A CNC drilling positioning fixture suitable for metal sheet workpieces

Abstract

The present invention provides a CNC drilling positioning fixture suitable for metal sheet workpieces, belonging to the technical field of metal plate processing. The fixture is easy to operate, adjustable in size, and has a good supporting effect. After drilling, the plate is flat and the drilling hole position is accurate. The rectangular frame of the fixture is cross-arranged with a positioning component one and a positioning component two. The support component is arranged at the intersection of the positioning component one and the positioning component two. The positioning component one and the positioning component two cooperate to adjust the position of the support component. Two supporting components for clamping the plate are arranged on both sides of the supporting component, and a plurality of suction cups are arranged on the supporting component to achieve stable suction of the plate. The supporting component arranged in the fixture can effectively prevent deformation of the plate when drilling; the combined supporting component and the two supporting components increase the supporting area of ​​the plate, and the support is more stable; the fixture clamps the plate in a suction manner, which has less constraints on the shape of the plate and less impact on the plate.

Description

Technical Field

[0001] The invention belongs to the technical field of metal plate processing, and in particular relates to a numerical control drilling positioning fixture suitable for metal thin plate workpieces. Background Art

[0002] In the field of mechanical processing, drilling processing is widely used. Different workpiece fixtures are required when drilling different workpieces. For example, a unique fixture is required when drilling thin plate workpieces. The patent publication number is CN213701897U, and the patent name is a patent document of a special fixture for a lining plate production drilling machine. That is, a fixture for plate drilling processing is disclosed. The fixture can clamp a variety of special-shaped parts. However, when the fixture is used in specific applications, such as clamping metal thin plate workpieces, it is easy to bend and deform due to the thin material of the workpiece during clamping, making the drilling position inaccurate. In addition, metal thin plate workpieces have the characteristics of thin materials, but thin metal materials are generally accompanied by high toughness. When drilling, because the drilling position of the plate is suspended, it is easy to be deformed due to the top movement when the drill bit is running and feeding, and it is not suitable for drilling metal thin plates. Summary of the invention

[0003] In order to solve the problems existing in the above-mentioned background technology, the present invention provides a CNC drilling positioning fixture suitable for metal thin plate workpieces. The fixture is easy to operate, has adjustable size, good supporting effect, and the plate is flat after drilling and the drilling hole position is accurate.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a CNC drilling positioning fixture suitable for metal thin plate workpieces, including a frame, a support component, an adjustment component one, an adjustment component two and two supporting components; the frame is arranged in a rectangular shape, the adjustment component one and the adjustment component two are arranged vertically and crosswise in a horizontal plane, and are slidably installed on the frame, the support component is sleeved at the intersection of the adjustment component one and the adjustment component two, two supporting components for supporting the plate are symmetrically arranged at both ends of the length direction of the frame, the plate is placed on the supporting component, the drilling position is against the upper end surface of the support component, and a through hole for the drill bit to pass through is arranged at the center of the support component, and the adjustment component one and the adjustment component two cooperate to operate so that the position of the support component changes in coordination with the drill bit position.

[0005] The support assembly includes an annular seat, a collar, multiple push-pull blocks, multiple hydraulic rods and multiple torsion bars, and the push-pull blocks, hydraulic rods and torsion bars are set in the same number; the collar is rotatably sleeved on the outside of the annular seat, and multiple hydraulic rods are fixedly mounted on the outer facade of the collar, and the telescopic ends of multiple hydraulic rods all point outward along the radial direction of the collar, and each of the push-pull blocks is fixedly mounted on the telescopic end of each hydraulic rod, and multiple pins are arranged on the upper end surface of the annular seat, and a mounting shaft is arranged on the upper end surface of each push-pull block, and one end of each torsion bar is rotatably sleeved on the mounting shaft, and the other end of the torsion bar is sleeved on the aligned pin, and the other ends of the multiple torsion bars jointly enclose an area that is a through hole for the drill bit to pass through.

[0006] A driving motor is embedded in the annular seat, a driving gear is installed on the driving end of the driving motor, the axis of the driving gear is vertically arranged, the teeth of the driving gear protrude outside the outer circumferential surface of the annular seat, and a tooth groove is arranged on the inner circumferential surface of the ring and the annular seat to match the position of the driving gear, and the teeth of the driving gear are meshed and inserted in the tooth groove.

[0007] The beneficial effects of the present invention are as follows: the clamp is provided with a support component with adjustable through-hole diameter to meet the processing needs of various hole diameters, and at the same time, when the plate is being drilled, it can provide reliable support for the plate to prevent the plate from being deformed during the drilling process, and can ensure the flatness of the plate after processing; the clamp combination is provided with a support component and two supporting components, so that the plate has sufficient supporting area and can be stably supported; the clamp adopts a suction supporting method to clamp the plate, which has less constraints on the shape of the plate and little impact on the plate; in addition, the plate is clamped by a multi-suction cup suction method, which can keep the plate stable during drilling processing and will not deviate, thereby ensuring the accuracy of the drilling hole position. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In the attached picture:

[0009] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0010] Figure 2 It is a schematic diagram of the structure of the supporting assembly of the present invention;

[0011] Figure 3 yes Figure 2 A partial enlarged view of the middle part;

[0012] Figure 4 It is a schematic diagram of the working effect of the support assembly of the present invention;

[0013] Figure 5 It is a schematic diagram of the structure of the support assembly of the present invention;

[0014] Figure 6 It is a schematic diagram of the driving principle of the collar of the present invention;

[0015] In the figure:

[0016] 1. Frame; 2. Support assembly; 3. Positioning assembly 1; 4. Positioning assembly 2; 5. Support assembly; 11. Placement slot; 12. Guide slot 1; 13. Guide slot 2; 14. Clamping slot; 21. Ring seat; 22. Ring; 23. Push-pull block; 24. Hydraulic rod 1; 25. Twist bar; 26. Set seat 1; 27. Set seat 2; 28. Drive motor; 29. ​​Drive gear; 211. Pin rod; 212. Extended support plate; 221. Tooth groove; 231. Mounting shaft; 251. Long round slot; 51. Mounting block; 52. Scissor-type connecting rod; 53. Slide plate; 54. Hydraulic rod 2; 55. Suction cup. DETAILED DESCRIPTION

[0017] The present invention is now described in further detail with reference to the accompanying drawings. The accompanying drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0018] A CNC drilling positioning fixture suitable for metal sheet workpieces, comprising a frame 1, a support component 2, an adjustment component 1 3, an adjustment component 2 4 and two supporting components 5; the frame 1 is set to be rectangular, the adjustment component 1 3 and the adjustment component 2 4 are arranged vertically and crosswise in a horizontal plane, and are slidably installed on the frame 1, the adjustment component 1 3 is arranged along the width direction of the frame 1, the adjustment component 2 4 is arranged along the length direction of the frame 1, the support component 2 is sleeved at the intersection of the adjustment component 1 3 and the adjustment component 2 4, two supporting components 5 for supporting plates are symmetrically arranged at both ends of the length direction of the frame 1, and the upper of the two supporting components 5 A suction cup 55 for holding the metal sheet is arranged on the surface, and the upper end surfaces of the frame 1, the support assembly 2 and the two supporting assemblies 5 are all flush. The sheet is held by the suction cup 55 and placed flatly on the supporting assembly 5, and the drilling position is against the upper end surface of the support assembly 2. A through hole for the drill bit to pass through is arranged at the center of the support assembly 2. The positioning assembly 1 3 and the positioning assembly 2 4 cooperate to make the position of the support assembly 2 change in coordination with the drill bit position. The two supporting assemblies 5 are extended to different lengths to adapt to the placement of metal sheets of different shapes and sizes. The positioning assembly 1 3 and the positioning assembly 2 4 cooperate to drive the support assembly 2 to adjust its position following the specific drilling position.

[0019] The support assembly 2 includes an annular seat 21, a collar 22, a plurality of push-pull blocks 23, a plurality of hydraulic rods 24 and a plurality of torsion bars 25, wherein the push-pull blocks 23, the hydraulic rods 24 and the torsion bars 25 are arranged in the same number; the collar 22 is rotatably sleeved on the outside of the annular seat 21, and the plurality of hydraulic rods 24 are evenly arranged around the axis of the collar 22 and fixedly mounted on the outer facade of the collar 22; the plurality of hydraulic rods 24 are located on the same horizontal plane, and the telescopic ends of the plurality of hydraulic rods 24 all point outward along the radial direction of the collar 22; each of the push-pull blocks 23 is fixedly mounted on the telescopic end of each hydraulic rod 24; the annular seat A plurality of pins 211 having the same number as the hydraulic rod 24 are fixedly arranged on the upper end surface of the annular seat 21, and the plurality of pins 211 are arranged vertically and evenly distributed around the axis of the annular seat 21. A mounting shaft 231 is vertically arranged on the upper end surface of each of the push-pull blocks 23. One end of each of the torsion bars 25 is rotatably sleeved on the mounting shaft 231, and the other end of the torsion bar 25 is sleeved on the aligned pin 211 through an oblong groove 251 provided on the bottom surface. In the initial state, the torsion bar 25 is installed on the mounting shaft 231 and the pin 211 located at the same radius, and the other ends of the plurality of torsion bars 25 commonly enclose an area that is a through hole for the drill bit to pass through.

[0020] A driving motor 28 is embedded in the annular seat 21, and a driving gear 29 is installed on the driving end of the driving motor 28. The axis of the driving gear 29 is vertically arranged, and the teeth of the driving gear 29 protrude outside the outer cylindrical surface of the annular seat 21. A tooth groove 221 is arranged on the inner cylindrical surface of the ring 22 and the annular seat 21 to match the position of the driving gear 29. The teeth of the driving gear 29 are meshed and inserted in the tooth groove 221. The teeth of the driving gear 29 are meshed with the teeth at the bottom of the tooth groove 221. The driving motor 28 is started to operate, and the driving ring 22 rotates on the annular seat 21, and then the multiple torsion bars 25 are pulled by the multiple installation shafts 231 to change their positions, and then the aperture of the through hole is adjusted to adapt to drill bits of various sizes for drilling work.

[0021] The bottom surface of the annular seat 21 is provided with a protruding support plate 212 protruding radially outward, and the lower end surfaces of the plurality of push-pull blocks 23 are all placed on the upper surface of the protruding support plate 212. The protruding support plate 212 supports the plurality of push-pull blocks 23, which can effectively prevent the hydraulic rod 24 from being damaged due to the force on the end when it is extended. By adjusting the hydraulic rod 24 to extend and shorten different lengths, the active radius of the torsion bar 25 can be adjusted, thereby increasing the adjustment range of the through hole diameter, and thus being able to adapt to the drilling and processing of holes of more diameter sizes.

[0022] Each of the supporting components 5 includes a mounting block 51, a scissor-type link 52, a slide plate 53 and a hydraulic rod 54; a placement groove 11 is provided on the upper end surface of the frame 1 along the length direction, and the placement groove 11 is arranged to fit the two inner side walls of the frame 1, and the slide plate 53 sliding frame is placed in the placement groove 11, and a clamping groove 14 is provided on both side walls of the width direction of the frame 1, and the mounting block 51 is embedded in the clamping groove 14, and the scissor-type link 52 is connected and installed between the mounting block 51 and the slide plate 53, and a hydraulic rod 54 is fixedly installed on the side surface of the mounting block 51 facing the slide plate 53, and the telescopic end of the hydraulic rod 54 is fixedly connected to the hinge point of the scissor-type link 52 close to the mounting block 51. The hydraulic rod 54 is extended to different lengths to adjust the scissor-type link 52 to extend to different lengths, thereby adjusting the position of the slide plate 53 to complete the support of the plate to be processed.

[0023] Each of the supporting components 5 also includes a plurality of suction cups 55 and a plurality of air pumps; a plurality of embedding grooves are provided on the upper surface of each of the slide plates 53, and the plurality of suction cups 55 are independently embedded in the plurality of embedding grooves, and the tail end of each of the suction cups 55 is ventilatedly connected to a plurality of air pumps fixedly embedded in the slide plate 53, and each of the air pumps operates independently, so that the plurality of suction cups 55 can be controlled to independently perform the work of holding the plates. Since a plurality of suction cups 55 are provided on both slide plates 53, the device can hold plates of various shapes, and can hold plates of different shapes, without restricting the shape of the plates to be processed.

[0024] The positioning component 1 3 and the positioning component 2 4 both use ball screws to transmit the support component 2. The bottom surface of the annular seat 21 is provided with a set of set seats 1 26 and a set of set seats 2 27. The set seats 1 26 and the set seats 2 27 are vertically distributed to each other. The set seat 1 26 is mounted on the positioning component 1 3, and the set seat 2 27 is mounted on the positioning component 2 4.

[0025] The inner sides of the two side walls of the frame 1 in the length direction are provided with guide grooves 12, and the inner sides of the two side walls of the frame 1 in the width direction are provided with guide grooves 2 13. The two ends of the positioning component 1 3 are slidably inserted in the guide grooves 12, and the two ends of the positioning component 2 4 are slidably inserted in the guide grooves 2 13.

[0026] The positioning component 13 includes two end blocks at both ends, a guiding light rod and a lead screw, the two end blocks are slidably inserted in two guide grooves 12, the light rod and the lead screw are arranged in parallel between the two end blocks, a set of set seats 12 includes two set seats 26, the two set seats 26 are respectively mounted on the lead screw and the light rod, one end of the lead screw is connected to the driving end of the stepper motor, the stepper motor drives the lead screw to rotate to adjust the position of the set seat 12, that is, adjust the position of the support component 2 in the width direction of the frame 1, the positioning component 24 has the same structure as the positioning component 13, a set of set seats 27 includes two set seats 27, the two set seats 27 are respectively mounted on the lead screw and the light rod of the positioning component 24, the stepper motor drives the lead screw to rotate to adjust the position of the set seat 27 on the positioning component 24, that is, adjust the position of the support component 2 in the length direction of the frame 1.

[0027] Working principle:

[0028] Place the whole fixed frame of the device on the workbench of the drilling machine. Adjust the two hydraulic rods 54 to extend to the required length, move the two slides 53 to the required position, place the metal plate to be drilled on the slide 53, adjust the multiple air pumps to operate the suction, make the corresponding suction cups 55 adsorb on the lower surface of the plate, and then stabilize the plate on the device, adjust the drill bit to move to the position to be drilled, and coordinate and adjust the adjustment components 1 3 and 2 4 to work, so that the support component 2 moves to the position aligned with the drill bit, and adjust the aperture of the through hole in the middle of the support component 2 according to the aperture of the hole to be processed.

[0029] When adjusting the through hole diameter, the multiple hydraulic rods 24 can be extended or not. When the multiple hydraulic rods 24 are not extended, and the collar 22 is not rotating and in the initial position, the other ends of the multiple twisting bars 25 are all pointing to the center of the annular seat 21, that is, a through hole for the drill bit to pass through is formed at the center of the annular seat 21. At this time, it is suitable for drilling holes with smaller diameters. The multiple twisting bars 25 can effectively support the plate. According to the increase in the drilling diameter, the driving motor 28 is regulated to operate, so that the collar 22 rotates to further pull the multiple twisting bars 25 to rotate, thereby increasing the through hole diameter. When the hydraulic rods 24 are not extended, the maximum aperture of the through hole is limited. In order to adapt to the processing of a larger aperture value, the multiple hydraulic rods 24 can be regulated to extend. When the hydraulic rods 24 are extended to the maximum extent, the multiple twisting bars 25 can be pulled by the rotation of the collar 22 to make the through hole reach the maximum aperture state.

[0030] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A CNC drilling positioning fixture suitable for metal sheet workpieces, characterized in that: The invention comprises a frame (1), a support assembly (2), a first adjustment assembly (3), a second adjustment assembly (4) and two supporting assemblies (5), wherein the frame (1) is arranged in a rectangular shape, the first adjustment assembly (3) and the second adjustment assembly (4) are arranged vertically and crosswise in a horizontal plane and are slidably mounted on the frame (1), the support assembly (2) is sleeved at the intersection of the first adjustment assembly (3) and the second adjustment assembly (4), two supporting assemblies (5) for supporting plates are symmetrically arranged at both ends of the length direction of the frame (1), the plates are placed on the supporting assemblies (5), the position to be drilled is against the upper end surface of the support assembly (2), a through hole for a drill bit to pass through is arranged at the center of the support assembly (2), the first adjustment assembly (3) and the second adjustment assembly (4) cooperate to operate so that the position of the support assembly (2) changes in coordination with the position of the drill bit; The support assembly (2) comprises an annular seat (21), a collar (22), a plurality of push-pull blocks (23), a plurality of hydraulic rods (24) and a plurality of torsion bars (25), wherein the push-pull blocks (23), the hydraulic rods (24) and the torsion bars (25) are arranged in the same number; the collar (22) is rotatably sleeved on the outer side of the annular seat (21), the plurality of hydraulic rods (24) are fixedly mounted on the outer surface of the collar (22), and the telescopic ends of the plurality of hydraulic rods (24) are all directed outward along the radial direction of the collar (22). On the side, each of the push-pull blocks (23) is fixedly mounted on the telescopic end of each hydraulic rod (24), a plurality of pins (211) are arranged on the upper end surface of the annular seat (21), a mounting shaft (231) is arranged on the upper end surface of each of the push-pull blocks (23), one end of each of the torsion bars (25) is rotatably sleeved on the mounting shaft (231), the other end of the torsion bar (25) is sleeved on the aligned pin (211), and the other ends of the plurality of torsion bars (25) together enclose an area that is a through hole for the drill bit to pass through; A driving motor (28) is embedded in the annular seat (21), a driving gear (29) is mounted on the driving end of the driving motor (28), the axis of the driving gear (29) is vertically arranged, the teeth of the driving gear (29) protrude outside the outer circumferential surface of the annular seat (21), a tooth groove (221) is arranged on the inner circumferential surface of the collar (22) and the annular seat (21) to match the position of the driving gear (29), and the teeth of the driving gear (29) are meshed and inserted in the tooth groove (221); The positioning assembly 1 (3) and the positioning assembly 2 (4) both use a ball screw to transmit the support assembly (2). The bottom surface of the annular seat (21) is provided with a set of sleeve seats 1 (26) and a set of sleeve seats 2 (27). The set of sleeve seats 1 (26) and the set of sleeve seats 2 (27) are vertically distributed to each other. The sleeve seat 1 (26) is sleeved on the positioning assembly 1 (3), and the sleeve seat 2 (27) is sleeved on the positioning assembly 2 (4). The inner sides of the two side walls of the frame (1) in the length direction are each provided with a guide groove 1 (12), and the inner sides of the two side walls of the frame (1) in the width direction are each provided with a guide groove 2 (13). The two ends of the positioning component 1 (3) are slidably inserted into the guide groove 1 (12), and the two ends of the positioning component 2 (4) are slidably inserted into the guide groove 2 (13).

2. The CNC drilling positioning fixture suitable for metal sheet workpieces according to claim 1 is characterized in that: A protruding support plate (212) is provided on the bottom surface of the annular seat (21) protruding outward in the radial direction, and the lower end surfaces of the plurality of push-pull blocks (23) are all placed against the upper surface of the protruding support plate (212).

3. The CNC drilling positioning fixture suitable for metal sheet workpieces according to claim 2 is characterized in that: Each of the supporting components (5) comprises a mounting block (51), a scissor-type connecting rod (52), a slide plate (53) and a second hydraulic rod (54). A placement groove (11) is provided on the upper end surface of the frame (1) along the length direction. The slide plate (53) is slidably mounted in the placement groove (11). Both side walls of the frame (1) in the width direction are provided with a clamping groove (14). The mounting block (51) is embedded in the clamping groove (14). The scissor-type connecting rod (52) is connected and installed between the mounting block (51) and the slide plate (53). The second hydraulic rod (54) is fixedly installed on the side surface of the mounting block (51) facing the slide plate (53). The telescopic end of the second hydraulic rod (54) is fixedly connected to the hinge point of the scissor-type connecting rod (52). The second hydraulic rod (54) can be extended to different lengths to adjust the scissor-type connecting rod (52) to extend to different lengths, thereby adjusting the position of the slide plate (53) to complete the support of the plate.

4. The CNC drilling positioning fixture suitable for metal sheet workpieces according to claim 3 is characterized in that: Each of the supporting components (5) further comprises a plurality of suction cups (55) and a plurality of air pumps; a plurality of mounting grooves are provided on the upper surface of each of the slide plates (53), and the plurality of suction cups (55) are independently mounted in the plurality of mounting grooves; a tail end of each of the suction cups (55) is ventilatedly connected to a plurality of air pumps fixedly mounted in the slide plate (53), and each of the air pumps operates independently.

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