JP2566749B2 - Multi-type production control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-type production control device, and more particularly,
For example, when performing welding on a plurality of types of workpieces that flow with a rod in an automatic welding machine, it is possible to take out a jig corresponding to the type of workpieces by specifying the welding sequence of the model in advance. The present invention relates to a multi-type production control device.

When a robot automatically attempts to weld an article, a jig is required to accurately position the article. In particular, when welding many kinds of workpieces on a single production line, it goes without saying that a jig corresponding to the kind must be prepared. Conventionally, in this type of production line, when the production of the work piece of one model is completed, once the entire line is stopped, the jig for the next model is replaced and set, and then the welding pattern for the next model is set. The welding robot was instructed to resume the work. As a result, it takes a lot of time to replace the jig, resulting in poor production efficiency and the possibility of giving wrong information to input the welding pattern corresponding to the replacement of the jig. Was also present.

Therefore, as a result of earnestly studying and devising, the present inventor temporarily stores in advance the model and quantity involved in production as information, and calls and sets a jig corresponding to a specific machining model according to this information. On the other hand, if the welding robot is configured to instruct the welding pattern according to the model information,
It has been found that a versatile production control device is obtained in which the various disadvantages mentioned above are eliminated.

Therefore, an object of the present invention is to provide a control device for producing a large number of types of articles with the capability of pre-storing the processing order for each type and specifying the jig and the welding pattern according to the order and supplying them to the processing subject. To provide a variety of production control devices.

In order to achieve the above object, in an apparatus including an automatic welding machine and a jig stocker in which a plurality of types of jigs used in the automatic welding machine are arranged to be freely transportable, a model for selecting a model of a workpiece. The selection means, the production quantity designating means for designating the production quantity of the model selected by the model selection means, the model signal from the model selection means, and the production quantity related to the model from the production quantity designating means are stored. Read out from the storage means; first detection means for identifying the type of jig in the automatic welding machine; second detection means for identifying the type of jig in the jig stocker; A first comparison circuit for sending a signal for outputting a welding pattern corresponding to the model to the automatic welding machine when the model signal corresponds to the jig type identification signal detected by the first detecting means. When the automatic welding machine completes the welding process by the production quantity according to the model read from the storage means, the next model signal read from the storage means and the stocker jig detected by the second detection means A second comparison circuit that sends an operation signal to the jig exchanging device when the type identification signal corresponds thereto.

Next, preferred embodiments of the multi-production control apparatus according to the present invention in relation to an automatic welding machine will be described in detail below with reference to the accompanying drawings.

1 and 2, reference numeral 10 indicates a welding device, and reference numeral 12 indicates a jig stocker. The welding device 10 has a setting position A for setting the work on the jig 14.
From the welding position B to the work discharge position C, a support 18 extending upward from the support 16, a shelf 20 reinforced at the upper end of the support, a shelf 20 and a support 22. A work holder 28 that moves up and down along a guide 26 under the force of a supported cylinder 24, and a welding arm 30 that constitutes the main body of the welding machine.
And The stocker 12 includes six base plates 34a to 34f supported by a pair of columns 32 so that the stocker 12 can be easily understood.
Each of the base plates 34a to 34f includes a conveyor 36 at the central portion. In the conveyor 36, a pair of rotating shafts 38, 38 are rotated by gears 40 to carry out a conveying operation as described later. On the other hand, a space is defined between the pair of base plates, and the lifting device 42 is vertically displaced in the space extending in the vertical direction. That is, the guide members 44, 44 provided at both ends of the lifting device 42 are engaged with the chains 46, 46 extending along the columns 32, 32, and the chains 46, 46 are
Engages with sprockets 48, 48 rotatably supported on the upper end and the lower end of the column 32. Particularly, the lower sprocket 48 is connected to the motor 50 via the belt 52.

As is clear from FIG. 3, the lifting device 42 includes a conveyor and a motor that drives the conveyor. That is, the drive shaft 58 of the motor 56 is connected to the rotary shaft 66 by the sprocket 60, the chain 62 and the sprocket 64, or is connected to the rotary shaft 74 via the sprocket 68, the chain 70 and the sprocket 72 mounted on the rotary shaft 66. Be connected. A rotary drum 67 is attached to the end of the rotary shaft 66,
A different rotating drum 75 is attached to the end of the rotating shaft 74.
The rotating drums 67 and 75 are in contact with the inside of the conveyor 54. Furthermore, a gear 76 is attached to the rotary shaft 66, and the gear 76 meshes with the gear 40. On the other hand, the automatic switching operation of the arm 78 releases the mesh with the gear 40 so that the base plate on the other side is released. It is also possible to mesh with a gear (not shown). This means that under the switching control of the arm 78, the conveyor of either one of the base plates on the same plane can be driven under the action of the gear. In this way, in the device of the present invention, the base plate 34a to 34f including the conveyor 36 that moves in the horizontal direction and the elevating device 42 constitute a jig changing device in the stocker.

Next, in the jig storage spaces A to F defined by the base plates 34a to 34f as described above, one end of the belt conveyor 80 faces the jig storage space E and the other end of the conveyor 80 is exposed. The side extends to the vicinity of the pillar 18. The belt conveyor
A belt 84 is suspended on a pulley 82 mounted on a rotary shaft of 80, and the other end side of the belt 84 is a rotary drive shaft of a motor 86.
It is engaged with 88.

Next, the control system of the automatic welding machine provided with the stocker configured as above will be described with reference to FIG.

The output side of the model designation switch 90 is connected to the first register 92, and the output side of the production quantity designation switch 94 is connected to the second register 96. The output side of the first register 92 is connected to the first comparison circuit 98 and the second comparison circuit 100, while the output side of the second register 96 is connected to the counter 10.
Connected to 2 inputs. The output side of the counter 102 is
It is connected to the first register 92, the second register 96, the jig exchange sequence circuit 104 in the welding machine, and the comparison circuit 100. Sensors 106a, 10 arranged close to the jig 14 in the welding device 10
The model code conversion circuit 108 is on the output side of 6b, 106c, and 106d.
The output side of the model code conversion circuit 108 is connected to the comparison circuit 98. One output side of the comparison circuit 98 is connected to the production operation sequence circuit 110 of the welding apparatus 10 and the other output side is connected to the alarm device 112, and its output is also input to the production operation sequence circuit 110. Connected to. Production operation sequence circuit 11
0 is further connected to the controller 114 of the welding device 10. The output side of the comparison circuit 98 is also connected to the controller 114.

Next, the output side of the second comparison circuit 100 is connected to the base plate operation sequence circuit 116 that constitutes the jig exchange device in the stocker, and this base operation sequence circuit 116 similarly moves up and down that constitutes the jig exchange device. It is connected to the device operation sequence circuit 118.

The output sides of the sensors 120a, 120b, and 120c that determine the model of the jig 14 on the lifting device 42 that moves the jig stocker 12 up and down are connected to the jig code conversion unit 122, and the jig code conversion unit 122 The output side is connected to one input terminal of the on-stocker jig number storage circuit 126 via the jig number storage unit 124. On the other hand, each jig of the base plates 34a and 34f on the stocker
The output side of the sensors 128a to 128e for discriminating 14 is connected to the jig storage stocker selection circuit 130, and one output side of this selection circuit 130 is connected to the above stocker jig number storage circuit 126, and is also selected. The other output side of the circuit 130 is connected to the input side of the base plate operation sequence circuit 116. The output side of the stocker upper jig number storage circuit 126 is the second comparison circuit 1
It is connected to 00. In the figure, reference numeral 132 is the first
This is a push button for setting and storing the upper input in the register 92 and the second register 96.

The multi-production control apparatus according to the present invention is basically constructed as described above, and its operation and effect will be described below with reference to the flow chart shown in FIG.

First, for example, when the model and quantity related to daily production are determined, the welding device 10 is operated, and then the model designation switch 90 and the production quantity designation switch 94 are turned on (STP
1, STP2). That is, when the production order of the model is confirmed, the first model is selected by the model designating switch 90, is stored in the first register 92 by pressing the push button 132, and then the second model is produced by the model designating switch 90. All production models are selected and stored in the register 92 in the model selection order of the model designating switch 90 so that they are stored in the register 92 when the push button 132 is pressed.

Then, a production quantity for each model is selected by the production quantity designating switch 94 in the order of the production model, and the push button 132 is pressed one by one to store the production quantity in the second register 96. The production quantity for each model is counter 102
Is output as a signal to.

Jig for the model specified in advance at welding position B
Assuming that 14 existed, this jig 14 model is dog 14
This dog 14a is connected to the sensor 106a through
Read at 106d. This model information is the model code conversion unit 108
And is introduced into the first comparison circuit 98. On the other hand, since the model signal selected first from the first register 92 is also introduced to the first comparison circuit 98, this circuit is also selected.
In 98, it is compared whether or not the type of work to be produced first and the jig 14 are compatible (STP3), and if both are compatible, the production operation sequence circuit 110 in the welding device is activated (STP3).
TP4), on the other hand, if the two do not match, the alarm device 112 issues a predetermined alarm signal. In this case, it goes without saying that the production operation sequence circuit 110 is not activated (STP
5, STP6).

Therefore, when the selected model and the jig 14 match, the production operation sequence circuit 110 is activated and the model designation switch 9
Production of the specific model selected by 0 and stored in the first register 92 is started (STP1). That is, the jig 14 moves to the set position A and a work (not shown) is placed on the jig.
Is placed and the welding position B is returned to again. When the cylinder 24 descends and the work retainer 28 firmly positions the work on the jig 14, the arc is blown from the welding torch at the tip of the welding arm 30 and the welding process is performed according to the specified pattern at a predetermined position. . The welded work is moved to the payout position C together with the jig 14, and the jig 14 is moved to the set position A after the work is paid out. At this time, the production operation sequence circuit 110 outputs a signal to the counter 102 to reduce the production amount of the work of the specific model set in the counter 102 by one via the second register 96 by one. At this time, there is no output from the counter 102 to the jig exchange operation sequence circuit 104 in the welding machine.

In this way, the production operation sequence circuit 110 performs the welding process on the work of one selected specific model one after another, and the counter 102 sequentially subtracts the number of processed products.
Then, when the welding process for the set number of production ends (STP7), the counter 102 outputs a jig exchange signal to the jig exchange operation sequence circuit 104 in the welder (STP8, STP9).
Further, the counter 102 supplies signals to the first register 92 and the second register 96, derives a model signal for the next production and a signal for the production quantity from the respective registers 92, 96, and the former signal is the first signal. 2 Introduced into the comparison circuit 100,
The latter signal is introduced into the counter 102 and set.

By the way, in the jig stocker 12, the jig 14 on the lifting device 42 is constantly monitored by the sensors 120a to 120c, and the jig 14 is coded by the jig code conversion unit 122. on the other hand,
In the jig stocker 12, all the jigs on the base plate 34 are detected by the sensors 128a to 128e, and the signals thereof are introduced into the jig storage stocker selection circuit 130. A signal output from the jig storage stocker selection circuit 130 and the jig number storage unit 124
Signal is introduced into the stocker jig number storage circuit 126. That is, the jigs 14 on the lifting device 42 and the jigs 14 on the jig stocker 12 are stored in the jig number storage circuit 126 by the sensors 120a to 120c and the sensors 128a to 128e in a correlation between their types and locations. It is the second comparison circuit 1
Introduced in 00. Therefore, the signal related to the next production model is introduced from the first register 92 to the second comparison circuit 100, while the signal from the jig number storage circuit 126 is supplied to the second comparison circuit 100.
It is introduced into the comparison circuit 100. Therefore, the comparison circuit 100 assumes that the output signal from the counter 102 is present and when the two signals match, the jig 14 and the stocker 12 of the next specific model
The upper position is supplied to the operation sequence circuit 116 to energize it and the hoisting device operation sequence circuit 118 in the jig exchanging device is energized (STP10, STP11, STP12). That is, specifically, the base plate operation sequence circuit 116 and the lifting / lowering device operation sequence circuit 118 drive the motors 50 and 56 to drive the conveyor 36 of the base plate 34 and the jig related to the next model on the conveyor. Move 14 in the spatial direction. Then, by re-energizing the lifting / lowering device operation sequence circuit 118, the chain 46 is rotated under the drive of the motor 50 to lower the lifting / lowering device 42 again. At this point, the lifting device replacement operation sequence circuit 118 is the welding jig replacement operation sequence circuit 1
A signal indicating that the jig exchange in the jig exchange device is completed is output to 04. As a result, the sequence circuit 104 is energized, the motor 86 is driven, and the new jig 14 is received by the conveyor 80 (STP13), and the jig 14 is positioned at the welding position B. Sensors 106a to 106d are jigs for the next model
The signal relating to 14 is detected, coded by the model code conversion unit 108, and then sent to the first comparison circuit 98. The first comparison circuit
Since the signal related to the next production model from the first register 92 is introduced in 98, when both signals match, the welding device 10
The production operation sequence circuit 110 is activated to start the welding process for a new model. At this time, if the first comparison circuit 98 sends a signal to the controller 114 indicating that the next production model is ready, the controller 114 responds to the production operation sequence circuit 110 with the relevant model. Given the welding pattern information, the welding arm 30 restarts the welding operation according to the pattern.

In the first comparison circuit 98, when the signal sent from the model code conversion unit 108 and the signal sent from the first register 92 do not match, there is a new set error of the jig 14. Of course, this is signaled by the alarm device 112 and the production operating sequence circuit 110 is deactivated.

According to the multi-production control apparatus of the present invention, since the production model and production quantity are stored in the storage means, jigs and welding patterns suitable for the model are automatically set. Therefore, different types of automatic welding machines can be efficiently produced on the same production line. In addition, when changing the production model, the second comparison circuit selects the jig corresponding to the next production model from the inside of the stocker, and the type of the jig to be transferred to the automatic welding machine is determined by the first comparison circuit. After confirming and sending a signal to output the welding pattern to the automatic welding machine, it is possible to reliably prevent welding according to the welding pattern even if the correct jig corresponding to the production model has not arrived. To do. Therefore, the concern about the occurrence of defective products can be eliminated.

Although the present invention has been described with reference to the preferred embodiment, the present invention is not limited to this embodiment, and various improvements and design changes can be made without departing from the scope of the invention. Is.

[Brief description of drawings]

FIG. 1 is a front view of a welding device incorporating the device in the present invention,
2 is a side view of the welding apparatus shown in FIG. 1, and FIG.
1 and 2 are plan views of a jig exchanging device which constitutes the welding device shown in FIGS. 1 and 2, FIG. 4 is a block circuit diagram of the present invention device, and FIG. 5 is a flow chart diagram showing an operating process of the present invention device. Is. 10 …… Welding device, 12 …… Jig stocker 14 …… Jig, 16 …… Base 18 …… Support, 20 …… Shelf 22 …… Support, 24 …… Cylinder 26 …… Guide, 28 …… Work holder 30 …… Welding arm, 32 …… Staff 34 …… Base plate, 36 …… Conveyor 38 …… Rotary shaft, 40 …… Gear 42 …… Elevating device, 44 …… Guide member 46 …… Chain, 48… … Sprocket 50 …… Motor, 52 …… Belt 54 …… Conveyor, 56 …… Motor 58 …… Rotating drive shaft, 60 …… Sprocket 62 …… Chain, 64 …… Sprocket 66 …… Rotating shaft, 67 …… Rotating Drum 68 …… sprocket, 70 …… chain 72 …… sprocket, 74 …… rotating shaft 75 …… rotating drum, 76 …… gear 78 …… arm, 80 …… belt conveyor 82 …… pulley, 84 …… belt 86 ...... Motor, 88 …… Rotary drive shaft 90 …… Model designation switch, 92 …… First register 94 …… Production quantity designation switch Switch 96 …… Second register, 98 …… First comparison circuit 100 …… Second comparison circuit, 102 …… Counter 104 …… In-welder jig replacement sequence circuit 106 …… Sensor 108 …… Model code conversion circuit 110 ...... Production operation sequence circuit 112 …… Alarm device, 114 …… Controller 116 …… Base plate operation sequence circuit 118 …… Elevating device operation sequence circuit 120 …… Sensor, 122 …… Jig code conversion unit 124 …… Jig Number storage unit 126 …… Jig number storage circuit on stocker 128 …… Sensor 130 …… Jig storage stocker selection circuit 132 …… Push button

Continuation of the front page (56) Reference JP-A-58-29576 (JP, A) JP-A-53-32483 (JP, A) JP-A-56-82190 (JP, A) JP-A-56-102444 (JP , A) JP 54-75686 (JP, A) JP 58-114846 (JP, A) JP 51-104678 (JP, A) JP 58-211848 (JP, A) 58-67640 (JP, U)

Claims (2)

(57) [Claims] 1. An apparatus including an automatic welding machine and a jig stocker in which a plurality of types of jigs used in the automatic welding machine are arranged so as to be transported, and model selection means for selecting a model of a workpiece. Production quantity designating means for designating the production quantity of the model selected by the model selecting means, and storage means for storing a model signal from the model selecting means and a production quantity for the model from the production quantity designating means A first detection means for identifying the type of jig in the automatic welding machine, a second detection means for identifying the type of jig in the jig stocker, a model signal read from the storage means, and A first comparison circuit for sending to the automatic welding machine a signal for outputting a welding pattern corresponding to the model when the jig type identification signal detected by the first detection means corresponds to the jig type identification signal; When the automatic welding machine completes the welding process by the production quantity of the model read from the following, the next model signal read from the storage means and the jig type identification signal in the stocker detected by the second detection means And a second comparison circuit that sends an operation signal to the jig exchanging device when the above corresponds. 2. The device according to claim 1, wherein
A counter is connected to the storage means, and the counter sends a signal to the automatic welding machine to stop the operation of the automatic welding machine when the automatic welding machine completes the welding process of a predetermined model by the production quantity. A multi-purpose production control device that sends a jig exchange signal to the jig exchange device when the next production model has been selected.