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How to choose laser welding machine in sheet metal industry

How to choose laser welding machine in sheet metal industry

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As the welding strength and appearance requirements of sheet metal welding are getting higher and higher, especially for parts with high added value and high welding quality requirements, traditional welding methods will inevitably lead to deformation of the workpiece due to large heat input, etc. Problem, requires extensive grinding and shaping methods, leading to rising costs.

However, laser welding has extremely high energy density and extremely low heat-affected zone, which not only significantly improves welding efficiency, but also improves quality and reduces post-processing time.

Therefore, the application of laser welding in modern sheet metal manufacturing is becoming more and more popular. Many customers are concerned about equipment procurement costs, welding efficiency and quality, grinding speed, post-processing consumables, power consumption, operation difficulty, safety protection, after-sales costs and many other aspects.

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There are many kinds of welding machines on the market. Customers must consider the following factors when choosing laser welding machine:

1. Optical characteristics: spot size (laser rod diameter, fiber diameter and type, exit head parameters), focal plane height, depth of field, spot position, spot angle of incidence;

2. Control characteristics: selection of feedback control mode and power waveform.

After comparing various welding modes, our company has launched three types of laser welding equipment: fiber optic four-dimensional automatic welding, robot automatic welding, and hand-held laser welding for the different needs of the sheet metal industry. The light sources of the three devices all use fiber lasers, no consumables and maintenance are required, the beam quality is good, and the welding speed is fast, which is the best principle for processing in the sheet metal industry.

Selection of equipment

01. Automatic fiber welding

dtrgf (1)

Scope of application: mainly used for large batches of small and medium-sized standard sheet metal, the product has high precision, and batch processing can be realized with good tooling and fixtures.

High-efficiency automation: high-power laser output, high-precision repeat positioning, remote four-dimensional workbench, ultra-convenient operating system, automatic focus and rotation of the welding head, realizing the high-efficiency ratio of processing and production automation;

Strong and beautiful: the weld has a high aspect ratio (deep and narrow), no filler wire is needed, the pollution of the melting zone is small, the weld has high strength and toughness (even exceeds the base material), and is bright and beautiful;

Small heat influence: the laser power is high, and the welding process is extremely fast, so the heat input to the workpiece is very low, the heat-affected zone is small, and the workpiece does not deform;

High density: the gas escapes quickly when the weld seam is formed, and the penetration weld seam has no pores. Moreover, the rapid cooling after welding makes the weld structure fine and the welding density is very high.

Control: It can control all functions such as welding seam positioning, spot size, beam transmission, light energy adjustment, stroke control, high-speed emergency stop, etc.;

Convenient operation: centralized operation of buttons, visual monitoring of the screen, convenient and fast operation;

Stable performance: The machine is strictly controlled by the quality technical team from the parts to the whole machine, and will be thoroughly inspected and tested before leaving the factory, so the machine performance is very stable;

Wide range of applications: four-axis long-stroke linkage, different waveforms can be set for process parameters according to different welding materials, so that welding parameters can match welding requirements. Suitable for welding in various industries, products and methods.

Swing head: the size and shape of the light spot can be adjusted, which can be widely used and can be adapted to the welding of various products.

02. Robot welding

dtrgf (2)

Applications: It is mainly used for large batches of medium and large standard sheet metal. It has high positioning accuracy and flexible movement. It is suitable for various workpieces with complex trajectory angles. It can be made into multi-stations to improve welding efficiency. It is the only choice to replace manual work and reduce labor intensity.

Using a six-axis robotic arm, the welding range is wide.

Repeat positioning accuracy is higher, up to 0.05 mm.

The robot has good rigidity and long service life.

The production efficiency is greatly improved, and it can work continuously for 24 hours. Combined with tooling and assembly line, it can realize automatic mass production.

Swing head: the size and shape of the light spot can be adjusted, which can be widely used and can be adapted to the welding of various products.

03. Handheld laser welding

dtrgf (3)

Applications: Mainly used for non-standard sheet metal. There are many kinds of products, not suitable for various fixtures, avoid excessive investment. The bending accuracy of the product is not high, and the gap is too large, which solves the problem of difficult recruitment. This model has won unanimous praise from customers.

Simple operation: The handheld laser welding machine is easy to learn and use, and the operator can easily achieve high-quality welding results.

High welding efficiency: Hand-held laser welding is faster than argon arc welding. Based on saving two welding workers, the production efficiency can be easily doubled

No welding consumables: welding can be easily completed without filler wire during operation, which reduces the material cost in production and processing.

Good welding effect: Hand-held laser welding is hot-melt welding. Compared with traditional welding, laser welding has higher energy density and better effect.

High energy efficiency conversion: The photoelectric conversion efficiency of the laser is as high as 30%, and the energy consumption is lower.

Easy to use and flexible: hand-held laser welding, free and flexible, reachable range

Weld seams do not need to be polished: continuous welding, smooth without fish scales, beautiful and without scars, reducing subsequent grinding processes.

Swing head: the size and shape of the light spot can be adjusted, which can be widely used and can be adapted to the welding of various products.

When selecting the laser power waveform, generally speaking, under the premise of outputting the same laser energy, the wider the pulse width, the larger the welding spot; the higher the peak power of the laser power waveform, the deeper the welding spot. At present, there is no complete set of laser power waveform setting methods. Users can gradually explore in the process of use to find the laser power waveform suitable for their own products.

The choice of laser welding machine is very important to the yield rate of batch processing; therefore, if conditions permit, users can use laser power real-time negative feedback welding machine as much as possible to improve the good rate of products.

If you want to learn more about laser welding, or want to buy the best laser welding machine for you, please leave a message on our website and email us directly!

Post time: Feb-17-2023