JPH02274315A - Compound device for bending and welding - Google Patents

Abstract

PURPOSE:To quickly and surely weld a work by providing a welding head to weld a weld zone of the work so that it can move to a bending frame. CONSTITUTION:The work W cut in a desired shape is supported on a bottom die 9 born on a lower frame 3 and pressed and fixed by a top die 25 through the fall of a vertically movable upper frame 5. The work W held by a top die 25 and a bottom die 9 is bent by a bending die 45 while a bending frame 49 is moved in a vertical direction. When the work W is held by the top die 25 and the bottom die 9, a welding head 67 provided on the lower frame 3 is moved as far as a weld zone of the work W is welded by the welding head 67. In this way, the work W is welded quickly, surely and precisely without carrying itself.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a folding and welding composite device that performs bending and welding on a workpiece.

(Prior Art) Conventionally, when processing a three-dimensional workpiece such as a box shape from a plate workpiece, the plate workpiece is first cut into the desired shape using a cutting device such as a punch press. Let's do it. The cut workpiece having a desired shape is transported to the next step, a bending device such as a press brake, and is bent to a desired bending line by a bending device I. Next, the workpiece that has been bent into the desired bending shape is transported to the next step, the welding part d, where a welding machine performs welding on the predetermined welding part of the workpiece, and the workpiece in the final product shape is completed. ing.

(Problem to be Solved by the Invention) By the way, in order to process a three-dimensional work such as a box shape from the conventional plate H work mentioned above, it is necessary to process the work using a cutting device, a bending device, and a welding device. The workpiece must be sequentially transported to the devices, and when processed by each processing device, the workpiece must be repositioned to a predetermined position. Therefore, there is a problem in that extra effort and time are required for transportation, repositioning, etc., until the final shape of the workpiece is completed.

In addition, when using a welding device to weld multiple welds on a workpiece that has been bent into the desired shape using a bending device, a special jig is used to accurately and reliably set each weld. The welding work was very troublesome and required skill.

Furthermore, the series of processes from conventional plate workpieces to box-shaped and other three-dimensional workpieces is suitable for large loft production, but is unsuitable for small-lot flexible production. there were.

The purpose of this invention is to improve the above-mentioned conventional problems by making it possible to reliably and accurately weld a welded part of a workpiece in a short time while the workpiece is bent into a desired shape. An object of the present invention is to provide a composite bending and welding device that eliminates wasted time during transportation and repositioning.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a lower frame in which a phototomer supporting the workpiece is supported, and a workpiece is pressed and fixed in opposition to the bottom die. A bending device comprising a vertically movable upper frame provided with a top die, and a vertically movable bending frame provided with a bending die for bending a workpiece held between a bottom die and a top die. A welding head for performing welding on a welded part of a workpiece is movably provided on the bending frame when the workpiece is held between at least a top die and a bottom die to constitute a composite bending and welding device.

(Function) By adopting the folding welding composite device of this invention,
The work cut into a desired shape is supported on a bottom die supported by a lower frame, and the upper frame, which can be moved up and down, is lowered to be pressed and fixed by the top die. The workpiece held between the top die and the bottom die is bent, for example, upwardly by the bending die by moving the bending frame in the vertical direction.

Then, while the workpiece is held between at least the top die and the bottom die, the welding head provided on the lower frame is moved to the welding part of the workpiece, and the welding head performs welding on the welding part of the workpiece. .

Therefore, welding can be performed reliably and accurately on a bent workpiece in a short time without transporting the workpiece.

(Example) Referring to FIGS. 1 and 2, the folding and welding composite device 1 according to the present example includes an upper frame 5 that is movable up and down above a fixed lower frame 3. It is something. More specifically, the lower frame 3 has a generally box-like shape, and a bottom die 9 is appropriately supported on the upper part of a vertical front plate 7 that constitutes a part of the lower frame 3. This bottom die 9 supports the workpiece W to be bent and is provided extending in the X-axis direction (left-right direction in FIG. 1).

As understood from FIG. 2, the upper frame 5 is
A plurality of arm plates 11 extending in the Y-axis direction (left-right direction in FIG. 2) are appropriately spaced apart in the X-axis direction. The front end of each arm plate 11 is
It is integrally fixed to the extended temporary holding plate 13 in the axial direction, and the lower rear end of each arm plate 11 is
It is integrally fixed to a connecting plate 15 extending in the axial direction.

In order to vertically moveably support the upper frame 5 relative to the lower frame 3, swing brackets 17 are provided at appropriate locations on the connecting plate 15 (in this embodiment, on both left and right sides and at the center). It is being This swing bracket 1
7 is swingably supported via a pivot 21 on a substantially clevis-shaped bearing bracket 19 that is erected on the upper part of the lower frame 3 .

In order to press and fix the workpiece W to be bent onto the bottom die 9, a top die 25 is provided below the temporary holding plate 13 of the upper frame 5 via a top die holder 23.

More specifically, as shown in FIG. 1, the top die 25 includes a plurality of selectable top dies 258 made of a thin plate, and a plurality of block die dies 25B located on both sides of the selection top die 258. It is constructed such that its length can be adjusted as appropriate in accordance with the width of the workpiece W.

Note that the configuration for adjusting the length of the top die 25 by selecting the number of the selection top dies 258 and the block-to-bottom dies 25B is not important in this embodiment, and a known mechanism may be adopted as necessary. Since it is also possible to do so, the details will be explained in detail.

With the above configuration, by vertically swinging the upper frame 5 about the pivot 21, the workpiece Wffi is clamped and fixed between the bottom die 9 and the top die 25, and the fixation is released.

In order to move the upper frame 5 up and down, the upper frame 5 is provided with a lifting device 27. More specifically, as shown in FIG. 2, support plates 29 are attached to the surfaces of the upper frame 5 opposite to the arm plates 71, and each support plate 29
A fluid pressure cylinder 31 as an example of a lifting actuating device f27 is arranged between them. A trunnion 33 is provided on each side of the hydraulic cylinder 31, and the trunnion 33 is supported by a bearing 35 attached to each support plate 29. However, each fluid pressure cylinder 31 is swingably supported by the upper frame 5.

A piston rod 37 protruding downward from the fluid pressure cylinder 31 is threadedly connected to the upper end of the branch 39 . The lower end of this support column 39 is pivotally supported via a piston 43 to a bearing 41 attached to the upper part of the lower frame 3.

With the above configuration, the upper frame 5 is swung in the vertical direction by appropriately operating the fluid pressure cylinder 31.

Therefore, by lowering the upper frame 5, the work W placed and positioned on the bottom die 9 is clamped and fixed to the bottom die 9 by the top die 25. Further, by raising the upper frame 5 by t, the clamping fixation of the workpiece W is released.

A bending die 45 is provided in order to bend the work W clamped and fixed by the bottom die 9 and the top die 25, for example, upward. More specifically, the bending die 45 is installed to extend in the X-axis direction to have approximately the same length as the bottom die 9, and the bending die 45 is extended in the X-axis direction to have approximately the same length as the bottom die 9. Bending type boulder 47 placed at the rear position of the top die 25
It is set in.

This bending die holder 47 extends in the X-axis direction, and the vicinity of both left and right ends and the vicinity of the center of this bending die holder 47 are supported by the front end of a bending die frame 49 that is swingable in the vertical direction. More specifically, as can be understood from FIG. The eccentric portion 5 of the eccentric shaft 51 is rotatably supported by the bearing bracket 19 at a height position.
1 is rotatably supported. Therefore, the bending die frame 49 can swing vertically about the eccentric portion 51E of the eccentric shaft 51.

The bending die frame 49 is provided with a bending drive device 53 in order to swing the bending die frame 49 in the vertical direction and bending the workpiece W by the bending die 45. More specifically, this bending drive device 53 is composed of a fluid pressure cylinder 55 in J3 in this embodiment.

The fluid pressure cylinder 55 is swingably supported by the bending frame 49 via a trunnion 57.

With the above configuration, the bending die frame 49 can be swung up and down by the operation of the fluid pressure cylinder 55. Therefore, the work W clamped and fixed between the C1 bottom die 9 and the top die 25 can be bent, for example, upward by the bending die 45.

For example, when the workpiece W is bent upward as described above,
In order to change the center of swing of the bending die frame 49 up and down depending on the plate thickness and the directionality of bending, the eccentric shaft 5
1 is provided. More specifically, as shown in FIG. 1, a motor 61 capable of forward and reverse rotation, such as a pulse motor or a servo motor, is mounted on one side of the upper frame 3. A deceleration device 63 that interlocks with this is installed. The output shaft of this reduction gear M63 is connected to the eccentric shaft 51.

Therefore, the rotation of the motor 61 is adjusted accordingly.
By doing so, the six eccentric shafts 51 are rotated appropriately. That is, by appropriately rotating the eccentric shaft 51, the center of the eccentric portion 51E of the eccentric shaft 51 is shifted in the vertical and horizontal directions in FIG. therefore,
The center of swing of the bending die frame 49 can be adjusted vertically and horizontally in FIG. 2 according to the thickness of the workpiece W and the bending direction. Furthermore, the bending frame 49 can be moved largely in the Y-axis direction.

Referring to FIGS. 1 and 3, a Rade oscillation power theft 165 is arranged at a distance on the left side of the composite bending and welding device 1.

Further, a laser processing head 67 as a welding head is movably provided on the bending mold holder 47. More specifically, as shown in FIGS. 3 and 4,
A support frame 69 extending in the X-axis direction is integrally provided on the front surface of the bending mold holder 47, and X-axis linear guides 71 extending in parallel in the X-axis direction are provided at the upper and lower portions of this support frame. It is being Also, the support frame 69 has an
An X-axis scoop 73 extending in the axial direction is provided.

As shown in FIG. 4, an x-axis binion 75 is meshed with this X-axis hook 73, and this X-axis binion 75 is connected to an It is attached to the output shaft of the attached X-axis motor 79.

With the above configuration, when the X-axis upper motor 79 is driven, the X-axis pinion 75 rotates via the output shaft. Since the X-axis binion 75 is meshed with the X-axis hook 73, the X-axis movable body 77 is guided by the X-axis linear guide 71 and moved in the X-axis direction. As shown in FIG. 3, a laser oscillator main body 81 is provided, and this laser oscillator 8
1 is connected to the laser oscillator 6 via a cable 783.
The laser beam cover 85 is connected to a laser beam cover 85 extending from the laser beam cover 85 in the X-axis direction.

As shown in FIG. 3, on the left side of the X-axis moving body 77, a first Z-axis cylindrical body 87 is attached facing downward, and an X-axis bend mirror 89 is attached to one end 87A of this first Z-axis cylindrical body 87. It's decorated.

Furthermore, a Y-axis rotary cylinder 91 is provided at the lower end of the first Z-axis cylinder 87.
are integrated. At one end of this Y-axis rotary cylinder 91,
A shaft pendor mirror 93 is installed inside.

With the above configuration, when the laser oscillation power theft wA65 is turned on, the laser beam cover 85. A laser beam is oscillated by the laser oscillator main body 81 via the capebear 83, and the X-axis bend mirror 89. The light is bent by the Y-axis pendor mirror 93 and irradiated rightward in the Y-axis direction in FIG.

As shown in FIG. 4, the Y-axis inner cylindrical body 91 has
A Y-axis motor 95 is attached, and this Y-axis motor 9
A Y-axis pinion 97 is fitted to the output shaft of No. 5. Further, a Y-axis radial moving body 99 that is movable in the Y-axis direction is provided in the Y-axis inner cylinder 91, and a Y-axis radial moving body 99 that extends in the Y-axis direction is provided on one side of the Y-axis radial moving body 99. A hook 101 is provided.

The Y-axis pinion 97 is engaged with this Y-axis dowel 101.

With the above configuration, when the Y-axis motor 95 is driven, the Y-axis pinion 97 is rotated via the output shaft. Since the Y-axis hook 101 is engaged with the Y-axis pinion 97, the Y-axis
When the shaft pinion 97 is rotated, the Y-axis radial moving body 99 is moved in the Y-axis direction within the Y-axis inner cylindrical body 91.

At one end of the Y-axis moving body 99 (the right end in FIG. 4), there is a G
, t A second Z-axis cylindrical body 103 extending upward in the Z-axis direction (in the vertical direction at J3 in FIG. 4) is attached. A Z-axis pendor mirror 105 is installed inside the lower end of the second Z-axis cylindrical body 103.

The second z-axis cylindrical body 103 is provided with a G, tZ@-E-Y 107, and a Z-axis pinion 109 is fitted to the output shaft of this seven-axis motor 107. In addition, the Z-axis inner cylindrical body 1
03 is provided with an axial moving body 111 extending in the Z-axis direction, and a Z-axis hook 113 extending in the Z-axis direction is provided on one side of the Z-axis radial moving body 111. .

With the above configuration, when the Z-axis motor 107 is driven, the Z-axis pinion 109 is rotated via the output shaft. Since the Z-axis hook 113 is engaged with the Z-axis pinion 109, the Z-axis radial body 111 is moved in the Z-axis direction with respect to the second Z-axis cylindrical body 103.

A laser processing head 67 as a welding head is provided at the tip of the Z-axis moving body 111.

More specifically, as shown in FIG. 4, FIG. 5, and FIG. The lower end of is attached. A motor base 117 is provided at the bottom of the six-wheel rotating body 115, and this motor base 11
7 is provided with an A-axis motor 119 such as a servo motor.

The output shaft of this A-axis motor 119 has a six-wheeled binion 121.
is attached, and a six-wheel gear 123 is meshed with this six-wheel pinion 121.

1. When the A-axis motor 119 is driven with the above configuration,
The six-wheeled binion 121 is rotated. Six-wheeled binion 121
Since the A-axis gear 123 is meshed with the A-axis gear 123, when the six-wheel binion 121 rotates, the six-wheel rotating body 115 is rotated in the A-axis direction via the six-wheel gear 123 as shown by the arrow in FIG. .

As shown in FIG. 6, a six-wheel fixed body 125 is provided inside the six-wheel rotating body 115, and the A-axis fixed body 12
A hollow cylindrical body 127 extending in the Z-axis direction is provided at the axis of 5. A B-axis rotating body 129 is provided at the top of this hollow cylindrical body 127.

A B-axis motor 131, such as a servo motor, is provided on the upper left side of the six-wheel rotating body 115 in FIG. 5, and an eight-axis pinion 133 is attached to the output shaft of this B-axis motor 131. On the other hand, the B-axis rotating body 129 has B
A shaft gear 135 is provided. The B-axis pinion 133 is meshed with this B-axis gear 135 . Also, B
An A-wheel pend mirror 137 is provided above the 1111 rotating body 129, as shown in FIG.

With the above configuration, when the B-axis motor 131 is driven, the B-axis motor 131 is driven.
The shaft pinion 133 is rotated. Since an eight-wheel gear 135 is meshed with the B-axis binion 133, when the B-axis binion 133 rotates, the B-axis rotating body 129 moves in the B-axis direction via the B-axis gear 135 as shown by the arrow in FIG. It will be rotated inward.

As shown in FIGS. 5 and 6, the B-axis rotating body 129 is provided with a C-axis collapsing body 139.
A nozzle 143 is attached to the upper part of the shaft moving body 139 via a nozzle holder 141. The C-axis moving body 139
has a built-in B-axis bend mirror 145. Also,
A condensing lens 147 is built into the nozzle holder 141.

A C-axis motor 149 such as a servo motor is provided at the bottom of the C-axis moving body 139.
A C-axis pinion 151 is attached to the output shaft of.

On the other hand, a C-axis hook 153 extending in the Z-axis direction is provided at the lower part of the B-axis rotating body 129, and the C-axis binion 151 is meshed with this C-axis hook 153. The C-axis moving body 139 is provided with a C-axis linear guide 155 as shown in FIG.

With the above configuration, when the C-axis motor 149 is driven, C
The shaft pinion 151 rotates. Since the C-shaft hook 153 is meshed with the C-shaft binion 151, when the C-shaft binion 151 rotates, the C-shaft hook 153 is engaged with the C-shaft hook 153.
The shaft moving body 139 is guided by the C-axis linear guide 155 and is moved in the C-axis direction as indicated by the small arrow in FIG.

For example, a capacitive gap sensor 157 is integrally attached to the lower part of the nozzle holder 141.

Therefore, when the C-axis moving body 139 is moved in the C-axis direction, the gap sensor 157 is also moved in the C-axis direction.

A C-axis motor main body 159 is attached to the C-axis motor 149, and a C-axis potentiometer 161 is also attached, and the gap amount when the gap is detected by the gap sensor 157 is determined by the C-axis potentiometer 1.
It will be detected at 61. Incidentally, since the rough specific details are already publicly known, their explanation will be omitted.

As shown in FIG. 5, a clearance is provided on the side surface of the C-axis motor 149 in order to detect the clearance between the welded parts of the workpiece W, the details of which will be described later, through a single-shaped bracket 163. A CCD camera 165 is installed as a sensor for CCD 7J camera 1.
Although not shown, a light source is provided near the CCD camera 165 when detecting the clearance of the welded portion of the workpiece W at step 65 .

With the above configuration, the nozzle 143 attached to the tip of the C-axis radial body 139 is moved in the X-, Y-, and Z-axis directions, rotated in the Am- and B-axis directions, and further moved in the C-axis direction. It happens.

Further, the laser beam B oscillated by the laser beam oscillator main body 81 is transmitted through an X-axis bend mirror 89 and a Y-axis bend mirror 93 . Z-axis pend mirror 105° 6-wheel pend mirror 1
37 and B-axis pend mirror 145, and is condensed by a condenser lens 147. The laser beam LB focused by the condensing lens 147 is irradiated from the nozzle 143 to the welding part of the workpiece W to perform laser welding by thermal melting.

In FIG. 4, the operation of bending the workpiece W with a bending die 45 and performing laser welding on the welding part WS of the workpiece W in a state in which it is in contact with the workpiece W or in a state in which it is separated from the workpiece W will be described. First, the workpiece W is placed on the bottom die 9, the top die 25 is lowered relative to the bottom die 9, the workpiece W is clamped, and the workpiece W is further bent, for example, upwardly by the bending die 45.

With the workpiece bent and the bending die 45 in contact with the workpiece W or placed from the workpiece W, the tip of the nozzle 143 is placed at the welding part (butt part) Ws of the workpiece W from the standby position, and the XI! II. Move it in the Y-axis and Z-axis directions to bring it closer. Furthermore, the tip of the nozzle 143 is rotated in the A-axis and B-axis directions to assume a position, for example, in the vertical direction with respect to the welded part WS of the workpiece W, and the nozzle 143 is moved in the C-axis direction so that the tip of the nozzle 143 is The gap between the workpiece W and the welded portion WS is detected by the gear sensor 157, and the workpiece W is positioned at a predetermined gap amount.

Next, the CCD camera 165 detects whether the clearance between the mutual glues W at the welded part WS of the workpiece W is within a predetermined range, and if this clearance is within a predetermined range, the nozzle 143 Welded part W from the tip
By irradiating S with a laser beam and B, and moving the nozzle 143 to the welding line, welding by predetermined thermal melting is performed.

In this way, the bending process is performed on the workpiece W by the bending and welding composite device 1, and the welding part Ws of the workpiece W is welded on the spot by thermal melting with the laser processing head 67 in a short time, reliably and accurately. be able to. Therefore, it is possible to weld the work W from the bending process to the welding process without transporting the workpiece W, and without using any special jig at the bent place, and moreover, production can be performed by flexible bending and welding.

Furthermore, the clearance between the welded parts WS of the work W during welding is constantly monitored by the CCD camera 165 as a clearance sensor, and welding is performed with an appropriate clearance, so that accurate welding is possible and welding defects are avoided. It becomes less.

Since the laser processing head 67 is movable so as not to interfere with the bending die 45, bending and welding of the workpiece W can be performed smoothly, and the laser processing head 67 can be moved from the bending die 45 side. Since it is movable, the laser beam beam 8 does not cause any trouble due to vibration during bending.

Note that this invention is not limited to the embodiments described above, but can be implemented in other forms by making appropriate changes. For example, in this embodiment, the bending die 45 is
The explanation was given using an example of bending the workpiece W upward using the
As shown in FIG. 7, the bending die 45 is placed in the bending die holder 4.
7, and the laser processing head 67 is provided at approximately the center of the bending mold holder 47 in the vertical direction, and is placed in the upper and lower bending molds 45 and bent upward and downward. It is also possible to do so.

Furthermore, although the laser processing head 67 is used as a welding head in this embodiment, it is also possible to perform laser cutting by changing the laser beam conditions for laser processing.
In this case, it is also possible to carry out light processing at the necessary locations in the bent state.

[Effects of the Invention] As can be understood from the above description of the embodiments, according to the present invention, since the structure is as described in the claims, it is possible to bend a workpiece with a bending machine. The welding head can be used to weld the welded part of the workpiece in a short time, reliably and accurately. Therefore, there is no need to transport the workpiece from the bending process to the welding process.
Also, there is no need to use a special jig during welding (it is possible to weld the workpiece when it is bent).

Since the welding head and the bending die are movable and retracted so as not to interfere with each other, bending or welding can be performed smoothly without causing any trouble.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of a composite bending and welding device according to the present invention, FIG. 2 is a sectional view taken along line I-n in FIG. 1, and FIG. 4 is an enlarged detailed view of the section seen by the arrow ■ in FIG. 2, FIG. 5 is an enlarged view of the section seen by the arrow V in FIG.
This figure is a partial sectional view of the Vl arrow in FIG. 5, and FIG. 7 is an explanatory diagram showing another embodiment in place of FIG. 4. 1...Bending and welding composite system■ 3...Lower frame 5
... Upper frame 9 ... Bottom die 13.
... Temporary holding plate 25 ... Top die 45 ...
・Bending mold 47...Bending mold holder 49...
・Bending frame ・67... Laser processing, ■Head (welding head) Representative Patent attorney Hidekazu Miyoshi Figure 2, page 6, page 7

Claims (1)

[Claims] A lower frame supports a bottom die that supports a workpiece, an upper frame that is vertically movable and is provided with a top die that presses and fixes the workpiece facing the bottom die, and the workpiece held between the top die and the bottom die is folded. A bending machine comprising a vertically movable bending frame provided with a bending die for bending, when a workpiece is held between at least a top die and a bottom die,
A composite bending and welding device, characterized in that a welding head for welding a welded portion of a workpiece is movably provided on the bending frame.