Method of measuring flexure value of wire electrode

A method for measuring the flexure of the wire electrode, comprising the following steps of:

• (a) making a wire electrode which is in a machining path come into contact with a detection edge of a workpiece in a straight machining groove, after machining, to get an electric discharge gap which is a distance between a margin of the wire electrode without contacting with the workpiece along the straight machining groove and a point where the wire electrode contacts with the workpiece;
• (b) using a detection voltage of a machine to detect the machined groove, and an original programmed path minus the discharge gap as a new programmed path to trigger a detection voltage for dry-run and re-machining the workpiece;
• (C) compensating different angles in different corner parts by a method which is as follows:
• for an angle in a corner part less than 180°, while the wire electrode advances in a groove along the machining path to a central line of the angle, the wire electrode would contact with the short-circuited curve path, and then, the wire electrode is retracted relative to the short-circuited path along the central line of the angle, and thereafter, when the short-circuited contact between the wire electrode and the workpiece has been just released by a foregoing retraction, a displacement is a flexure in the corner part and the flexure value times the sine function of one half of the angle in the corner part is a compensation value of the flexure in the corner part;
• and
• for an angle in a corner part greater than 180°, while the wire electrode advances in a groove along the machining path to a central line position of the angle, the wire electrode would keep a distance from the short-circuited curve path, and then, the wire electrode is advanced relative to the short-circuited path along the central line of the angle, and thereafter, when the wire electrode has come into contact with the short-circuited curve path, and the short-circuited contact between the wire electrode and the short-circuited curve path has been just released by the foregoing advance, the displacement is the flexure in the corner part, and the flexure value times the sine function of one half of the angle in the corner part is the compensation value of the flexure in the corner part;
• (d) recording the flexure value and the compensation value of the flexure value in different angles in a memory built in an numerical control device for adjusting discharge parameters in the course of machining in the next time.

A method for measuring the flexure of the wire electrode, comprising the following steps of:

• (a) making a wire electrode which is in a machining path come into contact with a detection edge of a workpiece in a straight machining groove, after machining, to get an electric discharge gap which is a distance between a margin of the wire electrode without contacting with a workpiece along the straight machining groove and a point where the wire electrode contacts with the workpiece;
• (b) using a dection voltage of a machine to detect the machined groove, and a original programmed path minus the discharge gap as a new programmed path to trigger a detection voltage for dry-run and re-machining the workpiece;
• (C) recording short-circuited positions where wire electrode and the workpiece are short-circuited in the inside of each circular arc;
• (d) changing a compensation value which is increased for an angle in the inside of each circular arc, and decreased for the angle in the outside of each circular arc to re-machine the workpiece for dry-run, and to detect and record that the short-circuited would happen in the corner part or not;
• (e) recording the angle in the inside of each circular arc, while a contact between the wire electrode and the workpiece is just released, and a present compensation value is the compensation value of the flexure value in the circular arc, and recording the angle in the outside of each circular arc, while the wire electrode and the workpiece are short-circuited, and a last compensation value previous to the present compensation value is used as the compensation value for the circular arc to find out a flexure value of the circular arc;
• and
• (f) recording the compensation value of the flexure value and the flexure value in each circular arc in a memory built in an numerical control device for adjusting discharge parameters at machining.

A method for measuring the flexure of the wire electrode, comprising the following steps of:

• (a) making a wire electrode which is in a machining path come into contact with a detection edge of a workpiece in a straight machining groove, after machining, to get an electric discharge gap which is a distance between a margin of the wire electrode without contacting with the workpiece along the straight machining groove and a point where the wire electrode contacts with the workpiece;
• (b) using a detection voltage of a machine to detect the machined groove, and a original programmed path minus the discharge gap as a new programmed path to trigger the detection voltage for dry-run and re-machining the workpiece;
• (c) compensating different angles in different circular arcs by a method which is as follows:
• for positions inside the circular arcs, while the wire electrode advances in a groove along the machining path to reach a connecting line from a center of the curvature of the circular arc to a middle point of a corresponding circular arc to contact with the short-circuited curve path, the wire electrode is retracted relative to the short-circuited curve path along the connecting line, and while the short-circuited contact between the wire electrode and the workpiece has been just released by the foregoing retraction, the displacement is the flexure in the circular arc and the compensation value of the flexure in the circular arc is obtained from the flexure;
• and
• for positions outside the circular arcs, while the wire electrode advances in a groove along the machining path to reach a connecting line from a center of the curvature of the circular arc to a middle point of a corresponding circular arc, the wire electrode is advanced relative to the short-circuited curve path along the connecting line, and while the wire electrode has come into contact with the short-circuited curve path, and then the short-circuited contact between the wire electrode and the workpiece has been just released by the outgoing retraction, the displacement is the flexure in the circular arc and the compensation value of the flexure in the circular arc is obtained from the flexure;
• and
• (d) recording the compensation value of the flexure value and the flexure value in each circular arc in a memory built in an numerical control device for adjusting discharge parameters at machining.