As an excellent alloy material, cemented carbide has a very important position in the field of industrial manufacturing, known as "industrial teeth". Cemented carbide is indispensable for the production of turning tools, drill bits, boring tools and other tool materials, as well as the processing of high manganese steel, stainless steel, heat-resistant steel and other materials. How is cemented carbide applied in practice? Today, mainly takes you to understand the types and choices of cemented carbide bits. There are mainly three kinds of cemented carbide bits: integral cemented carbide bit, cemented carbide indexable blade bit and replaceable head cemented carbide bit. Among them, the integral cemented carbide has a wide variety, has centering function, can be reused and can control the processing cost. The carbide indexable blade has the advantages of complete types of bits, convenient tool change and no centering function. Replaceable cemented carbide bits also have centering function, complete types, high machining accuracy and efficiency, and the cutter head can also be reground. Although cemented carbide has the advantages of wear resistance, corrosion resistance and high hardness, when the cemented carbide bit is drilling, the workpiece torque is large, and the thermal expansion and cold contraction phenomenon is easy to cause the bit to break in the hole. What should we pay attention to when using cemented carbide bits to avoid this situation? 1. When the strength of the bit is acceptable, reduce the width of the transverse edge to avoid the loss of the bit by axial force. 2. Different drill bits and cutting speeds should be selected for different materials. 3. When drilling materials with severe surface hardening, try to avoid friction on the cutting surface and large bit loss. 4. When cutting workpiece materials, pay attention to the use of cutting fluid, use it in time and keep it lubricated. 5. Fine use of

The main difference between milling cutter and drill bit is that the side edge of milling cutter has a back angle, so it can be cut laterally. The side edge of drill bit has no back angle, so it can not be cut laterally, which is used for axial drilling. Milling cutter: it is a rotary cutter with one or more cutter teeth for milling. During operation, each cutter tooth cuts off the allowance of the workpiece intermittently in turn. Milling cutter is mainly used for machining plane, step, groove, forming surface and cutting workpiece on milling machine. In order to ensure that a sufficiently high average chip thickness / feed per tooth is used, the number of milling cutter teeth suitable for the process must be correctly determined. Generally, it can be divided into: 1. Flat end milling cutter, rough milling, removing a large number of blanks, small area horizontal plane or contour finish milling. 2. Ball end milling cutter for semi finish milling and finish milling of curved surface; Small ball end milling cutter can finish milling steep surface / small chamfer of straight wall and irregular contour surface. 3. The flat end milling cutter has chamfer, which can be used for rough milling to remove a large number of blanks, and can also be used for fine milling of small chamfer of fine flat surface (relative to steep surface). 4. Forming milling cutter, including chamfering cutter, T-shaped milling cutter or drum cutter, tooth cutter and internal R cutter. 5. Chamfering cutter: the shape of chamfering cutter is the same as that of chamfering, which is divided into milling cutter for round chamfering and milling cutter for oblique chamfering. 6. T-shaped cutter can mill T-shaped groove. 7. Tooth profile cutter, milling out various tooth profiles, such as gears. 8. Rough leather cutter is a rough milling cutter designed for cutting aluminum copper alloy, which can be processed quickly.

Because the milling cutter contains one or more cutter teeth, it will be used in many machining processes, which greatly improves the efficiency of workpiece processing. Today's little sunflower nono class will give you popular knowledge. In addition to the characteristics of milling cutter, what are the differences between milling cutter and drill bit? Can a milling cutter be used as a drill? Let's have a look~ What are the characteristics of milling cutter? 1. Each tooth of the milling cutter periodically participates in intermittent cutting. 2. The cutting thickness of each cutter tooth changes in the cutting process. 3. Feed rate per tooth α F (mm / tooth), indicating the relative displacement of the workpiece within the time when the milling cutter rotates one tooth. What are the differences between milling cutter and drill bit? 1. Different uses Milling cutter is mainly used for machining plane, step, groove, forming surface and cutting workpiece on milling machine; Drill bit is one of the important tools for oil drilling, which is generally used for drilling. 2. Different categories Milling cutter is generally divided into sharp tooth milling cutter and shovel tooth milling cutter; The bit is divided into diamond bit, cone bit and scraper bit. 3. Different rear angle Milling cutter: the side edge of the milling cutter has a back angle, so it can cut laterally. Bit: the side edge of the bit has no back angle, so it can not be cut laterally. It is used for axial drilling. Can a milling cutter be used as a drill? What if there is no drill in some special cases? If you have a single edge and a double edge or three edge milling cutter that passes through the center, you can also use it as a drill.

Difference between pipe thread code g and R (RP): RP thread and G thread are two different threads. RP belongs to sealed pipe thread, cylindrical internal thread and interference fit thread. It not only plays the role of mechanical connection, but also plays the role of sealing. In addition to the requirements for large, medium and small thread accuracy, there are also requirements for the accuracy of tooth shape (tooth height, pitch and flank angle); G thread is an unsealed cylindrical pipe thread, with cylindrical internal and external threads. It is a clearance fit thread, which only plays the role of mechanical connection without sealing. Thread accuracy only requires large, medium and small diameter, and there is no requirement for tooth shape accuracy. These two kinds of threads have their own accuracy grade. For threads of the same specification, the pitch diameter deviation of the former is only about half of that of the latter. That is, the precision of RP thread is much higher than that of G thread

Drill bit is not only common in life, but also widely used in cutting tools. Many people's understanding of mold processing should start with drill bit. In fact, there are many kinds of drill bits. However, the materials for making drill bits are generally divided into three categories, one is high-speed steel, the other is cemented carbide and diamond drill bits. 1. Diamond bit Diamond bits include polycrystalline diamond (PCD) bits, CVD diamond bits, electroplated diamond bits, brazed diamond bits, etc. with the increasing application of new composite materials and the continuous progress of precision and ultra precision machining technology, diamond tools have also developed rapidly and can be used in automobiles Industrial abrasive materials processed by aerospace and all composite materials greatly meet the high-quality requirements for drilling; Diamond bit bodies are made of fine-grained cemented carbide materials, with sharper cutting edges, higher machining quality and longer tool life; The tool material has higher thermal conductivity, and the groove shape is optimized according to the material characteristics. 2. High speed steel High speed steel (HSS) is a kind of tool steel with rigidity, hardness, high wear resistance and high heat resistance, also known as high speed tool steel and front steel, commonly known as white steel; High speed steel tool is a tool that is stronger and easier to cut than ordinary tools. High speed steel has better toughness, strength and heat resistance than carbon tool steel, and the cutting speed is much higher than carbon tool steel (iron carbon alloy), so it is named high speed steel; The performance of cemented carbide is better than that of high-speed steel, and the cutting speed can be increased by 2-3 times. characteristic: The red hardness of high speed steel can reach 650 degrees. High speed steel has good strength and toughness, sharp cutting after grinding and stable

How to select cemented carbide bit? Cemented carbide bit selection is based on the use scenario. Nono sorted out the common use scenarios for you. 1. Used on advanced machining centers The integral cemented carbide bit is selected. This bit is made of fine-grained cemented carbide material. In order to prolong its service life, it is also coated. The specially designed geometric edge makes the bit have self centering function, and has good chip control and chip removal performance when drilling most workpiece materials. 2. Used on lathes and other rotary machining machines The cemented carbide indexable blade bit is selected, which has a wide range of machining hole diameter and machining depth range of 2D ~ 5D (D is the hole diameter). 3. Machining center, CNC lathe or other high rigidity and high speed machine tools. Select welded cemented carbide bit or replaceable cemented carbide crown bit. This kind of bit firmly welds a cemented carbide crown on the steel drill body or is composed of steel drill body and replaceable integral cemented carbide crown. The self centering geometric edge type is adopted, the cutting force is small, and good chip control can be realized for most workpiece materials. The machined hole has good surface finish, high dimensional accuracy and positioning accuracy, so there is no need for subsequent finishing. What are the types of cemented carbide bits? Although there are many cemented carbide bits, there are only four basic types: integral cemented carbide bit, cemented carbide indexable blade bit, welded cemented carbide bit and replaceable cemented carbide crown bit.