Clamp for numerical control machine tool machining

Abstract

The utility model relates to a clamp for numerical control machine tool machining. The clamp comprises a base, a first clamping plate for clamping the two sides of a workpiece, a second clamping plate for pressing the two sides of the workpiece, a moving assembly for driving the first clamping plate to move and a limiting assembly for preventing the moving assembly from moving. The limiting assembly is arranged in the base; the acting end of the limiting assembly is connected with the moving assembly; two groups of first clamping plates are oppositely arranged; and the second clamping plate slides up and down on the first clamping plate. The problems that indentations are pressed on the side walls of workpieces in the clamping process when the workpieces with fixed specifications and styles are clamped generally, the left ends and the right ends of the workpieces are not horizontal after the workpieces are clamped, and if the workpieces are clamped through a two-way screw, the two-way screw is inevitably rotated in the machining process, so that the clamping force of the clamp is reduced, and the machining efficiency is affected are solved. And workpieces are difficult to clamp.

Description

Technical Field

[0001] The utility model relates to the field of numerical control machine tools, in particular to a clamp for machining numerical control machine tools. Background Art

[0002] In the prior art, a fixture is a device used to fix a workpiece during processing, testing, assembly, and transportation. The fixture not only ensures the precision of workpiece processing and improves productivity, but also ensures that the fixture can securely and firmly fix the workpiece without causing damage to the workpiece. Fixtures are widely used in manufacturing, automobiles, medical equipment, and other fields.

[0003] Existing clamps usually clamp the workpiece by mechanical or hydraulic means, and the existing clamps usually clamp workpieces of fixed specifications and styles. During the clamping process, indentations will be pressed on the side walls of the workpiece, and the left and right ends of the workpiece will inevitably be in an uneven state after clamping. If clamped by a bidirectional screw, it is inevitable that the bidirectional screw will rotate during the processing, thereby reducing the clamping force of the clamp and making it difficult to clamp the workpiece. Utility Model Content

[0004] The embodiment of the present application provides a clamp for CNC machine tool processing, which solves the problem in the prior art that workpieces of fixed specifications and styles are usually clamped, and indentations will be pressed on the side walls of the workpiece during the clamping process. In addition, the left and right ends of the workpiece will inevitably be in an uneven state after clamping. Furthermore, if clamped by a bidirectional screw, the bidirectional screw will inevitably rotate during the processing, thereby reducing the clamping force of the clamp and making it difficult to clamp the workpiece.

[0005] The technical solution adopted in the embodiments of the present application is as follows.

[0006] A clamp for CNC machine tool processing, including a base, a first clamping plate for clamping both sides of a workpiece, a second clamping plate for pressing down both sides of the workpiece, a moving component for driving the first clamping plate to move, and a limiting component for preventing the moving component from moving; the limiting component is arranged in the base; the active end of the limiting component is connected to the moving component; the first clamping plates are arranged in two groups relatively to each other; the second clamping plate slides up and down on the first clamping plate.

[0007] A further technical solution is: a sliding groove is provided on the base; the moving assembly includes a gear, a rack meshing with the gear and a first connecting block connected to the first clamping plate; the rack circumferential array is provided in two groups; the first connecting block is provided on the end face of the rack; the second connecting block is provided on the first clamping plate; the second connecting block slides in another group of the sliding grooves.

[0008] A further technical solution is: the limiting component includes a worm wheel, a worm meshing with the worm wheel and a connecting rod connecting the gear; the connecting rod rotates synchronously with the worm wheel; the worm is rotatably connected in the base; and the worm drives the gear to rotate relatively when rotating.

[0009] A further technical solution is: a square groove is provided on the end face of the worm; and the square groove is rotated by an external tool.

[0010] A further technical solution is: a guide rod is provided on the first clamping plate; the guide rod is passed through the second clamping plate; an adjusting piece is rotatably connected to the first clamping plate; the adjusting piece is threadedly passed through the second clamping plate.

[0011] A further technical solution is: the adjusting member is a bolt.

[0012] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0013] 1. Due to the square shape of the base, a worm is rotatably connected in the base, a worm wheel is rotatably connected at the center of the base, the worm wheel meshes with the worm, a connecting rod is provided on the worm wheel, the other end of the connecting rod is connected to a gear, the gear and the worm wheel rotate synchronously, a rack is slidably connected in the base, a sliding groove is provided on the base, the rack slides in the sliding groove, the rack meshes with the gear, a first connecting block is provided on the end face of the rack, two groups of sliding grooves are relatively provided, a second connecting block is provided on the first splint, the first connecting block slides in one group of sliding grooves, the second connecting block slides in the other group of sliding grooves, the rack moves synchronously with the first splint, a guide rod is provided on the first splint, a second splint is penetrated on the guide rod, an adjusting piece is threadedly connected to the second splint, and an adjusting piece is provided on the second splint. The bottom of the workpiece is rotatably connected to the first clamping plate, and the adjusting part rotates to drive the second clamping plate to move up and down. When in use, the worm is first rotated to make the two groups of first clamping plates relatively far away, and then the two groups of adjusting parts are rotated to make the distance between the second clamping plate and the base greater than the height of the workpiece, and then the workpiece is placed between the two groups of first clamping plates, and then the worm is rotated to make the two groups of first clamping plates gradually move toward the workpiece. When they are about to touch the workpiece, the adjusting part is rotated to make the second clamping plate press down the workpiece so that the two sides of the workpiece are parallel, and then the worm is rotated to make the first clamping plate clamp the workpiece. At this time, the position of the workpiece is fixed, and during processing, the worm is always stationary, so that the first clamping plate always clamps the workpiece, thereby making the left and right ends of the workpiece level and preventing the fixture from shaking when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the fixture for CNC machine tool processing in the utility model.

[0015] Figure 2It is a side view of the fixture for CNC machine tool processing in the utility model.

[0016] Figure 3 It is a cross-sectional view of the fixture for CNC machine tool processing in the utility model.

[0017] Figure 4 It is a cross-sectional view of the fixture for CNC machine tool processing in the utility model.

[0018] In the figure: 1, base; 11, sliding groove; 2, first clamping plate; 21, second connecting block; 22, guide rod; 23, adjusting member; 3, second clamping plate; 4, moving assembly; 41, gear; 42, rack; 43, first connecting block; 5, limiting assembly; 51, worm wheel; 52, worm; 521, square groove; 53, connecting rod. DETAILED DESCRIPTION

[0019] The embodiment of the present application provides a clamp for CNC machine tool processing, which solves the problem in the prior art that workpieces of fixed specifications and styles are usually clamped, and indentations will be pressed on the side walls of the workpiece during the clamping process. In addition, the left and right ends of the workpiece will inevitably be in an uneven state after clamping. Furthermore, if clamped by a bidirectional screw, the bidirectional screw will inevitably rotate during the processing, thereby reducing the clamping force of the clamp and making it difficult to clamp the workpiece.

[0020] The technical solution in the embodiment of the present application is to solve the above problems, and the overall idea is as follows

[0021] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] A clamp for CNC machine tool processing includes a base 1, a first clamping plate 2 for clamping both sides of a workpiece, a second clamping plate 3 for pressing down both sides of the workpiece, a moving component 4 for driving the first clamping plate 2 to move, and a limiting component 5 for preventing the moving component 4 from moving; the limiting component 5 is arranged in the base 1; the action end of the limiting component 5 is connected to the moving component 4; two groups of first clamping plates 2 are arranged relatively to each other; the second clamping plate 3 slides up and down on the first clamping plate 2.

[0023] A sliding groove 11 is provided on the base 1; the moving assembly 4 includes a gear 41, a rack 42 meshing with the gear 41 and a first connecting block 43 connected to the first clamping plate 2; two groups of racks 42 are arranged in a circular array; the first connecting block 43 is arranged on the end face of the rack 42; a second connecting block 21 is provided on the first clamping plate 2; the second connecting block 21 slides in another group of sliding grooves 11.

[0024] The limiting assembly 5 includes a worm wheel 51, a worm 52 meshing with the worm wheel 51, and a connecting rod 53 connected to the gear 41; the connecting rod 53 rotates synchronously with the worm wheel 51; the worm 52 is rotatably connected in the base 1; when the worm 52 rotates, it drives the gear 41 to rotate relatively.

[0025] A square groove 521 is formed on the end surface of the worm 52 ; the square groove 521 is rotated by an external tool.

[0026] A guide rod 22 is provided on the first clamping plate 2 ; the guide rod 22 is passed through the second clamping plate 3 ; an adjusting member 23 is rotatably connected to the first clamping plate 2 ; the adjusting member 23 is threadedly passed through the second clamping plate 3 .

[0027] The adjusting member 23 is a bolt.

[0028] The base 1 is square, and a worm 52 is rotatably connected inside the base 1. A worm wheel 51 is rotatably connected at the center of the base 1. The worm wheel 51 meshes with the worm 52. A connecting rod 53 is provided on the worm wheel 51. The other end of the connecting rod 53 is connected to a gear 41. The gear 41 rotates synchronously with the worm wheel 51. A rack 42 is slidably connected inside the base 1. A sliding groove 11 is provided on the base 1. The rack 42 slides in the sliding groove 11. The rack 42 meshes with the gear 41. A first connecting block 43 is provided on the end face of the rack 42. The sliding groove 11 is relatively provided with two groups. A second connecting block 21 is provided on the first splint 2. The first connecting block 43 slides in one group of sliding grooves 11, and the second connecting block 21 slides in the other group of sliding grooves 11. The rack 42 moves synchronously with the first splint 2. A guide rod 22 is provided on the first splint 2. The guide rod 2 2 is penetrated by a second clamping plate 3, and an adjusting piece 23 is threadedly connected to the second clamping plate 3. The bottom of the adjusting piece 23 is rotatably connected to the first clamping plate 2, and the adjusting piece 23 drives the second clamping plate 3 to move up and down when it is rotated. When in use, the worm 52 is first rotated to make the two groups of first clamping plates 2 relatively far away from each other, and then the two groups of adjusting pieces 23 are rotated to make the distance between the second clamping plate 3 and the base 1 greater than the height of the workpiece, and then the workpiece is placed between the two groups of first clamping plates 2, and then the worm 52 is rotated to make the two groups of first clamping plates 2 gradually move toward the workpiece. When the workpiece is about to be touched, the adjusting piece 23 is rotated to make the second clamping plate 3 press down the workpiece so that the two sides of the workpiece are parallel, and then the worm 52 is rotated to make the first clamping plate 2 clamp the workpiece. At this time, the position of the workpiece is fixed, and during processing, the worm 52 is always stationary, so that the first clamping plate 2 always clamps the workpiece

[0029] Since the base 1 is square, a worm 52 is rotatably connected in the base 1, and a worm wheel 51 is rotatably connected at the center of the base 1. The worm wheel 51 meshes with the worm 52. A connecting rod 53 is provided on the worm wheel 51. The other end of the connecting rod 53 is connected to a gear 41. The gear 41 rotates synchronously with the worm wheel 51. A rack 42 is slidably connected in the base 1. A sliding groove 11 is provided on the base 1. The rack 42 slides in the sliding groove 11. The rack 42 meshes with the gear 41. A first connecting block 43 is provided on the end face of the rack 42. The sliding groove 11 is relatively provided with two groups. A second connecting block 21 is provided on the first splint 2. The first connecting block 43 slides in one group of sliding grooves 11, and the second connecting block 21 slides in the other group of sliding grooves 11. The rack 42 moves synchronously with the first splint 2. A guide rod 22 is provided on the first splint 2, and a second splint 3 is passed through the guide rod 22. The second clamping plate 3 is threadedly connected with an adjusting piece 23, and the bottom of the adjusting piece 23 is rotatably connected to the first clamping plate 2. When the adjusting piece 23 rotates, it drives the second clamping plate 3 to move up and down. When in use, first rotate the worm 52 to make the two groups of first clamping plates 2 relatively far apart, then rotate the two groups of adjusting pieces 23 to make the distance between the second clamping plate 3 and the base 1 greater than the height of the workpiece, then place the workpiece between the two groups of first clamping plates 2, then rotate the worm 52 to make the two groups of first clamping plates 2 gradually move toward the workpiece, until they are about to touch the workpiece, rotate the adjusting piece 23 to make the second clamping plate 3 press down the workpiece so that the two sides of the workpiece are parallel, then rotate the worm 52 to make the first clamping plate 2 clamp the workpiece, at this time the position of the workpiece is fixed, and during processing, the worm 52 is always stationary, so that the first clamping plate 2 always clamps the workpiece, thereby making the left and right ends of the workpiece level and preventing the clamp from shaking when in use.

[0030] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0031] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A fixture for CNC machine tool processing, characterized in that: The invention comprises a base (1), a first clamping plate (2) for clamping two sides of a workpiece, a second clamping plate (3) for pressing down two sides of the workpiece, a moving component (4) for driving the first clamping plate (2) to move, and a limiting component (5) for preventing the moving component (4) from moving; the limiting component (5) is arranged in the base (1); the active end of the limiting component (5) is connected to the moving component (4); the first clamping plates (2) are arranged in two groups relatively to each other; and the second clamping plates (3) slide up and down on the first clamping plates (2).

2. The fixture for CNC machine tool processing according to claim 1, characterized in that: The base (1) is provided with a sliding groove (11); the moving assembly (4) comprises a gear (41), a rack (42) meshing with the gear (41) and a first connecting block (43) connected to the first clamping plate (2); the rack (42) is arranged in two groups in a circumferential array; the first connecting block (43) is arranged on the end surface of the rack (42); the first clamping plate (2) is provided with a second connecting block (21); the second connecting block (21) slides in another group of the sliding grooves (11).

3. The fixture for CNC machine tool processing according to claim 2, characterized in that: The limiting assembly (5) comprises a worm wheel (51), a worm (52) meshing with the worm wheel (51), and a connecting rod (53) connected to the gear (41); the connecting rod (53) rotates synchronously with the worm wheel (51); the worm (52) is rotatably connected in the base (1); and when the worm (52) rotates, it drives the gear (41) to rotate relatively.

4. The fixture for CNC machine tool processing as claimed in claim 3, characterized in that: The end surface of the worm (52) is provided with a square groove (521); the square groove (521) is rotated by an external tool.

5. The fixture for CNC machine tool processing according to claim 1, characterized in that: The first clamping plate (2) is provided with a guide rod (22); the guide rod (22) is inserted into the second clamping plate (3); the first clamping plate (2) is rotatably connected with an adjusting member (23); the adjusting member (23) is threadedly inserted into the second clamping plate (3).

6. The fixture for CNC machine tool processing according to claim 5, characterized in that: The adjusting member (23) is a bolt.

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