Gantry welding equipment with balance weight
By designing a gantry structure with counterweight in laser welding equipment, using counterweight box pulling and rack-and-pin driving methods, the problem of insufficient accuracy and stability during welding of large-scale workpieces in the prior art is solved, and high-precision and large-scale welding movement is achieved.
Patent Information
- Application Number
- CN202421562424.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-03
AI Technical Summary
The gantry structure of existing laser welding equipment cannot achieve high-precision welding when processing large workpieces, especially workpieces with vertical heights exceeding 4m, because the accuracy and stability of the lead screw are insufficient.
A gantry welding equipment with counterweight is designed. By setting up a counterweight box to pull the vertical carrier plate, the gear rack drive and the guide rails cooperate with the slider to achieve large-size and high-precision movement of the laser head in the vertical direction.
The laser head is moved in a large size in the vertical direction, which improves the welding range, reduces friction resistance, extends the service life of the guide rails and sliders, reduces the motor load, and improves the movement speed and accuracy.
Smart Images
Figure CN222944714U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of laser welding, in particular to a gantry welding device with a counterweight. Background Art
[0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Laser welding is one of the important aspects of the application of laser material processing technology. In the 1970s, it was mainly used for welding thin-walled materials and low-speed welding. The welding process is a heat conduction type, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction. By controlling the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. Due to its unique advantages, it has been successfully applied to the precision welding of micro and small parts.
[0003] At present, there are two main types of gantry structures for laser welding equipment. One is that the crossbeam is different, and the welding assembly moves up and down on the crossbeam, such as the gantry laser welding machine disclosed in patent CN115302083A. The welding assembly of this method has a small vertical movement range; the other is that the crossbeam drives the welding assembly to move, such as the laser vision welding tracking three-axis gantry laser welding machine disclosed in patent CN211680513U. The crossbeam drives the welding head to move up and down. Compared with the first type, the up and down movement range of the laser head is increased, and the crossbeam is driven by the combination of a motor and a lead screw. When the length is relatively large, the accuracy and stability of the lead screw will be reduced. Therefore, the method driven by a motor and a lead screw can only be applied to the welding of small and medium-sized workpieces. It cannot be achieved for large welding with a vertical height of more than 4m. Utility Model Content
[0004] The utility model aims at the above-mentioned deficiencies in the prior art and provides a gantry welding device with a counterweight. At the same time, a counterweight box is provided to pull the vertical carrier plate, thereby realizing large-size and high-precision movement of the laser head in the vertical direction and improving the welding range.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A gantry welding device with a counterweight comprises a workbench and a laser welding assembly, wherein two parallel columns are connected to the upper end of the workbench, the laser welding assembly comprises a laser head, a movable crossbeam is connected between the two columns, a parallel first guide rail and a first rack are provided on the side walls of the columns, vertical carrier plates are connected at both ends of the movable crossbeam, a first motor and a first slider matched with the first guide rail are provided on the side walls of the vertical carrier plates, a first gear meshed with the first rack is connected to the output shaft of the first motor, a counterweight box is provided on the side of the column away from the movable crossbeam, the counterweight box is connected to the vertical carrier plate by a chain, a fixed pulley supporting the chain is provided on the upper end of the column, a slidable transverse carrier plate is connected to one side of the movable crossbeam, and the laser head is connected to the transverse carrier plate.
[0007] Preferably, fixed pulleys connected to the upper ends of the columns are provided above the counterweight box and the vertical carrier plate.
[0008] Preferably, a steel rail is provided on the side wall of the column, and a guide wheel is provided on the side wall of the counterweight box, and the guide wheel is clamped on both sides of the steel rail.
[0009] Preferably, a pull rod is connected to the upper end of the counterweight box, a first pull ring connected to a chain is provided on the pull rod, and a second pull ring connected to the chain is provided at the upper end of the vertical carrier plate.
[0010] Preferably, the upper ends of the two columns are connected by a fixed crossbeam.
[0011] Preferably, a parallel second guide rail and a second rack are provided on the side wall of the movable crossbeam, a second motor and a second slider matched with the second guide rail are provided on the transverse carrier plate, and a second gear meshing with the second rack is provided on the output shaft of the second motor.
[0012] Preferably, both ends of the horizontal carrier plate and the vertical carrier plate are connected with accordion protective covers.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] 1. The utility model realizes a large range of horizontal movement of the movable beam on the column by means of gear rack drive and the cooperation of the guide rail and the slider. At the same time, a counterweight box is provided to pull the vertical carrier plate, thereby greatly reducing the friction resistance between the first slide rail and the first guide rail, which not only improves the service life and matching accuracy of the first slide rail and the first guide rail, but also reduces the load of the first motor, improves the moving speed of the movable beam driven by the first motor, realizes large size (vertical formation exceeds 4m) and high-precision movement of the laser head in the vertical direction, and improves the welding range.
[0015] 2. The counterweight box of the utility model avoids shaking when the counterweight box moves up and down through the cooperation of the guide wheels and the rails, thereby ensuring the stability and safety of the counterweight box.
[0016] 3. The transverse carrier of the utility model adopts the gear rack drive and the cooperation of the guide rail and the slider to increase the transverse movement range, accuracy and stability of the laser head. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is the front view of the utility model;
[0018] Figure 2 It is a left view of the utility model;
[0019] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at point A;
[0020] Figure 4 It is a structural schematic diagram of the counterweight box;
[0021] Figure 5 It is a structural schematic diagram of a vertical carrier plate;
[0022] Figure 6 It is a schematic diagram of the structure of the horizontal carrier plate;
[0023] In the figure: 1-fixed crossbeam; 2-counterweight box; 201-pull rod; 202-first pull ring; 203-guide wheel; 3-column; 301-first guide rail; 302-first rack; 303-fixed pulley; 304-rail; 4-vertical carrier plate; 401-first slider; 402-first gear; 402-second pull ring; 404-first motor; 5-movable crossbeam; 501-second guide rail; 502-second rack; 6-transverse carrier plate; 601-second motor; 602-second gear; 603-second slider; 7-organ protective cover; 8-chain. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] like Figure 1 As shown, a gantry welding device with a counterweight includes a workbench and a laser welding assembly. The laser welding assembly includes conventional equipment such as a laser head, and the welding assembly is prior art.
[0026] The upper end of the workbench is connected to two parallel columns 3, a movable crossbeam 5 is connected between the two columns 3, a parallel first guide rail 301 and a first rack 302 are provided on the side walls of the columns 3, and both ends of the movable crossbeam 5 are connected to a vertical carrier plate 4, such as Figure 5 As shown, a first motor 404 and a first slider 401 matched with the first guide rail 301 are provided on the side wall of the vertical carrier 4, and a first gear 402 meshing with the first rack 302 is connected to the output shaft of the first motor 404. The vertical carrier 4 slides along the first guide rail 301 through the drive of the first motor 404. Figure 2 As shown, a counterweight box 2 is provided on the side of the column 3 away from the movable crossbeam 5. The counterweight box 2 is connected to the vertical carrier plate 4 by a chain 8. A fixed pulley 303 for supporting the chain 8 is provided at the upper end of the column 3. According to the weight of the movable crossbeam 5, counterweight objects are added to the counterweight box 2. The counterweight box 2 pulls the vertical carrier plate 4 through the chain 8, thereby greatly reducing the friction resistance between the first slide rail and the first guide rail 301, which not only improves the service life and matching accuracy of the first slide rail and the first guide rail 301, but also reduces the load of the first motor 404, improves the moving speed of the movable crossbeam 5 driven by the first motor 404, and realizes large-scale vertical movement (vertical formation exceeds 4m).
[0027] A slidable transverse carrier plate 6 is connected to one side of the movable crossbeam 5 , and the laser head is connected to the transverse carrier plate 6 , so that the laser head can be driven to move transversely through the transverse carrier plate 6 .
[0028] Similarly, in order to increase the lateral travel and stability, a parallel second guide rail 501 and a second rack 502 are provided on the side wall of the movable crossbeam 5, as shown in FIG. Figure 6 As shown, the transverse carrier plate 6 is provided with a second motor 601 and a second slider 603 matched with the second guide rail 501 , and the output shaft of the second motor 601 is provided with a second gear 602 meshing with the second rack 502 .
[0029] In addition, in order to improve the overall stability and reliability of the device:
[0030] like Figure 3 As shown, fixed pulleys 303 connected to the upper ends of the columns 3 are provided above the counterweight box 2 and the vertical carrier plate 4 to ensure that the chain 8 is horizontal and vertical, so that the counterweight box 2 and the vertical carrier plate 4 are subjected to vertical forces.
[0031] In order to improve the stability of the counterweight block, a steel rail 304 is provided on the side wall of the column 3, and a guide wheel 203 is provided on the side wall of the counterweight box 2. The guide wheel 203 is clamped on both sides of the steel rail 304 to prevent the counterweight box 2 from swinging during movement.
[0032] like Figure 4As shown, the upper end of the counterweight box 2 is connected to a pull rod 201, and the pull rod 201 is provided with a first pull ring 202 connected to the chain 8. The upper end of the vertical carrier plate 4 is provided with a second pull ring 403 connected to the chain 8, which increases the convenience of installing the chain 8.
[0033] In addition, the upper ends of the two columns 3 are connected by a fixed crossbeam 1 to improve the stability and structural strength of the columns 3. Both ends of the horizontal carrier plate 6 and the vertical carrier plate 4 are connected with an accordion protective cover 7 to improve the aesthetics and safety of use.
[0034] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
Claims
1. A gantry welding device with a counterweight, comprising a workbench and a laser welding assembly, wherein the upper end of the workbench is connected to two parallel columns, and the laser welding assembly comprises a laser head, characterized in that: A movable crossbeam is connected between the two columns, and a parallel first guide rail and a first rack are provided on the side walls of the columns. Both ends of the movable crossbeam are connected to vertical carriers, and a first motor and a first slider cooperating with the first guide rail are provided on the side walls of the vertical carrier. A first gear meshing with the first rack is connected to the output shaft of the first motor. A counterweight box is provided on the side of the column away from the movable crossbeam, and the counterweight box is connected to the vertical carrier by a chain. A fixed pulley supporting the chain is provided at the upper end of the column, and a slidable transverse carrier is connected to one side of the movable crossbeam, and the laser head is connected to the transverse carrier.
2. A gantry welding device with a counterweight as claimed in claim 1, characterized in that: The counterweight box and the vertical carrier plate are both provided with fixed pulleys connected with the upper ends of the columns.
3. A gantry welding device with a counterweight as claimed in claim 1, characterized in that: Steel rails are arranged on the side walls of the upright posts, guide wheels are arranged on the side walls of the counterweight box, and the guide wheels are clamped on both sides of the steel rails.
4. A gantry welding device with a counterweight as claimed in claim 1, characterized in that: The upper end of the counterweight box is connected with a pull rod, and the pull rod is provided with a first pull ring connected with a chain, and the upper end of the vertical carrier plate is provided with a second pull ring connected with the chain.
5. A gantry welding device with a counterweight as claimed in claim 1, characterized in that: The upper ends of the two columns are connected by a fixed crossbeam.
6. A gantry welding device with a counterweight as claimed in claim 1, characterized in that: A parallel second guide rail and a second rack are provided on the side wall of the movable crossbeam, a second motor and a second slider matched with the second guide rail are provided on the transverse carrier plate, and a second gear meshed with the second rack is provided on the output shaft of the second motor.
7. A gantry welding device with a counterweight as claimed in claim 6, characterized in that: Both ends of the horizontal carrier plate and the vertical carrier plate are connected with accordion protective covers.