公开(公告)号：US20190126436A1

公开(公告)日：2019-05-02

申请号：US16095514

申请日：2017-04-17

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Fredrik Westberg ,  Andrea V. Kirschner ,  Josef Kofler

IPC: B24D3/28 ,  C09K3/14 ,  C08G8/10 ,  C08K7/00 ,  C08K3/22 ,  C08K3/36

Abstract: The invention relates to a resin bonded cut-off tool. The resin bonded cut-off tool comprises rod shaped sintered bauxite abrasives, wherein an amount of the rod shaped sintered bauxite abrasives is at least 10% to 90% by weight, based on 100% by weight of a Grinding Active Matrix (GAM) of the cut-off tool. The resin bonded cut-off tool comprises further a bonding agent in an amount of 10% to 40% by weight, based on 100% by weight of the GAM of the cut-off tool and fused and/or sintered abrasives in an amount sufficient to bring the GAM of the cut-off tool to 100% by weight.

公开(公告)号：US20230083287A1

公开(公告)日：2023-03-16

申请号：US17759726

申请日：2021-01-26

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Mayank Puri ,  Ethan J. Berg ,  Walter Flaschberger ,  Katja A. Bartsch ,  Andrea V. Kirschner ,  Brian D. Goers ,  Maiken Givot

IPC: C09G1/02 ,  B24D3/14

Abstract: A method for manufacturing a bonded abrasive article is presented. The method includes preparing a bondable abrasive composition including abrasive particles, a binder medium and an environmentally benign pore inducing material. The environmentally benign pore inducing material is nonflammable. The method also includes forming a precursor abrasive structure from the bondable abrasive composition. The method also includes removing the pore inducing material from the precursor abrasive structure to provide a porous precursor abrasive structure. The method also includes processing the porous precursor abrasive structure to provide a bonded abrasive article.

公开(公告)号：US20220055174A1

公开(公告)日：2022-02-24

申请号：US17309753

申请日：2019-12-16

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Maiken Givot ,  Michael Bartlmae ,  Andrea V. Kirschner ,  Erwin Ebner ,  Walter Flaschberger

IPC: B24B19/00 ,  B24D3/28 ,  B24D5/04 ,  B24D7/14 ,  B24D18/00

Abstract: The present disclosure provides improved rail grinding tools. Precision-shaped grains (PSGs), such as PSGs manufactured by 3M® company, provide significant performance improvement in resin-bond and vitrified bond grinding wheels. The use of PSG improves the performance of portable bonded wheels and precision grinding wheels, such as resin bond roll grinding wheels, flute grinding wheels, vitrified gear grinding wheels, cylindrical grinding wheels, and surface grinding wheels. The formation and composition of (e.g., monolithic) and multiple-layer PSG grinding tools described herein provides improved performance of rail grinding tools.