CNC (Computer Numerical Control) machining clamping fixture for LED (Light Emitting Diode) box body

Abstract

The invention discloses a CNC machining clamping fixture for an LED box, and belongs to the technical field of clamping tools, the CNC machining clamping fixture comprises a first machining plate used for clamping the back face of a plate and a second machining plate used for clamping the front face of the plate, a plurality of first clamping pieces used for clamping the plate are installed on the top face of the first machining plate, and a plurality of second clamping pieces used for clamping the plate are installed on the top face of the second machining plate. A plurality of second clamping pieces used for clamping the plate and a plurality of first supporting pieces used for supporting the plate are installed on the top face of the second machining plate, each first supporting piece comprises a plurality of floating roof air cylinders, and the top ends of the floating roof air cylinders abut against the front face of the plate. According to the device, it can be ensured that the plates are always kept stable in the machining or storage process, and damage or deformation of the plates caused by too large local pressure is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of clamping tools, in particular to a CNC machining clamping fixture for an LED box. BACKGROUND

[0002] With the rapid development of LED display technology, LED boxes, as an important part of display systems, are widely used in many fields such as advertising, stage and public display. In order to ensure the assembly precision and quality of the LED display screen, the machining precision of the LED box is extremely strict, especially higher requirements for the stability, accuracy and machining efficiency of the box during the machining process.

[0003] In the machining of the base or related plate of the LED display box, a CNC machining center needs to be used for machining, and general clamps such as flat tongs and magnetic suction cups are generally used. Although the general clamps can adapt to different types of plates, the plates are thin-walled structures and are prone to deformation during the machining process. SUMMARY

[0004] In order to improve the problem of easy deformation of the plate during the machining process, the application provides a CNC machining clamping fixture for an LED box.

[0005] The CNC machining clamping fixture for the LED box provided by the application adopts the following technical scheme: The CNC machining clamping fixture for the LED box comprises a machining plate one for clamping the back surface of a plate and a machining plate two for clamping the front surface of the plate, the top surface of the machining plate one is provided with a plurality of clamping pieces one for clamping the plate, the top surface of the machining plate two is provided with a plurality of clamping pieces two for clamping the plate and a plurality of supporting pieces one for supporting the plate, the supporting pieces one comprise a plurality of floating top cylinders, and the top ends of the floating top cylinders abut against the front surface of the plate.

[0006] By adopting the above technical scheme, the plate is placed on the machining plate one with the front surface upward, the clamping pieces one clamp and fix the back surface of the plate, so as to facilitate the machining of the front surface of the plate; the plate is placed on the machining plate two with the back surface upward, the clamping pieces two clamp and fix the front surface of the plate, so as to facilitate the machining of the back surface of the plate, the floating top cylinders can support the plate, the extension rods on the floating top cylinders can adjust the height according to the deformation amount of the plate, so as to realize the accurate support of the plate, the plate can be effectively prevented from being bent or deformed due to external force, the plate can always be kept stable during the machining or storage process, and the plurality of floating top cylinders can keep uniform support, so as to avoid damage or deformation of the plate caused by excessive local pressure.

[0007] Preferably, the clamping piece one comprises a fixing seat fixed to the top surface of the machining plate one, the top surface of the fixing seat is provided with a clamping block one and a clamping block two for clamping the frame of the plate, a cylinder one for driving the clamping block two to move close to the clamping block one is arranged on the fixing seat, and a plurality of vertical supporting rods are fixed to the top surface of the machining plate one.

[0008] By adopting the above technical scheme, the back surface of the plate is placed on the top surface of the clamping block one, the frame of the plate is located between the clamping block one and the clamping block two, and then the cylinder one is started to drive the clamping block two to move towards the clamping block one, so that the clamping block one and the clamping block two clamp and fix the plate.

[0009] Preferably, the clamping piece two comprises a supporting plate, two supporting blocks are fixed between the bottom surface of the supporting plate and the machining plate two, a supporting cylinder is arranged below the supporting plate, the top end of the piston rod of the supporting cylinder is fixed with a screw rod one, a through groove one for penetrating the screw rod one is arranged at the corner of the front surface of the plate, and the top end of the screw rod one is threadedly connected with a nut one, and the nut one abuts against the back surface of the plate.

[0010] By adopting the above technical scheme, the front surface of the plate is placed above the plurality of floating top cylinders, the screw rod one is penetrated through the through groove one at the corner of the plate, and the nut one is sleeved on the outer periphery of the screw rod one, so that the plate is fixed and limited.

[0011] Preferably, a turnover assembly is arranged between the machining plate one and the machining plate two, the turnover assembly comprises a mounting plate, a turnover plate is arranged on the mounting plate, two connecting blocks are fixed to the top surface of the turnover plate, a rotating rod is rotatably arranged between the two connecting blocks, a connecting plate is fixedly sleeved on the outer periphery of the rotating rod, two moving plates are slidably arranged on the connecting plate, and a plurality of clamping pieces three for clamping the plate are arranged on the moving plates.

[0012] By adopting the above technical scheme, after the plate is processed on the machining plate one, the plate is clamped by the clamping piece three, the rotating rod is rotated by 180°, the moving plate drives the plate to rotate to the upper side of the machining plate two, and the plate is turned over, so that the plate can be continuously processed, and the plate does not need to be manually turned over, and the possibility of bumping during the turning over of the plate is reduced.

[0013] Preferably, a rotating cylinder is fixed to the top surface of the turnover plate, and the end portion of the piston rod of the rotating cylinder is coaxially and fixedly connected with the end portion of the rotating rod.

[0014] By adopting the above technical scheme, the rotating cylinder is started to drive the rotating rod to rotate, the rotating rod drives the connecting plate to rotate, and the connecting plate drives the moving plate to turn over, so that the plate can be turned over.

[0015] Preferably, the top surface of the mounting plate is fixed with a plurality of guide rods, the guide rods pass through the turnover plate, the top surface of the mounting plate is rotatably installed with a height adjusting screw rod, the height adjusting screw rod passes through the turnover plate, and the height adjusting screw rod is in threaded transmission cooperation with the turnover plate.

[0016] By adopting the above technical scheme, the height adjusting screw rod drives the turnover plate to move vertically, thereby adjusting the height of the turnover plate to adapt to the height of the first machining plate and the second machining plate.

[0017] Preferably, the side surface of the connecting plate is provided with a sliding groove, a bidirectional screw rod is rotatably installed in the sliding groove, the moving plate is in sliding cooperation with the connecting plate along the length direction of the connecting plate, the moving plate is sleeved on the outer periphery of the bidirectional screw rod, the bidirectional screw rod is in threaded transmission cooperation with the moving plate, a motor is installed on the connecting plate, and the output end of the motor is in threaded transmission cooperation with the end portion of the bidirectional screw rod.

[0018] By adopting the above technical scheme, the motor is started, the motor drives the bidirectional screw rod to rotate, and the bidirectional screw rod drives the two moving plates to move towards the direction close to the plate material, so that the clamping piece clamps and fixes the plate material.

[0019] Preferably, the opposite inner sides of the two moving plates are respectively provided with a plurality of moving blocks, the clamping piece three includes an installation block, the installation block is fixed with a pneumatic clamping jaw, the moving block is clamped and fixed with the installation block, and the moving plate is provided with an adjusting piece for adjusting the position of the moving block.

[0020] By adopting the above technical scheme, the installation block and the moving block are clamped and fixed, so as to facilitate the maintenance and replacement of the pneumatic clamping jaw, the position of the moving block can be adjusted by using the adjusting piece, so that the pneumatic clamping jaw can adapt to different plate materials, and the smoothness of the plate turnover is ensured.

[0021] Preferably, the opposite inner sides of the two moving plates are respectively provided with a plurality of moving blocks, the clamping piece three includes an installation block, the installation block is fixed with a pneumatic clamping jaw, the moving block is clamped and fixed with the installation block, and the moving plate is provided with an adjusting piece for adjusting the position of the moving block.

[0022] By adopting the above technical solution, after moving the moving block to a suitable position, tighten nut two to fix the moving block to the moving plate.

[0023] Preferably, the movable block has a mounting groove on its side for inserting the mounting block, and a slot communicating with the mounting groove on its side. The movable block slides and mounts a mounting block through the slot. The mounting block has a snap-fit ​​groove on its side for inserting the mounting block. The mounting block has an inclined surface on its side near the mounting block. A limiting block is fixed on the side of the mounting block. A limiting groove is formed on the inner wall of the slot. The limiting block slides and engages with the movable block through the limiting groove. A spring is fixed on the side of the limiting block away from the mounting block. The end of the spring away from the limiting block is fixedly connected to the limiting groove.

[0024] By adopting the above technical solution, the mounting block is inserted into the mounting groove, and the mounting block abuts against the inclined surface, so that the locking block enters the locking groove. When the mounting block is fully inserted into the mounting groove, the locking block is inserted into the locking groove under the elastic force of the spring, so that the mounting block and the moving block are locked and fixed.

[0025] In summary, this application includes at least one of the following beneficial technical effects: Place the sheet material face up on processing plate one, and clamping piece one clamps and fixes the back of the sheet material to facilitate processing of the face. Place the sheet material back up on processing plate two, and clamping piece two clamps and fixes the face of the sheet material to facilitate processing of the back. The floating top cylinder can support the sheet material, and the telescopic rod on the floating top cylinder can adjust the height according to the deformation of the sheet material, thereby achieving precise support for the sheet material. This can effectively prevent the sheet material from bending or deforming due to external forces, ensuring that the sheet material remains stable during processing or storage. Several floating top cylinders can maintain uniform support and avoid damage or deformation of the sheet material caused by excessive local pressure. Place the back of the board on the top surface of clamping block one, with the edge of the board located between clamping block one and clamping block two. Then activate cylinder one, which will move clamping block two toward the direction of clamping block one, and clamping block one and clamping block two will clamp and fix the board. Place the front of the plate above several floating roof cylinders, then pass the screw through the through groove at the corner of the plate, and then place a nut on the outer circumference of the screw to limit and fix the plate. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the machining plate in the CNC machining clamping fixture for LED cabinets according to an embodiment of this application.

[0027] Figure 2This is a schematic diagram of the second processing plate in the CNC machining fixture for LED cabinets according to an embodiment of this application.

[0028] Figure 3 This is a schematic diagram of the structure of a clamping component one in a CNC machining clamping fixture for LED cabinets according to an embodiment of this application.

[0029] Figure 4 This is a schematic diagram of the structure of clamping member two and support member one in the CNC machining clamping fixture for LED cabinets according to an embodiment of this application.

[0030] Figure 5 This is a schematic diagram of the flipping component in the CNC machining clamping fixture for LED cabinets according to an embodiment of this application.

[0031] Figure 6 This is a schematic diagram of the connecting plate and the moving plate in the CNC machining clamping fixture for LED cabinets according to an embodiment of this application.

[0032] Figure 7 This is a schematic diagram of the moving block and clamping component three in the CNC machining fixture for LED cabinets according to an embodiment of this application.

[0033] Figure 8 This is a cross-sectional view of the moving block in the CNC machining clamping fixture for LED cabinets according to an embodiment of this application.

[0034] Reference numerals: 1. Processing plate one; 11. Support rod; 2. Processing plate two; 3. Clamping component one; 31. Fixed base; 32. Clamping block one; 33. Clamping block two; 34. Cylinder one; 4. Clamping component two; 41. Support plate; 42. Support block; 43. Support cylinder; 44. Screw one; 45. Nut one; 5. Support component one; 51. Floating top cylinder; 6. Tilting assembly; 61. Mounting plate; 62. Tilting plate; 63. Guide rod; 64. Height adjustment screw; 65. Connecting block; 66. Rotating rod ; 67. Rotary cylinder; 7. Connecting plate; 71. Slide groove; 72. Double-acting lead screw; 73. Motor; 8. Moving plate; 81. Moving block; 811. Mounting groove; 812. Slot; 813. Slotting block; 814. Inclined surface one; 815. Limiting block; 816. Limiting groove; 817. Spring one; 82. Moving groove; 83. Sliding block; 84. Sliding groove; 85. Screw two; 86. Nut two; 87. Clearance groove; 9. Clamping component three; 91. Mounting block; 92. Pneumatic gripper; 93. Snap-fit ​​groove. Detailed Implementation

[0035] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0036] This application discloses a CNC machining fixture for LED cabinets. (Refer to...) Figure 1 and Figure 2 The CNC machining clamping fixture for LED cabinets is used to clamp the back of the plate (processing plate 1) and the front of the plate (processing plate 2). The top surface of processing plate 1 is equipped with several clamping parts 3 for clamping the plate, and the top surface of processing plate 2 is equipped with several clamping parts 4 for clamping the plate and several supporting parts 5 for supporting the plate 41.

[0037] Reference Figure 1 and Figure 3 Four vertically arranged support rods 11 are fixed to the top surface of the processing plate 1, and the four support rods 11 are located at the corners of the processing plate 1. The clamping component 3 includes a fixed seat 31 fixed to the top surface of the processing plate 1, and a plurality of fixed seats 31 are spaced apart along the periphery of the processing plate 1. A clamping block 32 and a clamping block 33 are mounted on the top surface of the fixed seat 31. The clamping block 32 and the clamping block 33 are used to clamp the edge of the plate, and a cylinder 34 is mounted on the fixed seat 31 to drive the clamping block 33 closer to the clamping block 32.

[0038] Place the back of the board on the top surface of clamping block 32. The edge of the board is located between clamping block 32 and clamping block 33. Then start cylinder 34. Cylinder 34 drives clamping block 33 to move towards clamping block 32. Clamping block 32 and clamping block 33 clamp and fix the board.

[0039] Reference Figure 2 and Figure 4 The support component 5 includes several floating top cylinders 51, the top of which abuts against the front of the plate. These floating top cylinders 51 are evenly distributed in the middle of the processing plate 2. The telescopic rods on the floating top cylinders 51 can adjust their height according to the deformation of the plate, thus achieving precise support and effectively preventing bending or deformation due to external forces. The clamping component 4 includes a support plate 41, with two support blocks 42 fixed between the bottom surface of the support plate 41 and the processing plate 2. Support cylinders 43 are installed below the support plate 41, with several support cylinders 43 located on both sides of the top surface of the processing plate 2. Floating top cylinders 51 are positioned between adjacent support cylinders 43. A screw 44 is fixed to the top of the piston rod of the support cylinder 43. Through slots for the screw 44 are provided at the corners of the front of the plate. A nut 45 is threaded onto the top of the screw 44, and the nut 45 abuts against the back of the plate. The front of the plate is placed above several floating roof cylinders 51. Then, the screw 44 is passed through the through groove at the corner of the plate. Finally, the nut 45 is fitted onto the outer circumference of the screw 44 to limit and fix the plate.

[0040] ReferenceFigure 5 and Figure 6 A flipping assembly 6 is provided between processing plate 1 and processing plate 2. The flipping assembly 6 includes a horizontally mounted mounting plate 61, on which a flipping plate 62 is mounted. Several guide rods 63 are fixed to the top surface of the mounting plate 61, and the guide rods 63 pass through the flipping plate 62. A height adjusting screw 64 is rotatably mounted on the top surface of the mounting plate 61, passing through the flipping plate 62, and the height adjusting screw 64 is threadedly engaged with the flipping plate 62. Rotating the height adjusting screw 64 causes the flipping plate 62 to move vertically, thereby adjusting the height of the flipping plate 62 to accommodate the heights of processing plate 1 and processing plate 2.

[0041] Reference Figure 5 and Figure 6 Two connecting blocks 65 are fixed to the top surface of the flip plate 62, and a rotating rod 66 is rotatably mounted between the two connecting blocks 65. A rotary cylinder 67 is fixed to the top surface of the flip plate 62, and the piston rod end of the rotary cylinder 67 is coaxially and fixedly connected to the end of the rotating rod 66. A connecting plate 7 is sleeved and fixed to the outer periphery of the rotating rod 66, and two movable plates 8 are slidably mounted on the connecting plate 7. Several clamping parts 9 for clamping the plate are mounted on the movable plates 8.

[0042] After the sheet material is processed on processing plate 1, clamping component 3 9 is used to clamp the sheet material. Rotary cylinder 67 is started, which drives rotating rod 66 to rotate. Rotating rod 66 drives connecting plate 7 to rotate. Connecting plate 7 drives moving plate 8 to flip. Moving plate 8 drives the sheet material to rotate above processing plate 2, completing the flipping of the sheet material, so as to facilitate the subsequent processing of the sheet material.

[0043] Reference Figure 5 and Figure 6 A sliding groove 71 is provided on the side of the connecting plate 7, and the movable plate 8 slides along the length of the connecting plate 7 through the sliding groove 71. A bidirectional lead screw 72 is rotatably installed in the sliding groove 71, and the movable plate 8 is sleeved on the outer circumference of the bidirectional lead screw 72, with the bidirectional lead screw 72 and the movable plate 8 in a threaded connection. A motor 73 is installed on the connecting plate 7, and the output end of the motor 73 is in a threaded connection with the end of the bidirectional lead screw 72. When the motor 73 is started, the motor 73 drives the bidirectional lead screw 72 to rotate, and the bidirectional lead screw 72 drives the two movable plates 8 to move towards the material, so that the clamping device can clamp and fix the material.

[0044] Reference Figure 6 and Figure 7Several moving blocks 81 are respectively installed on the inner sides of the two moving plates 8. The clamping component 3 9 includes a mounting block 91, on which a pneumatic gripper 92 is fixed. The moving blocks 81 are snapped and fixed to the mounting block 91. Moving grooves 82 are respectively opened on the inner sides of the two moving plates 8. The moving blocks 81 slide and engage with the moving plates 8 along the length direction of the moving plates 8 through the moving grooves 82. Sliding blocks 83 are fixed on both sides of the moving blocks 81. Sliding grooves 84 are opened on the inner wall of the moving grooves 82. The sliding blocks 83 slide and engage with the moving plates 8 along the length direction of the moving plates 8 through the sliding grooves 84. Screws 2 85 are fixed on the sides of the two moving plates 8 that are far apart from each other. The sides of the moving plates 8 have relief grooves 87 that communicate with the moving grooves 82. The screws 2 85 pass through the relief grooves 87. Nuts 2 86 are threadedly connected to the outer circumference of the screws 2 85. Nuts 2 86 abut against the moving plates 8. After moving the movable block 81 to a suitable position, tighten the second nut 86 to fix the movable block 81 to the movable plate 8, so that the pneumatic gripper 92 can be moved to a position that is convenient for clamping the plate.

[0045] Reference Figure 7 and Figure 8 The movable block 81 has a mounting groove 811 on its side for inserting the mounting block 91, and a slot 812 on its side that communicates with the mounting groove 811. A locking block 813 is slidably mounted on the movable block 81 through the slot 812. The mounting block 91 has a locking groove 93 on its side for inserting the locking block 813, and a slope 814 is provided on the side of the locking block 813 near the mounting block 91. A limiting block 815 is fixed to the side of the locking block 813, and a limiting groove 816 is provided on the inner wall of the slot 812. The limiting block 815 slides and engages with the movable block 81 through the limiting groove 816. A spring 817 is fixed to the side of the limiting block 815 away from the mounting block 91, and the end of the spring 817 away from the limiting block 815 is fixedly connected to the limiting groove 816.

[0046] Insert the mounting block 91 into the mounting groove 811. The mounting block 91 abuts against the inclined surface 814, causing the locking block 813 to enter the locking groove 812. When the mounting block 91 is fully inserted into the mounting groove 811, the locking block 813 is inserted into the locking groove 93 under the elastic force of the spring 817, so that the mounting block 91 and the moving block 81 are locked together and fixed.

[0047] The implementation principle of a CNC machining clamping fixture for LED cabinets in this application embodiment is as follows: The sheet metal is placed face up on the processing plate 1, and the clamping component 3 clamps and fixes the back of the sheet metal to facilitate processing of the face of the sheet metal; the sheet metal is placed back up on the processing plate 2, and the clamping component 4 clamps and fixes the face of the sheet metal to facilitate processing of the back of the sheet metal; the floating top cylinder 51 can support the sheet metal, and the telescopic rod on the floating top cylinder 51 can adjust the height according to the deformation of the sheet metal, thereby achieving precise support for the sheet metal, which can effectively prevent the sheet metal from bending or deforming due to external force, ensuring that the sheet metal remains stable during processing or storage; several floating top cylinders 51 can maintain uniform support and avoid damage or deformation of the sheet metal caused by excessive local pressure.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A CNC machining clamping fixture for LED boxes, characterized by: The utility model provides a processing plate (1) for clamping the back of plate and processing plate two (2) for clamping the front of plate, the top of processing plate one (1) is equipped with a plurality of clamping piece one (3) for clamping plate, the top of processing plate two (2) is equipped with a plurality of clamping piece two (4) for clamping plate and a plurality of support piece one (5) for supporting plate (41), the support piece one (5) includes a plurality of floating roof air cylinder (51), the top of floating roof air cylinder (51) and the front of plate abut.

2. A CNC machining clamping fixture for LED boxes according to claim 1, characterized in that: The clamping piece one (3) includes a fixed seat (31) fixed to the top of the processing plate one (1), the top of the fixed seat (31) is equipped with a clamping block one (32) and a clamping block two (33), the clamping block one (32) and the clamping block two (33) are used to clamp the frame of plate, the fixed seat (31) is equipped with a cylinder one (34) for driving the clamping block two (33) to be close to the clamping block one (32), and the top of the processing plate one (1) is fixed with a plurality of vertically arranged support rods (11).

3. A CNC machining clamping fixture for LED boxes according to claim 1, characterized in that: The clamping piece two (4) includes a support plate (41), two support blocks (42) are fixed between the bottom of the support plate (41) and the processing plate two (2), a support cylinder (43) is installed below the support plate (41), a threaded rod one (44) is fixed to the top end of the piston rod of the support cylinder (43), a through groove one for penetrating the threaded rod one (44) is formed at the corner of the front of plate, a nut one (45) is threadedly connected to the top end of the threaded rod one (44), and the nut one (45) abuts against the back of plate.

4. The CNC machining clamping fixture for LED box according to claim 1, characterized in that: A turnover assembly (6) is arranged between the processing plate one (1) and the processing plate two (2), the turnover assembly (6) includes a mounting plate (61), a turnover plate (62) is arranged on the mounting plate (61), two connecting blocks (65) are fixed to the top of the turnover plate (62), a rotating rod (66) is rotatably installed between the two connecting blocks (65), a connecting plate (7) is fixedly sleeved on the outer periphery of the rotating rod (66), two moving plates (8) are slidably installed on the connecting plate (7), and a plurality of clamping pieces three (9) for clamping plate are installed on the moving plates (8).

5. A CNC machining clamping fixture for LED boxes according to claim 4, characterized in that: A rotating cylinder (67) is fixed to the top of the turnover plate (62), and the end portion of the piston rod of the rotating cylinder (67) is coaxially and fixedly connected with the end portion of the rotating rod (66).

6. A CNC machining clamping fixture for LED boxes according to claim 4, characterized in that: A plurality of guide rods (63) are fixed to the top of the mounting plate (61), the guide rods (63) penetrate through the turnover plate (62), a height adjusting screw rod (64) is rotatably installed on the top of the mounting plate (61), the height adjusting screw rod (64) penetrates through the turnover plate (62), and the height adjusting screw rod (64) is threadedly and drivingly connected with the turnover plate (62).

7. A CNC machining clamping fixture for LED boxes according to claim 4, characterized in that: The side of the connecting plate (7) is provided with a sliding groove (71), a bidirectional screw rod (72) is rotatably installed in the sliding groove (71), the moving plate (8) is slidably connected with the connecting plate (7) along the length direction of the connecting plate (7) through the sliding groove (71), the moving plate (8) is sleeved on the outer periphery of the bidirectional screw rod (72), the bidirectional screw rod (72) is threadedly connected with the moving plate (8), and a motor (73) is installed on the connecting plate (7). The output end of the motor (73) is threadedly connected with the end of the bidirectional screw rod (72).

8. A CNC machining clamping fixture for LED boxes according to claim 4, characterized in that: The opposite inner sides of the two moving plates (8) are respectively provided with a plurality of moving blocks (81), the clamping piece three (9) comprises an installation block (91), the installation block (91) is fixedly provided with a pneumatic clamping jaw (92), the moving block (81) is clamped and fixed with the installation block (91), and the moving plate (8) is provided with an adjusting piece for adjusting the position of the moving block (81).

9. A CNC machining clamping fixture for an LED enclosure according to claim 8, characterized in that: The opposite inner sides of the two moving plates (8) are respectively provided with a moving groove (82), the moving block (81) is slidably connected with the moving plate (8) along the length direction of the moving plate (8) through the moving groove (82), the two sides of the moving block (81) are respectively fixedly provided with a sliding block (83), the inner wall of the moving groove (82) is provided with a sliding groove (84), the sliding block (83) is slidably connected with the moving plate (8) along the length direction of the moving plate (8) through the sliding groove (84), and the adjusting piece comprises a second screw rod (85) fixed on the side of the moving plate (8). The side of the moving plate (8) is provided with a gap groove (87) in communication with the moving groove (82), the second screw rod (85) penetrates through the gap groove (87), the outer periphery of the second screw rod (85) is threadedly connected with a second nut (86), and the second nut (86) abuts against the moving plate (8).

10. The CNC machining clamping fixture for LED boxes according to claim 8, characterized in that: The side of the moving block (81) is provided with an installation groove (811) for inserting the installation block (91), the side of the moving block (81) is provided with a clamping groove (812) in communication with the installation groove (811), the moving block (81) is slidably provided with a clamping block (813) through the clamping groove (812), the side of the installation block (91) is provided with a clamping groove (93) for inserting the clamping block (813), the side of the clamping block (813) close to the installation block (91) is provided with an inclined surface (814), the side of the clamping block (813) is fixedly provided with a limiting block (815), the inner wall of the clamping groove (812) is provided with a limiting groove (816), the limiting block (815) is slidably connected with the moving block (81) through the limiting groove (816), the side of the limiting block (815) away from the installation block (91) is fixedly provided with a first spring (817), and one end of the first spring (817) away from the limiting block (815) is fixedly connected with the limiting groove (816).

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