CN109861063B - Laser copying device - Google Patents
Laser copying device Download PDFInfo
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- CN109861063B CN109861063B CN201910279740.6A CN201910279740A CN109861063B CN 109861063 B CN109861063 B CN 109861063B CN 201910279740 A CN201910279740 A CN 201910279740A CN 109861063 B CN109861063 B CN 109861063B
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Abstract
The invention relates to the technical field of lasers, and discloses a laser copying device, which comprises: the laser comprises a laser incidence seat, a protective mirror suite and a laser absorption assembly; a window of a laser output optical cable is inserted into the laser input hole at the first end of the laser incidence seat and is coaxially arranged with the laser input hole; the second end of the laser incidence seat is connected with the laser absorption assembly; the protective lens suite comprises a protective lens which is perpendicular to the laser entrance hole; and at the position where the protective mirror is arranged, the protective mirror covers the cross section of the laser incidence hole and is connected with the laser incidence seat in a sealing way. The laser copying device provided by the invention seals and isolates the area where the window is positioned from the external environment, provides a cleaner working environment for the window mirror, and can effectively prevent external dust, dust volatilized from the laser absorption assembly and impurities from entering the area where the window is positioned to damage the window of the output optical cable.
Description
Technical Field
The invention relates to the technical field of lasers, in particular to a laser copying device.
Background
Before leaving the factory, the high-power fiber laser needs to simulate the actual running state and carry out long-time aging screening of the whole machine so as to control the reject ratio of the product and improve the quality of the product, namely the effect of the copying device. Because the copying device of the high-power fiber laser operates in a high-power energy absorption state for a long time, the energy reflection surface and the energy absorption surface of the traditional copying device are seriously consumed and worn, and dust impurities volatilized in the process can cause damage to an output optical cable head window of the high-power fiber laser.
Therefore, the conventional copying device is used for copying the high-power fiber laser, so that the delivery cost of the product is greatly increased, and unnecessary waste is caused. Meanwhile, the traditional copying device only has some simple control functions, such as a switch and an alarm function, and cannot reasonably and effectively simulate the operation condition of the laser in an actual state.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to provide a laser copying device which is used for solving or partially solving the problem that the traditional copying device is easy to cause damage to a window of an output optical cable head of a laser.
(II) technical scheme
In order to solve the technical problem, the present invention provides a laser copying device, which includes a laser incident seat, and further includes: a protective mirror assembly and a laser absorbing assembly; a laser input hole is arranged in the laser incidence seat in a penetrating manner from the first end to the second end, and a window of a laser output optical cable is inserted into the laser input hole at the first end of the laser incidence seat and is coaxially arranged with the laser input hole; the second end of the laser incidence seat is connected with the laser absorption assembly; the protective lens suite comprises a protective lens which is perpendicular to the laser incidence hole; and the protective mirror covers the cross section of the laser incidence hole at the position where the protective mirror is arranged and is in sealing connection with the laser incidence seat.
On the basis of the scheme, the laser absorbing assembly comprises an absorber and a conical reflector; the absorber is of a cylindrical structure with two open ends, a blackening coating is arranged on the inner surface of the absorber, and the cross-sectional area of the absorber is larger than that of the laser entrance hole; the first end of the absorber is detachably and fixedly connected with the second end of the laser incidence seat, the conical surface reflector is arranged inside the second end of the absorber, the conical surface faces the laser incidence hole, the bottom of the conical surface reflector is connected with a bottom plate, and the bottom plate is detachably and hermetically connected with the second end of the absorber.
Based on the scheme, the conical surface of the conical surface reflector is in a concave structure; the conical surface reflector and the laser incident hole are eccentrically arranged.
In addition to the above, the laser absorbing assembly further includes a housing; the shell is of a cylindrical structure with an opening at a first end, and is sleeved on the outer side of the absorber, and the first end of the shell is detachably connected with the second end of the laser incidence seat or the first end of the absorber; the outer surface of the absorber is provided with a thread structure, the inner surface of the shell is in contact with the thread structure, and a first cooling water channel is formed between the shell and the absorber; a water inlet is formed in the end face of the second end of the shell, and a water outlet is formed in the side wall of the first end of the shell; and a conical hole communicated with the first cooling water channel is formed in the conical reflector.
On the basis of the scheme, the laser incident hole is sequentially divided into a cylindrical section and a divergent section from the first end to the second end of the laser incident seat, so that light rays emitted by a laser can pass through the laser incident hole; a first diaphragm is arranged at the laser incidence hole at the first end of the laser incidence seat, and an anti-reflection diaphragm is arranged between the second end of the laser incidence seat and the laser absorption assembly; the middle through hole of the anti-reflection diaphragm and the laser entrance hole are coaxially arranged and gradually expanded in shape and are matched with light rays emitted by the laser.
On the basis of the scheme, the protective mirror suite further comprises a mirror support and a mirror cover; the lens support is provided with a stepped hole, and the stepped hole is divided into a first hole section, a second hole section and a third hole section which are sequentially connected from one side to the other side of the lens support and gradually reduced in aperture; the protective mirror is placed in the second hole section, the mirror cover is annular and is detachably connected with the end part of the second hole section in the first hole section, and a plug seal is arranged between the mirror cover and the protective mirror; a slot is formed in the laser incidence seat and perpendicular to the laser incidence hole, the lens holder is inserted into the slot so that the section of the laser incidence hole is vertically covered by the protective lens, and the lens cover faces the window; sealing gaskets are arranged in the grooves and between the surface of the lens holder and the groove wall; the lens support is detachably connected with the laser incidence seat.
On the basis of the scheme, the method further comprises the following steps: a positioning assembly for the laser output optical cable; the positioning assembly comprises an optical cable positioning sleeve; the optical cable locating sleeve is detachably connected with the first end of the laser incidence seat, the optical cable locating sleeve is sleeved outside the laser output optical cable close to the window end, the inner locating hole is coaxially arranged with the laser incidence hole, and the shape and the size of the locating hole are adapted to the outer surface of the laser output optical cable close to the window end.
On the basis of the scheme, the positioning assembly further comprises: a clamping member and a mounting bracket; the mounting frame is fixedly connected with the first end of the laser incidence seat, and the clamping piece is arranged on the mounting frame in an adjustable manner along the length direction of the laser output optical cable; the clamping piece is in a V shape, a U shape or a Y shape and is used for clamping and fixing the laser output optical cable; the inner surface of the clamping piece is provided with a flexible cushion layer.
On the basis of the scheme, the outer surface of the optical cable positioning sleeve is provided with radiating fins; the optical cable locating sleeve is provided with a locating screw, and the locating screw passes through the optical cable locating sleeve along the direction perpendicular to the laser output optical cable and abuts against the laser output optical cable; thermistors are respectively arranged on the surface of the optical cable positioning sleeve and the end face of the shell; and a second cooling water channel is arranged in the laser incidence seat.
On the basis of the scheme, the method further comprises the following steps: a laser detector and a detection hole; the detection hole is perpendicular to the laser incidence hole and is communicated with the laser incidence hole and the outside of the laser incidence seat at one side of the laser incidence hole, and the laser detector is arranged in the detection hole.
(III) beneficial effects
According to the laser copying device provided by the invention, the area where the window of the output optical cable is positioned is isolated from the laser energy absorption area by arranging the protective mirror suite between the window and the laser absorption assembly; the area where the window is positioned is sealed and isolated from the external environment by the sealing connection of the protective mirror and the laser incident seat, so that a cleaner working environment is provided for the window mirror. In the process of copying, external dust, dust volatilized during copying on an energy reflecting surface and an absorbing surface of the laser absorption assembly and impurities can be effectively prevented from entering the area where the window is located and being sintered on the window by laser, so that the window of the output optical cable is damaged. Therefore, the loss of the protective mirror can be used for replacing the loss of the laser output optical cable head only by cleaning or replacing the protective mirror regularly, and the production and manufacturing cost of the laser is reduced.
Drawings
FIG. 1 is an overall elevation view of a laser copying apparatus according to an embodiment of the present invention;
FIG. 2 is an overall side view of a laser copying apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view along the A-A plane of FIG. 1 of an embodiment of the present invention;
FIG. 4 is a schematic view showing the internal structure of a copying apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic view of a conical reflector in accordance with an embodiment of the invention;
FIG. 6 is a schematic view of the connection of a conical reflector to an absorber according to an embodiment of the invention;
FIG. 7 is a schematic view of a reflective surface and an absorptive surface according to an embodiment of the present invention;
FIG. 8 is a first schematic view of an absorber according to an embodiment of the present invention;
FIG. 9 is a second schematic view of an absorber according to an embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view taken along the B-B plane in FIG. 3, in accordance with an embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view along the line C-C in FIG. 3 of an embodiment of the present invention;
fig. 12 is a schematic view illustrating a structure of a protective glass sleeve according to an embodiment of the present invention.
Reference numerals illustrate:
1-a laser output optical cable; 2-a clamping piece; 3-mounting rack;
4-a flexible cushion layer; 5-an optical cable positioning sleeve; 6, positioning a screw;
7-a thermistor; 8-a laser incidence seat; 9-a photoelectric sensor;
10, a mounting sleeve; 11-a lens holder; 12-a mirror cover;
13-sealing by flooding; 14-a protective mirror; 15-a sealing gasket;
16-a first sealing ring; 17-an anti-reflection aperture; 18-an absorber;
19-conical reflector; 20-a housing; 21-a second sealing ring;
22-a third sealing ring; 23-a control cabinet; 24-a power conversion circuit board;
25-a laser signal acquisition and control circuit board; 27-an alarm;
26-signal acquisition and control circuit board of copying device; 28-a communication interface;
29-a power interface; 30-switching; 31-a signal acquisition interface;
32-alarm signal lamp; 33-a thread structure; 34—a first mount;
35-a water inlet; 36-water outlet; 37-laser entry hole;
38-a bottom plate.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
An embodiment of the present invention provides a laser copying apparatus, referring to fig. 3 and 4, including: a laser incidence seat 8, a protective mirror suite and a laser absorption assembly. The laser entrance seat 8 is internally provided with a laser entrance hole 37 penetrating from the first end to the second end. The window of the laser output optical cable 1 is inserted into the laser entrance hole 37 at the first end of the laser entrance seat 8 and is disposed coaxially with the laser entrance hole 37. The second end of the laser entrance seat 8 is connected to a laser absorbing assembly. The protective mirror assembly includes a protective mirror 14 disposed perpendicular to the laser entrance aperture 37. At the position where the protective mirror 14 is provided, the protective mirror 14 covers the cross section of the laser entrance hole 37 and is hermetically connected to the laser entrance seat 8.
The laser copying device provided by the embodiment is used for carrying out complete machine aging screening before leaving a factory of a laser, and can be suitable for high-power fiber lasers. The laser has an output optical cable for transmitting laser light. One end of the output optical cable outputting laser is a window. A window is inserted inside the first end of the laser entrance hole 37 inside the laser entrance mount 8. So that the laser light is transmitted along the laser-entry hole 37. The laser light will pass through the second end of the laser entry hole 37 into the laser absorption assembly. The laser absorbing assembly absorbs and consumes laser energy.
The protection mirror 14 is disposed perpendicular to the laser entrance hole 37, i.e., the protection mirror 14 is perpendicular to the laser transmission direction. The protection mirror 14 is located in the laser light transmission direction, and at the position where the protection mirror 14 is disposed, the protection mirror 14 can cover all the laser light emitted from the window, that is, the laser light emitted from the window must pass through the protection mirror 14. A protective mirror 14 is arranged inside the laser entrance mount 8, i.e. between the window and the laser absorbing assembly, separating the window from the laser absorbing assembly. By the sealed connection of the protective mirror 14 to the laser entrance mount 8, a sealed separation between the window and the laser absorbing assembly is created.
According to the laser copying device provided by the embodiment, the area where the window of the output optical cable is located is isolated from the laser energy absorption area by arranging the protective mirror suite between the window and the laser absorption assembly; the area where the window is positioned is sealed and isolated from the external environment by the sealing connection of the protective mirror 14 and the laser incidence seat 8, so that a cleaner working environment is provided for the window mirror. In the process of copying, external dust, dust volatilized during copying on the energy reflecting surface and the absorbing surface of the laser absorption assembly, and impurities enter the area where the window is located and are sintered on the window by laser, so that the window of the output optical cable is damaged. Therefore, only the protective mirror 14 needs to be cleaned or replaced regularly, the loss of the protective mirror 14 can be used for replacing the loss of the window of the laser output optical cable 1, and the production and manufacturing cost of the laser is reduced.
Further, the protection mirror 14 may be a lens, and may be selected according to the wavelength of the penetrating laser light and the magnitude of the laser power.
Further to the above embodiments, referring to fig. 3 and 4, the laser light absorbing assembly includes an absorber 18 and a conical reflector 19. The absorber 18 has a cylindrical structure with two open ends, and the inner wall is a cylindrical surface. The inner surface of the absorber 18 is blackened for absorbing laser energy. The cross-sectional area of the absorber 18 is larger than the cross-sectional area of the laser-entry hole 37. The first end of the absorber 18 is detachably and fixedly connected with the second end of the laser incidence seat 8.
Referring to fig. 5 and 6, a cone reflector 19 is provided inside the second end of the absorber 18, with the cone facing the laser entrance aperture 37. The bottom of the conical reflector 19 is connected with a bottom plate 38, and the bottom plate 38 is detachably and hermetically connected with the second end of the absorber 18. The conical reflector 19 is made of aluminum alloy or oxygen-free copper. The conical surface is subjected to mirror surface treatment, and laser is reflected. The bottom panel 38 may be connected to the absorber 18 at a second end face thereof or may be connected to the inner side wall of the absorber 18 at the second end of the absorber 18. A third seal 22 may be provided between the base plate 38 and the absorber 18 for sealing connection, and the third seal 22 may be an O-ring.
Further, with reference to FIG. 5, the conical surface of the conical reflector 19 has a concave configuration, i.e., the conical surface is concave toward the interior of the conical reflector 19, based on the above-described embodiments. The conical reflector 19 is arranged eccentrically to the laser entrance aperture 37. The intersection line of the conical surface reflector 19 and the radial section is in the shape of a concave circular arc.
The axis of the conical reflector 19 is not coaxial with the incident light, i.e. not coaxial with the laser entrance aperture 37; but the axis of the conical reflector 19 is parallel to the axis of the laser entry hole 37 with a slight eccentric distance. Decentration between the axis of the cone reflector 19 and the incident light can avoid the original reflection of the incident light at the sharp point of the cone reflector 19. The axis of the conical reflector 19 is coaxial with the inner cylindrical surface of the absorber 18.
Referring to fig. 3, 4 and 7, the first end of the laser entrance mount 8 is provided with a first diaphragm at the laser entrance aperture 37. An anti-reflection diaphragm 17 is arranged between the second end of the laser incidence seat 8 and the laser absorption component. The middle through hole of the anti-reflection diaphragm 17 is coaxially arranged with the laser entrance hole 37 and is shaped as a divergent shape, and is adapted to the light emitted by the laser.
The anti-reflection diaphragm 17 is installed at the rear of the laser incidence seat 8, one side is connected with the second end face of the laser incidence seat 8, and the other side is connected with the absorber 18. The through hole is coaxial with the incident light, and the through hole structure is in a flare diffusion shape according to the divergence angle delta of the incident light. And wall surface S at the through hole 4 Surface S facing absorber 18 3 Mirror processing is performed to serve as a reflecting surface for reflecting the light beam of the outer line. The face facing the absorber 18 is the side connected to the absorber 18. The anti-reflection diaphragm 17 is internally provided with a cooling water channel for cooling the reflecting surface S thereof 3 And S is 4 。
The whole conical reflector 19 has a conical structure, and the front surface is a conical surface facing the laser entrance hole 37 and is a reflecting surface. Conical surface reflecting surface S of conical surface reflector 19 1 Cylindrical inner wall absorption surface S of absorber 18 2 Surface S of antireflection diaphragm 17 facing absorber 18 3 Wall surface S at middle through hole 4 A cylindrical front-back reflection and an absorption cavity for absorbing energy in the middle are formed, and incident laser oscillates back and forth in the cavity for reflection and absorption.
An important condition for forming back oscillation reflection absorption due to incident laser light is that the cone angle theta of the conical reflector 19 is more than 90 degrees larger than the laser divergence angle delta. Meanwhile, under the same conditions, the smaller the cone angle θ of the cone mirror 19, the incident laser light is on the cylindrical inner wall absorption surface S of the absorber 18 2 When the vibration absorption is carried out in a single round in the length direction, the more the reflection times are, the more the energy absorption times are, and the faster the speed is. While the conical surface reflecting surface S of the conical reflector 19 1 The concave structure of (a) is that the concave circular arc shape is opposite to the straight line shape, and the edge beam of the incident laser is on the conical surface reflecting surface S of the conical surface reflector 19 1 When the laser beam is reflected once, the cone angle theta of the conical reflector 19 is smaller, namely when the cone angle theta of the conical reflector 19 is the same, the concave circular arc shape of the conical reflector 19 is opposite to the straight line shape, and when the central beam of the incident laser beam is absorbed by single back and forth oscillation in the length direction of the absorber 18, the laser beam can be reflected onceMore.
The concave circular arc shape of the conical reflector 19 can also make the first absorption point of the edge beam and the first absorption point of the center beam of the incident laser beam on the cylindrical inner wall absorption surface S of the absorber 18 2 The distance between the first absorption point and the central beam is longer, so that the energy distribution of the first absorption point of the total beam is more uniform, and the distance between the first absorption point of the edge beam and the anti-reflection diaphragm 17 is also acceptable because the Gaussian distribution of the laser beam causes the energy density of the edge beam relative to the central beam to be smaller.
Conical reflecting surface S adopting reasonable conical reflecting mirror 19 1 Is matched with a reasonable cone angle theta, and can achieve the conical surface reflecting surface S of the conical surface reflector 19 in the process of one-time back and forth oscillation reflection and absorption 1 And a reflection surface S of the anti-reflection diaphragm 17 3 、S 4 Only once, while the absorption surface S of the absorber 18 2 The purpose of the reflection absorption times as much as possible and the more uniform first energy absorption distribution is achieved, thereby achieving higher energy absorption efficiency.
Further to the above embodiments, the laser absorption assembly further comprises a housing 20. The casing 20 is a cylindrical structure with an opening at a first end, the casing 20 is sleeved outside the absorber 18, and the first end is detachably connected with the second end of the laser incident seat 8 or the first end of the absorber 18. The outer surface of the absorber 18 is provided with a screw thread structure 33. The inner surface of the housing 20 is in contact with the screw structure 33, and a first cooling water passage is formed between the housing 20 and the absorber 18. A water inlet 35 is provided on the end face of the second end of the housing 20 and a water outlet 36 is provided on the side wall of the first end of the housing 20. The conical surface reflector 19 is internally provided with a conical hole communicated with the first cooling water channel.
The outer wall of the absorber 18 is a thread structure 33, and is in a single thread, double thread or triple thread structure according to the required energy consumption; the cross-sectional shape of the threads is combined to match with the inner wall of the shell 20 to form a single water channel, double water channel or three water channel structure with a spiral structure. The back of the conical reflector 19 is of conical counterbore construction, i.e. the conical reflector 19 is internally provided with a conical bore which extends through the base plate 38 and communicates with the first cooling gallery inside the housing 20. The shape of the conical hole is consistent with that of the conical reflector 19, so that cooling water can cool the reflecting surface in the conical hole conveniently.
Referring to fig. 10 and 11, the water inlet 35 and the water outlet 36 provided on the housing 20 are provided at positions consistent with the rotation direction of the threads of the outer wall of the absorber 18. Two water inlets 35 may be provided at the second end of the housing 20 and two water outlets 36 may be provided at the first end of the housing 20 in the direction of water flow in the first cooling water channel. The water inlet 35 and the water outlet 36 can be connected with an external pipeline by quick insertion of an elbow.
Referring to fig. 6, 8 and 9, the first end of the absorber 18 may be provided with a first mount 34 having a cross section larger than the cross section of the absorber 18, and detachably connected to the laser entrance mount 8 or the anti-reflection diaphragm 17 through the first mount 34. The housing 20 may be threadably coupled to the first mount 34 at a first end of the absorber 18, and a second seal 21 may be provided at the coupling to seal, the second seal 21 being an O-ring.
The first cooling water channel of the absorber 18 is formed by using the inner wall of the shell 20 and the threaded outer wall of the absorber 18 and the conical counter bore outer wall of the back surface of the conical reflector 19. Cooling water enters from a water inlet 35 at the rear part of the shell 20, and forms a rotary vortex at a conical counter bore at the back surface of the conical reflector 19 to cool the conical reflector 19. And then rotates into the first cooling water channel on the outer wall of the absorber 18 in the same direction, and takes away the energy absorbed by the absorber 18. And finally out the front water outlet 36. The overall water channel flow is spiral and is consistent with the rotation direction of the threads on the outer wall of the absorber 18. The first cooling water channel can ensure that the whole absorber 18 and the conical surface reflector 19 are in a state of being soaked by cooling water, and ensure that the cooling water at each position in the water channel flows at a high speed, so that the heat dissipation capability of the laser absorption assembly is ensured to the greatest extent.
Further, with reference to fig. 3, 4 and 7, the laser entrance hole 37 is divided into a cylindrical section and a diverging section from the first end to the second end of the laser entrance seat 8 in order, so that the light emitted from the laser can pass through the laser entrance hole 37.
Further, referring to fig. 12, the protective lens assembly further includes a lens holder 11 and a lens cover 12. The lens support 11 is provided with a stepped hole, and the stepped hole is divided into a first hole section, a second hole section and a third hole section which are sequentially connected from one side to the other side of the lens support 11 and gradually reduced in aperture. The protective mirror 14 is placed in the second hole section, the mirror cover 12 is annular and is detachably connected with the end part of the second hole section in the first hole section, and the flood plug seal 13 is arranged between the mirror cover 12 and the protective mirror 14. The laser incidence seat 8 is provided with a slot perpendicular to the laser incidence hole 37. The lens holder 11 is inserted into the slot such that the protective lens 14 vertically covers the cross section of the laser entrance hole 37, and the lens cover 12 faces the window. A gasket 15 is provided in the groove between the surface of the lens holder 11 and the groove wall. The lens holder 11 is detachably connected with the laser incidence seat 8.
In the protective mirror suite, a mirror cover 12 is arranged on a light facing surface of a mirror support 11, a flood plug seal 13 is arranged between the mirror cover 12 and a protective mirror 14, the flood plug seal 13 is deformed under pressure, and the protective mirror 14 is pressed to be attached to a protective mirror 14 mounting counter bore, namely a stepped hole, on the mirror support 11. The end face of the mirror cover 12 is flush with the surface of the mirror support 11, so that the mirror cover and the mirror support 11 are conveniently inserted into a groove on the laser incidence seat 8 integrally.
The grooves should pass through the laser entrance holes 37 from the surface of the laser entrance mount 8 in a direction perpendicular to the laser entrance holes 37 so that the protection mirror 14 covers the cross section of the laser entrance holes 37. One end of the lens holder 11 is inserted into the slot, and the other end of the lens holder can be provided with a second mounting seat which can be in threaded connection with the surface of the laser incident seat 8. A gasket 15 may also be provided where the second mount contacts the surface of the laser entrance mount 8. The gasket 15 may be a foam gasket. A foam gasket 15 is provided at the mounting surfaces of the lens holder 11 and the laser light incident seat 8.
The protective mirror package can be placed anywhere between the window and absorber 18 assembly to serve the purpose of sealing the window. Further, when the protective lens assembly is disposed at the second end of the laser incident seat 8, the rear side surface of the lens support 11 may contact with the anti-reflection diaphragm 17, and at this time, a first sealing ring 16 may be disposed on a contact surface between the lens support 11 and the anti-reflection diaphragm 17 for sealing, and the first sealing ring 16 may be an O-ring.
Further, with reference to fig. 1, the laser copying apparatus further includes: a positioning component of the laser output optical cable 1; the positioning assembly comprises an optical cable positioning sleeve 5, a clamping piece 2 and a mounting frame 3. The optical cable locating sleeve 5 is detachably connected with the first end of the laser incidence seat 8. The optical cable locating sleeve 5 is sleeved outside the output optical cable close to the window end, and an inner locating hole and a laser input hole 37 are coaxially arranged. The shape and the size of the positioning hole are matched with the outer surface of the laser output optical cable 1 close to the window end. The mounting bracket 3 is fixedly connected with a first end of a laser incidence seat 8, and the clamping piece 2 is arranged on the mounting bracket 3 along the length direction of the laser output optical cable 1 in an adjustable mode. The clamping piece 2 is V-shaped, U-shaped or Y-shaped and is used for clamping and fixing the output optical cable. The inner surface of the holder 2 is provided with a flexible cushion layer 4.
The optical cable locating sleeve 5 is designed according to the output optical cable types, and corresponds to different output optical cables such as QD, QBH and the like for replacement. Meanwhile, the clamping piece 2 is also designed according to the output optical cable type, and the front and back positions of the clamping installation frame 3 are adjusted so as to conveniently clamp and fix different output optical cables. The clamping place of the clamping piece 2 is provided with a clamping sponge cushion.
Further, on the basis of the above embodiment, the outer surface of the optical cable positioning sleeve 5 is provided with heat dissipation fins. The optical cable locating sleeve 5 is provided with a locating screw 6, and the locating screw 6 passes through the optical cable locating sleeve 5 to prop against the output optical cable along the direction perpendicular to the output optical cable. The surface of the optical cable locating sleeve 5 and the end face of the shell 20 are respectively provided with a thermistor 7. The first end of the laser incidence seat 8 is internally provided with a second cooling water channel and the periphery of the protective mirror 14 in the mirror support 11 is respectively provided with a second cooling water channel.
Further, in addition to the above embodiment, a laser copying apparatus further includes: a laser detector and a detection hole; the detection hole is perpendicular to the laser-entering hole 37 and communicates the laser-entering hole 37 with the outside of the laser-entering seat 8 at one side of the laser-entering hole 37, and the laser detector is disposed in the detection hole.
The design positioning mode of the optical cable positioning sleeve 5 is consistent with the design positioning principle and the position of the laser output optical cable 1 according to different types of the laser output optical cable 1, namely the window end. The position of the laser outputting the optical cable 1 is ensured by the special shape and limit design of the insertion opening of the optical cable locating sleeve 5. Meanwhile, the position of the head of the laser output optical cable 1 is finely adjusted through the positioning screw 6 arranged on the output optical cable positioning sleeve 5, so that the whole positioning of the head of the laser output optical cable 1 is completed. Namely, the optical cable locating sleeve 5 is sleeved on the outer side of the output optical cable head to locate the radial direction of the output optical cable head. A set screw 6 is provided to position the axis of the output cable head, i.e. the laser emission direction.
To prevent the positioning from loosening, after the positioning of the laser output optical cable 1 is completed, the tail of the laser output optical cable 1 is clamped using a V-shaped clamp mounted on the clamp mount 3. And use the centre gripping foam-rubber cushion, place between V-arrangement centre gripping and laser output optical cable 1, when preventing that laser output optical cable 1 location is not hard up, can not influence its location because of the overconstraint.
Radiating fins are designed on the outer cylindrical surface of the optical cable positioning sleeve 5, and auxiliary heat dissipation is carried out on the output optical cable arranged in the optical cable positioning sleeve 5 through the radiating fins. Because of the matched contact between the laser output optical cable 1 and the optical cable positioning sleeve 5, the heat of the laser output optical cable 1 can be conducted to the optical cable positioning sleeve 5 and radiated through the radiating fins, so that the effect of assisting the laser output optical cable 1 in radiating is achieved. And, the side of the optical cable locating sleeve 5 is provided with a thermistor 7 for measuring and monitoring the temperature of the optical cable 1 output by the laser and feeding back to the copying control assembly as a reference condition for intelligent copying control.
The laser entry hole 37 remains coaxial with the cable positioning sleeve 5, i.e. with the incident light. And the front structure of the laser entrance hole 37, i.e. the first end, is provided with a small-caliber first diaphragm, and the tail structure, i.e. the position close to the second end, is in a horn mouth diffusion shape according to the divergence angle of the incident light. The laser detection hole of the laser detector is vertically communicated with the middle area of the laser incidence hole 37, and the laser incidence seat 8 is provided with a laser detector on the side surface. The protective mirror 14 set is installed at the position of the sinking table on the rear part of the laser incidence hole 37, and the central axis of the protective mirror 14 is coaxial with the laser incidence hole 37 of the laser incidence seat 8.
The second cooling water channel is designed in the laser incidence seat 8 to provide auxiliary cooling for the front optical cable positioning sleeve 5 and the internal protective lens suite, and to isolate heat conducted by the rear energy absorption assembly. The lens holder 11 is provided with a second cooling water channel for cooling the protective lens 14 arranged therein. The anti-reflection diaphragm 17 may also be provided with a cooling water channel for cooling the reflecting surface thereof. A thermistor 7 is installed at the rear of the housing 20 to measure and monitor the temperature of the cooling water at the rear of the tapered mirror 19 of the copying device and feed back to the copying control assembly as a reference condition for intelligent copying control.
Further, with reference to fig. 1 and 2, on the basis of the above embodiment, a laser copying apparatus further includes: a control cabinet 23; the surface of the control cabinet 23 is provided with a power interface 29, a switch 30, a control panel and an alarm 27, a controller and a communication device are arranged in the control cabinet 23, and the controller is respectively connected with the power interface 29, the switch 30, the control panel, the alarm 27, the laser, the communication device, the thermistor 7 and the laser detector.
The control cabinet 23 is a control component of the copying apparatus. The power interface 29 is used to switch on an external power supply. The switch 30 can control the opening and closing of the whole copying device. The controller may include a power conversion circuit board 24 for converting power to usable power, a laser signal acquisition and control circuit board 25 for integrated intelligent control of laser operation, and a copying device signal acquisition and control circuit board 26 for integrated intelligent control of copying devices. The communication device may be a communication interface 28 provided on the surface of the control cabinet 23 or may be a wireless communication module. The communication interface 28 can be divided into an upper computer communication interface and a laser communication interface. The wireless communication module can be divided into an upper computer communication module and a laser communication module.
The control panel is provided on the surface of the control cabinet 23, which may be a functional panel, and the copying device may be manually controlled and adjusted by the control panel. The surface of the control cabinet 23 is also provided with a signal acquisition interface 31 and an alarm signal lamp 32. The signal acquisition interface 31 may be in communication with a laser detector. The signal acquisition units of the thermosensitive assembly 7 and the like are connected, and signals are obtained and fed back to the controller.
The laser signal acquisition and control circuit board 25 can be connected with the laser through the laser communication interface 28; the laser signal acquisition and control circuit board 25 is connected with the copying device signal acquisition and control circuit board 26; the copying device signal acquisition and control circuit board 26 is connected with an upper computer through an upper computer communication interface 28, so that the operation of the laser is conveniently controlled through the upper computer. Wherein the copying device signal acquisition and control circuit board 26 has the function of simulating CNC. The program in the chip of the circuit board can simulate the normal work of a real CNC machine tool, such as various working instructions sent by the machine tool to a laser under the conditions of perforation operation, cutting operation, welding operation and the like. The working instructions are implemented on the laser, namely the ratio combination of an on/off signal of the laser, a continuous/pulse mode signal of the emergent light, a frequency value of the pulse, a duty ratio value of the pulse and a magnitude value of the emergent light power.
The most commonly used proportioning conditions can be selected, a program written into circulation operation forms different laser operation modes, and meanwhile, real-time state signals of the laser and the copying device are monitored and collected in the process, effective early warning and alarming are carried out, and the state of the laser is controlled, so that the function of simulating CNC is completed. In addition, the original low-power and high-power copying machine forms a copying process which is more fit with reality and is more effective. The specific operation mode of the laser can be regulated and controlled through the upper computer, and the specific operation mode of the laser can be selectively controlled through the control panel.
On the basis of the embodiment, further, the copying device for the high-power fiber laser is made of aluminum alloy basically and comprises four parts, namely an output optical cable positioning and clamping assembly, a laser incidence and isolation assembly, a laser energy absorption assembly and a copying control assembly. The output optical cable positioning and clamping assembly comprises a V-shaped clamping, a clamping installation frame 3 and an optical cable positioning sleeve 5. The laser incidence and isolation assembly is arranged at the rear part of the output optical cable positioning and clamping assembly and comprises a laser incidence seat 8, a laser detector and a protective lens sleeve member.
The optical cable locating sleeve 5 and the clamping installation frame 3 are both installed on the front end face of the laser incidence seat 8. The optical cable locating sleeve 5 and the laser incidence seat 8 are matched and located by adopting a hole shaft, so that the laser incidence hole 37 of the laser incidence seat 8 is ensured to be coaxial with the optical cable locating sleeve 5, namely, the laser incidence hole is coaxial with the incidence optical axis of the laser output optical cable 1 head. Meanwhile, the front structure of the laser entrance hole 37 of the laser entrance seat 8 is provided with a small-caliber diaphragm, and the tail structure is in a horn mouth diffusion shape according to the divergence angle delta of incident light.
The laser detector consists of a photoelectric sensor 9 and a photoelectric sensor mounting sleeve 10 and is mounted on a detection hole on the side surface of the laser incidence seat 8. When the laser outputs light from the head of the optical cable 1, the photoelectric sensor 9 can detect the dissipated light and feed the light back to the copying control assembly to serve as a reference condition for intelligent copying control.
The protective mirror suite consists of a mirror support 11, a protective mirror 14, a flood plug seal 13 and a mirror cover 12 and is arranged at the rear part of the laser incidence seat 8; the protective mirror 14 is pressed and attached in the protective mirror 14 mounting stepped hole of the mirror support 11 through the deformation of the flood seal 13 between the mirror cover 12 and the protective mirror 14, and the protective mirror 14 is cooled by the second cooling water channel of the mirror support 11.
The laser energy absorbing assembly is mounted at the rear of the laser incidence and isolation assembly and comprises an anti-reflection diaphragm 17, an absorber 18, a conical reflector 19 and a housing 20. An anti-reflection diaphragm 17 is mounted at the front of the housing 20. The absorber 18 is mounted inside the housing 20. A conical reflector 19 is mounted behind the absorber 18.
The copying machine control component is arranged at the upper part of the laser energy absorbing component and consists of a control cabinet 23. The control cabinet 23 is internally provided with a power supply conversion circuit board 24, a laser signal acquisition and control circuit board 25 and a copying device signal acquisition and control circuit board 26; and a power interface 29 and a switch 30 which are arranged on the surface of the control cabinet 23, an upper computer communication interface 28, a laser communication interface 28, a copying device signal acquisition interface 31, an alarm signal lamp 32 and an alarm buzzer. The copying control component has the functions of monitoring laser state signals, monitoring copying device state signals, controlling the laser, controlling the upper computer on line and simulating CNC.
The embodiment aims to overcome the defects of the traditional copying device, and provides a novel copying device for a high-power optical fiber laser, which can effectively reduce the damage condition of an output optical cable window in the copying process, simulate the running state of the laser under the actual condition and perform intelligent control.
The copying device uses the output optical cable locating sleeve 5 matched with different output optical cable designs, can utilize the dustproof cover on the output optical cable to press on the end face of the protective sleeve of the output optical cable, and isolates the area where the window of the output optical cable is located from the external environment. The copying control component has the function of simulating CNC, namely the ratio combination of an on/off signal of laser, a continuous/pulse mode signal of light emission, a frequency value of pulse, a duty ratio value of pulse and a magnitude value of light emission power is arranged on the laser.
When the copying device works, the output optical cable head and the area where the window of the laser device is positioned are isolated from the area where the laser output optical cable 1 head is positioned, the rear energy absorption area and the external area by means of the matching seal between the optical cable locating sleeve 5 and the dustproof cover on the laser output optical cable 1 head, the sealing effect of the flood plug seal 13 between the mirror cover 12 and the protective mirror 14, the sealing effect of the O-shaped sealing ring in the O-ring mounting groove arranged between the mirror support 11 and the anti-reflection diaphragm 17 and the sealing effect of the foam sealing gasket 15 arranged in the mirror support 11 sinking table, so that a cleaner working environment is provided for the output optical cable window mirror.
In the process of copying, external dust, dust volatilized during copying on an energy reflecting surface and an absorbing surface of the copying device, and impurities enter the area where the output optical cable window is located and are sintered on the output optical cable window by laser, so that the output optical cable window is damaged. Therefore, only the protective mirror 14 needs to be cleaned or replaced regularly, the loss of the protective mirror 14 can be used for replacing the loss of the laser output optical cable head, and the production and manufacturing cost of the laser is reduced.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The utility model provides a laser instrument copy machine device, includes laser incident seat, its characterized in that still includes: a protective mirror assembly and a laser absorbing assembly; a laser input hole is arranged in the laser incidence seat in a penetrating manner from the first end to the second end, and a window of a laser output optical cable is inserted into the laser input hole at the first end of the laser incidence seat and is coaxially arranged with the laser input hole;
the second end of the laser incidence seat is connected with the laser absorption assembly;
the protective lens suite comprises a protective lens which is perpendicular to the laser incidence hole; and the protective mirror covers the cross section of the laser incidence hole at the position where the protective mirror is arranged and is in sealing connection with the laser incidence seat.
2. The laser copying apparatus according to claim 1, wherein said laser light absorbing assembly comprises an absorber and a conical reflector; the absorber is of a cylindrical structure with two open ends, a blackening coating is arranged on the inner surface of the absorber, and the cross-sectional area of the absorber is larger than that of the laser entrance hole;
the first end of the absorber is detachably and fixedly connected with the second end of the laser incidence seat, the conical surface reflector is arranged inside the second end of the absorber, the conical surface faces the laser incidence hole, the bottom of the conical surface reflector is connected with a bottom plate, and the bottom plate is detachably and hermetically connected with the second end of the absorber.
3. The laser copying apparatus according to claim 2, wherein a tapered surface of said tapered reflector has a concave structure; the conical surface reflector and the laser incident hole are eccentrically arranged.
4. The laser copying apparatus according to claim 2, wherein said laser absorbing assembly further comprises a housing; the shell is of a cylindrical structure with an opening at a first end, and is sleeved on the outer side of the absorber, and the first end of the shell is detachably connected with the second end of the laser incidence seat or the first end of the absorber;
the outer surface of the absorber is provided with a thread structure, the inner surface of the shell is in contact with the thread structure, and a first cooling water channel is formed between the shell and the absorber; a water inlet is formed in the end face of the second end of the shell, and a water outlet is formed in the side wall of the first end of the shell;
and a conical hole communicated with the first cooling water channel is formed in the conical reflector.
5. The laser copying apparatus according to any one of claims 1 to 4, wherein said laser entrance hole is divided into a cylindrical section and a divergent section in this order from a first end to a second end of said laser entrance seat so that light emitted from the laser can pass through said laser entrance hole;
a first diaphragm is arranged at the laser incidence hole at the first end of the laser incidence seat, and an anti-reflection diaphragm is arranged between the second end of the laser incidence seat and the laser absorption assembly;
the middle through hole of the anti-reflection diaphragm and the laser entrance hole are coaxially arranged and gradually expanded in shape and are matched with light rays emitted by the laser.
6. The laser printer apparatus of any one of claims 1 to 4, wherein the protective mirror assembly further comprises a mirror mount and a mirror cover; the lens support is provided with a stepped hole, and the stepped hole is divided into a first hole section, a second hole section and a third hole section which are sequentially connected from one side to the other side of the lens support and gradually reduced in aperture;
the protective mirror is placed in the second hole section, the mirror cover is annular and is detachably connected with the end part of the second hole section in the first hole section, and a plug seal is arranged between the mirror cover and the protective mirror;
a slot is formed in the laser incidence seat and perpendicular to the laser incidence hole, the lens holder is inserted into the slot so that the section of the laser incidence hole is vertically covered by the protective lens, and the lens cover faces the window; sealing gaskets are arranged in the grooves and between the surface of the lens holder and the groove wall; the lens support is detachably connected with the laser incidence seat.
7. The laser copying apparatus according to claim 4, further comprising: a positioning assembly for the laser output optical cable; the positioning assembly comprises an optical cable positioning sleeve; the optical cable locating sleeve is detachably connected with the first end of the laser incidence seat, the optical cable locating sleeve is sleeved outside the laser output optical cable close to the window end, the inner locating hole is coaxially arranged with the laser incidence hole, and the shape and the size of the locating hole are adapted to the outer surface of the laser output optical cable close to the window end.
8. The laser copying apparatus of claim 7, wherein said positioning assembly further comprises: a clamping member and a mounting bracket; the mounting frame is fixedly connected with the first end of the laser incidence seat, and the clamping piece is arranged on the mounting frame in an adjustable manner along the length direction of the laser output optical cable; the clamping piece is in a V shape, a U shape or a Y shape and is used for clamping and fixing the laser output optical cable; the inner surface of the clamping piece is provided with a flexible cushion layer.
9. The laser copying apparatus according to claim 7, wherein the outer surface of said optical cable positioning sleeve is provided with heat radiating fins;
the optical cable locating sleeve is provided with a locating screw, and the locating screw passes through the optical cable locating sleeve along the direction perpendicular to the laser output optical cable and abuts against the laser output optical cable;
thermistors are respectively arranged on the surface of the optical cable positioning sleeve and the end face of the shell;
and a second cooling water channel is arranged in the laser incidence seat.
10. A laser copying apparatus according to any one of claims 1 to 4, further comprising: a laser detector and a detection hole; the detection hole is perpendicular to the laser incidence hole and is communicated with the laser incidence hole and the outside of the laser incidence seat at one side of the laser incidence hole, and the laser detector is arranged in the detection hole.
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| CN201910279740.6A CN109861063B (en) | 2019-04-09 | 2019-04-09 | Laser copying device |
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| CN201910279740.6A CN109861063B (en) | 2019-04-09 | 2019-04-09 | Laser copying device |
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| CN113835310A (en) * | 2021-09-29 | 2021-12-24 | 深圳市先地图像科技有限公司 | Diaphragm and laser |
| CN113916500B (en) * | 2021-12-14 | 2022-03-08 | 武汉锐科光纤激光技术股份有限公司 | Laser copying device and test method |
| CN113916501B (en) * | 2021-12-14 | 2022-03-08 | 武汉锐科光纤激光技术股份有限公司 | Laser copying device and test method |
| CN114779411B (en) * | 2022-03-23 | 2023-08-01 | 武汉锐科光纤激光技术股份有限公司 | Laser transmission optical cable |
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