High-rigidity light-weight cross beam for laser cutting machine

Abstract

The high-rigidity light-weight cross beam for the laser cutting machine comprises a cross beam body which is composed of a top plate, a rear plate, a front plate and a lower bottom plate, the cross section of the cross beam body is in a trapezoid shape, cross beam installation bases are arranged at the bottoms of the two ends of the cross beam body respectively, and a plurality of supporting rib plates are fixedly arranged on the inner side of the cross beam body at intervals. A plurality of lightening holes are formed in the supporting rib plates. The high-rigidity light-weight cross beam for the laser cutting machine can effectively solve the problems that an existing steel plate welding cross beam is large in type selection of a driving motor, poor in dynamic response, high in material cost, not sensitive enough in response under the working condition of high-speed cutting and the like due to the fact that the weight is too large.

Description

Technical Field

[0001] This utility model belongs to the technical field of laser cutting equipment, specifically relating to a lightweight crossbeam for a high-rigidity laser cutting machine, suitable for gantry-type large-format laser cutting machinery. Background Technology

[0002] The crossbeam of a laser cutting machine plays a crucial role in fixing the laser beam's focal length during the cutting process, ensuring its stability and thus guaranteeing cutting quality and precision. As a support frame for the laser cutting head, the crossbeam bears the entire weight of the Z-axis module (laser head, laser head mounting bracket, drive motor, etc.), ensuring stability during the cutting process. Therefore, the crossbeam's structural layout, dimensions, and shape require high precision, and its design directly impacts cutting accuracy. An excellent crossbeam structure should guarantee the accuracy of the cutting head's position and focal length, thereby improving cutting precision. With technological advancements, laser cutting machines will continuously pursue higher cutting efficiency and precision, while also developing towards greater efficiency and lower energy consumption. The high rigidity, high stability, and high precision of the crossbeam are directly related to cutting quality and production efficiency.

[0003] Currently, the most common types of laser cutting machine crossbeams include: 1. Cast aluminum alloy crossbeams, made using a casting process. Due to limitations in fluidity requirements during casting, the material's mechanical properties may be poor, and weight reduction is difficult. 2. Welded aluminum plate crossbeams, made from welded aluminum plates, exhibit significant welding deformation and have a long manufacturing cycle. 3. One-piece die-cast aerospace aluminum crossbeams, which offer excellent overall rigidity and surface quality. Despite their performance advantages, they suffer from high cost and poor durability under certain extreme conditions. 4. Welded steel plate crossbeams, widely used in applications requiring high precision, high stability, and high load-bearing capacity due to their excellent seismic resistance, long-term stability, and high strength and rigidity.

[0004] Currently, most steel plate welded beams on the market have rectangular or I-shaped cross sections. Due to the large cross-sectional size and thick steel plates used, the beams are too heavy, which seriously affects their dynamic response performance and indirectly increases the burden on the motor. This leads to the need to select a larger drive motor to cope with the greater load, which not only increases the overall weight of the equipment and material costs, but also makes the laser cutting machine less responsive under high-speed cutting conditions, affecting the cutting accuracy. Utility Model Content

[0005] To address the shortcomings of the prior art, this application provides a lightweight crossbeam for a high-rigidity laser cutting machine, which effectively solves the problems of excessive weight in existing welded steel plate crossbeams, such as large drive motor selection, poor dynamic response, high material cost, and insufficient response under high-speed cutting conditions.

[0006] According to one aspect of this application, a lightweight crossbeam for a high-rigidity laser cutting machine is provided, comprising a crossbeam body with a trapezoidal cross-section formed by a top plate, a rear plate, a front plate and a bottom plate. Crossbeam mounting seats are respectively provided at the bottom of both ends of the crossbeam body. Multiple support ribs are fixedly arranged at intervals on the inner side of the crossbeam body, and a plurality of weight-reducing holes are provided on the support ribs.

[0007] Furthermore, the cross-section of the main body of the beam is an isosceles trapezoid.

[0008] Furthermore, the cross section of the main body of the crossbeam is an isosceles trapezoid in which the angle between the front plate and the rear plate and the normal of the bottom plate is 15°.

[0009] Furthermore, the connection positions between the top plate, rear plate, front plate, lower bottom plate, and supporting stiffener are fixed by welding; the crossbeam mounting base is fixed by welding to the lower bottom plate.

[0010] Furthermore, the top plate is provided with a first guide rail mounting strip and a rack mounting strip, and the front plate is provided with a second guide rail mounting strip.

[0011] Furthermore, the supporting stiffener plate is generally in the shape of a trapezoid that fits the inner side of the main body of the crossbeam. It has inclined sides at its four corners. The weight-reducing holes opened on it include a first weight-reducing hole in the shape of a quadrilateral and a second weight-reducing hole in the shape of a triangle. The adjacent straight sides of the first weight-reducing hole and the second weight-reducing hole are connected by an arc. The straight sides of the two weight-reducing holes on the outer side are parallel to the sides of the supporting stiffener plate that constitutes the trapezoidal shape and are spaced at the same distance. The straight sides of the two weight-reducing holes on the inner side are parallel to each other.

[0012] Furthermore, the lower base plate has multiple weight-reducing holes along its length.

[0013] Furthermore, multiple weight-reducing holes on the lower base plate are opened at the same interval on the side of the lower base plate near the front plate, including multiple third weight-reducing holes and multiple fourth weight-reducing holes that are staggered, and two third weight-reducing holes are provided between two adjacent fourth weight-reducing holes.

[0014] Furthermore, the bottom of the crossbeam mounting base is provided with multiple sliders and has a motor mounting hole, in which a drive motor assembly can be detachably installed.

[0015] Furthermore, the lower base plate and the crossbeam mounting base are respectively provided with a first wiring hole and a second wiring hole.

[0016] Compared with existing technologies, the lightweight crossbeam for a high-rigidity laser cutting machine provided in this application has the following advantages:

[0017] (1) The lightweight crossbeam for high-rigidity laser cutting machine provided in this application has a novel, simple and reasonable structural design, is easy to manufacture and use, and has the characteristics of light weight, sensitive response, good rigidity, high strength, strong load-bearing capacity, good seismic performance and long-term stability. It is especially suitable for occasions that require high precision, high stability and high load-bearing capacity.

[0018] (2) This application can be made by splicing and welding conventional plates. The manufacturing process is simple, the product cycle is short, and it is easy to install. It can also greatly reduce the manufacturing cost.

[0019] (3) By setting the cross-sectional shape of the main body of the beam to an isosceles trapezoid, this application has better resistance to deformation and damage. Under the same load conditions, the trapezoidal cross-section beam requires less material, effectively reducing the overall weight of the beam and facilitating dynamic response, especially dynamic response under high-speed cutting conditions.

[0020] (4) This application optimizes the topology of the supporting stiffeners and the weight reduction holes of the bottom plate in the main body of the beam. Under the premise that the beam structure meets certain strength and stiffness, the best material distribution is obtained, the redundant material area is removed, the weight of the beam is further reduced, the operating speed of the equipment is improved, and the purpose of high efficiency, low energy consumption and lightweight is achieved. Attached Figure Description

[0021] Figure 1 and Figure 2 These are structural schematic diagrams of this utility model from different perspectives;

[0022] Figure 3 This is a schematic diagram of the present invention with the front panel removed;

[0023] Figure 4 This is an exploded view of the present invention;

[0024] Figure 5 This is a schematic diagram of the supporting stiffener plate in this utility model;

[0025] Figure 6 This is a schematic diagram of the crossbeam mounting base in this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the lower base plate in this utility model;

[0027] In the diagram: 1. Top plate; 2. First guide rail mounting strip; 3. Rear plate; 4. Support rib; 41. First weight reduction hole; 42. Second weight reduction hole; 43. Bevel; 5. Front plate; 6. Second guide rail mounting strip; 7. Crossbeam mounting seat; 71. Slider; 72. Motor mounting hole; 73. Second wiring hole; 8. Bottom plate; 81. Third weight reduction hole; 82. Fourth weight reduction hole; 83. First wiring hole; 9. Drive motor assembly; 10. Rack mounting strip. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this disclosure pertains. The terms "upper," "lower," "left," "right," "front," "back," "inside," and "outside" used in the present patent application specification and claims are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Any aspects not detailed in the present utility model are well-known technologies to those skilled in the art.

[0029] Example 1:

[0030] like Figure 1-7 As shown, this application discloses a lightweight crossbeam for a high-rigidity laser cutting machine. It comprises a hollow, trapezoidal crossbeam body formed by a top plate 1, a rear plate 3, a front plate 5, and a bottom plate 8. Crossbeam mounting seats 7 are respectively provided at the bottom of both ends of the crossbeam body. Multiple supporting ribs 4 are fixedly arranged at intervals on the inner side of the crossbeam body, and several weight-reducing holes are formed on the supporting ribs 4. In this embodiment, the top plate 1, rear plate 3, front plate 5, bottom plate 8, and supporting ribs 4 are all made of steel plates, or other similar metal plates. They are welded together to form a trapezoidal crossbeam body. The crossbeam body preferably has an isosceles trapezoidal cross section, which is lighter under the same load compared to the rectangular or I-shaped crossbeams of traditional crossbeams. The crossbeam mounting seats 7 are also made of steel plates and are fixed to both ends of the bottom plate 8 of the crossbeam body by welding. The crossbeam mounting seats 7 support the crossbeam body, raising it to facilitate welding and installation of the entire crossbeam body on the cutting equipment. The top plate 1 is welded with a first guide rail mounting strip 2 and a rack mounting strip 10, which are used to install the guide rail and rack, respectively. The front plate 5 is welded with a second guide rail mounting strip 6, which is used to install the guide rail. Multiple sliders 71 are bolted to the bottom of the two crossbeam mounting seats 7 for guiding connection with the guide rail of the laser cutting machine base. The two crossbeam mounting seats 7 are also provided with motor mounting holes 72, and drive motor assemblies 9 for providing driving force are bolted into the motor mounting holes 72.

[0031] As a preferred embodiment, the cross section of the main body of the beam is an isosceles trapezoid in which the front plate 5 and the rear plate 3 form an angle of 15° with the normal of the bottom plate 8.

[0032] In a preferred embodiment, the supporting stiffener 4 is generally trapezoidal in shape to fit the inner side of the main body of the crossbeam. It has inclined sides 43 at its four corners to facilitate welding of the four straight sides of the supporting stiffener 4 to the four surfaces of the inner side of the main body of the crossbeam, while also reducing the weight of the supporting stiffener 4. The weight-reducing holes on the supporting stiffener 4 include a first weight-reducing hole 41, which is generally quadrilateral, and a second weight-reducing hole 42, which is generally triangular. The adjacent straight sides of the first weight-reducing hole 41 and the second weight-reducing hole 42 are rounded. The outer straight sides of the two weight-reducing holes are parallel to the sides of the trapezoidal supporting stiffener 4 and are spaced at the same distance. The inner straight sides of the two weight-reducing holes are parallel. The angles of the trapezoid formed by extending the outer straight sides of the first weight-reducing hole 41 and the second weight-reducing hole 42 are the same as the angles of the overall trapezoidal shape of the supporting stiffener 4. Through topology optimization of the aforementioned inclined sides 43, the first weight reduction hole 41, and the second weight reduction hole 42, an excellent material distribution can be obtained, and redundant materials can be effectively removed, thereby reducing the weight of the main beam.

[0033] In a preferred embodiment, the lower base plate 8 is provided with a plurality of weight-reducing holes along its length. The weight-reducing holes are located on the side of the lower base plate 8 near the front plate 5. These weight-reducing holes include a plurality of third weight-reducing holes 81 and a plurality of fourth weight-reducing holes 82 that are staggered. Adjacent weight-reducing holes are provided at the same interval. Two third weight-reducing holes 81 can be further provided between two adjacent fourth weight-reducing holes 82. By providing these weight-reducing holes, the weight of the main body of the crossbeam is further reduced.

[0034] In this embodiment, the bottom plate 8 and the crossbeam mounting base 7 may also be respectively provided with a first wiring hole 83 and a second wiring hole 73, which facilitates wiring during equipment installation and further reduces the weight of the entire crossbeam.

Claims

1. A lightweight crossbeam for a high-rigidity laser cutting machine, characterized in that, It includes a crossbeam body with a trapezoidal cross section, consisting of a top plate (1), a rear plate (3), a front plate (5) and a bottom plate (8). The bottom of both ends of the crossbeam body is provided with a crossbeam mounting seat (7). Multiple support ribs (4) are fixedly arranged at intervals on the inner side of the crossbeam body. Several weight-reducing holes are opened on the support ribs (4).

2. The lightweight crossbeam for a high-rigidity laser cutting machine according to claim 1, characterized in that, The cross-section of the main body of the beam is an isosceles trapezoid.

3. The lightweight crossbeam for a high-rigidity laser cutting machine according to claim 2, characterized in that, The cross section of the main body of the crossbeam is an isosceles trapezoid in which the angle between the front plate (5) and the rear plate (3) and the normal of the bottom plate (8) is 15°.

4. The lightweight crossbeam for a high-rigidity laser cutting machine according to claim 1, characterized in that, The connection between the top plate (1), rear plate (3), front plate (5), bottom plate (8) and supporting stiffener (4) is fixed by welding; the crossbeam mounting base (7) is fixed by welding to the bottom plate (8).

5. A lightweight crossbeam for a high-rigidity laser cutting machine according to claim 1, characterized in that, The top plate (1) is provided with a first guide rail mounting strip (2) and a rack mounting strip (10), and the front plate (5) is provided with a second guide rail mounting strip (6).

6. A lightweight crossbeam for a high-rigidity laser cutting machine according to any one of claims 1-5, characterized in that, The supporting stiffener plate (4) is generally in the shape of a trapezoid that is adapted to the inner side of the main body of the crossbeam. It has a sloping side (43) at each of its four corners. The weight-reducing holes on it include a first weight-reducing hole (41) which is generally in the shape of a quadrilateral and a second weight-reducing hole (42) which is generally in the shape of a triangle. The adjacent straight sides of the first weight-reducing hole (41) and the second weight-reducing hole (42) are connected by a rounded transition. The straight sides of the two weight-reducing holes on the outer side are parallel to the sides of the supporting stiffener plate (4) that constitute the trapezoidal shape and are spaced at the same distance. The straight sides of the two weight-reducing holes on the inner side are parallel to each other.

7. A lightweight crossbeam for a high-rigidity laser cutting machine according to claim 1, characterized in that, The bottom plate (8) has multiple weight-reducing holes along its length.

8. A lightweight crossbeam for a high-rigidity laser cutting machine according to claim 7, characterized in that, Multiple weight-reducing holes on the lower base plate (8) are opened at the same interval on the side of the lower base plate (8) near the front plate (5), including multiple third weight-reducing holes (81) and multiple fourth weight-reducing holes (82) arranged in a staggered manner, and two third weight-reducing holes (81) are arranged between two adjacent fourth weight-reducing holes (82).

9. A lightweight crossbeam for a high-rigidity laser cutting machine according to claim 8, characterized in that, The bottom plate (8) and the crossbeam mounting base (7) are respectively provided with a first wiring hole (83) and a second wiring hole (73).

10. A lightweight crossbeam for a high-rigidity laser cutting machine according to claim 1, characterized in that, The bottom of the crossbeam mounting base (7) is provided with multiple sliders (71) and a motor mounting hole (72) is provided. A drive motor assembly (9) can be detachably installed in the motor mounting hole (72).

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