Analyze the disadvantages of traditional sheet metal fabrication.
Release time:
2025-11-26
In traditional sheet-metal fabrication processes, metal sheets are typically processed using a sequence of operations such as shearing, punching, bending, and welding, or alternatively, flame or plasma cutting followed by bending and welding. However, when faced with orders that involve multiple product varieties, small batch sizes, customization, high quality requirements, and short delivery times, these conventional methods clearly show their limitations. As a result, laser cutting has emerged as an alternative to the “shearing-punching” process.
In traditional sheet-metal fabrication processes, metal sheets are typically processed using a sequence of operations such as shearing, punching, bending, and welding, or alternatively, flame or plasma cutting followed by bending and welding. However, when faced with orders that involve multiple product varieties, small batch sizes, customization, high quality requirements, and short delivery times, these conventional methods clearly show their limitations. As a result, laser cutting has emerged as an alternative process to the "shearing-punching" sequence.
With their flexibility and high adaptability, these technologies are often employed in the manufacturing of irregularly shaped (or complex-shaped) workpieces and samples—whether single pieces or very small batches—and are gradually replacing some traditional sheet-metalworking processes. Although traditional sheet-metal cutting equipment still holds a significant market share, each of them also boasts its own unique advantages.
However, compared to modern processes such as laser cutting, these methods have obvious disadvantages that significantly undermine the competitiveness of enterprises. (CNC) shearing machines are primarily designed for straight cuts and can only be used for sheet-metal processing involving straight-line cutting. (CNC/turret) punching machines have limitations when it comes to cutting steel plates thicker than 1.5 mm; moreover, they produce poor surface quality, are costly, generate high noise levels, and are not environmentally friendly.
Flame cutting, as a traditional cutting method, is suitable only for rough machining due to its limitations in terms of thermal deformation, cut width, material waste, and slow processing speed. Plasma cutting and precision plasma cutting, while similar to flame cutting, suffer from excessive thermal deformation and significant beveling when cutting thin steel plates. They are unable to meet high-precision requirements and involve relatively expensive consumables.
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