Basic Study on Thermo Chemical Turning Method for Metal Bonded Diamond Wheels

2015 ◽  
Vol 656-657 ◽  
pp. 180-184
Author(s):  
Kazuma Nagao ◽  
Keiji Yamada ◽  
Katsuhiko Sekiya ◽  
Ryutaro Tanaka ◽  
Yasuo Yamane
Keyword(s):  
High Speed ◽  
Steel Wire ◽  
Frictional Heat ◽  
Grinding Wheel ◽  
Basic Study ◽  
Diamond Grinding ◽  
Before And After ◽  
Abrasive Stone ◽  
Thermo Couple ◽  
Diamond Abrasive

In this paper, a new truing method is proposed instead of the conventional mechanical truing that has low truing rate for metal bonded diamond grinding wheels. In the proposed method, the metal-bond diamond grinding wheel is rubbed by a steel truer rotating at high speed. Generated frictional heat increases the oxidization and the diffusion of carbon into the steel truer, then diamond grains are thermally attrited on the wheel surface, so that the machinability of wheel is improved. Subsequently, high truing rate is achieved by mechanical truing with abrasive stones. These experiments are conducted using bronze bonded diamond abrasive stones and stainless steel truers, and the relation between truing resistance, truing temperature, and truing rate are investigated. The truing temperature is measured using the thermo couple embedded in the truer. The thermo couple consists of the steel wire embedded and the bronze which is the bonding material of the abrasive stone. The surface profiles of abrasive stones are measured by scanning stylus before and after truing, then the removal volume of abrasive stones is derived from these profiles. Truing rate is also obtained from the removal volume and the truing time. Experimental results for diamond abrasive stones are as follows: The waviness of bronze bond is decreased by proposed truing method. Truing rate is increased as truing resistance and truing temperature increase.

Development of an On-Line Bowl-Shaped Diamond Grinding Wheel Dresser

2006 ◽  
Vol 304-305 ◽  
pp. 545-549
Author(s):  
Jia Shun Shi ◽  
Guang Qi Cai ◽  
Ming Hu ◽  
Q.Y. Liang
Keyword(s):  
Control System ◽  
High Speed ◽  
Control Method ◽  
Wheel Speed ◽  
Grinding Wheel ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
On Line ◽  
And Control

In this paper, a new on-line diamond grinding wheel dresser, which is comprised of high-speed rotatory dressing wheel, micro-feed mechanism and control system, is presented. The principle of micro-feed machine working at requiring dressing depth, the control method of the dressing wheel speed adjusting and dressing depth, and structure of the control system are also introduced. The experiments we have done show that the dresser reach the goal of diamond grinding wheel on-line dressing.

scholarly journals C15 High speed constant-pressure grinding characteristics of PCD with diamond grinding wheel

2014 ◽  
Vol 2014.10 (0) ◽  
pp. 159-160
Author(s):  
Takaaki FUJIMOTO ◽  
Chuanhai YU ◽  
Minoru OTA ◽  
Kai EGASHIRA ◽  
Keishi YAMAGUCHI ◽  
...  
Keyword(s):  
High Speed ◽  
Constant Pressure ◽  
Grinding Wheel ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding

Electrical Discharge Dressing Metal-Bonded Diamond Grinding Wheels with Misted Emulsion

2013 ◽  
Vol 313-314 ◽  
pp. 785-789 ◽  
Author(s):  
Lan Rong Cai ◽  
Wen Yu Ruan ◽  
Min Li
Keyword(s):  
Electrical Discharge ◽  
High Hardness ◽  
Processing Parameters ◽  
Diamond Wheel ◽  
Grinding Wheel ◽  
Three Dimension ◽  
Grinding Wheels ◽  
Diamond Grinding ◽  
Before And After ◽  
Electrical Discharge Dressing

Preparation of superabrasive grinding wheels presents severe challenges due to the high hardness of abrasive grain. In this paper, electrical discharge dressing (EDD) technology with misted emulsion is applied to dressing bronze-bonded diamond wheels. Dressing experiments were carried out. The wheel profiles before and after dressing were measured using a Dektak 6M profilometer. The diamond wheel surface topographies before and after dressing were observed by three-dimension digital microscope. In addition, the performance of EDD’ed wheel was evaluated in practical grinding. It is shown that favorable surface topography can be obtained under suitable processing parameters and EDD misted emulsion with is feasible for metal-bonded diamond grinding wheel.

A Study on a High-Speed NC Gear Grinding Machine Using a Screw-Shaped CBN Wheel

1994 ◽  
Vol 116 (4) ◽  
pp. 1163-1168 ◽  
Author(s):  
T. Emura ◽  
L. Wang ◽  
A. Arakawa
Keyword(s):  
High Speed ◽  
Wave Length ◽  
Ccd Camera ◽  
Grinding Wheel ◽  
Direct Drive ◽  
Two Phase ◽  
Basic Study ◽  
Cbn Wheel ◽  
Gear Grinding ◽  
Grinding Machine

This paper describes a basic study for designing a high-speed NC gear grinding machine using a screw-shaped CBN wheel. Gear grinding machines using screw-shaped grinding wheels are quite prevalent. However, their productivity is not high, because the rotary speed of their spindles is very low. Therefore, the authors raised the maximum rotary speeds of the grinding spindle and the workspindle to 12,000 rpm and 3,000 rpm, respectively, in order to use a high-speed multithread CBN wheel. A magnetic scale whose wave length is long but pitch accuracy is high enough was used for detecting such a high-speed rotation. Since the wave length of the scale is long, a high-resolution interpolation using two-phase type PLL proposed by Emura was used. Both spindles are direct-drive type for removing backlash. When we grind gears, the initial setting between rotary angles of grinding wheel and work is required. The authors tried to automatically set the initial rotary angles by using a CCD camera.

Experimental Study on Performance of Monolayer Brazed Diamond Wheel through Chemical-Mechanical Dressing

2011 ◽  
Vol 325 ◽  
pp. 208-212 ◽  
Author(s):  
Hong Hua Su ◽  
Jiu Hua Xu ◽  
Yu Can Fu ◽  
Wen Feng Ding ◽  
Shuai Wang
Keyword(s):  
Optical Glass ◽  
Ground Surface ◽  
Diamond Wheel ◽  
Substantial Improvement ◽  
Grinding Wheel ◽  
Dressing Method ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
Before And After ◽  
Ground Surface Roughness

The dressing methods of monolayer diamond tool have recently been developed increasingly because a substantial improvement of the ground surface roughness could be achieved with the dressed monolayer diamond tools. In this paper, a new dressing method was proposed, namely chemical-mechanical dressing of the diamond grits. Dressing experiments were carried out on the monolayer brazed diamond grinding wheel. The grit-tip distances from the base of wheel substrate were measured before and after dressing. Grinding experiments were conducted on K9 optical glass after each dressing interval. The roughness parameters of the ground surfaces were measured. The outcome of this attempt appeared highly encouraging, and the dressing of monolayer brazed diamond grinding wheel is effective with the chemical-mechanical dressing.

scholarly journals Study on Grinding of Hypocycloid-Curved Rotor Made of Alumina Ceramics with a Small-Diameter Ball-End Electroplated Diamond Grinding Wheel

2021 ◽  
Vol 15 (1) ◽  
pp. 89-98
Author(s):  
Takumi Imada ◽  
Tadashi Makiyama ◽  
Heisaburo Nakagawa ◽  
Yoshihide Hasegawa ◽  
Kenji Tomoda ◽  
...  
Keyword(s):  
High Precision ◽  
High Speed ◽  
Small Diameter ◽  
Lithium Ion ◽  
Free Form ◽  
Grinding Wheel ◽  
Coating Process ◽  
Alumina Ceramics ◽  
Screw Pump ◽  
Diamond Grinding

The coating process of high-performance films, such as electrodes for lithium-ion batteries, requires high-precision transfer of settling slurries and high-viscosity liquids. This is because transfer characteristics, such as low pulsation and quantitative transfer, have a significant impact on product performance. A single eccentric screw pump is used in this coating process. One component of this pump is a complex-shaped rotor. This rotor must have high precision and high wear and chemical resistance. To meet these requirements, we applied alumina ceramics, which have excellent material properties, to the constituent materials of the rotor. However, for rotors with hypocycloid-curved surfaces, the development of a highly accurate and highly efficient alumina ceramic grinding technology is required. For this purpose, a free-form grinding technique using small-diameter ball-end electroplated diamond grinding wheels is indispensable. In the present study, we carried out machining experiments on inclined and cylindrical surfaces as a basic study. As a result, by increasing the grinding speed with a high-speed spindle, we achieved the precision, quality, and efficiency required for rotor grinding.

0806 High-speed constant-pressure grinding characteristics of PCD with diamond grinding wheel

2015 ◽  
Vol 2015.8 (0) ◽  
pp. _0806-1_-_0806-6_
Author(s):  
Takaaki FUJIMOTO ◽  
Minoru OTA ◽  
Kai EGASHIRA ◽  
Keishi YAMAGUCHI ◽  
Toshikazu NANBU ◽  
...  
Keyword(s):  
High Speed ◽  
Constant Pressure ◽  
Grinding Wheel ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding

Study on Edge Contact Area and Surface Integrity of Workpiece in Point Grinding Process

2009 ◽  
Vol 407-408 ◽  
pp. 577-581
Author(s):  
Shi Chao Xiu ◽  
Zhi Jie Geng ◽  
Guang Qi Cai
Keyword(s):  
Surface Integrity ◽  
Contact Area ◽  
High Speed ◽  
Ground Surface ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Edge Contact ◽  
Cylindrical Grinding ◽  
Theoretic Foundations

During cylindrical grinding process, the geometric configuration and size of the edge contact area between the grinding wheel and workpiece have the heavy effects on the workpiece surface integrity. In consideration of the differences between the point grinding and the conventional high speed cylindrical grinding, the geometric and mathematic models of the edge contact area in point grinding were established. Based on the models, the numerical simulation for the edge contact area was performed. By means of the point grinding experiment, the effect mechanism of the edge contact area on the ground surface integrity was investigated. These will offer the applied theoretic foundations for optimizing the point grinding angles, depth of cut, wheel and workpiece speed, geometrical configuration and size of CBN wheel and some other grinding parameters in point grinding process.

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