Abstract: Methods, systems, and computer program products for direct assignment of physical devices to confidential virtual machines (VMs). At a first guest privilege context of a guest partition, a direct assignment of a physical device associated with a host computer system to the guest partition is identified. The guest partition includes the first guest privilege context and a second guest privilege context, which is restricted from accessing memory associated with the first guest privilege context. The guest partition corresponds to a confidential VM, such that a memory region associated with the guest partition is inaccessible to a host operating system. It is determined, based on a policy, that the physical device is allowed to be directly assigned to the guest partition. Communication between the physical device and the second guest privilege context is permitted, such as by exposing the physical device on a virtual bus and/or forwarding an interrupt.

Abstract: A minimum quantity lubrication (MQL) tool including a lance. The lance includes a passageway and an orifice. The passageway extends axially from a first end of the lance toward a second end of the lance and allows a lubricant supply to flow therein from the first end of the lance toward the second end of the lance. The first orifice extends radially through the lance at a location near the second end of the lance. The lubricant supply flowing through the passageway exits the orifice and is impinged upon by air flowing around the lance.

Abstract: A minimum quantity lubrication (MQL) tool including a lance. The lance includes a passageway and an orifice. The passageway extends axially from a first end of the lance toward a second end of the lance and allows a lubricant supply to flow therein from the first end of the lance toward the second end of the lance. The first orifice extends radially through the lance at a location near the second end of the lance. The lubricant supply flowing through the passageway exits the orifice and is impinged upon by air flowing around the lance.

Abstract: A tool holder for a minimum quantity lubrication (MQL) device includes a tool holder body, a mixing chamber, a gas passageway, and an oil passageway. The tool holder body is configured for rotation about an axis. The tool holder body has a proximal end configured to be coupled to a spindle of the MQL device and a distal end configured to support a cutting tool for rotation about the axis. The mixing chamber is disposed within the tool holder body. The gas passageway is within the tool holder body and in fluid communication with the mixing chamber. The oil passageway is within the tool holder body and in fluid communication with the mixing chamber. The oil passageway is separate from the gas passageway and configured to receive a liquid lubricant from an oil conduit of the spindle.

Abstract: A method for shaping a blind slot in a workpiece includes using a standard computer numerical controlled machine center to radially step a single slot broaching tool into a precursor slot in the workpiece for a predetermined distance to form a slot with a blind end. After the slot with the blind end is formed, the method includes rotating at least one of the workpiece and the single slot broaching tool and radially stepping the single slot broaching tool into another precursor slot for another predetermined distance to form another slot with another blind end in the workpiece. The another predetermined distance is the same as the predetermined distance, or in the alternative, the another predetermined distance is different than the predetermined distance.

Abstract: A method of priming a minimum quantity lubrication (MQL) tool includes determining a category of the tool, supplying a short-prime MQL dosage if the tool is a first category or if both a second category and lubricated within a first predetermined timeframe, and supplying a long-prime MQL dosage if the tool is the second category and has not been lubricated within the predetermined timeframe. The category is based on internal passage complexity of the tool.

Abstract: A cutting tool includes a body having a base and a cutting portion. The cutting portion defines a plurality of first edges and a plurality of second edges. The body defines a trunk passage, a plurality of first branch passages, and a plurality of first independent passages. Each of the first branch passages is open to the trunk passage and has an outlet open to an exterior of the cutting portion proximate to a corresponding one of the second edges. Each of the first independent passages is independent of the trunk passage and the first branch passages and has an outlet open to an exterior of the cutting portion proximate to a corresponding one of the first edges.

Abstract: A surface roughening tool includes a cylindrical body and at least one grooving blade outwardly radially projecting from the body and configured to form grooves and peaks into a surface. The surface roughening tool also includes at least one swaging blade outwardly radially projecting from the body and configured to deform the peaks. The at least one swaging blade is aligned with the at least one grooving blade along a circumference of the body.

Abstract: A method includes positioning a cylindrical tool having one or more rows of blades within a cylindrical bore having a surface, forming annular grooves and peaks into the surface with the grooving blades when the swaging blades are in the retracted position, and translating the swaging blades from the retracted position to the extended position to deform the peaks. The one or more rows of blades includes fixed grooving blades and translatable swaging blades having retracted and extended positions.

Abstract: A tool holder for a minimum quantity lubrication (MQL) device includes a tool holder body, a mixing chamber, a gas passageway, and an oil passageway. The tool holder body is configured for rotation about an axis. The tool holder body has a proximal end configured to be coupled to a spindle of the MQL device and a distal end configured to support a cutting tool for rotation about the axis. The mixing chamber is disposed within the tool holder body. The gas passageway is within the tool holder body and in fluid communication with the mixing chamber. The oil passageway is within the tool holder body and in fluid communication with the mixing chamber. The oil passageway is separate from the gas passageway and configured to receive a liquid lubricant from an oil conduit of the spindle.

Abstract: A method for shaping a blind slot in a workpiece includes using a standard computer numerical controlled machine center to radially step a single slot broaching tool into a precursor slot in the workpiece for a predetermined distance to form a slot with a blind end. After the slot with the blind end is formed, the method includes rotating at least one of the workpiece and the single slot broaching tool and radially stepping the single slot broaching tool into another precursor slot for another predetermined distance to form another slot with another blind end in the workpiece. The another predetermined distance is the same as the predetermined distance, or in the alternative, the another predetermined distance is different than the predetermined distance.

Abstract: A cutting tool includes a body having a base and a cutting portion. The cutting portion defines a plurality of first edges and a plurality of second edges. The body defines a trunk passage, a plurality of first branch passages, and a plurality of first independent passages. Each of the first branch passages is open to the trunk passage and has an outlet open to an exterior of the cutting portion proximate to a corresponding one of the second edges. Each of the first independent passages is independent of the trunk passage and the first branch passages and has an outlet open to an exterior of the cutting portion proximate to a corresponding one of the first edges.

Abstract: A machine assessment system of the present disclosure is for a machining tool including a spindle. The machine assessment system includes a calibrated spindle tool configured to couple to a distal end of the spindle, a displacement sensor configured to measure a performance characteristic of the machining tool based on a controlled excitation of the calibrated spindle tool, and a controller communicably coupled to the displacement sensor to acquire the performance characteristic. In measuring the performance characteristic, the displacement sensor is detached from the calibrated spindle tool. The controller is configured perform a machine health assessment based on the performance characteristic.

Abstract: A method includes positioning a cylindrical tool having one or more rows of blades within a cylindrical bore having a surface, forming annular grooves and peaks into the surface with the grooving blades when the swaging blades are in the retracted position, and translating the swaging blades from the retracted position to the extended position to deform the peaks. The one or more rows of blades includes fixed grooving blades and translatable swaging blades having retracted and extended positions.

Abstract: A method of priming a minimum quantity lubrication (MQL) tool includes determining a category of the tool, supplying a short-prime MQL dosage if the tool is a first category or if both a second category and lubricated within a first predetermined timeframe, and supplying a long-prime MQL dosage if the tool is the second category and has not been lubricated within the predetermined timeframe. The category is based on internal passage complexity of the tool.

Abstract: According to one aspect of this disclosure, a grooving tool is provided. The grooving tool has a body with a plurality of recesses. Plural inserts assembled into each of the recesses. The recesses include a cutting edge for forming grooves in an engine cylinder wall when rotated in one rotational direction. The insert also includes a peening surface extending in the opposite rotational direction from the cutting edge for deforming the upper edges of the grooves when rotated in an opposite rotational direction.

Abstract: A surface roughening tool includes a cylindrical body and at least one grooving blade outwardly radially projecting from the body and configured to form grooves and peaks into a surface. The surface roughening tool also includes at least one swaging blade outwardly radially projecting from the body and configured to deform the peaks. The at least one swaging blade is aligned with the at least one grooving blade along a circumference of the body.

Abstract: An interpolated roughening cutting tool includes a body having at least first and second cutting elements coupled thereto. The first cutting element includes rectangular cutting teeth. The second cutting element includes non-rectangular cutting teeth. The first and second cutting elements are configured to create grooves in a surface that have a top portion with blunt edge surfaces.

Abstract: A cylinder bore including an inner surface including an axial travel area and an axial non-travel area including two discontinuous axial widths of the cylindrical bore and the axial travel area extending therebetween. A nominal diameter of the axial travel area is greater than that of the axial non-travel area. A plurality of annular grooves is formed in the two discontinuous axial widths of the cylindrical bore.

Abstract: A milling tool is disclosed. The milling tool may include an elongated body having a longitudinal axis and a plurality of cutting inserts. The cutting inserts may each have a cutting edge and a cutting radius and be coupled to the body and spaced along the longitudinal axis. One or more of the plurality of cutting inserts may be adjustable (e.g., mechanically adjustable) between first and second cutting radii. A difference between the first and second cutting radii may be at least 10 ?m. The milling tool may include cutting inserts having a plurality of different cutting radii. The milling tool may be configured to have a length that spans an entire height of an engine bore. The cutting inserts having different radii may compensate for dimensional errors in an engine bore diameter that occur when milling a deep pocket.