A feeding device and method for CNC machine tools used in metal processing

Abstract

This invention relates to the field of machine tool feeding devices, specifically a feeding device and method for CNC machine tools used in metal processing. The device includes a base, a worktable fixedly mounted on the base, symmetrically arranged power blocks fixedly mounted on the worktable, a limiting and pressing block slidably mounted on the worktable, a clamping block rotatably mounted on the top of the base, and a feed adjustment device slidably mounted on the worktable. The invention connects a first screw and a second screw inside the feed adjustment device to a clutch. When the workpiece rotates in the reverse direction at the end of the feed process, the clutch contacts the second and first power blocks through friction, reducing errors caused by backlash in the threaded rods during rotation and improving the stability of workpiece processing. The limiting block can lock the clutch during the movement of the connecting part, preventing the clutch from rotating during movement.

Description

Technical Field

[0001] This invention belongs to the field of machine tool feeding devices, specifically a CNC machine tool feeding device and method for metal processing. Background Technology

[0002] A CNC machine tool is a highly efficient automated device that controls the machining process through digital program instructions. It replaces manual operation and can precisely manufacture complex parts. The key to achieving precise relative motion between the tool and the workpiece lies in its feed mechanism, the core component that executes the motion commands of the CNC system, acting like the "hands and feet" of the machine tool. It typically consists of a servo motor, ball screw, and guide rails, converting electrical pulse signals into precise and stable linear displacement. The high precision and stability of the feed mechanism directly determine the machining quality, efficiency, and reliability of the CNC machine tool. The organic combination of these two components forms the technological foundation of modern precision manufacturing.

[0003] A patent application with publication number CN120901748B discloses a feed device for CNC machine tool machining, including a machine bed. A feed mechanism is installed inside the machine bed. The feed mechanism includes a servo motor fixedly connected to one end of the machine bed, a coupling fixedly connected coaxially to the output shaft of the servo motor, and a lead screw fixedly connected to one end of the coupling. A guide rod is provided on the same horizontal side of the lead screw. A feed base is movably connected to the top of the lead screw and the guide rod. The feed base includes a saddle for supporting moving parts and base support assemblies at both ends of the saddle. By providing base support assemblies, during the movement of the saddle, oil will continuously leak naturally from the oil distributor into the interior of the first and second sliding sleeves to lubricate and dissipate heat from the contact surfaces of the two sleeves with the lead screw and guide rod. This timely lubrication and cooling of the increased friction and heat generated after the lead screw nut is pre-tightened is beneficial for improving equipment operating efficiency and extending equipment service life.

[0004] During use, the aforementioned device can improve the service life of the feed screw by cooling it down. However, with prolonged use and wear, the thread clearance on the outside of the screw will increase. Even if the screw is cooled down, the feed device will still experience increased errors during machining due to the gaps between the screws. The error is greatest when a single screw reverses, which can easily lead to increased workpiece machining errors. Summary of the Invention

[0005] This invention provides a feeding device and method for CNC machine tools used in metal processing, which solves the technical problem that in related technologies, when the lead screw is used for a long time and wears out, the external thread clearance of the lead screw will increase. Even if the lead screw is cooled, the feed device will still have increased errors during machine processing due to the gap between the lead screws. Moreover, the error of a single lead screw is the largest when it is reversed, which easily leads to increased workpiece processing errors.

[0006] The first aspect of this invention discloses a feeding device for a CNC machine tool used in metal processing, comprising a base, a worktable fixedly mounted on the base, symmetrically arranged power blocks fixedly mounted on the worktable, a limiting and pressing block slidably mounted on the worktable, a clamping block rotatably mounted on the top of the base, a feed adjustment device slidably mounted on the worktable, the feed adjustment device being mounted on the power blocks, and a cutting tool placed on the feed adjustment device. The cutting tool on the feed adjustment device feeds the workpiece when the clamping block rotates the workpiece. The feed adjustment device includes a first screw, a second screw, a feed box, a first power component, a second power component, a clutch component, a connecting component, and a limiting component. The two power blocks are connected... A first screw and a second screw, symmetrically arranged, are rotatably mounted on their adjacent sides. A feed box is located outside the first screw and the second screw. A first power component is threaded onto the external thread of the first screw, and a second power component is threaded onto the external thread of the second screw. A connecting component is rotatably mounted inside the feed box. A clutch component is located at the lower part of the second power component and is connected to the connecting component. A limit component is located inside the feed box below the clutch component. When the connecting component is pulled to adjust the clutch component to engage with the second power component and the first power component respectively, reverse thread clearance between the first power component and the second power component and the first screw and the second screw is prevented.

[0007] As a further optimization of the present invention, the first power component includes a first fixing block fixedly installed inside the feed box, the first fixing block sliding outside the first screw, a first gear rotatably mounted on the side of the first fixing block, the first gear being threadedly installed with the first screw, a second gear rotatably mounted on the side of the first fixing block, the second gear meshing with the first gear, and a third gear rotatably mounted on the side of the first fixing block, the third gear meshing with the second gear.

[0008] As a further optimization of the present invention, the second power component includes a second fixed block slidably installed inside the feed box, a fourth gear rotatably installed on the side of the second fixed block, a fifth gear rotatably installed on the side of the second fixed block near the first fixed block, the fifth gear meshing with the fourth gear, a sixth gear rotatably installed on the side of the second fixed block, the sixth gear meshing with the fifth gear, and the second fixed block and the first fixed block being symmetrically arranged about the feed box.

[0009] As a further optimization of the present invention, the connecting member includes a connecting rotating rod rotatably installed inside the feed box, the end of the connecting rotating rod being connected to the clutch, a rotating disk being fixedly installed on the end of the connecting rotating rod away from the clutch, and a rotating handle being fixedly installed on the side of the rotating disk.

[0010] As a further optimization of the present invention, the clutch includes a motor connecting rod rotatably mounted at the end of a connecting rotating rod. A slip ring is fixedly mounted on the outside of the motor connecting rod. A compression ring is slidably mounted on the outside of the center of the slip ring. A limiter is fixedly mounted on the bottom of the compression ring. A first rotating block and a third compression block are rotatably mounted on the lower part of the compression ring. The first rotating block and the third compression block are symmetrically rotated. A second compression block is fixedly mounted on the upper part of the first rotating block. A first compression block is fixedly mounted on the upper part of the third compression block. A groove is opened in the center of the compression ring so that when the first compression block and the second compression block approach each other, they clamp the outside of the slip ring. A plurality of first U-shaped blocks are arranged in a circular array on the outer circumference of the slip ring. A compression friction rod is rotatably mounted inside the first U-shaped block. The first U-shaped blocks and the compression friction rod are symmetrically mounted on the outside of the slip ring. A friction connection module that contacts the third gear and the sixth gear is provided on the outside of the slip ring.

[0011] As a further optimization of the present invention, the friction connection module includes a first extrusion plate slidably mounted on a circumferential array arranged outside the slip ring, the first extrusion plate penetrating the outer edge of the slip ring, a second extrusion plate fixedly mounted at the end of the slip ring, a first compression spring disposed on the outside of the first extrusion plate near the extrusion ring, and a second compression spring disposed on the outside of the first extrusion plate near the second extrusion plate.

[0012] As a further optimization of the present invention, the limiting component includes a limiting connecting plate fixedly installed at the bottom of the extrusion ring, a sliding groove is provided inside the feed box, and limiting slide bars are fixedly installed at both ends of the upper part of the sliding groove. A third screw is threadedly connected inside the limiting connecting plate, and the third screw is installed in the sliding groove inside the feed box.

[0013] As a further optimization of the present invention, a motor is provided inside the second fixing block, and the motor is connected to the motor connecting rod. The rotation of the motor connecting rod is used to drive the slip ring to rotate.

[0014] As a further optimization of the present invention, a torsion spring is provided at the connection position between the first U-shaped block and the extrusion friction rod, so that the end of the extrusion friction rod is tilted away from the center of the slip ring.

[0015] The second aspect of this invention discloses a feeding method for a CNC machine tool used in metal processing, comprising the following steps: Step 1: Place the workpiece on the clamping block for clamping, move the limiting extrusion block so that the limiting extrusion block extrudes and limits the workpiece, and complete the extrusion and limiting workpiece. Then install the tool on the top of the feed box to complete the limiting work of the tool. Step 2: Start the motor inside the second fixed block to drive the clutch to rotate. The clutch engages with the first power component through the extension and retraction of the connecting piece, which drives the first screw to rotate, thereby moving the feed box. The movement of the feed box moves the tool on the top of the feed box, thereby processing the workpiece. Step 3: When the feed box moves to the end of the workpiece processing, the multiple gears on the second power component rotate passively, so there is no backlash. At this time, the motor inside the second fixed block is turned off, and the rotating disk is rotated, causing the rotating disk to move away from the center of the feed box. This drives the clutch to move closer to the fifth gear. The limiting component inside the feed box is used to limit the clutch to prevent the clutch from rotating during the movement until the clutch is fully in contact with the sixth gear. Then the limiting component no longer limits the clutch. The motor inside the second fixed block is started, driving the clutch to rotate. The rotation of the clutch drives the sixth gear to rotate, driving the feed box to move and perform reverse feed operation.

[0016] The beneficial effects of this invention are as follows: The present invention discloses a feeding device and method for CNC machine tools used in metal processing. The first and second screws inside the feeding adjustment device are connected to a clutch. When the workpiece rotates in the reverse direction at the end of the feeding process, the clutch contacts the second and first power components through friction, reducing the error caused by the reverse clearance of the threaded rod during rotation and improving the stability of workpiece processing. The limiting component can lock the clutch during the movement of the connecting component and the sliding of the clutch, preventing the clutch from rotating during the movement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall shape of the device of the present invention; Figure 2 This is a schematic diagram of the overall device installation of the present invention; Figure 3 This is a schematic diagram of the internal structure of the feed adjustment device of the present invention; Figure 4 This is a schematic diagram of the feed adjustment device transmission of the present invention; Figure 5 This is a schematic diagram of the internal structure of the second power component of the present invention; Figure 6 This is a schematic diagram of the internal structure connection of the limiting component of the present invention; Figure 7 This is a schematic diagram of the internal structure of the clutch component of the present invention.

[0018] In the picture: 1. Base; 11. Worktable; 12. Clamping block; 13. Limiting and pressing block; 14. Power block; 2. Feed adjustment device; 21. First screw; 22. Second screw; 23. Feed box; 24. First power component; 241. First fixing block; 242. First gear; 243. Second gear; 244. Third gear; 25. Second power component; 251. Second fixing block; 252. Fourth gear; 253. Fifth gear; 254. Sixth gear; 26. Clutch; 261. Slip ring; 2611. Motor connecting rod; 262. Extrusion ring; 263. First extrusion block; 264. 265. First rotating block; 266. Second extrusion block; 267. Third extrusion block; 268. First U-shaped block; 269. Extrusion friction rod; 260. Friction connection module; 2691. First extrusion plate; 2692. First extrusion spring; 2693. Second extrusion spring; 2694. Second extrusion plate; 27. Connector; 271. Rotary disk; 272. Rotary handle; 273. Connecting rotating rod; 28. Limiting component; 281. Limiting slide bar; 282. Third screw; 283. Limiting connecting plate. Detailed Implementation

[0019] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0020] like Figures 1 to 3 As shown in the embodiment of the present invention, a CNC machine tool feed device for metal processing includes a base 1, a worktable 11 fixedly mounted on the base 1, symmetrically arranged power blocks 14 fixedly mounted on the worktable 11, a limit pressing block 13 slidably mounted on the worktable 11, a clamping block 12 rotatably mounted on the top of the base 1, a feed adjustment device 2 slidably mounted on the worktable 11, the feed adjustment device 2 is mounted on the power blocks 14, a cutting tool is placed on the feed adjustment device 2, and the cutting tool on the feed adjustment device 2 feeds and processes the workpiece when the clamping block 12 drives the workpiece to rotate. like Figures 4 to 5As shown, the feed adjustment device 2 includes a first screw 21, a second screw 22, a feed box 23, a first power component 24, a second power component 25, a clutch component 26, a connecting component 27, and a limiting component 28. The first screw 21 and the second screw 22 are symmetrically mounted on the sides of the two power blocks 14 that are close to each other. The feed box 23 is located outside the first screw 21 and the second screw 22. The first power component 24 is threaded onto the external thread of the first screw 21, and the second power component 25 is threaded onto the external thread of the second screw 22. 5. A connecting member 27 is rotatably mounted inside the feed box 23. A clutch 26 is provided at the lower part of the second power component 25. The clutch 26 is connected to the connecting member 27. A limit member 28 is provided inside the feed box 23 located at the lower part of the clutch 26. When the connecting member 27 is pulled to adjust the clutch 26 to engage with the second power component 25 and the first power component 24 respectively, reverse thread clearance between the first power component 24 and the second power component 25 and the first screw 21 and the second screw 22 is prevented.

[0021] It should be noted that the workpiece is placed on the clamping block 12 for clamping, and the limiting extrusion block 13 is moved so that the limiting extrusion block 13 extrudes and limits the workpiece, completing the extrusion and limiting workpiece. Then, the tool is installed on the top of the feed box 23, completing the tool installation. The motor inside the second fixing block 251 is started to drive the clutch 26 to rotate. Through the extension and retraction of the connecting piece 27, the clutch 26 engages with the first power component 24, which can drive the first screw 21 to rotate, thereby achieving the purpose of moving the feed box 23. The movement of the feed box 23 can move the tool on top of the feed box 23, completing the feeding and machining of the workpiece. When the feed box 23 moves to the end of the workpiece machining, if the first screw 21 is a single screw, there will be a backlash in the first screw 21 when it moves in the opposite direction. Therefore, it will cause errors in the workpiece during machining. However, a clutch 26 is provided to connect to the first power component 24 and the second power component 25 respectively. When the clutch 26 is connected to the first power component 24, the multiple gears on the second power component 25 will rotate passively and there will be no backlash. At this time, the second power component 25 will be closed. The motor is then adjusted, and the connecting piece 27 is adjusted to move the clutch 26, causing the clutch 26 to move closer to the second power component 25. The limiting piece 28 inside the feed box 23 limits the clutch 26 to prevent it from rotating during movement. This continues until the clutch 26 is fully in contact with the second power component 25. At this point, the limiting piece 28 no longer limits the clutch 26, and the motor inside the second power component 25 is started, causing the clutch 26 to rotate. The rotation of the clutch 26 then drives the second power component 25 to rotate, thus driving... The feed box 23 moves to perform reverse feed. This device is connected to the clutch 26 through the first screw 21 and the second screw 22 inside the feed adjustment device 2. When the workpiece rotates in the reverse direction at the end of the feed process, the clutch 26 contacts the second power component 25 and the first power component 24 through friction, reducing the error caused by the reverse clearance of the threaded rod during the rotation process and improving the stability of the workpiece processing. The limiting component 28 can lock the clutch 26 during the sliding process of the connecting component 27, preventing the clutch 26 from rotating during the movement.

[0022] like Figures 3 to 4As shown, the first power component 24 includes a first fixing block 241 fixedly installed inside the feed box 23. The first fixing block 241 slides outside the first screw 21. A first gear 242 is rotatably installed on the side of the first fixing block 241. The first gear 242 is threadedly installed on the first screw 21. A second gear 243 is rotatably installed on the side of the first fixing block 241. The second gear 243 meshes with the first gear 242. A third gear 244 is rotatably installed on the side of the first fixing block 241. The third gear 244 meshes with the second gear 243.

[0023] It should be noted that when the third gear 244 rotates, it can drive the second gear 243 and the first gear 242 to rotate. The first gear 242 is internally threaded to the first screw 21, so that the feed box 23 can slide on the top of the worktable 11, thereby achieving the purpose of feeding.

[0024] like Figures 3 to 4 As shown, the second power component 25 includes a second fixing block 251 slidably mounted inside the feed box 23. A fourth gear 252 is rotatably mounted on the side of the second fixing block 251. A fifth gear 253 is rotatably mounted on the side of the second fixing block 251 near the first fixing block 241. The fifth gear 253 meshes with the fourth gear 252. A sixth gear 254 is rotatably mounted on the side of the second fixing block 251. The sixth gear 254 meshes with the fifth gear 253. The second fixing block 251 and the first fixing block 241 are symmetrically arranged about the feed box 23.

[0025] It should be noted that when the clutch 26 contacts the first power component 24, it can drive the feed box 23 to move. During the movement of the feed box 23, it can drive the fourth gear 252 to rotate. When the fourth gear 252 rotates, it drives the fifth gear 253 and the sixth gear 254 to rotate. Therefore, when the feed box 23 moves in the opposite direction, it needs to drive the sixth gear 254 to rotate in the opposite direction. However, the sixth gear 254 is in the process of passive rotation, which has eliminated the backlash between the sixth gear 254, the fifth gear 253, and the fourth gear 252. Therefore, when the clutch 26 and the sixth gear 254 contact each other through friction, no backlash will be generated, thereby improving the accuracy of workpiece machining.

[0026] like Figure 4 As shown, the connector 27 includes a connecting rotating rod 273 rotatably installed inside the feed box 23. The end of the connecting rotating rod 273 is connected to the clutch 26. A rotating disk 271 is fixedly installed on the end of the connecting rotating rod 273 on the side away from the clutch 26. A rotating handle 272 is fixedly installed on the side of the rotating disk 271.

[0027] It should be noted that when it is necessary to adjust whether the clutch 26 is engaged with the first power component 24 or the second power component 25, the rotary handle 272 can be rotated. The rotation of the rotary handle 272 drives the rotary disk 271 to rotate. The connecting rotary rod 273 is threadedly connected to the feed box 23, so it can drive the clutch 26 to move, thereby achieving the purpose of driving the clutch 26 to contact and connect with the second power component 25 or the first power component 24.

[0028] like Figures 5 to 7 As shown, the clutch 26 includes a motor connecting rod 2611 rotatably mounted at the end of the connecting rotating rod 273. A slip ring 261 is fixedly mounted on the outside of the motor connecting rod 2611. A compression ring 262 is slidably mounted on the outside of the center of the slip ring 261. A limiter 28 is fixedly mounted on the bottom of the compression ring 262. A first rotating block 264 and a third compression block 266 are rotatably mounted on the lower part of the compression ring 262. The first rotating block 264 and the third compression block 266 are rotationally symmetrical. A second compression block 265 is fixedly mounted on the upper part of the first rotating block 264. A first extrusion block 263 is fixedly installed on the upper part of block 266. A groove is opened in the center of the extrusion ring 262 so that when the first extrusion block 263 and the second extrusion block 265 approach each other, they clamp the outside of the slip ring 261. Multiple first U-shaped blocks 267 are arranged in a circular array on the outer circumference of the slip ring 261. An extrusion friction rod 268 is rotatably installed inside the first U-shaped block 267. The first U-shaped blocks 267 and the extrusion friction rod 268 are symmetrically installed on the outside of the slip ring 261. A friction connection module 269 is provided on the outside of the slip ring 261 to contact the third gear 244 and the sixth gear 254.

[0029] It should be noted that a motor is installed inside the sixth gear 254, and the output shaft of the motor is slidably mounted on the motor. The rotation of the motor can drive the slip ring 261 to rotate. Therefore, when the pressing friction rod 268 on the slip ring 261 contacts the side of the third gear 244 or the sixth gear 254, it can drive the third gear 244 or the sixth gear 254 to rotate. The slip ring 261 is also equipped with a friction connection module 269, which ensures that the third gear 244 and the sixth gear 254 are in complete contact to prevent slippage. Thus, when the slip ring 261 rotates, it can drive the third gear 244 and the sixth gear 254 to rotate, thereby driving the feed box 23 to move and achieve the purpose of feeding. The internal structure of the feed box 23 is limited. When the position of the slip ring 261 moves, the positioning element 28 can squeeze the first rotating block 264 and the third squeezing block 266, thereby causing the first squeezing block 263 and the second squeezing block 265 to clamp the outside of the slip ring 261, preventing the slip ring 261 from rotating during its movement and reducing rotational errors caused by gaps between workpieces. The bottom of the squeezing ring 262 is provided with a limiting element 28, which can rotate to drive the squeezing ring 262 to contact the friction connection module 269, thereby allowing the friction connection module 269 to fully extend and contact the sixth gear 254 and the third gear 244, driving the sixth gear 254 and the third gear 244 to rotate, and driving the feed box 23 to move.

[0030] like Figure 7 As shown, the friction connection module 269 includes a first extrusion plate 2691 slidably mounted on the outer circumferential array of the slip ring 261. The first extrusion plate 2691 penetrates the outer edge of the slip ring 261. A second extrusion plate 2694 is fixedly mounted on the end of the slip ring 261. A first compression spring 2692 is provided on the outside of the first extrusion plate 2691 near the extrusion ring 262, and a second compression spring 2693 is provided on the outside of the first extrusion plate 2691 near the second extrusion plate 2694.

[0031] It should be noted that multiple friction connection modules 269 are provided on both sides of the slip ring 261. The friction connection module 269 includes multiple sets of circumferential array of second extrusion plates 2694. Therefore, when the extrusion ring 262 extrudes the first extrusion plate 2691, it can drive the second extrusion plate 2694 to contact the sixth gear 254 and the third gear 244. Through frictional connection, the gap between the gears and the screw is eliminated, and the accuracy of the feeding device is improved.

[0032] like Figures 4 to 6As shown, the limiting member 28 includes a limiting connecting plate 283 fixedly installed at the bottom of the extrusion ring 262. The inside of the feed box 23 is provided with a sliding groove. Limiting slide strips 281 are fixedly installed at both ends of the upper part of the sliding groove. A third screw 282 is threadedly connected to the inside of the limiting connecting plate 283. The third screw 282 is installed in the sliding groove inside the feed box 23.

[0033] It should be noted that when the rotating disk 271 rotates and drives the connecting rotating rod 273 to rotate to a certain position, the motor can be started to drive the third screw 282 to rotate, so that the third screw 282 drives the limiting connecting plate 283 to rotate towards the nearest gear of the slip ring 261, thereby making the second extrusion plate 2694 fit more closely to the sixth gear 254 and the third gear 244, improving the stability of the device operation.

[0034] like Figures 4 to 7 As shown, a motor is installed inside the second fixing block 251. The motor is connected to the motor connecting rod 2611. The rotation of the motor connecting rod 2611 is used to drive the slip ring 261 to rotate.

[0035] It should be noted that a motor is installed inside the second fixing block 251. The motor is connected to the motor connecting rod 2611. The rotation of the motor connecting rod 2611 is used to drive the slip ring 261 to rotate. When the motor connected to the motor connecting rod 2611 is started, it can drive the motor connecting rod 2611 and the slip ring 261 to rotate, thereby driving the feed box 23 to move.

[0036] like Figure 7 As shown, a torsion spring is provided at the connection position between the first U-shaped block 267 and the extrusion friction rod 268, so that the end of the extrusion friction rod 268 is tilted away from the center of the slip ring 261.

[0037] It should be noted that a torsion spring is provided at the connection position between the first U-shaped block 267 and the extrusion friction rod 268, so that the end of the extrusion friction rod 268 is tilted away from the center of the slip ring 261, so that the end of the extrusion friction rod 268 first contacts the third gear 244 or the sixth gear 254. This prevents the slip ring 261 from automatically rotating when the first rotating block 264 and the third extrusion block 266 rotate and drive the first extrusion block 263 and the second extrusion block 265 to contact the slip ring 261 for clamping, thereby improving the stability of the device in contact and rotation.

[0038] A feeding method for a CNC machine tool used in metal processing, the method employing the aforementioned feeding device for a CNC machine tool used in metal processing, includes the following steps: Step 1: Place the workpiece on the clamping block 12 for clamping, move the limiting extrusion block 13 so that the limiting extrusion block 13 extrudes and limits the workpiece, and complete the extrusion and limiting workpiece. Then install the tool on the top of the feed box 23 to complete the limiting work of the tool. Step 2: Start the motor inside the second fixed block 251 to drive the clutch 26 to rotate. The clutch 26 engages with the first power component 24 through the extension and retraction of the connecting piece 27, which can drive the first screw 21 to rotate, thereby realizing the purpose of moving the feed box 23. The movement of the feed box 23 can drive the tool on the top of the feed box 23 to move, thereby processing the workpiece. Step 3: When the feed box 23 moves to the end of the workpiece processing, the multiple gears on the second power component 25 are passively rotated, so there is no backlash. At this time, the motor inside the second fixed block 251 is turned off, and the rotating disk 271 is rotated, which can make the rotating disk 271 move away from the center of the feed box 23, thereby driving the clutch 26 to move closer to the fifth gear 253. The limiting component 28 inside the feed box 23 is used to limit the clutch 26 to prevent the clutch 26 from rotating during the movement until the clutch 26 is fully in contact with the sixth gear 254. Then the limiting component 28 no longer limits the clutch 26. The motor inside the second fixed block 251 is started, which can drive the clutch 26 to rotate. The rotation of the clutch 26 drives the sixth gear 254 to rotate, which drives the feed box 23 to move and perform reverse feeding.

[0039] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of the embodiments described above, all of which are within the protection scope of the present invention.

Claims

1. A feed device for a CNC machine tool used in metal processing, comprising a base (1), characterized in that: A worktable (11) is fixedly installed on the base (1), and symmetrically arranged power blocks (14) are fixedly installed on the worktable (11). A limit pressing block (13) is slidably installed on the worktable (11). A clamping block (12) is rotatably installed on the top of the base (1). A feed adjustment device (2) is slidably installed on the worktable (11). The feed adjustment device (2) is installed on the power block (14). A cutting tool is placed on the feed adjustment device (2). When the clamping block (12) drives the workpiece to rotate, the cutting tool on the feed adjustment device (2) feeds and processes the workpiece. The feed adjustment device (2) includes a first screw (21), a second screw (22), a feed box (23), a first power component (24), a second power component (25), a clutch component (26), a connector (27), and a limiting component (28). The first screw (21) and the second screw (22) are symmetrically mounted on the side of the two power blocks (14) that are close to each other. A feed box (23) is provided outside the first screw (21) and the second screw (22). The first power component (24) is installed on the external thread of the first screw (21), and the second power component (25) is installed on the external thread of the second screw (22). The feed box (23) is rotatably mounted with a connector (27). The lower part of the second power component (25) is provided with a clutch (26). The clutch (26) is connected to the connector (27). The feed box (23) located below the clutch (26) is provided with a limiter (28). When the connector (27) is pulled to adjust the clutch (26) to engage with the second power component (25) and the first power component (24) respectively, it prevents the first power component (24) and the second power component (25) from having reverse thread clearance with the first screw (21) and the second screw (22).

2. The feeding device for a CNC machine tool in metal processing according to claim 1, characterized in that: The first power component (24) includes a first fixing block (241) fixedly installed inside the feed box (23). The first fixing block (241) slides outside the first screw (21). A first gear (242) is rotatably installed on the side of the first fixing block (241). The first gear (242) is threadedly installed on the first screw (21). A second gear (243) is rotatably installed on the side of the first fixing block (241). The second gear (243) meshes with the first gear (242). A third gear (244) is rotatably installed on the side of the first fixing block (241). The third gear (244) meshes with the second gear (243).

3. The feeding device for a CNC machine tool in metal processing according to claim 2, characterized in that: The second power component (25) includes a second fixed block (251) slidably mounted inside the feed box (23). A fourth gear (252) is rotatably mounted on the side of the second fixed block (251). A fifth gear (253) is rotatably mounted on the side of the second fixed block (251) near the first fixed block (241). The fifth gear (253) meshes with the fourth gear (252). A sixth gear (254) is rotatably mounted on the side of the second fixed block (251). The sixth gear (254) meshes with the fifth gear (253). The second fixed block (251) and the first fixed block (241) are symmetrically arranged about the feed box (23).

4. The feeding device for a CNC machine tool in metal processing according to claim 3, characterized in that: The connector (27) includes a connecting rotating rod (273) rotatably installed inside the feed box (23). The end of the connecting rotating rod (273) is connected to the clutch (26). A rotating disk (271) is fixedly installed on the end of the connecting rotating rod (273) away from the clutch (26). A rotating handle (272) is fixedly installed on the side of the rotating disk (271).

5. A CNC machine tool feed device for metal processing according to claim 4, characterized in that: The clutch (26) includes a motor connecting rod (2611) rotatably mounted on the end of a connecting rotating rod (273). A slip ring (261) is fixedly mounted on the outside of the motor connecting rod (2611). A compression ring (262) is slidably mounted on the outside of the center of the slip ring (261). A limiter (28) is fixedly mounted on the bottom of the compression ring (262). A first rotating block (264) and a third compression block (266) are rotatably mounted on the lower part of the compression ring (262). The first rotating block (264) and the third compression block (266) are symmetrical about their centers. A second compression block (265) is fixedly mounted on the upper part of the first rotating block (264). The third compression block (265) is rotatably mounted on the lower part of the first rotating block (264). A first extrusion block (263) is fixedly installed on the upper part of the extrusion ring (262). A groove is opened in the center of the extrusion ring (262) so that when the first extrusion block (263) and the second extrusion block (265) approach each other, they clamp the outside of the slip ring (261). The outer circumference of the slip ring (261) has a plurality of first U-shaped blocks (267). An extrusion friction rod (268) is rotatably installed inside the first U-shaped block (267). The first U-shaped block (267) and the extrusion friction rod (268) are symmetrically installed on the outside of the slip ring (261). The outside of the slip ring (261) is provided with a friction connection module (269) that contacts the third gear (244) and the sixth gear (254).

6. The feeding device for a CNC machine tool in metal processing according to claim 5, characterized in that: The friction connection module (269) includes a first extrusion plate (2691) slidably mounted on a circumferential array arranged outside the slip ring (261). The first extrusion plate (2691) passes through the outer edge of the slip ring (261). A second extrusion plate (2694) is fixedly mounted on the end of the slip ring (261). A first compression spring (2692) is arranged on the outside of the first extrusion plate (2691) near the extrusion ring (262). A second compression spring (2693) is arranged on the outside of the first extrusion plate (2691) near the side of the second extrusion plate (2694).

7. A CNC machine tool feed device for metal processing according to claim 6, characterized in that: The limiting component (28) includes a limiting connecting plate (283) fixedly installed at the bottom of the extrusion ring (262). The feed box (23) has a sliding groove inside. Limiting slide strips (281) are fixedly installed at both ends of the upper part of the sliding groove. A third screw (282) is threadedly connected inside the limiting connecting plate (283). The third screw (282) is installed in the sliding groove inside the feed box (23).

8. A CNC machine tool feed device for metal processing according to claim 7, characterized in that: The second fixing block (251) is equipped with a motor, which is connected to the motor connecting rod (2611). The rotation of the motor connecting rod (2611) is used to drive the slip ring (261) to rotate.

9. A CNC machine tool feed device for metal processing according to claim 8, characterized in that: A torsion spring is provided at the connection position between the first U-shaped block (267) and the extrusion friction rod (268), so that the end of the extrusion friction rod (268) is inclined away from the center of the slip ring (261).

10. A feeding method for a CNC machine tool feed device for metal processing as described in claim 9, characterized in that: Includes the following steps: Step 1: Place the workpiece on the clamping block (12) for clamping, move the limiting extrusion block (13) so that the limiting extrusion block (13) extrudes and limits the workpiece, and complete the extrusion and limiting work of the workpiece. Then install the tool on the top of the feed box (23) to complete the limiting work of the tool. Step 2: Start the motor inside the second fixed block (251) to drive the clutch (26) to rotate. Through the extension and retraction of the connecting piece (27), the clutch (26) engages with the first power piece (24), which drives the first screw (21) to rotate, thereby achieving the purpose of moving the feed box (23). The movement of the feed box (23) drives the tool on the top of the feed box (23) to move, thereby processing the workpiece. Step 3: When the feed box (23) moves to the end of the workpiece processing, the multiple gears on the second power component (25) are passively rotated, so there is no backlash. At this time, the motor inside the second fixed block (251) is turned off, and the rotary disk (271) is rotated, causing the rotary disk (271) to move away from the center of the feed box (23), thereby driving the clutch component (26) to move closer to the fifth gear (253), and the limiting component (28) inside the feed box (23) is stopped. Used to limit the clutch (26) to prevent the clutch (26) from rotating during movement until the clutch (26) is fully in contact with the sixth gear (254). Then the limiting member (28) no longer limits the clutch (26), starts the motor inside the second fixing block (251), drives the clutch (26) to rotate, the rotation of the clutch (26) drives the sixth gear (254) to rotate, drives the feed box (23) to move, and performs reverse feeding.

Images