A dual station laser welding apparatus

Abstract

The utility model discloses a kind of double-station laser welding equipment, including rack, workstation, double-station fixture area being set on workstation, three-axis motion mechanism and laser welding head;The three-axis motion mechanism is constituted by transverse motion module, longitudinal guide rail assembly and lifting module, and laser welding head is installed in the bottom of lifting module and can cover double-station fixture area. Workstation pedestal and fixture assembly are set in each station, fixture assembly is equipped with pneumatic drive assembly, pneumatic drive assembly includes cylinder, piston rod, connecting piece and swing rod, cylinder drives piston rod telescoping and drives fixture assembly action by connecting piece and swing rod;Workstation pedestal can be provided with zero point positioning structure and pneumatic locking structure to realize the quick positioning and locking of clamp. The equipment structure is compact, suitable for double-station parallel operation and quick change production scene.

Description

Technical Field

[0001] This utility model relates to the field of laser welding equipment technology, and more specifically to a dual-station laser welding device. Background Technology

[0002] Laser welding, with its small heat-affected zone, minimal welding deformation, and stable weld quality, has been widely applied in the assembly and welding of metal structural components, profile connectors, and small parts. In actual production, the demand for flexible manufacturing with multiple varieties and small batches is becoming increasingly prominent. Enterprises often need to frequently switch between different workpieces and different weld types on the same equipment, while ensuring cycle time and balancing clamping and positioning accuracy with welding consistency.

[0003] Many existing laser welding equipment employs single-station structures or motion mechanisms with limited station coverage. When the laser welding head is performing welding at a station, operators often cannot simultaneously complete clamping, material handling, and other actions at the same station, leading to waiting time caused by the sequential execution of welding and material loading / unloading, resulting in low overall equipment utilization. Even with dual-station or multi-station equipment, insufficient matching between the laser welding head's motion coverage and the station layout, or unstable switching and positioning references between stations, can also affect continuous operation and repeatability accuracy.

[0004] On the other hand, in multi-product changeover scenarios, traditional fixtures are time-consuming to disassemble, reposition, and adjust, and rely on manual alignment and experience-based adjustments, which can easily lead to problems such as poor clamping repeatability and workpiece datum drift, thus affecting welding position accuracy and weld consistency. In addition, some equipment still requires professional personnel to perform relatively complex programming or segment-by-segment teaching in path setting, resulting in long debugging cycles and high operational thresholds during model changeovers, making it difficult to meet the production cycle requirements of frequent product changeovers.

[0005] Therefore, there is an urgent need for a laser welding equipment with a structure layout that is more suitable for parallel operation of two workstations, a laser welding motion mechanism that can stably cover the area of ​​the two workstation fixtures, and a laser welding equipment that is easier to switch quickly and move stably in terms of clamping, positioning and driving execution of the workstation fixtures, so as to better meet the needs of flexible production of multiple varieties and small batches. Utility Model Content

[0006] The present invention aims to provide a dual-station laser welding device, which enables the laser welding head to cover two stations and provides each station's fixture assembly with a stable pneumatic drive structure, thereby improving the overall applicability and operational reliability of the structure.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A dual-station laser welding device includes: a frame; a worktable disposed on the top of the frame; a dual-station fixture area disposed on the worktable, the dual-station fixture area including a first station and a second station disposed at intervals from each other; a transverse motion module disposed on the rear side of the frame; a longitudinal guide rail assembly disposed below and connected to the transverse motion module; a lifting module disposed on the longitudinal guide rail assembly; and a laser welding head mounted on the bottom of the lifting module.

[0009] The horizontal motion module, the vertical guide rail assembly, and the lifting module constitute a three-axis motion mechanism, enabling the laser welding head to move above the worktable and cover the first and second workstations.

[0010] Furthermore, each station in the dual-station fixture area is equipped with a station base and a fixture assembly mounted on the station base.

[0011] Preferably, each fixture assembly at each workstation is equipped with a pneumatic drive assembly, which includes a cylinder, a piston rod, a connector, and a swing rod. The cylinder is mounted on the workstation base, the piston rod extends from the cylinder, the connector is located at the end of the piston rod and hinged to the swing rod, and the swing rod is connected to the fixture assembly.

[0012] Preferably, the piston rod extends and retracts, causing the connecting member to swing, thereby causing the swing rod to swing and driving the fixture assembly to move.

[0013] Preferably, the connector is a joint connection structure, and the connector is rotatably connected to the piston rod and the swing rod respectively.

[0014] Preferably, the swing rod is a long rod structure, with one end of the swing rod hinged to the connector and the other end connected to the fixture assembly.

[0015] Preferably, the lateral motion module is arranged along the left-right direction of the worktable, and the longitudinal guide rail assembly is arranged along the front-back direction of the worktable.

[0016] Preferably, the laser welding head has a laser welding head extension at its front end.

[0017] Preferably, a handheld operator placement seat is provided on the front side of the frame.

[0018] Preferably, the laser welding head is connected to the cables inside the frame via a cable chain.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) The three-axis motion mechanism, consisting of a transverse motion module, a longitudinal guide rail assembly, and a lifting module, enables the laser welding head to cover the dual-station fixture area, improving the applicability of the structural layout.

[0021] 2) Each workstation is equipped with a pneumatic drive structure consisting of a cylinder, piston rod, connector and swing rod. The drive chain is clear, which facilitates the stable operation of the fixture components.

[0022] 3) The combination of the dual-station structure and the fixture drive structure makes the equipment structure more suitable for dual-station welding operation scenarios. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the dual-station laser welding equipment of this utility model;

[0025] Figure 2 This is a schematic diagram of the dual-station laser welding equipment of this utility model from another perspective;

[0026] Figure 3 This is a schematic diagram of the fixture structure of a single-sided station in the dual-station fixture area of ​​this utility model.

[0027] Among them, 1-frame; 2-workbench; 21-station base; 3-dual-station fixture area; 31-cylinder; 32-piston rod; 33-connector; 34-swing rod; 35-fixture assembly; 4-lateral motion module; 5-longitudinal guide rail assembly; 6-laser welding head; 7-laser welding head extension; 8-handheld operator placement seat. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example

[0030] like Figures 1 to 3As shown, the dual-station laser welding equipment in this embodiment includes a frame 1, a worktable 2, a dual-station fixture area 3, a transverse motion module 4, a longitudinal guide rail assembly 5, a lifting module, and a laser welding head 6. The dual-station fixture area 3 is set on the worktable 2 and includes a first station and a second station spaced apart from each other to form a symmetrical dual-station layout. The laser welding head 6 is installed at the end of a three-axis motion mechanism, which consists of the transverse motion module 4, the longitudinal guide rail assembly 5, and the lifting module, so that the movement range of the laser welding head 6 covers the processing areas of both stations, thereby enabling loading and unloading operations at the other station while welding is being performed at one station.

[0031] Combination Figure 3 The single-sided workstation fixture structure shown has a workstation base 21 at each workstation, on which a fixture assembly 35 is mounted. The fixture assembly 35 is equipped with a pneumatic drive assembly, which includes a cylinder 31, a piston rod 32, a connecting member 33, and a swing rod 34. The cylinder 31 is fixedly mounted on the workstation base 21, and the piston rod 32 extends from the cylinder 31. The connecting member 33 is located at the end of the piston rod 32 and hinged to the swing rod 34, which is connected to the fixture assembly 35. In actual operation, the cylinder 31 drives the piston rod 32 to extend and retract, and the connecting member 33 drives the swing rod 34 to swing, thereby driving the fixture assembly 35 to complete clamping or releasing actions, realizing the switching of workpiece clamping at the workstation.

[0032] In this embodiment, to adapt to flexible production of multiple varieties and small batches, each workstation base can integrate a zero-point positioning structure and a pneumatic locking structure: the zero-point positioning structure adopts a ball-cone fit or pin-hole fit to provide a repeatable positioning reference for the special fixture; the pneumatic locking structure uses a cylinder to drive a pull pin or locking pin to quickly and rigidly lock the special fixture with a standard interface onto the workstation base, so as to realize the quick replacement and quick reset of the fixture.

[0033] This embodiment also includes a dedicated control system. The control system adopts a combined architecture of industrial PC and PLC, which are used for human-machine interaction, data management, and linkage control of motion / actuators, respectively. The control system has a built-in welding process database, which is used to store and call up corresponding welding process packages for different products. The welding process package includes at least parameters such as laser power, welding speed, frequency, and shielding gas flow rate. When switching production, after the operator selects the target product on the control system interface, the control system automatically loads the corresponding process package and sends the process parameters to the laser welding head and related execution units.

[0034] To reduce the difficulty of path programming, the control system provides a three-point teaching path generation function. During production changeover and debugging, the operator is guided by a handheld teaching pendant or touch screen to sequentially mark the starting point A, the intermediate point B, and the ending point C on the workpiece weld. The path planning module of the control system automatically fits the three-point coordinates to generate a smooth and continuous welding trajectory (such as a circular arc or B-spline curve), and associates this trajectory with the called welding process package to save it as the corresponding product's processing program.

[0035] Based on the above structure and control logic, the typical workflow of this embodiment is as follows: the operator completes the quick positioning of the fixture at the first or second station through the zero-point positioning structure and the pneumatic locking structure completes the locking; the welding process package of the target product is called in the control system and the three-point teaching is executed to generate / update the welding path; then the control system drives the horizontal motion module 4, the longitudinal guide rail assembly 5 and the lifting module to work together to make the laser welding head 6 align according to the fitted path and complete the welding; during the welding process, the other station can simultaneously perform loading and unloading and fixture replacement, thereby reducing waiting time and improving equipment utilization.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-station laser welding device, characterized in that, include: Rack (1); The workbench (2) is set on top of the frame (1); A dual-station fixture area (3) is set on the workbench (2), the dual-station fixture area (3) includes a first station and a second station that are spaced apart from each other; A transverse motion module (4) is set on the rear side of the frame (1). A longitudinal guide rail assembly (5) is disposed below the transverse motion module (4) and connected to the transverse motion module (4); A lifting module is installed on the longitudinal guide rail assembly (5); Laser welding head (6) installed at the bottom of the lifting module; The horizontal motion module (4), the longitudinal guide rail assembly (5) and the lifting module constitute a three-axis motion mechanism, enabling the laser welding head (6) to move above the workbench (2) and cover the first and second work stations; Furthermore, each station of the dual-station fixture area (3) is provided with a station base (21) and a fixture assembly (35) mounted on the station base (21).

2. The dual-station laser welding equipment according to claim 1, characterized in that, Each fixture assembly (35) at each workstation is equipped with a pneumatic drive assembly, which includes a cylinder (31), a piston rod (32), a connector (33), and a swing rod (34). The cylinder (31) is mounted on the workstation base (21), the piston rod (32) extends from the cylinder (31), the connector (33) is located at the end of the piston rod (32) and is hinged to the swing rod (34), and the swing rod (34) is connected to the fixture assembly (35).

3. The dual-station laser welding equipment according to claim 2, characterized in that, The piston rod (32) extends and retracts, causing the connector (33) to swing, thereby causing the swing rod (34) to swing and driving the fixture assembly (35) to move.

4. The dual-station laser welding equipment according to claim 2, characterized in that, The connector (33) is a joint connection structure, and the connector (33) is rotatably connected to the piston rod (32) and the swing rod (34) respectively.

5. The dual-station laser welding equipment according to claim 2, characterized in that, The swing rod (34) is a long rod structure. One end of the swing rod (34) is hinged to the connector (33), and the other end is connected to the fixture assembly (35).

6. The dual-station laser welding equipment according to claim 1, characterized in that, The horizontal motion module (4) is arranged along the left and right directions of the worktable (2), and the longitudinal guide rail assembly (5) is arranged along the front and back directions of the worktable (2).

7. The dual-station laser welding equipment according to claim 1, characterized in that, The laser welding head (6) has a laser welding head extension (7) at its front end.

8. The dual-station laser welding equipment according to claim 1, characterized in that, A handheld operator placement seat (8) is provided on the front side of the frame (1).

9. The dual-station laser welding equipment according to claim 1, characterized in that, The laser welding head (6) is connected to the cable inside the frame (1) via a cable chain.

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