金刚石与磨料磨具工程

Simulation study on high-speed grinding with single CBN grain

ZHANG Jingqiang, WANG Qi, GUO Jianye, WANG Yunjiang

2017, 37(4): 1-5. doi: 10.13394/j.cnki.jgszz.2017.4.0001

Abstract(527)

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Abstract:
In order to investigate the micromechanism of high/ultrahigh speed grinding process with single CBN grain, the mechanism of CBN abrasive grinding high-speed steel SHK-9under different process parameters was studied by using Lagrangian/Euler fluid-solid coupling method with random shaped CBN abrasive...

Influence of grit size and arranging distance on workpiece integrity when grinding CFRP with brazed diamond milling tool

YAN Chaoren, CHEN Yan, ZHENG Kai, LIANG Yuhong

2017, 37(4): 6-10,21. doi: 10.13394/j.cnki.jgszz.2017.4.0002

Abstract(722)

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Abstract:
The low interlaminar adhension and anisotropy of carbon fiber reinforced plastics (CFRP) could result in serious machining defects such as delamination, burrs, tearing, and other problems such as short tool life.On the idea of "grinding instead of cutting", delamination can be improved by using braz...

Diamond grits are ordely arranged through dispensing method thus improving bit performance

ZHANG Dingyuan

2017, 37(4): 11-14. doi: 10.13394/j.cnki.jgszz.2017.4.0003

Abstract(618)

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Abstract:
To orderly arrange diamond grits in impregnated diamond bits, dispensing is applied in preliminary experiments on arranging diamond grits.Matlab2016A image analysis tech provides a quantitative evaluation scheme of grit positioning accuracy.Then a single layer electroplated diamond bit with orderly ...

Discrete element simulation study on the friction and wear between matrix of diamond saw blade and marble

ZHANG Cong, TAN Yuanqiang, JIANG Shengqiang, GUO Hua

2017, 37(4): 15-21. doi: 10.13394/j.cnki.jgszz.2017.4.0004

Abstract(462)

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Abstract:
A discrete element model of friction and wear between diamond saw blade matrix and marble is established.The parameters of the matrix model are verified by indentation test, and the dynamic variation law of abrasion loss is simulated under different loads in the course of wear between the matrix and...

Diamond bit used in drilling reinforced concrete structure

YE Hongyu, YANG Zhan, TAN Songcheng, XIE Tao, ZOU Shengshu

2017, 37(4): 22-26. doi: 10.13394/j.cnki.jgszz.2017.4.0005

Abstract(530)

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Abstract:
Due to reinforce concrete's high strength grade and embedded rebar, it is difficult to obtain an efficient drilling result during the repair and renovation constructions.Besides diamond bit cutters are usually broken during the drilling process, thus leading to diamond bit's short service life.To so...

Study on key preparation technology of diamond core drill bit for sapphire

XU Liang, LIU Yibo, XU Qiang

2017, 37(4): 27-30,37. doi: 10.13394/j.cnki.jgszz.2017.4.0006

Abstract(602)

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Abstract:
Diamond core drill bit for sapphire is different from the conventional engineering drill bit, it requires good sharpness, long life, small radial jumping, good surface quality of sapphire bar, so the higher requirement is proposed for the preparation and testing of drill bit.This paper focuses on th...

Preparation technology and properties of Ni-diamond composite coating

XU Yang, SUN Yuli, TANG Suyang, ZUO Dunwen, YAN Xiaotong

2017, 37(4): 31-37. doi: 10.13394/j.cnki.jgszz.2017.4.0007

Abstract(576)

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Abstract:
In order to study the composite electrodeposition process of diamond consolidated abrasive grinding discs, the preparation technology and properties of Ni-diamond composite coating are studied in this paper.The influences of diamond concentration, current density, temperature and deposition time on ...

Study on mechanical properties of diamond wire saw under ultrasonic tension

ZHANG Liaoyuan, SU Junjin, LIU Xiaodong, GUAN Huiyu, LIU Wei

2017, 37(4): 38-43. doi: 10.13394/j.cnki.jgszz.2017.4.0008

Abstract(683)

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Abstract:
Mechanical properties of diamond wire saw under the action of ultrasonic vibration were studied.The vibration system and connection device were self-designed, and the uniaxial tensile tests were carried out for different diameters of diamond wire saw by use of the ultrasonic vibration system in an a...

Diamond particle content of Cu-diamond composite coating

GAO Long, LIU Jituo, YAN Zepeng, ZHANG Yingjiu

2017, 37(4): 44-47. doi: 10.13394/j.cnki.jgszz.2017.4.0009

Abstract(671)

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Abstract:
Diamond particle content is the key to the performance of diamond composite coating.Selecting different volume fractions of alkyl bromide as the additives, we studied the effect of additive volume fraction on the composite amount of diamond particles and selected the optimum fraction of the addictiv...

Application of spray welding technology in steel body PDC bit's surface hardening

XU Jianfei, ZOU Deyong

2017, 37(4): 48-52. doi: 10.13394/j.cnki.jgszz.2017.4.0010

Abstract(580)

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Abstract:
In order to solve the problems of steel body PDC bit, including the lower hardness, poor wear resistance, poor drilling fluid erosion ability of the bit's body, the preferred mothod for steel body PDC bit surface hardening and preferred material for surface cladding were obtained by means of theoret...

Application of fine powder in metal bonded grinding wheels

LI Guowei, HAN Xin, WANG Dongdong, NIU Junkai

2017, 37(4): 53-55,61. doi: 10.13394/j.cnki.jgszz.2017.4.0011

Abstract(550)

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Abstract:
In order to explore the effect of fine powder on the performance of metal bonded grinding wheel, the fine powder and ordinary powder with different ratios were mixed homogeneously and were made into matrix body-blocks by hot pressure sintering method.Moreover, superabrasive were added to the above m...

Application of acoustic emission in the breaking signal recognition of grinding wheel rotation test

WANG Yongfeng, ZHENG Peng, LIU Hongjun, CHEN Xiaoqiang, WANG Jiangtao

2017, 37(4): 56-61. doi: 10.13394/j.cnki.jgszz.2017.4.0012

Abstract(526)

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Abstract:
Acoustic emission (AE) technology, a new method to detect the breaking signal of grinding wheel rotation test is introduced.The time and frequency domain of the signals are studied by collecting the AE signals of background, idling, no-load, loading.Comparison the characteristic AE signals of grindi...

Experimental study on surface topography and tensile ultimate load of diamond wire saw during life cycle in machining sapphire

NI Yongming, LI Zhen, LI Guohe

2017, 37(4): 62-66. doi: 10.13394/j.cnki.jgszz.2017.4.0013

Abstract(584)

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Abstract:
In order to optimize the process parameters for slicing sapphire wafer through multi-wire sawing with diamond wire saw, the diamond wire samples of the different stages are obtained by machining tests.The surface morphology of these samples are observed through scanning electron microscopy, while th...

Application progress on the vacuum plating of nanodiamond and related materials

ZHANG Yan, ZANG Jianbing, XU Hanqing, HAN Chan, CHEN Libei, WANG Yanhui

2017, 37(4): 67-72. doi: 10.13394/j.cnki.jgszz.2017.4.0014

Abstract(585)

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Abstract:
It is over reviewed that nano diamond, nano silicon carbide, silicon nitride whisker and carbon nanotubes were surface modified with titanium or manganese metal power by using vacuum plating method and applied in new energy.Especially, the titanium coated nanodiamond, nano silicon carbide and silico...

Research and development of cutting or grinding specific energy database system for key components of typical machine tools

YIN Hui, DENG Chaohui, ZHANG Hua, FU Yahui, YAN Can

2017, 37(4): 73-78,85. doi: 10.13394/j.cnki.jgszz.2017.4.0015

Abstract(566)

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Abstract:
Based on the existing energy consumption research, and according to the empirical relation between the material removal power and the no-load power and machining power of the machine tools, an empirical calculation model for cutting or grinding specific energy is established.The feasibility and corr...

Progress and application of non-woven polishing materials

ZHAO Shuo, ZOU Wenjun, PENG Jin, SONG Xudong

2017, 37(4): 79-85. doi: 10.13394/j.cnki.jgszz.2017.4.0016

Abstract(600)

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Abstract:
The research status and preparation methods of non-woven polishing materials are introduced.The advantages and disadvantages of various preparation methods are analyzed.Then, the effects of fiber type, binder type, abrasive type and processing parameters on material properties and processing quality...

Improvement of sintering press performance using newly electro-hydraulic control system of servo pump

HAN Ruifeng, YANG Xiaopeng, ZHAO Zhipu, LI Haishen, HU Bingtao

2017, 37(4): 86-89. doi: 10.13394/j.cnki.jgszz.2017.4.0017

Abstract(418)

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Abstract:
According to detailed analyses of principles of the servo pump system and electric control and PLC (programmable logic controller) servo motor control, the existing sintering press is improved by using the servo pump system to replace the control system of the electro-hydraulic proportional value.Af...

2017 Vol. 37, No. 4

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