Geometrical instruments – Scriber – Pantographic
Patent
1991-08-07
1993-03-16
Cuchlinski, Jr., William A.
Geometrical instruments
Scriber
Pantographic
33 2302, 33 2308, 318578, 36447403, 409 99, B43L 1324, B23Q 3504, G05B 1935
Patent
active
051932822
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a rotating body tracing control apparatus which performs a tracing operation while rotating a model and a workpiece, and more particularly, to a rotating body tracing control apparatus in which a method of setting a potential line for defining a tracing range is improved.
2. Description of the Related Art
A rotating body tracing control apparatus is used when machining, for example, a cylindrical cam, and in such a rotating body tracing control apparatus, a model and a workpiece are rotated at the same angular speed as the speed at which the surface of the model is traced by a tracer head, and the feeding speed with respect to the Z-axis direction is obtained in accordance with a detection signal, whereby the movement of the tracer head and a cutter head is controlled.
FIG. 3 is a diagram showing the relationship between a stylus and a cylindrical cam model which is traced by using the rotating body tracing control apparatus.
In FIG. 3 the stylus 5 at the distal end of the tracer head, which is movable in the Z-axis direction, detects the distance between the central axis of rotation (X-axis) of the model 6 and the point of contact of the stylus 5 with the model, by determining the displacement of the stylus 5. The tracing direction of the tracer head corresponds to the X-axis direction, and a pick feed direction to an A-axis direction.
Software limit switches, such as indicated by broken lines LXN and LXP, can be set by assigning points XN and XP on a line extending in the tracing direction (X-axis direction), and a tracing region is decided by using these software limit switches.
Accordingly, the tracer head executes a tracing with respect to the X-axis direction, and the movement thereof is stopped in the X-axis direction when the contact point of the stylus 5 comes into contact with the software limit switches LXN and LXP. Thereafter, pick feed is effected in the A-axis direction, and the X-axis is traced in the opposite direction. These operation processes are repeatedly executed.
When tracing the model 6, such as a cylindrical cam, having a groove which is curved along the X-axis direction, the tracer head is expected only to trace the groove portion of the cylindrical cam, and does not trace the outer peripheral surface of the model 6, such as regions F1 and F2.
Conventionally, however, one point on the central axis (X-axis in FIG. 3) of rotation is assigned to set the software limit switches, so that the software limit switches must be inevitably set by assigning the points XN and XP even when tracing the cylindrical cam model 6. Therefore, when tracing a cylindrical cam like the model 6, the tracer head traces the whole region of the peripheral surface of the cylinder, including the points XN and XP, and thus, conventionally, the region to be traced is so extensive that the tracing work requires much time.
SUMMARY OF THE INVENTION
The present invention has been contrived in consideration of these circumstances, and an object thereof is to provide a rotating body tracing control apparatus capable of tracing any desired region of a model, such as a groove of a cylindrical cam, having a shape which varies along the central axis of a rotating body.
To solve the above problem, according to the present invention, there is provided a rotating body tracing control apparatus which performs a tracing operation while rotating a model and a workpiece, in which the rotating body tracing control apparatus is characterized by setting a plurality of point coordinates on the outer peripheral surface of the model, which points depend on a position on the central axis of the rotation and angle of the rotating axis of the rotation, and executing the tracing by using a line connecting the plurality of points as a potential line.
The point coordinates on the outer peripheral surface of the model are assigned in accordance with the position of the central axis of the rotation and the angle of the rotating axis of the rotation. Nam
REFERENCES:
patent: 2429559 (1947-10-01), Matson
patent: 3100344 (1963-08-01), Sharp
patent: 3888162 (1975-06-01), Maenner
patent: 4370722 (1983-01-01), Imazeki et al.
patent: 4534685 (1985-08-01), Komiya et al.
patent: 4575665 (1986-03-01), Matsuura et al.
patent: 4870337 (1989-09-01), Matsuura
patent: 4982336 (1991-01-01), Aramaki
patent: 5015130 (1991-05-01), Matsuura et al.
patent: 5058281 (1991-10-01), Leviton
Aramaki Hitoshi
Okamoto Tetsuji
Cuchlinski Jr. William A.
Fanuc Ltd.
Fulton C. W.
LandOfFree
Rotating body tracing control apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotating body tracing control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotating body tracing control apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-344497