JPH0230821B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a tracer device for the profiling of concave workpieces with deep walls on all sides, such as bathtubs and septic tanks.

Prior Art When machining deeply concave workpieces, it is necessary to tilt the tracer head to avoid interference between the model and the stylus or tracer head. For example, as in Utility Model Publication No. 33-6791, a frame tilted in a predetermined direction with respect to the spindle is attached so that the mounting direction can be adjusted, and a pin (stylus) fixing grip device is inserted into the lower tilted end to pin the frame in the tilted direction. There is something that protrudes and fixes it. This one is tilted at a constant angle in the adjusted direction. Moreover, in Utility Model Application No. 56-156555, a swing arm equipped with a copying device pivotally supported at the tip of a tool bar can rotate within a plane in a fixed direction. That is, there are some devices whose inclination angle can be adjusted only in one direction.

Problems to be Solved by the Invention As mentioned above, in the past, only devices that can adjust either the direction or the angle are known, but there is no device that can adjust both arbitrarily. There was no control device and it was impossible to respond over a wide range.

Means for solving the problem End face 1 of tracer quill 1 with T groove 1b cut out
The end face 2a perpendicular to the axis can be attached to a within a range of 360°, and a 360° angle scale is engraved on the outer periphery, and the other end face 2b is attached to the end face 2.
The first mounting tube 2 inclined at θ° with respect to a is inserted into the T groove 1b.
Fix it with a T-bolt inserted into the first mounting tube 2.
A second mounting cylinder has an angle scale engraved on the outer periphery and can be attached to an inclined end surface 2b having an annular T-groove 2c engraved thereon, with an end surface 3b inclined at θ° with respect to the axis-perpendicular end surface 3a, at a mounting angle of 180°. 3 is fixed with a T bolt inserted into the T groove 2c, and εX,
A tracer head 5 is installed to detect displacement in the directions of the three axes εY and εZ, and based on the output of the tracer head in the three axes directions, the inclination direction and angle of the tracer head are used as parameters to detect εXT, in the direction of the scanning control axis different from that of the tracer head. It includes an arithmetic device 7 that calculates displacement components in the three axial directions of εYT and εZT.

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. Axially movable hollow tracer quill 1
A T-groove 1b is cut into an annular shape in the end face 1a perpendicular to the axis of the holder. The end face 1a is attached concentrically to the quill 1 by a dowel part formed on the end face 2.
The first mounting tube 2, which is tightly attached at point a, can be mounted at any angle using a T bolt inserted into the T groove 1b. This first
The other end face of the mounting tube 2 is inclined with respect to the θ° axis at a half angle of the desired maximum inclination angle 2θ°, and a T-groove 2c is cut in an annular shape on the inclined end face 2b. A 360° angle scale A is engraved on the outer edge of the end face 2a so that the direction of the inclination angle with respect to the outer reference line of the tracer quill 1 can be confirmed. The first mounting tube 2 is attached to the inclined end surface 2b with a pinhole part formed on the inclined end surface 3b whose other end is inclined by θ° with respect to the axis-perpendicular end surface 3a, and is attached concentrically to the center of the inclined end surface 2b. The second mounted closely
The mounting tube 3 is fixed at an arbitrary mounting position with a T-bolt inserted into the T-slot 2c. An angle scale B of 180° is engraved on the outer edge of the end face 3b in relation to the inclination direction, and when the reference line of the outer edge of the inclined end face of the first mounting cylinder 2 is aligned with the angle 0°, The end face 2a of the second mounting cylinder 3 and the end face 3a of the second mounting cylinder 3 have an inclination angle of 0°, that is, they are parallel. When aligning the reference line with the 180° scale, the angle of inclination between the end faces 2a and 3a is 2θ°.
A tracer head 5 for detecting the displacement when the tip of the stylus 4 comes into contact with the tracing surface is attached to the end surface 3a of the second mounting tube 3 concentrically with the center of the end surface 3a with bolts at the flange portion 5a. It passes through the hollow part of the tracer quill 1 and is connected to a control device. The output F of this tracer head 5 is
The displacements in the three directions of the axis, Y axis, and Z axis can be extracted as εX, εY, and εZ, and this output is input to the calculation device 7, and the tracer head is determined using the given inclination direction and inclination angle of the tracer head 5 as parameters. Displacement components in different feed axis directions εXT, εYT, εZT
Calculate. This output is input to the copying device 8,
A cutter 9 attached to a universal attachment of a copying machine in the same direction as the stylus 4 controls the drive motors Mx and MyMz of the X, Y, and Z axes of feed axes of a ball end mill, for example.

Function When processing a deeply concave workpiece, when it is necessary to tilt the tracer head 5 by θ° in consideration of interference between the workpiece and the device, the second mounting pipe 3 is tilted with respect to the reference line of the first mounting pipe 2. The mounting angle will need to be changed. Loosen the T-bolt fixing the second mounting tube 3, align scale B at 90 degrees with the reference line of the first mounting tube 2, and tighten and secure the T-bolt. Then, in order to adjust the inclination direction, the T-bolt of the first mounting tube 2 is loosened and the angle scale A is aligned with a predetermined scale with respect to the reference line of the tracer quill 1.
When the inclination angle is larger than θ°, the angle scale B is
If the angle is smaller than 90° to 180°, or θ°, the second mounting cylinder 3 is adjusted between 0° and 90°, and the angle scale A is further adjusted to determine the direction. Once the direction of the stylus 4 of the tracer head 5 is determined in this way, the cutter 9 of the copying machine is directed in the same direction as the stylus 4 by adjusting the universal attachment. The tracer head 5 is positioned to follow the model, the cutter 9 is positioned to the workpiece machining position, feed is applied to the tracer head 5, and the outputs εX, εY, and εZ when the stylus 4 contacts the model are calculated by the calculation unit 7.
The displacement components εXT, εYT, and εZT of the cutter in the direction of the feed axis are calculated, and the calculated values are input to the copying device 8, which drives the feed axis drive motors Mx and εZT, respectively.
Copying is performed by controlling My and Mz.

Effects As detailed above, two mounting tubes with end faces inclined at the same angle are interposed between the tracer quill and the tracer head, so that the angle of the tracer head can be adjusted very easily with a simple mechanism. In addition, another copying device can be controlled by the output of the control device that calculates the 3-axis displacement component in the direction of the scanning control axis using the inclination direction and angle of the tracer head that detects the displacement in the 3-axis directions as parameters. It has the effect of being able to easily and appropriately handle a wide range of machining of deep concave workpieces by driving.

[Brief explanation of drawings]

Figure 1 is a diagram showing the state in which the tracer head is attached to the tracer quill, Figure 2 is a diagram showing the relationship between the stylus and the cutter, Figure 3 is a diagram showing the relationship between the displacement of the stylus and the displacement component, and Figure 4 is a diagram showing the control. It is a block diagram. 1... Tracer quill, 2... First mounting tube, 3
...Second mounting tube, 4...Stylus, 5...Tracer head.

Claims (1)

[Claims] 1. A tracer quill which is movable in the axial direction and whose end face perpendicular to the axis can be mounted at any position within a 360° range, has an angular scale engraved on its outer periphery, and whose other end face is inclined at θ° with respect to said end face. The mounting tube and the end surface of the first mounting tube, the other end of which is inclined by θ° with respect to the end surface perpendicular to the axis, can be mounted at any position within a range of 180°, and angle scales are engraved on the outer periphery. a second mounting cylinder, a tracer head that is attached to the axis-perpendicular end face of the second mounting cylinder and detects displacement in the three-axis directions of εX, εY, and εZ; A tracer device comprising a tracer head and an arithmetic device that calculates three-axis displacement components of εXT, εYT, and εZT in different scanning control axis directions using the inclination direction and the inclination angle as parameters.