Laser focusing structure and laser processing equipment

Abstract

The utility model provides a laser focusing structure and laser processing equipment. The laser focusing structure comprises a shell, a first magnetic part, a first lens and a coil, an accommodating cavity and a light outlet communicated with the accommodating cavity are formed in the shell; the first magnetic piece is arranged in the containing cavity and can slide relative to the containing cavity, and the first magnetic piece is provided with a first light through hole; the first lens is fixed to the first light-transmitting hole of the first magnetic part, and laser can penetrate through the first lens and is emitted from the first light-transmitting hole to the light outlet. When the coil is powered on, a magnetic field can be generated to drive the first magnetic part to slide in the containing cavity along the optical axis of the first lens, the first lens is driven to move along with the first magnetic part, the focal length of the laser focusing structure is adjusted, and then the spot position of output laser is adjusted. Different processing effects can be achieved through the same laser focusing structure, and / or processing materials with different thicknesses can be compatible.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser processing technical field, especially a kind of laser focusing structure and laser processing equipment. BACKGROUND

[0002] Laser processing equipment using laser as medium to process is increasingly popular, such as laser engraving machine, laser marking machine and laser cutting etc.Laser processing equipment.In practical application, laser focus needs to be made to fall on processing material to achieve better processing effect.

[0003] In related art, the position of laser focus of laser processing equipment is fixed, but there may be different thickness of processing material, or curved surface processing material, etc., different laser processing head needs to be prepared or additional accessories needs to be added, which is more troublesome and high in cost. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of laser focusing structure and laser processing equipment, its focal length can be adjusted, and then the light spot position of output laser is adjusted, to achieve different processing effect by same laser focusing structure and / or compatible multiple different thickness of processing material.

[0005] To solve the above technical problem, the utility model adopts the following technical scheme:

[0006] According to one aspect of the utility model, the utility model provides a kind of laser focusing structure, for laser processing equipment, the laser focusing structure includes shell, first magnetic piece, first lens and coil;Shell is formed with accommodating cavity and with the light outlet of accommodating cavity communication;First magnetic piece is in the accommodating cavity and can slide relative to the accommodating cavity, and the first magnetic piece has first light hole;First lens is fixed in the first light hole of first magnetic piece, and laser can pass through the first lens and emit from the first light hole towards light outlet;Coil is arranged in the shell, and the center line of the coil is parallel to the optical axis of the first lens, and the coil can generate magnetic field when energized, to drive the first magnetic piece to slide along the optical axis of the first lens in the accommodating cavity.

[0007] In some embodiments of the present application, the laser focusing structure further includes a sliding member, the outer periphery of the sliding member is slidably attached to the side wall of the accommodating cavity, the sliding member is provided with a second light hole, the first magnetic piece is arranged on the sliding member, and the center lines of the first light hole and the second light hole coincide.

[0008] In some embodiments of the present application, the housing is provided with a stopper inside the accommodation cavity, the stopper is provided on two sides of the sliding member in the sliding direction, and the two stoppers are used for abutting against two ends of the sliding member during the sliding process of the sliding member to limit the sliding stroke of the sliding member.

[0009] In some embodiments of the present application, the laser focusing structure further comprises two second magnetic members, the two second magnetic members are respectively arranged on the two stoppers, and the second magnetic members are capable of being magnetically attracted to the first magnetic member.

[0010] In some embodiments of the present application, the stopper is provided with an accommodation groove, and the second magnetic member is fixed in the accommodation groove.

[0011] In some embodiments of the present application, the housing comprises an inner housing and an outer housing sleeved outside the inner housing, the accommodation cavity is arranged in the inner housing, and an accommodation space is formed between the inner housing and the outer housing, the coil is sleeved on the inner housing and located in the accommodation space.

[0012] In some embodiments of the present application, the housing comprises an outer housing, a first inner housing and a second inner housing, the outer housing is formed with a first mounting cavity and a second mounting cavity arranged along the optical axis direction of the first lens, the first inner housing and the second inner housing are arranged in the first mounting cavity and the second mounting cavity respectively, the first inner housing is formed with the accommodation cavity, and the second inner housing and the cavity wall of the second mounting cavity form an accommodation space, the coil is sleeved on the second inner housing and located in the accommodation space.

[0013] In some embodiments of the present application, the housing comprises an outer housing, a first inner housing and a second inner housing, the first inner housing is mounted in the outer housing and forms an accommodation space with the outer housing, the second inner housing is mounted in the first inner housing, the second inner housing is formed with the accommodation cavity, and the coil is sleeved on the first inner housing and located in the accommodation space.

[0014] In some embodiments of the present application, the laser focusing structure further comprises a second lens arranged close to the light outlet of the housing, the optical axis of the second lens coincides with that of the first lens, and the second lens is used in cooperation with the first lens to realize focusing of the laser.

[0015] In some embodiments of the present application, the housing is further provided with a wire hole, and the starting end of the coil and / or the ending end of the coil is arranged through the wire hole.

[0016] According to another aspect of the present application, the present application provides a laser processing device, comprising a device body, a laser generator arranged in the device body, and the above laser focusing structure arranged in the emission light path of the laser generator.

[0017] From the above technical solution, the present application has at least the following advantages and positive effects:

[0018] In the present application, the light path of the laser passes through the first lens and the light outlet in sequence, and the laser is focused under the action of the first lens. The focal point of the focused laser passes through the outside of the shell, so as to be used for processing the workpiece outside the shell. When the coil is energized, a magnetic field can be generated to drive the first magnetic member to slide along the optical axis of the first lens in the accommodating cavity, drive the first lens to move with the first magnetic member, thereby the focal length of the laser focusing structure can be adjusted, and the spot position is adjusted, so that different processing effects are achieved through the same laser focusing structure, and / or multiple different thicknesses of processing materials are compatible.

[0019] Other characteristics and advantages of the present application will become apparent from the following detailed description, or will be learned by practice of the present application.

[0020] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0022] Figure 1 is a structural schematic diagram of a laser processing device of some embodiments of the present application.

[0023] Figure 2 is a structural schematic diagram of a first embodiment of the laser focusing structure of the present application.

[0024] Figure 3 is Figure 2 is a cross-sectional schematic diagram of the corresponding laser focusing structure.

[0025] Figure 4 is a cross-sectional schematic diagram of the shell of the first embodiment of the laser focusing structure of the present application.

[0026] Figure 5 is a structural schematic diagram of the inner shell of the first embodiment of the laser focusing structure of the present application.

[0027] Figure 6 is the cross-sectional view of the inner shell of the first embodiment of the laser focusing structure of the utility model.

[0028] Figure 7 is the cross-sectional view of the first shell of the first embodiment of the laser focusing structure of the utility model.

[0029] Figure 8 is the cross-sectional view of the second shell of the first embodiment of the laser focusing structure of the utility model.

[0030] Figure 9 is the enlarged view of A in figure 1. Figure 4

[0031] Figure 10 is the structure schematic view of the sliding assembly of the first embodiment of the laser focusing structure of the utility model.

[0032] Figure 11 is the connection schematic view of the coil on the shell of the first embodiment of the laser focusing structure of the utility model.

[0033] Figure 12 is the cross-sectional view of the second embodiment of the laser focusing structure of the utility model.

[0034] Figure 13 is the cross-sectional view of the third embodiment of the laser focusing structure of the utility model.

[0035] The figure mark is explained as follows: 10, laser focusing structure; 20, laser generator; 30, equipment main body; 100, shell; 110, containing cavity; 120, light outlet; 130, light guide pipe; 140, light guide channel; 150, stop portion; 151, first stop portion; 152, second stop portion; 153, containing groove; 160, inner shell; 161, limiting rib; 162, containing space; 170, shell; 171, first shell; 1711, first end plate; 1712, first enclosing wall; 172, second shell; 1721, second end plate; 1722, second enclosing wall; 1731, clamping hook; 1732, clamping groove; 180, second lens; 190, window mirror; 200, sliding assembly; 210, sliding piece; 211, second light transmission hole; 220, first lens; 230, first magnetic piece; 231, first light transmission hole; 240, second magnetic piece; 300, coil; 310, wire passing hole; 410, first inner shell; 420, second inner shell; 430, shell; 510, first inner shell; 520, second inner shell; 530, shell. DETAILED DESCRIPTION

[0036] ​Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can be implemented in any

[0037] Moreover, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the

[0038] The application will be further described with reference to the drawings and specific examples. It is to be understood that the specific examples described are intended to be illustrative only and are not to be taken in a limiting sense. The scope of the application is to be limited only by the appended claims.

[0039] For the convenience of description and understanding, the direction towards the inside of the device is in, and the direction away from the center of the device is out.

[0040] Figure 1 is a structural schematic view of some embodiments of the laser processing equipment of the utility model. Figure 2 is a structural schematic view of the first embodiment of the laser focusing structure of the utility model. Figure 3 is Figure 2 is a corresponding cross-sectional view of the laser focusing structure.

[0041] Referring to Figures 1 to 3 The application provides a kind of laser processing equipment, including equipment main body 30, setting in equipment main body 30 laser generator 20, and laser focusing structure 10.Laser generator 20 and laser focusing structure 10 are all arranged on equipment main body 30, and laser generator 20 is used to emit laser.Laser focusing structure 10 is located in the emission light path of laser generator 20, and the laser emitted by laser generator 20 is focused and exits after carrying out optical modulation by laser focusing structure 10.The focal length of laser focusing structure 10 can be adjusted, and then the light spot position of output laser is adjusted, to achieve different processing effects by same laser focusing structure 10, and / or compatible with multiple different thicknesses of processing material.

[0042] In some embodiments, the laser focusing structure 10 comprises a shell 100, a sliding assembly 200, and a coil 300. When a workpiece needs to be processed, the workpiece is placed on a processing table outside the shell 100. The sliding assembly 200 is located inside the shell 100, and the sliding assembly 200 is used for laser focusing. The focused laser focal point in the sliding assembly 200 irradiates the workpiece on the processing table to process the workpiece.

[0043] In this embodiment, the coil 300 can drive the sliding assembly 200 to move relative to the shell 100, so that the focal point of the laser can be adjusted. A single processing device can have different processing effects on the same processing material or can process processing materials of different thicknesses.

[0044] The laser focusing structure 10 proposed in this application can be applied to laser marking machines, laser engraving machines, laser cutting machines, laser welding machines and other laser processing equipment by adjusting the position of the outgoing laser focal point to achieve laser marking, laser engraving, laser cutting and laser welding operations.

[0045] Figure 4 It is a cross-sectional view of the shell of the first embodiment of the laser focusing structure.

[0046] Referring to Figures 2 to 4 In the laser focusing structure 10, the shell 100 is used as a base for bearing and mounting. The shell 100 is provided with a receiving cavity 110 inside for accommodating the sliding assembly 200. The sliding assembly 200 is accommodated in the shell 100 to protect the sliding assembly 200 and effectively avoid the sliding assembly 200 from being touched to maintain the precision of the sliding assembly 200.

[0047] The shell 100 is provided with a light outlet 120. The light outlet 120 is provided on the outer side of the shell 100 and penetrates the wall thickness of the shell 100 inwardly, so that the light outlet 120 penetrates to the receiving cavity 110 of the shell 100, and the light outlet 120 and the receiving cavity 110 are in communication. The sliding assembly 200 is located in the receiving cavity 110. The laser propagating in the sliding assembly 200 is emitted from the light outlet 120 of the shell 100. The focal point of the laser is located outside the shell 100 to perform laser processing on the workpiece outside the shell 100.

[0048] The receiving cavity 110 extends along a straight line, and the light outlet 120 is located at one end of the extension direction of the receiving cavity 110. The inner diameter of the receiving cavity 110 is the same in the extension direction of the receiving cavity 110. The sliding assembly 200 is accommodated in the receiving cavity 110 and abuts against the inner peripheral wall of the receiving cavity 110 to be able to slide along the extension direction of the receiving cavity 110. The receiving cavity 110 not only plays a role in protecting the sliding assembly 200, but also plays a guiding role.

[0049] In the embodiment, the light guide pipe 130 is arranged on the side of the shell 100 opposite to the light outlet 120, and a light guide channel 140 for laser light is arranged in the light guide pipe 130. The light guide channel 140 penetrates the shell 100 and is in communication with the accommodating cavity 110. The laser light emitted by the laser generator 20 enters the sliding assembly 200 in the accommodating cavity after being guided by the light guide channel 140.

[0050] In one embodiment, the light guide pipe 130 and the light outlet 120 are respectively arranged at opposite ends of the accommodating cavity 110. The outlet of the light guide pipe 130 is opposite to the light outlet 120.

[0051] In some embodiments, the light guide channel 140 extends in a straight line, and the axis of the light guide channel 140 passes through the light outlet 120. Further, the axis of the light guide channel 140 coincides with the axis of the light outlet 120.

[0052] In another embodiment, the light guide pipe 130 is a bent tubular structure, and at least one mirror can be arranged in the light guide channel 140 to change the propagation route of the laser light. The laser light emitted by the laser generator 20 propagates in the bent light guide channel 140 by using the mirror.

[0053] In some embodiments, the light outlet 120 is arranged at one end of the accommodating cavity 110 in the axial direction, and the light guide pipe 130 is arranged in the radial direction of the accommodating cavity 110 of the shell 100. A mirror is arranged in the accommodating cavity 110 to change the propagation route of the laser light in the accommodating cavity 110, so that the laser light in the accommodating cavity 110 can pass through the sliding assembly 200 and the light outlet 120 in sequence.

[0054] In the present application, the shell 100 forms an accommodating cavity 110, and the shell 100 is provided with a light inlet and a light outlet 120. The light inlet and the light outlet are respectively arranged on opposite sides of the shell, and the light inlet and the light outlet 120 are respectively in communication with the accommodating cavity 110. Laser light can enter the accommodating cavity 110 from the light inlet and can be emitted from the light outlet 120. The light guide pipe is arranged outside the shell and is in communication with the light inlet.

[0055] In some embodiments, the shell 100 is not provided with a light guide pipe 130, and a light inlet is arranged on the side of the shell 100 opposite to the light outlet 120. The light inlet is in communication with the accommodating cavity 110. The axes of the light inlet and the light outlet 120 coincide, so that the laser light can pass through the light inlet, the accommodating cavity 110 and the light outlet 120 in sequence.

[0056] In the application, the two end stop portions 150 in the accommodating cavity 110 in the shell 100 are respectively arranged at two ends of the sliding assembly 200 in the sliding direction, and the two end stop portions 150 are respectively used for abutting against two ends of the sliding assembly 200 in the sliding process, so as to limit the sliding stroke of the sliding assembly 200.

[0057] In some embodiments, the two end stop portions 150 are respectively arranged in the accommodating cavity 110, the end stop portions 150 protrude from the inner side wall of the accommodating cavity 110, and the end stop portions 150 form a stepped structure in the accommodating cavity 110. The two end stop portions 150 are arranged at two ends of the sliding direction of the sliding assembly 200, so as to limit the sliding stroke of the sliding assembly 200.

[0058] Figure 5 It is a structure schematic view of the inner shell of the first embodiment of the laser focusing structure of the utility model. Figure 6 It is a cross-sectional schematic view of the inner shell of the first embodiment of the laser focusing structure of the utility model.

[0059] Referring to Figures 2 to 6 In the embodiment, the shell 100 includes an inner shell 160 and an outer shell 170 sleeved outside the inner shell 160. The accommodating cavity 110 is arranged in the inner shell 160, and the inner shell 160 is an open structure at least at one end, so that the sliding assembly 200 can extend into the accommodating cavity 110 in the inner shell 160 from the open end of the inner shell 160.

[0060] In the embodiment, the inner shell 160 is an open structure at one end, and the light outlet 120 is arranged on the closed end of the inner shell 160. The outer shell 170 is arranged at the open end of the inner shell 160, one end stop portion 150 is arranged on the outer shell 170, and the other end stop portion 150 is arranged on the end face of the closed end of the inner shell 160.

[0061] Figure 7 It is a cross-sectional schematic view of the first outer shell of the first embodiment of the laser focusing structure of the utility model. Figure 8 It is a cross-sectional schematic view of the second outer shell of the first embodiment of the laser focusing structure of the utility model. Figure 9 It is Figure 4 The enlarged view of A in the figure.

[0062] Referring to Figures 3 to 9 The outer shell 170 includes a first outer shell 171 and a second outer shell 172 which are engaged with each other. The first outer shell 171 and the second outer shell 172 are arranged opposite to each other along the extension direction of the accommodating cavity 110, and the first outer shell 171 and the second outer shell 172 are arranged at two ends of the inner shell 160 in the extension direction of the accommodating cavity 110.

[0063] The first shell 171 comprises a first end plate 1711 and a first enclosing wall 1712 which is bent and extends from the edge of the first end plate 1711. The first enclosing wall 1712 is annular in structure, and the light guide pipe 130 is arranged on the first end plate 1711 of the first shell 171 and penetrates the first end plate 1711.

[0064] The second shell 172 comprises a second end plate 1721 and a second enclosing wall 1722 which is bent and extends from the edge of the second end plate 1721. The second enclosing wall 1722 is annular in structure, and the light outlet 120 penetrates the second end plate 1721.

[0065] The first enclosing wall 1712 of the first shell 171 and the second enclosing wall 1722 of the second shell 172 enclose the outer periphery of the inner shell 160, and the first end plate 1711 of the first shell 171 and the second end plate 1721 of the second shell 172 are respectively located at the two ends of the inner shell 160 in the extension direction of the accommodating cavity 110.

[0066] The opposite ends of the first shell 171 and the second shell 172 are provided with a clamping structure so that the first shell 171 and the second shell 172 are limited. The enclosing walls of the first shell 171 and the second shell 172 are provided with a clamping structure to facilitate the installation and disassembly between the first shell 171 and the second shell 172. The clamping structure is arranged to clamp the inner shell 160 in the outer shell 170.

[0067] The clamping structure comprises a clamping hook 1731 and a clamping groove 1732, and the clamping hook 1731 and the clamping groove 1732 are respectively arranged on the first enclosing part and the second enclosing part. In one embodiment, the clamping hook 1731 is formed on the second shell 172, and the clamping groove 1732 is formed on the first shell 171. In another embodiment, the clamping hook 1731 is formed on the first shell 171, and the clamping groove 1732 is formed on the second shell 172.

[0068] In some embodiments, the light guide pipe 130 is integrally formed on the first shell 171. In another embodiment, the light guide pipe 130 and the first shell 171 are a split structure, and the light guide pipe 130 is fixed on the first shell 171 by fixing or welding.

[0069] In another embodiment, the laser focusing structure 10 can not be provided with the light guide pipe 130, and the laser generator 20 is arranged in the accommodating cavity 110.

[0070] In this embodiment, two stop portions 150 are provided, one stop portion 150 is formed on the side wall of the inner shell 160 provided with the light outlet 120, and the other stop portion 150 is formed on the outer shell 170. Specifically, the other stop portion 150 is formed on the first end plate 1711 of the first shell 171.

[0071] In some embodiments, two stop portions 150 are formed on the inner shell 160, and the inner periphery of the inner shell is protruded to form the stop portions, and the two stop portions 150 are formed on the inner periphery wall of the accommodating cavity 110.

[0072] In another embodiment, the inner shell 160 is a tubular structure with both ends open, and the outer shell 170 covers both ends of the inner shell 160, and the two stop portions 150 are formed on the outer shell 170.

[0073] In this embodiment, the stop portion 150 is provided with an accommodating groove 153, and the accommodating groove 153 is formed on the stop portion 150 to form a stepped structure between the stop portion 150 and the accommodating groove 153.

[0074] In this embodiment, the outer periphery of the inner shell 160 is formed with a protruding limiting rib 161, and the outer end of the limiting rib 161 abuts against the inner periphery wall of the shell 100 to limit the inner shell 160. An accommodating space 162 is formed between the inner side of the outer shell 170 and the outer side of the inner shell 160, which can be used to arrange the coil 300.

[0075] Figure 10 It is a structural schematic view of the sliding assembly of the first embodiment of the laser focusing structure of the utility model.

[0076] Referring to Figures 3 to 10 , the sliding assembly 200 is located in the shell 100, and the sliding assembly 200 can slide in the shell 100. The sliding assembly 200 can include a first magnetic member 230 and a first lens 220. The first lens 220 is arranged on the first magnetic member 230, and the first magnetic member 230 is arranged in the shell and can slide along the optical axis of the first lens 220 relative to the shell.

[0077] The optical axis direction of the first lens 220 is parallel to the extension direction of the accommodating cavity 110. The first magnetic member 230 is arranged in the accommodating cavity 110 and can slide relative to the accommodating cavity 110, so that the first magnetic member 230 can approach and move away from the light outlet 120. The laser entering the accommodating cavity 110 passes through the first lens 220 and can be emitted from the light outlet 120 of the shell 100. The first lens 220 is arranged on the first magnetic member 230 to be movable with the first magnetic member 230. The first magnetic member 230 drives the first lens 220 to move, and drives the first lens 220 to approach or move away from the light outlet 120, so that the focal point of the laser moves to achieve different laser processing effects.

[0078] In some embodiments, the first magnetic member 230 is provided with a first light passing hole 231, and the first lens is arranged in the first light passing hole 231. The first magnetic member 230 is a ring structure, and the first light passing hole 231 is formed in the middle part of the first magnetic member 230. The outer periphery of the first lens 220 is fitted and fixed in the first light passing hole 231 of the first magnetic member 230.

[0079] The first magnetic member 230 is provided with a first light passing hole 231 for laser to pass through, and the light exit end of the first light passing hole 231 is directed towards the light exit opening 120. The first lens 220 is fixed on the first magnetic member 230, and the first lens 220 is located in the first light passing hole 231, so that the laser in the first light passing hole 231 can pass through the first lens 220 and the light exit opening 120 in sequence. The laser passes through the light exit opening 120, and the focal point of the laser is located outside the shell 100 to process the workpiece outside the shell 100.

[0080] In one embodiment, the laser focusing structure 10 focuses the laser through a single first lens 220. The focusing through a single lens can achieve the focusing of the laser.

[0081] In some embodiments, the light exit opening 120 of the shell 100 is provided with a second lens 180, and the axis of the second lens 180 coincides with that of the first lens 220. The combination of the first lens 220 and the second lens 180 can achieve the focusing of the laser. For example, the first lens 220 is a concave lens, which diverges the light rays. The second lens 180 is a convex lens, which focuses the light rays. By changing the position of the first lens 220 relative to the second lens 180, the position of the laser spot passing out of the second lens 180 can be adjusted.

[0082] In other embodiments, the first lens 220 is a convex lens, and the second lens 180 is a concave lens. In still other embodiments, the first lens 220 and the second lens 180 can also be other types of lenses, such as free-form lenses, etc. This is not limited here, as long as the combination of the lenses can achieve focusing.

[0083] The lens can focus the laser light, which can reduce the size of the laser spot formed at the processing position, improve the energy density of the laser spot, and improve the processing efficiency.

[0084] In one embodiment, the laser focusing structure can include a sliding member 210, a first magnetic member 230, and a first lens 220. The sliding member 210 is slidably arranged in the accommodating cavity 110 of the shell 100, so that the sliding member 210 can approach and move away from the light exit opening 120. The first magnetic member 230 is arranged on the sliding member 210, and the first lens 220 is arranged on the sliding member 210 or the first magnetic member 230. The sliding member 210, the first magnetic member 230, and the first lens 220 can move together along the optical axis of the first lens 220 to drive the first lens 220 to approach and move away from the light exit opening 120 along the optical axis direction of the first magnetic member 230.

[0085] In some embodiments, the sliding member 210 is provided with a second light transmission hole 211 for laser light to pass through, the second light transmission hole 211 extends through opposite ends of the sliding member 210, the extending direction of the second light transmission hole 211 is parallel to the sliding direction of the sliding member 210, and the center lines of the first light transmission hole 231 and the second light transmission hole 211 coincide. The extending direction of the accommodating cavity 110 is parallel to the extending direction of the second light transmission hole 211.

[0086] The light exit end of the second light transmission hole 211 faces the light exit port 120. The first magnetic member 230 is arranged on the sliding member 210, the first magnetic member 230 is located in the second light transmission hole 211, and the first lens 220 is arranged on the first magnetic member 230. The laser light in the second light transmission hole 211 can pass through the first lens 220 and the light exit port 120 in sequence. The laser light passes through the light exit port 120, and the focal point of the laser light is located outside the shell 100 to process a workpiece outside the shell 100.

[0087] In other embodiments, the outer periphery of the sliding member 210 is in sliding fit with the side wall of the accommodating cavity 110 to limit the movement of the sliding member 210 in the radial direction of the accommodating cavity 110, and the position of the axis of the second light transmission hole 211 on the sliding member 210 is kept stable.

[0088] In one embodiment, the outer periphery of the sliding member 210 is circular in cross section, and the radial cross section of the accommodating cavity 110 of the shell 100 is circular. In some embodiments, the outer periphery of the sliding member 210 is elliptical, quadrilateral, pentagonal, or the like in cross section, and the shape of the radial cross section of the shell 100 is adapted to the outer periphery of the sliding member 210 to enable the sliding member 210 to slide along the accommodating cavity 110.

[0089] In some embodiments, the sliding member 210 is annular in structure, the first magnetic member 230 is fixed and in fit with the inner peripheral wall of the second light transmission hole 211 of the sliding member 210, and the first lens 220 is in fit and fixed in the first light transmission hole 231 of the first magnetic member 230.

[0090] The sliding member 210 drives the first lens 220 to move, and drives the first lens 220 to approach or move away from the light exit port 120, so that the focal point of the laser light moves to enable different laser processing effects.

[0091] In one embodiment, the laser focusing structure 10 focuses through a single first lens 220, and focuses through a single lens to achieve laser focusing.

[0092] In some embodiments, the laser focusing structure further comprises a second lens 180 arranged close to the light exit port of the shell, and the optical axes of the second lens 180 and the first lens 220 coincide. The first lens 220 and the second lens 180 cooperate to achieve laser focusing.

[0093] The first lens 180 and the second lens 220 cooperate to focus laser light, can reduce the size of a laser spot formed at a machining position, improve the energy density of the laser spot, and improve the machining efficiency.

[0094] In the embodiment, the laser focusing structure further comprises a window mirror 190 arranged at the light outlet 120 of the shell. The window mirror 190 is located on the side of the second lens 180 away from the sliding member 210. The window mirror 190 seals the light outlet 120, can avoid dust from entering the shell 100, and protects the components or structures in the shell 100.

[0095] In some embodiments, the shell 100 comprises an inner shell 160 and an outer shell 170 sleeved outside the inner shell 160. The outer shell 170 comprises a first outer shell 171 and a second outer shell 172, and the light outlet 120 is arranged through the second outer shell 172, and the second lens 180 is arranged on the second outer shell 172.

[0096] Figure 11 It is a connection schematic diagram of the coil on the shell in the first embodiment of the laser focusing structure.

[0097] Referring to Figures 4 to 11 , the coil 300 is used to drive the first magnetic member 230 to slide, and then drive the first lens 220 to move, so as to adjust the position of the focal point of the laser outside the shell 100.

[0098] In the laser focusing structure 10, the coil 300 is used to drive the sliding assembly 200 to move, so as to adjust the position of the first lens 220, thereby the position of the laser focal point can be adjusted. When the laser focusing structure 10 is applied to process a workpiece or an object, the laser focal point is made to fall on the processing material, so that the size of the laser spot on the workpiece or the object is reduced and the energy is concentrated, and the processing precision and the processing efficiency can be improved. The falling point position of the laser focal point can also be adjusted according to different heights or thicknesses of workpieces, so as to ensure that the laser focal point falls on the processing material.

[0099] In the embodiment, when the focal point of the laser is adjusted, only the position of the sliding assembly 200 needs to be adjusted, and the position of the entire laser focusing structure 10 does not need to be adjusted, so that the position adjustment of the laser focal point is more convenient and flexible, a higher driving force does not need to be provided, and the driving energy consumption is reduced.

[0100] In the embodiment, the coil 300 is arranged on the shell, and the center line of the coil is parallel to the optical axis of the first lens 220. The coil 300 can form a magnetic field after being electrified, and the magnetism of the magnetic field interacts with the magnetism of the first magnetic member 230, so as to provide the acting force for driving the first lens 220 to move through the acting force on the first magnetic member 230. The coil can generate a magnetic field when being electrified, so as to drive the first magnetic member to slide along the optical axis of the first lens 220 in the accommodating cavity.

[0101] By passing the current in different directions through the coil 300, different directions of acting force are provided to the first magnetic member 230, so as to drive the slider 210 to move close to and away from the light outlet 120, to realize the adjustment of the laser spot position.

[0102] In the embodiment, the first magnetic member 230 is fixed on the slider 210, and the coil 300 is wound on the outer shell 100. Further, the coil 300 is wound inside the shell 100 or outside the shell 100.

[0103] In some embodiments, the first magnetic member 230 is fixed on the shell 100, and the coil 300 is wound on the slider 210.

[0104] In the embodiment, the shell 100 includes an inner shell 160 and an outer shell 170, and the accommodating cavity 110 is arranged in the inner shell 160. An accommodating space 162 is formed between the inner shell 160 and the outer shell 170, the coil 300 is sleeved on the inner shell 160 and located in the accommodating space 162. The outer shell 170 is detachably sleeved on the outer periphery of the inner shell 160, and the coil 300 is wound on the outer periphery of the inner shell 160. After the coil 300 is arranged outside the inner shell 160, the outer shell 170 is mounted on the inner shell 160, which facilitates the winding of the coil 300, and the outer shell 170 also protects the coil 300.

[0105] The shell 100 is also provided with a wire passing hole 310, and the starting end of the coil 300 and / or the ending end of the coil is arranged in the wire passing hole 310. The wire passing hole 310 is arranged on the first outer shell 171.

[0106] Figure 12 is a cross-sectional view of the second embodiment of the laser focusing structure.

[0107] Referring to Figure 12 , and combining Figures 2 to 11 , in the embodiment, the laser focusing structure includes a shell 100, a sliding assembly 200, and a coil 300. The structure of the sliding assembly 200 is the same as that of the sliding assembly 200 in the above-mentioned embodiments, and will not be repeated here.

[0108] In the embodiment, the shell 100 includes an outer shell 430, a first inner shell 410, and a second inner shell 420. The first inner shell 410 is mounted in the outer shell 430 and forms an accommodating space 162 with the outer shell 430. The second inner shell 420 is mounted in the first inner shell 410, and the second inner shell 420 forms an accommodating cavity 110. The coil 300 is sleeved on the first inner shell 410 and located in the accommodating space.

[0109] In one embodiment, the coil 300 is enclosed around the outer periphery of the sliding assembly 200, so that the force of the coil 300 better acts on the first magnetic member 230, so as to move the sliding assembly 200 faster and more sensitively.

[0110] Figure 13 is a cross-sectional view of the third embodiment of the laser focusing structure.

[0111] Referring to Figure 13 , and combining Figures 2 to 11 , the shell includes an outer shell 530, a first inner shell 510 and a second inner shell 520, the outer shell 530 is formed with a first mounting cavity and a second mounting cavity arranged along the optical axis direction of the first lens 220, the first inner shell 510 and the second inner shell 520 are arranged in the first mounting cavity and the second mounting cavity respectively, the first inner shell 510 is formed with a receiving cavity 110, and the second inner shell 520 and the cavity wall of the second mounting cavity form a receiving space 162, and the coil is sleeved on the second inner shell and located in the receiving space 162.

[0112] In some embodiments, the coil 300 is arranged at one end of the extension direction of the receiving cavity 110, the coil 300 is arranged in the receiving cavity 110, the second inner shell 520 is arranged in the receiving cavity 110 as a winding, one end of the second inner shell 520 faces the sliding member 210, the one end of the second inner shell 520 facing the sliding member 210 can be used as a stop 150, and the coil 300 is arranged on the winding support.

[0113] Referring again to Figures 2 to 13 , the first magnetic member 230 is fixed on the sliding member 210, so that the first magnetic member 230 has a tendency to move along the extension direction of the receiving cavity 110 under the action of the coil 300, so as to drive the sliding member 210 to slide in the shell 100. By changing the direction of the current in the coil 300, the direction of the magnetic field of the coil 300 is changed, the first magnetic member 230 is subjected to the action force in the direction close to or away from the light outlet 120, and the sliding member 210 is driven to be close to or away from the light outlet 120.

[0114] Referring to Figures 3 to 13 , the shell 100 is provided with a stop 150 protruding from the inner side wall of the receiving cavity 110; the stop 150 is provided with two, and the two stops 150 are arranged at both ends of the sliding direction of the sliding member 210, so as to limit the sliding stroke of the sliding member 210. The stop 150 stops the sliding member 210, so that the sliding member 210 is stopped at the preset position after sliding, so as to ensure that the focal point of the laser outside the shell 100 is limited to the preset position, so as to realize the corresponding machining function. For example, when the sliding member 210 is stopped on the two stops 150, the laser focusing structure 10 can realize the engraving and cutting effects respectively.

[0115] In some embodiments, the stop portion 150 is an annular structure, and the stop portion 150 is provided with a through hole for the laser to pass through. The stop portion 150 is arranged not to affect the optical path of the laser, and the stop portion 150 is arranged away from the optical path of the laser.

[0116] In some embodiments, the stop portion 150 is not an annular structure, and the stop portion 150 protrudes from the inner circumferential wall of the accommodating cavity 110 towards one end of the accommodating cavity 110 for stopping and limiting the sliding member 210, and the stop portion 150 is arranged away from the optical path of the laser.

[0117] In some embodiments, the laser focusing structure 10 further comprises two second magnetic members 240, which are respectively fixed on one stop portion 150 to be respectively magnetically attracted to the first magnetic member 230. When the sliding member 210 moves to the corresponding stop plate, the second magnetic member 240 on the corresponding stop portion 150 is magnetically attracted to the first magnetic member 230, so that the sliding member 210 is kept against the corresponding stop portion 150, the position of the first lens 220 on the sliding member 210 is kept, and the position of the focal point of the laser focusing structure 10 is kept stable.

[0118] In a specific embodiment, the two stop portions 150 include a first stop portion 151 and a second stop portion 152, which are arranged at intervals and respectively located at two ends of the sliding member 210. The first stop portion 151 is located on the side of the sliding member 210 facing the light outlet 120, and the second stop portion 152 is located on the side of the sliding member 210 away from the light outlet 120.

[0119] In this embodiment, the stop portion 150 is provided with a accommodating groove 153, and the second magnetic member 240 is fixed in the accommodating groove 153, so that the second magnetic member 240 is fixed on the stop portion 150. The second magnetic member 240 is fixed on the stop portion 150 by means of adhesion or clamping.

[0120] In some embodiments, the second magnetic member 240 is an annular structure, and the first magnetic member 230 is an annular structure, so that the magnetic attraction force between the second magnetic member 240 and the first magnetic member 230 is more uniform, and the limiting of the sliding assembly 200 is more stable and reliable.

[0121] In some embodiments of the present application, the first magnetic member 230 is a magnet, and the second magnetic member 240 is a magnet, and the two have opposite magnetic properties. In other embodiments, the first magnetic member 230 is a magnet, and the second magnetic member 240 is a piece of iron.

[0122] In some embodiments, the shell 100 can be made of plastic, silica gel or other materials, so that the shell 100 has no magnetism to avoid interference.

[0123] Based on the above structure, when the processing function of the laser focusing structure 10 needs to be adjusted, the coil 300 is powered on, the force between the coil 300 and the first magnetic member 230 drives the sliding member 210 to move, and when the sliding member 210 moves to the preset position, it abuts against the stop portion 150 at the corresponding position, and the coil 300 is powered off. The magnetic force between the first magnetic member 230 and the second magnetic member 240 keeps the position of the sliding member 210, and the coil 300 does not need to be powered on for a long time, saving energy.

[0124] In a specific embodiment, after the coil 300 is powered on, the force between the coil 300 and the first magnetic member 230 drives the sliding member 210 to move towards the light outlet 120, and after the sliding member 210 moves to the preset position, the sliding member 210 abuts against the first stop portion 151. The coil 300 is powered off, and the first magnetic member 230 and the second magnetic member 240 at the first stop portion 151 are magnetically attracted to keep the abutment between the sliding member 210 and the first stop portion 151, and keep the position of the sliding member 210. When the processing function of the laser focusing structure 10 needs to be adjusted, the coil 300 is provided with current in the opposite direction, the force between the coil 300 and the first magnetic member 230 drives the sliding member 210 to move away from the light outlet 120, and after the sliding member 210 moves to the preset position, the sliding member 210 abuts against the second stop portion 152. The coil 300 is powered off, and the first magnetic member 230 and the second magnetic member 240 at the second stop portion 152 are magnetically attracted to keep the abutment between the sliding member 210 and the second stop portion 152, and keep the position of the sliding member 210.

[0125] In addition, the terms "first", "second", "third" and the like are used only to describe and distinguish one element from another, and do not necessarily indicate or imply an order or sequence in their use or a relative importance of the elements. Thus, a feature defined with "first", "second" or the like can include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise expressly specified.

[0126] In this application, unless otherwise clearly indicated and limited, the terms "assembly", "connection", and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. In the description of the specification, the description referring to the terms "some embodiments", "exemplarily" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0127] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application, therefore any changes or modifications made according to the claims and specification of the present application shall be within the scope of the present application.

Claims

1. A laser focusing structure for a laser processing apparatus, characterized by, The laser focusing structure comprises: a housing formed with a receiving cavity and a light outlet communicating with the receiving cavity; a first magnetic member arranged in the receiving cavity and capable of sliding relative to the receiving cavity, the first magnetic member having a first light passing hole; a first lens fixed in the first light passing hole of the first magnetic member, laser being capable of passing through the first lens and being emitted from the first light passing hole towards the light outlet; a coil arranged in the housing, a center line of the coil being parallel to an optical axis of the first lens, the coil being capable of generating a magnetic field when energized to drive the first magnetic member to slide along the optical axis of the first lens in the receiving cavity.

2. The laser focusing structure according to claim 1, characterized in that, The laser focusing structure further comprises a sliding member, an outer periphery of the sliding member being slidably fitted to a side wall of the receiving cavity, the sliding member being provided with a second light passing hole, the first magnetic member being arranged on the sliding member, and a center line of the first light passing hole and the second light passing hole being coincident.

3. The laser focusing structure according to claim 2, characterized in that, The housing is provided with stoppers at two ends of the receiving cavity or in the receiving cavity, the stoppers being two and arranged on two sides of the sliding member in a sliding direction, the two stoppers being respectively used for abutting against two ends of the sliding member in a sliding process of the sliding member to limit a sliding stroke of the sliding member.

4. The laser focusing structure according to claim 3, characterized in that, The laser focusing structure further comprises two second magnetic members, the two second magnetic members being respectively arranged on the two stoppers, and the second magnetic members being capable of being magnetically attracted to the first magnetic member.

5. The laser focusing structure according to claim 4, characterized in that, The stoppers are provided with receiving grooves, and the second magnetic members are fixed in the receiving grooves.

6. The laser focusing structure according to claim 1, wherein, The housing comprises an inner housing and an outer housing sleeved outside the inner housing, the receiving cavity is formed in the inner housing, and a receiving space is formed between the inner housing and the outer housing, the coil is sleeved on the inner housing and located in the receiving space.

7. The laser focusing structure of claim 1, wherein, The housing comprises an outer housing, a first inner housing and a second inner housing, the outer housing is formed with a first mounting cavity and a second mounting cavity arranged along an optical axis direction of the first lens, the first inner housing and the second inner housing are respectively arranged in the first mounting cavity and the second mounting cavity, the first inner housing is formed with the receiving cavity, and the second inner housing and a cavity wall of the second mounting cavity form a receiving space, the coil is sleeved on the second inner housing and located in the receiving space.

8. The laser focusing structure of claim 1, wherein, The housing comprises an outer housing, a first inner housing and a second inner housing, the first inner housing is mounted in the outer housing and forms a receiving space with the outer housing, the second inner housing is mounted in the first inner housing, the second inner housing is formed with the receiving cavity, and the coil is sleeved on the first inner housing and located in the receiving space.

9. The laser focusing structure of claim 1, wherein, The laser focusing structure further comprises a second lens arranged close to the light outlet of the housing, the second lens coincides with the optical axis of the first lens, and the second lens is used for cooperating with the first lens to realize focusing of the laser.

10. The laser focusing structure of claim 1, wherein, The housing is further provided with a wire passing hole, and a starting end of the coil and / or a terminal end of the coil is arranged in the wire passing hole.

11. A laser processing apparatus characterized by comprising: The device comprises: a device body; a laser generator arranged in the device body; The laser focusing structure of any one of claims 1 to 10, disposed in an emission light path of the laser generator.

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