scholarly journals Theoretical considerations concerning the profile error of the thread flank

2018 ◽  
Vol 178 ◽  
pp. 01006
Author(s):  
Laurenţiu Slătineanu ◽  
Oana Dodun ◽  
Irina Beşliu Băncescu ◽  
Ionel Coman ◽  
Adrian Ghionea ◽  
...  
Keyword(s):  
Analytical Method ◽  
Cylindrical Surface ◽  
Cutting Tool ◽  
Simplified Model ◽  
External Diameter ◽  
Profile Error ◽  
Tool Edge ◽  
Theoretical Considerations ◽  
The Way

In the case of metric thread, a possible source of the flank error could be the position of the cutting tool edge, which could not intersect the circular cylindrical surface axis. An analytical method of approximation was applied to model the way in which the flank error is generated by considering some geometrical conditions. A theoretical simplified model was determined to highlight the influence of the thread external diameter and of the distance between the circular cylindrical surface axis and the thread rectilinear generatrix on the profile error of thread flank.

Wear phenomenon analysis apparatus of cutting tool edge and evaluation of several tool edges

2020 ◽  
Vol 2020 (0) ◽  
pp. S13311
Author(s):  
Yuhei KATO ◽  
Hiroshi TANAKA ◽  
Yoshitsugu KAWASE ◽  
Yoichi AKAGAMI
Keyword(s):  
Cutting Tool ◽  
Tool Edge

scholarly journals A Comparison of the Probes with a Cantilever Beam and a Double-Sided Beam in the Tool Edge Profiler for On-Machine Measurement of a Precision Cutting Tool

Machines ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 271
Author(s):  
Bo Wen ◽  
Sho Sekine ◽  
Shinichi Osawa ◽  
Yuki Shimizu ◽  
Hiraku Matsukuma ◽  
...  
Keyword(s):  
Cantilever Beam ◽  
Cutting Tool ◽  
Displacement Sensor ◽  
Laser Displacement Sensor ◽  
Tool Edge ◽  
Edge Profile ◽  
Measurement Principle ◽  
Beam Type ◽  
Tool Position ◽  
Tool Cutting

This paper describes a comparison of the mechanical structures (a double-sided beam and a cantilever beam) of a probe in a tool edge profiler for the measurement of a micro-cutting tool. The tool edge profiler consists of a positioning unit having a pair of one-axis DC servo motor stages and a probe unit having a laser displacement sensor and a probe composed of a stylus and a mechanical beam; on-machine measurement of a tool cutting edge can be conducted with a low contact force through measuring the deformation of the probe by the laser displacement sensor while monitoring the tool position. Meanwhile, the mechanical structure of the probe could affect the performance of measurement of the edge profile of a precision cutting tool. In this paper, the measurement principle of the tool edge profile is firstly introduced; after that, slopes and a top-flat of a cutting tool sample are measured by using a cantilever-type probe and a double-sided beam-type probe, respectively. The measurement performances of the two probes are compared through experiments and theoretical measurement uncertainty analysis.

Research and Application on High Efficiency Reversible Cutting Technique

2004 ◽  
Vol 471-472 ◽  
pp. 825-829
Author(s):  
Wen Ge Wu ◽  
Si Qin Pang ◽  
Qi Xun Yu
Keyword(s):  
High Efficiency ◽  
Cutting Tool ◽  
Handling Time ◽  
Cutting Parameters ◽  
Machining Process ◽  
Processing Route ◽  
Rough Machining ◽  
Machined Surface ◽  
Primary Motion ◽  
The Way

Reversible cutting method is a research thesis proposed to shorten processing route, decrease tool number and handling time, increase machining efficiency. There are three movement ways, i.e. reversible feed motion, reversible primary motion and reversible composite motion. Primary motion is done by workpiece, conventional or reversible feed motion is done by cutting tool in the way of reversible feed motion, e.g. turning. Cutting velocity is passed to cutting tool, clockwise or anti-clockwise cutting movement is done by cutting tool in the way of reversible primary motion, e.g. milling, shaping, drilling (spade drill), reaming. Primary and feed motions are all reversible in composite motion, e.g. turn-milling. Chip deformation and machined surface with reversible finishing is discussed. A mechanical analysis is carried out to the workpiece deformation of slender shaft turning in normal direction and reversible direction. The result has been verified by experiments. Experimental data for the range of cutting parameters tested showed that the reversible fine machining produce the compressive residual stresses at the surface, which are critical in the performance of the machined components. Experimental research indicted that the results of micro-hardness of reversible fine machining technique are smaller than that of general fine machining show that decreased plastic deformation of the surface layer and work-hardening. It can be adopted such planning which rough machining during advance stroke and fine machining during return stroke in machining process.

1. The UK Constitution

Public Law ◽  
2018 ◽  
Author(s):  
John Stanton ◽  
Craig Prescott
Keyword(s):  
Final Section ◽  
System P ◽  
The Uk ◽  
Theoretical Considerations ◽  
The Way

This chapter provides an introduction to the UK Constitution and sets out a foundation upon which discussions in later chapters further develop. It starts by exploring definitions of constitutions, placing the unique UK system within commonly accepted themes and characteristics. It then moves to explain the nature and form of the UK Constitution and some of the sources of which it is constructed, as well as exploring some of the more theoretical considerations as regards its character, including the way in which it is legitimised. The final section entertains academic questions concerning whether or not the UK can be said to have a constitution, including discussion of the case for and against a codified system.

An Investigation of Lateral Surface Hardness and Related Cutting Forces in One-Directional Ultrasonic-Vibration Assisted Turning

2012 ◽  
Vol 445 ◽  
pp. 1041-1046
Author(s):  
Hamed Razavi ◽  
Mohammad Javad Nategh ◽  
H. Soleimanimehr
Keyword(s):  
Cutting Force ◽  
Lateral Surface ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Surface Hardness ◽  
Tangential Direction ◽  
Feed Speed ◽  
Machined Surface ◽  
Average Force ◽  
Tool Edge

The experimental investigation of UAT shows that the movement of cutting tool edge relative to the workpiece results from the cutting speed, feed speed and tools vibration in tangential direction affects the lateral machined surface of workpiece and leaves a repeating pattern of toothed regions on it. In UAT process, because of constant feed rate of tool toward workpiece, the cutting tool never separates from workpiece, though the tool rake face may separate periodically from chip in every cycle of vibration. This results in an increase in the surface hardness of the lateral machined surface in comparison with conventional turning (CT). The results of the present study confirm the advantage of UAT as far as the lower cutting force is concerned compared with CT. The higher surface hardness of the lateral surface observed in UAT causes the maximum cutting force to increase but the average force decreases with respect to CT.

Development of Technological Means for Formation of Multilayer Composite Coatings, Providing Increased Resistance of Carbide Tools, for Different Machining Conditions

2013 ◽  
Vol 581 ◽  
pp. 55-61 ◽  
Author(s):  
Vladimir P. Tabakov ◽  
A.S. Vereschaka
Keyword(s):  
Rational Choice ◽  
Tool Life ◽  
Cutting Tool ◽  
Composite Coatings ◽  
Multilayer Coating ◽  
Multilayer Composite ◽  
Carbide Tool ◽  
Carbide Cutting Tool ◽  
Tool Edge ◽  
Technological Means

The present work documents the results of development a methodological and technological means for the formation of multilayer composite coatings essential to increasing the tool life of a cemented carbide cutting tool edge. A methodology, based on of a rational choice of structure, architecture, and properties of a multilayer coating for tool edge working in various cutting conditions, is formulated. The results demonstrate an increase of efficiency of the carbide tool edge life based on the methodology stated above, and are presented here.

Theoretical Considerations on the Way to Becoming a Psychotherapist

2017 ◽  
Vol 61 (0) ◽  
pp. 119-0
Author(s):  
Andrea Rosa
Keyword(s):  
Psychology Students ◽  
Ethical Challenge ◽  
Narrative Approach ◽  
Human Relations ◽  
Shared Experience ◽  
Theoretical Approaches ◽  
The Relationship ◽  
Theoretical Considerations ◽  
Psychotherapeutic Training ◽  
The Way

This paper aims to recount a shared experience of some psychology students – an intellectual adventure of exploring one’s own approach towards human relations and nature on the way to becoming a psychotherapist. To become practitioners, the students need to choose a certain psychotherapeutic training based on one of the main psychotherapeutic theoretical approaches. The following are mentioned in this paper: psychoanalysis, cognitivebehavioral therapy, humanistic/existential and the postmodern narrative approach. Exploring the assumptions underlying different modalities and practices is also considered here to be an ethical challenge. It is reckoned that the choice of a specific psychotherapeutical practice bound to a theory shapes the identity of the therapist and the patients, forms the language and behaviour through which the future therapist will express his own Self and influence the Other. Referring to postmodern inspirations, the author speaks in favour of making an endless effort of recognizing the assumptions underlying different practices – as the only way for not taking a potentially violent and impervious attitude in the relationship between the therapist and the patient.

A New Method for Copper Spherical Surface Lathing with High Speed Steel Cutting Tool

2015 ◽  
Vol 667 ◽  
pp. 3-8
Author(s):  
Ze Fei Chen ◽  
Lang Zhang
Keyword(s):  
Surface Roughness ◽  
Cylindrical Surface ◽  
Cutting Tool ◽  
Spherical Surface ◽  
Cutting Edge ◽  
Good Effect ◽  
Cutting Depth ◽  
Edge Angle ◽  
Cutting Path ◽  
Cutting Point

On the basis of uneven copper surface roughness during lathering in common CNC lather, analyze the cutting ways of copper spherical surface and the cutting layer different from cylindrical surface lathing. The cutting direction of cylindrical surface lathing is constant, and its cutting layer is too. However, the direction of spherical surface lathing varies along the tangent of its cutting point continually, and the working cutting edge angle and the working minor cutting edge angle of the cutting tool vary too, so the theoretical surface roughness is affected. The cutting layer of spherical surface lathing varies continually, so does the cutting depth of its every cutting point. Through analysis and experiments, prove that cutting force variety is caused by the gradient variety of cutting depth, which leads to increase of the surface rough and its unevenness. Based on the research result, design some new cutting path to improve the surface roughness of copper spherical surface lathing, and obtain good effect.

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