JPH09234567A - Weld structural body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a weight of a structural body having strong rigidity and high precision used for building material, construction, vehicle, ship and other structure. SOLUTION: In a member consisting of plural deck plates or angle steels crossing/arraying in at least two stage stacked and steel plates on the top and bottom, each point, at which the angle steels 1, 2 crossed/arrayed in stages, is spot welded, further, the steel plates 3, 4 arranged on the top/bottom of stage stacked angle steels are joined by resistance welding. By this method, based on a honeycomb structure known as a high rigidity light weight structural body made of thin thickness members, by use of a thin sheet member for structural body constituting elements and joining of members with resistance welding suitable for welding of thin sheet, the light weight structural body to realize strong rigidity and high precision is made possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light structure which realizes strong rigidity and high accuracy.

[0002]

2. Description of the Related Art A processing table used in an NC processing machine,
In order to maintain machining accuracy, pallet surface plates, etc. are required to have extremely strong rigidity and always maintain high accuracy. The conventional basic technique for that purpose has dealt with, for example, increasing the thickness of the table regardless of the material. In other words, within the limits of the table dimensions, we have sought rigidity and accuracy by maximizing the mass.

However, this result has a drawback that the weight is inevitably large.

Further, in recent computer rooms and offices using OA equipment, in order to make the wiring of the wire cables connected to computers and the like invisible from the outside, the thickness of the underfloor or ceiling is increased and piping is inserted through the thickness. Cable wiring is applied.

However, increasing the thickness of the underfloor structure or the ceiling structure imposes restrictions on the weight reduction of the floor material and ceiling member used in the building structure, and enables structural design and cable wiring to obtain a strong rigidity. It is practically difficult to match such a structure.

[0006]

The problem to be solved by the present invention is to reduce the weight of a structure having strong rigidity and high accuracy used for construction, civil engineering, vehicles, ships, and other structures. .

[0007]

In view of the above, the technical means taken by the present invention are as follows. At least two deck plates are crossed and superposed on each other, or a plurality of cross-aligned chevron steels and steel plates are arranged above and below the chevron steels. In the above member structure, the intersecting points of the deck plate or the angle steel are respectively welded, and the stacked deck plates or angle steel and the steel plates arranged above and below are joined by welding. To do.

According to the present invention, the use of a thin plate member as a structural element and the welding of a thin plate material are carried out by a concept similar to a so-called honeycomb structure known as a light structure having high rigidity made of a thin plate member. By joining the members by welding, which is suitable for, it has become possible to realize a lightweight structure that achieves strong rigidity and high accuracy.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is one embodiment of the member arrangement of the light structure of the present invention. In this embodiment, the angle steel 1 and the angle steel 2 are equilateral angle steels as an example, and a plurality of angle steels are aligned and arranged to intersect each other. Reference numerals 3 and 4 denote steel plates arranged above and below the steel plates.

FIG. 2 shows the resistance welds 5 at the intersections of the angle steels which are arranged in a double stack and the resistance welds 6 between the angle steels and the steel plates which are arranged one above the other. Projection welding is used for welding of angle steel members, and a type of projection welding is also used for welding between angle steel and steel plates. As another embodiment of the figure, an arc welding structure may be partially used.

In manufacturing the light structure of the present invention, a welding test was conducted based on the following experimental values. ○ Welding condition for angle steel and steel plate per point Steel plate: 3.2mm Angle steel: 3 × 30 × 30 (mm) Welding current: 8,000A Pressurization force: 240Kgf Energizing time: 20 cycles ○ Welding condition for angle steel is per point Welding current: 3,000A Pressurizing force: 100kgf Energizing time: 40 cycles

According to the results of the above welding conditions, the strength of the welded portion is estimated from the welded area as a result of the fracture test, and the welded portion 5 has a strength of 400 kgf or more and the welded portion 6 has a strength of 2000 kgf or more. it can.

In addition, in this embodiment, the angle steels 1 aligned are arranged.
And the angle steels 2 are arranged to intersect at right angles, but this may intersect at any angle, in which case the area where the angle steels intersect will be larger than in the case of being orthogonal, so the welding area Is increased, which is advantageous in strength.

FIGS. 3 and 4 show an embodiment showing another arrangement posture of the angle steel in the two-stage cross arrangement.

FIG. 5 shows a modified example of a welded structure in which angle steel is crossed in three layers between the steel plates 3 and 4.

[0016]

As described above, the welded structure of the present invention uses, as its constituent elements, an inexpensive angle steel easily available as a thin plate member or a steel strip such as JIS G 3352 "deck plate". ， By applying welding that is suitable for welding thin plate materials, construction, civil engineering, vehicles,
It has become possible to realize a so-called honeycomb-like light structure that achieves high rigidity and high precision used for other structures. Especially as a building material, wire cables for computers, office automation equipment, etc. can be easily stored and wired in the internal space of the structure, and it is ideal as a light structure for building floor and ceiling materials that does not impair the interior appearance. is there.

The embodiment proves the possibility of this light structure, and the member dimensions shown in the embodiment are not restricted at all. Although resistance welding is a method suitable for thin plate materials, since the welding assembly method of the present invention skillfully applies welding, it can be considered that the plate thickness of the member is not limited as long as the capacity of the welding machine is available. Therefore, by increasing the thickness of the angle steel or the upper and lower steel plates, or by forming a welded assembly structure in which the angle steel is crossed and stacked in multiple stages, a structure having greater rigidity than that of the embodiment is possible.

Further, although the angle steel was used as the light structural member, instead of aligning the angle steel, a corrugated plate formed by continuously forming a steel plate into a mountain shape or a shape such as JIS G 3352 "deck plate". When a material or the like is used, the present invention can be applied only by providing projections necessary for projection welding even if the crossed surface of the plate is flat.

Further, according to the welding and assembling method of the present invention, in the light structure having the structure as in the embodiment, a smaller and lighter structure can be easily and economically assembled by using resistance welding.

[Brief description of drawings]

FIG. 1 is an example of member arrangement of a light structure of the present invention.

FIG. 2 is an example showing resistance welding points of the light structure of the present invention.

FIG. 3 is an embodiment showing another arrangement posture of the angle steel of the light structure of the present invention.

FIG. 4 is an embodiment showing another example of arrangement when the angle steel of the light structure of the present invention is changed in the direction and crossed.

FIG. 5 is an embodiment showing another example of arrangement when the angle steel of the light structure of the present invention is crossed in three steps.

[Explanation of symbols]

 1 ... Angle steel 2 ... Angle steel 3 ... Steel plate 4 ... Steel plate 5 ... Resistance welding part 6 ... Resistance welding part

Claims (1)

[Claims] 1. In a member structure in which at least two deck plates are crossed and overlapped to overlap each other, or a plurality of cross-aligned angle steels and steel plates are arranged above and below the angle plate steels, each of the deck plates or angle steels intersects each other. A structure characterized in that points are welded to each other, and the stacked deck plates or chevron steel and steel plates arranged above and below are joined by welding.