摘要:
The invention relates to a honing method for machining the inner surface of a bore (110) in a workpiece (100) with the aid of at least one honing operation, wherein during a honing operation, an expandable honing tool coupled with a spindle is moved back and forth inside the bore for generating a lifting movement in the axial direction of the bore, and at the same time, is rotated about a tool axis for generating a rotational movement superimposing the lifting movement. In this way, a bore is generated that is rotationally symmetrical with respect to a bore axis and that deviates from the circular cylinder shape, which bore has a circular cylindrical first bore section (120) and adjacent thereto, has a non- circular cylindrical second bore section (130) having an axially variable diameter. A measuring of the diameter of the first bore section (120) in at least one measuring plane (M1-1, M1-2, M1-3) for determining a first diameter value and a measuring of the diameter of the second bore section (130) in at least one second measuring plane (M2-1, M2-2, M2-3) for determining a second diameter value takes place. An evaluation of the second diameter value takes place using the first diameter value in order to determine actual shape values, which represent an actual shape of the bore. The actual shape values are compared to target shape values in order to determine shape deviation values. A subsequent honing operation is controlled subject to the shape deviation values.
摘要:
In a honing method for machining the inner face of a bore (122) in a workpiece (120) by means of at least one honing operation, an expandable honing tool is used in a honing operation, said expandable honing tool having an expandable annular cutting group (220) having a plurality of cutting material bodies distributed around the circumference of the tool body in an end region of the tool body that is remote from the spindle, the axial length of said cutting material bodies being less than the effective outside diameter of the cutting group with the cutting material bodies fully retracted. The method is characterized by the following steps of: rigidly coupling the honing tool to a work spindle of a machine tool; positioning the honing tool and the bore relative to one another such that a tool axis (212) of the honing tool is coaxial with a setpoint position (SB) of the bore axis of the bore; introducing the honing tool into the bore, with the cutting material bodies retracted, as far as an insertion end position in which the cutting group is located in an end region (123), remote from the entry, of the length to be machined of the bore; rotating the honing tool and simultaneously expanding the cutting group, at or in the region of the insertion end position, as far as a first radial position of the cutting material bodies such that, by material-removing engagement of cutting material bodies with the inner side of the bore, a cylindrical widening (121) of the bore is produced in the end region of the bore, said cylindrical widening (121) being centred substantially with respect to the setpoint position of the bore axis; withdrawing the honing tool from the bore while simultaneously rotating the honing tool such that the bore is widened, starting from the cylindrical widening, successively in the direction of the entry side.
摘要:
A honing tool for machining an inner surface of a bore in a workpiece with the aid of at least one honing operation comprises a tool body (210) which defines a tool axis (212), an expandable annular cutting group (220) having a plurality of cutting material bodies distributed around the circumference of the tool body, the axial length of said cutting material bodies, measured in the axial direction, being less than an effective outside diameter of the cutting group with the cutting material bodies fully retracted, wherein the cutting material bodies are arranged in an end region, remote from the spindle, of the tool body and are infeedable radially with respect to the tool axis by means of a cutting group infeed system assigned to the cutting group; and an expandable guiding group (300) having a plurality of guiding strips (320) distributed around the circumference of the tool body, said guiding strips (320) being arranged on the tool body partially or fully between the annular cutting group (220) and a spindle-side coupling structure of the honing tool and being radially infeedable independently of the cutting material bodies by means of a guiding group infeed system. The honing tool can be used in particular for honing cylinder surfaces in the production of cylinder blocks or cylinder liners for reciprocating piston engines.
摘要:
The invention relates to a machining method for machining a curved workpiece surface (210) of a workpiece (200), in which a roll forming operation is carried out. At least one roller element (180A, 180B, 180C) of a machining tool (100) is rolled under a contact pressure against a segment (198) of the curved workpiece to be machined. An outer surface of the roller element comprises a rough surface structure in at least one working segment (190A, 190B, 190C) intended for rolling contact with the workpiece surface. The contact pressure is set so that a rough roll-formed structure is generated when rolling by locally deforming the workpiece material without removing material in the area of the workpiece surface being machined. The machining method can be used, for example, for machining the inner surface of a hole in a workpiece, in particular for roughening the workpiece surface for subsequent coating. The invention further relates to a machining tool and to a workpiece thus produced.
摘要:
In a method for fine processing of an internal surface of a borehole in a work piece, which is composed at least in the region of the borehole substantially of a light metal material, a processing tool performs during at least one processing operation a working motion within the borehole to be processed. The method comprises a friction strengthening operation, wherein a processing tool is used which has at least one friction element, which has at least one contact surface provisioned for friction contact with the internal surface. The friction element is moved over the internal surface at a relative speed with respect to the internal surface and at a friction-inducing pressure so that under the influence of dynamic friction and pressure in the region of the internal surface, a friction strengthened layer is produced which is induced essentially by friction and pressure. The method can be used in particular for processing cylinder running surfaces in the production of light-metal engine blocks.