JPS5932471Y2 - welding equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a welding device for welding the circumference of a fixed pipe and an object to be welded, such as a pipe or a flange. This invention relates to an improvement in the clamp mechanism.

Conventionally, there has been a device of this type as shown in FIG.

In the figure, 1 is the object to be welded, 2 is the main body of the welding device, and 2a
is an opening provided in the main body 2, and the workpiece 1 to be welded is attached to and removed from the welding apparatus within this opening 2a.

3 and 4 are fixing members for fixing this main body 2 to the workpiece 1 to be welded, and one fixing member 3 is fixed to the main body 2.

The other fixed member 4 is connected to a handle 5, and is configured to be moved in the left-right direction in the figure by rotating the handle 5.

6 is a rotary plate provided on the upper part of the main body 2; 1 is a welding head; this welding head 1 is attached to the rotary plate 6 and rotates around the workpiece 1 together with the rotary plate 6; .

8 is a position adjustment device for adjusting the welding head I in the radial direction; 9
1 is a position adjustment device for adjusting the welding head 1 in the axial direction; 10 is a wire reel in which the necessary amount of filler rod to be supplied to the welding area is stored in advance; and 11 is a conduit tube from which the filler rod is transferred from the wire reel 10. This is a wire feeding device for automatically feeding the wire to the wire guide 13 via the wire guide 12.

14 is a power cable for sending welding power, shielding gas, etc. to the welding head, and 15 is a cable feed roller, which wraps the conduit tube 12 and power cable 14 around the cable guide 16 in synchronization with the 10 rotations of the welding head. .

Reference numeral 11 is a motor that drives and rotates the welding head 7 via gears, etc., and 18 is a handle for carrying the main body 2.

FIG. 2 shows a mechanical part for attaching and fixing the welding apparatus to the workpiece 1. One fixing member 3 is fixed to the main body 2 of the welding apparatus by a screw 19.

The other fixed member 4 is fixed with a screw 22 to the upper end of a clamp lever 21 which is rotatably provided around a pin 20, and furthermore, the lower end of this clamp lever 21 is connected to the handle 5 by a pin 23. .

When the handle 5 is rotated, the clamp lever 2 is moved by the screw member 24 screwed into the inside of the handle 5.
1 rotates around a pin 20, and the fixing member 4 is configured to move forward and backward relative to the workpiece 1 to be welded.

Next, the operation of attaching and fixing the welding device to the workpiece 1 will be explained.

The handle 5 is rotated to rotate the clamp lever 23 clockwise in the figure, so that the distance between the two fixing members 3 and 40 is slightly wider than the outer diameter of the workpiece 1 to be welded.

In this state, the welding device is moved to a position where the fixing member 34 portion engages with the workpiece 1 to be welded.

Next, the handle 5 is rotated so that the clamp lever 21 rotates counterclockwise, and the workpiece 1 is clamped between the two fixing members 3 and 4, thereby fixing the welding device to the workpiece 1. Complete.

Since the clamping mechanism of the conventional welding device is constructed as described above, when the clamp lever 21 is rotated counterclockwise around the pin 20 to clamp the workpiece 1, the fixing member 4 is Since the moving distances of the two contact surfaces 4a and 4b are different, usually only one of the contact surfaces comes into contact with the workpiece 1 having a different pipe diameter, and the direction of the pressing force is different. two contact surfaces 3a of the fixed member 3,
3b, the clamping force was reduced, and stable fixation could not be obtained.

Also, for fixing, move the fixing member 4. The rotation distance is between each abutting part of the two fixing members 3 and 4 and the welded object 1.
Since the distance tl plus the distance t2 to the outer circumference of the handle 5 is large, the amount by which the handle 5 must be rotated increases, resulting in poor work efficiency.

This invention was made in order to eliminate the above-mentioned drawbacks, and the clamping mechanism for attaching and fixing the welding device to the workpiece is fixed to a fixing member having two abutting parts fixed to the main body of the welding device. By suppressing and holding the workpiece by the fixing member that moves in the direction of the center angle of this contact part,
The purpose of the present invention is to provide a welding device having a clamping mechanism that stably fixes objects to be welded even if the pipe diameters differ, reduces the moving distance of the fixed member on the moving side, and has high work efficiency. .

An embodiment of this invention will be described below with reference to the drawings.

In FIG. 3, the same reference numerals as in FIG. 2 indicate the same or corresponding parts, and 25 is fixed to the upper part of the clamp lever 21.
The fixing member 25 is in contact with the workpiece 1 at the contact portion 25a, and the fixing member 25 is moved toward the center of the two contact portions 3a and 3b of the fixing member 3 fixed to the main body 2.

In the clamp mechanism configured in this manner, when the handle 5 is rotated, the clamp lever 21 rotates around the pin 20, and the fixing member 25 is moved approximately toward the center of the contact portions 3a and 3b of the other fixing member 3. Advances and retreats.

Therefore, the object to be welded 1 and each contact portion 3a, 3b.

25a reliably connects 3 regardless of the size of the pipe diameter of the workpiece 1.
A stable clamping force can be obtained by making contact in two positions.

Furthermore, when attaching and detaching the welding device to and from the workpiece 1, the distance between the fixing member 25 and the outer periphery of the fixing member 30 is t3 (as shown in FIG.
is almost horizontal to the center O of the workpiece 1, t3
is approximately O) and the distance t4 from the contact portion 25a of the fixing member 25 to the outer periphery (t3 is approximately equal to t2 shown in FIG. 2 when arranged as shown in FIG. 3). If possible, this corresponds to about 1/2 of the distance of the conventional device, which is the sum of tl and t2.

In the above embodiment, the abutting portion 3a of the fixing member 3 is disposed at a position substantially horizontal to the center O of the object to be welded 1, and the fixing member 25 is disposed between the two abutting portions 3a of the fixing member 3. , 3b
Although we have described the case in which the fixed member 25 is moved forward and backward in the direction of the center position, the range in which the moving distance of the fixed member 25 is minimized is the position ( When the side part of the opening 2a is placed between the center position) or a position moved clockwise by an angle θ from this horizontal position (same position as shown in Fig. 2). be.

In addition, within this range, in particular, the contact portion 3 of the fixing member 3
a at the above-mentioned horizontal position, and the other abutting part 3b is provided at the lower part (the bottom of the opening 2a is at the center position), when the welding device is attached to the workpiece 1, the abutting part 3b It is effective to allow 3b to act as a stopper.

Furthermore, although the case is shown in which the fixing member 25 is moved forward and backward via the clamp lever 21, the distal end of the handle 5 directly contacts the workpiece 1 without providing the clamp lever 21, and this Even if the tip moves forward and backward to press the object to be welded 1, the same effect as in the above embodiment can be obtained.

Further, the two contact portions 3a and 3b do not need to be provided on one fixing member 3, and may be independently fixed to the main body 1.

As described above, this device is fixed to the main body of the welding device, and has a contact member that contacts the outer periphery of the workpiece at multiple points, and further advances and retreats between the contact points of the contact member. Since the proboscis to be welded is pressed and clamped by another abutting member that can be provided, stable fixation can be obtained even for objects to be welded with different pipe diameters, and there is no need to worry when attaching or detaching the welding device. Since the moving distance of the contact member is short, it is effective in improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional welding device, FIG. 2 is a front view showing the clamp mechanism of FIG. 1, and FIG. 3 is a front view showing an embodiment of this invention. In the figures, the same reference numerals indicate the same or equivalent parts, 1 is the welded snout, 2 is the main body, 3 and 25 are fixed members, 3a, 3b
, 25a is a contact portion, 5 is a handle, and 20 is a clamp lever.

Claims (2)

[Scope of utility model registration request] (1) In a welding device having an opening for intervening the welded object and a fixing mechanism for the welded object, the welding device is fixed to the welding device main body and comes in contact with the outer periphery of the welded object at multiple points. A movable contact member that is provided on the opposite side of the contact member across the object to be welded and that can move forward and backward between the contact points of the contact member. Welding equipment. (2) One of the contact points of the contact member fixed to the welding equipment main body against the workpiece is located at the side of the opening at approximately the center, and the other is located at the bottom of the opening at approximately the center. The welding device according to item 1 above, characterized in that: