JP3642549B2 - Feed monitoring device for press machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a feed monitor device for a press machine having a sensor that determines whether or not fingers corresponding to each stage provided on a feed bar for workpiece conveyance have gripped the workpiece normally, and conveys the workpiece as it is. Even if it is used to divide into 2 parts, 4 parts, etc. in the middle of processing, the press machine can be stopped when the work is in the state of tooth removal and the press machine continues to operate or abnormal. There is an effect to say.
[0002]
[Prior art]
As a feed monitor device for a press machine, for example, there is one shown in FIG.
In FIG. 3, in the transfer feeder S, the material T in each stage 1 to 7 is sent to the next process for each cycle of clamp V, feed W, unclamp X, and return Y.
While the material T in the stage 1 and the stage 5 is sent to the next stage, the presence or absence of the passage detection devices K and L is detected. If there is, the misgrip detection in the stage 2 and the stage 6 is detected. The devices MG1 and MG3 operate normally, and the material T is sent to the press machine P1 and the press machine P2, and is detected again by the misgrip detection devices MG2 and MG4 at that position, and then pressed.
The detection signals of the detection devices K, L, MG3, MG2 and MG4 are reset signals for each cycle of the feeder S. When the detection device for the next stage is present, the detection signal is valid. A misgrip detection signal is transmitted from the detection device to stop the press machine.
[0003]
[Problems to be solved by the invention]
The press monitor apparatus shown in FIG. 3 can cope with the press work by the single article conveyance method in which the work that has been carried in is not divided and is conveyed sequentially to the next process by the feed bar. However, when the stage in the middle of the workpiece conveyance includes a mold that divides the workpiece into two parts, four parts, etc., a misgrip detection device provided on the feed bar of the transfer feeder S such as the above-mentioned MG1 to 4, In other words, it is necessary to rearrange or add sensors, and to provide a dedicated control circuit each time, which requires a lot of time for preparatory work before pressing.
[0004]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a feed monitor device for a press machine that can cope with both a single product conveyance system and a divided conveyance system by simply setting data.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a single item transfer method in which workpieces that are carried one by one to the feed bar are sequentially conveyed to the next process by the feed bar, and a plurality of workpieces that are carried in a plurality of arbitrary stages. A timing cam output device that provides a plurality of fingers and sensors that can be used in a divided conveyance system in which the feed bar is sequentially conveyed to the next process using a feed bar, and transmits a timing signal during the advance operation for each cycle of feed bar conveyance Is provided.
A misgrip control unit is provided corresponding to each stage, and a stage data input means for inputting and setting data necessary for the stage is provided in the misgrip control unit of each stage.
There is provided a misgrip abnormal stop output device for inputting a misgrip signal transmitted from any of the misgrip control units and transmitting a stop signal for the press machine.
[0006]
Each misgrip control unit has a usage setting unit for setting the use / non-use of a plurality of sensors of the stage from the stage data input means, and a pattern for setting the number of workpiece divisions from the stage data input means From the setting device and the stage data input means, input the data set in the monitor setting device that sets the use / non-use of the stage and the presence or absence of tooth removal operation, the use setting device and the pattern setting device. Based on the data, the workpiece presence / absence check device that checks the detection signals input from a plurality of sensors at the stage to determine the presence / absence of the workpiece and outputs the workpiece, and receives and stores the output of the workpiece presence / absence check device, and the timing cam output device Set to the work presence / absence storage device that outputs to the next stage with the timing signal, pattern setter and monitor setter Enter the data, based on this data, checks the input from the work whether the storage device of a work existence check unit and the previous stage by the timing signal of said timing cam output device, mistakes when these work whether no sign A misgrip judging device for judging a grip and transmitting a misgrip signal is provided.
[0007]
As described above, work can be performed with a feed bar having a finger and a misgrip detection sensor corresponding to each stage, which can be applied to both the single item conveyance method and the division conveyance method by simply setting the required data with the stage data input means. The feed monitor device of the press machine that performs the press working by sequentially transporting to each stage is configured.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show an embodiment of a feed monitor device for a press machine according to the present invention.
FIG. 1 shows a configuration diagram of a feed monitor apparatus that can correspond to any one of the single item conveyance method shown in FIG. 2A and the divided conveyance method shown in FIG.
[0009]
In FIG. 1, the feed monitor device 17 includes stage data for setting required data for each stage in the misgrip control unit 1 corresponding to the number of stages of the press machine and the idle stages, and the misgrip control unit 1 corresponding to each stage. A timing cam output device 3 for transmitting a timing signal corresponding to a crank angle of a press machine or a rotation angle of a feed bar drive device in order for the input means 2 and the misgrip control unit 1 to make a misgrip determination; The control unit 1 is configured to include a misgrip abnormal stop output device 4 that receives a misgrip signal that is transmitted when it is determined to be a misgrip and transmits a stop signal for suddenly stopping the press machine.
[0010]
Each stage's misgrip control unit 1 includes four sensors 10 for detecting a workpiece presence signal when a finger of a corresponding stage provided on a feed bar, which will be described later, grips the workpiece, and a stage data. A usage setting unit 11 for setting the use / non-use of each of the four sensors 10 from the input means 2 and a pattern for setting a division number such as no division, two divisions, or four divisions as a division pattern of the workpiece. A setter 12, a monitor setter 13 for setting the use / non-use of the stage and the presence / absence of a tooth removal operation, and a work presence / absence check device for processing inputs from these sensors 10 and the respective setters 11 and 12 14, miss the gripping judgment apparatus 15 and the workpiece presence to process input from the work presence check device 14 and the setter 12, 13 Stores the Ekku device (14) was determined to constitute a workpiece presence storage device 16 for transmitting the presence or absence of the workpiece to miss the grip control unit of the next step (1).
[0011]
If there is no division in the pattern setting unit 12, the workpiece presence / absence check device 14 determines that there is a workpiece if there is one or more inputs from the sensor 10.
Further, when the left and right division is set, if one of the two sensors 10 before and after the feed direction of the feed bar is transmitting, it is determined that there is a work.
Furthermore, if four divisions are set for the front, rear, left and right, the four sensors 10 independently determine the presence or absence of a workpiece.
[0012]
The workpiece presence / absence storage device 16 receives and stores the workpiece presence / absence judgment of the workpiece presence / absence check device 14, and receives the timing signal of the timing cam output device 3 transmitted in the advance operation of the next feed bar, and stores the stored contents. It is transmitted to the misgrip control unit 1 of the next stage and then reset.
[0013]
When the non-use is set by the monitor setting device 13, the misgrip determination device 15 determines that the workpiece is normal when the workpiece presence check device 14 determines that there is no workpiece. When the monitor setter 13 is set to be used and no tooth-pull operation is performed, it is determined that the workpiece is normal when the workpiece presence / absence check device 14 is input by the timing signal of the timing cam output device 3.
Furthermore, when the monitor setting unit 13 is set to use and the tooth removal operation is set, the presence / absence of a workpiece is input from the workpiece presence / absence storage device 16 of the previous stage by a timing signal, and the workpiece presence / absence check device 14 has a workpiece. Is entered as normal, and conversely, it is judged as normal when no workpiece is entered in the workpiece presence / absence storage device 16 in the previous stage and the workpiece presence / absence check device 14 is also entered.
[0014]
Further, the misgrip determination device 15 applies a weight to the pattern setting device 12 described above, and transmits a misgrip signal when it is determined to be abnormal.
Therefore, even if there are two-part and four-part dies on the stage in the middle of conveyance, various data can be obtained simply by inputting data from the stage data input means 2 and setting required conditions in the setting units 11, 12 and 13. It is possible to judge a misgrip in workpiece conveyance and stop the press machine.
Since the work is supplied to the first stage and the misgrip determination can be made directly, the misgrip control unit 1 of this stage does not need a signal from the work presence / absence storage device of the previous stage.
[0015]
FIG. 2 (a) shows a single-item conveying system. When the fingers 19 and 19 and the feed bars 18 and 18 are clamped so that the feed bars 18 and 18 approach each other, the fingers 19 are moved to the feed bars 18 and 18, respectively. , 19 is provided with a sensor 10 for detecting that the workpiece 20 is clamped.
The sensor 10 is provided in each finger 19.
If the fingers 19 and 19 of each stage detect that the workpiece 20 is clamped and the sensor 10 is clamped, it is determined that there is an abnormality when the conveyance is performed normally and no detection signal is output at any of the stages. To do.
[0016]
FIG. 2 (b) shows a case in which there is a mold that performs four-division in the final sixth stage in the divided conveyance method, but each stage can be handled regardless of whether it is divided into two or four. Two fingers 19 for each feed bar 18 and four fingers 19 on both sides are opposed to the stage so that the stage can be divided into four, and a sensor 10 is provided for each finger 19.
[0017]
2 (a) and 2 (b), the feed bars 18 and 18 are clamped to approach each other, advanced to transport the workpiece 20 to the next stage, and unclamped to place the workpiece 20 on the transported stage. The return operation to return to the original stage is performed as one cycle, and this is repeated.
An arrow indicates an example of a transmission path of a detection signal of the sensor 10.
[0018]
【The invention's effect】
As is apparent from the above description, according to the present invention, it is possible to easily cope with both the single item conveyance method and the divided conveyance method by simply setting the required data from the stage data input means provided on the operation panel of the press machine. The load on the worker can be reduced and the working efficiency can be improved.
[Brief description of the drawings]
FIG. 1 is a block diagram of a control circuit of a feed monitor device for a press machine in an embodiment of the present invention. FIG. 2 (a) is a plan view of a single article conveying system of a feed bar of the press machine. Plan view of split feed system of feed bar [Fig. 3] Illustration of conventional example [Explanation of symbols]
1 is a misgrip control unit, 2 is a stage data input means, 3 is a timing cam output device, 4 is a misgrip abnormal stop output device, 10 is a sensor, 11 is a use setting device, 12 is a pattern setting device, and 13 is a monitor setting. , 14 is a work presence / absence check device, 15 is a misgrip determination device, 16 is a work presence / absence storage device, 17 is a feed monitor device, 18 is a feed bar, 19 is a finger, and 20 is a work.

Claims (2)

In feed monitoring apparatus of a press machine having a transfer feeder, the number of stages of the press machine and the idle stage component is provided with a plurality of sensors (10) for detecting the presence or absence of a workpiece in a stage divided processed by a press machine The misgrip control unit (1) for judging the misgrip by inputting the signal of the sensor (10), the stage data and the timing signal, and setting the required stage data in the misgrip control unit (1). A stage data input means (2), a timing cam output device (3) for transmitting the timing signal for the misgrip control unit (1) to make a misgrip determination, and the misgrip control unit (1) A misgrind that sends a sudden stop signal to the press when it is judged as a grip. Press machine feed monitoring apparatus characterized by having flop abnormal stop output unit (4), a. The miss grip control unit (1) includes a use setting unit (11) for setting the use / nonuse of the sensor (10), the pattern setting unit for setting a workpiece division pattern (12), the use of the stage / Monitor setting device (13) for setting whether or not to use and tooth removal operation, and presence / absence of workpiece for judging presence / absence of workpiece in finger based on data set in pattern setting device (12) and input from sensor (10) A work presence / absence storage device (16) that stores the determination made by the check device (14) and the work presence / absence check device (14) and transmits the presence / absence of a work to the misgrip control unit (1) in the next process, Based on the setting state of the pattern setting device (12) and the monitor setting device (13) and the signal transmitted by the work presence / absence check device (14), Miss gripping judgment apparatus for determining (15), feed monitoring apparatus according to claim 1, wherein said to have.

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