JPS6119546A - Profiling mechanism available in arbitrarily selected direction - Google Patents

Abstract

PURPOSE:To raise the precision in processing, by systematizing a profiling mechanism available in arbitrarily selected direction as the direction in profiling can be decided in accordance with the shape of a profiled model. CONSTITUTION:A profiling control device 9 of a profiling mechanism available in arbitrarily selected direction which is useful as an engraving machine or a three dimensional measuring instrument, has an ordinary profiling function by which a signal of a tracer head 8 is accepted, its error signal is made, and the machine is controlled as this error vanishes. Beside this ordinary function, the said device 9 has other function such as a vector calculating means 10 which calculates component parts of X-Y plane in the profiling direction according to a signal of the tracer head 8, a profiling direction setting means 11, a profiling direction calculating means 12 which decides the profiling direction 16 and the pickfeed direction 17 according to the output signals of the said means 10, 11, a distributive circuit 13 which distributes the output signal of the said profiling direction calculating means 12 into a component in X-axial direction and a component in Y-axial direction, and a servo-amplifier 14. By this system, the precision in processing can be raised.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an arbitrary direction copying device, and is useful as a die-sinking machine, a scanning machine, and a three-dimensional measuring machine.

In surface copying with a die-sinking machine, as shown in Figure 1 (a) and Figure 1 (bl), there are cases where a shape 1 having an angle that forms the feed axis (X-axis in the figure) is copied.

However, even in this case, the scanning direction 2 in the prior art is either parallel to the feed axis (in the case of Fig. 1 (al)) or in a direction 45° to the feed axis (in the case of Fig. 1 (b)). Furthermore, the pick feed direction 3 was also parallel to the feed axis.Therefore, this prior art has the following drawbacks.

a) Accuracy is high because the shape is fed in the direction of the feed axis or at a 45° angle to the shape that is inclined to the feed axis.
Not.

b) The width between the tool paths on the slope varies depending on the slope. In the case of FIG. 1(a), the width between the tool paths is larger than the given amount of pickoff and eid, and it takes time and effort to finish.

In addition, in the case of FIG. 1 (bl), the width between the tool paths is smaller than the amount of pick feed given, and the machining time becomes longer.

C) Since the pick blade direction 3 is parallel to the feed axis, there will be a lot of unnecessary movement. For this reason, machining time becomes longer.

Note that FIG. 1 (Ql indicates the cross section of shape 1).

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide an arbitrary-direction copying device that can arbitrarily set a copying direction and apply pick feed in a direction perpendicular to this copying direction. The present invention achieves this object by providing vector calculation means for calculating components of an XY plane, which is a horizontal plane, from a signal from a tracer head tracing a three-dimensional curved surface;
A copying direction setting means for setting a copying direction, and a copying direction calculation means for calculating a copying direction and a pick feed direction in response to output signals of a vector calculation means and a copying direction setting means, and a copying direction that is arbitrarily given. The feature is that the pick feed is applied in a direction perpendicular to the .

Embodiments of the present invention will be described in detail below based on the drawings. In Fig. 2, reference numeral 4 denotes an ordinary die-sinking machine, in which a workpiece 6 to be machined and its model 7 are placed on a table 5, and a tracer is moved up and down along with the tool. A tracer head 8 is fixed on the support. The copying control device 9 has a normal copying function of receiving a signal from the tracer head 8, generating an error signal, and controlling the machine so that the error is eliminated. a vector calculation means 10 for calculating the copying direction, a copying direction setting means 11 for setting the direction of copying, a copying direction calculation means 12 for determining the copying direction 16 and the pick feed direction 17 based on the output signals of the vector calculation means 10 and the copying direction setting means 11; This tracing direction calculation means 12
Distribution circuit 13 that divides the output signal into X and Y axis direction components
It also has a servo amplifier 14 that amplifies signals for each of the X and Y axes and drives a motor provided on each feed axis of the machine.

When the die-sinking machine 4 is used to copy a shape 15 that forms an angle with the feed axis as shown in FIG. When set, the copying direction calculation means 12 issues a signal to be sent in the set direction, and when the machine is sent in that direction and reaches the copying stroke limit 18, the copying direction calculation means 12 issues a signal to be sent in the direction perpendicular to the copying direction.

The copying stroke limit 18 is given by a potential line or a software potential line. When the pick feed amount is moved in the direction perpendicular to the copying direction, copying is performed in the opposite direction, and when the copying stroke limit 19 is reached, the pick feed is applied in the direction perpendicular to the copying direction 16 as before. Thereafter, the above-mentioned operation is repeated.

Although FIG. 3 shows the case of reciprocating copying, copying can be performed in exactly the same manner in the case of unidirectional copying.

As specifically explained above in conjunction with the embodiments, according to the present invention, the scanning direction is determined according to the shape of the copying model, so that machining accuracy is improved.

Further, since the distance between the tool paths is the same as the given pick feed amount and the pick feed direction is parallel to the inclined surface, there is no wasted movement and the machining time can be shortened.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are explanatory diagrams showing the mode of copying in the prior art, FIG. 1(c) is a sectional view showing a cross section of the copying shape, and FIG. 2 is a mold according to an embodiment of the present invention. FIG. 3 is a block diagram showing the engraving machine together with its control device, and is an explanatory diagram showing its copying mode. In the figure, 4 is a die-sinking machine, 10 is a vector calculation means, 11 is a copying direction setting means, 12 is a copying direction calculation means, 15 is a shape, 16 is a copying direction, and 17 is a pick feed direction.

Claims (1)

[Claims] A vector calculation means for calculating components of an XY plane, which is a horizontal plane, from a signal from a tracer head that traces a three-dimensional curved surface, a tracing direction setting means for setting a tracing direction, and receiving output signals from the vector calculation means and the tracing direction setting means. What is claimed is: 1. An arbitrary direction copying device, comprising a copying direction calculation means for calculating a copying direction and a pick feed direction, and is adapted to apply pick feed in a direction perpendicular to an arbitrarily given copying direction.