CN219151878U

CN219151878U - Laser processing head

Info

Publication number: CN219151878U
Application number: CN202122611975.6U
Authority: CN
Inventors: 唐晔; 李琪强
Original assignee: Shanghai Bosi Automation Technology Co ltd
Current assignee: Shanghai Bosi Automation Technology Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2023-06-09
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses a laser processing head, and belongs to the technical field of laser processing. The laser beam machining head includes collimation lens, lens cutting device and focusing lens that sets gradually along the optical path of laser beam, and lens cutting device includes: a housing; the rotating assembly is rotationally arranged in the shell and comprises a rotating frame and a lens connected with the rotating frame, the rotating frame rotates along a rotating axis, and the rotating axis is perpendicular to the optical axis of the lens; the fixed end of the driving piece is connected with the shell, and the driving end of the driving piece is in driving connection with the rotating frame so as to drive the rotating frame to rotate along the rotating axis and far away from or close to the optical path of the laser beam, so that the lens is selectively positioned outside or inside the optical path of the laser beam, and the laser processing head is provided with various optical paths. The beneficial effects are that: the focal length of the laser processing head and the diameter of the formed light spot can be changed, so that the laser processing head can cut various types of plates to be cut, and the laser processing head has a wide application range and saves cost.

Description

Laser processing head

Technical Field

The utility model relates to the technical field of laser processing, in particular to a laser processing head.

Background

In laser processing, since the types of the sheet materials to be cut are different, the focal length of the laser processing head and the diameter of the spot formed for cutting the sheet materials to be cut are also different. However, since the diameter of the light spot generated by the current laser processing head cannot be changed, one corresponding laser processing head is required to cut one type of plate to be cut, that is, one more processing head needs one more machine tool, and one machine tool needs more than one hundred thousand, so that two or more machine tools are required to meet the processing conditions to meet the processing of various types of plates to be cut, and the cost is high.

In view of the foregoing, there is a need for a laser processing head that solves the above problems.

Disclosure of Invention

The utility model aims to provide a laser processing head which can change the diameter of a light spot formed by the laser processing head, so that the laser processing head can cut various types of plates to be cut, and has the advantages of wide application range and cost saving.

To achieve the purpose, the utility model adopts the following technical scheme:

a laser processing head comprising a collimating optic, a lens cutting-in device, and a focusing optic disposed in sequence along an optical path of a laser beam, the lens cutting-in device comprising:

a housing;

the rotating assembly is rotationally arranged in the shell and comprises a rotating frame and a lens fixedly arranged on the rotating frame, the rotating frame rotates along a rotating axis, and the rotating axis is perpendicular to the optical axis of the laser processing head;

the fixed end of the driving piece is connected with the shell, the driving end of the driving piece is in driving connection with the rotating frame, so that the rotating frame is driven to rotate along the rotating axis and far away from or close to the optical path of the laser beam, the lens is selectively positioned outside or inside the optical path of the laser beam, the laser processing head is provided with various optical paths, and the rotating axis is coaxial with the axis of the output shaft of the driving piece.

Further, the driving member is a motor.

Further, the laser processing head comprises at least one of the lens cutting means.

Further, the lens has two states of an in-cut state and an out-cut state, and when the lens is in the in-cut state, the lens is positioned in the optical path of the laser beam; when the lens is in the cut-out state, the lens is positioned outside the optical path of the laser beam.

Further, the lens incising device further includes:

and one end of the connecting frame is in sealing connection with the shell, and the other end of the connecting frame is fixedly connected with the fixed end of the driving piece.

Further, the rotating frame is formed with a mounting portion for mounting the lens and a protruding portion, the protruding portion extends in a direction close to the driving piece, the axis of the mounting portion, the axis of the protruding portion and the axis of the output shaft are coaxial, the mounting portion is located in the housing, the protruding portion is located in the connecting frame, and the output shaft is in driving connection with the protruding portion.

Further, a bearing is arranged on the connecting frame, and the protruding part is rotatably arranged in the bearing.

Further, a first sealing member is arranged between the connecting frame and the shell, and a second sealing member is arranged between the connecting frame and the protruding portion.

Further, the driving member is mounted to the connection frame through a mounting plate.

The beneficial effects of the utility model are as follows:

the fixed end of the driving piece is connected with the shell, the driving end of the driving piece is in driving connection with the rotating frame of the rotating assembly, and a lens is fixedly arranged on the rotating frame; the driving piece can drive the rotating frame to rotate along the rotating axis and far away from or close to the optical path of the laser beam, so that the lens can be selectively positioned outside the optical path of the laser beam or inside the optical path of the laser beam, the laser processing head can form various optical paths, the laser beam can selectively pass through the collimating lens without passing through or through the lens, the laser beam enters the focusing lens in different optical paths, and the laser beam can form mutually parallel beams after passing through the collimating lens, and the lens can change the distance between two side edges of the formed mutually parallel beams, so that the diameter of a spot for cutting a plate to be cut, which is formed after the mutually parallel beams pass through the focusing lens, is changed, and the formed spots with different diameters can be used for cutting different types of plates to be cut; in this way, the different types of plates to be cut can be cut by one laser processing head, so that the application range is larger, that is, the processing of the plates to be cut of multiple types can be satisfied by only one machine tool, and the number of the required machine tools is smaller, so that the cutting cost is lower.

Drawings

FIG. 1 is a schematic diagram of a lens cutting device according to the present utility model;

FIG. 2 is a schematic view of the structure of the laser processing head provided by the utility model under the optical path;

fig. 3 is a schematic structural diagram of the laser processing head under the second optical path.

Reference numerals:

1-a lens cut-in device; 10-a driving member; 101-an output shaft; 11-a housing; 12-lens; 13-a rotating frame; 131-an installation part; 132-a projection; 14-connecting frames; 15-a first seal; 16-a second seal; 17-bearings; 18-mounting plates;

2-collimating optics; 3-focusing lens; 4-laser beam.

Detailed Description

All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.

Any feature disclosed in this specification may be replaced by alternative features serving the same or equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise. Like reference numerals refer to like elements throughout the specification.

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.

At present, the diameter of a light spot generated by a laser processing head cannot be changed, so that one type of plate to be cut needs one corresponding laser processing head to cut the plate, namely one more processing head needs one more machine tool, and one machine tool needs more than one hundred thousand, so that two or more machine tools are needed to meet the processing conditions to meet the processing of various types of plates to be cut, and the cost is high.

In this regard, in the present embodiment, a laser processing head is proposed, and as shown in fig. 1 to 3, the laser processing head includes a collimator lens 2, a lens cutting device 1, and a focusing lens 3 sequentially arranged along an optical path of a laser beam; the lens cutting device 1 comprises a shell 11, a rotating component and a driving piece 10; the rotating assembly is rotatably arranged in the shell 11 and comprises a rotating frame 13 and a lens 12 fixedly arranged on the rotating frame 13, the rotating frame 13 rotates along a rotating axis, and the rotating axis is perpendicular to the optical axis of the laser processing head; the fixed end of the driving member 10 is connected with the housing 11, the driving end of the driving member 10 is in driving connection with the rotating frame 13, the driving member 10 can drive the rotating frame 13 to rotate along the rotation axis and far away from or near to the optical path of the laser beam, so that the lens 12 is selectively positioned outside or inside the optical path of the laser beam, the laser processing head is formed with various optical paths, and the rotation axis is coaxial with the axis of the output shaft 101 of the driving member 10. The optical path of the laser beam is shown by an arrow a in fig. 2 or 3, and the range between the two arrows a is the inside of the optical path of the laser beam and the range outside of the two arrows a is the outside of the optical path of the laser beam.

By connecting the fixed end of the driving member 10 with the housing 11, the driving end of the driving member 10 is in driving connection with the rotating frame 13 of the rotating assembly, and the lens 12 is fixedly arranged on the rotating frame 13; the driving member 10 can drive the rotating frame 13 to rotate along the rotation axis and towards the optical path far away from or near to the laser beam, so that the lens 12 can be selectively located outside the optical path of the laser beam or inside the optical path of the laser beam, so that the laser processing head can form various optical paths, and the laser beam 4 can not pass through or pass through the lens 12 and then enter the focusing lens 3 after passing through the collimating lens 2, as the laser beam 4 can form mutually parallel beams after passing through the collimating lens 2, and the lens 12 can change the distance between two side edges of the formed mutually parallel beams, so as to change the diameter of the light spot formed after the mutually parallel beams pass through the focusing lens 3 for cutting the plate to be cut, so that the formed light spots with different diameters can be used for cutting different types of plate to be cut.

Specifically, the initial position of the lens 12 is set to be located in the optical path of the laser beam, as shown in fig. 2, when the laser beam 4 passes through the collimating lens 2 to form mutually parallel beams, the formed mutually parallel beams pass through the lens 12 and then enter the focusing lens 3; due to the optical characteristics of the lens 12 itself, when the formed mutually parallel light beams pass through the lens 12, the lens 12 can change the distance H between both side edges of the formed mutually parallel light beams, thereby changing the diameter size of the spot for cutting the sheet material to be cut formed after the mutually parallel light beams pass through the focusing lens 3, so that the formed spots of different diameters can be used for cutting different types of sheet materials to be cut.

When the driving member 10 drives the rotating frame 13 to rotate relative to the axis of the output shaft 101 of the driving member 10 to be far away from the optical path of the laser beam, so that the lens 12 is located outside the optical path of the laser beam, as shown in fig. 3, the laser beam 4 can enter the focusing lens 3 after passing through the collimating lens 2 without passing through the lens 12; because the lens 12 is located outside the optical path of the laser beam, the formed parallel beams directly enter the focusing lens 3, and the distance H between the two side edges of the formed parallel beams is not changed, so that the diameters of light spots formed by the laser beam 4 passing through the lens 12 or not passing through the lens 12 are different, the lens 12 can be selectively located in the optical path of the laser beam or not according to the type of the plate to be cut, the diameters of the light spots formed by the laser beam 4 can be matched with the plate to be cut, the application range of the laser processing head is greatly increased, and the universality is better.

Further, the laser processing head comprises at least one lens cutting device 1, and a plurality of lens cutting devices 1 are arranged between the collimating lens 2 and the focusing lens 3 at intervals. By arranging the plurality of lens cutting-in devices 1, the laser beam 4 can selectively pass through one or a plurality of lenses 12, so that the diameter range of formed light spots is larger, more types of plates to be cut can be cut, the application range of the laser processing head is further increased, and the universality is better. In this embodiment, the laser processing head includes a lens cutting device 1, so that the laser processing head is formed with two optical paths, namely an optical path one shown in fig. 2 and an optical path two shown in fig. 3. In other embodiments, the laser processing head may also be made to include two or three lens cutting devices 1, thereby enabling the laser processing head to be formed with a variety of optical paths. The specific number of lens cutting devices 1 to be placed requires a specific type of sheet material to be cut and a specific cutting environment.

Specifically, the driving member 10 is a motor. In this embodiment, the motor is a stepper motor or a servo motor.

The lens 12 has two states, namely an in-state and an out-state, and when the lens 12 is in the in-state, the lens 12 is positioned in the optical path of the laser beam; when the lens 12 is in the cut-out state, the lens 12 is located outside the optical path of the laser beam. In this embodiment, the rotating frame 13 rotates 90 ° away from the optical path of the laser beam relative to the axis of the output shaft 101, so that the lens 12 is in a cut-out state, so as to ensure that the lens 12 is completely located outside the optical path of the laser beam, and the problem that the laser beam 4 still passes through the lens 12 without accessing the lens 12 will not occur. In other embodiments, the turret 13 may be rotated by other degrees relative to the axis of the output shaft 101 away from or toward the optical path of the laser beam, thereby placing the lens 12 in a cut-out state or a cut-in state, and the specific angle of rotation is not particularly limited.

Further, as shown in fig. 1, the lens cutting device 1 further includes a connecting frame 14, one end of the connecting frame 14 is connected with the housing 11 in a sealing manner, and the other end of the connecting frame 14 is fixedly connected with the fixed end of the driving member 10; specifically, the rotating frame 13 is formed with a mounting portion 131 for mounting the lens 12 and a protruding portion 132, the protruding portion 132 extends in a direction approaching the driving member 10, and an axis of the mounting portion 131, an axis of the protruding portion 132 and an axis of the output shaft 101 are coaxial, the mounting portion 131 is located in the housing 11, the protruding portion 132 is located in the connecting frame 14, and the output shaft 101 is in driving connection with the protruding portion 132; the output shaft 101 of the driving member 10 rotates to drive the protrusion 132 to rotate to drive the mounting portion 131 to rotate, thereby driving the lens 12 on the mounting portion 131 to rotate.

Specifically, as shown in fig. 1, a bearing 17 is provided on the connection frame 14, and the protruding portion 132 is rotatably provided in the bearing 17 and is fixed using a bearing 17 nut to enable the protruding portion 132 to rotate with respect to the connection frame 14. Wherein the bearing 17 is mounted on the connection frame 14 and is fixed using a bearing 17 pressing plate.

Further, as shown in fig. 1, a first sealing member 15 is disposed between the connecting frame 14 and the housing 11, and a second sealing member 16 is disposed between the connecting frame 14 and the protruding portion 132, so that the lens 12 can be sealed and disposed in the housing 11 and the connecting frame 14, so as to avoid the influence of the external environment on the optical characteristics of the lens 12, and thus the normal use performance of the lens 12 can be ensured. In this embodiment, the first sealing member 15 is a sealing ring, the second sealing member 16 is an axial sealing member, and the axial sealing member may be an oil seal or a flood seal.

Specifically, as shown in fig. 1, the driving member 10 is mounted on the connecting frame 14 through the mounting plate 18, the mounting plate 18 is fixedly connected with the fixed end of the driving member 10, the mounting plate 18 is fixedly connected to the connecting frame 14, and the output shaft 101 of the driving member 10 is fixedly connected with the protruding portion 132, so that the driving member 10 can drive the protruding portion 132 to rotate.

The specific working procedure of the laser processing head in this embodiment is as follows:

when the lens 12 is required to be used: since the initial position of the lens 12 is set to lie in the optical path of the laser beam, it is not necessary to activate the driving member 10 to rotate the turret 13 and the lens 12 at this time;

as shown in fig. 2, first, the laser beam 4 is passed through the collimator lens 2 to form mutually parallel beams; then, the formed parallel beams pass through the lens 12 and enter the focusing lens 3; finally, the light beam can be focused to form a light spot for cutting the plate to be cut after passing through the focusing lens 3, so that the plate to be cut is cut through the light spot.

Due to the optical characteristics of the lens 12 itself, when the mutually parallel light beams formed after passing through the collimator lens 2 pass through the lens 12, the lens 12 can change the distance H between both side edges of the already formed mutually parallel light beams, thereby changing the diameter size of the spot for cutting the sheet to be cut formed after the mutually parallel light beams pass through the focusing lens 3, so that the formed spot can be used for cutting the sheet to be cut matched thereto.

When the lens 12 is not required:

as shown in fig. 3, first, the driving member 10 is activated to rotate the output shaft 101 of the driving member 10 to drive the protrusion 132 to rotate 90 ° away from the optical path of the laser beam with respect to the axis of the output shaft 101, and the protrusion 132 rotates to drive the mounting portion 131 to rotate the lens 12 90 ° away from the optical path of the laser beam with respect to the axis of the output shaft 101, so that the lens 12 is located outside the optical path of the laser beam; then, the laser beam 4 is passed through the collimator lens 2 to form mutually parallel beams; finally, the formed mutually parallel light beams are focused through a focusing lens 3 to form light spots for cutting the plate to be cut, so that the plate to be cut is cut through the light spots; after the cutting is completed, the output shaft 101 of the driver 10 is rotated to drive the protrusion 132 by 90 ° relative to the axis of the output shaft 101 toward the optical path of the laser beam to rotate the lens 12 back to the initial position for the next cutting use.

Since the laser beam 4 passes through the collimator lens 2 and then directly enters the focusing lens 3 without passing through the lens 12, the distance H between the two side edges of the formed parallel beams is not changed, so that the formed light spot for cutting the plate to be cut can be used for cutting the plate to be cut matched with the formed light spot.

In this embodiment, the position of the lens 12 in the optical path of the laser beam is adjusted to change the diameter of the light spot formed by the laser processing head, so that the laser processing head can be suitable for cutting various types of plates to be cut, and the universality and applicability of the laser processing head are good.

The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.

Claims

1. A laser processing head comprising a collimator lens (2), a lens cutting device (1) and a focusing lens (3) which are arranged in sequence along an optical path of a laser beam, characterized in that the lens cutting device (1) comprises:

a housing (11);

the rotating assembly is rotationally arranged in the shell (11) and comprises a rotating frame (13) and a lens (12) fixedly arranged on the rotating frame (13), the rotating frame (13) rotates along a rotating axis, and the rotating axis is perpendicular to the optical axis of the laser processing head;

the fixed end of the driving piece (10) is connected with the shell (11), the driving end of the driving piece (10) is in driving connection with the rotating frame (13) so as to drive the rotating frame (13) to rotate along the rotating axis and far away from or close to the optical path of the laser beam, so that the lens (12) is selectively positioned outside or inside the optical path of the laser beam, the laser processing head is formed with various optical paths, and the rotating axis is coaxial with the axis of the output shaft (101) of the driving piece (10).

2. A laser processing head according to claim 1, characterized in that the drive member (10) is a motor.

3. A laser processing head according to claim 1, characterized in that it comprises at least one of said lens cutting means (1).

4. The laser processing head according to claim 1, wherein the lens (12) has two states, an in-state and an out-state, the lens (12) being located within the optical path of the laser beam when the lens (12) is in the in-state; when the lens (12) is in the cut-out state, the lens (12) is located outside the optical path of the laser beam.

5. The laser processing head according to any one of claims 1 to 4, wherein the lens cutting device (1) further comprises:

and one end of the connecting frame (14) is in sealing connection with the shell (11), and the other end of the connecting frame is fixedly connected with the fixed end of the driving piece (10).

6. A laser processing head according to claim 5, characterized in that the turret (13) is formed with a mounting portion (131) for mounting the lens (12) and a projection (132), the projection (132) extending in a direction approaching the driving member (10), and the axis of the mounting portion (131), the axis of the projection (132) and the axis of the output shaft (101) being coaxial, the mounting portion (131) being located in the housing (11), the projection (132) being located in the connecting frame (14), and the output shaft (101) being in driving connection with the projection (132).

7. A laser processing head according to claim 6, characterized in that the connecting frame (14) is provided with a bearing (17), the projection (132) being rotatably arranged in the bearing (17).

8. The laser processing head according to claim 6, characterized in that a first seal (15) is provided between the connecting frame (14) and the housing (11), and a second seal (16) is provided between the connecting frame (14) and the projection (132).

9. The laser processing head according to claim 5, characterized in that the driving element (10) is mounted to the connecting frame (14) by means of a mounting plate (18).