Method of grinding an indexable insert and grinding wheel for carrying out the grinding method

Method of grinding an indexable insert having narrow sides contiguous with first and second wide sides, comprising moving the narrow sides along a circularly contoured surface of a rotating grinding wheel whereby the narrow, sides are ground by the grinding wheel, wherein

• movements (a), (b) and (c) as follows are coordinated with respect to each other:
• (a) the indexable insert is rotated about a rotational axis which is substantially perpendicular to a plane of symmetry of the indexable insert;
• (b) a grinding spindle that carries and rotates the grinding wheel and the rotational axis of the indexable insert are displaced relative to each other in two displacement axes that are perpendicular to each other, the displacement axes and the rotational axis of the indexable insert being in parallel planes or the same plane;
• and
• (c) the grinding spindle and the indexable insert are pivoted relative to each other about a pivot axis that is perpendicular to the plane or planes in which the displacement axes and the rotational axis are located;
• the grinding is longitudinal, wherein the circularly contoured circumferential surface of the rotating grinding wheel and the indexable insert are guided relative to each other so that the circularly contoured circumferential surface of the grinding wheel traverses the narrow sides of the indexable insert beginning at the first wide side to the second wide side;
• and
• during the longitudinal grinding a forward-tapering leading area of the grinding wheel rough grinds the narrow sides of the indexable insert and a cylindrically shaped trailing area of the grinding wheel, which is annexed to the leading area and is disposed behind the leading area during the longitudinal grinding, linearly contacts the narrow sides thereby to finish grind the narrow sides.

Method of grinding an indexable insert having narrow sides contiguous with first and second wide sides, comprising moving the narrow sides along a circularly contoured surface of a rotating grinding wheel whereby the narrow, sides are ground by the grinding wheel, wherein

• movements (a), (b) and (c) as follows are coordinated with respect to each other:
• (a) the indexable insert is rotated about a rotational axis which is substantially perpendicular to a plane of symmetry of the indexable insert;
• (b) a grinding spindle that carries and rotates the grinding wheel and the rotational axis of the indexable insert are displaced relative to each other in two displacement axes that are perpendicular to each other, the displacement axes and the rotational axis of the indexable insert being in parallel planes or the same plane;
• and
• (c) the grinding spindle and the indexable insert are pivoted relative to each other about a pivot axis that is perpendicular to the plane or planes in which the displacement axes and the rotational axis are located;
• the grinding is longitudinal, wherein the circularly contoured circumferential surface of the rotating grinding wheel and the indexable insert are guided relative to each other so that the circularly contoured circumferential surface of the grinding wheel traverses the narrow sides of the indexable insert beginning at the first wide side to the second wide side;
• and
• during the longitudinal grinding a forward-tapering leading area of the grinding wheel rough grinds the narrow sides of the indexable insert and the grinding spindle and the indexable insert are pivoted relative to each other so that the leading area forms a lead angle with the narrow sides of the indexable insert and a trailing area of the grinding wheel, which is annexed to the leading area at a maximum diameter of the leading area and is cylindrical or tapers, beginning at the maximum diameter, toward a trailing end of the grinding wheel, forms a relief angle with the narrow sides of the indexable insert so that point grinding contact occurs between the maximum diameter of the grinding wheel and the narrow sides of the indexable insert.

Method of grinding an indexable insert having narrow sides contiguous with first and second wide sides, comprising moving the narrow sides along a circularly contoured surface of a rotating grinding wheel whereby the narrow sides are ground by the grinding wheel, wherein

• movements (a), (b) and (c) as follows are coordinated with respect to each other:
• (a) the indexable insert is rotated about a rotational axis which is substantially perpendicular to a plane of symmetry of the indexable insert;
• (b) a grinding spindle that carries and rotates the grinding wheel and the rotational axis of the indexable insert are displaced relative to each other in two displacement axes that are perpendicular to each other, the displacement axes and the rotational axis of the indexable insert being in parallel planes or the same plane;
• and
• (c) the grinding spindle and the indexable insert are pivoted relative to each other about a pivot axis that is perpendicular to the plane or planes in which the displacement axes and the rotational axis are located;
• the grinding is longitudinal, wherein the circularly contoured circumferential surface of the rotating grinding wheel and the indexable insert are guided relative to each other so that the circularly contoured circumferential surface of the grinding wheel traverses the narrow sides of the indexable insert beginning at the first wide side to the second wide side;
• and
• during the longitudinal grinding the grinding spindle and the indexable insert are pivoted relative to each other so that the circularly contoured surface of the grinding wheel, which surface tapers from a maximum diameter, forms a lead angle with the narrow sides of the indexable insert so that point grinding contact occurs between the maximum diameter of the grinding wheel and the indexable insert.

Method of grinding an indexable insert having narrow sides contiguous with first and second wide sides, comprising moving the narrow sides along a circularly contoured surface of each of two grinding wheels, wherein

• movements (a), (b) and (c) as follows are coordinated with respect to each other:
• (a) the indexable insert is rotated about a rotational axis which is substantially perpendicular to a plane of symmetry of the indexable insert;
• (b) two grinding spindles each of which carries and rotates a respective one of the grinding wheels and the rotational axis of the indexable insert are displaced relative to each other in two independent axes that are perpendicular to each other, the displacement axes and the rotational axis of the indexable insert being in parallel planes or the same plane;
• and
• (c) the grinding spindles and the indexable insert are pivoted relative to each other about a pivot axis that is perpendicular to the place or planes in which the displacement axes and the rotational axis are located;
• the grinding is longitudinal wherein the respective circumferentially contoured circumferential surface of each of the rotating grinding wheels and the indexable insert are guided relative to each other so that each of said grinding wheels traverses the narrow sides of the indexable insert beginning at the first wide side to the second wide side;
• and a first of the two grinding wheels is coated with abrasive particles of such nature and which are so bonded that the first grinding wheel effects rough grinding and the second of the two grinding is coated with abrasive particles of such nature and which are so bonded that the second grinding wheel effects finish grinding.

Method of grinding an indexable insert having narrow sides contiguous with first and second wide sides, wherein no re-entrant angle is being ground, comprising moving the narrow sides along a circularly contoured surface of a rotating grinding wheel whereby the narrow sides are ground by the grinding wheel, wherein

• movements (a) and (b) as follows are coordinated with respect to each other:
• (a) the indexable insert is rotated about a rotational axis which is substantially perpendicular to a plane of symmetry of the indexable insert;
• and
• (b) a grinding spindle that carries and rotates the grinding wheel and the rotational axis of the indexable insert are displaced relative to each other in two displacement axes that are perpendicular to each other, the displacement axes and the rotational axis of the indexable insert being in parallel planes or the same plane;
• the grinding is longitudinal, wherein the circularly contoured circumferential surface of the rotating grinding wheel and the indexable insert are guided relative to each other so that the circularly contoured circumferential surface of the grinding wheel traverses the narrow sides of the indexable insert beginning at the first wide side to the second wide side;
• and
• during the longitudinal grinding a forward-tapering leading area of the grinding wheel rough grinds the narrow sides of the indexable insert and a cylindrically shaped trailing area of the grinding wheel, which is annexed to the leading area and is disposed behind the leading area during the longitudinal grinding, linearly contacts the narrow sides thereby to finish grind the narrow sides.

Method of grinding an indexable insert having narrow sides contiguous with first and second wide sides, wherein no re-entrant angle is being ground, comprising moving the narrow sides along a circularly contoured surface of a rotating grinding wheel whereby the narrow sides are ground by the grinding wheel, wherein

• movements (a) and (b) as follows are coordinated with respect to each other:
• (a) the indexable insert is rotated about a rotational axis which is substantially perpendicular to a plane of symmetry of the indexable insert;
• and
• (b) a grinding spindle that carries and rotates the grinding wheel and the rotational axis of the indexable insert are displaced relative to each other in two displacement axes that are perpendicular to each other, the displacement axes and the rotational axis of the indexable insert being in parallel planes or the same plane;
• the grinding is longitudinal, wherein the circularly contoured circumferential surface of the rotating grinding wheel and the indexable insert are guided relative to each other so that the circularly contoured circumferential surface of the grinding wheel traverses the narrow sides of the indexable insert beginning at the first wide side to the second wide side;
• and
• during the longitudinal grinding a forward-tapering leading area of the grinding wheel rough grinds the narrow sides of the indexable insert and the grinding spindle and the indexable insert are pivoted relative to each other so that the leading area forms a lead angle with the narrow sides of the indexable insert and a trailing area of the grinding wheel, which is annexed to the leading area at a maximum diameter of the leading area and is cylindrical or tapers, beginning at the maximum diameter, toward a trailing end of the grinding wheel, forms a relief angle with the narrow sides of the indexable insert so that point grinding contact occurs between the maximum diameter of the grinding wheel and the narrow sides of the indexable insert.

Method of grinding an indexable insert having narrow sides contiguous with first and second wide sides, wherein no re-entrant angle is being ground comprising moving the narrow sides along a circularly contoured surface of a rotating grinding wheel whereby the narrow sides are ground by the grinding wheel, wherein

• movements (a) and (b) as follows are coordinated with respect to each other:
• (a) the indexable insert is rotated about a rotational axis which is substantially perpendicular to a plane of symmetry of the indexable insert;
• and
• (b) a grinding spindle that carries and rotates the grinding wheel and the rotational axis of the indexable insert are displaced relative to each other in two displacement axes that are perpendicular to each other, the displacement axes and the rotational axis of the indexable insert being in parallel planes or the same plane;
• the grinding is longitudinal, wherein the circularly contoured circumferential surface of the rotating grinding wheel and the indexable insert are guided relative to each other so that the circularly contoured circumferential surface of the grinding wheel traverses the narrow sides of the indexable insert beginning at the first wide side to the second wide side;
• and
• during the longitudinal grinding the grinding spindle and the indexable insert are pivoted relative to each other so that the circularly contoured surface of the grinding wheel, which surface tapers from a maximum diameter, forms a lead angle with the narrow sides of the indexable insert so that point grinding contact occurs between the maximum diameter of the grinding wheel and the indexable insert.

Method of grinding an indexable insert having narrow sides contiguous with first and second wide sides, wherein a no re-entrant angle is being ground comprising moving the narrow sides along a circularly contoured surface of each of two grinding wheels, wherein

• movements (a) and (b) as follows are coordinated with respect to each other:
• (a) the indexable insert is rotated about a rotational axis which is substantially perpendicular to a plane of symmetry of the indexable insert;
• and
• (b) two grinding spindles each of which carries and rotates a respective one of the grinding wheels and the rotational axis of the indexable insert are displaced relative to each other in two independent axes that are perpendicular to each other, the displacement axes and the rotational axis of the indexable insert being in parallel places or the same plane;
• the grinding is longitudinal wherein the respective circumferentially contoured circumferential surface of each of the rotating grinding wheels and the indexable insert are guided relative to each other so that each of said grinding wheels traverses the narrow sides of the indexable insert beginning at the first wide side to the second wide side;
• and a first of the two grinding wheels is coated with abrasive particles of such nature and which are so bonded that the first grinding wheel effects rough grinding and the second of the two grinding is coated with abrasive particles of such nature and which are so bonded that the second grinding wheel effects finish grinding.

A grinding wheel having a circularly contoured surface, the circularly contoured surface comprising

• first and second areas for leading and trailing, respectively, when the grinding wheel longitudinally grinds wherein
• the leading area tapers from a greatest diameter of the grinding wheel toward a first lateral face of the grinding wheel,
• the trailing area begins at the greatest diameter of the grinding wheel and extends cylindrically or tapering toward a second lateral face of the grinding wheel,
• each of the grinding wheels comprises an abrasive layer comprising ceramically or metallically bonded diamond grains, and
• the abrasive layer in each of the leading and trailing areas is different from the other.