Spindle control command method

Details Spindle control command method Spindle control command method

1990-10-01

1993-01-19

Smith, Jerry

Boots, shoes, and leggings

36447402, 36447414, 318625, G06F 1546

Patent

active

051811782

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
This invention relates to a spindle control command method, and more particularly, to a spindle control command method in which a control of a plurality of spindles is switched by a program command.
2. Description of the Related Art
To carry out machining of workpieces at a high speed, CNC lathes with a plurality of spindles are widely used. In these CNC lathes, opposed spindles may be used to individually machine respective workpieces, or when a long workpiece is to be machined, may be used to cooperatively rotate the workpiece.
Accordingly, it is necessary to provide rotation commands for controlling the two spindles independently as well as those for controlling the spindles as a unit, and to this end, the rotation commands supplied to spindle control circuits are switched by hardware. This switching, however, requires a circuit having a complicated structure and entails an increase in the number of parts required.


SUMMARY OF THE INVENTION

This invention was created in view of the above-described circumstances, and an object thereof is to provide a spindle control command method in which control of a plurality of spindles is switched by a program command.
To achieve the above object, according to this invention, there is provided a spindle control command method of controlling a plurality of spindles by a single numerical control device (CNC), characterized in that switching between individual control and synchronous control of the spindles is effected by a program command.
Namely, whether a plurality of spindles should be controlled individually or synchronously is commanded by an NC program, and in accordance with the command, the CNC device effects switching to the individual spindle control or to the synchronous spindle control.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a conceptual diagram illustrating a spindle control command method according to this invention;
FIG. 2 is a diagram showing an example of an NC program according to this invention; and
FIG. 3 is a block diagram showing hardware of a numerical control device (CNC) for carrying out this invention.


DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

An embodiment of this invention will be described with reference to the drawings.
FIG. 1 illustrates the concept of a spindle control command method according to this invention, wherein a long workpiece 5 is held by a chuck 2 of a spindle A 1 and by a chuck 4 of a spindle B 3, and a turning operation is effected by a tool 6a of a tool post A 6 or by a tool 7a of a tool post B 7. In this case, the spindles A 1 and B 3 must be rotated synchronously, and accordingly, an identical rotation command is given to each.
The lower part of FIG. 1 illustrates a case wherein the spindles are used for machining different workpieces. Here, a workpiece A 5a is held by the chuck 2 and a turning operation is effected by the tool 6b, and a workpiece B 5b is held by the chuck 4 and a turning operation is effected by the tool 7b.
The spindle controls described above are switched by commands "G08.1" and "G08.0" in an NC program 9 on an NC tape. Namely, when "G08.1" is commanded a synchronous control of the spindles A 1 and B 3 is carried out, and when "G08.0" is commanded the spindles A 1 and B 3 are controlled independently and the number of rotations thereof are separately determined.
FIG. 2 shows an example of an NC program according to this invention. As shown in the Figure, an instruction at sequence number N010 in the NC program 9 includes a command for synchronous control of the spindles A and B, corresponding to the case of machining a long workpiece as shown in FIG. 1. Specifically, "G08.1" is the synchronous control command, "P1" indicates the spindle A, and "Q2" indicates the spindle B, whereby the spindles A and B are controlled synchronously. "S1000" is a rotation command for the spindles.
An instruction at sequence number N060 includes a command to cancel the synchronous control of the spindles A and B, and accordingly, a turning operati

REFERENCES:
patent: 4683786 (1987-08-01), Kersten et al.
patent: 4862380 (1989-08-01), Kawamura et al.
patent: 4878172 (1989-10-01), Matsumura
patent: 5037252 (1991-08-01), Hasegawa et al.
patent: 5047702 (1991-09-01), Hanaki et al.
patent: 5058029 (1991-10-01), Uemura
patent: 5083071 (1992-01-01), Sasaki et al.

Affiliated with

Also associated with

Rating

Spindle control command method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spindle control command method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spindle control command method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-105804