Tool clamp for numerical control cutting machine

Abstract

The invention relates to the technical field of tool clamps, in particular to a tool clamp for a numerical control cutting machine, which comprises a guide rail, and two clamping mechanisms oppositely distributed left and right and a supporting mechanism positioned between the two clamping mechanisms are mounted on the guide rail. The clamping mechanism comprises a cross beam installed on the guide rail in a left-right sliding mode, and a plurality of spinning assemblies distributed at equal intervals in the front-back direction, a plurality of side pressing assemblies corresponding to the spinning assemblies in a one-to-one mode and a temple assembly are installed on the cross beam. Through mutual cooperation of the spinning assembly, the elastic pressing assembly, the side pressing assembly and the limiting mechanism, multi-directional clamping limiting, position calibration and edge supporting of a blank are integrally achieved under the same drive, meanwhile, a middle support is further matched, the accuracy and firmness of blank position fixing are improved, and the production efficiency is improved. And the blank cutting efficiency and quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tooling fixtures, in particular to a tooling fixture for a numerically controlled cutting machine. Background Art

[0002] A CNC cutting machine is a device that drives the movement of a machine tool through a digital program to cut a workpiece. It is equipped with a fixture for fixing the blank to be cut to ensure the stability of the blank during cutting. The common fixtures used for plate blanks (hereinafter referred to as blanks) consist of two parallel beams and a number of clamps that can move up and down on the beams. The beams can be movably installed on the workbench. The beams are used to support the left and right ends of the blank, and the pressure blocks are used to press the two ends of the blank to fix the blank on the workbench. Then the cutting machine cuts the blank between the left and right beams. When cutting, usually a number of slots of specific shapes are cut on the blank first, and then the edge of the entire blank is cut around.

[0003] However, the above-mentioned fixtures have the following problems during use: 1. The distance between the beams is only roughly adjusted according to the size of the blank to ensure that the beams can support the blank, but the left and right positions of the blank between the beams still need to be adjusted manually, and the front and back positions of the blank are also prone to deviations, which not only affects the efficiency of the blank clamping and fixing, but also affects the accuracy of the blank fixing position, and then affects the quality of the blank cutting and forming; 2. Since the beams only support the left and right ends, when the edge of the blank is cut in a circumferential manner, the cut part will be separated from the edge waste clamped by the clamping block and lose the corresponding support. Then, in the absence of additional targeted bottom support, the cut part will deviate downward under the action of its own gravity, causing the cutting edge to bend and deform, affecting the quality of the workpiece cutting and forming. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a fixture for a CNC cutting machine, comprising a guide rail, on which are mounted two clamping mechanisms that are relatively distributed left and right and a supporting mechanism located between the two clamping mechanisms.

[0005] The clamping mechanism includes a crossbeam slidably mounted on a guide rail, the crossbeam and the guide rail are locked by bolts, the guide rail is mounted on the workbench of an existing CNC cutting machine, and the crossbeam is mounted with a number of spinning components equidistantly distributed front and back, a number of side pressure components corresponding to the spinning components one by one, and a side support component.

[0006] The spinning assembly includes a movable rod that slides up and down on the crossbeam, an elastic clamping assembly is arranged on the top of the movable rod, a side pressure assembly includes a side pressure frame that slides left and right on the crossbeam and is used to implement lateral clamping, and a side support assembly includes a support block that moves synchronously with the side pressure frame and is used to implement edge support. After the movable rod moves down to make the elastic clamping assembly implement elastic clamping, the movable rod continues to move down to make the side pressure frame and the support block move synchronously, the side pressure frame implements left and right centering clamping, the support block moves to the edge support point, and the elastic clamping of the elastic clamping assembly is converted into rigid clamping. The support mechanism includes a support plate located in the middle of the left and right crossbeams and used to implement middle support, and a follow-up adjustment assembly that keeps the support plate in the center. A limiting mechanism for blocking and limiting the rear side of the blank is also installed on the crossbeam; a moving assembly that drives the movable rod to move up and down is installed below the guide rail.

[0007] In a possible implementation, the spinning assembly also includes a through hole opened on the crossbeam and passing through from top to bottom, the movable rod is movably installed inside the through hole, a guide component for guiding the movable rod to rotate 180 degrees and move downward is installed on the inner ring wall of the through hole, a connecting rod 1 is arranged below the crossbeam, and the bottom ends of several movable rods located on the same crossbeam are all rotatably connected to the corresponding connecting rod 1. The moving assembly includes an electric push rod arranged below the connecting rod 1, the top of the telescopic section of the electric push rod is fixedly connected to the connecting rod 2, the connecting rod 1 is slidably installed on the top of the connecting rod 2, the bottoms of the left and right ends of the connecting rod 2 are fixedly connected to elastic telescopic rods, and the electric push rod and the elastic telescopic rod are both fixedly installed on the workbench of the CNC cutting machine.

[0008] In one possible implementation, the guide component includes two guide grooves opened on the inner ring wall of the through hole and distributed circumferentially, and a guide block corresponding to and cooperating with the guide grooves is fixedly connected to the outer ring wall of the movable rod. The guide groove is composed of two vertical grooves distributed up and down and parallel to each other left and right, and a spiral groove connected between the two vertical grooves, and the two spiral grooves corresponding to the same through hole have different rotation directions.

[0009] In one possible implementation, the elastic clamping assembly includes an upper pressure block fixedly connected to the top of the movable rod, a lower pressure block located between the left and right movable rods is slidably installed at the bottom of the upper pressure block, a spring is fixedly connected between the top of the lower pressure block and the inner wall of the upper pressure block, and the lower pressure block is located above the cross beam.

[0010] In one possible implementation, the side pressure frame is sleeved on the outside of the corresponding movable rod, and a wedge block 1 located above the side pressure frame is fixedly connected to the outer ring wall of the movable rod, and a baffle plate located on the inner side of the side pressure frame is fixedly connected to the top of the crossbeam, and the baffle plate is located on the side of the movable rod away from the support plate, and a spring 2 is fixedly connected between the side of the baffle plate away from the support plate and the inner wall of the side pressure frame.

[0011] In one possible implementation, the side pressure assembly also includes a limit block fixedly connected to the top of the side pressure frame and located on the side of the movable rod close to the support plate, the top of the limit block slidingly cooperates with the inclined surface of the bottom of the wedge block, the limit block is fixedly connected with teeth on the side away from the corresponding movable rod, and the lower pressure block is provided with a tooth groove on the side close to the corresponding movable rod, and the teeth are engaged with the tooth groove.

[0012] In one possible implementation, the side support assembly also includes a concave frame fixedly connected to the bottom of the cross beam, the horizontal section of the concave frame is located between the cross beam and the connecting rod, the bottom end of the movable rod passes through the horizontal section of the concave frame, and the top of the concave frame is slidably installed with a plurality of trapezoidal brackets corresponding to the movable rods one by one, the support block is fixedly connected to the top of the trapezoidal bracket and is located between the left and right cross beams, the top of the support block is flush with the top of the cross beam, and the top of the trapezoidal bracket is fixedly connected to the corresponding side pressure frame.

[0013] In one possible implementation, the two horizontal sections of the trapezoidal bracket are both provided with through grooves, the cross beam is slidably connected to the upper through groove, the movable rod is movably connected to the lower through groove, the length of the upper through groove is greater than the length of the lower through groove, and a wedge block 2 located above the lower through groove is fixedly connected to the outer ring wall of the movable rod, and the inclined surface of the lower end of the wedge block 2 cooperates with the inclined inner wall of the trapezoidal bracket close to the support block.

[0014] In one possible implementation, the follow-up adjustment assembly includes a slide fixedly connected to the bottom of both ends of the support plate, the slide is installed on the guide rail for left and right sliding, and two scissor-type telescopic frames symmetrically distributed about the front and back of the support plate are commonly connected between the left and right cross beams, and the middle part of the scissor-type telescopic frame is rotatably connected to the corresponding slide.

[0015] In one possible implementation, the limiting mechanism includes a slide groove opened on the top of the beam, a slider is installed inside the slide groove for sliding back and forth, a limiting plate is fixedly connected to the top of the slider, and the slider is locked to the beam by a bolt knob.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention realizes multi-directional clamping and limiting, position calibration and edge support of the blank in an integrated manner under the same drive through the mutual cooperation of the spinning component, the elastic pressing component, the side pressure component and the limiting mechanism, and is also equipped with a middle support, which not only improves the accuracy and firmness of the blank position fixation, but also improves the blank cutting efficiency and quality.

[0017] 2. The present invention utilizes a limiting mechanism to block and limit the rear side of the blank, utilizes a spinning assembly to drive an elastic clamping assembly to initially elastically clamp the blank, and then the spinning assembly continues to drive the side pressure assembly to centrally clamp the blank from both sides of the blank, while simultaneously clamping and limiting the elastic clamping assembly, and changing the elastic clamping assembly from elastic clamping to rigid clamping.

[0018] 3. The present invention supports the blank at multiple points through the cooperation of the crossbeam, the side support assembly and the supporting mechanism; the crossbeam and the side support assembly respectively support the blank on both sides of the cutting trajectory, which on the one hand improves the stability of the blank during the clamping process, and on the other hand ensures that the blank is always under the action of effective and evenly distributed support forces at multiple points during the cutting process, thereby effectively improving the cutting quality.

[0019] 4. In the present invention, when the spinning assembly drives the side pressure assembly to center and clamp the blank, the spinning assembly will simultaneously push the side support assembly to move a certain distance toward the support plate, so that the support block and the crossbeam are spaced a certain distance apart. At this time, the blank is located between the support block and the crossbeam around the cutting trajectory, thereby ensuring the implementation of double-sided support and preventing the support block from being damaged by cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention when in use.

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the mobile assembly of the present invention.

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the clamping mechanism of the present invention.

[0024] Figure 5 It is a cross-sectional view of the clamping mechanism of the present invention.

[0025] Figure 6 It is a partial cross-sectional view of the elastic pressing component and the side pressure component of the present invention.

[0026] Figure 7 It is a cross-sectional view of the through hole of the present invention.

[0027] Figure 8 It is a schematic diagram of the process of the clamping mechanism of the present invention clamping the blank.

[0028] Fig. 9 It is a three-dimensional structural schematic diagram of the limiting mechanism of the present invention.

[0029] Fig.10 It is a schematic diagram of the circular cutting trajectory of the blank.

[0030] In the figure: 1, guide rail; 2, clamping mechanism; 21, crossbeam; 22, spinning assembly; 221, through hole; 222, guide groove; 223, movable rod; 224, guide block; 225, connecting rod 1; 23, elastic pressing assembly; 231, upper pressing block; 232, lower pressing block; 233, spring 1; 24, side pressure assembly; 241, side pressure frame; 242, limit block; 243, wedge block 1; 244, baffle; 24 5. Spring 2; 25. Side support assembly; 251. Concave frame; 252. Trapezoidal bracket; 253. Support block; 254. Through slot; 255. Wedge block 2; 26. Moving assembly; 261. Electric push rod; 262. Connecting rod 2; 263. Elastic telescopic rod; 3. Support mechanism; 31. Support plate; 32. Sliding seat; 33. Scissor telescopic frame; 4. Limiting mechanism; 41. Sliding slot; 42. Sliding block; 43. Limiting plate. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0032] See also Figure 1 , Figure 2 and Figure 3 A fixture for a CNC cutting machine includes a guide rail 1, on which two clamping mechanisms 2 are installed, which are relatively distributed on the left and right sides, and a supporting mechanism 3 located between the two clamping mechanisms 2. It should be noted that when in use, the guide rail 1 is installed on the workbench of the existing CNC cutting machine.

[0033] See also Figure 1 , Figure 3 , Figure 4 and Figure 5The clamping mechanism 2 includes a crossbeam 21 arranged on the guide rail 1, the crossbeam 21 is locked with the guide rail 1 by bolts, a plurality of spinning assemblies 22 equidistantly distributed in the front and rear and a plurality of side pressure assemblies 24 corresponding to the spinning assemblies 22 are installed on the crossbeam 21, the side pressure assemblies 24 clamp the side of the blank under the drive of the corresponding spinning assemblies 22, an elastic pressing assembly 23 for elastically pressing the blank is installed on the spinning assemblies 22, the side pressure assemblies 24 clamp the elastic pressing assembly 23 while clamping the side plate, and the side support assembly 25 for edge support of the blank under the drive of the spinning assembly 22 is also installed on the crossbeam 21, a moving assembly 26 for driving the spinning assembly 22 to move up and down is installed below the guide rail 1, and the area at the top of the crossbeam 21 and between the corresponding side pressure assemblies 24 on the left and right is the clamping station. A limiting mechanism 4 for blocking and limiting the rear side of the blank is also installed on the crossbeam 21. The support mechanism 3 includes a support plate 31 located in the middle of the left and right beams 21, and a follow-up adjustment component for keeping the support plate 31 centered is installed between the left and right beams 21. When the left-right dimensions of the blank change, the right beam 21 is moved, and a scale line is provided on the guide rail 1 to indicate the left-right moving position of the right beam 21, and the left beam 21 is basically continuously locked on the left side of the workbench.

[0034] See also Figure 5 , Figure 6 and Figure 7 The spinning assembly 22 includes a through hole 221 which is opened on the cross beam 21 and passes through the cross beam 21 from top to bottom. A movable rod 223 is movably installed inside the through hole 221. A guiding component for guiding the movable rod 223 to rotate 180 degrees and move downward is installed on the inner ring wall of the through hole 221. A connecting rod 225 is arranged below the cross beam 21. The bottom ends of several movable rods 223 located on the same cross beam 21 are rotatably connected to the corresponding connecting rod 225.

[0035] See also Figure 5 , Figure 6 and Figure 7 The guide component includes two guide grooves 222 which are opened on the inner ring wall of the through hole 221 and distributed circumferentially. A guide block 224 which corresponds to and cooperates with the guide grooves 222 is fixedly connected to the outer ring wall of the movable rod 223. The guide groove 222 is composed of two vertical grooves which are distributed up and down and parallel to each other left and right and a spiral groove connected between the two vertical grooves. The spiral grooves in the two guide grooves 222 have different rotation directions.

[0036] See also Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 7 and Figure 8Before clamping the blank, the elastic pressing assembly 23 rotates to the outside of the clamping station to facilitate placing the blank in the clamping station. When clamping the blank, the movable rod 223 is driven downward by the moving assembly 26, so that the movable rod 223 drives the elastic pressing assembly 23 to move downward to elastically clamp the blank. During the downward movement of the movable rod 223, the guide block 224 first moves downward along the upper vertical groove of the corresponding guide groove 222, so that the movable rod 223 moves downward a short distance, and then the guide block 224 moves downward along the spiral groove of the guide groove 222, so that the movable rod 223 moves downward while rotating, and finally, under the guidance of the spiral groove, the movable rod 223 rotates 180°, and then the guide block 224 moves downward along the lower vertical groove of the guide groove 222, so that the movable rod 223 moves downward and drives the elastic pressing assembly 23 to press the blank.

[0037] See also Figure 4 , Figure 5 and Figure 6 The elastic clamping assembly 23 includes an upper pressing block 231 fixedly connected to the top of the movable rod 223, and a lower pressing block 232 located between the left and right movable rods 223 is slidably installed at the bottom of the upper pressing block 231, and a spring 233 is fixedly connected between the top of the lower pressing block 232 and the inner wall of the upper pressing block 231, and the lower pressing block 232 is located above the beam 21.

[0038] See also Figure 4 , Figure 5 and Figure 6 The side pressure assembly 24 includes a side pressure frame 241 which is slidably installed on the top of the beam 21 and sleeved on the outside of the corresponding movable rod 223. A wedge block 243 located above the side pressure frame 241 is fixedly connected to the outer ring wall of the movable rod 223. A baffle 244 located on the inner side of the side pressure frame 241 is fixedly connected to the top of the beam 21. The baffle 244 is slidably connected to the side pressure frame 241. The baffle 244 is located on the side of the movable rod 223 away from the support plate 31. A spring 245 is fixedly connected between the side of the baffle 244 away from the support plate 31 and the inner wall of the side pressure frame 241.

[0039] See also Figure 4 , Figure 5 and Figure 6 The side pressure assembly 24 also includes a limit block 242 fixedly connected to the top of the side pressure frame 241 and located on the side of the movable rod 223 close to the support plate 31. The top of the limit block 242 slides with the inclined surface of the bottom of the wedge block 243. The limit block 242 is fixedly connected with teeth on the side away from the corresponding movable rod 223. The lower pressure block 232 is provided with a tooth groove on the side close to the corresponding movable rod 223, and the teeth are engaged with the tooth groove.

[0040] See also Figure 4 , Figure 5 , Figure 6 and Figure 8 In the initial state, spring 1 233 is in a natural extension state. At this time, the lower pressing block 232 is in a maximum extension state at the bottom of the upper pressing block 231. When the movable rod 223 rotates and moves downward, it will synchronously drive the upper pressing block 231 to move downward, and then the upper pressing block 231 drives the lower pressing block 232 to move downward to elastically press the top of the blank, thereby playing a role in preliminary clamping and limiting the blank.

[0041] The movable rod 223 moves downward and drives the elastic pressing assembly 23 to elastically press the blank. Then, as the movable rod 223 drives the upper pressing block 231 to continue to move downward, the lower pressing block 232 will gradually shrink into the interior of the upper pressing block 231, and the spring 1 233 will be further compressed and contracted, and the wedge block 1 243 will be driven downward by the movable rod 223 to push the limit block 242, so that the limit block 242 and the side pressure frame 241 move in the direction close to the support plate 31. At this time, the spring 223 is pressed and shrunk. 45 will shrink under pressure, and the side pressure frame 241 will be used to clamp the blank in the center from the left and right sides, so as to improve the accuracy and firmness of the fixed position of the blank; when the side pressure frame 241 clamps the blank, the limit block 242 just contacts with the lower pressure block 232, and the protrusion on the limit block 242 will bite together with the groove on the lower pressure block 232, so as to realize the limit fixation of the lower pressure block 232, convert the elastic pressure into rigid pressure, and improve the firmness of the lower pressure block 232 to press the blank.

[0042] When the movable rod 223 pushes the upper pressing block 231 to move upward to release the clamping of the blank, the guide block 224 first moves upward along the lower vertical groove of the guide groove 222, so that the movable rod 223 moves vertically upward, and the movable rod 223 drives the wedge block 1 243 to move upward and separate from the limit block 242. At this time, the rebound force of the spring 245 is used to push the side pressure frame 241 to move away from the support plate 31; at the same time, the rebound force of the spring 1 233 is used to push the lower pressing block 232 to press the block upward When the spring 233 returns to its natural extension state, the lower pressing block 232 extends to the maximum extent. At this time, the upper pressing block 231 continues to drive the lower pressing block 232 to move upward, completely releasing the pressing of the blank. Then, the guide block 224 rotates upward along the spiral groove of the corresponding guide groove 222, so that the movable rod 223 rotates 180° under the guidance of the spiral groove, and the lower pressing block 232 is removed from the clamping station, which facilitates the unloading of the waste on the clamping station. The downward and upward movement of the movable rod 223 involves two guide grooves 222 respectively.

[0043] See also Figure 4 and Figure 5The side support assembly 25 includes a concave frame 251 fixedly connected to the bottom of the cross beam 21, the horizontal section of the concave frame 251 is located between the cross beam 21 and the connecting rod 225, the bottom end of the movable rod 223 passes through the horizontal section of the concave frame 251, and the top of the concave frame 251 is slidably installed with a plurality of trapezoidal brackets 252 corresponding to the movable rods 223 one by one, and the top of the trapezoidal brackets 252 is fixedly connected to a support block 253 located on the side of the cross beam 21 close to the support plate 31, the top of the support block 253 is flush with the top of the cross beam 21, and the top of the trapezoidal bracket 252 is fixedly connected to the corresponding side pressure frame 241.

[0044] See also Figure 4 and Figure 5 The two horizontal sections of the trapezoidal bracket 252 are both provided with through grooves 254, the cross beam 21 is slidably connected to the upper through groove 254, the movable rod 223 is movably connected to the lower through groove 254, the length of the upper through groove 254 is greater than the length of the lower through groove 254, and the outer ring wall of the movable rod 223 is fixedly connected to a wedge block 255 above the lower through groove 254, and the inclined surface of the lower end of the wedge block 255 cooperates with the inclined inner wall of the trapezoidal bracket 252 close to the support block 253.

[0045] See also Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 8 and Fig.10 When the wedge block 243 and the limit block 242 cooperate to push the side pressure frame 241 to move in the direction close to the support plate 31 to clamp the blank, the side pressure frame 241 can simultaneously drive the trapezoidal bracket 252 to move in the direction close to the support plate 31. At the same time, the movable rod 223 will drive the wedge block 255 to move downward, so that the inclined surface at the bottom of the wedge block 255 conflicts with the inner wall of the trapezoidal bracket 252. The wedge block 255 is used to push the trapezoidal bracket 252 to move in the direction close to the support plate 31, thereby reducing the burden of the side pressure frame 241 when driving the trapezoidal bracket 252 to move. Finally, the side pressure frame 241 is clamped from the left and right sides of the blank, and at this time the support block 253 is separated from the cross beam 21 (such as Figure 8 As shown), when the blank is subsequently circumscribed, the circumscribed cutting trajectory ( Fig.10 The dotted line in the middle indicates the circumferential cutting trajectory) is located between the support block 253 and the crossbeam 21; in summary, while the double ends of the blank are clamped, the left and right centering clamps are implemented, and the edge of the blank is supported by the support block 253, and the middle is supported by the support plate 31 to prevent the middle of the blank and the edge waste from shifting downward due to gravity before they are completely cut off during the circumferential cutting stage, causing bending and deformation at the connection, affecting the quality of the workpiece cutting.

[0046] When the wedge block 255 moves to the lower side slot 254 of the trapezoidal bracket 252, the wedge block 255 and the movable rod 223 just collide with the left and right inner walls of the lower side slot 254 respectively. At this time, a triangular support structure is formed between the movable rod 223 and the trapezoidal bracket 252 and the cross beam 21, thereby improving the support stability of the trapezoidal bracket 252 and the support block 253.

[0047] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The moving assembly 26 includes an electric push rod 261 disposed below the first connecting rod 225, the top of the telescopic section of the electric push rod 261 is fixedly connected to the second connecting rod 262, the first connecting rod 225 is slidably mounted on the top of the second connecting rod 262, and the bottoms of the left and right ends of the second connecting rod 262 are fixedly connected to elastic telescopic rods 263. It should be noted that when in use, the electric push rod 261 and the elastic telescopic rod 263 are both fixedly mounted on the workbench of the CNC cutting machine.

[0048] The electric push rod 261 drives the connecting rod 262 to move downward, and the connecting rod 262 then drives the two connecting rods 225 to move downward at the same time, so that the left and right clamping mechanisms 2 can be clamped and fixed at the same time, thereby improving the consistency of clamping and pressing on the left and right sides of the blank; the elastic telescopic rod 263 supports, guides and buffers the connecting rod 262, thereby improving the stability of the connecting rod 262 when it moves up and down.

[0049] See also Figure 1 and Figure 2 The follow-up adjustment component includes a slide 32 fixedly connected to the bottom of the front and rear ends of the support plate 31. The slide 32 is slidably installed on the guide rail 1. Two scissor-type telescopic frames 33 symmetrically distributed about the front and rear of the support plate 31 are commonly connected between the left and right cross beams 21. The middle part of the scissor-type telescopic frames 33 is rotatably connected to the corresponding slide 32.

[0050] When the distance between the left and right beams 21 needs to be adjusted, the moving beam 21 will drive the corresponding ends of the scissors-type telescopic frame 33 to move together, causing the scissors-type telescopic frame 33 to telescope and deform. Since the scissors-type telescopic frame 33 is symmetrically distributed about the slide 32 and the middle part of the scissors-type telescopic frame 33 is rotatably connected to the corresponding slide 32, during the telescopic and deformation of the scissors-type telescopic frame 33, the slide 32 will drive the support plate 31 to move with the movement of the beam 21, so that the support plate 31 is always in the middle position of the left and right beams 21, and there is no need to adjust the position of the support plate 31 separately, which makes it easier for the support plate 31 to support the middle position of the blank, thereby improving the stability of the blank during clamping and cutting.

[0051] See also Figure 1 , Figure 4 , Figure 8and Fig. 9 The limit mechanism 4 includes a slide groove 41 provided at the top of the cross beam 21, a slider 42 is installed inside the slide groove 41 for sliding back and forth, a limit plate 43 is fixedly connected to the top of the slider 42, and the slider 42 is locked to the cross beam 21 through a bolt knob. It should be noted that a scale line is also provided on the cross beam 21 to indicate the moving position of the limit plate 43.

[0052] After placing the blank on the crossbeam 21, push the blank backward until it contacts the limit plate 43, and use the limit plate 43 to limit the blank front and back to improve the accuracy of the front and back position when the blank is clamped. When fixing blanks of different specifications, you can loosen the bolt knob that locks the slider 42, and slide the limit plate 43 back and forth as needed to adjust the limit position.

[0053] See also Figure 1 and Figure 3 The lower side of the middle part of the support plate 31 is fixedly connected with a support telescopic rod, and the bottom end of the support telescopic rod is slidably connected to the connecting rod 262. The middle part of the support plate 31 is supported by the support telescopic rod to improve the support strength of the support plate 31.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixture for a CNC cutting machine, comprising a guide rail, characterized in that: The guide rail is provided with two clamping mechanisms which are relatively distributed on the left and right sides and a supporting mechanism located between the two clamping mechanisms; The clamping mechanism comprises a crossbeam arranged on the guide rail, on which are mounted a plurality of spinning assemblies equidistantly distributed front and rear, a plurality of side pressure assemblies corresponding to the spinning assemblies one by one, and a side support assembly; The spinning assembly includes a movable rod slidably mounted on the crossbeam, and an elastic clamping assembly is arranged on the top of the movable rod; the side pressure assembly includes a side pressure frame slidably mounted on the crossbeam and used for lateral clamping; the side support assembly includes a support block that moves synchronously with the side pressure frame and is used for edge support; After the movable rod moves downward to make the elastic clamping assembly perform elastic clamping, the movable rod continues to move downward to make the side clamping frame and the support block move synchronously, the side clamping frame performs left and right centering clamping, the support block moves to the edge support point, and the elastic clamping assembly's elastic clamping is converted into rigid clamping; The supporting mechanism includes a supporting plate located in the middle of the left and right beams and used for implementing the middle support; A limiting mechanism for blocking and limiting the rear side of the blank is also installed on the crossbeam.

2. A fixture for a CNC cutting machine according to claim 1, characterized in that: The spinning assembly also includes a through hole opened on the crossbeam and passing through up and down. The movable rod is movably installed inside the corresponding through hole. A guiding component for guiding the movable rod to rotate 180° and move downward is installed on the inner ring wall of the through hole. A connecting rod 1 is arranged below the crossbeam, and the bottom ends of several movable rods located on the same crossbeam are rotatably connected to the corresponding connecting rod 1.

3. A fixture for a CNC cutting machine according to claim 2, characterized in that: The guide component includes two guide grooves opened on the inner ring wall of the through hole and distributed circumferentially. A guide block corresponding to and matching the guide grooves is fixedly connected to the outer ring wall of the movable rod. The guide groove consists of two vertical grooves distributed up and down and parallel to each other left and right and a spiral groove connected between the two vertical grooves. The two spiral grooves corresponding to the same through hole have different rotation directions.

4. The fixture for a CNC cutting machine according to claim 1, characterized in that: The elastic clamping assembly includes an upper pressure block fixedly connected to the top of the movable rod, a lower pressure block located between the left and right movable rods is slidably installed at the bottom of the upper pressure block, a spring is fixedly connected between the top of the lower pressure block and the inner wall of the upper pressure block, and the lower pressure block is located above the crossbeam.

5. A fixture for a CNC cutting machine according to claim 4, characterized in that: The side pressure frame is sleeved on the outside of the corresponding movable rod, and a wedge block 1 located above the side pressure frame is fixedly connected to the outer ring wall of the movable rod, and a baffle plate located on the inner side of the side pressure frame is fixedly connected to the top of the cross beam, and the baffle plate is located on the side of the movable rod away from the support plate, and a spring 2 is fixedly connected between the side of the baffle plate away from the support plate and the inner wall of the side pressure frame.

6. A fixture for a CNC cutting machine according to claim 5, characterized in that: The side pressure assembly also includes a limit block fixedly connected to the top of the side pressure frame and located on the side of the movable rod close to the support plate. The top of the limit block slides with the inclined surface of the bottom of the wedge block. The limit block is fixedly connected with teeth on the side away from the corresponding movable rod. The lower pressure block is provided with a tooth groove on the side close to the corresponding movable rod, and the teeth are engaged with the tooth groove.

7. A fixture for a CNC cutting machine according to claim 2, characterized in that: The side support assembly also includes a concave frame fixedly connected to the bottom of the cross beam, the horizontal section of the concave frame is located between the cross beam and the connecting rod, the bottom end of the movable rod passes through the horizontal section of the concave frame, and the top of the concave frame is slidably installed with a plurality of trapezoidal brackets corresponding to the movable rods one by one. The support block is fixedly connected to the top of the trapezoidal bracket and is located between the left and right cross beams. The top of the support block is flush with the top of the cross beam, and the top of the trapezoidal bracket is fixedly connected to the corresponding side pressure frame.

8. The fixture for a CNC cutting machine according to claim 7, characterized in that: The two horizontal sections of the trapezoidal bracket are both provided with through grooves, the cross beam is slidably connected to the upper through groove, the movable rod is movably connected to the lower through groove, and the outer ring wall of the movable rod is fixedly connected to a wedge block 2 located above the lower through groove, and the inclined surface of the lower end of the wedge block 2 cooperates with the inclined inner wall of the trapezoidal bracket close to the support block.

9. The fixture for a CNC cutting machine according to claim 1, characterized in that: The support mechanism also includes a follow-up adjustment component for keeping the support plate centered, and the right crossbeam is movably arranged on the guide rail; The follow-up adjustment component includes a slide fixedly connected to the bottom of both ends of the support plate, and the slide is installed on the guide rail for left and right sliding. Two scissor-type telescopic frames symmetrically distributed about the front and back of the support plate are commonly connected between the left and right cross beams, and the middle part of the scissor-type telescopic frame is rotatably connected to the corresponding slide.

10. The fixture for a CNC cutting machine according to claim 1, characterized in that: The limiting mechanism comprises a slide groove provided at the top of the cross beam, a slider is installed inside the slide groove for forward and backward sliding, a limiting plate is fixedly connected to the top of the slider, and the slider is locked with the cross beam through a bolt knob.

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