Stamping

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

Low Temperature Warm Forming of Magnesium ZEK 100 Sheets for Automotive Applications

Abstract: Cosma R&D investigated a low temperature warm forming process by which a magnesium ZEK 100 door inner part with a single-stage draw depth of 144 mm was successfully formed. The warm forming process is comprised of three steps: 1) heating pre-lubricated blanks in an oven at temperatures ranging from 215°C to 260 °C, 2) robotic transfer of the heated blank to a mechanical stamping press, 3) forming of the panel in room temperature stamping die at speed of about 160 mm/s. The effect of process parameters on the formability of the part, as well as, the post-forming properties including the mechanical properties, microstructure evolution and deformation thinning are also presented. The result indicates that Magnesium ZEK 100 exhibits superior low temperature warm formability over Magnesium AZ31B, and the developed warm forming process is promising and potential for volume production of magnesium automotive parts.

An integrated CAPP/CAM system for stamping die pattern machining

Abstract: Since the early 1980s, CAPP has been expected to bridge the gap between CAD and CAM. Though numerous research works on CAPP have been reported, it is not easy to find a commercial CAPP system applicable to complicated objects with freeform shapes such as mold and die. The dependency on CAM system is holding one leg of CAPP, while the complexity of the solution space in freeform shape machining has a tight grip on the other. This paper exemplifies that these obstacles on the CAPP bridge can be overcome by the integration with CAM and by focusing on a specific application area. Major components of a staming die for the car body panel are manufactured by machining the raw stock castings, which are usually made by the lost foam casting process. Die pattern is the lost foam pattern made of Styrofoam for the raw stock casting. The industry trend is to build die patterns by CNC machining. In this paper, a highly specialized CAPP/CAM integrated system, called Generative Pattern Machining (GPM), for automatic tool paths generation to cut die pattern from the CAD model of the stamping die is described. The overall structure and the detailed steps of GPM are explained. GPM is being used by DaimlerChrysler pattern shop very successfully.

Ordered Topographically Patterned Silicon by Insect-Inspired Capillary Submicron Stamping

Abstract: Insect-inspired capillary submicron stamping and subsequent surface-limited metal-assisted chemical etching (MACE) with ammonium bifluoride as a HF source are employed for the high-throughput production of ordered topographically patterned silicon (tpSi). Insect feet often possess hairy contact elements through which adhesive secretion is deployed. Thus, arrays of adhesive secretion drops remain as footprints on contact surfaces. Stamps for insect-inspired capillary submicron stamping having surfaces topographically patterned with contact elements mimic the functional principles of such insect feet. They contain spongy continuous nanopore networks penetrating the entire stamps. Any ink (organic or aqueous) may be supplied from the backside of the nanoporous stamps to the contact elements. We generated ordered arrays of submicron AgNO3 dots extending square millimeters on Si by manual stamping with cycle times of a few seconds under ambient conditions; at higher load, ordered holey AgNO3 films were obtaine...

High strength hot rolled steel sheet having excellent stamping workability and its production method

Abstract: PROBLEM TO BE SOLVED: To provide a high strength hot rolled steel sheet in which the defect in the stamped edge faces generated at the time of stamping is prevented, and having a strength of ≥690 MPa, and having excellent hole expansibility and ductility, and to provide its production method. SOLUTION: The high strength hot rolled steel sheet having excellent stamping workability is composed of steel having a composition comprising 0.01 to 0.07% C, 0.01 to 2% Si, 0.05 to 3% Mn, 0.005 to 0.5% Al, ≤0.005 N, ≤0.005% S, 0.03 to 0.2% Ti and ≤0.01% P, if required, further comprising one or two kinds of metals selected from 0.01 to 0.2% V, 0.01 to 0.2% Nb and 0.01 to 0.2% Mo, and the balance Fe with inevitable impurities, and in which a ferrite or bainitic ferrite structure is composed as a phase with the highest area ratio, and the balance being a hard secondary phase and cementite in ≤3% by area ratio, and has a tensile strength of ≥690 MPa. The production method uses the same. COPYRIGHT: (C)2006,JPO&NCIPI