scholarly journals Cutting Temperature and Forces in Machining of High-Performance Materials with Self-Propelled Rotary Tool.

1992 ◽  
Vol 35 (1) ◽  
pp. 180-185 ◽  
Author(s):  
Ping CHEN
Keyword(s):  
High Performance ◽  
Cutting Temperature ◽  
Rotary Tool

Monitoring of End-Mill Process Based on Infrared Imagery with a High Speed Thermography

2014 ◽  
Vol 625 ◽  
pp. 213-218 ◽  
Author(s):  
Masatoshi Shindou ◽  
Hiroyuki Kodama ◽  
Toshiki Hirogaki ◽  
Eiichi Aoyama
Keyword(s):  
High Speed ◽  
High Performance ◽  
Cutting Temperature ◽  
End Mill ◽  
Tool Temperature ◽  
Time Duration ◽  
Rotating Speed ◽  
Tool Position ◽  
The Relationship ◽  
Mill Process

In this study, we perform the end-mill process of a difficult-to-cut material (JIS SUS310 stainless steel) and observe it with high performance infrared thermography. Considering the rotating angle of end-mill tool, a pixel temperature in each frame is investigated to obtain the tool temperature variation after cutting of each tooth in end-mill process. The tool temperature distribution can be analyzed at each rotating tool position in end-mill process from imageries, considering the relationship between the time duration of each frame and the rotating speed of an end-mill tool. Moreover, the tool/holder shape and the number of cutting teeth can be seen to affect the cutting temperature because the tool heat capacity and the heat input are different. The examination and analytical results show this method to be effective to estimate the tool temperature in the end-mill process sufficiently.

Experimental Study on Deep Hole Drilling Gamma Titanium Aluminide

2010 ◽  
Vol 455 ◽  
pp. 293-296 ◽  
Author(s):  
Lin Zhu ◽  
Xin Chen ◽  
Bernd Viehweger
Keyword(s):  
Titanium Aluminide ◽  
High Performance ◽  
Cutting Temperature ◽  
Tool Material ◽  
High Strength ◽  
Experimental Result ◽  
Hole Drilling ◽  
Deep Hole ◽  
Gamma Titanium Aluminide ◽  
Deep Hole Drilling

γ-titanium aluminide is a new intermetallic structural material. γ-titanium aluminide alloy has the advantages of high temperature resistance, high performance of anti-oxidation effect, low-density, high specific strength and rigidity etc. But high strength, hardness and brittleness of the material also make processing difficultly. High cutting force and cutting temperature affecting a decline in cutting lifetime and cutting efficiency. This problem is more acute in deep hole drilling. In this paper, we have analyzed the cutting performance of γ-titanium aluminide and designed a deep-hole drills with appropriate tool material and geometric parameters. The experimental result shows: this drill bit is stable and efficient in drilling and can achieve a good quality.

scholarly journals On the Machinability Evolution in Asymmetric Milling of TC25 Ti Alloy Aiming at High Performance Machining

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7306
Author(s):  
Xueli Song ◽  
Hongshan Zhang
Keyword(s):  
Surface Roughness ◽  
Cutting Force ◽  
High Performance ◽  
High Efficiency ◽  
Cutting Temperature ◽  
Cutting Speed ◽  
Depth Of Cut ◽  
Balanced Development ◽  
Radial Depth ◽  
The Asymmetry

In this paper, the evolutions of cutting force, cutting temperature, and surface roughness, and the corresponding machinability in asymmetric up-milling of TC25 alloy are investigated. The results indicated that radial depth of cut generated opposite influence on the cutting force/cutting temperature versus surface roughness. The reason can be accounted as the intertwining of feed marks at low radial depth of cut, and the mechanism of hard cutting at a high radial depth of cut. Moreover, the asymmetry has a significant effect on the machinability in asymmetry up-milling TC25 alloy. Changing the asymmetry, i.e., the radial depth of cut, can alter the machinability while maintain the balanced development of various indexes. The machinability reaches the best when the radial depth of cut is ae = 8 mm. The axial depth of cut and feed per tooth should be selected as large as possible to avoid work hardening and to improve machining efficiency in asymmetric up-milling TC25 alloy. The cutting speed should be controlled within Vc = 100–120 m/min to obtain better machinability. On the basis of this research, it is expected to find optimized milling parameters to realize high efficiency milling of TC25 alloy.

scholarly journals Predicting Cutting Force and Primary Shear Behavior in Micro-Textured Tools Assisted Machining of AISI 630: Numerical Modeling and Taguchi Analysis

Micromachines ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 91
Author(s):  
Shafahat Ali ◽  
Said Abdallah ◽  
Salman Pervaiz
Keyword(s):  
Tool Life ◽  
High Performance ◽  
Metal Cutting ◽  
Cutting Tool ◽  
Orthogonal Cutting ◽  
Cutting Tools ◽  
Cutting Temperature ◽  
Cutting Process ◽  
Cutting Fluids ◽  
Machining Performance

The cutting tool heats up during the cutting of high-performance super alloys and it negatively affects the life of the cutting tool. Improved tool life can enhance both the machinability and sustainability of the cutting process. To improve the tool life preferably cutting fluids are utilized. However, the majority of cutting fluids are non-biodegradable in nature and pose harmful threats to the environment. It has been established in the metal cutting literature that introducing microgrooves at the cutting tool rake face can significantly reduce the coefficient of friction (COF). Reduction in the COF promotes anti-adhesive behavior that improves the tool life. The current study numerically investigates the orthogonal cutting process of AISI 630 Stainless Steel using different micro grooved cutting tools. Results of the numerical simulations point to the positive influence of micro grooves on tool life. The results of the main effects found that the cutting temperature was decreased by approximately 10% and 7% with rectangular and triangular micro grooved tools, respectively. Over machining performance indicated that rectangular micro groove tools provided comparatively better performance.

Cutting Temperature Measurement in Turning with Actively Driven Rotary Tool

2008 ◽  
Vol 389-390 ◽  
pp. 138-143 ◽  
Author(s):  
Suryadiwansa Harun ◽  
Toshiro Shibasaka ◽  
Toshimichi Moriwaki
Keyword(s):  
Inclination Angle ◽  
Rotational Speed ◽  
Minimum Temperature ◽  
Cutting Temperature ◽  
Tool Rotational Speed ◽  
Rotary Tool ◽  
Minimum Value ◽  
Edge Temperature ◽  
Tool Rotation ◽  
Constantan Wire

In this paper, turning with actively driven rotary tool was investigated. The influence of machining conditions such as tool rotational speed and inclination angle on the cutting edge temperature is examined experimentally. The temperature was measured by a thermocouple of constantan wire and work material. Experimental results show that the cutting temperature decreases with increasing tool rotational speed to a minimum value at a certain tool rotational speed and then increase. Next, the minimum temperature recorded by tool rotation was approximately 150oC lower than that the cutting with a non-rotating tool. Finally, the cutting temperature also decreases with the increase of inclination angle to a minimum value at an inclination angle.

Experimental Study on Orthogonal Cutting of Ti6Al4V with Surface Micro-Groove Textured Cutting Tool

2012 ◽  
Vol 723 ◽  
pp. 243-246 ◽  
Author(s):  
Bao Yun Qi ◽  
Liang Li
Keyword(s):  
Cutting Force ◽  
High Performance ◽  
Cutting Tool ◽  
Orthogonal Cutting ◽  
Cutting Temperature ◽  
Research Direction ◽  
Cutting Inserts ◽  
Minimal Quantity ◽  
New Research ◽  
Performance Surface

Currently biomimetic tribology study shows that high performance surface texture can achieve good friction, anti-adhesion and improve the wear resistance, which brings a new research direction for tool antifriction technology. The orthogonal cutting tests of surface micro-groove cutting tool in machining titanium alloy were presented. Different types of micro-grooves were made using laser in the rake face of uncoated tungsten carbide cutting inserts. Dry with no lubricant and minimal quantity lubricant (MQL) were used as lubrication conditions. Cutting force and cutting temperature were measured and compared. It was found that under MQL condition the surface micro-grooves could effectively improve the friction status between the tool and chip, thereby reducing cutting force and cutting temperature, and also reduce cutting temperature under no lubricant condition. The micro-grooves paralleling with cutting edge had the best effect in three types of micro-grooves.

A High Performance Energy Analyzer for Use in Electron Scanning Microscopy

1969 ◽  
Vol 27 ◽  
pp. 14-15
Author(s):  
A. V. Crewe ◽  
M. Isaacson ◽  
D. Johnson
Keyword(s):  
High Performance ◽  
Vertical Plane ◽  
Median Plane ◽  
Electron Gun ◽  
Uniform Field ◽  
Loss Mechanism ◽  
Electron Scanning Microscopy ◽  
Sector Type ◽  
Double Focusing ◽  
Electron Energy Loss

A double focusing magnetic spectrometer has been constructed for use with a field emission electron gun scanning microscope in order to study the electron energy loss mechanism in thin specimens. It is of the uniform field sector type with curved pole pieces. The shape of the pole pieces is determined by requiring that all particles be focused to a point at the image slit (point 1). The resultant shape gives perfect focusing in the median plane (Fig. 1) and first order focusing in the vertical plane (Fig. 2).

Vacuum System to Minimize the Specimen Contamination of High-Performance EM

1977 ◽  
Vol 35 ◽  
pp. 68-69
Author(s):  
N. Yoshimura ◽  
K. Shirota ◽  
T. Etoh
Keyword(s):  
Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
High Vacuum ◽  
Vacuum System ◽  
Pump System ◽  
Pumping System ◽  
Diffusion Pump ◽  
Almost All ◽  
Cascade Type

One of the most important requirements for a high-performance EM, especially an analytical EM using a fine beam probe, is to prevent specimen contamination by providing a clean high vacuum in the vicinity of the specimen. However, in almost all commercial EMs, the pressure in the vicinity of the specimen under observation is usually more than ten times higher than the pressure measured at the punping line. The EM column inevitably requires the use of greased Viton O-rings for fine movement, and specimens and films need to be exchanged frequently and several attachments may also be exchanged. For these reasons, a high speed pumping system, as well as a clean vacuum system, is now required. A newly developed electron microscope, the JEM-100CX features clean high vacuum in the vicinity of the specimen, realized by the use of a CASCADE type diffusion pump system which has been essentially improved over its predeces- sorD employed on the JEM-100C.

Use of the Magnetostatic Analogue In Electromagnetic Lens Engineering

1970 ◽  
Vol 28 ◽  
pp. 360-361
Author(s):  
John W. Coleman
Keyword(s):  
Boundary Conditions ◽  
High Performance ◽  
Force Fields ◽  
Optical Design ◽  
Direct Conversion ◽  
Design Engineering ◽  
Design Data ◽  
Scalar Potentials ◽  
Geometric Elements ◽  
At Will

In the design engineering of high performance electromagnetic lenses, the direct conversion of electron optical design data into drawings for reliable hardware is oftentimes difficult, especially in terms of how to mount parts to each other, how to tolerance dimensions, and how to specify finishes. An answer to this is in the use of magnetostatic analytics, corresponding to boundary conditions for the optical design. With such models, the magnetostatic force on a test pole along the axis may be examined, and in this way one may obtain priority listings for holding dimensions, relieving stresses, etc..The development of magnetostatic models most easily proceeds from the derivation of scalar potentials of separate geometric elements. These potentials can then be conbined at will because of the superposition characteristic of conservative force fields.

Prospects for convergent beam electron diffraction with a 200kV cold field-emission transmission electron microscope

1991 ◽  
Vol 49 ◽  
pp. 466-467
Author(s):  
J W Steeds ◽  
R Vincent
Keyword(s):  
Field Emission ◽  
High Performance ◽  
Small Diameter ◽  
Convergent Beam Electron Diffraction ◽  
Zone Axis ◽  
Medium Voltage ◽  
Transmission Electron ◽  
Good Crystallinity ◽  
Special Modification ◽  
Convergent Beam

We review the analytical powers which will become more widely available as medium voltage (200-300kV) TEMs with facilities for CBED on a nanometre scale come onto the market. Of course, high performance cold field emission STEMs have now been in operation for about twenty years, but it is only in relatively few laboratories that special modification has permitted the performance of CBED experiments. Most notable amongst these pioneering projects is the work in Arizona by Cowley and Spence and, more recently, that in Cambridge by Rodenburg and McMullan.There are a large number of potential advantages of a high intensity, small diameter, focussed probe. We discuss first the advantages for probes larger than the projected unit cell of the crystal under investigation. In this situation we are able to perform CBED on local regions of good crystallinity. Zone axis patterns often contain information which is very sensitive to thickness changes as small as 5nm. In conventional CBED, with a lOnm source, it is very likely that the information will be degraded by thickness averaging within the illuminated area.

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