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  • PCBN Tool

    PCBN tool is used to turn hardened steel, it is required that the quenching hardness of the workpiece should be higher than 45 ~ 55HRC. When hard cast iron is processed, as long as the hardness reaches the medium hardness level (45HRC), a good processing effect will be achieved. For example, the exhaust valve seat on the cylinder head of an automobile engine is made of high chromium alloy cast iron material containing copper and molybdenum, the hardness of which is generally about 44HRC. Features of PCBN tool PCBN tool has been widely used in the CNC cutting industry, is a tool material with good development prospects. PCBN tool the hole of the valve seat is countersunk (reaming), two kinds of process, most of which are processed on the special automatic line, together with the gun reaming pipe hole. Adopted by the cutting dosage is nu c = 71.6 m/min, nu f = 26.5 mm/min, alpha p = 1.0 mm, with BC broaching oil. After processing by the PCBN cutting tool, compared with using various carbide insert processing, cutting tool durability for an average of 1200 pieces. The processing surface roughness is Ra0.4 microns, seat surface runout 0.05 mm or less. Since the use of the PCBN tool in Dongfeng motor engine plant in 1988, the effect has been stable, and the tool localization problem of imported equipment has been well solved. Beijing Demina produces is reliable in performance and easy to be operated. Users only need to use very little manual skills when using it and can grind CVD blades, PCD, PCBN. In addition, it can grind machine tool inserts, boring cutters, grooving, carbide and HSS non-standard inserts, standard or non-standard welding lathe tools, and various other tools.  
  • Three Sharpening Characteristics Of The Sharpener

    Precision APE 60 - Sharpening Machine is a device for dressing tools. It is used by companies in general to repair high-speed steel tools. And a small number of tools are used to trim carbide and other super-hard materials. But do you know why companies like to use a sharpener? That's because the sharpener increases the strength of the blade, increases the life and processing capacity of the blade. And the sharpened blade is in a straight line. Another important reason is that it can save costs. is not only beautiful in appearance, novel in structure and good in performance. It is suitable for milling cutters of various diameters, shapes, and angles for sharpening and milling machines. By the tip of the mold. Therefore, the sharpening machine is the necessary equipment for computer engraving machine and engraving and milling machine and is specially designed for sharpening and milling machine. Three sharpening characteristics of the sharpener The sharpening machine was first called APE 60 drill tool grinder. Mainly for sharpening center, large book, a printing factory. And other institutional enterprises, book printing center, medium-sized grinding room. In general, the correct sharpening edge of the blade is divided into three types to achieve the purpose, namely: rough grinding, fine grinding, and finishing curing. One of the sharpening methods of the sharpener is coarse grinding. Its characteristic is that the feed rate is relatively large, and the purpose is to remove the cutting edge defect. However, it is worth noting that during operation, the temperature at the point of contact between the blade and the grinding wheel should not be too high. The surface of the grinding surface should not light yellow or even blue-blue. The second method of sharpening of the sharpening machine is fine grinding. It is an important step in sharpening the knife. "Uniform micro feed" and "sufficient cooling" are two key points. In general sharpening, the water and saponified oil must use in the sharpening zone with a 30:1 mixing ratio of the cooling liquid. Which is directly sprayed on the grinding wheel and the blade grinding contact point, so that the friction heat generated during the entire grinding process is fully obtained. Cooling has a triple effect of cooling, rust, and lubrication. The third method of sharpening of the sharpening machine is photo-curing. It refers to the fact that the grinding wheel travels several times in the lateral direction without feeding, so as to achieve the purpose of improving the straightness of the cutting edge and the quality of the sharpening surface. Generally, a blade with a length of 1 meter has to go through 7 to 8 strokes, and a long blade has to go through more than 20 strokes to meet the requirements.  
  • Classification Of Grinding Machine

    Performance, variety and output of grinding machines are constantly improving with the increasing number of high-precision and high-hardness mechanical parts . (1) Cylindrical grinding machine: it is mainly used for grinding cylindrical and conical external surface. (2) Internal grinding machine: it is mainly used for grinding cylindrical and conical internal surface. (3) Jig grinder:  It has precise coordinate positioning device, which is used for grinding precision holes with high precision requirements and forming surface (4) Centerless grinding machine:It is a type of grinding machine that does not need to use the work piece axis positioning, mainly composed of grinding wheel, adjusting wheel and work piece support. (5) Plane grinding machine: The work piece is grinding by rotated wheel to achieve the required flatness. It can be divided into rectangular worktable and circular worktable according to the shape of the worktable. (6) Abrasive belt grinder: a grinder that uses a fast moving abrasive belt for grinding. (7) Honing machine: The work piece is grinding by a honing head.It is mainly used in honing work piece hole in automobile, tractor, hydraulic parts, bearings, aviation and other manufacturing industry.There are vertical and horizontal honing machines. (8) Grinding machine: it is used for grinding plane or cylindrical internal ans external surface of the work piece. (9) Guide grinding machine:it is mainly used for grinding guide surface of the machine. (10) Tool grinding machine: a grinder used for grinding tools. (11)Multi-purpose grinder: it is used for grinding cylindrical, conical internal, external surface or plane.It can grind a variety of work pieces with the following device and accessories . (12)Special grinding machine: a special machine for grinding certain kinds of parts. (13) End surface grinder: a grinder used for grinding the end surfaces of gears. Beijing Demina Precision Machinery Co.,Ltd is a direct manufacturer specialized tool grinding machine for drills and cutters more than ten years.We produce PCD and CBN tool grinding machines BT150 series and dedicate to researching and developing control and application software for tool grinder.      
  • Five-Axis CNC Tool Grinder

    Technical features and standard configuration 1.It is made from cast iron base, the linear horizontal transverse axis (X), horizontal longitudinal axis (Y) and the workpiece rotation axis (A) are is installed on the bed of the frame. 2.The grinding wheel head and the vertical linear axis (Z)are installed on the rotation axis(B). They are all made from cast iron and installed on the machine bed.The rotation spindle is imported from abroad with high precision worm and gear. Alllinearshafts are adopted imported precision ball screw and guide rail, to ensure high precision, high sensitivity and good durability. The spindle DC motor power is 12KW; speed range: 1000 - 9000rpm. The spindle is equipped with two-way converter. Three different grinding wheels can be installed on the same flange of the grinding wheel mainspindle. The water retaining cover is made of 8 mm Lexan plastic, which is convenient for loading and unloading the cutting tools and internallighting. The working head is equipped by ISO40 standard, a diameter of 20 hydraulic expanding shank, can avoid grinding interference, hydraulic expansion chuck containssix high precision fixture. (Standarddiameters 4mm,6mm,8mm,10mm,12mm, 16mm). It contains a capacity of 50 liters of cooling oil tank, up to 15 L / min, and finally filtered to the 5 micron coolingtank. Electronic hand wheel precision has four kinds of 1mm, 0.1mm, 0.01mm, 0.001mm tochoose. Accuracy 480 mm / min: 1 micron Protection level standard: IEO IP X8 9.Heavy design, closed structure, good rigidity, high strength, good stability
  • Cutting Tool Materials

    Progress in cutting tool materials Material is the material basis of human development and one of the main manifestations of social progress. Hard alloy is a kind of composite material made by hard phase of refractory metal and binder metal through the powder metallurgy process. It is widely used in the modern manufacturing industry for its excellent properties. It is called "industrial tooth" and originated in the 1920s. With the economic globalization and the progress of science and technology. The demands of hard alloy products are higher and higher. The technology development of the hard alloy industry is also very fast, especially the hard alloy cutter and carbide blade. Characteristics of cutting tool materials Carbide blade, especially indexable carbide tools, are the leading products of CNC machining tools. In recent years, various types of integral and indexable carbide tools or inserts have been extended to various cutting tools. In the field, the indexable carbide tools are expanded from simple turning tools and face milling cutters to various precision, complex and forming tools. Adding a small number of elements in the hard alloy can strengthen the hard phase and bonding phase. Purify grain boundary and improve the bending strength and impact toughness of the material. Superfine grain cemented carbide and nanostructure coatings have become the main trend. At present, the technology of the carbide cutter is developing in two opposite directions. On the other hand, special material is more and more targeted. More suitable to be processed materials and cutting conditions, so as to improve the cutting efficiency.    
  • Selection And Parameters Of Cubic Boron Nitride Blade For Machining High Manganese Steel

     Parameters of cubic boron nitride blade High manganese steel has good plasticity and toughness when the tool wear surface is bad. After repeated grinding and processing, sand inclusion, porosity and other easy to collapse knife. Later, the cubic boron nitride blade of the ceramic cutter and metal matrix was used, and the phenomenon of knife breakage occurred during processing. Finally, the non-metallic binder CBN was selected to save processing time and improve processing efficiency. Tool material selection: CBN tool, cutting parameters: AP(depth)= 7.5mm, FR(cutter)= 0.3mm/r, VC(cutting speed)= 80m/min dry cutting. Coarse rolling, AP =6 ~10mm;FR/r = 0.25 0.8 mm;Vc =8 m/min;Alpha p=1 ~ 3mm;F/r = 0.2 ~ 0.4 mm. When the ap 1 mm or less;F/r 0.2 mm or less. Cutting linear velocity v=135m/min, tool durability :3 hours/edge.The blades can be rotated 8 to 12 times and last for 24 hours. Cutting parameters: ap=2.5-4.5mm,Fr=0.25-0.4mm/r,Vc=90m/min, dry cutting, intermittent cutting.The workpiece is face milling with intermittent cutting. Cutting amount ap=2.5mm;Fr=0.25-0.4mm/r;Linear velocity Vc=90m/min.This type of blade milling high manganese steel tool has a strong impact on toughness, processing surface irregularity, tools no longer like other ceramic blades and cubic boron nitride blade collapse or fracture. Selection of cubic boron nitride blade Non-metallic adhesive PCBN blade. It can not only intermittent cutting of high manganese steel, sand, irregular surface, but the irregular surface of casting defects is also particularly suited to high manganese steel parts especially the processing of large parts. Improves the machining efficiency is not only the speed of increase, due to the increase of cutting depth greater extent. It can avoid further work hardening of high manganese steel, high manganese steel cutting characteristics. Material as a new high manganese steel tool material processing, compared with traditional hard alloy and high hardness ceramic tools. And ceramic tools and metal base cubic boron nitride anti-impact toughness can achieve efficient processing and dry cutting. CBN cubed boron nitride non-metallic bond blade is the whole polycrystalline material cutter. Cutting depth of more than 7mm, than ordinary ceramic cutter and CBN cutter impact resistance. Especially for the casting process of the surface of the blank, can pull the rough car, the workpiece must be polished and leveled before processing. The performance and edge of this kind of lathe tool are the research and development of the machining performance of manganese steel castings. Do not use ordinary mild treatment, such as low carbon steel 45. Use a high manganese steel turning tool. Each tool amount is selected according to the different toolbar, can not be generalized.
  • Diversified Demand Of Tool Grinder Market

    Depending on the industry, product, and production model, it is wise to choose the right tool for grinding equipment.CNC tool grinder is not the best choice as automation equipment for variety and small batch high precision grinding. We can use a number of 2 or 3 axis economic tool grinder to form an efficient production line for mass production; Short supply cycle, medium and small batch of high value-added tools can choose five-axis linkage tool grinder. Even in the developed countries, grinding only by the is not economic. Many flexible structures and equipped with professional grinding accessories manual tool grinder can also meet the daily tool grinding of workshop requirements. Drill bit grinding generally relies on professional equipment. We can choose the economical CNC drill tip grinder if there are more types of drill tip and high efficiency. Beijing Demina Precision Machinery Co., Ltd relying on many years of accumulated technical and service experience, in the tool grinding industry, dedicated to providing users with the most economical solutions. Our company will be in the spirit of tenet, perseverance, excellence, to provide users with professional services for a long time.  
  • The CBN Tool

    CBN is synthesized under high temperature and high pressure, its hardness is second only to diamond, and the thermal stability is much higher than diamond, chemical stability is good, and iron metal elements in 1200 ~ 1300℃ also does not occur chemical reaction, so CBN tools are mainly used in ferrous metal materials, such as cast iron/steel high hardness difficult to process materials field. CBN tool in the process of processing, according to the processing conditions can be divided into continuous cutting and intermittent cutting, according to the different working conditions, the CBN tool change factors are different. Such as continuous cutting is the common form of tool change wear, and intermittent cutting common form of tool break, crack and so on. The following emphasis on the CBN tool intermittent cutting tool change form. The CBN tool intermittent cutting tool change form (1) Breaking edge This is a common form of breakage in the intermittent cutting of steel and cast iron by CBN tools. It is a small cut in the cutting edge, several small cuts in the blade or a small piece are broken. Generally, the size of the gap is equal to or slightly larger than the feed. If the micro - edge of the tool can continue to cut within the allowable wear limits, out - of - tolerance needs to be replaced. (2) Peeling When end milling steel and cast iron, shell-like spalling occurs most often on the front cutting surface. CBN tool ends milling hardened steel (hrc58-65), a large area of shell spalling on the front knife surface, such wear, can be increased by cutting speed, reduce feed, use negative chamfering, blade after passivation treatment. (3) Broken for cutting high hardness materials or intermittent cutting workpiece frequent breakage form. This is due to the excessive impact load when the intermittent cutting high hardness of the workpiece. And short time cutting after the occurrence of early damage, although the cutting condition, the appropriate cutting after a long time, but no tool change in time, because of the cutting tool material fatigue occurs a large fracture. (4) Crack After a long time of intermittent cutting, there are mechanical fatigue cracks parallel to the cutting edge caused by mechanical impact, and also cracks perpendicular to or inclined to the cutting edge caused by thermal impact. When these cracks expand and merge, they can cause the blade to break or break.
  • We Are About To Launch A New Product--BT-2 Wheel Dressing Machine

    Bt-2 wheel dressing machine adopts a simple principle. The principal bases on the fact that different materials consumes differently by the same speed rotation to achieve the dressing of the grinding wheel. The machine can perform simple and efficient dressing on the diamond wheel, CBN wheel and wheel pack composed of multiple wheels. It can dress plane, Angle, arc and shaped wheel and is easy to operate with high precision. BT-2 wheel dressing machine Features 1. With precise linear slide rail, ball screw and linear scale, width dimension and its accuracy are adjusted and measured at any time during wheel dressing. 2. Both rotating spindles adopt high precision bearing, reaching the rotary accuracy, and stability. 3. The rotation speed left and right swing speed, swing distance and position of dressing wheel can be adjusted. 4. The speed of the grinding wheel is adjustable and its position is adjusted by the cross worktable. 5. The circular encoder is added to the manual spindle, which can make the adjustment of the Angle of the dressing wheel more conveniently and accurately. Display resolution is 0.05 °. 6. A CCD camera with the microscope has the magnification of 15 to 120 times. It can measure the radius, Angle and size of the wheel. 7. Bt-2 wheel dressing machine the CCD camera and linear scale provide a simple way to set and measure the width of the grinding wheel as well as the inspection of the wheel during or after dressing. The measurement accuracy can reach 0.005~0.01mm.
  • CNC Grinding Machine Manufacturers Operating Regulations

    CNC grinder, its safe operation procedures have been explained in front of the content, so on the basis of this, to introduce its operation procedures, I believe we can more easy to understand and grasp because the front has a foundation. At the same time, CNC grinder manufacturers also hope that through this article, we can let you know more about CNC grinder, increase the understanding of this aspect. Operating procedures of CNC grinding machine CNC grinding machine operating procedures, the main contents are: 1. All operators should have professional training and assessment, and be very familiar with the machine and equipment. 2. All operators shall strictly abide by the safety and shift management system in the work process. 3. The machine and equipment in use should be lubricated in accordance with the requirements, and the lubrication part should be lubricated in place and fully, mainly using lubricating oil in accordance with the requirements. 4. Before working, the operator shall wear labor protection articles and inspect the equipment. If there is any problem, the operator shall not start the car and shall deal with it immediately. 5. CNC grinder manufacturers can not be unattended when grinding machine work. If the operator must leave, he should first remove the grinding wheel from the workpiece, then stop the machine, and then leave the grinding machine. 6. During the work of CNC grinder, the operator should observe the operation of the equipment at any time, whether there is any abnormal phenomenon if there is timely treatment. 7. No goods can be placed on the surface of the work table, nor can the workpiece be knocked, disassembled and straightened. 8. After the equipment is used and the work is completed, first remove the grinding wheel from the workpiece, then cut off the power of the equipment, pay attention to the handle should be placed in the empty place, and finally carry out daily maintenance. 9. Clean and clean the work site after the work, fill in the work record, and do the shift work well.
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