Other considerations miniature bearing grinding machine

4. Other considerations, 1) Wear problem any grinding wheel has a certain use wear, wear reaches a certain point you must replace a new sand wheel. Can't in order to save materials, super wear requires the use of, this is a kind of highly safety violations. General provisions, when the diameter of the second round of wear and tear to the bigger than chuck diameter 10 mm should replace the new grinding wheel. ( 2) Bring forth a new valid question from the warehouse is not necessarily qualified grinding wheel grinding wheel, even from the manufacturers to buy a new grinding wheel is not necessarily qualified grinding wheel. The term of validity of any grinding wheel has its certain used within the valid term, it is qualified grinding wheel; Over the period of validity is used, is not necessarily a qualified grinding wheel. Rules: 'grinding wheel should be used within the period of validity, resin and rubber bonded grinding wheel storage must by turning test a year later, eligible for use' ( 3) Quality problem in use process, if it is found that grinding crack of partial, should immediately stop using, replace the new grinding wheel, so as to avoid injury accident caused by grinding wheel broken. ( 4) Stop of grinding wheel grinding wheel must be idle for three minutes before shutdown, using centrifugal force to keep in the inside of the grinding wheel cutting fluid with dry, then stop the machine, shut off the power. 1. 3. 3 the balance of grinding wheel 1. The cause of the grinding wheel unbalance grinding wheel unbalance is caused by the gravity of grinding wheel and the rotating axis misalignment. The cause of grinding wheel unbalance basically has the following several kinds of (1) all parts of the grinding wheel itself uneven density (2) the shape of grinding wheel is not correct, shape asymmetry. (3) grinding wheel is installed on the flange with unbalanced eccentric wheel rotating at high speed will produce vibration and impact on processing quality and precision grinding machine, serious when still can cause damage to the bed and grinding wheel broken 2. Grinding wheel balance method ( 1) The second round of static balance as shown in figure 1. 16, static balance is after grinding wheel installed flange, put special static balancing shelf, using balance weight to adjust the position of the grinding wheel unbalance to balance. Purpose in order to eliminate the unbalanced factor of grinding wheel due to the barycenter offset adjusting static balancing methods as follows to find points down the wheel's center of gravity and A. At point A of the same diameter corresponding points make A mark B. Join the counterweight unchanged in the position of A and B two points. Add the balance block D, E and still make A and B point location is changeless, under any change can be on shift D, E, A, B two returned to in situ. Has balance around the grinding wheel, grinding wheel turning 90, such as imbalance, D, E and at the same time to A or B point move until A and B two points balance. So adjust the grinding wheel stability in any orientation