Centering and clamping mechanism of numerical control milling machine

Abstract

The utility model discloses a numerical control milling machine centering clamping mechanism which comprises a parallel jaw vice and a chuck, the parallel jaw vice comprises a base and a pair of jaws, the chuck comprises a chuck body, a third sliding groove is formed in the lower end of the chuck body, a pair of sliding blocks are installed in the third sliding groove in a sliding mode, inserting plates are arranged at the lower ends of the pair of sliding blocks respectively, and the inserting plates are connected with the base. A pair of jaws are arranged on the upper portion of the chuck body, the pair of jaws are provided with inserting grooves, the inserting plate is inserted into the inserting grooves, a pair of first jaws and a pair of second jaws are arranged on the upper portion of the chuck body, and a centering transmission mechanism is connected between the first jaws and the sliding block and between the second jaws and the sliding block. When the chuck is combined with the parallel jaw vice and the jaw of the parallel jaw vice moves, the jaw can enable the first jaw claw and the second jaw claw of the chuck to be centered and clamped through the inserting plate and the centering transmission mechanism, so that the device has the clamping functions of the chuck and the parallel jaw vice at the same time, and convenient switching of the functions of the two clamps is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of milling machine fixtures, and particularly relates to a centering clamping mechanism for a numerical control milling machine. Background Technique

[0002] The fixtures of numerical control milling machines are mainly divided into two types. One is a vise. The base of the vise is fixed on the workbench of the milling machine, and the workpiece is clamped and fixed on the jaws of the vise. The vise is generally suitable for machining square workpieces.

[0003] The other is a chuck, which can clamp circular workpieces such as a water pump housing. For example, the utility model patent with the publication number of CN218696222U discloses a fixed chuck for a water pump housing of a numerical control milling machine, including a chuck body, three chucks, three cushion posts and a driving mechanism. The driving mechanism is arranged inside the chuck body. Three sliding grooves are uniformly arranged along the radial direction on the upper surface of the chuck body. The three chucks are respectively arranged in the three sliding grooves. Three through holes are uniformly arranged on the chuck. The cushion posts are arranged in the through holes of the chuck. The driving mechanism drives the chucks to clamp the water pump housing, and the cushion posts hold the water pump housing so that it does not move and is firmly fixed on the chuck.

[0004] However, in actual use, the above two types of fixtures are usually not universal. When machining different types of workpieces with a numerical control milling machine, different fixtures need to be replaced or a numerical control milling machine equipped with the corresponding fixture needs to be used, which is rather cumbersome to operate or increases the idle rate of the equipment. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a centering clamping mechanism for a numerical control milling machine, which solves the problem that the vise fixture and the chuck of the numerical control milling machine in the prior art cannot be universal.

[0006] To achieve the above purposes, the utility model is realized through the following technical solutions: A centering clamping mechanism for a numerical control milling machine includes a vise and a chuck. The above vise includes a base and a pair of jaws. The pair of jaws are slidably installed on the base. A double-headed threaded rod is rotatably installed on the base. The double-headed threaded rod is threadedly connected with the pair of jaws. The chuck includes a body. A third sliding groove is provided at the lower end of the body. A pair of sliders are slidably installed in the third sliding groove. Plug plates are provided at the lower ends of the pair of sliders. Slots are provided on the pair of jaws. The plug plates are inserted into the slots. A pair of first clamping jaws and a pair of second clamping jaws are provided at the upper part of the body. A centering transmission mechanism is connected between the first clamping jaws, the second clamping jaws and the sliders.

[0007] Preferably, the thread leads at both ends of the double-headed threaded rod are equal and the helix directions are opposite. One end of the double-headed threaded rod is connected with a handle.

[0008] Preferably, a first chute and a second chute are provided on the upper part of the disc body. The first chute and the second chute are arranged in a cross shape. A pair of the first clamping jaws are slidably connected to the first chute, and a pair of the second clamping jaws are slidably connected to the second chute.

[0009] Preferably, the centering transmission mechanism includes a first gear and a second gear rotatably installed in the disc body. The installation axes of the first gear and the second gear are perpendicular to each other. A first bevel gear is coaxially connected to the first gear. The first bevel gear meshes with a second bevel gear. A third rack is connected to the upper part of the slider. The lower part of the third rack meshes with the first gear. A first rack is connected to the lower part of the first clamping jaw. A second rack is connected to the lower part of the second clamping jaw. The lower part of the first rack meshes with the first gear. The lower part of the second rack meshes with the second gear.

[0010] Preferably, the first gear and the second gear have the same number of teeth and the same module, and the first bevel gear and the second bevel gear have the same number of teeth and the same module.

[0011] Beneficial effects

[0012] The utility model provides a centering clamping mechanism for a numerical control milling machine, which has the following beneficial effects:

[0013] The chuck and the parallel jaw vice of the present device can be combined or separated through the combination of the insertion plate and the slot. When the chuck and the parallel jaw vice are combined, when the jaw is moved by rotating the double-headed screw of the parallel jaw vice, the jaw can make the first clamping jaw and the second clamping jaw of the chuck centering and clamping through the insertion plate and the centering transmission mechanism. Therefore, the present device has the clamping functions of both the chuck and the parallel jaw vice at the same time, realizing the convenient switching of the functions of the two jigs. Description of the drawings

[0014] Figure 1 It is the front sectional view of the utility model.

[0015] Figure 2 It is the top view of the chuck of the utility model.

[0016] Figure 3 It is the bottom view of the chuck of the utility model.

[0017] Figure 4 It is the schematic diagram of the centering transmission mechanism inside the chuck of the utility model.

[0018] Figure 5 It is the schematic diagram of the jaw and slot structure of the utility model.

[0019] In the figure: 1. Base; 2. Jaw; 3. Double-headed threaded rod; 4. Handle; 5. Insert plate; 6. Third rack; 7. First gear; 8. First rack; 9. First jaw; 10. First chute; 11. Disc body; 12. Third chute; 13. Second jaw; 14. Second rack; 15. First bevel gear; 16. Second bevel gear; 17. Second gear; 18. Second chute; 19. Slide block; 20. Slot. Specific implementation manner

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1-5 , the present invention provides a technical solution: a centering clamping mechanism for a numerical control milling machine, including a parallel jaw vice and a chuck. The parallel jaw vice includes a base 1 and a pair of jaws 2. The pair of jaws 2 are slidably installed on the base 1. A double-headed threaded rod 3 is rotatably installed on the base 1. The double-headed threaded rod 3 is threadedly connected to the pair of jaws 2. The chuck includes a disc body 11. A third chute 12 is provided at the lower end of the disc body 11. A pair of slide blocks 19 are slidably installed in the third chute 12. Insert plates 5 are provided at the lower ends of the pair of slide blocks 19. Slots 20 are provided on the pair of jaws 2. The insert plates 5 are inserted into the slots 20. A pair of first jaws 9 and a pair of second jaws 13 are provided at the upper part of the disc body 11. A centering transmission mechanism is connected between the first jaws 9, the second jaws 13 and the slide blocks 19;

[0022] When using the parallel jaw vice as a clamping tool for a numerical control milling machine, separate the chuck from the parallel jaw vice, rotate the double-headed threaded rod 3 to make the pair of jaws 2 move towards each other, thereby clamping the workpiece. When using the chuck as a clamping tool for a numerical control milling machine, insert the insert plate 5 at the lower end of the chuck into the slot 20 of the jaw 2, rotate the double-headed threaded rod 3 to make the pair of jaws 2 drive the slide blocks 19 to move through the insert plates 5, and the slide blocks 19 drive the first jaws 9 and the second jaws 13 to move through the centering transmission mechanism to clamp the workpiece.

[0023] Further, the thread leads at both ends of the double-headed threaded rod 3 are equal and the helix directions are opposite. One end of the double-headed threaded rod 3 is connected to a handle 4;

[0024] Through the setting of the above technical solution, it can be realized that when the double-headed threaded rod 3 is rotated, the moving speeds of the pair of jaws 2 are the same, thereby realizing the centering clamping of the workpiece.

[0025] Further, a first sliding groove 10 and a second sliding groove 18 are provided on the upper part of the disk body 11. The first sliding groove 10 and the second sliding groove 18 are arranged in a cross shape. A pair of the first clamping jaws 9 are slidably connected to the first sliding groove 10, and a pair of the second clamping jaws 13 are slidably connected to the second sliding groove 18;

[0026] Further, the centering transmission mechanism includes a first gear 7 and a second gear 17 rotatably installed in the disk body 11. The installation axes of the pair of first gears 7 and the pair of second gears 17 are perpendicular to each other. A first bevel gear 15 is coaxially connected to the first gear 7. The first bevel gear 15 meshes with a second bevel gear 16. A third rack 6 is connected to the upper part of the slider 19. The lower part of the third rack 6 meshes with the first gear 7. A first rack 8 is connected to the lower part of the first clamping jaw 9. A second rack 14 is connected to the lower part of the second clamping jaw 13. The lower part of the first rack 8 meshes with the first gear 7. The lower part of the second rack 14 meshes with the second gear 17;

[0027] When the double-headed threaded rod 3 is rotated to move a pair of clamping jaws 2 away from each other, the pair of clamping jaws 2 drive the slider 19 to move in the third sliding groove 12 through the insertion plate 5. The third rack 6 on the upper part of the slider 19 drives a pair of first gears 7 to rotate. The first gear 7 drives a pair of first clamping jaws 9 to approach each other in the first sliding groove 10 through the first rack 8. At the same time, the first gear 7 drives the second gear 17 to rotate through the first bevel gear 15 and the second bevel gear 16. The second gear 17 drives a pair of second clamping jaws 13 to approach each other in the second sliding groove 18 through the second rack 14, and then the workpiece is clamped by the pair of first clamping jaws 9 and the pair of second clamping jaws 13.

[0028] Further, the number of teeth and the module of the first gear 7 and the second gear 17 are the same, and the number of teeth and the module of the first bevel gear 15 and the second bevel gear 16 are the same;

[0029] Through the setting of the above technical solution, when the double-headed threaded rod 3 is rotated, the moving speeds of a pair of first clamping jaws 9 and a pair of second clamping jaws 13 can be the same, so as to realize the centering clamping of the workpiece.

[0030] Embodiment: When using a bench vise as a clamping tool for a CNC milling machine, separate the chuck from the bench vise. Rotate the double-headed threaded rod 3 through the handle 4 to make a pair of jaws 2 move towards each other, thereby clamping the workpiece. When using the chuck as a clamping tool for the CNC milling machine, insert the insertion plate 5 at the lower end of the chuck into the slot 20 of the jaw 2, rotate the double-headed threaded rod 3 to make a pair of jaws 2 move away from each other. The pair of jaws 2 drive the slider 19 to move in the third chute 12 through the insertion plate 5. The third rack 6 on the upper part of the slider 19 drives a pair of first gears 7 to rotate. The first gear 7 drives a pair of first jaws 9 to move closer to each other in the first chute 10 through the first rack 8. At the same time, the first gear 7 drives the second gear 17 to rotate through the first bevel gear 15 and the second bevel gear 16. The second gear 17 drives a pair of second jaws 13 to move closer to each other in the second chute 18, thereby clamping the workpiece through a pair of first jaws 9 and a pair of second jaws 13.

[0031] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centering and clamping mechanism for a CNC milling machine, characterized in that: It includes a parallel-jaw vice and a chuck. The above-mentioned parallel-jaw vice includes a base (1) and a pair of jaws (2). The pair of jaws (2) are slidably installed on the base (1). A double-headed threaded rod (3) is rotatably installed on the base (1). The double-headed threaded rod (3) is threadedly connected to the pair of jaws (2). The chuck includes a disc body (11). A third chute (12) is provided at the lower end of the disc body (11). A pair of sliders (19) are slidably installed in the third chute (12). Plug plates (5) are provided at the lower ends of the pair of sliders (19). Slots (20) are provided on the pair of jaws (2). The plug plates (5) are inserted into the slots (20). A pair of first clamping jaws (9) and a pair of second clamping jaws (13) are provided at the upper part of the disc body (11). A centering transmission mechanism is connected between the first clamping jaws (9), the second clamping jaws (13) and the sliders (19).

2. The centering clamping mechanism of a numerically controlled milling machine according to claim 1, characterized in that: The thread leads at both ends of the double-headed threaded rod (3) are equal and the helix directions are opposite. One end of the double-headed threaded rod (3) is connected with a handle (4).

3. The centering and clamping mechanism of a numerically controlled milling machine according to claim 1, characterized in that: A first chute (10) and a second chute (18) are provided at the upper part of the disc body (11). The first chute (10) and the second chute (18) are arranged in a cross shape. The pair of first clamping jaws (9) are slidably connected to the first chute (10). The pair of second clamping jaws (13) are slidably connected to the second chute (18).

4. The centering and clamping mechanism of a CNC milling machine according to claim 1, characterized in that: The centering transmission mechanism includes a first gear (7) and a second gear (17) rotatably installed in the disc body (11). The installation axes of the first gear (7) and the second gear (17) are perpendicular to each other. A first bevel gear (15) is coaxially connected to the first gear (7). The first bevel gear (15) meshes with a second bevel gear (16). A third rack (6) is connected to the upper part of the slider (19). The lower part of the third rack (6) meshes with the first gear (7). A first rack (8) is connected to the lower part of the first clamping jaw (9). A second rack (14) is connected to the lower part of the second clamping jaw (13). The lower part of the first rack (8) meshes with the first gear (7). The lower part of the second rack (14) meshes with the second gear (17).

5. The centering and clamping mechanism of a CNC milling machine according to claim 4, characterized in that: The number of teeth and the module of the first gear (7) and the second gear (17) are the same. The number of teeth and the module of the first bevel gear (15) and the second bevel gear (16) are the same.

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