JP2000263293A - Positioning device for backing metal of welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable that the projecting dimensions of the backing metals of both ends are made equal or are made different each other by providing an automatic centering function in regard to a device positioning the column material of a steel frame structure, the backing metal of a joining block and a flange material. SOLUTION: A device is equipped with two (left and right) stoppers 26, 26 provided movably on a straight line in the approaching and separating directions each other on a base 5, the two thread levers 11, 12 of the same lead having right-hand threads on the one side and left-hand threads on another side, which have been arranged paralleling to the moving directions of the stopers 26, 26, a differential arrangement 14 connecting these two thread levers 11, 12 and the differential locking device of the differential arrangement 14. Even when a welding member has been placed in a deviated place, when the stopper on the one side is abutted, the rotation of the thread lever on the side is stopped, the rotation of the thread lever on another side is continued, and a measurement standard position is set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for positioning a backing metal to be mounted along a welding side of a member to be welded, and relates to a member such as a column member of a steel building and a joining block for connecting the same. The present invention relates to a positioning device which is particularly suitable for positioning a backing metal, a flange material, and the like to be attached to a device.

[0002]

2. Description of the Related Art When two members are welded and integrated by fillet welding or butt welding, a groove is provided on a side to be welded (welded side), and a flow of molten metal flows behind the groove. It is common to attach a backing to prevent blow-through of arcs and arcs. The backing metal is a thin strip of plate material,
Attach it while projecting it from the side to be welded by a predetermined dimension.

[0003] The pillars of a steel building are also integrated by welding, and a backing metal is provided at the welded portion.
The columns of a steel building are formed by sequentially welding the columns and the joining blocks. The column is a simple prismatic column made of sheet metal, and the joining block is made by welding blind flanges to both ends of a short rectangular tube and welding a member called a blade to connect the beam to the side. is there. When welding a blind flange to a square tube material of a column, make a groove at both ends of the square tube material and attach a backing metal. When welding the column and the joining block, a groove is provided at the edge of the column and a backing metal is attached.

[0004] In order to perform high quality welding, it is necessary to properly manage the groove shape, the gap between members to be welded, and the like. Is required. In addition, in order to obtain a joining block or a pillar having an accurate length, it is also important to set the length of the square tubular member or the column including the projection size of the backing metal to an accurate dimension. Therefore, a device that defines the position of the backing metal attached to both ends of such a column is disclosed in
65438.

This conventional apparatus comprises two stoppers which are provided at the same distance from the center of the base and are opposed to and separated from each other, and the amount of movement of the two stoppers is equal to the direction of approaching or separating from each other. And an opening / closing drive device for moving the device. This open / close drive device is composed of a threaded rod with right and left threads of the same lead and a rack that meshes up and down with one pinion. The right and left threads of the threaded rod are used as left and right stoppers. By screwing, 2
By connecting each of the racks to the left and right stoppers, the left and right stoppers are approached and separated by the same amount of movement.

In the apparatus having the above structure, the column is first placed on the base so that its longitudinal center is located at the center of the base, and the stoppers on both sides are moved in the approaching direction to clamp both ends of the column. The center of the base to the center of the base. Next, the stoppers on both sides are moved in the separating direction by a predetermined distance (this distance becomes the amount of protrusion of the backing metal), and the backing metal is attached to both ends of the column while being positioned by the surface of the stopper. In this way, the backing metal attached to both ends of the column has the same protrusion size from the welding side, and the column including the amount of backing metal protrusion depends on the distance between the stoppers when positioning the backing metal. Can manage the length of When the blind flange is attached to the square tubular member of the column, the backing metal is positioned in the same manner as described above.

[0007]

However, in the above device,
When the longitudinal center of the column placed on the base is out of alignment with the center of the base, the column is forcibly moved to the center of the base when the column is first sandwiched. Therefore, the resistance required to move the heavy column on the base acts on the opening and closing device of the stopper, and a large force is required for driving the stopper. Further, when it is desired to define one protrusion size of the backing metal attached to both ends irrespective of the protrusion size of the other backing metal, the conventional device cannot perform positioning of the backing metal.

In view of the above, the present invention is directed to a position of a backing metal with a welding side of a welding member placed at a position deviated from the center of the base even when the welding member such as a column is deviated from the center of the base. It is also possible to set the protrusion dimensions of the backing metal at both ends to the same size, and to set one to the desired size independently of the other, and furthermore, to weld to both ends of the welding member. It is an object of the present invention to obtain a welding backing metal positioning device capable of positioning a flange material or the like.

[0009]

According to the present invention, there is provided a pedestal 5 provided on a base 5 so as to be linearly movable in a direction approaching and separating from each other.
(Left and right) stoppers 26, 26, and stoppers 26, 2
6, two screw rods 11, 12 of the same lead, one of which is a right-hand thread and the other is a left-hand thread, and a differential device 14 for connecting the two screw rods 11, 12, which are arranged in parallel to the movement direction of This problem has been solved by providing a positioning device for the welding backing metal, which is provided with the differential lock device 15.

[0010]

When the operating shaft 16 is rotated, the rotation is transmitted to the screw rod via the differential device 14. When the two (left and right) stoppers 26, 26 are moved in a direction approaching each other, even if the welding member is placed at a position deviated on the base,
When one of the stoppers comes into contact with the welding member, the rotation of the screw rod on that side stops and the rotation of the screw rod on the other side continues, and only the stopper on the non-contacting side moves to remove the welding member. Pinch. Therefore, even if the welding member is placed at a deviated position on the base, the two (left and right) stoppers 26, 26 hold both ends of the welding member without moving the welding member on the base.

When it is desired to make the protrusions of the backing metal at both ends the same, at the stage where the two stoppers hold the welding member,
The differential is locked, and the operating shaft 16 is rotated in the opposite direction. When the differential is locked, the two threaded rods rotate at the same speed, causing the two stoppers to move back an equal distance. Therefore, if the backing metal is attached by positioning with both stoppers retreated to a desired distance, the size of the attached backing metal from the welding member becomes the same.

When it is desired to define the protrusion of one backing metal independently of the other side, after clamping both ends of the welding member, a resistance is given to the movement of the stopper on the other side and a differential gear is provided. The operation shaft 16 is rotated in a direction in which the stoppers 26 are separated from each other without locking. When the one stopper retreats by a desired amount, the movement of the stopper is fixed, the resistance of the other stopper is released, and the operation shaft 16 is further rotated in the direction in which the stopper is separated to move the other stopper. The distance between both stoppers is set to a desired size. In this state, if the position of the backing metal is defined by each stopper and the backing metal is attached, the protrusion amount of one backing metal is defined to a desired size, and the welding member including the protrusion size of the backing metal is defined. The backing metal can be attached in a state where the length is set to a desired size.

[0013]

Embodiments of the present invention will be described below with reference to embodiments shown in the drawings. The jig for positioning the backing metal according to the illustrated embodiment is for manufacturing a joint block 1 for a steel building as shown in FIG. The temporary welding of the flange 4 is performed. FIG. 1 is a plan view of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a side view thereof, and FIG. 4 is a sectional plan view of a differential gear.

The base 5 of the apparatus is provided with parallel guides 6 extending left and right on the near side (operator side) and the back side. Two vise stands 7 and two ( Left and right) stopper bases 8 are provided movably. The vise table 7 is provided with a fixed claw 9 on the near side and a movable claw 10 on the back side, and the movable claw 10 is moved back and forth by a handle (not shown) to grip the square tubular material 2. The vise table 7 is provided with pins that engage with pin holes at predetermined intervals provided on the base side to fix the movement of the vise table. In a state where the interval between the bases 7 is set and the movement of the vise base 7 is fixed by the pins, the two vise bases 7 are fixed.
The square tube member 2 is fixed with.

Along the guide 6 on the near side, threaded rods 11 and 12 threaded in opposite directions are arranged on the left and right on the same axis, and an operation handle 13 is provided at the center of the base 5 on the near side. Is provided. The operation handle 13 and the left and right screw rods 11 and 12 are connected via a differential device 14. Stopper bases 8 provided on both sides of the base are screwed into screw rods 11 and 12, respectively.

FIG. 4 shows the structure of the differential device 14 and the differential lock device 15 incorporated therein. A small-diameter bevel gear 17 is fixed to an operation shaft 16 of the operation handle 13, and a rotary frame 19 is fixed to a large-diameter bevel gear 18 that meshes with the bevel gear. The base ends of the left and right screw rods 11 and 12 are
The driven bevel gear 20 is fixed to an end of the driven bevel gear 20. The two driven bevel gears 20 at the base ends of the left and right screw rods are in a positional relationship facing each other, and are connected to a rotating frame 19 so as to be freely rotatable around an axis orthogonal to the screw rods 11 and 12. A bevel gear 21 meshes with two driven bevel gears 20.

When the operating handle 13 is rotated, the large-diameter bevel gear 18 rotates, and the rotating frame 19 rotates. When the right and left screw rods 11 and 12 rotate at the same speed, the rotating frame 19 rotates at the same speed as both the screw rods 11 and 12, and the connecting bevel gear 21 does not rotate. When a speed difference occurs between the left and right screw rods 11, 12, the rotating frame 19 rotates at an intermediate speed between the left and right screw rods.

A friction clutch 15 serving as a differential lock device is provided on the proximal end side of one of the screw rods 12. A friction plate 23 of the friction clutch is mounted on the screw rod 12 so as to be relatively non-rotatable and slightly movable in the axial direction. A friction pad 24 is fixed to the rotating frame 19. Friction plate 23
Is fixed to the base 5 via a housing (not shown).

When the electromagnet 25 urges the friction plate 23 to press against the friction pad 24, the relative rotation between the screw rod 12 and the rotary frame 19 is fixed, and the screw rod 12 and the rotary frame 19 are rotated at the same speed. It rotates, so the screw rod on the other side also rotates at the same speed. When the friction plate 23 is separated from the friction pad 24, the screw rod 12 and the rotary frame 19 can rotate with a free rotation difference, and thus the left and right screw rods 11 and 12 can rotate with a free rotation difference.

The stopper base 8 has a stopper 26 having a shape in which two U-shapes are opposed to each other when viewed from the side of the apparatus.
Is provided. The entire U-shaped member on the back side can be moved and fixed on the stopper base 8 in the front-rear direction. The horizontal member 26a above the front and rear U-shaped members can be moved up and down and fixed along the vertical member 26b. By moving these, a frame-shaped stopper 2 formed in two opposite U-shapes
6 can be adjusted to a size according to the cross-sectional shape of the rectangular tube material.

Inside the stopper 26 (on the side of the vise table),
A narrow roller conveyor 27 parallel to the lower side of the stopper is provided so as to ascend and descend and the ascending and descending position can be fixed, and further, a butting member 28 capable of adjusting the position in the front-rear direction is provided at the front end of the vertical member 26b of the stopper. ing. The height of the roller conveyor 27 and the position of the abutting member 28 are set according to the dimensions of the blind flange 4 to be welded to the rectangular tube member 2. The stopper base 8 is provided with a movement lock device (a lock screw in the illustrated embodiment) 29 for fixing the movement of the stopper base in the left-right direction by pressing the tip against the base 5.

Next, an operation procedure for welding the backing metal 3 to the square tubular member 2 of the joining block illustrated in FIG. 5 and temporarily welding the blind flange 4 using the apparatus of the above embodiment will be described. Adjust the interval between the two vise tables 7 according to the length of the square tube material 2,
The position of the vise table 7 is fixed by the pins described above. In this state, the rectangular tubular member 2 is held between the fixed claw 9 and the movable claw 10. The stopper 26 has a size corresponding to the cross-sectional shape of the square tube material 2,
The operation handle 13 is moved in a direction in which the stoppers 26 approach each other.
To rotate. By releasing the differential lock device 15 at this time, both ends of the rectangular cylindrical member 2 can be sandwiched by both stoppers 26 even if the rectangular cylindrical member 2 is gripped at a position shifted from the center. At this time, the distance between the two (left and right) stoppers 26, 26 is measured by a length measuring device such as a linear scale (not shown), and the dimensions are displayed.

Next, the relative rotation between the rotary frame 19 and the screw rod 12 is fixed by operating the differential lock device 15,
The operation handle 13 is operated in a direction in which the left and right stoppers 6 are separated from each other so that the interval between the left and right stoppers 26 becomes a desired interval. In this state, a gap is generated between the left and right stoppers 26 and the ends of the rectangular tube material at equal intervals on the left and right. In this state, the backing metal 3 is positioned by the stopper 2 and welded. In this case, the right and left backing metal pieces 3 of the rectangular cylindrical member 2 are welded to the rectangular cylindrical member 2 in a state of protruding by an equal dimension.

When it is desired to change the amount of protrusion of the right and left backing metal pieces 3 from the state in which both ends of the rectangular cylindrical member 2 are clamped by the stopper, the differential locking device is operated and the end of the rectangular cylindrical member 2 is moved. The stopper base 8 is moved until the interval between the part and the stopper becomes a desired interval, and one of the stopper bases is fixed by the movement lock device 29, and then the differential lock device is released and the operation handle 1 is moved.
3 is adjusted so that the interval between both stoppers becomes a desired interval. With this configuration, the protrusion amount of one backing metal can be set to a predetermined desired size, and the entire length of the joining block can be set by the protrusion amount of the other backing metal.

After welding the backing metal as described above,
The stopper base 8 is further moved outward, and the roller conveyor 2 is moved.
The height of 7 and the position of the abutting member 28 are adjusted in accordance with the size of the blind flange 4, and the blind flange 4 is placed on the roller conveyor 27 and abuts against the abutting member 28. In this state, the stopper base 8 is moved in the approaching direction, and the blind flange 4 is brought into contact with the backing metal 3. At this time, the distance between the two stoppers can be measured with a linear scale or the like, so that the length of the joint block to be manufactured can be confirmed. In this state, the square tube member 2 and the blind flange 4 are temporarily welded, the temporarily welded member is removed from the apparatus, and the square tube member 2 and the blind flange 4 are fully welded by a welding robot or the like, so that a joining block having a desired size is obtained. Is obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a welding backing metal positioning device of the present invention.

FIG. 2 is a cross-sectional front view taken along the line AA of FIG. 1;

FIG. 3 is a cross-sectional side view of a portion BB in FIG. 1;

FIG. 4 is a cross-sectional plan view showing a differential device and a differential lock device.

FIG. 5 is a partially broken plan view showing an example of a joining block.

[Explanation of symbols]

 5 Base 11,12 Screw rod 14 Differential device 15 Differential lock device 26 Stopper

Claims (1)

[Claims] A stopper (26, 26) provided on the base (5) so as to be linearly movable in a direction approaching and separating from each other, and one of the stoppers (26, 26) arranged parallel to the moving direction of the stopper (26, 26). Two threaded rods (11,12) of the same lead with the right-hand thread and the other left-hand thread
And a differential (14) for connecting the two screw rods (11, 12).
And a differential locking device (15) therefor.