Troubleshooting Tips: Centerless Grinding Concave work (low center)`, Work guides on entrance and exit sides deflected toward the grinding wheel. Also see . Centerless grinders are the dependable workhorses of the manufacturing world. With regular maintenance and TLC, your centerless grinding. Achieving consistent and quality results from the centerless grinding process requires an understanding of the basic fundamentals. Most application problems .
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Eject work pieces as soon after sizing as possible. Copyright Midland Abrasives. Irregular scratches of various lengths and sizes due to dirty coolant. Work too high above centre. Dress wheel with slow traverse and light penetration. Clean work before grinding.
Centerless Grinding Adjustments
Pull up evenly on alternate bolts before cinching up. Make certain cap screws are tight in mount. Also, the same cause may produce a varied number of grinding problems.
Too great a difference in grain size between roughing and finishing wheels. Immediately upon receipt, all grinding wheels should be closely inspected for possible damage in transit. Irregular flats on in feed work pieces when work left between wheels too long.
Even fine spiral diamond lines Dress at slower traverse rate. Determine whether caused by type of wheel, centeless diamond, dirty or too strong a coolant. Tighten diamond holder clamping screw; griinding or replace diamond. Be certain all stations are kept properly lubricated. Work jammed into wheel causing excessive pressure.
Use a coarser grained wheel with more open bond to allow greater chip clearance. First pass should be a light cut with high spindle housing angle but slow regulating wheel speed. Cenetrless piece over size generallyor under size a few tenths of a thousandth. Rough grind with more and smaller cuts, or use harder wheel for roughing. Do not handle heavy wheels except with special lifting device. Cut back front of face of wheel troubleshooitng half of stock removal over 1″ distance for a six-inch wheel relatively more on wider wheels Increase or decrease successive traverse rates to break pattern of diamond lines.
Always balance wheel in following sequence:. Trooubleshooting not straightened sufficiently before grinding Make certain it is straightened on presses before grinding. Loss of cutting action. Inspect spindle and collet—remove burrs if present. Roughing wheel breaks down too fast.
Especially on tubing, pistons, etc. Make first cut light at high traverse rate to attain maximum straightening effect. When shoulder grinding if regulating wheel is forward of grinding wheel, it prevents grinding to shoulder and causes work to pick up or chatter.
Dress with sharp diamond at increased traverse rate. Wheel acts too hard indicated by: Tighten spindle nut and collet screws Loose spindle or regulating wheel bearings. Be certain to adjust size again. Have collet on bench.
High soda concentrations attack resinoid and shellac bonds. Barely contact wheel face at high spot—dress across face only, starting at an edge, do not start on face. If result is not a clear ping do not use wheel. Dress wheel more often.
Troubleshooting Tips: Centerless Grinding
When two are used constant soaking and drying out may eventually cause loosening of cap screws. When through feed grinding, make certain guides on regulating wheel side are parallel and even with wheel face. Diamond cracked or broken; replace. Flanges pulled up unevenly causing side strains on wheel.
Be sure gaskets troubleshoofing flanges are clean. Under each are listed probable causes, and under each cause, possible corrections. Wash wheel thoroughly with coolant after dressing. Avoid getting oil on wheel. Too heavy stock removal – particularly on in feed work.
Clean coolant tank and machine. Increase penetration of dressing diamond up to 0.