CN212823378U

CN212823378U - Focusing laser head and laser processing equipment

Info

Publication number: CN212823378U
Application number: CN202021550662.3U
Authority: CN
Inventors: 卢琳; 李琪强
Original assignee: Shanghai Bosi Automation Technology Co ltd
Current assignee: Shanghai Bosi Automation Technology Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-03-30
Anticipated expiration: 2030-07-30

Abstract

The utility model discloses a focusing laser head and laser processing equipment belongs to laser processing equipment technical field. The focusing laser head comprises a focusing assembly, wherein the focusing assembly comprises a shell; the voice coil motor comprises a motor rotor and a motor stator, wherein the motor stator is arranged in the shell, the motor rotor is arranged in the motor stator in a penetrating manner and can move relative to the motor stator along a first direction, and the motor rotor is provided with a light through hole for transmitting a laser beam along the first direction; and the lens assembly is arranged in the light through hole, is connected with the motor rotor and adjusts the current introduced into the voice coil motor so as to adjust the moving distance of the motor rotor and the lens assembly along the first direction and adjust the focal depth of the lens assembly. The advantages are that: the focal depth of the lens assembly can be lengthened, so that a to-be-cut piece with thick thickness can be cut, and the cutting speed and the cutting quality are high.

Description

Focusing laser head and laser processing equipment

Technical Field

The utility model relates to a laser beam machining equipment technical field especially relates to a focusing laser head and laser beam machining equipment.

Background

The laser processing is an advanced manufacturing technology, has the advantages of high efficiency, high precision, high quality, energy conservation, environmental protection and capability of realizing flexible processing and superfine processing, and is widely applied to the fields of automobiles, electrical appliances, aerospace, ferrous metallurgy and mechanical manufacturing.

Because the laser can be applied to actual processing only by light path shaping, namely, in the actual laser processing, the laser emitted by the laser cannot be directly used for processing application, and the laser emitted by the laser can be applied to processing only after the laser is subjected to light path shaping by the laser head; the laser can be transmitted in a converging light mode after passing through a focusing lens in the laser head, and the position with the highest laser energy is the focal position, so that in the actual laser processing, the focal position of the laser needs to be placed near metal plates with different thicknesses to be cut, and the optimal cutting effect can be achieved.

The current laser head adopts that servo motor drives the focus lens and removes to the position of the focus of change laser and the focus of laser head (focus is the focus to the distance between the focus lens), so that the thickness that makes the panel of waiting to cut matches with the focus of laser head, and the panel of cutting thickness is thinner promptly needs short focal length, and the panel of cutting thickness is thicker needs long focal length, thereby realizes the optimal cutting effect. However, when the laser head needs to have a larger focal length to cut a thicker plate, the focal length is larger, the focal depth (depth of focus) is longer, and the focal depth is longer, which easily causes energy dispersion of the laser beam.

In view of the above problems, a focusing laser head and a laser processing apparatus are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a focusing laser head can extend the depth of focus lens to make laser beam's cutting speed and cutting quality all higher.

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

a focusing laser head comprising a focusing assembly, the focusing assembly comprising:

a housing;

the voice coil motor comprises a motor rotor and a motor stator, wherein the motor stator is arranged in the shell, the motor rotor is arranged in the motor stator in a penetrating manner and can move relative to the motor stator along a first direction, and the motor rotor is provided with a light through hole for transmitting a laser beam along the first direction; and

the lens assembly is arranged in the light through hole and connected with the motor rotor, and the current which is led into the voice coil motor is adjusted to adjust the moving distance of the motor rotor and the lens assembly in the first direction so as to adjust the focal depth of the lens assembly.

Preferably, the focusing laser head further comprises:

the thickness detection assembly is used for detecting the thickness of the piece to be cut; and

and the thickness detection assembly and the voice coil motor are electrically connected with the controller.

Preferably, be provided with the mounting groove on the inner wall of logical unthreaded hole, the lens subassembly can install in the mounting groove.

Preferably, the lens assembly comprises:

the focusing lens is accommodated in the mounting groove; and

the fixed pressing ring is configured to enable the focusing lens to be abutted against the bottom of the mounting groove and is in interference fit with the mounting groove.

Preferably, a moving distance of the motor mover in the first direction ranges from 0mm to 20 mm.

Preferably, one of the housing and the motor rotor is provided with a slide rail, the other is provided with a slide block, the slide rail extends along the first direction, and the slide block is in sliding fit with the slide rail.

Preferably, the motor rotor is connected with a motor cable, and the motor cable is used for connecting a power supply.

Preferably, the focusing laser head further comprises a collimation assembly disposed at one end of the focusing assembly where the laser beam is incident.

Preferably, the focusing laser head further comprises a nozzle assembly disposed at one end of the focusing assembly, where the laser beam exits.

Another object of the utility model is to provide a laser processing equipment, the focusing laser head that it includes can extend the depth of focus lens to make laser beam's cutting speed and cutting quality all higher.

a laser processing equipment, includes as above-mentioned focusing laser head and laser instrument, the laser instrument is used for sending laser beam extremely focusing laser head.

The utility model has the advantages that:

by arranging the focusing assembly, the focusing assembly comprises a voice coil motor with ultrahigh frequency, and a motor rotor in the voice coil motor can drive a lens assembly which is arranged in the light through hole and connected with the motor rotor to move relative to a motor stator along a first direction; the current led into the voice coil motor is adjusted to adjust the moving distance of a motor rotor and a lens assembly along the first direction, so that the focal length of the focusing laser head and the focal depth of the lens assembly are adjusted, and laser beams have different focal positions; meanwhile, the voice coil motor is a direct drive motor with a special form, the vibration speed is high, the focus of the laser beam can be regarded as a straight line in high-speed movement, namely the focal depth is prolonged, and meanwhile, the energy dispersion of the laser beam can not occur, so that the cutting speed and the cutting quality of the laser are high, and the cutting requirements of a to-be-cut piece with thick cutting thickness and thin cutting thickness can be met; and meanwhile, the lens assembly is arranged in the light through hole and is connected with the motor rotor, so that a light path channel of a laser beam cannot be interfered.

Drawings

Fig. 1 is a schematic structural diagram of a focusing laser head provided by the present invention;

fig. 2 is a cross-sectional view of the focusing laser head provided by the utility model.

Description of reference numerals:

1-a focusing assembly; 11-a housing; 12-a motor cable; 13-a motor mover; 14-a motor stator; 15-a slide block; 16-a slide rail; 17-a connecting plate; 18-fixing a pressing ring; 19-a focusing lens;

2-a locking assembly; 3-a collimating component; 4-a nozzle assembly; 5-laser beam.

Detailed Description

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

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

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the embodiment, a focusing laser head and laser processing equipment comprising the same are provided. The laser processing equipment further comprises a laser (not marked in the figure), the laser is used for emitting a laser beam 5 to the focusing laser head, the focal position of the laser beam 5 is adjusted through the focusing laser head, and the laser beam 5 can be used for cutting a to-be-cut piece with a thin thickness or a thick thickness. In this embodiment, the member to be cut is a metal plate.

Specifically, the focusing laser head includes a focusing assembly 1 for adjusting a focal depth (depth of focus). As shown in fig. 1 and 2, the focusing assembly 1 includes a housing 11, a voice coil motor, and a lens assembly; the voice coil motor comprises a motor rotor 13 and a motor stator 14, the motor stator 14 is installed in the shell 11, the motor rotor 13 penetrates through the motor stator 14 and can move relative to the motor stator 14 along a first direction, and the motor rotor 13 is provided with a light through hole for transmitting the laser beam 5 along the first direction; the lens subassembly sets up in logical unthreaded hole to link to each other with motor active cell 13, adjust the electric current that lets in the voice coil motor, with the displacement distance of adjusting motor active cell 13 and lens subassembly along first direction, with the focus of adjustment focusing laser head (the focus is the distance of the position of 5 focuses of laser beam to the lens subassembly), and the depth of focus of lens subassembly, so that laser beam 5 can cut the multiple of thickness difference and wait to cut the piece. The voice coil motor has ultrahigh frequency, is a special direct drive motor, has excellent performances of high acceleration, high speed, quick response and smooth force characteristic, and can reach the vertical oscillation frequency of 100 HZ. In this embodiment, the moving distance of the motor mover 13 along the first direction ranges from 0mm to 20 mm. Wherein the first direction is indicated by arrow X in fig. 1.

By arranging the focusing assembly 1, wherein the focusing assembly 1 comprises a voice coil motor with ultrahigh frequency, a motor rotor 13 in the voice coil motor can drive a lens assembly which is arranged in a light through hole and connected with the motor rotor 13 to move relative to a motor stator 14 along a first direction so as to adjust the focal length of a focusing laser head and the focal depth of the lens assembly, so that laser beams 5 have different focal positions; the vertical oscillation frequency of the voice coil motor can reach 100HZ, the vibration rate is high, the focus of the laser beam 5 can be regarded as a straight line in high-speed movement, namely the focal depth of the lens assembly is prolonged, and meanwhile, the energy dispersion of the laser beam 5 cannot occur, so that the cutting speed and the cutting quality of the laser beam 5 are high, and a thick and thin workpiece to be cut can be cut; meanwhile, the lens assembly is arranged in the light through hole and connected with the motor rotor 13, so that the light path channel of the laser beam 5 cannot be interfered.

Further, the focusing laser head further comprises a thickness detection assembly and a controller (not shown). The thickness detection assembly and the voice coil motor are electrically connected with the controller; the thickness detection assembly is used for detecting the thickness of the piece to be cut; the controller is connected with motor active cell 13 control, controller and thickness detection subassembly signal connection, and the controller is used for receiving the signal of the thickness of waiting to cut the piece that thickness detection subassembly detected to adjust the electric current that lets in motor active cell 13, with the displacement distance of adjusting motor active cell 13 and lens subassembly along first direction, thereby the depth of focus of adjustment lens subassembly. The controller in this embodiment is a common controller in the prior art, and therefore, the structural composition and the control principle of the controller are not described in detail herein. Through setting up thickness detection subassembly and controller, can realize adjusting the focal position of depth of focus and laser beam 5 according to the thickness of waiting to cut the piece automatically, adjust accurately, simple to use, and labour saving and time saving. In this embodiment, the thickness detection assembly includes a sensor for detecting the thickness of the piece to be cut and transmitting a detected thickness signal to the controller.

Specifically, be provided with the mounting groove (not marking in the figure) on the inner wall that leads to the unthreaded hole, the lens subassembly can be installed in the mounting groove, and optionally, the mounting groove is for setting up in the step groove that leads to the unthreaded hole bottom. As shown in fig. 2, the lens assembly includes a fixed pressing ring 18 and a focusing lens 19, the focusing lens 19 is placed in the step groove, the fixed pressing ring 18 is installed in the step groove and is in interference fit with the step groove, the fixed pressing ring 18 presses the focusing lens 19 against the bottom of the step groove, and the focusing lens 19 is further fixedly installed.

Optionally, the focusing lens 19 is installed by abutting against two fixed pressing rings 18, and the focusing lens 19 is arranged at the top ends of the two fixed pressing rings 18; the problem that the focusing lens 19 is easy to loose from the inner wall of the light through hole in the high-speed oscillation process of the voice coil motor can be avoided by arranging the two fixed pressing rings 18.

Further, as shown in fig. 2, a slide rail 16 is disposed on one of the housing 11 and the motor mover 13, and a slider 15 is disposed on the other, the slide rail 16 extends along the first direction, and the slider 15 is slidably engaged with the slide rail 16 to move the motor mover 13 along the first direction. In this embodiment, a slide rail 16 is fixedly disposed on the housing 11, a slide block 15 is fixedly disposed on the motor mover 13, and during the moving process of the motor mover 13, the slide block 15 slides along the slide rail 16, so that the motor mover 13 moves along the first direction, and the phenomenon of movement deflection of the motor mover 13 is avoided. In other embodiments, the housing 11 may be fixedly provided with a slider 15, and the motor mover 13 may be fixedly provided with a slide rail 16.

Specifically, as shown in fig. 2, the motor mover 13 is connected to the motor cable 12, the motor cable 12 is used for connecting a power supply to energize the voice coil motor, a magnetic field is generated between a coil located on the motor mover 13 and a magnet located on the motor stator 14 after energization, a linear thrust perpendicular to the magnetic field line is generated on the motor mover 13 under the action of the magnetic field, the generated linear thrust can push the motor mover 13 to move along a first direction, so as to drive the focusing lens 19 to move, and the size of the linear thrust is adjusted by adjusting the size of the current flowing in, so that the adjustment of the focal length and the focal depth is realized.

Further, as shown in fig. 2, the focusing laser head further comprises an alignment assembly 3, a locking assembly 2 and a nozzle assembly 4. The locking assembly 2 is arranged at one end of an incident laser beam 5 of the collimation assembly 3, the collimation assembly 3 is arranged at one end of the incident laser beam 5 of the focusing assembly 1, and the nozzle assembly 4 is arranged at one end of an emergent laser beam 5 of the focusing assembly 1; the locking assembly 2 is used for locking a laser beam 5 emitted by a laser, the collimating assembly 3 is used for enabling each beam in the laser beam 5 locked by the locking assembly 2 to be parallel, so that the parallel laser beam 5 enters the focusing assembly 1 to be subjected to focal depth adjustment, and the nozzle assembly 4 is used for enabling the focused laser beam 5 to be emitted to a piece to be cut so as to be cut. The focusing assembly 1 further comprises a connecting plate 17, the connecting plate 17 is arranged at the top end of the shell 11, and the connecting plate 17 is used for connecting the collimating assembly 3 with the shell 11 so that the collimating assembly 3 is connected with the focusing assembly 1. In this embodiment, since the collimating assembly 3, the locking assembly 2, and the nozzle assembly 4 are conventional components of a laser head in the prior art, detailed descriptions of specific structures and working principles thereof are omitted here.

The specific adjustment process of the focusing laser head in this embodiment: first, the motor cable 12 of the voice coil motor is energized; then, the thickness detection assembly detects the thickness of the workpiece to be cut and transmits the thickness to the controller; after receiving the thickness signal transmitted by the thickness detection assembly, the controller analyzes whether the focal depth and the specific adjustment distance need to be adjusted or not, and adjusts the current introduced into the voice coil motor so as to adjust the moving distance of the motor rotor 13 and the focusing lens 19 along the first direction and adjust the focal depth of the focusing lens 19; finally, the laser device emits laser beams 5, the laser beams 5 sequentially pass through the locking assembly 2 and the collimation assembly 3, then pass through a light through hole in the motor rotor 13 to the focusing lens 19, and then are emitted to a workpiece to be cut through the nozzle assembly 4 to be cut; in the whole cutting process, the motor rotor 13 always oscillates back and forth along the first direction, so that the focal depth of the focusing lens 19 can be always kept unchanged in the whole cutting process, and the optimal cutting effect is achieved.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A focusing laser head, includes focusing subassembly (1), its characterized in that, focusing subassembly (1) includes:

a housing (11);

the voice coil motor comprises a motor rotor (13) and a motor stator (14), wherein the motor stator (14) is installed in the shell (11), the motor rotor (13) penetrates through the motor stator (14) and can move relative to the motor stator (14) along a first direction, and the motor rotor (13) is provided with a light through hole for transmitting a laser beam (5) along the first direction; and

the lens assembly is arranged in the light through hole and connected with the motor rotor (13), and the current which is led into the voice coil motor is adjusted to adjust the moving distance of the motor rotor (13) and the lens assembly along the first direction so as to adjust the focal depth of the lens assembly.

2. The focusing laser head of claim 1 further comprising:

3. The focusing laser head of claim 1 wherein the inner wall of the clear aperture is provided with a mounting groove in which the lens assembly can be mounted.

4. The focusing laser head of claim 3 wherein the lens assembly comprises:

the focusing lens (19) is accommodated in the mounting groove; and

a fixed pressing ring (18) is configured to support the focusing lens (19) against the bottom of the mounting groove and is in interference fit with the mounting groove.

5. The focusing laser head of claim 1, characterized in that the motor mover (13) moves a distance in the range of 0mm to 20mm in the first direction.

6. The focusing laser head according to claim 1, characterized in that one of the housing (11) and the motor mover (13) is provided with a slide rail (16) and the other is provided with a slide block (15), the slide rail (16) extends in the first direction, and the slide block (15) is slidably engaged with the slide rail (16).

7. The focusing laser head according to claim 1, characterized in that the motor mover (13) is connected to a motor cable (12), and the motor cable (12) is used for connecting a power supply.

8. The focusing laser head of any one of claims 1 to 7 further comprising a collimation assembly (3) disposed at an end of the focusing assembly (1) at which the laser beam (5) is incident.

9. The focusing laser head of any one of claims 1 to 7 further comprising a nozzle assembly (4) disposed at an end of the focusing assembly (1) from which the laser beam (5) exits.

10. Laser machining apparatus, comprising a focusing laser head according to any one of claims 1-9 and a laser for emitting the laser beam (5) to the focusing laser head.