JP3305856B2 - Automatic welding equipment for automobile door panels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hinge panel and a sash for an inner panel constituting an automobile door panel.
The present invention relates to a welding device for automatically welding a beam.

[0002]

2. Description of the Related Art For example, a door panel of an automobile is composed of an inner panel and an outer panel. Sashes, reinforcing beams and the like are welded.

[0003] Hinge side and sash on the inner panel,
In order to weld beams and the like, hinge side (2), sash (3), and beam (4) are supplied in order while conveying the inner panel (1) on a belt conveyor as shown in FIG. 7 to perform spot welding. I was

That is, in the first step I, the inner panel (1) is supplied onto the jig (5), the hinge side (2) is supplied thereto, and the inner panel (1) is temporarily fixed by a spot welding machine (not shown). Hit. Next, the inner panel (1) is transferred to the belt conveyor (6).
The sash (3) is supplied to the inner panel (1) in the second step II, and the hinge side (2)
Additional welding and sash (3) welding were performed.
In Step III, the beam (4) is supplied, the beam (4) is provisionally beaten, and in the next fourth step IV, the inner panel (1) is erected and sent to the next step.

The supply of the hinge side (2), the sash (3), and the beam (4) in each step is performed manually by an operator while moving the inner panel (1) together with the transport.

[0006]

Since the inner panel (1) is transported by the belt conveyor (6), the transport speed is slow and the component mounting surface of the inner panel (1) is transported toward the upper surface. Since the parts to be welded are supplied after the inner panel (1) has been sent to each step, the workability is poor and the cycle time is very long.

Further, since the inner panel (1) is transported by the belt conveyor (6), the inner panel (1), the hinge side (2) to be welded, the sash (3), A clamp mechanism for holding the beam (4) and the like and a welding electrode cannot be installed, and these must be installed side by side above the belt conveyor (6). However, the installation space is small, and C-type guns and X-type guns are used for spot welding. These welding guns require a large and large work space, so that many spots can be welded at once. Instead, the welding of each component must be performed separately in a preliminary driving step and an additional driving step, and the number of steps has increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic welding apparatus in which the number of steps is reduced and work transfer is accelerated to improve workability.

[0009]

An automobile door according to the present invention.
In the first step , the automatic panel welding equipment
Weld the hinge side and sash to the inner panel of
An automobile welding a beam to the inner panel in the second step
In automatic welding device of the door panel, it is disposed in the first step
And a first click for holding the inner panel in a horizontal state.
Ramp means and support means for supporting the hinge side
And second clamping means for gripping the sash;
Side welding for welding the inner panel and hinge side
Machine and a sash for welding the inner panel and sash.
A first welding unit that includes a shoe welder, first step smell
Gripping the inner panel after welding
Clamp for transferring the inner panel to the second step
Means and the third clamping means in a first step and a second step.
And between the first and second steps.
A hand for reciprocating the third clamp means upward with
And in the second step, the third clamping means
To the loading position of the inner panel that is transported sideways.
A beam loader for supplying a beam, comprising:
A first support for supporting the tip, and a first support in a beam length direction.
The rear part of the beam is mounted so that it can move relative to the support.
A beam loader having a second support for supporting the beam;
1st beam welding machine located in front of the loading position of the
Welding at the rear of the contact position with the carry-in position of the inner panel
Move relative to the first beam welder in the beam length direction
A second beam welder operably disposed, wherein the
And a second welding means for welding the panel and the beam.
It is characterized by the following.

[0010] In the above configuration, the transport means moves the clamp means for gripping the inner panel by a double speed mechanism comprising a pair of racks and a pinion gear. In addition, the inner side disposed in a state of being laid down in the second step.
Erecting means for erecting the panel is provided.
Erect inner panel after welding beam
are doing.

The welding means comprises a plurality of lower electrodes and a stud gun, wherein the lower electrode is fixed at a welding position, and the stud gun is moved onto the lower electrode to perform welding. It has.

[0012]

In the automatic welding apparatus described above, the inner panel is transported over the sky, so that the lower part of the transport means is opened, the installation space and the working space are widened, and the clamp means and the welding machine for gripping the parts to be welded below the transport means. Can be provided, and the whole apparatus can be made compact.

Further, since the transfer means moves the clamp means for gripping the inner panel by the double speed mechanism, the transfer speed is increased, and the work efficiency is increased.

Further, if a stud gun is used for welding, multiple hit points can be welded at one time, the steps can be integrated, and workability is improved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 6 in which a hinge side, a sash, and a beam are mounted on an inner panel.

According to the present invention, as shown in FIGS. 1 and 2, the inner panel (1) is transported over the two steps by the transport means (A), and in the first step I, the first panel Welding means (B)
The hinge side (2) and the sash (3) are welded to the inner panel (1) by the second step II, and the second welding means (C)
Is used to weld the beam (4) to the inner panel (1).

As shown in FIGS. 2 and 3, the conveying means (A) has a guide rail (11) attached to the lower surface of a support frame (10) which is erected over two welding steps. A slide base (12) is slidably mounted on the rail (11) via a plurality of rolling rollers (13), and a clamp means (14) for holding the inner panel (1) on the slide base (12) is provided in two stages. It is provided to move up and down.

The feeding means (15) for sliding the slide base (12) includes a pair of racks (16a) (16).
b) and a double speed mechanism comprising a pinion gear (17), and an upper fixed rack (16a) is supported by a support frame (1).
0), and the lower movable rack (16b) is fixed to the slide base (12). And the support frame (1
The pinion gear (17) is pushed and pulled by the feed cylinder (20) attached to the pin (0). The pinion gear (17) moves while rotating by the expansion and contraction operation of the feed cylinder (20), feeds the movable rack (16b) at double speed, and quickly moves the slide base (12).

The clamp means (14) includes a plurality of clamp arms (21) for clamping the inner panel (1), and is vertically supported by a slide base (12) via a guide rod (22). 23)
It is supported to be able to move up and down via a guide rod (24). Then, the first lifting cylinder (25) mounted on the upper surface of the slide base (12) is used to lift the lifting frame (23).
Is lifted and lowered, and the clamping means (1) is moved by a second lifting cylinder (26) attached to the upper surface of the lifting frame (23).
4) is raised and lowered. The clamp means (14) moves up and down two steps in a combined operation of the first lifting cylinder (25) and the second lifting cylinder (26) in the first step I and the second step II. The first lifting cylinder (2
5) and the second lifting cylinder (26) use a cylinder with a brake that slides at high speed.

The first welding means (B) installed in the first step I is, as shown in FIG. 1 and FIG.
A first clamp means (30) for gripping the inner panel (1), a second clamp means (31) for gripping the sash (3), and a support means (not shown) for supporting the hinge side (2) are provided thereon. , A side welder (32) for welding the inner panel (1) and the hinge side (2), and a sash welder (not shown) for welding the inner panel (1) and the sash (3).

The side welding machine (32) is provided with a lower electrode (33).
And a stud gun (34), and a plurality of lower electrodes (33) are erected on an electrode mounting plate (35). Although not shown, all of the lower electrode (33) is attached to the electrode attachment plate (35) so that the inner panel (1) and the hinge side (2) correspond to all portions to be welded.
The electrode mounting plate (35) is moved up and down by the elevating cylinder (36) and rises during welding to press the lower electrode (33) against the hinge side (2). A guide rail (40) is installed in the front-rear direction on the upper surface of a gantry (37) installed as shown in FIG.
0), an electrode support arm (42) is attached via a linear slide (41), the tip of the electrode support arm (42) is extended to above the welding position, and a stud gun (3
4) are mounted in plural. Although not shown, all of the stud guns (34) are attached to the electrode support arm (42) in a predetermined number in the width direction. The electrode support arm (42) is a ball screw (4) whose rotation is controlled by a servomotor (43).
It is moved back and forth at 4), and is moved back and forth from the standby position in front of the carry-in position of the inner panel (1) to the welding position.
Then, at the welding position, the inner panel (1) is moved by the stud gun (34) and the lower electrode (33) while moving the electrode support arm (42) little by little to determine the position.
And the hinge side (2) are welded.

Further, the sash welding machine uses an eco-raising gun as in the prior art, and is disposed beside the carry-in position of the inner panel (1).

The second welding means (C) installed in the second step II is, as shown in FIGS. 5 and 6, a jig surface plate (45).
A beam loader (46) for supplying a beam (4) thereon and an erecting means (47) for erecting the welded inner panel (1), and a first beam for welding the inner panel (1) and the beam (4). A welding machine (50) and a second beam welding machine (51) are installed. Further, a clamp means (not shown) for holding the inner panel (1) is also provided at a predetermined position.

The beam loader (46) is provided with a jig platen (4).
5) A guide rail (52) is installed on the upper surface in the width direction intersecting the feed direction of the inner panel (1), and the loader body (54) is slid on the guide rail (52) via the linear slide (53). Freely attach, jig surface plate (45)
The loader main body (54) is slid between a standby position and a working position by a retraction cylinder (55) attached to the loader.

A first support (56) for supporting a front portion (4a) of the beam (4) is fixed to a front portion of the loader body (54), and a rear portion (4b) of the beam (4) is fixed to a rear portion. Is mounted as described later. Second
The support base (57) is provided with guide rails (60) on the loader main body (54) in the front-rear direction so as to correspond to three doors and five doors having different lengths. A slide table (62) is slidably provided on the upper side via a linear slide (61), and the slide table (62) is provided.
The second support (57) is mounted thereon. The slide table (62) is moved back and forth by a slide cylinder (63) attached to the loader body (54), and when supporting a short five-door beam, the slide cylinder (63) is shortened. When the second support base (57) is advanced to support the long three-door beam (4), the slide cylinder (63) is extended to operate the second support base (57).
Is retracted, and the first support (56) and the second support (5)
7) is adjusted to match the length of the beam.

A lift mechanism (not shown) for lifting the beam (4) is provided below the beam loading position of the jig base (45), and the first support (56) and the second support (57). )
When the beam (4) held by the lift mechanism is carried in, the beam receiving base (64) of the lift mechanism rises and is held by the first support base (56) and the second support base (57). The beam (4) is received and lifted to the welding position.

The erecting means (47) is provided on a support table (65) installed at a position higher than the beam loader (46) on the jig base (45) via a bracket (66) via a rotating shaft (67). Are rotatably supported, and an upright arm (70) is attached to the rotating shaft (67). The rotating shaft (67) is rotated by an upright cylinder (71) attached to the side surface of the support table (65) so as to swing freely. When the upright cylinder (71) extends, the upright arm (7) is rotated.
When 0) falls down and performs a shortening operation, the upright arm (70) stands up. An upright pin (72) is rotatably mounted on both sides of the upper end of the upright arm (70), and the upright pin (72) is raised and lowered by a pin cylinder (73) attached to the upright arm (70). . When the pin cylinder (73) extends, the erecting means (47) falls down from the line in which the beam (4) is carried in when the pin cylinder (73) extends, and the pin cylinder (73) shortens. As a result, the upright pin (72) rises and hits the inner panel (1). Next, the upright cylinder (71)
Makes the upright arm (70) erect and the inner panel (1) erects.

A first beam welding machine (50) for welding the inner panel (1) and the tip of the beam (4) uses a pincha gun, and a guide rail (75) and a linear guide are mounted on a slide table (74). Gun table (77) slidably supported in the width direction via a slide (76)
The gun table (77) is moved in the width direction by a ball screw (80) provided on the slide table (74). The ball screw (80) is a servo motor (8
The rotation is controlled in 1). Also slide table (74)
In order to avoid interference between the inner panel (1) carried in from above and the first beam welding machine (50), the jig platen (4)
Guide rails (8) on a gantry (82) attached to 5).
3) and is slidably supported in the front-rear direction via a linear guide (84), and is moved back and forth by a feed cylinder (not shown).

The second beam welding machine (51) for welding the inner panel (1) and the rear part of the beam (4) has the same structure as the first beam welding machine (50), and the description is omitted. . However, the second beam welding machine (51) is provided with a guide between the gantry (82) and the slide table (74) in order to be able to handle the three-door beam (4) and the five-door beam. Rail (86) and linear slide (87)
The intermediate table (8
The slide table (74) is provided on the intermediate table (85) so as to move back and forth with the interposition of 5). The second beam welding machine (51) performs welding in a state where the intermediate table (85) is advanced when welding a 5-door beam, and performs welding when welding a 3-door beam (4).
Welding is performed with the intermediate table (85) retracted.

The welding operation of the above automatic welding apparatus will be described. In a first step I, an operator carries the hinge side (2) and the sash (3) into the first welding means (B) and sets them.
Subsequently, the inner panel (1) is loaded and set with the welding surface facing downward. When the first clamp means (30) grips the inner panel (1) and the second clamp means (31) grips the sash (3), the servomotor (43) of the side welding machine (32) operates. , Electrode support arm (4
2) is retracted to the welding start position, intermittently retracted from there, and the stud gun (34) is operated at each stop,
Spot welding is carried out by sandwiching the hinge side (2) and the inner panel (1) between the stud gun (34) and the lower electrode (33). The sash welding machine is also operated to simultaneously perform spot welding of the inner panel (1) and the sash (3).

[0031] Inner panel (1) and hinge side (2)
When the welding of the sash (3) is completed, the ball screw (44) is rotated in the reverse direction to advance the electrode support arm (42) to the forward end and escape from the inner panel (1). Escape to the side.

When the side welding machine (32) and the sash welding machine escape, the first lifting cylinder (2) of the conveying means (A) is moved.
5) and the second elevating cylinder (26) extends to lower the elevating frame (23) and lower the clamp means (14). At the lower end, the clamp arm (21) operates to grip the inner panel (1). When the clamping means (14) grips the inner panel (1), the first clamping means (30) and the second clamping means (31) of the first welding means (B).
Opens to release the inner panel (1), and then the first lifting cylinder (25) and the second lifting cylinder (26) perform a shortening operation to raise the clamping means (14), and the hinge side (2) and The inner panel (1) to which the sash (3) is fixed by welding is carried out from the first welding means (B) and lifted up to the transfer line.

When the clamp means (14) rises to the rising end, the feed cylinder (20) extends to advance the slide base (12), and the gripped inner panel (1).
To the second step II. With the advance of the clamping means (14), the worker also moves to the second step II, where the beam (4) is placed on the first support (56) and the second support (57) of the beam loader (46). Put. When the beam (4) is placed, the retracting cylinder (55) performs a shortening operation to retract the loader body (54) into the second welding means (C) and carry the beam (4) below the welding position. After loading, the beam receiving base (64) of the lift mechanism is lifted to receive the beam (4) from the beam loader (46), lift it, and set it at the welding position.

On the other hand, the transport means (A) is configured such that the first lifting / lowering cylinder (25) extends to lower the lifting / lowering frame (23), and the second lifting / lowering cylinder (26) extends to operate the clamping means (14). Is further lowered, the inner panel (1) is carried into the second welding means (C), and set on the beam (4). After the setting, the clamp arm (21) is opened to release the inner panel (1), and then the first lifting cylinder (25) and the second lifting cylinder (26) are shortened to release the clamping means (14). Raise to the transport line. After ascending, the feed cylinder (20) is shortened to retract the slide base (12), and the clamping means (1) is moved.
4) is returned to the first step I.

When the inner panel (1) is set on the beam (4), clamping means (not shown) clamps the inner panel (1). Next, the first of the second welding means (C)
The slide base (74) of the beam welding machine (50) and the second beam welding machine (51) moves to the inner panel (1) side, and the first beam welding machine (50) and the second beam welding machine (51) are moved. Move to the welding start position. Thereafter, the servo motor (81) is operated to intermittently feed the first beam welding machine (50) and the second beam welding machine (51) in the width direction to spot the inner panel (1) and the beam (4). Weld.

When the welding of the inner panel (1) and the beam (4) is completed and the first beam welding machine (50) and the second beam welding machine (51) escape, the clamping of the second welding means (C) is performed. The means releases the inner panel (1), and then the pin cylinder (73) of the erecting means (47) shortens to erect the erecting pin (72), and then erects the erecting cylinder (71).
Makes the erecting arm (70) erect and raises the inner panel (1) by the erecting pin (72). When the inner panel (1) stands up, the operator takes out the inner panel (1) and sends it to a subsequent process.

When the inner panel (1) is taken out from the second welding means (C), the pin cylinder (73) and the upright cylinder (71) extend respectively, and the upright pin (72) and the upright arm (70). And return it to below the working position. In addition, the beam receiver of the lift mechanism (6
4) is lowered, and at the same time, the retracting cylinder (55) is extended to move the loader body (54) out of the second welding means (C).

When the inner panel (1) is carried out of the second welding means (C), the worker returns to the first step I and repeats the above operation.

[0039]

According to the present invention, since the inner panel is transported over the sky, the lower part of the transport means is opened to increase the installation space and work space, and the clamp means for gripping a part to be welded below the transport means is provided. A welding machine can be provided, and the entire apparatus can be made compact. In addition, since the inner panel is loaded and unloaded from above, the hinge panel, sash and inner panel to be welded are first welded in the first step before the inner panel that has been welded in the first step is loaded into the second step. In the second step, the beam can be set in the second welding means, so that the work procedure is streamlined and the work efficiency is improved. Further, in the second step, the inner panel
A second welding means for welding the beam and the beam,
Transport of inner panels that are transported in a horizontal position
A beam loader for supplying a beam to an input position,
A first support for supporting the tip of the beam, and the length of the beam
Beam movably disposed relative to the first support
Loader having a second support for supporting the rear part of the beam
And a third panel disposed in front of the loading position of the inner panel.
One beam welding machine and the rear part of the loading position of the inner panel
In the longitudinal direction of the beam to be welded with the first beam welding machine
And a second beam welding machine arranged to be relatively movable.
When welding a 5-door beam or a 3-door beam
Welding beams of different lengths, such as when welding a beam
Can respond to.

Since the transfer means moves the clamp means for gripping the inner panel by the double speed mechanism, the transfer speed is increased, the transfer of the inner panel can be performed at a high speed, the cycle time is shortened, and the work efficiency is improved. Also, in the second step
Raise the inner panel that is placed in a horizontal position
After the beam is welded in the second step
The inner panel can be raised.

If a stud gun is used for welding, multiple spots can be welded at a time, so that small parts can be welded in one step, and a plurality of parts such as hinge side, sash, and beam are welded to the inner panel. In the first step, the inner panel, the hinge side and the sash are welded, and the second step is performed.
The beam can be welded in the process, the process can be consolidated compared to the conventional method, and the workability is improved.

Further, the gun slide mechanism can be simplified, and by using a common stud gun, the number of spare guns can be reduced, which is advantageous in terms of maintenance.

[Brief description of the drawings]

FIG. 1 is a side view of an automatic welding apparatus according to the present invention.

FIG. 2 is a plan view showing a conveying means of the automatic welding device according to the present invention.

FIG. 3 is a sectional view of a conveying means of the automatic welding device according to the present invention.

FIG. 4 is a plan view showing first welding means of the automatic welding device according to the present invention.

FIG. 5 is a plan view showing a second welding means of the automatic welding device according to the present invention.

FIG. 6 is a front view showing a second welding means of the automatic welding device according to the present invention.

FIG. 7 is a schematic plan view for explaining a conventional welding operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS A Conveying means B 1st welding means C 2nd welding means 1 Inner panel 2 Hinge side 3 Sash 4 Beam 14 Clamping means 16a, 16b Rack 17 Pinion gear 32 Side welder 33 Lower electrode 34 Stud gun 50 Beam welder 51 Beam welder

Claims (3)

(57) [Claims] In a first step, an inner panel of a door panel of an automobile is provided.
Weld the hinge side and sash to the flannel and
Weld the beam to the inner panel of the car door panel
In the automatic welding apparatus, the state where the inner panel is laid down in the first process
A first clamp means to be gripped by
Holding means for holding the sash and a second clamp for holding the sash
And the welding between the inner panel and the hinge side.
Side welder, and the inner panel and sash
A first welding means having a sash welding machine for performing welding, and a gripping of the inner panel which has been welded in the first step
And transfer the inner panel from the first step to the second step
The third clamping means, and raising the third clamping means in the first step and the second step.
And between the first step and the second step,
A conveying means for reciprocating the three clamp means upward, and, in the second step, a lateral movement by the third clamp means.
Beam at the loading position of the inner panel transported
A beam loader that supplies
A first support for supporting the first support in the longitudinal direction of the beam;
To support the rear part of the beam.
A beam loader having a second support base,
1st beam welding machine arranged in front of the loading position of the tunnel
And a bead to be welded at the rear of the loading position of the inner panel.
Relative to the first beam welder in the longitudinal direction of the beam
A second beam welding machine disposed in the inner pipe.
Second welding means for welding the tunnel and the beam
An automatic welding device for an automobile door panel. 2. The automatic door panel according to claim 1,
In the welding equipment, it is disposed in a state of being laid down in the second process.
Erection means for erecting the inner panel
An automatic welding device for an automobile door panel. 3. An automatic door panel for an automobile according to claim 1.
In the welding apparatus, the side welder and a plurality of lower electrodes and the stud gun to secure the lower electrode to the welding position, in which the stud gun and to perform welding by moving on the lower electrode An automobile characterized by that
Automatic welding equipment for door panels .