Abrasive wheels Using new materials to replace fired ceramic abrasive quartz sand for sand pad

Using new materials to replace fired ceramic abrasive quartz sand for sand cushion, improve the labor environment is an urgent need to resolve the issue. In this paper, resulting in a ceramic abrasive plant root cause silicosis - quartz sand mats were analyzed, through access to a lot of relevant information on the physical and chemical properties of certain materials were tested, and test fired ceramic abrasive mounted.  abrasive grinding  efforts, finally found a promising replace quartz sand mat new material. The main research work and test results of an overview of the relevant aspects of the quartz crystal structure of theoretical knowledge. It can be seen, the quartz crystal having a complex multi-resistance. Quartz sand in ceramic  polycrystalline diamond  and cooling process, due to changes in polycrystalline quartz occur when inevitably accompanied by changes in the volume, the resulting stresses and cracks, making their strength reduced from large particles into small particles even powder.

Diamond blade Semi-fixed abrasive grains with large particles and rigid "trap" effect, the machined surface can be prevented from being scratched large particles

In order to alleviate this contradiction, ultra-precision Research Center, Zhejiang University of  polycrystalline diamond  a semi-fixed abrasive grinding processing technology, which is a new type of abrasive, has good processing properties, can effectively solve the problem of the machined surface damage, both processing efficiency and processing quality, efficient precision machining, semi-fixed abrasive synthetic diamond  fixing the abrasive machining abrasive machining and were free to integrate the advantages. In addition, semi-fixed abrasive grinding of large particles have a hard "trap" effect, to prevent large particles of the machined surface is scratched, the paper mainly semi-fixed abrasive grinding "trap" effect of doing in-depth discussion. In the article the use of discrete element modeling semi-fixed abrasive grinding "trap" effect, in the simulation process, both sides of the wall instead of using discrete element generated conical large particles, due to the semi-fixed combination of abrasive grit overall agent is weak, the simulation process into large particles can be abrasive in slowly.

Engineering ceramics are brittle and difficult to machine materials, using traditional processing methods

Engineering Ceramics less susceptible to oxidation, corrosion resistant, high temperature and abrasion and excellent performance. With the development of processing technology, it has the possibility of substitution of other materials, but is also brittle engineering ceramics materials difficult to machine using conventional  synthetic diamond , to high processing costs, low processing efficiency, the processing quality is not satisfactory, and there are special shape processing requirements of the product is difficult to accomplish, limiting its range of applications. For  cutting tools , the abrasive water jet (AWJ) processing is cost-effective non-traditional processing techniques, it is not thermal, electrical, and chemical reaction process, the workpiece does not produce metallurgical, chemical or physical properties changes.

Abrasive jet is mixed with the fluid medium hard particles high pressure water jet

The oil is cleaned using sandblasting tubing with paint, but a lot of cleaning surface pitting, efficiency is not high. Abrasive Water Jet is a new development of a new type of high efficient jet,  Diamond blade  in many industries has been applied. In the UK, it is now generally believed that the metal surface treatment abrasive jet is the most appropriate method. The so-called fluid medium abrasive jet is hard particles are  synthetic diamond  water jet. After mixed abrasive jet is mixed with the appropriate concentration of abrasive slurry (such as quartz mortar body) delivered to the nozzle mixing chamber is injected into the mixing chamber high  abrasive grinding  jet acceleration, and went into the mixing tube, in mixing tube to obtain high-energy abrasive particles like high-velocity bullets sprayed into the work piece as inner and outer surfaces, the surface of the paint, rust, oil, etc. quickly clean up.

Radius horizontal well drilling technology by high-pressure water jet rock breaking

Into the nineties , the use of high technology to enhance the development of low permeability reservoirs and oil fields for enhanced oil recovery is to improve economic efficiency , ensure the stable development of an important measure. Radius horizontal well  synthetic diamond  by high-pressure water jet rock breaking , in the production of multi- layer direct drilled horizontal wells mouth radial distribution network , to achieve efficient development of low permeability reservoirs , the transformation of the old oil fields and enhanced oil recovery purposes,  polycrystalline diamond  in eastern China has good application prospects and strong vitality. The results from the preliminary study and field test situation, the use of rotating water jet in relatively soft formations or light oil in drilling, hole diameter of 80 ~ 110mm, to meet the requirements of oil and gas production , and have in depth about 1000m oil well drilled in  synthetic diamond powder  . However, if the radius horizontal well technology successfully applied even deeper reservoir depth of 2000m or harder formations , it is necessary to improve the jet rock breaking . Therefore, the purpose of utilization of abrasive water jet and rotary jet advantages and overcome their shortcomings , by experiment , researchers not only rock breaking ability, high drilling speed , but also has characteristics of drilling large diameter holes rotating abrasive jet . Abrasive Water Jet refers jet artificially added solid abrasive particles jet .

In confining pressure conditions, due to the simple jet or abrasive jet cavitation erosion crushing capacity increases with confining pressure decreases rapidly

If the energy of the jet can be fully utilized, then the erosion crushing capacity will further increase operational effectiveness will be greatly enhanced. In addition, with the development and utilization of marine resources accelerates, the deepwater drilling become an important direction of development at home and abroad, deep  grinding wheel  technology more  polycrystalline diamond  and attention. In confining pressure conditions, due to the simple jet or abrasive jet cavitation erosion  synthetic diamond  increases with confining pressure decreases rapidly, so the abrasive water jet cutting capacity to be improved. , Proposed the use of BP neural network to predict the depth of abrasive jet perforating rock breaking new method. By comparing the predicted values ​​with the experimental findings, the prediction accuracy of the method fully meet the engineering requirements for on-site applications provide theoretical support.

Complex non-linear relationship, the corresponding mathematical model is very difficult

Abrasive water jet perforation is a production by injection of technical measures is mainly used for low-yielding permeability, old wells, and other carbonate rocks cemented dense formations tip hole processing in order to improve the ability to penetrate the near wellbore, thereby to increase production by injection purposes. Since the nozzle diameter perforation depth, nozzle pressure drop, abrasive concentration, perforation time, displacement and lithology, and many other arguments,  synthetic diamond powder  is a complex nonlinear relationship, the corresponding mathematical model is very difficult. Artificial neural networks have the topological  synthetic diamond  a high degree of dynamic systems in parallel, it can be applied to effect the input state to obtain information output by the processing unit and a network to the connected components. Artificial  abrasive grinding  are the most widely error back propagation neural network, namely BP neural network, it has a powerful complex nonlinear function mapping capability. BP neural network technology used in the modeling of rock breaking perforation depth.