The manufacture of parts made of metal sheet often includes two successive processes: the cutting process at which a guillotine shear cuts the sheet into strips, and the punching process at which a stamping press punches out the blanks from the strips. This paper presents an algorithm for generating optimal two-staged cutting patterns of strips for the cutting process. At the first stage the sh...

The dimensional analysis of the initial parameters coordinated dimensions holes is presented. Issues related to assessment accuracy location surfaces deep are considered. influence various technological factors on magnitude scattering studied. Experimental studies using experimental design methodology, which was used for sample preparations 45 steel, cast iron SCH15, aluminum alloys. Factors su...

“The purpose of this project is to determine if a v i d e o b a s e d method of determining runto-cut style type is as accurate as the pattern determined through the kinetic method.” Non-contact anterior cruciate ligament (ACL) injuries are common among both elite and recreational athletes. Research shows that such non-contact knee ligament injuries typically involve sudden changes in direction...

In this study, ultrasonic assisted machining (UAM) technique is applied in side-surface milling experiment for glass-ceramic workpiece material. The tungsten carbide cutting-tool with diamond coating is used in conjunction with two kinds of cooling/lubrication mediums such as water-soluble (WS) cutting fluid and minimum quantity lubricant (MQL). Full factorial process parameter combinations on ...

Ball-end cutters are widely used in industries of dies, molds, and aerospace, which have the problem poor machined surface quality due to low cutting speed near tool-tip. With increase complexity parts, it will become more difficult avoid tool-tip participating cutting. In this paper, velocity effect sensitivity ball-end cutter is analyzed, several key positions, including intersection points C...

Cutting sticking operation is essential on a chrysanthemum production to enhance its productivity, since many cuttings can be obtained from one mother plant. Usually, human being manually sticks the cuttings to plug tray, however, it takes a lot of time and much labor, since the number of cuttings is said to be about 200 million in a district where yields the highest number of chrysanthemums in...

the implementation of different silvicultural systems can be effective on different characteristics of forest stands, such as stand structure and diameter distribution of trees. this study was carried out in shafaroud forests of gilan province of northern iran. the objectives of this research were 1) to evaluate the suitability of different probability distribution functions, including weibull,...

Effects on the mechanical strength of poly-L-lactic acid (PLLA) upon irradiation with 150 keV He(+) ion were studied. Changes in the irradiated surface were investigated using a surface texture and contour measuring instrument and an atomic force microscope. Observations made with the atomic force microscope revealed that the irradiated surface subsided significantly as the fluence increased. I...

This paper describes the methods using bonded cup wheels for grinding toroidal and cylindrical SiC mirrors with large curvature radii. Since the angle between the cutting direction of bonded abrasives and feed direction of the cup wheel is about 90 °, it is possible to obtain a surface with very low surface roughness independent of the direction of measurement. Toroidal mirrors, circular and el...