A front pneumatic double chuck for laser cutting machine

Abstract

The present invention discloses a front pneumatic double chuck for a laser cutting machine. A clamping opening is provided in the middle of the chuck, a roller is provided on one side of the chuck, and a spacing adjustment mechanism is connected to the roller. The front pneumatic double chuck for a laser cutting machine of the present invention has high clamping stability, can meet the clamping requirements of workpieces with multiple cross-section sizes, and is suitable for assembly line operation.

Description

Technical Field

[0001] The invention belongs to the technical field of machine tool equipment, and in particular to a front pneumatic double chuck for a laser cutting machine. Background Art

[0002] A chuck is a mechanical device commonly used in production technology for clamping workpieces. Existing laser cutting technology requires clamping of workpieces or pipes. Current chucks are generally simple clamping structures with poor clamping effects and low stability, resulting in high product processing losses. In addition, current chucks have poor applicability, and the clamping opening is not adjustable. They can only adapt to the clamping of workpieces with regular structures, but cannot meet the clamping requirements of flat tubes, flat tubes, and a few profiles or pipes with special cross-sections. Since the clamping jaws are usually fixed to the machine tool structure, their working efficiency is low and they cannot be applied to assembly line operations.

[0003] The utility model patent with publication number CN206898417U disclosed on January 19, 2018, a chuck mechanism for CNC machine tools, including a chuck and a switch, a block is provided on the chuck, a hydraulic pipeline is connected to the bottom of the block, the block is connected to the hydraulic pump through the hydraulic pipeline, a slide groove is opened on the upper surface of the chuck, a sliding mechanism is connected to the bottom of the block, the block is connected to the slide groove through the sliding mechanism, the hydraulic pump is connected to the switch through an electric wire, a control mechanism is provided inside the switch, a pressure sensor is provided on the top of the control mechanism, and a controller is provided inside the control mechanism. The chuck mechanism for CNC machine tools cannot solve the technical problems recorded above. Summary of the invention

[0004] The purpose of the present invention is to provide a front pneumatic double chuck for a laser cutting machine with high clamping stability, capable of clamping workpieces of multiple cross-sections, and suitable for assembly line operation, in view of the deficiencies in the prior art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The laser cutting machine uses a front pneumatic double chuck, a chuck opening is provided in the middle of the chuck, a roller is provided on one side of the chuck, and a spacing adjustment mechanism is connected to the roller.

[0007] The spacing adjustment mechanism includes a rotating cylinder, which is arranged at the end of the chuck and is relatively arranged on both sides of the bayonet. The output end of the rotating cylinder is connected to a flange, and the two ends of the bottom of the flange are hinged with a first connecting rod, and the end of the first connecting rod is hinged with a second connecting rod. A roller seat is provided in the middle of the second connecting rod, and the roller is rotatably connected to the roller seat.

[0008] The rotating cylinders are arranged at equal intervals along the circumference of the chuck, four roller seats are provided, adjacent roller seats are arranged vertically, and the rollers are arranged in pairs on the roller seats.

[0009] A slider is provided at the bottom of the second connecting rod, a guide rail is provided on the chuck, the slider cooperates with the guide rail, the guide rails are arranged in pairs, and the guide rails are arranged vertically to the second connecting rod.

[0010] The chuck includes a step, and the adjacent rotating cylinders are respectively arranged on the end surface of the chuck and the bottom of the step, and the rotating cylinders arranged opposite to each other are in the same plane.

[0011] An auxiliary connecting rod is hingedly connected to the top of the flange, and two ends of the auxiliary connecting rod are respectively hingedly connected to the flanges on both sides of the bayonet, and both ends of the auxiliary connecting rod are arc-shaped structures.

[0012] A slewing bearing is fixedly connected to one side of the chuck.

[0013] The flange is a symmetrical structure, and connecting holes are provided at both ends of the flange.

[0014] The rotary cylinder and the flange are respectively located on two sides of the chuck.

[0015] The roller seat, the second connecting rod and the guide rail are all provided with mounting holes.

[0016] The technical effects of the present invention are as follows: by adopting the front pneumatic double chuck for the laser cutting machine of the present invention, the spacing adjustment of the four rollers is realized through the driving of two pairs of rotating cylinders, the four surfaces of the workpiece can be clamped, the clamping stability is high, and the spacing between the two pairs of rollers can be adjusted separately, so as to meet the clamping requirements of profiles or pipes of various types of cross-sections, and the application range is wide; the roller adopts a rotatable structure, which can be matched with the conveying mechanism, and compared with the traditional clamping claw structure, it saves multiple clamping operations, has high work efficiency, and can be suitable for assembly line operation; the overall structural design is reasonable, the space occupied is small, the components can be flexibly disassembled, easy to maintain, and the use cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] This specification includes the following drawings, which show the following contents:

[0018] Figure 1 It is a structural schematic diagram of a front pneumatic double chuck for a laser cutting machine of the present invention;

[0019] Figure 2 It is a schematic diagram of the installation of the spacing adjustment mechanism of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the spacing adjustment mechanism of the present invention;

[0021] Figure 4 It is a schematic diagram of the installation of the rotary cylinder of the present invention;

[0022] Figure 5 It is a schematic diagram of the installation of the slewing bearing of the present invention;

[0023] Figure 6 It is a schematic diagram of the installation of the drum of the present invention;

[0024] Figure 7 It is a structural schematic diagram of the flange of the present invention.

[0025] The markings in the figure are: 1. chuck; 2. bayonet; 3. slewing bearing; 4. roller; 5. rotary cylinder; 6. flange; 7. first connecting rod; 8. second connecting rod; 9. roller seat; 10. slider; 11. guide rail; 12. auxiliary connecting rod; 13. connecting hole; 14. mounting hole; 15. step. DETAILED DESCRIPTION

[0026] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0027] like Figures 1 to 7 As shown, the laser cutting machine uses a front pneumatic double chuck, a bayonet 2 is provided in the middle of the chuck 1, a roller 4 is provided on one side of the chuck 1, and a spacing adjustment mechanism is connected to the roller 4. The bayonet 2 is the protrusion of the workpiece from the chuck 1, and a laser cutting device is provided on one side. The roller 4 is used to clamp the workpiece, and the spacing of the rollers 4 is adjustable, so it can meet the stable clamping requirements of workpieces with various cross sections.

[0028] like Figures 1 to 3 As shown, the spacing adjustment mechanism includes a rotating cylinder 5, which is arranged at the end of the chuck 1, and the rotating cylinder 5 is relatively arranged on both sides of the bayonet 2. The output end of the rotating cylinder 5 is connected to a flange 6, and the first connecting rods 7 are hinged at both ends of the bottom of the flange 6. The second connecting rod 8 is hinged at the end of the first connecting rod. A roller seat 9 is provided in the middle of the second connecting rod 8, and the roller 4 is rotatably connected to the roller seat 9. A pair of rotating cylinders 5 are simultaneously started to drive the flange 6 to rotate, and the flange 6 drives the two first connecting rods 7 to rotate. The rotation of the two first connecting rods 7 expands or shrinks the spacing between the two second connecting rods 8, so that the spacing between the roller seats 9 on the second connecting rod 8 changes accordingly, which can adapt to the cross-sectional length or width of the workpiece. The other pair of rotating cylinders 5 operate in the same way as above to adapt to the cross-sectional width or length of the workpiece. The two pairs of rotating cylinders 5 adjust the spacing of the rollers 4 respectively to achieve clamping of workpieces with different cross-sectional sizes. Among them, the roller 4 is rotatably connected to the roller seat 9, and the roller 4 can rotate to guide the workpiece. After the front section of the workpiece is cut, the roller 4 does not need to release the clamping, and the rear section of the workpiece can continue to be transported along the track and the roller 4 and cut in sequence. Therefore, a single workpiece only needs to be clamped once to ensure the overall clamping positioning, thereby greatly improving production efficiency.

[0029] like Figure 1 As shown, the rotary cylinders 5 are arranged at equal intervals along the circumference of the chuck 1, four roller seats 9 are provided, and the adjacent roller seats 9 are arranged vertically, and the rollers 4 are arranged in pairs on the roller seats 9. The four rotary cylinders 5 are distributed in a cross shape on the chuck 1, and the two pairs of rotary cylinders 5 respectively control the spacing between the two pairs of roller seats 9, so that the four rollers 4 form an area with adjustable size, which can meet the clamping of workpieces with various cross-sectional sizes; the rollers 4 arranged in pairs increase the contact area between them and the workpiece, which is conducive to preventing the workpiece from being deformed due to excessive clamping force.

[0030] like Figure 3 As shown, a slider 10 is provided at the bottom of the second connecting rod 8, and a guide rail 11 is provided on the chuck 1. The slider 10 cooperates with the guide rail 11, and the guide rails 11 are arranged in pairs, and the guide rails 11 are arranged perpendicular to the second connecting rod 8. In order to ensure the accuracy of the moving direction of the second connecting rod 8 driven by the rotary cylinder 5, a guide rail 11 perpendicular to the second connecting rod 8 is provided on the chuck 1, and a slider 10 cooperating with the guide rail 11 is provided at the bottom of the second connecting rod 8, so that the movement of the second connecting rod 8 is limited to a linear direction, so that the roller 4 is always symmetrical about the axis of the bayonet 2 before and after the spacing adjustment, and the two opposite surfaces of the workpiece are subjected to a consistent clamping effect, and the clamping stability is reliable. Among them, each guide rail 11 is equipped with two sliders 10 to correspond to the two second connecting rods 8 respectively, thereby reducing the number of guide rails 11; two sliders 10 are provided on each second connecting rod 8 to correspond to the two guide rails 11, further ensuring the accuracy of the moving direction of the roller 4,

[0031] like Figure 4 As shown, the chuck 1 includes a step 15, and the adjacent rotary cylinders 5 are respectively arranged on the end surface of the chuck 1 and the step 15, and the relatively arranged rotary cylinders 5 are in the same plane. By arranging the step 15 structure on the chuck 1, the installation height of a pair of rotary cylinders 5 is higher than that of another pair of rotary cylinders 5, so that the connecting rod structure connected by the two pairs of rotary cylinders 5 achieves the effect of staggered distribution, and there will be no motion interference in space. The positions of the four roller seats 9 are also closer, and the stability of clamping the workpiece is higher, the volume of the chuck 1 is reduced, and the structure is more compact; the relatively arranged rotary cylinders 5 adopt a coplanar design, so that the two are driven synchronously, and the stability of the movement of the roller 4 is further guaranteed.

[0032] like Figures 1 to 3As shown, the top of the flange 6 is connected and hinged with an auxiliary connecting rod 12, and the two ends of the auxiliary connecting rod 12 are respectively hinged to the flanges 6 on both sides of the bayonet 2, and both ends of the auxiliary connecting rod 12 are arc-shaped structures. The two ends of the auxiliary connecting rod 12 are respectively connected to the two flanges 6, so that the drive of the two relatively arranged rotating cylinders 5 has a linkage effect, the movement synchronization of the second connecting rod 8 is reliable, and the movement synchronization of the relative roller seat 9 is consistent, ensuring the reliability of the device. The two ends of the auxiliary connecting rod 12 are designed to be arc-shaped, which has a yielding effect so that it will not block the passage of the workpiece.

[0033] like Figure 5 As shown, a slewing bearing 3 is fixedly connected to one side of the chuck 1. The slewing bearing 3 fixed on the chuck 1 is meshed with an external linkage gear through its external teeth, so that the chuck 1 is rotated as a whole by a certain angle to prevent the chuck 1 from being unstable, thereby ensuring that the roller 4 fits the cross-sectional shape of the workpiece and provides a reliable clamping effect.

[0034] like Figure 7 As shown, the flange 6 is a symmetrical structure, and connecting holes 13 are provided at both ends of the flange 6. The single body structure of the flange 6 is a T-shaped structure, and the flange 6 is stacked to meet the installation of multiple parts. The connecting holes 13 are provided at both ends of the flange 6, and the first connecting rod 7 and the auxiliary connecting rod 12 can be installed at the same time using one pin shaft, so as to achieve the function of synchronously driving a pair of the first connecting rod 7 and the auxiliary connecting rod 12, which greatly reduces the number of connecting parts, reduces the complexity of the structure, and thus reduces the use cost of the chuck 1.

[0035] like Figure 1 As shown, the rotary cylinder 5 and the flange 6 are respectively located on both sides of the chuck 1. Since the rotary cylinder 5 body is a fixed part, it is installed on the opposite side of the flange 6, so that the fixed part and the moving part on the chuck 1 are isolated from each other, which is conducive to reducing the overall volume of the chuck 1 in space, and is also convenient for positioning and installing parts on the chuck 1, reducing the installation cost, and is also convenient for maintenance and replacement of parts on the side of the chuck 1 where the moving part is installed when they are damaged.

[0036] like Figure 3 As shown, the roller seat 9, the second connecting rod 8 and the guide rail 11 are all provided with mounting holes 14. The above structure is provided with multiple mounting holes 14, which is convenient for the installation and disassembly of each component. For example, if the slider 10, the guide rail 11 and other components are worn, they can be replaced accordingly without affecting the functions of other components. In addition, the specifications of the same type of components of the chuck 1 are unified, and they can be mass-produced, further reducing costs.

[0037] The working process of the front pneumatic double chuck for the laser cutting machine is as follows: the workpiece is transported to the chuck 1 through the track, one end of the workpiece extends from the clamping mouth 2, the track stops, the rotary cylinder 5 is started to rotate the flange 6, and under the hinged linkage action of the flange 6 and the first connecting rod 7, the second connecting rod 8 moves unidirectionally and linearly along the guide rail 11, and the spacing between the two groups of second connecting rods 8 can be expanded or reduced, that is, the relative spacing of the rollers 4 can be adjusted. According to the cross-sectional shape of the incoming workpiece, four rotating cylinders 5 are started synchronously, one pair of rotating cylinders 5 adjusts the spacing between the rollers 4 connected thereto to correspond to the cross-sectional length of the workpiece, and the other pair of rotating cylinders 5 adjusts the spacing between the rollers 4 connected thereto to correspond to the cross-sectional width of the workpiece, so that the incoming workpiece can be clamped on four sides, and the stability of the workpiece is guaranteed. If the workpiece is a square tube, flat tube or flat tube and other types of structures, the clamping stability of the four sides is better, and the laser cutting process can be carried out after the workpiece is stably clamped; since the roller 4 is rotatable, after the front section of the workpiece is cut, the track is started to move the rear section of the workpiece along the roller 4 to the required fixed length, and the laser cutting process can be carried out again, and the remaining parts of the workpiece are carried out in sequence according to the above steps until the cutting is complete.

[0038] The laser cutting machine uses a front pneumatic double chuck, which can adjust the spacing of the four rollers 4 by driving two pairs of rotating cylinders 5, so as to clamp the four sides of the workpiece with high clamping stability. The spacing between the two pairs of rollers 4 can be adjusted separately, so as to meet the clamping needs of profiles or pipes with various types of cross-sections and has a wide range of applications. The roller 4 adopts a rotatable structure and can be matched with the conveying mechanism. Compared with the traditional clamping claw structure, it saves multiple clamping operations, has high work efficiency, and can be suitable for assembly line operation. The overall structural design is reasonable, occupies a small space, and each component can be flexibly disassembled for easy maintenance and low cost.

[0039] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A front pneumatic double chuck for a laser cutting machine, characterized in that: A clamping opening (2) is provided in the middle of the chuck (1), a roller (4) is provided on one side of the chuck (1), and the roller (4) is connected to a spacing adjustment mechanism.

2. The front pneumatic double chuck for laser cutting machine according to claim 1, characterized in that: The spacing adjustment mechanism comprises a rotating cylinder (5), the rotating cylinder (5) being arranged at the end of the chuck (1), the rotating cylinder (5) being arranged relatively on both sides of the bayonet (2), the output end of the rotating cylinder (5) being connected to a flange (6), the two ends of the bottom of the flange (6) being hinged with a first connecting rod (7), the end of the first connecting rod being hinged with a second connecting rod (8), a roller seat (9) being arranged in the middle of the second connecting rod (8), and the roller (4) being rotatably connected to the roller seat (9).

3. The front pneumatic double chuck for laser cutting machine according to claim 2, characterized in that: The rotary cylinders (5) are arranged at equal intervals along the circumference of the chuck (1), four roller seats (9) are provided, adjacent roller seats (9) are arranged vertically, and the rollers (4) are arranged in pairs on the roller seats (9).

4. The front pneumatic double chuck for laser cutting machine according to claim 3, characterized in that: A slider (10) is provided at the bottom of the second connecting rod (8), a guide rail (11) is provided on the chuck (1), the slider (10) cooperates with the guide rail (11), the guide rails (11) are arranged in pairs, and the guide rails (11) and the second connecting rod (8) are arranged vertically.

5. The front pneumatic double chuck for laser cutting machine according to claim 4, characterized in that: The chuck (1) comprises a step (15), and the adjacent rotary cylinders (5) are respectively arranged on the end surface of the chuck (1) and the step (15), and the rotary cylinders (5) arranged opposite to each other are located in the same plane.

6. The front pneumatic double chuck for a laser cutting machine according to any one of claims 2 to 5, characterized in that: The top of the flange (6) is hingedly connected with an auxiliary connecting rod (12), and the two ends of the auxiliary connecting rod (12) are respectively hingedly connected to the flanges (6) on both sides of the bayonet (2), and both ends of the auxiliary connecting rod (12) are arc-shaped structures.

7. The front pneumatic double chuck for laser cutting machine according to claim 6, characterized in that: A slewing bearing (3) is fixedly connected to one side of the chuck (1).

8. The front pneumatic double chuck for laser cutting machine according to claim 2, characterized in that: The flange (6) is a symmetrical structure, and connecting holes (13) are provided at both ends of the flange (6).

9. The front pneumatic double chuck for laser cutting machine according to claim 6, characterized in that: The rotating cylinder (5) and the flange (6) are respectively located on both sides of the chuck (1).

10. The front pneumatic double chuck for laser cutting machine according to claim 5, characterized in that: The roller seat (9), the second connecting rod (8) and the guide rail (11) are all provided with mounting holes (14).

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