JPH025512B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rotary torch automatic welding device.

Conventionally, various automatic torch welding devices have been proposed, but they require teaching work to match the movement of the welding torch in advance to the shape and size of the object to be welded. There is a complication in having to carry out the procedure every time there is a difference or every time the mounting position on the work table is different.

The present invention aims to solve the above-mentioned problems, that is, regardless of the shape and size of the object to be welded, and regardless of the position where it is placed on the base plate, it can be completely welded. The aim is to commercially offer equipment that enables automatic welding.

Hereinafter, an example of implementing the present invention will be described based on the accompanying drawings.

Fig. 1 is a front view, Fig. 2 is a side view, Fig. 3 is a partially broken enlarged detailed view of the drive roller portion, Fig. 4 is a cross-sectional view taken along line X-X in Fig. 3, and Fig. 5 is a partial plan view of FIG. 1;

In each drawing, reference numeral 1 denotes a base plate, 2 a main shaft erected on the base plate 1, and a work table 3 is attached in a horizontal state to the upper end of the base plate 1 at a constant height.
4 is a cylindrical body rotatably arranged around the outer periphery of the main shaft 2 via a ball bearing, etc., and the upper half includes a storage case 5 for the torch tube and torch wire, and a storage case 5 as described below. A pair of running rails 6, 6' for a torch support means are arranged in parallel at a constant distance with a bracket 7 interposed therebetween and have a constant length in the horizontal direction.

The torch support means 8 is configured to hold the torch 9 under a certain condition with respect to the welding point k of the object to be welded 10, which is placed on the table 3. an engaging slider 11;
11' on the lower surface so as to be able to run horizontally, and a support shaft 1 near the front end of the sliding plate 12.
3 (see Fig. 3), a vertical rod 15 having a rack tooth m formed on one side is erected from the outer end position of the rod plate 14, and A gear n that meshes with the rack teeth m of the vertical rod 15 is built into the vertical rod 15, and a barrel 17 is inserted into the vertical rod 15 so as to be raised and lowered by the rotation of the gear 16. Thus, a rectangular bracket plate 18 is fixed to one side of the barrel 17, and the bracket plate 18
Tsutsuroi 19a, 19b are located at two locations in the vertical and horizontal directions.
are fixed, and there are knobs 20a and 20b inside each.
Each barrel 1 is equipped with sliding rods 22a and 22b having built-in gears 21a and 21b interlocked with the gears 21a and 21b, and having lock teeth f and f' that mesh with these gears 21a and 21b.
9a, 19b, and knobs 20a, 20b.
The rotation enables appropriate horizontal reciprocating movement.

The sliding rod 22a has a two-split type stopper 23 attached to its tip to hold the torch 9 and its attached pipes, whereas the sliding rod 22b has a tip to hold the torch 9 and its attached pipes. A copying roller 24 and a limiting roller 25 are attached to keep the roller 24 in constant contact with the body 10.
In this case, the copying roller 24 is composed of two magnetic rollers 24a and 24b, which are connected to the child plate 26.
(in the illustrated example, they are provided on the upper and lower surfaces of the child plate 26), and the parent plate 27 is attached to both rollers 24 with respect to the child plate 26.
It is provided in a T-shape that coincides with the center bisector f between a and 24b, and the main plate 27 slides by engaging with a rail 28 fixed within a certain length range on the upper surface of the sliding rod 22b. It is attached to the slider 29 so that the tip of the torch 9 is always perpendicular to the object 10 to be welded via the parent plate 27.

On the other hand, a limit roller 25 is rotatably attached to the tip of the sliding rod 22b via an arm 30, and when the limit roller 25 comes into contact with the object to be welded 10 in a pressed state, during welding work to be described later. The facing distance between the tip of the torch 9 held by the torch support means and the object to be welded 10 is kept constant. 31, 32, 33 are the above knobs 1
This is a setting knob for fixing the appropriately adjusted positions of 6, 20a, and 20b.

In the present invention, approximately the front half of the swing plate 14 is configured to fit into the lower surface of the work table 3, and the table 3 is located near the front edge of the swing plate 14.
A motor 35 is attached to the back surface of the sliding plate 14 so that it can rotate including the rails 6, 6' on which it is slidably mounted. Specifically, as shown in FIG. A circular hole 36 is bored near the moving plate 14 supported by the support shaft 13, and a U-shaped drive roller 37 made of a magnetic material attached to the rotating shaft of the motor 35 is pivotally supported in the circular hole 36. A pin shaft 39 protruding from the lower surface of the bracket 38 is connected to the spring 4.
(In the illustrated example, the support shaft 13 and pin shaft 39 are installed on the same straight line, but if they are not installed on the same straight line, a bending moment will act on the plate surface between the two shafts.) As a result, the circumferential surface of the drive roller 37 is resiliently pressed against the back surface of the table 3 and held therein, while the main body of the motor 35 is held in place by the circular hole 36 formed therein. A rudder plate 42 is suspended from the main body of the motor 35 with respect to the U-shaped bracket 41 which is installed at a slightly rearward position, and the rudder plate 42 is screwed in horizontally from both side walls of the U-shaped bracket 41. By appropriately rotating the screw rods 43a, 43b from the outside and bringing the tips of the screw rods 43a, 43b into contact with the rudder plate 42, the swing plate 1 of the motor 35 is rotated.
Specifically, the angle at which the driving roller 37 makes pressure contact with the lower surface of the table 3 can be changed as appropriate. The drive roller 37 is inclined toward the inside of the table 3 by approximately 1° to 2° in order to be able to rotate smoothly without causing any damage.

Reference numeral 44 denotes a screw lever for releasing the pressing contact of the drive roller 37 against the back surface of the table 3, and the tip V of the lever is fixed to the bracket 38, while the rear end W of the lever projects outward from the table 3. By lifting the rear end W of the lever upward in the configuration, the roller p serving as a fulcrum comes into contact with the back surface of the table 3 and supports the support bracket 3 of the drive roller 37.
8 is pushed down to move the drive roller 37 away from the back surface of the table against the spring 40, and in this state, the torch support means can move freely.

Next, the effect will be explained. In the first illustrated example, fillet welding is performed between a rectangular cylinder column 10a and a seat plate 10b as a welded object 10, and when the welded object 10 is placed on a table 3 as in the illustrated example, The tip of the torch 9 is set at an appropriate height and a certain angle necessary for welding with respect to the welding point k.
That is, while loosening the knobs 31, 32, and 33 of the torch support means, the copying rollers 24a, 24b are brought into contact with the circumferential surface of the rectangular tube column 10a, and the knobs 16, 20a, and 20b are rotated as appropriate with the sliding rod 22b being perpendicular to each other. , the tip of the torch 9 is adjusted to a position suitable for welding, and in this state the limiting roller 25 is brought into contact with the square tube column 10a.
Set 2,33. With this adjustment operation, the sliding rod 2
If the lengths of the rollers 2a and 22b are insufficient, the lever 44 is appropriately operated to adjust the contact position between the drive roller 37 and the back surface of the table 3 to be different.

When the above work is completed, the start button on the operation panel (not shown) is turned on, and the motor 35 is turned on.
At the same time as the is driven, an arc current flows, and the welding wire is sent out at a predetermined constant speed to perform welding work. At this time, the drive roller 37 is given an inclination angle of 1° to 2° toward the inside of the table at the point of contact with the back surface of the table 3.
In addition, the cylindrical body 4 in which the sliding plate 14 is rotatable, and the rails 6, 6' of the bracket 7 attached to the cylindrical body 4
Since the top of the table 3 is slidably provided, the back surface of the table 3 is rotated so that the distance between the limit roller 25 and the torch support means is kept constant while the limit roller 25 is always pressed into contact with the square tube column 10a. It becomes.

On the other hand, the copying rollers 24a and 24b constantly hold the sliding rod 22b in a perpendicular state that coincides with the center bisector f between the rollers 24a and 24b via the main plate 27 while contacting the outer peripheral surface of the square tube column 10a. (At this time, the swing plate 14 swings appropriately around the support shaft 13.) As a result, the tip angle of the torch 9 is always maintained at a constant condition, and the rotation of the swing plate 14 is It cannot be changed during operation. On the other hand, when the rocking plate 14 rotates once or several times while performing the welding work, an off button on the control panel is turned on in response to a command from an encoder (not shown), and the welding work including stopping the drive of the motor 35 is completed. It will become.

During the rotation of the rocking plate 14, the sliding plate 12 supporting the rocking plate 14 moves around the main shaft 2 together with the rails 6, 6' while appropriately sliding on the rails 6, 6'. It rotates through the

As described above, in the welding operation of the present invention, when the object to be welded is placed on the table, the torch support means having the above structure is operated as appropriate to position the torch toward the welding location, and the rest is done by copying rollers and limiting rollers. When the welding machine contacts the object to be welded, the welding process will be performed automatically by simply inputting the welding conditions (feed rate, etc.) into the control panel, even if the shape of the object to be welded is different each time. Automatic welding work can be carried out without any problem even if the position on the table is different, and the initial teaching work in the past is no longer required, resulting in a dramatic improvement in work efficiency. It is something that can be achieved.

[Brief explanation of drawings]

The attached drawings show an example of the implementation of the device of the present invention, in which Fig. 1 is a front view, Fig. 2 is a side view, and Fig. 3 is a side view.
The figure is a detailed enlarged view of a partially broken part of the drive roller.
4 is a cross-sectional view taken along the line X--X in FIG. 3, and FIG. 5 is a partial plan view of FIG. 1. 1... Base board, 2... Main shaft, 3... Table, 4
... Cylinder body, 6, 6' ... Rail, 8 ... Torch support means, 9 ... Torch, 10 ... Welded object, 1
2... Sliding plate, 14... Rocking plate, 17... Cylindrical case,
18...Bracket plate, 22d, 22b...Sliding rod, 24...Copying roller, 25...Limiting roller,
26... Child plate, 27... Main plate, 35... Motor, 37... Driving roller, 44... Screw lever.

Claims (1)

[Claims] 1. A table in a horizontal state is fixed at a constant height position of the main spindle that is set upright on a base plate, and a cylinder body is arranged so as to be rotatable around the outer circumference of the main spindle, and a horizontal table is placed on the upper part of the cylinder body. A rail of a certain length protruding in the direction and a sliding plate that slides on the rail are provided, and a rocking plate supported on a support shaft and rotatable is provided on the sliding plate, and the rocking Approximately the front half of the plates are placed in an overlapping state with a certain gap under the back surface of the table, and within the gap, a drive roller for rotating the swing plate is placed at a point of contact with the back surface of the table, facing the inside of the table by 1° to 100 degrees. A torch support means is installed on the oscillating plate so that the torch can be moved vertically and horizontally relative to the welding location, and the torch Two copying rollers made of magnetic material rotate while adhering to the object to be welded so that the tip position of the oscillator remains constant during the rotation of the rocking plate, and makes the torch support means perpendicular to each other. A limiting roller is attached to hold the workpiece while contacting it, and the sliding plate is driven by the drive roller and slides appropriately on the rail, rotating along with the rail around the main shaft via the cylinder body. Torch rotating automatic welding device featuring a unique configuration.