金刚石与磨料磨具工程

Kinematic model of normal-trach grinding for spherical parts

LIU Wei, DENG Chaohui, WAN Linlin

2016, 36(4): 1-5,23. doi: 10.13394/j.cnki.jgszz.2016.4.0001

Abstract(418)

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Abstract:
According to current requirements of efficient and precision machining for spherical parts which are made with difficult-to-machine materials and used in aerospace,high-speed rail and other industrial fields,the machining principle and method for spherical parts are introduced briefly.Three traditio...

Chemical-mechanical grinding of K9 optical glass using atomized liquid

DAI Hengzhen, YOU Yanhong, DAI Zhihong, JIN Zhuji

2016, 36(4): 6-12. doi: 10.13394/j.cnki.jgszz.2016.4.0002

Abstract(446)

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Abstract:
According to the physical and chemical properties of K9 optical glass,based on the dry chemical-mechanical grinding(CMG),NaHCO₃ liquid is prepared using ultrasonic atomization to grind K9 optical glass.The optimal CeO₂ abrasives under the atomized environment are developed after grinding tests.In ad...

Research on sub-surface crack depth in surface grinding for optical glass K9 based on grinding speed

CHEN Jiang, ZHANG Feihu

2016, 36(4): 13-17. doi: 10.13394/j.cnki.jgszz.2016.4.0003

Abstract(431)

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Abstract:
According to the collaborative analysis of grinding parameters,the surface grinding experiment for optical glass is carried out based on the single factor of grinding speed while the abrasive paths are kept consistent.The damage depth of sub-surface crack layer is detected by specimen angle polishin...

Multi-objective genetic optimization on matrix structure of ultra-high speed grinding wheel

WANG Xuezhi, SUN Xue, SHI Ying, ZHAI Yanchun, YU Tianbiao, WANG Wanshan

2016, 36(4): 18-23. doi: 10.13394/j.cnki.jgszz.2016.4.0004

Abstract(411)

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Abstract:
In order to control expanding deformation in ultra-high speed grinding and reduce the rotation stress,the matrix of grinding wheel is optimized.Based on the analysis of cross section of the matrix,the parameterized model of grinding wheel matrix is established by straight line and spline curve and t...

Research on surface topography reconstruction and distribution of undeformed chip thickness of monolayer brazed CBN wheels

DING Chen, DING Wenfeng, DAI Chenwei, XU Jiuhua

2016, 36(4): 24-28. doi: 10.13394/j.cnki.jgszz.2016.4.0005

Abstract(421)

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Abstract:
In order to better understand the grinding mechanism and predict the grinding results for the further work,the actual distribution characteristics of undeformed chip thickness of monolayer brazed CBN wheel are investigated based on surface topography reconstruction.The results show that,grain height...

Effect of Cu-Ce alloy on property of Fe-based metal bond

CHEN Jinshen, ZHI Hongmei, FAN Xueqin, ZHAO Zhiwei

2016, 36(4): 29-33. doi: 10.13394/j.cnki.jgszz.2016.4.0006

Abstract(418)

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Abstract:
To further enhance the property of Fe-based metal bond,Cu-Ce alloy,Fe,Sn and Cu are used to prepare different types of metal bond by hot pressing,thus studying the effect of Cu-Ce alloy on property of the bond.The results show that density and impact strength of the bond increase as the content of C...

CFD simulation of diamond bit's bottomhole flow field

PAN Xiaoyi, QIN Jianxin, XIE Delong, LIN Feng, LUO Wenlai, XIAO Leyin, CHEN Chao, PENG Shaobo, CHEN Jiarong

2016, 36(4): 34-38. doi: 10.13394/j.cnki.jgszz.2016.4.0007

Abstract(482)

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Abstract:
Based on the theory of computational fluid dynamics(CFD),the bottomhole flow field of the ϕ75/ϕ49 mm diamond bits is simulated using the RNG k-ε model.Meanwhile,the effects of bottomhole pressure,flow velocity,shear strain and the eddy of water gap on the crown surface are analyzed.The diamond arran...

Effect of carbon dioxide on growth of diamond films

CHEN Yi, WANG Jianhua, LIU Fan, WENG Jun, WU Xiao

2016, 36(4): 39-43. doi: 10.13394/j.cnki.jgszz.2016.4.0008

Abstract(484)

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Abstract:
Diamond films are deposited on Si substrate with H₂/CH₄/CO₂ as source using microwave plasma chemical vapor deposition method.The effect of microwave power and CO₂ on the growth of diamond films is analyzed.The quality,surface morphology and grain orientation of diamond film are systematically chara...

Research on grinding temperature of particle-reinforced titanium matrix composites in creep-feed deep grinding

SHEN Long, DING Wenfeng, LI Zheng, XIAO Hong, WANG Xunyang

2016, 36(4): 44-48. doi: 10.13394/j.cnki.jgszz.2016.4.0009

Abstract(367)

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Abstract:
Particle-reinforced titanium matrix composites(PTMCs)have high specific strength,high hardness and high temperature durability,which shows great application potentials as an important structural material in aviation and aerospace industries.Creep-feed deep grinding experiments are carried out on par...

Optimizing diamond drill bit formula using uniform design

XU Qiang, LIU Yibo, XU Liang, YANG Zhiwei

2016, 36(4): 49-53. doi: 10.13394/j.cnki.jgszz.2016.4.0010

Abstract(476)

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Abstract:
The diamond bit matrix formulas are designed by uniform design with constraints to study the effects of diamond bit matrix formula on sharpness and life.Nonlinear regression analysis of experimental data is performed in SPSS to obtain the relationship between the performance and the component.At the...

Effect of power output on morphology of electroplating diamond wire

GAO Wei, CENG Jun, LI Hongyu, WANG Dongxue

2016, 36(4): 54-57. doi: 10.13394/j.cnki.jgszz.2016.4.0011

Abstract(500)

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Abstract:
The effect of power output form on the morphology of diamond wire is studied.In the experiment,ϕ0.18 mm copper plating high carbon steel wire is used as the baseline,while the size of diamond particle is 30-40 μm,surface of which has been chemically plated with nickel phosphorus alloy at weight incr...

Effect of sintering temperature on microstructure and property of CuZnSn13 powder sintered body

MIAO Jinqi, SUN Weiyun, HUO Fangfang, ZHAI Deming, LIU Shengxin

2016, 36(4): 58-62. doi: 10.13394/j.cnki.jgszz.2016.4.0012

Abstract(367)

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Abstract:
The copper-zinc-tin alloys with 13% tin(mass fraction)are produced using atomized prealloyed powders of copper-zinc-tin and mechanically mixed elemental powders of copper,zinc and tin at different hot pressing temperatures,respectively.The microstructures of sintered bodies are analyzed using scanni...

Study on shape of noise-reduction holes on diamond circular saw blade based on FEM/BEM

YU Jiawei, ZHANG Jinsheng, WANG Zhi, YE Luhao, GE Jianyu, GAO Lijun

2016, 36(4): 63-67,74. doi: 10.13394/j.cnki.jgszz.2016.4.0013

Abstract(425)

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Abstract:
To study the parameters of noise-reduction holes,ϕ960 mm diamond saw blades are selected as examples.Finite element method(FEM)and boundary element method(BEM)are used to analyze the vibration condition of the blades with different noise-reduction holes.The vibration response of FEM are used as the ...

Application status and development trend of nanodiamond in the field of functional materials

LI Min, LI Zhengxin, HUI Ming, HUANG Jihong

2016, 36(4): 68-74. doi: 10.13394/j.cnki.jgszz.2016.4.0014

Abstract(535)

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Abstract:
The characteristics,preparation methods and applications of nanodiamond are reviewed in this paper,focusing on the application in biomedical field.The prospect of nanodiamond is expected.

Influence of fixing agent on quality of brazed diamond tools

YANG Hedan, LIU Yibo

2016, 36(4): 75-78. doi: 10.13394/j.cnki.jgszz.2016.4.0015

Abstract(371)

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Abstract:
To study the influence of fixing agent on quality of brazed diamond tools,three agents namely SZ,NH and GY are made into testing samples.Their surfaces are observed and actual cutting & drilling experiments are implemented.Resultsshow that GY agent leaves least residual carbide with best appeara...

Experimental study on process of grinding Al₂O₃ ceramic with resin bond diamond grinding wheel

LIU Jie, CAO Jianfeng, SUN Zhengbin, LIU Meng

2016, 36(4): 79-83. doi: 10.13394/j.cnki.jgszz.2016.4.0016

Abstract(491)

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Abstract:
To enhance the grinding performance on Al₂O₃ ceramics,resin bond diamond grinding wheels are prepared to conduct grinding tests,the grain sizes of which are 125 to 150 μm and 38 to 45 μm respectively.Surface roughness,material removal mode and material removal proportion are studied as the grinding ...

Influence of distrbuting process on rotation strength of grinding wheel

WANG Xuetao, ZHANG Ziping, BIAN Huaying

2016, 36(4): 84-87. doi: 10.13394/j.cnki.jgszz.2016.4.0017

Abstract(459)

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Abstract:
According to the theory of maximum stress,the mechanism of ascending rotary strength derived from the increasing density of grinding wheel is analyzed.And the effects of following factors on the density of abrasives are discussed,such as the forming pressure,drying and sintering and the friction bet...

2016 Vol. 36, No. 4

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