JP2761502B2 - V groove measurement method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring a V-groove, and in particular, a novel improvement for measuring the depth, width, and area in a V-groove using a plurality of spheres. About.

b. Conventional technology Conventionally, as this kind of V-groove measuring method, a measurer generally measures manually by using a scale.

c. Problems to be Solved by the Invention Since the conventional V-groove measurement method is configured as described above, the following problems exist.

That is, generally, when two members are brought into contact with each other and a V-groove formed between the two members, that is, a groove is connected by welding, the depth, width, and area of the V-groove are grasped. It is necessary, but since it was measured manually,
Errors have increased, and problems such as failure to perform welding have occurred.

The present invention has been made in order to solve the above-described problems, and in particular, provides a V-groove measuring method in which the depth, width, and area in a V-groove are measured using a plurality of spheres. The purpose is to:

d. Means for Solving the Problems A V-groove measuring method according to the present invention is a V-groove measuring method for measuring a width, a depth and an area in a V-groove, wherein a first ball is provided below the V-groove. Guiding and measuring a first distance (h ₄ ) from the measuring table to the center of the first sphere;
A second sphere having a larger diameter than the first sphere is guided above the first sphere in the groove, and a second distance (h ₃ ) from the measuring table to the center of the second sphere is measured. A second step, a third step of measuring an inclination change amount (h ₂ ) between the upper plane of the V-groove and the measuring table, and the first distance (h ₄ ), the second distance (h ₃ ), and the inclination Based on the amount of change (h ₂ ), the first radius (Ra) of the first sphere, and the second radius (Rb) of the second sphere, the depth (D), width (W), and area (S ) Is calculated in the fourth step.

e. Operation In the V-groove measuring method according to the present invention, the V
The fixed distance to the plane of the groove is h ₁ , the amount of change in inclination from the measuring table to the plane of the V-groove is h ₂ , the second distance from the measuring table to the center of the large-diameter second sphere is h ₃ , a first distance to the center of the first ball of a small diameter with a h _4, the radius of the first ball Ra, under the condition that the radius of the second ball set and Rb, , The depth, width, and area can be determined.

f. Embodiment Hereinafter, a preferred embodiment of the V-groove measuring method according to the present invention will be described in detail with reference to the drawings.

FIGS. 1 and 2 show a V-groove measuring method according to the present invention. FIG.
The figure is a sectional view showing a state where the V-groove is welded.

In the figure, reference numeral 1 denotes a V groove formed between the first member 2 and the second member 3, and an upper flat surface 1 a is formed above the V groove 1.

A first sensor 4 and a second sensor 5 are provided on the upper flat surface 1a.
And a measuring table 7 having a third sensor 6 is mounted thereon.
The lower surfaces of the legs 7a and 7b provided at the lower portion of the measuring table 7 are in contact with the upper flat surface 1a.

Each of the sensors 4 to 6 can be configured in either an analog system such as a linear potentiometer or a digital system such as a linear scale.

The lower end of the detection rod 4a of the first sensor 4 is connected to the center of a small-diameter first ball 8 which is inserted and guided in the lower part of the V-groove 1, and is connected to the detection rod 5a of the second sensor 5. The lower end of
It is located above the first sphere 8 in the V-groove 1 and is connected to the center of a second sphere 9 having a larger diameter than the first sphere 8.

The detection rod 6a of the third sensor 6 is provided on one of the legs 7b, and detects the movement of the leg 7b, which is movable up and down, to thereby detect the lower surface 7c of the measuring table 7 and the upper surface 7c.
It is configured to measure a change in slope h ₂ between 1a.

The fixed distance h ₁ between the lower surface 7 c and the upper flat surface 1 a on the leg 7 a side of the measuring table 7 is fixedly set, and the first sensor 4 sets the distance between the center of the lower surface 7 c and the center of the first sphere 8. the first distance h ₄ of is obtained.

The lower surface 7c and the second distance h ₃ between the center of the second ball 9 sought by using the change in slope h _2, the first distance h _3, and the second distance h ₄ by the second sensor 5, The upper plane
1a a third distance d ₁ and the upper plane 1a between the centers of the second ball 9
And a fourth distance d ₂ between the center of the second sphere 8 and the second sphere 8.

The first radius Ra of the first sphere 8 and the radius of the second sphere 9
Rb is set respectively.

Further, each data of the inclination change amount h ₂ , the first distance h _3, and the second distance h ₄ obtained from each of the sensors 4, 5, and 6 is stored in the CPU.
Are input to a computing unit 10 composed of
The configuration is such that the depth D, width W and area S of the V-groove 1 are output after the calculation.

Next, a case where the above-described depth D, width W, and area S are calculated by the calculator 10 in the above-described configuration will be described.

Therefore, the depth D, the width W, and the area S in the V-groove 1 can be automatically obtained by using the pair of spheres 8, 9 and the sensors 4, 5, and 6.

g. Effects of the Invention Since the V-groove measuring method according to the present invention is configured as described above, the following effects can be obtained.

That is, the depth, width, and area of the V-groove can be accurately and quickly obtained by using a pair of spheres, three sensors, and an arithmetic unit. Accurate and reliable welding can be performed.

[Brief description of the drawings]

1 and 2 show a method for measuring a V-groove according to the present invention. FIG. 1 is a configuration diagram showing a measurement state, and FIG. 2 is a sectional view showing a state where a V-groove is welded. . 1 is a V groove, 1a is an upper plane, 7 is a measuring table, 8 is a first sphere, 9
The second ball, h ₂ is change in slope, h ₄ is the first distance, h ₃ is the second distance.

Claims (1)

(57) [Claims] 1. A V-groove measuring method for measuring a width, a depth and an area in a V-groove (1), wherein a first ball (8) is guided to a lower portion of the V-groove (1) for measurement. A first distance (h ₄ ) from the platform (7) to the center of the first ball (8)
A first step of measuring a second sphere (9) having a larger diameter than the first sphere (8) above the first sphere (8) in the V-groove (1); A second step of measuring a second distance (h ₃ ) from the measuring table (7) to the center of the second sphere (9); an upper flat surface (1a) of the V-groove (1) and the measuring table ( 7) measuring a slope change amount (h ₂ ) between the first distance (h ₄ ), a second distance (h ₃ ), a slope change amount (h ₂ ), and a first ball. Fourth step of calculating the depth (D), width (W) and area (S) of the V-groove (1) based on the radius (Ra) and the second radius (Rb) of the second sphere (9). A V-groove measuring method characterized by comprising: