The detailed description of the cutting piece from xuzengbin's blog

 

 

 

 

 

A cutting piece is a tool for grinding, grinding and polishing. Most of the fiber cutting disc Chinese supplier are artificial cutting pieces made of the abrasive plus binder, and natural cutting pieces directly processed from natural ore. In addition to being widely used in machinery manufacturing and other metal processing industries, cutting sheets are also used in the processing of food processing, the paper industry, and non-metallic materials such as ceramics, glass, stone, plastics, rubber, and wood. During the use of the cutting piece, when the abrasive grains are blunt, the abrasive grains are partially or completely detached from the cutting piece due to partial fragmentation of the abrasive particles or the breaking of the bonding agent, and the new cutting edge has continuously appeared on the abrasive surface of the cutting piece. The mouth, or constantly revealing new sharp abrasive particles, so that the cutting piece can maintain cutting performance for a certain period of time. This is the self-sharpness of the cutting piece. This self-sharpness of the cutting piece is a feature that the cutting piece is more prominent than a general tool. The cutting piece is divided into two types according to its raw material source: natural cutting piece and artificial cutting piece. Naturally-cut pieces commonly used in the machinery industry are the only oilstone. The artificial cutting pieces are distinguished according to the basic shape and structural features, and there are five types of grinding wheels, grinding heads, oil stones, and tiles (collectively referred to as consolidated cutting sheets) and coated cutting sheets. In addition, it is customary to classify abrasives as a type of dicing sheet. Consolidated cutting sheets can be divided into ordinary abrasive consolidated cutting sheets and super-hard abrasive consolidated cutting sheets according to the abrasive used. The former uses ordinary abrasives such as corundum and silicon carbide, and the latter is made of superabrasives such as diamond and cubic boron nitride. In addition, there are some special varieties, such as sintered corundum cutting sheets. A common abrasive-consolidated cutting piece is a cutting piece in which a general abrasive is consolidated into a shape by a bonding agent and has a certain strength. Generally composed of abrasives, binders, and pores, these three parts are often referred to as the three elements of consolidated cutting sheets. The abrasive acts as a cutting in the cutting blade. The binder is a material that consolidates loose abrasive into a cutting piece, both inorganic and organic. Inorganic binders include ceramics, rhododendron, and sodium silicate; organic resins, rubber, and shellac. The most commonly used are ceramic, resin and rubber binders. The air hole acts as a chip and chip on the wear debris during grinding and can accommodate the coolant to help dissipate the heat. In order to meet certain special processing requirements, some fillers such as sulfur and paraffin may be impregnated in the pores to improve the performance of the cutting sheet. This filler, also known as the fourth element of the dicing sheet. Items that represent the characteristics of a conventional abrasive-consolidated cutting blade are shape, size abrasive, particle size, hardness, texture, and bonding agent. The hardness of the cutting piece refers to the difficulty of the abrasive grain falling off the surface of the cutting piece under the action of external force, and it reflects the strength of the bonding agent holding the abrasive grain. The hardness of the dicing sheet mainly depends on the amount of the binder added and the density of the dicing sheet. The easy detachment of the abrasive grains indicates that the hardness of the dicing sheet is low; otherwise, the hardness is high. The hardness grades are generally divided into seven levels: super soft, soft, medium soft, medium, medium hard, hard and super hard. From these levels, several small levels can be subdivided. The method for determining the hardness of the dicing sheet is more commonly used by a hand cone method, a mechanical cone method, a Rockwell hardness tester method, and a sandblast hardness tester. The hardness of the dicing sheet has a corresponding relationship with its dynamic elastic modulus, which is advantageous for determining the hardness of the dicing sheet by measuring the dynamic elastic modulus of the dicing sheet by an audio method. In the grinding process, if the material of the workpiece to be ground is high in hardness, a cutting piece having a low hardness is generally used; and conversely, a cutting piece having a high hardness is used. The cutting piece tissue is roughly classified into three types: compact, medium, and loose. Each class can be subdivided, etc., and is distinguished by the organization number. The larger the dicing sheet number, the smaller the volume fraction of the abrasive in the dicing sheet, and the wider the gap between the abrasive grains, indicating that the tissue is looser. Conversely, a smaller organization number indicates a tighter organization. The flat abrasive cutting disc of the looser structure is not easily passivated when used, and the heat is less during the grinding process, and the heat deformation and burn of the workpiece can be reduced. The abrasive grains of the tighter tissue are not easily peeled off, which is advantageous for maintaining the geometry of the cutting piece. The organization of the dicing sheet is controlled only by the dicing sheet formulation at the time of manufacture and is generally not measured. The superabrasive bonded cutting piece is mainly a cutting piece which is consolidated with a bonding agent such as diamond or cubic boron nitride. Due to the high price of a diamond and cubic boron nitride and good wear resistance, the consolidated cutting sheets made by them are different from the ordinary abrasive consolidated cutting sheets. In addition to the super abrasive layer, there are transition layers and substrates. The super abrasive layer is part of the cutting action and consists of a superabrasive and a binder. The substrate is supported by grinding and consists of materials such as metal, bakelite or ceramic. The transition layer is used to join the matrix and the super abrasive layer, consisting of a bonding agent, and sometimes it can be omitted. Commonly used binders are resins, metals, electroplated metals, and ceramics.


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