JPH04201787A - Automotive door manufacturing method and device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention involves assembling a door inner by coupling accessory parts such as a sash to an inner panel, coupling a beam to the door inner, and then assembling the door inner to an outer panel. The present invention relates to a method for manufacturing a motor vehicle door and to an apparatus used to carry out the method.

(Prior Art) Conventionally, an automobile door manufacturing apparatus has been equipped with a door inner assembly station, a beam joining station, and a door inner and outer panel assembly station in order from the starting end of the line. The inner panel set on the tool and accessory parts such as the sash and hinge side were welded together using a welding gun provided in a welding jig to assemble the door inner, and then the door inner was placed at the beam joining station using a transfer device. Transfer to a welding jig, set the beam on this door inner, weld the beam to the door inner with a welding gun provided in the jig, and then transfer the door inner to the jig placed at the assembly station using a transfer device. It is known to manufacture a door by transferring an outer panel to a door inner, and then performing a seam folding process and welding the seam folds (see Japanese Patent Publication No. 57-3467).

(Problems to be Solved by the Invention) Each of the above jigs is specialized for each door model, and it is necessary to prepare multiple types of jigs in preparation for changing models.
In order to complete the assembly of the door inner at the assembly station as in the above conventional technology, it is necessary to install a large number of welding guns on the welding jig placed at the station, which increases the cost and requires expensive welding. Preparing a large number of jigs is not a good idea in terms of cost.

In this case, reduce the number of welding guns installed in the welding jig, and only perform west welding of the door inner at the assembly filter station, weld at the next station, and perform barrel welding of the door inner using the robot. There is no need to replace the welding robot, and the cost of the entire equipment can be reduced. .

However, with this method, an additional welding station is added between the assembly station and the beam joining station, which increases the line length, and furthermore, the welding jig placed at the beam joining station is costly, which reduces equipment costs. A significant reduction cannot be expected.

In view of the above points, the present invention provides a welding jig for door inners at a low cost by reducing the number of welding guns mounted thereon by performing multi-stroke welding of door inners using a welding robot, and also provides a welding jig for beam joining. Eliminating the need for welding jigs,
The object of the present invention is to provide a method and apparatus for manufacturing an automobile door, which can reduce equipment costs without increasing the line length.

(Means for Solving the Problems) In order to achieve the above object, the method of the present invention involves assembling a door inner by combining accessory parts such as a satchel with an inner panel,
In the method of manufacturing an automobile door by assembling a door inner to an outer panel after joining a beam to the door inner, the assembly process of the door inner is a temporary attachment process of temporarily attaching the inner panel and accessory parts on a welding jig. The process is divided into an additional welding process in which additional welding is performed on the door inner using a welding robot.
The present invention is characterized in that a beam is introduced into a station for performing an additional welding process, and the beam is welded to the door inner by the welding robot.

In addition, the device of the present invention includes, in order from the starting end side, a tacking station where a welding jig is placed to support the inner panel and the attached parts and tacking them together, an additional welding station where a welding robot is placed, and an outer panel welding station. A first transfer device includes a transfer jig for gripping the door inner and lifts and transfers the door inner from the tacking station to the additional stroke station on a line provided with an assembly station in which a supporting outer panel set jig is arranged. and a second transfer device that is equipped with a transfer jig that grips the door inner, lifts and transports the door inner from the multi-stroke station to the assembly station, and assembles the door inner to the outer panel on the set jig, A reciprocally movable beam loading device is provided between the additional stroke line and the beam setting station on the side thereof, and a beam setting jig for holding the beam is mounted on the loading device, and the beam setting jig and each of the above-mentioned It is characterized in that the door inner can be freely delivered to and from the transfer jig of the transfer device.

(Function) The door inner, which has been temporarily attached using a welding jig at the temporary attachment station, is gripped by the transfer jig of the first transfer device, lifted up and transported to the additional stroke station. Then, at the extra-stroke station, extra-stroke welding is performed by the welding robot while the door inner is held in the transfer jig of the first transfer device. During this welding operation, the beam injection device is moved from the beam setting station to the multi-stroke station, and after welding, the door inner is transferred from the transfer jig to the beam setting jig of the beam injection device. According to this, the beam on the setting jig is joined to the door inner, and in this state, the beam is welded to the door inner by a welding robot.

When this welding is completed, the door inner is transferred from the beam set jig to the transfer jig of the second transfer device and lifted.
The second transfer device transports the door inner from the multi-stroke station to the assembly station, and the door inner is assembled onto the outer panel held by the outer panel setting jig.

(Example) The illustrated example is for manufacturing an automobile door W shown in FIG.
, a, a 19th door inner panel W4 formed by joining a sash W2 and a hinge side W3 to an inner panel W1 formed with a.
As shown in the figure, Bee 1. After joining W, door inner W
4 to the outer panel W6, fold the periphery of the outer panel W6 as shown in FIGS. 19 and 20,
This is manufactured by welding the break. A stiffener W7 is welded to the inner surface of the upper edge of the outer panel W6.

Referring to FIGS. 1 and 2, reference numeral 1 indicates a tacking station provided at the starting end of the line, and in front of it, an additional stroke station 2 and an assembly station 3 are provided in order. Welding jig 4 and additional stroke station 2
A plurality of welding robots 5 and an outer panel setting jig 6 are arranged at the assembly station 3, and a ceiling-mounted nozzle that can freely reciprocate between the tacking station 1 and the additional work station 2 is installed on the line. A ceiling-suspended second transfer device 8 that can freely reciprocate is provided between the first transfer device 7 and the additional stroke station 2 and the assembly station 3, and is further arranged at the additional stroke station 2 and the side thereof. A beam insertion device 10 that can freely move back and forth between the beam setting station 9 and the assembly station 3 and an outer panel setting station 11 on its side.
A reciprocating transfer device 12 is provided between the
At the temporary attachment station 1, the inner panel W1, the sash W2, and the hinge side W3 are set on the welding jig 4, and these are temporarily attached on the jig 4 to assemble the door inner W4. Transfer device 7
It is held by the transfer jig 7a prepared for
After the welding robot 5 performs additional stroke welding on the door inner W4 at the station 2, the beam W is held in a beam setting jig 10a provided in the beam injection device 10 and is input into the additional stroke station 2. The welding robot 5 welds and connects the door inner W4 to the door inner W4, and then the door inner W4 is held by a transfer jig 8a provided in the second transfer device 8 and transported to the assembly station 3, and then transferred to the outer panel set jig 6 by the transfer device 12. The door inner W4 is assembled to the outer panel W6 which is transported and set.

The first and second transfer devices 7 and 8 each include a traveling frame 7b that moves back and forth along a common guide frame 13 installed on the line ceiling;
The respective transfer jigs 7a are attached to the lifting frames 7c and 8c via tool holders 7d and 8d.
8a is removably suspended, and both transfer devices 7
.
When the traveling frame 8b is reciprocated between the assembly station 3 and the additional stroke station 2 by e, the traveling frame 7b of the first transfer device 7 is reciprocated between the additional stroke station 2 and the tacking station 1. . In addition, the elevating frame 8 of the second transfer device 8
A wrist portion 8r having degrees of freedom in two axes of forward and backward movement and forward and backward rocking is provided at the lower end of c, and a transfer jig 8a is suspended from the wrist portion 8r via the tool holder 8d. , the wrist portion 8
The attitude of the door inner W4 is controlled by the movement f, so that the door inner W4 can be set on the outer panel W6 without causing interference with the bent edge W b a for cross-folding of the outer panel W6. Each transfer jig 7a, 8a moves the door inner W4 to the window hole W1 of the inner panel W1. A plurality of gripping tools 7 ml + 8 ml are provided for gripping at the edge of the hole, etc.

The beam injection device 10 is connected to a traveling base LOd which is reciprocated between the two stations 2 and 9 by a motor toe along a guide rail lOb laid between the additional strike station 2 and the beam set station 9. 10 units
A slide table 10e is mounted which is movable in a direction orthogonal to the moving direction of d, that is, in a front-back direction, and a lift table 10r is supported on the slide table 10e. Tool 10a
The beam W is detachably attached to the jig 10a as shown in FIGS. 4 to 6.

A pair of work receivers L011 supporting the door inner W
4 is provided with an inner panel W, a transparent window W, and a plurality of clampers 10112 for positioning and supporting by clamping the hole edge of a, and at a setting station 9, a beam W, is set, and the traveling table 10e is moved to the multi-stroke station 2, and then the slide table 10e is advanced to raise the elevating table lOr, and at the same time, the transfer jig 7a of the first transfer device 7 is lowered. Then, the door inner W4 which has been welded with additional strokes gripped by this is delivered to the setting jig tOa, and the door inner W4 is positioned and supported by the clamper 1O82, and then the workpiece holder l
011 is joined to the fixed position of the door inner W4, and in this state the beam W supported by the welding robot 5 is
, are welded to the door inner W4.

The setting jig 10a needs to be replaced depending on the model, so a plurality of stockers 16 for the setting jig 10a are installed in the machine frame 15 installed above the travel path of the beam injection device 10.
were installed side by side. The stocker 16, as shown in FIG.
A lifting bar 16b that is raised and lowered by a cylinder Lea is suspended from a bracket 15a on the machine frame 15, and a pair of claw pieces 16e that are opened and closed by a cylinder 16C via a toggle link 16d are attached to the lower end of the bar 16b. A hook 10 is fixed to the center of the upper surface of the setting jig 10a.
．． , the setting jig 10a is removably suspended from the stocker 16 by engaging the claw pieces 16e, and when replacing the jig, the beam loading device 10 is moved to a position directly below the empty stocker 16. The set jig 10a that has been completed is received by the stocker 16, and then the device 10 is moved to a position directly below the stocker 16 that suspends the set jig LOa to be used next, and the set jig 10a is transferred to the beam loading device. I decided to hand it over to 10.

As shown in FIGS. 8 and 9, the welding jig 4 includes a plurality of clampers 4a that position and clamp the inner panel W1, the sash W2, and the hinge side W, and the sash W2 and the hinge for the inner panel W. The welding jig 4 is equipped with a plurality of welding guns 4b for welding the overlapping portion of the side W3 at the minimum necessary welding points to the extent that these parts do not separate. The welding jig 4 is mounted on a jig stand 17 that is raised and lowered around the shaft 17b at the rear end, and the welding jig 4 is erected rearward by the movement of the jig stand 17, and in this state, the inner panel W1 etc. are attached from the rear. The workpiece can now be set.

Furthermore, as shown in FIGS. 1 and 3, a jig stocking device is provided on the side of the tacking station 1, which includes a plurality of vertically stacked stock stands 18b having support rails 18a for the welding jig 4, which are movable up and down. 181, and on the other hand, the lock cylinder 17c of the welding jig 4 and the cylinder 1 are placed on the jig table 17.
7d and a rail 17e that is moved up and down, and when the lock cylinder 17C is released, the rail L7e is moved up and down.
By moving the welding jig 4 upward, the welding jig 4 is supported on the rail 17e, and the welding jig 4 can be exchanged between the stock stand 18b and the jig stand 17. In addition, the welding jig 4 includes:
A plurality of poles 4C are erected to which the transfer jig 7a of the first transfer machine 7 can be docked, and the transfer jig 7a is docked to the welding jig 4 at the poles 4C, and both jigs are docked. 4 and 7a can be replaced as a set.

The outer panel setting jig 6 includes outer panels W,
The setting jig 6 includes a plurality of supports 6a that support the setting jig 6, and a conveyor 6b that can be raised and lowered and has a pair of belts 6□.
is mounted on a jig stand 19 that can be freely rotated by a cylinder 19a provided in the assembly station 3, and can be freely reversed between a horizontal position and a vertical position by rotating the jig stand 19 forward and backward by 90 degrees. With the setting jig 6 in a horizontal position, the outer panel W6 is moved to the support jig 6a by the transfer device 12.
In this state, the second transfer device 8 moves the door inner W4 to the outer spring TT as described above.

W6, then the setting jig 6 is placed in a vertical position, the conveyor 6b is raised to support the belt 6 and the door W on top, and the belts 6, 1 are driven by the conveyor motor 6.2. The door W is taken out in the next process of folding.

A jig stock device 182 similar to that described above is also provided on the side of the assembly station 3, and a plurality of poles 6c are provided to dock the transfer jig 8a of the second transfer machine 8 to the set jig 6. erected, and transfer the setting jig 6 to this jig 8a.
The jig stand 19 and the stock stand tab of the jig stock device 182 can be freely exchanged in a docked state.

A stiffener coupling station 20 is provided between the assembly station 3 and the outer panel setting station 11 on its side, and the transfer device 12
from the setting station 11 to the combining station 2
The outer panel 3 is intermittently fed to the assembly station 3 through the assembly station 3, and the stiffener W7 is welded to the outer panel W6 at the joining station 20.

This will be explained in more detail with reference to FIGS. 1 and 10. On one side of the bonding station 20 there is provided a stiffener feeder 21.
A welding robot 22 is placed on the other side, a sealing robot 23 is placed above the other side, and a set robot 25 is mounted on a machine frame 24 installed horizontally in the space above the travel path of the transfer device 12. The robot 25 picks up one stiffener W7 from the supply device 21, and after the sealing robot 23 applies seek to the stiffener W7, the setting robot 25 sets the stiffener W7 on the outer panel W6, and in this state, the welding robot 2
2, the stiffener W7 is welded to the outer panel W6.

The supply device 21 includes a transfer unit 21□, which is formed by arranging a plurality of retainers 21c of the stiffeners W7 at a constant pitch on an elevating frame 21b supported by a movable frame 21a that can move forward and backward;
It is composed of a receiving unit 212 consisting of a chain 21d that is driven in circulation and a holding device 21e attached at a constant pitch,
With the stiffener W7 inserted into the holder 21c of the transfer unit 211, the movable frame 21a is moved forward and the elevating frame 21b is moved.
By lowering the holder 2 of the receiving unit 21□
1e, the holder 21e is moved forward one pitch by the intermittent drive of the chain 21d, and the set robot 25 picks up the stiffener W7 at a fixed position.

As shown in FIGS. 11 and 12, the set robot 25 is moved along a rail 24a on the machine frame 24 by a motor 25a to a receiving position on the supply device 21 side and a connecting station via a rack and pinion mechanism 25b. A lifting frame 25e that is raised and lowered by a motor 25d via an internal rack and pinion mechanism is provided on a traveling frame 25c that reciprocates between the set position on the John 11 side, and a rack is attached to the lower end of the lifting frame 25e by a motor 25r. The traveling frame 25. A movable frame 25h that moves back and forth in a direction perpendicular to the direction of movement of C (longitudinal direction of the stiffener) is attached, and a chuck unit 25j that is rotated by a motor 25j via an internal gear is pivotally supported on the movable frame 25h. Chunk unit 25j is a set in which a plurality of clampers 25k for gripping the stiffener W7 are attached, and a gripping tool 2547 in the shape of a long bar in the longitudinal direction of the stiffener W7 is removably held at a connecting pin 25m at the tail end of the gripping tool 2547. The robot 25 is moved back to the receiving position and the supply device 21
Then, the stiffener W7 is gripped by the gripping tool 25g and picked up, and then the setting robot 25 is moved forward to the setting position, and the gripping tool 25g is rotated about its axis via the chuck unit 25j to change the posture of the stiffener W7. A sealant is applied to this by the sealing robot 23 under control, and then, by rotating the gripping tool 25g, the stiffener W7 is set in a predetermined set posture and set on the outer panel W6. The gripping tool 25g is specialized depending on the model, and in order to replace it, a gripping tool 2541) is attached to the machine frame 24.
A stock device 26 for holding a plurality of items is provided.

As shown in FIG.
Slide frame 26 attached to the side so that it can move forward and backward using 8b+
In b, a plurality of stockers 28f are arranged in parallel, each having a pair of claw pieces 26e that are opened and closed by a cylinder 26c via a toggle link 26d to grasp a single-shaped protrusion 25n protruding from the upper surface of the tail end of the gripper 251. The movable frame 25h of the robot 25 is moved while the set robot 25 is moved to a position that matches the predetermined stocker 26''.
the protrusion 25n of the gripper 251 on the stocker 2.
61', then move the elevator frame 25e to raise the gripper 254), insert the protrusion 25n from below between the pair of claws 2[ie] of the stocker 26r, and in this state After closing the claw piece 28e and gripping the protrusion 25n, the chuck unit 25j is released from the chuck, the movable frame 26b is moved backward, and the connecting bottle 2 at the tail end of the gripper 251 is moved back.
5a from the chuck unit 25j, and attach the gripping tool 25.5a to the stocker 28g. Q is transferred, and the set robot 2 is moved from the stocker 26r by the reverse operation to the above.
gripper to 5 25. Ill transfer is now possible.

By the way, even when the set robot 25 is moved to the return end position, which is the receiving position, the gripping tool 251 does not move to the position directly below the stocker 28f' located near the end of the machine frame 24, and does not move to the position directly below the stocker 28f' located near the end of the machine frame 24. 26 "Gripper 2 between
When transferring 5N, move the slide frame 26b and hold the stocker 26r with the gripper 25! ! Move to the position directly above.

With reference to FIGS. 1 and 10, the bonding station 20
is provided with a holder 27 for holding the edge of the outer panel W7 on the opposite side from the stiffener joint edge on one side with the transfer device 12 in between, and a backper 28 for receiving the stiffener joint edge on the other side. As shown in FIG. 14, the back par 28 is provided with a plurality of retainers 211a and suction cups 28b that abut the outer surface of the stiffener joint edge at each welding location.
and a welding gun 22 mounted on a welding robot 22.
a, as shown in Fig. 15, the stiffener W7 and the temporary
8a and energized, so that the stiffener w7 can be welded to the outer panel W6 without leaving any dents on the outer panel W6.

The back par 28 is also specialized depending on the model, and an exchange device 29 is provided for automatically replacing the back par 28 when changing the model.

As clearly shown in FIGS. 16 and 17, the exchange device 29 has three upper and lower sprockets mounted on a pair of support frames 29a and 29a, which are spaced apart in the longitudinal direction of the back par 28. 29b and a lower rear drive sprocket 29c, these sprockets 29b,
A plurality of back pars 28 are horizontally suspended between a pair of chains 29a which are stretched over a pair of chains 29a with gaps in the chain circulation direction.
9c is driven by a motor 29e, any one of these back pars 28 can be freely selected to the upper operating position, and the back par 28 can be replaced depending on the model. The back par 28 selected to be in the operating position is locked in the operating position by a locking member 29g provided at the upper end of each support frame 2-9a and moved back and forth by a cylinder 29r.

Further, a sputter cover 29h is provided between both support frames 29a to prevent spatter from scattering to the back par 28 located at a position other than the operating position. The force t<-2!3h
In order not to interfere with this when replacing the back par 28,
The cylinder 29i allows it to be folded upward via a link 29j.

(Effect of the invention) 0.4 As is clear from the above description, according to the present invention of claim 1, the zeta welding robot performs additional stroke welding of the door inner, so the welding jig for assembling the door inner does not require tack welding. Since the beam is joined to the door inner with the same welding robot, there is no need for a welding jig for beam joining, and the additional welding of the door inner and the joining of the beam can be done at the same station. The process can be carried out using the same method, reducing equipment costs and eliminating the need to increase line length.

Furthermore, according to the second aspect of the invention, the first transfer device can hold the door inner to perform additional stroke welding, and the door inner can be transferred to the beam insertion device to perform beam joining. It is not necessary to arrange a special jig at the station, and the equipment cost can be further reduced.Furthermore, according to the invention of claim 3, the door manufacturing process including the stiffener joining process can be arranged in an integrated manner. , improve space efficiency 2
It has the effect of

[Brief explanation of the drawing]

Fig. 1 is a plan view of an example of the device of the present invention, Fig. 2 is a plan view taken from the line ■-■ in Fig. 1, and Fig. 3 is a plan view of the tacking station seen from the direction of the arrow ■ in Fig. 2. A front view, FIG. 4 is a plan view of the beam setting jig, FIG. 5 is a left side view thereof, FIG. 6 is a sectional view taken along the line ■-■ in FIG. 4, and FIG. 7 is a cross-sectional view taken along the line ■-■ in FIG. ■Enlarged side view of the stocker for the beam setting jig seen from the line,
Fig. 8 is a plan view of the welding jig, Fig. 9 is a right side view of Fig. 8, and Fig. 10 is a front view of the stiffener coupling station seen from the X-X line in Fig. 1. X I in Figure 10
– An enlarged front view of the stocker for the stiffener gripper seen from the arrow
FIG. 15 is an enlarged plan view of the stiffener coupling station seen from line IV, and FIG.
Figure 6 is a side view of the back bar replacement device seen in the direction of arrow XVI in Figure 14, Figure 17 is a front view seen from the left side of Figure 16, and Figure 18 is a side view seen from the inch side of the door. , 1st
9 and 20 are cross-sectional views taken along lines XIX-XIX and XX-XX in FIG. 18, respectively. WI...Inner panel w2...Satush W3...
Hinge site W4... Door inner W5'... Beam W6... Outer panel W7... Stiffener W... Door... Temporary attachment station
2...Additional stroke station 3...Assembling station 4...Welding jig 5...Welding robot
6... Outer panel set jig 7... First transfer device 8... Second transfer device 7'a', -' 8a...
・Transfer jig '9゛...Beam set station 1
0...Beam injection device 10a...-Beam setting jig'11...Stiffener setting station 20
... Stiffener coupling station Figure 5 Figure 6! 10a3 0a Figure 13 Figure 11 Sweet XW Figure 15 Procedural Amendment 1989 Month Day

Claims (1)

[Scope of Claims] 1. A method for manufacturing an automobile door by assembling a door inner by joining accessory parts such as a sash to an inner panel, joining a beam to the door inner, and then assembling the door inner to an outer panel. The assembly process is divided into a temporary welding process in which the inner panel and accessory parts are temporarily attached on a welding jig, and an additional welding process in which additional strokes are welded to the door inner using a welding robot. A method for manufacturing an automobile door, characterized in that the welding robot welds the beam to the door inner. 2. In a device that manufactures automobile doors by assembling accessory parts such as a sash to an inner panel, and then assembling a beam to the door inner, and then assembling the door inner to an outer panel, the inner panel is assembled in order from the starting end. A temporary attachment station is equipped with a welding jig that supports and temporarily attaches and attached parts, an additional welding station is equipped with a welding robot, and an assembly station is equipped with an outer panel set jig that supports the outer panel. On the set line, there is a first transfer device that is equipped with a transfer jig that grips the door inner and lifts and transports the door inner from the tacking station to the reloading station, and a first transfer device that is equipped with a transfer jig that grips the door inner and transports the door inner. a second transfer device for lifting and transporting the door inner from the additional stroke station to the assembly station and assembling the door inner onto the outer panel on the setting jig, and between the additional stroke line and the beam setting station on the side thereof. Equipped with a beam injection device that can freely move back and forth,
A vehicle for use in an automobile, characterized in that a beam setting jig for holding a beam is mounted on the loading device, and a door inner can be freely transferred between the beam setting jig and the transfer jig of each of the transfer devices. Door manufacturing equipment. 3. An outer panel setting station is provided on the side of the assembly station, and a stiffener coupling station for setting and coupling a stiffener to the outer panel is provided between the two stations.
The method for manufacturing an automobile door described in .