JP2000337805A - Measuring apparatus for padding thickness in groove part of welded joint and its usage method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely judge a padding thickness without manufacturing a die plate by measuring the padding thickness by combining a square, an external ruler and two rulers for inclination parts. SOLUTION: Before a padding part 5 is formed, a first ruler 13 for an inclination part is brought into contact with a first inclination part 7, a second ruler 14 for an inclination part is brought into contact with a second inclination part 8, and an external ruler 12 is brought into contact so as to follow the outer face of a reducer 1 in a state that the incide contact part 16 of a square 1 is brought into contact with the inner face of the reducer 1 and that the base part of a rectangular projection part 17 is brought into contact with the inner-face-side tip 6. The position of the ruler 13 for the inclination part, that of the ruler 14 for the inclination part and that of the external ruler 12 with reference to the square 11 are fixed. A reference line is drawn on the outer face of the reducer 1. After that, this measuring apparatus 15 is removed from the reducer 1, and the padding part 5 is formed. The measuring apparatus 15 is brought into contact so as to follow the reducer 1 again, and a size up to the reference position of a graduation from the reference line or the outer face of the reducer 1 is read out and thereby, the padding thickness (a) can be measured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the thickness of a weld-joint groove portion, and a method of using the same.

[0002]

2. Description of the Related Art Generally, when end faces of base materials made of different materials are butt-butted to each other and welded to each other, a groove of a required thickness is formed on a groove portion of one base material by a molten material made of the same material as the other base material. Sheng is performed.

FIG. 4 is a side sectional view showing a reducer as an example of a base material in which a groove is welded to a groove portion of a welded joint, wherein 1 is a reducer in a main steam pipe or the like of a boiler, and 2 is a reducer 1 The large-diameter pipe 3 welded to the large-diameter end face is a small-diameter pipe welded to the small-diameter end face of the reducer 1. The small-diameter pipe 3 and the reducer 1 are made of the same material (for example, 9).
・ Cr-1 ・ Mo etc., and the large diameter pipe 2 is made of a different material
In the case where the groove 4 is formed of (for example, 2 1/4 Cr-1 Mo), a groove 4 is machined on the large-diameter end surface of the reducer 1, and the groove 4 is A cladding 5 of the same material as that of the large-diameter pipe 2 is performed, and the surface is machined so that the thickness becomes a required dimension, and the entire length of the reducer 1 is finished to the required length.

As shown in FIG. 5, the groove 4 has a first inclined portion 7 inclined at a required angle from the inner end 6 of the reducer 1 and an outer inclined side at a different inclination angle from the first inclined portion 7. And a second template 8 formed of a thin plate to determine whether or not the thickness of the overlay 5 formed on the groove 4 has a required dimension. Is to be confirmed by.

[0005] The template 9 is formed in a shape following the machined groove 4, and the end face 10 of the template 9 is aligned with a reference line drawn in advance on the outer surface of the reducer 1 by scoring. In this state, if there is no gap between the template 9 and the portion of the overlay 5, it is determined that the thickness of the overlay 5 formed on the groove 4 has the required size. The thickness of the overlay 5 formed on the groove 4 is checked at a plurality of required locations in the circumferential direction of the reducer 1.

However, the dimensions and angles of the machined groove 4 of the reducer 1 are not always constant and accurate, and there are ± tolerances. In, two types of template 9 corresponding to the case of the maximum allowable dimension and angle on the + side and the template 9 corresponding to the minimum dimension and angle of the allowable-side are prepared. Of the two types of template 9, the template 9 closer to the shape of the groove 4 before the overlay is selected each time, and the thickness of the overlay 5 is checked.

[0007]

However, the dimensions and angles of the machined groove 4 of the reducer 1 are in a state where the ± tolerance of each part is variously combined, and accordingly, the first inclined part is formed. Since the inclination angle of the second inclined portion 7 is slightly different from that of the second inclined portion 8, as described above, the thickness of the overlay 5 formed on the groove portion 4 is a required dimension by simply preparing two types of the template 9. However, it is very difficult to accurately determine whether or not the mold plate 9 is formed, and it has been almost impossible to manufacture the template 9 in accordance with the assumed combination of the ± tolerance of each part.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention provides a method of manufacturing a mold plate corresponding to an assumed combination of ± tolerances of each part without forming a template, thereby forming a thickness of a build-up portion formed on a groove of a base material. It is an object of the present invention to provide a weld joint groove thickness build-up thickness measuring device capable of accurately judging whether or not has a required dimension and a method of using the same.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a groove having a first inclined portion and a second inclined portion is formed on an end face of a base material. A weld joint groove thickness measurement device for measuring the build-up thickness, an inner surface abutment portion abutted so as to follow the inner surface of the base material, and a base end of the inner surface abutment portion. A right-angled projection extending at a right angle and disposed in the thickness direction of the base material and having a distal end protruding toward the outer surface of the base material, and having a base material thickness at a base end of the right-angled projection. A required length of the inner surface orthogonal position adjustment elongated hole extending in parallel with the height direction is formed, and a required length of the outer surface orthogonal position adjustment extending in parallel with the thickness direction of the base material is provided at a tip end of the right angle projection. A right angle ruler with a long hole drilled, and the base end of the right angle ruler is attached to the rectangular surface of the right angle overhang. A scale extending parallel to the inner surface contact portion of the right angle ruler and abutting on the outer surface of the base material so as to follow the outer surface of the base material; An outer surface ruler with a required length of outer surface parallel position adjustment extending in the thickness direction of the cladding of the base material at a required position in the intermediate portion, and an outer surface ruler at the required position in the intermediate portion. A first inclined portion position adjusting slot having a required length extending to the inner surface orthogonal position adjusting slot of the right-angled protruding portion of the right angle ruler. A first inclined ruler which is attached by the attached member so as to be adjustable in position according to the first inclined portion of the groove of the base material and is abutted so as to follow the first inclined portion, and the intermediate portion is located at a required position. A second inclined portion position adjusting slot having a required length extending in the longitudinal direction is formed, and a portion of the second inclined portion position adjusting slot is formed by an outer surface of an outer surface ruler. The position adjusting slot is attached by a fastening member so as to be adjustable in position according to the second inclined portion of the groove of the base material, and the tip is pivotally attached to the tip of the ruler for the first inclined portion. The present invention relates to a weld joint groove thickness buildup thickness measuring device, comprising: a second inclined portion ruler abutted so as to follow the inclined portion.

Further, in the present invention, the inner surface contact portion of the right angle ruler is brought into contact with the inner surface of the base material, and the base end of the right angle projection is brought into contact with the inner surface front end of the groove. In this state, the ruler for the first inclined part is brought into contact with the first inclined part of the groove,
The second inclined portion ruler is abutted so as to follow the second inclined portion of the groove portion, the outer surface rule is abutted so as to follow the outer surface of the base material, and the first inclined portion with respect to the right angle ruler is tightened by tightening each fastening member. Fix the position of the ruler for the part, the ruler for the second inclined part, and the outer surface ruler to form a measuring device that follows the groove of the base material before overlaying, and match the reference position of the scale of the outer surface ruler Then, a reference line is drawn on the outer surface of the base material, and thereafter, the measuring device is removed from the base material,
The cladding is formed on the groove portion of the base material, the measuring device is again brought into contact with the base material, and the dimension from the reference line on the outer surface of the base material to the reference position of the scale is read, thereby forming the build-up. The present invention relates to a method for using the weld joint groove thickness build-up thickness measuring device according to claim 1, wherein the thickness is measured.

According to the above means, the following effects can be obtained.

[0012] The inner surface contact portion of the right angle ruler is brought into contact with the inner surface of the base material, and the base end of the right angle projection is brought into contact with the inner surface front end of the groove. The part ruler is abutted to follow the first slope of the groove, the second slope rule is abuted to follow the second slope of the groove, and the outer surface ruler is copied to the outer surface of the base material. So that the positions of the first inclined portion ruler, the second inclined portion ruler, and the outer surface ruler with respect to the right angle ruler are fixed by tightening each fastening member, and the groove is formed on the base material before the cladding. A measuring device having a shape to follow is formed, and a reference line is drawn on the outer surface of the base material so as to match the reference position of the scale of the outer surface ruler. Thereafter, the measuring device is removed from the base material, and the groove of the base material is formed. Then, the measurement device is brought into contact with the base material again so as to follow the base material, and the dimension from the reference line on the outer surface of the base material to the reference position of the scale is read. Thus, if the overlay thickness is measured, even if the dimensions and angles of the machined groove of the base material are slightly different due to the ± tolerance of each part, the measuring device is: Since the thickness can be adjusted according to the shape of the groove, the thickness of the overlay formed on the groove becomes the required size, which is completely different from simply preparing two types of templates as in the past. It is possible to accurately determine whether or not there is.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an example of an embodiment of the present invention. In the drawings, the portions denoted by the same reference numerals as those in FIGS. 4 and 5 represent the same components. 4 and 5 is the same as the conventional one, but the feature of the illustrated example is that, instead of the template 9, as shown in FIGS. 1st slope ruler 1
The point is that a measuring device 15 that is a combination of the third and the second inclined portion ruler 14 is used.

The right angle ruler 11 has an inner surface abutting portion 16 abutted so as to follow the inner surface of the reducer 1 as a base material,
The reducer 1 extends perpendicularly from the base end of the inner surface contact portion 16.
A right-angled projecting portion 17 which is disposed in the thickness direction and whose distal end protrudes toward the outer surface side of the reducer 1, and which is parallel to the thickness direction of the reducer 1 at the base end of the right-angled projecting portion 17. And a required length of the outer surface orthogonal position adjusting slot 1 extending parallel to the thickness direction of the reducer 1 at the tip of the right angle projection 17.
9 is provided.

The outer surface ruler 12 has a right-angle ruler 1 at its base end.
1 is attached to the outer surface orthogonal position adjusting slot 19 of the right angle projection 17 by a tightening member 20 such as a bolt with a wing nut according to the thickness of the reducer 1 so as to be adjustable in position. A portion extending in parallel with the portion 16 is abutted so as to follow the outer surface of the reducer 1, and a portion for abutting on the outer surface of the reducer 1 is provided with a scale for measuring the build-up thickness a of the groove portion 4 of the reducer 1; An outer surface parallel position adjusting slot 21 having a required length extending in the direction of the build-up thickness a of the groove portion 4 of the reducer 1 is formed at a required position in the intermediate portion.

The first inclined portion ruler 13 is provided with a first inclined portion position adjusting slot 22 of a required length extending in the longitudinal direction at a required position of the intermediate portion. 22
The perforated portion is formed in accordance with the first inclined portion 7 of the groove 4 of the reducer 1 by a tightening member 23 such as a bolt with a wing nut with respect to the elongated hole 18 for adjusting the position orthogonal to the inner surface of the right angle projection 17 of the right angle ruler 11. It is configured so that it can be adjusted in position and is brought into contact with the first inclined portion 7.

The second inclined portion ruler 14 is provided with a second inclined portion position adjusting slot 24 having a required length extending in the longitudinal direction at a required position in the middle portion. 24
Of the outer surface ruler 12 to adjust the parallel position of the outer surface of the outer surface ruler 12
The reducer 1 is attached by a tightening member 25 such as a bolt with a wing nut so as to be adjustable in position according to the second inclined portion 8 of the groove 4 of the reducer 1, and a tip is attached to a tip of the ruler 13 for the first inclined portion. , And comes into contact with the second inclined portion 8.

A reference position is set on the scale provided on the outer surface ruler 12, and the reference position is required from the end face of the right angle ruler 11 on the side facing the groove 4 of the right angle projection 17. It is designed to be located at a location separated by dimension A,
The distance from the end face of the right-angled protruding portion 17 of the right-angle ruler 11 facing the groove 4 to the tip end surface of the inner surface contact portion 16 is also equal to the dimension A.

Next, the operation of the illustrated example will be described.

First, before forming the groove 5 on the large-diameter end surface of the reducer 1 as a base material in which the groove 4 is machined,
While the inner surface contact portion 16 of the right angle ruler 11 is in contact with the inner surface of the reducer 1 and the base end of the right angle protrusion 17 is in contact with the inner surface side tip 6 of the groove portion 4, The one inclined portion ruler 13 is brought into contact with the first inclined portion 7 of the groove portion 4 so as to follow the first inclined portion 7, and the second inclined portion ruler 14 is moved to the second inclined portion 8 of the groove portion 4.
The outer surface ruler 12 is brought into contact with the outer surface of the reducer 1 so as to follow the outer surface of the reducer 1, and the first inclined ruler 13 for the right angle ruler 11 is tightened by the tightening members 23, 25 and 20.
And the position of the second inclined portion ruler 14 and the outer surface ruler 12 are fixed to form a measuring device 15 having a shape following the groove 4 of the reducer 1 before overlaying, and the reference position of the scale of the outer surface ruler 12 is formed. And a reference line is drawn on the outer surface of the reducer 1.

Thereafter, the measuring device 15 is connected to the reducer 1.
, The overlay 5 is formed on the groove 4 of the reducer 1, the measuring device 15 is again brought into contact with the reducer 1 so as to follow the reducer 1, and the dimension from the reference line on the outer surface of the reducer 1 to the reference position of the scale is removed. Is read, the overlay thickness a is measured.

When the build-up thickness a is less than the required value, the build-up 5 is further performed, and when the build-up thickness a becomes more than the required value, the build-up 5 is completed. Then, after machining the surface, the measuring device 15 is brought into contact with the reducer 1 in the same manner as described above, and while checking the build-up thickness a,
Finishing is performed so that the entire length of the reducer 1 is the required length.

As a result, even if the dimensions and angles of the machined groove 4 of the reducer 1 are slightly different due to the tolerance of ± of each part, the measuring device 15 can maintain the groove 4. The thickness of the overlay 5 formed on the groove 4 becomes a required dimension, which is completely different from simply preparing two types of template plates 9 as in the related art. It is possible to accurately determine whether or not there is.

In this way, the thickness of the overlay 5 formed on the groove 4 of the reducer 1 as a base material can be reduced without manufacturing the template 9 corresponding to the assumed combination of ± tolerances of each part. It can be accurately determined whether or not the required dimensions are obtained.

The apparatus for measuring the build-up thickness of a welded joint groove portion of the present invention and the method of using the same are not limited to the above-described example, and the base material is not limited to a reducer, but may be a pipe or plate. It goes without saying that various changes can be made without departing from the spirit of the present invention, such as being applicable to the present invention.

[0027]

As described above, according to the apparatus for measuring the build-up thickness of the welded joint groove portion of the present invention and the method of using the same, according to the present invention, the template is formed in accordance with the assumed combination of the ± tolerance of each part. It is possible to obtain an excellent effect that it is possible to accurately determine whether or not the thickness of the overlay formed on the groove portion of the base material has a required dimension without manufacturing.

[Brief description of the drawings]

FIG. 1 is an enlarged side sectional view of a main part of an example of an embodiment of the present invention, and is a view corresponding to a portion V in FIG.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 1;

FIG. 4 is a side cross-sectional view showing a reducer as an example of a base material in which a bevel is formed on a groove portion of a welded joint.

FIG. 5 is an enlarged side sectional view of an essential part showing an example of a conventional apparatus for measuring the thickness of a build-up performed on a groove portion of a base material welded joint shown in FIG. FIG. 4 is a diagram corresponding to a V portion of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reducer (base material) 4 Groove part 5 Overlay 6 Inner surface front end 7 First inclined part 8 Second inclined part 11 Right angle ruler 12 Outer surface ruler 13 First inclined part ruler 14 Second inclined part ruler 15 Measuring device Reference Signs List 16 inner surface contact portion 17 right angle overhanging portion 18 inner surface orthogonal position adjustment slot 19 outer surface orthogonal position adjustment slot 20 fastening member 21 outer surface parallel position adjustment slot 22 first inclined portion position adjustment slot 23 fastening member 24 first Double slope position adjustment slot 25 Tightening member a Overlay thickness

Claims (2)

[Claims] 1. A groove having a first inclined portion and a second inclined portion is formed on an end face of a base material, and when the groove is clad,
A weld joint groove thickness measurement device for measuring the build-up thickness, comprising: an inner surface contact portion contacted so as to follow an inner surface of a base material; and a base end of the inner surface contact portion. A right angle projection extending from the base material in the thickness direction of the base material and having a distal end protruding toward the outer surface side of the base material. An inner surface orthogonal position adjustment elongated hole of a required length extending in parallel with the thickness direction is formed, and an outer surface orthogonal position of a required length extending in parallel with the thickness direction of the base material at a tip end of the right-angle overhang portion. A right angle ruler with an adjustment slot drilled, and a base end is attached to the slot for adjusting the right angle of the outer surface of the right angle overhang of the right angle ruler with a fastening member so that the position can be adjusted freely according to the thickness of the base material. , Extending parallel to the inner surface contact portion of the right angle ruler, abutting so as to follow the outer surface of the base material, and measuring the build-up thickness of the groove portion of the base material at a portion contacting the outer surface of the base material. An outer surface ruler with a required length at the intermediate portion and a slot for adjusting the outer surface parallel position of a required length extending in the thickness direction of the cladding of the base material at the required position at the intermediate portion, and A first inclined portion position adjusting slot having a required length extending in the longitudinal direction is drilled, and a perforated portion of the first inclined portion position adjusting elongated hole is formed in an inner surface orthogonal position adjusting slot of a right angle projecting portion of a right angle ruler. On the other hand, a ruler for a first inclined portion which is attached by a tightening member so as to be adjustable in position according to the first inclined portion of the groove of the base material, and which is abutted so as to follow the first inclined portion; A second inclined portion position adjusting slot having a required length extending in the longitudinal direction thereof is formed, and a portion formed by the second inclined portion position adjusting slot is tightened to the outer surface parallel position adjusting slot of the outer surface ruler. A member is attached so that the position can be adjusted according to the second inclined portion of the groove portion of the base material, and the tip is fixed for the first inclined portion. Of is pivotally secured to the distal end, the second inclined portion welded joint groove portion cladding thickness measurement apparatus being characterized in that a for the second inclined portion ruler abuts to imitate. 2. A state in which the inner surface contact portion of the right angle ruler is abutted so as to follow the inner surface of the base material, and the base end of the right angle projection is in contact with the inner surface side tip of the groove portion. The ruler for one inclined portion is abutted so as to follow the first inclined portion of the groove portion, the ruler for the second inclined portion is abutted so as to follow the second inclined portion of the groove portion, and the outer surface ruler is attached to the outer surface of the base material. The position of the ruler for the first inclined part, the ruler for the second inclined part, and the outer surface ruler with respect to the right angle ruler is fixed by tightening each tightening member, and the groove of the base material before overlaying is fixed. Form a measuring device of a shape following the part, and draw a reference line on the outer surface of the base material by matching the reference position of the scale of the outer surface ruler,
Thereafter, the measuring device is removed from the base material, and the groove of the base material is overlaid, the measuring device is again brought into contact with the base material, and the scale is drawn from the reference line on the outer surface of the base material. 2. The method according to claim 1, wherein the thickness is measured by reading a dimension up to a reference position.