CN212652876U

CN212652876U - Laser welding head

Info

Publication number: CN212652876U
Application number: CN202021303473.6U
Authority: CN
Inventors: 何瑞东; 苏翠云; 彭文齐; 王玉强; 王志伟
Original assignee: Shenzhen Hero Laser Equipment Co ltd
Current assignee: Shenzhen Hero Laser Equipment Co ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-03-05
Anticipated expiration: 2030-07-03

Abstract

The utility model discloses a laser welder head, laser welder head includes: the device comprises a device body and a lens protection mechanism, wherein the device body is provided with a laser emergent port, the lens protection mechanism is connected with the device body and seals the laser emergent port, the lens protection mechanism comprises a protection lens, the central axis of the protection lens is not collinear with the central axis of the laser emergent port, and welding light rays are emitted along the central axis of the laser emergent port and penetrate through the protection lens to be emitted to a workpiece. The utility model discloses technical scheme aims at prolonging the life of protection lens, reduces the loss rate of protection lens, reduction in production cost.

Description

Laser welding head

Technical Field

The utility model relates to a laser beam machining technical field, in particular to laser welding head.

Background

Laser welding is an advanced welding technology, takes laser beams as energy sources, and has the advantages of accurate welding position, no pollution and the like. When the laser welding head welds a workpiece, a laser beam carries heat and passes through a laser exit port and is focused on the surface of the workpiece to be welded, so that the material on the surface of the workpiece is melted, and meanwhile, a large amount of gas, slag and splashes are released. In order to prevent the damage of the lens element by the gas, therefore, it is necessary to provide a protective lens in the laser welding head to prevent the gas or spatter from entering the inside of the laser cleaning head through the laser exit port to protect the optical element. However, in the related art, the laser beam is directly emitted through the center of the protective lens, and when the center of the protective lens is burned out, although the periphery of the lens remains intact, the light transmittance at the center of the burned protective lens is reduced, so that the entire protective lens cannot be used, and at this time, the protective lens must be replaced. The structure ensures that the protective lens can be used only once, and has short service life and quick loss, thus leading to high production cost.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a laser welder head aims at prolonging the life of protection lens, reduces the loss rate of protection lens, reduction in production cost.

In order to achieve the above object, the utility model provides a laser welder head, laser welder head includes: the laser emission device comprises a device body, a laser emission device and a laser emission device, wherein the device body is provided with a laser emission port; and

the lens protection mechanism is connected with the device main body and seals the laser emergent port, the lens protection mechanism comprises a protection lens, the central axis of the protection lens is not collinear with the central axis of the laser emergent port, and welding light rays are emitted along the central axis of the laser emergent port and penetrate through the protection lens to be emitted to a workpiece.

In an embodiment of the present invention, the lens protection mechanism includes:

the installation shell, the installation shell with the device main part is connected, the inside of installation shell is formed with and holds the chamber, the installation shell still is equipped with the intercommunication the income light mouth and the light-emitting window that hold the chamber, go into the light mouth with the axis of light-emitting window with the axis collineation setting of laser emitting window, just go into the light mouth with laser emitting window intercommunication, the protection lens can be dismantled and locate hold the intracavity, and be located go into the light mouth with between the light-emitting window.

In an embodiment of the present invention, the mounting case includes:

the base is provided with the light outlet; and

the cover body is detachably connected with the base, the cover body and the base are enclosed to form the accommodating cavity, the cover body is provided with the light inlet, and the cover body is detachably connected with the device main body.

The utility model discloses an in one embodiment, the base is equipped with the intercommunication hold the mouth of stepping down of chamber, camera lens protection mechanism still includes the microscope base, the microscope base is relative but the setting of base pull, so that at least part via of microscope base let the mouth stretch into to hold the intracavity, the microscope base is equipped with the fixed slot, the tank bottom wall of fixed slot is equipped with first light mouth of crossing, the axis of first light mouth of crossing with go into the axis collineation of light mouth, first light mouth of crossing with fixed slot eccentric settings, the protection lens is fixed in the fixed slot, just the axis of protection lens with the axis collineation of fixed slot.

In an embodiment of the present invention, the lens protection mechanism further includes a handle, the handle is connected to the lens holder, and the handle is located outside the accommodating cavity.

In an embodiment of the present invention, the lens protection mechanism further includes a first sealing member, the first sealing member surrounds the first light passing opening, and is clamped between the protection lens and the base.

The utility model discloses an in one embodiment, the camera lens protection subassembly is still including compressing tightly the piece, compress tightly the piece with be fixed in the microscope base, and will the protection lens compress tightly in the fixed slot.

The utility model discloses an in the embodiment, the concave spacing groove that is equipped with of lateral wall of fixed slot, the spacing groove with the fixed slot intercommunication, it is including cyclic annular main part and stopper to compress tightly the piece, the stopper connect in the outer loop wall of cyclic annular main part, the stopper is inserted and is located the spacing groove, with the restriction it is relative to compress tightly the piece the microscope base rotates.

In an embodiment of the present invention, the pressing member deviates from a concave mounting groove formed on a surface of the protection lens, the lens protection mechanism further includes a second sealing member, at least a portion of the second sealing member is fixed in the mounting groove, and the second sealing member abuts against the cover body.

In an embodiment of the present invention, the laser welding head further includes a gas protection mechanism, the gas protection mechanism is far away from the lens protection mechanism the surface of the laser emitting port is connected, the gas protection mechanism is provided with a second light passing port, a central axis of the second light passing port is arranged in a collinear manner with the central axis of the laser emitting port.

The utility model discloses technical scheme's laser welder head is including the device main part and the camera lens protection mechanism that are connected. The device body is internally provided with a lens assembly, and the lens assembly is used for forming welding light and emitting laser light from an emergent port. The lens protection mechanism may seal the laser exit port to prevent gas generated by welding from entering the device body through the laser exit port to damage a lens component provided in the device body. Because the lens protection mechanism is provided with the protective lens, welding light can penetrate through the protective lens and irradiate to a workpiece to be welded. Because the central axis of the protective lens and the central axis of the laser exit are arranged in a non-collinear way, when the welding light penetrates through the protective lens, the welding light does not pass through the center of the protective lens, but passes through the position eccentric relative to the protective lens. When the protective lens is burnt black and burnt out by welding light, the protective lens can be moved, other positions of the protective lens which are not burnt out are moved to the position where the welding light passes through, the function of the protective lens is continuously realized, and the operation is repeated for a plurality of times until other positions of the whole protective lens are burnt out.

Compared with the prior art, the utility model discloses an among the technical scheme because welding light passes from the center of protective glass piece not, consequently, after one of them is burned out at protective glass piece, can also shift the position that passes of welding light again with other positions that are not burned out of protective glass piece, so that protective glass piece can used repeatedly many times, so, the luminousness of protective glass piece has both been guaranteed, protective glass piece used repeatedly's number of times is increased again, protective glass piece life has been prolonged promptly, the loss rate of protective glass piece has been reduced, and production cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of a laser welding head according to the present invention;

FIG. 2 is an exploded view of the laser welding head of FIG. 1;

fig. 3 is a schematic structural diagram of an embodiment of a lens protection mechanism in a laser welding head according to the present invention;

fig. 4 is an exploded view of the lens protection mechanism of fig. 3.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Laser welding head	3311	Limiting groove
10	Device body	333	First light passing port
				11	Laser exit	34	Handle bar
30	Lens protection mechanism	35	Compressing member
				31	Mounting shell	351	Ring-shaped body
311	Cover body	353	Limiting block
				3111	Light inlet	355	Mounting groove
313	Base seat	36	First seal member
				3131	Light outlet	37	Second seal
3133	Let a mouthful	50	Gas protection mechanism
				32	Protective lens	51	Air pump
33	Mirror base	53	Air tap
				331	Fixing groove	531	Second light passing port

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "second" and the like are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicit to the technical features indicated. Thus, a feature defined as "a" or "a second" can explicitly or implicitly include at least one of the feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a laser welder head 100.

Referring to fig. 1 to 4, in an embodiment of the present invention, the laser welding head 100 includes: a device body 10, the device body 10 being provided with a laser exit port 11; and

the lens protection mechanism 30 is connected with the device body 10 and seals the laser exit 11, the lens protection mechanism 30 includes a protection lens 32, a central axis of the protection lens 32 is not collinear with a central axis of the laser exit 11, and the welding light is emitted along the central axis of the laser exit 11 and penetrates through the protection lens 32 to be emitted to a workpiece.

The laser welding head 100 according to the present invention includes a device body 10 and a lens protection mechanism 30 connected to each other. A lens assembly is arranged in the device body 10, and the lens assembly is used for forming welding light and emitting laser light from the light emitting port 11. The lens protection mechanism 30 may seal the laser exit port 11 to prevent gas generated by welding from entering the device body 10 through the laser exit port 11 to damage a lens component provided in the device body 10. Since the lens protection mechanism 30 is provided with the protection lens 32, the welding light can be transmitted through the protection lens and directed to the workpiece to be welded. Since the central axis of the protective lens 32 is not collinear with the central axis of the laser exit port 11, when the welding light passes through the protective lens, the welding light does not pass through the center of the protective lens 32, but passes through a position eccentric with respect to the protective lens 32. When the protection lens 32 is burned out and burned out by the welding light, the protection lens 32 may be moved, so that other positions of the protection lens 32 which are not burned out are moved to the position where the welding light passes through, and the function of the protection lens 32 is continuously realized, and the above operation is repeated for a plurality of times until the rest positions of the whole protection lens 32 are burned out. Compared with the prior art, the utility model discloses an among the technical scheme because welding light passes from the center of protection lens 32 not, consequently, after one of them of protection lens 32 is burnt out, can also shift the position of passing of welding light again with the position that other of protection lens 32 are not burnt out, so that protection lens 32 can used repeatedly many times, so, both guaranteed protection lens 32's luminousness, increase protection lens 32 used repeatedly's number of times again, protection lens 32 life has been prolonged promptly, the loss rate of protection lens 32 has been reduced, and production cost is reduced.

It should be noted that, according to many times experiment show, the utility model discloses practical 4 ~ 8 times can be repeated to protection lens 32 among the technical scheme for protection lens 32's life has prolonged 4 ~ 8 times, the loss rate of protection lens 32 that has significantly reduced. The device body 10 includes a housing, an installation space (not shown) is formed inside the housing, and a lens unit (not shown) is provided in the installation space. Specifically, the lens assembly includes a collimator lens (not shown), a reflector lens (not shown), a galvanometer lens (not shown), a field lens (not shown), and the like, which are sequentially arranged along the propagation direction of the optical path, wherein the field lens is arranged near the laser exit port 11. The laser welding head 100 is connected to a laser generator (not shown) via an optical fiber, and an optical signal of the laser generator is inputted into the device body 10 of the laser welding head 100, and a series of processes by a lens assembly form a welding light beam, which is emitted through a laser exit port 11. The lens protection mechanism 30 is connected to a housing in the apparatus body 10. It should be noted that the lens protection mechanism 30 and the housing may be detachably connected by a connector such as a screw.

Referring to fig. 2 to 4, in an embodiment of the present invention, the lens protection mechanism 30 includes:

installation shell 31, installation shell 31 with device main part 10 is connected, the inside of installation shell 31 is formed with and holds the chamber, installation shell 31 still is equipped with the intercommunication the income light mouth 3111 and the light-emitting window 3131 that hold the chamber, go into light mouth 3111 with the axis of light-emitting window 3131 with the axis collineation setting of laser emergent window 11, just go into light mouth 3111 with laser emergent window 11 intercommunication, protection lens 32 can be dismantled and locate hold the intracavity, and be located go into light mouth 3111 with between the light-emitting window 3131.

In an embodiment of the present invention, the mounting shell 31 includes a base 313 and a cover 311 that are detachably connected. The cover 311 and the base 313 enclose a cavity for accommodating the protection lens 32, the base 313 is provided with a light outlet 3131, the cover 311 is provided with a light inlet 3111, and the central axes of the light inlet 3111, the light outlet 3131 and the laser exit port 11 are overlapped, so that the welding light is emitted along the central axes of the laser exit port 11, the light inlet 3111 and the light exit port 3131 in sequence. It should be noted that the protection lens 32 is detachably disposed between the light inlet 3111 and the light outlet 3131 to facilitate replacement of a new protection lens 32 after the protection lens 32 is completely damaged. Therefore, by providing the mounting case 31 in a structure including the base 313 and the cover 311 detachably connected, it is possible to facilitate mounting and dismounting of the protective lens 32 and other components in the cavity, and improve the replacement efficiency of the protective lens 32. It is understood that the base 313 and the cover 311 may be detachably connected by screws or by snaps, which is not limited herein. It is understood that the cover 311 and the housing can be detachably connected between the mounting shell 31 and the device body 10 by screws or snaps, which will not be described in detail herein.

Referring to fig. 4, in an embodiment of the present invention, the base 313 is equipped with the intercommunication the mouth of stepping down 3133 that holds the chamber, the lens protection mechanism 30 further includes the microscope base 33, the microscope base 33 is relative but base 313 pull setting, so that at least part of microscope base 33 via the mouth of stepping down 3133 stretches into hold the intracavity, the microscope base 33 is equipped with the fixed slot 331, the tank bottom wall of fixed slot 331 is equipped with first light mouth 333 of crossing, the axis of first light mouth 333 of crossing with go into the axis collineation of light mouth 3111, first light mouth 333 with fixed slot 331 eccentric settings, protection lens 32 is fixed in the fixed slot 331, just the axis of protection lens 32 with the axis collineation of fixed slot 331.

The utility model relates to an among the technical scheme of an embodiment, through being provided with on base 313 and letting position mouth 3133, and set up microscope base 33 to the drawable structure of relative base 313, when needs change protection lens 32, only need pull out microscope base 33 from base 313, and can show protection lens 32 in the outside that holds the chamber, so, need not clap and dismantle installation shell 31 and just can realize adjusting the relative position between protection lens 32 and the microscope base 33, also can realize the change to protection lens 32 simultaneously, further promote protection lens 32's removal and change efficiency, and then promote the machining efficiency to the work piece. It should be noted that the shape of the fixing groove 331 is adapted to the shape of the protection lens 32, the central axis of the fixing groove 331 coincides with the central axis of the protection lens 32, and the fixing stability of the protection lens 32 is improved by setting the fixing groove 331 to have the same shape as the protection lens 32. The central axis of the first light passing port 333 is overlapped with the central axes of the light entrance port 3111 and the light exit port 3131, and the protective lens 32 can cover the entire first light passing port 333.

Referring to fig. 2 to 4, in an embodiment of the present invention, the lens protection mechanism 30 further includes a handle 34, the handle 34 is connected to the lens holder 33, and the handle 34 is located outside the accommodating cavity.

In the technical solution of an embodiment of the present invention, the shape of the handle 34 is not limited, as long as it is convenient

The operator can apply a force, and the lens holder 33 can be pulled out from the mounting case 31. It is understood that the handle 34 may be an integral structure with the mirror base 33, or may be a structure detachably connected with the mirror base 33, and is not limited herein.

Referring to fig. 4, in an embodiment of the present invention, the lens protection mechanism 30 further includes a first sealing member 36, and the first sealing member 36 is disposed around the first light passing port 333 and is sandwiched between the protection lens 32 and the base 313.

The utility model discloses an among the technical scheme of an embodiment, first sealing member 36 encircles on locating the side wall surface of first light mouth 333 that crosses, and first sealing member 36 has good elasticity, and protection lens 32 can extrude first sealing washer for first sealing washer and base 313 butt, in order to realize sealing the protection lens, prevent that the gas that the welding produced from passing protection lens 32 and entering into and go into in the device main part 10 of light mouth 3111 intercommunication. The material of the first sealing member 36 may be a plug seal, or may be other material having good heat resistance, and is not limited herein. The first sealing member 36 has good heat resistance and sealing reliability.

Referring to fig. 4, in an embodiment of the present invention, the lens protection assembly further includes a pressing member 35, the pressing member 35 is fixed to the lens holder 33, and presses the protection lens 32 in the fixing groove 331.

The utility model relates to an among the technical scheme of an embodiment, the material that compresses tightly piece 35 is the metal material for compress tightly 35 basis weight, in order to reach good effect that compresses tightly. In some embodiments, a limit groove 3311 is concavely disposed on a sidewall of the fixing groove 331, the limit groove 3311 is communicated with the fixing groove 331, the pressing member 35 includes an annular main body 351 and a limit block 353, the limit block 353 is connected to an outer annular wall surface of the annular main body 351, and the limit block 353 is inserted in the limit groove 3311 to limit the pressing member 35 to rotate relative to the mirror base 33, so as to ensure a pressing effect of the pressing member 35 on the protection lens 32. Wherein, stopper 353 and annular main body 351 are an organic whole structure for pressing member 35 has good intensity.

Referring to fig. 4, in an embodiment of the present invention, a mounting groove 355 is recessed on a surface of the pressing member 35 facing away from the protection lens 32, and the lens protection mechanism 30 further includes a second sealing member 37, at least a portion of the second sealing member 37 is fixed in the mounting groove 355 and abuts against the cover 311.

The utility model discloses an among the technical scheme of an embodiment, be provided with mounting groove 355 through the surface that compresses tightly piece 35, can improve the fixed reliability of second sealing member 37. The second sealing member 37 abuts on the cover 311, and the sealing performance of the lens protection mechanism 30 can be further improved, so that gas is prevented from entering the apparatus main body 10 through the light inlet 3111, and the reliability of the lens protection mechanism can be further improved. The material of the second sealing element 37 may be teflon, which is commonly referred to as teflon. Polytetrafluoroethylene (PTFE, abbreviated as PTFE) is commonly known as "plastic king" and is a polymer prepared by polymerizing tetrafluoroethylene as a monomer. The wax-like white transparent glass is white wax-like and semitransparent, has good heat resistance and cold resistance, and can be used for a long time at minus 180-260 ℃.

Referring to fig. 1 and 2, in an embodiment of the present invention, the laser welding head 100 further includes a gas protection mechanism 50, the gas protection mechanism 50 and the lens protection mechanism 30 are far away from the surface connection of the laser exit 11, the gas protection mechanism 50 is provided with a second light passing port 531, a central axis of the second light passing port 531 and a central axis collineation setting of the laser exit 11.

The utility model relates to an among the technical scheme of an embodiment, gas protection mechanism 50 is connected with the air supply for to treating the protective gas such as welded work piece delivery helium, prevent that the work piece from being by the oxidation when high temperature welding. Specifically, the gas guard mechanism 50 includes a gas cylinder 51 and a gas nipple 53 connected, and the gas nipple 53 is provided with a gas hole formed as a second light passing port 531. The air cylinder 51 is a cylindrical structure with two open ends, and the inner diameter of the air cylinder 51 decreases from the light outlet 3131 to the air tap 53, so that the air has a converging effect when being sent out of the second light passing port 531, and the protection effect on the workpiece can be further improved.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A laser welding head, comprising:

the laser emission device comprises a device body, a laser emission device and a laser emission device, wherein the device body is provided with a laser emission port; and

2. The laser welding head of claim 1 wherein the lens protection mechanism comprises:

3. The laser welding head of claim 2 wherein the mounting housing comprises:

the base is provided with the light outlet; and

4. The laser welding head of claim 3 wherein the base has a relief opening communicating with the receiving cavity, the lens protection mechanism further comprises a lens holder, the lens holder is drawably disposed with respect to the base so that at least a portion of the lens holder extends into the receiving cavity through the relief opening, the lens holder has a fixing groove, a first light passing opening is disposed on a bottom wall of the fixing groove, a central axis of the first light passing opening is collinear with a central axis of the light entering opening, the first light passing opening is eccentrically disposed with the central axis of the fixing groove, the protection lens is fixed in the fixing groove, and the central axis of the protection lens is collinear with the central axis of the fixing groove.

5. The laser welding head of claim 4 wherein the lens protection mechanism further comprises a handle connected to the mirror mount, the handle being located outside the receiving cavity.

6. The laser welding head of claim 4 wherein the lens protection mechanism further comprises a first seal disposed around the first light admission port and sandwiched between the protective lens and the base.

7. The laser welding head of claim 5 wherein the lens protection assembly further comprises a compression member secured to the mirror mount and compressing the protective lens in the securing groove.

8. The laser welding head of claim 7 wherein the sidewall of the retaining groove is recessed with a retaining groove, the retaining groove is in communication with the retaining groove, the clamping member includes an annular body and a retaining block, the retaining block is connected to the outer annular wall of the annular body, and the retaining block is inserted into the retaining groove to limit the clamping member from rotating relative to the mirror base.

9. The laser welding head of claim 7 wherein a surface of the hold down element facing away from the protective lens is recessed with a mounting groove, the lens protection mechanism further comprising a second sealing element, at least a portion of the second sealing element being secured within the mounting groove and abutting the cover body.

10. The laser welding head according to any one of the claims 1 to 9 further comprising a gas shielding mechanism connected to a surface of the lens shielding mechanism remote from the laser exit port, the gas shielding mechanism being provided with a second light passing port having a central axis collinear with a central axis of the laser exit port.