CN212665115U

CN212665115U - Self-adaptive contact type welding wire guiding module for laser brazing and welding seam tracking system

Info

Publication number: CN212665115U
Application number: CN202020625287.8U
Authority: CN
Inventors: 金亚娟; 吴晓明
Original assignee: Parnova Intelligent Technology Suzhou Co ltd
Current assignee: Parnova Intelligent Technology Suzhou Co ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-03-09
Anticipated expiration: 2030-04-23

Abstract

The utility model discloses a self-adaptive contact welding wire guiding module and a welding seam tracking system for laser brazing, wherein the welding wire guiding module comprises a wire feeding mechanism and a welding seam tracking module, the welding seam tracking module is obliquely arranged in front of the wire feeding mechanism, and the longitudinal sections of the welding wire guiding module and the welding seam tracking module are positioned on the same Z plane; the end part of the welding seam tracking module is conical, and the conical end part and a wire feeding nozzle of the wire feeding mechanism are positioned on the same welding working surface; the wire feeding mechanism and the welding seam tracking module are arranged on the telescopic arm connecting block, the telescopic arm connecting block comprises an installation platform, and a through hole matched with the wire feeding module and the welding seam tracking module is formed in the installation platform; a welding seam tracking system comprises a refrigeration unit, an optical fiber coupler, a collimation and steering unit, a rotation module, a light spot optical module, a camera, a steering module, a spring telescopic contact unit, a welding wire guide module and a shielding gas unit; the utility model discloses can show accuracy, effectual improvement welding quality and the joint strength that improves the welding seam tracking.

Description

Self-adaptive contact type welding wire guiding module for laser brazing and welding seam tracking system

Technical Field

The utility model relates to an automatic change laser welding equipment, especially relate to a self-adaptation mechanical contact welding wire guide module for laser brazing, still relate to a welding seam tracker simultaneously.

Background

At present, a welding wire is used as a welding seam tracking design, because a wire feeding nozzle is abraded by the welding wire under a long-time working state, namely the diameter size of the wire feeding nozzle is increased, the accuracy of the welding seam tracking is reduced, the position influencing the tracking of a laser beam is not in a correct position to be welded, so that the phenomena of false welding and non-welding on the surface of a welded welding seam are caused, and particularly, under the condition of using a welding wire material of aluminum alloy, the requirement on accuracy is higher because the material of the aluminum welding wire is softer; in addition, also replace present acicular guide equipment simultaneously, because when the vapour car roof laser brazing, there is 0.2mm clearance between top cap and the side wall, acicular welding seam tracking equipment can appear acicular equipment fracture phenomenon and equipment card between the work piece when the during operation, can influence the welding process equally.

Compared with the traditional welding technology, the laser welding has obvious advantages in the aspects of welding quality, production efficiency and the like. However, the spot diameter of the laser beam is small, so that the accurate centering of the laser beam on the position to be welded becomes a premise of obtaining a high-quality weld joint, and in addition, the quality of the weld joint is also influenced due to the difference in the production of the vehicle body coming parts. Therefore, it is critical to use an accurate seam tracking system to ensure accurate alignment of the seam and laser beam to obtain a good weldment.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: to the problem that prior art exists, the utility model aims at providing a self-adaptation contact welding wire guide module for laser brazing, the utility model discloses a another aim at provides a welding seam tracker including self-adaptation contact welding wire guide module.

The technical scheme is as follows: a self-adaptive contact type welding wire guiding module for laser brazing comprises a wire feeding mechanism and a welding seam tracking module, wherein the welding seam tracking module is obliquely arranged in front of the wire feeding mechanism, and the longitudinal sections of the welding seam tracking module and the welding seam tracking module are positioned on the same Z plane; the end part of the welding seam tracking module is conical, and the conical end part and a wire feeding nozzle of the wire feeding mechanism are positioned on the same welding working surface;

the wire feeding mechanism and the welding seam tracking module are installed on the telescopic boom connecting block, the telescopic boom connecting block comprises an installation platform, and a through hole matched with the wire feeding module and the welding seam tracking module is formed in the installation platform.

Further, the distance between the end part of the welding seam tracking module and the center of the wire feeding nozzle is 14 mm-14.1 mm; the cone angle of the conical end is 30-45 deg., preferably 33 deg.. The height of the tapered end is 11 mm.

Further, the main body part of the welding seam tracking module is a cylinder.

A weld tracking system comprising the adaptive contact wire guide module: the device also comprises a refrigeration unit, an optical fiber coupler, a collimation and steering unit, a rotation module, a facula optical module, a camera, a steering module, a spring telescopic contact unit and a protective gas unit;

the refrigeration unit is arranged on the optical fiber coupler, the optical fiber coupler is connected with the collimation steering unit, the collimation steering unit is connected with the rotating module, the rotating module is provided with a facula optical module, the other end of the facula optical module, which is far away from the rotating module, is provided with a steering module, the camera and the shielding gas unit are respectively arranged at the upper end and the lower end of the steering module, the spring telescopic contact unit is arranged on the side wall of the steering module, and the wire feeding mechanism of the welding wire guide module and the welding seam tracking module are arranged on the spring telescopic contact unit through a connecting block.

Furthermore, the light spot optical module is a double-light spot module which divides the light beam emitted from the laser source into two laser beams embedded inside and outside. The double-spot module comprises a plurality of prisms with different angles, and a focusing mirror is arranged below the double-spot module; the light beams enter the double-light-spot module after being collimated and parallel, are scattered by prisms with different angles in the double-light-spot module, and form double light spots after passing through the focusing mirror.

Compared with the prior art, the utility model has the advantages of as follows: 1. the utility model discloses a self-adaptation contact welding wire guide module has updated and has used the welding wire to be the design of seam tracking at present, can show the accuracy that improves the seam tracking. 2. The double-light-spot module is integrated in a laser brazing tool and is used for the double-light-spot laser brazing process of the aluminum alloy used as the automobile body material. The light beam emitted from the laser source is divided into two laser beams by the double-light spot module, and the two laser beams are embedded inside and outside. The small light spot on the inner side is adjustable from 0.4 mm to 0.8mm, the small light spot concentrates the laser density, so that the aluminum alloy is easy to form a small hole effect, and the large light spot on the outer side is 1.5mm, so that the aluminum alloy welding line surface leveling and smoothing effect is realized. In addition, due to the action of the two light sources, the opening of the small hole is larger, so that the escape of internal metal vapor is facilitated, and the stability of the small hole is also facilitated, thereby reducing weld pores and effectively improving the welding quality and the connection strength.

Drawings

FIG. 1 is a schematic diagram of an adaptive contact wire guiding module;

FIG. 2 is a schematic size diagram of a wire guiding module according to an embodiment of the present invention;

FIG. 3 is a block diagram of a weld tracking system including the wire guide module shown in FIG. 1.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the present invention will be described in detail with reference to the following embodiments and accompanying drawings.

As shown in fig. 1-2, a self-adaptation contact welding wire guide module for laser brazing, including wire feeder 1 and welding seam tracking module 2, the slope of welding seam tracking module 2 sets up in wire feeder's the place ahead, and the arrow indicates the direction and is the welding seam tracking direction in the picture, promptly "the place ahead". The longitudinal sections of the wire feeder 1 and the welding seam tracking module 2 are on the same Z plane, the end part 201 of the welding seam tracking module 2 is conical, and the conical end part and the wire feeding nozzle 101 of the wire feeder are on the same welding working surface and move along the welding seam direction; the material of the welding seam tracking module 2 is alumina ceramics.

Wire feeder 1 and welding seam tracking module 2 are installed on flexible arm connecting block 3, and flexible arm connecting block 3 includes mounting platform 301, and mounting platform 301 is last be provided with the through-hole of sending a module and welding seam tracking module adaptation.

The distance between the end 201 of the welding seam tracking module and the center of the wire feeding nozzle 101 is 14 mm-14.1 mm, and the taper angle of the conical end of the welding seam tracking module is 30-45 degrees; in practical application, specific parameter values need to be determined according to the size of a welding seam and the accuracy requirement. In the embodiment shown in fig. 2, the center distance is 14.1mm, the cone angle is 33 °, and the cone end is 11 mm. Further, the main body part of the weld tracking module behind the tapered end part is a cylinder, and the height of the tapered end part and the cylinder part is 21 mm.

As shown in fig. 3, the weld tracking system including the adaptive contact type welding wire guiding module further includes a refrigeration unit 4, an optical fiber coupler 5, a collimation and steering unit 6, a rotation module 7, a spot optical module 8, a camera 9, a steering module 10, a spring telescopic contact unit 11, and a shielding gas unit 12.

Refrigeration unit 4 sets up on fiber coupler 5, fiber coupler 5 turns to unit 6 with the collimation and is connected, the collimation turns to unit 6 and is connected with rotating module 7, be equipped with facula optical module 8 on rotating module 7, the other end that rotating module 7 was kept away from to facula optical module 8 is equipped with and turns to module 10, camera 9 and protective gas unit 12 set up respectively at the upper and lower both ends that turn to module 10, the flexible contact unit 11 of spring sets up on turning to the lateral wall of module 10, wire feeding mechanism 1 links together through flexible arm connecting block 3 with the flexible arm on the welding seam tracking module 2 and the laser head concurrently.

Preferably, facula optical module is two facula modules, the utility model discloses a two facula modules are integrated in laser soldering instrument for the two facula laser soldering process of automobile body material aluminum alloy. The double-spot module comprises a plurality of prisms with different angles, and a focusing mirror is arranged below the double-spot module; the light beams are collimated and parallel to form parallel light, the parallel light enters the double-light-spot module, is scattered by prisms with different angles in the double-light-spot module, and then passes through the focusing lens to form double light spots. Whereby a beam emitted from the laser source is split into two laser beams by the dual spot module.

In addition, a set of sensors 20 is provided on the rotating module 7. The number of the sensors 20 is 3, the sensors are arranged in a row, two sensors on two sides detect the limit state of the rotating module, the welding seam tolerates the limit position where the welding wire can reach, and the sensor in the middle feeds back a signal that the welding wire guides the welding seam to track in a normal working state in the welding process. In the above connection structure, the optical fiber cable of the light source is connected through the optical fiber coupler 5. The collimation steering unit 6 is internally provided with a parabolic lens to realize two functions of light beams emitted from the laser source, 1, the laser with the divergence angle is compressed, so that the laser received from the optical cable achieves the effect of parallel light transmission, and higher laser transmission efficiency is obtained; 2. the deflection of the light beam is realized by 45 degrees, and the transmission in the direction of 45 degrees is carried out. The double-spot optical module 8 divides the light beam emitted by the laser into two laser beams which are embedded inside and outside. The small light spot on the inner side is adjustable from 0.4 mm to 0.8mm, the small light spot concentrates the laser density, so that the aluminum alloy is easy to form a small hole effect, and the large light spot on the outer side is 1.5mm, so that the aluminum alloy welding line surface leveling and smoothing effect is realized. In addition, due to the action of the two light sources, the opening of the small hole is larger, so that the escape of internal metal vapor is facilitated, and the stability of the small hole is also facilitated, thereby reducing weld pores and effectively improving the welding quality and the connection strength.

Claims

1. An adaptive contact welding wire guide module for laser brazing is characterized in that: the welding line tracking module is obliquely arranged in front of the wire feeding mechanism, and the longitudinal sections of the welding line tracking module and the welding line tracking module are positioned on the same Z plane; the end part of the welding seam tracking module is conical, and the conical end part and a wire feeding nozzle of the wire feeding mechanism are positioned on the same welding working surface;

2. The adaptive contact wire guide module of claim 1, wherein: the welding seam tracking module is made of alumina ceramics.

3. The adaptive contact wire guide module of claim 1, wherein: the distance between the end part of the welding seam tracking module and the center of the wire feeding nozzle is 14 mm-14.1 mm.

4. The adaptive contact wire guide module of claim 1, wherein: the taper angle of the tapered end portion is 30-45 deg.

5. The adaptive contact wire guide module of claim 4, wherein: the cone angle is 33 °.

6. The adaptive contact wire guide module of claim 1, wherein: the height of the tapered end is 11 mm.

7. The adaptive contact wire guide module of claim 1, wherein: the main body part of the welding seam tracking module is a cylinder.

8. A weld tracking system comprising the adaptive contact wire guide module of any of claims 1-7, wherein: the device also comprises a refrigeration unit, an optical fiber coupler, a collimation and steering unit, a rotation module, a facula optical module, a camera, a steering module, a spring telescopic contact unit and a protective gas unit;

9. The weld tracking system of claim 8, wherein: the light spot optical module is a double-light spot module which divides a light beam emitted from the laser source into two laser beams embedded inside and outside.

10. The weld tracking system of claim 9, wherein: the double-spot module comprises a plurality of prisms with different angles, and a focusing mirror is arranged below the double-spot module; the light beams enter the double-light-spot module after being collimated and parallel, are scattered by prisms with different angles in the double-light-spot module, and form double light spots after passing through the focusing mirror.