金刚石与磨料磨具工程

Performance evaluation of self-propagating high-temperature synthesized diamond grinding head

DUAN Duanzhi, LUO Weidong, XIAO Bing, HAN Linlin, BU Yue

2017, 37(3): 1-5. doi: 10.13394/j.cnki.jgszz.2017.3.0001

Abstract(361)

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Abstract:
To study the influence of self-propagating process on the performance of diamond grinding head, high-frequency induction heating was used to induce self-propagating systhesis of Al, Ti, Cu, Ni and Sn powder and produce the heads.Microstructure of the heads and the bonding interface between diamond a...

Effect of processing on toughness index of diamond grains during vacuum brazing

LIU Fan, PAN Bingsuo, XIE Tao, ZHANG Jianwei

2017, 37(3): 6-10. doi: 10.13394/j.cnki.jgszz.2017.3.0002

Abstract(388)

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Abstract:
To reduce the thermal damage when brazing diamond, four solutions are proposed and tested according to the thermal damage mechanism of diamonds.SEM observation and toughness index test are used to analyze those solutions.Resultsshow that reducing oxygen content in the stove has limited effect on imp...

Preparation and drilling properties of dry drilling diamond bit

XU Liang, LIU Yibo, XU Qiang, SHEN Ningning

2017, 37(3): 11-14. doi: 10.13394/j.cnki.jgszz.2017.3.003

Abstract(403)

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Abstract:
The advantages of dry drilling bit are introduced, as well as the status of domestic dry drilling market, and the principle of the bit matrix design.Ultra-fine tungsten copper alloy powder helps to solve the problems of sintering and drilling in experiment.Tungsten copper alloy powder (mass fraction...

Effect of Al₂O₃ hollow sphere on properties of resin bond diamond disc in sapphire grinding

SHI Linfeng, HAN Xue, GAO Yongjuan, LIU Quanwei

2017, 37(3): 15-18. doi: 10.13394/j.cnki.jgszz.2017.3.004

Abstract(386)

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Abstract:
To improve the lapping effect of sapphire grinding, Al₂O₃ hollow sphere is added into resin bond diamond grinding disc.Effect of sphere size and volume fraction on strength of the bond and performance of the disc are studied through mechanical test, SEM analysis and actual grinding.Resultsshow that ...

Influence of different CBN grains on grinding performance of resin bonded CBN grinding wheel

LI Kehua, XIONG Huajun, GAO Yongjuan, SHI Linfeng, HAN Xue

2017, 37(3): 19-22,34. doi: 10.13394/j.cnki.jgszz.2017.3.0005

Abstract(461)

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Abstract:
The compressive fracture strength, toughness index (TI) and thermal toughness index (TTI) data of 6kinds of different CBN abrasive grains are studied, and these grains are made into resin bonded CBN grinding wheel, respectively.The grinding ratios of different CBN abrasives on different materials, s...

Influence of line defect in cemented carbide substrate on bonding strength between diamond coating film and substrate

ZHANG Kuilin, CHEN Jun, HUANG Zhuo, JIAN Xiaogang

2017, 37(3): 23-28. doi: 10.13394/j.cnki.jgszz.2017.3.0006

Abstract(414)

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Abstract:
The first principles plane wave pseudopotential method based upon density functional theory (DFT) is used to investigate the bonding strength of diamond coating film on cemented carbide substrate with different line defect ratios.The interface molecular models between diamond coating film and substr...

Progress on dressing technology of monolayer brazed diamond grinding wheel

DENG Hui, DENG Chaohui

2017, 37(3): 29-34. doi: 10.13394/j.cnki.jgszz.2017.3.0007

Abstract(397)

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Abstract:
The current dressing methods of monolayer brazed diamond grinding wheel and their latest research progress are reviewed, and the problems in the practical application are pointed out.In view of these problems, the development concept of dressing technology of monolayer brazed diamond grinding wheel ...

Characteristic changes of acoustic emission(AE)signal during high speed deep grinding of cemented carbide PA30

GUO Li, DU Houbin, DENG Yu

2017, 37(3): 35-39. doi: 10.13394/j.cnki.jgszz.2017.3.0008

Abstract(409)

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Abstract:
In acoustic emission (AE) experiment on high speed deep grinding cemented carbide PA30, which is a hard difficult-to-machine material, the root-mean-square characteristic parameters of acoustic emission signal (AE_RMS) and grinding force increase as the workpiece speed and the depth of cut increase, ...

Analysis on uniformity of particle trajectories in laser wafer polishing

KANG Renke, ZHAO Haiyang, ZHU Xianglong, JIAO Zhenhua

2017, 37(3): 40-45. doi: 10.13394/j.cnki.jgszz.2017.3.0009

Abstract(412)

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Abstract:
To analyze effect of rotation ratio α and swing ratio β on distribution uniformity of grain trajectory during wafer polishing, two models are established, namely relative velocity between wafer and pad, and grain trajectory on wafer surface.Distribution law of relative velocity and particle trajecto...

Influencing characteristic of submicroscopic chamfering cutting edge on the cutting property of cemented carbide insert

HE Genghuang, LI Lingxiang, ZOU Lingli, CHENG Cheng, LIU Xianli

2017, 37(3): 46-54. doi: 10.13394/j.cnki.jgszz.2017.3.0010

Abstract(399)

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Abstract:
In order to study the action mechanism of micro cutting edge form of carbide insert on the cutting performance, aiming at the problems of tipping and brittle fracture of carbide insert during interrupted cutting, interrupted cutting experiments are carried out using two different grades of cemented ...

Prediction of subsurface damage of endless diamond wire sawing YAG crystal

LIU Wentao, ZHAO Huiying, LI Bin, ZHAO Lingyu, YU Hechun, FANG Hongjun

2017, 37(3): 55-61,68. doi: 10.13394/j.cnki.jgszz.2017.3.0011

Abstract(434)

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Abstract:
The material performance and the service life of YAG (Y₃Al₅O₁₂) crystal are reduced due to subsurface damage.Based on the classical fracture mechanics model of brittle solids and the formula to calculate median crack depth, it is found out that the median crack is the main factor of subsurface damag...

Experimental research on ultrasonic cutting honeycomb cores by disc cutter

NIU Jinglu, ZHU Xianglong, KANG Renke, WANG Yidan, DONG Zhigang

2017, 37(3): 62-68. doi: 10.13394/j.cnki.jgszz.2017.3.0012

Abstract(468)

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Abstract:
To improve the quality and efficiency of Nomex honeycomb material, actual experiments are used to test the cutting force during ultrasonic cutting.The influencing factors and changing laws of the force are studied.The surface of honeycomb is observed after cutting.Regression analysis is used to rese...

Research on dressing and truing of microarc diamond tool

XIA Zhihui, JIA Lu, ZHANG Xiaofeng, CHU Chong

2017, 37(3): 69-73. doi: 10.13394/j.cnki.jgszz.2017.3.0013

Abstract(413)

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Abstract:
The microarc diamond tool is widely applied in ultra-precision machining.Research on micro arc diamond cutter dressing technology is implemented based on mechanical grinding.Through the analysis of the preparation technology of microarc diamond tool and its difficulty, a new method to dress the micr...

Optimal design of cutting performance of diamond ordered arrangement saw blade

ZHANG Wenzhong, YANG Hong

2017, 37(3): 74-77,80. doi: 10.13394/j.cnki.jgszz.2017.3.0014

Abstract(446)

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Abstract:
The technology of independent research and development on diamond ordered arrangement is used to the produce diamond three-dimensional ordered arrangement saw blade.Then, the cutting performance of the blade is examined by sawing contrast experiment.The results show that diamond three-dimensional or...

Design and application of new elastic turntable applied for compression moulding

XING Bo, LU Tao, YAN Ning, SHAO Junyong, HAN Xin, LI Hongtao

2017, 37(3): 78-80. doi: 10.13394/j.cnki.jgszz.2017.3.0015

Abstract(341)

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Compression moulding is the key process in the preparation of the abrasive layer of super hard material grinding wheel.A kind of elastic turntable is designed to replace manual operation, improve production efficiency, and stabilize the quality.The composition and working principle of the elastic tu...

Preparation of rapid electroplating diamond wire saw

DAI Xiaonan, HE Weichun, LI Zhengxin, HE Jingyuan

2017, 37(3): 81-87. doi: 10.13394/j.cnki.jgszz.2017.3.0016

Abstract(517)

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Abstract:
In order to improve the efficiency of preparing of diamond wire saw, sanding process is improved by chemical nickel plating on diamond micropowder surface, magnetization steel wire substrate.SEM, EDS and Gauss meter are used to study parameters influence on efficiency and durability.The experimental...

Coarse grinding parameters on sapphire wafer

DONG Yunna

2017, 37(3): 88-90. doi: 10.13394/j.cnki.jgszz.2017.3.0017

Abstract(427)

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Abstract:
Coarse grinding sapphire wafer surface technology is researched by using 61 μm boron carbide, Single factor experiment is used to discuss and test the influence of slurry, lapping pressure and boron carbide content.Resultsshow that the best effect appears when mass fraction of boron carbide is 20% w...

Surface quality of grinding optical glasses using eletroplated diamond wheel

MENG Xinxin, LIN Youxi, REN Zhiying

2017, 37(3): 91-95. doi: 10.13394/j.cnki.jgszz.2017.3.0018

Abstract(527)

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Abstract:
Optical glass is widely applied in aerospace, photoelectricity, space technology, precision engineering and other fields.Requirements on surface quality of optical glass are getting higher and higher.In this paper, grinding optical glasses with large abrasive eletroplated diamond wheel is researched...

2017 Vol. 37, No. 3

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