Characterization of surface polishing with spindle mounted abrasive disk-type filament tool for manufacturing of machine tool sliding guideways

Aufgrund der erschwerten Zugänglichkeit der Schleifschneckenflanke und der veränderlichen Kontaktbedingungen beim kontinuierlichen Wälzschleifen wurden in bisherigen Arbeiten oftmals die Durchdringungsgrößen zwischen Werkzeug und Werkstück zur Beschreibung oder Modellierung des Prozesses herangezogen. Mit der am Werkzeugmaschinenlabor (WZL) entwickelten Methodik kann in Zukunft auch die Topographie der Schleifschnecke durch Kennwerte beschrieben und somit in Modellen, zum Beispiel zur Vorhersage der Kraft oder des Verschleißes, berücksichtigt werden.   Due to the difficult accessibility of the grinding worm flank and the variable contact conditions of continuous generating gear grinding, the undeformed chip geometry has often been used in scientific investigations to describe or model the process. With the new methodology developed at the Machine Tool Laboratory (WZL), the topography of the grinding worm can be described with characteristic values and thus can be taken into account in models, e.g. for prediction of force or tool wear.

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Investigation about the characterization of machine tool spindle stiffness for intelligent CNC end milling

Robotics and Computer-Integrated Manufacturing ◽

10.1016/j.rcim.2014.12.001 ◽

2015 ◽

Vol 34 ◽

pp. 133-139 ◽

Cited By ~ 10

Author(s):

Ahmed A.D. Sarhan ◽

Atsushi Matsubara

Keyword(s):

Machine Tool ◽

End Milling ◽

Machine Tool Spindle ◽

Cnc End Milling

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Characterizations on Morphology and Adhesion of Calcium Silicate Coating on Ti6Al4V Substrate

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.694.83 ◽

2016 ◽

Vol 694 ◽

pp. 83-87 ◽

Cited By ~ 1

Author(s):

Farah Atiqah Abdul Azam ◽

Hamisah Ismail ◽

Roslinda Shamsudin ◽

Zalita Zainuddin ◽

Muhammad Azmi Abdul Hamid

Keyword(s):

Calcium Silicate ◽

X Ray Diffraction ◽

X Ray ◽

Substrate Adhesion ◽

Surface Polishing ◽

Ti6al4v Substrate ◽

Heat Treated ◽

Evaporation Technique ◽

Abrasive Paper

The morphology and surface topography of calcium silicate coated on Ti6Al4V implant were studied using field emission scanning electron microscopy (FESEM) and X-ray diffraction analysis (XRD) respectively. The surface of titanium alloy plates was mechanically ground with 320, 800 and 1200 grits of SiC abrasive paper followed by surface polishing into mirror-like finish. The synthesized β-CaSiO3 was deposited onto the Ti6Al4V substrate using electron beam evaporator. After coating, calcium silicate was heat treated at 500 °C for 1 hour. Characterization of the calcium silicate coated on Ti6Al4V substrate using e-beam evaporation technique demonstrated that 5 wt% of PVA addition was able to improve the coating-to-substrate adhesion.

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EXPERIMENTAL CHARACTERIZATION OF QUASIPERIODICITY AND CHAOS IN A MECHANICAL SYSTEM WITH DELAY

International Journal of Bifurcation and Chaos ◽

10.1142/s0218127499000031 ◽

1999 ◽

Vol 09 (01) ◽

pp. 49-65 ◽

Cited By ~ 19

Author(s):

M. A. JOHNSON ◽

F. C. MOON

Keyword(s):

Machine Tool ◽

Mechanical System ◽

Experimental Technique ◽

Poincaré Sections ◽

Chaotic Vibrations ◽

Tool Vibrations ◽

Delay Differential ◽

Poincare Sections ◽

Equation With Delay

We present an electro-mechanical system with finite delay whose construction was motivated by delay differential equations used to describe machine tool vibrations [Johnson, 1996; Moon & Johnson, 1998]. We show that the electro-mechanical system is capable of exhibiting periodic, quasiperiodic and chaotic vibrations. We provide a novel experimental technique for creating real-time Poincaré sections for systems with delay. This experimental technique was also applied to machine tool vibrations [Johnson, 1996]. Experimental Poincaré sections clearly show the existence of tori, and reveal the tori bifurcation sequence which leads to chaotic vibrations. The electro-mechanical system can be modeled by a single second-order differential equation with delay and a cubic nonlinearity. We show that the simple mathematical model fully replicates the bifurcation sequence seen in the electro-mechanical system.

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Variation of Surface Roughness of Ti3SiC2 Disk during Polishing in Water and Alcohols

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.602-603.511 ◽

2014 ◽

Vol 602-603 ◽

pp. 511-514

Author(s):

Wan Xiu Hai ◽

Jun Ling Zeng ◽

Jun Hu Meng ◽

Jin Jun Lu

Keyword(s):

Surface Roughness ◽

Hot Pressing ◽

Mechanical Polishing ◽

Polishing Process ◽

Surface Polishing ◽

3D Surface ◽

Diamond Particles ◽

Abrasive Disk ◽

Reactive Hot Pressing

The surface polishing of Ti3SiC2 disk in fluids (water, ethanol, propanol, glycol, and glycerol) is conducted on a Buehler grinder/polisher and evaluated using surface roughness. Using Buehler automatic grinder/polisher, the Ti3SiC2 disks are grinded and polished in the as-mentioned lubricants by grinding disk of diamond with sizes of 45 μm to 3 μm. The surface roughnesses of Ti3SiC2 disks at each stage are measured by 3D surface profiler. The results show that the lowest surface roughness (Ra) of Ti3SiC2 disk obtained by mechanical polishing is 0.04 μm. The optimum polishing process of Ti3SiC2 disk is as follows: using water as lubricant, at a load of 5 N, for steps 1 to 4, the Ti3SiC2 and grinding disk rotates comparatively and the sizes of diamond particles on the abrasive disk are 45, 15, 9, and 3 μm, respectively. For step 5, the abrasive disk is woven cloth with no diamond particles. The duration of each step is 5 min. Using the same polishing process, the surface roughness of Ti3SiC2 disk by direct hot pressing is lower than that by in situ reactive hot pressing. Using the same polishing process but different lubricants, the surface roughness of the Ti3SiC2 disks increases in the order of water, ethanol, propanol, glycol, and glycerol. In water, the surface roughness of Ti3SiC2 disk decreases with the increasing quantity of water and polishing duration.

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