JPH02238301A - Comparing measuring jig - Google Patents

Abstract

PURPOSE:To easily compare and measure the relative positional relation between a plurality of mutual measuring regions by mounting a measuring stand holding a work and moving said work so as to separate from and come close to the comparing measuring device. CONSTITUTION:After the zero adjustment of dial gauges 14, 14 is completed, a measuring stand 6 is returned to the position of a two-dot broken line and a mask model W is detached from the space between a fixed sensor 9 and a movable sensor 10 at said position. Next, a work W to be measured is now horizontally held between the fixed sensor 9 and the movable sensor 10 in the same way as the above mentioned master model W and the measuring stand 6 is again moved to the deepest part of a table 2 prescribed by a stopper member. In this case, by reading the graduations of the respective dial gauges 14, 14, the dimensional differences between master models W' at a plurality of regions and the actual work W can be measured at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a comparative measurement jig that is applied when comparatively measuring workpieces.

[Conventional technology]

Generally, as a method for measuring the dimensions of a workpiece, there is a means called comparative measurement, which measures the dimensional difference from a master model.

In this comparison measurement, for example, a master model is placed between a pair of V-blocks, and the zero ft1! ! ! ! I do.

Next, the master model placed on the V block is transferred to the workpiece, and the dimensional difference between the master model and the actual workpiece is measured by reading the scale of the dial gauge at the measurement location on the workpiece. That's what I do.

[Problem to be solved by the invention]

By the way, in the above comparative measurement, when transferring the mask model on the block to the workpiece, the dial gauge must be moved away from the mask model by moving the dial gauge and the block relatively. .

Therefore, when the dial gauge is brought into contact with the workpiece, the posture of the workpiece with respect to the dial gauge may be different from that of the mask model.

In such cases, when comparing the heights of individual parts, there is no problem with the posture of the work relative to the dial gauge, but when measuring the phase difference between multiple cams installed on a camshaft, etc. When comparing and measuring the relative positional relationship between multiple measurement sites, the posture of the workpiece relative to the multiple dial gauges placed corresponding to the multiple measurement sites should be the same as for the mask model above. The process is extremely complicated.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, an object of the present invention is to provide a comparative measurement jig that can easily perform comparative measurements of the relative positional relationships between a plurality of measurement sites.

[Means for Solving the Problems] The comparative measuring jig according to the present invention is a comparative measuring jig applied when measuring a workpiece with a comparative measuring instrument,
A measurement table is provided that holds the workpiece and moves the workpiece toward and away from the comparative measuring device.

[Effect]

According to the above configuration, the workpiece can be moved toward and away from the comparative measuring device without changing the posture of the workpiece relative to the comparative measuring device.

〔Example〕

Hereinafter, the present invention will be described in detail based on drawings showing embodiments.

FIG. 1 conceptually shows a comparison measurement jig according to the present invention, and this measurement jig 1 is equipped with a pair of rail members 3, 3 on the body 2a of a table 2. Rail members 3, 3
As shown in FIG. 2, the upper end portions of the wafers have a shape that bulges out to both sides, and are laid parallel to each other on both side edges of the table 2.

On the other hand, the measurement jig 1 has a rectangular mounting plate 4.
is ringing. The mounting plate 4 has a length sufficient to exceed the distance between the pair of rail members 3.3, and guide members 5, 5 are fixedly installed at both ends of the lower member 4a, respectively. The guide members 5, 5 have respective lower parts 5a,
5a has recesses 5b, 5b opening downward, and the rail members 3,
3, it is slidably fitted.

On the other hand, the measurement jig 1 includes a measurement stand 6. The measuring table 6 has the same shape as the mounting plate 4, and is detachably attached to the upper surface 4b of the mounting plate 4.

Further, a pair of holders 7.8 are arranged in parallel on the measuring table 6 on its body 6a. The holders 7.8 extend vertically from both ends of the measuring table 6, and have insertion holes 7a, 8a in corresponding positions. A fixed center 9 is fitted into the insertion hole 7a formed in one holder 7 with its tip facing toward the other holder 8, and the tip is inserted into the insertion hole 8a formed in the other holder 8. The movable center 10 is slidably inserted in such a state that the movable center 10 faces the tip of the fixed center 9. As is clear from the figure, a coil spring 11 is interposed between the movable center 10 and the holder 8 that supports the center 10, and the movable center 10 is oriented in a direction that brings the movable center 10 closer to the fixed center 9. is constantly under pressure.

Further, the measuring table 6 includes a plurality of block members 12, 12, . . . on its body 6a. These block members 12, 12, . . . ．． 1
V-shaped notch 12 that opens upward in 2a...
b, 12b, .

In the comparison measurement jig 1 configured as described above, the guide members 5, 5 slide on the rail members 3, 3, so that the measurement table 6 is attached to the mounting plate 4, as shown in FIG. is moved on the table 2 in eight directions indicated by arrows in the figure.

At this time, since the measuring table 6 is guided on the rail members 3, 3 via the mounting plate 4 and the guide members 5, 5, its attitude does not change during movement. Further, although not clearly shown in the drawings, stopper members are provided at both ends of the rail members 3, 3, respectively, and the movement range of the measuring table 6 is regulated by these stopper members.

In order to measure the workpiece W using this comparison measurement jig 1, first move the measurement table 6 to the front edge of the table 2, as shown by the 2 points 1'3 line in FIG. The master model W' is held horizontally between the fixed center 9 and the movable center 10.

Next, the measuring table 6 holding this master model W' is
As shown by the solid line in FIG. 1, the table 2 is moved to the innermost part of the table 2, which is regulated by a stopper member (not shown), and at a location corresponding to the measurement part of the workpiece in the master model W',
A dial gauge (comparison measuring device) 14 installed on the body 2a of the table 2 via a magnet 13 is zero-adjusted.

At this time, when comparing and measuring a plurality of parts of the workpiece W, the individual dial gauges 14, 14, . . . are zero-adjusted at locations corresponding to all the parts.

After completing the zero adjustment of the dial gauges 14, 14, etc., return the measuring table 6 to the position shown by the two-dot chain line in FIG. Remove W'.

Next, these fixed center 9 and movable center 10
In the meantime, the workpiece W to be measured is held horizontally in the same way as the master model W', and the measuring table 6 is again moved to the innermost part of the table 2, which is regulated by a stopper member (not shown).

At this time, the workpiece W held on the measuring table 6 is in the same attitude as the master model W' with respect to the plurality of dial gauges 14, 14... By reading the scales of the respective dial gauges 14, 14..., the master model W'
The dimensional difference between the leak W and the actual leak W can be measured at the same time, and the relative positional relationship between these multiple parts can also be measured comparatively.

In the above embodiment, the measuring table 6 is movably disposed via the mounting plate 4, and the measuring table 6 is detachably attached to the mounting plate 4, so that it can be adjusted depending on the type of workpiece to be measured. However, the present invention is not limited to this. Further, the measuring table 6 is configured to move linearly on the rail member 3.3 by the guide members 5, 5, but the present invention is a combination of the guide members 5, 5 and the rail member 3.3. The measuring table 6 does not necessarily have to move in a straight line.

〔Effect of the invention〕

As described above, according to the comparison measurement jig according to the present invention,
Since the workpiece can be moved toward and away from the comparative measuring device without changing the posture of the workpiece relative to the comparative measuring device, it is possible to easily compare and measure the relative positional relationship between a plurality of measurement parts. I can do it.

1... Measuring jig, 6. ... Measuring stand, 14... Comparison measuring instrument, W... Work.

[Brief explanation of drawings]

FIG. 1 is a top view conceptually showing a comparative measurement jig according to the present invention, and FIG. 2 is a cross-sectional view taken along the line ■■ in FIG. Subject of amendment: Detailed description of the invention and drawings in the specification dated 0/1/1999 k'6. Patent Office Official 1. Case Description 2009 Patent Application No. 059.255 2. Relationship with the case involving a person who corrects the name of the invention and a measurement jig

Claims (1)

[Claims] A comparative measuring jig used when measuring a workpiece with a comparative measuring instrument, comprising a measuring stand that holds the workpiece and moves the workpiece toward and away from the comparative measuring instrument. Comparison measurement jig.