Curvy welded fence, also known as 3D security fence, is a kind of specially designed welded wire mesh with V-shaped bending curves in its longitudinal direction. It is made of high quality carbon steel wires where wires in the horizontal and vertical direction are welded at their junctions to provide a rigid wire mesh fence. Generally, the number of V-shaped curves varies as the height of welded wire mesh varies. Its attractive appearance, rigid structure and excellent visibility make it become a popular security fence that is widely used in railways, airports, schools, factories, residential areas, gardens, parks, sports stadiums, etc.