scholarly journals Script-aided generation of Mental Cutting Test exercises using Blender

2021 ◽  
Vol Accepted manuscript ◽  
Author(s):  
Róbert Tóth
Keyword(s):  
Cutting Test

scholarly journals Using uniform design and regression methodology of turning parameters study of nickel alloy

2021 ◽  
Author(s):  
Shao-Hsien Chen ◽  
Chih-Hung Hsu
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Nickel Alloy ◽  
Design Methodology ◽  
Cutting Tool ◽  
Uniform Design ◽  
Machining Time ◽  
Variable Parameters ◽  
Cutting Test ◽  
Set Up

AbstractThe nickel alloy has good mechanical strength and corrosion resistance at high temperature; it is extensively used in aerospace and biomedical and energy industries, as well as alloy designs of different chemical compositions to achieve different mechanical properties. However, for high mechanical strength, low thermal conductivity, and surface hardening property, the nickel alloy has worse cutting tool life and machining efficiency than general materials. Therefore, how to select the optimum machining parameters will influence the workpiece quality, cost, and machining time. This research will be using a new experimental design methodology to the cutting parameter planning for nickel-based alloy cutting test, and used the uniform design methodology to cutting test to reduce the number of experiments. Three independent variable parameters are set up, including cutting speed, feed rate, and cutting depth, and four dependent variable parameters are set up, including cutting tool wear, surface roughness, machining time, and cutting force. A nickel alloy turning parameter model is built by using regression analysis to further predict the I/O relationship among various combinations of variables. The errors between actual values and prediction values are validated. When the cutting tool wear (VB) is 2.72~6.18%, the surface roughness (Ra) is 4.10~7.72%, the machining time (T) is 3.75~8.82%, and the cutting force (N) is 1.54~7.42%; the errors of various dependent variables are approximately less than 10%, so a high precision estimation model is obtained through a few experiments of uniform design method.

scholarly journals The Technology Research on Cutting Test of 4GXJ-I Tapping Knife for Rubber Tree

2019 ◽  
Vol 592 ◽  
pp. 012070
Author(s):  
Chang Huang ◽  
Lingling Wang ◽  
Jianhua Cao ◽  
Yong Zheng ◽  
Sihao Wu
Keyword(s):  
Rubber Tree ◽  
Technology Research ◽  
Cutting Test

scholarly journals Preparation and cutting performance of nano-scaled Al2O3-coated micro-textured cutting tool prepared by atomic layer deposition

2021 ◽  
Vol 40 (1) ◽  
pp. 77-86
Author(s):  
Siwen Tang ◽  
Pengfei Liu ◽  
Zhen Su ◽  
Yu Lei ◽  
Qian Liu ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Atomic Layer Deposition ◽  
Cutting Force ◽  
Cutting Tool ◽  
Orthogonal Cutting ◽  
Cutting Tools ◽  
Atomic Layer ◽  
Cutting Performance ◽  
Cutting Test ◽  
Layer Deposition

Abstract Al2O3 nano-scaled coating was prepared on micro-textured YT5 cemented carbide cutting tools by atomic layer deposition ALD. The effect of Al2O3 nano-scaled coating, with and without combined action of texture, on the cutting performance was studied by orthogonal cutting test. The results were compared with micro-textured cutting tool and YT5 cutting tool. They show that the micro-texture and nano-scaled Al2O3 coated on the micro-texture both can reduce the cutting force and friction coefficient of the tool, and the tools with nano-scaled Al2O3 coated on the micro-texture are more efficient. Furthermore, the friction coefficient of the 100 nm Al2O3-coated micro-texture tool is relatively low. When the distance of the micro-pits is 0.15 mm, the friction coefficient is lowest among the four kinds of pit textured nanometer coating tools. The friction coefficient is the lowest when the direction of the groove in strip textured nanometer coating tool is perpendicular to the main cutting edge. The main mechanism of the nanometer Al2O3 on the micro-textured tool to reduction in cutting force and the friction coefficient is discussed. These results show that the developed tools effectively decrease the cutting force and friction coefficient of tool–chip interface.

A Universal Postprocessor of General Table-Tilting Type of Five-Axis Machine Tools Without Rotational Tool Center Point Function for Actual NC Code Generation

2018 ◽  
Author(s):  
Guoqiang Fu ◽  
Hongli Gao ◽  
Tengda Gu
Keyword(s):  
Code Generation ◽  
Machine Tools ◽  
Kinematic Chain ◽  
Rotary Axes ◽  
Nc Code ◽  
Rotation Axes ◽  
Cutting Test ◽  
Center Point ◽  
Rtcp Function ◽  
Five Axis

The postprocessor is essential for machining with five-axis machine tools. This paper develops one universal postprocessor for table-tilting type of five-axis machine tools without rotational tool center point (RTCP) function. Firstly, positions of two rotary axes and the workpiece in the machine coordinate system (MCS) are introduced into the kinematic chain of the five-axis machine tools. The uniform product of exponential (POE) formula of the tool relative to the workpiece is established to obtain the universal forward kinematics. On this basis, the postprocessor of table-tilting type of five-axis machine tools is developed. The calculation of rotation angles of rotation axes is proposed in details, including the calculation of double solutions, the determination of rotation angles of C-axis and the selection principle of the shortest path of rotation angles. Movements of linear axes are calculated with rotation angles of rotary axes. The generated movements of all axes are actual positions of all axes relative to their zero positions, which can be used for machining directly. The postprocessor does not rely on RTCP function with positions of rotary axes and the workpiece in MCS. Finally, cutting test in VERICUT and real cutting experiments on SmartCNC500_DRTD five-axis machine tool are carried out to verify the effectiveness of the proposed postprocessor.

Use of Audio Signals for Chatter Detection and Control

1992 ◽  
Vol 114 (2) ◽  
pp. 146-157 ◽  
Author(s):  
T. Delio ◽  
J. Tlusty ◽  
S. Smith
Keyword(s):  
Frequency Domain ◽  
End Milling ◽  
Practical Implementation ◽  
Chatter Detection ◽  
Short Contact Time ◽  
Cutting Test ◽  
Displacement Sensors ◽  
Chatter Control ◽  
And Control ◽  
Low Radial Immersion

This paper compares various sensors and shows that a microphone is an excellent sensor to be used for chatter detection and control. Comparisons are made between the microphone and some other common sensors (dynamometers, displacement probes, and accelerometers) regarding sensing of unstable milling. It is shown that the signal from the microphone provides a competitive, and in many instances a superior, signal tht can be utilized to identify chatter. Using time domain milling simulations of low-radial-immersion, low-feed, finishing operations it is shown that for these cuts (especially at relatively high speeds) chatter is not adequately reflected in the force signal because of the short contact time, but that it is clearly seen in the displacement signal. Using the dynamics of existing production milling machines it is shown how the microphone is more suitable to chatter detection than other remotely placed displacement sensors, especially in cases that involve flexible tooling and workpieces. Aspects important for practical implementation of a microphone in an industrial setting are discussed. Limitations of the microphone are addressed, such as directional considerations, frequency response, and environmental sensitivity (i.e., workspace enclosure, room size, etc). To compensate for expected unwanted noises, commonly known directionalization techniques such as isolation, collection, and intensity methods are suggested to improve the ability of the microphone to identify chatter by reducing or eliminating background and extraneous noises. Using frequency domain processing and the deterministic frequency domain chatter theory, a microphone is shown to provide a proper and consistent signal for reliable chatter detection and control. Cutting test records for an operating, chatter recognition and control system, using a microphone, are presented; and numerous examples of chatter control are listed which include full and partial immersion, face-and end-milling cuts.

Study on Dynamic Accuracy of CNC in Aviation Part

2011 ◽  
Vol 314-316 ◽  
pp. 1717-1720
Author(s):  
Li Du ◽  
Wei Wang ◽  
Zhi Yong Song ◽  
Jie Xiong Ding
Keyword(s):  
High Speed ◽  
Influence Factors ◽  
Maximum Error ◽  
Error Sources ◽  
Dynamic Accuracy ◽  
Cutting Test ◽  
Manufacture Process ◽  
Shape Precision ◽  
Dynamic Errors ◽  
And Control

Thin-walled parts are widely used in aerospace engineering. For their complexity under loading and the higher shape precision, it’s difficult for their manufacturing on high speed machine. In order to understand manufacture process, characteristic of aviation part in high speed machining is investigated. Error sources on parts are classified and the maximum error, dynamic errors are studied on its main influence factors, such as cutting force and vibration. Finally, useful method on cutting test part is proposed, which can observe and control dynamic accuracy of aviation part and ensure effective manufacture.

scholarly journals Fermentación de la almendra de copoazú (Theobroma grandiflorum [Willd. ex Spreng.] Schum.): evaluación y optimización del proceso

2010 ◽  
Vol 11 (2) ◽  
pp. 107 ◽  
Author(s):  
Jenifer Criollo ◽  
Dagoberto Criollo ◽  
Angélica Sandoval Aldana
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Process Optimization ◽  
Fermentation Process ◽  
Raw Material ◽  
Sensory Panel ◽  
Yeast Saccharomyces Cerevisiae ◽  
Theobroma Grandiflorum ◽  
Cutting Test ◽  
Maximum Range ◽  
Low Levels

<p>La almendra de copoazú como producto promisorio para la industria de cosméticos, chocolate, bebidas, licores y conservas, se evaluó el proceso de fermentación variando el tiempo de remoción de la masa (24 y 48 horas) y la pulpa inicial (30 y 100%). Se tuvieron en cuenta las condiciones de los productores en el acceso a equipos de despulpado. Se cuantificó la temperatura de la masa en tres puntos (superior, medio e inferior), acidez, pH, humedad, prueba de corte y análisis sensorial. Se encontró bajo desarrollo de la temperatura de fermentación en los tratamientos con 100% de pulpa y se registraron las máximas temperaturas entre 35 y 36°C que indican deficiencias en el proceso; no se alcanzó los 40°C requeridos para la muerte del embrión. El 30% de pulpa inicial y la remoción cada 24 horas por 9 días, fueron las mejores condiciones encontradas. La optimización con 0,1% de levadura (Saccharomyces cerevisiae) aumentó la temperatura de fermentación hasta 44°C, los granos fermentados hasta 56,14% y el mayor desarrollo de sabores frutales con intensidad de 4, mostrando un mejor proceso de fermentación. El panel sensorial mostró que los licores de copoazú tienen notas frutales destacadas y bajos valores de otros sabores evaluados. Los resultados son semejantes a los cacaos criollos, conocidos en el mundo como materia prima de licores finos y de aroma.</p><p> </p><p><strong>Fermentation of the copoazu kernel (Theobroma grandiflorum [Willd. ex Spreng.] Schum.): Assessmente and process optimization</strong></p><p>The fermentation of copoazu kernels (a promising product for the cosmetics industry, chocolate, beverages, liquors and preserves) was evaluated varying the time of mass removal (24 and 48 hours) and the initial pulp (30 and 100%). This study took into account the degree of access the producers had to pulping equipment. We quantified temperature of the mass at three points (top, middle and bottom), acidity, pH, moisture, cutting test and sensory analysis. The observed temperatures during fermentation in the treatments with 100% pulp reached a maximum range between 35 and 36°C which indicated deficiencies in the process as the 40°C required for the death of the seed was not attained. Thirty percent initial pulp with removal every 24 hours for 9 days yielded the best results. Optimization with 0.1% yeast (Saccharomyces cerevisiae) increased the fermentation temperature to 44°C, augmented fermented beans to 56.14% and saw a development of fruit flavors with an intensity of 4, demonstrating a better fermentation process. The sensory panel showed that copoazu liquors have outstanding fruity notes and low levels of other evaluated flavors. The results are similar to the criollo cacao, known worldwide as a raw material for fine liquors and fragrances.</p>

Research on Water Cut of Silicon Steel Plate

2012 ◽  
Vol 503-504 ◽  
pp. 367-369
Author(s):  
Geng Wu Liu
Keyword(s):  
Steel Plate ◽  
Water Pressure ◽  
Cutting Speed ◽  
Silicon Steel ◽  
Cutting Test ◽  
Water Cutting ◽  
Water Cut ◽  
Magnetic Conductivity ◽  
Main Material

Silicon steel plate is main material of motor and transformer , and was always used die for its production . Through water cutting test , the cutting speed of beeline and arc and water pressure was adjusted , the water cutting technology was mastered . The quality of production such as dimension , burr height was controlled well . The cut area was not rust because of using dry technology and the magnetic conductivity was not affected using water cutting . It will provides a speediness way for silicon steel plate production .

Machining Vibration Suppression of a Cylindrical Part by a Point-Contact Support

2020 ◽  
Author(s):  
Atsushi Matsubara ◽  
Kotaro Mori ◽  
Daisuke Kono
Keyword(s):  
Frequency Response ◽  
Vibration Suppression ◽  
Point Contact ◽  
Aircraft Engine ◽  
Cylindrical Part ◽  
Curved Surface ◽  
Cutting Test ◽  
Support Element ◽  
Simple Support ◽  
Multiple Support

Abstract Aircraft engine cases employ a thin-walled cylindrical structure for the reduction of fuel consumption. The machining of such parts requires support systems as cutting forces generate shell mode vibrations. There has been much research on the design of vibration suppression devices such as mass dampers, tuned mass dampers, active dampers, and fixturing stretch. Although such devices can offer excellent performance in vibration suppression, cost, and time for manufacturing and setup with tuning are problems. In this paper, the test results of a simple support system that suppresses the vibration modes of a cylindrical part are reported. A support element employs two-contacts in the curved surface. Multiple support elements are arranged according to the number of antinodes of shell modes. Each support has two rollers with a rotating head; the roller contact aligned in the curved surface. For the decision of the number of the support elements, modal analysis was carried out for a cylindrical part. An excitation test was carried out to evaluate the frequency response of a supported cylinder, and several peaks in frequency response were found to be suppressed. A cutting test with an endmill was carried out to evaluate the vibration levels. The experimental results show that the support can suppress forced vibration during machining.

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