JPH072274B2 - Workpiece holding device for automatic welding equipment of welded structure beam - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work material pressing device in a device for automatically welding and forming a welded structural beam having an I-shaped or T-shaped cross section.

2. Description of the Related Art: A technique for welding a beam having an I-shaped cross-section by combining strip steel plates having required dimensions is already known.

In particular, regarding the technique for automatically welding a welded structure beam having an I-shaped cross-section or the like, the inventor of the present invention (Japanese Patent Laid-Open No. 1919/1986)
(See Japanese Patent No. 3781). When manufacturing a beam having an I-shaped cross section by welding, it is necessary to weld the flange member and the web material by welding the end surface of the web material to the flange member in close contact with each other. is there. For this reason, the flange member and the web material, which are continuously supplied, are pressed by a roller or the like in a close contact direction, and the joining points are continuously welded at a predetermined position. In the invention of the prior application, a method of pressing above the welding operation position with a pressure roller is proposed.

Problems to be Solved: In the above-mentioned prior art, a general I-shaped cross-section beam or the like is automatically welded, and therefore, a normal one, that is, a web in which the upper and lower sides of the beam are parallel to each other is smoothly processed. Welding work is now possible.

Also, since the emphasis is placed only on the close contact of the joints during welding, when continuously manufacturing long products, the thermal stress generated in the welded parts after the close contact is a local measure, It is inevitable that the flange member will not be dispersed and erased with cooling but locally generated to cause cracks at the welded portion, or the flange member will be warped and deformed with respect to the web material, and it is necessary to improve this.

However, for example, a beam A0 having a web A1 having a notch A5 portion used for a structure such as a bridge as shown in FIG. 10 or a beam A0 ′ having a slope has a normal web shape. When the beam is different from the one that is continuous and parallel at the upper and lower ends like the beam, in the prior art automatic welding device, the pressing roller cannot constantly press the web material, and the flange portion and the web material are continuously connected in a close state. It is difficult to weld properly. Therefore, in order to form a beam by welding such a specially-shaped web material to a flange material, there is no choice but to rely on manual welding, which requires low workability and inefficient work. It was

In the present invention, in order to solve such a problem, even if the upper end surface of the beam forming web material continuously fed to the welded portion has a discontinuous shape due to a notch, or it is inclined. Even if it is a surface, the joining end surface of the web material is brought into close contact with the flange material without any trouble so that the welding at the welded portion is maintained at a condition that does not cause positional displacement and the conditions under which heat welding can be performed almost evenly Another object of the present invention is to provide a pressing device for a processed material.

Means for Solving the Problems: In order to achieve the above-mentioned object, a work material pressing device in an automatic welding apparatus for a welded structure beam according to the present invention is arranged so as to face a receiving roller provided on a base. A work material pressing device for pinching a work material between and, (a) a movable frame that is moved up and down by a pressing mechanism, (b) a pressing force applying portion by the pressing mechanism at a lower portion of the movable frame. (C) At least two attached to the presser support along the transfer direction of the workpiece, the presser support being supported so as to be tiltable back and forth around the transfer direction of the work. It is characterized in that it is provided with a pressing element.

It is preferable that the pressing element has a main pressing roller having a support shaft in the pressing force applying portion, and two sub pressing rollers arranged before and after the main pressing roller.

Further, the pressing element may be composed of a large number of pressing pieces attached to an endless chain that is circulated and moved.

Further, in the present invention, as means for adjusting the tilt of the pusher support, a gear formed by meshing a gear piece attached to the pusher support with a gear on a support shaft supported by the movable frame. It is preferable to incorporate a meshing mechanism and a worm gear mechanism formed by meshing a worm gear attached to the support shaft and a worm on the operation shaft supported by the movable frame.

Action: In the work material pressing device of the present invention configured as described above,
When the welded part of the work material is sent to the welding operation point,
The web material with respect to the flange material is clamped by the lower receiving roller and the pressure element attached to the pressure element support to the extent that the web material is advanced to the predetermined position by the guide at the front position to be welded, and the web material is moved downward. The end face is sent closely. Even if this web material has a large number of notches on the upper side, at least two pressing elements can contact the end surface of the web material to apply a pressing force, so that the heat conducted to the base material by welding is applied. Propagates evenly in the vicinity of the joint, and the elongation of the base metal due to thermal expansion in the vicinity of the weld between the web material and the flange material becomes almost equal, and the molten part solidifies and stabilizes even after welding. The clamping force is kept urged in the section approaching the zone, and the thermal strain due to welding is extremely small, and automatic welding can be performed in a stable state regardless of the shape of the upper side of the web. . Then, the subsequent correction operation becomes simple. Of course, after welding the web material to one flange material, when welding the other flange material, even when pressing force is applied to the web material through the flange material, since it presses in a wide range, a stable close contact state is achieved. Welding operation can be performed while keeping.

Further, when the flange surface of the beam to be obtained is inclined, the pressing portion of the presser is caused to incline with the accompanying inclination of the long side of the web material, and it is made to follow by the pressing mechanism. It can be welded easily. When obtaining this inclined pressing surface, the worm gear mechanism and the gear meshing mechanism can be set to an arbitrary angle by external adjustment.

EFFECTS OF THE INVENTION According to the present invention, when an I-shaped beam or a T-shaped beam is manufactured with a welded structure, even if the web has a notch, it also has an inclined side. Even if the joint condition between the flange material and the web material is maintained in the required section before and after the welding operation, both base materials receive uniform heat and the pressing force is maintained until a safe state is achieved. It can be said that this is a useful invention that is useful for rationalization because a beam with a special shape, which is difficult to produce without work, can be automatically produced.

Example: Hereinafter, the present invention will be described with reference to the drawings with respect to an example.
It is as follows.

FIG. 1 is a schematic view of an automatic beam welding apparatus having a welding structure in which the workpiece pressing apparatus of the present invention is incorporated, and the welding apparatus 1 is located at the center. This welding device 1
A guide roller for guiding and supporting a long flat plate corresponding to a flange material and a plate of a web material in a predetermined cross section (or an inverted T-shaped cross section) and arc welding, and the web material. A mechanism for maintaining contact with the central position of the flange member is incorporated. Frame base 3 of this welding device 1
Is pivotally supported 4 on the lower surface of the substantially central portion thereof on the base 2 so as to be tiltable in the traveling direction of the workpiece, and between the lower surface of the base 3 and the base 2 on the outlet side of the processed object, A spring 4'for keeping the steady state is interposed.

At the upper part of the welding device 1, a pedestal 5 is laid on the base 2 by shifting the position of the column 5'to the rear so as not to hinder the tilting of the welding device 1 and the progress of the workpiece A. is there. On this pedestal 5, the means for supplying and collecting the flux to the welding operation section 7 and the welding machine 6 are distributed and mounted.
Roller conveyors 8 and 8'are provided on the supply side and the delivery side of the work material A, respectively.

As shown in FIGS. 2 to 6, the welding apparatus 1 includes a pair of base frames 11 and 11 arranged on the frame base 3 in parallel with the moving direction of the work material A at a required interval. Further, a main body frame 10 is erected on the base frames 11, 11 so that the workpiece A can pass through the inner and lower parts. The four columns 12 of the main body frame 10 are provided with vertical guide rails 13 on their inner sides opposite to each other. The front position in the moving direction of the work material A (second
A pressing roller support mechanism 21, which can be set to a required height by being guided by the pair of guide rails 13 respectively to the left side in the drawing and the rear side position (the right side in FIG. 2, which will be described hereinafter), 21 and this pressing roller support mechanism 21
Lifting frame 22 of pressurizing cylinder 26 mounted in the center
The pressing roller mechanism 40 and the work material guiding roller 51 are supported and disposed below the movable frame 30 by the movable frame 30 which is vertically moved by the (pressing mechanism). By the receiving roller 60 arranged facing each other, the work material pressing device 20 is constructed so that the work material A can be welded in a state in which the strain is minimally generated, and is incorporated.

A welding torch 15 as a welding means is arranged at an intermediate position between the above-mentioned work material pressing devices 20, 20 'so as to face a welding portion between a flange material and a web material of a moving work material A. Has been done.

Next, the presser device 20 (one of which will be described as a representative)
Each part of will be described.

The pressing roller support mechanism 21 includes guide rails 13 and 13 provided along the columns 12 and 12 of the main body frame 10 and a guide roller.
Mainly is an elevating frame 22 that is vertically guided by a group of 22 'without causing swinging in the front, rear, left, and right directions. Vertically supported by bearings 23 ', 23' provided on the upper and lower sides, and a pair of screw shafts 23, 23 disposed on both sides of the work material moving path vertically move the lifting frame with the lifting frame 22. 24 The internal threaded piece 24 'with a built-in screw can be moved to a desired position and supported. Power is transmitted from the motor mounted on the top of the main body frame 10 to the screw shafts 23, 23 so that they rotate in different directions in synchronization with each other via the gear boxes 25 ″, 25 ″ by the transmission shaft 25 ′. Connected to the drive unit 25.

The elevating frame 22 has a structure in which two parallel horizontal beam members are connected at both ends by connecting members 22 ″ to form a rectangular frame in a plan view. The guide rollers 22 ′ group described above each connect member 22 ″. ″, Each of which is attached to the guide rail 13 so as to come into contact with the guide rail 13 so that the guide can be performed in a state in which front, rear, left, and right shakes do not occur.

The pressurizing cylinder 26, in the central portion of the lifting frame 22,
A trunnion is supported by a pair of brackets 26 ″ extending between two cross beam members, and a piston rod 26 is projected downward.

The movable frame 30 has a structure similar to that of the elevating frame 22. A group of guide rollers 32 is attached to the supporting members 31 at both ends, and the movable frame 30 is vertically movable along the guide rails 13. Piston rod 2 of pressure cylinder 26
It is connected to the 6'tip. A pressure roller mechanism 40 is attached to the center of the lower surface of the movable frame 30 by a bracket 41.

In the pressure roller mechanism 40, as shown in FIGS. 4 to 6, a presser roller support arm 42 is rotated inside the bracket 41 through a support shaft 43 'of the main presser roller 43 at a predetermined angle. Sub-pressing rollers 44, 44 'are rotatably attached to the front and rear ends of the pressing roller supporting arm 42, respectively. The main pressing roller 43 and the auxiliary pressing rollers 44, 44 '
In both cases, a V-shaped groove is formed on the peripheral surface so that a pressing force can be applied while receiving and guiding the upper edge of the processed web material into the V-shaped groove, and the pressing force is applied to the upper surface of the flange material. It also has a flat peripheral surface for adding.

Further, the pressing roller support arm 42 includes a gear piece 46 for tilting operation provided on the upper surface of the base portion thereof, and a gear 46 'on a horizontal shaft 47' supported by bearings 47, 47 along the lower surface of the movable frame 30.
And the worm gear 48 attached to the end of the horizontal shaft 47 '.
And the worm on the operating shaft 49 incorporated in the movable frame 30.
By rotating a worm gear mechanism consisting of 48 'with a handle 49' at the end of the operating shaft 49, the positions of the auxiliary presser rollers 44, 44 'are vertically displaced with reference to the support shaft 43' within a required range. Thus, the pressing force of the pressure cylinder 26 can be applied to the work piece in a state where the guide portion is inclined in the moving direction of the work piece.

A pair of flange guide rollers are attached to the pressing roller support arm 42 so that they can be guided during welding of the flange material.

The receiving roller 60 provided on the upper side of the base plate 3 facing the pressure roller mechanism 40 is supported by bearings 61, 61 on its supporting shaft 42, and the supporting shaft 62 is required by a driving machine (not shown). It is designed to rotate at the speed of. In the drawing, on the upper side of the receiving roller 60, there is provided a work material guide mechanism 70 for sandwiching and guiding the web material and the flange member of the work material from both sides, and the guide roller position is the position of the welding torch 15. The screw shafts 71 and 71 supported by the frame base 3 and rotated by the operation of the handle 72 are adjusted from both sides so as not to hinder the arrangement.

A roller device 9 for correcting the processed material after welding is arranged at the front position of the main body frame 10 of the base 3.

Prior to the work, the work material pressing device 20 having the above-described structure first activates the drive unit motor of the pressing roller support mechanism 21 in accordance with the height dimension of the work material A to drive the screw shaft 2
3 and 23 are rotated, and the elevating frame 22 is moved up and down to a required height via the elevating / moving body 24 with a built-in female screw piece 24 'that is screwed into it. The moving position of the elevating frame 22 is determined by the pressure roller mechanism 40.
Adjust the height so that the upper edge (or the upper surface of the flange member) can be pressed.

This work material A is a web material A1 as shown in FIG.
When creating a beam A0 by welding what has a notch A5 on the upper surface of, prepare the flange material A2 and the web material A1,
When it is sent to the welding device 1 by the roller conveyor 8, first, the pressure cylinder 26 of the pressure roller support mechanism 21 of the pressing device 20 on the front side in the traveling direction is operated to cause each pressing roller of the pressing roller mechanism 40 to operate. 43, 44, 44 'are brought into contact with the upper surface of the processed web material A1. In accordance with this, the guide rollers 51, 51 are sandwiched so that the upper portion of the web material A1 to be processed is located at the center of movement. At this time, the lower portion of the workpiece flange material A2 is guided by the workpiece guide mechanism 70 so as to move at a predetermined position.

The web material A1 to be processed thus guided and held in the predetermined position is pressed by the pressurizing cylinder 26 to the pressing rollers 4
It is pressed by 3,44,44 'and the receiving roller 60 on the lower side thereof, and advances by the driving force transmitted to the receiving roller 60. The web material A1 has the notch A5 on the upper side as described above with respect to the flange material A2, but since the pressure roller mechanism 40 includes a plurality of pressing rollers 43, 44, 44 'in series. ,
As shown in FIG. 7, at least two pressing rollers can contact the upper end of the web material A1 to maintain the pressing force,
The tip portion is moved to the welding position by being closely contacted by the pressing force of the pressure roller mechanism 40 and is welded by the arc from the welding torch 15 by a known means.

After passing through this welding position, the rear pressure roller device 20 'that has been on standby is the same as the front pressure roller device 20,
The pressing roller 26 of the pressing roller mechanism 40 continuously applies a pressing force to the upper side of the web material A1 to be processed by the thrust force of the pressing cylinder 26, and the beam welded by the power transmission from the receiving roller 60 side while pinching. Advance the part. When the rear pressure roller device 20 'starts to operate, the front pressure roller device 20 causes the flange material A2 of the work material A and the web material to be processed.
The joint with A1 is kept in close contact. By doing so, the heat conducted to the base metal by welding is evenly propagated in the vicinity of the joint portion, and in the pre-welding portion, both are maintained in a substantially even heated state and proceed to the welding portion. . Further, after being welded, they are moved by receiving a pinching pressure while being gradually cooled.

Therefore, even if the flange material A2 and the web material A1 of the work material A have a shape in which the upper side of the web material A1 is interrupted by the notch A5, it is added after welding from the position immediately before welding. In the section up to the pressure position, it moves by being pinched in a nearly integrated state and gradually cooled, so that heat is evenly distributed and propagated around the joint, and the heat between the two members to be joined is increased. The difference in expansion does not occur, and the occurrence of thermal strain is significantly reduced. Therefore, the residual strain is lightly corrected by the correction roller device 9 at a position away from the pinching position of the pressure roller device 20 'on the rear side, and a product (or a semi-finished product) without bending is finished and the product on the delivery side is finished. Transfer to the roller conveyor 8 '. Of course, since strain due to thermal stress does not remain, cracking does not occur at the welded portion. Since the front and rear work material pressing roller devices 20 and 20 ″ are provided independently, the pressing force by the pressing roller group is individually set according to the welding operation of the work material A and the subsequent situation. , It should be in an optimum state.

The above has described the case where the web material A1 has the notch A5. For example, as shown in FIG.
In the case where the whole is inclined, the pressure roller mechanism 40 in the work material pressing device 20, 20 'is tilted according to the gradient of the beam to be used. In order to displace the positions of the pressing rollers 43, 44, 44 'of the pressure roller mechanism 40, the operating shaft 49 attached to the movable frame 30 is rotated by the turning operation of the handle 49', and the operating shaft 49 is rotated. By meshing the upper worm 48 'and the worm gear 48, a gear 46' on a horizontal shaft 47 'to which the worm gear 48 is attached. It can be tilted to the required angle with reference to ′.

In this way, both front and rear work material retainer worms 20,20 '
Means that the sub-pressing rollers 44 and 44 'are displaced to a required angle so that the web material or the flange material to be processed comes into contact with the tangent line of the two presser rollers 44 and 44', and thereafter the material to be processed moves. As shown in FIG. 8, the pressure roller support mechanism 21 is gradually raised or lowered by applying the pressing force by the pressure cylinder 26 by operating the elevating and lowering drive section 25 thereof. Welding work can be performed by applying a pressing force to the web or the flange in an inclined state. Similarly, even if the web material A1 is inclined at the upper end and has the notch A5, the pressure roller mechanism 40 is used as described above.
It is possible to tilt and press.

Further, in the present invention, instead of the pressure roller mechanism 40 composed of a plurality of pressing rollers described above, as shown in the schematic view in FIG. 9, it is wound around a chain wheel 55, 56, 55. Pressurization mechanism 4 in which a large number of pressing pieces 58 are attached to an endless chain 57 that circulates and moves.
It is also possible to adopt 0 '. In this type, each pressing piece 58 is provided with a V-shaped groove like the pressing rollers 43, 44, 44 'so that the upper end of the web A1 can be received and guided and supported. In the system thus formed, small rollers may be chained by chains instead of the pressing pieces 58.

[Brief description of drawings]

FIG. 1 is a schematic view of an automatic welding device for a welded structure beam equipped with the device of the present invention, FIG. 2 is a partially longitudinal front view of a main part of the device of the present invention, and FIG. 3 is a view taken along line III-III of FIG. 4 and 5 are vertical cross-sectional views of the main part of the pressure roller mechanism, and FIG. 5 is VV of FIG.
FIG. 6 is a plan view of the main part of FIG. 4, FIG. 6 and FIG.
FIG. 9 is a diagram showing an operation mode, FIG. 9 is another example diagram of the pressurizing mechanism,
FIG. 10 is a diagram showing an example of a beam having a peculiar shape to be handled. 1 ... Welding device, 2 ... Base 3 ... Base, 8,8 '... Roller conveyor 10 ... Main body frame, 11 ... Base frame 12 ... Struts, 13 ... Guide rail 14 ... Upper side Connecting member, 14 '…… Lower lateral connecting member 15 …… Welding torch 20 …… Front side work material pressing device 20 ′ …… Rear side work material pressing device 21 …… Pressing roller support mechanism, 22 …… Up and down Frame 22 ′, 32 …… Guide roller, 23 …… Screw shaft 24 …… Elevating moving body, 25 …… Driving unit 26 …… Pressure cylinder, 26 ′ …… Piston rod 30 …… Movable frame, 31 …… Supporting member 33 …… Central mounting piece, 34, 41 …… Bracket 40 …… Pressure roller mechanism, 40 ′ …… Pressure mechanism 42 …… Presser roller support arm 43 …… Main presser roller, 43 ′ …… Support shaft 44 , 44 '…… Secondary presser roller, 46 …… Gear piece 46 ′ …… Gear, 47 …… Bearing 47 ′ …… Horizontal axis, 48 …… Worm gear 48 ′ …… Ohm, 49 …… Operation axis 51 …… Guide roller, 55,56 …… Chain wheel 57 …… Chain, 58 …… Pressing piece 60 …… Receiving roller, 61 …… Bearing 62 …… Supporting shaft 70 …… Covered Work material guide mechanism, A ... Work material A1 ... Web material, A2 ... Flange material A5 ... Notch

Claims (4)

[Claims] 1. A work material pressing device which is arranged to face a receiving roller provided on a base plate and clamps a work material between the receiving roller and the receiving roller. (A) Movable vertically by a pressing mechanism. A frame, (b) a lower part of the movable frame, and a pusher support body that is tiltably adjustable forward and backward in the transport direction of the workpiece around the pressing force applying portion by the pressing mechanism; A workpiece pressing device in an automatic welding apparatus for a welded structure beam, comprising: at least two pressing elements attached to a child support along the transfer direction of the workpiece. 2. The pressing member has a main pressing roller having a support shaft in the pressing force applying portion, and two sub pressing rollers arranged before and after the main pressing roller. Workpiece holding device in the automatic welding device for welded structure beam according to 1. 3. The work material pressing device in the automatic welding device for a welded structure beam according to claim 1, wherein the pressing element is a large number of pressing pieces attached to an endless chain that is circulated and moved. 4. A gear meshing mechanism as a means for adjusting the tilt of the pusher support body by meshing a gear piece attached to the pusher support body and a gear on a support shaft supported by the movable frame. 5. The welding according to claim 1, 2 or 3, wherein a worm gear mechanism formed by meshing a worm gear attached to the support shaft with a worm on an operation shaft supported by the movable frame is incorporated. Workpiece holding device for automatic welding equipment for structural beams.