China Supal (Changzhou) Precision Tools Co.,Ltd company news

Compared with standard milling cutters, high-speed steel ball end milling cutters have the following characteristics: The appearance is simple, bright, unique, novel and distinct; The geometric accuracy is 40% higher than that of standard products, and it is recommended for rough milling, semi-finishing and suitable finishing; Improve the front and rear corner finish, so that the cutting edge is sharp and chip removal is brisk. Relief edge width increased by 15%. Increased strength, stable and reliable; After a unique process, the service life is twice that of standard milling cutters, and it has a high cost performance. It can be used for both general-purpose equipment in traditional milling methods and CNC equipment. The milling cutter is used for processing high hardness materials, and the hardness of the workpiece is HRC50~55 degrees. Using the latest coating and nano-grade tungsten steel raw materials. The short-edge design is suitable for high-speed milling; dry cutting is also possible. Small-diameter ball-end and small-diameter flat-end milling cutters are designed with sharp rounded corners (a little R angle). Small-diameter ball end milling cutters can reduce chipping and increase tool life. High-speed steel ball end milling cutters can mill die steel, cast iron, carbon steel, alloy steel, tool steel, and general iron materials, and are end mills. Ball nose milling cutters can work normally in high temperature environments. High-speed steel ball end milling cutter application: widely used in various curved surfaces, arc groove processing. High temperature resistance: The maximum temperature for maintaining cutting performance is 450-550/500-600 degrees Celsius. The edge of the high-speed steel ball end mill with a large R angle is stronger than the sharp corner of the end mill, and it is not easy to collapse, that is, the life is more stable than that of the end mill. In addition, when it is used for 3D machining, the processing area of the ball cutter is R Corner cutting edge, machining distance and depth of cut can use larger values, the machining efficiency is improved and the quality of the machined surface is also improved.

Thread milling cutters mainly use thread turning tools to turn threads or use taps and dies to manually tap and buckle. Compared with traditional thread processing methods, thread milling has great advantages in processing accuracy and processing efficiency, and it is not restricted by thread structure and thread rotation during processing. For example, a thread milling cutter can process a variety of different rotation directions. Internal and external threads. For the thread that does not allow transitional buckle or undercut structure, it is difficult to machine using traditional turning methods or taps and dies, but it is very easy to achieve using CNC milling. In addition, the durability of thread milling cutters is more than ten times or even dozens of times that of taps, and in the process of CNC milling threads, it is easy to adjust the size of the thread diameter, which is difficult to achieve with taps and dies. Due to the many advantages of thread milling, the current milling process has been widely used in mass thread production in developed countries. Thread milling cutter classification: 1. Integral type: suitable for small and medium diameter thread milling of steel, cast iron and non-ferrous metal materials, smooth cutting and high durability. Thread cutters with different coatings are used to process different materials. 2. Welding type: DIY type thread milling cutter used to process deep holes or special workpieces and weld the head of the thread milling cutter to another tool. The cutter has poor strength and flexibility, and its safety factor depends on the workpiece material and the technology of the thread milling cutter maker. 3. Replaceable blade type: It is composed of a milling cutter bar and blades. Its characteristics are that the blades are easy to manufacture and low in price. Some threaded blades can be cut on both sides, but the impact resistance is slightly worse than that of integral thread milling cutters. Therefore, this tool is often recommended for machining aluminum alloy materials. Advantages of thread milling cutter: 1. The processing efficiency of thread milling cutter is much higher than that of wire tapping. 2. Blind hole thread milling cutters can be milled to the bottom, but not wire tapping. 3. The finish is good, and the teeth milled by the thread milling cutter are more beautiful than the wire tap. 4. A thread milling cutter can process internal and external threads of different rotation directions, but wire tapping is not acceptable. 5. Thread milling cutter is not full-tooth contact cutting, and the load and cutting force of the machine tool are smaller than that of wire taps. 6. When processing large threaded holes, the efficiency of wire tapping is low, and the thread milling cutter can be instantaneously realized. 7. An optional thread milling cutter bar can replace metric, American, and English blades, which is economical. 8. When processing high-hardness threads, the thread taps are severely worn and even unable to be processed. The thread milling cutter can be easily realized. 9. The thread milling cutter cuts into powdery short chips, and there is no possibility of entanglement. The wire tap is processed into spiral iron chips, which is easy to entangle the tool. 10. Easy to install and clamp. Flexible tapping tool holder is required for tapping. ER, HSK, hydraulic, thermal expansion and other tool holders for thread milling cutters can be used. 11. For some materials, thread milling cutters can drill, mill teeth and chamfer at one time, but wire taps cannot. 12. For threaded holes with the same pitch and different sizes, several taps need to be replaced, and thread milling cutters can be used universally. 13. The cost is lower. Although a single thread milling cutter is more expensive than a wire tap, the cost of a single threaded hole is higher than that of a wire tap. 14. The precision is higher, the thread milling cutter realizes the precision with the tool compensation, and the customer can choose the thread precision he needs at will. 15. Long life, the life of thread milling cutter is more than ten times or even dozens of times that of wire tap, reducing the time of tool change and machine adjustment. 16. Don't be afraid of breaking. After the wire tap is broken, the workpiece may be scrapped. Even if the thread milling cutter is manually broken, it is easy to take out, and the workpiece will not be scrapped.  

High-speed steel (HSS) is a tool steel with high hardness, high wear resistance and high heat resistance, also known as high-speed tool steel or high-speed steel, commonly known as white steel. High-speed steel tools are tougher and easier to cut than ordinary tools. High-speed steel has better toughness, strength and heat resistance than carbon tool steel, and its cutting speed is higher than that of carbon tool steel (iron-carbon alloy). Many, hence the name high-speed steel; and cemented carbide has better performance than high-speed steel, and the cutting speed can be increased by 2-3 times. Features The red hardness of high-speed steel can reach 650 degrees. High-speed steel has good strength and toughness. After sharpening, the cutting edge is sharp and the quality is stable. It is generally used to manufacture small, complex-shaped tools. Cemented carbide Tungsten steel drill bit material (hard alloy) The main components of the drill bit material are tungsten carbide and cobalt, which account for 99% of all components, and 1% is other metals, so it is called tungsten steel (hard alloy). Tungsten steel is a sintered composite material composed of at least one metal carbide . Tungsten carbide, cobalt carbide, niobium carbide, titanium carbide, and tantalum carbide are common components of tungsten steel. The grain size of the carbide component (or phase) is usually between 0.2-10 microns, and the carbide grains are bonded together using a metal binder. The bonding metal is generally iron group metals, and cobalt and nickel are commonly used. So there are tungsten-cobalt alloys, tungsten-nickel alloys and tungsten-titanium-cobalt alloys. Tungsten steel drill bit material sintering molding is to press the powder into a blank, then heat it into a sintering furnace to a certain temperature (sintering temperature), keep it for a certain time (holding time), and then cool it down to obtain the tungsten steel material with the required performance. Features: The red hardness of cemented carbide can reach 800-1000 degrees. The cutting speed of cemented carbide is 4-7 times higher than that of high-speed steel. High cutting efficiency. The disadvantages are low bending strength, poor impact toughness, high brittleness, low impact resistance and low vibration resistance.

The main difference between a milling cutter and a drill bit is: the side edge of the milling cutter has a relief angle, so it can be cut sideways. The side edge of the drill bit has no relief angle, so it cannot be cut laterally and is used for axial drilling. Milling cutter: It is a rotary cutter with one or more teeth used for milling. When working, each cutter tooth intermittently cuts off the margin of the workpiece. Milling cutters are mainly used for machining planes, steps, grooves, forming surfaces and cutting off workpieces on milling machines. In order to ensure that a sufficiently high average chip thickness/feed per tooth is used, the number of teeth of the milling cutter suitable for the process must be correctly determined. It is roughly divided into: 1. Flat-end milling cutter, rough milling, remove a lot of blanks, small area horizontal plane or contour finish milling. 2. The ball end milling cutter can be used for semi-finishing and finishing milling of curved surfaces; the small ball end milling cutter can finish milling steep surfaces/small chamfers of straight walls and irregular contour surfaces. 3. The flat-end milling cutter has a chamfer, which can be used for rough milling to remove a large amount of blanks, and also for fine milling of small chamfers on the flat surface (relative to the steep surface). 4. Forming cutters, including chamfer cutters, T-shaped cutters or drum cutters, tooth cutters, and inner R cutters. 5. Chamfering cutter, the shape of the chamfering cutter is the same as the chamfering shape, and it is divided into milling cutters for round chamfering and oblique chamfering. 6. T-shaped milling cutter can mill T-slots. 7. Tooth type milling cutter, milling out various tooth types, such as gears. 8. Rough milling cutter, a rough milling cutter designed for cutting aluminum-copper alloys, can be processed quickly.

With the development of modern science and technology, various high-hardness engineering materials are increasingly used, and traditional turning technology is difficult or impossible to process certain high-hardness materials. Coated cemented carbide, ceramics, PCBN and other super-hard tool materials have high high-temperature hardness, wear resistance and thermochemical stability, which provide the most basic prerequisites for the cutting of high-hardness materials. Obvious benefits have been achieved in production. The material used by superhard tools and their tool structure and geometric parameters are the basic elements for hard turning. Therefore, how to choose superhard tool materials and design reasonable tool structures and geometric parameters is very important to stably realize hard turning. Blade structure and geometric parameters of superhard tools Reasonable determination of insert shape and geometric parameters is essential to give full play to the cutting performance of the tool. In terms of tool strength, the tip strength of various blade shapes from high to low are: round, 100° diamond, square, 80° diamond, triangle, 55° diamond, 35° diamond. After the blade material is selected, the blade shape with the highest strength should be selected. Hard turning inserts should also choose the largest possible nose arc radius, and rough machining with round and large nose arc radius inserts. The nose arc radius during finishing is about 0.8μm. Hardened steel chips are red and soft ribbon-like, brittle, easy to break, non-sticky, hardened steel cutting surface quality is high, generally does not produce built-up edge, but the cutting force is large, especially the radial cutting force It is larger than the main cutting force, so the tool should adopt a negative rake angle (go≥-5°) and a larger relief angle (ao=10°~15°). The entering angle depends on the rigidity of the machine tool, generally 45°~60° to reduce the chatter of the workpiece and the tool. Superhard tool cutting parameters and requirements for process system 1. Selection of cutting parameters The higher the hardness of the workpiece material, the lower the cutting speed should be. The suitable cutting speed range for hard turning and finishing using superhard tools is 80~200m/min, and the commonly used range is 10~150m/min; when large cutting depth or strong intermittent cutting of high hardness materials is adopted, the cutting speed should be kept at 80~100m /min. Under normal circumstances, the cutting depth is between 0.1 and 0.3 mm. For workpieces with low surface roughness, a small depth of cut can be selected, but it should not be too small and should be suitable. The feed rate can usually be selected from 0.05 to 0.25mm/r, and the specific value depends on the surface roughness value and productivity requirements. When the surface roughness Ra=0.3~0.4μm, hard turning with superhard tools is much more economical than grinding. 2. Requirements for the process system In addition to choosing a reasonable tool, the use of superhard tools for hard turning has no special requirements on the lathe or turning center. If the lathe or turning center is rigid enough, and the required accuracy and surface roughness can be obtained when processing soft workpieces, that is Can be used for hard cutting. In order to ensure the smoothness and continuity of the turning operation, the commonly used method is to use a rigid clamping device and a medium rake angle tool. If the positioning, support, and rotation of the workpiece can be kept fairly stable under the action of cutting force, the existing equipment can use superhard tools for hard turning. After years of research and exploration, my country has made great progress in superhard tools. However, the application of superhard tools in production is not extensive. The main reasons are as follows: manufacturers and operators do not know enough about the effect of hard turning with superhard tools. It is generally believed that hard materials can only be ground; the cost of tools is too high. The initial tool cost of hard turning is higher than that of ordinary cemented carbide tools (for example, PCBN is more than ten times more expensive than ordinary cemented carbide), but the cost allocated to each part is lower than that of grinding, and the benefits brought are more than ordinary Cemented carbide is much better; the research on the machining mechanism of superhard tools is not enough; the specifications of superhard tool machining are not enough to guide production practice. Therefore, in addition to in-depth research on the machining mechanism of superhard tools, it is also necessary to strengthen the training of superhard tool processing knowledge, successful experience demonstrations and strict operating specifications, so that this efficient and clean processing method can be used more in actual production.

As one of the important configurations of CNC lathes, cutting tools play a vital role in the operation of machine tools. Because CNC lathe processing is a high-precision work, and its processing procedures are concentrated and the number of parts clamping is small, so higher requirements are placed on the CNC tools used. When choosing tools for CNC machine tools, the following issues should be considered: (1) The type, specification and accuracy grade of CNC tools should be able to meet the requirements of CNC lathe processing. (2) High precision. In order to meet the high precision and automatic tool change requirements of CNC lathe processing, the tool must have high precision. (3) High reliability. To ensure that there will be no accidental damage and potential defects of the tool in the CNC machining, which will affect the smooth progress of the machining, the tool and the accessories combined with it must have good reliability and strong adaptability, and precision metal processing. (4) High durability. The tools processed by CNC lathes, whether in roughing or finishing, should have higher durability than those used in ordinary machine tools, so as to minimize the number of times of changing or grinding tools and tool setting, thereby improving the processing of CNC machine tools. Efficiency and guarantee processing quality. (5) Good chip breaking and chip removal performance. In CNC lathe processing, chip breaking and chip removal are not handled manually like ordinary machine tools. Chips are easy to wrap around the tool and workpiece, which will damage the tool and scratch the processed surface of the workpiece, and even cause injury and equipment accidents. , Which affects the processing quality and the safe operation of the machine tool, so the tool is required to have better chip breaking and chip removal performance

At present, the processed aluminum parts are mainly divided into two categories: deformed aluminum alloy and cast aluminum alloy. Then, what kind of milling cutter is used for processing aluminum alloy, is it special milling cutter for aluminum alloy or special cutter for aluminum alloy, and its processing efficiency is better? In this paper, from the aspects of milling characteristics, machining tools and cutting parameters of aluminum alloy, it is best to talk about the milling cutter used for machining aluminum alloy. First, the processing characteristics of aluminum alloy Milling aluminum alloy has the following major features; 1. Low hardness of aluminum alloy Compared with titanium alloy and other hardened steel, the hardness of aluminum alloy is lower, of course, heat treatment, or the hardness of die-cast aluminum alloy is also high. The HRC hardness of ordinary aluminum plates is generally below 40 degrees HRC. Therefore, when machining an aluminum alloy, the load of the tool is small. Because of the better thermal conductivity of aluminum alloy, the cutting temperature of milling aluminum alloy is relatively low, which can improve the milling speed. 2. The alloy of aluminum is low in plasticity and has low plasticity and low melting point. When the aluminum alloy is processed, the problem of the sticking knife is serious, the chip discharging performance is poor, and the surface roughness is also relatively high. In fact, the processing of aluminum alloy is mainly the sticking knife and the roughness is not good. As long as the two problems of the sticky knife and the surface quality are solved, the problem of aluminum alloy processing is solved. 3, the tool is easy to wear because the tool material is not suitable, when processing aluminum alloy, the tool wear is often accelerated due to problems such as sticking knife and chip removal.   Machining aluminum alloys generally use a 3-blade aluminum milling cutter. Secondly, due to the difference in processing conditions, a 2-blade ball-end knife or a 4-blade flat-bottom knife is likely to be used. However, it is recommended that in most cases, a 3-blade flat end mill can be used. 1. The number of selected blades for aluminum tungsten steel milling cutters is generally 3 blades. The material is generally selected from YG type hard alloys, which can reduce the chemical affinity of the tool and aluminum alloy. General CNC tool brands have a series of special milling cutters for processing aluminum alloys. 2, high-speed steel material high-speed steel aluminum milling cutter is more sharp, but also can be well processed aluminum alloy. 3. Cutting parameters of milling aluminum alloy High-speed large-feed milling can be selected for processing ordinary aluminum alloys. Secondly, choose a larger front angle as much as possible to increase the chip space and reduce the phenomenon of sticking. If it is a finished aluminum alloy, it is not possible to use a liquid cutting fluid to avoid forming small pinholes on the machined surface. Generally, kerosene or diesel oil can be used as the cutting fluid for processing aluminum plates. The cutting speed of the machined aluminum alloy milling cutter varies depending on the material and parameters of the milling cutter and the machining process. The specific cutting parameters can be processed based on the cutting parameters given by the manufacturer.

Due to the high hardness of materials above HRC60, the tungsten tungsten milling cutters in the processing process are difficult to meet the processing requirements. After 10 minutes of CNC machining, severe wear and even broken tools appear. The high speed machine is more serious. After many fires, the mold requirements are higher and more difficult, so the accuracy of using ordinary tungsten milling cutters is not up to the following, so the selection of processing tools should pay attention to the following points:   1. Select the ultra-fine particle bar and the tungsten rigid milling cutter with high rigidity. This ensures the toughness and rigidity of the tool. 2. Choose the blade high helix angle design and the four-blade unequal design. This allows the tool to be slanted at high speeds and high hardness with small and powerful cutting. 3. Choose a new crystal coated tool. Many of the tungsten milling cutters on the market use PVD coatings to a large extent that cannot meet high hardness cutting. The new crystalline coating fundamentally addresses high temperature/acidification/wear resistance/longer life. 4. Cooperate with powerful tool companies to further obtain their technical support and tool configuration, reduce procurement links and reduce procurement costs. High rigidity tool design and new coating of tungsten rigid cutting cutter have high efficiency, high precision and long life in high speed and high hardness cutting. High speed and high efficiency processing from pre-hardened steel to hardened steel; High-precision finishing and other long-life; high-precision; high-quality processing. It is so easy to process high speed machines with high hardness.