JPH0234283A - Working device for work - Google Patents

Abstract

PURPOSE:To improve manufacturing efficiency of works by reciprocating first and second jig bases connected to each other between first and second respective states and arranging working robot end work transfer means to the vicinity of the work working position. CONSTITUTION:A jig mobile means 13 to reciprocate the first jig base 1 and the second jig base 3 connected by a connecting means 2 between the first state and the second state is arranged. When the jig bases 1 and 3 are located at the sending-in position 4 and the working position 5 in the first state, the work 7 on the jig base 3 is subjected to welding work by the welding robot 8 and the work 7 is sent-in onto the jig base 1. In the second state, welding is performed by the robot 8 at the working position 5 and the work 7 whose working is finished is sent out at the sending-out position 6. Since different work can be always carried out at the same time on the two works 7, the manufacturing time per work is reduced. Accordingly, manufacturing efficiency of the works 7 is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a method for handling the workpiece placed on the jig table while the jig table is being transported from the workpiece loading position to the workpiece transfer position. The present invention relates to a working device for a work that performs a predetermined work.

(Prior Art) In recent years, in the manufacturing and assembly process of pillars, work devices have been used in which workpieces (hereinafter referred to as workpieces) transported by a transport means are processed one after another by an industrial robot. For example, in an automobile floor panel assembly process, the workpiece is placed on a jig stand at the workpiece loading position, the jig stand is transported to the workpiece work position, a welding robot performs the specified welding work, and then the jig stand A working device is known that transports a workpiece to a workpiece unloading position and unloads the workpiece from a jig table.

(Problem to be Solved by the Invention) However, with some of the above-mentioned work devices, it is not possible to carry in the next work until the workpiece that has finished welding is completely removed from the work device, which poses a problem in terms of work efficiency. there were.

The present invention was made in order to solve such problems, and an object of the present invention is to provide a workpiece working device that can improve the overall efficiency of carrying in, processing, and carrying out workpieces. be.

(Means for Solving the Problems) A working device for a work according to the present invention synchronizes a first and a second jig stand, and reciprocates between the first state and the second state by means of moving the jig stand. It was made to move,
When in the first state, the first jig stand is arranged at the workpiece loading position and the second jig stand is arranged at the workpiece work position,
When in the second state, the first jig stand is arranged at the workpiece work position and the second jig stand is arranged at the workpiece unloading position,
A work robot placed near the workpiece work position performs a predetermined work on the workpiece placed on the jig stand at the workpiece work position, and performs a predetermined work on the workpiece on the first jig stand in the second state. After the pre-process of the predetermined work is completed, this work is removed by a work transfer means placed near the work work position and transferred to the second jig stand in the first state, and then the predetermined work is carried out. It is characterized by performing post-processes of the work.

(Function) According to the above configuration, the two jig stands are reciprocated in conjunction with each other, and the pre-process of a predetermined work is performed on the first jig stand in the second state. Post-processing is performed on the second jig stand in the first state, so that when one jig stand is placed at the workpiece work position, the other jig stand is in the first state. The workpiece is placed at the workpiece loading position, and in the second state, the workpiece is placed at the workpiece unloading position. Therefore, while performing a predetermined work on a workpiece on one jig table, it is possible to carry the workpiece into or out of the other jig table at the same time. It becomes possible to shorten the manufacturing time per workpiece.

That is, the workpiece is carried into the first jig stand in the first state, and then the two jig stands are transferred to the second state and placed on the first jig stand. A pre-process of a predetermined operation is performed on the workpiece, and after this, the workpiece is removed from the first jig stand and held in the workpiece transfer means, and the two jig stands are in the first state. The workpiece held by the workpiece transfer means is placed on the second jig table in this first state, and the post-process of the predetermined work is performed. The two jig tables are transferred to the second state, and the workpiece that has been subjected to a predetermined work is carried out from the second jig table. Therefore, if the workpiece that is currently being worked on is workpiece B, and the workpieces to be carried in before and after workpiece B are workpiece A and workpiece C, respectively, then workpiece B is placed on the first jig stand. While the work is being carried in, a predetermined post-process for workpiece A is being performed on the second jig table, and a predetermined pre-process for workpiece B is being performed on the first jig table. In the meantime, the work A is carried out from the second jig table, and the work C is carried in while the post-process of the predetermined work is being performed on the second jig table for the work B. ,
While workpiece B is being carried out from the second jig stand, the pre-process for the predetermined work on workpiece C will be done, so different work is always done on the two workpieces at the same time. It becomes possible to reduce the manufacturing time for one workpiece, thereby improving manufacturing efficiency.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic plan view showing a working position with respect to a workpiece according to an embodiment of the present invention. Note that the workpiece in this example is a floor panel of an automobile.

This working device includes a first jig table 1, a second jig table 3 connected to the first jig table by a connecting means 2, and a first state of the two jig tables 1.3. and a second state. The first state refers to a state in which the first jig table 1 is at the workpiece loading position 4 and the second jig table 3 is at the workpiece work position 5. Topping stand 1
is at the workpiece work position 5 and the second jig table 3 is at the workpiece unloading position 6. This work device also includes a welding robot 8 that performs a predetermined welding operation on the workpiece 7 on the jig table, and a welding robot 8 that is placed on both sides of the workpiece work position 5, and further mounted on the first jig table 1 in the second state. A workpiece transfer means 9 is provided for removing the placed workpiece 7 and transferring it to the second jig stand 3 in the first state.

Next, the operation of this working device will be explained using FIG. 2.

First, set the two jig tables 1 and 3 in the first state, and
The workpiece 7 is carried into the jig table 1 (FIG. 2(a)). At this time, on the second jig table 3, the welding robot 8 performs additional welding on the previously loaded workpiece. After this, the two jig stands 1 and 3 are moved to the jig stand moving means 13.
The welding robot 8 performs temporary welding on the workpiece 7 on the first jig table 1 (FIG. 2(b)). At this time, the second jig stand 3 is arranged at the carry-out position 6, and the work carried in immediately before the work 7 is carried out from this jig stand 3. When the temporary welding of the workpiece 7 is completed, the workpiece 7 is lifted upward by the workpiece transfer means 9, and at the same time, the two jig tables 1.3 are moved by the jig table moving means 13 and the workpiece 7 is moved upward by the workpiece transfer means 9. 1, and after that, the workpiece 7 that had been lifted upward by the workpiece transfer means 9 is lowered onto the second jig table 3, where it is welded by the welding robot 8. Drop welding is performed (FIG. 2(C)). At this time, the first jig table 1 is arranged at the carry-in position 4, and the workpiece next to the workpiece 7 is carried into this jig table 3. Thereafter, the two jig tables 1 and 3 are moved by the jig table moving means 13 and set in the second state (Fig. 2(d)'), and the workpiece 7 is moved from above the second jig table 3. is carried out, and the welding work on the workpiece 7 is completed. At this time, the first jig table 1 is arranged at the working position 5, and on this first jig table 1, temporary welding is performed on the workpiece carried in after the workpiece 7. In this way, the apparatus of this embodiment is configured such that workpieces are placed on the first jig stand 1 and the second jig stand 3, respectively, and different operations are performed on each workpiece at the same time. This makes it possible to improve work efficiency.

FIG. 3 is a side view showing the two jig stands 1 and 3 shown in FIG. 1 together with the jig stand moving means 13. Each jig stand 1, 3 has four wheels IO at its lower part, and each wheel IO
has grooves for engaging with the two left and right rails 11. Moreover, on the top of each jig stand 1, 3, there is a workpiece 7.7.
A plurality of workpiece support columns 12 are arranged to support the back electrode 14 from below the workpiece 7.
The structure makes it easy to insert items such as These two jig stands 1.3 are connected by a connecting means 2, and the second jig stand 3 is connected to a piston in a cylinder, which is a jig stand moving means 13. Along with the reciprocating movement, the two jig stands 1.3 reciprocate between the first state and the second state.

Note that the jig table moving means 13 is not limited to mechanical drive means such as the cylinder 13 described above; for example, the jig tables 1 and 3 are equipped with electric motors that drive the wheels 10, and the input to this electric motor is It is also possible to use an electric moving means that controls the movement of the jig stands 1 and 3 by controlling the drive current.

FIG. 4 is a schematic diagram for explaining the operations of the welding robot 8 and the workpiece transfer means 9 when the jig tables 1 and 3 are placed at the workpiece work position 5.

When the two jig stands 1 and 3 are set in the second state described above and the first jig stand 1 is placed at the workpiece work position 5, the back electrode 14 is inserted into the lower center of the workpiece 7. At the same time, a stat gun 1 corresponding to the "arm" of the welding robot 8
9 is moved to the upper center of the workpiece 7 and temporary welding is performed. This stat gun is rotatable around a rotating shaft portion 20, and an electrode portion disposed at its tip is connected to a workpiece 7.
The structure is such that it can appropriately come into contact with any curved surface part. As shown in FIG. 4, the two members 7b and 7c constituting the workpiece 7 are held between the electrode of the stat gun 19 and the electrode portion of the back electrode 14, and in this state, the electrodes of the stat gun 19 are connected to the back electrode 14. A pulse current flows through the portion to temporarily weld the two members 7b and 7c. When the temporary welding is completed in this way, the stud gun 19 retreats to the side of the jig table 1, and both ends of the workpiece 7 are gripped by the clampers 21 of the workpiece transfer means 9.

As shown in FIG. 4, this clamper 21 consists of two arms that clamp the workpiece 7 in the vertical direction. A pinion 22 supported by a rotating shaft is attached to the other end of each arm, and a rack 23 that meshes with these pinions 22 is arranged between the two pinions 22.

The rack 23 is connected to the piston of the clamping cylinder 24 and is configured to reciprocate in the width direction of the workpiece as the piston reciprocates, and the reciprocating movement of the rack 23 causes a pinion to engage with the rack 23. 22 rotates to open and close the arm. When the workpiece 7 is completely gripped by the clamper 21, the piston in the lift cylinder 25 rises, which causes the workpiece gripping part 26 connected to this piston to rise, and the workpiece 7
is lifted up to the dotted line in Figure 4 while being held by the arm.

While the workpiece 7 is held in this state, the two jig stands 1 and 3 are set in the first state, and the second jig stand 3 is placed at the workpiece work position 5. After this, the piston of the lift cylinder 25 descends, and this causes the work gripping portion 2G to
is lowered, and the workpiece 7 is placed on the workpiece support column 1 of the second jig table 3.
2. Along with this, the clamp cylinder 2
4, the arm of the clamper 21 releases its grip on the workpiece 7.

Thereafter, additional welding is performed on the workpiece 7 by the welding robot 8. This additional welding is different from the above-mentioned tack welding in the welding position of the workpiece 7, but is otherwise performed by substantially the same operation as the tack welding. In addition, in Figure 1,
. drawn on the workpiece 7 indicates an example of a position for temporary welding, and O indicates an example of a position for additional welding. Incidentally, the clamper 21 described above can be configured to always grip the workpiece 7 while the workpiece 7 is placed on the jig table 1.3. Note that the workpiece transfer means is not limited to that of the embodiment described above, and may be used to securely hold the workpiece 7 and transfer it from the first jig stand 1 to the second jig stand 3. Any configuration is possible as long as it is possible.

In addition, in the above-mentioned embodiment, temporary welding is performed as a pre-process,
Although additional welding is referred to as a post-process, the terms "pre-process" and "post-process" used in the present invention do not necessarily have to be clearly distinguished as in this embodiment, and the first half of one operation is referred to as "pre-process" and "post-process". It is also possible to make the latter half a post-process.

(Effects of the Invention) As described above in detail, according to the work device for the work of the present invention, the two jig stands are reciprocated in conjunction with each other,
By dividing a given work into two processes and adding an operation between these two processes to transfer the workpiece from the first jig stand to the second jig stand, the workpiece can be moved on one jig stand. Load the work to the other jig table at the same time as performing the specified work.

Able to carry out unloading work. Conventionally, after a workpiece is loaded onto a jig table, a predetermined operation is performed on the workpiece, and other workpieces are then loaded onto the jig table until the workpiece that has been completed is removed from the jig table. However, the device of the present invention can accommodate two workpieces at the same time, and can perform different operations on the two accommodated workpieces at the same time. This makes it possible to shorten the manufacturing time per workpiece and improve manufacturing efficiency.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view showing a working device for a work according to an embodiment of the present invention, FIG. 2 is a schematic diagram for explaining the operation of the working device shown in FIG. 1, and FIG. 3 is the same as that shown in FIG. FIG. 4 is a side view showing two jig stands shown together with an example of a jig stand moving means, and FIG. 4 is a front view showing details of the jig stand, welding robot, and work transfer means shown in FIG. 1. 1... First jig stand 2... Connecting means 3...
Second jig stand 4...Work loading position 5...Work working position 7, 7a...Work 9...Work transfer means 14...Back electrode 6...Work carrying out position 8... ...Welding robot I3...Jig table moving means 19...Stat gun

Claims (1)

[Claims] First and second jig stands, and a first state in which the first jig stand is placed at the workpiece loading position and the second jig stand is placed at the workpiece work position. , this first
These two jig stands are placed in the workpiece work position and the second jig stand is placed in the workpiece unloading position.
a jig stand moving means for reciprocating two jig stands in conjunction with each other; and a work robot disposed near the workpiece work position to perform a predetermined work on the workpiece placed on the jig stand. , After a pre-process of a predetermined operation is completed for the workpiece placed near the workpiece work position and on the first jig stand in the second state, the workpiece is removed from the first jig stand. A working device for a workpiece, comprising: a workpiece transfer means for removing and transferring the workpiece onto the second jig stand in the first state.