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Hardware Network HC: Grinding is used in the grinder Grinding wheel As cutting Tools On the workpiece machining method. The method is characterized by:
(1) As the grinding wheel grit their high hardness and heat resistance, it can be processed very hard grinding materials such as hardened steel, carbide and so on.
(2) grinding wheel and grinding characteristics of the system can determine the uniformity of the micro-cutting for the general ap = 0.001 ~ 0.005mm; grinding speed is high, generally up to v = 30 ~ 50m / s; grinding stiffness good; with hydraulic drive, so can the economy grinding to obtain a high precision (IT6 ~ IT5) and small surface roughness (Ra = 0.8 ~ 0.2 m). Parts finishing grinding is one of the main methods.
(3) because of strong friction, Ershi high grinding zone temperature. This will cause the stress and deformation of the workpiece, causing the surface burns. So a lot of grinding coolant must be injected to reduce the grinding temperature. Coolant and lubrication can also play the role of Chip.
(4) large radial force when grinding. This will result in machine tools? Wheel? Workpiece system flexibility concessions, the actual depth of cut less than the nominal depth of cut. So grinding will be complete, should not feed for light grinding to remove the error.
(5) after blunt abrasive grinding, grinding force also increased, resulting in particle fragmentation or loss, re-exposed sharp edge, this feature is called "self-sharpening." Since Sharp makes grinding a certain period of time to normal, but over a certain time after work, man should be trimmed so as not to cause the grinding force increased vibration, noise and damage the workpiece surface quality.
Wheel The cutting wheel is grinding
Tool , Which consists of many small, hard abrasive and adhesive binder made of porous objects. Abrasive cutting directly responsible for the work, must be sharp and have high hardness, heat resistance and a certain toughness. Common Abrasive With aluminum oxide (also known as corundum) and two silicon carbide. Alumina abrasive type, high hardness, good toughness, suitable for grinding steel material. Type silicon carbide abrasive hardness higher and more sharp, good thermal conductivity, but more brittle for grinding cast iron and hard alloy.
Same abrasive grinding wheel, different because of its thickness, surface roughness of workpiece after processing and processing efficiency is not the same as coarse grit for rough grinding, fine abrasive for grinding, the coarser abrasive particle size smaller number.
Bond from bonding abrasive effect. Commonly used is bond, followed by the resin bond. Binder choice of materials with different impact wheel corrosion resistance, strength, heat resistance and toughness.
Abrasive bonded more firmly, the more difficult from a wheel fell off on the hardness of said grinding wheel, grinding wheel hardness means that the surface of the abrasive wheel under loads off the degree of difficulty. Easy to fall off as soft, otherwise known as hard. Hardness and abrasive grinding wheel hardness are two different concepts. By grinding the workpiece surface is relatively soft, abrasive the edge (edges) on easy to wear, so the time can be abrasive to use longer, more solid bond that is optional wheel (wheel hardness higher). Conversely, low hardness for grinding wheel hardness of workpiece.
Wheel at high speed under the conditions of work, in order to ensure the safety inspection before the installation, there should be no cracks and other defects; order to wheel and steady, dynamic balance test should be carried out before use.
Wheel working after a certain time, the surface debris to plug the gap will be, will be blunt abrasive acute angle, the geometry of the original will be distorted. Must be repaired to restore the cutting ability and the correct geometry. Wheel Diamond Pen trim.
Grinding surface grinding machine structure and movement
Many different types of grinding machines, mainly surface grinder, cylindrical grinder, internal grinder, universal cylindrical grinding machine (which can grind the hole), Gear Grinding, thread grinding machine, rail grinding, centerless grinder (grinding cylindrical) and tool grinder I am China Manufacturers writer, reports some information about big wheels for kids , magic kits for kids.
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