Stamping

About: Stamping is a research topic. Over the lifetime, 22501 publications have been published within this topic receiving 83554 citations.

Stamping and forming machine having toggles for reciprocating the tooling assemblies

Abstract: Stamping and forming machine (2) of the type having opposed tooling assemblies (22,22′) which are reciprocable towards and away from each other has toggle mechanisms (28,28′) for moving the tooling assemblies (22,22′) along their paths of reciprocation. Each toggle mechanism has one toggle link (30,30′) pivoted to a tooling assembly (22,22′) and another toggle link (32,32′) pivoted at a fixed pivot location (38,38′). The fixed location pivots (38,38′) are adjustable (62,62′) in order to control the position of the tooling assemblies when they are in their closed positions. Additionally, an adjustable wear plate (18) is provided in the passageway (8) in which the tooling assemblies (22,22′) are mounted. Advantages achieved include reduced manufacturing cost for the machine, potential for high operating speeds, and compactness when desired.

Application of a Uniform Pressure Actuator for Electromagnetic Processing of Sheet Metal

Abstract: High-velocity electromagnetic sheet-metal forming and processing has many potential advantages over more conventional techniques, including: higher-forming limits, resistance to wrinkling and springback, one-sided tooling, and physical contact to only one side of the work piece. Traditional electromagnetic actuators are flat spirals that produce a nonuniform pressure distribution, limiting the types of parts that can be formed. A new type of electromagnetic actuator, the uniform pressure (UP) actuator, has been developed. The UP actuator can uniformly and efficiently accelerate conductive sheet metal to velocities on the order of 200 m/s or greater over distances of a few millimeters. When the material is arrested by impact with a tool, high-forming pressures can be imparted to it. The utility of the UP actuator is illustrated here by demonstrating its ability to form sheet metal components with intricate shape, to shock harden, and also to pick up nearly arbitrarily small details from a die surface. Thus, electromagnetic processing with the use of the UP actuator offers the unprecedented ability to simultaneously form and engineer the surface morphology and microstructure of sheet metal samples.

High Resolution Printing of DNA Feature on Poly(methyl methacrylate) Substrates Using Supramolecular Nano-Stamping

Abstract: In recent years, a large number of devices based on organic and biological materials have been developed. To scale-up the production of these systems to industrially acceptable standards, there is a need to develop soft-material stamping approaches with the needed resolution, complexity, and versatility. We have recently developed a DNA-based stamping method (supramolecular nano-stamping, SuNS) that has superior resolution and can print multiple molecules at the same time. A similar technique was independently developed by Crooks and co-workers. Here we show that SuNS can be used to efficiently print DNA features on a polymeric substrate (poly(methyl methacrylate), PMMA) with a 40 nm point resolution and a coverage that exceeds 100 mum2. The stamped PMMA substrate was also used as a master to print on a gold substrate. With PMMA being optically clear and electrically insulating, future applications of SuNS to print DNA micro- and nanoarrays are envisioned.

Coated steel strips, methods of making the same, methods of using the same, stamping blanks prepared from the same, stamped products prepared from the same, and articles of manufacture which contain such a stamped product

Abstract: Coated steel having a well defined and uniform thickness is useful and advantageous for preparing products by hot stamping Products prepared by hot stamping such a steel are particularly advantageous when subjected to a subsequent spot welding step