Grinding wheel installation and removal

In grinding processing, the installation of the grinding wheel is a very important work, the installation of proficiency and quality, directly affects the production efficiency and machining quality. Grinding wheel for grinding wheel work speed is high, the nature of the brittle, such as the installation is not correct, can make the grinding wheel unbalance caused by vibration, affects the processing quality and accuracy of machine tools, serious can lead to fly out of the grinding wheel rupture and cause serious accidents. Figure 1 dozen grinder, grinding wheel installation method of grinding wheel installation method is more, due to the different size and shape grinding wheel, its installation method is also different, generally used the method of grinding wheel has the steps the clamping flange plate, flat and long axis clamping flange clamp and sulfur binding clamping (such as As shown in figure 2) 。 Figure 2 wheel installation method 1, figure 2 a) ,b) Said by steps the clamping flange plate grinding wheel, suitable for large aperture flat wheel. Grinding wheel with nuts or a few screws first clamping between the two flanges and then loaded on the grinding wheel axis of the cone, with a nut and tight. 2, figure 2 c) d) Said directly by plane flange and gasket with nut grinding wheel clamping on the grinding wheel spindle or extension shaft, applicable to the diameter is not too big wheel and cup wheel etc. 3, figure 2 e) f) ,g) According to circular grinding with a grinding wheel within several clamping method. Usually put on the grinding wheel spindle with long shaft, and then put the grinding wheel loaded on the extension shaft. Figure 2 g) Is the grinding wheel with adhesive glue on fixed in extension, and then loaded on the grinding wheel main pumping method, suitable for small diameter ( 20 mm below) The grinding wheel. The used binder for copper oxide and phosphoric acid. When bonding adhesive first tune into a paste, then note one wheel hole, and then plug after long axis, after natural drying or drying copper oxide scleroma. Keep the grinding wheel spindle insert people to pay attention to the concentric and vertical, lest increase loss of grinding wheel dressing and occur when using fluttering, affect the quality of grinding. 4, figure 2 h) Said vertical shaft Jane wheel clamping methods on surface grinding machine, grinding wheel with sulfur in the flange plate. 2, install and remove the grinding wheel should pay attention to the following matters: ( 1) Grinding wheel before the installation, should check grinding wheel crack. The commonly used method is to hang wheel, knock gently with hammer with wooden handle wheel profile, such as ringing sound, grinding wheel, no crack, such as the sound of 'dumb' sound, then grinding wheel have crack, must change, has a crack of the grinding wheel is absolutely not allowed to use. To be sure, in addition to the ceramic binder grinding wheel, other bond grinding wheel, although there is no crack, but the voice of the enemy when you also heavy turbidity, oil or other water impregnated ceramic binder grinding wheel has a similar situation, for the grinding wheel, the test must be done carefully please experienced teacher. ( 2) Grinding wheel inner hole and long axis, flange, etc. , shall have the appropriate clearance ( Table 1. ) When, in order to avoid the grinding heat expansion and make the grinding wheel burst. If the grinding wheel diameter is too small and make the fit too tight, hard pressed it should never be allowed in, and must be installed after the aperture expanding again, in order to avoid the grinding wheel at work because of its with big expansion force fracture. Fitting clearance but also cannot too much, otherwise the grinding wheel are prone to eccentric, to lose balance, vibration in the grinding wheel spindle, not only affect the machining surface roughness, but also may cause broken grinding wheel. If found the gap is too big, can be in the long axis, flange evenly on the package of mating surfaces, such as a layer of thin sheet. ( 3) Clamping wheel flange plate, the diameter of the two flanges must be equal, their size should not be less than a third of the grinding wheel diameter, flange end face on the center of the part to dig deeply within 2 ~ 3 mm ring groove, make its only a circle to the outer ring surface contact with the grinding wheel, in order to make sure the clamping stable, at the same time, contact with the grinding wheel flange plate face must be straight. Use different diameter or distort the uneven flange, can make grinding wheel by bending stress, may cause wheel fracture. ( 4) Between the flanges, gaskets and grinding wheel face, should be put on the cardboard, oil resistant rubber village mat made of elastic material, such as uniform compression flange and gasket stress distribution, so as not to damage the grinding wheel. The thickness of the liner can be 0. Between 5 ~ 1 mm, its diameter should be slightly larger than the diameter of the flange or washer. ( 5) When fastening emery wheel flange, nut cannot twist too tight, otherwise the grinding wheel can rupture. When a few screw fastening flange, should press diagonal sequence points several times to gradually tighten the screws. If order, along the circumference of a circle to tighten the screws, or a screw, will make the wheel bearing uneven and may fracture. Tighten the screws, can only use standard wrench, and are not allowed to adopt the method of extension wrench or to knock to maximize their tight force. ( 6) The grinding wheel flange when loaded on the grinding machine spindle, must take the taper hole of flange plate and the cone on the grinding machine spindle wipe very clean, to ensure the concentricity of grinding wheel and the main uranium. ( 7) New grinding wheel after balancing the loaded on the grinding machine for the first time, must have a shield under the condition of idling 1 ~ 3 min, at this time the operator should stand in the side of the grinding wheel, in case of an accident. ( 8) Remove the grinding wheel ( Including removed from the grinding machine for grinding wheel flange, long axis, and remove the wheel from the long axis of the flange,) , must pay attention to don't put the gland nut screw direction wrong, otherwise will increase the difficulty of disassembly work, and may even damage the machine parts. During work to prevent the grinding wheel nut loosen automatically, its spiral direction is such regulations: against the wheel rotation direction turn the nut, nut tight; Vice loosen. ( 9) Either way to install or remove the grinding wheel, operation to should take put down gently, in order to avoid the grinding wheel vibration generated by internal injuries or knock against.