Process for honing bores and a honing machine for performing the process
AssigneeMaschinenfabrik Gehring GmbH & Co.
InventorsHans Grimm, Karl-Heinz Bergen
Life of this patent
Estimating the term…
Abstract
Pressure with which working parts of the honing tool are pressed against the bore wall is controlled during machining. The pressure per unit area of the working parts can thereby be kept constant or specifically varied, irrespective of the surface configuration of the bore wall. For this purpose, the honing machine includes a feed mechanism and electronic control device for predetermining the pressure of the working parts against the bore.
Claims15
A process for honing a bore having an axis and at least one port in the wall of the bore, comprising the steps of:
- (a) positioning a honing tool equipped with honing means within the bore and pressuring the honing means radially against the bore wall;
- (b) reciprocating the honing tool and rotating the same about its longitudinal axis, thereby pressuring the honing means against the bore wall in different planes extending transversely to the axis of the bore;
- (c) measuring the pressure force exerted by the honing means against the wall of the bore being honed and at the port in such different planes;
- (d) comparing the measured pressure force at each particular plane within the bore and at the port to a reference value according to a predetermined pressure force per unit area of contact between the bore wall and the honing means for an area of the bore wall including that plane;
- and
- (e) analyzing and utilizing the results of that comparison for controlling the pressure force of the honing means against the bore wall as a function of the size of the contact area between the honing means and the bore wall so that the honing means exerts such predetermined pressure force per unit area of contact between the bore wall and the honing means, against the bore wall.
A honing machine for honing a bore having an axis and at least one port in the wall of the bore, comprising:
- a honing tool;
- a honing means carried by the honing tool;
- a drive means for positioning the tool within the bore by reciprocating the tool along its longitudinal axis;
- a stroke displacement transducer for indicating the position of the drive mans along its longitudinal axis;
- a rotary drive for the honing tool;
- a feed mechanism for moving the honing means radially toward and away from the bore wall;
- means for measuring the pressure force exerted by said honing means against the wall of the bore being honed and at the port, and
- and electronic feed-control device which controls the radial movements of the honing means to achieve a pressure force per unit area of contact between the bore wall and the honing means, said pressure force being based on the pressure force measured against the wall and at the port by said measuring means.
A honing machine for honing a bore wall in a workpiece, said bore wall having at least one port, comprising:
- a honing tool;
- honing means carried by the honing tool;
- first hydraulic means for positioning the honing means axially within the bore in different planes extending transversely to the axis of the bore;
- second hydraulic means for moving the honing means radially inwardly or outwardly to, respectively, decrease or increase the pressure of the honing means against the bore wall;
- means for measuring the pressure force exerted by the honing means against the bore and at the port in such different planes,
- means for comparing the measured pressure force at each particular plane within the bore and at the port to a reference value according to a predetermined pressure force per unit area of contact between the bore wall and the honing means for an area of the bore wall including that plane, and
- computer means utilizing the results of such comparison for adjusting the second hydraulic means so that said honing means exerts such predetermined pressure force per unit area of contact between the bore wall and the honing means, against the bore wall.
Dependencies are inferred from the claim text.