JPS6082279A - Automatic welding machine - Google Patents

Abstract

PURPOSE:To provide a titled device which subjects a flange part to normal welding in normal welding of the tack-welded flange at the end edge of a round-cornered square pipe by rotating intermittently the pipe at the round-cornered square part to a prescribed angle, operating a torch to follow up the transfer to the round squared part and thereafter transferring the torch to the flat part and welding said part. CONSTITUTION:A round-cornered square pipe 3 with which a flange 4a is tack- welded is inclined to a suitable angle and is fastened and held to the shaft 12 of a rotating means 5. A roller 28 in contact with the outside circumference of the pipe is traversed to adapt itself to the rotation, contact and transfer to the round angle part and is horizontally moved in a flat part 3e. A torch 22 operated to follow up the roller 28 faces always the weld zone in an adequate position and welds uniformly the entire circumference of said zone. The follow-up is accomplished by computer control. Any round-cornered square pipe is thus similarly welded with the flange.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic welding machine for forming joint pipes that connect vertical and horizontal frames in steel frames used in constructing high-rise buildings and the like.

Rounded-corner vibes (so-called J-ram) are often used in recent high-rise buildings. The joint pipe referred to here mainly relates to square pipes with rounded corners (hereinafter referred to as pipes).

In this type of joint pipe, a flange having a diameter larger than that of the pipe is brought into contact with both opening edges of a pipe that has been cut to a suitable size and has been subjected to bevel welding processing in advance, and the contact area between the flange and the pipe is are welded together. The flange of this joint pipe is necessary when connecting vertical frame assemblies in the vertical direction or when connecting beams for composing a floor in the left and right direction. Sufficient strength is required since the intersections of each frame are used, which is the key point. Therefore, the welding between the pipe and the flange must be uniform and strong, which requires advanced welding techniques, which has traditionally been difficult to automate.

In view of these points, the present invention aims to improve workability and productivity by automating the welding of the welded portion of a pipe and a flange, and an automatic welding machine that can improve the accuracy and strength of /8 joints. is intended to provide.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below with reference to the drawings.

FIG. 1 shows an overall view of an automatic welding machine. The workpiece (2), which is a joint pipe, has flanges (4) attached to both opening edges (3a) of a nine-cornered pipe (3) that has been subjected to bevel welding processing in advance. The automatic welding machine +11 welds the pipe (3) of the workpiece (2).
) and the flange (4) contact M (the part to be welded (7
) is in explosive contact with the entire circumference. The welding machine (1
) comprises a vibrator rotating means (5) for rotating the workpiece (2) around the axis of the workpiece, and the welding part (
7), and a torch moving means (6) for moving the 1-te (22) along the torch.

The pipe rotation means (5) extends diagonally downward and forward from the support body 00) erected on the two pedestals (8) with an arm portion <11).
is extended, a rotating shaft (12) is connected to the tip of the arm, and a flange receiving portion (15) is fixed to the tip of the rotating shaft. This rotating shaft (12) is installed at the rear of the support body 00) so that its inclination angle can be changed by a handle (13) attached (=JLJ), and the first motor (
14). From the viewpoint of welding, it is preferable to select the inclination angle of the rotating shaft (I2) to be approximately 30 degrees to 45 degrees. The workpiece part JA F21 is a flange receiving part (15) taken on this rotating shaft (12).
), one flange (4) temporarily welded to the pipe (3).
a) are brought into contact with each other, and the center of rotation of the rotating shaft (12) and the axial center of the workpiece (2) are made to coincide with each other, and the workpiece (2) is held securely on the rotating shaft (12). That is, the angle of inclination of the held workpiece (2) matches the angle of inclination of the rotating shaft (12). in this way.

If the inclination angle is within the range of 30 degrees to 45 degrees, as shown in Figure 3, the weld build-up (9) will be formed almost evenly on the pipe (3) and flange (4) during welding, making it the strongest. This is because it is possible to perform accurate welding. However, even if this angle of inclination is zero, that is, the workpiece (2) is in a horizontal state, welding is possible. As an engagement means.

For example, as shown in Fig. 2, a support rod (40) is provided protruding from the center of rotation of the flange receiving portion (15), while a support rod (40) is provided at the center of both flanges (4a) (4b) of the workpiece (2). The through hole (41) (41) is fitted into the support rod (40), and the support rod (40) is flanged at the tip (40a) protruding from the other flange (4b). 42)
By applying this, the workpiece (2) becomes the flange receiving part (15)
and a flanged nut (42). This pipe rotating means (5) intermittently rotates the pipe (3) in one direction by a predetermined angle. Here, the predetermined angle means that the rotating direction of the knob (3) is the direction (A) in the drawing, as shown in FIG.

This is the angle at which one corner (3b) of the pipe (3) rotates to the next adjacent corner (3b'), which is 90 in the case of two pipes.
degree.

Said 1.-ch transfer means (6) is said pipe rotation means (
5) of the workpiece (2) which is engaged and held by the first guide plate (16) which is suspended horizontally, and the second guide plate (16) which is movably attached to the first guide plate in the left and right direction. A guide plate (17) and a third guide plate (1) attached to the second guide plate so as to be vertically movable.
8) and a self-propelled mechanism (20) attached to the third guide plate,
There is a connection between the I-chi swing mechanism (21) and the 1-chi (22). Zunawaji, self-propelled mechanism (20) and torch (
22) is a second guide plate (17) engraved on the first guide plate (16).
) and the third guide plate (18), it is possible to move in the left-right direction and also to move up and down at the same time. Self-propelled mechanism (20) and 1-chi (22)
) is provided so as to be movable in the vertical direction as shown in FIG.

This is because the welding position (S") changes upward as the pipe (3) rotates from the reference height S) which is the welding position when the pipe (3) is not rotating.

The first guide plate (16) is horizontally suspended between a pair of columns (23) erected on both left and right sides of the pipe rotating means (5).

The connecting portion (2) of this first guide plate (16) to the column (23)
4) is formed in a disk shape, and by loosening the bolt (25), the first guide plate (16) is moved along the long arc-shaped length (26) opened in the connection portion (24). A rotation opening is provided in the circumferential direction of the portion (24). This first guide plate (16) is connected to the pipe rotating means (
It is horizontally suspended so as to be always parallel to the flange (4) of the processed part +A (2) which is engaged and held by the flange receiving part (15) of 5). The second guide plate (17)
As shown in the figure and Fig. 6, the
= J-shaped pair of first guide rollers (17a) (1
7a) is the upper edge rail portion (1) of the first guide plate (16).
Hold 6a) from both sides.

A pair of second guide rollers (17b) attached to the lower end portions on both the left and right sides sandwich the lower edge rail portion (16b) of the first guide plate (16) from both sides.

The third guide rollers (17c) (17c) attached to the upper and lower parts of the left and right sides respectively abut the recess human face part (16C) and the four part bottom part (16d) of the first guide plate (16). Each guide roller (17a) (17
b) According to (17c), the second guide plate (17) is ff
11 is attached to the guide plate (16) so as to be movable in the left and right direction. The third guide plate (18) is provided on both sides of the back side of the second guide plate (I7), facing each other in the tL1iit direction, as shown in FIGS. 1 and 7. It is inserted 11x between the guide grooves (17d) and (17d) so that it can freely move up and down. The self-propelled mechanism (2o) and the torch swinging mechanism (
21) are installed. The self-propelled mechanism (2o) is the third
A self-propelled roller (28) protrudes downward from the bottom surface (18a) of the guide plate (18) and is pivotally attached to the roller receiving portion (27) so as to be movable in the left-right direction. It is linked to the second seventh gear (31) via the first gear 1-(29) and the second gear 1-(30). The self-propelled rollers (28) are constantly pressed against the outer surface of the pipe (3) by the weight of the third guide plate (18) and the self-propelled mechanism (20) themselves.

As shown in FIG. 1, the torch swinging mechanism (21) is connected to an arm rod (32) provided laterally protruding from the lower end of the third guide plate (18). -chi (22
) A long hole (35) is formed in one end (34a) of the support rod (34) that supports the third mork (34).
6) is fitted into the eccentric shaft portion (37).

That is, the eccentric shaft portion (
37) is rotated eccentrically and one end (34a) is swung left and right, resulting in the so-called lyring>j- in which the tip (22a) of the torch (22) is swung left and right with respect to the moving direction. .

In FIG. 1, (P) is the center of swing supported by bolts or the like. In this way, the torch (22) is equipped with a self-propelled mechanism (20
), the self-propelled roller (28) moves in the same direction at the same speed as the traveling speed of the self-propelled roller (28) while swinging along the welded part (7) of the workpiece (2). be done. In this case, the torch (22) and the self-propelled mechanism (20)
The torch (22) and the self-propelled roller are arranged so that the line connecting the self-propelled roller (28) and the part where the self-propelled roller (28) contacts the outer surface of the pipe (3) is always substantially perpendicular to the direction of movement of the torch (22). (
28) are arranged. However, considering the /8 contact flow, the tip (22a) of the torch (22) is the self-propelled roller (
28) It may be arranged so that it protrudes slightly (about several millimeters) forward in the direction of movement. The tip (22a) of the torch (22) arranged in this way is connected to the self-propelled roller (22).
8), and works integrally with the workpiece (2) to be welded (
7) will be moved at a certain distance from In addition, (38
) is the first handle that moves the entire torch swinging mechanism (21) in the left-right direction, and (39) is the 1.-torch swinging mechanism (21).
This is a second handle that moves the entire body in the front and back direction.

In the welding machine (11) configured as described above, the pipe rotating means (5) has a self-propelled mechanism (20) installed in the torch moving means (6) on the -outer plane (3c) of the pipe (3).
When traveling on the top, it is stopped-U, and the self-propelled mechanism ('20)
When it approaches the corner (3b) of the pipe (3), rotation/V
and the self-propelled mechanism (20) is located at the corner (3) of the pipe (3).
When the vehicle completes running on the curved side surface (3c) of 3b), it is stopped. Moreover, the torch transfer means (6)
is configured to be able to move vertically and horizontally in accordance with the shape of the pipe (3). Namely.

Rotation operation and rotation time in which the pipe (3) is rotated by a predetermined angle by the vibrator rotation means (5) and the torch transfer means (6)
Accordingly, the traveling operation and traveling time of the self-propelled roller (28) traveling on the curved side surface (3C) of the vibrator corner portion (3b) are set to substantially match.

For example, in a large-diameter pipe, since the radius of curvature of the corner portion is large, the running time of the self-propelled roller on the curved side surface becomes long. Therefore, in this case, the rotational speed of the pipe is adjusted to be low so that the free running time of the free running roller and the rotating time of the pipe almost match.

Conversely, since the radius of curvature at the corner of a small-diameter pipe is small, the rotating speed of the pipe is adjusted quickly to match the running time of the self-propelled roller with the rotating time of the pipe. The rotational movement of this pipe (3) and the self-propelled roller (
As a means for substantially matching the running motion of the self-propelled roller (28), for example, using a timer or the like (not shown), the self-propelled roller (2
8) sets the time required for the pipe (3) to travel on the -outside plane (3e) from one side edge to the other side edge,
The pipe (3) may be rotated at each set time. Further, a detection means for detecting that the self-propelled mechanism (20) reaches the other side edge of the -outside plane (3e) of the pipe (3) is provided separately, and the detection means detects that the pipe (
3) may be provided to rotate. As such a detection means, a rim switch, a phototube switch, etc. are generally used. Furthermore, the self-propelled mechanism (20) itself may be provided with a detection means for detecting that the self-propelled mechanism (20) has reached the other side edge on the -outside plane (3c) of the pipe (3).

Next, the operation of the automatic welding machine with the above configuration will be explained in Figs.
This will be explained with reference to Tl. Self-propelled mechanism (2o) -
La (28) is constant in the left direction in the drawing from the starting point (Q) to the ending point (1?) on the -outside plane (3c) of the pipe (=()) along the base (height S). The pipe (3) is stationary during this time (see figure a). When the self-propelled roller (28) reaches the end point (R), the pipe (3) is rotated by the pipe rotation means (5). 3) starts rotating, and this rotation causes the self-propelled roller (28) to rotate.

While ascending from the reference height S,), it then retreats from the end point (R) towards the starting point (Q) (see figures b and C).
. During this time, the self-propelled roller (28) is running (rotating) on the curved side surface (3c) of the corner (3b) of the pipe (3) in the same direction at a constant speed. Figure d shows a state in which the pipe (3) has further rotated by one-half of the predetermined rotation angle (45 degrees in this case).

The self-propelled roller (28) rises from the reference height S) to the highest position, and retreats in the direction of the starting point (Q) to an intermediate position between the ending point (R) and the starting point (Q). During this time as well, the self-propelled roller (28) is running (rotating) on the curved side surface (3C) of the pipe (3) at a constant speed in the same direction. The pipe (3) further rotates at a predetermined angle (90 degrees in this case).
When it rotates, the pipe (3) stops rotating, and the self-propelled roller (28) descends again to the reference height S) and returns to the starting point (Q) (see Figure 0 and f!yJ).
. During this time, the self-propelled roller (28) is running (rotating) on the curved side surface (3c) of the pipe (3) at a constant speed in the same direction. The movement of the self-propelled roller (28) accompanying the rotation of the pipe (3) is caused by the rotation between the ribs of the pipe (31) and the self-propelled lil.
By matching the travel times of the l-ra (28) and by constantly pressing the self-propelled roller (28) against the outer surface of the pipe (3), the self-propelled roller (28) rotates at zero speed. and the rotation of the pipe (3). By repeating the above operation four times, the self-propelled El-
The self-propelled U-ra (28) runs along the entire outer circumference of the pipe (3), and the 1-chi (22) running in parallel with the self-propelled U-ra (28) runs on the welded part of the workpiece (2). 7) is welded around the entire circumference.

In addition, in the above explanation, a rectangular prism nonagonal pipe is used as an example (the operation of an automatic welding machine is explained), but polygonal nonagonal pipes such as triangular prisms, pentagonal prisms, and octagonal prisms may also be used. The automatic welding machine (1) of the present invention can also be applied to cylindrical pipes.In this case, the pipe rotating means (5) continuously rotates the pipe at a constant speed, and the torch moving means (6) moves up and down. Without moving left or right, the traveling speed of the self-propelled roller (28) and the rotational speed of the pipe are made to match, and tπ
The self-propelled roller (28) may be set to rotate at the top position of the pipe. In addition, in the above operation explanation, the self-propelled roller (28) is the starting point (Q), that is, the -outer plane (3e)
I am trying to start the operation from the - side edge.

The starting position of the self-propelled roller (28) is not limited to the starting point (Q), but may be, for example, from the center of the outer plane (3e).

As explained above, there are two automatic welding machines of the present invention.

pipe rotating means for intermittently rotating a square pipe with rounded corners in one direction at a predetermined angle sequentially about the axis of the pipe, and a constant speed while pressing the outer surface of the pipe in a direction opposite to the rotating direction of the pipe rotating means; It has a self-propelled mechanism that can move vertically and horizontally as the pipe rotates and stops by the pipe rotation means, and is arranged at a constant distance from the parts to be welded of the two members. 1. The torch is comprised of a torch moving means that moves along the welding part at a constant speed by the self-propelled mechanism, and the pipe rotating means is a self-propelled torch provided in the torch moving means. When the self-propelled mechanism travels on the outer plane of the pipe, it is stopped; when the self-propelled mechanism approaches the corner of the pipe, it is rotated; and when the self-propelled mechanism completes traveling on the curved surface of the corner of the pipe. Moreover, the moving means 1.--1 are adapted to move vertically, horizontally, and horizontally in accordance with the shape of the pipe.

The welding work of square pipes and flanges, which has been difficult to automate in the past, can be completely automated, and work efficiency and productivity can be improved. In addition, since it is possible to move 1--chi at a constant speed and at a constant distance from the welded part over the entire circumference of the welded part of the workpiece part 4A,
A uniform weld buildup can be formed over the entire circumference of the welded part, and sufficient welding strength can be ensured.

[Brief explanation of drawings]

The drawings illustrate embodiments of the present invention, and FIG. 1 is an overall perspective view of a welding machine, and FIG. 2 is a longitudinal cross-sectional view of the welded part held by the pipe rotating means. is a partial enlarged view showing the welding state of the welded part, Fig. 4 is a vertical cross-sectional view of the pipe, Fig. 5 is a diagram showing changes in the welding position of the welded part, and Fig. 6 is the same as Fig. 7 is a plan view of the second guide plate and the third guide plate, and FIG. 8 is a schematic diagram illustrating the operating state of the automatic welding machine. (1)...Automatic welding machine, (2)...Workpiece part (3)
)...Rounded corner vibrator, (4)...Flange (5)...
... Pipe rotation means, (6) ... Torch transfer means (1
6)...First guide board (17)...Second guide board. (18)...Third guide plate (20)...Self-propelled mechanism. (21)...Torch swinging mechanism (22)...Torch. (28)... Self-propelled roller applicant Koei Seiki Co., Ltd. Figure 3 2 Figure 4 □A

Claims (1)

[Claims] 1) The welded part, which is the contact area between the pipe and the flange, of a workpiece whose flanges are temporarily welded to both opening edges of a square pipe with rounded corners is permanently welded over the entire circumference. It's a welding machine. The welding machine. Pipe rotation means for intermittently rotating a square pipe with rounded corners in one direction by a predetermined angle around the axis of the pipe. A self-propelled mechanism that can run at a constant speed while pressing on the outer surface of the pipe in a direction opposite to the rotational direction of the pipe rotation means, and can also move vertically and horizontally as the pipe rotates and stops by the pipe rotation means. Along with having. The torch is arranged at a constant distance from the part to be welded of the workpiece and includes a torch moving means that allows the self-propelled mechanism to move the torch along the part to be welded at a constant speed. The pipe rotation means is stopped when the self-propelled mechanism provided in the torch transfer means travels on the outer plane of the pipe, and rotated when the self-propelled mechanism approaches a corner of the pipe, Moreover, the self-propelled mechanism is configured to be stopped when the self-propelled mechanism completes traveling on the curved surface of the corner of the pipe. An automatic welding machine characterized in that the torch moving means can be moved up, down, left and right in accordance with the shape of the pipe.