US 5,029,499 A · Remaining bar material machining method for NC lathe

Abstract

In a remaining bar material machining method, a plurality of works are taken from a continuous bar material on an NC lathe, and the remaining portion left at the end of the bar material is machined effectively. In the lathe in which both first and second headstocks are axially movable along the bed, the continuous bar material can be continuously machined with efficiency. At that time, to utilize the remaining portion left at the end of the bar material effectively without discarding it, this remaining bar material is transferred to the second headstock. An NC controller includes a main machining program and a remaining bar material machining program; when the remaining bar material has been transferred to the second headstock, the remaining bar material machining program is executed instead of the main machining program having hitherto been executed. During machining the remaining bar material on the second headstock, the first headstock is waiting in readiness for the machining of the next bar material.

Claims13

Dependent claims

A method of machining a remaining bar material in an NC lathe in which a bar material is supplied to a first headstock by a bar material feeder and then undergoes a predetermined machining by an NC controller, comprising the steps of:

providing the NC controller with a least both a main machining program and a remaining bar material machining program;
executing the main machining for dividing the bar material, supplied to the first headstock, into a plurality of material pieces;
outputting a bar material-absence signal to the NC controller when the length of the remaining bar material supplied to the first headstock reduces to a predetermined value or less;
switching the NC controller from the main machining program to the remaining bar material machining program in response to the bar material-absence signal;
by the remaining bar material machining program, transferring the remaining bar material from the first headstock to a second headstock confronting the first headstock;
and
executing the remaining bar material machining at this second headstock side.

4 more elements

providing the NC controller with at least both a main machining program and a remaining bar material machining program;
executing the main machining for dividing the bar material, supplied to the first headstock, into a plurality of material pieces;
outputting a bar material-absence signal to the NC controller when the length of the remaining bar material supplied to the first headstock reduces to a predetermined value or less;
switching the NC controller from the main machining program to the remaining bar material machining program in response to the bar material-absence signal;
by the remaining bar material machining program, transferring the remaining bar material from first headstock to a second headstock confronting the first headstock;
setting at a predetermined value the length of the remaining bar material projecting from the second headstock;
and
conducting the machining of the remaining bar material on the second headstock.

5 more elements

Dependencies are inferred from the claim text.

Remaining bar material machining method for NC lathe

Life of this patent

Remaining bar material machining method for NC lathe

Life of this patent

Abstract

Claims13