Customized Stamping For products that require water-tight or air-tight enclosures (there are no seams), high strength and light weight, deep drawing is the best choice. Generally, this is the most effective way to form products with unconventional or difficult geometries. Knowledge About Deep Drawn Stamping There's two stages of a draw are cupping and drawing. When the punch contacts the blank, the front end of the punch first imprints the material into the mold. At this point, some stretching will occur, and the so-called "impact line" will be produced. This is a noticeable thinning area that thins around the radius of the bottom until it just enters the straight wall of the housing. Depending on the shape of the bottom, the thickness of the material on the bottom surface may still be close to the original thickness (flat bottom), or it may be thinned by stretching (spherical bottom). When the blank is drawn into the mold, the surrounding material gathers and the wall gradually thickens. When the blank is pulled closer to the shell diameter, the thickness of the material will increase by as much as 10% from the original thickness. A gap must be left for this thickening to occur so that the material will not be trapped between the punch and the die. Benefits . Increase speed - draw speed is only limited by the required contact speed of the material. If multiple stretches are required to produce the finish draw, it can be performed at the same time at the transfer or progressive die station, thereby optimizing the cycle time. . Cost effective - along with the productivity savings, the cost of molds for deep drawing is also lower, usually only a set of very durable and renewable simple mold steel or cemented carbide molds, thereby reducing the need for re-molding. . Maintain tolerances - the deep drawing process is extremely repeatable and once set up, thousands of parts can be produced within strict tolerances. . Strong parts - rolled metal has a slender and cohesive grain structure. Due to the nature of the deep drawing process, the structure flows uninterrupted in the deep-drawn part, resulting in a very strong finished product. . Metal diversity - various metals can be deep drawn, providing many manufacturing options.Customized Stamping website:http://www.hrcncmachining.com/stamping/
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