Self-adaptive wire filling device and laser welding system

Abstract

The invention provides a self-adaptive wire filling device and a laser welding system, and relates to the technical field of laser welding, the self-adaptive wire filling device comprises a fixed support, a sliding seat, a sliding rod, a spring and a wire feeding support, the fixed support is used for being installed on a laser head, the sliding seat is connected to the fixed support, and the sliding rod is arranged on the sliding seat; the sliding rod is connected to the sliding seat in a sliding mode in the direction perpendicular to the welding working face, one end of the spring is connected to the fixing support, the other end of the spring is used for being connected to the end, away from the welding working face, of the sliding rod, the wire feeding support is connected to the end, away from the spring, of the sliding rod, and a welding wire penetrates through the wire feeding support. Compared with the prior art, the self-adaptive wire filling device has the advantages that on the basis that the structure is simple and cheap, the stable wire feeding characteristic is guaranteed, the stability and high speed of laser wire filling welding can be achieved, and batch production is not affected by the position of a workpiece and the precision of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and in particular to an adaptive wire filling device and a laser welding system. Background Art

[0002] Laser welding with wire is an advanced welding method that uses a laser beam as a heat source and simultaneously supplies filler material (welding wire) to form a weld during the welding process. This technology is widely used in the welding of metal materials, especially in situations where high welding quality and precision are required. The most critical technology of laser welding with wire is to solve the problem of light and wire coupling stability.

[0003] However, when the existing laser wire filling mechanism is mass-produced, due to the design tolerance of the workpiece size, if the workpiece size used by the laser wire filling mechanism during product assembly is smaller than the theoretical size of the workpiece, the welding wire will not be able to contact the welding work surface, and the welding wire will be suspended in the air and irradiated by the laser, resulting in poor weld formation and unstable penetration. Similarly, if the workpiece size used by the laser wire filling mechanism during product assembly is larger than the theoretical size of the workpiece, it is easy to cause the downward pressure of the welding wire on the welding work surface to be too large, which will bend the welding wire and cause unstable wire feeding, and it is impossible to obtain a product with stable formation and penetration.

[0004] In short, the currently available laser wire-filling mechanism products cannot ensure that the position between the wire feeding head of each product and the welding working surface of the workpiece is the same after being installed on the laser head, resulting in the above-mentioned process problems, which will make it difficult to mass-produce the products in actual production. Summary of the invention

[0005] The problem to be solved by the present invention is: how to provide an adaptive wire filling device to solve the technical problem that laser wire filling mechanism products are difficult to mass produce.

[0006] The present invention provides an adaptive wire filling device, comprising: a fixed bracket, a sliding seat, a sliding rod, a spring and a wire feeding bracket, wherein the fixed bracket is used to be installed on a laser head, the sliding seat is connected to the fixed bracket, the sliding rod is slidably connected to the sliding seat along a direction perpendicular to a welding work surface, one end of the spring is connected to the fixed bracket, and the other end is used to be connected to an end of the sliding rod away from the welding work surface, the wire feeding bracket is connected to an end of the sliding rod away from the spring, and the wire feeding bracket is used to thread the welding wire.

[0007] The adaptive wire filling device provided by the present invention has, compared with the prior art, but is not limited to the following beneficial effects:

[0008] The adaptive wire filling device described in the present invention, the slide is connected to the fixed bracket, that is, the slide is fixed relative to the fixed bracket, the slide bar can slide relative to the slide along the direction perpendicular to the welding work surface (vertical direction), the upper end of the spring is connected to the fixed bracket, and the lower end is connected to the slide bar, that is, the spring bears the gravity from the slide bar and the wire feeding bracket connected to the lower end of the slide bar, and the spring plays a role in balancing the gravity of the lower mechanism. Under the action of the spring, the tip of the welding wire can have a certain force on the welding work surface, wherein the magnitude of the force can be between 2 Newtons and 4 Newtons. In this way, when the workpiece size used in the product assembly is smaller than the theoretical size of the workpiece, the welding wire can be automatically adjusted downward according to the size and position of the workpiece under the action of the spring, so that it contacts the welding work surface, avoiding the welding wire from being suspended and irradiated with laser. Similarly, when the workpiece size used in the product assembly is larger than the theoretical size of the workpiece, the welding wire will compress the spring after contacting the welding work surface, and the downward pressure of the welding wire will not be too large under the buffering action of the spring, thereby avoiding bending the welding wire and causing unstable wire feeding. Compared with the prior art, the adaptive wire-filling device of the present invention has a simple structure and is inexpensive, while ensuring stable wire-feeding characteristics, and can achieve stable, high-speed mass production of laser wire-filling welding that is not affected by workpiece position and device accuracy.

[0009] Optionally, the adaptive wire filling device also includes a connecting plate, the first end face of the connecting plate is used to adhere to and be connected to the laser head, and the fixed bracket is adhered to and connected to the second end face of the connecting plate, wherein the second end face and the first end face are two opposite end faces of the connecting plate.

[0010] Optionally, the adaptive wire filling device further comprises a gasket, and the gasket is used to be arranged between the first end surface and the laser head.

[0011] Optionally, the adaptive wire filling device further comprises a floating rod, one end of the floating rod is connected to the sliding rod, and the other end of the floating rod is connected to the wire feeding bracket, and the wire feeding bracket is connected to the sliding rod via the floating rod.

[0012] Optionally, the wire feeding support includes a support body and a conduit, the support body is connected to an end of the floating rod away from the sliding rod, the conduit is obliquely arranged on the support body, and the conduit is used to pass the welding wire.

[0013] Optionally, the adaptive wire filling device further comprises a limit block, the floating rod is provided with a slot along its radial direction, the limit block is arranged on the fixed bracket, and the limit block is used to be engaged with the slot to limit the axial displacement of the floating rod.

[0014] Optionally, the fixed bracket is a shell structure with a hollow interior, and the slide seat, the slide rod and the spring are all arranged in the shell structure. A through hole connected to the interior of the shell structure is opened at one end of the shell structure close to the wire feeding bracket, and one end of the floating rod is used to extend into the shell structure through the through hole and connect with the slide rod.

[0015] Optionally, a window is provided on a side wall of the shell structure, and the limit block is used to extend into the shell structure through the window and be engaged with the slot.

[0016] Optionally, the shell structure includes a bottom plate and a side plate, the window is opened at a position of the side plate close to the bottom plate, a first connecting hole is opened on the bottom plate, and a second connecting hole is opened on the limit block, and the first connecting hole and the second connecting hole are used to be connected by bolts to fix the limit block relative to the bottom plate.

[0017] In addition, the present invention also provides a laser welding system, including a laser head and the adaptive wire filling device as described above.

[0018] Since the technical improvement and technical effect of the laser welding system are the same as those of the adaptive wire filling device, the technical effect of the laser welding system will not be described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of an adaptive wire filling device according to an embodiment of the present invention installed on a laser head;

[0020] Figure 2 for Figure 1 Middle AA section view;

[0021] Figure 3 for Figure 2 A partial enlarged view of point B in the middle.

[0022] Description of reference numerals:

[0023] 1. Fixed bracket; 11. Bottom plate; 111. First connecting hole; 12. Side plate; 2. Sliding seat; 3. Sliding rod; 4. Spring; 5. Wire feeding bracket; 51. Bracket body; 52. Conduit; 6. Connecting plate; 7. Floating rod; 8. Limiting block; 81. Second connecting hole; 100. Laser head; 200. Laser beam; 300. Welding wire. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the description of the present invention, the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “top”, “bottom”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0028] Moreover, the Z axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis (that is, the direction of the arrow of the Z axis) represents the top, and the negative direction of the Z axis (that is, the direction opposite to the positive direction of the Z axis) represents the bottom.

[0029] It should also be noted that the aforementioned Z-axis representation is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] like Figures 1 to 3 As shown, the adaptive wire filling device of an embodiment of the present invention includes: a fixed bracket 1, a slide seat 2, a slide rod 3, a spring 4 and a wire feeding bracket 5, the fixed bracket 1 is used to be installed on the laser head 100, the slide seat 2 is connected to the fixed bracket 1, the slide rod 3 is slidably connected to the slide seat 2 along a direction perpendicular to the welding work surface, one end of the spring 4 is connected to the fixed bracket 1, and the other end is used to be connected to an end of the slide rod 3 away from the welding work surface, the wire feeding bracket 5 is connected to an end of the slide rod 3 away from the spring 4, and the wire feeding bracket 5 is used to thread the welding wire 300.

[0031] In this embodiment, combined with the attached Figure 1 To Attachment Figure 3 As shown, the slide 2 is connected to the fixed bracket 1, that is, the slide 2 is fixed relative to the fixed bracket 1, and the slide rod 3 can be moved along the vertical direction (attached Figure 1 The spring 4 slides relative to the slide 2 (in the Z-axis direction), the upper end of the spring 4 is connected to the fixed bracket 1, and the lower end is connected to the slide bar 3, that is, the spring 4 bears the gravity from the slide bar 3 and the wire feeding bracket 5 connected to the lower end of the slide bar 3, and the spring 4 plays a role in balancing the gravity of the lower mechanism. Under the action of the spring 4, the tip of the welding wire 300 can have a certain force on the welding work surface, wherein the magnitude of the force can be between 2 Newtons and 4 Newtons. In this way, when the workpiece size used in the product assembly is smaller than the theoretical size of the workpiece, the welding wire 300 can be automatically adjusted downward according to the size and position of the workpiece under the action of the spring 4, so that it contacts the welding work surface, and avoids the welding wire 300 from being suspended and irradiated with laser. Similarly, when the workpiece size used in the product assembly is larger than the theoretical size of the workpiece, the welding wire 300 will compress the spring 4 after contacting the welding work surface, and the downward pressure of the welding wire 300 will not be too large under the buffering effect of the spring 4, thereby avoiding bending the welding wire 300 and causing unstable wire feeding. Compared with the prior art, the adaptive wire-filling device of the present invention has a simple structure and is inexpensive, while ensuring stable wire-feeding characteristics, and can achieve stable, high-speed mass production of laser wire-filling welding that is not affected by workpiece position and device accuracy.

[0032] It should be noted that the slide 2 and the slide rod 3 of the adaptive wire filling device can be standard parts, wherein the slide 2 can be a slide with a ball, and the slide rod 3 slides on the slide with a ball to ensure the stability of the wire feeding direction and ensure that the welding wire 300 can be automatically moved up and down (see Appendix Figure 1 The slide 2 and the slide bar 3 can slide in the Z-axis direction, so that the welding wire 300 cannot contact the welding working surface of the workpiece or interfere with the welding working surface of the workpiece due to the change of the assembly position of the workpiece, causing the welding formation to deteriorate. The slide seat 2 and the slide bar 3 can be clearance-matched, and the clearance is less than 0.01mm to ensure that the fluctuation of the deviation of the welding wire relative to the laser center is less than 0.1mm.

[0033] Optionally, the adaptive wire filling device also includes a connecting plate 6, the first end face of the connecting plate 6 is used to adhere to and be connected to the laser head 100, and the fixed bracket 1 is adhered to and connected to the second end face of the connecting plate 6, wherein the second end face and the first end face are two opposite end faces of the connecting plate 6.

[0034] In this embodiment, combined with the attached Figure 1 and attached Figure 2As shown, the fixing bracket 1 can be installed on the laser head 100 through the connecting plate 6. Specifically, a threaded hole can be opened on the connecting plate 6, so that the connecting plate 6 can attach its first end face to the laser head 100 and then be connected to the laser head 100 by bolts. The fixing bracket 1 can be a rectangular shell structure. A threaded hole can be opened on the fixing bracket 1, so that the fixing bracket 1 can attach to the second end face of the connecting plate 6 and then be connected to the connecting plate 6 by bolts.

[0035] Optionally, the adaptive wire filling device further includes a gasket, and the gasket is used to be arranged between the first end surface and the laser head 100 .

[0036] In this embodiment, combined with the attached Figure 1 As shown, a gasket may be provided between the first end face of the connecting plate 6 and the laser head 100. The connecting plate 6 may be connected to the outer shell of the laser head 100 by bolts passing through the gasket. By increasing or decreasing the number of gaskets, the distance of the fixed bracket 1 relative to the laser head 100 may be adjusted, thereby adjusting the distance between the welding wire 300 and the laser beam 200.

[0037] Optionally, the adaptive wire filling device further comprises a floating rod 7, one end of the floating rod 7 is connected to the sliding rod 3, and the other end is connected to the wire feeding bracket 5, and the wire feeding bracket is connected to the sliding rod through the floating rod.

[0038] In this embodiment, combined with the attached Figure 1 As shown, the wire feeding support 5 can be installed at the lower end of the slide bar 3 (attached Figure 1 In the opposite direction of the middle Z axis), specifically, the fixed bracket 1 can be a shell structure with a hollow interior, and the slide seat 2 and the slide rod 3 are arranged in the shell structure. The shell structure is used to protect the slide seat 2 and the slide rod 3 to prevent the relative sliding of the two from being affected by external impurities. In this way, the wire feeding bracket 5 may not be connected to the slide rod 3 due to size limitations, so the connection is achieved through the floating rod 7, and the two ends of the floating rod 7 can be connected and fixed to the slide rod 3 and the wire feeding bracket 5 by bolts respectively.

[0039] Optionally, the wire feeding support 5 includes a support body 51 and a conduit 52, the support body 51 is connected to one end of the floating rod 7 away from the sliding rod 3, and the conduit 52 is obliquely arranged on the support body 51, and the conduit 52 is used to pass the welding wire 300.

[0040] In this embodiment, combined with the attached Figure 1As shown, the wire feeding bracket 5 includes a bracket body 51 and a conduit 52, wherein the upper portion of the bracket body 51 can be connected to the floating rod 7 by bolts, the lower portion of the bracket body 51 is inclined relative to the upper portion toward the direction close to the laser beam 200, and a through hole is opened along the inclined direction, the conduit 52 is penetrated at the through hole, and the welding wire 300 can pass through the center hole of the conduit 52 to ensure the stability and directionality of the welding wire feeding.

[0041] Optionally, the adaptive wire filling device further comprises a limit block 8, the floating rod 7 is provided with a slot along its radial direction, the limit block 8 is arranged on the fixed bracket 1, and the limit block 8 is used to be connected to the slot to limit the axial displacement of the floating rod 7.

[0042] In this embodiment, combined with the attached Figure 2 and attached Figure 3 As shown, the floating rod 7 is provided with a slot along its radial direction. When the pre-welding trajectory needs to be written, the wire feeding bracket 5 can be manually pulled upward to make the welding wire 300 break away from the welding work surface, and then the limit block 8 is clamped on the slot on the floating rod 7 to limit the axial direction of the floating rod 7 (see Figure 1). Figure 1 The limit block 8 can be detachably connected to the fixed bracket 1 by bolts. When the floating rod 7 needs to be limited, it is moved toward the slot to the clamping position, and then fixed relative to the wire feeding bracket 5.

[0043] Optionally, the fixed bracket 1 is a shell structure with a hollow interior, and the slide seat 2, the slide rod 3 and the spring 4 are all arranged in the shell structure. A through hole connected to the interior of the shell structure is opened at one end of the shell structure close to the wire feeding bracket 5, and one end of the floating rod 7 is used to extend into the shell structure through the through hole and connect with the slide rod 3.

[0044] In this embodiment, combined with the attached Figure 2 As shown, in order to prevent the slide seat 2 and the slide rod 3 from being affected by external impurities in relative sliding, the fixing bracket 1 can be designed as a shell structure with a hollow interior, wherein the lower end of the shell structure (attached Figure 2 A through hole communicating with the interior of the shell structure is opened (in the opposite direction of the middle Z axis), and the size of the through hole can be adapted to the size of the floating rod 7, so that the upper end of the floating rod 7 can extend into the shell structure and be connected with the sliding rod 3.

[0045] Optionally, a window is provided on the side wall of the shell structure, and the limiting block 8 is used to extend into the shell structure through the window and be engaged with the slot.

[0046] In this embodiment, combined with the attached Figure 2 and attached Figure 3As shown, a window is provided on the side wall of the shell structure, and the limit block 8 can extend into the shell structure through the window and be engaged with the slot on the floating rod 7.

[0047] Optionally, the shell structure includes a bottom plate 11 and a side plate 12, the window is opened at a position of the side plate 12 close to the bottom plate 11, a first connecting hole 111 is opened on the bottom plate 11, and a second connecting hole 81 is opened on the limit block 8, and the first connecting hole 111 and the second connecting hole 81 are used to be connected by bolts to fix the limit block 8 relative to the bottom plate 11.

[0048] In this embodiment, combined with the attached Figure 2 and attached Figure 3 As shown, the shell structure includes a bottom plate 11 and a side plate 12, and a window is opened at a position where the side plate 12 is close to the bottom plate 11, so that the limit block 8 can be placed on the inner end surface of the bottom plate 11 through the window, and then the limit block 8 can be fixed relative to the bottom plate 11 by passing the bolts through the first connecting hole 111 on the bottom plate 11 and the second connecting hole 81 on the limit block 8 in sequence. In this way, when the limit block 8 is required to limit the floating rod 7, the wire feeding bracket 5 is manually pulled upward to move the floating rod 7 to a position where the slot on it can be engaged with the limit block 8, and then the limit block 8 is pushed into the slot of the floating rod 7. After releasing the hand, the floating rod 7 will not move downward. In order to prevent the limit block 8 from falling out of the slot, the limit block 8 can be fixed to the bottom plate 11 by bolts.

[0049] In other embodiments, two first connecting holes 111 may be provided on the base plate 11 at intervals, and the two first connecting holes 111 correspond to different states of the limit block 8, that is, when the limit block 8 does not need to limit the floating rod 7, the limit block 8 can be connected to one of the first connecting holes 111, and when the limit block 8 is clamped in the slot of the floating rod 7, the limit block 8 can be connected to the other first connecting hole 111.

[0050] In addition, the present invention also provides a laser welding system, including a laser head and the adaptive wire filling device as described above.

[0051] Specifically, the laser welding system may further include a welding wire feeding device, which is used in conjunction with the laser head and the adaptive wire filling device to stably feed the welding wire.

[0052] Since the technical improvement and technical effect of the laser welding system are the same as those of the adaptive wire filling device, the technical effect of the laser welding system will not be described in detail.

[0053] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0054] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An adaptive wire filling device, characterized in that: include: A fixed bracket (1), a slide seat (2), a slide rod (3), a spring (4) and a wire feeding bracket (5), wherein the fixed bracket (1) is used to be installed on a laser head (100), the slide seat (2) is connected to the fixed bracket (1), the slide rod (3) is slidably connected to the slide seat (2) in a direction perpendicular to a welding work surface, one end of the spring (4) is connected to the fixed bracket (1), and the other end is used to be connected to an end of the slide rod (3) away from the welding work surface, the wire feeding bracket (5) is connected to an end of the slide rod (3) away from the spring (4), and the wire feeding bracket (5) is used to thread a welding wire (300).

2. The adaptive wire filling device according to claim 1, characterized in that: It also comprises a connecting plate (6), the first end face of the connecting plate (6) being used for being attached to and connected to the laser head (100), the fixing bracket (1) being attached to and connected to the second end face of the connecting plate (6), wherein the second end face and the first end face are two opposite end faces of the connecting plate (6).

3. The adaptive wire filling device according to claim 2, characterized in that: It also comprises a gasket, which is used to be arranged between the first end surface and the laser head (100).

4. The adaptive wire filling device according to claim 1, characterized in that: It also includes a floating rod (7), one end of which is connected to the sliding rod (3), and the other end of which is connected to the wire feeding bracket (5), and the wire feeding bracket (5) is connected to the sliding rod (3) through the floating rod (7).

5. The adaptive wire filling device according to claim 4, characterized in that: The wire feeding support (5) comprises a support body (51) and a conduit (52), wherein the support body (51) is connected to one end of the floating rod (7) away from the sliding rod (3), and the conduit (52) is obliquely arranged on the support body (51), and the conduit (52) is used for passing the welding wire (300).

6. The adaptive wire filling device according to claim 4, characterized in that: It also includes a limit block (8), the floating rod (7) is provided with a slot along its radial direction, the limit block (8) is arranged on the fixed bracket (1), and the limit block (8) is used to be engaged with the slot to limit the axial displacement of the floating rod (7).

7. The adaptive wire filling device according to claim 6, characterized in that: The fixed bracket (1) is a shell structure with a hollow interior, the slide seat (2), the slide rod (3) and the spring (4) are all arranged in the shell structure, and one end of the shell structure close to the wire feeding bracket (5) is provided with a through hole connected to the interior of the shell structure, and one end of the floating rod (7) is used to extend into the shell structure through the through hole and connect with the slide rod (3).

8. The adaptive wire filling device according to claim 7, characterized in that: A window is provided on the side wall of the shell structure, and the limit block (8) is used to extend into the shell structure through the window and be engaged with the slot.

9. The adaptive wire filling device according to claim 8, characterized in that: The shell structure comprises a bottom plate (11) and a side plate (12); the window is provided at a position of the side plate (12) close to the bottom plate (11); a first connecting hole (111) is provided on the bottom plate (11); a second connecting hole (81) is provided on the limit block (8); the first connecting hole (111) and the second connecting hole (81) are used for connecting by bolts to fix the limit block (8) relative to the bottom plate (11).

10. A laser welding system, characterized in that: It comprises a laser head and an adaptive wire filling device as described in any one of claims 1 to 9.

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