JPS582757B2 - Specific welding object mounting jig for automatic welding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting jig for a specific workpiece in an automatic welding apparatus that automatically welds the workpiece by controlling the relative positions of a torch and the workpiece.

Generally, when mounting objects to be welded in an automatic welding device, the objects are mounted at fixed positions using appropriate mounting jigs to prevent errors in the dimensions of each part to be welded relative to a reference position.

However, with special objects to be welded, the mutual positional relationship between multiple welded parts is not constant, and therefore each welded part has a reference position, so each time the welded part is moved, it must be reattached to the jig. Must be.

For example, as in the radiator shown by R in Figs. 1 and 2, tube sheets C1 and C2 are pushed through each end of a large number of straight pipes b provided through a large number of fins a arranged at appropriate intervals. C1 and C2 are connected by angle members d placed at the four corners of the fin a, and each of the straight pipes b is alternately connected at both ends by U-shaped tubes e to become one. In the case where the lids f1 and f2 are placed on the outside and the lids and the tube sheets C1 and C2 are welded, the distance between the tube sheets C1 and C2 is not necessarily constant.

Therefore, for such an article, the reference planes are C1 and C.
There are 2 locations.

In view of the above-mentioned circumstances, the present invention fixes a workpiece to be welded on a movable plate that is lowered by its own weight with respect to a positioning plate in a working posture position, and moves the workpiece to be a reference position of the target welded part by moving the movable plate. Mounting of a specific workpiece in an automatic welding device, which is characterized by being able to weld a specific workpiece having two reference positions with irregular intervals without positional deviation by positioning it with respect to a positioning plate. 4, which aims to provide a jig.

To explain in detail with the embodiment shown in the figure, 1 is a planar L-shaped base;
2 is a vertical frame erected on one side of the L-shape of the base 1; 3 is an arm 4 attached to the side of the vertical frame 2 so as to be movable in the vertical direction (in the direction of arrow 2 in the drawing); A torch mount is attached to the tip of the arm 3 and is swingable around a vertical axis (in the direction of arrow V in the drawing); 5 is a torch attached to the tip of the torch mount 4; the mounting position and angle of the torch 5 are as follows: is determined as appropriate depending on the welding method, the shape of the workpiece, etc. I can't stand it.

6 is a first frame fixed to the other side of the L-shape of the base 1 at an appropriate distance from the vertical frame 2, and 7 is the first frame movable in the front-rear direction (direction of arrow X in the drawing). A moving table 8 is placed on the moving table 7 so as to be movable in the horizontal direction (in the direction of arrow Y in the drawing), and 9 is a mounting plate for a jig for mounting the workpiece. , is attached to the front part of the second frame 8 so as to be rotatable around the central axis in the left-right direction (in the directions of arrows 01 to θ2 in the drawing).

Reference numeral 10 denotes a welding object mounting jig, which includes a rectangular positioning plate 11 which is fixed to the mounting plate 9 with bolts (not shown) and has reference sides 11a and 11b that are parallel to each other formed as a contact portion serving as a positioning reference; The positioning plate 11
A rectangular movable plate 12 in which a long hole 12a with a convex cross section is cut in the central portion of the movable plate 12, which overlaps with each other and extends perpendicularly to the reference sides 11a and 11b of the positioning plate 110, and the center of the long hole 12a of the movable plate 12. a convex guide member 14 that also serves as a stopper and is fixed to the positioning plate 11 with a bolt 13 by loosely fitting into the positioning plate 11 so that the movable plate 12 can slide freely under its own weight; It consists of two positioning pins 15.15 protruding from the side ends of the body, a holding member 16 and bolts/nuts 17 for fixing the radiator R as the object to be welded to the movable plate 12, and a convex that also serves as the stopper. The shape guide member 14 is connected to the movable plate 1.
2 serves as a guide when it moves on the positioning plate 11, and also prevents it from falling off the positioning plate 11.

When installing the radiator R in which the tube plates C1 and C2 constitute a reference position before being parallel to each other as objects to be welded, first, the reference sides 11a and 1lb of the positioning plate 11 are vertical, and the positioning pins 15 and 15 are positioned downward. Rotate the mounting plate 9 as shown.

Next, the angle member d is supported on the positioning pin 15.15, and the inner surface of the tube plate C1 and the positioning plate 0 reference side 11a are supported.
The radiator R is mounted in a state where it is in contact with the presser member 16.
Tighten the bolts and nuts through.

As a result, the radiator R was attached to the mounting jig 10, but in this case, the movable plate 12
is the margin length that can be moved toward the reference side 11a side, that is, the third
, 4 is the distance l4 between the inner surface of the tube sheet C2 of the radiator and the reference side 11b of the positioning plate 11
1, distance between C2 l2 - distance between reference sides 11a and 11b l3
It must be set larger than 2 and 4).

A separately provided remote control device (not shown) has a built-in microcomputer, and this includes an arrow θ on the mounting plate 9.
90° rotation in one direction, welding operation of tube plate C1 and lid f1 (positioning in arrow X, Y, Z, F directions, welding current, etc.), 180° rotation of mounting plate 9 in arrow θ2 direction A series of operations including the welding operation of the tube plate C2 and the lid f2, and the operation of returning the mounting plate 9 to its original position by rotating it by 90° in the direction of the arrow θ1 are all programmed.

Therefore, once the start button (not shown) of the remote control device is operated, the mounting plate 9, positioning plate 11, movable plate 12, and radiator R are rotated 90 degrees in the direction of arrow θ1, and the reference side 11a and tube sheet C1 are held on top and in a horizontal position (FIG. 1).

In this state, horizontal fillet welding between the tube plate C1 and the lid f1 is performed.

Next, the mounting plate 9 and the like are rotated 180 degrees in the direction of arrow θ2.

During this rotational movement, the movable plate 12 is guided by the guide member 14 which also serves as a stopper, and slides downward due to the weight of the plate 12 and the radiator R, etc., and moves upward with the tube plate C2 in contact with the reference side 11b. and held horizontally.

In this state, horizontal fillet welding between the tube plate C2 and the lid f2 is performed.

Finally, the mounting plate 9 and the like are again rotated 900 times in the direction of arrow θ1 and returned to their original positions.

This completes one cycle of the series of welding work, and the next cycle begins by removing the welded radiator R, positioning and fixing a new radiator R to the movable plate 12 in the same manner as described above, and operating the start button. .

In addition, as the guide means for the movable plate relative to the positioning plate in the above-mentioned embodiment, it is also possible to use a dovetail groove fitting such as that used in the tool rest of a machine tool, and in this case, to prevent it from falling off, a dovetail groove fitting is used on one side. This can be achieved by engaging a fixed pin with a stopper member fixed at an appropriate interval on the other side.

Further, the abutting portion serving as a positioning reference for the positioning plate may be formed by one or more pins protruding from the plate.

As detailed above, if the mounting jig according to the present invention is used,
Even in the case of a specific workpiece that has two reference parts spaced apart and has many variations in the distance between the reference parts, the movable plate that fixes the workpiece moves when the workpiece is rotated to a weldable position,
As a result, the reference position is determined by bringing the reference position member of the welding part into contact with the reference part of the positioning plate on the jig side for each welding position, so there is no need for any reinstallation etc. It is possible to perform welding without

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall perspective view of an automatic welding device equipped with the mounting jig of the present invention, and FIG.
The figure is an enlarged detailed view of the vicinity of the end of a radiator, which is an example of an object to be welded, FIG. 3 is a front view of the mounting jig of the present invention, and FIG. Figure 5 is B- in Figure 3.
It is a sectional view taken along arrow B. In the figure, 9 is a mounting plate, 10 is a mounting jig, 11 is a positioning plate, 12 is a movable plate, 14 is a convex guide member that also serves as a stopper, 16 is a holding member, and R is a radiator.

Claims (1)

[Scope of Claims] 1. In an apparatus for automatic welding by controlling the relative positions of a torch and a workpiece, the apparatus is fixed to a mounting plate for a workpiece mounting jig that is rotatable around a horizontal axis and is spaced apart. a positioning plate having contact portions serving as positioning references formed near respective outer edges facing each other; a movable plate mounted on the positioning plate so as to be movable in a direction perpendicular to the horizontal axis and toward the contact portion; and a presser member for fixing the object to be welded to the movable plate, and one of the abutting parts is arranged so that the moving direction of the movable plate due to the rotation of the mounting plate is brought to a vertical position. When the movable plate to which the workpiece is attached moves downward due to its own weight, it can engage with one of two reference position forming parts spaced apart from each other on the workpiece, and by this engagement, the workpiece can be welded. 1. A specific welding object mounting jig for an automatic welding device, characterized in that the object is positioned with respect to the positioning plate. 2. The positioning plate has a rectangular shape with two parallel sides forming the contact portion.
A jig for mounting a specified workpiece in the automatic welding equipment described in Section 1. 3. The positioning plate has the contact portion formed by one or more pins protruding from the plate.
A jig for attaching a specific workpiece in an automatic welding apparatus according to claim 1. 4. The movable plate is provided with a stepped guide member that also serves as a stopper and is fixed to the positioning plate by forming an elongated hole with a convex cross section extending in the direction of movement of the plate, overlapping the positioning plate, and engaging with the convex elongated hole. A jig for placing a specific workpiece in an automatic welding apparatus according to claim 1, which guides the workpiece during movement and prevents it from falling off. 5. The positioning plate and the movable plate are fitted in a dovetail groove formed to extend in the moving direction of the movable plate, and the movable plate is fixed by engaging a pin fixed on one side with a stopper member fixed at an appropriate interval on the other side. A specific welding object mounting jig in an automatic welding apparatus according to claim 1, which is designed to prevent the workpiece from falling off. 6. The movable plate is positioned in a lateral direction perpendicular to the moving direction of the welded object by two pins planted at an appropriate distance in the plate moving direction on one side of the welded object mounting position. A jig for mounting a specific workpiece in an automatic welding apparatus according to claim 1.