Papers by Keyword: Planer

Abstract: The paper analyzed the key of the improved design of the big center distance planer double-enveloping worm pair. And the manufacture technology and method of the big center distance planer double-enveloping worm pair is introduced, too.

Abstract: In centerless grinding machine, piston pin is not convenient for online detection. It is better to be tested and sorted by automatic sorting mechanisms. The piston pin automatic sorting system designed in the paper is a machine based on the detection results to shunt qualified product, nonconforming product and waste automatically. Graph of movement, tree graph of function and morphological matrix charts are mapped, the mechanical movement scheme is determined. Further, the machine is drawn in three-dimensional form. It can shunt product automatically

Abstract: Diamond tools wear easily under cutting tungsten carbide. To clarify the wear mechanism, the authors composed a temperature-measurement system of a cutting point using a dual-colorinfrared pyrometer and performed planing experiments. Infrared rays, emitted from the contact point between a mono-crystal-diamond tool and a cobalt-free tungsten carbide, are transmitted though the diamond tool and an optical fiber and then they are detected by the pyrometer. Before the planing experiments, rubbing experiments were performed using a mono-crystal-diamond stick and a tungsten-carbide disk. The effects of gas environments and rubbing conditions on contact-point temperature, friction coefficient, and diamond wear were experimentally investigated. Planing experiments of the tungsten carbide using mono-crystal-diamond tool, were performed. The effects of planing conditions and gas environments on cutting-point temperature and tool wear were investigated. Through the experiments the following results were obtained. Rubbing and cutting point temperature is the highest in Argon gas followed by Nitrogen gas and is the lowest in Air. Diamond-tool wear is the greatest in Argon gas, less in Nitrogen gas, and the least in Air. The reason for this is that a chemically or physically absorbed layer of oxygen or nitrogen on tungsten carbide acts as a lubricant at the contact point. Cutting-point temperature was in proportion to cutting speed. The temperature under cutting speed at 90m/min and cutting depth at 1.0μm in Air was approximately 170degrees Celsius.