Investigation on Tool Wear about High Efficient Axial Turning-Grinding of Engineering Ceramics

2012 ◽  
Vol 426 ◽  
pp. 89-92 ◽  
Author(s):  
X.L. Tian ◽  
Fang Guo ◽  
Ya Tao Mao ◽  
B.G. Zhang ◽  
Jian Quan Wang ◽  
...  
Keyword(s):  
Tool Wear ◽  
High Speed ◽  
High Efficiency ◽  
Low Cost ◽  
Cutting Edge ◽  
Engineering Ceramics ◽  
High Efficient ◽  
High Speed Rotation ◽  
Cylindrical Workpiece ◽  
A Minor

Axial turning-grinding is a processing method to cut cylindrical workpiece or inner surface of hole along its axis, using the kinetic energy of high-speed rotation annularity tool, the abrasives in tool tip as the main cutting edge to remove materials and the abrasives in the outside surface of tool as a minor cutting edge to sharpen the processed surface. And the cutting thickness and feed rate could be more than 5~10mm and 200mm/min respectively in a cutting, realizing high-efficiency, low-cost processing of engineering ceramics. Using the method, the ceramic sleeve of delivery valve precision coupling components in the engine is processed with high efficiency, and tool wear was researched with single factor test. The result indicated that the ratio of spindle speed and workpiece speed should be within a certain range in order to minimize tool wear, and tool wear increases with the increase of cutting depth, but not a linear relation.

Study on Axial Turning of Engineering Ceramics

2010 ◽  
Vol 135 ◽  
pp. 309-313 ◽  
Author(s):  
Xin Li Tian ◽  
Fang Guo ◽  
Jun Fei Yang ◽  
Bao Guo Zhang ◽  
Ya Tao Mao
Keyword(s):  
High Speed ◽  
Low Cost ◽  
Cutting Edge ◽  
Work Piece ◽  
Transverse Cracks ◽  
Engineering Ceramics ◽  
High Efficient ◽  
High Speed Rotation ◽  
Speed Rotation ◽  
A Minor

Axial turning is a method to cut the cylindrical work piece along its axis, using the kinetic energy of high-speed rotation annularity tool, the abrasives in tool tip (or toes) as the main cutting edge to remove materials and the abrasives in the inner surface of tool as a minor cutting edge to sharpen the processed surface. The cutting thickness and feed rate could be more than 3~5mm and 30mm/min respectively in a cutting, and realized high-efficient, low-cost processing of engineering ceramics. Processing mechanism analyses showed that both median/radial cracks and lateral cracks occurred in the part to be removed, and the intensity of the processed part had little destroyed, only needing adjust the axial force to control the length of transverse cracks.

Investigation on Axial Turning-Grinding of Engineering Ceramics

2010 ◽  
Vol 154-155 ◽  
pp. 1027-1032 ◽  
Author(s):  
Xin Li Tian ◽  
Fang Guo ◽  
Ya Tao Mao ◽  
Jian Quan Wang ◽  
Sen Xu ◽  
...  
Keyword(s):  
Axial Force ◽  
Feed Rate ◽  
High Speed ◽  
High Efficiency ◽  
Low Cost ◽  
Cutting Edge ◽  
Transverse Cracks ◽  
Engineering Ceramics ◽  
Damage Degree ◽  
Cylindrical Workpiece

Axial turning-grinding is a processing method to cut the cylindrical workpiece along its axis, using the kinetic energy of high-speed rotation annularity tool, the abrasives in tool tip as the main cutting edge to remove materials and the abrasives in the outside surface of tool as a minor cutting edge to sharpen the processed surface. Comparing with concentric axial turning-grinding, eccentric axial turning-grinding has higher efficiency. The result indicated that cutting thickness and feed rate could be more than 5~10mm and 200mm/min respectively in a cutting, realizing high-efficiency, low-cost processing of engineering ceramics. According to axial force, chips’ shape and damage degree of surface to be processed, obtaining the proper feed rate range. Removal mechanism analyses showed that both median/radial cracks and lateral cracks occurred in the part to be removed, and the intensity of the processed part had little destroyed, only needing adjust axial force to control the length of transverse cracks.

Mechanism Analysis of High Efficiency Axial Turn-Grinding of Engineering Ceramics

2011 ◽  
Vol 487 ◽  
pp. 376-380 ◽  
Author(s):  
Xin Li Tian ◽  
Fang Guo ◽  
Ya Tao Mao ◽  
Bao Guo Zhang ◽  
Jian Quan Wang ◽  
...  
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Cutting Edge ◽  
Work Piece ◽  
Mechanism Analysis ◽  
Machined Surface ◽  
Effective Removal ◽  
High Speed Rotation ◽  
Speed Rotation ◽  
A Minor

Axial turn-grinding is a method to cut the cylindrical work piece along its axis, using the kinetic energy of high-speed rotation annularity tool, the abrasives in tool tip as the main cutting edge to remove materials and the abrasives in the inside or outside surface of tool as a minor cutting edge to sharpen the processed surface. Through analysis the simplified model, a slightly stress concentration was found at the junction surface of processed surface and machined surface, which had little damage to the workpiece because of happening in the part to be removed or precision machining allowance, and both cracks propagation caused by material rupture were effective removal after material removal mechanism analysis because the extension of the median/radial crack and lateral crack were both happening in the part to be removed.

A Study on Driven-Type Rotary Cutting for Finish Turning of Carburized Hardened Steel

2012 ◽  
Vol 523-524 ◽  
pp. 250-255 ◽  
Author(s):  
Hideharu Kato ◽  
Tatsuya Shikimura ◽  
Yoshitaka Morimoto ◽  
Kazuhiro Shintani ◽  
Toshio Inoue ◽  
...  
Keyword(s):  
Tool Wear ◽  
Feed Rate ◽  
High Speed ◽  
High Efficiency ◽  
Single Point ◽  
Hardened Steel ◽  
Cutting Edge ◽  
Finish Turning ◽  
Cutting Length ◽  
Rotary Cutting

Recently, cutting has replaced grinding in the finish processing of hardened steel. However, tool damage is a major problem in high-efficiency operations that use high-speed cutting and high feed rate conditions instead of the present cutting conditions. Therefore, the examination of a new cutting technique that can realize high-efficiency cutting is desired. In this study, the effects and efficiency of driven rotary cutting are investigated in the finish turning of carburized hardened steel. Based on the results, flaking occurs at the cutting edge at a short cutting length of 0.2 km using single-point turning. On the other hand, even if the cutting length amounts to 1.5 km, the tool wear width without flaking is small in the case of a driven rotary tool. Additionally, the tool wear is uniformly distributed along the circumference of the cutting edge. Furthermore, based on an examination of high-efficiency processing by increasing the feed rate, it is clarified that a feed rate of 0.3 mm/rev is the optimum condition from the viewpoint of wear resistance and surface roughness. Additionally, even if the cutting length amounts to 5.0 km for this condition, the flank wear width is as small as 0.04 mm, and the tool wear progresses gradually.

scholarly journals Study on High-Efficiency Finish Turning of Carburized Hardened Steel with Driven Rotary Cutting

2013 ◽  
Vol 7 (3) ◽  
pp. 321-328 ◽  
Author(s):  
Hideharu Kato ◽  
◽  
Tatsuya Shikimura ◽  
Yoshitaka Morimoto ◽  
Kazuhiro Shintani ◽  
...  
Keyword(s):  
Tool Wear ◽  
Feed Rate ◽  
High Speed ◽  
High Efficiency ◽  
Single Point ◽  
Hardened Steel ◽  
Cutting Edge ◽  
Finish Turning ◽  
Cutting Length ◽  
Rotary Cutting

Recently, cutting has replaced grinding in the finish processing of hardened steel. However, tool damage is a major problem in high-efficiency operations that use high-speed cutting and high-feed rate conditions instead of the present cutting conditions. Therefore, the examination of a new cutting technique that can realize high-efficiency cutting is desired. In this study, the effects and efficiency of driven rotary cutting are investigated in the finish turning of carburized hardened steel. Based on the results, flaking occurs when single-point turning is used at the cutting edge at a short cutting length of 0.2 km. On the other hand, even if the cutting length amounts to 5.0 km, the tool wear width without flaking is small in the case of driven rotary cutting. Additionally, the tool wear is uniformly distributed along the circumference of the cutting edge. Furthermore, based on an examination of high-efficiency processing by increasing the feed rate, it is found that a feed rate of 0.3 mm/rev is the optimum condition from the viewpoint of wear resistance and surface roughness. Additionally, even if the cutting length amounts to 5.0 km for this condition, the flank wear is as narrow as 0.04 mm, and the tool wear progresses gradually.

SIMULATION SCHEME MODELING OF THE SUPER-SPEED TIME BUFFER

2020 ◽  
Author(s):  
А.М. САЖНЕВ ◽  
Л.Г. РОГУЛИНА
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Low Cost ◽  
Circuit Modeling ◽  
Clock Signal ◽  
Behavioral Models ◽  
Software Environment ◽  
Time Buffer ◽  
The Given ◽  
Simulation Scheme

Приводятся результаты моделирования сверхскоростного буфера тактовых сигналов, выполненного на базе арсенид-галлиевых n-канальных транзисторов в среде OrCAD и полностью отвечающего следующим требованиям: высокие технические характеристики, малые размеры, высокая частота и КПД, гибкость применения. Приведенные поведенческие модели допускают использование любой программной среды по схемотехническому моделированию. The results of simulation of an ultra-high-speed clock signal buffer based on gallium arsenide n-channel transistors in OrCAD are presented, which fully meets the following requirements: high technical characteristics, application flexibility, low cost, small size, high frequency, and high efficiency. The given behavioral models allow the use of any software environment for circuit modeling.

Fingerprint Identification System Based on DSP

2012 ◽  
Vol 468-471 ◽  
pp. 920-923
Author(s):  
Ya Ping Bao ◽  
Li Liu ◽  
Yuan Wang ◽  
Qian Song
Keyword(s):  
Software Design ◽  
High Speed ◽  
High Efficiency ◽  
Low Cost ◽  
Fingerprint Identification ◽  
Identification System ◽  
System Operation ◽  
Operation Speed ◽  
High Speed Data Acquisition ◽  
High Speed Data

This paper introduced a fast fingerprint identification system based on TMS320VC5416 DSP chip and MBF200 solidity fingerprint sensor. It precipitates fingerprint identification device developing into the direction of miniaturization, embedded and automatic.It recommends fingerprint identification system hardware and software design and the main system processing flow, aim at fingerprint identification arithmetic, the influence of system operation speed is being researched at the same time. High-speed data acquisition system is been built in order to achieve a DSP fingerprint identification system with high efficiency and low cost.

The Gear Bearing Drive: A Novel Compact Actuator for Robotic Joints

2013 ◽  
Author(s):  
Elias Brassitos ◽  
Constantinos Mavroidis ◽  
Brian Weinberg
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Low Cost ◽  
Planetary Gear ◽  
Mechanical Efficiency ◽  
Torsional Stiffness ◽  
Maximum Output ◽  
Torque Density ◽  
Robotic Joints ◽  
Advanced Robotics

Advanced robotics requires a new generation of actuators able to exhibit a number of desirable characteristics ranging from high power density and high efficiency, high positioning resolution, high torque capacity and torsional stiffness, lightweight designs and low-cost packages. In this paper, we present the development and the experimental evaluation of a new actuator, aimed at improving the torque density and mechanical efficiency of actuated robotic joints, and enhancing the portability and effectiveness of robotic systems engaged in biomechanical applications such as rehabilitation robots and wearable exoskeletons. The new actuator, called the Gear Bearing Drive (GBD), consists of a two-stage planetary gear arrangement coupled through the planets and driven by an external rotor brushless motor that is inscribed within the input stage sun gear. This planetary configuration enables for incredible high-speed reductions and allows for embedding the motor directly within the gearbox saving significant space on the actuator length. Our initial experimental prototypes have demonstrated impressive performance with the potential to deliver more than 30Nm of continuous torque with 85% mechanical efficiency and 0.0005 degree of backlash, and up to 200 rpm maximum output speed in a highly compact and robust package.

Machining Mechanism of Abrasive Water Jet on Ceramics

2010 ◽  
Vol 426-427 ◽  
pp. 212-215 ◽  
Author(s):  
Feng Lian Zhang
Keyword(s):  
High Efficiency ◽  
Low Cost ◽  
Brittle Materials ◽  
High Hardness ◽  
Ceramic Materials ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Engineering Ceramics ◽  
Abrasive Water Jet Machining ◽  
Complex Process

Engineering ceramics feature resistance to high temperature, corrosion, wear and hot impact. However, it is difficult to machine this material in conventional machining methods because of its high hardness and brittleness as well as inconductivity, thus restricting its application area. In recent years, more and more importance has been attached to the new machining method of engineering ceramics, i.e. abrasive water-jet. Feature high efficiency and low cost, the method can be used to process the products of complex shape. However, abrasive water-jet machining of advanced ceramics is a very complex process. The effect of machining on brittle materials, and advanced ceramic materials in particular, have not yet been very well understood. The present research investigates the effect of abrasive water-jet machining on ceramics. The study will increase the general understanding of the machining phenomena for more successful application of abrasive water-jet machining on brittle materials.

High-Speed Finishing of Hard Gear Teeth with cBN-Tipped Hob

2008 ◽  
Vol 2 (5) ◽  
pp. 348-353 ◽  
Author(s):  
Yoji Umezaki ◽  
◽  
Yasutsune Ariura ◽  
Toshio Suzuki ◽  
Ryohei Ishimaru ◽  
...  
Keyword(s):  
Surface Properties ◽  
High Speed ◽  
High Efficiency ◽  
Cubic Boron Nitride ◽  
Cutting Temperature ◽  
Cutting Edge ◽  
Wear Properties ◽  
High Speed Cutting ◽  
Gear Teeth ◽  
Finished Surface

The hobbing finish of hard gear teeth such as case-hardened gears is anticipated for practical use in high efficiency production. We studied wear and finished surface properties in cutting tests using a cubic boron nitride (cBN) hob cutter in high-speed cutting at 900 m/min of case-hardened steel. The cBN content in tip ingredients is related to wear, and tips high in cBN content are superior in wear resistance. The high thermal conductivity of cBN tips helps transfer cutting temperature heat to chips, melting and adhering them to the relief surface. Flaking may occur on the cutting edge but new chipping does not occur although chipping may exist after grinding. Finished surface roughness is influenced by horning on the cutting edge. Round horning leads to a smooth surface. High-speed finishing with cBN-tipped hobs is analyzed in view of cBN tip grinding and finished surface properties, in addition to wear properties.

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