Numerically-controlled lathe tool rest

Abstract

The invention belongs to the technical field of machine tools, and particularly relates to a numerical control lathe tool rest which is characterized in that the numerical control lathe tool rest comprises a tool rest base, a cavity is formed in the tool rest base, a rotating mechanism is arranged between the interior of the cavity and one side of the tool rest base, and a lower tool body is rotationally connected to the top of the tool rest base; the top of the lower cutter body is connected with a plurality of limiting rods through bolts, the limiting rods are made of telescopic materials, the outer walls of the limiting rods are sleeved with first springs, the tops of the limiting rods are connected with an upper cutter body through bolts, a through hole is formed in the top of the upper cutter body in a penetrating mode, and a screw rod is slidably connected to the inner wall of the through hole. Through extrusion of the extrusion block, the fixing stability of the tool can be improved, and the situation that in the fixing process of the tool, due to work of a machine tool, the tool deviates when being fixed, and consequently machining deviation of a workpiece is caused is prevented.

Description

Technical Field

[0001] The present invention relates to the field of machine tools, and particularly to a numerical control lathe tool rest. Background Art

[0002] The tool rest on a numerical control machine tool is an important component for placing tools. Many tool rests also directly participate in the cutting work, such as the square tool rest on a horizontal lathe, the turret tool rest on a turret lathe, the turret tool rest on a revolving turret lathe, the turret tool rest and the balance tool rest on an automatic lathe, etc. These tool rests not only place tools but also directly participate in the cutting and bear a great cutting force.

[0003] After retrieval, a Chinese patent application with the publication number CN111496282A discloses a structure of an automatic indexing tool rest for a numerical control lathe, including a base. One end of the base is equipped with a motor, and the motor is located in the middle of the base. A worm is arranged inside the base, and the worm is located in the middle of the base. A fixing plate is installed at the bottom end of the worm, and the fixing plate is located at the bottom end inside the base. A rotating shaft is arranged on the worm, and the rotating shaft is located in the middle of the worm. A frame is installed at the top end of the base. In the present invention, a fixing plate is arranged inside the base to connect the bottom end position of the rotating shaft and at the same time limit the bottom end position of the rotating shaft, ensuring the position fixation of the rotating shaft during the worm drive, effectively solving the protection problem during the rotation of the worm. A cylindrical pin is arranged between the shaft sleeve and the disc to fixedly connect and limit the position of the limiting disc, further realizing the problem of the rotation precision of the rotating shaft and improving the rotation precision of the tool rest seat.

[0004] When the existing tool rest fixes the tool, the tool is usually placed on the lower tool body, and the upper tool body is moved to clamp and fix the tool. However, during the fixing process, the tool often shifts during fixation due to the operation of the machine tool, resulting in deviation in the machining of the workpiece. Summary of the Invention

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

[0006] A numerical control lathe tool rest, comprising a tool rest base. A cavity is provided inside the tool rest base, and there is a rotating mechanism between the inside of the cavity and one side setting of the tool rest base. A lower tool body is rotatably connected to the top of the tool rest base. A plurality of limiting rods are bolted to the top of the lower tool body, and the limiting rods are made of telescopic material. A first spring is sleeved on the outer wall of the limiting rod. An upper tool body is bolted to the top of the limiting rod, and a through hole is formed through the top of the upper tool body. A screw rod is slidably connected to the inner wall of the through hole, and the bottom of the screw rod is fixedly connected to the top of the lower tool body. A limiting nut is threadedly connected to the outer wall of the screw rod, and a handle is welded to one side of the limiting nut. The bottom of the limiting nut contacts the top of the upper tool body. A plurality of threaded holes are formed through the top of the upper tool body, and fastening bolts are threadedly connected to the inner walls of the threaded holes. A fixing mechanism is provided between the upper tool body and the lower tool body.

[0007] Preferably, the fixing mechanism includes a support plate, two limiting plates and a pressing block. The top of the pressing block is bolted to the bottom of the upper tool body. A threaded port is formed through the top of the pressing block, and the position of the threaded port corresponds to that of the threaded hole. The threaded hole and the threaded port have the same size. A limiting groove is formed in the top of the lower tool body. The two limiting plates are bolted between the opposite sides of the limiting groove. A second spring is bolted between the bottom of the support plate and the bottom of the limiting groove. A baffle is bolted to one side of the top of the support plate. Two guiding grooves are formed in both opposite sides of the limiting groove. A guiding block is slidably connected to the inner wall of each of the two guiding grooves, and the guiding block is bolted to the support plate. The position of the pressing block corresponds to that of the limiting groove.

[0008] Preferably, the rotating mechanism includes a motor, a worm, a rotating shaft and a worm gear. The two ends of the worm are rotatably connected to the opposite sides of the cavity through bearings. A coupling is fixed to one end of the worm, and one end of the coupling is fixed to the motor. The bottom of the motor is bolted to a support frame, and the bottom of the support frame and the bottom of the tool rest base are on the same plane. The two ends of the rotating shaft are rotatably connected to the top and bottom of the cavity through bearings. The worm gear is fixedly sleeved on the outer wall of the rotating shaft. The worm gear meshes with the worm. The top of the rotating shaft is fixedly connected to the bottom of the lower tool body.

[0009] Preferably, a support groove is formed in the top of the tool rest base, and the shape of the support groove is annular. A support ring is slidably connected to the inner wall of the support groove. The rotating shaft is located inside the support ring.

[0010] Preferably, a reinforcing mechanism is provided on one side of the limiting groove, and the reinforcing mechanism forms a cooperation with the fixing mechanism.

[0011] Preferably, the reinforcement mechanism is composed of a reinforcement plate, a push plate and a transmission component. One side of the reinforcement plate is bolted to the push plate, and the support plate is connected to the push plate through the transmission component. Sliding grooves are formed on both sides of the top of the support plate, and sliders are slidably connected to the inner walls of the two sliding grooves. The tops of the two sliders are bolted to the reinforcement plate. A pull-out groove is formed between one side of the top of the lower tool body and the limit groove, and the push plate is slidably connected to the pull-out groove.

[0012] Preferably, positioning grooves are formed on both opposite sides of the pull-out groove, and limit strips are slidably connected to the inner walls of the two positioning grooves. The two limit strips are symmetrically fixed on both sides of the push plate.

[0013] Preferably, the transmission component is composed of a first gear, a second rack, two second gears and two first racks. The top of the second rack is bolted to the bottom of the push plate. A connection groove is formed at the bottom of the pull-out groove, and the second rack is located inside the connection groove. Two notches are formed between one side of the top of the lower tool body and the limit groove. A rotating rod is rotatably connected between the two notches and the connection groove through bearings. The first gear is fixedly sleeved on the outer wall of the rotating rod. The first gear meshes with the second rack. The two second gears are fixedly sleeved on both sides of the outer wall of the rotating rod. The two second gears mesh with the two first racks. Fixed grooves are formed at both ends of one side of the support plate, and the two first racks are fixed inside the two fixed grooves.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. By setting the fixing mechanism of the present invention, when fixing the tool, the tool is placed inside the limit groove of the lower tool body. After placement, the limit nut is rotated through the handle. At this time, the limit nut will drive the upper tool body to move downward under the action of the screw rod. The distance between the pressing block and the tool will gradually approach. When the bottom of the pressing block contacts the tool, at this time, as the upper tool body continues to move downward, the pressing block will perform an extrusion and fixing process on the tool, and the tool will drive the support plate to move downward under the action of the pressing block. When the bottom of the support plate acts on the limit plate, the tool will stop moving downward. At this time, the pressing block will complete the fixing process of the tool. Therefore, the stability of the tool fixing can be improved through the extrusion of the pressing block, preventing the tool from shifting during fixing due to the operation of the machine tool, thereby causing deviation in the processing of the workpiece. When the fixing is completed, the limit nut is reversed, and the distance between the upper tool body and the lower tool body will increase. At this time, the pressing force of the pressing block on the tool will decrease, and the support plate will drive the tool to move upward under the action of the second spring, facilitating the disassembly of the tool;

[0016] 2. In the present invention, through the provided fixing mechanism and reinforcement mechanism, when the tool is fixed by the fixing mechanism, as the support plate moves downward, at this time, the first rack will move downward along with the downward movement of the support plate. At this time, through meshing, the first rack drives the second gear to rotate, and when the second gear rotates, it drives the rotating rod to rotate synchronously. At this time, the first gear will rotate synchronously with the rotation of the rotating rod. At this time, under the action of meshing, the first gear drives the second rack to slide to one side, and when the second rack slides, it pushes the push plate to move to one side, and the push plate then pushes the reinforcement plate to move towards one side of the tool, thereby reinforcing the tool through the reinforcement plate. Thus, through the cooperation and joint action between the fixing mechanism and the reinforcement mechanism, the tool can be effectively fixed, thereby improving the stability of tool fixation, facilitating the improvement of the machining effect of the tool on the workpiece, and preventing the tool from deflecting to one side due to poor stability during fixation, thereby causing deviation in the machining of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a tool rest of a numerically controlled lathe proposed by the present invention;

[0018] Figure 2 is a schematic side view structural diagram of a tool rest of a numerically controlled lathe proposed by the present invention;

[0019] Figure 3 is a schematic structural diagram of a rotating mechanism of a tool rest of a numerically controlled lathe proposed by the present invention;

[0020] Figure 4 is a schematic partial structural diagram of a tool rest of a numerically controlled lathe proposed by the present invention;

[0021] Figure 5 is a schematic structural diagram of a lower tool body of a tool rest of a numerically controlled lathe proposed by the present invention;

[0022] Figure 6 is a schematic structural diagram of a reinforcement mechanism of a tool rest of a numerically controlled lathe proposed by the present invention;

[0023] Figure 7 is a schematic structural diagram of a transmission component of a tool rest of a numerically controlled lathe proposed by the present invention.

[0024] In the accompanying drawings: 1. Rotating mechanism; 2. Tool rest base; 3. Lower tool body; 4. Upper tool body; 5. Fastening bolt; 6. Screw rod; 7. Limit nut; 8. Extrusion block; 9. Handle; 10. Support frame; 11. Motor; 12. Coupling; 13. Worm; 14. Rotating shaft; 15. Worm gear; 16. Support ring; 17. Limit groove; 18. Limit plate; 19. Support plate; 20. Baffle plate; 21. Reinforcement mechanism; 22. Guide groove; 23. Notch; 24. Pulling groove; 25. Positioning groove; 26. Connecting groove; 27. Slide groove; 28. Slide block; 29. Reinforcement plate; 30. Second spring; 31. Guide block; 32. Push plate; 33. Limit strip; 34. Transmission assembly; 35. Rotating rod; 36. First gear; 37. Second gear; 38. First rack; 39. Second rack. Detailed implementation mode

[0025] Example 1, referring to Figures 1-6 , a numerical control lathe tool rest, including a tool rest base 2. A cavity is provided inside the tool rest base 2, and there is a rotating mechanism 1 between the inside of the cavity and one side of the tool rest base 2. The top of the tool rest base 2 is rotatably connected with a lower tool body 3. The top of the lower tool body 3 is connected with a plurality of limit rods through bolts, and the limit rods are made of telescopic material. A first spring is sleeved on the outer wall of the limit rods. The top of the limit rods is connected with an upper tool body 4 through bolts. A through hole is provided through the top of the upper tool body 4. A screw rod 6 is slidably connected to the inner wall of the through hole, and the bottom of the screw rod 6 is fixedly connected to the top of the lower tool body 3. A limit nut 7 is threadedly connected to the outer wall of the screw rod 6, and a handle 9 is welded to one side of the limit nut 7. The bottom of the limit nut 7 contacts the top of the upper tool body 4. A plurality of threaded holes are provided through the top of the upper tool body 4, and a fastening bolt 5 is threadedly connected to the inner wall of the threaded holes. A fixing mechanism is provided between the upper tool body 4 and the lower tool body 3.

[0026] On the basis of the above, the fixing mechanism includes a support plate 19, two limit plates 18 and an extrusion block 8. The top of the extrusion block 8 is connected with the bottom of the upper tool body 4 through bolts. A threaded opening is provided through the top of the extrusion block 8, and the position of the threaded opening corresponds to that of the threaded hole. The threaded hole and the threaded opening have the same size. A limit groove 17 is provided at the top of the lower tool body 3. The two limit plates 18 are connected through bolts between the two opposite sides corresponding to the limit groove 17. A second spring 30 is connected through bolts between the bottom of the support plate 19 and the bottom of the limit groove 17. A baffle plate 20 is connected through bolts to one side of the top of the support plate 19. Two guide grooves 22 are provided on both opposite sides of the limit groove 17. A guide block 31 is slidably connected to the inner wall of each of the two guide grooves 22. The guide block 31 is connected with the support plate 19 through bolts. The position of the extrusion block 8 corresponds to that of the limit groove 17.

[0027] On the basis described above, the rotating mechanism 1 includes a motor 11, a worm 13, a rotating shaft 14 and a worm gear 15. Both ends of the worm 13 are rotatably connected to the opposite sides of the cavity through bearings. A coupling 12 is fixed to one end of the worm 13, and one end of the coupling 12 is fixedly connected to the motor 11. The bottom of the motor 11 is bolted to a support frame 10, and the bottom of the support frame 10 and the bottom of the tool rest base 2 are on the same plane. The top and bottom of the cavity are rotatably connected to both ends of the rotating shaft 14 through bearings. The worm gear 15 is fixedly sleeved on the outer wall of the rotating shaft 14. The worm gear 15 meshes with the worm 13. The top of the rotating shaft 14 is fixedly connected to the bottom of the lower tool body 3.

[0028] On the basis described above, a support groove is formed at the top of the tool rest base 2, and the shape of the support groove is annular. A support ring 16 is slidably connected to the inner wall of the support groove. The rotating shaft 14 is located inside the support ring 16.

[0029] Embodiment 2, referring to Figures 1-7 , a numerical control lathe tool rest. Compared with Embodiment 1, on the basis of Embodiment 1, a reinforcement mechanism 21 is provided on one side of the limit groove 17, and the reinforcement mechanism 21 cooperates with the fixing mechanism.

[0030] On the basis described above, the reinforcement mechanism 21 is composed of a reinforcement plate 29, a push plate 32 and a transmission component 34. One side of the reinforcement plate 29 is bolted to the push plate 32. The support plate 19 is connected to the push plate 32 through the transmission component 34. Sliding grooves 27 are formed on both sides of the top of the support plate 19. Sliders 28 are slidably connected to the inner walls of the two sliding grooves 27. The tops of the two sliders 28 are bolted to the reinforcement plate 29. A draw groove 24 is formed between one side of the top of the lower tool body 3 and the limit groove 17. The push plate 32 is slidably connected to the draw groove 24.

[0031] On the basis described above, positioning grooves 25 are formed on both opposite sides of the draw groove 24, and limit bars 33 are slidably connected to the inner walls of the two positioning grooves 25. The two limit bars 33 are symmetrically fixed to both sides of the push plate 32.

[0032] On the basis described above, the transmission assembly 34 is composed of a first gear 36, a second rack 39, two second gears 37 and two first racks 38. The top of the second rack 39 is bolted to the bottom of the push plate 32. A connection groove 26 is formed at the bottom of the drawing slot 24. The second rack 39 is located inside the connection groove 26. Two notches 23 are formed between one side of the top of the lower tool body 3 and the limit groove 17. A rotating rod 35 is rotatably connected between the two notches 23 and the connection groove 26 through a bearing. The first gear 36 is fixedly sleeved on the outer wall of the rotating rod 35. The first gear 36 meshes with the second rack 39. The two second gears 37 are fixedly sleeved on both sides of the outer wall of the rotating rod 35. The two second gears 37 mesh with the two first racks 38. Fixing grooves are formed at both ends of one side of the support plate 19. The two first racks 38 are fixed inside the two fixing grooves.

[0033] In summary, by means of the above technical solution of the present invention: when fixing the tool, place the tool inside the limit groove 17 of the lower tool body 3. After placement, rotate the limit nut 7 through the handle 9. At this time, the limit nut 7 will drive the upper tool body 4 to move downward under the action of the screw rod 6. The distance between the pressing block 8 and the tool will gradually approach. When the bottom of the pressing block 8 contacts the tool, at this time, as the upper tool body 4 continues to move downward, the pressing block 8 will perform a pressing and fixing process on the tool. The tool will drive the support plate 19 to move downward under the action of the pressing block 8. When the bottom of the support plate 19 acts on the limit plate 18, the tool will stop moving downward. At this time, the pressing block 8 will complete the fixing process on the tool. Thus, the stability of the tool fixing can be improved through the extrusion of the pressing block 8, preventing the tool from shifting during the fixing process due to the operation of the machine tool, thereby causing deviation in the machining of the workpiece. When the fixing is completed, reverse the limit nut 7, and the distance between the upper tool body 4 and the lower tool body 3 will increase. At this time, the pressing force of the pressing block 8 on the tool will decrease, and the support plate 19 will drive the tool to move upward under the action of the second spring 30, facilitating the disassembly of the tool. When the tool is fixed by the fixing mechanism, as the support plate 19 moves downward, at this time, the first rack 38 will move downward as the support plate 19 moves downward. At this time, through meshing, the first rack 38 drives the second gear 37 to rotate, and when the second gear 37 rotates, it will drive the rotating rod 35 to rotate synchronously. At this time, the first gear 36 will rotate synchronously with the rotation of the rotating rod 35. At this time, the first gear 36 will drive the second rack 39 to slide to one side under the action of meshing, and when the second rack 39 slides, it will push the push plate 32 to move to one side, and the push plate 32 will push the reinforcement plate 29 to move toward the tool, thereby performing a reinforcement process on the tool through the reinforcement plate 29. Thus, through the cooperation and joint action between the fixing mechanism and the reinforcement mechanism 21, the tool can be effectively fixed, thereby improving the stability of the tool fixing.

[0034] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A tool rest for a numerically controlled lathe, comprising a tool rest base (2), characterized in that: The tool holder base (2) has a cavity inside, and a rotating mechanism (1) is provided between the inside of the cavity and one side of the tool holder base (2). The top of the tool holder base (2) is provided with a lower tool body (3) rotatably connected thereto. The top of the lower tool body (3) is connected to a plurality of limit rods by bolts, and the limit rods are made of telescopic material. The outer wall of the limit rod is sleeved with a first spring. The top of the limit rod is connected to an upper tool body (4) by bolts, and a through hole is provided through the top of the upper tool body (4). The inner wall is slidably connected with a screw rod (6), and the bottom of the screw rod (6) is fixedly connected with the top of the lower blade body (3). The outer wall of the screw rod (6) is threadedly connected with a limit nut (7), and a handle (9) is welded on one side of the limit nut (7). The bottom of the limit nut (7) contacts the top of the upper blade body (4). The top of the upper blade body (4) is penetrated by a plurality of threaded holes, and the inner wall of the threaded hole is threadedly connected with a fastening bolt (5), and a fixing mechanism is arranged between the upper blade body (4) and the lower blade body (3).

2. A CNC lathe tool rest according to claim 1, characterized in that: The fixing mechanism comprises a support plate (19), two limiting plates (18) and an extrusion block (8), and the top of the extrusion block (8) is connected to the bottom of the upper blade body (4) by bolts. A threaded opening is provided through the top of the extrusion block (8), the position of the threaded opening corresponds to the position of the threaded hole, and the size of the threaded hole is the same as that of the threaded opening. A limiting groove (17) is provided at the top of the lower blade body (3), the two limiting plates (18) are connected to the two opposite sides of the limiting groove (17) by bolts, a second spring (30) is connected between the bottom of the support plate (19) and the bottom of the limiting groove (17) by bolts, a baffle (20) is connected to one side of the top of the support plate (19) by bolts, two guide grooves (22) are provided on the opposite sides of the limiting groove (17), the inner walls of the two guide grooves (22) are slidably connected to guide blocks (31), the guide blocks (31) are connected to the support plate (19) by bolts, and the position of the extrusion block (8) corresponds to the position of the limiting groove (17).

3. The CNC lathe tool rest according to claim 1, characterized in that: The rotating mechanism (1) comprises a motor (11), a worm (13), a rotating shaft (14) and a worm wheel (15), and the two ends of the worm (13) are rotatably connected to the two opposite sides of the cavity via bearings, a coupling (12) is fixed to one end of the worm (13), and one end of the coupling (12) is fixedly connected to the motor (11), the bottom of the motor (11) is connected to a support frame (10) via bolts, the bottom of the support frame (10) and the bottom of the tool holder base (2) are located on the same plane, the top and bottom of the cavity are rotatably connected to the two ends of the rotating shaft (14) via bearings, the worm wheel (15) is fixedly sleeved on the outer wall of the rotating shaft (14), the worm wheel (15) is meshed with the worm (13), and the top of the rotating shaft (14) is fixedly connected to the bottom of the lower tool body (3).

4. The CNC lathe tool rest according to claim 3, characterized in that: A support groove is provided on the top of the tool holder base (2), and the shape of the support groove is annular. A support ring (16) is slidably connected to the inner wall of the support groove, and the rotating shaft (14) is located inside the support ring (16).

5. The CNC lathe tool rest according to claim 2, characterized in that: A reinforcing mechanism (21) is provided on one side of the limiting groove (17), and the reinforcing mechanism (21) cooperates with the fixing mechanism.

6. The CNC lathe tool rest according to claim 5, characterized in that: The reinforcement mechanism (21) is composed of a reinforcement plate (29), a push plate (32) and a transmission assembly (34), and one side of the reinforcement plate (29) is connected to the push plate (32) by bolts, and the support plate (19) and the push plate (32) are connected by the transmission assembly (34). Both sides of the top of the support plate (19) are provided with sliding grooves (27), and the inner walls of the two sliding grooves (27) are slidably connected with sliders (28). The tops of the two sliders (28) are connected to the reinforcement plate (29) by bolts. A drawing groove (24) is provided between one side of the top of the lower knife body (3) and the limiting groove (17), and the push plate (32) is slidably connected to the drawing groove (24).

7. The CNC lathe tool rest according to claim 6, characterized in that: Positioning grooves (25) are provided on opposite sides of the pull-out groove (24), and the inner walls of the two positioning grooves (25) are slidably connected to limit bars (33), and the two limit bars (33) are symmetrically fixed on the two sides of the push plate (32).

8. The CNC lathe tool rest according to claim 6, characterized in that: The transmission assembly (34) is composed of a first gear (36), a second rack (39), two second gears (37) and two first racks (38). The top of the second rack (39) is connected to the bottom of the push plate (32) by bolts. A connecting groove (26) is provided at the bottom of the pull-out groove (24). The second rack (39) is located inside the connecting groove (26). Two notches (23) are provided between one side of the top of the lower blade body (3) and the limiting groove (17). The two notches (23) are connected to the push plate (32) by bolts. A rotating rod (35) is rotatably connected between the connecting grooves (26) via a bearing, a first gear (36) is fixedly sleeved on the outer wall of the rotating rod (35), the first gear (36) is meshed with a second rack (39), two second gears (37) are fixedly sleeved on both sides of the outer wall of the rotating rod (35), the two second gears (37) are meshed with two first racks (38), and both ends of one side of the support plate (19) are provided with fixed grooves, and the two first racks (38) are fixed inside the two fixed grooves.

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