Industry Dynamics

Company Dynamics

Partial Chamfering

Partial Chamfering

There are a variety of different effects to be used in the sides of the part. The method described here can make the molding of the parts easier. In a case in actual processing, the CNC programmer faces the problem of low efficiency when completing the following chamfer processing. The task is 0.1 inches in the periphery of a part and the middle cavity chamfer. Customers are waiting for the parts to be completed, they will often go to the machining site. The machining progress of the chamfering process is indeed very slow, making customers dissatisfied. The programmer is accelerated by 3D chamfer processing methods. The cutting parameters used in the processing are as follows: the speed of 7000 rpm, feed 100 inch / min, and 0.002 inches. The time required to complete the chamfering process is 29 minutes. The problem with the cutting scheme is too small, and the steps are set in the G code and cannot be adjusted on the machine. If the cutting parameters are increased as follows: The speed is 10,000 rpm, the feed is 300 inches / minute, the step distance is 0.006 inches, and the process time can be shortened to 3.8 minutes. 3D method machining fillet. The rounded cutter can be used, but the installation and adjustment of the rounded tool is more complicated. Therefore, it is more preferred to use a ball-making milling cutter to process a soft material such as aluminum, rounded milling cutter to process steel material. With this 3D processing method, the computer has almost no adjustment of all considerations. Rounded milling cutters The cutting edge of the ball milling cutter is shorter, and its cutting force is smaller. Due to it is easy to process chamfer and round circles in CAD software, design engineers usually add chamfer and round circles to the entity model, so that the parts look more beautiful. However, most of them did not realize that the actual cutting rounded corners and chamfer are very much simpler as the corners and rounds. There is no uniform chamfer in the inner garden. This happens is that the Z-to-height setting of the chamfer knife is incorrect. It is easier to work with the ball-head milling cutter and 3D method processing holes. Since the cutting tool of the chamfer knife is not good, if the programming is intermediate cutting, a burr is generated. This is because the tip part is not enough, and the theoretical cutting line speed of the knife tip is 0. In addition, the knife pointer is not sharp. To make the chamfer knife cut tidy without burr, the knife tip needs to be offset to cut the contour. In the new version of CAM software, the chamfering knife can be biased to cut out neat contours. When a chamfering knife is biased, the depth of the tool is correct. If it is incorrect, uneven chamfer will be cut at the inner circular plane. Although this problem can be solved by the prior planning plan, it is necessary to consider too much when the chamfering process is attributed to unimportant feature processing, allowing the computer to solve the problem. For most chamfer, a ball head and rounded milling cutter can be used and 3D programmed cutting methods can be used. In this way, the computer can complete all considerations without worrying about burrs, bias tools or uneven matches. As long as it considers the chamfer milling cutter, the tool diameter is less than the inner diameter of the minimum. The deficiency of this method is that it is necessary to complete the entire chamfer cutting, the machining time is longer. Therefore, whenever possible, cutting amount is usually increased to improve processing efficiency.

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Carbide Introduction

Carbide Introduction

The cemented carbide is a main component with a high hardness refractory metal carbide (WC, TiC) micron powder, with cobalt (CO) or nickel (Ni), molybdenum (MO) is an adhesive, a powder metallurgy product which is sintered in a vacuum or hydrogen. Ivb, Vb, Vib metal carbide, nitride, boride, etc. The structural, characteristics, and applications of the rigid gold are described below with carbides. In a metal-type carbide formed of IVA, Va, VIA metal and carbon, due to small radius of carbon atoms, can be filled in the voids of the metal character and retain the metallic lattice form, forming a lifting solvent. Under suitable conditions, such solid solutions can continue to dissolve its composition elements until they are saturated. Thus, their composition can be varied within a certain range (for example, the composition of titanium titanide is changed between TiC0.5 to TiC), and the chemical formula does not meet the compliance rules. When the dissolved carbon content exceeds a certain limit (for example, TiC = 1), the lattice type will change, turn the original metal lattice to another form of metal lattice, at this time A renovated solvent is called a metallic replete. Metal type carbide, especially IVB, Vb, and Vib metal carbide has a melting point of 3273k, wherein the carbide, tantalum carbide is 4160k and 4150K, respectively, and is a high melting point in the currently known substance. Most carbides have a large hardness, their microscopic hardness is greater than 1800kg? Mm2 (micro-hardness is one of the hardness representations, mostly used in cemented carbide and hard compounds, micro hardness 1800kg? Mm2 equivalent to Mo's Diamond a hardness 9). Many carbides are not easy to decompose at high temperatures, and antioxidant capacity is strong than its components. Titanium carbide is well thermally stabilized in all carbides, is a very important metal carbide. However, in an oxidative atmosphere, all carbides are easily oxidized at high temperatures, which can be said that this is a large weakness of the carbide. In addition to carbon atoms, nitrogen atoms, boron atoms can also enter the gap of the metal lattice, forming a reinforcing solution. They are similar to the nature of the complex carbide, which can conduct electricity, heat transfer, high melting point, high hardness, and the brittleness is also large. The substrate of the cemented carbide consists of two parts. Part is hardened; the other part is bonding metal. The hardening phase is a carbide of the transition metal in the periodic table, such as tungsten carbide, titanium carbide, carbon tantalum, and its hardness is high, and the melting point is more than 2000 ° C, and some even over 4000 ° C. Further, the nitride, boride, and silicide of the transition metal also have a similar character, or may act as a hardening phase in a carbide. The presence of a hardening phase determines that the alloy has good hardness and wear resistance. Bond metals are typically ferrous metal, commonly used, cobalt and nickel. When a hard alloy is produced, the selected raw material powder particle size is between 1 to 2 microns, and the purity is high. The raw material is ingredient according to the specified composition, and the alcohol or other medium is added to the wet ball mill, so that they are fully mixed, pulverized, dried, sieved to add a type of molding agent such as wax or glue, and then dry, over The mixture is prepared. The mixture is then granulated, the mixture is heated to approaching the bonding metal melting point (1300 to 1500 ° C), and the hardening phase forms an eutectic alloy with the bonded metal. After cooling, the hardening phase is distributed in the grid composed of bonded metal, closely together, forming a firm whole. The hardness of the hard alloy depends on the hardening phase content and the grain particle size, that is, the higher the hardening phase content, the finer the grains, the greater the hardness. The toughness of the cemented carbide is determined by bonding metal, the higher the bond metal content, the greater the strength of the bending. In 1923, Germany's Schletel added 10% to 20% of the cobalt to binder, invented the new alloy degree of tungsten carbide and cobalt, which is the world's artificial production. First carbide. When cutting steel with this alloy, the blade will be worn quickly, and even the cutting cracked. In 1929, Schwarzkov added a quantity of tungsten carbide and tetanned carbide in the original ingredient, and improved the performance of the tool cutting steel. This is another achievement in the history of hard alloy development. The cemented carbide has a series of excellent performance, heat resistance, strength and toughness, heat resistance, corrosion resistance, etc., especially its high hardness and wear resistance, even at temperatures at 500 ° C. There is still a high hardness at 1000 ° C. Cemented carbide is widely used as tool materials such as car kni

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Tools and Production Efficiency

Tools and Production Efficiency

Modern tools are to achieve efficiency, high precision, high reliability, dedication, can provide complete set of processing solutions based on processing characteristics and workpieces, which are popular practices for international tool companies. But now, it is just selling products. This concept is to change, good tools, and enterprises will even help prepare a process after clarifying the user's processing requirements, and improve how much efficiency will be improved. Comparison, and the user is willing to accept such a paid service, and this is also another profit growth point of the company. The machine tool itself does not bring value, so it is necessary to help users improve the usage rate of the machine, and a common problem currently exist is a problem that the machine's utilization rate is low, so how to make the machine tool to achieve its efficiency, and the tool As an executor of machine tool processing tasks, if the tool level is not going, the high speed is also unable to function, so the tool management service came into being.

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How to Choose a CNC Tool

How to Choose a CNC Tool

On the processed, all tools are all preserved in the knife library, and the corresponding tool change operation is performed by the selection knife of the CNC program and the tooling instruction. Use the corresponding standard shank for the machine tool system specification so that the CNC machining tool can be quickly and accurately mounted to the machine spindle or return to the knife library. The programmer should be able to understand the structure size, adjustment method, and adjustment range of the tool holder used to ensure the radial and axial dimensions of the tool when programming, and arrange the order of the tool reasonably. 1. Factors affecting CNC tool selection When choosing the type and specification of the tool, it mainly considers the following factors: (1) Production properties Here, the production property refers to the batch size of the parts, mainly considering the effects of tool selection. For example, in a large number of production, special tools may be costly, and when single or small batches are produced, choose a standard tool more suitable for some. (2) Machine Type The effect of CNC machine tools used in this process pair selected tool type (drill, car blade or milling cutter). Under the conditions that can ensure the rigidity of the workpiece system and the tool system, high productivity tools, such as high-speed cutting, and large feed pulses. (3) CNC machining plan Different CNC machining programs can use different types of tools. For example, the machining of the aperture can be drilled with a drill and a reagent, or a drill and a boring knife can be processed.

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Summary With the Material of Alloy Drill

Summary With the Material of Alloy Drill

The main component of the alloy drill bit is tungsten carbide, cobalt, and the like. The alloy drill bit generally refers to a hard alloy drill bit, a score, welded, an invertable blade, and a replaceable head. The main ingredient of the cemented carbide is tungsten carbide, cobalt, etc., the hardness is high, which is generally higher than HRC90 degrees, and is more applicable in bulk processing and difficulty in hard work. The alloy drill bit in the market is generally the overall drill bit of tungsten steel, and the high-quality alloy drill bit will take coating treatment, such as aluminum nitride chromium (AlCrn) coating, the coating is a single layer coating, thickness 4 μm, Micro-hardness is 3200HV, the friction coefficient of 0.35, and the thermal stability is 00 degrees Celsius. After the coating, the drill bit is yellow on gray. After coating, alloy drills can process low alloy steel and high strength steel. High hard steel can reach 54 hrc.

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What is The Application Characteristics

What is The Application Characteristics

During the actual application, we understand that the cemented carbide drill bit is a complete hard alloy bar. It has a wide range of versatility, high strength, high hardness performance, fast cutting speed, abrasion resistance, and good red hardness, suitable for processing parts of various materials. The cemented carbide drill bit can be divided into internal cooling and outer type. I. Features and Use () The rigidity is good, the strength is high, and it is easy to obtain higher drilling accuracy. (2) It can be suitable for drilling of more complex materials, which can choose higher cutting speed. (3) Effective reduction of the strapping and has good wear resistance. (4) Multi-layer geometric cutting edge, improved drashing resistance, maintain less cutting resistance. (5) Except for commonly used right-angle handle, there are a variety of handle types, suitable for a variety of drills, drilling machines. (6) Compared to the transpositional blade drill bit, the overall hard alloy drill bit can be worn by 7 to 0 times. Second. Hard alloy drill bit selection points: Before the processing parts, the material is different from the material of the part (P, M, K, S, N, etc.); second, according to the size and depth of the drilling hole, Select different drills and structures, such as two blade, three blade, X, etc .;, different cutting parameters are selected according to equipment and product precision.

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