JPH0353054B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is applicable to, for example, when automatically supplying a short material to a press machine for press processing, the short material is The present invention relates to an automatic short material supply and discharge device that adjusts the supply pitch of materials to process products from short materials without waste.

(Prior art) Conventionally, for example, when pressing a short material using a press machine, the number of punches to be punched into one short material is set using a preset counter, and then the short material is automatically fed to the press machine for press processing. However, short materials generally vary in size, and in addition, during the process of automatically feeding short materials to a press machine, slipping may occur between the automatic feeding device and the short materials. , errors in the feeding pitch of short materials accumulate due to variations in the intermittent feed rate of the automatic feeder, resulting in fewer holes than the set number of holes being drilled in a single sheet of short material, or half-chips at the ends of short materials. This had the disadvantage that short lengths of material were wasted as holes sometimes appeared.

(Objective of the Invention) When automatically feeding short materials to a processing device to process the short materials, intermittent driving of the short materials is started at an intermittent feed amount corresponding to the total length of the short materials, and each time the short materials are intermittently driven. By providing an automatic supply/discharge device for short materials that measures the actual intermittent feed amount and then corrects the feed amount of the intermittent drive immediately after that in accordance with the feed amount for each intermittent drive, it is possible to eliminate waste from short materials. The goal is to process products reliably without any problems.

(Structure of the Invention) In order to achieve the object of the present invention, the present invention unloads a short material from a short material loading device, transports it to a preset arbitrary position, and then positions and stops it using a positioning means provided at the position. a supply device, a length measuring device that measures the length of the short material that has been positioned and stopped and outputs a length measurement signal corresponding to the length of the short material; An intermittent drive device for intermittently driving a short material, and a feed that measures the actual intermittent feed amount of the short material that is intermittently driven by the intermittent drive device and outputs a measurement signal corresponding to the intermittent feed amount. an amount measuring device, a processing device that processes the short material after the actual intermittent feed amount has been measured by the feed amount measuring device, and outputs a timing signal for each process; A length measurement signal outputted from the feed amount measuring device, a timing signal outputted from the processing device are inputted, and a feed amount for intermittently driving the short material is calculated, and the feed amount corresponds to the calculated feed amount. The driven signal is outputted to the intermittent driving device to start intermittent driving of the short material, and for each timing signal outputted from the processing device, the This automatic short material supply and discharge device is equipped with a calculation device that calculates and corrects the intermittent feed amount of the short material and outputs a correction drive signal to the intermittent drive device to correct the intermittent feed amount of the short material.

(Embodiment of the Invention) The configuration of an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. Fig. 1 is a front view showing the arrangement of each device in this embodiment, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is a block diagram showing the arithmetic control system of this embodiment. .

This will be explained from FIG. 2 in relation to the order in which the short materials are moved. In FIG. 2, a material supply device 3 that sucks short materials 1 from a loading device 2 loaded with short materials 1 using vacuum suction force and conveys them to a predetermined location is controlled by a sequence control circuit to control a vacuum cylinder 4 to the loading device. 2, the vacuum cylinder 4 is lowered in the direction of the arrow 6, the vacuum head 7 is brought into contact with the short material 1, and the vacuum suction force is applied to the short material 1. to be absorbed. After the vacuum head 7 sucks the short material 1, the vacuum cylinder 4 is raised to a predetermined height in the direction of arrow 8, and then horizontally conveyed to a predetermined position in the direction of arrow 9, and further
After the short material 1 is lowered in the direction 0 and landed at a predetermined place 11, the suction of the vacuum head 7 is released.

The short material 1 that has landed at a predetermined location 11 is pushed in the direction of the arrow 13 by the feed supply cylinder 12 and placed onto the feed box 14.

In FIG. 1, a photoelectric beam switch 15 that detects the presence of the short material 1 placed on the feed box 14 and outputs a signal outputs a presence signal of the short material 1 to a control device 42, which will be described later in FIG. , the control device 42 outputs a drive signal to the pusher cylinder 16 to drive it in the direction of the arrow 17, pushing the short material 1 until the end face of the short material 1 collides with the stopper 18 and is slightly bent.

As shown in FIG. 5, which will be described later, the stopper 18 is provided with a shock sensor 19 that detects vibrations generated when the short material 1 collides with the stopper 18 due to the pushing action of the pusher cylinder 16 and generates a signal. A feeding device 2 for inputting an output signal from 19 to the control device 42 and causing the control device 42 to feed the short material 1 intermittently.
A clamp signal for clamping the short material 1 is outputted to lower the upper roll 21 which moves up and down by the cylinder mechanism. When the upper roll 21 is lowered by the cylinder mechanism, a non-contact switch 22 built into the cylinder mechanism is activated, detects the completion of the clamping, and outputs an output signal to the control device 42 to raise the upper roll 21. The descent of the roll 21 is stopped.

When the short material 1 is clamped by the upper roll 21 of the feeding device 20 completing its descent, the control device 42 outputs a retraction signal for the pusher cylinder 16 to retract the pusher cylinder 16 to its initial position. Simultaneously with the completion of the retraction of the pusher cylinder 16, the non-contact switch 23 built into the pusher cylinder 16 is activated and a retraction completion signal is output to the control device 42.

The short material 1, which has been deformed due to the extrusion action of the pusher cylinder 16, is deflexed and expanded as the pusher cylinder 16 retreats. It is configured with an image sensor 24 for recognition and a light source 25 for assisting length measurement, and outputs the length measurement signal to a calculation device 41 shown in FIG. 3 and described later.

A measure roll 26 is controlled by the control device 42, and the image sensor 24 measures the total length of the short material 1, measures the actual intermittent feed amount of the short material 1 that is intermittently fed by the feeding device 20, and outputs the measurement signal. The measuring roll 26 is lowered in response to the outputted drive signal, and completion of the lowering is detected by inputting to the control device 42 an actuation signal of the non-contact switch 27 built in the cylinder mechanism that moves the measure roll 26 up and down.

When the lowering completion signal of the measure roll 26 is input to the control device 42, the control device 42 outputs a lowering signal to the stopper 18 to lower it, and also outputs a drive signal to the feed device 20 to intermittently move the short material 1. Start feeding.

The feeding device 20 starts feeding the short material 1, and after the short material 1 is rapidly forwarded to the first press processing position, the first punch is performed, and then the press machine 28 sequentially punches the material each time the press is completed. A timing signal is outputted to cause calculation, feeding drive of the feeding device 20, and repeated operations of press working to be performed.
At this time, the measure roll 26 measures the actual feed amount for each intermittent drive of the short material 1 fed by the feed device 20 and outputs the measurement signal to the arithmetic device 41. Immediately after that, the intermittent feed amount is corrected, and the corrected intermittent feed amount signal is output to the control device 42 and the feed device 20
Correct the feed amount.

When the intermittent feeding and press working of the short material 1 progresses and the tip of the short material 1 passes through the discharge side feeding device 29 which has the same function as the feeding device 20, the short material 1 of the discharge side feeding device 29 is moved. A photoelectric beam switch 30 provided in the discharge direction detects the passage of the short material 1 and outputs a signal of the passage to the control device 42 .

The control device 42 receives the passage signal of the short material 1 output from the photoelectric beam switch 30.
outputs a signal to lower the upper roll 31 of the discharge device 29 having a cylinder mechanism during the period when the intermittent movement of the short material 1 is stopped, and lowers it by an output signal from a non-contact switch 32 built in the cylinder mechanism. When it is detected that the clamping of the short material 1 is completed, the upper roll 21 of the feeding device 20 is raised.

Furthermore, the control device 42 controls a measure roll 3 on the discharge side that has the same function as the measure roll 26 on the feed side.
By outputting a descending signal to the measuring roll 3 to lower it and inputting an output signal from a non-contact switch 34 built into the cylinder mechanism of the measuring roll 33, it is possible to detect that the short material 1 and the measuring roll 33 have come into contact with each other. Measure roll 26 on the rear feed side
to rise.

After the short material 1 is clamped by the feed device 29 on the discharge side, intermittent driving is performed by the feed device 29 on the discharge side, and the actual feed amount is measured by the measure roll 33 on the discharge side, and sequentially, A series of calculation controls are performed until the press working of the short material 1 is completed.

Next, the electrical system block diagram shown in FIG. 3 will be explained. The computing device 41 includes an image sensor 24 that measures the total length of the short material 1, a measure roll 26 or 33 that measures the actual intermittent feed amount each time the short material 1 is intermittently driven and outputs a measurement signal, and a timing signal that outputs a timing signal every time pressing is completed. By inputting the output signal from the output press 28, the initial feed amount corresponding to the entire length of the short material 1 is calculated, and it also corresponds to the measurement signal of the measure roll 26 or 33 for each intermittent drive of the short material 1. The intermittent feed amount immediately after that is corrected according to the actual feed amount, and the calculated signal is output.

Further, the control device 42 uses the calculation signal output from the calculation device 41 and the photoelectric beam switch 1 for detecting the presence of the short material 1 in the feed box 14.
5, a shock sensor 19 that detects vibration when the short material 1 collides with the stopper 18, and a non-contact switch 22 that is activated when the upper roll of the feeding device 20 descends and comes into contact with the short material 1. A non-contact switch 23 that operates when the pusher cylinder 16 retreats, non-contact switches 27 and 34 that operate when the measure roll 26 and the measure roll 33 come into contact with the short material 1, and the feed device 2 on the discharge side.
A non-contact switch 32 is activated when the upper roll 9 descends and comes into contact with the short material 1, and the short material 1 passes through the feeding device 29 on the discharge side and is transferred to the major roll 3.
By inputting the signals output from each of the photoelectric beam switch 30 that detects the passage of the short material 1 when the short material 1 reaches the position of the pusher cylinder 16, the feed device 20, and the feed device 29 on the discharge side
A drive signal is output to the upper and lower cylinder mechanisms of the measure rolls 26 and 33, the stopper 18, and the press machine 28 to drive them.

(Operation of this embodiment) Next, the operation of this embodiment will be explained with reference to FIGS. 4 and 5. After the short material 1 transported by the material supply device 3 is placed on the feed box 14, the presence of the short material 1 is confirmed by the photoelectric beam switch 15 (FIG. 5 1). The control device 42 drives the pusher cylinder 16 to press the short material against the stopper 18 in the indexed state. (Step 101 in Fig. 4 and Fig. 5 2) After the short material 1 is pressed against the stopper 18, the upper roller 21 of the feeding device 20 is lowered to clamp the short material 1, (Fig. 5 3) Afterwards,
Retract the pusher cylinder 16. As a result, the short material 1, which has been deflected by the pushing action of the pusher cylinder 16, is stretched again by a predetermined distance l1, as shown in FIG. The length of is the total length of the short material 1.
In step 102 of FIG. 4, the image sensor 2
4 measures the l2 and sends the measurement signal to the calculation device 4.
1, the arithmetic unit 41 calculates the total length l of the short material 1 by adding the existing value l1 and the l2 at step 103. In step 104 in FIG. 4, the arithmetic unit 41 divides the calculated total length l of the short material 1 by the reference feed pitch l3 to calculate the number of presses by dividing l÷l=A·B, and calculates the number of presses. Total value of A and decimal O・B
B is calculated, and l÷A=l5 is further calculated to calculate the initial feed amount l5. At step 105 in FIG. 4, the arithmetic circuit 41 uses the signal from the control circuit 42 to move the upper roll 2 of the feeding device 20 as shown in FIG.
1 and the measure roll 26 have clamped the short material 1, and if the result is Yes, the control device 42 drives the stopper 18 downward to complete preparations for feeding the short material 1. Figure 4 Steps
At step 106, the control device 42 inputs the signal of the starting feed amount l4 stored in advance in the calculation device 41, and causes the short material 1 to start feeding into the mold of the press machine 28 (FIG. 5, 6). Thereafter, a processing command is output to the press machine 28 to cause it to press the first punch.

At step 107 in FIG. 4, the arithmetic unit 41 determines whether or not a punching completion timing signal has been output from the press machine 28. If the timing signal has been output, at step 108 in FIG.
By transmitting a signal corresponding to the initial feed amount l5 calculated in step 104 to the control device 42, the control device 42 outputs a drive signal to the feed device 20 to feed the short material 1 at the feed amount l5 for the first time. While feeding, measure the actual feed amount for the first time using the measure roll 26.
lα1 is measured and the measured signal is input to the arithmetic unit 41.

At step 109 in FIG. 4, the calculation device 41 subtracts the initial actual feed amount lα1 from the total length l of the short material 1 to calculate l−lα1=l6 to calculate the remaining length l6. The remaining length l6 is divided by the number of remaining punches (A-1) to calculate the second feed amount l7, which is l6÷(A-1)=l7. Thereafter, through signal communication between the arithmetic device 41 and the control device 42, the control device 42 outputs a processing command to the press machine 28 to cause the press processing of the second punch to be performed.

In step 110 of FIG. 4, the arithmetic unit 41 determines whether or not the timing signal indicating the completion of the second punch has been output from the press machine 28. If the timing signal is output, the arithmetic unit 41 executes the step 110 in step 111 of FIG. By transmitting a signal corresponding to the second feed amount l7 calculated in step 109 to the control device 42, the control device 42 outputs a drive signal to the feed device 20 to feed the short material 1 at the feed amount l7. At the same time as the second feeding is performed, the second actual feeding amount lα2 is measured by the measure roll 26, and the measured signal is input to the arithmetic unit 41.

At step 112 in FIG. 4, the calculation device 41 calculates the second actual feed amount from the remaining length l6 of the short material 1.
l6− to subtract lα2 and calculate its remaining length l8
Calculate lα2=l8 and divide the remaining length l8 of the short material 1 by the number of remaining punches (A-2) to calculate the third feed amount l9. l8÷(A-2)=l9 Calculate. After that, the calculation device 41 and the control device 4
2, the control device 42 outputs a machining command to the press machine 28 to cause it to press the third punch.

In step 113 in FIG. 4, the arithmetic unit 41 determines whether or not the timing signal indicating the completion of the third punch has been output from the press machine 28. If the timing signal has been output, in step 114 in FIG. By transmitting a signal corresponding to the third feed amount l9 calculated in step 112 to the control device 42, the control device 42 outputs a drive signal to the feed device 20 to feed the short material 1 at the feed amount l9. At the same time as the third feed, the third
The actual feed amount lα3 is measured and the measured signal is input to the calculation device 41.

Thereafter, the same calculations and controls as those in steps 109 and 112 are repeated, and the latter half feeding drive of the short material 1 and measurement of the actual feed amount are transferred to the discharge side feeding device 29 and the discharge side measure roll 33, and the same calculations are performed. and repeat the control. When the short material 1 has been fed the (A-1)th time, the feeding drive of the short material 1 is completed and the final press working is performed. In the above case, the remainder of the short material 1 is O・B, but if O・B
When is close to 1, the remainder of the short material 1 when O.B/l3 is added for each feeding process is O.C, but this value is small and therefore ignored.

In this way, even if there is variation in the total length of the short material 1, the number of presses without waste can be calculated according to the total length of the short material 1, and the actual feed amount can be measured each time the short material 1 is fed. In order to calculate the feed amount corresponding to the remaining length of each short material 1 after punching and to perform the feed drive immediately after that,
There is an effect that processing of the short material 1 is completed without waste when all punching of the short material 1 is completed.

(Effect of the invention) When automatically feeding short materials to a processing device to process the short materials, intermittent driving of the short materials is started at an intermittent feed rate corresponding to the total length of the short materials, and each time the short materials are intermittently driven. By measuring the actual intermittent feed amount and then correcting the feed amount of the intermittent drive immediately after that in accordance with the feed amount of each intermittent drive, it is possible to reliably process products from short materials without waste. effective.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 3 is an arithmetic control flowchart of this embodiment, and FIG. 5 is a partial front view for supplementary explanation of the arithmetic control. 1...Short material, 3...Material supply device, 16...
Pusher cylinder, 18... Stopper, 20...
...Feeding device, 24...Image sensor, 26...
Measure roll, 28...press machine, 29...discharge side feeding device, 33...discharge side measure roll, 41...computing device, 42...control device.

Claims (1)

[Claims] 1. A supply device that carries out a short material from a short material stacking device, transports it to a preset arbitrary position, and then positions and stops it using a positioning means provided at the position, and measures the length of the short material that has been positioned and stopped. Further, a length measuring device outputting a length measurement signal corresponding to the length of the short material, an intermittent driving device for intermittently driving the short material whose length has been measured by the length measuring device, and the intermittent driving device. a feed amount measuring device that measures the actual intermittent feed amount of the short material driven intermittently by the feed amount measuring device and outputs a measurement signal corresponding to the intermittent feed amount; a processing device that processes the short material after it has been measured and outputs a timing signal for each processing; a length measurement signal output from the length measurement device; a measurement signal output from the feed rate measurement device; and a processing device. inputting a timing signal outputted from a timing signal outputted from the controller to calculate a feed amount for intermittently driving the short material, and outputting a drive signal corresponding to the calculated feed amount to the intermittent drive device to intermittently drive the short material. At the same time, for each timing signal output from the processing device, the intermittent feed amount of the short material is calculated and corrected in accordance with the measurement signal output from the feed amount measuring device, and the corrected drive signal is applied to the intermittent feed amount. An automatic short material supply and discharge device characterized by comprising: an arithmetic device that outputs an output to a drive device to correct the intermittent feed amount of the short material.