Results 251 to 260 of about 205,612 (304)

Micromachined Electrophoresis Chips with Thick-Film Electrochemical Detectors

Analytical Chemistry, 1999
A capillary electrophoresis (CE) microsystem, based on the combination of microphotolithographically fabricated separation chips and thick-film electrochemical detector strips, is described. The microsystem consists of a planar screen-printed carbon line electrode mounted perpendicular to the flow direction.
J, Wang, B, Tian, E, Sahlin
openaire   +2 more sources

Degradation Analysis of Thick Film Chip Resistors

International Symposium for Testing and Failure Analysis, 2009
Abstract Negative resistance drift in thick film chip resistors in high temperature and high humidity application conditions was investigated. This paper reports on the investigation of possible causes including formation of current leakage paths on the printed circuit board, delamination between the resistor protective coating and laser
Bhanu Sood, Diganta Das, Michael H. Azarian, Michael Pecht   +3 more
openaire   +1 more source

An Alternative Approach to Compute Chip Thickness in Milling

Journal of Manufacturing Science and Engineering, 2022
Abstract The accurate evaluation of the instantaneous undeformed chip thickness (IUCT) plays a crucial role in the modeling of milling processes. However, the vibrations of the tool–workpiece system can make conventional IUCT models either inaccurate or not applicable. This paper introduces the concept of surface function to describe the
Chen, Kaidong, Zhang, He, van de Wouw, Nathan, Detournay, Emmanuel   +3 more
openaire   +1 more source

Chip Formation With Varying Undeformed Chip Thickness at Very Slow Speed

Journal of Engineering for Industry, 1964
Steel S.A.E. 1112 cold rolled specimen was cut orthogonally at slow speed of 0.625 ipm, and the shear plane formation was examined from a series of photographs taken during a cut for cutting triangular wavy surface and for the case where the straight surface is cut by the tool moving along the triangular wavy path.
Shiro Kobayashi, A. Shabaik
openaire   +1 more source

Thick film chip resistors as millikelvin thermometers

Cryogenics, 1989
Abstract The results of thermal and magnetic studies of commercially available thick film chip resistors are reported. Resistors with room temperature values of 1 kΩ and 500 Ω have been investigated down to 30 mK, and the magnetoresistance of a 1 Ω resistor has been studied in fields up to 8 T. In addition, the heat capacity of the 1 Ω units has been
M.W. Meisel, G.R. Stewart, E.D. Adams
openaire   +1 more source

The Role of Chip Thickness in Grinding

Journal of Fluids Engineering, 1956
Abstract Grinding chips are classified into five types depending upon their relative thickness-to-length ratio and equations are derived for computing the length or thickness of chips of all types for external, surface, internal, and plunge-grinding operations.
G. S. Reichenbach, J. E. Mayer, S. Kalpakcioglu, M. C. Shaw   +3 more
openaire   +1 more source

Improved chip thickness model for serrated end milling

CIRP Journal of Manufacturing Science and Technology, 2019
Abstract This paper presents an improved chip thickness model for serrated end mills that accounts for the actual trochoidal path traced by the tooth. The model includes the influence of radial run-out on teeth. We also present a method to infer radial run-out on serrated tools using a combination of measurements and scanned geometry of the serration
Pritam Bari, Mohit Law, Pankaj Wahi
openaire   +1 more source

Multiscale Predictive Modelling of Critical Undeformed Chip Thickness

2021
Predictive modelling of critical undeformed chip thickness (tc) is important for ultra-precision machining of brittle materials in a ductile mode. This paper presents a hierarchical multiscale modelling approach that is capable of quantitatively predicting the variation of tc with crystal orientation. The proposed multiscale modelling approach consists
Xuezhen Wang, Daiyi Mo, Shifei Zhang, Fanbiao Bao   +3 more
openaire   +1 more source

Shear Angle Relationship With Variable Undeformed Chip Thickness

Journal of Engineering for Industry, 1974
Effect of surface slope of the workpiece on shear angle has been considered by applying Hill’s [1] deformation criteria to the triangular shear zone in orthogonal metal-cutting process with variable undeformed chip thickness. It is shown that the variation of the shear angle with the surface slope δ can be written in the form φ = φ0 + Cδ where “C” is ...
G. S. Kainth, R. C. Gupta
openaire   +1 more source

Determination of Minimum Uncut Chip Thickness in Micromachining

Advanced Materials Research, 2009
In micromachining, the uncut chip thickness is comparable to the tool edge radius, and chip won’t be generated if the uncut chip thickness is less than a critical value, besides that, the minimum uncut chip thickness affect many factors such as the cutting force, the chip’s modality, the cutting surface quality, etc. In this paper, a geometric model is
Zhen Yu Shi, Zhan Qiang Liu
openaire   +1 more source