scholarly journals Research on an Ultrasonic Cutting Device Based on 0Cr18Ni9

2018 ◽  
Vol 2018 ◽  
pp. 1-15
Author(s):  
San Hongjun ◽  
Yongxia Zhang ◽  
Mingfang Chen ◽  
Hao Wu
Keyword(s):  
Precision Machining ◽  
Two Dimensional ◽  
Nodal Plane ◽  
Frequency Tracking ◽  
The Relationship ◽  
Cutting Experiments ◽  
Ultrasonic Cutting ◽  
Quality Tool ◽  
Lathe Tool

For precision machining of 0Cr18Ni9, a two-dimensional ultrasonic cutting device is studied, which is composed of an elliptical ultrasonic vibration-working head and a two-dimensional high-power ultrasonic driving system. The working head is designed according to the size of the lathe tool post. The flange is designed in the nodal plane, and the ultrasonic oscillator is fixed in the flange plate, which can reduce the mechanical loss of vibration. The drive system can realize the linkage amplitude and synchronous control of the two arms. The speed of the synchronous frequency tracking is fairly fast, and the precision is satisfactory. The vibration shape of the working head can be arbitrarily set, and the vibration shape is stable. Through the cutting experiments of 0Cr18Ni9, the relationship between the speed of cutting line and the quality of cutting and the relationship between the vibration shape and the cutting quality, tool wear, and chip are all analyzed.

scholarly journals A Self-Established “Machining-Measurement-Evaluation” Integrated Platform for Taper Cutting Experiments and Applications

Micromachines ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 929
Author(s):  
Xudong Yang ◽  
Zexiao Li ◽  
Linlin Zhu ◽  
Yuchu Dong ◽  
Lei Liu ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Precision Machining ◽  
Two Dimensional ◽  
Dimensional Image ◽  
Two Dimensional Image ◽  
Integrated Platform ◽  
Hard And Brittle Materials ◽  
Ultra Precision ◽  
Cutting Experiments

Taper-cutting experiments are important means of exploring the nano-cutting mechanisms of hard and brittle materials. Under current cutting conditions, the brittle-ductile transition depth (BDTD) of a material can be obtained through a taper-cutting experiment. However, taper-cutting experiments mostly rely on ultra-precision machining tools, which have a low efficiency and high cost, and it is thus difficult to realize in situ measurements. For taper-cut surfaces, three-dimensional microscopy and two-dimensional image calculation methods are generally used to obtain the BDTDs of materials, which have a great degree of subjectivity, leading to low accuracy. In this paper, an integrated system-processing platform is designed and established in order to realize the processing, measurement, and evaluation of taper-cutting experiments on hard and brittle materials. A spectral confocal sensor is introduced to assist in the assembly and adjustment of the workpiece. This system can directly perform taper-cutting experiments rather than using ultra-precision machining tools, and a small white light interference sensor is integrated for in situ measurement of the three-dimensional topography of the cutting surface. A method for the calculation of BDTD is proposed in order to accurately obtain the BDTDs of materials based on three-dimensional data that are supplemented by two-dimensional images. The results show that the cutting effects of the integrated platform on taper cutting have a strong agreement with the effects of ultra-precision machining tools, thus proving the stability and reliability of the integrated platform. The two-dimensional image measurement results show that the proposed measurement method is accurate and feasible. Finally, microstructure arrays were fabricated on the integrated platform as a typical case of a high-precision application.

Development of the Two-Dimensional Ultrasonic Cutting System Based on the Mechanism of Single-Excitation Elliptical Vibration by Means of Opening Chutes on the Horn

2016 ◽  
Vol 693 ◽  
pp. 1272-1278
Author(s):  
Jie Li ◽  
Feng Jiao ◽  
Ying Niu ◽  
Long Fei Shi
Keyword(s):  
Cutting Force ◽  
Ultrasonic Vibration ◽  
Two Dimensional ◽  
Vibration Cutting ◽  
Elliptical Vibration ◽  
Cutting Experiments ◽  
Cutting System ◽  
Ultrasonic Vibration Cutting ◽  
Ultrasonic Cutting ◽  
Force Characteristics

Based on the mechanism of single-excitation elliptical vibration by means of opening chutes on the horn, a novel two-dimensional ultrasonic cutting system was developed. Vibration characteristics of the two-dimensional ultrasound cutting system were researched and the longitudinal and bending amplitude of the system with different number of chutes were obtained. By using developed two-dimensional ultrasonic vibration cutting systems, series of cutting experiments were carried out and cutting force characteristics were researched compared with that in traditional cutting.

Ultrasonic Cutting with High-Gain Blades

2004 ◽  
Vol 1-2 ◽  
pp. 45-50
Author(s):  
Alan MacBeath ◽  
Andrea Cardoni ◽  
Lorna Smith ◽  
Margaret Lucas
Keyword(s):  
Longitudinal Mode ◽  
Compact Tension ◽  
High Gain ◽  
Long Bone ◽  
Ultrasonic Frequency ◽  
Cutting Mechanism ◽  
Gain Profile ◽  
The Relationship ◽  
Cutting Experiments ◽  
Ultrasonic Cutting

The design of high power ultrasonic cutting devices is based on tuning a blade to a longitudinal mode of vibration at a low ultrasonic frequency, usually in the range 20-100 kHz. To achieve the required cutting amplitude, gain is designed into the blade via profiling. It is expected that the use of higher-gain blades could enable longitudinal-mode guillotine-type cutting of a range of materials traditionally difficult to cut using this technology. Using a conventional high-gain blade, a feasibility study of ultrasonic cutting of bone is conducted using compact tension specimens of bovine femur. Finite element (FE) models are created, based on the assumption that the ultrasonic blade causes a crack to propagate in a controlled mode 1 opening. The models are compared with the experimental data collected from ultrasonic bone cutting experiments. Although the proposed cutting mechanism is supported by the data, the blade gain is insufficient to enable through cutting of long bone or other difficult to cut materials. Consequently, the paper examines the relationship between gain, profile, stress and nodal position for a range of ultrasonic cutting blades with increased gain.

scholarly journals Simulation of electron density maps for two-dimensional crystal structures usingMathematica

2001 ◽  
Vol 34 (5) ◽  
pp. 658-660 ◽  
Author(s):  
Plinio Delatorre ◽  
Walter Filgueira de Azevedo Jr
Keyword(s):  
Crystal Structures ◽  
Electron Density ◽  
Two Dimensional ◽  
Thermal Displacement ◽  
Density Maps ◽  
Cell Dimensions ◽  
Unit Cell Dimensions ◽  
The Relationship ◽  
Dimensional Crystal

The simulations presented here are based on the programMathematicaas a tool to present electron density maps of two-dimensional crystal structures. The models give further insights into the relationship between the thermal displacement parameters and the quality of the electron density maps. Furthermore, users can readily test the effects of several crystallographic parameters on the electron density maps, such as, the number of reflections, the thermal displacement parameters and the unit-cell dimensions.

scholarly journals Reflections on Working with Defenses and Resistances in the Context of Teletherapy

2021 ◽  
Vol 31 (1) ◽  
pp. 23-37
Author(s):  
Louise Fréchette
Keyword(s):  
Research Data ◽  
The Body ◽  
Two Dimensional ◽  
Visual Fatigue ◽  
Dimensional Representation ◽  
Face To Face ◽  
The Relationship

This article focuses on the challenges we face as bioenergetic therapists when doing teletherapy. It addresses the difficulty of working with defenses and resistances in a context where the client is not physically present and where we only see part of the body through a screen, in a two-dimensional representation (sessions on video) or not at all (phone sessions). It offers practical suggestions to compensate for what cannot be apprehended directly due to distant communication. It also offers some research data on the level of efficacy and on the quality of the relationship, when teletherapy is compared with face-to-face therapy. Finally, it offers practical suggestions with regards to visual fatigue and as well as some elements of understanding Zoom fatigue.

The Relationship Between Interoception and Metacognition

2016 ◽  
Vol 30 (2) ◽  
pp. 76-86 ◽  
Author(s):  
Judith Meessen ◽  
Verena Mainz ◽  
Siegfried Gauggel ◽  
Eftychia Volz-Sidiropoulou ◽  
Stefan Sütterlin ◽  
...  
Keyword(s):  
Memory Performance ◽  
Memory Task ◽  
Demographic Characteristics ◽  
Metacognitive Awareness ◽  
Interoceptive Awareness ◽  
Future Research ◽  
Heartbeat Perception ◽  
Interoceptive Accuracy ◽  
The Relationship

Abstract. Recently, Garfinkel and Critchley (2013) proposed to distinguish between three facets of interoception: interoceptive sensibility, interoceptive accuracy, and interoceptive awareness. This pilot study investigated how these facets interrelate to each other and whether interoceptive awareness is related to the metacognitive awareness of memory performance. A sample of 24 healthy students completed a heartbeat perception task (HPT) and a memory task. Judgments of confidence were requested for each task. Participants filled in questionnaires assessing interoceptive sensibility, depression, anxiety, and socio-demographic characteristics. The three facets of interoception were found to be uncorrelated and interoceptive awareness was not related to metacognitive awareness of memory performance. Whereas memory performance was significantly related to metamemory awareness, interoceptive accuracy (HPT) and interoceptive awareness were not correlated. Results suggest that future research on interoception should assess all facets of interoception in order to capture the multifaceted quality of the construct.

The relationship between optimism, personal control and quality of life of patients with COPD

2002 ◽  
Author(s):  
R. Arnold ◽  
A. V. Ranchor ◽  
N. H. T. ten Hacken ◽  
G. H. Koeter ◽  
V. Otten ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Personal Control ◽  
The Relationship

Using the alveograph in developing requirements for the quality of flour for wafer sheet production

2020 ◽  
Vol 29 (12) ◽  
pp. 52-58
Author(s):  
E.P. Meleshkina ◽  
◽  
S.N. Kolomiets ◽  
A.S. Cheskidova ◽  
◽  
...  
Keyword(s):  
Rheological Properties ◽  
Quality Indicators ◽  
Wheat Flour ◽  
Mathematical Statistics ◽  
Intended Purpose ◽  
The Future ◽  
Relationship Of ◽  
The Relationship

Objectively and reliably determined indicators of rheological properties of the dough were identified using the alveograph device to create a system of classifications of wheat and flour from it for the intended purpose in the future. The analysis of the relationship of standardized quality indicators, as well as newly developed indicators for identifying them, differentiating the quality of wheat flour for the intended purpose, i.e. for finished products. To do this, we use mathematical statistics methods.

HUBUNGAN KUALITAS KEHIDUPAN KERJA TERHADAP KINERJA PERAWAT PELAKSANA

2019 ◽  
Vol 9 (4) ◽  
pp. 413-420
Author(s):  
Amella Gusty ◽  
Dachriyanus Dachriyanus ◽  
Leni Merdawati
Keyword(s):  
District Hospital ◽  
Simple Random Sampling ◽  
Work Life ◽  
Quality Of Work Life ◽  
P Value ◽  
Work Context ◽  
Cross Sectional ◽  
Quality Of Work ◽  
The Relationship

Kinerja perawat merupakan hasil yang dicapai dalam melaksanakan asuhan keperawatan di rumah sakit. Terciptanya asuhan keperawatan yang optimal sangat diperlukan dukungan dari pihak rumah sakit salah satunya adalah menciptakan kualitas kehidupan kerja baik bagi perawat. Penelitian ini bertujuan untuk mengetahui hubungan antara kualitas kehidupan kerja terhadap kinerja perawat pelaksana di RSUD Teluk Kuantan. Jenis penelitian kuantitatif dengan pendekatan cross sectional. Jumlah sampel 120 responden yang diperoleh melalui proportionate simple random sampling. Hasil penelitian menunjukkan kualitas kehidupan kerja perawat RSUD Teluk Kuantan berada pada kategori sedang, kinerja perawat berada pada kategori kurang baik. Berdasarkan analisis kedua variabel teridentifikasi bahwa tidak ada hubungan antara kualitas kehidupan kerja dengan kinerja perawat pelaksana dengan  p value 0,817. Dimensi work context merupakan komponen yang memiliki hubungan dengan kinerja perawat pelaksana dengan p value 0,008, dimensi work life  tidak berhubungan secara signifikan dengan kinerja perawat. Kesimpulan penelitian diketahui tidak ada hubungan antara kualitas kehidupan kerja dengan kinerja perawat pelaksana. Ada hubungan dimensi work context dengan kinerja perawat pelaksana. Tidak ada hubungan dimensi work life dengan kinerja perawat.   Kata kunci: kualitas kehidupan kerja, kinerja, perawat pelaksana   THE RELATIONSHIP BETWEEN THE QUALITY OF WORK LIFE AND THE PERFORMANCE OF IMPLEMENTERS NURSES   ABSTRACT Nurse performance is the result achieved in implementing nursing care in a hospital. The creation of optimal nursing care is very much needed support from the hospital, one of which is to create a good quality of work life for nurses. This study aims to determine the relationship between the quality of work life and the performance of nurses at the Kuantan District Hospital. This type of quantitative research with cross sectional approach. The number of samples of 120 respondents obtained through proportionate simple random sampling. The results showed that the quality of work life of nurses at the Kuantan District Hospital was in the medium category, the nurses' performance was in the unfavorable category. Based on the analysis of the two variables, it was identified that there was no relationship between the quality of work life with the performance of implementing nurses with a p value of 0.817. The work context dimension is a component that has a relationship with the performance of nurses implementing with p value 0.008, the dimension of work life does not significantly correlate with nurse performance. The conclusion of the research is that there is no relationship between the quality of work life and the performance of the implementing nurses. There is a relationship between the dimensions of the work context and the performance of the nurses. There is no relationship between the dimensions of work life and nurse performance.   Keywords: quality of work life, performance, implementers nurse

Management of Economics and State "Bottom"

2020 ◽  
Vol 17 (6) ◽  
pp. 76-91
Author(s):  
E. D. Solozhentsev
Keyword(s):  
Quality Of Life ◽  
Artificial Intelligence ◽  
Probabilistic Models ◽  
Human Life ◽  
Special Software ◽  
Human Quality ◽  
Relationship Of ◽  
The Relationship

The scientific problem of economics “Managing the quality of human life” is formulated on the basis of artificial intelligence, algebra of logic and logical-probabilistic calculus. Managing the quality of human life is represented by managing the processes of his treatment, training and decision making. Events in these processes and the corresponding logical variables relate to the behavior of a person, other persons and infrastructure. The processes of the quality of human life are modeled, analyzed and managed with the participation of the person himself. Scenarios and structural, logical and probabilistic models of managing the quality of human life are given. Special software for quality management is described. The relationship of human quality of life and the digital economy is examined. We consider the role of public opinion in the management of the “bottom” based on the synthesis of many studies on the management of the economics and the state. The bottom management is also feedback from the top management.

Sign in / Sign up

Export Citation Format

Share Document