Numerical control machine tool clamp

Abstract

The invention discloses a numerical control machine tool clamp, relates to the technical field of numerical control machine tools, and solves the technical problems that the clamping force of an existing numerical control machine tool clamp is difficult to grasp, and a workpiece is easy to deform and damage in the clamping process. Comprising a base, a portal frame installed at the top of the base and a hydraulic cylinder installed on the portal frame, clamping pieces are symmetrically arranged at the top of the base and comprise movable bases and clamping plates, the clamping plates are installed at the tops, close to one sides, of the movable bases, an adjusting assembly used for controlling the movable bases to move is installed in the base, and the output end of the hydraulic cylinder is connected with a cross beam; a T-shaped sliding groove is formed in the bottom of the cross beam, T-shaped sliding blocks are symmetrically arranged at the bottom of the T-shaped sliding groove in a sliding mode, and sleeves are fixedly connected to the bottoms of the T-shaped sliding blocks. According to the clamping device, the workpiece can be conveniently limited in multiple directions, the positioning stability is improved, the pressing force applied to the workpiece can be conveniently controlled, and the situation that the workpiece is deformed and damaged due to too large pressure can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled machine tools, and in particular to a clamp for numerically controlled machine tools. Background Art

[0002] CNC machine tools are digitally controlled machine tools, which are automated machine tools equipped with a program control system. The control system can logically process programs specified by control codes or other symbolic instructions, decode them, express them in coded numbers, and input them into the CNC device through information carriers. After calculation and processing, the CNC device sends various control signals to control the movement of the machine tool and automatically process the parts according to the shape and size required by the drawing.

[0003] One of the main functions of CNC lathe fixtures is to clamp the workpiece to be processed and ensure that the workpiece is accurately positioned during the processing process, which is crucial to ensuring processing accuracy, because any slight position deviation may lead to a decrease in product quality. By ensuring stable clamping and precise positioning of the workpiece, CNC lathe fixtures help reduce errors and vibrations during the processing process, thereby improving product quality, which is especially important for companies that produce high-precision parts.

[0004] In the prior art, when a machine tool fixture clamps a workpiece, the workpiece is usually fixed on the machine tool by using the clamping claws or clamping blocks of the fixture, and the clamping force is provided by the mechanical structure of the fixture. However, the clamping force of the mechanical clamping is often large and difficult to accurately control, resulting in that it is difficult to control the clamping force of the fixture on the workpiece. The workpiece is easily deformed and damaged during the tightening and clamping process, affecting the normal use of the workpiece. Therefore, a CNC machine tool fixture is proposed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a CNC machine tool clamp, which solves the problem that the clamping force of the existing CNC machine tool clamp is difficult to control and the workpiece is easily deformed and damaged during the clamping process.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0008] As a further solution of the present invention: the pressure sensing assembly includes a pressure block with a T-shaped cross-section, a groove for installing the pressure block is opened on the upper surface of the inner part of the sleeve, and a pressure sensor is installed between the pressure block and the bottom of the groove.

[0009] As a further solution of the present invention: a column is slidably penetrated on the pressure block, the bottom end of the column is connected to the movable block through a spring, the top of the column slides through the top of the sleeve and the T-shaped slider in turn and extends upward, a shell sleeve mounted on the column is installed on the top of the T-shaped slider, a slideway for the shell sleeve to slide is opened on the top of the crossbeam, and the slideway is connected to the T-shaped slide groove, and a positioning assembly is installed between the shell sleeve and the column.

[0010] As a further solution of the present invention: the adjustment assembly includes a first screw rod rotatably installed in the base, the first screw rod is provided with two threads in opposite directions, a moving block is installed at the bottom of the movable seat, and a first through groove for the moving block to pass through is opened at the top of the base, and the first screw rod is threadedly connected to the moving block.

[0011] As a further solution of the present invention: the positioning assembly includes a rack embedded in one side of the column, and a movable groove corresponding to the rack is opened on the inner wall of one side of the shell, a matching tooth block is slidably arranged in the movable groove, and a screw is rotatably installed on one side of the tooth block close to the bottom of the movable groove, the screw penetrates the bottom of the movable groove and extends outward, and the screw is threadedly connected to the bottom of the movable groove.

[0012] As a further solution of the present invention: the pressure sensor is electrically connected to a display via a wire, and the display is embedded and installed on the outer cylinder wall of the sleeve.

[0013] As a further solution of the present invention: a second screw rod is rotatably installed in the movable seat, the second screw rod is provided with two threads in opposite directions, and two symmetrical side clamping blocks are threadedly sleeved on the second screw rod, a second through groove for the side clamping block to pass through is opened on the side wall of the movable seat, and the side clamping block is slidably connected to the second through groove.

[0014] As a further solution of the present invention: the top of the column passes through the top of the gantry, and two symmetrical guide grooves are formed through the top of the gantry. The column passes through the guide grooves, and the column is slidably connected to the guide grooves.

[0015] Beneficial effects of the present invention:

[0016] 1. In the present invention, the two clamping members are conveniently controlled to slide toward each other along the base through the adjustment component, so as to facilitate the left and right limiting of the workpiece placed on the base. The second screw in the rotating movable seat is convenient for controlling the two side clamping blocks to move toward each other, so as to facilitate the limiting of the front and rear sides of the workpiece, thereby facilitating the multi-directional limiting of the workpiece, making it difficult for the workpiece to be displaced and improving the stability of positioning.

[0017] 2. In the present invention, the hydraulic cylinder is used to drive the crossbeam to descend, and the crossbeam drives the sleeve to descend synchronously, so that the pressure plate can slide along the clamp until it contacts the top of the workpiece. As the crossbeam continues to descend, the sleeve and the slide rod can slide relative to each other to compress the spring continuously. The reaction force of the spring is used to press and position the workpiece. The pressure sensor component is used to know the specific reaction force of the spring, so that the pressing force applied by the pressure plate to the workpiece can be controlled as needed to avoid deformation and damage of the workpiece due to excessive pressure.

[0018] 3. In the present invention, the position of the column can be locked conveniently according to the need through the positioning assembly, and the column and the slide rod move synchronously, so as to facilitate the positioning of the slide rod, so that the slide rod will not be displaced after the spring is compressed to a suitable degree, which not only effectively ensures the stability of the clamping force of the pressure plate, but also prevents the pressure plate from jumping, which is beneficial to further improve the clamping and limiting effect of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a structural schematic diagram of a CNC machine tool fixture of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a clamping member in a CNC machine tool fixture of the present invention;

[0022] Figure 3 It is a side view structural schematic diagram of the connection part between the sleeve and the crossbeam in a CNC machine tool fixture of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the connection part between the clamping member and the base in a CNC machine tool fixture of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the connection part between the movable seat and the side clamp block in a CNC machine tool fixture of the present invention;

[0025] Figure 6 yes Figure 3 Enlarged view of part A.

[0026] In the figure: 1, base; 2, gantry; 3, hydraulic cylinder; 4, clamping member; 401, movable seat; 402, clamping plate; 5, crossbeam; 6, T-shaped slider; 7, sleeve; 8, movable block; 9, slide rod; 10, pressure plate; 11, spring; 12, pressure block; 13, pressure sensor; 14, column; 15, shell; 16, slideway; 17, first screw rod; 18, moving block; 19, first through groove; 20, rack; 21, movable groove; 22, tooth block; 23, screw rod; 24, display; 25, second screw rod; 26, side clamping block; 27, second through groove; 28, guide groove. DETAILED DESCRIPTION

[0027] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-6 As shown, the present invention is a CNC machine tool fixture, comprising a base 1, a gantry 2 installed on the top of the base 1 and a hydraulic cylinder 3 installed on the gantry 2. Clamping members 4 are symmetrically arranged on the top of the base 1 to facilitate limited clamping of the workpiece. The clamping member 4 comprises a movable seat 401 and a clamping plate 402. The clamping plate 402 is installed on the top of the movable seat 401 near one side. In order to facilitate the clamping of a higher workpiece, in this embodiment, one side of the clamping plate 402 is flush with one side of the movable seat 401. An adjusting component for controlling the movement of the movable seat 401 is installed in the base 1.

[0029] The adjustment assembly includes a first screw rod 17 rotatably installed in the base 1, and the first screw rod 17 is provided with two threads in opposite directions. A moving block 18 is installed at the bottom of the movable seat 401, and a first through groove 19 for the moving block 18 to pass through is opened on the top of the base 1. The first screw rod 17 is threadedly connected with the moving block 18, so that the first screw rod 17 can be rotated conveniently to make the moving block 18 drive the movable seat 401 to move, and the two movable seats 401 are used to facilitate the limitation of the left and right sides of the workpiece.

[0030] A second screw rod 25 is rotatably installed in the movable seat 401. The second screw rod 25 is provided with two threads in opposite directions, and two symmetrical side clamping blocks 26 are threadedly sleeved on the second screw rod 25. A second through groove 27 for the side clamping blocks 26 to pass through is opened on the side wall of the movable seat 401, and the side clamping blocks 26 are slidably connected to the second through groove 27. Rotating the second screw rod 25 facilitates the control of the two side clamping blocks 26 to move toward or away from each other, thereby facilitating the front and rear limiting of the workpiece after the left and right sides are limited, which is beneficial to further improve the stability of the workpiece, make the workpiece less likely to be displaced, and improve the positioning stability.

[0031] The output end of the hydraulic cylinder 3 is connected to the crossbeam 5. Starting the hydraulic cylinder 3 facilitates the control of the crossbeam 5 to move up and down. A T-shaped slide groove is provided at the bottom of the crossbeam 5, and a T-shaped slider 6 is symmetrically slidably arranged at the bottom of the T-shaped slide groove. A sleeve 7 is fixedly connected to the bottom of the T-shaped slider 6, and a movable block 8 is slidably arranged in the sleeve 7. The bottom of the movable block 8 is connected to a slide rod 9 passing through the bottom of the sleeve 7, and the bottom end of the slide rod 9 is connected to a pressure plate 10 slidably sleeved on the clamping plate 402, so that the pressure plate 10 can slide downward along the clamping plate 402 after the crossbeam 5 is lowered. A spring 11 is installed on the top of the movable block 8, and the reaction force generated by the compressed spring 11 is used to enable the pressure plate 10 to press and position the workpiece.

[0032] A pressure sensing assembly is installed between the spring 11 and the sleeve 7 to facilitate grasping the specific reaction force after the spring 11 is compressed. The pressure sensing assembly includes a pressure block 12 with a T-shaped cross-section. A groove for mounting the pressure block 12 is provided on the upper surface of the inner part of the sleeve 7, and a pressure sensor 13 is installed between the pressure block 12 and the bottom of the groove. The pressure sensor 13 is electrically connected to a display 24 through a wire to facilitate displaying the specific pressure value detected by the pressure sensor 13 on the display 24. The display 24 is embedded in the outer cylinder wall of the sleeve 7 to facilitate real-time grasp of the specific pressure value and avoid deformation and damage of the workpiece due to excessive pressure.

[0033] A column 14 is slidably provided on the pressure block 12, and the bottom end of the column 14 passes through the spring 11 and is connected to the movable block 8. The top of the column 14 slides through the top of the sleeve 7 and the T-shaped slider 6 in turn and extends upward. The top of the column 14 passes through the top of the gantry 2, and the top of the gantry 2 is penetrated by two symmetrical guide grooves 28. The column 14 passes through the guide groove 28, and the column 14 is slidably connected to the guide groove 28, which plays a guiding role, which is beneficial to improve the stability of the lifting of the beam 5. The top of the T-shaped slider 6 is installed with a shell sleeve 15 sleeved on the column 14, and the top of the beam 5 is provided with a slideway 16 for the shell sleeve 15 to slide, and the slideway 16 is connected to the T-shaped slideway.

[0034] A positioning assembly is installed between the shell 15 and the column 14 to facilitate locking the position of the column 14. The positioning assembly includes a rack 20 embedded in one side of the column 14. A movable groove 21 corresponding to the rack 20 is opened on the inner wall of one side of the shell 15. A matching tooth block 22 is slidably arranged in the movable groove 21. A screw 23 is rotatably installed on one side of the tooth block 22 close to the bottom of the movable groove 21. The screw 23 penetrates the bottom of the movable groove 21 and extends outward, and the screw 23 is threadedly connected to the bottom of the movable groove 21. Rotating the screw 23 drives the tooth block 22 to slide along the movable groove 21. Controlling the tooth block 22 to engage with the rack 20 can lock the position of the column 14.

[0035] The working principle of the present invention is as follows: the workpiece to be positioned is placed on the base 1, and the first screw rod 17 is rotated to make the two moving blocks 18 respectively drive the two movable seats 401 to move toward each other, until the movable seats 401 fit with the left and right sides of the workpiece, and the limiting in the left and right directions can be completed; then the second screw rod 25 is rotated to make the two side clamping blocks 26 slide toward each other along the second through groove 27, until the side clamping blocks 26 fit with the front and back sides of the workpiece, and the limiting in the front and back directions can be completed; finally, the hydraulic cylinder 3 is started to drive the cross beam 5 to move downward, and at this time the pressure plate 10 will slide downward along the clamping plate 402. When the pressure plate 10 contacts the top of the workpiece, as the cross beam 5 continues to descend, the pressure plate 10 cannot continue to move downward, which will cause relative sliding between the sleeve 7 and the slide bar 9 and cause the spring 11 to be continuously compressed. The reaction force of the spring 11 can make the pressure plate 10 press and position the top of the workpiece. During the compression of the spring 11, the pressure sensor 13 can detect the specific reaction force of the spring 11 after compression, and use the display 24 to display the specific pressure value, so as to facilitate the control of the pressing force of the workpiece to avoid deformation and damage of the workpiece due to excessive pressure. When the pressing force applied by the pressure plate 10 on the workpiece is adjusted to an appropriate size, the screw 23 is rotated to drive the tooth block 22 to slide toward the notch of the movable groove 21 until the tooth block 22 is engaged with the rack 20 embedded in one side of the column 14, so that the column 14 will not be displaced, which not only effectively ensures the stability of the pressing force of the pressure plate 10, but also prevents the pressure plate 10 from jumping, which is beneficial to further improve the clamping and limiting effect of the workpiece.

[0036] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A CNC machine tool fixture, comprising a base (1), a gantry (2) mounted on the top of the base (1), and a hydraulic cylinder (3) mounted on the gantry (2), characterized in that: A clamping member (4) is symmetrically arranged on the top of the base (1), and the clamping member (4) includes a movable seat (401) and a clamping plate (402), and the clamping plate (402) is installed on the top of the movable seat (401) near one side. An adjusting component for controlling the movement of the movable seat (401) is installed in the base (1), and the output end of the hydraulic cylinder (3) is connected to a crossbeam (5), and a T-shaped sliding groove is opened at the bottom of the crossbeam (5), and the bottom of the T-shaped sliding groove is symmetrically slidingly arranged. A T-shaped slider (6) is provided, the bottom of the T-shaped slider (6) is fixedly connected to a sleeve (7), a movable block (8) is slidably arranged in the sleeve (7), the bottom of the movable block (8) is connected to a slide rod (9) passing through the bottom of the sleeve (7), and the bottom end of the slide rod (9) is connected to a pressure plate (10) slidably sleeved on a clamp (402), a spring (11) is installed on the top of the movable block (8), and a pressure sensing component is installed between the spring (11) and the sleeve (7).

2. A CNC machine tool fixture according to claim 1, characterized in that: The pressure sensing assembly comprises a pressure block (12) with a T-shaped cross section, a groove for mounting the pressure block (12) is provided on the upper surface of the sleeve (7), and a pressure sensor (13) is installed between the pressure block (12) and the bottom of the groove.

3. A CNC machine tool fixture according to claim 2, characterized in that: A column (14) is slidably provided on the pressure block (12), the bottom end of the column (14) passes through the spring (11) and is connected to the movable block (8), the top end of the column (14) sequentially slides through the top of the sleeve (7) and the T-shaped slider (6) and extends upward, the top of the T-shaped slider (6) is provided with a shell (15) sleeved on the column (14), the top of the crossbeam (5) is provided with a slideway (16) for the shell (15) to slide, and the slideway (16) is connected to the T-shaped slide groove, and a positioning component is installed between the shell (15) and the column (14).

4. A CNC machine tool fixture according to claim 1, characterized in that: The adjustment assembly comprises a first screw rod (17) rotatably mounted in the base (1), the first screw rod (17) being provided with two threads in opposite directions, a moving block (18) being installed at the bottom of the movable seat (401), a first through slot (19) for the moving block (18) to pass through being formed at the top of the base (1), and the first screw rod (17) being threadedly connected to the moving block (18).

5. A CNC machine tool fixture according to claim 3, characterized in that: The positioning assembly comprises a rack (20) embedded in one side of the column (14); a movable groove (21) corresponding to the rack (20) is opened on the inner wall of one side of the shell (15); a matching tooth block (22) is slidably arranged in the movable groove (21); a screw rod (23) is rotatably installed on one side of the tooth block (22) close to the bottom of the movable groove (21); the screw rod (23) penetrates the bottom of the movable groove (21) and extends outward, and the screw rod (23) is threadedly connected to the bottom of the movable groove (21).

6. A CNC machine tool fixture according to claim 2, characterized in that: The pressure sensor (13) is electrically connected to a display (24) via a wire, and the display (24) is embedded and installed on the outer wall of the sleeve (7).

7. A CNC machine tool fixture according to claim 1, characterized in that: A second screw rod (25) is rotatably installed in the movable seat (401), the second screw rod (25) is provided with two threads in opposite directions, and two symmetrical side clamping blocks (26) are threadedly sleeved on the second screw rod (25), and a second through groove (27) for the side clamping block (26) to pass through is opened on the side wall of the movable seat (401), and the side clamping block (26) is slidably connected to the second through groove (27).

8. A CNC machine tool fixture according to claim 2, characterized in that: The top end of the column (14) passes through the top of the gantry (2), and two symmetrical guide grooves (28) are provided through the top of the gantry (2), and the column (14) passes through the guide grooves (28), and the column (14) is slidably connected to the guide grooves (28).

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