Wire cutting electrical discharge machine with wire annealing for threading
First Claim
1. A wire electrical discharge machine comprising:
- an upper wire head mounted to a head so that it is vertically movable;
a lower wire head installed below a work arranged below the upper wire head;
an automatic wire feeder to feed a wire electrode paid out from a wire electrode supply source through rollers disposed above the head to a machining area of the work;
a cylinder device extending from the top of the head to its bottom and having a cylinder secured to the head and a piston reciprocatingly moving in the cylinder;
a holder secured to a slider moving vertically along the cylinder in response to the motion of the piston of the cylinder device;
a feed pipe through which the wire electrode is passed and which is secured to the holder so that it extends vertically down, the feed pipe being adapted to insert the wire electrode supplied from the wire electrode supply source through the upper wire head, the holes formed in the work and the lower wire head;
a pair of anneal rollers provided to the holder which are driven to clamp and feed the wire electrode and through which an electric current can be passed to anneal the wire electrode;
a cutter installed on the head to cut the wire electrode;
a pair of clamping members provided to the head at a location below the cutter, the clamping members being adapted to be opened and closed to clamp the wire electrode for annealing;
a waste wire clamp to remove the cut wire electrode that was cut by the cutter;
a wire electrode recovery device to pull out and recover the worn wire electrode discharged from the lower wire head; and
a controller to control the vertical movement of the holder, the feeding of the wire electrode by the anneal rollers, and the annealing of the wire electrode by clamping the wire electrode with the clamping members, driving the anneal rollers in the reverse direction to tense the wire electrode and, in this tensed state, annealing a portion of the wire electrode between the anneal rollers and the clamping members.
1 Assignment
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Accused Products
Abstract
A wire electrical discharge machine that reliably feeds the wire electrode at high speed into an upper wire head, holes in the work and a lower wire head. This wire electrical discharge machine moves the holder, which has a vertically extending feed pipe secured thereto, up or down at high speed by activating the cylinder device. At the same time, the lower end of the wire electrode is clamped by the clamping members and the anneal rollers are driven in the reverse direction to tense the wire electrode. With the wire electrode tensed in this way, the anneal processing is performed. This construction makes the machine compact. Further, when the wire electrode is to be inserted into the holes in the work, it is fed at low speed by the anneal rollers. When the wire electrode rides on the jet stream in the jet stream guide pipe, the wire electrode is moved at high speed by the anneal rollers to reduce the time taken by the wire electrode feeding.
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Citations
10 Claims
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1. A wire electrical discharge machine comprising:
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an upper wire head mounted to a head so that it is vertically movable; a lower wire head installed below a work arranged below the upper wire head; an automatic wire feeder to feed a wire electrode paid out from a wire electrode supply source through rollers disposed above the head to a machining area of the work; a cylinder device extending from the top of the head to its bottom and having a cylinder secured to the head and a piston reciprocatingly moving in the cylinder; a holder secured to a slider moving vertically along the cylinder in response to the motion of the piston of the cylinder device; a feed pipe through which the wire electrode is passed and which is secured to the holder so that it extends vertically down, the feed pipe being adapted to insert the wire electrode supplied from the wire electrode supply source through the upper wire head, the holes formed in the work and the lower wire head; a pair of anneal rollers provided to the holder which are driven to clamp and feed the wire electrode and through which an electric current can be passed to anneal the wire electrode; a cutter installed on the head to cut the wire electrode; a pair of clamping members provided to the head at a location below the cutter, the clamping members being adapted to be opened and closed to clamp the wire electrode for annealing; a waste wire clamp to remove the cut wire electrode that was cut by the cutter; a wire electrode recovery device to pull out and recover the worn wire electrode discharged from the lower wire head; and a controller to control the vertical movement of the holder, the feeding of the wire electrode by the anneal rollers, and the annealing of the wire electrode by clamping the wire electrode with the clamping members, driving the anneal rollers in the reverse direction to tense the wire electrode and, in this tensed state, annealing a portion of the wire electrode between the anneal rollers and the clamping members. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification