Views: 6 Author: Site Editor Publish Time: 2022-01-18 Origin: Site
Laser Handheld Fiber Laser Welding Machine, also called Portable Fiber Laser Welding Machine, Handheld Fiber Laser Welder, Manual Fiber Laser Welding Machine, is a new type high-power, high-end continuous welding tool that couples a high-energy laser beam into an optical fiber, collimates it into parallel light through a collimating lens after long-distance transmission, and then focuses on the workpiece for welding.
The handheld laser welding machines for metals, equipped either with an independently developed wobble welding head or a common welding head, greatly improving the joint strength and quality of welding and obtaining better weld formability. All products realize spot welding, straight seam welding, overlap welding, circumferential welding, and welding of any track. And you can also add welding wire. Compared with traditional argon arc welding, the efficiency is increased by more than 50%.
Speed and flexibility
Laser welding is a very fast technique. Depending on the type and power of laser used, thin section materials can be welded at speeds of many metres a minute. Lasers are, therefore, extremely suited to working in high productivity automated environments. For thicker sections, productivity gains can also be made as the laser keyhole welding process can complete a joint in a single pass which would otherwise require multiple passes with other techniques. Laser welding is nearly always carried out as an automated process, with the optical fibre delivered beams from Nd:YAG, diode, fibre and disk lasers in particular being easily remotely manipulated using multi-axis robotic delivery systems, resulting in a geometrically flexible manufacturing process.
Deep, narrow welds
Laser welding allows welds to be made with a high aspect ratio (large depth to narrow width). Laser welding, therefore, is feasible for joint configurations that are unsuitable for many other (conduction limited) welding techniques, such as stake welding through lap joints. This allows smaller flanges to be used compared with parts made using resistance spot welding.
Low distortion and low heat input
Lasers produce a highly concentrated heat source, capable of creating a keyhole. Consequently, laser welding produces a small volume of weld metal, and transmits only a limited amount of heat into the surrounding material, and consequently samples distort less than those welded with many other processes. Another advantage resulting from this low heat input is the narrow width of the heat affected zones either side of the weld, resulting in less thermal damage and loss of properties in the parent material adjacent to the weld.
Suitable for a range materials and thicknesses
With lasers, many different materials can be welded or joined, both metallic and non-metallic, and including steels, stainless steels, Al, Ti and Ni alloys, plastics and textiles. Furthermore, taking the example of steels, the thickness of the material that can be welded can be anything from under a millimetre to around 30mm , depending on the type and power of laser used.
Performed out of vacuum
Unlike the majority of electron beam keyhole welding operations, laser welding is carried out at atmospheric pressure, although gas shielding is often necessary, to prevent oxidation of the welds.
Non-contact, single-sided process
Laser welding does not apply any force to the workpieces being joined, and more often or not is a single sided process, ie completing the joint from one side of the workpieces. However, in common with many other fusion processes, weld root shielding can be required from the opposite side.
Using lasers, spot or stitch welds, if fit for purpose, can be made just as easily as continuous welds.
Apart from welding, with a few adjustments, a laser source can be used for many other materials processing applications, including cutting, surfacing, heat treatment and marking, and also for more complex techniques such as rapid prototyping. Furthermore, the way in which the beam(s) is/are delivered to the workpieces can be approached in a number of different ways, including:
Time-sharing of a single beam between different welding stations, allowing one laser source to process multiple jobs.
Energy-sharing a single beam, allowing one laser source to process two different areas (or the same area from opposite sides) on a workpiece.
Beam shaping or splitting using special transmission or focusing optics, allowing processing of materials with beams of different energy distributions.
With the increasing requirements for plastic products in different industries, it is difficult for traditional processes to meet the current processing needs. For plastic products that require high-speed welding, precision welding or aseptic welding, laser welding is more advantageous.
With the changes in market demand, plastic products now have different types and colors. However, laser welding can achieve higher welding firmness by adding various pigments to the weld during the welding process.
1. Thermal welding. For butt and lap joints, conduction welding is used to maintain molten metal pools under and behind the moving laser. The beam pattern and focal length affect the aspect ratio of the weld, but generally speaking, the conductive weld is wider and shallower than the keyhole weld.
2. Keyhole welding. The laser evaporates and melts the material. The plasma generated in front of the weld allows the laser to penetrate deeper. By precisely controlling the speed and energy of the laser, you can produce deep and narrow welds without pockets. Compared with conduction welding, laser keyhole welding requires a higher power density.
3. Laser spot welding. This method uses conductive welding or laser keyhole welding technology. Depending on the material type, thickness and solder joint size, you can use single-pulse, multi-pulse or perforated laser technology.
iGoldencnc group is one of manufacturing and research and development of the company that focus on CNC engraving machine and cutting machine for many years since 2002. Located in Jinan,shandong province,covers the area of 6000 square meters. Now we have two modern companies and more than 100 people,three sales teams, two product research and development teams, two after-sales service teams. Products exported to Europe,America,Australia,Africa,Asia etc.