CN111215750A

CN111215750A - Laser wire feeding welding machine

Info

Publication number: CN111215750A
Application number: CN201911413140.0A
Authority: CN
Inventors: 陈绵著
Original assignee: Guangzhou Hanma Automation Control Equipment Co ltd
Current assignee: Guangzhou Hanma Automation Control Equipment Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-06-02

Abstract

The invention provides a laser wire feeding welding machine, and belongs to the field of welding equipment. It includes laser welder head main part, optical fiber head and optic fibre cable, and the below of laser welder head main part is provided with outer tube fixing base behind outer tube fixing base and the welding wire before the welding wire, is provided with the cell body behind the welding wire on the outer tube fixing base, is provided with laser shift knob and spring in the cell body, sets up the switch on this cell body and pulls the knot mechanism, and the switch is pulled the knot mechanism and is detained body, switching post and spacing post including pulling, the switching post with the switching hole rotates to be connected, pulls and detains this internal welding wire passageway that is provided with, and welding wire passageway internal fixation has the swing sleeve pipe, switching post and spacing post set up in the both sides of welding wire passageway, be provided with the. Compared with the prior art, the structure can effectively avoid bonding of the welding wire and the molten pool after welding, has the advantages of accurate positioning and expandable molten pool, and has the characteristic of high welding efficiency.

Description

Laser wire feeding welding machine

Technical Field

The invention belongs to the field of welding equipment, and particularly relates to a laser wire feeding welding machine.

Background

Laser welding is an efficient precision welding method using a laser beam with high energy density as a heat source. Laser welding is one of the important aspects of the application of laser material processing techniques. The 20 th century and the 70 th century are mainly used for welding thin-wall materials and low-speed welding, and the welding process belongs to a heat conduction type, namely, the surface of a workpiece is heated by laser radiation, the surface heat is diffused inwards through heat conduction, and the workpiece is melted to form a specific molten pool by controlling parameters such as the width, the energy, the peak power, the repetition frequency and the like of laser pulses. Due to the unique advantages, the welding method is successfully applied to the precise welding of micro and small parts.

The existing laser welding is characterized in that a welding wire machine is utilized to feed wires to align to a workpiece to be welded, a welding gun performs laser heating on the welding wires to form a molten pool, and then the workpiece is welded. In view of this, the present invention provides a laser wire feeder welder.

Disclosure of Invention

In order to solve the problems, the invention provides a laser wire feeding welding machine, which adopts an optimized design, can effectively avoid the bonding of the welding machine and a molten pool after welding, has the advantages of accurate positioning and expandable molten pool, and has the characteristic of high welding efficiency.

The invention is realized by the following technical scheme:

a laser wire feeding welding machine comprises a laser welding head main body, an optical fiber head and an optical fiber cable, wherein the optical fiber cable is fixedly spliced with the laser welding head main body through the optical fiber head, a welding wire front outer tube fixing seat and a welding wire rear outer tube fixing seat are arranged below the laser welding head main body, a welding wire front outer tube is fixed on the welding wire front outer tube fixing seat, a welding wire rear outer tube is fixed on the welding wire rear outer tube fixing seat, a welding wire soft outer tube is sleeved on the welding wire rear outer tube, a groove body is arranged on the welding wire rear outer tube fixing seat, a laser switch button and a spring are arranged in the groove body, a switching hole is formed in the groove body, a switch pulling and buckling mechanism is rotatably connected to the switching hole and comprises a pulling and buckling body, a switching column and a limiting column, the switching column is rotatably connected to the switching hole, a welding wire, the welding wire passageway internal fixation has the swing sleeve pipe, switching post and spacing post set up in the both sides of welding wire passageway, be provided with the welding wire in outer tube before outer tube, swing sleeve pipe and the welding wire behind the welding wire.

As an optimal technical scheme, the front end of the laser welding main body is provided with an installation groove, a positioning tungsten tip is fixedly connected to the installation groove, and a welding wire through hole is formed in the positioning tungsten tip.

As a preferred technical scheme, the laser welding head main body comprises a shell, a laser channel is arranged in the shell, a reflector module is arranged at a corner of the shell, a rotating motor, a focusing mirror module and a protective mirror module are further arranged in the laser channel, and the focusing mirror module is connected with the rotating motor.

As a preferred technical scheme, the mirror module comprises a mirror fixing block and a mirror, the mirror fixing block is fixedly connected with the housing, and the mirror is arranged on the mirror fixing block.

As a preferred technical scheme, the shell is further provided with an embedding groove, and the protective glass module is embedded into the embedding groove and fixedly connected with the shell.

As a preferred technical scheme, the rotating motor comprises a motor main body and a rotating shaft, the rotating shaft is a hollow rotating shaft, the focusing lens module comprises a pressing ring, a first gasket, a focusing lens, a second gasket and a focusing lens barrel, the first gasket, the focusing lens and the second gasket are sequentially arranged in the focusing lens barrel and are limited by the pressing ring, the pressing ring is fixedly connected with the focusing lens barrel, and the focusing lens barrel is connected with the hollow rotating shaft.

As a preferred technical solution, the focusing lens is obliquely arranged relative to the focusing lens barrel, and an included angle is formed between a central line of the focusing lens and a central line of the focusing lens barrel.

Has the advantages that:

according to the invention, through the structural arrangement of the switch toggle mechanism, the swing sleeve and the laser switch button, the welding wire can be prevented from being adhered to a molten pool after welding is finished, and the welding wire can be timely pulled out of the molten pool when welding is stopped.

Drawings

FIG. 1 is an exploded view of a laser wire feeder welder;

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

FIG. 3 is a structural assembly view of a laser wire feed weld;

FIG. 4 is a cross-sectional view of a laser wire feeder welder;

FIG. 5 is a schematic structural view of the outer tube fixing seat after welding;

FIG. 6 is a perspective view of the outer front tube of the welding wire and the switch trigger structure;

FIG. 7 is a cross-sectional view of the fiber tip and laser welding head body;

FIG. 8 is a detailed block diagram of the rotary motor and focusing mirror module of FIG. 7;

FIG. 9 is a schematic structural view of an included angle A formed between a central line B of the focusing lens and a central line C of the focusing lens barrel;

FIG. 10 is a schematic diagram of the laser after deflection;

FIG. 11 is a schematic view of the laser shifting in the other direction after the rotation of the rotary motor;

FIG. 12 is a schematic view of the principle that the light spot moves to form an equivalent large light spot after the rotating motor rotates;

fig. 13 is a schematic structural diagram of a second embodiment of positioning a tungsten tip.

The attached drawings are as follows:

1. an optical fiber cable; 2. an optical fiber head; 3. a laser welding head body; 4. the welding wire front outer tube fixing seat; 5. the welding wire rear outer tube is fixed on the base; 6. an outer front welding wire tube; 7. a rear outer tube for welding wires; 8. a welding wire soft outer tube; 9. a trough body; 10. a laser switch button; 11. a spring; 12. switching the hole; 13. a switch toggle mechanism; 14. a wrench body; 15. a transfer column; 16. a limiting column; 17. a welding wire channel; 18. swinging the casing; 19. welding wires; 20. mounting grooves; 21. positioning a tungsten tip; 22. a welding wire through hole; 23. a housing; 24. a laser channel; 25. a mirror module; 26. a rotating electric machine; 27. a focusing mirror module; 28. a protective glass module; 29. a reflector fixing block; 30. a reflective mirror; 31. a motor main body; 32. a rotating shaft; 33. a compression ring; 34. a first gasket; 35. a focusing mirror; 36. a second gasket; 37. a focus lens barrel; 38. a U-shaped groove; 100. light spots; A. an included angle; B. the central line of the focusing mirror; C. the center line of the focus lens barrel.

Detailed Description

In order to further disclose and explain the technical scheme of the invention, a laser wire feeding welding machine is clearly and completely explained below by combining the attached drawings.

It should be noted that the terms "upper", "inner", "middle", "left", "right" and "one" used in the present specification are for clarity of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship between them are not essential to the technical contents, but are also regarded as the scope of the present invention.

Referring to the attached drawings 1 to 6, the invention provides a laser wire feeding welding machine, which comprises a laser welding head main body 3, an optical fiber head 2 and an optical fiber cable 1, wherein the optical fiber cable 1 is fixedly inserted into the laser welding head main body 3 through the optical fiber head 2, a welding wire front outer tube fixing seat 4 and a welding wire rear outer tube fixing seat 5 are arranged below the laser welding head main body 3, a welding wire front outer tube 6 is fixed on the welding wire front outer tube fixing seat 4, a welding wire rear outer tube 7 is fixed on the welding wire rear outer tube fixing seat 5, a welding wire soft outer tube 8 is sleeved on the welding wire rear outer tube fixing seat 5, a groove body 9 is arranged on the welding wire rear outer tube fixing seat 5, a laser switch button 10 and a spring 11 are arranged in the groove body 9, the laser switch button 10 can control the switch of laser and control the wire feeding machine to start or stop the wire feeding, the switch buckle mechanism 13 is rotatably connected to the switch hole 12, and it should be noted that, since the laser switch button 10 and the spring 11 are both disposed in the groove 9, and the switch buckle mechanism 13 is disposed on the groove 9, when the switch buckle mechanism 13 is pressed, the switch buckle mechanism 13 can be sunk into the groove 9 and abutted to the laser switch button 10, and when the switch buckle mechanism 13 is released, the switch buckle mechanism 13 can be bounced and reset due to the action of the spring 11, the switch buckle mechanism 13 includes a buckle body 14, a switching column 15 and a limiting column 16, the switching column 15 is rotatably connected to the switch hole 12, a welding wire channel 17 is disposed in the buckle body 14, a swing sleeve 18 is fixed in the welding wire channel 17, the switching column 15 and the limiting column 16 are disposed at two sides of the welding wire channel 17, and the outer tube 7 is rotatably connected to the welding wire rear end, Welding wire 19 is arranged in swing sleeve 18 and outer wire front tube 6.

In operation, referring to fig. 3, as the switch trigger mechanism 13 is pulled by the operator, the swinging sleeve 18 swings with the switch trigger mechanism 13, so that the swinging sleeve 18 advances forward, and the welding wire 19 advances forward, because the switch trigger mechanism 13 is in two states, i.e. the length of the welding wire 19 between the outlet of the swinging sleeve 18 and the inlet of the welding wire front outer tube 6 is shorter when the switch trigger mechanism 13 is pressed, and the length of the welding wire 19 between the outlet of the swinging sleeve 18 and the inlet of the welding wire front outer tube 6 is longer when the switch trigger mechanism 13 is loosened, so that the welding wire 19 advances forward toward the inner side of the welding wire front outer tube 6 when the switch trigger mechanism 13 is pressed, and the welding wire 19 is exposed at the front end of the welding wire front outer tube 6, when the switch trigger mechanism 13 touches the laser switch button 10 and presses the button to start laser, the welding wire 19 machine starts wire feeding at the same time, and enters a working state, and the welding wire 19 and a workpiece are fused together by the laser during working; when the welding is finished, as the operator releases the switch trip mechanism 13, the switch trip mechanism 13 is sprung open by the spring 11, when the switch trigger mechanism 13 leaves the laser switch button 10, the welding wire 19 stops feeding, but at this time, because the laser system is in the delayed off setting, when the laser switch button 10 is released, the laser is turned off in a delayed way to avoid cooling of the molten pool so as to avoid the welding wire 19 from being stuck on the molten pool, and as the switch trigger mechanism 13 continues to swing, the swing sleeve 18 simultaneously swings towards the outside of the groove body 9, as the length of welding wire 19 between the outlet of wobble sleeve 18 and the inlet of outer pipe 6 before the wire is gradually longer, therefore, the welding wire 19 also contracts inwards relative to the welding wire front outer tube 6, so that the front end of the welding wire 19 is pulled out of the molten pool and retracts to a non-working state, the laser is closed in a delayed mode, the laser is closed, and the welding process is completed, so that the welding wire 19 and the molten pool are prevented from being bonded together.

Positioning of tungsten tip 21 embodiment one:

specifically, referring to fig. 2 and 5, an installation groove 20 is formed at the front end of the laser welding main body, a positioning tungsten tip 21 is fixedly connected to the installation groove 20, and a welding wire through hole 22 is formed in the positioning tungsten tip 21. During the laser wire feeding welding, the distance between the laser focus and the welding line 19 must be within a certain range, so as to ensure the welding stability and the correct welding position, therefore, a positioning device is needed during the welding, the positioning tungsten tip 21 can meet the requirements, the positioning tungsten tip 21 is made of tungsten, the tungsten has the characteristics of high hardness and high melting point, the head of the positioning tungsten tip 21 is provided with a sharp corner, and the sharp corner can slide along the thin seam, thereby playing a positioning role during the welding, meanwhile, the welding wire through hole 22 is arranged at the sharp corner, so that the welding wire 19 can conveniently extend into the sharp corner, the welding process is generally flat plate edge joint welding, inner angle welding, outer angle welding and the like, during the work, the positions among the workpieces are well set, the relative positions of the workpieces can be fixed by spot welding at two or more positions, and the adoption of the mode can avoid that the base metal is propped open when the sharp corner of the positioning tungsten, and then welding, wherein the tip of the positioning tungsten tip 21 slides along the joint during welding, so that the welding head moves and welds at the same time, the position is accurate, and the welding effect is stable.

Positioning tungsten tip 21 embodiment two:

specifically, referring to fig. 13, an installation groove 20 is disposed at the front end of the positioning laser welding main body, a positioning tungsten tip 21 is fixed on the installation groove 20, and a U-shaped groove 38 is further disposed on the positioning tungsten tip 21; as can be seen from fig. 13, the welding wire 19 protrudes a little from the positioning tungsten tip 21, so that the welding wire 19 can be positioned by the positioning tungsten tip 21 and can contact the material to be welded, and the wire feeding speed of the wire feeder can be used as an aid to adjust the speed of hand movement during welding.

Specifically, referring to fig. 7, the laser welding head body 3 includes a housing 23, a laser channel 24 is disposed in the housing 23, a mirror module 25 is disposed at a corner of the housing 23, a rotating motor 26, a focusing mirror module 27 and a protection mirror module 28 are further disposed in the laser channel 24, and the focusing mirror module 27 is connected to the rotating motor 26.

Specifically, referring to fig. 2, the mirror module 25 includes a mirror fixing block 29 and a mirror 30, the mirror fixing block 29 is fixedly connected to the housing 23, and the mirror 30 is disposed on the mirror fixing block 29.

Specifically, a caulking groove is further formed in the housing 23, and the protective mirror module 28 is embedded in the caulking groove and fixedly connected with the housing 23.

Specifically, referring to fig. 8, the rotating motor 26 includes a motor main body 31 and a rotating shaft 32, the rotating shaft 32 is a hollow rotating shaft, the focusing lens module 27 includes a pressing ring 33, a first gasket 34, a focusing lens 35, a second gasket 36 and a focusing lens barrel 37, the first gasket 34, the focusing lens 35 and the second gasket 36 are sequentially disposed in the focusing lens barrel 37 and are limited by the pressing ring 33, the pressing ring 33 is fixedly connected to the focusing lens barrel 37, and the focusing lens barrel 37 is connected to the hollow rotating shaft 32.

Specifically, referring to fig. 9, the focusing lens 35 is disposed obliquely relative to the focusing lens barrel 37, and a central line B of the focusing lens and a central line C of the focusing lens barrel form an included angle a.

It should be noted that the inclined arrangement of the focusing mirror 35 can be realized by arranging a height difference on two sides of the first washer 34 to form an inclined plane, the second washer 36 is adapted to the first washer 34, so that the first washer 34, the focusing mirror 35 and the second washer 36 are fixed in the head of the focusing mirror 35 while the clamping ring 33 is fixed with the focusing barrel 37, and the focusing mirror 35 is tightly attached to the inclined plane to form the included angle a, which is actually equal to an angle formed by a center line of the inclined plane of the first washer 34 and the horizontal direction.

Of course, the angle a may be formed by simply setting the focusing barrel 37 to be an inclined plane, and the focusing lens 35 is not inclined, which is not described herein again.

As is well known, the focusing mirror 35 can focus the laser, so that the energy is concentrated, the welded material and the welding wire 19 are melted during welding to form a specific molten pool, the molten metal fills the splicing seam and is condensed along with the removal of the laser, and the welding seam is formed, and in actual operation, because the light spot 100 from the focusing mirror 35 is emitted from the center line and has a fixed diameter, the area of the formed molten pool is small, the splicing seam of the material to be welded is required to be small, and the position accuracy of the light spot 100 irradiation is high, so that the use requirement can be met.

When the focusing mirror 35 of the present invention works, as shown in fig. 10, 11 and 12, due to the above-mentioned included angle a, when the rotating motor 26 rotates, the laser does not emit from the center line of the laser welding head body 3, but is shifted to the position below in the figure, and the spot 100 rotates and shifts along with the rotating motor 26 along with the rapid rotation of the rotating motor 26, when the laser irradiates the material, the laser heats the material, although the spot 100 rotates along with the rotation of the rotating motor 26, because the rotating motor 26 rotates very fast and the heat dissipation speed of the material is slow, the spot 100 is irradiated all the time, which is equivalent to that the spot 100 is enlarged, and is in accordance with the principle of point-motion forming, so that the irradiation area is enlarged, the molten pool is correspondingly enlarged, and the welding effect of a large weld is better.

The present invention is not limited to the above-described embodiments, and various modifications and variations of the present invention are included if they do not depart from the spirit and scope of the present invention, and they are within the scope of the claims and the equivalent technology of the present invention.

Claims

1. A laser wire feeding welding machine is characterized in that: the welding wire device comprises a laser welding head main body, an optical fiber head and an optical fiber cable, wherein the optical fiber cable is fixedly spliced with the laser welding head main body through the optical fiber head, a welding wire front outer tube fixing seat and a welding wire rear outer tube fixing seat are arranged below the laser welding head main body, a welding wire front outer tube is fixed on the welding wire front outer tube fixing seat, a welding wire rear outer tube is fixed on the welding wire rear outer tube fixing seat, a welding wire soft outer tube is sleeved on the welding wire rear outer tube, a groove body is arranged on the welding wire rear outer tube fixing seat, a laser switch button and a spring are arranged in the groove body, a switching hole is formed in the groove body, a switch pulling and buckling mechanism is rotatably connected on the switching hole and comprises a pulling and buckling body, a switching column and a limiting column, the switching column is rotatably connected with the switching hole, a welding wire channel is arranged in the, switching post and spacing post set up in the both sides of welding wire passageway, be provided with the welding wire in outer tube before outer tube, swing sleeve pipe and the welding wire behind the welding wire.

2. The laser wire feed welder according to claim 1, characterized in that: the front end of laser welding main part is provided with the mounting groove, fixedly connected with location tungsten tip on the mounting groove, be provided with welding wire through-hole or U type groove on the location tungsten tip.

3. The laser wire feed welder according to claim 1, characterized in that: the laser welding head main body comprises a shell, a laser channel is arranged in the shell, a reflector module is arranged at a corner of the shell, a rotating motor, a focusing mirror module and a protective mirror module are further arranged in the laser channel, and the focusing mirror module is connected with the rotating motor.

4. The laser wire feed welder according to claim 3, characterized in that: the reflector module comprises a reflector fixed block and a reflector, the reflector fixed block is fixedly connected with the shell, and the reflector is arranged on the reflector fixed block.

5. The laser wire feed welder according to claim 3, characterized in that: the protective glass module is embedded into the caulking groove and fixedly connected with the shell.

6. The laser wire feed welder according to claim 3, characterized in that: the rotary motor comprises a motor body and a rotating shaft, the rotating shaft is a hollow rotating shaft, the focusing lens module comprises a pressing ring, a first gasket, a focusing lens, a second gasket and a focusing lens barrel, the first gasket, the focusing lens and the second gasket are sequentially arranged in the focusing lens barrel and are limited by the pressing ring, the pressing ring is fixedly connected with the focusing lens barrel, and the focusing lens barrel is connected with the hollow rotating shaft.

7. The laser wire feed welder according to claim 6, characterized in that: the focusing lens is obliquely arranged relative to the focusing lens barrel, and an included angle is formed between the central line of the focusing lens and the central line of the focusing lens barrel.