Our 3D CAD supplier models have been moved to 3Dfindit.com, the new visual search engine for 3D CAD, CAE & BIM models.
You can log in there with your existing account of this site.
The content remains free of charge.
Licensed under Creative Commons Attribution-Share Alike 3.0 (Hans-Günter König).
This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Sine bar" – news · newspapers · books · scholar · JSTOR (June 2014) (Learn how and when to remove this template message) |
A sine bar consists of a hardened, precision ground body with two precision ground cylinders fixed at the ends. The distance between the centers of the cylinders is precisely controlled, and the top of the bar is parallel to a line through the centers of the two rollers. The dimension between the two rollers is chosen to be a whole number (for ease of later calculations) and forms the hypotenuse of a triangle when in use.
When a sine bar is placed on a level surface the top edge will be parallel to that surface. If one roller is raised by a known distance, usually using gauge blocks, then the top edge of the bar will be tilted by the same amount forming an angle that may be calculated by the application of the sine rule.
Angles may be measured or set with this tool.
For example, to measure the angle of a wedge, the wedge is placed on the upper surface of sine bar. With use of slip gauge blocks, the taper surface of wedge is made parallel to the surface plate using dial gauge. The sine of the angle of inclination of the wedge is the ratio of the height of the gauge blocks used and the distance between the centers of the cylinders.
NOTE:
The simplest type consists of a lapped steel bar, at each end of which is attached an accurate cylinder, the axis of cylinder being mutually parallel and parallel to the upper surface of the bar. In the advanced type some holes are drilled in the body of the bar to reduce the weight and facilitate handling.
A special type of sine bar is sine centre which is used for conical objects having male and female parts. It cannot measure the angle more than 45 degrees
A sine table (or sine plate) is a large and wide sine bar, typically equipped with a mechanism for locking it in place after positioning, which is used to hold workpieces during operations.
It is used to measure compound angles of large workpiece. In this case, two sine tables are mounted one over the other at right angles. The tables can be twisted to get the required alignment.
Wikimedia Commons has media related to Sine bars. |
This article uses material from the Wikipedia article "Sine bar", which is released under the Creative Commons Attribution-Share-Alike License 3.0. There is a list of all authors in Wikipedia
AutoCAD, SolidWorks, Autodesk Inventor, FreeCAD, Catia, Siemens NX, PTC Creo, Siemens Solid Edge, Microstation, TurboCAD, Draftsight, IronCAD, Spaceclaim, VariCAD, OnShape, IntelliCAD,T-FLEX, VariCAD, TenadoCAD, ProgeCAD, Cadra, ME10, Medusa, Designspark, KeyCreator, Caddy, GstarCAD, Varimetrix, ASCON Kompas-3D, Free Download, Autocad, 2D Library, DXF, DWG, 2D drawing, 3D digital library, STEP, IGES, 3D CAD Models, 3D files, CAD library, 3D CAD files, BeckerCAD, MegaCAD, Topsolid Missler, Vero VisiCAD, Acis SAT, Cimatron, Cadceus, Solidthinking, Unigraphics, Cadkey, ZWCAD, Alibre, Cocreate, MasterCAM, QCAD.org, QCAD, NanoCAD