Workpiece pressing mechanism for numerically controlled lathe

Abstract

The utility model discloses a workpiece hold-down mechanism for a numerically controlled lathe, which relates to the technical field of numerically controlled lathes and comprises a workbench, two clamping plates in mirror image distribution are slidably mounted on the workbench, and two limiting plates in symmetrical distribution are slidably mounted on the sides, close to each other, of the two clamping plates. First bidirectional lead screws are rotatably installed in the two clamping plates, sliding grooves are fixedly installed in the middles of the upper surfaces of the two clamping plates, pressing plates are slidably installed on the sides, close to each other, of the two sliding grooves, and threaded rods are rotatably installed in the two sliding grooves. According to the workpiece centering clamping device, a workpiece is clamped in the middle, then according to the width of the workpiece, the first bidirectional lead screw is used for driving the two corresponding limiting plates to slide and get close to each other to conduct centering clamping and fixing on the workpiece, and therefore the purpose that the workpiece can be clamped and fixed according to the size of different workpieces is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled lathes, in particular to a workpiece pressing mechanism for numerically controlled lathes. Background Art

[0002] The clamping mechanism of a CNC lathe is a device used to fix the workpiece on a CNC lathe. It can generate a clamping force to press the workpiece against the workbench so that it can maintain an accurate positioning position during the processing. It will not produce position changes and vibrations due to cutting force, workpiece gravity, vibration of the CNC lathe, etc., thereby ensuring processing accuracy and safe operation.

[0003] Some existing workpiece clamping mechanisms for CNC lathes cannot be adjusted and clamped according to the sizes of different workpieces, and can only clamp and fix workpieces of fixed sizes. When workpieces of different sizes need to be processed, the matching clamping mechanism needs to be replaced to clamp and fix them, which is not only time-consuming and labor-intensive, but also has low processing efficiency. In response to the above problems, the inventors proposed a workpiece clamping mechanism for CNC lathes to solve the above problems. Utility Model Content

[0004] In order to solve the problem that some existing workpiece clamping mechanisms for CNC lathes cannot be adjusted and clamped according to the sizes of different workpieces, which is not only time-consuming and labor-intensive but also has low processing efficiency; the purpose of this utility model is to provide a workpiece clamping mechanism for a CNC lathe.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a workpiece clamping mechanism for a CNC lathe, comprising a worktable, on which two clamping plates with mirror distribution are slidably installed, and two symmetrically distributed limit plates are slidably installed on the sides where the two clamping plates are close to each other, a first bidirectional screw rod is rotatably installed in each of the two clamping plates, and the first bidirectional screw rod is threadedly inserted in the corresponding two limit plates, a slide groove is fixedly installed in the middle of the upper surface of the two clamping plates, and a clamping plate is slidably installed on the sides where the two slide grooves are close to each other, a threaded rod is rotatably installed in each of the two slide grooves, and the threaded rod is threadedly inserted in the corresponding clamping plate.

[0006] Preferably, a second bidirectional screw is rotatably installed in the workbench, and the second bidirectional screw is threadedly inserted in the bottom ends of the two clamping plates. A first motor is fixedly installed at one end of the workbench, and the output end of the first motor is fixedly connected to one end of the second bidirectional screw.

[0007] Preferably, a rotating rod is rotatably mounted on the upper surfaces of the two clamping plates, a worm is fixedly mounted on the two rotating rods, a worm wheel is fixedly mounted on the bottom ends of the two threaded rods, and the worm wheel is engaged with the corresponding worm wheel.

[0008] Preferably, one side of the workbench is rotatably installed with a first driving shaft and a second driving shaft distributed up and down, and the first driving shaft and the second driving shaft are both inserted into one end of the two clamping plates, and one end of the workbench is fixedly installed with a third motor and a second motor distributed up and down, and the output ends of the third motor and the second motor are fixedly connected to one end of the first driving shaft and the second driving shaft respectively, and a third bevel gear and a first bevel gear distributed up and down are rotatably installed in one end of the two clamping plates, and the third bevel gear and the first bevel gear are slidably clamped on the first driving shaft and the second driving shaft respectively, one end of the two first bidirectional screws are fixedly installed with a second bevel gear, and the second bevel gear is meshed with the corresponding first bevel gear, and one end of the two rotating rods is fixedly installed with a fourth bevel gear, and the fourth bevel gear is meshed with the corresponding third bevel gear.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] 1. In the present invention, the two clamping plates can be slid close to each other according to the length of the workpiece to clamp the workpiece in the center. Then, according to the width of the workpiece, the first bidirectional screw is used to drive the corresponding two limit plates to slide close to each other to clamp and fix the workpiece in the center, thereby achieving the purpose of clamping and fixing workpieces according to different sizes.

[0011] 2. In the utility model, the threaded rod is used to drive the clamping plate to slide down along the slide groove according to the thickness of the workpiece, so that the clamping plate presses the workpiece, which can prevent the workpiece from changing position and vibrating due to cutting force, vibration of the CNC lathe, etc. during the processing, thereby ensuring processing accuracy and safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 This is a schematic diagram of the overall front structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 A schematic diagram of the structure at center A;

[0015] Figure 3 This is a schematic diagram of the overall back structure of the utility model;

[0016] Figure 4 For this utility model Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0017] In the figure: 1. workbench; 2. clamping plate; 3. limit plate; 4. first bidirectional lead screw; 5. slide groove; 6. pressing plate; 7. threaded rod; 8. rotating rod; 9. first drive shaft; 10. second drive shaft; 11. first motor; 12. second motor; 13. third motor; 14. worm; 15. worm gear; 16. second bidirectional lead screw; 17. first bevel gear; 18. second bevel gear; 19. third bevel gear; 20. fourth bevel gear. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0019] Example: Figure 1-4 As shown, the utility model provides a workpiece clamping mechanism for a CNC lathe, comprising a workbench 1, on which two clamping plates 2 distributed in a mirror image are slidably mounted, and two symmetrically distributed limit plates 3 are slidably mounted on the sides of the two clamping plates 2 that are close to each other, and a first bidirectional screw rod 4 is rotatably mounted in the two clamping plates 2, and the first bidirectional screw rod 4 is threadedly inserted in the corresponding two limit plates 3, and a slide groove 5 is fixedly mounted on the middle part of the upper surface of the two clamping plates 2, and a clamping plate 6 is slidably mounted on the sides of the two slide grooves 5 that are close to each other, and a threaded rod 7 is rotatably mounted in the two slide grooves 5, and the threaded rod 7 is threadedly inserted in the corresponding clamping plate 6, and the workbench 1 is the workbench 1 on a CNC lathe. First, the workpiece to be processed is placed on the workbench 1. The workpiece is placed on the workbench 1, and then the two clamping plates 2 are slid close to each other according to the length of the workpiece to clamp the workpiece in the center. Then, according to the width of the workpiece, the first bidirectional screw 4 is used to drive the corresponding two limit plates 3 to slide close to each other to clamp the workpiece in the center, thereby achieving the purpose of clamping and fixing the workpiece according to the size of the workpiece. Finally, according to the thickness of the workpiece, the threaded rod 7 is used to drive the clamping plate 6 to slide down along the slide groove 5, so that the clamping plate 6 presses the workpiece (the thickness of the workpiece needs to be greater than the height of the clamping plate 2), which can prevent the workpiece from changing position and vibrating due to cutting force, vibration of the CNC lathe, etc. during the processing, thereby ensuring processing accuracy and safe operation.

[0020] A second bidirectional screw rod 16 is rotatably installed in the workbench 1, and the second bidirectional screw rod 16 is threadedly inserted in the bottom ends of the two clamping plates 2. A first motor 11 is fixedly installed at one end of the workbench 1, and the output end of the first motor 11 is fixedly connected to one end of the second bidirectional screw rod 16.

[0021] By adopting the above technical solution, the first motor 11 is used to drive the second bidirectional screw 16 to rotate, and the second bidirectional screw 16 drives the two clamping plates 2 to slide closer to or away from each other.

[0022] A worm 14 is fixedly mounted on each of the two rotating rods 8 , and a worm wheel 15 is fixedly mounted on the bottom end of each of the two threaded rods 7 , and the worm wheel 15 is meshed with the corresponding worm 14 .

[0023] By adopting the above technical solution, the rotating rod 8 drives the worm 14 to rotate, the worm 14 drives the worm wheel 15 to rotate, and the worm wheel 15 drives the threaded rod 7 to rotate.

[0024] One side of the workbench 1 is rotatably installed with a first drive shaft 9 and a second drive shaft 10 distributed up and down, and the first drive shaft 9 and the second drive shaft 10 are both inserted into one end of the two clamping plates 2, and one end of the workbench 1 is fixedly installed with a third motor 13 and a second motor 12 distributed up and down, and the output ends of the third motor 13 and the second motor 12 are fixedly connected to one end of the first drive shaft 9 and the second drive shaft 10 respectively, and one end of the two clamping plates 2 is rotatably installed with a third bevel gear 19 and a first bevel gear 17 distributed up and down, and the third bevel gear 19 and the first bevel gear 17 are respectively slidably clamped on the first drive shaft 9 and the second drive shaft 10, one end of the two first bidirectional screws 4 is fixedly installed with a second bevel gear 18, and the second bevel gear 18 is meshed with the corresponding first bevel gear 17, and one end of the two rotating rods 8 is fixedly installed with a fourth bevel gear 20, and the fourth bevel gear 20 is meshed with the corresponding third bevel gear 19.

[0025] By adopting the above-mentioned technical solution, the clamping plate 2 can slide along the first drive shaft 9 and the second drive shaft 10, and the second motor 12 is used to drive the second drive shaft 10 to rotate, and the second drive shaft 10 drives the first bevel gear 17 to rotate, and the first bevel gear 17 drives the first bidirectional screw 4 to rotate through the second bevel gear 18, and the third motor 13 is used to drive the first drive shaft 9 to rotate, and the first drive shaft 9 drives the third bevel gear 19 to rotate, and the third bevel gear 19 drives the rotating rod 8 to rotate through the fourth bevel gear 20.

[0026] Working principle: When the utility model is in use, the workpiece to be processed is first placed on the workbench 1, and then according to the length of the workpiece, the first motor 11 is used to drive the second bidirectional screw 16 to rotate, and the second bidirectional screw 16 drives the two clamping plates 2 to slide close to each other to clamp the workpiece in the center, and then according to the width of the workpiece, the second motor 12 is used to drive the second drive shaft 10 to rotate, and the second drive shaft 10 drives the first bevel gear 17 to rotate, and the first bevel gear 17 drives the first bidirectional screw 4 to rotate through the second bevel gear 18, and the first bidirectional screw 4 drives the corresponding two limit plates 3 to slide close to each other to clamp and fix the workpiece in the center, thereby achieving the purpose of clamping and fixing workpieces according to their sizes;

[0027] Finally, according to the thickness of the workpiece, the third motor 13 is used to drive the first drive shaft 9 to rotate, the first drive shaft 9 drives the third bevel gear 19 to rotate, the third bevel gear 19 drives the rotating rod 8 to rotate through the fourth bevel gear 20, the rotating rod 8 drives the worm 14 to rotate, the worm 14 drives the worm wheel 15 to rotate, the worm wheel 15 drives the threaded rod 7 to rotate, and the threaded rod 7 drives the clamping plate 6 to slide down along the slide groove 5, so that the clamping plate 6 presses the workpiece, which can prevent the workpiece from changing position and vibrating due to cutting force, vibration of the CNC lathe, etc. during the processing, thereby ensuring processing accuracy and safe operation.

[0028] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A workpiece clamping mechanism for a CNC lathe, comprising a workbench (1), characterized in that: Two mirror-distributed clamping plates (2) are slidably mounted on the workbench (1); two symmetrically distributed limit plates (3) are slidably mounted on the sides of the two clamping plates (2) that are close to each other; a first bidirectional screw rod (4) is rotatably mounted in the two clamping plates (2), and the first bidirectional screw rod (4) is threadedly inserted in the corresponding two limit plates (3); a sliding groove (5) is fixedly mounted in the middle of the upper surface of the two clamping plates (2); a clamping plate (6) is slidably mounted on the sides of the two sliding grooves (5) that are close to each other; a threaded rod (7) is rotatably mounted in the two sliding grooves (5), and the threaded rod (7) is threadedly inserted in the corresponding clamping plate (6).

2. A workpiece clamping mechanism for a CNC lathe according to claim 1, characterized in that: A second bidirectional screw rod (16) is rotatably mounted in the workbench (1), and the second bidirectional screw rod (16) is threadedly inserted into the bottom ends of the two clamping plates (2).

3. A workpiece clamping mechanism for a CNC lathe according to claim 1, characterized in that: A first motor (11) is fixedly mounted on one end of the workbench (1), and an output end of the first motor (11) is fixedly connected to one end of a second bidirectional screw rod (16).

4. A workpiece clamping mechanism for a CNC lathe according to claim 1, characterized in that: A rotating rod (8) is rotatably mounted on the upper surfaces of the two clamping plates (2), and a worm (14) is fixedly mounted on the two rotating rods (8).

5. The workpiece clamping mechanism for a CNC lathe according to claim 1, wherein: A worm gear (15) is fixedly mounted on the bottom ends of the two threaded rods (7), and the worm gear (15) is meshed with the corresponding worm (14).

6. A workpiece clamping mechanism for a CNC lathe according to claim 1, characterized in that: A first drive shaft (9) and a second drive shaft (10) are rotatably mounted on one side of the workbench (1), and the first drive shaft (9) and the second drive shaft (10) are both inserted into one end of the two clamping plates (2). A third motor (13) and a second motor (12) are fixedly mounted on one end of the workbench (1), and the output ends of the third motor (13) and the second motor (12) are fixedly connected to one end of the first drive shaft (9) and the second drive shaft (10), respectively.

7. A workpiece clamping mechanism for a CNC lathe according to claim 1, characterized in that: A third bevel gear (19) and a first bevel gear (17) are rotatably mounted in one end of each of the two clamping plates (2), and the third bevel gear (19) and the first bevel gear (17) are slidably mounted on the first drive shaft (9) and the second drive shaft (10), respectively.

8. A workpiece clamping mechanism for a CNC lathe according to claim 4, characterized in that: One end of each of the two first bidirectional screw rods (4) is fixedly mounted with a second bevel gear (18), and the second bevel gear (18) is meshed with the corresponding first bevel gear (17); one end of each of the two rotating rods (8) is fixedly mounted with a fourth bevel gear (20), and the fourth bevel gear (20) is meshed with the corresponding third bevel gear (19).

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