Portable laser welding machine for inner wall circumferential weld

Abstract

The utility model relates to the technical field of laser welding, in particular to a portable laser welding machine for inner wall circumferential welds, which comprises a support plate, a hollow rotating shaft, a laser light source, a light channel component and a support. After being turned by the light channel assembly, the light is focused on an inner wall circumferential weld of the annular workpiece; a bottom plate is arranged at the lower end of the support, a second vertical through hole corresponding to the hollow rotating shaft is formed in the bottom plate, the annular workpiece is arranged in the second vertical through hole, and a centering mechanism and a clamping mechanism are further connected to the bottom plate. The automatic laser welding device can realize automatic laser welding of circumferential welds on the inner wall of the annular workpiece, can adapt to workpieces with various diameter sizes through the clamping mechanism and the adjustable centering mechanism, is simple and rapid in positioning, and can improve the efficiency of welding small-diameter annular workpieces on large components.

Description

Technical Field

[0001] The utility model relates to a laser welding technology, in particular to a portable laser welding machine for inner wall girth welds. Background Art

[0002] On some engineering components, it is sometimes necessary to weld some circular workpieces with smaller diameters (such as circular mounting seats, circular flanges, etc.). To ensure the welding quality, these circular workpieces with smaller diameters usually require outer wall ring and inner wall ring welds.

[0003] CNC laser welding equipment is currently used to create girth welds on the inner walls of small-diameter annular workpieces. This equipment utilizes a dual-axis welding head to achieve flat circular welds. However, if the workpiece needs to be welded to a large component, which is difficult to move (i.e., cannot be placed on the CNC laser welding equipment), or if the welded component is located in a narrow space that is difficult for the welding arm to access (e.g., inside a box), then existing CNC laser welding equipment is ineffective. Manual welding, on the other hand, results in low welding efficiency and inconsistent weld quality. Utility Model Content

[0004] In response to the problems raised in the background technology, the purpose of the present invention is to propose a portable laser welding machine for inner wall girth welds, which introduces the laser focal point into the narrow inner wall girth weld by introducing a hollow rotation + reflector + focusing mirror combination after laser collimation, and realizes laser welding of the inner wall girth weld by rotating the main shaft at the same time. The present invention adopts an adjustable centering design adapted to the workpiece, and has the advantages of simple operation and high welding precision.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A portable laser welding machine for inner wall ring welds, comprising a support plate, a hollow rotating shaft, a laser light source, an optical channel assembly and a bracket, wherein the support plate is provided with a first vertical through hole, the hollow rotating shaft is passed through the first vertical through hole of the support plate and is rotatably connected to the support plate, the upper end of the hollow rotating shaft is connected to the motor through a transmission mechanism and a reduction mechanism in sequence, the laser light source is fixed above the support plate through an outer shell, and the laser light source is located above the hollow rotating shaft, and the optical channel assembly is connected to the lower end of the hollow rotating shaft; the laser light emitted by the laser light source passes downward into the inner hole of the hollow rotating shaft through a collimating mirror, and is focused on the inner wall ring weld of the annular workpiece after being changed in direction by the optical channel assembly; the upper end of the bracket is connected to the support plate, and the lower end has a bottom plate, the bottom plate is provided with a second vertical through hole corresponding to the hollow rotating shaft, and the annular workpiece is placed in the second vertical through hole, and the bottom plate is also connected to a centering mechanism and a clamping mechanism, the centering mechanism is used to position the axis of the annular workpiece coaxial with the hollow rotating shaft, and the clamping mechanism fixes the annular workpiece on the positioning mechanism.

[0007] The bracket includes a top plate, a side plate and a bottom plate. One end of the top plate is connected to the support plate, and the other end is connected to the upper end of the side plate. The lower end of the side plate is connected to the bottom plate. A guide rail is provided on the bottom plate. The centering mechanism is slidably connected to the guide rail. The clamping mechanism and the centering mechanism are respectively located on both sides of the second vertical through hole in the bottom plate.

[0008] The centering mechanism includes an electric push rod and a V-shaped block. The fixed end of the electric push rod is fixedly connected to the base plate, the driving end of the electric push rod is connected to the V-shaped block, and the V-shaped block is connected to the guide rail on the base plate.

[0009] The clamping mechanism includes a slider, a top screw and a fixed block. The slider is slidably connected to the guide rail on the base plate. One side of the slider relative to the centering mechanism is an arc-shaped clamping surface. A fixed block is provided on the other side of the slider. The fixed block is fixedly connected to the base plate. One end of the top screw passes through the fixed block and is threadedly connected to the fixed block, and the other end of the top screw contacts the slider.

[0010] The optical channel assembly includes a first vertical arm, a horizontal arm, a second vertical arm and a focusing arm. The first vertical arm, the horizontal arm, the second vertical arm and the focusing arm are all hollow square tube structures. The first vertical arm is connected to the lower end of the hollow rotating shaft, one end of the horizontal arm is connected to one side of the lower part of the first vertical arm, the second vertical arm is connected to the other end of the horizontal arm, and the focusing arm is connected to the lower end of the second vertical arm. A first reflector is provided at the lower end of the first vertical arm, a second reflector is provided at the upper end of the second vertical arm, and a third reflector is provided at the connection between the second vertical arm and the focusing arm. A focusing module is provided in the focusing arm, and the optical axis of the focusing module is tilted downward and intersects with the rotation axis of the hollow rotating shaft; the laser emitted by the laser light source passes downward through the collimating mirror and then through the hollow rotating shaft, and is then output through the first reflector, the second reflector, the third reflector and the focusing module in sequence.

[0011] The transmission mechanism includes a driving wheel and a driven wheel. The driven wheel is fixedly sleeved on the upper end of the hollow rotating shaft. The driving wheel is connected to the motor main shaft through a reduction mechanism. The driving wheel and the driven wheel are connected through a transmission belt.

[0012] The upper part of the hollow rotating shaft is provided with a first bearing, and the lower part is provided with a second bearing. The first bearing and the second bearing are both installed in the first vertical through hole in the middle of the support plate. The hollow rotating shaft is connected to the first vertical through hole of the support plate through the first bearing and the second bearing.

[0013] The collimating lens is a transmission collimating lens; the focusing module includes a convex lens.

[0014] A detachable first blocking plate is provided at the lower portion of the first vertical arm, a second blocking plate is provided at the upper portion of the second vertical arm, and a third blocking plate is provided at the lower portion.

[0015] The utility model has the following beneficial effects: the utility model drives the hollow shaft to rotate through the upper motor, and the hollow shaft drives the optical channel component to introduce the laser focal point into the narrow inner wall ring weld. No double-axis linkage is required during welding. Only the hollow shaft needs to be rotated to realize the automatic laser welding of the inner wall ring weld of the circular workpiece. The design of placing the motor on the upper part of the support plate can avoid interference from the external environment to the greatest extent. The utility model solves the problem of adaptive coaxial positioning of the rotating shaft of the whole machine and the annular workpiece through the clamping mechanism and the adjustable centering mechanism. It can adapt to workpieces of various diameters and sizes. The positioning is simple and fast, which can improve the efficiency of welding small-diameter circular workpieces on large components. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is the main view of the present utility model.

[0018] Figure 3 It is a left side view of the present invention.

[0019] Figure 4 It is a top view of the base plate, clamping mechanism and centering mechanism.

[0020] Figure 5 It is a cross-sectional view of the base plate, clamping mechanism and centering mechanism.

[0021] In the figure, 1-support plate, 2-hollow shaft, 3-laser light source, 4-housing, 5-collimating mirror, 6-motor, 7-deceleration mechanism; 8-bracket, 9-annular workpiece, 11-first vertical arm, 12-cross arm, 13-second vertical arm, 14-focusing arm, 15-first reflector, 16-second reflector, 17-third reflector, 18-focusing module, 19-driving wheel, 20-driven wheel, 21-electric push rod, 22-V-block, 23-slider, 24-top screw, 25-fixed block, 81-top plate, 82-side plate, 83-bottom plate. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

[0023] like Figure 1-3As shown, the utility model provides a portable laser welding machine for inner wall girth welds, comprising a support plate 1, a hollow rotating shaft 2, a laser light source 3, an optical channel assembly and a bracket 8, wherein the support plate 1 is provided with a first vertical through hole, the hollow rotating shaft 2 is passed through the first vertical through hole of the support plate 1 and is rotatably connected to the support plate 1, the upper end of the hollow rotating shaft 2 is connected to the motor 6 through a transmission mechanism and a reduction mechanism 7 in sequence, the laser light source 3 is fixed above the support plate 1 through a housing 4, and the laser light source 3 is located above the hollow rotating shaft 2, and the optical channel assembly is connected to the lower end of the hollow rotating shaft 2 end; the laser emitted by the laser light source 3 passes through the collimating lens 5 downward into the inner hole of the hollow rotating shaft 2, and is focused on the inner wall ring weld of the annular workpiece 9 after being changed in direction by the optical channel component; the upper end of the bracket 8 is connected to the support plate 1, and the lower end has a base plate 83, and the base plate 83 is provided with a second vertical through hole corresponding to the hollow rotating shaft 2, and the annular workpiece 9 is placed in the second vertical through hole, and the base plate 83 is also connected to a centering mechanism and a clamping mechanism. The centering mechanism is used to position the axis of the annular workpiece 9 coaxial with the hollow rotating shaft 2, and the clamping mechanism fixes the annular workpiece 9 on the positioning mechanism.

[0024] The bracket 8 includes a top plate 81, a side plate 82 and a bottom plate 83. One end of the top plate 81 is connected to the support plate 1, and the other end is connected to the upper end of the side plate 82. The lower end of the side plate 82 is connected to the bottom plate 83. A guide rail is provided on the bottom plate 83. The centering mechanism is slidably connected to the guide rail. The clamping mechanism and the centering mechanism are respectively located on both sides of the second vertical through hole on the bottom plate 83.

[0025] The centering mechanism includes an electric push rod 21 and a V-shaped block 22. The fixed end of the electric push rod 21 is fixedly connected to the base plate 83, the driving end of the electric push rod 21 is connected to the V-shaped block 22, and the V-shaped block 22 is connected to the guide rail on the base plate 83.

[0026] The clamping mechanism includes a slider 23, a top screw 24 and a fixed block 25. The slider 23 is slidably connected to the guide rail on the base plate 83. One side of the slider 23 relative to the centering mechanism is an arc-shaped clamping surface. A fixed block 25 is provided on the other side of the slider 23. The fixed block 25 is fixedly connected to the base plate 83. One end of the top screw 24 passes through the fixed block 25 and is threadedly connected to the fixed block 25. The other end of the top screw 24 contacts the slider 23.

[0027] When the present invention is in use, the positioning position of the centering mechanism is first calculated according to the diameter of the annular workpiece 9, and then the electric push rod 21 drives the V-block 22 to the positioning position, and then the whole machine is lifted, and the second vertical through hole on the bottom plate 83 is put on the annular workpiece 9 from top to bottom, and then the whole machine is moved so that the two V-shaped surfaces of the V-block 22 fit the outer surface of the annular workpiece 9, and the top screw 24 is tightened. The slider 23 presses the annular workpiece 9 to the two V-shaped surfaces of the V-block 22. At this time, the axis of the annular workpiece 9 is coaxial with the axis of the hollow rotating shaft 2, the laser light source 3 and the motor 6 are turned on, the hollow rotating shaft 2 rotates, and drives the optical channel assembly to rotate. The laser emitted by the laser light source 3 passes through the optical lens group in the optical channel assembly and is focused on the inner wall ring weld of the annular workpiece 9. The inner wall ring weld of the annular workpiece 9 is welded as the optical channel assembly rotates.

[0028] The utility model is suitable for components that cannot be placed in place by large-scale CNC welding equipment. Before welding, the annular workpiece 9 can be spot-welded on the component. The force of the clamping mechanism and the centering mechanism to clamp the annular workpiece 9 does not need to be too large. During welding, the stability requirements during welding can be met by relying on the deadweight of the entire machine and the centering clamping force.

[0029] The optical channel assembly includes a first vertical arm 11, a horizontal arm 12, a second vertical arm 13 and a focusing arm 14. The first vertical arm 11, the horizontal arm 12, the second vertical arm 13 and the focusing arm 14 are all hollow square tubular structures. The first vertical arm 11 is connected to the lower end of the hollow rotating shaft 2, one end of the horizontal arm 12 is connected to one side of the lower part of the first vertical arm 11, the second vertical arm 13 is connected to the other end of the horizontal arm 12, and the focusing arm 14 is connected to the lower end of the second vertical arm 13. A first reflector 15 is provided at the lower end of the first vertical arm 11, a second reflector 16 is provided at the upper end of the second vertical arm 13, and a third reflector 17 is provided at the connection between the second vertical arm 13 and the focusing arm 14. A focusing module 18 is provided in the focusing arm 14, and the optical axis of the focusing module 18 is tilted downward and intersects with the rotation axis of the hollow rotating shaft 2; the laser emitted by the laser light source 3 passes downward through the collimating mirror 5 and then passes through the hollow rotating shaft 2, and is then output through the first reflector 15, the second reflector 16, the third reflector 17 and the focusing module 18 in sequence.

[0030] The transmission mechanism includes a driving wheel 19 and a driven wheel 20. The driven wheel 20 is fixedly sleeved on the upper end of the hollow rotating shaft 2. The driving wheel 19 is connected to the main shaft of the motor 6 through the reduction mechanism 7. The driving wheel 19 and the driven wheel 20 are connected by a transmission belt.

[0031] The hollow shaft 2 is provided with a first bearing on the upper part and a second bearing on the lower part. The first bearing and the second bearing are both installed in the first vertical through hole of the support plate 1. The hollow shaft 2 is connected to the first vertical through hole of the support plate 1 through the first bearing and the second bearing.

[0032] The collimating lens 5 is a transmissive collimating lens; the focusing module 18 includes a convex lens.

[0033] The first vertical arm 11 is provided with a detachable first blocking plate at the bottom, the second vertical arm 13 is provided with a second blocking plate at the top and a third blocking plate at the bottom. These blocking plates are all detachable to facilitate the installation and adjustment of the lens.

[0034] In one embodiment of the present invention, the laser light source 3 in the above structure is fixedly mounted on the upper end of the outer shell 4. The outer shell 4 can be connected to the motor housing, or directly connected downward to the support plate 1. The outer shell 4 also covers the transmission mechanism to obtain a safe and beautiful external structure.

[0035] The laser light source 3 of this invention uses a fiber laser connector to introduce the light source. Both the motor 6 and the electric push rod 21 utilize servo motors for digital control. The mounting structures of the collimator 5, first reflector 15, second reflector 16, third reflector 17, and focusing module 18 in this invention are all based on existing technologies. The third reflector 17 and focusing module 18 both utilize an adjustable deflection angle mounting structure, which will not be further described.

[0036] The parts not described in detail in this utility model are prior art.

Claims

1. A portable laser welding machine for inner wall girth welding, comprising a support plate (1), a hollow rotating shaft (2), a laser light source (3), an optical channel assembly and a bracket (8), characterized in that: The support plate (1) is provided with a first vertical through hole, the hollow rotating shaft (2) is passed through the first vertical through hole of the support plate (1) and is rotatably connected to the support plate (1), the upper end of the hollow rotating shaft (2) is connected to the motor (6) through a transmission mechanism and a reduction mechanism (7) in sequence, the laser light source (3) is fixed above the support plate (1) through a housing (4), and the laser light source (3) is located above the hollow rotating shaft (2), and the optical channel component is connected to the lower end of the hollow rotating shaft (2); the laser light emitted by the laser light source (3) passes through a collimating lens (5) and enters the hollow rotating shaft downward. The inner hole of (2) is focused on the inner wall ring weld of the annular workpiece (9) after being redirected by the optical channel component; the upper end of the bracket (8) is connected to the support plate (1), and the lower end has a bottom plate (83), and the bottom plate (83) is provided with a second vertical through hole corresponding to the hollow rotating shaft (2), and the annular workpiece (9) is placed in the second vertical through hole. The bottom plate (83) is also connected to a centering mechanism and a clamping mechanism, the centering mechanism is used to position the axis of the annular workpiece (9) coaxial with the hollow rotating shaft (2), and the clamping mechanism fixes the annular workpiece (9) on the positioning mechanism.

2. A portable laser welding machine for inner wall girth welds according to claim 1, characterized in that: The bracket (8) includes a top plate (81), a side plate (82) and a bottom plate (83), one end of the top plate (81) is connected to the support plate (1), and the other end is connected to the upper end of the side plate (82), and the lower end of the side plate (82) is connected to the bottom plate (83), and a guide rail is provided on the bottom plate (83), and the centering mechanism is slidably connected to the guide rail, and the clamping mechanism and the centering mechanism are respectively located on both sides of the second vertical through hole on the bottom plate (83).

3. A portable laser welding machine for inner wall girth welds according to claim 2, characterized in that: The centering mechanism comprises an electric push rod (21) and a V-shaped block (22), wherein the fixed end of the electric push rod (21) is fixedly connected to the base plate (83), the driving end of the electric push rod (21) is connected to the V-shaped block (22), and the V-shaped block (22) is connected to the guide rail on the base plate (83).

4. The portable laser welding machine for inner wall girth weld according to claim 2, characterized in that: The clamping mechanism includes a slider (23), a top screw (24) and a fixed block (25), the slider (23) is slidably connected to the guide rail on the base plate (83), one side of the slider (23) relative to the centering mechanism is an arc-shaped clamping surface, the other side of the slider (23) is provided with a fixed block (25), the fixed block (25) is fixedly connected to the base plate (83), one end of the top screw (24) passes through the fixed block (25) and is threadedly connected to the fixed block (25), and the other end of the top screw (24) contacts the slider (23).

5. The portable laser welding machine for inner wall girth weld according to claim 1, characterized in that: The optical channel assembly includes a first vertical arm (11), a horizontal arm (12), a second vertical arm (13) and a focusing arm (14). The first vertical arm (11), the horizontal arm (12), the second vertical arm (13) and the focusing arm (14) are all hollow square tube structures. The first vertical arm (11) is connected to the lower end of the hollow rotating shaft (2), one end of the horizontal arm (12) is connected to one side of the lower part of the first vertical arm (11), the second vertical arm (13) is connected to the other end of the horizontal arm (12), the focusing arm (14) is connected to the lower end of the second vertical arm (13), and the lower end of the first vertical arm (11) is provided with a first reflector ( 15), a second reflector (16) is provided at the upper end of the second vertical arm (13), a third reflector (17) is provided at the connection between the second vertical arm (13) and the focusing arm (14), a focusing module (18) is provided in the focusing arm (14), and the optical axis of the focusing module (18) is tilted downward and intersects with the rotation axis of the hollow rotating shaft (2); the laser light emitted by the laser light source (3) passes downward through the collimating mirror (5) and then passes through the hollow rotating shaft (2), and is then output through the first reflector (15), the second reflector (16), the third reflector (17) and the focusing module (18) in sequence.

6. The portable laser welding machine for inner wall girth weld according to claim 1, characterized in that: The transmission mechanism comprises a driving wheel (19) and a driven wheel (20), wherein the driven wheel (20) is fixedly sleeved on the upper end of the hollow rotating shaft (2), the driving wheel (19) is connected to the main shaft of the motor (6) through a reduction mechanism (7), and the driving wheel (19) and the driven wheel (20) are connected through a transmission belt.

7. The portable laser welding machine for inner wall girth weld according to claim 1, characterized in that: The upper portion of the hollow rotating shaft (2) is sleeved with a first bearing, and the lower portion is sleeved with a second bearing. The first bearing and the second bearing are both installed in the first vertical through hole in the middle of the support plate (1). The hollow rotating shaft (2) is connected to the first vertical through hole of the support plate (1) through the first bearing and the second bearing.

8. The portable laser welding machine for inner wall girth weld according to claim 5, characterized in that: The collimating lens (5) is a transmission collimating lens; the focusing module (18) includes a convex lens.

9. The portable laser welding machine for inner wall girth weld according to claim 5, characterized in that: A detachable first blocking plate is provided at the lower portion of the first vertical arm (11), a second blocking plate is provided at the upper portion of the second vertical arm (13), and a third blocking plate is provided at the lower portion.

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