JPH07155992A - Automatic welding equipment - Google Patents

Abstract

PURPOSE:To surely weld a piece even to a deformed work. CONSTITUTION:A work moving mechanism 1 fixes the part to be welded of a work W to the prescribed position. The work moving mechanism 1 is provided with a work table 11 which is moved in the vertical direction by a cylinder, and rollers 4, 5 to receive the work W by roller tables 2, 3, side parts pressing mechanisms 15, 16 to press the work W together with receiving plates 13, 14 from the right-to-left direction, and upper part pressing mechanisms 17, 18 to press the work W together with the work table 11 from the vertical direction are provided on the upper surface of the work table 11. When the welding is prepared, a welding robot is hardly moved, and the part to be welded of the work W is moved close to the welding robot by the work moving mechanism 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic welding apparatus for automatically welding a piece to a work for a building member such as a shaped steel.

[0002]

2. Description of the Related Art Conventionally, the tolerance of shape and size of shaped steel is JI.
For example, for the bending of lightweight H-section steel, the tolerance is specified to be 0.20% or less of the length when the height is 300 mm or less. Therefore, for example, for an H-shaped steel having a length of 5 m, bending of up to 10 mm is allowed.

However, this bending makes automatic welding extremely difficult when welding pieces to, for example, shaped steel. As shown in FIG. 6, when welding the pieces P to a plurality of predetermined positions of the fixed H-section steel W, if there is a large variation in the dimensions of the H-section steel W, according to automation, the pieces P are In many cases, the welding does not reach the predetermined position, or the welding mechanism cannot follow, resulting in poor welding. Therefore, the present situation is to select a shaped steel W with extremely little deformation or to press the piece P against the shaped steel W by manual work to perform welding by manual work.

On the other hand, even if there is deformation, efforts are being made to achieve complete automation. As shown in FIG. 7, the amount of deformation of the section steel W at the welding point with respect to the section steel W'at the reference position, that is, the horizontal direction. The bending amount a and the vertical bending amount b are measured by the measuring means. Based on this measurement data, the piece supply mechanism indicates the supply position of the piece P, and the welding mechanism moves to the welding point, Attempts have also been made to weld automatically.

[0005]

However, in the above-described conventional automatic welding apparatus, the piece supply mechanism and the welding mechanism have to be automatically controlled in accordance with the welding point, which makes the apparatus extremely complicated and expensive. There is a problem that

An object of the present invention is to solve the above-mentioned problems and to automatically and easily provide a piece for connecting members, for example, to various shaped steels for building members, even if the shaped steels are slightly deformed. And to provide an automatic welding device capable of performing accurate welding.

[0007]

An automatic welding apparatus according to the present invention for achieving the above object is an automatic welding apparatus for automatically welding a piece to a work, and welding for welding the piece to the work. Means, a work moving means for moving a welding portion of the work to a predetermined position in the vicinity of the welding means, and a piece supply means for supplying the piece to the work.

[0008]

In the automatic welding apparatus having the above structure,
The work moving means moves the welding point of the work to the vicinity of the welding means, the piece supply means supplies the piece to the welding point of the work, and the welding means welds the welding point.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 is a plan view showing the overall configuration of the embodiment, FIG. 2 is an enlarged plan view of an essential part, and FIG. 3 is an enlarged side view of the essential part. The work moving mechanism 1 moves the welding point S of the work W and fixes it at a predetermined position.
A loading-side roller table 2 and a loading-side roller table 3 for loading and unloading the work W are installed on both sides of. Two rollers 4, 5 are provided above the work moving mechanism 1.
Are installed at a predetermined interval, and a plurality of rollers 6 and 7 are installed on the carry-in side roller table 2 and the carry-out side roller table 3, respectively.

A piece P is provided on one side of the work moving mechanism 1.
A piece preparation mechanism 8 for preparing the workpiece W at a predetermined position, a piece supply mechanism 9 for selectively supplying a plurality of types of pieces P prepared by the piece preparation mechanism 8 to a welding point S of the work W, and a welding point S of the work W. A welding robot 10 for welding the pieces P supplied to the is installed. Here, the carry-in side roller table 2 has a positioning mechanism so that the welding point S of the work W can be positioned at a predetermined position of the work moving mechanism 1.

The rollers 4 and 5 of the work moving mechanism 1 are installed above the work table 11, and the work table 11 is mounted on a cylinder 12 so as to be vertically movable. On the work table 11, support plates 13 and 14 that come into contact with one side edge of the work W carried onto the rollers 4 and 5 are attached. On the opposite sides of the support plates 13 and 14 with the work W sandwiched therebetween. Is provided with side pressing mechanisms 15 and 16 for pressing the other side edges of the work W toward the receiving plates 13 and 14, respectively. Further, upper pressing mechanisms 17 and 18 for pressing the upper surface of the work W are installed on the work table 11, and the work W is fixed in the vertical and horizontal directions. Further, in the vicinity of the one side pressing mechanism 15, an electrode mechanism 19 for grounding that is brought into contact with and separated from one side edge of the work W is installed. These work table 11, cylinder 1
Guide mechanisms 20, 21 for vertically moving the work table 11 are installed on both sides of the work table 2.

The side pressing mechanisms 15 and 16 have the same structure. For example, one side pressing mechanism 15 is a cylinder 15b fixed to the work table 11 via a bracket 15a and its rod, as shown in FIG. 15c and rod 1
It is composed of a plate 15d fixed to the tip of 5c. Similarly, the upper pressing mechanisms 17 and 18 have the same structure. For example, as shown in FIG. 5, one upper pressing mechanism 17 includes a cylinder 17b fixed to the work table 11 via a bracket 17a, and a rod 17c thereof. , An arm 17d fixed at a right angle to the tip of the rod 17c. The electrode mechanism 19 includes a cylinder 19a, a rod 19b of the cylinder 19a, and an electrode 19c attached to the tip of the rod 19b.

With this structure, the piece P is attached to the work W.
When welding, the piece preparation mechanism 8 prepares the piece P in advance, the roller tables 2, 3 move the work W, and when the welding point S of the work W reaches a predetermined position, Stop the movement of W. Next, the cylinder 12 of the work moving mechanism 1 is activated, and the work table 11 is raised to a predetermined position. Subsequently, the side pressing mechanisms 15 and 16 operate to press the side edges of the work W toward the receiving plates 13 and 14, and similarly, the upper pressing mechanisms 17 and 18 operate to operate the work W.
Is pressed toward the work table 11. Further, the electrode mechanism 19 operates and the electrode 19c contacts the work W. Even if the work W is deformed by this,
The work moving mechanism 1 forcibly fixes the welding point S of the work W at a predetermined position suitable for welding.

In this state, the piece supply mechanism 9 takes out the piece P from the piece preparation mechanism 8 according to a predetermined operation and supplies it to the welding point S of the work W. Subsequently, the welding robot 10 welds the welding point S along a preset welding line. Here, the piece supply mechanism 9 retreats to the initial position during welding or after welding is completed, and the welding robot 1
0 retreats to the initial position after welding is completed. When the welding of the first welding point S is completed in this way, the electrode mechanism 19 operates to separate the electrode 19c from the work W, and the upper pressing mechanisms 17 and 18 and the side pressing mechanisms 15 and 16 also operate to work. Release W.

After that, the cylinder 12 is actuated to lower the work table 11 to the initial position, and the positioning mechanism of the loading roller table 2 is actuated to move the next welding point S of the work W to a predetermined position. The subsequent operation is similar to that described above, and the same operation is repeated one after another in accordance with the welding point S. After the predetermined welding is completed, the roller tables 2 and 3 carry out the work W.

In the embodiment described above, the side pressing mechanisms 15, 16 and the upper pressing mechanism 17, after the cylinder 12 is activated and the work table 11 is raised to a predetermined position.
18 operates to fix the work W, but before the cylinder 12 operates, the side pressing mechanisms 15 and 16 and the upper pressing mechanism 1
The work W may be fixed by the operation of the actuators 7 and 18. Similarly, when releasing the work W, the upper pressing mechanisms 17, 18 and the side pressing mechanisms 15, 16 may be detached from the work W after the work table 11 is lowered.

Although the above description has been made only for the illustrated embodiment, it goes without saying that many modifications can be made within the scope of the claims.

[0018]

As described above, since the automatic welding apparatus according to the present invention moves the welding portion of the work to the predetermined position by the work moving means, the piece supplying means and the welding means repeat the preset simple operation. Even if the work is deformed, the piece can be attached accurately, and the piece can be welded easily and satisfactorily. Therefore, the device for measuring the deformation of the work and the time for measuring are not required, and the piece supply means and the welding means can be inexpensive.

[Brief description of drawings]

FIG. 1 is a plan view of the overall configuration.

FIG. 2 is an enlarged plan view of a main part.

FIG. 3 is an enlarged side view of a main part.

FIG. 4 is a front view of a side pressing mechanism.

FIG. 5 is a front view of an upper pressing mechanism.

FIG. 6 is a perspective view of a piece welded to a shaped steel.

FIG. 7 is an explanatory view of bending of a shaped steel.

[Explanation of symbols]

 1 Work moving mechanism 2, 3 Roller table 4, 5, 6, 7 Roller 8 Piece preparation mechanism 9 Piece feeding mechanism 10 Welding robot 11 Work table 12 Cylinder 13, 14 Support plate 15, 16 Side pressing mechanism 17, 18 Upper pressing Mechanism 19 Electrode mechanism

Front page continued (72) Inventor Aiichiro Oyama 2791-4 Okabe-cho, Oza-gun, Saitama Prefecture (72) Inventor Makoto Sekine 4224-2 Shiro, Ageo City, Saitama Prefecture (72) Inventor Hiroshi Nagakoshi Toyama City, Toyama Prefecture City 32-6 (72) Inventor Akira Kunisaki 535-13 Shakado, Uozu City, Toyama Prefecture

Claims (1)

[Claims] 1. An automatic welding device for automatically welding a piece to a work, wherein a welding means for welding the piece to the work and a welding point of the work are moved to a predetermined position near the welding means. An automatic welding apparatus comprising a work moving means and a piece supply means for supplying the piece to the work.