Standard Welding Heads Or Wobble Welding Heads?
Handheld Fiber Laser Welding Machines with standard welding heads are designed to focus a collimated laser beam to a required spot size, keeping the beam path static through the beam delivery and a static spot at the focal plane. Therefore, this standard configuration limits each setup to a specific application.
Handheld Fiber Laser Welders with Wobble welding heads incorporate scanning mirror technology inside a standard weld head. By oscillating the beam with internal mirrors, the focal spot is no longer static, and can be dynamically adjusted by changing the shape, amplitude, and frequency.
In order to get wobble welding (or oscillation welding) is where a high-beam-quality laser, we used with a galvo scan-head to rapidly oscillate the focal spot.
Wobbling effectively increases beam diameter during laser welding, increasing the width of the weld while maintaining the efficiency of deep keyhole welding. This method of welding enables much easier control of weld parameters such as weld width and depth of penetration which can lead to a more efficient welding process.
Compared to common laser welding, wobble laser welding best for wider seam welding and deep penetration welding.
Fiber laser technology with wobble, increases the quality and productivity of high-power fiber laser welding.
This method of welding enables much easier control of weld parameters such as weld width and depth of penetration which can lead to a more efficient welding process.
Two Kinds Of Fiber Laser Welding For Different Product Design Needs
Materials are join without the addition of extra filler materials which requires the highest level of fixturing and joint preparation.
Welding seams can be form completely by melting part of the base material without using additional filler
Joint fit-up gap: Since no material is add, it is necessary for the materials to be weld to remain in intimate contact during the welding process.
Fixturing: Fixturing to ensure consistent fit-up of the weld joint is a key to successful fiber laser welding. An important benefit of fiber laser is weld joints with exceptional cosmetic appearance. In some cases, these welds are almost perfectly blend with the surrounding material. Depending on the fixturing and joint fit-up, some welds may have small amounts of concavity or convexity. Which may not be acceptable for product designs that require fatigue properties similar to those of the base material.
Material is add to the weld joint usually in the form of metallic wire or powder.
Three reasons for adding material to the weld are:
Joint fit-up: By adding external material, the joint becomes more tolerant to joint mismatch. Acceptable welds may be produce from joints with less than perfect fit-up.
Weld geometry: Addition of filler metal is use to control the shape and size of the weld. Maintaining a crown (convex surface of the weld) creates a reinforcement which is important for joints requiring mechanical strength. And fatigue life in the overall product’s design performance.
Dissimilar metals: Filler metal is add to facilitate welding of dissimilar metals and alloys which are otherwise metallurgically incompatible.
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