JPS6321000Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a model work for testing a coordinate measuring machine.

Today, touch signal probes are installed to be movable in three-dimensional directions, and are brought into contact with the surface to be measured of a workpiece fixed on a surface plate, and by repeating this process, the shape and dimensions of the workpiece can be measured. The original measuring machine was used in an era where high precision measurement was required.
It is becoming more and more popular and expanding.

This type of measuring device is integrally constructed with a data processing device such as a computer that performs desired arithmetic processing in order to improve measurement efficiency or grasp specific data. Therefore, in order to truly achieve high accuracy and labor savings in measuring the coordinates, dimensions, shape, etc. of a workpiece, it is necessary to understand and operate the sophisticated program.

However, with a three-dimensional measuring machine, it is difficult to understand the program, as it takes a considerable number of days. This is because it must be closely related to actual measurement using a touch signal probe for high accuracy, and is different from general computer operation using only key operations.

Here, the inventors of the present invention analyzed the problem as follows through numerous training sessions regarding this point. In other words, when training on three-dimensional measuring machines, the workpieces used are products in the factory, such as engine bodies, and the workpieces are used for both basic and high-order measuring surfaces. There are many cases where both are mixed, or where most of the basic measurement target surfaces are missing.

On the other hand, there are a large number of protrusions and holes that are more than necessary, making it difficult to decide which one to choose. This requires excessive effort in repeated measurement testing.

The workpiece is too heavy and it takes a long time to set it up on the surface plate. Furthermore, in the case of long dimensions, test measurements cannot be made at one location.

The measurement location may have dimensions that are too small for the probe used, for example the measurement hole.

Quantitative standard values such as surface roughness and waviness may not be known.

Even items that satisfy the shape may be soft and weak.

Therefore, it is not possible to slide sequentially from the basic course to the advanced course depending on the training stage, and
Even within the course, the training cannot be carried out in the order of the basic text, requiring a long time for training as a whole, and including many items that cannot be measured, resulting in the inability to fully utilize the functions of the coordinate measuring machine. ing.

An object of the present invention is to eliminate such inconveniences and to provide a test model work that allows the user to learn contour measurement operations using a three-dimensional measuring machine.

Therefore, in the present invention, touch signal probes movable in three-dimensional directions are sequentially brought into contact with the surface to be measured, and the shape and dimensions of the object are measured from the position of the touch signal probe at the time of contact. This is a model work for teaching how to use a measuring machine, and the bottom part is a horizontal plane, and the upper part has a curved upright surface that is a combination of a plane part parallel to the horizontal plane and a curved surface orthogonal to this plane part and having a different radius of curvature. , and a vertical hole defining the reference position of the shape surrounded by the curved upright surface, thereby attempting to achieve the above object.

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

FIG. 1 is a perspective view showing the model work of this embodiment, FIG. 2 is a plan view thereof, and FIG. 3 is a bottom view thereof. In these figures, the workpiece body 1 is formed from a relatively lightweight material into a flat rectangular parallelepiped shape of a size suitable for handling. In other words, bottom 1
A and the upper part 1B are on a horizontal plane parallel to each other, and the front side 1C, the left side side 1D, and the right side side 1E forming the peripheral surface part
Adjacent back surfaces 1F are formed into vertical planes that are perpendicular to each other and perpendicular to the bottom portion 1A and the top portion 1B.

As shown in FIG. 2, the planar part of the upper part 1B of the model work body 1 has gourd-shaped grooves 12 at approximately the center of the three corners, and the grooves 12 in the shape of a gourd at the three corners of the upper part 1B and approximately the center of the protrusion 13 surrounded by the grooves 12. Vertical circular holes 11 and 14 that define the reference position of the shape of the groove 12 are formed at the center of both sides, and an insertion groove 15 that communicates with the groove 3 from both side surfaces 1D and 1E of the work body 1 is formed, respectively. Both side surfaces of the groove 12 are formed into endless curved upright surfaces 12A and 12B, which are a combination of curved surfaces parallel to each other, orthogonal to the flat surface of the upper portion 1B, and having different radii of curvature.

The one curved upright surface 12A is connected to the circular hole 1.
A curved surface C _{1 with a radius R 1 centered on a point P 1 that has been moved a distance L 1 from the} center point P 0 of 4 in the -X axis direction, and a curved surface C ₁ that has been moved a distance L ₂ from the center point P ₀ in the +X axis direction. A curved surface C ₂ with radius R ₂ centered on point P ₂ , a curved surface C ₃ connecting one end of both curved surfaces C ₁ and C ₂ , and both curved surfaces
It is composed of a curved surface C ₄ connecting the other ends of C ₁ and C ₂ . The other curved upright surface 12B has a curved surface c 1 with a radius r ₁ centered on the point P ₁ and a curved surface c ₁ with a radius r 1 centered on the point P ₂ .
A curved surface c ₂ with radius r centered at , and both of these curved surfaces c ₁ ,
It is composed of a curved surface c ₃ that connects one end of c ₂ and a curved surface c ₄ that connects the other ends of both curved surfaces c ₁ and c ₂ .

Next, we will describe an example of training on operating procedures for a coordinate measuring machine using this model work. During the training, the bottom part 1A of the work body 1 should be replaced with the upper part 1, for example.
Once set on the surface plate of a coordinate measuring machine using the circular hole 11 penetrating from B to the bottom 1A, it is possible to mainly measure the contour shape of a curved surface.

To measure the contour of a curved surface, specify the corresponding measurement mode, or select the program, and then insert the probe of the touch signal probe of the coordinate measuring machine into either of the circular holes 11 or 14 in the workpiece body 1. After that, it is brought into contact with three points on the inner peripheral surfaces of the circular holes 11 and 14. Then, in the data processing device of the three-dimensional measuring machine, the center coordinates P ₀ of the circular holes 11 and 14 are calculated from the coordinate positions of the three points in contact with the tracing stylus, and the center coordinates P ₀ are registered as the origin.

After that, after positioning the measuring tip of the touch signal probe in the groove 12 through the insertion groove 15 of the workpiece body 1, the curved upright surface 12 of either one of the grooves 12
When the contact point is moved along the groove 12 while in contact with A and 12B or at predetermined pitches, the coordinates of the contact points are sequentially captured, and these position coordinates form a continuous curve. It is required as. Here, if measurements in the vertical direction of the curved upright surfaces 12A and 12B are combined, the curved upright surface 12
The cylindricity of A and 12B can also be measured.
In this way, the measurement operation of the curved surface contour shape is performed. In addition, if you use the flat part of the upper part 1B,
The contour shape of the flat portion can be measured.

After specifying the measurement mode for hole measurement, insert the probe of the touch signal probe into one of the circular holes 11 and 14 in the workpiece body 1, and make it contact three points on the inner peripheral surface of the hole. For example, the inner diameter and center coordinates of the hole can be measured from the coordinate positions of the three points in contact with the probe. Here, if the mode for determining the distance between the center coordinates of the two circular holes is specified, the distance between the centers of the two circular holes can be determined.

In addition, the front 1C and back 1F of the work body 1
By using the gap or between the two side surfaces 1D and 1E, the dimension between the outer surfaces can be measured, and by using the space between the surface plate and the top surface 1B, the height can also be measured.

Therefore, according to this embodiment, since it is configured as described above, the contour shape of the inner curved surface and the outer curved surface can be measured by the coordinate measuring machine by simply setting the work body 1 on the coordinate measuring machine once. Can be implemented.

Moreover, since the face-to-face dimensions of the workpiece body 1 and the shapes of the curved upright surfaces 12A and 12B are known in advance,
By comparing with the values obtained by these measurements, it can be confirmed whether the measurement procedure up to that point is correct.

In addition, since the workpiece body 1 is made of a relatively lightweight material such as acrylic resin and has an appropriate size, the workpiece body 1 can be easily attached and removed, and all measurements can be carried out in a fixed position. Not only can this be done, but it can also be manufactured at low cost.

In addition, in the above embodiment, the curved upright surfaces 12A, 1
Although 2B is made endless, it does not necessarily have to be endless. Further, the test model work of the present invention is not limited to the form of the above-mentioned embodiments, but may be any model work as long as it can measure at least the contour shape.

As described above, according to the present invention, it is possible to provide a test model work that allows the user to learn how to measure curved surface contours using a coordinate measuring machine.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Figure 1 is a perspective view, Figure 2 is a top view, Figure 3 is a bottom view, and Figure 4 is a bottom view.
5 is a sectional view taken along the line -- in FIG. 2, FIG. 5 is a sectional view taken along the line -- in FIG. 2, and FIG. 1...Work body, 1A...Bottom, 1B...Top, 12...Shaft, 12A, 12B...Curved upright surface, 13...Protrusion, 14...Circular hole.

Claims (1)

[Claims for Utility Model Registration] Touch signal probes movable in three-dimensional directions are sequentially brought into contact with the surface to be measured, and the shape, dimensions, etc. of the object to be measured are measured from the position of the touch signal probes at the time of contact. This is a model work for teaching how to use a three-dimensional measuring machine, in which the bottom part is a horizontal plane, and the top part is a curved erected plane that combines a plane part parallel to the horizontal plane and a curved surface perpendicular to this plane part and with a different radius of curvature. A model work for testing a three-dimensional measuring machine characterized by having a surface and a vertical hole that defines a reference position of a shape surrounded by the curved upright surface.