CBN Slipstone Super-Accurate Grinding Theoretical Analysis and Application

2009 ◽  
Vol 626-627 ◽  
pp. 165-170 ◽  
Author(s):  
J.F. Chen ◽  
J.H. Cui ◽  
F. Li
Keyword(s):  
Surface Roughness ◽  
Cubic Boron Nitride ◽  
Grinding Force ◽  
Comparative Test ◽  
Impact Factors ◽  
Grinding Temperature ◽  
Positioning Accuracy ◽  
Grinding Machine ◽  
Design And Manufacture ◽  
New Machine

In this paper, the principle and impact factors for super-accurate grinding are analyzed and discussed. A comparative test is made to investigate the differences between advanced cubic boron nitride (CBN) slipstone and ordinary CBN abrasive corundum in performance such as grinding force, grinding temperature, metal surface metamorphic layer and so on. Based on these results, we design and manufacture a carding Laura slot super-accurate grinding machine. This new grinding machine is standard in system, compact in structure and perfect in appearance. Its fixture has a high positioning accuracy. The surface roughness of the Laura manufactured on the new grinding machine has reduced to Ra0.01μm. The productivity of the new machine increases by 25 times.

scholarly journals Study on the Effect of Grinding Pressure on Material Removal Behavior Performed on a Self-Designed Passive Grinding Simulator

2021 ◽  
Vol 11 (9) ◽  
pp. 4128
Author(s):  
Peng-Zhan Liu ◽  
Wen-Jun Zou ◽  
Jin Peng ◽  
Xu-Dong Song ◽  
Fu-Ren Xiao
Keyword(s):  
Residual Stress ◽  
Surface Roughness ◽  
Service Life ◽  
Material Removal ◽  
Removal Rate ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Grinding Process ◽  
Grinding Temperature ◽  
Grinding Efficiency

Passive grinding is a new rail grinding strategy. In this work, the influence of grinding pressure on the removal behaviors of rail material in passive grinding was investigated by using a self-designed passive grinding simulator. Meanwhile, the surface morphology of the rail and grinding wheel were observed, and the grinding force and temperature were measured during the experiment. Results show that the increase of grinding pressure leads to the rise of rail removal rate, i.e., grinding efficiency, surface roughness, residual stress, grinding force and grinding temperature. Inversely, the enhancement of grinding pressure and grinding force will reduce the grinding ratio, which indicates that service life of grinding wheel decreases. The debris presents dissimilar morphology under different grinding pressure, which reflects the distinction in grinding process. Therefore, for rail passive grinding, the appropriate grinding pressure should be selected to balance the grinding quality and the use of grinding wheel.

Influence of granularity of grinding stone on grinding force and material removal in the rail grinding process

2018 ◽  
Vol 233 (2) ◽  
pp. 355-365 ◽  
Author(s):  
Wen-jian Wang ◽  
Kai-kai Gu ◽  
Kun Zhou ◽  
Zhen-bing Cai ◽  
Jun Guo ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Friction Coefficient ◽  
Material Removal ◽  
Grinding Force ◽  
Grinding Process ◽  
Grinding Temperature ◽  
Material Removal Mechanisms ◽  
Rail Grinding ◽  
Grinding Efficiency ◽  
Grinding Stone

The objective of this study is to explore the influence of grinding stone granularity on the grinding force and rail material removal behaviors using a rail grinding friction machine. The results indicate that with the increase in granularity, the grinding force, and friction coefficient in the grinding interface obviously increase, which brings about a rise in the hardness and grinding temperature-rise of rail specimens. The increase in the grinding stone granularity causes a fall in the grinding volume and surface roughness of rail materials and brings about stronger vibration in the grinding interface owing to different material removal mechanisms. In view of the experimental results, the optimization of grinding stone granularity is significant for improving the rail grinding efficiency and surface quality.

Determination of Bore Grinding Machine Parameters to Reduce Cycle Time

2014 ◽  
Vol 974 ◽  
pp. 413-417
Author(s):  
Salakjitt Buddhachakara ◽  
Wipawee Tharmmaphornphilas
Keyword(s):  
Surface Roughness ◽  
Cycle Time ◽  
Control Surface ◽  
Fine Grinding ◽  
Starting Position ◽  
Grinding Machine ◽  
And Control ◽  
Central Composite ◽  
New Machine

This paper applies a central composite design (CCD) to determine proper machine parameters to reduce the cycle time of a bore grinding process. There are 6 machine parameters, which are rough grinding 2 starting position, fine grinding starting position, speed of rough grinding 1, speed of rough grinding 2, speed of rough grinding 3 and speed of fine grinding and 2 types of responses, which are cycle time and surface roughness considered in this study. A half CCD is used to find the optimal machine setup parameters. The experiment shows that new machine conditions can reduce cycle time from 2.98 second per piece to 2.76 second per piece and control surface roughness within specification of 1.0 um. After implementing the new machine conditions in the real setting, we found that the average actual cycle time is 2.76 second per piece with roughness of 0.841 um.

Comparative Research on the Grindability of Ti-6Al-4V and PTMCs with WA Wheel and CBN Wheel

2013 ◽  
Vol 774-776 ◽  
pp. 1075-1079
Author(s):  
Biao Zhao ◽  
Wen Feng Ding ◽  
Qing Miao ◽  
Jiu Hua Xu ◽  
Zhi Wu Liu
Keyword(s):  
Specific Energy ◽  
Comparative Research ◽  
Cubic Boron Nitride ◽  
Chip Thickness ◽  
Grinding Force ◽  
Grinding Temperature ◽  
Matrix Composites ◽  
Titanium Matrix ◽  
Titanium Matrix Composites ◽  
Particulate Reinforced

This article studies the effect of process parameters on the grindability of Ti-6Al-4V and particulate reinforced titanium matrix composites (PTMCs) comparatively, using the wheels of white alundum (WA) and cubic boron nitride (CBN) respectively. The processing variables, such as grinding force, grinding temperature, specific energy were investigated in detail. The results indicate that the grinding force and temperature with WA wheels were obviously larger than that of CBN wheels. The specific energy of Ti-6Al-4V and PTMCs decreased gradually with the increase in the maximum underformed chip thickness using the two different wheels.

Study on Super-Precision Grinding Processing to the Spindle with CBN Slipstone

2010 ◽  
Vol 135 ◽  
pp. 255-259
Author(s):  
Jiang Hong Cui ◽  
Jian Ru Shi ◽  
Jian Fei Chen
Keyword(s):  
Surface Roughness ◽  
Surface Quality ◽  
Comparative Test ◽  
Precision Grinding ◽  
New Machine

The spindle is an important part of twistering and winding in spinning frame. The spindle blade is the key element of spindle. As the development of hi-speed spindles, grinding accuracy and surface quality are greatly requested for the bearing class surface of the spindle. In the paper, an idea is presented to adopt super-precision grinding to machine the spindle blade. Throughing analyzing and discussing the super-precision grinding principle, A super-precision grinder was designed. A comparative test is made to investigate the differences between advanced CBN slipstone and ordinary abrasive corundum in performance. As a result, the surface roughness of the spindle blade which has been manufactured on the new grinder has reduced to Ra 0.01μm. The productivity of the new machine increases by 15 times.

Experimental Verification of Effect of Grinding Fluid Excited by Ultrasonic Vibration

2012 ◽  
Vol 523-524 ◽  
pp. 197-202 ◽  
Author(s):  
Jun Ishimatsu ◽  
Hiromi Isobe ◽  
Keisuke Hara
Keyword(s):  
Surface Roughness ◽  
Resonant Frequency ◽  
Ultrasonic Vibration ◽  
Experimental Verification ◽  
Grinding Force ◽  
Vibration Energy ◽  
Grinding Wheel ◽  
Grinding Fluid ◽  
Alloy Tool ◽  
Grinding Machine

The grinding performance is strongly affected by grain condition. Especially loading directly raises the grinding force, reduces tool life and deteriorates accuracy of machining. In this study, ultrasonic exciter which applies vibration energy on grinding fluid was developed. The resonant frequency of 28kHz. The exciter is set between the fluid supplying nozzle and grinding wheel. The discharging grinding fluid from the nozzle is supplied to grinding wheel between the teeth of comb-shape horn. The performance is verified on surface grinding machine with vitrified WA grinding wheel. It was experimentally demonstrated that the excited grinding fluid prevented the loading and improved the surface roughness even for grinding of aluminum. And also improvement of surface roughness was recognized on alloy tool steel.

scholarly journals OPTIMALISASI PROSES GERINDA UNTUK PERMUKAAN

2012 ◽  
Vol 11 (1) ◽  
pp. 26
Author(s):  
ARYA MAHENDRA SAKTI
Keyword(s):  
Surface Roughness ◽  
Room Temperature ◽  
Heat Energy ◽  
Work Piece ◽  
Air Cooling ◽  
Grinding Temperature ◽  
Cooling Method ◽  
Surface Work ◽  
Grinding Machine ◽  
Table Speed

Basically, surface grinding is mechanical process that result high temperature and chemicalreaction on surface work piece. On this process, the heat energy has been released along ofthe surface. A part of the energy would be transferred to chip and the other would be continuedto the environment by grinder and work piece. Use of coolant on the surface of the object will befunction as lubricant, which can reduce friction between grinder and the object. Moreover, ingrinding process, cooling can effect on temperature and surface roughness. This research usedfactorial design 2x3x3 to evaluate the effect some variables process such as table speed, depthof cut also cooling method on temperature and surface roughness. High pressure air and air inroom temperature are kinds of cooling method in the process, the result of experiment would beanalysis by ANAVA. The experiment shows that temperature in air cooling method it is lowerthan by air of room temperature cooling method. The surface roughness of the work piece in aircooling method is the lowest. The faster table speed of grinding machine caused that the lowerof the grinding temperature and the work piece surface roughness. Moreover, the higher depthof cut would cause the higher grinding temperature and surface roughness.

Grinding Characteristics and Mechanism of Ceramic Alumina Wheels on Aeronautical Alloys

2012 ◽  
Vol 591-593 ◽  
pp. 373-376
Author(s):  
Hong Xia Zhang ◽  
Wu Yi Chen ◽  
Xiu Zhuo Fu ◽  
Li Xia Huang
Keyword(s):  
Surface Roughness ◽  
Sol Gel ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Grinding Temperature ◽  
Microcrystalline Structure ◽  
High Temperature Alloy ◽  
Grinding Mechanism ◽  
Abrasive Tools ◽  
Temperature Surface

The present investigation was dedicated to elucidate grinding characteristics during surface grinding of titanium alloy(TC6) and high temperature alloy (GH2132) by using silicon carbide(SiC) and sol-gel (SG) wheel respectively. The grinding characteristic of SG wheel on aeronautical alloys was studied on the base of systematical measurement of the grinding force, grinding temperature, surface roughness and grinding ratio. The results indicated that the SG grinding wheel possesses excellent grinding properties and is more suitable for grinding these aeronautical alloys compared with conventional abrasive tools. Finally, the grinding mechanism of new-typed SG wheel was unveiled on the base of the microcrystalline structure analysis of SG grains.

Limitations of an Indentation Model for Grinding Gamma Titanium Aluminide

2002 ◽  
Author(s):  
H. Ali Razavi ◽  
Steven Danyluk ◽  
Thomas R. Kurfess
Keyword(s):  
Force Control ◽  
Titanium Aluminide ◽  
Normal Force ◽  
Removal Rate ◽  
Cubic Boron Nitride ◽  
Normal Component ◽  
Grinding Force ◽  
Cutting Depth ◽  
Gamma Titanium Aluminide ◽  
Gamma Titanium

This paper explores the limitations of a previously reported indentation model that correlated the depth of plastic deformation and the normal component of the grinding force. The indentation model for grinding is studied using force control grinding of gamma titanium aluminide (TiAl-γ). Reciprocating surface grinding is carried out for a range of normal force 15–90 N, a cutting depth of 20–40 μm and removal rate of 1–9 mm3/sec using diamond, cubic boron nitride (CBN) and aluminum oxide (Al2O3) abrasives. The experimental data show that the indentation model for grinding is a valid approximation when the normal component of grinding force exceeds some value that is abrasive dependent.

Investigation on Surface Grinding of Ti-6Al-4V Using Minimum Quantity Lubrication

2012 ◽  
Vol 500 ◽  
pp. 308-313 ◽  
Author(s):  
Guo Qiang Guo ◽  
Zhi Qiang Liu ◽  
Xiao Hu Zheng ◽  
Ming Chen
Keyword(s):  
Surface Roughness ◽  
Plastic Deformation ◽  
Surface Morphology ◽  
Specific Energy ◽  
Minimum Quantity Lubrication ◽  
Grinding Force ◽  
Dry Grinding ◽  
Surface Damages ◽  
Side Flow ◽  
Mql System

This paper investigates the effects of MQL system on the grinding performance of Ti-6Al-4V using SiC abrasive, the evaluation of the performance consisted of analyzing the grinding force, surface roughness and surface morphology. The experiment result indicated that the favorable lubricating effect of MQL oil makes it has the lowest value of grinding force, specific energy and force raito. MQL has better surface finish than dry grinding and fluid grinding has the lowest value of surface roughness under different grinding depth. Surface damages such as: side flow, plastic deformation, redeposition are present in dry and fluid grinding. As grinding depth increased, the damages become much more severe. But in MQL condition, it gives better surface integrity than dry and fluid grinding.

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