JPH0436601A - V-shape groove measuring method - Google Patents

Abstract

PURPOSE:To measure the depth, width, and area of a V-shape groove by using plural spheres and calculating them from a 1st and a 2nd distance, the quantity of variation in inclination, the 1st radius of the 1st sphere, and the 2nd radius of the 2nd sphere. CONSTITUTION:The fixed distance h1 between the reverse surface 7c of a measurement table 7 on the side of a leg part 7a and the upper plane 1a is set fixedly and a 1st sensor 4 finds the 1st distance h4 between the reverse surface 7c and the center of the 1st sphere 8. Further, a 2nd sensor 5 finds the 2nd distance h3 between the reverse surface 7c and the center of the 2nd sphere 9 and the inclination variation quantity h2, the 1st distance h4, and the 2nd distance h3 are used to find the 3rd distance d1 between the upper plane 1a and the center of the 2nd sphere 9 and the 4th distance d2 between the upper plane 1a and the center of the 2nd sphere 8. The 1st radius Ra of the 1st sphere 8 and the radius Rb of the 2nd sphere 9 are set respectively. Further, the data of the inclination variation quantity h2, the 1st distance h2, and the 2nd distance h4 obtained by the sensors 4 - 6 are inputted to a computing element 10 to calculate and output the depth D, width W, and area S of the V-shape groove 1.

Description

[Detailed Description of the Invention] a. Industrial Application Field The present invention relates to a method for measuring the depth of a groove, and in particular,
We develop new improvements for measuring width and area using multiple spheres.

b. Conventional technology This type of V-immersion measurement method that has been used in the past is as follows:
Generally, measurements were taken manually by an operator using a scale.

C8 Problems to be Solved by the Invention Since the conventional YV groove measurement method was configured as described above, the following problems existed.

In other words, in general, when two members are brought into contact and a groove or groove formed between the two members is connected by welding, it is necessary to know the depth, width, and area of this V edge. However, conventionally, measurements were performed manually, which resulted in large errors and problems such as poor welding.

The present invention has been made to solve the above-mentioned problems, and in particular, (1) provides a V-groove measurement method that uses a plurality of balls to measure the depth, width, and area within the groove; The purpose is to

d,lII! Means for Solving the Problems The V-groove measuring method according to the present invention is a V-groove measuring method that measures the width, depth, and area within the V-groove.
a first step of guiding a first ball to the lower part of the cell and measuring a first distance (h3) from the measuring table to the center of the first ball;
A second ball that guides a second ball with a larger diameter than the first ball above the first ball in the groove, and measures a second distance (h3) from the measuring table to the center of the second ball. a third step of measuring the amount of change in inclination (h2) between the upper plane of the V bank and the measuring stand; and a third step of measuring the first distance (h4) and the second distance (h3).
), the amount of change in inclination (h2>), the depth (D), width (ken), and area of the V arm based on the first radius (Ra) of the first sphere and the second radius (Rb) of the second sphere. This method consists of a fourth step of calculating (S).

01. Effect In the method for measuring the V angle according to the present invention, the fixed distance from the measurement platform to the plane of the V channel is hl, and the amount of change in force inclination from the measurement platform to the plane of the V channel is defined as 7. The second distance from the measuring table to the center of the second sphere with a large diameter is 1, the first distance from the measuring table to the center of the first sphere with a small diameter is , and the radius of the first sphere is Ra, Second
Under the condition that the radius of the sphere is set as Rb, h, + t■ Groove depth D =' 3 (') ) +s In
αh-Ra However, Sinα1 [: Shoulder L''■ Riyori 21) = h) (2) + Rb-Ra Width of V groove W = D lanαX 2 D = Depth ■ Area of groove S = WD-W Depth, width, and area can be determined by

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

Figures 1 and 2 are for illustrating the v/II measuring method according to the present invention. Figure 1 is a configuration diagram showing the measurement state, and Figure 2 is a sectional view showing the state in which the V arm is welded. be.

What is indicated by the reference numeral 1 in the figure is a groove formed between the first member 2 and the second member 3, and an upper plane 1a is formed at the upper part of this V-side 1.

On the upper plane la, a first sensor 4 and a second sensor 5 are arranged.
and a measuring table 7 having a third sensor 6,
A plurality of legs 7a and 7b provided at the bottom of this measuring table 7
The lower surface of is in contact with the upper plane 1a.

Each of the sensors 4 to 6 may be 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 that is inserted and guided into the lower part of the V-shape 1, and the detection rod 5a of the second sensor 5 The lower end of is located above the first ball 8 in the V-groove 1 and is connected to the center of a second ball 9 having a larger diameter than the first ball 8.

The detection rod 6a of the third sensor 6 is connected to one of the leg portions 7b.
It is configured to measure the amount of change in inclination 1]2 between the lower surface 7C of the measuring table 7 and the upper plane 1a by detecting the movement of the leg portion 7b which is provided on the measuring table 7 and is movable up and down. .

A fixed distance between the lower surface 7C and the upper plane 18 on the leg 7a side of the measuring table 7 is fixedly set, and the distance between the lower surface 7C and the center of the first sphere 8 is determined by the first sensor 4. The first distance ri, is calculated.

A second distance between the lower surface 7C and the center of the second sphere 9 is determined by the second sensor 5, and by using the tilt change amount h2, the first distance [1, and the second distance], A third distance d between the upper plane 1a and the center of the second sphere 9 and a fourth distance d2 between the upper plane 1a and the center of the second sphere 8 can be determined.

Further, a first radius Ra of the first sphere 8 and a radius Rb of the second sphere 9 are each set.

Furthermore, the data on the amount of change in inclination h2, the first distance, and the second distance [1, 4] obtained from each of the sensors 4, 5, and 6 are input to a computing unit 10 consisting of a CPU, etc.; 10, the depth D, width W, and area S of the V-shape 1 are output after calculation.

Next, a case will be described in which the depth D, width W, and area S are calculated by the arithmetic unit 10 in the above configuration.

Depth D=dl+d2 Width W=D tanαX 2 Area 5=3DW Therefore, by using a pair of balls 8.9 and each sensor 4, 5, and 6, automatically and area S can be automatically obtained.

g1 Effects of the Invention Since the V-groove measurement method according to the invention is configured as described above, the following effects can be obtained.

In other words, by using a pair of balls, three sensors, and a calculator, it is possible to accurately and quickly obtain the depth, width, and area of the groove.For example, when welding a pair of members, it is possible to Accurate and reliable welding can be performed.

[Brief explanation of the drawing]

Figures 1 and 2 are for showing the V-groove measuring method according to the present invention. Figure 1 is a configuration diagram showing the measurement state, and Figure 2 is a sectional view showing the V-groove in a welded state. . 1 is the V lecture, 1a is the upper plane, 7 is the measuring table, 8 is the first sphere,
9 is the second ball, h2 is the amount of change in slope, h is the first distance, h3
is the second distance. Figure 1 Patent Applicant Tamagawa Seiki Co., Ltd. Agent ti Michi Teru Figure 2

Claims (1)

[Claims] A V-groove measuring method for measuring the width, depth, and area within the V-groove (1), comprising: guiding a first ball (8) to the lower part of the V-groove (1); A first distance (h_
4), and guiding a second ball (9) having a larger diameter than the first ball (8) above the first ball (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); (7)
a third step of measuring the amount of change in slope (h_2) between the first distance (h_4), the second distance (h_3), the amount of change in slope (h_2), the first radius (Ra) of the first sphere, and the second distance (h_3); 2 balls (9
), a fourth step of calculating the depth (D), width (W), and area (S) of the V-groove (1) based on the second radius (Rb) of the V-groove (1). Measuring method.