Sheet metal stock is stretched around a plug to create deep draw forming parts using conventional tool and die technology. The blank, a stretched sheet metal stock, is stretched around a plug in a hydraulic or mechanical press using conventional tool and die technology. The blank is stretched using ring-shaped tool surfaces to trap the edges while allowing them to slide. The blank holder is positioned on one side of the blank, and the forming die is positioned on the other side. The plug passes through the blank holder ring into the cavity of the die ring at the desired depth to create the desired end shape. The part dimensions are calculated based on the plug form, die shape, and how deep the part is drawn. To make fatigue-resistant parts and to ensure uniform metal thickness, metal spinning is preferred over conventional draw forming for applications such as enclosures, cans, cups, canisters, containers, covers, motor shrouds, tanks, and shells.
Our presses can create “Pre-forms” or preliminary part formings that can be used to ease metal spinning and allow us to create more complex shapes, ensuring the highest quality parts using this method. We can also use this process to minimize material strain by using the best aspects of each process. By combining deep drawing and metal spinning into one procedure, we can create parts that deep drawing or spinning alone might not be able to fabricate.
718 inconel, and stainless steel series 304, 304 DDQ, 316, 410, and 430 are used to create custom parts. With a punch force of up to 368 t and a pressure of 10 ksi, our state-of-the-art equipment creates custom parts with tolerances of +/-.020 in and +/-.030 in., with +/-.010 in in certain situations. The maximum punch diameter is 12 in, and blank diameters may reach 15 in. Hydroform drawn parts of up to 7 in. in height can be created. If the part requires a hole, a stamped feature, a welded fitting, or metal polishing, you may also save time and money by taking advantage of our secondary stamping, spin forming, machining, welding, and metal finishing services.
The drawing process is affected by the properties of materials. For example, brittle and non-ductile materials cannot be drawn at room temperature. When drawing, tempering (hardening) and/or strain hardening Alumina and steels (DQ or Deep Draw Quality steels, stainless steels, and ‘O’ condition Alumnium) are preferred because they are more formable. DQ material and formable tempers are generally more stable, possess smoother grain structure, and offer higher elasticity, which in turn makes the material easier to form and lessens die wear and maintenance over time.