Workpiece pressing device for numerically controlled lathe

Abstract

The workpiece pressing device comprises a lathe body and a pressing piece arranged in the lathe body, the pressing piece comprises a mounting frame, a driving mechanism, a first clamping mechanism and a second clamping mechanism, the mounting frame is mounted in the lathe body, the driving mechanism is arranged on the mounting frame, and the first clamping mechanism and the second clamping mechanism are arranged on the driving mechanism. The first clamping mechanism and the second clamping mechanism are symmetrically arranged on the two sides of the center line of the mounting frame, the adjusting mechanisms are mounted on the first clamping mechanism and the second clamping mechanism correspondingly, and the driving mechanism is mounted on the side, close to the first clamping mechanism, of the mounting frame. The first clamping mechanism, the second clamping mechanism and the driving mechanism are matched with one another, it can be guaranteed that the positions of clamped workpieces are adjusted according to needs, the production efficiency of the workpieces is greatly improved, and it can be guaranteed that the first clamping mechanism and the second clamping mechanism can clamp and fix the workpieces of different shapes under the action of the adjusting mechanism; and the workpiece clamping quality of the device is greatly ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of numerically controlled lathes, and in particular relates to a workpiece clamping device for numerically controlled lathes. Background Art

[0002] Before the workpiece is processed on a CNC lathe, it is generally necessary to fix it on the CNC window through a clamping mechanism. The existing clamping mechanism is generally composed of bolts and pads. This clamping method needs to be based on the thickness of the workpiece. For example, a pad with the same thickness as the plate is needed to fix the plate during the processing. When fixing, it is necessary to manually hold a wrench to fix it. This fixing method is not only time-consuming and labor-intensive, but also affects the processing efficiency of the workpiece.

[0003] After searching, the Chinese patent with application number: 202420056424.9 discloses a workpiece clamping mechanism for a CNC lathe, which relates to the technical field of workpiece positioning of CNC lathes, including: a CNC lathe body and two clamping mechanisms that can move relatively to each other arranged in the CNC lathe body; each clamping mechanism includes two first clamping plates and a second clamping plate that can move relatively to each other, and the first clamping plate and the second clamping plate are both L-shaped; an adjusting mechanism for driving the two clamping mechanisms to move is arranged in the CNC lathe body, and an adjusting member for driving the second clamping plate to move relative to the first clamping plate is arranged on the adjusting mechanism; the two first clamping plates and the second clamping plates are driven to move relative to each other through two sets of relatively movable limit sliders. The second clamping plate can be moved relative to the first clamping plate through the adjusting piece, and then the first clamping plate and the second clamping plate can be stably clamped on the outside of the workpiece, and then the workpiece can be clamped. The use of mechanical automatic clamping can improve the clamping efficiency and processing efficiency. However, the device has the following shortcomings: although the device can achieve the purpose of clamping the workpiece, it cannot be adjusted again after the workpiece is clamped. Once the position to be processed is not in the center of the workpiece, the clamped workpiece cannot be processed. In addition, the device can only clamp and fix the profile, but cannot clamp irregular workpieces, which affects the efficiency of the device in clamping and processing the workpiece. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a workpiece clamping device for a CNC lathe. The mutual cooperation among the first clamping mechanism, the second clamping mechanism and the driving mechanism in the device can ensure that the position of the clamped workpiece can be adjusted as needed, thereby greatly improving the production efficiency of the workpiece. Under the action of the adjusting mechanism, the first clamping mechanism and the second clamping mechanism can clamp and fix workpieces of different shapes, thereby greatly ensuring the clamping quality of the device for the workpiece.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A workpiece clamping device for a CNC lathe comprises a lathe body and a clamping member arranged in the lathe body, the clamping member comprises a mounting frame, a driving mechanism, a first clamping mechanism and a second clamping mechanism, the mounting frame is mounted inside the lathe body, the first clamping mechanism and the second clamping mechanism are symmetrically arranged on both sides of the center line of the mounting frame, and the first clamping mechanism is connected to the second clamping mechanism, an adjustment mechanism is installed on both the first clamping mechanism and the second clamping mechanism, the driving mechanism is installed on a side of the mounting frame close to the first clamping mechanism, and the first clamping mechanism is connected to the driving mechanism.

[0007] Preferably, the mounting frame includes a first crossbeam, a second crossbeam and a connecting beam, the first crossbeam and the second crossbeam are arranged in parallel, and a number of connecting beams are provided, and both ends of the number of connecting beams are fixedly mounted on the first crossbeam and the second crossbeam respectively, mounting grooves are provided at the bottoms of the first crossbeam and the second crossbeam, and strip holes are provided on both sides of the center line of the tops of the first crossbeam and the second crossbeam, and the strip holes are connected with the mounting grooves, and the first crossbeam and the second crossbeam are used to support the first clamping mechanism and the second clamping mechanism to ensure the normal operation of the first clamping mechanism and the second clamping mechanism, and can achieve the purpose of adjusting the clamped workpiece.

[0008] Preferably, the first clamping mechanism and the second clamping mechanism have the same structure, both comprising a movable plate, sliding blocks installed on both sides of the center line of the bottom of the movable plate, a vertical plate, a rotating arm, a lower pressure plate, a gear, a rack and a cylinder. The vertical plate is fixedly installed on one side of the top of the movable plate, the movable plate is slidably arranged above the first cross beam and the second cross beam, the sliding blocks arranged on both sides of the center line of the movable plate respectively penetrate the strip holes on the first cross beam and the second cross beam and are arranged in the installation groove, the rotating arm is symmetrically arranged on both sides of the center line of the vertical plate, one end of the rotating arm is fixedly installed with a fixed shaft, the fixed shaft is rotatably installed on the vertical plate, and a fixed column is fixedly installed on the other end of the rotating arm, guide plates are installed on both sides of the center line of the lower pressure plate, guide grooves are opened on the guide plates, the fixed column is slidably installed in the guide grooves, the gear is fixedly installed on the fixed shaft, and the rack is arranged on the gears on the fixed shaft on both sides of the center line of the vertical plate The gear train is controlled by the gear train control mechanism, and the gear train is controlled by the gear train control mechanism, and the gear train is controlled by the gear train control mechanism, and the gear train is controlled by the gear train control mechanism.

[0009] Preferably, a fixing block is fixedly installed in the middle of the mounting grooves on the first crossbeam and the second crossbeam, and a guide rod is installed on one side of the fixing block. The two ends of the guide rod are respectively installed on the fixing block and the side wall of the mounting groove. The sliding block at the bottom of the movable plate on the second clamping mechanism is slidably installed on the guide rod. The setting of the guide rod can, on the one hand, guide the second clamping mechanism, and on the other hand, prevent the second clamping mechanism from deviating during the sliding process, thereby ensuring the normal operation of the second clamping mechanism.

[0010] Preferably, it also includes a limiting mechanism and a spring. Sliding columns are installed at the bottom of the movable plate on the first clamping mechanism and the bottom of the movable plate on the second clamping mechanism. The sliding columns on the first clamping mechanism and the second clamping mechanism are both slidably connected to the limiting mechanism. The spring is sleeved on the sliding column. The spring is sleeved between the limiting mechanism and the movable plate on the first clamping mechanism or the movable plate on the second clamping mechanism. The setting of the sliding column and the limiting mechanism can achieve the purpose of adjusting the distance between the first clamping mechanism and the second clamping mechanism, ensuring that the first clamping mechanism and the second clamping mechanism cooperate with each other to clamp workpieces of different sizes, greatly improving the applicability of the device.

[0011] Preferably, the limiting mechanism includes a fixed shell, a hydraulic cylinder, a push-pull rod, a moving block and a limiting block. The sliding columns on the first clamping mechanism and the second clamping mechanism are both slidably mounted on the fixed shell. Two springs are provided, and the two springs are respectively sleeved on the sliding columns on the first clamping mechanism and the second clamping mechanism. The hydraulic cylinder is fixedly mounted on one side of the bottom of the fixed shell, and the moving block is fixedly mounted on the piston rod of the hydraulic cylinder. Strip through holes are opened on both sides of the bottom center line of the fixed shell. The limiting block is arranged in the fixed shell, and the limiting blocks are symmetrically arranged on both sides of the center line of the fixed shell. The limiting blocks are slidably matched with the strip through holes. The push-pull rods are symmetrically arranged on both sides of the moving block, and the two ends of the moving block are respectively rotated and mounted The limit blocks installed on the moving block and the limit block of the hydraulic cylinder are respectively matched with the sliding column on the first clamping mechanism and the sliding column on the second clamping mechanism. The spring is located between the fixed shell and the moving plate on the first clamping mechanism or the moving plate on the second clamping mechanism. The setting of the hydraulic cylinder, the push-pull rod and the limit block can fix the sliding column arranged at the bottom of the first clamping mechanism and the second clamping mechanism. The contraction of the hydraulic cylinder drives the moving block to move toward the side close to the hydraulic cylinder. The movement of the moving block drives one end of the push-pull rod to move, and the other end of the push-pull rod will push the limit block to move toward the side close to the sliding column until the limit block contacts the sliding column to achieve the purpose of fixing the sliding column.

[0012] Preferably, a guide rail is fixedly mounted on the vertical plate, and a slide groove is opened on the side wall of the rack, and the slide groove is slidably matched with the guide rail. A guide groove is also opened on the lower pressure plate, and the guide groove is slidably matched with the vertical plate. The setting of the guide rail and the slide groove can serve the purpose of guiding the rack and prevent the rack from tilting when moving up and down, which greatly ensures the normal operation of the rack. The setting of the guide groove can ensure the normal up and down movement of the lower pressure plate and prevent the lower pressure plate from shaking during work, which affects the fixing quality of the workpiece.

[0013] Preferably, the adjusting mechanism includes a plurality of adjusting bolts evenly installed on the lower pressure plate, a hexagonal nut is fixedly installed on the top of the adjusting bolt, and a gasket is fixedly installed on the bottom of the adjusting bolt. The arrangement of the plurality of adjusting bolts can ensure that the lower pressure plate can fix workpieces of different shapes. The arrangement of the hexagonal nut facilitates the adjustment of the adjusting bolts. The arrangement of the gasket can prevent the bottom of the hexagonal nut from directly contacting the workpiece and causing wear to the workpiece, thereby greatly ensuring the stability and safety of the workpiece during operation.

[0014] Preferably, the driving mechanism comprises a motor, a threaded rod, a belt, a first pulley and a second pulley, the threaded rod is provided with two, the two threaded rods are respectively arranged in the mounting grooves on the first crossbeam and the second crossbeam, and the two ends of the threaded rod are rotatably mounted on the side wall of the mounting groove and the other side of the fixed block, the first pulley is fixedly mounted on the threaded rod at one end away from the fixed block, the motor is fixedly mounted on the connecting beam, the second pulley is fixedly mounted on the output shaft of the motor, the first pulley and the second pulley are connected by a belt, and the sliding blocks on both sides of the center line of the moving plate on the first clamping mechanism are connected to the screw The threaded rod is threadedly connected, and the driving mechanism is used to drive the first clamping mechanism to move along the first beam and the second beam. The movement of the first clamping mechanism can drive the second clamping mechanism to move together, thereby driving the clamped workpiece to move together, greatly ensuring the efficiency and quality of the device for fixing the workpiece. The motor drives the second pulley to rotate, the rotation of the second pulley drives the belt to rotate, the rotation of the belt drives the first pulley to rotate, the rotation of the first pulley drives the threaded rod to rotate, the rotation of the threaded rod drives the sliding block on the first clamping mechanism to move along the mounting groove, and the movement of the first clamping mechanism can achieve the purpose of driving the clamped workpiece to move together.

[0015] The beneficial effects of the present invention are:

[0016] 1) The mutual cooperation among the first clamping mechanism, the second clamping mechanism and the driving mechanism in the device can ensure that the position of the clamped workpiece can be adjusted as needed, which greatly improves the production efficiency of the workpiece. Under the action of the adjusting mechanism, the first clamping mechanism and the second clamping mechanism can clamp and fix workpieces of different shapes, which greatly ensures the clamping quality of the device for the workpiece.

[0017] 2) The first crossbeam and the second crossbeam of the device are used to support the first clamping mechanism and the second clamping mechanism, ensure the normal operation of the first clamping mechanism and the second clamping mechanism, and achieve the purpose of adjusting the clamped workpiece.

[0018] 3) The first clamping mechanism and the second clamping mechanism of the device are used to fix the two ends of the workpiece, thereby achieving the purpose of fixing the workpiece and ensuring the safety and stability of the workpiece during the working process. The cylinder extends the piston rod, and the extension of the piston rod drives the rack to move upward. Since the rack is meshed with the gear, the upward movement of the rack drives the gear to rotate, and the rotation of the gear drives the fixed shaft to rotate, and the rotation of the fixed shaft drives the rotating arm to rotate. The rotating arms on both sides of the center line of the vertical plate rotate at the same time. During the rotation of the rotating arm, the fixed column slides along the guide groove on the guide plate. When the fixed column slides along the guide groove on the guide plate, it will drive the lower pressure plate to move downward. The downward movement of the lower pressure plate will achieve the purpose of fixing the workpiece on the movable plate, which greatly ensures the safety and stability of the workpiece during the working process.

[0019] 4) The setting of the guide rod of the device can, on the one hand, guide the second clamping mechanism, and on the other hand, prevent the second clamping mechanism from deviating during the sliding process, thereby ensuring the normal operation of the second clamping mechanism.

[0020] 5) The setting of the sliding column and the limiting mechanism of the device can achieve the purpose of adjusting the distance between the first clamping mechanism and the second clamping mechanism, ensuring that the first clamping mechanism and the second clamping mechanism cooperate with each other to clamp workpieces of different sizes, greatly improving the applicable scenarios of the device.

[0021] 6) The arrangement of the hydraulic cylinder, push-pull rod and limit block of the device can fix the sliding column arranged at the bottom of the first clamping mechanism and the second clamping mechanism. The contraction of the hydraulic cylinder drives the moving block to move toward the side close to the hydraulic cylinder. The movement of the moving block drives one end of the push-pull rod to move, and the other end of the push-pull rod will push the limit block to move toward the side close to the sliding column until the limit block contacts the sliding column to achieve the purpose of fixing the sliding column.

[0022] 7) The setting of the guide rail and the slide groove of this device can serve the purpose of guiding the rack and prevent the rack from tilting when moving up and down, which greatly ensures the normal operation of the rack. The setting of the guide groove can ensure the normal up and down movement of the lower pressure plate and prevent the lower pressure plate from shaking during operation, which affects the fixing quality of the workpiece.

[0023] 8) The setting of several adjusting bolts of this device can ensure that the lower pressure plate can fix workpieces of different shapes. The setting of the hexagonal nut facilitates the adjustment of the adjusting bolt. The setting of the gasket can prevent the bottom of the hexagonal nut from directly contacting the workpiece and causing wear to the workpiece, which greatly ensures the stability and safety of the workpiece during operation.

[0024] 9) The driving mechanism of the device is used to drive the first clamping mechanism to move along the first beam and the second beam. The movement of the first clamping mechanism can drive the second clamping mechanism to move together, thereby driving the clamped workpiece to move together, which greatly ensures the efficiency and quality of the device in fixing the workpiece. The motor drives the second pulley to rotate, the rotation of the second pulley drives the belt to rotate, the rotation of the belt drives the first pulley to rotate, the rotation of the first pulley drives the threaded rod to rotate, the rotation of the threaded rod drives the sliding block on the first clamping mechanism to move along the mounting groove, and the movement of the first clamping mechanism can achieve the purpose of driving the clamped workpiece to move together. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Attached Figure 1 It is a schematic diagram of the working structure of the present invention.

[0026] Attached Figure 2 The structure of the present invention is schematically shown in FIG. Figure 1 .

[0027] Attached Figure 3 The structure of the present invention is schematically shown in FIG. Figure 2 .

[0028] Attached Figure 4 This is a schematic diagram of the structure of the mounting frame in the present invention. Figure 1 .

[0029] Attached Figure 5 This is a schematic diagram of the structure of the mounting frame of the present invention. Figure 2 .

[0030] Attached Figure 6 It is a schematic diagram of the installation structure of the driving mechanism in the present invention.

[0031] Attached Figure 7 It is a schematic diagram of the installation structure of the limiting mechanism in the present invention.

[0032] Attached Figure 8 This is a schematic diagram of the structure of the first clamping mechanism in the present invention. Figure 1 .

[0033] Attached Fig. 9 This is a schematic diagram of the structure of the first clamping mechanism in the present invention. Figure 2 .

[0034] Attached Fig.10 The present invention Figure 8 Enlarged view of point A in the middle.

[0035] Attached Fig.11 It is a schematic diagram of the installation structure of the adjustment mechanism in the present invention.

[0036] Attached Fig.12 It is a structural schematic diagram of the limiting mechanism in the present invention.

[0037] Attached Fig.13It is a schematic diagram of the structure of the strip-shaped through hole in the present invention.

[0038] Attached Fig.14 It is a bottom view of the limiting mechanism in the present invention.

[0039] Attached Fig.15 It is a schematic diagram of the internal structure of the fixed shell of the present invention.

[0040] In the figure:

[0041] 1. Lathe body;

[0042] 2. Clamping parts;

[0043] 3. First clamping mechanism; 301. Moving plate; 302. Cylinder; 303. Support block; 304. Rack; 305. Vertical plate; 306. Lower pressing plate; 307. Guide groove; 308. Guide plate; 309. Fixed column; 3010. Slide rail; 3011. Rotating arm; 3012. Sliding block; 3013. Fixed shaft; 3014. Gear; 3015. Slide groove; 3016. Guide groove;

[0044] 4. Adjustment mechanism; 401. Hexagon socket nut; 402. Adjustment bolt; 403. Gasket;

[0045] 5. Second clamping mechanism;

[0046] 6. Driving mechanism; 601. Motor; 602. Second pulley; 603. First pulley; 604. Belt; 605. Threaded rod;

[0047] 7. Mounting frame; 701. First beam; 702. Connecting beam; 703. Second beam; 704. Strip hole; 705. Fixing block; 706. Mounting slot;

[0048] 8. Limiting mechanism; 801. Fixed shell; 802. Hydraulic cylinder; 803. Strip through hole; 804. Moving block; 805. Push-pull rod; 806. Limiting block;

[0049] 9. Guide rod;

[0050] 10. Spring;

[0051] 11. Sliding column. DETAILED DESCRIPTION

[0052] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] like Figure 1 , Figure 2 As shown, a workpiece clamping device for a CNC lathe comprises a lathe body 1 and a clamping member 2 arranged in the lathe body 1, the clamping member 2 comprises a mounting frame 7, a driving mechanism 6, a first clamping mechanism 3 and a second clamping mechanism 5, the mounting frame 7 is mounted inside the lathe body 1, the first clamping mechanism 3 and the second clamping mechanism 5 are symmetrically arranged on both sides of the center line of the mounting frame 7, and the first clamping mechanism 3 is connected to the second clamping mechanism 5, an adjusting mechanism 4 is installed on the first clamping mechanism 3 and the second clamping mechanism 5, the driving mechanism 6 is installed on the mounting frame 7 on one side close to the first clamping mechanism 3, and the first clamping mechanism 3 is connected to the driving mechanism 6.

[0055] As an optimization solution of the present invention, Figure 4 , Figure 5 As shown, the mounting frame 7 includes a first beam 701, a second beam 703 and a connecting beam 702. The first beam 701 and the second beam 703 are arranged in parallel. The connecting beam 702 is provided with a plurality of connecting beams. The two ends of the plurality of connecting beams 702 are respectively fixedly mounted on the first beam 701 and the second beam 703. Mounting grooves 706 are provided at the bottom of the first beam 701 and the second beam 703. Strip holes 704 are provided on both sides of the center line of the top of the first beam 701 and the second beam 703. The strip holes 704 are connected to the mounting grooves 706.

[0056] The first crossbeam 701 and the second crossbeam 703 are used to support the first clamping mechanism 3 and the second clamping mechanism 5 to ensure the normal operation of the first clamping mechanism 3 and the second clamping mechanism 5 and to achieve the purpose of adjusting the clamped workpiece.

[0057] As an optimization solution of the present invention, Figure 8 , Fig. 9As shown, the first clamping mechanism 3 and the second clamping mechanism 5 have the same structure, both of which include a moving plate 301, sliding blocks 3012 installed on both sides of the center line of the bottom of the moving plate 301, a vertical plate 305, a rotating arm 3011, a lower pressure plate 306, a gear 3014, a rack 304 and a cylinder 302. The vertical plate 305 is fixedly installed on one side of the top of the moving plate 301, and the moving plate 301 is slidably arranged above the first beam 701 and the second beam 703. The sliding blocks 3012 arranged on both sides of the center line of the moving plate 301 respectively penetrate the bar holes 704 on the first beam 701 and the second beam 703 and are arranged in the installation groove 706. The rotating arm 3011 is symmetrically arranged on both sides of the center line of the vertical plate 305. One end of the rotating arm 3011 A fixed shaft 3013 is fixedly installed, and the fixed shaft 3013 is rotatably installed on the vertical plate 305. A fixed column 309 is fixedly installed on the other end of the rotating arm 3011. Guide plates 308 are installed on both sides of the center line of the lower pressure plate 306. A guide groove 307 is opened on the guide plate 308. The fixed column 309 is slidably installed in the guide groove 307. The gear 3014 is fixedly installed on the fixed shaft 3013. The rack 304 is arranged on the gear 3014 on the fixed shaft 3013 on both sides of the center line of the vertical plate 305, and the rack 304 is meshed with the gear 3014. A support block 303 is fixedly installed on the bottom of the movable plate 301. The cylinder 302 is fixedly installed on the support block 303 and the piston rod of the cylinder 302 is connected to the rack 304.

[0058] The first clamping mechanism 3 and the second clamping mechanism 5 are used to fix the two ends of the workpiece, so as to achieve the purpose of fixing the workpiece and ensure the safety and stability of the workpiece during the working process. The cylinder 302 extends the piston rod, and the extension of the piston rod drives the rack 304 to move upward. Since the rack 304 is meshed with the gear 3014, the upward movement of the rack 304 drives the gear 3014 to rotate, and the rotation of the gear 3014 drives the fixed shaft 3013 to rotate, and the rotation of the fixed shaft 3013 drives the rotating arm 3011 to rotate, and the rotating arms 3011 located on both sides of the center line of the vertical plate 305 rotate at the same time. During the rotation of the rotating arm 3011, the fixed column 309 slides along the guide groove 307 on the guide plate 308. When the fixed column 309 slides along the guide groove 307 on the guide plate 308, it will drive the lower pressure plate 306 to move downward. The downward movement of the lower pressure plate 306 can achieve the purpose of fixing the workpiece on the movable plate 301, which greatly ensures the safety and stability of the workpiece during the working process.

[0059] As an optimization solution of the present invention, Figure 5 As shown, a fixing block 705 is fixedly installed in the middle of the mounting groove 706 on the first crossbeam 701 and the second crossbeam 703. Figure 6As shown, a guide rod 9 is installed on one side of the fixed block 705, and both ends of the guide rod 9 are respectively installed on the fixed block 705 and the side walls of the mounting groove 706, and the sliding block 3012 at the bottom of the moving plate 301 on the second clamping mechanism 5 is slidably installed on the guide rod 9.

[0060] The provision of the guide rod 9 can, on the one hand, guide the second clamping mechanism 5 , and on the other hand, prevent the second clamping mechanism 5 from deflecting during the sliding process, thereby ensuring the normal operation of the second clamping mechanism 5 .

[0061] As an optimization solution of the present invention, Figure 3 , Figure 7 As shown, it also includes a limiting mechanism 8 and a spring 10. A sliding column 11 is installed at the bottom of the movable plate 301 on the first clamping mechanism 3 and the bottom of the movable plate 301 on the second clamping mechanism 5. The sliding columns 11 on the first clamping mechanism 3 and the second clamping mechanism 5 are both slidably connected to the limiting mechanism 8. The spring 10 is sleeved on the sliding column 11. The spring 10 is sleeved between the limiting mechanism 8 and the movable plate 301 on the first clamping mechanism 3 or the movable plate 301 on the second clamping mechanism 5.

[0062] The setting of the sliding column 11 and the limiting mechanism 8 can achieve the purpose of adjusting the distance between the first clamping mechanism 3 and the second clamping mechanism 5, ensuring that the first clamping mechanism 3 and the second clamping mechanism 5 cooperate with each other to clamp workpieces of different sizes, greatly improving the applicability of the device. When the limiting mechanism 8 is set, when the first clamping mechanism 3 is moved by the driving mechanism 6, the second clamping mechanism 5 will move together with the first clamping mechanism 3, ensuring the clamping efficiency and clamping quality of the workpiece.

[0063] As an optimization solution of the present invention, Fig.12 , Fig.13 , Fig.14 , Fig.15As shown, the limiting mechanism 8 includes a fixed shell 801, a hydraulic cylinder 802, a push-pull rod 805, a moving block 804 and a limiting block 806. The sliding columns 11 on the first clamping mechanism 3 and the second clamping mechanism 5 are both slidably installed on the fixed shell 801. Two springs 10 are provided, and the two springs 10 are respectively sleeved on the sliding columns 11 on the first clamping mechanism 3 and the second clamping mechanism 5. The setting of the spring 10 ensures that when the first clamping mechanism 3 is pulled, the sliding columns 11 on the first clamping mechanism 3 and the second clamping mechanism 5 move to the outside of the fixed shell 801 at the same time, ensuring that the fixed shell 801 is always in the middle of the first clamping mechanism 3 and the second clamping mechanism 5. The hydraulic cylinder 802 is fixedly installed on one side of the bottom of the fixed shell 801, and the moving block 804 is fixedly installed on the hydraulic cylinder On the piston rod of 802, a strip through hole 803 is opened on both sides of the bottom center line of the fixed shell 801, the limit block 806 is arranged in the fixed shell 801, and the limit block 806 is symmetrically arranged on both sides of the center line of the fixed shell 801, the limit block 806 is slidably matched with the strip through hole 803, the push-pull rod 805 is symmetrically arranged on both sides of the moving block 804, and the two ends of the moving block 804 are respectively rotatably installed on the moving block 804 and the limit block 806 of the hydraulic cylinder 802, the limit blocks 806 arranged on both sides of the center line of the fixed shell 801 are respectively matched with the sliding column 11 on the first clamping mechanism 3 and the sliding column 11 on the second clamping mechanism 5, and the spring 10 is located between the fixed shell 801 and the moving plate 301 on the first clamping mechanism 3 or the moving plate 301 on the second clamping mechanism 5.

[0064] The arrangement of the hydraulic cylinder 802, the push-pull rod 805 and the limit block 806 can fix the sliding column 11 arranged at the bottom of the first clamping mechanism 3 and the second clamping mechanism 5. The hydraulic cylinder 802 contracts and drives the moving block 804 to move toward the side close to the hydraulic cylinder 802. The movement of the moving block 804 drives one end of the push-pull rod 805 to move. The other end of the push-pull rod 805 pushes the limit block 806 to move toward the side close to the sliding column 11 until the limit block 806 contacts the sliding column 11 to achieve the purpose of fixing the sliding column 11.

[0065] As an optimization solution of the present invention, Figure 8 As shown, a guide rail is also fixedly installed on the vertical plate 305, such as Fig.10 As shown, a slide groove 3015 is provided on the side wall of the rack 304, and the slide groove 3015 is slidably matched with the guide rail. Fig.11 As shown, a guide groove 3016 is also formed on the lower pressing plate 306 , and the guide groove 3016 is slidably matched with the vertical plate 305 .

[0066] The setting of the guide rail and the slide groove 3015 can guide the rack 304 and prevent the rack 304 from tilting when moving up and down, thereby greatly ensuring the normal operation of the rack 304. The setting of the guide groove 3016 can ensure the normal up and down movement of the lower pressure plate 306 and prevent the lower pressure plate 306 from shaking during operation, thereby affecting the fixing quality of the workpiece.

[0067] As an optimization solution of the present invention, Fig.11 As shown, the adjustment mechanism 4 includes a plurality of adjustment bolts 402 evenly mounted on the lower pressure plate 306 , a hexagon socket nut 401 is fixedly mounted on the top of the adjustment bolt 402 , and a gasket 403 is fixedly mounted on the bottom of the adjustment bolt 402 .

[0068] The setting of several adjusting bolts 402 can ensure that the lower pressure plate 306 can fix workpieces of different shapes. The setting of the hexagon socket nut 401 facilitates the adjustment of the adjusting bolt 402. The setting of the gasket 403 can prevent the bottom of the hexagon socket nut 401 from directly contacting the workpiece and causing wear to the workpiece, thereby greatly ensuring the stability and safety of the workpiece during operation.

[0069] During operation, the adjusting bolts 402 are first adjusted to ensure that the adjusting bolts 402 can contact different protrusions above the workpiece, and the lower pressing plate 306 is continuously moved downward, thereby achieving the purpose of fixing the workpiece.

[0070] As an optimization solution of the present invention, Figure 6 As shown, the driving mechanism 6 includes a motor 601, a threaded rod 605, a belt 604, a first pulley 603 and a second pulley 602. Two threaded rods 605 are provided, and the two threaded rods 605 are respectively arranged in the mounting grooves 706 on the first beam 701 and the second beam 703, and the two ends of the threaded rod 605 are respectively rotatably mounted on the side wall of the mounting groove 706 and the other side of the fixed block 705. The first pulley 603 is fixedly mounted on the end of the threaded rod 605 away from the fixed block 705, the motor 601 is fixedly mounted on the connecting beam 702, and the second pulley 602 is fixedly mounted on the output shaft of the motor 601. The first pulley 603 and the second pulley 602 are connected by the belt 604, and the sliding blocks 3012 on both sides of the center line of the moving plate 301 on the first clamping mechanism 3 are threadedly connected to the threaded rod 605.

[0071] The driving mechanism 6 is used to drive the first clamping mechanism 3 to move along the first beam 701 and the second beam 703. The movement of the first clamping mechanism 3 can drive the second clamping mechanism 5 to move together, thereby achieving the purpose of driving the clamped workpiece to move together, which greatly ensures the efficiency and quality of the device for fixing the workpiece. The motor 601 drives the second pulley 602 to rotate, and the rotation of the second pulley 602 drives the belt 604 to rotate. The rotation of the belt 604 drives the first pulley 603 to rotate. The rotation of the first pulley 603 drives the threaded rod 605 to rotate. The rotation of the threaded rod 605 drives the sliding block 3012 on the first clamping mechanism 3 to move along the mounting groove 706. The movement of the first clamping mechanism 3 achieves the purpose of driving the clamped workpiece to move together.

[0072] The cooperation among the sliding column, the limiting mechanism and the driving mechanism can drive the clamped workpiece to move on the mounting frame.

[0073] The above contents are merely examples and explanations of the structure of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the scope defined by the structure of the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A workpiece clamping device for a CNC lathe, comprising a lathe body and a clamping member arranged in the lathe body, characterized in that: The clamping member includes a mounting frame, a driving mechanism, a first clamping mechanism and a second clamping mechanism. The mounting frame is installed inside the lathe body, the first clamping mechanism and the second clamping mechanism are symmetrically arranged on both sides of the center line of the mounting frame, and the first clamping mechanism is connected to the second clamping mechanism. Adjustment mechanisms are installed on the first clamping mechanism and the second clamping mechanism. The driving mechanism is installed on a side of the mounting frame close to the first clamping mechanism, and the first clamping mechanism is connected to the driving mechanism.

2. A workpiece clamping device for a CNC lathe according to claim 1, characterized in that: The mounting frame includes a first crossbeam, a second crossbeam and a connecting beam. The first crossbeam and the second crossbeam are arranged in parallel. There are a plurality of connecting beams. Both ends of the plurality of connecting beams are fixedly mounted on the first crossbeam and the second crossbeam respectively. Mounting grooves are provided at the bottoms of the first crossbeam and the second crossbeam. Strip holes are provided on both sides of the center line of the tops of the first crossbeam and the second crossbeam, and the strip holes are connected to the mounting grooves.

3. A workpiece clamping device for a CNC lathe according to claim 2, characterized in that: The first clamping mechanism and the second clamping mechanism have the same structure, both of which include a moving plate, sliding blocks installed on both sides of the center line of the bottom of the moving plate, a vertical plate, a rotating arm, a lower pressure plate, a gear, a rack and a cylinder. The vertical plate is fixedly installed on one side of the top of the moving plate, and the moving plate is slidably arranged above the first crossbeam and the second crossbeam. The sliding blocks arranged on both sides of the center line of the moving plate respectively penetrate the strip holes on the first crossbeam and the second crossbeam and are arranged in the mounting groove. The rotating arm is symmetrically arranged on both sides of the center line of the vertical plate, and a fixed shaft is fixedly installed on one end of the rotating arm, and the fixed shaft is rotatably installed on the vertical plate. A fixed column is fixedly installed on the other end of the rotating arm, a guide plate is installed on both sides of the center line of the lower pressure plate, and a guide groove is opened on the guide plate, and the fixed column is slidably installed in the guide groove, the gear is fixedly installed on the fixed shaft, and the rack is arranged on the gear on the fixed shaft on both sides of the center line of the vertical plate, and the rack is meshed with the gear, a support block is fixedly installed at the bottom of the moving plate, and the cylinder is fixedly installed on the support block and the piston rod of the cylinder is connected to the rack.

4. A workpiece clamping device for a CNC lathe according to claim 3, characterized in that: A fixed block is fixedly installed in the middle of the mounting grooves on the first beam and the second beam, a guide rod is installed on one side of the fixed block, two ends of the guide rod are respectively installed on the fixed block and the side wall of the mounting groove, and the sliding block at the bottom of the movable plate on the second clamping mechanism is slidably installed on the guide rod.

5. A workpiece clamping device for a CNC lathe according to claim 4, characterized in that: It also includes a limiting mechanism and a spring. Sliding columns are installed at the bottom of the movable plate on the first clamping mechanism and the bottom of the movable plate on the second clamping mechanism. The sliding columns on the first clamping mechanism and the second clamping mechanism are both slidably connected to the limiting mechanism. The spring is sleeved on the sliding column. The spring is sleeved between the limiting mechanism and the movable plate on the first clamping mechanism or the movable plate on the second clamping mechanism.

6. A workpiece clamping device for a CNC lathe according to claim 5, characterized in that: The camming mechanism comprises a fixed shell, a hydraulic cylinder, a push-pull rod, a moving block and a limiting block. The sliding columns on the first clamping mechanism and the second clamping mechanism are both slidably mounted on the fixed shell. The two springs are respectively sleeved on the sliding columns on the first clamping mechanism and the second clamping mechanism. The hydraulic cylinder is fixedly mounted on one side of the bottom of the fixed shell. The moving block is fixedly mounted on the piston rod of the hydraulic cylinder. Strip through holes are opened on both sides of the center line of the bottom of the fixed shell. The limiting block is arranged in the fixed shell, and the limiting blocks are symmetrically arranged on both sides of the center line of the fixed shell. The limiting blocks are slidably matched with the strip through holes. The push-pull rods are symmetrically arranged on both sides of the moving block, and the two ends of the moving block are respectively rotatably mounted on the moving block and the limiting block of the hydraulic cylinder. The limiting blocks arranged on both sides of the center line of the fixed shell are respectively matched with the sliding columns on the first clamping mechanism and the sliding columns on the second clamping mechanism. The spring is located between the fixed shell and the moving plate on the first clamping mechanism or the moving plate on the second clamping mechanism.

7. The workpiece clamping device for a CNC lathe according to claim 3, characterized in that: A guide rail is fixedly mounted on the vertical plate, a slide groove is provided on the side wall of the rack, the slide groove is slidably matched with the guide rail, and a guide groove is provided on the lower pressure plate, the guide groove is slidably matched with the vertical plate.

8. The workpiece clamping device for a CNC lathe according to claim 3, characterized in that: The adjusting mechanism comprises a plurality of adjusting bolts evenly mounted on the lower pressing plate, a hexagonal nut is fixedly mounted on the top of the adjusting bolt, and a gasket is fixedly mounted on the bottom of the adjusting bolt.

9. The workpiece clamping device for a CNC lathe according to claim 3, characterized in that: The driving mechanism includes a motor, a threaded rod, a belt, a first pulley and a second pulley. Two threaded rods are provided. The two threaded rods are respectively arranged in mounting grooves on the first beam and the second beam, and two ends of the threaded rod are rotatably mounted on the side walls of the mounting groove and the other side of the fixed block respectively. The first pulley is fixedly mounted on the end of the threaded rod away from the fixed block, the motor is fixedly mounted on the connecting beam, and the second pulley is fixedly mounted on the output shaft of the motor. The first pulley and the second pulley are connected by a belt, and the sliding blocks on both sides of the center line of the moving plate on the first clamping mechanism are threadedly connected to the threaded rod.

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