Novel Contact Sensor for High-Speed Machining

2012 ◽  
Vol 134 (6) ◽  
Author(s):  
Valéry Bourny ◽  
Florent Swingedouw ◽  
Thierry Capitaine ◽  
Aurélien Lorthois ◽  
Jérôme Dubois ◽  
...  
Keyword(s):  
Embedded System ◽  
High Speed ◽  
Ease Of Use ◽  
High Speed Machining ◽  
Workpiece Surface ◽  
Finishing Process ◽  
Contact Sensor ◽  
Magnitude Variation ◽  
Machining Operations ◽  
First Contact

This work presents a method implemented in an embedded system to detect the first contact between a high-speed machine tool and a workpiece surface with high accuracy, reliability and ease-of-use. This method is based on impedance magnitude variation measurements and the computation of a correlation function. A specific sensor was designed from this method for testing purposes in actual industrial conditions. This work is focused on the detection of the first contact between the tool and the workpiece surface. The purpose of this paper is to explore the efficiency of impedance spectroscopy and to identify a method to detect the first contact between a tool and a workpiece efficiently in high-speed machining operations and for the finishing process in particular.

ANACONDA ALLOY 360

Alloy Digest ◽  
1982 ◽  
Vol 31 (11) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
High Speed ◽  
Heat Treating ◽  
High Speed Machining ◽  
Copper Base ◽  
Screw Machine ◽  
Medium Strength ◽  
Machining Operations ◽  
Strength And Ductility

Abstract ANACONDA Alloy 360 is a leaded brass and is the alloy most often used for high-speed machining operations; it fills most of the needs for such purposes. Alloy 360 is the standard free-cutting brass and its machinability has become the standard by which all other copper-base alloys are rated. It has medium strength and ductility. Alloy 360 is used for hardware such as gears and pinions where excellent machinability is of prime importance and for all types of automatic high-speed screw-machine products. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-447. Producer or source: Anaconda American Brass Company.

The Assessment of Cutting Temperature Measurements in High-Speed Machining

2004 ◽  
Vol 471-472 ◽  
pp. 162-166 ◽  
Author(s):  
Yi Wan ◽  
Zhi Tao Tang ◽  
Zhan Qiang Liu ◽  
Xing Ai
Keyword(s):  
High Speed ◽  
Cutting Temperature ◽  
Measurement Methods ◽  
High Speed Machining ◽  
Workpiece Surface ◽  
High Speed Cutting ◽  
Infra Red ◽  
Application Fields ◽  
Infrared Pyrometer ◽  
Selection Of

High-speed machining has received important interest because it leads to an increase of productivity and a better workpiece surface quality. However, the tool wear increases dramatically in high-speed machining (HSM) operations due to the high cutting temperature at the tool-workpiece interface and chip-tool interface. Cutting temperature and its gradient play an important role in tool life and machined part accuracy. This paper reviews different methods of the measurements of cutting temperature, which include: (1) thermocouples---tool-work thermocouple, embedded thermocouple, combination thermocouple and compensation thermocouple (2) optical infrared pyrometer, (3) infra-red photography, (4) thermal paints, (5) microstructure or microhardness observation. Each method has its advantages and limitations. The fundamental principles and application fields of each measurement method are presented, which is useful for the selection of the measurement methods for high-speed cutting temperature.

Experimental Research on High-Speed Machining Pearlitic Gray Cast Iron

2006 ◽  
Vol 315-316 ◽  
pp. 459-463 ◽  
Author(s):  
Yi Wan ◽  
Zhan Qiang Liu ◽  
Xing Ai
Keyword(s):  
Cast Iron ◽  
High Speed ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
High Speed Machining ◽  
Workpiece Surface ◽  
Tool Materials ◽  
Boron Nitrogen

High-speed machining (HSM) has received great interest because it leads to an increase of productivity and a better workpiece surface quality. However, tool wear increases dramatically due to the high temperature at the tool/workpiece interface. Proper selection of cutting tool and cutting parameters is the key process in high-speed machining. In this paper, experiments have been conducted to high speed milling pearlitic cast iron with different tool materials, including polycrystalline cubic boron nitrogen, ceramics and coated cemented carbides. Wear curves and tool life curves have been achieved at various cutting speeds with different cutting tools. If efficiency is considered, Polycrystalline Cubic Boron Nitrogen cutting tool materials are preferred in finish and semi-finish machining. According to the different hardness of cast iron, the appropriate range of cutting speed is from 850 m/min to 1200m/min.

Ceramic Compacts Based on Sintered ZrO2 Nanopowder

2012 ◽  
Vol 727-728 ◽  
pp. 914-918
Author(s):  
Guerold Sergueevitch Bobrovinitchii ◽  
Ana Lúcia Diegues Skury ◽  
Sérgio Neves Monteiro ◽  
Marcia G. de Azevedo
Keyword(s):  
Fracture Toughness ◽  
Particle Size ◽  
High Speed ◽  
Processing Time ◽  
Metallic Matrix ◽  
High Speed Machining ◽  
Time Strength ◽  
High Thermal Resistance ◽  
Pass Through ◽  
Machining Operations

Ceramic based compacts used in tool bits are of fundamental importance for high speed machining operations. Pure ceramic, however, is too brittle. Therefore, conventional hardmetal cermets such as WC-Co are commonly used, in spite of thermal limitations due to the metallic matrix. The present work investigates the properties of sintered ZrO2 nanopowder, stabilized with Yb2O3, as a tough enough pure ceramic with high thermal resistance for tooling compacts. Sintering of ZrO2 nanopowder with particle size below 0.1µm in presence of 2-3% of Yb2O3 was conducted under pressure of 180 to 300 MPa and temperatures from 1500 to 1600°C, during 40 to 60 minutes. Both the density and strength pass through maximum values with temperature and processing time. Strength of 9.500 MPa and hardness of 17.5GPa as well as fracture toughness of 12.5MPa.m1/2 were obtained

AlSiTiN nanocomposite coatings developed via Arc Cathodic PVD: Evaluation of wear resistance via tribological analysis and high speed machining operations

Wear ◽  
2007 ◽  
Vol 263 (7-12) ◽  
pp. 1306-1314 ◽  
Author(s):  
M.G. Faga ◽  
G. Gautier ◽  
R. Calzavarini ◽  
M. Perucca ◽  
E. Aimo Boot ◽  
...  
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Nanocomposite Coatings ◽  
High Speed Machining ◽  
Tribological Analysis ◽  
Machining Operations

Tool wear in high speed machining

2000 ◽  
Vol 10 (PR9) ◽  
pp. Pr9-541-Pr9-546 ◽  
Author(s):  
A. Molinari ◽  
M. Nouari
Keyword(s):  
Tool Wear ◽  
High Speed ◽  
High Speed Machining

AL TECH 203EZ and 303EZ

Alloy Digest ◽  
1978 ◽  
Vol 27 (11) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
High Speed ◽  
Heat Treating ◽  
Temperature Performance ◽  
Final Design ◽  
Mechanical Properties And Corrosion ◽  
Specialty Steel ◽  
Machining Operations ◽  
Machining Characteristics

Abstract AL Tech 203EZ and 303EZ are non-magnetic, austenitic, free-machining stainless steels specifically designed for use in high-speed, automatic machining operations. These modifications retain, in so far as possible, the good mechanical properties and corrosion resistance of the basic compositions which they represent. Sulfur or selenium is added to produce the free-machining characteristics. Data are typical; do not use for specification or final design. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-358. Producer or source: AL Tech Specialty Steel Corporation.

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