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Basic knowledge of metal working cutting tools by qilei
Angle in the choice of tools need to consider many factors, such as the workpiece material, tool material, processing and properties (rough, finish), etc., must be a reasonable choice under the circumstances. Generally speaking the tool angle is defined as the manufacture and measurement of the angle marked with the actual work, because the installation tool in different positions, and change the direction of cutting movement, the actual work of the angle and mark the point of view be different, but usually very little difference.
    Manufacturing tool materials must have high hardness and wear resistance of high temperature, the necessary bending strength, impact toughness, and chemical inertia, good technics (machining, forging and heat treatment, etc.), not easily deformed.
    Usually when high hardness, high wear resistance; bending strength, the impact toughness was also high. However, the higher the hardness, flexural strength and toughness lower. High-speed steel for high bending strength and toughness, and good machinability, the modern is still the most widely used tool material, followed by carbide.
    PCBN cutting for high hardness in hardened steel and hard cast iron, etc.; polycrystalline diamond suitable for cutting non-ferrous metals and alloys, plastics and glass, steel, etc.; carbon tool steel and alloy tool steel is only to rasp, die and tap tools.
    Carbide indexable inserts are now coated with a chemical vapor deposition titanium carbide, titanium nitride, aluminum oxide layer of the hard layer or composite hard. Being developed not only the physical vapor deposition can be used for carbide cutting tools can also be used for high-speed steel cutting tools such as drills, hobs, taps and milling cutters, etc.. Hard coatings as chemical diffusion and thermal conduction impeding the barrier, so that the tool wear in cutting slow down, life and non-coated blade coating increased compared to about 1 to 3 times.
    As the high temperature, high pressure, high speed, and work in the corrosive fluid medium parts, their application more and more difficult to machine materials, cutting the level of automation and precision have become increasingly demanding. To accommodate this situation, the direction of development tools will be the development and application of new cutting tool materials; the further development of vapor deposition coating technology tools, high-strength high-toughness matrix hardness of the coating deposited on a higher, better address tool material hardness and strength of the contradiction between; the further development of the structure of indexable cutting tools; to improve manufacturing precision cutting tools, reducing the difference between product quality and make optimal use of the tool.
    By cutting the blades of the Movement and the corresponding shape of the tool can be divided into three categories. Common tools, such as turning tools, planer, milling cutter (not including forming turning tools, forming and shaping cutter planer), boring cutters, drill bits, Core drills, reamers and saws, etc.; forming tool, such tool blade section has the same workpiece to be machined or near the same shape, such as forming turning tools, forming planer, shaping cutters, broaches, reamers and taper thread cutting tools, etc. all; develop into a processing tool is to use the gear generating method tooth surface or similar parts, such as hob, gear shaper cutters, shaving cutter, bevel gear and bevel gear planer milling cutter, etc..
    The structure of the various tools and work by clamping some parts. Tool clamping part of the overall structure and working parts are made in the cutter body; tipped cutting tools working part (cutter or razor blade) is mounted in the cutter body Xiang.
    Tool clamping part has two holes and petiole. Tool suite to rely on bore hole in the machine tool spindle or mandrel, with axial key or end key transmission torque, such as the cylindrical milling cutter, face milling and other nested.
    Petiole usually rectangular tool handles, cylindrical handle and handle three types of cone. Lathe tools, planer, etc. generally rectangular handle; tapered handle * taper axial thrust and transfer torque through friction; cylindrical shank twist drills are generally applicable to smaller, end mills and other cutting tools, cutting through clamping The torque generated by friction transfer. Petiole of the tool many use low-alloy steel shank, and the work of some of the high-speed steel made the butt of two parts.
    Part of the work tool is part of the generation and processing chips, including the blade, chip was broken rope structure or volume, chip removal, or capacity storage chip space, cutting fluid and other structural elements of the channel.
  Some work part is the cutting tool parts, such as turning tools, planer, boring tool and cutter and so on; some tools work part consists of the cutting part and the calibration part, such as drill bits, reaming drill, reamer, inner surface of the pull such as knives and tap. The role of cutting part of the chip with the blade removed, the calibration part of the role is to repair the surface optical processing has been cutting tool and guide.
    Work tool integral part of the structure, welding and mechanical clamping type of three. The whole structure is made in the cutter body cutting edge; welded structure is brazed to the steel blade knife body; mechanical clamping structure there are two types of knife film clip is solid in the cutter body, the other good brazing is to the knife blade clamping body. The general structure of carbide cutting tools made of welded or mechanical clamping structure; ceramic cutting tools are used clamping structure.
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115 Piece Titanium Nitride Coated M2 High Speed Steel Drill Bit Set #1611