NEW DIAMOND GRINDING WHEELS WITH ELECTRICALLY CONDUCTIVE CUTTING EDGES
The application of an electrically conductive diamond material to a new type of grinding wheel whose cutting edges possess electrical conductivity has been tried in this research work. Firstly, electrical discharge machining is applied on a solid surface of an electrically conductive CVD diamond film to create protrusions like cutting edges. Secondly, it is confirmed that the EDMed surface of the diamond material has an ability of stock removing when used in the form of a small lapping wheel. Thirdly, two different types of grinding wheels for micro grinding, i.e. i) a V-shaped profile wheel and ii) a micro mounted wheel, have been manufactured. And it is found that very fine V-shaped grooves can be made on a cemented carbide workpiece by using those wheels with very small wheel wear.
Development of a Grinding Wheel with Electrically Conductive Diamond Cutting Edges
This paper proposes the development of a grinding wheel with electrically conductive diamond cutting edges for coping with the various problems in precision grinding, especially for optical uses, where grinding wheels with uniform protrusion of very fine abrasives have long been required. The concept of the new diamond grinding wheel making use of electrically conductive diamond material is depicted. The concept consists of (1) easy and precise profile forming and provision of uniform protrusion of cutting edges on the wheel by using electrodischarge machining, (2) realization of a very high concentration of diamond cutting edges by using an electrically conductive CVD diamond film, (3) correspondence to both micro cutting edges and large chip pockets, (4) sensing of cutting edge tip by utilizing low specific resistance of the electrically conductive diamond, and (5) grinding of ferrous materials by utilizing the higher thermal stability temperature of the electrically conductive diamond. Various types of the new diamond wheel and their manufacturing procedures are introduced. They are classified into (1) a bondless solid-diamond grinding wheel and (2) a bonded diamond-grit grinding wheel. Experiments carried out for forming the cutting edges on an electrically conductive CVD diamond thick film by using EDM are presented. It was found that the fine and regulated rugged surface is formed on the diamond test piece, which may be suitable for efficient precision grinding. A small cup shape diamond grinding wheel using a solid-diamond segment is manufactured. It was found that the prototype diamond grinding wheel possesses an expected grinding ability for grinding cemented carbide tool materials. The surface roughness values of the ground workpiece measured are Ry=0.110 /m and Ra=0.008 /m. The results proved that the electrically conductive CVD diamond thick film after controlled EDM can be used for the grinding purpose.
Study on workspace analysis and simulation of 6-DOF painting robot based on monte-carlo method
Comparing recent kinds of methods working on robot workspace when we design to calculate the workspace of 6R painting robot,we bring Monte-Carlo method to analysis the workspace according to the actual working condition. With robot Tool Center Point(TCP) position aggregate via the solution of forward kinetic equation,Monte-Carlo method analysis and simulate painting robot workspace efficiently.