JPH0524430Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a positioning device for a shuttle unit used in a special-purpose machine tool, a transfer machine, etc., and particularly to a positioning device suitable for high-precision machining.

[Conventional technology]

A positioning method in a machine tool using a shuttle unit will be explained with reference to FIGS. 2 to 5.

The saddle 2 placed on the slide base 1 has vertical and horizontal movements regulated by a slide plate 3 and a slide gib 4, and is moved back and forth with respect to the slide base 1 by a hydraulic cylinder 5.

Further, the table 6 placed on the saddle 2 has its vertical and longitudinal movements regulated by a slide plate 7 and a slide gib 8, and is moved left and right with respect to the saddle 2 by a hydraulic cylinder 9.

For example, a boring unit 10 is fixed to the table 6, and a drill 12 attached to a main shaft 11 performs drilling.

Reference numeral 13 denotes positioning fittings attached to the left and right sides of the saddle 2, which are used to position the table 6 in the left and right direction.
That is, the drill 12 is positioned in the left-right direction. The positioning fitting 13 is screwed onto the saddle 2 and is prevented from loosening by a nut 14 in order to facilitate changing the position of the corresponding table 6 when the drilling position is changed. The positioning fitting 13 is installed on the axis of the hydraulic cylinder 9 so that no bending moment is generated in the left-right direction on the rod of the hydraulic cylinder 9 and the table 6 when positioning the table 6.

In the above configuration, when the receiving surface 15 of the positioning metal fitting 13 that contacts the table 6 contacts the table 6 on its entire surface, no bending moment in the left-right direction is applied to the table 6, and no special position control is required. The drill 12 can be positioned.

[Problem that the invention attempts to solve]

For example, when using the right inner side surface 16 of the saddle 2 as a reference, since the positioning metal fitting 13 is screwed onto the saddle 2 as described above, the axis of the female thread provided on the saddle 2 is aligned with the side surface 16. If the receiving surface 15 is tilted, for example, even if the receiving surface 15 is machined perpendicularly to the axis of the positioning metal fitting 13, the receiving surface 15
5 is inclined with respect to the side surface 16.

In addition, since the table 6 is moved left and right, the distance between the guide surfaces 17a and 17b of the saddle 2 is the distance between the guide surface 18 of the table 6 and the side surface 19 of the slide gib 8 attached to the table 6. Greater than the distance by A.

Here, the problem will be explained with reference to FIG. 5, taking as an example the case where the table 6 is moved to the right.

In the above configuration, the table 6 includes the drill 1
With respect to the position shown by the two-dot chain line parallel to the processing direction of No. 2, as shown by the solid line, the receiving surface 15 is rotated at an angle α with respect to the side surface 16 or an angle β at which it can be rotated by the distance difference A described above. Tilt only by the smaller angle.

When the table 6 tilts, the drill 12 placed on it also tilts, and the tip 20 of the drill 12 and the table 6
When the distance from the center O is l, the tip 20 is lα
Or deviate by the smaller distance of lβ,
Since l is generally large, there is a problem in that positional deviation occurs and the axis of the hole to be machined is tilted.

Furthermore, since the receiving surface 15 is usually not perpendicular to the axis of the positioning fitting 13, when the positioning fitting 13 is rotated to change the horizontal position of the table 6, the angle α of the receiving surface 15 with respect to the side surface 16 also changes. However, there was also the problem that positioning took time.

An object of the present invention is to provide a positioning device that allows easy positioning and highly accurate processing.

[Means for solving problems]

In order to achieve the above object, the present inventor has developed a table 6 as shown in FIG. 1, which is an embodiment of the present invention.
At least two positioning fittings were provided at each of the left and right stroke ends of the table 6, and a sensor was provided to detect the distance between the table 6 and the placement fitting.

[Effect]

By providing at least two positioning metal fittings on one side, the table, that is, the drill, can be easily positioned without increasing the shape accuracy of the receiving surface of the positioning metal fitting or the processing accuracy of the mounting portion. Moreover, by detecting the gap between the table and the positioning metal fitting, machining with excellent positional accuracy is possible without machining with a misaligned position.

〔Example〕

FIG. 1 shows an embodiment of the present invention. A positioning metal fitting 21 disposed at approximately the same distance from the hydraulic cylinder 9 is screwed into a side surface of a saddle 22.

The positioning fitting 21 also serves as a nozzle of an air sensor, and a hole 23 provided in the center has one side facing the table 6 and the other side connected to an air hose 24. The other end of the air hose 24 is connected to an adhesion checking device (not shown) that uses the back pressure of the compressed air passing through the hole 23 to check the adhesion between the table 6 and the positioning fitting 21 .

With the above configuration, when setting the distance between the axial center of the drill 12 and the receiving surface 25 of the positioning metal fitting 21, for example, the receiving surface 25a is temporarily determined at an approximate position, and the axial center of the drill 12 is set using this as a reference. The position of the receiving surface 25b is determined so that it is parallel to the side surface 26 of the table 6, and then the deviation from the required distance is corrected. In other words, it is only necessary to manage the distance between the receiving surfaces 25a and 25b at the farthest position from the inner surface 27 of the saddle 22.
There is no need to consider the slope with respect to 7.

Furthermore, there is no need to increase the width W of the table 6 more than necessary in order to reduce the angle β described above with respect to the constant distance A described above.

Furthermore, once the positioning bracket 21 is fixed, the distance between the hole 23 and the side surface 26 will be constant, even if the receiving surface 25 is tilted to the side surface 26 and not in close contact with the side surface 26, and the back pressure when positioning the table 6 will be constant. teeth,
Determined at a certain value. Therefore, by memorizing the back pressure of the compressed air when positioning the table 6 and comparing the back pressures each time the table 6 is positioned, it is possible to perform machining even when the table 6 is not at the machining position. We never make defective products.

In addition, in this embodiment, the hole 2 for contact detection is
3 is provided on the positioning metal fitting 21 to serve as a nozzle, but it goes without saying that it may also be provided on the table 6 side.

Moreover, between the table 6 and the positioning metal fitting 21
was confirmed using an air sensor, but other sensors,
It goes without saying that, for example, a proximity switch may be used.

[Effect of idea]

As described in detail above, when the present invention is applied, the component parts for positioning can be positioned with high accuracy without particularly increasing the machining accuracy, and the operation is easy. Furthermore, since the position can be confirmed using a sensor, there is an effect that processing can be performed with less variation in position.

[Brief explanation of the drawing]

FIG. 1 is a front view of one embodiment of the present invention, and FIGS. 2 to 5 are explanatory diagrams of conventional examples. 6...Table, 13...Positioning bracket, 21
...Positioning bracket (sensor nozzle).

Claims (1)

[Scope of utility model registration request] In a positioning device for a shuttle unit that reciprocates a table on which a processing device is mounted in a direction perpendicular to the processing direction, a pair of positioning fittings are provided at each moving end of the table at a predetermined interval so as to face the table, A positioning device for a shuttle unit, comprising a detection means for detecting a gap between a cable and a positioning metal fitting.