Results 251 to 260 of about 13,005 (292)

Bulgur milling using a helical disc mill

Journal of Food Engineering, 2008
Abstract In the present study, a helical disc mill was used to mill bulgur. Screen analysis (%), colour (lightness, redness, yellowness and yellowness index), yield, loss, energy consumption, capacity, hectolitre-weight (bulk density), ash, and moisture contents of bulgur were followed at the different disc gaps (1.9, 1.6, 1.3, 1.2, 1.0, 0.8, 0.6, 0 ...
Ali Yıldırım, Mustafa Bayram, Mehmet D. Öner   +2 more
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Modal Analysis of Helical Milling Unit

Advanced Materials Research, 2012
Based on the analysis of the working principle and structure characteristics of helical milling unit, the prototype’s three-dimensional model was built, the prototype’s finite element modal analysis was conducted, and the first 6 natural frequencies and their mode shapes were obtained.
Xu Da Qin, Cui Lu, Qi Wang, Hao Li, Lin Jing Gui   +4 more
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Study on micro helical milling of small holes with flat end mills

The International Journal of Advanced Manufacturing Technology, 2018
Helical milling as an eco-friendly hole-making process has various advantages comparing to conventional drilling process and has been widely studied. But micro helical milling for small holes was not investigated. This paper focuses on preliminary studies on micro helical milling of small holes with flat micro end mills.
Xiang Cheng, Xi Zhang, Yebing Tian, Guangming Zheng, Xianhai Yang   +4 more
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Power and Forces in Milling S.A.E. 3150 Steel With Helical Mills

Journal of Fluids Engineering, 1937
Abstract This paper outlines a series of tests conducted on a milling machine using slab mills of similar construction except for variation in rake angle, when milling an S.A.E. 3150 steel. The cutters had rake angles of 20, 15, 10, and 5 deg as variables, but otherwise were 3 in. in diameter, and had 12 teeth on a 25-deg left-hand helix.
O. W. Boston, W. W. Gilbert, K. B. Kaiser   +2 more
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Reduction mills in helical rolling

Steel in Translation, 2009
The use of helical reduction mills is considered. Their scope in terms of rolling speed and deformation is assessed. The design and application of such mills is analyzed. A refined method is proposed for determining the width of the contact surface and the energy parameters. Experimental data are presented.
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A Comparative Study of Helical Polygonal Turning and Helical Peripheral Milling in a Turn Mill

Volume 2: Manufacturing Equipment and Automation; Manufacturing Processes; Manufacturing Systems; Nano/Micro/Meso Manufacturing; Quality & Reliability
Abstract Traditionally, the milling process is adopted to machine polygonal geometries from a cylindrical bar on a Sliding Head Turn-Mill Center. In the case of titanium implants, machining helical geometries with polygonal cross sections is time-consuming. However, to meet increasing demand, faster cycle times become a crucial parameter
Madhur Pandya, Mohit Agarwal, Dhruv Narayan Mudgal, Srivastava, Alok, N. Bhatnagar   +4 more
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Prediction of heat transfer process in helical milling

The International Journal of Advanced Manufacturing Technology, 2014
This paper represented a three-dimensional heat transfer model which describes the temperature distribution with the time variation in solid with conduction-convection boundary during the helical milling process. On the basis of the kinematic mechanisms of helical milling, two types of heat sources were presented; one was the first heat source (FTHS ...
Jie Liu, Chengzu Ren, Xuda Qin, Hao Li
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A Predictive Model for Helical End Milling Forces

Manufacturing Engineering, 2000
Abstract A predictive model for helical end milling forces is developed using a predictive machining theory, which predicts cutting forces from input data of workpiece material properties, tool geometry and cutting conditions. In the model, each tooth of a helical end milling cutter is discretizised into a number of slices along the ...
Li, H., Zhang, W., Li, X.
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Hole Quality Analysis in Helical Milling of CFRP

Applied Mechanics and Materials, 2014
Carbon fiber reinforced plastics (CFRP) are highly promising materials for the applications in the aerospace industries, but they are typical difficult-to-cut material. In order to improve the quality, helical milling technology was developed. In this study, helical milling experiments were conducted in the machining center about CFRP materials.
Hai Yan Wang, Xu Da Qin
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Analysis of Cutting Forces in Helical Milling Process

Advanced Materials Research, 2011
Helical milling is used to generate holes, in which a tool attached to the rotating spindle traverses a helical trajectory, and the diameter of holes will be larger than that of the tool. Based on the principle of helical milling, this paper establishes analytical model of cutting forces.
H.Y. Wang, Xu Da Qin, Qi Wang
openaire   +1 more source