JPH07246479A - Automatic welding equipment - Google Patents

Abstract

PURPOSE:To reduce the number of stages and to improve workability by increas ing work carrying speed by installing a carrier device movable vertically and reciprocally above a clamping means to perform the delivery of an inner panel in first and second stages. CONSTITUTION:Since the inner panel is carried in an above space, the lower side of a carrier means A can be utilized, and installing space and working space can be widened, and the clamping means 14 which clamps parts to be welded and a welding machine 32 can be provided on the lower side of the carrier means A, thereby making the whole device compact. In addition to that, since the inner panel 1 can be carried in/out from the upper side, a hinge side to be welded, a sash 3 and the inner panel 1 can be set on a first welding means B in advance in the first stage before the inner panel 1 completed with welding in the first stage is carried to the second stage. In the second stage, a beam can be set on a second welding means in advance, which rationalizes working procedure and improves working efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner panel forming a door panel of an automobile, a hinge side and a sash,
The present invention relates to a welding device that automatically welds 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. The inner panel also has a hinge side for attaching a hinge for opening and closing the door panel to a vehicle body, and a window glass. The sash and the beam for reinforcement are welded.

Hinge side and sash on the inner panel,
To weld a beam or the like, as shown in FIG. 7, while carrying the inner panel (1) on the belt conveyor, the hinge side (2), the sash (3), and the beam (4) are sequentially supplied to perform spot welding. Was there.

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 spot welding machine (not shown) temporarily sews it at several places. Strike. Next, attach the inner panel (1) to the belt conveyor (6)
To transfer the sash (3) to the inner panel (1) in the second step II, and to transfer the hinge side (2).
And the sash (3) are welded,
In step III, the beam (4) is supplied, the beam (4) is tentatively hit, and after the additional hit in the fourth step IV, the inner panel (1) is erected and sent to the next step.

In each step, the hinge side (2), the sash (3), and the beam (4) are supplied manually by an operator while moving along with the transportation of the inner panel (1).

[0006]

Since the inner panel (1) is conveyed by the belt conveyor (6), the conveying speed is slow, and the component mounting surface of the inner panel (1) is conveyed toward the upper surface. Since the inner panel (1) supplies the parts to be welded after being sent to each process, the workability is poor and the cycle time is very long.

Further, since the inner panel (1) is conveyed by the belt conveyor (6), the inner panel (1), the hinge side (2) to be welded, the sash (3), below the conveying line of the inner panel (1), 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 narrow, and C-type and X-type guns are used for spot welding. Since these welding guns are large and require a wide working space, it is possible to weld many welding points at once. First, the welding of each component must be performed separately in the temporary striking step and the additional striking step, resulting in an increase in the number of steps.

The present invention is intended to provide an automatic welding apparatus in which the number of steps is reduced and the work is conveyed quickly to improve workability.

[0009]

According to the present invention, in a first step, a first welding is provided with a side welder for welding an inner panel and a hinge side and a sash welder for welding an inner panel and a sash. By providing means, in the second step,
A second welding means is provided which includes a beam welding machine for welding the inner panel and the beam, and the clamping means for delivering and receiving the inner panel in the first step and the second step can be raised and lowered and the first step and A transfer device configured to be reciprocally movable between the second step and the second step is installed above the first welding means and the second welding means.

Further, the carrying means is such that the clamping means for holding the inner panel is moved by a double speed mechanism composed of a pair of racks and a pinion gear.

Further, the welding means comprises a plurality of lower electrodes and a stud gun, the lower electrode is fixed to a welding position, and the stud gun is moved onto the lower electrode to perform welding. Is equipped with.

[0012]

In the above automatic welding apparatus, since the inner panel is conveyed above the space, the lower side of the conveying means is opened, and the installation space and the working space are widened, and the clamp means and the welding machine for grasping the parts to be welded under the conveying means. Can be provided, and the entire device can be made compact.

Further, since the conveying means moves the clamping means for holding the inner panel by the double speed mechanism, the conveying speed is increased and the work efficiency is increased.

If a stud gun is used for welding, multiple spots can be welded at once, the steps can be integrated, and workability is improved.

[0015]

Embodiments 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 attached to an inner panel.

According to the present invention, as shown in FIGS. 1 and 2, the inner panel (1) is vertically transported by the transport means (A) over two steps, and in the first step I, the first step is performed. Welding means (B)
The hinge side (2) and the sash (3) are welded to the inner panel (1) by the second welding means (C) in the second step II.
The beam (4) is welded 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 installed over two welding steps, and this guide is installed. A slide base (12) is slidably mounted on a 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 steps. It is provided so that it can move up and down.

The feeding means (15) for sliding the slide base (12) comprises a pair of racks (16a) (16).
b) and a pinion gear (17) are provided, and the upper fixed rack (16a) is attached to the support frame (1).
0), and the lower movable rack (16b) is fixed to the slide base (12). And the support frame (1
The feed cylinder (20) attached to (0) pushes and pulls the pinion gear (17). The expansion / contraction operation of the feed cylinder (20) causes the pinion gear (17) to move while rotating, thereby feeding the movable rack (16b) at a double speed to quickly move the slide base (12).

The clamp means (14) comprises a plurality of clamp arms (21) for clamping the inner panel (1), and an elevating frame (supported by a slide base (12) via guide rods (22) so as to be able to ascend and descend ( 23),
It is supported so that it can be raised and lowered through a guide rod (24). Then, the elevating frame (23) is attached to the first elevating cylinder (25) mounted on the upper surface of the slide base (12).
And the clamp means (1) by the second lifting cylinder (26) mounted on the upper surface of the lifting frame (23).
4) is raised and lowered. The clamp means (14) moves up and down in two stages by 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) are cylinders with a brake that slide at high speed.

The first welding means (B) installed in the first step I is, as shown in FIGS. 1 and 2, a jig surface plate (27).
First clamp means (30) for holding the inner panel (1), second clamp means (31) for holding the sash (3), and support means (not shown) for supporting the hinge side (2) are provided on the top. 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) are provided.

The side welder (32) has a lower electrode (33).
And a stud gun (34), and a plurality of lower electrodes (33) are erected on the electrode mounting plate (35). Although not all of the lower electrode (33) is shown, the inner panel (1) and the hinge side (2) are attached to the electrode attachment plate (35) so as to correspond to all the places to be welded.
The electrode mounting plate (35) is lifted and lowered by the lift cylinder (36) and lifted during welding to press the lower electrode (33) against the hinge side (2). Further, a guide rail (40) is installed in the front-rear direction on the upper surface of the pedestal (37) installed on the side of the welding position as shown in FIG.
0) is attached with an electrode support arm (42) through a linear slide (41), the tip of the electrode support arm (42) is extended to above the welding position, and the stud gun (3
4) are attached. Although not shown, 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) has a ball screw (4) whose rotation is controlled by a servomotor (43).
It is moved back and forth in 4) and is moved back and forth from the front standby position of the loading position of the inner panel (1) to the welding position.
At the welding position, the electrode support arm (42) is gradually moved to perform position indexing, and the inner panel (1) is formed by the stud gun (34) and the lower electrode (33).
And hinge side (2) are welded.

Further, the sash welding machine uses an eco-rising gun as in the conventional case, and is arranged 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 the beam (4) to the upper part, a standing means (47) for standing up the welded inner panel (1), and a first beam for welding the inner panel (1) and the beam (4). A welder (50) and a second beam welder (51) are installed. Further, a clamp means (not shown) for gripping the inner panel (1) is also installed at a predetermined position.

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

The loader body (54) has a first support table (56) for supporting the front portion (4a) of the beam (4) fixed to the front portion, and the rear portion (4b) of the beam (4) to the rear portion. A second support base (57) for supporting the is attached as described later. Second
The support base (57) has guide rails (60) installed in the front-rear direction on the loader main body (54) in order to accommodate three-door type and five-door type having different lengths. A slide table (62) is slidably provided on the slide table (61) via a slide table (62).
The 2nd support stand (57) is attached on the top. The slide base (62) is moved back and forth by a slide cylinder (63) attached to the loader body (54), and when supporting a short 5-door beam, the slide cylinder (63) is shortened. When the second support base (57) is moved forward to support the long three-door beam (4), the slide cylinder (63) is extended to move the second support base (57).
Back to move the first support base (56) and the second support base (5)
Adjust the distance to 7) to match the beam length.

A lift mechanism (not shown) for lifting the beam (4) is provided below the beam loading position of the jig surface plate (45), and the first support table (56) and the second support table (57) are provided. )
When the beam (4) held by and is carried in, the beam receiving base (64) of the lift mechanism rises and is held by the first supporting base (56) and the second supporting base (57). Receive the beam (4) and lift it to the welding position.

The standing means (47) is provided with a rotary shaft (67) via a bracket (66) on a support table (65) installed above the beam loader (46) on the jig surface plate (45). Is rotatably supported, and the standing arm (70) is attached to the rotating shaft (67). The rotating shaft (67) is rotated by a standing cylinder (71) swingably attached to the side surface of the support table (65). When the standing cylinder (71) extends, the standing arm (7) is rotated.
When 0) falls down and shortens, the standing arm (70) stands up. Further, erection pins (72) are rotatably attached to both upper ends of the erection arm (70), and the pin cylinders (73) attached to the erection arm (70) erect the erection pins (72). . When the pin cylinder (73) extends, the upright means (47) causes the upright pin (72) to fall down and escape downward from the beam (4) loading line, and the pin cylinder (73) performs a shortening operation. As a result, the upright pin (72) is upright and hits the inner panel (1). Then standing cylinder (71)
Shortens to raise the standing arm (70) to raise the inner panel (1).

The first beam welding machine (50) for welding the inner panel (1) and the tip of the beam (4) uses a pinch gun, and a guide rail (75) and a linear unit are mounted on the slide table (74). Gun table (77) supported slidably in the width direction through the slide (76)
Mounted on the top, the gun table (77) is moved in the width direction by the ball screw (80) provided on the slide table (74). The ball screw (80) is the servo motor (8
The rotation is controlled in 1). Also slide table (74)
In order to avoid interference between the inner panel (1) loaded from above and the first beam welding machine (50), the jig surface plate (4)
5) The guide rail (8
3) and a linear guide (84) so as to be slidably supported in the front-rear direction, and can be moved back and forth by a feed cylinder (not shown).

The second beam welder (51) for welding the inner panel (1) and the rear portion of the beam (4) has the same structure as the first beam welder (50), and the description thereof will be omitted. . However, the second beam welder (51) is provided with a guide between the pedestal (82) and the slide table (74) so as to be compatible with the beam (4) for 3 doors and the beam for 5 doors. Rail (86) and linear slide (87)
Intermediate table (8
5) is interposed, and a slide table (74) is provided on the intermediate table (85) so as to move back and forth. The second beam welder (51) performs welding with the intermediate table (85) moved forward when welding the beam for 5 doors, and when welding the beam (4) for 3 doors,
Welding is performed with the intermediate table (85) retracted.

Explaining the welding operation of the above automatic welding apparatus, in the first step I, an operator carries in the hinge side (2) and the sash (3) to the first welding means (B) and sets them.
Then, the inner panel (1) is carried in 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 servo motor (43) of the side welder (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 performed by sandwiching the hinge side (2) and the inner panel (1) with the stud gun (34) and the lower electrode (33). The sash welding machine is also operated to perform spot welding of the inner panel (1) and the sash (3) at the same time.

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 above the inner panel (1). ) To the side.

When the side welder (32) and the sash welder escape, the first lifting cylinder (2) of the transfer means (A).
5) and the second elevating cylinder (26) extend 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 clamp means (14) grips the inner panel (1), the first clamp means (30) and the second clamp means (31) of the first welding means (B).
Open to release the inner panel (1), and subsequently, the first lifting cylinder (25) and the second lifting cylinder (26) perform a shortening operation to raise the clamping means (14) to move 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 so that the slide base (12) is advanced and the inner panel (1) gripped.
Is sent to the second step II. With the advance of the clamping means (14), the operator also moves to the second step II, where the beam (4) is placed on the first support base (56) and the second support base (57) of the beam loader (46). Put. When the beam (4) is placed, the retracting cylinder (55) is shortened to retract the loader body (54) into the second welding means (C) and carry the beam (4) below the welding position. After carrying in, the beam pedestal (64) of the lift mechanism rises to receive the beam (4) from the beam loader (46), lift it, and set it at the welding position.

On the other hand, in the conveying means (A), the first elevating cylinder (25) extends to lower the elevating frame (23), and the second elevating cylinder (26) extends to clamp the clamping means (14). Is further lowered, and the inner panel (1) is carried into the second welding means (C) and set on the beam (4). After 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 move the clamping means (14). Raise to the transfer line. After the ascent, the feed cylinder (20) is shortened to retract the slide base (12), and the clamp means (1)
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 bases (74) of the beam welder (50) and the second beam welder (51) move to the inner panel (1) side, and the first beam welder (50) and the second beam welder (51) are moved. Move to the welding start position. Thereafter, the servo motor (81) operates to intermittently feed the first beam welder (50) and the second beam welder (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 welder (50) and the second beam welder (51) escape, the second welding means (C) is clamped. The means releases the inner panel (1), and then the pin cylinder (73) of the standing means (47) shortens to raise the standing pin (72), and then the standing cylinder (71).
Shortens to raise the standing arm (70) and pushes up the inner panel (1) with the raising pin (72) to raise it. When the inner panel (1) stands up, a worker takes out the inner panel (1) and sends it to the subsequent process.

When the inner panel (1) is taken out from the second welding means (C), the pin cylinder (73) and the standing cylinder (71) are extended so that the standing pin (72) and the standing arm (70). Lay down and return to the lower position of the working position. Also, the beam pedestal of the lift mechanism (6
4) descends, and at the same time, the retracting cylinder (55) extends so that the loader body (54) is withdrawn from the second welding means (C).

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

[0039]

According to the present invention, since the inner panel is conveyed over the air, the lower side of the conveying means is opened, the installation space and the working space are widened, and the clamping means for grasping the parts to be welded under the conveying means is provided. A welding machine can be provided, and the entire device can be made compact. Moreover, since the inner panel is loaded and unloaded from above, the hinge side, sash, and inner panel to be welded in the first step are first welded in advance in the first step before the inner panel that has been welded in the first step is loaded in the second step. The beam can be set in the second welding means in the second step, the work procedure is rationalized, and the work efficiency is improved.

Further, since the conveying means moves the clamp means for holding the inner panel by the double speed mechanism, the conveying speed is increased, the inner panel can be conveyed at a high speed, the cycle time is shortened, and the working efficiency is improved.

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

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

[Brief description of 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 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 apparatus according to the present invention.

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

[Explanation of symbols]

 A transport means B first welding means C second welding means 1 inner panel 2 hinge side 3 sash 4 beam 14 clamp means 16a, 16b rack 17 pinion gear 32 side welder 33 lower electrode 34 stud gun 50 beam welder 51 beam welder

Claims (3)

[Claims] 1. A first welding means comprising a side welder for welding an inner panel and a hinge side and a sash welder for welding an inner panel and a sash is provided in the first step, and the second step is performed. And a second welding means provided with a beam welding machine for welding the inner panel and the beam,
The first welding means and the second welding means include a transfer device configured to move up and down the clamp means for delivering the inner panel in the step and the second step and to reciprocate between the first step and the second step. An automatic welding device characterized by being installed above the welding means. 2. The automatic welding apparatus according to claim 1, further comprising a conveying means configured to move a clamp means for holding the inner panel by a double speed mechanism including a pair of racks and a pinion gear. 3. A plurality of lower electrodes and a stud gun are provided,
The automatic welding apparatus according to claim 1, further comprising a side welder that fixes the lower electrode at a welding position and moves the stud gun onto the lower electrode to perform welding.