods to the automatic grinding mechanism 3. A transfer channel is provided between the inlet end 6 and the outlet fixed end 7. The graphite rod enters from the inlet end 6, passes through the transfer channel, and exits from the outlet fixed end 7. The outlet fixed end 7 includes an outlet fixed lip 8 that can be opened and closed. The automatic grinding mechanism 3 includes a worktable 9 that can move closer to or further away from the outlet fixed end 7. The worktable 9 is provided with a turning device 14 that can reciprocate in the horizontal left and right directions of the outlet fixed lip 8. The turning device 14 includes a positioning arm 10 and a grinding arm 11. A turning tool 28 is fixed to the grinding arm 11 by bolts. When turning the threads on the graphite rod, it needs to be turned multiple times. The grinding arm 11 has a receiving mechanism 12 on the side away from the positioning arm 10. The receiving mechanism 12 is used to receive the graphite rods after the trough is completed and to pass the completed graphite rods into the collecting drawer 13. The receiving mechanism 12 includes a receiving part 15 and a collecting part.

[0032] The positioning arm 10 is detachably connected to a positioning plate 27 by bolts. The end of the positioning plate 27 is provided with an inclined chamfering head 29, which is used to chamfer the end of the graphite rod.

[0033] The movement of the worktable 9 is controlled by existing mechanical drive, which can be either a pneumatic cylinder or a hydraulic cylinder. The movement of the control bar device 14 back and forth on the worktable 9 is also existing technology, and can be either a pneumatic cylinder, a hydraulic cylinder, or a linear motor.

[0034] The collecting section includes a plate 16 that is axially connected to the receiving section 15. The plate 16 moves in a circular motion around the connecting shaft 17, following the movement of the graphite rod turning device 14. The graphite rods on the plate 16 fall down as the plate 16 rotates clockwise downwards, and finally enter the collecting drawer 13. The inner wall of the collecting drawer 13 is provided with a shock-absorbing layer. Since the graphite rods need to move back and forth during the turning process, it will inevitably affect the graphite rods that have been processed in the collecting drawer 13. The addition of the shock-absorbing layer protects the graphite rods. The shock-absorbing layer can be made of silicone or sponge.

[0035] The lower end of plate 16 is connected to worktable 9 via shaft connecting rod 18. The upper end of shaft connecting rod 18 is shaft connected to plate 16, and the lower end of shaft connecting rod 18 is shaft connected to worktable 9.

[0036] The receiving part 15 has an inclined protrusion 19 near the plate 16. When the plate 16 is in the falling collecting state, the end of the plate 16 is connected to the inclined protrusion 19. The presence of the inclined protrusion 19 allows the plate 16 to smoothly reciprocate around the connecting shaft 17. The plate 16 is connected to the connecting shaft 17 through connecting pieces 20 provided at both ends of the receiving part 15.

[0037] The collection section also includes a rod collecting box 21 located away from the plate 16. The rod collecting box 21 includes a rod collecting drawer 13. A rod dropping plate 22 is provided on the rod collecting drawer 13. The rod dropping plate 22 is inclined and its upper end contacts a buffer rotating bending plate 23. The buffer rotating bending plate 23 is axially connected to the inner wall of the rod collecting box 21.

[0038] The collecting rod box 21 is equipped with a first proximity switch 24. When the buffer rotating bending plate 23 moves counterclockwise upward around the axis and the closest distance from the lowest end of the buffer rotating bending plate 23 to the dropping plate 22 is equal to the diameter of the graphite rod, the buffer rotating bending plate 23 collides with the first proximity switch 24. When the buffer rotating bending plate 23 collides with the first proximity switch 24, the first proximity switch 24 is triggered. After the first proximity switch 24 is triggered, it controls the worktable 9 to move back to the positioning arm 10, that is, after collecting a processed graphite rod, it continues to return to the positioning position. When in the positioning position, the positioning plate 27 on the positioning arm 10 automatically positions the graphite plate that passes through the delivery fixing ring lip 8. After the positioning is completed, the delivery fixing ring lip 8 fixes the graphite rod.

[0039] The graphite rod collecting drawer 13 has symmetrical guide grooves 25 on both sides, which are respectively inserted into the two ends of the movable baffle 26. A magnet is located on the back of the movable baffle 26, and a Hall switch is located on the back of the drawing drawer 13 corresponding to the magnet. When the graphite rod collecting drawer 13 is full, the movable baffle 26 moves towards the back of the drawing drawer 13 due to the influence of the graphite rods. When full, the movable baffle 26 contacts the back of the drawing drawer 13, the magnet activates the Hall switch, and the alarm circuit is connected. An alarm is triggered by a buzzer or indicator light to prompt the worker to remove the full graphite rod collecting drawer 13. After removing all the graphite rods, the drawing drawer is filled again for collecting. This structural design allows for automated rod collecting, with the worker retrieving the rods only when the drawer is full, greatly reducing the number of times workers need to manually retrieve the rods and improving operational safety.

[0040] In the description of this invention, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0041] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0042] 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. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A CNC machine tool for manufacturing high-precision graphite screws, comprising a transfer mechanism (1), a feeding mechanism (2), and an automatic grinding mechanism (3), characterized in that, The transfer mechanism (1) includes a transfer wheel (5) driven by a motor (4). The feeding mechanism (2) includes an inlet end (6) for receiving graphite rods and an outlet fixed end (7) for sending graphite rods to the automatic grinding mechanism (3). The outlet fixed end (7) includes an outlet fixed lip (8) that can be opened and closed. The automatic grinding mechanism (3) includes a worktable (9) that can move closer to or further away from the outlet fixed end (7). The worktable (9) is provided with a rod-carrying device (14) that can reciprocate in the horizontal left and right directions of the outlet fixed lip (8). The rod-carrying device (14) includes a positioning arm (10) and a grinding arm (11). The grinding arm (11) is provided with a rod-receiving mechanism (12) on the side away from the positioning arm (10). The rod-receiving mechanism (12) includes a rod-receiving part (15) and a collecting part. The collecting part includes a plate (16) axially connected to the receiving part (15), and the plate (16) moves in a circular motion around the connecting shaft (17) following the movement of the wheel rod device (14); The lower end of the plate (16) is connected to the worktable (9) via a shaft connecting rod (18), the upper end of the shaft connecting rod (18) is shaft-connected to the plate (16), and the lower end of the shaft connecting rod (18) is shaft-connected to the worktable (9). The receiving part (15) is provided with an inclined protrusion (19) near the plate (16). When the plate (16) is in the state of falling and collecting rods, the end of the plate (16) is connected to the inclined protrusion (19). The collecting section also includes a rod collecting box (21) located away from the plate (16). The rod collecting box (21) includes a rod collecting drawer (13). The rod collecting drawer (13) is provided with a rod dropping plate (22). The rod dropping plate (22) is inclined. The upper end of the rod dropping plate (22) is in contact with a buffer rotating bending plate (23). The buffer rotating bending plate (23) is axially connected to the inner wall of the rod collecting box (21). The rod collecting box (21) is provided with a first proximity switch (24). When the buffer rotating bending plate (23) moves counterclockwise upward around the axis and the shortest distance from the lowest end of the buffer rotating bending plate (23) to the falling rod plate (22) is equal to the diameter of the graphite rod, the buffer rotating bending plate (23) collides with the first proximity switch (24). The two sides of the rod drawer (13) are symmetrically provided with guide grooves (25), which are respectively inserted into the two ends of the movable baffle (26). The back of the movable baffle (26) is provided with a magnet, and the back of the rod drawer (13) is provided with a Hall switch corresponding to the magnet. The positioning arm (10) is detachably connected to a positioning plate (27) by bolts, and the end of the positioning plate (27) is provided with an inclined chamfering head (29). When the buffer rotating bending plate (23) collides with the first proximity switch (24), the first proximity switch (24) is triggered. After the first proximity switch (24) is triggered, the worktable (9) is controlled to move back to the positioning arm (10) to return to its original position. That is, after collecting a processed graphite rod, it continues to return to the positioning position. When in the positioning position, the positioning plate (27) on the positioning arm (10) automatically positions the graphite plate that passes through the delivery fixing ring lip (8).

2. The CNC machine tool for manufacturing high-precision graphite screws according to claim 1, characterized in that, The inner wall of the collection drawer (13) is provided with a shock-absorbing layer.

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