Primary Draw Process
Primary Draw Process - Related Videos
11:57
Fabricating Metamaterials Using the Fiber Drawing Method
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Cited by 23 •
2012
Metamaterials at terahertz frequencies offer unique opportunities, but are challenging to fabricate in bulk. We adapt the fabrication procedure for microstructured polymer optical fibers to inexpensively fabricate metamaterials potentially on an industrial scale. We produce polymethylmethacrylate fibers containing ~10 μm diameter indium wires separated by ~100 μm, which exhibit a terahertz plasmonic response.
06:22
Motor Learning in Mirror Drawing
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Colloquially, the terms learning and memory encompass a broad range of behaviors and mental systems, everything from learning to tie a shoe to mastering calculus (and a lot in between). Experimental psychologists have divided up learning mechanisms into groups that seem to have different properties, and that seem to rely on different brain systems. A major division is between declarative and non-declarative memory, roughly, the...
01:16
Drawing Free-body Diagrams: Rules
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2023
The first step in describing and analyzing most phenomena in physics involves the careful drawing of a free-body diagram. Free-body diagrams are useful in analyzing forces acting on an object or system, and are employed extensively in the study and application of Newton's laws of motion. The steps to draw a free-body diagram are listed below: • Draw the object under consideration. If treating the object as a particle, represent the object as a point. Place this point at the origin of a...
05:27
Drawing Blood from Rats through the Saphenous Vein and by Cardiac Puncture
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Cited by 87 •
2007
Blood draws are necessary in a large number of studies, for example to study the pharmacokinetics profile of a compound. Here, we demonstrate how to draw blood from rats using two techniques: blood draw from the saphenous vein or by cardiac puncture.
08:30
Tissue Processing and Isolation of Primary Fibroblasts from the Human Vagina
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Cited by 1 •
2024
This protocol demonstrates a reliable and effective technique to isolate primary fibroblasts from either premenopausal or postmenopausal human vaginal tissue. Existing protocols for vaginal fibroblast isolation do not consider the challenges of cell isolation from senescent tissue. Vaginal tissue was obtained from women after pelvic organ prolapse surgery.
FAQs
Die geometry controls how the workpiece enters the smaller opening and therefore influences the force required for deformation and the resulting surface quality. Because the die establishes the reduced dimensions during the initial drawing stage, its form must be considered together with the material properties. These factors determine whether the operation produces the intended dimensional change and a suitable surface.
The die applies compressive stress as the workpiece passes through its opening, while the pulling action produces tensile stress along the elongated material. Their combined effect enables controlled plastic deformation rather than merely elastic stretching. This stress pattern allows the rod, wire, or tube to undergo a planned reduction in cross-sectional area while developing the length and mechanical condition needed for later drawing stages.
Lubrication is one of the process conditions that influences both the required drawing force and the surface quality of the finished workpiece. By affecting contact between the material and die, it helps determine how smoothly the material passes through the opening. Its role is especially important during the initial draw, when the operation establishes dimensions and surface condition for subsequent processing.
Material properties affect how the workpiece responds to the die and the combined compressive and tensile stresses. They therefore influence the force needed to produce the planned plastic deformation and the mechanical condition after the operation. Considering these properties with die geometry and lubrication helps engineers select conditions that support accurate dimensions, acceptable surface quality, and continued processing in later drawing stages.
The operation begins with a metal rod, wire, or tube prepared for entry into a drawing die. The workpiece is then pulled through the die's smaller opening, where the applied stresses reduce its cross-sectional area and increase its length. The resulting dimensions and mechanical condition provide the starting point for subsequent drawing stages.
The essential elements are a metal rod, wire, or tube, a drawing die with a smaller opening, and a means of pulling the workpiece through that opening. Lubrication is another important process condition because it influences force and surface quality. Together, these elements support controlled deformation and the production of elongated components with specified dimensions.
Engineers use the process when manufacturing elongated metal products that require accurate dimensions and a controlled surface finish. Typical product forms identified for this operation include wire, tubing, and other elongated components. It is also relevant when the initial manufacturing stage must establish a mechanical condition suitable for additional drawing stages and later dimensional refinement.