Elastic decoupling laser cutting machine bed and cutting machine

Abstract

The present invention discloses an elastically decoupled laser cutting machine bed and cutting machine, belonging to the field of laser cutting technology. The bed comprises guide rails, a bed, and a tabletop. The guide rails are located on the bedtop. A support bar is provided on the tabletop. A blade rack is provided on the bedtop. A mounting slot is provided on the blade rack. The bottom of the support bar is located within the mounting slot, and a set gap exists between the bottom of the support bar and the bottom of the mounting slot. The bedtop and the tabletop are connected by a connector, and the connector can move along the height direction of the tabletop. An elastic member is provided between the connector and the tabletop. The support bar and the tabletop bear the weight, preventing the bedtop from deforming and ensuring the stability of the bedtop performance, thus solving the problem that the current bedtop cannot simultaneously meet high precision and high stability requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, and in particular to an elastically decoupled laser cutting machine bed and a cutting machine. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Currently, there are two types of laser cutting machines: integral welded bed and split bed.

[0004] The bed parts on both sides of the split bed are relatively independent structures. During on-site installation, the installation accuracy of the bed parts on both sides needs to be debugged. The installation and debugging time is long, and the debugging accuracy cannot be guaranteed, which makes the equipment operation stability poor.

[0005] The integral bed does not require on-site installation and debugging, but the transmission guide rails of the integral welded bed are directly fixed on the load-bearing platform. During the laser processing, the load-bearing platform deforms under the pressure of the steel plate to be processed, resulting in poor straightness of the transmission guide rails, which in turn affects the positioning accuracy and processing accuracy of the laser. Summary of the Invention

[0006] In order to solve the above problems, the present invention proposes an elastic decoupling laser cutting machine bed and a cutting machine, which bears weight through support bars and a table top to prevent the bed from deforming and ensure the stability of the bed performance.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] First, an elastically decoupled laser cutting machine bed is proposed, comprising a guide rail, a bed body and a table top; the guide rail is located on the bed body; a support bar is arranged on the table top; a knife bar frame is arranged on the bed body; a mounting groove is provided on the knife bar frame; the bottom of the support bar is located in the mounting groove, and a set gap is provided between the bottom of the support bar and the bottom of the mounting groove; the bed body and the table top are connected by a connecting piece, and the connecting piece can move along the height direction of the table top; an elastic piece is arranged between the connecting piece and the table top.

[0009] Furthermore, a guide groove is provided along the height direction of the table top, the connecting piece passes through the guide groove and is connected to the bed body, and the connecting piece can move along the guide groove.

[0010] Furthermore, a plurality of blade racks are provided on the bed, and the blade racks are arranged longitudinally along the bed;

[0011] A plurality of support bars are arranged on the table top, and the support bars are arranged transversely along the table top.

[0012] Furthermore, the blade rack is connected to the bed through a bracket;

[0013] Both ends of the support bar are respectively connected to the support frame, and the support frame is connected to the table top.

[0014] Furthermore, the support bar and the support frame are connected by using a mortise and tenon joint method.

[0015] Furthermore, the gap is set to be larger than the deformation amount that occurs when the support bar bears the maximum weight.

[0016] Furthermore, the bed is connected to the bed height adjustment assembly; the table is connected to the table height adjustment assembly; the bed height adjustment assembly and the table height adjustment assembly both include support legs and nuts; the support legs are threadedly connected to the bed or table, and the nuts are threadedly connected to the support legs.

[0017] Furthermore, the bed body has no contact with the table top in the vertical direction.

[0018] Furthermore, the bed includes a bed frame and bed legs; the blade frame is connected to the bed frame; the bed legs are connected to the bed frame; and the bed height adjustment assembly is connected to the bed legs.

[0019] The table top includes a table top frame and table top legs; the support bars are connected to the table top frame; the table top legs are connected to the table top frame; and the table top height adjustment assembly is connected to the table top legs.

[0020] The table top legs are connected to the bed body legs through connecting pieces, and the connecting pieces can move along the height direction of the table top legs.

[0021] In the second aspect, an elastic decoupling laser cutting machine is proposed, comprising the elastic decoupling laser cutting machine bed proposed in the first aspect.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention proposes an elastically decoupled laser cutting machine bed and cutting machine, wherein the bed has a guide rail arranged on the bed, a support bar arranged on the table top, and the support bar supports the plate to be cut, a blade frame is arranged on the bed, and a mounting groove is arranged on the blade frame, the bottom of the support bar is located in the mounting groove, and there is a set gap between the bottom of the support bar and the bottom of the mounting groove; when the plate is placed on the support bar, the weight of the plate is transferred to the table top through the support bar, but not to the bed, thereby not affecting the bed, not causing the bed to deform, and ensuring the installation accuracy of the blade frame and the guide rail; in addition, after the weight of the plate is transferred to the table top through the support bar, since an elastic member is arranged between the table top and the connecting member, and the table top can move up and down relative to the connecting member, dynamic alignment of the table top and the bed is achieved, ensuring the overall accuracy of the bed, thereby improving the processing accuracy and stability of the laser cutting machine.

[0024] Advantages of additional aspects of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0026] Figure 1 This is a schematic diagram of a bed frame disclosed in an embodiment;

[0027] Figure 2 A schematic diagram of a table frame disclosed in an embodiment;

[0028] Figure 3 A schematic diagram of the table structure disclosed in the embodiment;

[0029] Figure 4 A schematic diagram of a table adjustment assembly disclosed in an embodiment;

[0030] Figure 5 A partial schematic diagram of a table disclosed in an embodiment;

[0031] Figure 6 This is a schematic structural diagram of a disc spring assembly disclosed in an embodiment;

[0032] Figure 7 A schematic diagram of an elastic connection assembly disclosed in an embodiment;

[0033] Figure 8 It is an oblique view of the cross bracing structure disclosed in the embodiment;

[0034] Figure 9 A top view of the cross bracing structure disclosed in the embodiment;

[0035] Figure 10 This is a schematic diagram of the connection between the bed and the tabletop disclosed in the embodiment;

[0036] Figure 11 This is a schematic diagram of the pin shaft installation structure disclosed in the embodiment;

[0037] Figure 12 A side view of the pin shaft mounting structure disclosed in the embodiment;

[0038] Figure 13 A schematic diagram of the guide groove structure disclosed in the embodiment;

[0039] Figure 14 A schematic diagram of the support bar installation structure disclosed in the embodiment;

[0040] Figure 15 A schematic diagram of the support structure of the end portion of the support bar disclosed in the embodiment;

[0041] Figure 16 This is a schematic diagram of the force points of the support bar disclosed in the embodiment;

[0042] Figure 17 This is a schematic diagram of a support bar deformation simulation disclosed in the embodiment;

[0043] Figure 18 A schematic diagram of the positions of the support bar and the blade rack disclosed in the embodiment;

[0044] Figure 19 This is a schematic diagram of the support bar end connection structure disclosed in the embodiment;

[0045] Among them: 1. Table legs, 2. Side beams, 3. Table height adjustment assembly, 4. Support bars, 5. Elastic parts, 6. Connectors, 7. Notches, 8. Guide rails, 9. Racks, 10. Bed frames, 11. Support legs, 12. Nuts, 13. Pins, 14. Split pins, 15. Support frames, 16. Bolts, 17. Guide grooves, 18. Blade holders, 19. Brackets, 20. Pressure plates. DETAILED DESCRIPTION

[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0047] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention, and should not be understood as limiting the present invention.

[0050] In the present invention, terms such as "fixed connection," "connected," and "connection" should be interpreted broadly to mean a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediary. Relevant researchers or technicians in this field may determine the specific meanings of these terms in the present invention based on specific circumstances, and they should not be construed as limitations of the present invention.

[0051] Example 1

[0052] In this embodiment, an elastic decoupling laser cutting machine bed is disclosed, such as Figures 1-19 As shown, it includes a guide rail 8, a bed body and a table top; the guide rail 8 is located on the bed body; a support bar 4 is arranged on the table top; a knife bar frame 18 is arranged on the bed body; a mounting groove is opened on the knife bar frame 18; the bottom of the support bar 4 is located in the mounting groove, and there is a set gap between the bottom of the support bar 4 and the bottom of the mounting groove; the bed body and the table top are connected by a connecting member 6, and the connecting member 6 can move along the height direction of the table top; an elastic member 5 is arranged between the connecting member 6 and the table top.

[0053] like Figure 10 As shown, this embodiment discloses an elastically decoupled laser cutting machine bed, in which the bed is connected to the bed height adjustment assembly; the table is connected to the table height adjustment assembly 3; the bed height adjustment assembly and the table height adjustment assembly 3 both include support legs 11 and nuts 12; the support legs 11 are threadedly connected to the bed or the table, and the nuts 12 are threadedly connected to the support legs 11; the bed height adjustment assembly and the table height adjustment assembly 3 are installed on the ground to support the bed and the table and the structural parts thereon.

[0054] The bed height is adjusted by setting the bed height adjustment component, and the table height is adjusted by setting the table height adjustment component 3.

[0055] The embodiment discloses an elastic decoupling laser cutting machine bed. During installation, the bed and the table are adjusted to the desired height and leveled by adjusting the bed height adjustment assembly and the table height adjustment assembly 3. The table is connected to the bed through the connector 6 and the elastic member 5. When the bed and the table are installed in place, the elastic member 5 is in a compressed state. When the plate is placed on the support bar 4, the weight of the plate is transferred to the table through the support bar 4, but not to the bed, so that it will not affect the bed and will not deform the bed, thereby ensuring the installation accuracy of the blade frame 18 and the guide rail 8. In addition, after the weight of the plate is transferred to the table through the support bar 4, the slight deformation of the table can be fine-tuned by the elastic member 5 and the connector 6, thereby achieving dynamic alignment of the table and the bed, ensuring the overall accuracy of the bed, and improving the processing accuracy and stability of the laser cutting machine.

[0056] like Figure 13As shown, in order to ensure the stability of the table height adjustment, this embodiment provides a guide groove 17 along the table height direction, the connecting member 6 passes through the guide groove 17 and is connected to the bed body, and the connecting member 6 can move along the guide groove 17.

[0057] The guide groove 17 provides guidance and limitation for the movement of the table.

[0058] Preferably, the connecting member 6 is a M8x30 hexagon socket head screw, and the elastic member 5 is a disc spring; Figure 6 The disc spring group shown in the figure includes 7 disc springs. Figure 7 As shown, a disc spring group is provided on a connecting member 6, and the disc spring compression stroke is 0~2.45mm. The disc spring is sleeved on the outside of the connecting member 6. By adjusting the preload force of the disc spring, the table height adjustment component 3 and the bed height adjustment component, the height adjustment, leveling and dynamic alignment of the table and the bed can be achieved.

[0059] A plurality of blade racks 18 are provided on the bed, and the blade racks 18 are arranged longitudinally along the bed.

[0060] like Figure 18 As shown, a plurality of support bars 4 are arranged on the tabletop, extending transversely along the tabletop. Each blade holder 18 is provided with mounting slots corresponding to the number of support bars 4, with the width of the mounting slots being greater than the thickness of the support bars 4. The blade holders 18 limit the sides of the support bars 4, ensuring that the support bars 4 are vertical and controlling the spacing between the blade bars, thereby reducing the contact area with the high-energy laser beam, reducing burnout, and extending the service life. Furthermore, the blade holders 18 are not subjected to pressure from the support bars 4.

[0061] Each support bar 4 is across a plurality of blade racks 18; Figure 14-16 As shown, the bottom of each support bar 4 is located in the mounting slot of each blade holder 18, and there is a set gap L2 between the bottom of the support bar 4 and the bottom of each mounting slot. The set gap is greater than the deformation of the support bar 4 when it bears the maximum weight. The bottom of the mounting slot is provided with a process hole, through which the process hole facilitates the processing of the mounting slot.

[0062] By limiting the set gap L2, the support bar 4 bears the maximum weight and still does not contact the blade frame 18 after deformation, so the pressure borne by the support bar 4 still cannot be transmitted to the blade frame 18 and the bed.

[0063] The deformation amount of the support bar 4 when it bears the maximum weight is calculated by simulating the support bar 4 .

[0064] The specific simulation method is to determine the maximum pressure borne by each support bar 4 according to the maximum weight borne by the support bar 4;

[0065] The maximum pressure borne by the support bar 4 is applied to the support bar simulation model to obtain the maximum deformation of the support bar 4 through simulation.

[0066] The maximum weight that the support bars 4 can bear is determined by the mass of the board material to be carried and the number of support bars 4 provided in the table top.

[0067] Using finite element analysis software, a support bar simulation model is constructed, including: constructing a three-dimensional model of the support bar 4 based on the actual size of the support bar 4; and applying fixed constraints to both ends of the three-dimensional model of the support bar 4 to obtain the support bar simulation model.

[0068] For example, there are 176 support bars 4 on the table. The heaviest plate supported by the support bars 4 is 13.2 meters x 3.2 meters in size, 60 mm in thickness, made of stainless steel with a density of 7.93 g / cm 3 .

[0069] The weight of the heaviest plate is: 13.2x3.2x0.06x7.93=20.1 tons.

[0070] The maximum weight that each support bar 4 can bear is: 20.1 / 176=0.114 tons=114 kg.

[0071] The maximum pressure that each support bar 4 can bear is about 1140N. The maximum pressure is applied to the support bar simulation model and the force analysis is performed. The results are as follows: Figure 17 As shown, the maximum deformation of the support bar 4 is determined to be 6.36 mm.

[0072] Therefore, in this embodiment, the gap L2 is set to be greater than 6.36 mm.

[0073] like Figure 14 As shown, the blade rack 18 is connected to the bed through a bracket 19;

[0074] Both ends of the support bar 4 are connected to the support frame 15 respectively, and the support frame 15 is connected to the table top.

[0075] Preferably, the blade holder 18 is connected to the bracket 19 via bolts 16 .

[0076] The support bar 4 is connected to the table top through the support frame 15. When a steel plate is placed on the support bar 4, the pressure of the steel plate on the support bar 4 is transmitted to the table top through the support frame 15. When the table top is slightly deformed due to the force, the connection between the table top and the bed body is ensured by the connecting member 6. Under the preload of the elastic member 5, the table top is allowed to deform slightly, thus ensuring the accuracy and stability of the entire bed body.

[0077] This embodiment also stipulates that the support bar 4 and the support frame 15 are connected by mortise and tenon joints, which effectively alleviates the impact vibration of the support bar 4 and the table when the plate is placed on the support bar 4. Figure 19 As shown, snap-fit ​​grooves are respectively provided at both ends of the support bar 4; a mounting groove is provided on the support frame 15, and the snap-fit ​​groove of the support bar 4 is snap-fitted with the mounting groove on the support frame 15. Thereafter, at the upper edge of the mounting groove, the pressure plate 20 is connected to the support frame 15, and the support bar 4 is blocked by the pressure plate 20 to prevent the support bar 4 from falling out of the mounting groove.

[0078] Preferably, the pressing plate 20 is connected to the supporting frame 15 via bolts 16 .

[0079] The bed of this embodiment includes a bed frame 10 and bed legs; the blade frame 18 is connected to the bed frame 10; the bed legs are connected to the bed frame 10; and the bed height adjustment assembly is connected to the bed legs;

[0080] like Figure 3 、 Figure 4 As shown, the table includes a table frame and table legs 1; the support bar 4 is connected to the table frame; the table legs 1 are connected to the table frame; and the table height adjustment assembly 3 is connected to the table legs 1;

[0081] The table legs 1 are connected to the bed legs via connectors 6 , and the connectors 6 can move along the height direction of the table legs 1 .

[0082] like Figure 1 As shown, the bed frame 10 includes a bed frame and a cross brace, the guide rail 8 is fixed on the frame, the bed frame includes a left bed beam and a right bed beam that are relatively arranged, and the left bed beam and the right bed beam are connected by a cross brace; the bracket 19 is installed on the cross brace.

[0083] The bed height adjustment assembly is connected to the bottom of the bed frame. In addition to the guide rail 8, the upper surface of the bed frame is also equipped with a rack 9, which is connected to the external transmission member through the rack 9 and the guide rail 8.

[0084] like Figure 2 As shown, the table frame includes two side beams 2 symmetrically spaced apart, and a support bar 4 is connected between the two side beams 2. The support bar 4 is made of 5 mm thick steel plate and is used to support the steel plate to be cut.

[0085] like Figure 5 As shown, the bottoms of the two side beams 2 are connected to the table legs 1, as shown in FIG. Figure 8 、 Figure 9 As shown, notches 7 are provided at both ends of the cross brace, and the table legs 1 pass through the corresponding notches 7 and are connected to the table height adjustment assembly 3 .

[0086] A support frame 15 is fixed on each of the left beam 2 and the right beam 2 , and the support frame 15 can be connected to the blade by bolts 16 .

[0087] In order to realize the hoisting of the bed, a pin 13 is provided on the bed. Figure 11-13 As shown, two pin connecting plates are provided on the inner side of the bed frame, and the two ends of the pin 13 are connected to the two pin connecting plates. After the pin 13 is connected to the pin connecting plates, the pin 13 is fixed by a cotter pin 14 to prevent the pin 13 from coming out of the pin connecting plates.

[0088] To prevent the pressure on the support bars 4 from being transferred to the bed, this embodiment further limits the vertical contact between the bed and the tabletop, ensuring a distance L between the highest point of the bed and the lowest point of the tabletop. This allows for deformation of the tabletop, ensuring that even if the tabletop deforms, it will not contact the bed and transfer pressure to the bed. This ensures the accuracy of the bed, and further ensures the accuracy of the guide rails 8, rack 9, and blade holder 18 on the bed.

[0089] Preferably, the bed frame, cross braces, side beams 2 of the table top and each leg are all made of rectangular tubes.

[0090] This embodiment discloses an elastic decoupling laser cutting machine bed. When a plate is placed on the support bar 4, the weight of the plate is transferred to the table through the support bar 4, but not to the bed, so that it will not affect the bed and will not deform the bed, thereby ensuring the installation accuracy of the blade holder 18 and the guide rail 8. In addition, after the weight of the plate is transferred to the table through the support bar 4, since an elastic member 5 is provided between the table and the connecting member 6, and the table can move up and down relative to the connecting member 6, fine-tuning of the table deformation is achieved, thereby achieving dynamic alignment between the table and the bed, ensuring the overall accuracy of the bed, and thus improving the processing accuracy and stability of the laser cutting machine. The structure is simple, easy to install and maintain, and reduces the processing accuracy requirements and processing costs compared to the integral bed.

[0091] Example 2

[0092] In this embodiment, an elastic decoupling laser cutting machine is disclosed, including an elastic decoupling laser cutting machine bed disclosed in Example 1.

[0093] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. An elastic decoupling laser cutting machine bed, characterized in that: The invention comprises a guide rail (8), a bed body and a table top; the guide rail (8) is located on the bed body; a support bar (4) is arranged on the table top; a knife bar frame (18) is arranged on the bed body; a mounting groove is provided on the knife bar frame (18); the bottom of the support bar (4) is located in the mounting groove, and a set gap is provided between the bottom of the support bar (4) and the bottom of the mounting groove; the bed body and the table top are connected by a connecting member (6), and the connecting member (6) can move along the height direction of the table top; an elastic member (5) is provided between the connecting member (6) and the table top.

2. The elastic decoupling laser cutting machine bed according to claim 1, characterized in that: A guide groove (17) is provided along the height direction of the table top, the connecting member (6) passes through the guide groove (17) and is connected to the bed body, and the connecting member (6) is capable of moving along the guide groove 17.

3. The elastic decoupling laser cutting machine bed according to claim 1, characterized in that: A plurality of blade racks (18) are provided on the bed, and the blade racks (18) are arranged longitudinally along the bed; A plurality of support bars (4) are arranged on the table top, and the support bars (4) are arranged transversely along the table top.

4. The elastic decoupling laser cutting machine bed according to claim 1, characterized in that: The blade frame (18) is connected to the bed through a bracket (19); Both ends of the support bar (4) are respectively connected to the support frame (15), and the support frame (15) is connected to the table top.

5. The elastic decoupling laser cutting machine bed according to claim 1, characterized in that: The support bar (4) and the support frame (15) are connected by mortise and tenon joints.

6. The elastic decoupling laser cutting machine bed according to claim 1, characterized in that: The gap is set to be larger than the deformation that occurs when the support bar (4) bears the maximum weight.

7. The elastic decoupling laser cutting machine bed according to claim 1, characterized in that: The bed body is connected to the bed body height adjustment assembly; the table top is connected to the table top height adjustment assembly (3); the bed body height adjustment assembly and the table top height adjustment assembly (3) both include support legs (11) and nuts (12); the support legs (11) are threadedly connected to the bed body or the table top, and the nuts (12) are threadedly connected to the support legs (11).

8. The elastic decoupling laser cutting machine bed according to claim 1, characterized in that: The bed includes a bed frame (10) and bed legs; a blade frame (18) is connected to the bed frame (10); the bed legs are connected to the bed frame (10); and a bed height adjustment assembly is connected to the bed legs. The table top includes a table top frame and table top legs (1); the support bars (4) are connected to the table top frame; the table top legs (1) are connected to the table top frame; and the table top height adjustment components (3) are connected to the table top legs (1); The table top legs (1) are connected to the bed body legs via connecting pieces (6), and the connecting pieces (6) are capable of moving along the height direction of the table top legs (1).

9. The elastic decoupling laser cutting machine bed according to claim 1, characterized in that: The bed has no contact with the table top in the vertical direction.

10. An elastic decoupling laser cutting machine, characterized in that: It comprises an elastically decoupled laser cutting machine bed as described in any one of claims 1 to 9.

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