Topic
Shearing (manufacturing)
About: Shearing (manufacturing) is a research topic. Over the lifetime, 12309 publications have been published within this topic receiving 48074 citations. The topic is also known as: punching (cutting).
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TL;DR: An analysis of the chip geometry and the force system found in the case of orthogonal cutting accompanied by a type 2 chip has yielded a collection of useful equations which make possible the study of actual machining operations in terms of basic mechanical quantities as mentioned in this paper.
Abstract: An analysis of the chip geometry and the force system found in the case of orthogonal cutting accompanied by a type 2 chip has yielded a collection of useful equations which make possible the study of actual machining operations in terms of basic mechanical quantities. The shearing strain undergone by the metal during chip formation, and the velocities of shear and of chip flow are among the geometrical quantities which can be quantitatively determined. The force relationships permit calculation of such quantities as the various significant force components, stresses, the coefficient of friction between chip and cutting tool, and the work done in shearing the metal and in overcoming friction on the tool face. The experimental methods by which such analyses can be readily made are described. Observed and calculated values from typical tests are presented.
1,152 citations
Patent•
04 Dec 1995
TL;DR: A bipolar electrosurgical scissors has an improved coagulation capability as mentioned in this paper, where both poles of electrosurgery energy are exposed on the exterior surfaces of each shearing member so that the scissors can be used to coagulate tissue using only one shearing.
Abstract: A bipolar electrosurgical scissors has an improved coagulation capability. Both poles of electrosurgical energy are exposed on the exterior surfaces of each shearing member so that the scissors can be used to coagulate tissue using only one shearing member. There may be two or more electrically conductive regions on the exterior surface of each shearing member. The conductive regions may be formed by laminating, depositing, or inlaying electrically conductive material on the exterior surfaces. The conductive regions are electrically insulated from each other. In one embodiment, the shearing surfaces are also electrically conductive and are each connected to the same electrical pole. In another embodiment, the conductive material that forms one of the conductive regions on each exterior surface also extends through the shearing member to also form a conductive shearing surface.
886 citations
TL;DR: In this article, the degree of penetration, D p, was introduced as an index to describe the severity of contact and a wear mode diagram was developed to show the possible region for each wear mode of cutting, wedge forming or ploughing with parameters of D p and the shearing strength at the contact interface.
405 citations
TL;DR: In this paper, an experimental study of orthogonal cutting mechanisms was conducted in the edge trimming of unidirectional Graphite/Epoxy composite with polycrystalline diamond tools, and the effects of tool geometry and operating conditions were evaluated from an analysis of chip formation, cutting force and machined surface topography.
Abstract: An experimental study of orthogonal cutting mechanisms was conducted in the edge trimming of unidirectional Graphite/Epoxy composite with polycrystalline diamond tools. The effects of tool geometry and operating conditions were evaluated from an analysis of chip formation, cutting force and machined surface topography. All aspects of material removal were found to be primarily dependent on the fibre orientation. Discontinuous chip formation was noted throughout this study, regardless of trimming parameters. Chip dimensions and force measurements depicted a change in chip formation with fibre orientation, and the presence of three distinct mechanisms in the edge trimming of fiber reinforced composite material. A combination of cutting, shearing and fracture along the fibre/matrix interface was observed.
335 citations
Patent•
30 Mar 2001
TL;DR: In this paper, the authors used expanding baskets as cooperating radially expansible shearing members to remove clot material from the vasculature and other body lumens, and demonstrated that the struts of each basket may slide continuously across each other, and may be sufficiently aggressive for highly effective thrombectomy.
Abstract: Devices, methods, kits, and methods remove clot material from the vasculature and other body lumens. Expansible baskets may be used as cooperating radially expansible shearing members. Helically oriented struts of each basket may wind in a uniform circumferential direction. The struts can be independently flexible, allowing the shearing members to flex axially together. The inner basket may be rotatably driven and may use an axial pump extending proximally from the shearing members and/or a distal penetrator for advancing into an occlusion which inhibits guidewire access. The struts may slide substantially continuously across each other, and may be sufficiently aggressive for highly effective thrombectomy.
310 citations