A beam assembly for a laser cutting machine

Abstract

The present invention discloses a beam assembly of a laser cutting machine in the field of laser cutting machine tools, wherein the beam includes a fixed end and a floating end, a rotating pressure plate 1 is provided on the front side of the floating end, and a rotating pressure plate 2 is provided on the rear side of the floating end; the front and rear sides of the beam corresponding to the floating end are inclined surfaces respectively, the rotating pressure plate 1 and the rotating pressure plate 2 are inclined surfaces corresponding to the beam in the longitudinal direction, and the surfaces of the rotating pressure plate 1 and the rotating pressure plate 2 facing the beam in the horizontal direction are arc-shaped surfaces; the floating end is fixed on the corresponding positioning seat through an elastic component. The present invention ensures that the accuracy of the machine tool will not change due to temperature; when the machine tool fails and the beam collides, it will not cause the straightness of the fuselage guide rail to deviate, the machine tool can recover quickly, and the beam will not be damaged.

Description

Technical Field

[0001] The invention relates to a laser cutting machine tool, in particular to a crossbeam device of a laser cutting machine. Background Art

[0002] In the prior art, the crossbeam of the laser cutting machine is fixed on the positioning seat, the lower part of the positioning seat is installed in the guide rail set on the fuselage through the slider, and the cutting head is movably installed on the crossbeam. The crossbeam of the laser cutting machine is generally made of two materials: aluminum and steel. The crossbeams of these two materials are integral, that is, the part connecting the crossbeam and the fuselage is integrated, and the fuselage is welded from thick steel plates. With the rapid development of laser cutting machines and the continuous improvement of laser power, high-power lasers have been widely used in laser cutting machines. When cutting thick plates, a larger laser power is required. The greater the power of the laser, the higher the temperature of the cutting residue. The residue falls onto the fuselage, and the temperature of the fuselage rises rapidly. The steel plate of the fuselage expands due to heat. If it is an aluminum beam, the thermal expansion coefficient of aluminum is about twice that of steel. When the fuselage and the beam rise to the same temperature, the aluminum beam elongates twice as much as the fuselage. If it is a steel beam, in order to improve the dynamic performance of the machine tool, the beam is designed to be lightweight and welded with thin plates. For the same material, the thicker the plate, the greater the thermal resistance and the lower the thermal conductivity. When the fuselage and the beam rise to the same temperature, the degree of change of the beam and the fuselage is also different. The beam of the laser cutting machine is above the fuselage. The beam and the fuselage are heated to different degrees and have no relationship with each other. No matter what material the beam and the fuselage are made of, when they are working, the heating conditions are different and the amount of change is also different, which will affect the accuracy of the machine tool and cause the cutting accuracy to deteriorate.

[0003] When a machine tool fails and the integral crossbeam collides, the straightness of the machine body guide rail will deviate, requiring the accuracy of the machine tool to be readjusted, which is labor-intensive and time-consuming, and may even damage the crossbeam. Summary of the invention

[0004] The purpose of the present invention is to provide a crossbeam assembly for a laser cutting machine, aiming to solve the shortcomings of the prior art. When the temperature of the machine body below the cutting head rises, the accuracy of the machine tool will not change due to temperature reasons; when the machine tool fails and the crossbeam collides, it will not cause the straightness of the machine body guide rail to deviate, the machine tool can recover quickly, and the crossbeam will not be damaged.

[0005] The object of the present invention is achieved as follows: a crossbeam assembly of a laser cutting machine comprises a crossbeam, the lower sides of both ends of the crossbeam are respectively installed in a guide rail arranged on a machine body through a positioning seat and a slider fixed on the lower side of the positioning seat, the crossbeam comprises a fixed end and a floating end, a rotating pressure plate 1 is arranged on the front side of the floating end, and a rotating pressure plate 2 is arranged on the rear side of the floating end; the front and rear sides of the crossbeam corresponding to the floating end are inclined surfaces respectively, the rotating pressure plate 1 and the rotating pressure plate 2 are inclined surfaces corresponding to the crossbeam in the longitudinal direction, and the rotating pressure plate 1 and the rotating pressure plate 2 are inclined surfaces corresponding to the crossbeam in the horizontal direction. The surface of the second pressure plate facing the cross beam is an arc-shaped surface; the rotating pressure plate one is fixedly connected to the positioning seat of the floating end; a positioning cover plate is provided on the upper side of the rotating pressure plate two, and the rotating pressure plate two can be movably arranged in the positioning cover plate, and the positioning cover plate is fixedly connected to the positioning seat of the floating end, and a support block is provided on the positioning seat at the rear side of the rotating pressure plate two, and an elastic member mounting hole is provided on the support block, and an elastic component is installed in the elastic member mounting hole, one end of the elastic component elastically contacts the rotating pressure plate two, and a clamping screw for pushing the elastic component from the rear end is installed in the elastic member mounting hole.

[0006] When installing the present invention, the fixed end of the beam is first connected to the positioning seat of the fixed end, and the positioning seat of the fixed end is connected to the slider, and the slider is arranged in a guide rail on the fuselage. The fixed end is installed on the fuselage and can move linearly along the guide rail. The floating end is installed in the guide rail on the other side of the fuselage through the connection structure of the present invention. The elastic component pushes the rotating pressure plate 2 to press the floating end of the beam between the rotating pressure plate 1 and the rotating pressure plate 2. The inclined surface fixes the floating end in both the horizontal and longitudinal directions. The surfaces of the rotating pressure plate 1 and the rotating pressure plate 2 facing the beam are arc-shaped surfaces, so that the rotating pressure plate 1 and the rotating pressure plate 2 are in line contact with the beam at the floating end. The beam can adapt to the rotation position, making its installation more convenient. When cutting parts, high-temperature cutting residues fall onto the machine body, and the machine body expands due to heat, causing the center distance between the two guide rails on the machine body to change. In the present invention, since the connecting seat of the floating end of the beam is separated from the beam, the rotating pressure plate 1 and the rotating pressure plate 2 are both arc surfaces that fit the inclined surface on the beam, and the floating end of the machine body and the beam relative to the fixed end of the beam simultaneously undergo adaptive displacement, so that the accuracy of the machine tool remains unchanged, ensuring that the cutting accuracy is stable and unchanged. When the machine tool fails, such as when the beam collides, the beam will rotate to a certain extent, and the elastic component can buffer the impact. At the same time, the floating end of the beam can also correct itself under the action of the elastic component and return to the initial position. Compared with the prior art, the beneficial effects of the present invention are: the accuracy of the machine tool will not change due to temperature; when the machine tool fails and the beam collides, the straightness of the machine body guide rail will not deviate, the machine tool can recover quickly, and the beam will not be damaged.

[0007] The further improvement of the present invention is that two front and rear sliders are respectively installed on the lower side of the positioning seat corresponding to the fixed end and the floating end of the beam, and each slider is connected to the positioning seat by four screws, wherein any one of the eight screw holes on the positioning seat of the fixed end is a reference circular hole, in which a shoulder screw is installed, and the remaining seven holes are arc holes, and the center of the arc of the arc hole coincides with the center of the reference circular hole; the positioning seat of the floating end is fixedly connected to the two sliders on the guide rail by screws. This scheme enables the beam to provide an installation positioning reference through the shoulder screw and the reference circular hole when it is installed, and the remaining components are installed based on this as a reference, which makes the machine tool easy to install and easy to adjust the positioning accuracy. When the beam fails and collides, the entire beam can rotate around the shoulder screw at a certain angle, and cooperate with the floating end structure, so that the beam can also return to its initial position after the collision, and the accuracy of the machine tool can be quickly restored without excessive manual intervention, saving time and effort. It avoids the irreversible deformation or even damage of the beam and the deviation of the accuracy of the fuselage guide rail, and reduces the risk cost of the user.

[0008] A further improvement of the present invention is that a pad is provided on the upper side of the rotating pressing plate 1, and the pad and the rotating pressing plate 1 are fixedly connected to the positioning seat at the floating end. The rotating pressing plate 1 is fixed by the pad so that it is reliably fixed.

[0009] A further improvement of the present invention is that the elastic component includes a plurality of disc springs installed in the elastic member installation hole, a compression gasket is provided between one side of the disc spring and the end of the compression screw, a guide column is provided between the other side of the disc spring and the rear side of the second rotating pressure plate, a pressure pad is fixed to the rear surface of the second rotating pressure plate, one end of the guide column is inserted into the elastic member installation hole, and the other end abuts against the pressure pad. The guide column has a certain elastic avoidance margin, and two elastic member installation holes can be provided at intervals on the support block, which can better fix the floating end of the beam.

[0010] A further improvement of the present invention is that a sliding plate is provided between the lower side of the crossbeam and the positioning upper surface, so that the crossbeam will not be damaged during the adaptive movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the crossbeam assembly of the laser cutting machine of the present invention installed on the machine body.

[0012] Figure 2 for Figure 1 A partial enlarged view of middle A.

[0013] Figure 3 for Figure 1 A partial enlarged view of B.

[0014] Figure 4 It is a front view of the crossbeam assembly of the laser cutting machine of the present invention.

[0015] Figure 5 It is a top view of the crossbeam assembly of the laser cutting machine of the present invention.

[0016] Figure 6 for Figure 4 CC view.

[0017] Figure 7 for Figure 6 A partial enlarged view of E.

[0018] Figure 8 for Figure 4 DD direction view.

[0019] In the figure, 1 is the body, 2 is the guide rail, 3 is the cutting head, 4 is the crossbeam, 4a is the fixed end, 4b is the floating end, 5 is the positioning cover plate, 6 is the support block, 7 is the slider, 8 is the positioning seat of the floating end, 9 is the positioning seat of the fixed end, 10 is the pad, 11 is the second rotating pressure plate, 12 is the pressure pad, 13 is the guide column, 14 is the clamping screw, 15 is the sliding plate, 16 is the first rotating pressure plate, 17 is the disc spring, h01-h08 is the screw hole, and m and n are the inclined surfaces. DETAILED DESCRIPTION

[0020] like Figure 1-8 As shown, a beam assembly of a laser cutting machine is shown, wherein the two ends of the beam 4 are respectively installed in the guide rail 2 provided on the machine body 1 through the positioning seat and the slider 7, the slider 7 is fixed on the lower side of the positioning seat, and the cutting head 3 is movably installed on the beam 4, and the beam 4 includes a fixed end 4a and a floating end 4b, a rotating pressing plate 16 is provided on the front side of the floating end 4b, and a rotating pressing plate 2 11 is provided on the rear side of the floating end 4b; the front and rear sides of the beam 4 corresponding to the floating end 4b are inclined surfaces, such as Figure 7 As shown in m and n, m and n are inclined surfaces; the rotating pressing plate 1 16 and the rotating pressing plate 2 11 are inclined surfaces corresponding to the beam 4 in the longitudinal direction, and the surfaces of the rotating pressing plate 1 16 and the rotating pressing plate 2 11 facing the beam 4 in the horizontal direction are arc-shaped surfaces, and the whole is an inclined surface with an arc. Figure 8 R in the middle indicates the radius of gyration of the arc surface; the rotating pressure plate 16 is fixedly connected to the positioning seat 8 at the floating end; a positioning cover plate 5 is provided on the upper side of the rotating pressure plate 2 11, and the rotating pressure plate 2 11 is movably arranged in the positioning cover plate 5, and the positioning cover plate 5 is fixedly connected to the positioning seat 8 at the floating end, and a support block 6 is provided on the positioning seat at the rear side of the rotating pressure plate 2 11, and an elastic member mounting hole is provided on the support block 6, and an elastic component is installed in the elastic member mounting hole, one end of the elastic component elastically contacts the rotating pressure plate 2 11, and a clamping screw 14 for pushing the elastic component from the rear end is installed in the elastic member mounting hole.

[0021] Two front and rear sliders 7 are respectively installed on the lower side of the positioning seats corresponding to the fixed end 4a and the floating end 4b of the crossbeam 4. Each slider 7 is installed in the screw holes on the positioning seat through four screws. Among them, any one of the eight screw holes on the positioning seat 9 of the fixed end is a reference circular hole, in which a shoulder screw is installed, and the remaining seven holes are arc holes, and the center of the arc of the arc hole coincides with the center of the reference circular hole; Figure 5 As shown, the eight holes are h01, h02, h03, h04, h05, h06, h07, and h08, among which h01 is a reference circular hole with a shoulder screw installed; h02, h03, h04, h05, h06, h07, and h08 are arc holes.

[0022] The positioning seat 8 at the floating end is fixedly connected to the two sliding blocks 7 on the guide rail 2 by screws.

[0023] A backing plate 10 is provided on the upper side of the rotating pressing plate 16, and the backing plate 10 and the rotating pressing plate 16 are fixedly connected to the positioning seat 8 at the floating end.

[0024] The elastic component includes a plurality of disc springs 17 installed in the elastic member installation hole, a compression gasket is provided between one side of the disc spring 17 and the end of the compression screw 14, a guide column 13 is provided between the other side of the disc spring 17 and the rear side of the second rotating pressure plate 11, a pressure pad 12 is fixed to the rear side surface of the second rotating pressure plate 11, one end of the guide column 13 is inserted into the elastic member installation hole, and the other end abuts against the pressure pad 12. The disc spring 17 can also be a spring or an elastic pad.

[0025] Two elastic member mounting holes are provided on the support block 6 at intervals.

[0026] A sliding plate 15 is provided between the lower side of the cross beam 4 and the positioning upper surface.

[0027] This solution provides a mounting and positioning reference for the beam 4 through the shoulder screw and the reference circular hole during installation, and the rest of the components are installed based on this reference, making the machine tool easy to install and easy to adjust the positioning accuracy. The floating end 4b is installed in the guide rail 2 on the other side of the fuselage 1 through the connection structure of the present invention, and the disc spring 17 pushes the rotating pressure plate 2 11 to press the floating end 4b of the beam 4 between the rotating pressure plate 1 16 and the rotating pressure plate 2 11. The inclined surface fixes the floating end 4b in both the horizontal and longitudinal directions, and the surfaces of the rotating pressure plate 1 16 and the rotating pressure plate 2 11 facing the beam 4 are arc-shaped surfaces, so that the rotating pressure plate 1 16 and the rotating pressure plate 2 11 are in line contact with the beam 4 at the floating end 4b, and the beam 4 can adapt to the rotation position, making it more convenient to install. When cutting parts, high-temperature cutting residues fall onto the fuselage 1, and the fuselage 1 expands due to heat, causing the center distance between the two guide rails 2 on the fuselage 1 to change. In the present invention, since the connection seat of the floating end 4b of the beam 4 is separated from the beam 4, the rotating pressure plate 1 16 and the rotating pressure plate 2 11 are both arc surfaces that fit the inclined surface on the beam 4, and the fuselage 1 and the floating end 4b of the beam are adaptively displaced relative to the fixed end 4a of the beam 4 at the same time, so that the accuracy of the machine tool remains unchanged, ensuring that the cutting accuracy is stable and unchanged. When the machine tool fails, the beam 4 as a whole can rotate around the shoulder screw to a certain angle, and cooperate with the floating end 4b structure, so that the beam 4 can return to its original position after a collision, and the accuracy of the machine tool can be quickly restored without excessive manual intervention, saving time and effort. It avoids irreversible deformation or even damage of the beam 4 and the deviation of the accuracy of the fuselage and guide rails, reducing the risk cost of users.

[0028] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present invention, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A beam assembly for a laser cutting machine, comprising a beam, wherein both ends of the beam are respectively installed in a guide rail provided on a machine body via a positioning seat and a slider, wherein the slider is fixed to the lower side of the positioning seat, and wherein: The crossbeam comprises a fixed end and a floating end, a rotating pressure plate 1 is provided on the front side of the floating end, and a rotating pressure plate 2 is provided on the rear side of the floating end; the front and rear sides of the crossbeam corresponding to the floating end are inclined surfaces respectively, and the rotating pressure plate 1 and the rotating pressure plate 2 are inclined surfaces corresponding to the crossbeam in the longitudinal direction, and the surfaces of the rotating pressure plate 1 and the rotating pressure plate 2 facing the crossbeam in the horizontal direction are arc surfaces; the rotating pressure plate 1 is fixedly connected to the positioning seat of the floating end; a positioning cover plate is provided on the upper side of the rotating pressure plate 2, and the rotating pressure plate 2 can be movably arranged in the positioning cover plate, and the positioning cover plate is fixedly connected to the positioning seat of the floating end, and a support block is provided on the positioning seat at the rear side of the rotating pressure plate 2, and an elastic member mounting hole is provided on the support block, and an elastic component is installed in the elastic member mounting hole, and one end of the elastic component elastically contacts the rotating pressure plate 2, and a clamping screw that pushes the elastic component from the rear end is installed in the elastic member mounting hole; the fixed end and the floating end of the crossbeam Two front and rear sliding blocks are respectively installed on the lower side of the positioning seat corresponding to the moving end, and each sliding block is installed in the screw hole on the positioning seat by four screws. Among them, any one of the eight screw holes on the positioning seat of the fixed end is a reference circular hole, in which a shoulder screw is installed, and the remaining seven holes are arc holes, and the center of the arc of the arc hole coincides with the center of the reference circular hole; the positioning seat of the floating end is fixedly connected to the two sliding blocks on the guide rail by screws; a pad is provided on the upper side of the rotating pressure plate 1, and the pad and the rotating pressure plate 1 are fixedly connected to the positioning seat of the floating end; the elastic component includes a plurality of disc springs installed in the mounting hole of the elastic member, a clamping gasket is provided between one side of the disc spring and the end of the clamping screw, a guide column is provided between the other side of the disc spring and the rear side of the rotating pressure plate 2, a pressure pad is fixed to the rear surface of the rotating pressure plate 2, one end of the guide column is inserted into the mounting hole of the elastic member, and the other end abuts against the pressure pad.

2. The crossbeam assembly of a laser cutting machine according to claim 1, characterized in that: Two elastic member mounting holes are arranged at intervals on the supporting block.

3. A beam assembly for a laser cutting machine according to claim 1 or 2, characterized in that: A sliding plate is provided between the lower side of the crossbeam and the positioning upper surface.

Images