CN214024068U - Automatic trail laser filler wire welding with vibration laser welding mechanism - Google Patents

Abstract

The utility model belongs to the technical field of the battery case, the utility model provides a this automatic tracking laser is filled out wire welding and is used vibration laser welding mechanism, mainly include optic fibre, automatic focusing collimation mechanism, send wire mouth and protective gas mechanism, tracking mechanism and vibration light beam production mechanism, on the in-process wobbling laser beam transmission of laser welding wire sent wire mouth and protective gas mechanism, send wire mouth and protective gas mechanism to the welding seam position through tracking mechanism transmission to automatic focusing collimation mechanism automatic adjustment laser beam's focus. The utility model has the advantages of through increasing light beam vibration mechanism on the speculum, realize the swing of laser beam current to the aperture that makes laser welding swings thereupon, can play the effect that provides a stirring power to the welding molten bath, has increaseed the convection current and the stirring of welding molten bath, plays favourable effect to eliminating the gas pocket, and the welding seam joint performance of filling wire welding has the improvement by a wide margin to improving laser.

Description

Automatic trail laser filler wire welding with vibration laser welding mechanism

Technical Field

The utility model belongs to the technical field of laser welding, a automatic trail laser filler wire welding is with vibration laser welding mechanism is related to.

Background

During laser wire filling welding, a laser beam firstly acts on a welding wire, the welding wire is heated and melted by the laser beam to fill a weld gap, and then under the continuous action of the laser beam, a base metal is melted to form a small hole. When the work moves, the small hole moves, and the original hole is sealed to form a welding seam. Compared with steel, the small hole formed in the aluminum alloy laser welding process is in a more unstable state, the small hole and a molten pool flow very violently, in the filler wire welding process, metal steam inside the small hole erupts outwards to cause steam vortex at the opening of the small hole, protective gas is drawn into the bottom of the small hole, and along with the forward movement of the small hole, the protective gas enters the molten pool in a bubble mode, and when the gas does not escape in time, the protective gas is remained on a welding line to form a gas hole. Because of wire feeding, the welding seam can bring more gas into the welding seam, and the gas is not easy to discharge, so that excessive air holes are generated in the welding seam of the deep fusion welding of the laser filler wire welding. And by adopting the vibration laser wire-filling welding scheme, the reciprocating swing of the laser beam to the welding seam enables part of the welding seam to be repeatedly remelted, the retention time of liquid metal in a welding pool is prolonged, meanwhile, the deflection of the beam also increases the unit area heat output, the depth-to-width ratio of the welding seam is reduced, and the floating of bubbles is facilitated, so that the effect of eliminating air holes is achieved. On the other hand, the small hole swings along with the swing of the beam, so that the effect of providing a stirring force for the welding pool is achieved, the convection and the stirring of the welding pool are increased, the effect of eliminating air holes is achieved, in order to achieve the effect of beam vibration of the wire filling welding, the robot swings to carry out beam vibration, and the method is used for wire filling welding application with low speed due to the swing frequency of the robot. In order to adapt to high-speed laser welding, high-frequency vibration of a robot is not practical, a light beam needs to be vibrated, a lens of the light beam is vibrated, small amplitude can be used, and large welding amplitude can be obtained, so that high-frequency vibration can be realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem, be to prior art's current situation, and provide an automatic trail laser filler wire welding is with vibration laser welding mechanism, mainly utilize light beam vibration mechanism, be applied to the production field that adopts the welding wire to carry out mechanical type autotracking for reduce the welding seam gas pocket, improve the welding seam and fuse the width, reduce weldment fit-up gap requirement.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides an automatic trail laser filler wire welding is with vibration laser welding mechanism which characterized in that includes:

an optical fiber for generating a laser beam;

the automatic focusing and collimating mechanism is used for collimating the laser beam generated by the optical fiber and adjusting the focal length;

the vibration beam generating mechanism is positioned below the automatic focusing collimation mechanism, and obtains the vibration of the laser beam by controlling the vibration frequency and the amplitude of the lens of which the laser beam turns to 90 degrees so as to realize the swing of the laser beam;

the wire feeding nozzle and the shielding gas mechanism are used for feeding wires and conveying shielding gas during laser welding;

and the tracking mechanism is connected with the wire feeding nozzle and the shielding gas mechanism, wherein the swinging laser beam is transmitted to the wire feeding nozzle and the shielding gas mechanism, and the wire feeding nozzle and the shielding gas mechanism transmit the position of the welding seam to the automatic focusing and collimating mechanism through the tracking mechanism to automatically adjust the focal length of the laser beam.

In foretell an automatic tracking laser fills wire welding and welds with vibration laser, vibration beam produce the mechanism and include speculum vibration subassembly, second mirror and focusing mirror, speculum vibration subassembly install under automatic focusing collimation mechanism, the focusing mirror is installed under the second mirror, make laser beam produce the swing and reflect 90 back and transmit to the second mirror when laser beam passes through speculum vibration subassembly, the second mirror reflect 90 with laser beam and transmit to the focusing mirror focus back output again.

In the vibration laser welding mechanism for automatic tracking laser filler wire welding, the reflector vibration component comprises a first reflector, a vibration transmission mechanism and a vibration motor, the first reflector is connected to the vibration transmission mechanism, the vibration transmission mechanism is connected to the vibration motor, and the vibration motor transmits vibration action to the vibration transmission mechanism.

In the vibration laser welding mechanism for automatic tracking laser filler wire welding, the first reflector and the second reflector are both 90-degree reflectors.

Compared with the prior art, the utility model has the advantages of through increasing light beam vibration mechanism on the speculum, thereby realize that mechanical tracking filler wire welds laser welder head and carries out the light beam vibration, turn to the vibration frequency of 90 camera lenses through control laser beam, and the vibration that obtains the light beam with the amplitude, realize the swing of laser beam current, thereby make the aperture of laser welder swing thereupon, can play the effect that provides a stirring power to the welding molten bath, the convection current and the stirring of welding molten bath have been strengthened, play favourable effect to eliminating the gas pocket, the welding seam joint performance of welding filler wire welding has improvement by a wide margin to improving.

Drawings

FIG. 1 is a schematic view of the overall structure of the vibration laser welding mechanism for automatic tracking laser filler wire welding;

FIG. 2 is a schematic view of the structure of the mirror oscillating assembly;

FIG. 3 is a schematic view of the optical path propagation of the mechanically tracking laser wire feed laser beam of the present patent.

Detailed Description

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

In the description of the present invention, it should be understood that the terms "center", "horizontal", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the invention.

In the figure, an optical fiber 100; an autofocus alignment mechanism 200; a wire feeding nozzle and shielding gas mechanism 300; a tracking mechanism 400; a vibration beam generating mechanism 500; a laser beam 600; mirror vibrating assembly 700; a first mirror 701; a vibration transmission mechanism 702; a vibration motor 703; a second mirror 800; a focusing mirror 900.

As shown in fig. 1, the vibration laser welding mechanism for automatic tracking laser filler wire welding mainly comprises an optical fiber 100, an automatic focusing collimation mechanism 200, a wire feeding nozzle and shielding gas mechanism 300, a tracking mechanism 400 and a vibration beam generation mechanism 500, wherein the optical fiber 100 is mainly used for generating a laser beam 600 and used for laser filler wire welding, the automatic focusing collimation mechanism 200 is used for straightening and adjusting the focal length of the laser beam 600 generated by the optical fiber 100, and the wire feeding nozzle and shielding gas mechanism 300 is used for feeding wire and conveying shielding gas during laser welding; the tracking mechanism 400 is connected with the wire feeding nozzle and the shielding gas mechanism 300, and mainly confirms the current wire feeding position, the biggest innovation of the patent is that a vibration beam generating mechanism 500 is added on the original basis, the whole vibration beam generating mechanism 500 is positioned under the automatic focusing collimation mechanism 200, wherein the vibration beam generating mechanism 500 obtains the vibration of the laser beam 600 by controlling the vibration frequency and the vibration amplitude of the lens of the laser beam 600 turning to 90 degrees, so as to realize the swing of the laser beam 600, achieve the convection and the stirring of welding to a welding pool, the laser beam 600 swinging in the laser welding wire process is transmitted to the wire feeding nozzle and the shielding gas mechanism 300, the wire feeding nozzle and the shielding gas mechanism 300 transmits the welding seam position to the automatic focusing collimation mechanism 200 through the tracking mechanism 400, and automatically adjust the focal length of the laser beam 600, thereby ensuring the stability of the laser beam 600 position.

Specifically, as shown in fig. 2, as a further optimization, the vibration beam generating mechanism 500 includes a mirror vibrating assembly 700, a second mirror 800 and a focusing mirror 900, the mirror vibrating assembly 700 includes a first mirror 701, a vibration transmission mechanism 702 and a vibration motor 703, the first mirror 701 and the second mirror 800 are 90 ° mirrors, the first mirror 701 is connected to the vibration transmission mechanism 702, the vibration transmission mechanism 702 is connected to the vibration motor 703, the vibration motor 703 transmits a vibration action to the vibration transmission mechanism 702, wherein the amplitude and frequency of vibration of the laser beam 600 are controlled by the vibration amplitude and frequency of the vibration motor 703, the mirror vibrating assembly 700 is installed under the automatic focusing alignment mechanism 200, the focusing mirror 900 is installed under the second mirror 800, the laser beam 600 is transmitted to the second mirror 800 after being oscillated and reflected by 90 ° when passing through the mirror vibrating assembly 700, the second reflecting mirror 800 reflects the laser beam 600 by 90 ° and transmits the laser beam to the focusing mirror 900 for focusing and outputting.

As shown in fig. 3, during assembly, the mirror vibrating assembly 700 is fixed to the automatic focusing and collimating mechanism 200 by bolts, then the second reflecting mirror 800 is mounted on the mirror vibrating assembly 700, the focusing mirror 900 is mounted under the 90-degree second reflecting mirror 800, and finally the welding seam position is transmitted to the automatic focusing and collimating mechanism 200 through the tracking mechanism 400 by the wire feeding nozzle and the shielding gas mechanism 300 to automatically adjust the focal length, so that the vibrating motor 703 drives the first reflecting mirror 701, the angle of the first reflecting mirror 701 can be changed, the position where the laser beam 600 irradiated to the first reflecting mirror 701 is transmitted to the second reflecting mirror 800 is changed, the reflection position of the laser beam 600 is driven to move left and right, and therefore the laser position far from the focal point can move left and right.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein will be apparent to those skilled in the art without departing from the scope and spirit of the invention as defined in the accompanying claims.

Claims (4)

1. The utility model provides an automatic trail laser filler wire welding is with vibration laser welding mechanism which characterized in that includes:

an optical fiber for generating a laser beam;

the automatic focusing and collimating mechanism is used for collimating the laser beam generated by the optical fiber and adjusting the focal length;

the vibration beam generating mechanism is positioned below the automatic focusing collimation mechanism, and obtains the vibration of the laser beam by controlling the vibration frequency and the amplitude of the lens of which the laser beam turns to 90 degrees so as to realize the swing of the laser beam;

the wire feeding nozzle and the shielding gas mechanism are used for feeding wires and conveying shielding gas during laser welding;

and the tracking mechanism is connected with the wire feeding nozzle and the shielding gas mechanism, wherein the swinging laser beam is transmitted to the wire feeding nozzle and the shielding gas mechanism, and the wire feeding nozzle and the shielding gas mechanism transmit the position of the welding seam to the automatic focusing and collimating mechanism through the tracking mechanism to automatically adjust the focal length of the laser beam.

2. The vibration laser welding mechanism for the automatic tracking laser filler wire welding as claimed in claim 1, wherein the vibration beam generating mechanism comprises a mirror vibration assembly, a second reflecting mirror and a focusing mirror, the mirror vibration assembly is installed under the automatic focusing and aligning mechanism, the focusing mirror is installed under the second reflecting mirror, the laser beam is swung and reflected by 90 ° when passing through the mirror vibration assembly and then transmitted to the second reflecting mirror, and the second reflecting mirror reflects 90 ° and transmits the laser beam to the focusing mirror for focusing and outputting.

3. The vibratory laser welding mechanism of claim 2 wherein the mirror vibratory assembly comprises a first mirror, a vibratory drive mechanism, and a vibratory motor, the first mirror being coupled to the vibratory drive mechanism, the vibratory drive mechanism being coupled to the vibratory motor, the vibratory motor transmitting vibratory motion to the vibratory drive mechanism.

4. The vibration laser welding mechanism for automatic tracking laser filler wire welding as claimed in claim 3, wherein said first reflector and said second reflector are 90 ° reflectors.

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