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Anatomy and preventive measures for ferrule grinding burns (2)
Source: Bearing network time: 2013-02-13
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a. The grinding wheel shaft is swayed; when the boring increases, the grinding amount causes burns. At this moment, it is necessary to tighten the wheel axle bearing or replace the bearing.
b. The disk of the workbench jumps or the rotation speed is not uniform; when the grinding amount is increased, the amount of grinding causes burns, and various components of the disk reducer, such as a worm gear, a worm, etc., need to be repaired, and the wear parts are replaced.
c. The magnetic force of the disk is small or broken; this will cause the workpiece to slip on the disk, causing burns and overhaul; the charging and demagnetizing lines should be adjusted.
d. The reciprocating stroke is not well positioned; if the stroke switch is not well touched or the reciprocating reducer assembly is worn; the worm gear and the worm tissue cannot be self-locking; the slamming, impacting and beating will cause burns in the carriage. After the double-face surface grinder such as M7675 series The following causes of the grinding machine will form a burn:
â—The feeding guide is worn; it is not straight; the feeding is uneven,
â— The guide plate is not parallel to the working surface of the grinding wheel.
â—The entrance of the grinding wheel end face is too small, so that the outer edge of the grinding wheel bears most of the cutting amount, and the grinding wheel becomes dull.
2 Cylindrical grinding of centerless cylindrical grinding machines such as M1083; usually have the following special conditions:
â—Infeeding the plate, punching, and increasing the amount of the tool, causing burns. It is necessary to adjust the wedge iron, remove the smooth plate or scrape the guide plate, overhaul the lead screw, and the silk nut; replace the wear parts.
â—The spark is not adjusted properly; too much grinding at the entrance; the front end is easy to burn; if the grinding is too much at the exit, the workpiece has a spiral mark.
â— The feed amount is too large or the electrical components are badly touched; the thermal relay will trip in the workpiece; and the active stop will be stopped; at this moment, the knife should be quickly retracted.
3 The inner diameter grinding process has a long touch arc between the grinding wheel and the workpiece during grinding; the heat of the attack is more, the coolant is not easy to hit the grinding area, the heat dissipation condition is poor, the wedge is difficult; the plug is easy to plug; these are The reason for the formation of high temperature for grinding; therefore, the coolant needs to be sufficient and useful; the grinding wheel should be repaired in time. Like the MZ208 series internal grinding machine; the grinding wheel must be repaired to compensate the organization; or it will be repaired due to the grinding surface. Because such machine tool compensation organization is done by roller friction transmission; there is no guarantee that the same compensation will be obtained every time; the current situation is to change the organization from roller friction to stepper motor organization.
4-channel grinding on the oscillating head; its grinding wheel is more self-sharpening; usually with a rubber bond grinding wheel; because at the high temperature of the grinding area; the rubber bond is easy to age and become brittle; the blunt abrasive grains are swaying It is easy to fall; therefore; the grinding wheel should always be sharp. For the cutting and grinding; its grinding wheel adheres to the shape of the function; it usually uses a harder grinding wheel; its self-sharpness is poor; so it is often useful to trim; The coolant should be abundant. It is the most likely process to cause burns; the cooling is particularly important, otherwise the rotation speed of the grinding wheel is different; the wear of the grinding wheel is uneven; the dressing is required to be good; the rotation speed of the corrector Uniform, stable, and compensated organization should be firm; the diamond should be sharp; the tip of the pen should be 1~2mm lower than the middle of the grinding wheel; otherwise it will easily cause oscillation during trimming; affecting the trimming effect.
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