User manual 3M 02-2004 REMOVING TURBINE BLADE DEFECTS SMALL DIA CONTACT WHEEL

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Manual abstract: user guide 3M 02-2004 REMOVING TURBINE BLADE DEFECTS SMALL DIA CONTACT WHEEL

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[. . . ] Application Profile Market: Turbine Blades (Multi-segment Vanes) Application Description: Removing casting scale, milling lines and minor defects using small diameter contact wheels 241568 Key Application Requirements Remove casting scale, milling lines and minor surface defects from nickel alloy or titanium cast multi-segment vanes, while leaving a consistent, high quality finish. PRODUCT 3MTM TrizactTM CF Belt, grades A300 ­ A65 Scotch-BriteTM Surface Conditioning Belt, A MED or A VFN Products Replaced Competitive J weight conventional coated abrasive belts in grades P80 ­ P240. Advantages/Benefits To Customer Consistent, improved finishes 3M Trizact CF Belt features a macroreplicated matrix of resin and aluminum oxide mineral on a flexible X weight cloth backing. The structure is designed to break down under moderate to high grinding pressure, exposing fresh mineral to the grinding/polishing interface. [. . . ] Historically conventional coated abrasive belts are used to remove casting scale, milling lines and minor surface defects and to provide the required surface finish on the airfoils. The abrasive sequence depends on the casting quality and the required finish specifications (typically in the range of 20­25 micro inches), but a common starting point is a J weight belt in grade P80, often followed by P180 and then P240. As a last step Scotch-BriteTM Surface Conditioning Belt in grade A MED is used to blend the airfoils to create a uniform finish. Using 3MTM TrizactTM CF Belt for defect removal and scratch refinement as necessary will provide longer life and a high quality, more consistent finish than conventional coated abrasives. Recommended Trizact CF Process Application Casting scale, milling line and minor defect removal Coarse scratch refinement Scratch refinement Scratch refinement Overall blending of airfoil Recommended Trizact CF Sequence A300 A160 or A100 A65 Scotch-BriteTM Surface Conditioning Belt A MED or A VFN Competitive Coated Abrasive J weight P80 J weight P180 J weight P240 A MED grade non-woven belt Recommended Belt Speeds High nickel alloys: 6, 000 ­ 7, 000 SFPM Titanium: 2, 500 ­ 3, 500 SFPM Tools One issue with processing these vanes is the limited space between the airfoils. This process requires a tool with a narrow arm, a small diameter contact wheel and an abrasive t. Common tools for this application include portable file belt tools or backstands with a ¼" diameter steel contact wheel. Examples: Dynabrade® DynafileTM Abrasive Belt Machine (air powered), model #14000 Dynabrade® Versatility Grinder (electric powered), model #64904 or #64903 Stephan Bader Company BIII Bench Model Stephan Bader Company Space Saver Floor Mount Backstand Market: Turbine Blades (Multi-segment Vanes) Application Description: Removing casting scale, milling lines and minor defects using small diameter contact wheels page 3 Related Products If finer finishes are required: 3MTM TrizactTM 237EA in grades A30 ­ A16 Related Applications "Turbine Blades: Removing casting scale, milling lines and minor defects using a backstand" Safety Information Always read and follow all safety information included with the product. Do not exceed maximum operating RPM's. Follow safety operation procedures posted in work areas. To request additional product information or to arrange for sales assistance, call 1-800-362-3550. Address correspondence to: 3M Industrial Business Customer Response Center, Building 21-1W-10, 900 Bush Avenue, St. All statements, technical information and recommendations contained in this document are based upon tests or experience that 3M believes are reliable. [. . . ] Except where prohibited by law, 3M and seller will not be liable for any loss or damage arising from the 3M product, whether direct, indirect, special, incidental, or consequential, regardless of the legal theory asserted, including warranty, contract, negligence, or strict liability. For Additional Information Product Use Warranty and Limited Remedy Limitation of Liability Trizact and Scotch-Brite are trademarks of 3M. Dynabrade and Dynafile are trademarks of Dynabrade Corporation. Industrial Business Building 21-1W-10, 900 Bush Avenue St. [. . . ]

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