JPS62158567A - Automatic welding and finishing equipment - Google Patents

Abstract

PURPOSE:To realize a full automation of welding by constituting the titled equipment so that a cutting device provided with a guide roller runs on the side of a bead and cuts the bead, while an arc welding torch with a sensor for detecting a start end and a final end of a weld zone is executing the welding. CONSTITUTION:A base material D is slid onto a received ball of a temporary receiving mechanism 14 and an interval of base frames 10, 11 is positioned automatically by a computer, and the base frames 10, 11 are made to approach each other. Subsequently, a positioning arm 15 is made to descend, a rolling reduction material 13a is made to descend and the base material D is clamped, and welding and cutting finish are executed automatically. As for a cutting device 3, its front end guide roller 5 collides against a base metal at the side of a welding bead, and runs on the tread of the roller 5 and the step difference of the base metal surface. This step difference is made larger than the maximum indentation error and distortion of a weld zone. By a sensor 2, the start and end of welding can be executed automatically. In this way, even if the whole welding length is welded and finished automatically, no distortion is generated, and all can be executed efficiently by a full automation.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for measuring and finishing non-conforming welds.

(Binmai technology) Conventionally, multiple objects to be welded were welded at their respective 1a joints (1-
If the welding cannot be lined up in a row and there is a gap in the middle of the welding edge, or if the welding is interrupted in the middle of a single welding object, normal automatic When running a welding machine, it is common for the operator to weld intermittently. Even if a sensor is attached to replace the worker, finishing the weld bead is a separate process.

In a factory where the front and back panels of a door are butt-welded on both sides, in order to avoid distortion caused by welding, workers use semi-automatic arc welding machines to do spot welding at intervals of approximately 1 ocIn, and use a sander (hand-held grinding machine) to avoid distortion caused by welding. The parts that will not be welded are coated with putty, and then the entire surface is painted.

(Problems to be Solved by the Invention) In order to perform automatic welding and bead removal all at once, there are problems with the welding part detection means attached to the arc welding torch, and the problems with the finished surface detection and adjustment means attached to the bead grinding device. If the former detects the presence or absence of a welded part, even if the welded part is slightly shifted vertically and horizontally, it can be welded without any problems due to the principle of arc ablation. However, in order to remove only the weld bead and create a flat surface without scraping the surface of the base material as much as possible, the position of the grinder must be precisely controlled. Especially m
Welds on thin plate products such as doors are not only discontinuous, but also have double images at the same weld edge, a step with the next f4 tangent, thermal distortion during welding, and further damage to the thin plate base material. The difficulty is that the strength must not be lowered.

This invention has solved the above-mentioned difficult problems with the simplest configuration.

(Means for Solving the Problems) This invention provides: (1) When the sensor immediately before the automatic arc welding machine torch detects the start of the weld, the energized welding wire is raised, and the end of the weld is detected; A welding intermittent device that stops the feeding, and a guide roller that rests on the side of the weld bead, are installed in front and behind the rotary blade for cutting the weld bead, which is located behind the torch, and the treads of both rollers and the rotary blade are cut. The cutting device that matches the surface and the sliding surface of the cutting device push out toward the welding part, and the Ail side guide roller is in a standby position where it can ride on the side of the carpet part. The cutting device support and pressurizing mechanism can be supplemented by the support of the cutting device and the pressurizing mechanism, the height difference between the above-mentioned standby position and the finished surface of the welded part can be made large for the maximum dent error and distortion of the entire bath scissors, and the above-mentioned front roller can increase the above-mentioned yield without delay. Automatic welding and finishing equipment featuring an outer diameter that allows it to be run over. (2) Automatic - 14 joints, finishing - in which front and back plates made of metal are continuously butt welded on both side edges and finished, with left and right underframes that can be adjusted at intervals Bj@ according to the width of the door, and these underframes. The temporarily welded door material is laid horizontally between the frames, and the entire length of the left and right side edges is clamped from above and below. Clamping devices are installed on each of the above frames, and the inside of each of the above clamping devices can be raised and lowered.
The door material temporary ice receiving structure installed here, a pair of door material positioning arms with valleys also installed on the outside so that they can be raised and lowered, a running platform that runs on the outside of each of the left and right clamping devices to the above-mentioned material side edges, and the On the valley traveling table, there is a moving arc melting torch directed toward the side edge weld, a weld bead cutting device, and a weld bead cutting device. The device assembles the front and rear guide rollers that run up and down beside the side edge welded part with the rotary cutter, aligns the tread surfaces of both rollers with the cutting surface of the rotary cutter, and uses a support and pressure mechanism to facilitate the above-mentioned run-up. This automatic welding and finishing device is characterized by being held in a standby position.

(Function) In this invention, a cutting device is attached to the rear of an arc welding torch equipped with a sensor for detecting the starting end and ending end of the mk part, and while the welding torch welds discontinuous welding parts one after another, a cutting device is attached to the front and back of the rotary cutter. Ideally, a cutting device equipped with a guide roller rides the guide p-ra on the side of the welded bead, so that the cutting surface of the rotary blade always matches the surface of the base material beside the bead, which is the tread surface of the guide roller. Perform target speed finishing.

In addition, this invention is a concrete measure of the idea that the rotary cutter is integrated with the front and rear guide rollers and rides on the side of the bead every time it reaches the welding part. Park the cod in the waiting position with some extra extrusion, and make the step between the finished surface and the standby position large enough to accommodate the maximum dent error and strain of all welded parts, and set the outside diameter so that the step can be climbed without delay. He demonstrated the know-how of using a guide leeler.

In addition, the above invention is applied to a device that can finish the front and back plates of metal doors by continuous butt welding on both sides of the door, and can be applied to door materials with groove dimensions, and the entire length of both sides of the material is compressed to prevent welding deformation. The clamping device is equipped with a temporary leaf holding mechanism, a positioning arm, a welding torch, and a traveling mechanism for the cutting device, so the device is well organized and can handle everything from material attachment to welding, finishing, and more.
We presented a device that efficiently handles everything from chicken to sushi.

(Example) Fig. 1 shows an example of the device of the present invention, in which l is a welding torch, c is a sensor for detecting a welded part installed just before the welding torch, 3 is a cutting device, and end milk is placed on the tool rest 6. It's the front and rear guide rollers.

It is rated 5α. As shown in FIG. 5, the tool rest 6 with the cutting device ltJ attached is placed on the sliding surface of the traveling platform and is pushed out by a fluid pressure cylinder to a standby position 11 for cutting, or the tool rest 6 is placed on the sliding surface of the traveling platform and is pushed out to a standby position 11 for cutting, or the tool rest 6 is placed on the sliding surface of the traveling platform as shown in FIG. It is retreated to a place where it does not get in the way when putting it in and taking it out. Front guide roller! When the tool rests on the side of the weld, the tool rest 6 is pushed back by the height difference.

FIG. 2 shows a state in which the apparatus shown in FIG. 1 has started welding the starting end of the welding part of the workpiece to be welded. The cutting device 3 has not yet climbed onto the workpiece A, but as it advances a little further, the lower part of the front guide roller 3 touches the end of the base material beside the weld bead B, and the cutting surface toe 9
It runs over the difference in level between the treads of the guide rollers 3 and 5α and the surface of the base material beside the bead. This step must be such that both the maximum indentation error and strain υ over the entire length of the welded part are somewhat large, so that there is no place that cannot be cut. Unlike war machine products, welded parts of welded products have large manufacturing errors and installation errors, and there is also a large possibility of welding distortion, so the above-mentioned step difference can be as much as 3 to 5 meters.

When this step is large, if you try to climb onto it using a small guide roller, the reaction force that increases the friction between the tool rest 6 and the sliding surface on the running platform 7 side, which are integrated with it, is large, so you will not be able to climb onto it and will be unable to run. Either the vehicle stalls or the reaction force causes the vehicle to stop and then ride over the vehicle, resulting in defective welds. Therefore, the designer calculates the height difference of the weld line over the entire length of the discontinuous weld, predicts the strain, and designs the standby position of the cutting device 1.7 and the step between the finished surfaces to be even larger than this. However, when climbing over that step, the important trick is to use a guide roller S with a large diameter that hardly affects the speed of the welding torch L.

Next, an embodiment in which the present invention is applied to welding a metal door will be described with reference to FIGS. 3 to 6. D, indicated by a square line in Figure 3, is a metal door material, which is finished by continuous butt welding of front and back steel plates on both sides of the door. The material was prepared by hand in advance, and the front and back plates were temporarily attached.

The main parts of this embodiment are as follows: left and right underframes that can be adjusted in interval according to the width of the line (in this example, only the underframe // moves on the rails); The door cable material Df is laid horizontally between the frame io and //, and the entire length of the left and right side edges is clamped from above and below. Female material temporary receiving mechanism attached to /l, /lI,
A pair of valley door material positioning arms also installed on the outside so that they can be raised and lowered / & , /! , the above left and right clamp device/3
, /3 Running platforms 7, 7 run over the side edges of the blanks on the outside of each, and on each running platform 7, an automatic arc welding torch 11 and a bead cutting device 3, etc., are directed toward the side edge welding part.

The clamping device 13 consists of a pedestal/Jb that receives the entire length of the side edge of the raw material from below, and a gate-shaped frame/Jets frame 10゜ll on which a hydraulic cylinder for vassal material (horizontal material)/3α is arranged, inside. They are lined up on the porch, and rails for running platforms are laid on the outside porch. In addition, a welding +fi/α with a wire reel is placed on the upper surface of the center of the frame/7c, allowing it to freely slide along the middle of the heavy conduit tube/7 up to the moving welding torch l (1)
Hook with pulley / hook, frame /, horizontal rail l installed on top of 7C? The running speed of the traveling platform 70 is not obstructed by the Hungit tube.

On the left side of Fig. 3, the material is slid onto the ball receiver of the temporary receiver mechanism/lI, and the positioning arm l! Stand up, frame 10,
// f shows the state in which they are brought close to each other, and the right side of the figure shows the temporary holding mechanism / da, the positioning arm / S lowered, the rolling material / 3α lowered (l! The full length of the I edge is clamped, and the end miller cuts it. Note that /A is an end mill drive motor, which in this example is started by a signal from the computer and is stopped when the rear guide roller falls off the wrinkled object A.

FIG. 5 shows an enlarged view of the traveling platform viewed from above. When the sensor rotates, a mechanism that activates a microswitch 21) for controlling welding wire delivery via a rod, an operation for retracting the tool rest 6, and a fluid pressure cylinder tα that is pushed to a standby position and applies cutting force are shown. ing.

FIG. 6 shows an enlarged view of the modified material temporary receiving mechanism inside the clamp device pedestal 3b and the positioning arm IS provided outside. The former is raised and lowered by rotating the rotary levers 21 attached to both ends of the entire length υ by the fluid pressure cylinder za b, and the latter is raised and lowered by rotating the rotary levers 21 at both ends of the entire length 6D and the fluid pressure cylinder r at two intermediate positions of the pedestal 7.76.
The upper part is rotated by e and the upper part is lowered by 9. Both mechanisms significantly simplified welding preparation work.

In addition, this example device uses a computer to automatically position the distance between the left and right underframes in accordance with the steel layer material of each building size.
If you slide the material onto the ball of the temporary holding mechanism/lI,
Positioning, clamping, welding, and cutting are performed fully automatically, and welding automatically stops and restarts at the recess on the side edge of the door for attaching the handle, and when it passes the end of the weld, welding and cutting stop. , the torch, and the cutting device retract and return to the starting position. Instead of returning the heat, the direction of the torch and cutting device may be changed to weld and cut the next material in the opposite direction.

Experimental results using this example device showed that it took only 3 to 4 minutes to perform welding, which can cause welding deformation during full-length welding of thin plate products, compared to 20 minutes when conventional manual spot welding and sanding were performed. This was also prevented by using a complete full-length clamp, resulting in a full-length weld and a fully machined, high-quality weld and finish. In the case of conventional double doors with stepping stone welding, there is less welding, but it may be because the clamps can be removed quickly because of sanding.
However, this invention has shown that even if full-length welding is performed with complete restraint, no distortion occurs.

Workers do not have to bend over and inhale the dust from manual arc welding and sanding, and this eliminates the need for skill and increases fertility.

Even if it is limited to uniform welding and finishing equipment, it goes without saying that the actual form of this invention can be varied and applied in various ways depending on the well-known technology of the designer in charge. It is also easy to reverse the shape of the above embodiment in which the device side is moved.Although the rotary cutter is not limited to an end mill, it seems that the cutting edge of an ordinary cutter is likely to chip if it is exposed to welding spatter.

(Effects of the Invention) This invention completely welds the discontinuous parts that are not exactly aligned in a straight line by completely interrupting the arc, and during that time, the weld bead is flattened to match the surface of the base material on the side of the weld bead. We succeeded in completely automating a task that was thought to be possible only by hand, such as cutting into pieces.

A sensor is attached just before the welding torch to detect the starting edge of the welding area and control the feeding and stopping of the welding wire, so the wire hits the starting edge of the welding area and generates an arc, and the wire stops just before reaching the end, causing an arc. The length increases, filling the molten pool and completing the welding.

The cutting device uses a rotating blade instead of a conventional sander, so it can be installed in a narrow space, provides powerful and fast finishing, does not generate dust, and does not need to be able to adapt to changes in outer diameter like a grindstone. do not have. In particular, if an end mill is used, it can be used for a long period of time.

A rotary cutter is a tool used in a strong and highly precise device such as a milling machine, but in this invention, it is fixed to a tool rest together with front and rear guide rollers, and the tool rest is mounted on a traveling platform slide in the above-mentioned embodiment. It was shown that it is possible to securely fix the welded object by moving it forward and backward along the moving surface, even in an irregular manner as in this invention.

The treads of the front and rear guide rollers are fixed so that they match the cutting surface of the rotary blade, and the cutting force is used to push them to the waiting position, and the welding part is cut by riding on the side of the bead at the beginning of the welding part. Not only can the bead be reliably finished to the height of the base metal surface, but it can also adapt to changes in the welding area.

In addition, the metal door siding welding and finishing equipment that makes extensive use of this invention eliminates the conventional method of hiding flying stone welding with equipment, and does not cause distortion even when automatically welding and finishing the entire weld length. It has been demonstrated that everything from material charging, clamping, welding, finishing, and unclamping can be performed fully automatically with high efficiency.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of one embodiment of this invention, Fig. 2 is an explanatory diagram of the usage situation, and Fig. 3 is a steel layer side edge welding according to this invention.
FIG. 4 is a plan view of the finishing device, FIG. 5 is a plan view of the carriage, and FIG. 6 is an elevational view showing one side of the clamping device and its attached mechanism. l...torch, λ...sensor 3...cutting device, bower...end mill, 6...turret, 7...travel table, t...fluid pressure cylinder, io, ii.・Underframe,
lJ...clamp device, lII...door material temporary receiving mechanism, /j...position fm determining arm.

Claims (2)

[Claims] (1) A welding connection device that feeds out an energized welding wire when a sensor immediately before the torch of an automatic arc welding machine detects the starting edge of a welding zone, and stops feeding out when the end of the welding zone is detected; A cutting device in which a guide roller that rests on the side of the weld bead is integrally assembled at the front and back of a rotary blade for cutting the weld bead at the rear, and the tread surface of both rollers and the cutting surface of the rotary blade are aligned; The sliding surface is pushed toward the welding area, and the cutting device is supported and pressurized by a cutting device that is parked at a standby position where its front guide roller can ride on the side of the welding area. An automatic welding and finishing device characterized in that the level difference between the finished surface and the finished surface is larger than the maximum dent error and strain of all welded parts, and the front roller has an outer diameter that allows it to ride over the level difference without delay. (2) Continuous butt welding of the front and back plates of the metal door on both sides,
This is an automatic welding and finishing device that uses left and right underframes whose spacing can be adjusted according to the width of the door, and between these underframes, the temporarily welded door material is laid horizontally, and the entire length of the left and right side edges is sandwiched from above and below. a clamping device on each of the above-mentioned underframes, a door material temporary receiving mechanism mounted on the inside of each of the above-mentioned clamping devices so that it can be raised and lowered, a pair of door material positioning arms that are also mounted on the outside so that it can be raised and lowered; Each of the clamping devices is equipped with a traveling table running along the side edge of the material, and on each traveling table, an automatic arc welding machine torch and a weld bead cutting device directed toward the side edge welding part, and the welding torch is connected to the immediately preceding The cutting device has a welding intermittent device using a welding part sensor, and the cutting device has front and rear guide rollers that ride up and descend beside the side edge welded part and are assembled integrally with a rotary cutter, and connect the tread surfaces of both rollers and the cutting surface of the rotary cutter. An automatic welding and finishing device characterized in that it is aligned and held in the standby position where it can be easily climbed on by a support and pressure mechanism.