Double-station laser welding equipment

Abstract

The utility model relates to the technical field of welding, and provides double-station laser welding equipment which comprises two welding stations and a laser assembly used for providing welding laser beams for the welding stations, and the two welding stations are arranged side by side. The equipment further comprises a driving assembly used for driving the laser assembly to move in the direction between the two welding stations, and the laser beams are strip-shaped laser beams. According to the double-station laser welding equipment, the strip-shaped laser beams are matched with the driving assembly to form line scanning laser, welding of a plurality of products to be welded can be achieved only by scanning the line scanning laser once, and the welding efficiency of double-station welding can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a double-station laser welding device. Background Art

[0002] Plastic welding refers to a method of connecting two plastic parts by heating them to melt their contact surfaces at the same time, thereby combining them into a whole. There are three common types of plastic welding: the first is welding technology using an external heat source, such as hot plate welding; the second is welding technology using mechanical motion, such as ultrasonic welding; and the third is welding technology using electromagnetic action, such as laser welding.

[0003] With the development of medical industry technology, higher requirements are placed on welding technology. Traditional heating welding and mechanical welding will cause thermal aging and plastic microparticles to plastics during the contact welding process, which are unacceptable for medical microfluidics. Laser welding has the advantages of non-contact welding, fast speed, and easy control, and is widely used in the field of microfluidics. However, during the laser welding process, the plastics to be welded need to fit closely, otherwise the welding effect will be affected. Common plastics used in microfluidics are injection molded or stamped, and the problem with larger injection molding and stamping is that the plastic flatness is not very good, and deformation and warping will occur, which is an adverse effect on laser welding.

[0004] The existing welding adopts a coating mask plate or a photoresist mask plate to construct the welding track. Such a mask plate is expensive and will greatly increase the cost of the welding equipment.

[0005] In addition, the traditional method of welding along the welding track is too time-consuming, and during the welding process, heat accumulation will cause unstable welding quality. Utility Model Content

[0006] The purpose of the utility model is to provide a double-station laser welding device, which can at least solve some of the defects in the prior art.

[0007] To achieve the above-mentioned purpose, an embodiment of the utility model provides the following technical solution: a dual-station laser welding device, comprising two welding stations and a laser component for providing a welding laser beam to the welding stations, the two welding stations are arranged side by side, the device also includes a driving component for driving the laser component to move in a direction between the two welding stations, and the laser beam is a strip laser beam.

[0008] Furthermore, it also includes a base plate for supporting the product to be welded.

[0009] Furthermore, it also includes a driving structure for driving the base plate to move to the welding station.

[0010] Furthermore, it also includes a monitoring component for monitoring the state during welding.

[0011] Furthermore, the monitoring component includes a viewing angle monitoring module.

[0012] Furthermore, the monitoring component includes a temperature monitoring module.

[0013] Furthermore, the laser assembly is provided with a laser fiber interface, and the optical fiber connected to the laser fiber interface is provided on the optical fiber cable moving assembly.

[0014] Furthermore, each of the welding stations is provided with a welding fixture for clamping the product A and the product B to be welded.

[0015] Furthermore, the welding jig includes a transparent flexible layer for making the product A and the product B to be welded fully fit together.

[0016] Furthermore, the welding jig also includes a mask plate for covering the product A or product B.

[0017] Compared with the prior art, the beneficial effect of the utility model is: a double-station laser welding equipment, by adopting a strip laser beam and a driving component to form a line scanning laser, can achieve the welding of multiple products to be welded with only one scan, which can greatly improve the welding efficiency of double-station welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a mask plate of a welding jig provided in an embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the partial structure of a welding jig provided in an embodiment of the utility model;

[0020] Figure 3 A schematic diagram of a laser welding and pressing device provided in an embodiment of the utility model;

[0021] Figure 4 for Figure 3 Schematic diagram of the main viewing angle;

[0022] Figure 5 A schematic diagram of a double-station laser welding device provided in an embodiment of the utility model;

[0023] Figure 6 A schematic diagram of a monitoring component and a laser component of a double-station laser welding device provided in an embodiment of the utility model;

[0024] In the accompanying drawings: 1-welding fixture; 10-base plate; 11-mask plate; 110-roughened surface; 111-welding surface; 1110-welding track; 12-first transparent flexible layer; 13-second transparent flexible layer; 2-laser welding pressing device; 20-pressed glass; 21-pressure plate; 22-product; 23-load-bearing substrate; 24-driving mechanism; 25-guide plate; 26-manual valve; 27-pressure regulating valve; 3-double-station laser welding equipment; 30-welding station; 31-laser assembly; 310-strip laser beam; 311-laser head; 32-driving assembly; 33-driving structure; 34-visual monitoring module; 35-temperature monitoring module; 36-laser fiber interface; 37-fiber optic cable moving assembly. DETAILED DESCRIPTION

[0025] 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 of 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.

[0026] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the utility model provides a welding fixture, including a base plate 10 for carrying a product 22 to be welded, and also including a mask plate 11 covering the product 22, wherein the mask plate 11 has a roughened surface 110 that is not transparent to laser and a welding surface 111 that is transparent to laser. In this embodiment, by designing a mask plate 11 with a roughened surface 110 and a welding surface 111, the cost can be greatly reduced compared with a conventional mask plate 11. Specifically, the product 22 to be welded is plastic, and the welding is a stacking arrangement of product A and product B, with a welding portion between the two, and product A and product B are welded together by laser. There are some welding requirements during welding, and not all welding portions are welded, so a mask plate 11 is used to achieve this purpose. In the prior art, most of the coated mask plates or photoresist mask plates are used. Both of these mask plates are very expensive. In this embodiment, a roughened surface 110 is cleverly made on the mask plate 11, so that the laser can be prevented from passing through the roughened surface 110 to weld the product 22. In this way, it is only necessary to design the position of the roughened surface 110 to control the welding position. The position of the welding surface 111 on the mask plate 11 can be formed by the roughened surface 110. That is, after the roughened surface 110 is made, the other parts of the mask plate 11 are the welding surfaces 111, and the product 22 can be welded through the laser.

[0027] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the roughened surface 110 is a laser roughened surface. In the present embodiment, the roughened surface 110 is a laser roughened surface, that is, the mask plate 11 is roughened by laser, for example, a femtosecond laser can be used to form the roughened surface. Roughening is to frost the mask plate 11 to form an opaque area, so that the required welding track 1110 can be formed on the welding surface 111. The laser marking depth can be controlled to form the roughened surface 110 inside the mask plate 11, so that the roughened surface 110 and the welding surface 111 can be prevented from being worn, thereby extending the service life of the mask plate 11. Preferably, the mask plate 11 can be made of transparent materials such as quartz glass, which is inexpensive and easy to form the roughened surface 110. Preferably, after the roughened surface 110 of the present embodiment is adopted, the laser can be diffusely reflected to avoid the laser reflection damaging the laser head 311, and the receptor for absorbing the laser is also omitted.

[0028] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the bottom plate 10 is provided with a first transparent flexible layer 12 for padding the product to be welded. In this embodiment, for example, if product A is below product B, then a first transparent flexible layer 12 can be added between product A and the bottom plate 10. Since it is flexible, when product A is uneven, the first transparent flexible layer 12 can fill the uneven part of product A, that is, the deformed and warped part. In this way, when product A and product B are squeezed, the entire width of product A can be affected by the squeezing force. Since product A is plastic, plastic has a certain deformation ability, so that product A and product B can fit more closely and improve the welding quality between the two. In another embodiment, the mask plate 11 has a second transparent flexible layer 13 that can be pressed on the product 22 on the side facing the bottom plate 10. The second transparent flexible layer 13 here is arranged between product B and the mask plate 11, and its function is the same as that of the first transparent flexible layer 12, except that it squeezes product B. When both product A and product B are not flat, the first transparent flexible layer 12 and the second transparent flexible layer 13 can be used at the same time. Preferably, the first transparent flexible layer 12 and the second transparent flexible layer 13 are both silicone layers or other transparent flexible materials in the prior art. Preferably, the hardness of the first transparent flexible layer 12 and the second transparent flexible layer 13 is lower than that of the product 22 to avoid damaging the product 22. In addition, placing the mask plate 11 on the second transparent flexible layer 13 can also protect the mask plate 11 from damage, avoid scratches caused by being placed directly on the equipment, and extend the service life of the mask plate 11.

[0029] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the utility model provides a laser welding and pressing device, which adopts the above-mentioned welding fixture 1. All technical effects of the welding fixture 1 can be reflected in the laser welding and pressing device 2, and will not be repeated here.

[0030] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , and the laser head is a line scanning laser head. In this embodiment, the welding efficiency can be greatly improved by line scanning laser. Traditional welding is performed by welding along a preset track, and the welding process is performed along the preset track, which is too time-consuming. After the above-mentioned mask plate 11 is adopted in this embodiment, the laser beam is first constrained to a strip laser beam 310, and the length of the strip laser beam 310 can cover the width of the mask plate 11, and then the strip laser beam 310 is controlled to move along the length direction of the mask plate 11, so that laser line scanning can be realized, and the efficiency is at least twice that of the traditional welding method. The line scanning laser head here is a hypernym, which may include a laser head 311 and a driving component 32 that drives the laser head to move.

[0031] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , and also includes a pressure regulating component for adjusting the pressure of the mask plate 11 pressed to the bottom plate 10. In this embodiment, the pressure regulating component includes a pressure regulating valve 27, and the pressure regulating valve 27 can be used to adjust the pressure of the mask plate 11 pressed to the bottom plate 10, specifically to adjust the force of pressing the pressing glass 20. The pressing glass 20 is the lower feature of the transparent pressing member. In addition to the pressing glass 20, other existing transparent hard materials can be used. The pressure is adjusted because there will be collapse during laser welding. If the product 22 has a high precision, collapse cannot occur. Therefore, pressure adjustment is required to keep the pressure constant within a certain range during the welding process without too much fluctuation. The pressing glass 20 is pressed by the driving force of the driving mechanism 24. During the pressing welding process, if the pressure is too small, the welding will be loose and a virtual welding will occur. If the pressure is too large, it will cause glue overflow at the welding point and damage the structure of the plastic product. Therefore, the pressure can be adjusted by the pressure regulating valve 27 to achieve a suitable pressure value. Of course, other pressure adjustment methods in the prior art are also feasible, and this embodiment does not limit this. Preferably, a plurality of sensors are used to monitor the height of the pressing glass 20 , so as to know the position of the pressing glass 20 at this time, and determine whether the pressure of the pressing glass 20 needs to be adjusted according to a preset standard.

[0032] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The device also includes a monitoring component for monitoring the welding temperature. In this embodiment, the temperature during the welding process is also one of the more important welding indicators, which can be monitored by the monitoring component. The temperature monitoring module 35 can use an infrared temperature probe. When the temperature does not reach or exceed the preset temperature, an alarm can be displayed on the software to determine that the welding is defective.

[0033] As an optimization solution of the embodiment of the utility model, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The device further includes a pressure plate 21, a load-bearing substrate 23, a guide plate 25 and a manual valve 26. The pressure plate 21 is arranged above the pressing glass 20 and is a component that directly contacts the driving force of the driving mechanism 24. The load-bearing substrate 23 is arranged below the bottom plate 10 and serves as the overall load-bearing. The guide plate 25 can provide guidance, and the manual valve 26 is an emergency valve that can manually operate the start and stop of the device.

[0034] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The embodiment of the utility model provides a double-station laser welding device, including two welding stations 30 and a laser assembly 31 for providing a welding laser beam to the welding stations 30. The two welding stations 30 are arranged side by side. The device also includes a driving assembly 32 for driving the laser assembly 31 to move along the direction between the two welding stations 30. The laser beam is a strip laser beam 310. In this embodiment, by using the strip laser beam 310 in conjunction with the driving assembly 32 to form a line scanning laser, it only takes one scan to achieve the welding of multiple products 22 to be welded, which can greatly improve the welding efficiency of the double-station welding. Specifically, the strip laser beam 310 can be used in conjunction with the driving assembly 32 to achieve line scanning laser, which is specifically introduced in the above embodiment. When the welding trajectory 1110 is set, welding can be achieved by scanning the strip laser, which greatly improves the welding efficiency. In particular, when used in conjunction with double-station welding, the welding of two stations can be quickly achieved. After scanning once, the detection position can be sensed by the sensor and compared with the set position. If the detection position reaches the set position, the welding is completed, and the base plate 10 will be moved out of the welding station 30 to receive the material again. If the detection position is not at the set position, it will be scanned again.

[0035] As an optimization solution of the embodiment of the utility model, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , the device also includes a base plate 10 for carrying the product 22 to be welded. In this embodiment, the base plate 10 is the structure of the above-mentioned welding jig 1. When the welding jig 1 is used in the double-station laser welding equipment 3, the base plate 10 can preferably be a movable component, and the base plate 10 is driven to move by the driving structure 33. Specifically, a linear module can be used to facilitate placing the product 22 on the base plate 10. When designed in this way, the parts of the welding jig 1 except the base plate 10 are fixed structures and do not need to be moved. Of course, the base plate 10 can also be always in the welding station, and loading will be a little troublesome, but loading can still be carried out.

[0036] As an optimization solution of the embodiment of the utility model, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , the device also includes a monitoring component for monitoring the state during welding. Preferably, the monitoring component includes a viewing angle monitoring module. The monitoring component includes a temperature monitoring module 35. Among them, the visual monitoring module 34 can use a camera to monitor the welding state in real time, and the temperature monitoring module 35 can use an infrared temperature measuring probe. Of course, in addition to the camera and the infrared temperature measuring probe, other existing devices can also be used, and this embodiment does not limit this. The monitored temperature can be fed back to the temperature control software, and then the temperature control software determines the laser control software, and then the laser control software adjusts the laser power, and then acts on the product 22, so the temperature can be used as a basis for the increase and decrease of the laser power. The temperature control software and the laser control software here are both existing technologies, and the working principles of the two will not be repeated here. In addition, another purpose of monitoring the temperature is that when the temperature does not reach or exceed the preset temperature, an alarm can be displayed on the software to determine that the welding is a defective product. Preferably, the laser component includes a laser head 311, and the temperature monitoring module 35 and the viewing angle monitoring module 34 can be installed on the laser head 311. The laser head 311 can move in the Z axis and the X axis, and a linear module can be used to achieve movement.

[0037] As an optimization solution of the embodiment of the utility model, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The laser assembly 31 is provided with a laser fiber interface 36, and the optical fiber connected to the laser fiber interface 36 is provided on an optical fiber cable moving assembly 37. In this embodiment, the laser fiber interface 36 is used to facilitate the installation of the optical fiber, and the optical fiber cable moving assembly 37 can change the position of the optical fiber, which is convenient for arranging the optical fiber.

[0038] As an optimization solution of the embodiment of the utility model, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 Each of the welding stations 30 has a welding jig 1 for clamping the product A and the product B to be welded. The welding jig 1 includes a transparent flexible layer for making the product A and the product B to be welded fully fit. The welding jig 1 also includes a mask plate 11 for covering the product A or the product B. In this embodiment, the welding jig 1 and the transparent flexible layer refer to the above embodiment, and will not be repeated here.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-station laser welding device, comprising two welding stations and a laser assembly for providing a welding laser beam to the welding stations, characterized in that: The two welding stations are arranged side by side, and the equipment further comprises a driving assembly for driving the laser assembly to move along a direction between the two welding stations, and the laser beam is a strip-shaped laser beam.

2. A double-station laser welding device as claimed in claim 1, characterized in that: Also included is a base plate for carrying the product to be welded.

3. A double-station laser welding device as claimed in claim 2, characterized in that: The invention also comprises a driving structure for driving the base plate to move to the welding station.

4. A double-station laser welding device as claimed in claim 1, characterized in that: Also included is a monitoring component for monitoring the status during welding.

5. A double-station laser welding device as claimed in claim 4, characterized in that: The monitoring component includes a viewing angle monitoring module.

6. A double-station laser welding device as claimed in claim 4, characterized in that: The monitoring component includes a temperature monitoring module.

7. A double-station laser welding device as claimed in claim 1, characterized in that: The laser component is provided with a laser optical fiber interface, and the optical fiber connected to the laser optical fiber interface is arranged on the optical fiber cable moving component.

8. A double-station laser welding device as claimed in claim 1, characterized in that: Each of the welding stations is provided with a welding fixture for clamping the product A and the product B to be welded.

9. A double-station laser welding device as claimed in claim 8, characterized in that: The welding jig comprises a transparent flexible layer for making the product A and the product B to be welded fully fit together.

10. A double-station laser welding device as claimed in claim 8, characterized in that: The welding jig also includes a mask plate for covering the product A or the product B.

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