CN112809168A

CN112809168A - Laser cutting mechanism for groove cutting

Info

Publication number: CN112809168A
Application number: CN202110224904.2A
Authority: CN
Inventors: 路鹏涛; 常勇
Original assignee: Guangdong Hongshi Laser Technology Co Ltd
Current assignee: Guangdong Hongshi Laser Technology Co Ltd
Priority date: 2021-03-01
Filing date: 2021-03-01
Publication date: 2021-05-18

Abstract

The invention relates to the technical field of laser cutting, in particular to a laser cutting mechanism for groove cutting, which comprises a mounting plate, a mounting seat and a laser head, wherein the mounting seat is connected with the mounting plate in a sliding manner, the laser head is arranged on the side surface of the mounting seat far away from the mounting plate, a first swing mechanism for controlling the laser head to swing around a first shaft and a second swing mechanism for controlling the laser head to swing around a second shaft are arranged on the mounting seat, and the first shaft is vertical to the second shaft; the mounting seat is connected with a lifting mechanism, and the lifting mechanism is mounted on the mounting plate. According to the technical scheme, in the process of groove cutting of the laser head on the welding piece, the laser head swings in two directions, and the lifting mechanism can drive the laser head to lift, so that the distance between the transmitting end of the laser head and the welding piece is kept unchanged, and the groove cutting precision of the welding piece by the laser head is improved.

Description

Laser cutting mechanism for groove cutting

Technical Field

The invention relates to the technical field of laser cutting, in particular to a laser cutting mechanism for groove cutting.

Background

The groove refers to a groove with a certain geometric shape, which is processed and assembled at a part to be welded of a weldment and generally comprises an X-shaped groove, a V-shaped groove, a U-shaped groove and the like, and the purpose of forming the groove on the weldment is to obtain a weld joint which is completely welded on the thickness of the weldment.

Publication No. CN111761234A discloses an AB shaft swing groove cutting device, which comprises a base, an A shaft swing mechanism, a B shaft swing mechanism, a support, a cutting head fixing plate and a precision laser head (laser head); the A-axis swinging mechanism and the B-axis swinging mechanism are both composed of a hollow rotary actuator and a connecting flange; the A-axis swing mechanism is connected with the B-axis swing mechanism through a connecting flange; the base is connected to the A-axis swing mechanism; the B-axis swinging mechanism is hinged in the bracket; the cutting head fixing plate is fixedly connected to the side surface of the bracket; the precision laser head is connected on the cutting head fixing plate. The working process of the technical scheme is as follows: the A-axis swing mechanism and the B-axis swing mechanism are connected through a connecting flange, the hollow rotary actuator provides swing angle power for the double axes respectively, precise laser is precisely controlled through a numerical control system, and finally the whole double-axis rotary device is independently or mounted on a machine tool to achieve high-efficiency and high-precision machining of cutting and welding grooves or material counter bores.

However, in the above technical solution, the laser head can only do biaxial swing, and cannot move up and down, so that the distance between the emitting end of the laser head and the weldment changes in the process of groove cutting performed on the weldment by the laser head, and the accuracy of groove cutting performed on the weldment by the laser head is reduced.

Disclosure of Invention

The invention provides a laser cutting mechanism for groove cutting, which aims to improve the groove cutting precision of a welding part by a laser head.

In order to solve the technical problems, the invention adopts the technical scheme that:

a laser cutting mechanism for groove cutting comprises a mounting plate, a mounting seat in sliding connection with the mounting plate, and a laser head arranged on the side face, far away from the mounting plate, of the mounting seat, wherein a first swing mechanism for controlling the laser head to swing around a first shaft and a second swing mechanism for controlling the laser head to swing around a second shaft are arranged on the mounting seat, and the first shaft is perpendicular to the second shaft; and the mounting plate is provided with a lifting mechanism for driving the mounting seat to lift.

The mounting seat is connected with the mounting plate in a sliding manner along the vertical direction, so that the mounting seat can only slide up and down relative to the mounting plate along the vertical direction; in the process of performing groove cutting on the welding piece by the laser cutting mechanism, when the first swing mechanism controls the laser head and the second swing mechanism controls the laser head to swing in two vertical directions, the lifting mechanism simultaneously drives the mounting seat and the laser head to ascend or descend, so that the distance between the transmitting end of the laser head and the welding piece is kept unchanged, and the accuracy of performing groove cutting on the welding piece by the laser head is improved.

Furthermore, the lifting mechanism comprises a lifting motor fixed with the mounting plate, a screw rod coaxially and rotatably connected with an output shaft of the lifting motor, and a nut fixed with the mounting seat, and the screw rod is in threaded connection with the nut.

Through adopting above-mentioned technical scheme, when the user starts to promote the motor and control and promote motor corotation or reversal, promote the motor and can drive lead screw corotation or reversal, because the nut is fixed with the mount pad, and nut and lead screw threaded connection for when the lead screw rotates, the nut can't follow the lead screw and rotate together, but reciprocates along the axis of lead screw, thereby makes when the lead screw rotates, the mount pad follows the nut and reciprocates along the axis of lead screw.

Furthermore, the output end of the first swing mechanism is coaxially and rotatably connected with a first rotating shaft seat, and the second swing mechanism is installed on the first rotating shaft seat.

Through adopting above-mentioned technical scheme, when first swing mechanism rotated, first pivot seat rotated of output shaft drive of first swing mechanism to the laser head that drives and be connected with first pivot seat rotates, realizes changing the effect of the transmission angle of the transmitting terminal of laser head.

The second swing mechanism is further fixed on the first shaft seat; the rotation axis of the output end of the second swing mechanism is perpendicular to the rotation axis of the output shaft of the first swing mechanism, the output end of the second swing mechanism is rotatably connected with a connecting plate, and the laser head is fixed to the connecting plate.

By adopting the technical scheme, when the second swing mechanism rotates, the output shaft of the second swing mechanism drives the connecting plate to rotate, so that the laser head fixed with the connecting plate is driven to rotate; the second swing mechanism is fixed on the first rotating shaft seat, so that when the first swing mechanism drives the first rotating shaft seat to rotate, the second swing mechanism rotates along with the first rotating shaft seat; and the rotating axis of the second swing mechanism is perpendicular to the rotating axis of the first swing mechanism, so that the laser head can swing all around, and the groove cutting processing can be smoothly completed by the laser head.

Furthermore, a second rotating shaft seat is arranged on the side face, close to the first rotating shaft seat, of the mounting seat, and the second rotating shaft seat is rotatably connected with the first rotating shaft seat through a bearing.

Through adopting above-mentioned technical scheme, the bearing has reduced first pivot seat for the second pivot seat pivoted in-process and the second pivot seat between the frictional force for first pivot seat rotates more smoothly.

Further, the mount pad with be provided with between the mounting panel along the guide rail of vertical direction extension setting, the mount pad with the mounting panel passes through guide rail sliding connection.

Through adopting above-mentioned technical scheme, because the guide rail extends the setting along vertical direction for the mount pad can only follow vertical direction and reciprocate, thereby makes at lead screw pivoted in-process, and the mount pad can not follow the lead screw and rotate, but reciprocates along the axis of lead screw.

Further, still including being used for depositing the power circuit, gas circuit and the walking line box of oil circuit of laser head, walk the line box with the mounting panel is fixed.

By adopting the technical scheme, the wiring box plays a role in protecting the power circuit, the gas circuit and the oil circuit of the laser head, so that the power circuit, the gas circuit and the oil circuit of the laser head are not easily polluted by the external environment.

Further, still including being used for the confession optic fibre of laser head and the protection hose that gas circuit pipe and water-cooled tube passed, protection hose's one end with the laser head is fixed, protection hose's the other end with it is fixed to walk the line box, walk be provided with on the line box with the spacing ring that the outer peripheral face of protection hose cup jointed.

Through adopting above-mentioned technical scheme, the optic fibre that protection hose can reduce the laser head and the possibility that oil circuit pipe and water circuit pipe were torn apart, and the spacing ring can hold protection hose, makes the structure of two stiff ends of protection hose more stable.

Furthermore, a limiting seat is fixed on the wiring box, and the limiting ring is connected with the limiting seat in a spherical hinge mode.

Through adopting above-mentioned technical scheme, the spacing ring can also make the protection hose follow the swing of laser head and swing when holding the protection hose for the laser head swing is more smooth and easy.

Further, the power line and the oil line pipe of the first swing mechanism and the second swing mechanism penetrate through the drag chain, one end of the drag chain is connected with the wiring box, and the other end of the drag chain is connected with the mounting seat.

Through adopting above-mentioned technical scheme, the tow chain can reduce the power line of first swing mechanism and second swing mechanism and the possibility that the oil circuit pipe was torn apart.

Further, the mounting seat upper cover is equipped with first protection casing, laser head upper portion lid be equipped with the second protection casing that the connecting plate is connected.

By adopting the technical scheme, the first protective cover enables the screw rod not to be easily polluted by the external environment, and the screw rod is not easily damaged due to collision; the second protection casing makes laser head upper portion be difficult for external environment pollution, also makes laser head upper portion be difficult for damaging because of the collision.

Compared with the prior art, the beneficial effects are:

the lifting mechanism can drive the mounting seat and the laser head to move up and down, so that the distance between the transmitting end of the laser head and a weldment is adjustable; in the process of groove cutting processing of the laser head on the welding piece, when the first swing mechanism or the second swing mechanism drives the laser head to swing, the laser head is driven to move up and down, the distance between the transmitting end of the laser head and the welding piece is kept unchanged, and the groove cutting accuracy of the laser head on the welding piece is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of a laser cutting mechanism in an embodiment of the present invention.

Fig. 2 is another angle overall structure diagram of the laser cutting mechanism in the embodiment of the invention.

Fig. 3 is a schematic structural diagram of a laser cutting mechanism in an embodiment of the invention.

Fig. 4 is a schematic view of the installation of the protection hose and the drag chain in the embodiment of the present invention.

FIG. 5 is a diagram of the connection between the lead screw and the lift motor according to the embodiment of the present invention.

Description of reference numerals: 1. mounting a plate; 2. a mounting seat; 21. a first swing mechanism; 22. a second swing mechanism; 23. a first shaft seat; 24. a second spindle base; 25. a connecting plate; 26. a support plate; 27. hinging a shaft; 3. a wiring box; 31. a motor base; 32. a hoisting motor; 33. a screw rod; 34. a nut seat; 341; a nut; 35. a coupling; 36. a limiting ring; 37. a limiting seat; 4. a laser head; 5. a protective hose; 6. a drag chain; 7. a first shield; 8. a second shield.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:

examples

As shown in fig. 1 to 5, the laser cutting mechanism for groove cutting of the present invention comprises an inverted L-shaped mounting plate 1, a mounting base 2, a laser head 4, a wiring box 3, a motor base 31, a lifting motor 32, a lifting speed reducer, and a screw 33; the horizontal segment top of mounting panel 1 is fixed with walking line box 3, and the side and the mount pad 2 sliding connection of horizontal segment are kept away from to the vertical section of mounting panel 1, and laser head 4 sets up in the part that mounting panel 1 was kept away from to mount pad 2. It should be noted that, besides the screw nut structure, other lifting mechanisms such as a rack and pinion, a sprocket chain, a transmission belt, etc. capable of driving the mounting base 2 to lift up and down can be applied to the present invention.

As shown in fig. 1 to 5, the motor base 31 is fixed to the wiring box 3, an output shaft of the hoisting motor 32 is coaxially and rotatably connected to an input shaft of the hoisting speed reducer, and a coupling 35 is connected between the output shaft of the hoisting speed reducer and the screw rod 33, so that the output shaft of the hoisting speed reducer and the screw rod 33 coaxially rotate; the lead screw 33 is screwed with a nut 341, a nut holder 34 is fixed to the outer wall of the nut 341, and the nut 341 holder 34 is fixed to the mount 2, so that when the lead screw 33 rotates, the nut 341 does not rotate together with the lead screw 33 but moves in the axial direction of the lead screw 33.

In order to enable the mounting base 2 to move back and forth along the axial direction of the screw rod 33 along with the nut 341, a guide rail is arranged between the mounting base 2 and the mounting plate 1 and extends along the length direction of the screw rod 33; the guide rail can be fixed on the side surface of the mounting plate 1 close to the mounting seat 2, and also can be fixed on the side surface of the mounting seat 2 close to the mounting plate 1.

As shown in fig. 1 to 4, the mounting base 2 is provided with a first swing mechanism and a second swing mechanism, the first swing mechanism 21 includes a first motor and a first speed reducer, an output shaft of the first motor is coaxially connected with an input shaft of the first speed reducer, and an output shaft of the first speed reducer is coaxially connected with a first spindle seat 23; the second swing mechanism 22 is fixed on the first rotating shaft seat 23, the second swing mechanism 22 comprises a second motor and a second speed reducer, an output shaft of the second motor is coaxially connected with an input shaft of the second speed reducer, an output shaft of the second speed reducer is connected with a connecting plate 25, and the side face, far away from the mounting seat 2, of the connecting plate 25 is fixed with the laser head 4; the axis of the output shaft of the first speed reducer is perpendicular to the axis of the output shaft of the second speed reducer, so that the laser head 4 can swing all around. Specifically, the two ends of the first shaft seat 23 are connected with the supporting plates 26, the supporting plates 26 are rotatably connected with the connecting plate 25, and a space for accommodating the second swing mechanism 22 is formed among the first shaft seat 23, the supporting plates 26 and the connecting plate 25, so that the structure is compact. Wherein, the two ends of the connecting plate 25 are hinged with the two ends of the supporting plate 26, and the hinged part of the connecting plate 25 and the supporting plate 26 is connected with a hinge shaft 27.

As shown in fig. 1 to 4, a second rotating shaft seat 24 is connected to a side surface of the mounting seat 2 close to the first rotating shaft seat 23 through a screw, a cylindrical roller bearing is sleeved on a portion, far away from the mounting seat 2, of the second rotating shaft seat 24, an axis of the cylindrical roller bearing is collinear with a rotating axis of an output shaft of the first speed reducer, a rotating ring is sleeved on an outer peripheral surface of the cylindrical roller bearing, and the rotating ring is connected with the first rotating shaft seat 23 through a screw.

As shown in fig. 1 to 4, the laser cutting mechanism of the present invention further includes a protection hose 5 through which an optical fiber of the laser head 4, an air path pipe and a water cooling pipe pass, one end of the protection hose 5 is fixed to the wiring box 3, and the other end of the protection hose 5 is fixed to the laser head 4; the outer side wall of the wiring box 3 is fixed with a limiting seat, the limiting seat is connected with a limiting ring 36 through a spherical hinge, and the limiting ring 36 is sleeved on the outer peripheral surface of the protection hose 5.

As shown in fig. 1 to 4, the laser cutting mechanism of the present invention further includes a drag chain 6 through which a power line and an oil line pipe of the first swing mechanism 21 and the second swing mechanism 22 pass, one end of the drag chain 6 is fixed to the top of the wire routing box 3, and the other end of the drag chain 6 is fixed to the mounting base 2.

As shown in fig. 4, the mounting base 2 is covered with a first protective cover 7, and the upper part of the laser head 4 is covered with a second protective cover 8 connected with a connecting plate 25.

The working principle of the embodiment of the invention is as follows:

in the process of performing groove cutting processing on a welded part by using the laser cutting mechanism, when the laser head 4 is driven by the first motor or the second motor to swing, the motor 32 is lifted and the laser head 4 is driven to move back and forth along the axis of the screw rod 33, so that the distance between the transmitting end of the laser head 4 and the welded part is kept unchanged.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a laser cutting mechanism for groove cutting which characterized in that: the laser head swinging mechanism comprises a mounting plate (1), a mounting seat (2) which is in sliding connection with the mounting plate (1), and a laser head (4) which is arranged on the side surface of the mounting plate (1) and is far away from the mounting seat (2), wherein a first swinging mechanism (21) which controls the laser head (4) to swing around a first shaft and a second swinging mechanism (22) which controls the laser head (4) to swing around a second shaft are arranged on the mounting seat (2), and the first shaft is vertical to the second shaft; and a lifting mechanism for driving the mounting seat (2) to lift is arranged on the mounting plate (1).

2. The laser cutting mechanism for groove cutting of claim 1, wherein: the lifting mechanism comprises a lifting motor (32) fixed on the mounting plate (1), a screw rod (33) coaxially and rotatably connected with an output shaft of the lifting motor (32), and a nut (341) fixed on the mounting seat (2), wherein the screw rod (33) is in threaded connection with the nut (341).

3. The laser cutting mechanism for groove cutting of claim 1, wherein: the output end of the first swing mechanism (21) is coaxially and rotatably connected with a first rotating shaft seat (23), and the second swing mechanism (22) is installed on the first rotating shaft seat (23).

4. The laser cutting mechanism for groove cutting of claim 1, wherein: the second swing mechanism (22) is fixed on the first rotating shaft seat (23); the axis of rotation of the output of second swing mechanism (22) with the axis of rotation mutually perpendicular of the output of first swing mechanism (21), the output of second swing mechanism (22) rotates and is connected with connecting plate (25), laser head (4) with connecting plate (25) are fixed.

5. The laser cutting mechanism for groove cutting of claim 1, wherein: the side face, close to the first rotating shaft seat (23), of the mounting seat (2) is provided with a second rotating shaft seat (24), and the second rotating shaft seat (24) is rotatably connected with the first rotating shaft seat (23) through a bearing.

6. The laser cutting mechanism for groove cutting of claim 1, wherein: mount pad (2) with be provided with between mounting panel (1) and extend the guide rail that sets up along vertical direction, mount pad (2) with mounting panel (1) passes through guide rail sliding connection.

7. The laser cutting mechanism for groove cutting according to any one of claims 1 to 5, characterized in that: still including being used for depositing walk line box (3) of power circuit, gas circuit and the oil circuit of laser head (4), walk line box (3) with mounting panel (1) is fixed.

8. The laser cutting mechanism for groove cutting of claim 6, wherein: still including being used for the confession optic fibre of laser head (4) and protection hose (5) that gas circuit pipe and water-cooled tube passed, the one end of protection hose (5) with laser head (4) are fixed, the other end of protection hose (5) with it is fixed to walk line box (3), walk be provided with on line box (3) with spacing ring (36) that the outer peripheral face of protection hose (5) cup jointed.

9. The laser cutting mechanism for groove cutting of claim 7, wherein: a limiting seat (37) is fixed on the wiring box (3), and the limiting ring (36) is connected with the limiting seat through a spherical hinge.

10. The laser cutting mechanism for groove cutting of claim 1, wherein: the power line and oil line pipe of the first swing mechanism (21) and the second swing mechanism (22) penetrate through a drag chain (6), one end of the drag chain (6) is connected with the wiring box (3), and the other end of the drag chain (6) is connected with the mounting seat (2).