JP7235496B2 - HOLE SHAPE MEASURING AND CHECKING DEVICE, HOLE SHAPE MEASURING DEVICE, AND HOLE SHAPE MEASURING METHOD - Google Patents

Description

The present invention relates to a hole shape measuring and checking tool, a hole shape measuring device, and a hole shape measuring method for accurately measuring the shape of a hole drilled in an object to be measured such as an automobile panel.

2. Description of the Related Art A measuring method using a contact-type three-dimensional measuring device is known as a conventional measuring method for long holes formed in a panel of an automobile. A contact-type cubic measuring instrument has, for example, a probe, a probe driving section, a coordinate measuring section, and a measuring operation control section. Then, the probe contacts the surface of the workpiece at a plurality of points, and the coordinates of each contact point are measured by the coordinate measuring section. The measurement operation control section controls the operation of the probe driving section and stores the coordinates measured by the coordinate measurement section.

The measurer compares the measurement result with the design value of the long hole, and if the long hole is normally formed, judges that the process of forming the long hole is normally performed (see, for example, Patent Document 1).

Japanese Patent No. 3606034

In a long hole measuring method using a contact-type three-dimensional measuring device, a probe contacts the surface of a workpiece at a plurality of points to measure the coordinates of each contact position. Therefore, when the object to be measured is the latch hole, the open end of the latch hole is curved, so that the contact point of the probe is not determined, which causes measurement variations.

Similarly, when the object to be measured is a pierced hole, burrs and burrs may occur at the opening edge depending on the direction of the die-cutting during press molding, and the contact point of the probe may not be determined, resulting in measurement variations. There is Also, when the operator measures the pierced hole using a vernier caliper, it is difficult to set the vernier caliper perpendicular to the object to be measured due to the above-mentioned burrs and burrs at the opening end, resulting in measurement variations. There is a problem.

In particular, when the latch hole and the like are manually measured by an operator, there is a problem that the measurement points are likely to vary depending on the operator's sense, and it is difficult to make a stable and accurate determination. As a result, it is necessary to perform re-measurement due to variations in determination results, which poses the problem of poor work efficiency and difficulty in shortening the work time.

The present invention has been made in view of the above circumstances. An object of the present invention is to provide a part shape measuring device and a hole shape measuring method.

In the hole shape measurement checking tool of the present invention, the hole shape is provided with a measuring pin that is inserted into the hole when measuring the shape of the hole with respect to the hole formed in the object to be measured. wherein the measuring pin comprises a main body, an inclined surface formed on the lower end side of the main body, at least a part of which is in contact with the end or the inner surface of the hole, and the main body a flat surface that is an upper surface of the part and is substantially parallel to one main surface of the measurement object; a measurement column formed integrally with the main body on a flat surface, and in a state in which the measurement pin is arranged in the hole so as to be able to measure, the flat surface of the measurement pin serves as a measurement means ; and is used as a first measurement surface for measuring the outer diameter of the hole , and the outer peripheral surface of the measurement columnar portion of the measurement pin is the surface measured by the measurement means and is used as a second measurement surface for measuring the center position of the hole .

Further, in the hole shape measuring checking tool of the present invention, the hole is a latch hole, and the latch hole is an annular shape projecting toward the main surface opposite to the main surface of the object to be measured. and the angle formed between the inclined surface of the measuring pin and the flat surface is substantially the same as the angle formed between the inner surface of the hole and the main surface of the object to be measured. It is characterized by

Further, in the hole shape measurement checking tool of the present invention, an insertion hole is provided on the one main surface side of the object to be measured when measuring the shape of the hole, and into which the measuring pin is inserted. The holder portion has a flat surface substantially parallel to the one main surface of the object to be measured, and the flat surface of the holder portion is a surface to be measured by the measuring means. and is used as a third measurement surface for measuring the outer diameter of the hole.

According to the hole shape measuring apparatus of the present invention, in the hole shape measuring apparatus for measuring the shape of the hole drilled in the object to be measured, the measuring checking tool is in a state of being locked in the hole. measuring means for measuring a measuring pin, storage means for storing at least design data of the hole and measurement data of the measuring pin in a state of being locked in the hole, and calculating using the measurement data, measurement data calculation means for generating calculated measurement data specifying the shape of the hole; and hole shape determination means for comparing the calculated measurement data with the design data of the hole to determine the shape of the hole. , is provided.

Further, in the hole shape measuring method of the present invention, in the hole shape measuring method for measuring the shape of the hole bored in the measurement object using the hole shape measuring device, the measurement object disposing the measuring pin on the upper surface of the object to be measured so that the axis of the hole of the measuring tool and the axis of the measuring pin of the measuring checking tool are substantially aligned; measuring the first measuring surface and the second measuring surface of the measuring pin using the measuring means of the measuring object having an insertion hole into which the measuring pin of the measuring checking tool is inserted; a step of measuring a flat surface of the holder portion arranged on the one main surface of the measurement object or a third measurement surface set on the one main surface of the measurement object; comparing the calculated measurement data calculated by the measurement data calculation means of the hole shape measuring device using the data with the design data of the hole stored in the storage means of the hole shape measuring device; and determining the shape of the hole.

The hole shape measurement checking tool of the present invention comprises a measuring pin that is inserted into the hole when measuring the shape of the hole, the measuring pin having an inclined surface that contacts the end or inner surface of the hole, and a flat surface substantially parallel to one main surface of the measurement object, and the flat surface of the measurement pin is used as a first measurement surface for measuring the outer diameter of the hole. With this structure, by measuring the flat surface of the measuring pin, when measuring the shape of the hole, variations in the measurement points are eliminated, and the shape of the hole can be determined with high accuracy.

Further, in the hole shape measurement checking tool of the present invention, the angle formed by the inclined surface and the flat surface of the measuring pin is substantially the same as the angle formed by the inner surface of the latch hole and one main surface of the object to be measured. be. With this structure, when measuring the outer diameter of the latch hole, the outer diameter of the latch hole can be defined as the diameter of an assumed circle, and the measurement can be performed. can be done.

Further, in the hole shape measurement checking tool of the present invention, the measurement pin has a measurement columnar portion having an axis at the center position of the flat surface, and the outer peripheral surface of the measurement columnar portion is positioned at the center position of the hole portion. is used as a second measurement plane for measuring the With this structure, it is possible to accurately determine the center position of the hole by using the measuring pin.

Further, in the hole shape measuring checking tool of the present invention, the measuring pin has a fixed columnar portion having the same axial center as the measuring columnar portion below the inclined surface, and the fixed columnar portion An engaging portion is formed on the outer peripheral surface of the lower end side of the . With this structure, even if the object to be measured is made of a material that does not magnetize, the shape of the hole can be determined with high accuracy by arranging the measuring pin with high positional accuracy.

Further, the checking tool for measuring the hole shape of the present invention includes a holder portion having an insertion hole into which the measuring pin is inserted, and the flat surface on the upper surface side of the holder portion is used for measuring the outer diameter of the hole portion. 3 measurement surface. With this structure, the holder portion holds the measuring pin with respect to the hole portion with high positional accuracy, and the flat surface of the holder portion is used as the measurement surface, so that the shape of the hole portion can be determined with high accuracy.

Further, the hole shape measurement checking tool of the present invention includes a holder portion having an insertion hole into which a measuring pin is inserted, and one main surface of the object to be measured in the vicinity of the holder portion measures the outer diameter of the hole portion. used as a third measurement plane for With this structure, the holder part holds the measuring pin with high positional accuracy with respect to the hole part, and the shape of the hole part can be determined with high accuracy by measuring the flat surface of one main surface of the object to be measured. .

Further, in the hole shape measuring and checking tool of the present invention, the holder portion and the measuring pin each have a built-in magnet. With this structure, the measuring pin can be fixed to the top surface of the object to be measured by maintaining a predetermined state with respect to the hole of the object to be measured, which can be magnetized, such as a steel plate. can judge.

A hole shape measuring apparatus according to the present invention includes a measurement checking tool having a measuring pin to be locked in a hole, measuring means for measuring the measuring pin in a state of being locked in the hole, and design data of at least the hole. and storage means for storing measurement data of the measuring pin when it is engaged with the hole; measurement data calculation means for calculating using the measurement data and generating calculated measurement data specifying the shape of the hole; and hole shape determination means for determining the shape of the hole by comparing the calculated measurement data and the design data of the hole. With this structure, when measuring the shape of the hole by measuring the flat measuring surface set on the measuring pin or the like with a measuring means such as a three-dimensional measuring device, variations in the measurement points can be minimized. is eliminated, and the shape of the hole can be determined with high accuracy.

Moreover, in the hole shape measuring apparatus of the present invention, the measuring means is a contact or non-contact three-dimensional measuring device. Due to this structure, when using a contact-type three-dimensional measuring device such as a probe, or even when using a three-dimensional measuring device such as a laser measuring device, when measuring the shape of the hole, there is no variation in the measurement location. is eliminated, and the shape of the hole can be determined with high accuracy.

In the hole shape measuring method of the present invention, the step of arranging the measuring pin on the upper surface of the object to be measured so that the axis of the hole of the object to be measured and the axis of the measuring pin of the measurement checking tool are substantially aligned. and determining the shape of the hole by measuring the positional relationship between the outer peripheral surface of the measuring pin and one principal surface of the object to be measured. According to this measuring method, the shape of the hole can be determined with high accuracy by using the measuring pin even in a manufacturing site where no measuring means such as a three-dimensional measuring device is installed.

Further, in the hole shape measuring method of the present invention, the measurement pin is arranged on the upper surface of the object to be measured so that the axis of the hole of the object to be measured and the axis of the measurement pin of the measurement checking tool are substantially aligned. and measuring the first measuring surface and the second measuring surface of the measuring pin using the measuring means of the hole shape measuring device, and setting it to the holder part of the measuring checking tool or one main surface of the object to be measured the calculated measurement data calculated by the measurement data calculation means of the hole shape measuring device and the hole design data stored in the storage means of the hole shape measuring device; comparing and determining the shape of the hole. According to this measurement method, the flat measurement surface set on the measurement pin is measured by a measurement means such as a three-dimensional measuring device. Variation is eliminated, and the shape of the hole can be determined with high accuracy.

1A and 1B are a perspective view and a perspective view, respectively, for explaining a measurement checking tool for measuring a hole shape according to an embodiment of the present invention; FIG. It is (A) sectional drawing, (B) sectional drawing, and (C) sectional drawing explaining the use condition of the measurement checking tool which measures the hole shape which is one Embodiment of this invention. It is (A) sectional drawing, (B) sectional drawing, and (C) sectional drawing explaining the use condition of the measurement checking tool which measures the hole shape which is one Embodiment of this invention. 1(A) and 1(B) are cross-sectional views illustrating a measuring tool for measuring a hole shape according to an embodiment of the present invention. FIG. 1 is a block diagram illustrating a hole shape measuring device that is an embodiment of the present invention; FIG. It is (A) sectional drawing explaining the measuring method of hole shape using the hole shape measuring apparatus which is one Embodiment of this invention, (B) explanatory drawing, (C) sectional drawing, (D) explanatory drawing. .

First, a measurement check tool 10 (hereinafter referred to as "measurement check tool 10") for measuring a hole shape according to an embodiment of the present invention will be described in detail with reference to the drawings. In the description of the present embodiment, in principle, the same reference numbers are used for the same members, and repeated descriptions are omitted.

FIG. 1(A) is a perspective view illustrating a measuring pin 11 that constitutes a measuring checking tool 10 of this embodiment. FIG. 1(B) is a perspective view illustrating the holder portion 12 that constitutes the measuring/checking tool 10 of the present embodiment. 2(A) to 2(C) are cross-sectional views illustrating a state in which the measuring/checking tool 10 of this embodiment is used for the latch hole portion 14A. 3(A) to 3(C) are cross-sectional views illustrating a state in which the measurement/checking tool 10 of this embodiment is used for the pierce hole portion 14B.

A vehicle panel 13, which is one of the objects to be measured, has a large number of holes 14 for assembling vehicle parts, fastening parts, etc., for example, latch holes 14A (see FIG. 2A) and pierce holes. 14B (see FIG. 3A) are formed. Then, it is necessary to measure and determine whether or not the hole portion 14 is formed in the shape of the hole portion according to the design of the vehicle panel 13 in the trial manufacturing process and the inspection process. As the measuring method, for example, a contact-type three-dimensional measuring method using a probe and a non-contact three-dimensional measuring method using a laser measuring device, a scanner measuring device, or the like are known.

In this embodiment, after placing the measurement checking tool 10 in a predetermined state with respect to the hole 14, the shape of the hole 14, for example, the hole 14 and the center position C can be measured easily and accurately. In this embodiment, the contact type three-dimensional measurement method may be used in which a probe is brought into contact with the measuring fixture 10 for measurement.

As shown in FIG. 1(A), the measurement checking tool 10 has a measurement pin 11 . The measuring pin 11 mainly includes an inclined surface 15 engaged with the hole portion 14, a first measuring surface 16 for measuring the outer diameter φ1 of the hole portion 14, and a center position C of the hole portion 14. and a second measurement surface 18 which is the outer peripheral surface of the measurement column 17 for measuring the .

The measuring pin 11 is manufactured by cutting steel, for example, and has a built-in magnet (not shown) therein. With this structure, during measurement, the measuring pin 11 is fixed to the upper surface of the vehicle panel 13 while maintaining a predetermined state with respect to the hole 14 of the vehicle panel 13 that can be magnetized, such as a steel plate.

The measuring pin 11 is processed into various external shapes according to the shape of the hole portion 14 . As shown in the figure, when the shape of the hole portion 14 viewed from above is a circle, a columnar main body portion 11A is formed in accordance with the dimensions of the circular shape. A conical portion 11B on the lower end side of the main body portion 11A is formed with an annular inclined surface 15 consisting of the outer peripheral surface thereof.

The angle θ1 of the inclined surface 15 is arbitrarily set to 30 degrees, 45 degrees, 60 degrees, or the like according to the design shape of the hole 14 to be measured. is shown. Although the details will be described later, the inclined surface 15 contacts the inner surface 31A of the hole 14 and the end 42 (see FIG. 3A), so that the measuring pin 11 is partially inside the hole 14. It is locked in the inserted state. In this embodiment, the angle θ1 of the inclined surface 15 is the angle formed by the inclined surface 15 of the measuring pin 11 and the flat surface 11C, which is the first measuring surface 16. As shown in FIG.

The upper surface of the body portion 11A is formed as a circular flat surface 11C, and the flat surface 11C is used as a first measurement surface 16 for measuring the outer diameter φ1 of the hole portion 14. As shown in FIG. Although the details will be described later, the main body portion 11A of the measuring pin 11 is inserted into the insertion hole 21 (see FIG. 1B) of the holder portion 12 (see FIG. 1B) to perform the first measurement. The surface 16 is substantially parallel to the main surface 13A of the vehicle panel 13 near the hole 14 . Then, by measuring the parallel first measurement surface 16 and the third measurement surface 22 (see FIG. 1B), the outer diameter φ1 of the hole 14 is calculated, and the shape of the hole 14 is calculated. is determined.

The measurement columnar portion 17 is integrally formed on the flat surface 11C of the main body portion 11A. The measurement columnar portion 17 is formed, for example, in a columnar shape, and the axis of the measurement columnar portion 17 is formed so as to coincide with the center position of the flat surface 11C. That is, in the measuring pin 11, as indicated by the dashed line 19, the conical portion 11B where the inclined surface 15 is formed, the body portion 11A, and the measuring columnar portion 17 are aligned with each other. The outer peripheral surface of the measurement columnar portion 17 is used as a second measurement surface 18 for measuring the center position C of the hole portion 14 .

As shown in FIG. 1B, the measuring/checking tool 10 has a holder portion 12. As shown in FIG. The holder portion 12 mainly includes a body portion 20 detachably arranged on the upper surface of the vehicle panel 13, an insertion hole 21 penetrating the body portion 20 in the vertical direction, and an outer diameter φ1 of the hole portion 14. and a third measurement surface 22 for measuring. Note that the holder portion 12 is not an essential component of the measurement/checking tool 10, and in the absence of the holder portion 12 as the measurement/checking tool 10, the main surface 13A of the vehicle panel 13 in the vicinity of the hole portion 14 is the third is used as the measuring surface 22 of the

The holder part 12 is manufactured by cutting a steel material, for example, and has a built-in magnet (not shown) therein. With this structure, during measurement, the holder part 12 is magnetically attached to the vehicle panel 13 such as a steel plate that can be magnetically attached and the measurement pin 11 having a built-in magnet, and maintains a predetermined state with respect to the vehicle panel 13. Fixed.

The body portion 20 has, for example, a cylindrical shape, and the flat surface 20A on the upper surface side and the flat surface 20B on the lower surface side of the body portion 20 are formed substantially parallel to each other. At the time of measurement, by arranging the holder portion 12 on the main surface 13A of the vehicle panel 13, the flat surface 20A of the main body portion 20 becomes a surface substantially parallel to the main surface 13A of the vehicle panel 13. is used as the measuring surface 22 of the As described above, the holder portion 12 is a member that holds the measuring pin 11. Even when the holder portion 12 is used, the main surface 13A of the vehicle panel 13 is used as the third measurement surface 22. good.

The insertion hole 21 penetrates the body portion 20 in the vertical direction and is formed as a cylindrical opening. The holder portion 12 is used to hold the measuring pin 11 (see FIG. 1A) vertically upright with respect to the main surface 13A of the vehicle panel 13 . Therefore, the hole diameter φ2 of the insertion hole 21 is slightly larger than the outer diameter φ3 of the main body portion 11A of the measuring pin 11 . Then, the measuring pin 11 is inserted into the insertion hole 21 while sliding with the outer peripheral surface 11D of the measuring pin 11 contacting the inner peripheral surface 21A of the insertion hole 21 .

FIGS. 2A to 2C show how the measurement checking tool 10 is used when measuring the latch hole portion 14A formed in the vehicle panel 13 in an inspection process or the like. 2B shows a case where the measuring pin 11 and the holder portion 12 are used as the measuring checking tool 10, and FIG. 2C shows a case where only the measuring pin 11 is used as the measuring checking tool 10. .

FIG. 2A shows a latch hole portion 14A formed in the vehicle panel 13 by press working. The latch hole portion 14A has, for example, a circular shape when viewed from above. It is bent at an angle. The latch hole portion 14A may have various shapes such as a round hole shape, an elongated hole shape, a trapezoidal shape, a polygonal hole shape, such as a triangular hole shape, a square hole shape, a pentagonal hole shape, a hexagonal hole shape, etc., depending on the application. processed into

Here, in the latch hole portion 14A, as indicated by a circle 32, the corner portion forming the outer diameter φ1 of the latch hole portion 14A is curved, for example, in order to prevent stress concentration and improve durability. A curved surface 34 with a radius of 0.3 mm is formed. Therefore, when measuring the outer diameter φ1 of the latch hole portion 14A and the center position C, there is a problem that the measurement points are likely to vary with respect to the curved surface 34, and accurate measurement cannot be performed.

Therefore, in the present embodiment, as indicated by the dotted line, an imaginary circle is assumed in which the extended surface of the main surface 13A of the vehicle panel 13 and the extended surface of the inner side surface 31A of the inclined portion 31 intersect, and the latch hole portion 14A is formed. is defined as the diameter of the virtual circle. Similarly, the center position C of the latch hole portion 14A is defined as the center position of the virtual circle. By using a non-contact three-dimensional measuring method using the measuring pin 11, variations in measurement points are eliminated, and the outer diameter φ1 and the center position C of the latch hole portion 14A can be measured with high accuracy.

Specifically, as shown in FIG. 2B, after the vehicle panel 13 is arranged on the upper surface of the inspection table 33, as shown by the dashed line 19, the axis of the insertion hole 21 of the holder portion 12 and the center of the insertion hole 21 are aligned. The holder portion 12 is fixed to the upper surface of the main surface 13A of the vehicle panel 13 so as to be aligned with the axis of the latch hole portion 14A. Then, the measuring pin 11 is slidably inserted into the insertion hole 21 while the outer peripheral surface 11D of the measuring pin 11 and the inner peripheral surface 21A of the insertion hole 21 are in contact with each other.

After that, the inclined surface 15 of the measuring pin 11 comes into contact with the inner side surface 31A of the inclined portion 31 of the latch hole portion 14A, whereby the measuring pin 11 is locked in the latch hole portion 14A. At this time, the measuring pin 11 is also held by the holder portion 12 through the insertion hole 21 . As described above, the measuring pin 11 is inserted into the latch hole portion 14A while being guided by the insertion hole 21, so that the axial center of the measuring pin 11 is also aligned with the latch hole portion 14A as indicated by the dashed line 19. and the axis of the insertion hole 21.

Further, the holder portion 12 is fixed on the main surface 13A of the vehicle panel 13 in a state where the flat surface 20B of the holder portion 12 is in contact with the main surface 13A of the vehicle panel 13, so that the holder portion 12 and the first measurement surface 16 of the measurement pin 11 are substantially parallel to the main surface 13A of the vehicle panel 13 .

That is, the axis of the measurement pin 11 coincides with the axis of the latch hole portion 14A, and the first measurement surface 16 and the third measurement surface 22 are flat surfaces substantially parallel to the main surface 13A of the vehicle panel 13. As a result, measurement variations due to the three-dimensional measurement method are eliminated, and the outer diameter φ1 of the latch hole portion 14A can be calculated with high accuracy. Similarly, the axial center of the measuring pin 11 coincides with the axial center of the latch hole portion 14A, and by measuring the second measurement surface 18, measurement variation due to the three-dimensional measurement method is eliminated, and the latch hole portion 14A can be measured with high accuracy. is calculated.

In the measurement of the latch hole portion 14A, the angle θ1 of the inclined surface 15 of the measuring pin 11 (see FIG. 1A) is the angle θ2 of the inner surface 31A of the inclined portion 31 of the latch hole portion 14A, that is, the latch hole portion The angle .theta.2 between the inner side surface 31A of 14A and the main surface 13A of the vehicle panel 13 is substantially the same as the angle .theta.2. When the latch hole portion 14A is formed as designed, the inclined surface 15 of the measuring pin 11 in the portion inserted into the insertion hole 21 extends over substantially the entire inner surface 31A of the latch hole portion 14A. Contact. In this case, without using the holder portion 12, the axial center of the measuring pin 11 and the axial center of the latch hole portion 14A are aligned as indicated by the dashed line 19. FIG.

On the other hand, as shown in FIG. 2(C), even when measuring the outer diameter φ1 and the center position C of the latch hole portion 14A by a non-contact three-dimensional measuring method using only the measuring pin 11 as the measuring checking tool 10, good. As described above, since the measurement pin 11 has a built-in magnet, the measurement pin 11 stands alone in the vertical direction with respect to the main surface 13A of the vehicle panel 13 during measurement. You can also In this case, by using the main surface 13A of the vehicle panel 13 as the third measurement surface 22, a non-contact three-dimensional measurement method can be used.

FIGS. 3A to 3C show how the measuring/checking tool 10 is used when measuring the pierced hole portion 14B formed in the vehicle panel 13 in an inspection process or the like. 3B shows a case where the measurement pin 11 and the holder portion 12 are used as the measurement checking tool 10, and FIG. 3C shows a case where only the measurement pin 11 is used as the measurement checking tool 10. . In the measurement of the pierce hole portion 14B, the measuring pin 11 having a desired angle θ1 (see FIG. 1A) can be used according to the size of the outer diameter φ1 of the pierce hole portion 14B.

FIG. 3A shows a pierce hole portion 14B formed in the vehicle panel 13 by press working. The pierced hole portion 14B has, for example, a circular shape when viewed from above, and the pierced hole portion 14B is an opening punched in a substantially circular shape in the thickness direction of the vehicle panel 13 . The pierced hole portion 14B has various shapes such as a round hole shape, a long hole shape, a trapezoidal shape, a polygonal hole shape, for example, a triangular hole shape, a square hole shape, a pentagonal hole shape, a hexagonal hole shape, etc., depending on the application. processed into

Here, in the pierce hole portion 14B, as indicated by a circle 41, burrs or burrs may occur at the end portion 42 of the pierce hole portion 14B depending on the die-cutting direction during press working. If the burr or the like is generated, there is a problem that measurement points are likely to vary when measuring the outer diameter φ1 and the center position C of the pierce hole portion 14B, and accurate measurement cannot be performed.

Therefore, in the present embodiment, by using a non-contact three-dimensional measuring method using the measuring pin 11, variations in the measurement points are eliminated, and the outer diameter φ1 and the center position C of the piercing hole portion 14B can be measured with high accuracy. be able to.

Specifically, as shown in FIG. 3B, after the vehicle panel 13 is arranged on the upper surface of the inspection table 33, as shown by the dashed line 19, the axis of the insertion hole 21 of the holder portion 12 and the center of the insertion hole 21 are aligned. The holder portion 12 is fixed to the upper surface of the main surface 13A of the vehicle panel 13 so as to be aligned with the axis of the pierce hole portion 14B. Then, the measuring pin 11 is slidably inserted into the insertion hole 21 while the outer peripheral surface 11D of the measuring pin 11 is in contact with the inner peripheral surface 21A of the insertion hole 21 .

After that, the inclined surface 15 of the measuring pin 11 comes into contact with the end portion 42 of the pierce hole portion 14B, whereby the measuring pin 11 is locked to the pierce hole portion 14B. At this time, the measuring pin 11 is held by the holder portion 12 through the insertion hole 21 . As described above, the measuring pin 11 is inserted into the pierce hole portion 14B while being guided by the insertion hole 21, so that the axial center of the measuring pin 11 is also aligned with the pierce hole portion 14B as indicated by the dashed line 19. and the axis of the insertion hole 21.

Further, the holder portion 12 is fixed on the main surface 13A of the vehicle panel 13 in a state where the flat surface 20B of the holder portion 12 is in contact with the main surface 13A of the vehicle panel 13, so that the holder portion 12 and the first measurement surface 16 of the measurement pin 11 are substantially parallel to the main surface 13A of the vehicle panel 13 .

That is, the axis of the measurement pin 11 coincides with the axis of the pierce hole portion 14B, and the first measurement surface 16 and the third measurement surface 22 are flat surfaces substantially parallel to the main surface 13A of the vehicle panel 13. As a result, measurement variations due to the three-dimensional measurement method are eliminated, and the outer diameter φ1 of the pierce hole portion 14B can be calculated with high accuracy. Similarly, the axial center of the measuring pin 11 coincides with the axial center of the pierce hole portion 14B, and by measuring the second measurement surface 18, the measurement variation due to the three-dimensional measurement method is eliminated, and the pierce hole portion 14B is measured with high accuracy. is calculated.

As described above, since the measuring pin 11 and the holder portion 12 each have a built-in magnet, the measuring pin 11 and the holder portion 12 are in a predetermined state on the main surface 13A of the vehicle panel 13 during measurement. is fixed while maintaining

On the other hand, as shown in FIG. 3(C), even when measuring the outer diameter φ1 and the center position C of the piercing hole portion 14B by a non-contact three-dimensional measuring method using only the measuring pin 11 as the measuring checking tool 10, good. As described above, since the measurement pin 11 has a built-in magnet, the measurement pin 11 stands alone in the vertical direction with respect to the main surface 13A of the vehicle panel 13 during measurement. You can also In this case, by using the main surface 13A of the vehicle panel 13 as the third measurement surface 22, a non-contact three-dimensional measurement method can be used.

Next, FIGS. 4A and 4B show a measuring pin 51 used when the vehicle panel 13 is made of a material such as aluminum that cannot be magnetized. FIG. 4A is a cross-sectional view for explaining how the shape of the pierced hole portion 14B is measured using the measuring pin 51. As shown in FIG. FIG. 4B is a cross-sectional view for explaining how the locking portion 54 of the measuring pin 51 is locked.

In describing the measuring pin 51, the same reference numerals are assigned to the same components as those of the measuring pin 11 described with reference to FIGS. . Moreover, the measuring pin 51 is not only used for measuring the shape of the pierce hole portion 14B, but can also be used for measuring the shape of the latch hole portion 14A.

As shown in FIG. 4A, the measuring pin 51 mainly measures the inclined surface 15 engaged with the pierce hole portion 14B and the outer diameter φ1 of the pierce hole portion 14B (see FIG. 3A). a first measurement surface 16 for measuring the center position C (see FIG. 3A) of the pierce hole portion 14B, and a second measurement surface that is the outer peripheral surface of the measurement columnar portion 17 and the measurement columnar portion 17 for measuring the center position C (see FIG. 3A) 18 , a fixed columnar portion 53 for fixing the measuring pin 51 to the inspection table 52 , and a locking portion 54 formed on the lower end side of the fixed columnar portion 53 .

Since the measuring pin 51 is used when the vehicle panel 13 is made of a non-magnetizable material such as aluminum, the measuring pin 51 does not contain a magnet. Therefore, the measuring pin 51 is formed with a fixed columnar portion 53 for fixing to the inspection table 52 and a locking portion 54 formed on the lower end side of the fixed columnar portion 53 .

The measuring pin 51 is manufactured by cutting a steel material, for example, and a fixed columnar portion 53 is formed on the lower side of the inclined surface 15 . As indicated by the dashed line 19, the axis of the fixed columnar portion 53 is formed so as to substantially coincide with the axes of the main body portion 11A and the conical portion 11B. The fixed columnar portion 53 is formed, for example, in a columnar shape, and the lower end surface 53A of the fixed columnar portion 53 is formed as a flat surface substantially parallel to the first measurement surface 16 .

A locking portion 54 is formed on the outer peripheral surface of the fixed columnar portion 53 on the lower end side. In the present embodiment, the locking portion 54 has, for example, a male thread shape, and is attached to the female thread shape of the fixing hole 52A (see FIG. 4(B)) of the inspection table 52 . Note that the shape of the locking portion 54 is not limited to the screw shape described above, and may be any structure as long as the measuring pin 51 is locked to the fixing hole 52A of the inspection table 52 .

FIG. 4(B) shows an enlarged view of the area indicated by the circle 55 in FIG. 4(A). is shown. As shown, in the fixing hole 52A, the internal thread shape of the fixing hole 52A and the external thread shape of the engaging portion 54 have a clearance W1 of about 0.5 mm, for example. Further, as shown in FIG. 4A, the vehicle panel is mounted so that the axis of the fixing hole 52A of the inspection table 52 coincides with the axis of the pierce hole portion 14B, as indicated by the dashed line 19. 13 is arranged on the inspection table 52 .

With this structure, the inclined surface 15 of the measuring pin 51 contacts the end portion 42 (see FIG. 3A) of the pierce hole portion 14B, thereby locking the measuring pin 51 to the pierce hole portion 14B. At this time, the locking portion 54 of the fixed columnar portion 53 is fitted into the fixing hole 52A of the inspection table 52 at the same time, so that the measurement pin 51 is held on the inspection table 52 . As described above, since the clearance W1 is provided in the fixing hole 52A, the axial center of the measuring pin 51 is prevented from being inclined due to the fitting state of the locking portion 54. As shown in FIG. As a result, the measurement pin 51 is in contact with the end portion 42 of the pierce hole portion 14B so that the axis of the measurement pin 51 is positioned vertically with respect to the main surface 13A of the vehicle panel 13 during measurement. fixed accordingly.

Next, a hole shape measuring device 60 and a hole shape measuring method according to another embodiment of the present invention will be described in detail with reference to the drawings. In describing the present embodiment, the description of the measurement/checking tool 10 and the like described with reference to FIGS. Description is omitted.

FIG. 5 is a block diagram illustrating the hole shape measuring device 60 of this embodiment. FIG. 6A is a cross-sectional view showing how the shape of the pierced hole portion 14B is measured using the measuring pin 11. FIG. FIG. 6B is a calculation table for explaining the calculation method in the hole shape measuring device 60. As shown in FIG. FIG. 6C is a cross-sectional view showing how the shape of the pierced hole portion 14B is measured using the measuring pin 51. As shown in FIG. FIG. 6D is a calculation table for explaining the calculation method in the hole shape measuring device 60. FIG.

As shown in FIG. 5, the hole shape measuring device 60 mainly includes the measuring/checking tool 10, the control unit 61, the measuring means 62, the storage means 63, the measurement data calculating means 64, and the hole shape determining means. 65 and . The memory means 63 , the measurement data calculation means 64 and the hole shape determination means 65 are provided inside the control unit 61 .

The control unit 61 is an electronic control unit (ECU) that includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and executes various calculations. A personal computer (not shown) may be used as the control unit 61 to control the measuring means 62 .

The measurement means 62 is, for example, a probe that directly contacts the measurement surface of the measurement checking tool 10 when performing contact-type three-dimensional measurement. On the other hand, the measuring means 62 is, for example, a laser measuring device or a scanner measuring device for measuring the measurement surface of the measurement checking tool 10 when non-contact three-dimensional measurement is performed. The measuring means 62 measures a plurality of points on each of the first to third measuring surfaces 16, 18, 22 provided on the measuring checking tool 10 or the like.

The storage means 63 stores various data necessary for determining the shape of the hole 14 , such as design data of the hole 14 . The design data of the holes 14 is, for example, design data for each size and shape of each hole 14 including tolerance. The storage means 63 also stores calculation table data, which will be described later with reference to FIGS. 6(B) and 6(D).

The measurement data calculation means 64 causes the storage means 63 to store the measurement data obtained by measuring the first to third measurement surfaces 16 , 18 and 22 measured by the measurement means 62 . Then, the measurement data calculation means 64 calculates the outer diameter φ1 of the hole portion 14 using the measurement data of the first and third measurement surfaces 16 and 22, and calculates the calculated outer diameter φ1 of the hole portion 14. is stored in the storage means 63. On the other hand, the center position C of the hole 14 is calculated using the measurement data of the second measurement surface 18 , and the calculated measurement data of the center position C of the hole 14 is stored in the storage means 63 .

The hole shape determination means 65 compares the calculated measurement data with the design data and calculation table data of the hole 14, and if the calculated measurement data falls within the range of the design data of the hole 14, It notifies that the shape of the hole 14 is normal. On the other hand, if the calculated measurement data does not fall within the range of the design data of the hole 14, it is notified that the shape of the hole 14 is defective.

For example, referring to FIGS. 6A and 6B, a situation in which the shape of the pierced hole portion 14B is measured using the measuring pin 11 and the holder portion 12 will be described. For the description of the measuring pin 11 and the holder portion 12, refer to the description given above with reference to FIGS. 1 to 3, and the repeated description will be omitted. Moreover, the measuring pin 11 and the holder portion 12 are used not only when measuring the shape of the pierce hole portion 14B, but also when measuring the shape of the latch hole portion 14A (see FIG. 2A). be able to.

In FIG. 6B, the horizontal axis of the calculation table indicates the size of the outer diameter φ1 of the pierce hole portion 14B, and the vertical axis of the calculation table indicates the length in the height direction of the outer diameter φ1 of the pierce hole portion 14B on the horizontal axis. It shows the numerical value converted to The length in the height direction is the length in the height direction from the third measurement surface 22 of the holder portion 12 to the first measurement surface 16 of the measurement pin 11 . Further, the straight lines described in the calculation table are lines corresponding to the angle θ1 of the inclined surface 15 of the measuring pin 11 (see FIG. 1A).

First, the measurement means 62 (see FIG. 5) measures the first measurement surface 16 of the measurement checking tool 10 and the third measurement surface 22 of the holder portion 12 at multiple points. Next, the measurement data calculation means 64 uses the length in the height direction obtained from the measurements of the first and third measurement surfaces 16 and 22 and the angle θ1 of the inclined surface 15 of the measurement pin 11 used. , to generate calculated measurement data for calculating the outer diameter φ1 of the pierce hole portion 14B. Next, the hole shape determining means 65 determines whether or not the calculated measurement data falls within the range of the design data of the pierce hole portion 14B, and notifies the determination result.

For example, in the hole shape determining means 65, the outer diameter φ1 of the measuring pin 11 is 8.0 mm, the angle of the inclined surface 15 is 45 degrees, and the length from the third measuring surface 22 to the first measuring surface 16 is When the measured value is 1.5 mm, the measured value agrees with the converted numerical value, the pierce hole portion 14B is formed according to the designed value, and the judgment is good. On the other hand, if the measured value is smaller than 1.5 mm, there is a possibility that the pierced hole portion 14B is formed larger than the design value, and the determination is negative. Further, if the measured value is larger than 1.5 mm, there is a possibility that burrs or the like are generated at the end portion of the pierce hole portion 14B, resulting in a negative determination.

If the above determination result is negative, the worker can assume that there is a burr or the like at the end portion 42 of the pierce hole portion 14B, and can inspect the measured pierce hole portion 14B again. .

Even at a manufacturing site where the hole shape measuring device 60 is not installed, the operator can visually check the shape of the piercing hole 14B at the manufacturing site using the measuring pin 11 and the holder 12. can also As shown in FIG. 6A, after the measuring pin 11 and the holder portion 12 are placed on the vehicle panel 13 with good positional accuracy, the operator visually confirms the weight of the inclined surface 15 of the measuring pin 11. When the outer diameter of the pierce hole portion 14B is 8.0 mm as designed, the determination is good.

Also, for example, a situation in which the shape of the pierce hole portion 14B is measured using the measuring pin 51 will be described with reference to FIGS. 6(C) and 6(D). For the description of the measuring pin 51, refer to the description given above with reference to FIGS. 4A and 4B, and repeated description will be omitted. The measuring pin 51 is used not only for measuring the shape of the pierce hole portion 14B, but can also be used for measuring the shape of the latch hole portion 14A (see FIG. 2A).

In FIG. 6D, the horizontal axis of the calculation table indicates the size of the outer diameter φ1 of the pierce hole portion 14B, and the vertical axis of the calculation table indicates the length of the outer diameter φ1 of the pierce hole portion 14B on the horizontal axis in the height direction. It shows the numerical value converted to The length in the height direction is the length in the height direction from the third measurement surface 22 of the vehicle panel 13 to the first measurement surface 16 of the measurement pin 11 . The straight lines described in the calculation table correspond to the angle θ1 of the inclined surface 15 of the measuring pin 51 (see FIG. 1A).

6A and 6B, the measurement means 62 (see FIG. 5) measures the first measurement surface 16 of the measurement checking tool 10 and the third measurement surface 16 of the vehicle panel 13. are measured at a plurality of points on the measurement surface 22 of . Thereafter, the measurement data calculation means 64 and the hole shape determination means 65 perform calculations using the calculation table data and the design data stored in the storage means 63 to determine the shape of the pierce hole portion 14B. For example, if the outer diameter φ1 of the measuring pin 51 is 8.0 mm, the angle of the inclined surface 15 is 45 degrees, and the measured value from the third measuring surface 22 to the first measuring surface 16 is 5.5 mm, , the measured value agrees with the converted numerical value, and the pierce hole portion 14B is formed according to the designed value, which is a good judgment.

Finally, a hole shape measuring method using the hole shape measuring device 60 will be described with reference to FIGS. 2(B) and 5. FIG. In the following description, the case of measuring the shape of the latch hole portion 14A will be described using FIG. be.

In the hole shape measuring method, as shown in FIG. 2B, the measuring pin 11 and the holder portion 12, which are the measuring checking tool 10, are arranged in a predetermined state at the time of measurement with respect to the latch hole portion 14A of the vehicle panel 13. set up. Then, using a measuring means 62 (see FIG. 5) such as a laser measuring device or a scanner measuring device, the first to third measuring surfaces 16, 18, 22 of the measuring pin 11, etc. are measured by a non-contact three-dimensional measuring method. By measuring , it is determined whether or not the shape of the latch hole portion 14A is processed in the vehicle panel 13 as designed.

Specifically, after the vehicle panel 13 is arranged on the upper surface of the inspection table 33, the axis of the insertion hole 21 of the holder part 12 and the axis of the latch hole part 14A are aligned as indicated by the dashed line 19. The holder portion 12 is fixed to the upper surface of the main surface 13A of the vehicle panel 13 so as to match. Then, the measuring pin 11 is slidably inserted into the insertion hole 21 while the outer peripheral surface 11D of the measuring pin 11 and the inner peripheral surface 21A of the insertion hole 21 are in contact with each other.

After that, the inclined surface 15 of the measuring pin 11 comes into contact with the inner side surface 31A of the inclined portion 31 of the latch hole portion 14A, whereby the measuring pin 11 is locked in the latch hole portion 14A. At this time, the measuring pin 11 is also held by the holder portion 12 through the insertion hole 21 . As described above, the measuring pin 11 is inserted into the latch hole portion 14A while being guided by the insertion hole 21, so that the axial center of the measuring pin 11 is also aligned with the latch hole portion 14A as indicated by the dashed line 19. and the axis of the insertion hole 21.

Next, the measuring means 62 measures the first to third measuring surfaces 16 , 18 , 22 . As described above, by aligning the axial center of the measuring pin 11 with the axial center of the latch hole portion 14A and the axial center of the insertion hole 21, the first measuring surface 16 of the measuring pin 11 and the third measuring surface 16 of the holder portion 12 are aligned. The measurement surface 22 is substantially parallel to the main surface 13A of the vehicle panel 13 . By measuring the flat first and third measurement surfaces 16 and 22 with the measurement means 62 in this installation state for measurement, variations in measurement points are eliminated, and a plurality of highly accurate measurement data can be obtained. In the measurement of the second measurement surface 18 as well, it is possible to obtain a plurality of highly accurate measurement data due to the coincidence of the axes.

After that, the measurement data calculation means 64 performs calculations using the plurality of measurement data, and generates calculation measurement data of the calculated outer diameter φ1 and the center position C of the latch hole portion 14A. After that, the hole shape determination means 65 performs calculations using the calculation table data in the storage means 63, the design data of the latch hole portion 14A, and the calculated measurement data, and determines whether the shape of the latch hole portion 14A is processed as designed. , or not.

In the present embodiment, the hole shape measuring device 60 is used to determine whether the shape of the hole 14 is good or bad by a contact or non-contact three-dimensional measuring method. not something to do. For example, even in a manufacturing site where the measuring means 62 of the hole shape measuring device 60 is not installed, the measuring pin 11 is arranged in the hole 14 of the vehicle panel 13, and the measuring pin 11 is formed on the inclined surface 15. It is also possible to determine the quality of the shape of the hole 14 by visually checking the weight. In addition, various modifications are possible without departing from the gist of the present invention.

REFERENCE SIGNS LIST 10 hole shape measurement checker 11, 51 measurement pin 11C flat surface 12 holder portion 13 vehicle panel 13A principal surface 14 hole portion 14A latch hole portion 14B pierce hole portion 15 inclined surface 16 first measurement surface 17 measurement columnar portion 18 second measurement surface 20A, 20B flat surface 21 insertion hole 21A inner peripheral surface 22 third measurement surface 31 inclined portion 31A inner surface 33, 52 inspection table 42 end portion 52A fixing hole 53 fixing columnar portion 54 locking portion 60 hole shape measuring device 61 control unit 62 measurement means 63 storage means 64 measurement data calculation means 65 hole shape determination means

Claims (5)

A hole shape measurement checking tool comprising a measuring pin inserted into a hole formed in an object to be measured when measuring the shape of the hole ,
The measuring pin is
a main body;
an inclined surface formed on the lower end side of the body portion, at least a part of which contacts the end portion or the inner side surface of the hole portion;
a flat surface that is the upper surface of the main body and is substantially parallel to one main surface of the measurement object;
a measurement column having an axis at the center position of the flat surface, inside an end of the flat surface, and formed integrally with the main body on the flat surface;
In a state in which the measuring pin is arranged in the hole so as to be able to measure,
The flat surface of the measuring pin is a surface to be measured by a measuring means and is used as a first measuring surface for measuring the outer diameter of the hole ,
A hole portion characterized in that an outer peripheral surface of the measurement columnar portion of the measurement pin is a surface to be measured by the measurement means, and is used as a second measurement surface for measuring the center position of the hole portion. Shape measurement checker. the hole portion is a latch hole, the latch hole is formed in an annular inclined portion protruding toward the other main surface side opposite to the one main surface of the object to be measured;
3. An angle formed between the inclined surface and the flat surface of the measuring pin is substantially the same as an angle formed between the inner surface of the hole and the one main surface of the object to be measured. 1. The hole shape measurement checking tool according to 1. further comprising a holder portion disposed on the one main surface side of the measurement object when measuring the shape of the hole portion and having an insertion hole into which the measurement pin is inserted;
The holder part has a flat surface substantially parallel to the one main surface of the object to be measured,
1 or 2 , wherein the flat surface of the holder portion is a surface to be measured by the measuring means, and is used as a third measurement surface for measuring the outer diameter of the hole portion. 2. The hole shape measurement checking tool according to 2 above. A hole shape measuring device for measuring the shape of the hole drilled in the measurement object using the measurement checking tool according to claim 1 or claim 2 ,
measuring means for measuring the measuring pin of the measuring checking tool in a state of being locked in the hole;
a storage means for storing at least design data of the hole and measurement data of the measuring pin in a state of being engaged with the hole;
measurement data calculation means for performing calculations using the measurement data to generate calculation measurement data specifying the shape of the hole;
A hole shape measuring device, comprising: hole shape determining means for determining the shape of the hole by comparing the calculated measurement data with the design data of the hole. A hole shape measuring method for measuring the shape of the hole drilled in the measurement object using the hole shape measuring device according to claim 4 ,
disposing the measurement pin on the upper surface of the measurement object such that the axis of the hole of the measurement object substantially coincides with the axis of the measurement pin of the measurement checking tool;
The first measuring surface and the second measuring surface of the measuring pin are measured using the measuring means of the hole shape measuring device, and an insertion hole into which the measuring pin of the measuring checking tool is inserted is formed. a step of measuring a flat surface of a holder portion arranged on the one main surface of the object to be measured or a third measurement surface set on the one main surface of the object to be measured;
The calculated measured data calculated by the measured data calculating means of the hole shape measuring device using the measured data measured by the measuring means and the hole stored in the storage means of the hole shape measuring device and determining the shape of the hole by comparing the design data of the hole.

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