Results 201 to 210 of about 2,129 (236)

Helical milling of CFRP–titanium layer compounds

CIRP Journal of Manufacturing Science and Technology, 2008
Helical milling is used to generate boreholes by means of a milling tool being operated on a helical path into the workpiece. The bore diameter can be adjusted through the diameter of the helical path. In comparison to conventional drilling operations this process often results in lower burr formation and fiber delamination.
Denkena, Berend, Boehnke, D., Dege, Jan Hendrik   +2 more
exaly   +2 more sources

Geometrical texture and surface integrity in helical milling and ultrasonic vibration helical milling of Ti-6Al-4V alloy

Journal of Materials Processing Technology, 2020
Abstract Surface integrity of hole-making for Ti-6Al-4 V alloy is very important due to its application in aviation industry. Geometrical and mechanical behaviors of machined holes by helical milling (HM) and ultrasonic vibration helical milling (UVHM) were investigated.
Guang Chen, Yunhe Zou, Xuda Qin
exaly   +2 more sources

Prediction of cutting forces in helical milling process

International Journal of Advanced Manufacturing Technology, 2011
The prediction of cutting forces is important for the planning and optimization of machining process in order to reduce machining damage. Helical milling is a kind of hole-machining technique with a milling tool feeding on a helical path into the workpiece, and thus, both the periphery cutting edges and the bottom cutting edges all participated in the ...
Xuda Qin, Chengzu Ren, Qin Xuda
exaly   +2 more sources

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source