Volume 2 Issue 3
Authors: Hironori Matsuoka; Takahiro Ryu; Takashi Nakae; Tsukuru Kodera; Shuuichi Shutou
Abstract: This paper compares the cutting performance of minimal quantity lubrication (MQL) system with dry cutting in terms of flank wear, crater wear and finished surface roughness when using various kinds of cutting tools. Experiments were conducted by simulating hobbing by fly tool cutting on a milling machine. The results obtained are summarized as follows. (1) When using an uncoated tool, TiN- and (Al, Ti) N-coated tools without coating on the rake face, and fully TiN- and (Al, Ti) N-coated tools, MQL decreases the flank wear, crater wear and finished surface roughness compared with the wear and the roughness by dry cutting, particularly at the high cutting speed of 159 m/min. The reason suggested is the lubricating properties improved even with an extremely small quantity of cutting oil, which reduces the occurrence of deposited metal on the cutting edge. (2) With both the fully TiN- and (Al, Ti) N-coated tools, the MQL system showed better cutting performance in terms of reduced tool wear and reduced finished surface roughness compared with that by dry cutting; in particular, the fully (Al, Ti) N-coated tool is suitable for an MQL system in hobbing.
Keywords: Gear; Hobbing; MQL; Dry Cutting; Fly Tool; Flank Wear; Crater Wear; Finished Surface Roughness
Authors: J. Jr. Fiori; M. Peterson; M. A. Fiori; G. N. Colle; H. G. Riella; A. B. S. S. Neto; G. W. Duarte
Abstract: This work aims to study the influence of mass flow and mold temperature in the mechanical properties of RHA/PP composites using, as parameter, the crystallinity degree of the composite. The samples were obtained following a statistical experimental factorial planning, in which it was ranged the mass flow and mold temperature. The samples underwent tensile and bending tests, DSC and SEM in order to verify the mechanical and morphological properties. The results of mold temperature showed significance in the crystallinity degree of the composite matrix. And both mold temperature and mass flow are significant for the mechanical properties of the composite.
Keywords: Rice Husk Ash; Polymer Composite; Mechanical Properties; Injection Parameters; Statistical Experimental Factorial Planning
Authors: Fumiaki Takeda
Abstract: In the agricultural market, uniform appearance quality of products is becoming more important. In this paper, we propose a total surface inspection and sorting system of an oval-shaped agricultural product for the fully automated ranking operation under the uniform criteria. The system consists of a conveyance part, an image acquisition part, and a classification part. The conveyance part uses a sensor-driven independent driving system, which is constructed by three sets of the “V shape” arranged belt conveyors. In the image acquisition part, photographs of the object are taken from six different angles simultaneously. The classification part identifies the size, shape, and damage existence of the object. The experiment is performed using red peppers as an example of the oval-shaped agricultural product. This experiment is to confirm the effectiveness of conveyance and classification performance of the system and to make possible latent problems tangible. Furthermore, we newly adopt a sequence photographs camera for high-speed acquisition of the image. So we design a prototype of the industrial use with knowledge of the proposed system. We also refer to its feasibility of the practical use.
Keywords: Surface Inspection; Oval-shaped Agricultural Product; Image Processing; Ranking; Reflection
Authors: Weixiao Du; Zhongde Shan; Feng Liu
Abstract: Impregnation quality is critical to the whole composite part. To improve it in a novel way, the infusion from both inside and outside at same time is introduced. Pores parameters are valuable during process for its special structure. To determine pores factors influence on cycle filling time, different strategies of pores depth along the tube, the tubes location and arrangement with pores in the preform are analyzed and studied. Conclusions showed that with greater depth of pores in the preform, the cycle filling time will be shorter. Comparison of filling time of tubes with pores situation strategies indicated that distance from resin source is a key factor to filling process. If the assembly makes the fibers in the preform nearest to the resource or pressure gradient field distribution uniform, the cycle filling time will be shorter.
Keywords: Impregnation Quality; the Infusion from Both Inside and Outside at Same Time; Pores Parameters, Pores Depth; Tubes Location and Arrangement with Pores