Beam of laser cutting machine

Abstract

The laser cutting machine beam comprises a body and a base, the body comprises an outer wall, a circular ring is arranged in the center of the outer wall, the circular ring is hollow and extends to the two ends communicated with the outer wall in the axial direction of the body, the beam is provided with a guide rail and a rack, and the outer wall is provided with a guide rail groove matched with the guide rail and a rack groove matched with the rack; reinforcing ribs are arranged between the circular ring and the outer wall, and projections of the reinforcing ribs in the radial direction of the circular ring fall into the guide rail groove and / or the rack groove. Through the internally hollow circular ring, on one hand, the overall weight of the cross beam is reduced, on the other hand, the circular ring in the center of the main body can enhance the internal structural strength of the main body, through arrangement of the reinforcing ribs, the overall structural strength of the cross beam is improved, and the projections of the reinforcing ribs in the radial direction of the circular ring fall into the guide rail groove and / or the rack groove to share stress from the rack and the guide rail; the supporting stability of the cross beam in the moving process of the laser head is enhanced, and the good cutting precision of the laser cutting machine during high-speed operation is met.

Description

Technical Field

[0001] The present application belongs to the field of laser cutting technology, and specifically relates to a laser cutting machine beam. Background Art

[0002] Laser cutting involves focusing laser light emitted from a laser generator into a high-power, high-density beam through an optical system. The laser beam strikes the workpiece surface, causing it to reach its melting or boiling point. Simultaneously, high-pressure gas coaxial with the beam blows away the molten or vaporized metal. As the beam and workpiece move relative to each other, a slit is formed in the material, achieving the desired cutting effect.

[0003] Laser cutting replaces traditional mechanical knives with invisible beams. It has the characteristics of high precision, fast cutting, no restrictions on cutting patterns, automatic typesetting to save materials, smooth incisions, and low processing costs. It will gradually improve or replace traditional metal cutting process equipment. The mechanical part of the laser cutter head has no contact with the workpiece and will not scratch the work surface during operation. The laser cutting speed is fast, the incision is smooth and flat, and generally no subsequent processing is required. The cutting heat-affected zone is small, the plate deformation is small, and the cutting seam is narrow. The incision has no mechanical stress and no shear burrs. The processing accuracy is high, the repeatability is good, and it does not damage the material surface. CNC programming can process any plane pattern and can cut large-format whole plates without the need for molds, which is economical and time-saving. Therefore, laser cutting machines are becoming more and more mature as a new type of tool used in various industries.

[0004] As a crucial component of a laser cutting machine, the crossbeam must be placed above the machine bed and carry the laser head, enabling lateral movement at the required speed. Existing steel crossbeams are heavy, have high inertia, and require extensive welding, which takes a long time to release weld stress. To reduce weight, cast or stretched aluminum crossbeams are required. Furthermore, for transverse laser cutting machines with large crossbeam spans, an aluminum crossbeam with stable precision and excellent dynamic performance is even more desirable. Utility Model Content

[0005] The present application provides a laser cutting machine beam to solve the problem that the laser cutting machine beam has low structural strength and is prone to bending during high-speed processing, resulting in low processing accuracy.

[0006] The technical solutions adopted in this application are:

[0007] A laser cutting machine beam comprises a main body and a base, wherein the main body is fixedly connected to the base, the base is fixed to the machine tool of the laser cutting machine, and the laser head of the laser cutting machine moves along the beam, the main body comprises an outer wall, a circular ring is provided at the center of the outer wall, the interior of the circular ring is hollow and extends axially along the main body to connect the two ends of the outer wall, the beam is provided with a guide rail and a rack, the outer wall is provided with a guide rail groove cooperating with the guide rail and a rack groove cooperating with the rack, a reinforcing rib is provided between the circular ring and the outer wall, and the projection of the reinforcing rib in the radial direction of the circular ring falls into the guide rail groove and / or the rack groove.

[0008] In a preferred embodiment, the reinforcing ribs include at least a first reinforcing rib and a second reinforcing rib, wherein the projection of the first reinforcing rib in the radial direction of the ring falls into the guide rail groove, and the projection of the second reinforcing rib in the radial direction of the ring falls into the rack groove.

[0009] In a preferred embodiment, the plurality of reinforcing ribs are relatively distributed above and below the central cross section of the circular ring, and transverse reinforcing ribs and oblique reinforcing ribs are provided above and below the central cross section of the circular ring.

[0010] In a preferred embodiment, the transverse reinforcing ribs are symmetrically arranged about the central cross section of the circular ring, and the number of the oblique reinforcing ribs located below the central cross section of the circular ring is not less than the number of the oblique reinforcing ribs located above the central cross section of the circular ring.

[0011] In a preferred embodiment, the inner side of the outer wall is provided with inwardly extending ribs.

[0012] In a preferred embodiment, one of the projection of the reinforcing rib in the radial direction of the ring and the projection of the convex rib in the lateral direction falls on the guide rail groove, and the other falls on the rack groove.

[0013] In a preferred embodiment, the bottom of the outer wall is provided with an inwardly recessed groove.

[0014] In a preferred embodiment, a plurality of the grooves are provided, and the plurality of grooves are symmetrically distributed along the central axis of the ring.

[0015] In a preferred embodiment, the base is provided with a boss adapted to the groove.

[0016] In a preferred embodiment, the side wall of the groove and / or the side wall of the boss are provided with a guiding slope.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0018] (1) By providing a hollow circular ring, on the one hand, the overall weight of the beam can be reduced, and on the other hand, the circular ring in the center of the main body can enhance the structural strength of the main body, thereby improving the structural stability of the beam while reducing the weight. By providing reinforcing ribs between the circular ring and the outer wall, the overall structural strength of the beam is further improved, and the projection of the reinforcing ribs in the radial direction of the circular ring falls into the guide rail groove and / or the rack groove. The reinforcing ribs share the force from the rack and the guide rail, further improving the stability of the beam, and enhancing the support stability of the beam during the movement of the laser head, so as to meet the good cutting accuracy of the laser cutting machine when running at high speed. In addition, the overall weight of the beam is relatively light, which can reduce costs while ensuring cutting accuracy; at the same time, by improving the internal structure of the beam, the strength of the beam is enhanced while the weight of the beam is reduced, which can save costs and solve the problem of tight space for placing the laser cutting machine.

[0019] (2) By providing the first and second reinforcing ribs, the support strength of the crossbeam at the guide rail groove and the rack groove is further strengthened. Since the guide rail groove and the rack groove are provided on the outer wall, the projections of the first and second reinforcing ribs in the radial direction of the ring fall into the guide rail groove and the rack groove respectively, thereby strengthening the support effect at the bottom of the guide rail groove and the rack groove. This is beneficial for further improving the support strength at the guide rail groove and the rack groove when the laser head is running at high speed, improving the structural stability of the guide rail groove and the rack groove, and ensuring the stable operation of the laser head, thereby ensuring cutting accuracy.

[0020] (3) By setting up multiple reinforcing ribs, the overall structural strength of the beam is further strengthened. The reinforcing ribs are distributed in zones relative to the central cross section of the ring, and transverse reinforcing ribs and oblique reinforcing ribs are set up to strengthen the internal structural strength of the beam from different directions, thereby increasing the stress strength of the beam and avoiding stress concentration, thereby further strengthening the support stability of the beam. The transverse reinforcing ribs strengthen the radial support strength of the beam and disperse the radial stress of the ring. At the same time, the oblique reinforcing ribs are set up to further strengthen the axial support strength of the beam and disperse the axial stress of the ring, thereby avoiding deformation of the ring. This is beneficial for dispersing the stress of the beam as a whole when the laser head moves at high speed, thereby avoiding distortion and deformation, thereby further improving the overall structural stability of the beam when the laser head moves at high speed and ensuring cutting accuracy.

[0021] (4) The transverse reinforcement ribs are symmetrically arranged about the center cross section of the ring to further balance the radial force on the beam. The number of oblique reinforcement ribs below the center cross section of the ring is not less than the number of oblique reinforcement ribs above the center cross section of the ring, which is conducive to further dispersing the force on the bottom of the main body, thereby further strengthening the support strength of the bottom of the main body, and ensuring that the beam remains stable when the laser head runs at high speed.

[0022] (5) By setting inwardly extending ribs on the inner side of the outer wall, the force on the inner wall of the outer wall is changed. Compared with the straight wall, the wall surface with ribs has a better support effect, thereby further avoiding the deformation of the outer wall under force when the laser head runs at high speed, which is beneficial to the stable support effect of the outer wall and the guarantee of cutting accuracy.

[0023] (6) The reinforcing ribs and convex ribs cooperate with the guide rail groove and rack groove respectively to further improve the support strength of the guide rail groove and rack groove. The reinforcing ribs and convex ribs also increase the strength of the outer wall, improving the support and stability of the outer wall. When the laser head runs at high speed, the running stability of the laser head along the guide rail groove and rack groove is further ensured, thereby ensuring cutting accuracy.

[0024] (7) A groove is set at the bottom of the outer wall. On the one hand, the groove can reduce the overall weight of the beam and reduce the production cost. On the other hand, the groove is set at the bottom of the outer wall to enhance the effect of the bottom of the outer wall in resisting deformation, which is beneficial to ensure the stability of the beam during the operation of the laser head, thereby ensuring the cutting accuracy of the laser head.

[0025] (8) Multiple grooves are provided to further reduce the weight of the beam while improving the anti-deformation effect of the bottom of the outer wall. The grooves are provided at the bottom, and the wall surface where the guide grooves and the rack grooves are located remains complete, thereby avoiding instability of the laser head during operation, enhancing the supporting strength of the bottom of the outer wall, and being beneficial to the overall stability of the beam.

[0026] (9) By setting a boss on the base that is adapted to the groove, on the one hand, the boss extends into the groove to improve the support strength at the bottom of the outer wall; on the other hand, the boss cooperates with the groove, and when assembling the main body and the base, it is convenient to quickly and accurately align the main body and the base through the boss and the groove, thereby improving the installation efficiency and installation accuracy, which is conducive to ensuring the positioning and supporting effect of the base on the main body.

[0027] (10) The assembly efficiency and assembly accuracy of the main body and the base are further improved by setting the guide bevel. When the base and the main body are aligned, the guide bevel guides the groove and the boss during assembly, thereby achieving accurate assembly of the base and the main body more conveniently and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 This is a top view of a laser cutting machine in one embodiment of the present utility model;

[0030] Figure 2 This is a schematic diagram of the assembly of the beam and the laser head in one embodiment of the present utility model;

[0031] Figure 3 This is a schematic diagram of the crossbeam structure in one embodiment of the present utility model;

[0032] Figure 4 This is a cross-sectional view of a beam in one embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1-main body, 11-outer wall, 111-groove, 112-convex rib, 113-guide slope, 12-circular ring;

[0035] 2-base; 3-bed; 4-reinforcement rib, 41-first reinforcement rib, 42-second reinforcement rib, 43-transverse reinforcement rib, 44-oblique reinforcement rib; 5-motor; 6-laser head; 7-guide rail groove; 8-rack groove. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0037] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application may also be implemented in other ways than those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features of each embodiment may be combined with each other unless there is a conflict.

[0038] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0039] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0041] like Figures 1 to 4 As shown, the present application provides a laser cutting machine beam, including a main body 1 and a base 2, the main body 1 and the base 2 are fixedly connected, the base 2 is fixed to the machine tool of the laser cutting machine, and the laser head 6 of the laser cutting machine moves along the beam, the main body 1 includes an outer wall 11, a circular ring 12 is provided in the center of the outer wall 11, the interior of the circular ring 12 is hollow and extends axially along the main body 1 to the two ends connected to the outer wall 11, the beam is provided with a guide rail and a rack, the outer wall 11 is provided with a guide rail groove 7 cooperating with the guide rail and a rack groove 8 cooperating with the rack, a reinforcing rib 4 is provided between the circular ring 12 and the outer wall 11, and the projection of the reinforcing rib 4 in the radial direction of the circular ring 12 falls into the guide rail groove 7 and / or the rack groove 8.

[0042] By providing an internally hollow ring 12, on the one hand, the overall weight of the beam can be reduced, and on the other hand, the ring 12 in the center of the main body 1 can enhance the structural strength of the main body 1, thereby improving the structural stability of the beam while reducing weight. By providing a reinforcing rib 4 between the ring 12 and the outer wall 11, the overall structural strength of the beam is further improved, and the radial projection of the reinforcing rib 4 in the ring 12 falls into the guide rail groove 7 and / or the rack groove 8. The reinforcing rib 4 shares the force from the rack and the guide rail, further improving the stability of the beam, and enhancing the support stability of the beam during the movement of the laser head 6, thereby meeting the good cutting accuracy of the laser cutting machine when running at high speed. In addition, the overall weight of the beam is relatively light, which can reduce costs while ensuring cutting accuracy; by improving the internal structure of the beam, the strength of the beam is strengthened while the weight of the beam is reduced, which can save costs and solve the problem of tight space for placing the laser cutting machine.

[0043] like Figure 1 、 Figure 2As shown, it can be understood that this solution adopts a stretched aluminum beam, and the main body 1 is connected to the laser head 6 through a rack and a guide rail to realize the lateral movement of the laser head 6. The beam is connected between the motor 5, the guide rail and the bed 3 to realize the longitudinal movement of the laser head 6. The beam is composed of a main body 1 stretched as a whole and a base 2 on both sides. The main body 1 and the base 2 are fixedly connected by welding, which can greatly reduce the cost. Preferably, the main body 1 is set to be rectangular, and the horizontal dimension is slightly larger than the longitudinal dimension, which is conducive to the stability of the main body 1 during the horizontal movement of the laser head 6 along the beam, and can better ensure the cutting accuracy of the laser cutting machine when working at high speed.

[0044] like Figure 4 As shown, in one embodiment, the reinforcing rib 4 includes at least a first reinforcing rib 41 and a second reinforcing rib 42 , the projection of the first reinforcing rib 41 in the radial direction of the ring 12 falls into the guide rail groove 7 , and the projection of the second reinforcing rib 42 in the radial direction of the ring 12 falls into the rack groove 8 .

[0045] The first reinforcing ribs 41 and the second reinforcing ribs 42 are provided to further strengthen the support strength of the crossbeam at the guide rail groove 7 and the rack groove 8. Since the guide rail groove 7 and the rack groove 8 are provided on the outer wall 11, the projections of the first reinforcing ribs 41 and the second reinforcing ribs 42 in the radial direction of the ring 12 fall into the guide rail groove 7 and the rack groove 8, respectively, thereby strengthening the support effect at the bottom of the guide rail groove 7 and the rack groove 8. This is beneficial for further improving the support strength at the guide rail groove 7 and the rack groove 8 when the laser head 6 runs at high speed, improving the structural stability of the guide rail groove 7 and the rack groove 8, and ensuring the stable operation of the laser head 6, thereby ensuring cutting accuracy.

[0046] In another embodiment, the inner wall of the outer wall 11 is provided with an inwardly extending rib 112. By providing the inwardly extending rib 112 on the inner wall of the outer wall 11, the force applied to the inner wall of the outer wall 11 is changed. Compared with a straight wall surface, the wall surface provided with the rib 112 has a better support effect, thereby further preventing the outer wall 11 from being deformed by force when the laser head 6 runs at high speed, thereby facilitating the stable support effect of the outer wall 11 and ensuring cutting accuracy.

[0047] Furthermore, one of the projection of the reinforcing rib 4 in the radial direction of the ring 12 and the projection of the convex rib 112 in the lateral direction falls on the guide rail groove 7 , and the other falls on the rack groove 8 .

[0048] The reinforcing ribs 4 and the convex ribs 112 cooperate with the guide rail groove 7 and the rack groove 8, respectively, to further enhance the support strength of the guide rail groove 7 and the rack groove 8. Furthermore, the reinforcing ribs 4 and the convex ribs simultaneously enhance the strength of the outer wall 11, thereby enhancing the support and stability of the outer wall 11. When the laser head 6 operates at high speed, the laser head 6 further ensures the stable operation along the guide rail groove 7 and the rack groove 8, thereby ensuring cutting accuracy.

[0049] Preferably, the rib 112 is coaxially arranged with the guide rail groove 7 or the rack groove 8, and the lateral projection of the rib 112 covers the guide rail groove 7 or the rack groove 8. Figure 4 As shown, the rib 112 is provided so that its lateral projection covers the guide rail groove 7 , thereby further improving the strength support effect at the guide rail groove 7 .

[0050] like Figure 4 As shown, in one embodiment, a plurality of reinforcing ribs 4 are relatively distributed above and below the central cross section of the ring 12 , and transverse reinforcing ribs 43 and oblique reinforcing ribs 44 are provided above and below the central cross section of the ring 12 .

[0051] By setting up multiple reinforcing ribs 4, the overall structural strength of the beam is further strengthened. The reinforcing ribs 4 are distributed in zones relative to the central cross section of the ring 12, and transverse reinforcing ribs 43 and oblique reinforcing ribs 44 are set up to strengthen the internal structural strength of the beam from different directions, thereby increasing the stress strength of the beam and avoiding stress concentration, thereby further strengthening the support stability of the beam. The transverse reinforcing ribs 43 strengthen the radial support strength of the beam and disperse the radial stress of the ring 12. At the same time, the oblique reinforcing ribs 44 are set up to further strengthen the axial support strength of the beam and disperse the axial stress of the ring 12, thereby avoiding deformation of the ring 12 due to stress. This is beneficial for dispersing the stress of the beam as a whole when the laser head 6 moves at high speed, thereby avoiding distortion and deformation, thereby further improving the overall structural stability of the beam when the laser head 6 moves at high speed and ensuring cutting accuracy.

[0052] Furthermore, the transverse reinforcing ribs 43 are symmetrically arranged about the central cross section of the ring 12 , and the number of the oblique reinforcing ribs 44 located below the central cross section of the ring 12 is not less than the number of the oblique reinforcing ribs 44 located above the central cross section of the ring 12 .

[0053] The transverse reinforcing ribs 43 are symmetrically arranged about the central cross section of the ring 12 to further balance the radial force on the beam. The number of the oblique reinforcing ribs 44 below the central cross section of the ring 12 is not less than the number of the oblique reinforcing ribs 44 above the central cross section of the ring 12, which is beneficial to further disperse the force on the bottom of the main body 1, thereby further strengthening the supporting strength of the bottom of the main body 1, and ensuring that the beam remains supported and stable when the laser head 6 runs at high speed.

[0054] like Figure 4 As shown, in one embodiment, the bottom of the outer wall 11 is provided with an inwardly recessed groove 111 .

[0055] A groove 111 is provided at the bottom of the outer wall 11. On the one hand, the groove 111 reduces the overall weight of the beam and reduces the production cost. On the other hand, the groove 111 is provided at the bottom of the outer wall 11 to enhance the deformation resistance of the bottom of the outer wall 11, which is beneficial to ensure the stability of the beam during the operation of the laser head 6, thereby ensuring the cutting accuracy of the laser head 6.

[0056] Furthermore, a plurality of grooves 111 are provided, and the plurality of grooves 111 are symmetrically distributed along the central axis of the ring 12 .

[0057] The provision of multiple grooves 111 further reduces the weight of the beam while improving the anti-deformation effect of the bottom of the outer wall 11. The grooves 111 are provided at the bottom, and the wall surface where the guide grooves 7 and the rack grooves 8 are located remains complete, thereby avoiding instability of the laser head 6 during operation, enhancing the supporting strength of the bottom of the outer wall 11, and being beneficial to the overall stability of the beam.

[0058] Preferably, the base 2 is provided with a boss adapted to the groove 111 .

[0059] By providing a boss on the base 2 that is adapted to the groove 111, on the one hand, the boss extends into the groove 111 to improve the supporting strength at the bottom of the outer wall 11, and on the other hand, the boss cooperates with the groove 111. When assembling the main body 1 and the base 2, it is convenient to quickly and accurately align the main body 1 and the base 2 through the boss and the groove 111, thereby improving the installation efficiency and installation accuracy, thereby facilitating the positioning and supporting effect of the base 2 on the main body 1.

[0060] Furthermore, the side wall of the groove 111 and / or the side wall of the boss is provided with a guide slope 113. Figure 4 As shown, a guide slope 113 is formed on the side wall of the groove 111. The provision of the guide slope 113 further improves the assembly efficiency and assembly accuracy of the main body 1 and the base 2. When the base 2 and the main body 1 are aligned and installed, the guide slope 113 guides the groove 111 and the boss during assembly, thereby achieving accurate assembly of the base 2 and the main body 1 more conveniently and quickly.

[0061] In one embodiment, a protrusion is provided on the top of the outer wall 11, and the protrusion is provided with an inner concave surface to form a guide rail groove 7 and a rack groove 8. The side wall of the outer wall 11 is concave to form another guide rail groove 7, that is, the guide rail groove 7 and the rack groove 8 are directly formed by the outer wall 11, reducing the difficulty of assembly.

[0062] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0063] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0064] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A crossbeam for a laser cutting machine, comprising a main body and a base, wherein the main body is fixedly connected to the base, the base is fixed to a machine bed of the laser cutting machine, and the laser head of the laser cutting machine moves along the crossbeam, characterized in that: The main body includes an outer wall, a circular ring is provided at the center of the outer wall, the interior of the circular ring is hollow and extends axially along the main body to connect the two ends of the outer wall, the crossbeam is provided with a guide rail and a rack, the outer wall is provided with a guide rail groove cooperating with the guide rail and a rack groove cooperating with the rack, a reinforcing rib is provided between the circular ring and the outer wall, and the projection of the reinforcing rib in the radial direction of the circular ring falls into the guide rail groove and / or the rack groove.

2. A laser cutting machine crossbeam according to claim 1, characterized in that: The reinforcing ribs include at least a first reinforcing rib and a second reinforcing rib, wherein the projection of the first reinforcing rib in the radial direction of the ring falls into the guide rail groove, and the projection of the second reinforcing rib in the radial direction of the ring falls into the rack groove.

3. A laser cutting machine crossbeam according to claim 2, characterized in that: The plurality of reinforcing ribs are relatively distributed above and below the central cross section of the circular ring, and transverse reinforcing ribs and oblique reinforcing ribs are provided above and below the central cross section of the circular ring.

4. A laser cutting machine crossbeam according to claim 3, characterized in that: The transverse reinforcing ribs are symmetrically arranged about the central cross section of the circular ring, and the number of the oblique reinforcing ribs located below the central cross section of the circular ring is not less than the number of the oblique reinforcing ribs located above the central cross section of the circular ring.

5. The laser cutting machine crossbeam according to claim 1, characterized in that: The inner side of the outer wall is provided with convex ribs extending inwards.

6. A laser cutting machine crossbeam according to claim 5, characterized in that: A projection of the reinforcing rib in the radial direction of the circular ring and a projection of the convex rib in the lateral direction, one of which falls on the guide rail groove, and the other falls on the rack groove.

7. The laser cutting machine crossbeam according to claim 1, characterized in that: The bottom of the outer wall is provided with an inwardly recessed groove.

8. The laser cutting machine crossbeam according to claim 7, characterized in that: There are a plurality of grooves, and the plurality of grooves are symmetrically distributed along the central axis of the ring.

9. The laser cutting machine crossbeam according to claim 7, characterized in that: The base is provided with a boss matched with the groove.

10. A laser cutting machine crossbeam according to claim 9, characterized in that: The side wall of the groove and / or the side wall of the boss are provided with a guiding slope.

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