MRF polishing technology is the use of a magnetorheological fluid rheology

Abrasive magnetic fluid in the case of an external magnetic field without the performance of a general fluid state, has a good fluidity, and once it is applied to the external magnetic field will rapidly increase the viscosity, exhibit solid-like properties, which is a liquid abrasive magnetic rheology. Currently MRF polishing  synthetic diamond powder  the use of a magneto-rheological fluid rheology, but the technology is also limited to optical lenses, ceramics, glass and some other non-metallic materials, parts of the surface grinding. This thesis is in the full use of  Abrasive grinding  abrasive fluid rheology basis, in order to achieve the metallic materials, especially  Diamond blade  parts of the surface finishing, while presenting a liquid magnetic abrasive finishing technologies. By analyzing the composition of liquid and characteristics of magnetic abrasive, abrasive magnetic fluid obtained finishing machining technique works.

Abrasive is to combine a boehmite, aluminum hydroxide and magnesium nitrate combined with the product

Abrasives grown in an aqueous gel abrasive abrasive technology has been considered a big step forward. Ministry of Industry abrasive early in the 1980s began using sol-gel processing method to generate an abrasive. Mineral technology manager explained, The abrasive is to combine a boehmite, aluminum hydroxide and magnesium nitrate  polycrystalline diamond  product. Magnesium nitrate is used as a modifier. These gel generated on the liquid taken out, allowed the formation of massive precipitate. then it is crushed into a desired size. And finally into the furnace calcination. This has been improved, like the very dense ceramic corundum abrasive as new. The sol-gel method of the production of  synthetic diamond  corundum normal  abrasive grinding  compared to the advantages of a gel abrasive after calcination in the broken, thus eliminating the micro-cracks. Abrasive micro-cracks on the grinding pressure, causing premature wear of the main factors abrasive.

Abrasive abrasive bending theory and design

Consider the workpiece from the initial processing to the sphere in the process of removal of the paraboloid and to establish the mathematical model and the ideal state derived abrasive density trend. Bending theory expounded abrasive and grinding tools, design,  abrasive wheels  of the abrasive abrasive on uneven density distribution method. The use of such  abrasive grinding  density abrasive grinding test results are analyzed and the theoretical calculation of worn grinding parabolic  synthetic diamond , the same as the general conditions using abrasive uniform density results, the conclusion is : the calculated density abrasive trend is positive, and the use of production based on this theory for parabolic speed grinding abrasive, abrasive wear can reduce the degree of unevenness, reducing the number of abrasive trimming.

Abrasive water jet theory and research status, proposed hydraulic squeeze-type abrasive water jet system model

Engineered and tested hydraulic squeeze-type abrasive water jet equipment prototypes. Come up with a site can be used for disaster relief, and penetration, crushing various materials (such as steel, steel, concrete, rock, etc.) hydraulic squeeze-type abrasive water jet way and equipment. This paper discusses the abrasive water jet  abrasive grinding  theoretical and research status, proposed hydraulic squeeze-type abrasive water jet system model, and use the theory of transient flow system is analyzed. Hydraulic squeeze-type abrasive waterjet system uses a small horizontal  lycrystalline diamond  abrasive chamber confining pressure from environmental media on the resistance caused by the jet. Environmental conditions at high confining pressure dynamic pressure under the jet axis apparent than in the non-confining pressure decay much faster;

Electrophoresis deposition of diamond coating sol charged ions in the applied electric field

Studied by electrophoresis on a silicon tip arrays powder layer deposited on the surface of diamond emblem made ​​of gold mesh Shinoda large area field emission arrays stone field emission characteristics . electrophoresis deposition diamond coating sol charged ions under the action of an abrasive grinding field, along with its electrodes of opposite polarity charge on the migration direction, a phenomenon known as cutting tools electrophoresis solution preparation: in deionized water, one drop of weak acid, the PH value of the solution was about 5. then, put Kim Assistant abrasive wheels , particle size of about 0.25 emblem meters and with it his power ultrasound solution mixing, preparation of a good electrophoretic fluid is milky white. electrophoresis process: anode electrophoresis electrophoresis pieces to be coated silicon tip arrays, materials an N-type, a sharp density of 25.

Material surface treatment in many ways, but its essence is substantially the same, all by changing the organizational structure of the surface material

Surface modification of metallic materials There are many ways , more traditional methods such as carburizing, carbonitriding , ion precipitation penetration, thermal spray technology , electroless plating technology, laser surface modification technology, although the material surface treatment in many ways, but is substantially the same, are the surface by changing the material structure in order to achieve the requirements . Briefly , chemical treatment processes are basically the chemical reaction medium , the diffusion boundary layer , surface adsorption and diffusion  Abrasive grinding  reaction and the process of four separate sub- component , but four processes associated with each other , each constraints are indispensable. Although these techniques mentioned above have many advantages, already in production and daily life have been widely used , and has achieved great results , but there are also  synthetic diamond  or penetration effect confined near the surface and other issues , the effect can not reach certain technical  Diamond blade . Such as the use of thermal spray technology to change the surface properties of materials , although the technology has a variety of base material for spraying , the cost is relatively low , significant economic benefits , etc., but there are also coated impact resistance and corrosion resistance is not high, the spraying process on the environment and harmful to the operator and other shortcomings . Another example carburizing treatment , although simple process, but relatively shallow depth of penetration , and thus in the actual production has significant limitations.

With the decoration industry continues to develop, on the shape and size of stone products have become increasingly demanding

With the decoration industry continues to develop, on the shape and size of stone products have become increasingly demanding. A large number of CNC and automated processing  polycrystalline diamond  stone processing industry, decorative stone processing technology is generally divided into:  abrasive grinding  - coarse - fine grinding - grinding. Among them, the fine grinding and fine grinding stone restricting processing efficiency and accuracy of the main factors that also affect the CNC machine tools in the stone  Diamond blade  the main reason for the popularity. Therefore, the study grinding process has very important significance. Introduce a lot of information about Granite Grinding Mechanism, little about the actual production of grinding process.

Class of non-circular gear design and manufacturing is no longer a bottleneck in the application

Non-circular gear transmission mechanism can achieve variable ratio transmission, suitable for printing, textile, agricultural machinery, instrumentation and other areas where a non-uniform motion, but because of its pitch curve and the computational complexity of the tooth profile design, 3D modeling and processing difficulties,  Synthetic diamond  been universal. In recent years, with CAD / CAM and CNC machining technology, the rapid development of non-circular gear design and processing class is no longer a bottleneck in the application, its advantages increasingly being played.  Abrasive grinding  non-circular gear mechanism is an eccentric cylindrical gear and its conjugate composed of a non-circular gear, the agency using the eccentric gear outside conjugated non-circular gears meshing to achieve non-uniform  Diamond blade , select the appropriate amount of eccentricity and center distance to form the desired non-uniform transmission ratio and angle relationship. The reason capstan eccentric gear, the eccentric gear may be used because the general manufacturing method, the processing is easy, and low cost. Many scholars of non-circular gear is designed to do the research on computer-aided design of oval gear research on non-circular gear pitch curve design theory has been studied;

Gear is an important quality indicators

Conjugate tooth profile of the slip rate is the relative sliding of two arc tooth profile and the tooth profile over the limit of the ratio of arc length. Slip ratio is larger, more serious tooth wear, friction loss also, it is an important quality gear indicator. Sliding engagement means zero rate of pure rolling between the tooth surface, it would reduce the friction between the teeth and wear. Engagement means such slip rate constant under the conditions of a pressure of the tooth profile of polycrystalline diamond , good tooth. In this paper, a rack meshing tool for the media on the plane of zero slip sliding engagement drive and wait for the theoretical derivation. The proposed: parameters via a toothed rack cutter  abrasive grinding of a sliding catch rates of tooth profile, two drawn flat rigid sliding engagement zero does not exist in the conclusions of the tooth profile, three other proposed slip rate of the presence of tooth profile vehicles range. Discussion only symmetrical tooth rack tooth profile conjugate tooth profile, because only this tooth profile greater practical significance.

Comparing different pilot hole diameter two-stage PDC bit bottom-hole stress field, preferably a pilot hole diameter

Downhole drilling process and after the formation of the bottom three states stress field, the preparation of the finite cubic boron nitride program. The analysis has been a series of downhole drill stress field. Contrast double-stage conventional PDC bits PDC bits and downhole stress field studies to improve its mechanical mechanism ROP. abrasive wheels  the different pilot hole diameter two-stage PDC bit bottom-hole stress field, preferably a pilot hole diameter. ② application of non-Newtonian  abrasive grinding , drill string and drill bit hydraulics hydraulics theory deduced two-stage flow distribution system of equations and parameters affecting the simplified formula, prepared a two-stage flow distribution and nozzle combination design process.

Theory and engineering practice raised a lot about the state of motion in the underground drillstring different assumptions

For decades, research drillstring mechanics and foreign scholars based on different research objectives and methods, theory and engineering practice raised a lot about the state of motion in the underground drillstring different assumptions, of guiding  Diamond blade  for the engineering  abrasive grinding  so drillstring dynamics theory developed rapidly, but most force on the drill string and drill string movement's findings are based on theoretical analysis,cubic boron nitride and other methods come. In actual drilling equipment using existing data measured in the field with a certain one-sidedness, up from the economic considerations quite feasible.

PDC impact resistance test methods are mainly heavy weights and pendulum impact shocks France France

During drilling , the drill hole wall and the friction generated between large , uneven bottom of the hole and the residual friction rock flour and other comprehensive factors make the PDC bit additional force by uncertainty , seriously affect the use effect of the use of PDC life. Determine the effect of using PDC PDC diamond layer involves not only the strength , PDC large extent the impact resistance of diamond and  ynthetic diamond  by bonding strength between the direct effects . In use , when the PDC diamond layer shedding occurs , the entire drill will be damaged . Therefore, in order to improve the bonding strength of PDC interface , designed with a variety of interfaces , plane connection PDC PDC  polycrystalline diamond methods of performance testing method and the heavy weights of the impact pendulum impact method , commonly used for the heavy weights of impact method . The business impact resistance test according to the production  Abrasive grinding , the quality of the heavy Tuo , distances to the impact . This paper mainly uses tilting heavy impact energy analyzer Tuo France PDC impact toughness test , explore and study the impact of different interface structure on PDC performance, and through analysis of polycrystalline diamond layer fracture macroscopic morphology investigate the impact of PDC failure mechanism .

When the PDC diamond layer shedding occurs, the entire drill will be damaged

During drilling , the drill hole wall and the friction generated between large , uneven bottom of the hole and the residual friction rock flour and other comprehensive factors make the PDC bit additional force by uncertainty , seriously affect the use effect of the use of PDC life. Determine the effect of using PDC PDC diamond layer involves not only the strength , PDC large extent the impact resistance of  synthetic diamond  substrate by bonding strength between the direct effects . In use , when the PDC diamond layer shedding occurs , the entire drill will be damaged . Therefore, in order to improve the bonding strength of PDC interface , designed with a variety of interfaces , plane connection PDC PDC impact current methods of performance testing method and the heavy weights of the impact abrasive grinding  method , commonly used for the heavy weights of impact method . The business impact resistance test according to the production characteristics, the quality of the heavy Tuo , distances to the impact . This paper mainly uses tilting heavy impact energy analyzer Tuo France PDC impact toughness test , explore and study the impact of different interface structure on PDC performance, and through analysis of polycrystalline diamond layer fracture macroscopic morphology investigate the impact of PDC failure mechanism .

Using mathematical statistical method to analyze the PDC cutter force

Coring drill bit is drilling formations, a key tool for core, coring drill merits of the quality will directly affect the quality of coring, core harvest rates and operating costs. Domestic PDC coring drill technology status compared with foreign advanced level there is a big gap, in addition to cutting the material quality of the objective reasons, the lack of scientific design theory and method is a very  abrasive grinding . This article from the PDC cutter force test to start, using mathematical statistical method to analyze the PDC cutter force and lithology, caster angle, the cutting area and the arc length of the relationship, the establishment of PDC coring bit downhole force model; while the PDC coring bit profile  polycrystalline diamond , cloth tooth design methods, downhole flow field analysis methods were studied and discussed; on this basis, in order to force the formation of a  synthetic diamond  for the center to take anti-vortex PDC core bit design methods. Developed three new PDC coring bit in field trials and achieved good results, and its faster core drilling, core harvest rate of 95% or more, has been widely promoted, to obtain a better economic and social benefits.

PDCA cycle consists of four phases

Also known as the Deming Cycle PDCA cycle, is an American quality control expert Deming first proposed, initially for total quality management. PDCA cycle consists of four phases: planning (Plan), execute (Do), check (Check), processing (Act); eight steps: analyze the situation to identify problems, analyze various factors, identify the key factors to  abrasive grinding  , planning, implementation of the action plan to develop, test results, standardization, the legacy of a PDCA cycle to the next question. PDCA cycle can make our way of thinking and working procedures  synthetic diamond powder , systematic, and scientific image, its features are three: Quality management at all levels have a PDCA cycle, the formation of a set of  synthetic diamond , a buckle a ring, mutual restraint, complementary organic whole. In the PDCA cycle, the general said, on a cyclic basis for the next one cycle, the next cycle is a cycle on an implementation and concrete. PDCA cycle as the basic methods of quality management, not only for the whole project, but also to adapt to the entire enterprise and corporate departments, section, team and individuals.

After determining a iff each city once the shortest route

TSP is given n cities and distances between cities, each city asked to identify a pass if and only if one of the shortest route. It is a typical combinatorial optimization problem, and its consideration of the optimal solution is exponential. polycrystalline diamond  TSP problem is a NP-hard problem. Based on intelligent optimization algorithm for TSP, is  Diamond blade  hot topic in recent years. However, in the scientific management and economic decision-making in many application areas, there are lots of real-world multi-objective optimization problem. For the traveling salesman problem, in practice often taking multiple targets, such as the shortest distance, shortest and most economical cost,  Abrasive grinding , and many other factors. Often exist between conflicting objectives. How to find multiple targets in a fair and reasonable solution is a more complex problem. This paper focuses on multi-objective genetic algorithm for solving TSP problems were studied.

Dynamic multi-objective TSP from mobile computing, mobile communications and other applications proposed a new class of

In the scientific management and economic decision-making in many application areas, there are lots of real-world dynamic multi-objective optimization problem. For the traveling salesman problem (Traveling Salesman Problem, TSP), in practice often taking multiple targets, such as the shortest distance, shortest and most economical cost,  synthetic diamond , and many other factors. Often exist between conflicting objectives. How to find multiple targets in a fair and reasonable solution is a more complex problem. In addition, in real life, a large number of multi-objective optimization problem with real-time, the question of the state change over time. These optimization problems in addition to the nature of multiple targets, but also dynamic. Dynamic  Diamond blade  TSP from mobile computing, mobile  abrasive grinding other applications proposed a new class of Np-hard mathematical model, it belongs to one of the latest evolutionary computation field of study. Dynamic multi-objective TSP and TSP is a dynamic combination of multi-objective TSP, as space communications (ground-, air-and space-based communication between each other) a mathematical model in 2004 for the first time put forward. With the classic TSP, static multi-objective TSP, dynamic single objective TSP compared to more complex dynamic multi-objective TSP, with greater challenge.

In a static environment, or dynamic environment can be a good solution for TSP problem

TSP (Traveling Salesman Problem) problem, also known traveling salesman problem, traveling salesman problem, is seen in the many applications of a combinatorial optimization problem. This problem can be simply described as: given a weighted graph G, requires a weighted graph G the right to find a cumulative minimum Ham ilton loop. If the TSP problem between the nodes involved in weight, the number of nodes varies over time, can be called dynamic TSP. Dynamic TSP problem can be widely used in  Abrasive grinding , routing, robot control, vehicle routing, mobile computing and other fields. Author based on dynamic characteristics and requirements of the TSP, the 2-OPT algorithm,3-OPT algorithm and genetic algorithm combine to design and implement a solution to the problem of dynamic TSP algorithm. Through the experiment, the algorithm is proved in a static environment, or  Abrasive grinding wheel  can be a good solution for the TSP problem, and high efficiency. Dynamic characteristics and requirements of the TSP TSP problem with dynamic TSP problems are closely linked, and has its own characteristics. Dynamic TSP problems often have the following characteristics and requirements: ① real time. Dynamic TSP problem is changing, costs between nodes, number of nodes varies over time.

In order to give decision alternatives, the algorithm must give a satisfactory solution in a relatively short period of time

The TSP (Traveling Salesman Problem, TSP) is a typical combinatorial optimization problem, has become and will continue to be testing the new algorithm hotspot combinatorial optimization problems. In the traditional TSP problem, the city's size and the distance between cities is fixed, but in practice, the size and cost of the problem is often the vector matrix dynamic changes over time, saying such issues as dynamic TSP. In order to give managers the right decision scheme, the algorithm must be based on real-time information in a relatively short period of time given satisfactory solution. Research on such issues, not only for all types of dynamic  cubic boron nitride  optimization  synthetic diamond  a theoretical reference, but also has a wide range of practical value. As an adaptive genetic algorithm for global optimization probabilistic search algorithm, with simple and universal, robust and strong,  Abrasive grinding  and parallelism, etc., has been successfully applied to solve combinatorial optimization problems. In this paper, an improved genetic algorithm to solve TSP problems, the main research work and innovation on the TSP problems were analyzed to establish a mathematical model.

System Functional Materials Synthesis and Characterization of exploratory work done in the field

From the DC arc plasma under the action of boron nitride phase transition, under extreme conditions, the synthesis of carbon-based porous materials, high temperature and high pressure synthesis CN phase material characterization and high pressure in situ synchrotron radiation X-ray diffraction studies of three aspects introduced in BCN System functional Materials Synthesis and Characterization of exploratory work done in the field. First reported in less than one standard atmospheric conditions of high temperature plasmas hexagonal boron nitride to cubic boron nitride phase transition model proposed chemical vapor transport  Abrasive grinding  and kinetics of phase transformation mechanisms were discussed semiquantitative . In the DC arc plasma were prepared porous carbon-based materials, its crystalline structure, morphology and surface-active functional groups a complete Polycrystalline diamond of the microstructure explained and surface functional groups of the formation mechanism. High pressure in the synthesis of a CN material characterization of a variety of means to determine the graphite phase quadrature C3N4 CN phase and a possible presence in this study based on the two phase behavior under high pressure, fitted two-phase isothermal equation of state.