Numerical control machine tool curved surface clamping fixture

Abstract

The invention discloses a numerical control machine tool curved surface clamping fixture, and relates to the technical field of fixtures, the numerical control machine tool curved surface clamping fixture comprises a machine shell, a negative pressure adsorption mechanism is arranged in the machine shell, a driving piece is arranged in the negative pressure adsorption mechanism, a control panel is rotatably arranged in the machine shell, and three clamping blocks are movably arranged in the machine shell; the ends, inserted into the machine shell, of the three clamping blocks are in sliding fit with the inner wall of the control panel. The driving part moves to enable the interior of the negative pressure adsorption mechanism to be in a negative pressure state so that a workpiece can be adsorbed and fixed conveniently, the control disc is driven to rotate along with movement of the driving part, the three clamping blocks are promoted to contract to clamp and fix the workpiece, and therefore stability is better when the workpiece is clamped and fixed, and clamping of the workpiece is more convenient; when the driving piece moves, airflow in the air guide cavity is conveniently conveyed into the first nozzle through the air guide pipe, and then the airflow is jetted through the first nozzle to blow the surface of the workpiece, so that impurities attached to the surface of the workpiece are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of fixtures, in particular to a curved surface clamping fixture for numerically controlled machine tools. Background Art

[0002] A CNC machine tool is an automated machine tool equipped with a program control system. The control system can logically process programs specified by control codes or other symbolic instructions, decode them, and represent them with coded numbers. The information is input into the CNC device through an information carrier. After calculation and processing, the CNC device sends various control signals to control the movement of the machine tool and automatically process parts according to the shape and size required by the drawing. When processing the workpiece, it is often necessary to fix the workpiece, so a clamping fixture is needed.

[0003] Some existing fixtures only use clamping blocks to clamp and fix the workpiece. However, different workpieces have different shapes. When the workpiece surface is uneven, it is not stable when clamped by only a single clamping block. In addition, the operator needs to manually control the fixture to clamp the workpiece. Summary of the Invention

[0004] In order to improve the problem that the above-mentioned fixture is used to clamp and fix the workpiece only by a clamping block, however, different workpieces have different shapes, and when the workpiece surface is uneven, the stability is poor when it is clamped by only a single clamping block, and the operator needs to manually control the fixture to clamp the workpiece when clamping the workpiece, the present invention provides a CNC machine tool curved surface clamping fixture.

[0005] The present invention provides a CNC machine tool curved surface clamping fixture, which adopts the following technical solutions: A CNC machine tool curved surface clamping fixture includes a housing, a negative pressure adsorption mechanism disposed within the housing, a driving member disposed within the negative pressure adsorption mechanism, a control disk rotatably disposed within the housing, and three clamping blocks movably disposed within the housing, wherein one end of the three clamping blocks inserted into the housing slides in engagement with an inner wall of the control disk. The driving member is used to control the operation of the negative pressure adsorption mechanism, the driving member is used to drive the control disk to rotate, and the control disk is used to control the movement of the three clamping blocks.

[0006] Optionally, in the above-mentioned CNC machine tool curved surface clamping fixture, an air guide cavity is opened inside the casing, and a plurality of first nozzles are fixedly plugged into the front side of the casing. The first nozzles are connected to the inner wall of the air guide cavity by setting an air guide tube, and the air outlet end of the first nozzle is bent toward the direction of the clamping block.

[0007] Optionally, in the above-mentioned CNC machine tool curved surface clamping fixture, the negative pressure adsorption mechanism includes a suction cup, the suction cup is fixedly inserted into the front side of the casing, and a piston cylinder is fixedly provided on one end of the suction cup inserted into the casing.

[0008] Optionally, in the above-mentioned CNC machine tool curved surface clamping fixture, the driving part includes a cylinder and a piston rod, the cylinder is fixedly arranged inside the air guide chamber, a disc is fixedly arranged at the protruding end of the cylinder, one end of the piston rod is fixedly arranged on the disc, and the other end of the piston rod is movably inserted in the piston cylinder, and a spiral groove is provided on the outer wall of the piston rod.

[0009] Optionally, in the above-mentioned CNC machine tool curved surface clamping fixture, two guide rods are fixedly provided on the inner side of the control disk, and the ends of the two guide rods away from the control disk are inserted into the spiral groove and slide with the inner wall of the spiral groove, and the outer wall of the control disk is provided with inclined grooves corresponding to the number of clamping blocks.

[0010] Optionally, in the above-mentioned CNC machine tool curved surface clamping fixture, the front side of the casing is provided with a number of movable slots corresponding to the clamping block, and the clamping block includes a movable rod and an all-round clamping plate, one end of the movable rod passes through the movable slot and is inserted into the inclined slot and slides with the inner wall of the inclined slot, and the other end of the movable rod extends out of the movable slot and is fixedly connected to the all-round clamping plate.

[0011] Optionally, in the above-mentioned CNC machine tool curved surface clamping fixture, the all-round clamp includes a fixed block and several T-shaped rods, the fixed block is fixedly set at one end of the movable rod extending out of the movable slot, the ends of several of the T-shaped rods pass through the fixed block and are fixed with rubber strips, and the T-shaped rods are connected to the fixed block by setting a first spring.

[0012] Optionally, in the above-mentioned CNC machine tool curved surface clamping fixture, a plurality of piston cavities are opened inside the casing, and air pushing parts are movably provided in the plurality of piston cavities. A number of second nozzles corresponding to the number of piston cavities are fixedly plugged into the front side of the casing, and the second nozzles are connected to the inner wall of the piston cavity, and the air outlet end of the second nozzle is bent toward the omnidirectional clamp.

[0013] Optionally, in the above-mentioned CNC machine tool curved surface clamping fixture, the outer wall of the control disk is provided with a number of wavy grooves corresponding to the number of the air pushers, and the movement of the air pushers is controlled by the wavy grooves when the control disk rotates.

[0014] Optionally, in the above-mentioned CNC machine tool curved surface clamping fixture, the air pusher includes a piston plate and a round head column, one end of the round head column slides with the inner wall of the wavy groove, and the other end of the round head column is inserted into the piston cavity and fixedly connected to the piston plate, and the piston plate is connected to the inner wall of the piston cavity by setting a second spring.

[0015] In summary, the present invention has at least one of the following beneficial effects: The movement of the driving member causes the interior of the negative pressure adsorption mechanism to be in a negative pressure state, so as to facilitate the adsorption and fixation of the workpiece. As the driving member moves, the control disk is driven to rotate, and the three clamping blocks are forced to contract to clamp and fix the workpiece. Therefore, the workpiece is more stable when being clamped and fixed, and the workpiece is more convenient to clamp. When the driving member moves, the air flow in the air guide cavity is transported to the first nozzle through the air guide pipe, and then the air flow is sprayed through the first nozzle to purge the surface of the workpiece to reduce debris attached to the surface of the workpiece; When the control disk rotates, the air pusher slides along the inner wall of the wavy groove, thereby causing the air pusher to move back and forth in the piston cavity, and then continuously pushing the air flow in the piston cavity into the second nozzle, and then spraying air through the second nozzle to blow the surface of the splint in all directions to reduce debris attached to the surface of the splint in all directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a sectional view of a three-dimensional local structure of the present invention; Figure 3 It is a partial structural cross-sectional view of the three-dimensional control panel of the present invention; Figure 4 It is a partial structural cross-sectional view of the three-dimensional casing of the present invention.

[0017] In the figure: 1. casing; 11. air guide chamber; 12. first nozzle; 13. air guide tube; 14. movable groove; 15. piston chamber; 16. air pusher; 161. piston plate; 162. round head column; 163. second spring; 17. second nozzle; 2. negative pressure adsorption mechanism; 21. suction cup; 22. piston cylinder; 3. driving member; 31. cylinder; 32. piston rod; 33. disc; 34. spiral groove; 4. control plate; 41. guide rod; 42. inclined groove; 43. wavy groove; 5. clamping block; 51. movable rod; 52. all-round clamping plate; 521. fixed block; 522. T-shaped rod; 523. rubber strip; 524. first spring. DETAILED DESCRIPTION

[0018] The following is combined with Figures 1-4 The present invention is described in further detail.

[0019] Please refer to the attached figure in the instruction manual Figures 1-4, the present invention provides an embodiment: a CNC machine tool curved surface clamping fixture, including a casing 1, a negative pressure adsorption mechanism 2 is provided inside the casing 1, a driving member 3 is provided inside the negative pressure adsorption mechanism 2, the negative pressure adsorption mechanism 2 includes a suction cup 21, the suction cup 21 is fixedly plugged into the front side of the casing 1, and a piston cylinder 22 is fixedly provided on one end of the suction cup 21 inserted into the casing 1. When the driving member 3 moves, it slides along the inner wall of the piston cylinder 22, thereby facilitating the control of the suction cup 21 in a negative pressure state, and then the workpiece is adsorbed and fixed by the suction cup 21.

[0020] A control panel 4 is rotatably provided inside the housing 1. Three clamping blocks 5 are movably provided inside the housing 1. One end of the three clamping blocks 5 is inserted into the housing 1 and slides with the inner wall of the control panel 4. The driving member 3 is used to control the operation of the negative pressure adsorption mechanism 2 , the driving member 3 is used to drive the control disk 4 to rotate, and the control disk 4 is used to control the movement of the three clamping blocks 5 .

[0021] An air guide cavity 11 is provided inside the casing 1, and a plurality of first nozzles 12 are fixedly connected to the front side of the casing 1. The first nozzles 12 are connected to the inner wall of the air guide cavity 11 by setting an air guide pipe 13. The air outlet end of the first nozzle 12 is bent toward the clamping block 5. When the driving member 3 moves, the air flow in the air guide cavity 11 is transported to the first nozzle 12 through the air guide pipe 13, and then the air flow is sprayed through the first nozzle 12 to purge the surface of the workpiece to reduce debris attached to the surface of the workpiece.

[0022] When the cam 32 is in the air, the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber 11 is sucked up and the air in the air chamber

[0023] Two guide rods 41 are fixedly provided on the inner side of the control disk 4. The ends of the two guide rods 41 away from the control disk 4 are inserted into the spiral groove 34 and slide with the inner wall of the spiral groove 34. The outer wall of the control disk 4 is provided with inclined grooves 42 corresponding in number to the clamping block 5. When the piston rod 32 moves, the guide rods 41 slide along the inner wall of the spiral groove 34, thereby driving the control disk 4 to rotate through the guide rods 41, and the control clamping block 5 is easily moved as the control disk 4 rotates.

[0024] The front side of the casing 1 is provided with movable slots 14 corresponding in number to the clamping block 5. The clamping block 5 includes a movable rod 51 and an omnidirectional clamping plate 52. One end of the movable rod 51 passes through the movable slot 14 and is inserted into the inclined slot 42 and slides with the inner wall of the inclined slot 42. The other end of the movable rod 51 extends out of the movable slot 14 and is fixedly connected to the omnidirectional clamping plate 52. The movable slot 14 facilitates the installation of the clamping block 5. When the control disk 4 rotates, the movable rod 51 slides along the inner wall of the inclined slot 42, and then drives the omnidirectional clamping plate 52 to move through the movable rod 51, so that the workpiece is clamped and fixed by the omnidirectional clamping plate 52.

[0025] The omnidirectional splint 52 includes a fixed block 521 and a plurality of T-shaped rods 522. The fixed block 521 is fixedly set at one end of the movable rod 51 extending out of the movable groove 14. The ends of the plurality of T-shaped rods 522 pass through the fixed block 521 and are fixedly provided with rubber strips 523. The T-shaped rods 522 are connected to the fixed block 521 by setting a first spring 524. The first spring 524 facilitates the pulling of the movable rod 51 and the rubber strip 523 to move, so that when the fixed block 521 moves, the rubber strip 523 is prompted to contact the workpiece first. When the surface of the workpiece is uneven, the plurality of rubber strips 523 and the movable rod 51 are prompted to move, so as to facilitate the clamping and fixation of workpieces with different rules.

[0026] Several piston chambers 15 are provided inside the casing 1, and air pushers 16 are movably provided in the several piston chambers 15. Second nozzles 17 corresponding in number to the piston chambers 15 are fixedly connected to the front side of the casing 1. The second nozzles 17 are connected to the inner wall of the piston chamber 15, and the air outlet end of the second nozzle 17 is bent toward the omnidirectional splint 52, which facilitates the installation of the air pushers 16 through the piston chamber 15. When the air pushers 16 move, it is convenient to push the airflow in the piston chamber 15 into the second nozzle 17, and then the airflow is sprayed through the second nozzle 17 to blow the surface of the omnidirectional splint 52 to reduce the debris attached to the surface of the omnidirectional splint 52.

[0027] The outer wall of the control disk 4 is provided with wavy grooves 43 whose number corresponds to the air pushing parts 16. When the control disk 4 rotates, the movement of the air pushing parts 16 is controlled by the wavy grooves 43. When the control disk 4 rotates, the air pushing parts 16 slide along the inner walls of the wavy grooves 43, thereby prompting the air pushing parts 16 to reciprocate in the piston chamber 15, and then continuously pushing the air flow in the piston chamber 15 to the second nozzle 17.

[0028] The air pushing part 16 includes a piston plate 161 and a round head column 162. One end of the round head column 162 slides with the inner wall of the wavy groove 43, and the other end of the round head column 162 is inserted into the piston cavity 15 and fixedly connected to the piston plate 161. The piston plate 161 is connected to the inner wall of the piston cavity 15 by setting a second spring 163. The second spring 163 facilitates the movement of the piston plate 161 and the round head column 162, thereby prompting the round head column 162 to always abut against the inner wall of the wavy groove 43, and then when the control disk 4 rotates, the round head column 162 and the piston plate 161 are controlled to make reciprocating motion on the inner wall of the air guide cavity 11, so as to continuously push the airflow in the piston cavity 15 to the second nozzle 17.

[0029] Working principle: When using the CNC machine tool curved surface clamping fixture, when the workpiece needs to be clamped, the workpiece is placed between the three clamping blocks 5, and the workpiece is forced to fit into the negative pressure adsorption mechanism 2, and then the driving member 3 is moved to cause the inside of the negative pressure adsorption mechanism 2 to be in a negative pressure state, so as to facilitate the adsorption and fixation of the workpiece, and as the driving member 3 moves, the control disk 4 is driven to rotate, and the three clamping blocks 5 are forced to contract to clamp and fix the workpiece, so that the workpiece is more stable when clamped and fixed.

[0030] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A CNC machine tool curved surface clamping fixture, comprising a housing (1), characterized in that: A negative pressure adsorption mechanism (2) is provided inside the housing (1), a driving member (3) is provided inside the negative pressure adsorption mechanism (2), a control disk (4) is rotatably provided inside the housing (1), three clamping blocks (5) are movably provided inside the housing (1), and one end of the three clamping blocks (5) is inserted into the housing (1) and slidably engages with the inner wall of the control disk (4); The driving member (3) is used to control the operation of the negative pressure adsorption mechanism (2), the driving member (3) is used to drive the control disk (4) to rotate, and the control disk (4) is used to control the movement of the three clamping blocks (5).

2. The CNC machine tool curved surface clamping fixture according to claim 1, characterized in that: An air guide cavity (11) is provided inside the housing (1), and a plurality of first nozzles (12) are fixedly connected to the front side of the housing (1). The first nozzles (12) are connected to the inner wall of the air guide cavity (11) via an air guide tube (13), and the air outlet end of the first nozzle (12) is bent toward the clamping block (5).

3. The CNC machine tool curved surface clamping fixture according to claim 2, characterized in that: The negative pressure adsorption mechanism (2) comprises a suction cup (21), the suction cup (21) being fixedly plugged into the front side of the housing (1), and a piston cylinder (22) being fixedly provided on one end of the suction cup (21) inserted into the housing (1).

4. The CNC machine tool curved surface clamping fixture according to claim 3, characterized in that: The driving member (3) includes a cylinder (31) and a piston rod (32). The cylinder (31) is fixedly arranged inside the air guide chamber (11). A disc (33) is fixedly arranged at the protruding end of the cylinder (31). One end of the piston rod (32) is fixedly arranged on the disc (33). The other end of the piston rod (32) is movably inserted into the piston cylinder (22). The outer wall of the piston rod (32) is provided with a spiral groove (34).

5. The CNC machine tool curved surface clamping fixture according to claim 4, characterized in that: Two guide rods (41) are fixedly provided on the inner side of the control disk (4), and the ends of the two guide rods (41) away from the control disk (4) are inserted into the spiral groove (34) and slidably engaged with the inner wall of the spiral groove (34). The outer wall of the control disk (4) is provided with inclined grooves (42) corresponding in number to the clamping blocks (5).

6. The CNC machine tool curved surface clamping fixture according to claim 5, characterized in that: The front side of the housing (1) is provided with movable slots (14) whose number corresponds to the number of the clamping blocks (5). The clamping blocks (5) include a movable rod (51) and an omnidirectional clamping plate (52). One end of the movable rod (51) passes through the movable slot (14) and is inserted into the inclined slot (42) and slidably engages with the inner wall of the inclined slot (42). The other end of the movable rod (51) extends out of the movable slot (14) and is fixedly connected to the omnidirectional clamping plate (52).

7. The CNC machine tool curved surface clamping fixture according to claim 6, characterized in that: The omnidirectional splint (52) comprises a fixed block (521) and a plurality of T-shaped rods (522). The fixed block (521) is fixedly arranged at one end of the movable rod (51) extending out of the movable groove (14). The ends of the plurality of T-shaped rods (522) pass through the fixed block (521) and are fixedly provided with rubber strips (523). The T-shaped rods (522) are connected to the fixed block (521) by providing a first spring (524).

8. The CNC machine tool curved surface clamping fixture according to claim 6, characterized in that: The housing (1) is provided with a plurality of piston chambers (15), and a plurality of the piston chambers (15) are movably provided with air pushers (16). The front side of the housing (1) is fixedly connected with a number of second nozzles (17) corresponding to the number of the piston chambers (15), and the second nozzles (17) are connected to the inner wall of the piston chamber (15), and the air outlet end of the second nozzle (17) is bent toward the omnidirectional splint (52).

9. The CNC machine tool curved surface clamping fixture according to claim 8, characterized in that: The outer wall of the control disk (4) is provided with wavy grooves (43) whose number corresponds to the air pusher (16). When the control disk (4) rotates, the wavy grooves (43) control the movement of the air pusher (16).

10. The CNC machine tool curved surface clamping fixture according to claim 9, characterized in that: The air pusher (16) includes a piston plate (161) and a round-headed column (162), one end of the round-headed column (162) is slidably engaged with the inner wall of the wavy groove (43), and the other end of the round-headed column (162) is inserted into the piston cavity (15) and fixedly connected to the piston plate (161), and the piston plate (161) is connected to the inner wall of the piston cavity (15) by setting a second spring (163).

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