JPH0642161Y2 - Apex measuring aid - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention accurately determines a curved surface vertex position (intersection position of tangent planes) of an object having a curved surface portion such as a press-bent product (hereinafter referred to as a curved surface processed product). The present invention relates to an apex measurement auxiliary tool for measuring.

[Prior art]

Conventionally, the position of the apex of the curved surface of the curved surface workpiece (the position of the intersection of the tangent planes inscribed or circumscribed on the curved surface) is performed by the method shown in FIGS. 12 to 14.

First, as shown in FIG. 12, a plastic sticky substance such as clay is attached to the curved surface apex position P of the curved surface processed product 9 or the back surface side of the curved surface apex position P.

Then, as shown in FIG. 13, a scale Q is formed on the plastic adhesive material 8 by applying the scale 7 to the plastic adhesive material 8 from both directions A and B, respectively.

Next, as shown in FIG. 14, the tip portion of the scriber 6 having a clear positional relationship with the reference plane L (not shown) is applied to the vertex Q. Then, the distance from the vertex Q to the reference plane L is obtained from this. That is, the curved workpiece 9 is placed on a surface plate (not shown), and the measurement reference plane L of the tip of the scriber 6 is placed.
The distance from (not shown) is calculated. Thereby, the curved surface apex position P is measured.

That is, this method measures whether or not the curved surface vertex position P of the manufactured curved surface workpiece 9 is correct. However, the curved surface apex position P is formed with a curved surface (curved surface portion). Therefore, the curved surface apex position P is formed as the apex Q on the plastic adhesive 8, and this is directly measured using the scriber 6 and the scale 7.

[Problems to be solved]

 However, the above conventional technique has the following problems.

That is, as shown in FIG. 13, in forming the apex Q, it is inevitable that the scale 7 is repeatedly applied from both the A direction and the B direction, and the operation is repeated. Further, as shown in FIG. 14, the apex Q is formed by a soft object like the plastic adhesive material 8. Therefore, when the scriber 6 contacts the vertex Q, the shape of the vertex Q is easily broken.

Furthermore, since the point where the apex Q and the scriber 6 coincide with each other is visually detected, it is difficult to quickly and accurately determine the measurement point S.

The present invention has been made in view of the problems of the prior art, and an object thereof is to provide an apex measuring auxiliary tool for quickly and easily and accurately measuring the apex position of a curved surface of a curved surface workpiece.

[Means for solving problems]

A first invention of the present application is a vertex measuring auxiliary tool for measuring a vertex position (intersection point of tangent plane) of a curved surface of an object having a curved surface portion, wherein the vertex measuring auxiliary tool is one surface of the curved surface portion. A main body for abutting an end face on the main body, a rotary plate for abutting a side surface on the other surface of the curved surface portion, and a locking member for rotatably locking the rotary flat plate on the main body. The main body is a pseudo partial sphere formed by cutting a hemisphere at first and second planes that are perpendicular to the cut surface of the hemisphere and that pass through the spherical center, and cut out the vicinity of the spherical center. The rotating flat plate is a plate-shaped body obtained by cutting out the vicinity of the center of a fan-shaped plate having a radius substantially the same as the spherical diameter of the main body, and the locking member is the spherical center of the main body. And the center of rotation of the rotating flat plate so that the cutting surface of the hemisphere of the main body is brought into surface contact with the plate surface of the rotating flat plate. Flat is the spherical center (center of circle)
The apex measurement assisting tool is characterized in that it is a member that is locked so as to be freely rotatable around the.

As the locking member, for example, a sliding convex fitting portion for guiding the rotating disc is provided on the cut surface of the hemisphere, and a groove for fitting the sliding convex fitting portion is provided on the rotating disc to provide a stopper. There is a method of locking both members with (see FIGS. 1 to 3).

A second invention of the present application is a vertex measuring auxiliary tool for measuring a vertex position (intersection point of a tangent plane) of a curved surface of an object having a convex curved surface portion, wherein the vertex measuring auxiliary tool is the above curved surface. It has a hemispherical main body with which the cut surface abuts on one surface of the section, and a rotating arm with a side surface abutting on the other surface of the curved surface section. A ring for slidingly fitting the above-mentioned sliding convex ring, and an arm extending radially outward from the above-mentioned sliding convex ring. A ring-shaped groove, the ring-shaped groove extending semicircularly concentrically with the hemisphere on a plane that passes through the spherical center of the main body and is perpendicular to the cut surface of the hemisphere. In the apex measurement assisting tool, a convex ring is fitted, and the main body and the rotating arm are rotatably locked.

In the present invention, the apex measurement assisting tool is made of various metal materials or plastic materials, and particularly preferably magnetic material, for example, magnetic metal such as pure iron, silicon steel and permalloy alloy. Accordingly, when the curved work piece is a press-formed plate such as a steel plate, the apex measurement auxiliary tool is easily attached to the curved work piece.

[Action and effect]

In the apex measurement assisting tool of the first invention, the end surface D (the first plane or the second plane) of the main body is attached to one surface of the curved surface portion of the curved workpiece.
The end surfaces cut by a plane) are brought into contact with each other (see FIG. 1). As a result, the corresponding contact end surface D of the main body becomes the tangent plane (first tangent plane) of the curved surface portion.

Then, the rotary flat plate is rotated so that the side surface C of the rotary flat plate (the side surface opposite to the contact end surface D of the main body) is brought into contact with the other surface of the curved surface portion. As a result, the corresponding contact side surface C of the rotary flat plate becomes the other contact plane (second plane) of the curved surface portion.

The intersection of the first tangential plane (contact end surface) and the second tangential plane (contact side surface) is the apex of the curved surface.

On the other hand, since the rotating flat plate rotates about the spherical center of the main body, the extension of the contact side surface C of the rotating flat plate and the extension of the contact end surface D of the main body intersect at the spherical center, and the spherical center has a curved surface. It is the position of the vertex of.

The distance L ₁ between the spherical surface (surface) of the main body and the sphere is the radius R of the sphere, and the distance L ₂ between the outer peripheral surface of the circle of the rotating disk and the sphere is almost equal to the sphere diameter R (see FIG. 1). , L ₁ = R, L ₂ = R).

Therefore, if the reference planes of the two scribers shown in the conventional example (see FIG. 14) are brought into contact with the spherical surface of the main body or the outer peripheral surface of the rotating disc, and the coordinate positions of the reference planes of the two scribers are known, There is an apex to be obtained at an intersection point (an intersection point of an arc having a radius R) separated from the both points by the spherical diameter R.

That is, according to the present invention, even if the tip of the scriber is not directly aligned with the apex of the curved surface, the apex of the curved surface is obtained by simply abutting the reference surface on the spherical surface or the outer peripheral surface of the rotating disk. be able to.

Therefore, as compared with the conventional method of searching the position (point) of the apex and matching the scriber to the apex, the apex can be measured extremely quickly, easily and accurately.

On the other hand, the apex measurement auxiliary tool of the second invention has a hemispherical main body and a rotating arm (see FIG. 8). Then, the hemispherical cut surface E of the main body is brought into contact with one surface of the convex curved surface portion. As a result, the cut surface E becomes a tangential plane (first tangential plane) of the curved surface portion (see FIG. 11).

On the other hand, in the rotating arm, the sliding convex ring is fitted in the ring-shaped groove of the main body, and since the ring-shaped groove is formed concentrically with the hemisphere, the sliding convex ring is formed along the ring-shaped groove. When it is slid, the arm of the rotating arm rotates in the direction perpendicular to the cutting plane E with the spherical center of the hemisphere as the center of rotation (see FIG. 8).

Then, when the side surface F of the arm perpendicular to the rotation circular surface on which the arm rotates is brought into contact with the other surface of the curved surface portion, the contact side surface F of the arm becomes the second tangent plane of the curved surface portion. Become (No.
(See Figure 11).

The intersection point between the first tangential plane (cut surface E of the hemisphere) and the second tangential plane (contact side surface F of the arm) is the vertex P of the curved surface portion.

On the other hand, since the center of rotation of the arm is the spherical center, the vertex P of the curved surface portion coincides with the spherical center of the main body.

Therefore, if the reference planes of the two scribers are brought into contact with the spherical surface of the main body and the coordinate positions of the reference planes are known, the apex to be obtained at the intersection point (the intersection point of the circular arc of radius R) separated from both points by the spherical diameter R of the main body Exists.

That is, also in the present invention, as in the first invention, the apex P of the curved surface portion can be obtained by bringing the reference surface of the scriber into contact with the spherical surface of the main body and obtaining the coordinates of the reference surface.

That is, even if the tip of the scriber is not directly aligned with the apex of the curved surface as in the conventional case, the apex P of the curved surface can be obtained by simply contacting the reference surface with the outer peripheral surface of the spherical surface. Compared with the method described above, the vertex can be measured extremely quickly, easily and accurately.

As described above, according to the present invention, it is possible to provide an apex measurement assisting tool capable of measuring the apex position of a curved surface quickly, easily and accurately.

〔Example〕

First Example A vertex measuring auxiliary tool according to this example will be described with reference to FIGS. 1 to 7.

That is, as shown in FIG. 1, the apex measurement assisting tool 11 of this example includes a main body 21 formed of a part of a spherical body and having a sliding convex fitting portion 41 as a locking member, and a side surface of the main body 21. The rotary flat plate 31 is fitted to the sliding convex fitting portion 41 of T and is slidable.

A part of the spherical body is one eighth of the spherical body, that is, one obtained by dividing the spherical body into eight equal parts with the spherical center O as the center.

Moreover, the sliding convex fitting portion 41 is arranged along a substantially circular circumference in the vicinity of the circumferential end of the side surface T formed in the cross section passing through the spherical center of the main body 21, that is, the fan-shaped side surface T. That is, the main body 21 is formed of a 1/8 spherical body and has a sliding convex fitting portion 41.

The rotating flat plate 31 is fitted in the main body 21 and slidably arranged. That is, the rotary flat plate 31 has the sliding concave fitting portion 51 at a position corresponding to the sliding convex fitting portion 41, and the sliding concave fitting portion 51 is fitted to the sliding convex fitting portion 41. Then, they slide and rotate along the circumference edge.

Further, the sliding convex fitting portion 41 has a stopper 45 as a locking member corresponding to the shape of the sliding concave fitting portion 51. The stopper 45 is attached via a screw 451. The rotary flat plate 31 stops when the sliding concave fitting portion 51 slides and rotates for a certain length.

As shown in FIG. 3, the rotary flat plate 31 is a groove in which one of the sliding concave fitting portions 51 is open. Therefore, as shown in FIG. 2, the sliding concave fitting portion 51 is fitted in the sliding convex fitting portion 41 of the main body 21 from the side K direction, and the main body 21 and the rotary plate are fitted.
Assemble 31 and.

Since the apex measurement assisting tool 11 of this example is configured as described above, it has the following effects.

That is, as shown in FIGS. 4 to 7, the apex measurement assisting tool 11 of this example is used on the recessed surface of the steel plate 91 that has been press-curved. The stopper 45 is omitted in FIGS.

The apex measurement auxiliary tool 11 has an end surface D on the concave surface of the steel plate 91.
And the side surface C are set in close contact with the surface of the steel plate 91.

First, the side cross section of the main body 21, which is the end surface D side of the apex measurement auxiliary tool 11 on the main body 21 side, is brought into close contact with the surface of the steel plate. Then, in this state, one side surface C side, that is, the rotary flat plate 31 is slidably rotated in the arrow Z direction to bring the side surface C into close contact with the surface of the steel to complete the setting.

Next, as shown in FIG. 7, at a measurement point SX, SY using a pair of scribers 6 orthogonal to each other, measurement values X1 and Y1 for measuring the curved surface apex position P on the surface plate as described above.
To get

That is, the smooth surface 61 of the scriber 6 is brought into horizontal contact with the measuring point SY on the surface of the main body 21. Then, the measured value of the length Y1 from the measurement reference plane L is obtained.

Next, the measurement point, which is the circumferential side surface on the side where the rotating flat plate 31 has moved
At SX, obtain the measured value X1 in the same manner.

Then, the curved surface vertex position P is calculated by the following calculation formula.

That is, the lengths R2 and R3 from the ball center O to the measuring points SY and SX are both equal to the radius R1 of the sphere. Therefore, the following equation (1)
The reference values Y2 and X2 of the curved surface apex position P are obtained by (3).

R1 = R2 = R3 ... (1) Y2 = Y1-R3 ... (2) X2 = X1-R2 ... (3) Therefore, according to this example, the curved surface vertex position of the steel plate recess P
Can be measured quickly, easily and accurately.

Second Embodiment A vertex measuring auxiliary tool according to this embodiment will be described with reference to FIGS. 8 to 11.

As shown in FIG. 11, the apex measurement auxiliary tool of this example is a steel plate 92
It is for use on the convex surface of the.

That is, as shown in FIG. 8, the apex measurement assisting tool 12 of the present example is a main body 22 (FIG. 9) which is a half spherical body and has a ring-shaped groove 52 into which a rotating arm 32 is fitted. And a rotatable arm 32 (first
(Fig. 10). In FIG. 8 and FIG. 10, reference numeral 42 is a sliding convex fitting portion that fits with the ring-shaped groove 52.

Since the apex measurement assisting tool 12 of this example is configured as described above, it has the following operational effects.

That is, the apex measurement assisting tool 12 of this example is used in close contact with the convex surface of the steel plate 92 as shown in FIG.

First, the cut surface E of the main body 22 is brought into close contact with the steel plate 92. next,
The rotating arm 32 is rotated and slid in the arrow Z direction. Then, the side face F of the rotating arm 32 is brought into close contact with the steel plate 92 to complete the setting.

After setting in this way, the scriber 6 is placed on the measuring points SY and SX, and the distance from the measurement reference plane (not shown) is obtained on the surface plate (not shown) as in the first embodiment. The curved surface apex position P is measured.

That is, the curved surface apex position P on the convex surface of the steel sheet 92 is obtained according to the procedure shown in FIG. 7 in the first embodiment.

Therefore, according to this example, the curved surface apex position P on the convex surface of the steel plate 92 can be measured quickly, easily and accurately.

[Brief description of drawings]

1 to 7 show an apex measuring auxiliary tool according to the first embodiment, FIG. 1 is a perspective view thereof, FIG. 2 is a perspective view of a main body, FIG. 3 is a perspective view of a rotary plate, and FIG. FIGS. 7 to 7 are side views showing the use thereof, FIGS. 8 to 11 show a vertex measuring auxiliary tool according to the second embodiment, FIG. 8 is its perspective view, FIG. 9 is a side view of the main body, FIG. 10 is a side view of the rotary plate, FIG. 11 is a side view for explaining its use, and FIGS. 12 to 14 are side views for explaining a conventional example. 11 ... Apex measurement auxiliary tool according to the first embodiment, 12 ... Apex measurement auxiliary tool according to the second embodiment, 21,22 ... Main body, 31 ... Rotating flat plate, 32 ... Rotating arm, 41, 42 …… Sliding convex fitting part, 45 …… Stopper (locking member), 51 …… Sliding concave fitting part, 52 …… Ring-shaped groove, P …… Apex,

Claims (2)

[Scope of utility model registration request] 1. An apex measurement auxiliary tool for measuring the apex position of a curved surface of an object having a curved surface portion, the apex measurement auxiliary tool including a main body for contacting an end face with one surface of the curved surface portion. A rotary plate having a side surface abutting against the other surface of the curved surface portion, and a locking member for rotatably locking the rotary plate to the main body, wherein the main body is a hemisphere. Is a pseudo partial sphere obtained by cutting the partial sphere perpendicular to the cut surface of the first and second planes passing through the spherical center and cutting the vicinity of the spherical center, while the rotating flat plate is A fan-shaped plate having a radius almost the same as the sphere is formed by cutting out the vicinity of the center of the circle, and the locking member has a spherical center of the main body and a circular center of the rotating flat plate. The hemispherical cut surface of the main body is brought into surface contact with the plate surface of the rotary flat plate so that the rotary flat plate is centered on the spherical center so that they coincide with each other. Vertex measuring aid, characterized in that freely a member for locking as rotatable. 2. A vertex measuring auxiliary tool for measuring a vertex position of a curved surface of an object having a convex curved surface portion, wherein the vertex measuring auxiliary tool has a cut surface on one surface of the curved surface portion. It has a hemispherical main body to be brought into contact, and a rotating arm having its side surface brought into contact with the other surface of the curved surface portion, and the rotating arm has a sliding convex ring formed in an arc shape, An arm extending in a radial direction outward from the sliding convex ring, the main body having a ring-shaped groove into which the sliding convex ring is slidably fitted, and the ring-shaped groove. Has a semicircular shape extending concentrically with the hemisphere on a plane that passes through the spherical center of the body and is perpendicular to the cut surface of the hemisphere. An apex measurement assisting tool characterized in that a moving arm is rotatably locked.