Honing mandrel construction

A honing mandrel comprising an elongated mandrel body having a central longitudinal axis extending between opposite ends thereof, a passage extending through the mandrel body between the opposite ends and a radial opening communicating with the passage at an intermediate location along the length thereof,

• an abrasive assembly positioned in the radial opening for movement in a radial direction, said abrasive assembly having a radial outermost surface formed of an abrasive material and a radial inner portion having axial spaced inner surfaces formed thereon, each of said inner surfaces being oriented at an acute angular orientation relative to the axis of the mandrel body and having a width measured in a direction perpendicular to said radial direction and said longitudinal axis, wherein the sum of the widths of said inner surfaces is at least equal to the width of the abrasive assembly,
• cooperatively engageable means on the abrasive assembly and on the mandrel body to prevent relative axial movement therebetween,
• an operator member formed of cast metal positioned in the passage extending through the mandrel body for axial movement therein, said operator member having axially spaced wedge surface portions thereon acutely angularly oriented relative to the axis of the mandrel body to be in surface-to-surface engagement respectively with the acutely angularly oriented inner surfaces on the abrasive assembly whereby axial movements of the operator member in one direction in the passage produces outward radial movement of the abrasive assembly in the radial opening, each of said wedge surface portions having a width corresponding approximately to the width of the respective inner surface portion in surface-to-surface engagement therewith, and
• other cooperatively engageable means on the abrasive assembly and on the operator member for moving the abrasive assembly radially inwardly in the radial opening when the operator member is moved axially in the passage in a direction opposite from said one direction.

In a honing mandrel having an elongated member with a passageway extending along the length thereof, the elongated member being mountable for rotation about a central longitudinal axis thereof, a stone assembly positioned in the passageway and having axially spaced radially inwardly facing surface portions acutely angularly oriented relative to the axis of the mandrel, and adjustment means including a wedge member formed of cast metal positioned in the passageway, the stone assembly and the wedge member having adjacent side surfaces and the wedge member having a pair of axially spaced radially outwardly facing surfaces thereon acutely angularly oriented relative to the axis of rotation of the elongated member, the angularly oriented surfaces on the adjustment member and on the stone assembly being in surface-to-surface engagement such that axial movements of the wedge member in one direction in the passageway produces radial movement of the stone assembly in a radial outward direction, the improvement comprising the spaced radially inwardly facing surface portions of the stone assembly each having a width measured in a direction perpendicular to said radial direction and said longitudinal axis, wherein the sum of the widths of said inwardly facing surface portions is at least equal to the width of the stone assembly, and cooperatively engageable means on the adjacent side surfaces of the stone assembly and of the wedge member for positively radially retracting the stone assembly into the passageway in the elongated member when the wedge member is moved in a retracting direction which is opposite to the one direction in the passageway.

A honing mandrel comprising an elongated mandrel body having a central longitudinal axis of rotation, a passageway extending along the length of the mandrel body, said passageway having sides extending the length thereof and being open along one side thereof over the length of the mandrel body, an abrasive assembly positioned in the passageway, said abrasive assembly and said body having cooperatively engageable means to enable relative radial but not relative axial movement therebetween, said abrasive assembly having a radially outermost abrasive surface and axially spaced inner surfaces located radially inwardly of the outermost abrasive surface and acutely angularly oriented relative to the axis of the mandrel body, each of said inner surfaces having a width measured in a direction perpendicular to said radial direction and said longitudinal axis, wherein the sum of the widths of said inner surfaces is at least equal to the width of the abrasive assembly,

• an operator member formed of cast metal positioned in the passageway for axial movement therein, the cross-sectional size and shape of the abrasive assembly and of the operator member corresponding to the cross-sectional size and shape of the passageway along a portion of the length thereof, said operator member having axially spaced surface portions thereon acutely angularly oriented relative to the axis of the mandrel body in position to make slidable engagement with the respective inner surfaces on the abrasive assembly whereby axial movement of the operator member in one direction relative to the abrasive assembly will produce radial movement of the abrasive assembly in and outward radial direction, each of said axial spaced surface portions on the operator member having a width measured in a direction perpendicular to said radial direction and said longitudinal axis, wherein the sum of the widths of said axial spaced surface portions is at least equal to the width of the abrasive assembly,
• cooperatively engageable means on the mandrel body and on the operator member to permit relative axial but not relative radial movement therebetween including means on the mandrel body extending sidewardly in the passageway relative to the axis thereof and groove means on the operator member engageable with the sidewardly extending means in the passageway, and
• other cooperatively engageable means on the abrasive assembly and on said operator member capable of producing radial movement of the abrasive assembly in an inward radial direction when the operator member is moved in an axial direction opposite from said one axial direction relative to the abrasive assembly.

A honing mandrel comprising an elongated mandrel body having a central longitudinal axis of rotation and a passageway extending along the length thereof, an opening in one side of said mandrel body extending radially into the passageway, an abrasive assembly positioned in the opening for movement in a radial direction, the abrasive assembly having a radially outermost abrasive surface and inner surfaces located radially inwardly of said abrasive surface and acutely angularly oriented relative to the central longitudinal axis, each of said inner surfaces having a width measured in a direction perpendicular to said radial direction and said longitudinal axis, wherein the sum of the widths of said inner surfaces is at least equal to the width of the abrasive assembly,

• cooperatively engageable means on the mandrel body and on the abrasive assembly to enable relative radial but not relative axial moment therebetween,
• an operator member formed of cast metal positioned in the passageway for axial movement therein, said operator member having a cross-sectional shape and size over a portion of the length thereof that substantially conforms to the cross-sectional shape and size of the passageway in the body, said operator member having axially spaced surface portions acutely angularly oriented relative to the axis of the mandrel body in position to make slidable engagement with respective inner surfaces on the abrasive assembly, each of said surface portions having a width measured in a direction perpendicular to said radial direction and said longitudinal axis, wherein the sum of the widths of said surface portions is substantially equal to the width of the abrasive assembly, axial movement of the operator member in one direction relative to the abrasive assembly producing radial movement of the abrasive assembly in a radial outward direction, and
• cooperatively engageable means on the abrasive assembly and on the operator member capable of producing radial movement of the abrasive assembly in an inward radial direction when the operator member is moved in an axial direction opposite from said one axial direction relative to the abrasive assembly.