JPH038968Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a coordinate measuring machine.

As shown in FIG. 1, a conventional three-dimensional measuring machine includes a slider 1 disposed movably in the XY-axis direction, a spindle 2 supported by the slider 1 so as to be movable in the Z-axis direction, and a spindle 2 supported by the slider 1 so as to be movable in the Z-axis direction. A touch signal probe 3 is attached to the tip of the spindle 2, and the base end of the touch signal probe 3 is attached directly to the tip of the spindle 2. By the way, touch signal probe 3
In this method, the contact 4 at the tip is brought into contact with a workpiece (not shown) to obtain a contact signal at the time of contact, but depending on the shape of the contact part (measurement point) of the workpiece, the If the entire touch probe 3 is tilted with respect to the axial direction of the spindle 2 so that the contact 4 is directed in a substantially horizontal direction, the desired measurement location, especially a tertiary surface such as a side surface of the workpiece, must be Original measurement may not be possible.

Therefore, even if the effective maximum stroke of the slider 1 in the X-axis direction is T, if the total length of the touch signal probe 3 is L, the contact 4 at the tip of the touch signal probe 3 can actually be measured. In some cases, the effective maximum stroke was reduced to (T-2L). More specifically, touch signal probe 3
The total length L is determined due to the structure of the touch signal probe 3 and also due to the measurement reason that it must be possible to measure deep holes, etc.
Usually, it is at least about 100 mm to 150 mm, and therefore, the measurable maximum effective stroke of the contactor 4 is reduced by at least 200 mm to 300 mm. Therefore, if the effective maximum stroke T of the slider 1 is, for example, 800 mm, the actual stroke of the contactor 4 would be reduced by about 25% to 38%. Moreover, the same problem occurred not only in the X-axis direction but also in the Y-axis direction. For this reason, it is likely that the placement position, posture, etc. of the workpiece must be changed in various ways during measurement, which tends to make the measurement work more complicated.

An object of the present invention is to provide a coordinate measuring machine with a wide measurement area.

The present invention includes a slider arranged so as to be movable in the X-axis direction and the Y-axis direction, which are orthogonal to each other in a substantially horizontal direction, and a slider supported movably in the Z-axis direction, which is orthogonal to each of the X-axis and the Y-axis. A three-dimensional measuring machine is equipped with a spindle, and a touch signal probe that is attached to the tip of the spindle and is capable of making measurements in the horizontal direction. and at a position separated by a predetermined length from the axis of the spindle, for example, a length corresponding to the entire length of the touch signal probe, via a substantially L-shaped intermediate member that is curved and directed vertically downward from the horizontal direction. The touch signal probe is mounted on the spindle so that its rotational position can be adjusted around its center axis, so that even when the touch signal probe is mounted horizontally, the contact at the tip of the touch signal probe is aligned with the axis of the spindle, for example. The purpose is achieved by not reducing the measurable maximum effective stroke of the contactor by positioning it on a line, etc. In other words, by increasing the maximum effective stroke of the contactor. This is what I am trying to do.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 2 shows the overall configuration of an embodiment of a three-dimensional measuring machine according to the present invention. In the figure, a measurement table 12 is placed on a base 11, and columns 13 are erected on both sides of the measurement table 12, respectively. A cross beam 15 is provided on the pair of columns 13 so as to be movable in the Y-axis direction via a guide rail 14 extending in the Y-axis direction (perpendicular to the plane of the drawing), which is a substantially horizontal direction. A slider 17 is provided on the crossbeam 15 via a guide rail 16 so as to be movable in the direction of extension of the crossbeam 15, that is, in the X-axis direction, which is substantially orthogonal to the Y-axis direction. It is arranged movably in the axial direction and the Y-axis direction.

A spindle 18 is supported on the slider 17 so as to be movable in the Z-axis direction perpendicular to the X-axis and the Y-axis.
The proximal end of the touch signal probe 19 is attached via an intermediate member 21, and when the touch signal probe 19 is attached horizontally as shown in the figure, the tip of the touch signal probe 19 is attached to the The contactor 22 is configured to be located on the axis of the spindle 18.

As shown enlarged in FIGS. 3 and 4, the intermediate member 21 is made of an L-shaped round shaft member whose one side is curved to be equal to the entire length of the touch signal probe 19.
Hold the holder 24 with one side equal to the total length of the touch signal probe 19 oriented horizontally, for example.
It is attached to the spindle 18 via. The holder 24 is formed of a round shaft material of a predetermined length, and the upper end side is fitted into the spindle 18 and is rotated around the central axis of the spindle 18 by a mounting screw 25 that is screwed onto the spindle 18. Configured to be adjustable and fixed. Also,
On the lower end side of the holder 24, there is a mounting piece 26 in the shape of a substantially plate piece.
is provided with a fixing screw 27 on this mounting piece 6.
One end of the intermediate member 21 is fixed via.

An adapter 29 is fixed to the other end of the intermediate member 21 via a fixing screw 28, and this adapter 29 constitutes the base end of the touch signal probe 19,
The touch signal probe 19 is fixed with its center axis oriented substantially horizontally.

According to this embodiment, the touch signal probe 19 is attached to the spindle 18 via the intermediate member 21 so that the contact 22 is located on the axis of the spindle 18. As shown, when the maximum effective stroke of the spindle 18 in the X-axis direction is T, the maximum effective stroke of the contactor 22 can also be equal to T.
That is, the maximum effective stroke of the contactor 22 is not reduced by a length equivalent to approximately twice the total length of the touch signal probe 19, as in the conventional case.
In other words, the maximum effective stroke of the contactor 22 can be made long, and therefore the measurement area can be made wide. Therefore, the desired measurement point of the workpiece placed on the measurement table 12 can be
It is possible to measure continuously one after another without changing the posture etc. during measurement, and the efficiency of measurement work can be improved.

Further, the intermediate member 21 has an extremely simple structure, and can be easily applied to a conventional three-dimensional measuring machine, and has an extremely wide range of uses.

Furthermore, if the touch signal probe 19 is attached to the intermediate member 21 with the contact 22 at its tip facing vertically downward, the total length of the touch signal probe 19 (the length of one side of the intermediate member 21) can be reduced to L. The maximum effective stroke of the contactor 22 is (T+
2L). In other words, the stroke T of the slider 17 is restricted by the structure of the slider 17, and is generally reduced by a certain length from the end-to-end length between both columns 13. Even in such a case, according to this embodiment, the measurement area can be easily set from one end to the other between both columns 13 by using the intermediate member 21.

Note that in implementation, the intermediate member 21 does not necessarily have to position the contact 22 accurately on the axis of the spindle 18, but as long as it can be positioned close to the axis, the maximum effective stroke of the contact 22 can be adjusted. can be made approximately equal to the maximum effective stroke of the spindle 18. Furthermore, it is not always necessary to position the contactor 22 on or near the axis of the spindle 18; for example, one side of the intermediate member 21 may be made longer than the entire length of the touch signal probe 19. The contactor 22 may be arranged at a position separated from the axis of the spindle 18 by a predetermined length. Even in such a case, depending on the shape of the column 13 etc., there may be no risk of the intermediate member 21 colliding with the column 13 etc. In this case, the maximum effective stroke of the slider 17 Compared to T, the maximum effective stroke of the contactor 22 can be further expanded.

That is, the gist of the present invention lies not only in the structure in which the contactor 22 is arranged on the axis of the spindle 19, but also in the structure in which the touch signal probe 19 is mounted directly on the mounting piece 26 in the past. On the other hand, the intermediate member 21 is used to connect the base end of the touch signal probe 19 to the spindle 18.
There is a structure in which the spindle 18 is attached to the spindle 18 at a position spaced apart by a predetermined length from the axis of the spindle 18. Therefore, the intermediate member is not limited to the one made of the L-shaped round shaft material as described above.
It may be composed of a rod-like member bent into various shapes, a straight rod-like member that is not bent at all, or a plate-like member of a predetermined shape. It is sufficient that the base end of the signal probe 19 is spaced apart from the axis of the spindle 18 by a predetermined length.

Furthermore, although the touch signal probe 19 is illustrated as a so-called universal touch signal probe,
The type of touch signal probe to be applied is not limited to this, and other types of touch signal probes such as a two-way touch signal probe may be used.

As described above, according to the present invention, a coordinate measuring machine with a wide measurement area can be provided.

[Brief explanation of the drawing]

Figure 1 is a front view showing the overall configuration of a conventional coordinate measuring machine, Figure 2 is a front view showing the overall configuration of an embodiment of the coordinate measuring machine according to the present invention, and Figures 3 and 4 are respectively FIG. 3 is a front view and a side view showing enlarged main parts of the embodiment. 11...Base, 12...Measurement table, 13...
...Column, 15...Horizontal girder, 17...Slider, 1
8... Spindle, 19... Touch signal probe, 21... Intermediate member, 22... Contactor.

Claims (1)

[Scope of utility model registration request] A slider disposed so as to be movable in the X-axis direction and the Y-axis direction, which are substantially horizontal and perpendicular to each other, and a spindle supported by the slider so as to be movable in the Z-axis direction, which is perpendicular to each of the X-axis and the Y-axis. and a touch signal probe attached to the tip of the spindle and capable of measuring in the horizontal direction, the base end of the touch signal probe extending horizontally from the spindle and extending horizontally from the spindle. Adjusting the rotational position of the spindle about its central axis at a position separated by a predetermined length from the axis of the spindle via a substantially L-shaped intermediate member that is curved and directed vertically downward from the horizontal direction. A coordinate measuring machine characterized in that it can be mounted.