Positioning clamp for numerical control machine tool

Abstract

The utility model discloses a positioning fixture for a numerical control machine tool, and relates to the technical field of machine tool fixtures, the positioning fixture for the numerical control machine tool comprises a numerical control machine tool, the numerical control machine tool comprises a base, a locking support is fixedly connected to the base, and a workpiece converter is movably connected above the locking support. The workpiece converter is movably connected with two sets of clamping assemblies, and each set of clamping assembly comprises four symmetrically-arranged workpiece clamping sliding bases. The workpiece converter comprises a rotary workbench, and a dovetail groove and a sliding groove which are symmetrically formed are formed in the rotary workbench; according to the utility model, the servo motor drives the rotary working table to rotate through the transmission connection between the driving bevel gear and the driven bevel gear so as to convert workpieces, so that a worker can conveniently take and place the workpieces, and the machine tool can still machine another workpiece in the process of taking the workpieces, so that the machining efficiency is improved.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of machine tool fixtures, in particular to a positioning fixture for numerically controlled machine tools. Background Art

[0002] CNC machine tool is the abbreviation of digitally controlled machine tool. It is an automated machine tool equipped with a program control system. During processing, the workpiece needs to be placed on the workbench and then positioned and clamped by the machine tool fixture on the workbench. The machine tool fixture can accurately determine the position of the workpiece relative to the tool and the machine tool. The positioning elements on the fixture, such as locating pins and locating blocks, can limit the degree of freedom of the workpiece so that the workpiece maintains the correct position during the processing. The cutting mechanism of the machine tool then cuts the workpiece.

[0003] However, in practice, people have noticed that when picking up a workpiece, the machine needs to be stopped for operation, and after stopping, the clamping structure needs to be loosened before the workpiece is picked up, and then the new workpiece is placed on the workbench, and then the clamp is tightened for clamping. The steps are cumbersome and take a long time. Moreover, the workpiece cannot be processed during this process, and it takes a long time to replace the workpiece, resulting in low efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a positioning fixture for CNC machine tools. By rotating the worktable, a workpiece can be removed and replaced while another workpiece is being processed without affecting the workpiece being processed, thereby improving processing efficiency. In addition, the workpiece clamping structure is located below the cutting mechanism, enabling automatic clamping and release of the workpiece, further facilitating workpiece manipulation. This solves the technical problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A positioning fixture for a CNC machine tool includes the CNC machine tool, the CNC machine tool including a base, a locking bracket fixedly connected to the base, a workpiece converter movably connected above the locking bracket, and two groups of clamping assemblies movably connected to the workpiece converter, each group of the clamping assemblies including four symmetrically arranged workpiece clamping slides;

[0007] The workpiece converter includes a rotary worktable, on which dovetail grooves and slide grooves are symmetrically arranged. There are two groups of slide grooves, and the slide grooves in each group are arranged in a rectangular array.

[0008] As a further technical solution of the present invention, a shaft is fixedly connected to the center position of the bottom of the rotary workbench, and a driven bevel gear is interference-fitted at the end of the shaft.

[0009] As a further technical solution of the present invention, the locking bracket includes a support seat fixedly connected to the base, the end of the support seat is integrally provided with a support boss, the end of the shaft rod passes through the inner side of the support boss, and the driven bevel gear is located at the bottom of the support seat.

[0010] As a further technical solution of the present invention, a clamping seat is symmetrically arranged between the support seat and the rotating workbench, a rectangular protrusion is integrally provided on the bottom of the clamping seat, and a rectangular slide groove corresponding to the rectangular protrusion is opened on the support seat, and the rectangular protrusion is slidably connected to the rectangular slide groove.

[0011] As a further technical solution of the present invention, each of the clamping seats is movably connected to a hinge plate at both ends, the hinge plate on the same side is movably connected at one end away from the clamping seat, and a connecting rod is inserted at the connection, and both sides of the connecting rod are movably connected to the end of the hinge plate away from the clamping seat.

[0012] As a further technical solution of the present invention, the bottom of the support seat is symmetrically fixedly connected to an electric cylinder, and the end of each electric cylinder is fixedly connected to an inclined slider, which is located between the support seat and the connecting rod;

[0013] The side surface of the inclined sliding block is fitted on the bottom of the supporting seat, the side of the inclined sliding block close to the connecting rod is tilted, and the inclined sliding block is fitted on the connecting rod.

[0014] As a further technical solution of the present invention, the workpiece clamping slide includes a dovetail-type slider slidingly connected to the inner side of the dovetail groove, and the bottom of the dovetail-type slider is integrally provided with an extension house, and the end of the extension house passes through the slide and extends between the two clamping seats.

[0015] As a further technical solution of the present invention, a T-shaped slot is provided in the dovetail-shaped slider, and a locking column is slidably connected to the inner side of the T-shaped slot, and the end of the locking column passes through the T-shaped slot and extends to the top of the L-shaped splint.

[0016] As a further technical solution of the present invention, an L-shaped clamping plate is placed above the dovetail-shaped slider, a through hole is opened at the end of the L-shaped clamping plate, and the end of the locking column passes through the through hole.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model drives the rotary table to rotate through the transmission connection between the active bevel gear and the driven bevel gear, thereby converting the workpiece, making it convenient for the staff to pick up and place the workpiece. In addition, the machine tool can still process another workpiece during the process of picking up the workpiece, thereby improving the processing efficiency. In addition, the distance from the cutting mechanism when picking up the workpiece is relatively far, thereby improving the safety during use.

[0019] In the utility model, the electric cylinder drives the tilting slide to move, the tilting slide drives the connecting rod to move, and the connecting rod drives the clamping seats on both sides to move closer to each other through the hinge plate, thereby driving the symmetrically arranged workpiece clamping slides to move closer to each other, thereby positioning and clamping the workpiece;

[0020] The utility model discloses that by loosening the locking column and adjusting the position of the L-shaped clamping plate on the dovetail slide block, the spacing between the two L-shaped clamping plates can be adjusted to clamp workpieces of different sizes, and the workpiece is automatically released after leaving from the bottom of the cutting spindle, making it easy to take the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model in use state.

[0022] Figure 2 This utility model Figure 1 Schematic diagram of the bottom structure.

[0023] Figure 3 This utility model Figure 1 Schematic diagram of part of the structure.

[0024] Figure 4 This utility model Figure 3 Schematic diagram of the bottom structure.

[0025] Figure 5 This utility model Figure 4 Schematic diagram of part of the structure.

[0026] Figure 6 This utility model Figure 5 A partial enlarged schematic diagram.

[0027] Figure 7 This utility model Figure 5 Another perspective of the picture.

[0028] Figure 8 This utility model Figure 7 A partial enlarged schematic diagram.

[0029] Figure 9 It is a three-dimensional structural diagram of the workpiece converter in the utility model.

[0030] Figure 10 This utility model Figure 9 Schematic diagram of the bottom structure.

[0031] Figure 11 It is a schematic diagram of the three-dimensional structure of the locking bracket in the utility model.

[0032] Figure 12 This utility model Figure 11Schematic diagram of the bottom structure.

[0033] Figure 13 It is a three-dimensional structural diagram of the dovetail-shaped slider in the utility model.

[0034] Figure 14 This utility model Figure 13 Schematic diagram of the bottom structure.

[0035] Figure 15 This utility model Figure 13 Top view of .

[0036] Figure 16 This utility model Figure 15 CC cross-sectional view.

[0037] Figure 17 It is a three-dimensional structural diagram of the L-shaped splint in the utility model.

[0038] Figure 18 It is a schematic diagram of the three-dimensional structure of the locking column in the utility model.

[0039] In the picture:

[0040] Base-1, lifting mechanism-2, slide box-3, driving mechanism-4, cutting spindle-5, workpiece converter-6, rotary worktable-61, dovetail groove-62, slide-63, shaft-64, driven bevel gear-65, locking bracket-7, support seat-71, clamping seat-72, hinge plate-73, connecting rod-74, supporting boss-75, rectangular slide-76, workpiece clamping slide-8, dovetail slider-81, L-shaped clamping plate-82, through hole-821, locking column-83, arc slider-831, threaded column-832, locking knob-833, extension stay-84, T-shaped slide-85, servo motor-9, active bevel gear-91, electric cylinder-10, connecting seat-101, tilting slider-11. DETAILED DESCRIPTION

[0041] 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.

[0042] See also Figure 1-18The embodiment of the utility model provides a positioning fixture for a CNC machine tool, including a CNC machine tool, the CNC machine tool including a base 1, a locking bracket 7 is fixedly connected to the base 1, a workpiece converter 6 is movably connected above the locking bracket 7, and two groups of clamping assemblies are movably connected to the workpiece converter 6, each group of the clamping assemblies includes four symmetrically arranged workpiece clamping slides 8;

[0043] The workpiece converter 6 includes a rotating worktable 61 , on which dovetail grooves 62 and slide grooves 63 are symmetrically arranged. There are two groups of slide grooves 63 , and each group of slide grooves 63 is arranged in a rectangular array.

[0044] In this embodiment, a shaft 64 is fixedly connected to the center of the bottom of the rotating workbench 61 , and a driven bevel gear 65 is interference-fitted at the end of the shaft 64 .

[0045] In this embodiment, the locking bracket 7 includes a support seat 71 fixedly connected to the base 1, and the end of the support seat 71 is integrally provided with a support boss 75, the end of the shaft 64 passes through the inner side of the support boss 75, and the driven bevel gear 65 is located at the bottom of the support seat 71.

[0046] In this embodiment, a clamping seat 72 is symmetrically provided between the support seat 71 and the rotating workbench 61. A rectangular protrusion is integrally provided on the bottom of the clamping seat 72, and a rectangular slide groove 76 corresponding to the rectangular protrusion is opened on the support seat 71. The rectangular protrusion is slidably connected to the rectangular slide groove 76.

[0047] In this embodiment, each of the clamping seats 72 is movably connected to a hinge plate 73 at both ends, the hinge plate 73 on the same side that is away from the clamping seat 72 is movably connected, and a connecting rod 74 is inserted at the connection, and both sides of the connecting rod 74 are movably connected to the end of the hinge plate 73 that is away from the clamping seat 72.

[0048] In this embodiment, the bottom of the support base 71 is symmetrically fixedly connected to the electric cylinder 10, and the end of each electric cylinder 10 is fixedly connected to the inclined slider 11, which is located between the support base 71 and the connecting rod 74;

[0049] The side surface of the tilted slider 11 is fitted on the bottom of the support seat 71 , and the side of the tilted slider 11 close to the connecting rod 74 is tilted, and the tilted slider 11 is fitted on the connecting rod 74 .

[0050] In this embodiment, the workpiece clamping slide 8 includes a dovetail-shaped slider 81 slidably connected to the inner side of the dovetail groove 62 , and an extension housing 84 is integrally provided at the bottom of the dovetail-shaped slider 81 , and the end of the extension housing 84 passes through the slide 63 and extends between the two clamping seats 72 .

[0051] In this embodiment, a T-shaped slot 85 is provided in the dovetail slider 81 , and a locking column 83 is slidably connected to the inner side of the T-shaped slot 85 . The end of the locking column 83 passes through the T-shaped slot 85 and extends to the top of the L-shaped clamping plate 82 .

[0052] In this embodiment, an L-shaped clamping plate 82 is placed above the dovetail-shaped slider 81 . A through hole 821 is formed at the end of the L-shaped clamping plate 82 , and an end of the locking column 83 passes through the through hole 821 .

[0053] By adopting the above technical solution, the workpiece is placed at the end above the rotary worktable 61, and the workpiece is located between each group of the workpiece clamping slides 8. Through the transmission connection between the active bevel gear 91 and the driven bevel gear 65, the servo motor 9 drives the rotary worktable 61 to rotate above the support seat 71, and the workpiece is rotated to the bottom of the cutting spindle 5. Then the output shaft of the electric cylinder 10 pushes the inclined slider 11 to move, and the inclined surface of the inclined slider 11 pushes the connecting rod 74 to move downward. The connecting rod 74 pulls the clamping seats 72 on both sides closer to each other through the hinge plate 73. The clamping seat 72 drives the dovetail slider 81 closer to each other by extending the house 84, and then the workpiece is positioned and clamped by the L-shaped clamping plate 82 on the dovetail slider 81. While the workpiece is being processed, the workpiece can be placed again at the other end of the rotary worktable 61, which does not affect the normal processing of the workpiece and improves the processing efficiency.

[0054] In this embodiment, a connecting seat 101 is fixedly connected to the electric cylinder 10 , and the electric cylinder 10 is fixedly connected to the supporting seat 71 by bolts via the connecting seat 101 .

[0055] In this embodiment, a spring is provided between the two clamping seats 72 , and the spring is located inside the rectangular slide groove 76 . The thrust of the spring can push the clamping seats 72 on both sides to move toward both sides, thereby achieving automatic reset.

[0056] In this embodiment, a servo motor 9 is fixedly connected to the end of the support base 71 . The servo motor 9 is located on the side of the shaft 64 , and the electric cylinders 10 are respectively located on both sides of the servo motor 9 .

[0057] In this embodiment, the end of the servo motor 9 is fixedly connected to a driving bevel gear 91, and the driving bevel gear 91 and the driven bevel gear 65 at the end of the shaft 64 are engaged with each other. Through the transmission cooperation between the driving bevel gear 91 and the driven bevel gear 65, the servo motor 9 drives the rotary worktable 61 to rotate, thereby converting the workpieces on both sides of the rotary worktable 61.

[0058] In this embodiment, the locking column 83 includes an arc-shaped slider 831 that is slidably connected to the inner bottom of the T-shaped slide 85. A threaded column 832 is integrally provided above the arc-shaped slider 831. The end of the threaded column 832 away from the arc-shaped slider 831 is threadedly connected to a locking knob 833. Loosen the locking knob 833, move the T-shaped slide 85, and make the arc-shaped slider 831 slide horizontally in the T-shaped slide 85, adjust the position of the L-shaped splint 82 on the dovetail slider 81, and increase the maximum spacing between the two dovetail sliders 81.

[0059] In this embodiment, the end of the threaded column 832 passes through the through hole 821, and the bottom of the locking knob 833 fits against the L-shaped clamp 82. By loosening the locking knob 833 and rotating the L-shaped clamp 82, the distance between the two L-shaped clamps 82 can be adjusted, further increasing the limit size of the clamp, and can clamp workpieces with a larger size span.

[0060] In this embodiment, a lifting mechanism 2 is provided on the side of the workpiece converter 6. The bottom of the lifting mechanism 2 is fixedly connected to the base 1. The side of the lifting mechanism 2 is movably connected to a slide box 3. The lifting mechanism 2 can drive the slide box 3 to slide.

[0061] In this embodiment, the slide box 3 is fixedly connected to a driving mechanism 4, the bottom of the slide box 3 is rotatably connected to a cutting spindle 5, and the output end of the driving mechanism 4 is transmission-connected to the end of the cutting spindle 5, the end of the cutting spindle 5 is fixedly connected to a cutting tool, the driving mechanism 4 drives the cutting tool to rotate through the cutting spindle 5, and the slide box 3 drives the rotating cutting spindle 5 to move to perform cutting processing on the workpiece.

[0062] The working principle of the present invention is as follows: when in use, first adjust the distance between the two L-shaped clamps 82 according to the size of the workpiece, loosen the locking knob 833, adjust the position of the arc-shaped slider 831 inside the T-shaped slot 85, and also rotate the direction of the L-shaped clamp 82 to adjust the maximum size that the clamp can reach, and then place the workpiece between the multiple set L-shaped clamps 82, and then the servo motor 9 drives the rotary table 61 to rotate through the transmission cooperation between the active bevel gear 91 and the driven bevel gear 65, so that the workpiece on the rotary table 61 rotates to the bottom of the cutting spindle 5, and the output rod of the electric cylinder 10 pushes the tilting slider 11 to move By cooperating with the inclined surface of the inclined slider 11 and the connecting rod 74, the connecting rod 74 drives the clamping seats 72 on both sides to move closer to the middle through the hinge plate 73, and the clamping seat 72 drives the dovetail sliders 81 on both sides to move closer to each other by extending the housing 84, and the workpiece is clamped by the L-shaped clamping plate 82 on the dovetail slider 81. The lifting mechanism 2 controls the movement of the slide box 3, and the driving mechanism 4 on the slide box 3 drives the cutting spindle 5 to rotate, and the workpiece is cut by the tool at the end of the cutting spindle 5. While processing the workpiece, the workpiece can be placed again at the other end of the rotary worktable 61 without affecting the workpiece being processed, saving effort in fixing the workpiece and improving processing efficiency.

[0063] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0064] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A positioning fixture for a CNC machine tool, characterized in that: The invention comprises a numerically controlled machine tool, wherein the numerically controlled machine tool comprises a base (1), a locking bracket (7) is fixedly connected to the base (1), a workpiece converter (6) is movably connected above the locking bracket (7), and two groups of clamping assemblies are movably connected to the workpiece converter (6), each group of the clamping assemblies comprises four symmetrically arranged workpiece clamping slides (8); The workpiece converter (6) includes a rotating worktable (61), and the rotating worktable (61) is provided with symmetrically arranged dovetail grooves (62) and slide grooves (63), wherein the slide grooves (63) are provided in two groups, and each group of the slide grooves (63) is arranged in a rectangular array.

2. The positioning fixture for a CNC machine tool according to claim 1, characterized in that: A shaft (64) is fixedly connected to the center position of the bottom of the rotary workbench (61), and a driven bevel gear (65) is interference-fitted at the end of the shaft (64).

3. The positioning fixture for a CNC machine tool according to claim 1, characterized in that: The locking bracket (7) includes a support base (71) fixedly connected to the base (1), the end of the support base (71) is integrally provided with a support boss (75), the end of the shaft (64) passes through the inner side of the support boss (75), and the driven bevel gear (65) is located at the bottom of the support base (71).

4. The positioning fixture for a CNC machine tool according to claim 3, characterized in that: A clamping seat (72) is symmetrically provided between the support seat (71) and the rotating workbench (61), and a rectangular protrusion is integrally provided on the bottom of the clamping seat (72), and a rectangular slide groove (76) corresponding to the rectangular protrusion is provided on the support seat (71), and the rectangular protrusion is slidably connected to the rectangular slide groove (76).

5. The positioning fixture for a CNC machine tool according to claim 4, characterized in that: Both ends of each clamping seat (72) are movably connected to a hinge plate (73), and the end of the hinge plate (73) on the same side away from the clamping seat (72) is movably connected, and a connecting rod (74) is inserted at the connection, and both sides of the connecting rod (74) are movably connected to the end of the hinge plate (73) away from the clamping seat (72).

6. The positioning fixture for a CNC machine tool according to claim 4, characterized in that: The bottom of the support seat (71) is symmetrically fixedly connected to an electric cylinder (10), and the end of each electric cylinder (10) is fixedly connected to an inclined slider (11), and the inclined slider (11) is located between the support seat (71) and the connecting rod (74); The side surface of the inclined slider (11) is fitted on the bottom of the support seat (71), the side of the inclined slider (11) close to the connecting rod (74) is tilted, and the inclined slider (11) is fitted on the connecting rod (74).

7. The positioning fixture for a CNC machine tool according to claim 4, characterized in that: The workpiece clamping slide (8) includes a dovetail slider (81) slidably connected to the inner side of the dovetail groove (62), and the bottom of the dovetail slider (81) is integrally provided with an extension (84), and the end of the extension (84) passes through the slide (63) and extends between the two clamping seats (72).

8. The positioning fixture for a CNC machine tool according to claim 7, characterized in that: The dovetail-shaped slider (81) is provided with a T-shaped slot (85), the inner side of the T-shaped slot (85) is slidably connected to a locking column (83), and the end of the locking column (83) passes through the T-shaped slot (85) and extends to the top of the L-shaped clamping plate (82).

9. The positioning fixture for a CNC machine tool according to claim 8, characterized in that: An L-shaped clamping plate (82) is placed above the dovetail-shaped slider (81), a through hole (821) is opened at the end of the L-shaped clamping plate (82), and the end of the locking column (83) passes through the through hole (821).

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