CN210139140U

CN210139140U - Laser cutting device suitable for cutting metal sheet with film

Info

Publication number: CN210139140U
Application number: CN201920890338.7U
Authority: CN
Inventors: 戴家文; 孙春海
Original assignee: Suzhou Radium Laser Technology Co Ltd
Current assignee: Suzhou Radium Laser Technology Co Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-03-13
Anticipated expiration: 2029-06-13

Abstract

The utility model provides a laser cutting device suitable for take membrane cutting to foil, including laser instrument, beam expanding lens, galvanometer and field lens, the beam expanding lens is the beam expanding lens of 2 multiplying powers, the clear aperture of galvanometer and the field lens is 20mm, the focus of field lens is F420 mm; the laser passes through fiber connection the beam expanding lens, the output light path of beam expanding lens is connected the mirror that shakes, the output light path of mirror that shakes is connected the field lens, the laser beam of laser instrument transmission passes through in proper order the beam expanding lens the mirror that shakes with the field lens is focused on the sheetmetal of waiting to cut. Use the utility model discloses when 300mm cutting range that can satisfy the customer requirement, still guarantee the small-size of laser facula, solve the problem of cutting efficiency and heat altered shape.

Description

Laser cutting device suitable for cutting metal sheet with film

Technical Field

The utility model belongs to the technical field of laser cutting, concretely relates to laser cutting device suitable for take membrane cutting to foil.

Background

The heating sheet is processed by adopting a metal sheet cutting process, and the structure of the heating sheet is that a layer of metal sheet is clamped between two layers of plastic films, and the metal sheet needs to be cut into a required shape so as to be used for heating.

The traditional process adopts an etching mode, a layer of plastic film is attached to a metal sheet, the metal sheet is etched into a required shape and size by using liquid medicine, the liquid medicine does not damage the plastic film, and then another layer of plastic film is attached to sandwich the metal sheet. However, due to the environmental requirements, the etching method is being eliminated and a new process is urgently needed to replace the method.

If the cutting head is used for cutting directly, the cutting head can damage the plastic film below while cutting the metal sheet; since the cutting range of the metal sheet is usually 300mm × 300mm, the cutting range required by the customer cannot be achieved and the metal sheet cannot be cut through uniformly if the ordinary galvanometer cutting is adopted.

In addition, because the thickness of the product is too thin, the thickness of part of the metal sheet is only 0.04mm, and when the laser cutting is carried out, the product can be tilted due to thermal deformation, so that the product deviates from a focal length and cannot be cut off locally, and therefore the product carrier part needs to be designed and modified.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a laser cutting device suitable for take membrane cutting to foil, when reaching the 300mm cutting scope that the customer required, still guarantee the small-size of laser facula, solve the problem of cutting efficiency and heat altered shape.

The utility model provides a following technical scheme:

a laser cutting device suitable for cutting a metal sheet with a film comprises a laser, a beam expander, a galvanometer and a field lens, wherein the beam expander is a two-magnification beam expander, the clear aperture of the galvanometer and the clear aperture of the field lens are both 20mm, and the focal length of the field lens is F420 mm; the laser passes through fiber connection the beam expanding lens, the output light path of beam expanding lens is connected the mirror that shakes, the output light path of mirror that shakes is connected the field lens, the laser beam of laser instrument transmission passes through in proper order the beam expanding lens the mirror that shakes with the field lens is focused on the sheetmetal of waiting to cut.

Preferably, the device further comprises a workpiece carrier, a magnet is mounted on the workpiece carrier, the metal sheet is made of a ferrous material, and the magnet enables the metal sheet to be adsorbed on the workpiece carrier.

Preferably, the magnet is a cylindrical magnet with the diameter range of 5-15 mm, the magnets are embedded in the workpiece carrier, and the magnets are arranged on the workpiece carrier in an array range of 300mm multiplied by 300 mm.

Preferably, the surface of the magnet is flush with the surface of the workpiece carrier.

Preferably, the surface of the magnet is covered with a layer of magnetic aluminum alloy plate, and the metal sheet can be attached to the magnetic aluminum alloy plate.

Preferably, the thickness of the magnetic aluminum alloy plate ranges from 0.5 mm to 1.5 mm.

Preferably, the periphery of the magnetic aluminum alloy plate is fixed on the workpiece carrier through screws.

The utility model has the advantages that: the utility model discloses a focus is F420 mm's field lens to reach customer 300 mm's cutting range requirement, adopt the beam expander lens of two multiplying powers to expand the beam, can change the facula size, optimize the efficiency and the heat effect of cutting, reduced the repeated cutting number of times, improved cutting efficiency, improved the phenomenon of perk because of the heat altered shape, improved cutting accuracy, and can not harm the plastic film below the foil; by adopting the vibrating lens and the field lens with the clear aperture of 20mm, the expanded light beam can pass smoothly, the phenomenon of lacking light in the corner area is avoided, and the effectiveness and the integrity of the cutting range are ensured.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the internal structure of the present invention;

labeled as: 1. a metal foil; 2. a plastic film; 3. a laser; 4. a beam expander; 5. a galvanometer; 6. a field lens; 7. a workpiece carrier; 8. a magnet; 9. a magnetic aluminum alloy sheet.

Detailed Description

The embodiment provides a laser cutting device suitable for cutting a metal sheet strip film, wherein the metal sheet 1 is a ferrous sheet, the bottom of the metal sheet is covered with a plastic film 2, and the metal sheet is used for producing a heating sheet. As shown in fig. 1, the device includes a laser 3, a beam expander 4, a galvanometer 5 and a field lens 6, wherein the beam expander 4 is a two-magnification beam expander, the clear aperture of the galvanometer 5 and the field lens 6 is 20mm, and the focal length of the field lens 6 is F420 mm; the laser 3 is connected with the beam expanding lens 4 through optical fibers, the output light path of the beam expanding lens 4 is connected with the galvanometer 5, the output light path of the galvanometer 5 is connected with the field lens 6, and laser beams emitted by the laser 3 are focused on the metal sheet 1 to be cut through the beam expanding lens 4, the galvanometer 5 and the field lens 6 in sequence.

In the device, in order to meet the cutting range requirement of a client of 300mm × 300mm, a field lens with a focal length of F420mm is selected. However, the field lens 6 has a problem that a laser spot is too large, which causes cutting efficiency to be low, and after repeated cutting, the plastic film 2 on the back surface is damaged and generates a large thermal deformation. Therefore, the problem that the light spot is too large is improved by the beam expander 4 with two multiplying powers in the device, because the beam expanding effect of 1.5 times is not obvious, the improvement on the light spot is not large, the beam diameters of the beam expanders of 2.5 times and 3 times are too large, and no corresponding accessories can be matched. After the laser beam is expanded by the beam expander 4 with two multiplying powers, the light spot focused by the field lens 6 can be smaller, so that the cutting efficiency is improved, the repeated cutting times are reduced, the thermal deformation is reduced, the cutting precision is ensured, and the plastic film on the back is not damaged.

However, the diameter of the expanded laser beam exceeds 16mm, and a common 10mm vibrating lens cannot completely receive the beam and has a light shortage phenomenon. Therefore, the device selects the vibrating mirror 5 with the clear aperture of 20mm, and the speed of the vibrating mirror 5 can reach more than 1000mm/s required by customers.

Meanwhile, the light beam after being expanded cannot meet the requirement of a 16mm light beam through a light hole of a conventional field lens, and particularly, the light beam is obviously deficient in a corner area within the range of 300mm multiplied by 300mm, which is caused by the fact that the size of an upper light hole of the common field lens is too small. Therefore, the device adopts the field lens 6 with the unconventional clear aperture of 20mm, solves the problem of light shortage in the corner area and ensures the cutting effectiveness.

Through the configuration, the cutting range of 300mm multiplied by 300mm required by a client is achieved, meanwhile, the small size of a laser spot is ensured, and the problems of cutting efficiency and thermal deformation are solved.

The device also comprises a workpiece carrier 7, wherein the workpiece carrier 7 is positioned under the field lens 6, a magnet 8 is arranged in the workpiece carrier 7, and the magnet 8 stably adsorbs the metal sheet 1 on the workpiece carrier 7, so that the metal sheet 1 cannot move in the cutting process, and the cutting accuracy is ensured. Specifically, the magnets 8 are cylindrical magnets with the diameter range of 5-15 mm, the preferred diameter is 10mm, the magnets 8 are embedded and fixed in the workpiece carrier 7, and the upper surfaces of the magnets 8 are flush with the surface of the workpiece carrier 7, so that the flatness of the metal sheet 1 is guaranteed; the magnets 8 are arranged on the workpiece carrier 7 in an array range of 300mm × 300mm, and the magnets 8 are arranged in a distributed manner, so that the metal sheet can be always and stably attracted by the magnets 8 in the cutting process.

In order to further improve the thermal deformation problem of the metal sheet, a layer of magnetic aluminum alloy plate 9 covers the surface of the magnet 8, the area of the magnetic aluminum alloy plate 9 is larger than that of the metal sheet 1, the thickness range of the magnetic aluminum alloy plate 9 is 0.5-1.5 mm, the preferable thickness is 1mm, the thinner plate thickness is beneficial to ensuring the magnetic attraction force of the magnet on the metal sheet, the middle part of the magnetic aluminum alloy plate 9 is adsorbed on the magnet 8, the surface of the magnetic aluminum alloy plate is smooth, and the periphery of the magnetic aluminum alloy plate is fixed on the workpiece carrier 7 through screws. The magnetic aluminum alloy plate 9 has good heat-conducting property, and the metal sheet 1 is covered and attached to the surface of the magnetic aluminum alloy plate 9 during cutting, so that the heat dissipation effect of the metal sheet 1 is improved, the thermal deformation of the metal sheet 1 is reduced, and the cutting precision is further improved.

The working process of the device is as follows: the metal sheet 1 with the plastic film 2 at the bottom is placed on a magnetic aluminum alloy plate 9 of a workpiece carrier 7, the metal sheet 1 is adsorbed on the workpiece carrier 7 through a magnet 8, a laser 3 is started, a laser beam emitted by the laser 3 is expanded and collimated through a beam expander 4, reflected by a vibrating lens in a vibrating lens 5 and transmitted to a field lens 6, and the laser beam is focused on the metal sheet 1 through the field lens 6 to cut the metal sheet 1.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser cutting device suitable for cutting a metal sheet with a film is characterized by comprising a laser, a beam expander, a galvanometer and a field lens, wherein the beam expander is a two-magnification beam expander, the clear aperture of the galvanometer and the clear aperture of the field lens are both 20mm, and the focal length of the field lens is F420 mm; the laser is connected with the beam expanding lens through an optical fiber, an output light path of the beam expanding lens is connected with the galvanometer, an output light path of the galvanometer is connected with the field lens, and a laser beam emitted by the laser is focused on a metal sheet to be cut through the beam expanding lens, the galvanometer and the field lens in sequence; still include the work piece carrier, fixed mounting has magnet in the work piece carrier, the foil is for containing iron material, magnet will the foil adsorbs on the work piece carrier.

2. The laser cutting device according to claim 1, wherein the magnets are cylindrical magnets with a diameter ranging from 5mm to 15mm, a plurality of the magnets are embedded in the workpiece carrier, and an array ranging from 300mm to 300mm is arranged on the workpiece carrier.

3. The laser cutting device suitable for cutting a foil strip as claimed in claim 2, wherein the surface of the magnet is flush with the surface of the workpiece carrier.

4. The laser cutting device suitable for cutting a metal sheet with a film as claimed in claim 3, wherein the surface of the magnet is covered with a layer of magnetic aluminum alloy plate, and the metal sheet can be attached to the magnetic aluminum alloy plate.

5. The laser cutting device suitable for cutting the metal sheet with the film as claimed in claim 4, wherein the thickness of the magnetic aluminum alloy plate is in a range of 0.5-1.5 mm.

6. The laser cutting device suitable for cutting a metal sheet with a film as claimed in claim 5, wherein the periphery of the magnetic aluminum alloy plate is fixed on the workpiece carrier by screws.