JPH0675794B2 - T-type fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION “Industrial field of application” The present invention relates to a case where one end of a bone member is brought into contact with one surface of a skin plate at a substantially right angle, and both ends of the bone member are filleted to the skin plate. The present invention relates to a T-shaped joint formed by welding.

“Prior Art” FIG. 5 shows a conventional example of the above-mentioned T-type joint. In this figure, reference numeral 1 is a bone member, 2 is a skin plate, and 3 is a welded weld metal (bead) formed in the shape of an isosceles right triangle. One end of the skeleton member 1 is formed to have a uniform plate thickness, and is brought into contact with one surface of the skin plate 2 at a substantially right angle as it is, and both end portions thereof are fillet welded.

"Problems to be Solved by the Invention" By the way, in the T-shaped joint as shown in FIG. 5, the bone member 1 and the skin 2 do not need to be machined, and the work is easy in that respect. . However, the area occupied by the weld metal 3 in the joint portion (welding cross-sectional area) becomes relatively large, which requires a large amount of the weld material (welding rod, welding wire, etc.) to be used, and the welding material cost increases. However, there is a problem that the welding work time becomes long.

Further, undercut is likely to occur at the toe end 4 of the welded metal 3, and when the undercut occurs, stress concentration occurs and the joint strength decreases, so it was necessary to manage the work more carefully.

The present invention has been made in view of the above circumstances, and is formed by fillet welding, but the area occupied by the weld metal (welding cross-sectional area) in the joint portion is kept small, and the welding material (welding rod or welding wire) used. It is an object of the present invention to provide a T-type joint that can reduce the amount of (1), etc., shorten the welding work time, and reduce the formation of stress concentration points such as undercuts.

"Means for Solving Problems" A T-shaped joint according to the present invention is configured such that one end of a bone member is brought into contact with one surface of a skin plate at a substantially right angle so that both end portions of the bone member are connected to the skin plate. A T-joint formed by meat welding, wherein soft toe portions to be welded portions to the skin plate are formed in advance on both sides of one end of the skeleton member, and each of these soft toe portions is formed. , A first inclined surface inclined so that the plate thickness of the bone member gradually increases toward one end, and an inclination so that the plate thickness of the bone member gradually decreases from the tip of the first inclined surface toward one end. And a second inclined surface that forms a groove with the skin plate, and has a substantially triangular cross-sectional shape, and connects the tips of the second inclined surfaces of the soft toe portions to each other. The width dimension of the one end surface of the member is set to be smaller than the plate thickness dimension between both side surfaces of the bone member.

[Operation] In the T-type joint according to the present invention, the welding condition is similar to that of groove welding due to the soft toe portion, and a bone member having a uniform plate thickness up to the end is directly welded to the skin plate with fillet welding. In comparison with the conventional case, the area occupied by the weld metal in the joint portion (welding cross-sectional area) can be made smaller by the amount of the soft toe portion, and therefore the welding material (welding rod, or It is possible to reduce the amount of welding wire etc.) and shorten the welding work time.

Moreover, if R is appropriately added to the mutual connecting portion between the first inclined surface of the soft toe portion and the side surface of the skeleton member so as to make smooth connection, undercut occurs as compared with the conventional case. One feared location is reduced, and the formation of stress-concentrated locations such as undercuts can be reduced accordingly, and the joint strength can be improved.

[Embodiment] An embodiment of the present invention will be described below with reference to Figs.

In the T-shaped joint of this embodiment, as shown in FIG. 1, one end of the bone member 6 is brought into contact with one surface of the flat skin plate 2 at a substantially right angle, and both end portions of the bone member 6 are attached. The point that the fillet is welded to the skin 2 is common to the conventional one. However, in order to solve the conventional problems, the end portion shape of the bone member 6 has been devised.

That is, in this embodiment, soft toe portions 7 to be welded portions to the skin 2 are formed in advance on both sides of one end of the bone member 6.

Then, each of these soft toe portions 7 has a first inclined surface 7a inclined so that the plate thickness of the bone member 6 gradually increases toward one end, and one end from the tip of this first inclined surface 7a toward one end. And a second inclined surface 7b that is inclined so that the plate thickness of the bone member 6 gradually decreases and forms a groove between the skin member 2 and
The cross-sectional shape is a substantially triangular shape. An appropriate radius R is attached to a portion (a) where the first inclined surface 7a is connected to the side surface 6a of the bone member 6 to prevent stress concentration from occurring. Further, the angle θ of the second inclined surface 7b with respect to the skin plate 2 is 0 ° <θ
<90 °.

And further, the second inclined surface 7b of each soft toe portion 7
The tip end of the bone member 6 is placed inside the side surface 6a of the bone member 6 by the dimension T, and as a result, the one end surface 6b of the bone member 6 connecting the ends of the second inclined surfaces 7b to each other is The dimension is set smaller than the dimension between both side surfaces 6a of the bone member.

The bone member 6 having the structure as described above has the one end face 6b of the skin plate 2
2 and the fillet welded metal (bead) 8 by fillet welding between the soft toe portion 7 and the skin 2 as shown in FIG.
However, the welding condition is similar to that of groove welding due to the second inclined surface 7b. Therefore, as compared with the conventional case in which the bone member 1 having a uniform plate thickness to the end is fillet welded to the skin plate 2 as it is, the area occupied by the weld metal in the joint portion (welding cut) Area) can be reduced, and therefore, the amount of the molten material (welding rod, welding wire, etc.) used can be reduced correspondingly, and the welding work time can be shortened.

FIG. 3 shows the conventional case shown in FIG. 5 and the case according to the present embodiment in the same drawing to facilitate the comparison of the two, and the amount of deposited metal should be about 1/2. I understand.

Moreover, if R is appropriately added to the mutual connecting portion between the first inclined surface 7a of the soft toe portion 7 and the side surface 6a of the skeleton member 6 as in the case of the conventional case, the case of the conventional case can be obtained. By comparison, one place where there is a risk of undercut is reduced, and the formation of stress-concentrated places such as undercut can be reduced by that amount, and the joint strength can be improved.

Although the one end surface 6b of the bone member 6 is a simple flat surface in the above-described embodiment, it is also possible to form the recess 9 in the center of the one end surface 6b as shown in FIG. By forming the recess 9 in this way, a space is formed when the one end surface 6b is brought into contact with the skin 2, and it is possible to prevent a blow hole from being formed during welding.

Further, by making the second inclined surface 7b a curved surface, the penetration of welding can be facilitated.

"Effects of the Invention" As is apparent from the above description, in the T-type joint according to the present invention, one end of the bone member is brought into contact with one surface of the skin plate at a substantially right angle so that both end portions of the bone member are connected to each other. The fillet is welded to the skin plate, but the soft toe portions to be welded portions to the skin plate are formed in advance on both sides of one end of the bone member, and these soft toe portions are formed. , A first inclined surface inclined so that the plate thickness of the bone member gradually increases toward one end, and
And a second inclined surface that is inclined so that the plate thickness of the bone member gradually decreases from the tip of the inclined surface toward one end and forms a groove with the skin plate. The width dimension of the one end face of the bone member which has a shape and connects the tips of the second inclined surfaces of each soft toe portion to each other is set to be smaller than the plate thickness dimension between both side faces of the bone member, The situation is similar to groove welding due to the soft toe part, and the soft toe part is compared to the conventional case where fillet welding is performed on the skin plate as it is with a bone member having a uniform plate thickness up to the end. The area occupied by the weld metal (welding cross-sectional area) in the joint can be reduced by that amount, and therefore the amount of weld material (welding rod, welding wire, etc.) used can be reduced by that amount, and the welding work time can be reduced. Can be shortened.

Moreover, if R is appropriately added to the mutual connecting portion between the first inclined surface of the soft toe portion and the side surface of the skeleton member so as to make smooth connection, undercut occurs as compared with the conventional case. One feared location is reduced, and the formation of stress-concentrated locations such as undercuts can be reduced accordingly, and the joint strength can be improved.

[Brief description of drawings]

1 to 3 respectively illustrate one embodiment of the present invention. FIG. 1 is an explanatory view of an end shape of a bone member, FIG. 2 is a structural view after welding, and FIG. FIG. 4 is an explanatory view of the operation of one embodiment, FIG. 4 is an illustration of another embodiment of the present invention, and FIG.
It is explanatory drawing of a type joint. 2 ... Leather plate, 6 ... Bone member, 6a ... Side surface, 6b ... One end surface, 7 ... Soft toe part, 7a ... First inclined surface, 7b ...
… Second inclined surface, 8 …… Welding metal (bead)

Claims (1)

[Claims] 1. A T-shaped joint comprising one end of a bone member abutting substantially perpendicularly to one surface of a skin plate, and both end portions of the bone member being fillet-welded to the skin plate, wherein said bone A soft toe portion, which is a welded portion to the skin plate, is formed in advance on both sides of one end of the member, and the thickness of each bone member gradually increases toward one end. And a second slope forming a groove between the first slope and the slope so that the plate thickness of the bone member gradually decreases from the tip of the first slope toward one end. And the width dimension of one end face of the bone member connecting the tips of the second sloped faces of the soft toe portions to each other is between the both side faces of the bone member. A T-shaped joint characterized by being set smaller than the plate thickness dimension.