High-stability numerical control lathe workpiece positioning device

Abstract

The utility model discloses a high-stability numerical control lathe workpiece positioning device, and belongs to the field of numerical control lathes. The high-stability numerical control lathe workpiece positioning device comprises a chuck base, three guide strips are evenly distributed in the chuck base in a surrounding mode, a clamping block is welded to one side of each guide strip, and a first anti-skid piece is arranged in the middle of the lower end of each clamping block. The workpiece positioning device solves the problems that when a workpiece positioning device of an existing numerical control lathe is used for clamping a material to be machined, the workpiece positioning device can only be tangent to the surface of the cylindrical material to be machined in the process of making contact with and clamping the cylindrical material to be machined, the contact area is small, and the material to be machined is prone to slipping. After the first anti-skid piece is in contact with a material to be clamped, rotation of the threaded rod can push the anti-skid block to extend out of the clamping block, and the first anti-skid piece is assisted in making contact with and clamping the material after extending out of the clamping block.

Description

Technical Field

[0001] This utility model relates to the field of CNC lathes, specifically a highly stable CNC lathe workpiece positioning device. Background Technology

[0002] The positioning device of a CNC lathe plays a crucial role in the field of CNC lathe machining. It aims to achieve precise positioning and stable clamping of the workpiece within the machining area. This device is not only related to whether the workpiece can remain motionless under the high-speed rotating tool, but also directly affects the machining accuracy and surface quality of the final product. The positioning device of a CNC lathe is not only an indispensable and important component in CNC lathe machining, but also a key factor in improving machining efficiency and ensuring product quality.

[0003] Chinese patent CN213317773U discloses a workpiece positioning device for a CNC lathe, including a base, a turntable, a chuck seat, multiple chucks, and clamping blocks. The turntable is fixedly mounted on the base, and the chuck seat is positioned above the turntable, with its outer ring fixedly connected to the base. The size of the clamping holes is adjusted by the sliding cooperation between the chucks and the chuck seat, which can meet the clamping requirements of workpieces of different sizes. Furthermore, the guide strip of the clamping block slides with the guide groove on the chuck, improving the movement and clamping stability of the clamping block and enhancing the positioning accuracy of the workpiece.

[0004] When the workpiece positioning device of the aforementioned patented CNC lathe clamps the material to be processed, it can only be tangent to the surface of the cylindrical material to be processed during the contact and clamping process. The contact area is low, which makes it easy for the material to be processed to slip. Utility Model Content

[0005] The purpose of this invention is to provide a highly stable CNC lathe workpiece positioning device. After the first anti-slip plate contacts the material to be clamped, the rotation of the threaded rod can push the anti-slip block to extend out from the clamping block, extending and assisting the first anti-slip plate in contacting and clamping the material, thus solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a highly stable CNC lathe workpiece positioning device, comprising a chuck base, wherein three guide strips are evenly distributed around the inside of the chuck base, a clamping block is welded to one side of each guide strip, a first anti-slip plate is provided at the middle position of the lower end of the clamping block, and a receiving groove is provided at both the front and rear ends of the first anti-slip plate, an anti-slip block is provided inside the receiving groove, and a threaded rod is provided at the upper end of the two anti-slip blocks inside the clamping block, and the outer surface of the threaded rod engages with the internal thread of the anti-slip block.

[0007] Preferably, a sliding rail is recessed on one side of the storage groove, and the anti-sliding block is embedded in the sliding rail and slidably connected to the inside of the sliding rail.

[0008] Preferably, a second gear is welded to the upper end of the threaded rod, a first gear is provided between the two threaded rods, and the outside of the first gear is meshed with the outside of the second gear. A handle is provided at the upper end of the clamping block, and the handle passes through the clamping block and is welded and fixed to the first gear.

[0009] Preferably, a paddle is provided on one side of the outside of the handle.

[0010] Preferably, the paddle extends toward the interior of the clamping block and is provided with a sliding block, and the exterior of the sliding block is slidably connected to the interior of the clamping block.

[0011] Preferably, the front end of the paddle is provided with a limiting piece, and the limiting piece is rotatably connected to the clamping block via a connecting shaft.

[0012] Preferably, a spring is provided laterally inside the sliding block, and the two ends of the spring are welded and fixed to the lever and the clamping block, respectively.

[0013] Preferably, the side of the limiting piece facing the lever is provided with a second anti-slip piece, and the second anti-slip piece is bonded and fixed to the limiting piece with adhesive.

[0014] Preferably, a first anti-slip strip is provided on both sides of the outer side of the limiting piece, and the first anti-slip strip is welded and fixed to the limiting piece.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The chuck seat of this invention features an annular spiral groove that meshes with the rack thread. After the material to be processed is clamped by three clamping blocks, the rotation of the handle can push the anti-slip block to extend from both sides of the first anti-slip plate. After the three first anti-slip plates clamp the material to be processed, the anti-slip block assists the first anti-slip plates, providing additional contact positions on both sides of the first anti-slip plate that contacts the material to be processed, increasing the contact area and thus improving stability. On the other hand, the rotation of the threaded rod can cause the anti-slip block to extend a corresponding distance. The anti-slip block extending a corresponding distance can handle materials of different diameters to be processed, further improving the protective effect and enhancing the stability of the CNC lathe workpiece positioning device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0018] Figure 2 This is a schematic diagram showing the positional relationship of the storage slots in this utility model;

[0019] Figure 3 This is a cross-sectional view of the internal structure of the clamping block of this utility model;

[0020] Figure 4 For the present utility model Figure 3 Enlarged view of a portion of region A in the middle;

[0021] Figure 5 This is a schematic diagram showing the positional relationship of the paddles in this utility model;

[0022] Figure 6 This is a cross-sectional view showing the positional relationship of the sliding blocks in this utility model;

[0023] Figure 7 This is a schematic diagram of the anti-slip block of this utility model after it has extended.

[0024] In the diagram: 1. Chuck base; 2. Guide bar; 3. Rack; 4. Clamping block; 5. First anti-slip plate; 6. Storage groove; 7. Anti-slip block; 8. Restricting plate; 9. Connecting shaft; 10. First anti-slip strip; 11. Handle; 12. Second anti-slip strip; 13. Paddle; 14. First gear; 15. Second gear; 16. Threaded rod; 17. Sliding rail; 18. Second anti-slip plate; 19. Sliding block. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments.

[0026] Example 1

[0027] like Figure 1 and Figure 7 As shown, this embodiment of a highly stable CNC lathe workpiece positioning device includes a chuck seat 1. Three guide bars 2 are evenly distributed around the inside of the chuck seat 1, and the outside of the guide bars 2 is embedded in the inside of the chuck seat 1 and slidably connected to the inside of the chuck seat 1. The three guide bars 2 slide inside the chuck seat 1 and move toward the center position of the chuck seat 1 to clamp the material. A rack 3 is provided on one side of the guide bar 2 facing the inside of the chuck seat 1, and the rack 3 is welded and fixed to the guide bar 2. The rotation of the annular spiral groove inside the chuck seat 1 can generate a threaded engagement with the rack 3, and the rotation of the annular spiral groove can push the guide bar 2 to move laterally to clamp the material. Referring to the Chinese patent with authorization announcement number CN213317773U, a workpiece positioning device for a CNC lathe, that application describes in detail that the rotation of the annular spiral groove can contact the rack, and after contacting the rack and engaging with the rack, it can move laterally. That application is prior art compared to this application, so the transmission of the rack 3 is not described in detail in this application.

[0028] Among them, such as Figure 2As shown, a clamping block 4 is provided on one side of the guide strip 2, and the clamping block 4 is welded and fixed to the guide strip 2. A first anti-slip piece 5 is provided at the middle position of the lower end of the clamping block 4. The stability after clamping can be improved by sticking the first anti-slip piece 5 to the middle of the lower end of the clamping block 4. Both the front and rear ends of the first anti-slip piece 5 are recessed with a storage groove 6, and the storage groove 6 is recessed inside the clamping block 4. An anti-slip block 7 is provided inside the storage groove 6. The anti-slip block 7 extends out from the storage groove 6 and assists the first anti-slip piece 5 in contacting the material to be clamped.

[0029] In addition, such as Figure 3 As shown, threaded rods 16 are provided at the upper ends of the two anti-slider blocks 7 inside the clamping block 4, and the external threads of the threaded rods 16 are engaged with the internal threads of the anti-slider blocks 7. When the threaded rods 16 rotate, they can engage with the internal threads of the anti-slider blocks 7. A sliding rail 17 is recessed on one side inside the storage groove 6, and the anti-slider blocks 7 are embedded in the sliding rail 17 and slidably connected to the inside of the sliding rail 17. After the threaded rods 16 rotate and generate relative movement, the restriction of the sliding rail 17 will cause the anti-slider blocks 7 to change from rotational movement to lateral linear movement, so that the anti-slider blocks 7 extend out of the storage groove 6.

[0030] like Figure 5 As shown, in order to uniformly drive the anti-slip blocks 7 on both sides inside the clamping block 4, a second gear 15 is welded to the upper end of the threaded rod 16, a first gear 14 is provided between the two threaded rods 16, and the outside of the first gear 14 is meshed with the outside of the second gear 15. A handle 11 is provided at the upper end of the clamping block 4, and the handle 11 passes through the clamping block 4 and is welded and fixed to the first gear 14. By rotating the handle 11, the first gear 14 can be driven to rotate, and the rotation of the first gear 14 can drive the threaded rod 16 to rotate through the second gear 15.

[0031] Among them, such as Figure 6 As shown, a paddle 13 is provided on one side of the handle 11. The paddle 13 fits against the handle 11 to limit the restriction of the handle 11 and improve the stability of the longitudinal horizontal position adjustment of the anti-slip block 7. A sliding block 19 is provided extending from the paddle 13 toward the inside of the clamping block 4. The outside of the sliding block 19 is slidably connected to the inside of the clamping block 4. The sliding block 19 slides in the clamping block 4 to fit against and limit the handle 11.

[0032] To prevent the paddle 13 from wobbling when the clamping block 4 rotates, a limiting piece 8 is provided at the front end of the paddle 13. The limiting piece 8 is rotatably connected to the clamping block 4 through a connecting shaft 9. After the limiting piece 8 rotates around the connecting shaft 9, it can fit and limit the paddle 13.

[0033] The sliding block 19 has a spring arranged horizontally inside. The two ends of the spring are welded and fixed to the paddle 13 and the clamping block 4 respectively. The spring's elasticity can actively move the paddle 13 toward the handle 11.

[0034] To facilitate the operation of the paddle 13, a second anti-slip strip 12 is provided on the side of the paddle 13 facing the handle 11. To facilitate the operation of the limiting piece 8, a first anti-slip strip 10 is provided on both sides of the outer side of the limiting piece 8, and the first anti-slip strip 10 is welded and fixed to the limiting piece 8. The protruding first anti-slip strip 10 facilitates the rotation and position adjustment of the limiting piece 8.

[0035] Among them, such as Figure 4 As shown, a second anti-slip piece 18 is provided on the side of the limiting piece 8 facing the lever 13, and the second anti-slip piece 18 is bonded and fixed to the limiting piece 8 with glue. The second anti-slip piece 18 can increase the coefficient of friction and improve the adhesion between the limiting piece 8 and the lever 13 as the limiting piece 8 rotates and adheres to the lever 13.

[0036] Working principle: When using the device and clamping the material to be processed, the annular spiral groove inside the chuck seat 1 rotates and engages with the rack 3 through a thread. The restriction of the guide bars 2 by the chuck seat 1 causes the chuck seat 1 to change from rotational motion to lateral linear motion. The three guide bars 2 drive the clamping blocks 4 to move synchronously toward the center of the chuck seat 1 and clamp the material to be processed. After the first anti-slip plate 5 contacts the material to be processed, initial clamping is achieved. Pulling the lever 13 rotates the handle 11. The rotation of the handle 11 directly drives the first gear 14 to rotate. The rotation of the first gear 14 drives the threaded rod 16 to rotate through the second gear 15. The rotation of 6 generates relative motion with the interior of the anti-slip block 7, causing the anti-slip block 7 to slide laterally along the sliding rail 17 inside the receiving groove 6. The anti-slip block 7 extends and contacts the two sides of the first anti-slip plate 5 that are in contact with the processing material, adapting to different diameter processing materials and increasing the coefficient of friction, thereby improving the stability of the CNC lathe workpiece positioning device. When the rotation of the lever 13 stops, the spring will pull the lever 13, and the lever 13 will slide towards the inside of the clamping block 4 through the sliding block 19. The lever 13 will be in close contact with the handle 11. The limiting plate 8 rotates around the connecting shaft 9 as the center, and the limiting plate 8 fits against the lever 13 to fix the lever 13, so that the lever 13 is in close contact with the handle 11.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A high-stability workpiece positioning device for a numerical control lathe, comprising a chuck holder (1), characterized in that The inside of the chuck seat (1) is evenly distributed with three guide strips (2), one side of the guide strip (2) is welded with a clamping block (4), the middle position of the lower end of the clamping block (4) is provided with a first anti-skid piece (5), the front and rear ends of the first anti-skid piece (5) are recessed with receiving grooves (6), the inside of the receiving groove (6) is provided with an anti-skid block (7), the upper end of the two anti-skid blocks (7) outside the clamping block (4) is provided with a threaded rod (16), and the outer threaded rod (16) is screwed with the inner anti-skid block (7).

2. A high stability workpiece positioning device for a CNC lathe according to claim 1, wherein, The inside of the receiving groove (6) is recessed on one side and provided with a sliding rail (17), and the anti-skid block (7) is embedded in the inside of the sliding rail (17) and connected with the inside of the sliding rail (17).

3. A high stability workpiece positioning device for a CNC lathe as claimed in claim 2, wherein, The upper end of the threaded rod (16) is welded with a second gear (15), and the first gear (14) is provided between the two threaded rods (16), and the outer first gear (14) is engaged with the outer second gear (15), the upper end of the clamping block (4) is provided with a handle (11), and the handle (11) penetrates the clamping block (4) and is welded with the first gear (14).

4. The workpiece positioning device of claim 3, wherein the workpiece positioning device is configured to be mounted on a CNC lathe. One side of the outer handle (11) is provided with a dial piece (13).

5. A high stability workpiece positioning device for a CNC lathe as claimed in claim 4, wherein, The dial piece (13) extends towards the inside of the clamping block (4) and is provided with a sliding block (19), and the outer sliding block (19) is connected with the inside of the clamping block (4).

6. A high stability workpiece positioning device for a CNC lathe as claimed in claim 5, wherein, The front end of the dial piece (13) is provided with a limiting piece (8), and the limiting piece (8) and the clamping block (4) are rotatably connected through a connecting shaft (9).

7. A high stability workpiece positioning device for a CNC lathe as claimed in claim 6, wherein, The inside of the sliding block (19) is transversely provided with a spring, and the two ends of the spring are respectively welded with the dial piece (13) and the clamping block (4).

8. A high stability workpiece positioning device for a CNC lathe as claimed in claim 7, wherein, One side of the limiting piece (8) is provided with a second anti-skid piece (18), and the second anti-skid piece (18) and the limiting piece (8) are fixed by glue.

9. A high stability workpiece positioning device for a CNC lathe as claimed in claim 8, wherein, Both sides of the outer limiting piece (8) are provided with a first anti-skid strip (10), and the first anti-skid strip (10) and the limiting piece (8) are welded.

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