JP2747727B2 - Automatic welding equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic welding device for welding a section steel or the like.

[Prior art] Conventionally, for example, in the case of manufacturing a cross column by combining and welding H-type steel and T-type steel, the two types of steel are assembled manually by a jig after a scribing operation, and the final welding is manually performed after a temporary welding. Was applied.

[Problems to be Solved by the Invention] In the prior art, since the main welding is performed after manual assembling and temporary welding, there is a problem that the working efficiency is inferior.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic welding apparatus which solves the above-mentioned problems and automates from positioning to welding in the welding of mold steels.

[Means for Solving the Problems] The present invention provides a rotary driving roller for clamping a lower work, a clamp receiving roller opposed to the rotary driving roller,
A pair of right and left clamp rollers for holding the upper work provided above the lower work, a pressing roller for pressing the upper part of the upper work, a lower receiving roller opposed to the pressing roller, It consists of a welding torch provided facing the welded part.

[Operation] The lower work is sandwiched between the rotary drive roller and the clamp receiving roller and sent out. The upper work is held at an arbitrary set position on the lower work by a pair of right and left clamp rollers. Since the upper and lower works are not pressed and held by the rollers, the welded portion between the lower and upper works can be continuously welded by the welding torch.

Embodiment Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

Reference numeral 1 denotes a gate-shaped frame, and a carry-in roller base 3 and a carry-out roller base 4 are juxtaposed in the front-rear direction of a base 2 of the frame 1 so as to be substantially flush with the base 2. An interval 5 is formed at the center of the carry-in roller base 3 and the carry-out roller base 4 in the feed direction. 6 is the base 2
The lower receiving roller 6 is provided below the vertical center axis X and has a horizontal axis, and the lower receiving roller 6 is rotatably provided on the mounting arm 7.
Is connected to a screw rod 9 connected to a control motor 8 and moves up and down. Reference numeral 10 denotes a fixed roller base provided on one side of the base 2, and a plurality of idler rollers 12 whose axes are oriented sideways are arranged on a frame 11 fixed to the base 2. Reference numerals 13, 14, 15 denote first to third rotary drive rollers provided on the other side of the base 2 so as to face the fixed roller base 10, and these first to third rotary drive rollers 13, 14, 15 is the loading roller base 3
Are arranged side by side with their respective axes extending vertically toward the discharge side roller base 4. First to third rotary drive rollers
13, 14, and 15 are mounting bases slidably provided on the base 2.
The mounting base 16 can be moved in and out in and out by a control motor 17 provided in the base 2.
The motors 13, 14 and 15 can be driven to rotate by motors (not shown) built in the base 2. At the distal end of these mounting bases 16, that is, below the inside of the first to third rotary drive rollers 13, 14, 15, idler rollers 21 having their respective axes oriented sideways are substantially flush with the fixed roller base 10. It is provided in. Reference numerals 22, 23, and 24 denote first to third clamp receiving rollers provided to face the first to third rotary driving rollers 13, 14, 15, respectively. The first, second, and third clamp receiving rollers are provided. The rollers 22, 23, 24 are provided at the tip of a mounting base (not shown) which is slidable on the base 2 with each axis line oriented vertically, and is freely rotatable. The mounting bases of the first and second clamp receiving rollers 22 and 23 are advanced and retracted by a first hydraulic cylinder 20, and the third clamp receiving roller 24 is advanced and retracted by a second hydraulic cylinder 20A. Reference numerals 26, 27, 27A and 28 denote first to fourth width guide fixing rollers which are one clamp roller provided above the other side of the central axis X. , 27, 27A, and 28 are juxtaposed from the carry-in roller base 3 to the carry-out roller base 4. The first to third width guide fixing rollers 26, 27, 27A, 28 are L-shaped mounting arms 2.
Each axial direction is provided at the tip of 9,29A. 30,
31 is a first and second width guide outer roller which is the other clamp roller provided opposite to the first and fourth width guide fixing rollers 26 and 28, and 32 and 32A are the second and fourth width guide outer rollers. The third and fourth width guide inner rollers, which are the other clamp rollers provided opposite the third width guide fixing rollers 27 and 27A, and are intermediate between the first and second width guide outer rollers 30 and 31. Are provided with third and fourth width guide inner rollers 32, 32A, which are provided at the tips of L-shaped mounting arms 33, 33A in the axial direction.
The mounting arms 29 of the first and fourth width guide fixing rollers 26, 28 and the mounting arms 33 of the first and second width guide outer rollers 30, 31 are adjusted to the same height. I have. That is, the screw rod 3 is
The bases (not shown) of the mounting arms 29, 33 are screwed to the screw rods 35, 36, and a chain is attached to the upper ends of the screw rods 35, 36. A control motor (not shown) is connected via (not shown). Therefore, in response to the rotation of the control motor 37, the mounting arms 29 and 33 are moved up and down while maintaining the same height. Similarly, other second and third width guide fixing rollers
27,27A and third and fourth width guide inner rollers 32,3
Similarly, the mounting arms 29A and 33A corresponding to 2A can be moved up and down while maintaining the same height with each other by other screw rods (not shown), chains (not shown), motors (not shown), and the like. ing. Further, a control motor (not shown) is provided on each of the mounting arms 33 and 33A, and the first and second width guide outer rollers 3 are controlled by the control motor.
0,31 and third and fourth width guide inner rollers 32,32A
Are the first to fourth width guide fixing rollers 26, 27, 27A,
It is designed to be able to contact and separate from 28. Reference numeral 39 denotes a pressing roller. The pressing roller 39 is provided via a lifting table 42 at the lower end of a rod 41 of a hydraulic cylinder 40 which is erected above the center of the frame 1 with the axial direction being horizontal and vertically erected downward. In addition, an electrode plate 43 is provided on the lift table 42 downward through a spring (not shown).

Reference numeral 44 denotes a pair of left and right welding torches, which are provided obliquely upward toward a welding portion to be described later, and a lifting / lowering table 44D can be moved up and down by a vertical control motor 45.
The width direction control motor 38 allows the base 44E to move in and out of the base 44E. A supply device 44 is provided so that a welding wire (not shown) is supplied to the welding torch 44.
A is connected. 47 is a flux supply pipe provided on the front left and right of the welding torch 44, and 48 is a flux recovery pipe provided on the rear left and right of the welding torch 44.The supply pipe 47 and the recovery pipe 48 are provided.
Can be fixed at a predetermined location by manual operation, so that the flux supplied from the supply pipe 47 is recovered by a recovery box (not shown) by the recovery pipe 48 and then supplied again by the supply pipe 47. Has become. On the tip side of the welding torch 44, a proximity switch 44B for detecting a horizontal distance and a proximity switch 44C for detecting a vertical direction are mounted.

 Next, the operation of the above configuration will be described.

The embodiment shows a case where a T-type steel B as an upper work is welded to a central upper surface of an H-type steel A as a lower work. In this case, a side surface of an upper plate portion of the T-type steel B is set as a reference vertical surface Y, and T With the lower ends of both side plates of the section steel B as the reference horizontal plane Z, the dimensions of the H-section steel A and the T-section steel B at the time of welding are controlled in advance by the control panel.
49, stored in a microcomputer (not shown). Then, the H-shaped steel A was slid from the loading roller base 3 to the base 2 side and set. The crane is removed while the end face of the T-section steel B and the end face of the H-section steel A are aligned with the flat section of the section steel A.
At this time, it is detected that the mold steels A and B have been set by the photoelectric tube (not shown) for detecting the mold steel set provided on the base 2, and this is input to the control panel 49. Next, when an automatic switch (not shown) of the control panel 49 is operated, the mounting base 16 of the first to third rotary drive rollers 13, 14, 15 is advanced by a predetermined length by the control motor and is moved to the side plate portion of the H-section steel A. Rotary drive roller 13,1
4 abuts. Also, the first hydraulic cylinder 20 operates,
The H-section steel A is used for the first and second rotary drive rollers 13 and 14.
And the first and second clamp receiving rollers 22 and 23. Further, the lower receiving roller 6 is raised by a predetermined length by the control motor 8 and contacts the lower surface of the flat plate portion of the H-section steel A. At this time, the lower end of the other side plate portion of the H-section steel A is supported by the idler roller 12. Thus, the H-section steel A is set at a predetermined position with respect to the base 2. Next, together with the first to fourth width guide fixing rollers 26, 27, 27A, the first
The second width guide outer rollers 30, 31 and the width guide inner rollers 32, 32A are controlled by a control motor to move up and down a predetermined length, and the control motor causes the first and second width guide outer rollers 30, 31 to move up and down. And the third and fourth width guide inner rollers 32 and 32A are controlled to press against one side of the vertical plate of the T-shaped steel B, and the holding roller 39 is pressed against the upper plate of the T-shaped steel B by the hydraulic cylinder 40. Thus, the H-shaped steel A and the T-shaped steel B are positioned. At this time, the H-section steels A and T
The joining portion between the mold steels B is set so that the upward force of the lower receiving roller 6 and the downward force of the pressing roller 39 adhere to each other so that the H-shaped steel A and the T-shaped steel B are not distorted. Electrode plate at the same time
43 also contacts the upper plate of the T-section steel B. Thus, the T-section steel B is positioned. Then, the first and second rotary drive rollers 13 and 14 are rotated to draw in the H-shaped steel A together with the T-shaped steel B. When the H-section steel A moves to a predetermined position, it is detected by a starting end detecting photoelectric tube (not shown) provided on the base 2, and the welding is performed by operating a welding torch positioning switch (not shown) provided on the control panel 49. Torch 44 is H-shaped steel A and T
The control motor 45 and the control motor 38 move forward toward the welded portion 50 of the section steel B. Then, the position is detected by the proximity switches 44B and 44C, and stops at a predetermined position. A welding torch is operated by a welding wire manual feed button (not shown) on the control panel 49
The tip of 44 is brought close to the weld 50, and the welding position is confirmed.
Next, a flux cock (not shown) is opened to supply the flux. When the automatic welding button (not shown) of the control panel 49 is operated in the above state, the first and second rotary drive rollers 13, 14 are rotated when the first and second rotary drive rollers 13, 14 are rotated. Or third clamp receiving roller 22,2
The H-shaped steel A sandwiched between 3, 24 is transferred together with the T-shaped steel B, and at the same time, the wire is supplied from the welding torch 44, and at the same time, the flux is supplied from the supply pipe 47 to start welding. When the H-section steel A passes through the third rotary drive roller 15 by welding a certain distance in this way, the moving distance of the first and second rotary drive rollers 13 and 14 according to the number of rotations from the start of rotation is reduced. According to the calculation, the third clamp receiving roller 24 moves to sandwich the H-shaped steel A, and the H-shaped steel A is sequentially transferred by the rotation of the first to third rotary drive rollers 13, 14, and 15.

While being welded in this way, H-shaped steel A, T-shaped steel B
Moves forward and welding is continued.

Thus, the side plate portion of the H-shaped steel A integrated with the T-shaped steel B is sandwiched between the first to third rotary drive rollers 13, 14, 15 and the first to third clamp receiving rollers 22, 23, 24. The H-shaped steel A is welded while being fed together with the T-shaped steel B.

In this way, welding is sequentially performed from the beginning to the end of the H-shaped steel A and the T-shaped steel B. When the welding is completed, this is detected by a termination detecting photoelectric tube (not shown), the power supply for welding is cut off, and the welding torch 44 retreats obliquely upward.
Further, the first to third clamp receiving rollers 22, 23, 24 are slightly moved inward by the hydraulic cylinders 20, 20A to release the holding of the H-shaped steel A, and the pressing roller 39 is moved by the hydraulic cylinder 40.
Rises together with the electrode plate 43 to release the holding of the T-section steel B.

As described above, the H-shaped steel A is supplied to the first to third rotary drive rollers 13, 14, 15 and the first to third clamp receiving rollers.
22, 23, 24, and 25, and the T-section steel B is fixed to the first to fourth width guide fixing rollers 26, 27, 27A, and 28.
And the first and second width guide outer rollers 30, 31 and the width guide inner rollers 32, 32A can be automatically positioned.

Further, the lower surface of the H-shaped steel A is pressed upward by the lower receiving roller 6, and the upper surface of the T-shaped steel B is pressed by the pressing roller 39.
That is, the H-shaped steels A and T can be set by pressing the H-shaped steels A and T from above and below so that there is no gap between the joints of the H-shaped steel A and the T-shaped steel B in the welded portion 50.
Welding can be performed in a state where distortion in the shape steel B has been eliminated, and accurate finishing can be achieved.

Further, the H-section steel A is used for the first to third rotary drive rollers 1.
With the automatic transfer with the rotation of 3,14,15,
Automatic welding can be performed with the welding torch 44 facing the welding portion 50. When a new T-shaped steel is welded to the upper surface of the H-shaped steel to which the T-shaped steel is fixed in advance, the T-shaped steel may be inserted into the space.

The present invention is not limited to the above-described embodiment. For example, as shown in FIG. 6, after once welding the H-shaped steel A and the T-shaped steel B, the welding is reversed and the T-shaped steel C is again welded or the drive roll is driven. Various modifications are possible, such as using an electric motor instead of a hydraulic cylinder, or welding using a jig or the like.

[Effects of the Invention] The present invention provides a rotary drive roller for holding a lower workpiece, a clamp receiving roller opposed to the rotary drive roller,
A pair of right and left clamp rollers for holding the upper work provided above the lower work, a pressing roller for pressing the upper work, and a welding torch provided to face a weld between the lower work and the upper work. The rotary drive roller and the clamp receiving roller position the lower work and convey the lower work, and the pair of clamp rollers position the upper work, and further press the upper work and the lower work in the vertical direction. The upper work and the lower work can be welded in close contact with each other by being pressed by the lower receiving roller, and the lower work and the upper work can be automatically welded by setting without distortion. In addition, high-quality welding can be performed without special skills.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a plan view, FIG. 4 is a perspective view of a main part, and FIG. FIG. 6 is an explanatory view showing another embodiment. 6 Lower support roller 13,14,15 Rotary drive roller 22,23,24 Clamp receiver roller 26,27,27A, 28 Width guide fixing roller (clamp roller) 30,31 Width guide Outer roller (clamp roller) 32,32A ... Width guide inner roller (clamp roller) 39 ... Presser roller 44 ... Welding torch 50 ... Welded part A ... H-shaped steel (lower work) B ... T-shaped steel (upper) work)

Claims (1)

(57) [Claims] A rotary driving roller for clamping a lower workpiece, a clamp receiving roller opposed to the rotary driving roller,
A pair of left and right clamp rollers for holding the upper work provided above the lower work, a pressing roller for pressing the upper part of the upper work, a lower receiving roller for pressing the lower work opposing the pressing roller, An automatic welding apparatus comprising: a welding torch provided to face a welding portion between the lower work and the upper work.