JPS62259757A - Work timber sorter in deburring apparatus - Google Patents

Abstract

PURPOSE:To automate the sorting of work timber with the use of a device for sorting working timber having its outer surface on which burrs are produced during press working or the like, by providing such an arrangement that two upper and lower detecting devices and a control device are provided to detect only work timber having its upper surface on which burrs are produced. CONSTITUTION:Detecting devices HS1, HS2 detect both opposed surfaces of work timber which is stopped by a stopper 29 at a position where the above-mentioned detecting devices HS1, HS2 are arranged, and a central control device compares output signals from the detecting devices with each other to determine whether any burr is present on the upper surface of the work timber W or not. After the determination, the stopper 29 is opened. If there is any burr on the upper surface, a diverting device 30 is set to an open position to introduce the work timber W into a grinding device. In the case of no burr on the upper surface, if the working timber W would be introduced directly into the grinding device, the upper surface of the timber W would be grounded, resulting in having an unsuitable thickness, Accordingly, the diverting device 30 is changed over into a discharge side position so that work timber W is discharged. Thereby work timber having its upper surface on which burrs are produced, is alone ground in the grinding device.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is a deburring device that removes burrs generated on the periphery of a workpiece due to press working, etc., in which only the workpiece with burrs on the upper surface is sent to the grinding section. The present invention relates to a sorting device for processing materials for supply.

<Prior Art> When grinding burrs using a grinding device, since the burrs are formed on only one side of the workpiece, it is necessary to feed the workpiece to the grinding device with the burr side facing up. By the way, there is no conventional device for automatically selecting the position of workpieces to be darned.

For this reason, it is necessary to manually select each workpiece one by one while checking for burrs, and then supply the workpiece to the grinding section of the grinding device, which has been an obstacle to achieving automation of deburring.

An object of the present invention is to provide a sorting device that can automatically set the workpiece supplied to a grinding device so that burrs are always on the upper surface.

Means for Solving Problems> The present invention provides a workpiece supply path that guides a workpiece supplied from a feeder to a grinding section of a burr grinding device that grinds the upper surface of the workpiece to remove burrs; a distribution device that is interposed in the workpiece supply path and is converted into a supply position where the workpiece can travel to the grinding section and a discharge position where the workpiece is discharged from the workpiece supply path; The distribution of the processed material supply path is arranged at an upstream position of the device,
Two upper and lower detection devices facing the upper and lower surfaces of the workpiece detect the presence or absence of burrs on the workpiece; a stopper that temporarily stops the travel of the workpiece at the position of the detection device; and an upper and lower detection device. If it is determined that there is a burr on the upper surface side of the workpiece, the distribution converts the device to the supply position; in other cases, the distribution converts the device to the discharge position. It is equipped with a control device.

The workpiece fed from the feeder is stopped by a stopper at a certain position of the upper and lower detection devices, and the upper and lower detection devices detect the state of the opposing surfaces, and the control device compares the outputs. It is determined whether there is a burr on the upper surface of the workpiece. After the determination, the stopper is opened, and if there is a burr on the upper surface, the distribution device is placed in the open position and the workpiece is guided to the grinding section side of the grinding device. Further, if there is no burr on the upper surface, if the material is fed as is to the grinding section, the upper surface will be ground even though there is no burr, resulting in an inappropriate thickness of the processed material. Therefore, for sorting, the device is switched to the discharge side and the processed material is discharged. This discharged workpiece can be fed to the feeder again.

Therefore, only those with burrs on the upper surface are supplied to the grinding device, and the burrs are removed by grinding.

<Example> An embodiment of the invention will now be described with reference to the accompanying drawings.

Regarding FIG. 1, 1 is a grinding device, and a running roll 2
．． 3, a sanding belt 4 is applied. Further, at the bottom of the grinding device 1, a drive roll 6 is placed at a constant interval.
, the material feeding device i! is formed by passing the material feeding belt 8 over the secondary Th roll 7. t5 is arranged.

The running direction of the material conveying belt 8 is the same as that of the sanding belt 4.
A grinding section is defined between the grinding device 1 and the material feeding device 5, which intersects with the running direction of the grinding device 1 and the material feeding device 5.

11 is a pillar 12. , 12 on a base, and its lower end is positioned on the upper surface of the material feeding device 5, and its upper surface is used as a workpiece supply path 10. The upper end of the chute 11 is connected to a vibrating feeder 15 that intermittently supplies workpieces.

Next, the main parts of the present invention will be explained.

2 and 3, H9I and HS2 are upper and lower detection devices for detecting the presence or absence of burrs on the workpiece, and the lower detection device 2t) IS+ is embedded in the chute 11.

The detection end is positioned slightly below the material feeding surface of the chute 11.

The upper detection device HS2 is embedded in a suppressing piece 21 fixed to the rod end of a solenoid 20 vertically arranged by a frame 22 on the side of the shooter 11.
t, and its detection end is located slightly above the suppression surface 21.

The distance between the detection end of the detection device H9I and the material feeding surface is made to match the distance between the detection end of the detection device HS2 and the pressing surface of the pressing piece 21, so that the upper and lower surfaces of the workpiece W, which will be described later, are pressed together. In this state, the detection devices are arranged to face the upper and lower surfaces of the workpiece under the same conditions.

The detection devices Hs1 and HS2 are, for example, displacement sensors that convert the distance to the detection surface into a voltage value.

In other words, the maximum voltage is generated when the detection surface does not block the detection ends of the detection devices HS+ and H92, and a small voltage is generated corresponding to the approach distance of the detection surface.
It is amplified by sensor amplifiers AMPI and AMP2 shown in FIG.

A shooter 11 is located immediately downstream of the solenoid 20.
A solenoid 28 disposed vertically by a frame 27 is fixed to the side of the shooter 1 , and the solenoid 28 is fixed to the side of the shooter 1 by a frame 27 .
A stopper 29 that comes into pressure contact with the material feeding surface of 1 is fixed.

The solenoid 28 is in the extended state of the rod.

The stopper 29 comes into contact with the chute 11 to prevent the workpiece W supplied from the vibrating feeder 15 from sliding down and temporarily stops the workpiece W. As the workpiece stops, the rod of the solenoid 20 expands and presses the suppressor piece. 21 is pressed against the upper surface of the workpiece W, and the state of the upper and lower surfaces of the workpiece W is detected by the detection devices HSI and H92.

The detection devices HS+ and HSz may convert the distance of the detection surface into a current value.

The signal voltages (currents) from the sensor amplifiers AMPI and AMP2 are converted into digital values upstream from the A/D converter as shown in FIG. 5, and are input to the central control unit fi(:PU).

Said detection device! (At a downstream position of Sl and HS2, the shooter 11 is provided with a distribution device 30 as shown in FIG. 2.

The distribution device 30 controls the opening and closing of the drop opening 31 formed in the chute 11 with a swinging bottom plate 32 that is controlled to open and close around a support shaft 33 by a swinging cylinder 34 that is pivotally supported on a base. This is what happens. That is, the rod of the swing cylinder 34 is in an extended state 7! i (supply position), the swinging bottom plate 32 blocks the drop port 31 and makes its top surface flush with the top surface of the chute 11;
Detection device)+sI, H92m to processed material supply path 1
The workpiece W that has slid down the 0 is allowed to pass and is transferred onto the material feeding device 5. Further, when the rod contracts (discharge position), the drop port 31 is opened and the workpiece W is transferred to the workpiece supply path 1.
Discharge from 0. This discharged workpiece W is transferred again to the vibrating feeder 15 by conveyor 5, or is temporarily stored in a storage container and carried to the vibrating feeder 15.

The distributed portion is transferred to the device 30 by distributing the processed material W on the swinging bottom plate 32.
A detector KD is provided to confirm the passage of. For example, a reflection type phototube switch can be applied to the detector KD. In this case, a hole for transmitting light is formed in the swinging bottom plate 32 at a position facing the detector KD, and the processing material is When W passes under the detector KD, it is reflected by the workpiece W and the arrival of the workpiece W is detected. When the workpiece W passes, the light is transmitted from the chain hole and the trailing end passes through. Can be detected.

In the embodiment described above, the swing cylinder 34 may be replaced by a solenoid.

In addition, the distribution device 30 is arranged on the material feeding path, swings in the left-right direction, and retreats from the material feeding path at the -swing position to allow the passage of the processed material.

It is also possible to configure a swinging guide plate that blocks the material feeding path at another swinging position and causes the workpiece to fall to the side.

The central control unit CPU described above is a detection device H91+H
5Z detects the state of the corresponding surface of the workpiece X, and the distribution is controlled to convert the device 30. That is, when it is detected that there is a burr If it is detected that the supply position is present, the distribution is made so that the supply position is Δ30.

The control of this central control unit CPU will be explained in more detail based on the flowcharts of FIGS. 6 and 7.

First, start the central control unit CPU, and start the solenoid 28.
After the rod is extended, the workpiece W is supplied from the vibration feeder 15 to the workpiece supply path 10. Then, the workpiece W is prevented from sliding down by the stopper 29 of the solenoid 28 and is temporarily stopped (step 2).

Next, in routine A, it is determined whether the burr on the workpiece W is located on the upper or lower side.

This routine A is executed according to the flow shown in FIG.

First, in step A+, from the detection device ff1Hs+,
Sensor amplifier AMPi, AMP2, A/
It is determined whether the data input to the central control unit CPU via the D converter i) is at a high level with no workpiece W present. If the level is below that level, it is assumed that the workpiece W has arrived at the position of the detection devices H5H, H5z, the rod of the solenoid 20 is expanded, and the suppressing piece 21 is pressed against the upper surface of the workpiece W. By the way, at the time when the workpiece W contacts the stopper 29, the workpiece W vibrates in the traveling direction due to the contact and is not in a complete stopped state. Therefore, the drive of the solenoid 20 is detected by the detection device HSI. The process is executed t seconds after the detection of the workpiece (step A2).

In step A, the suppressing piece 21 is pressed against the upper surface of the workpiece W, and data DI and D2 are read by the detection devices Hs+ and HS2 on the sand diameter E.

In other words, as shown in Figs. 2 and 3, when the burr = ( of the workpiece W is on the top surface, the distance between the detection device H5z and the top surface of the workpiece is larger than the distance between the detection device 1IHst and the bottom surface of the workpiece. , the output voltage (data Dz) of the detection device H92 becomes larger than the output voltage (data D1) of the detection device H91.

Conversely, if the burr X of the workpiece W is on the bottom surface, the distance between the detection device HS2 and the top surface of the workpiece will be smaller than the distance between the detection device HS+ and the bottom surface of the workpiece, and the output voltage of the detection device IS2 (data Dz) is smaller than the output voltage (data D+) of the detection device HS+.

Therefore, after the solenoid 20 is released (the detection device HS2 is raised), DI and D2 are compared (step A4).
．． As)・ If DI < 02 (Figures 2 and 3), it is determined that there is a burr on the upper surface of the workpiece, and if DI > D2, it is determined that there is no burr on the upper surface of the workpiece (step As, A7 )
do.

Based on this routine A, when it is determined that there is a burr X on the upper surface of the workpiece W, the swing cylinder 34 is expanded (
In step (2), the swinging bottom plate 32 becomes the non-tilting position and the drop opening 31 is blocked.

Further, when it is determined that there is no burr X on the upper surface of the workpiece W, the swinging cylinder 34 is contracted (step ■), and the swinging bottom plate 32 is brought to the tilted position and the drop port 31 is opened.

Next, the rod of the solenoid 28 contracts and the stopper 29
is retracted upward, and the workpiece W slides down the workpiece supply path 10 (step ■).

When the workpiece W slides down the workpiece supply path 10 and reaches the device 30, the detector KD detects the front end of the workpiece W and turns on (step ■), and the timer Tb is counted. . The time limit set for this timer Tb is a sufficient time for the workpiece W to pass through the detector KD.

By the way, the processed material W is the swing bottom plate 32 directly below the detector KD.
Detector KD may get caught in a hole drilled in the hole, etc., and become unable to travel, causing the detector KD to stop vertically. Therefore, in step (2), it is determined whether or not the timer Tb has expired the set time limit until the detector KD turns off (step (◎)).

That is, if it has stopped under the detector KD, the answer is YES, and it is recognized as an abnormal situation, and in step (2), the device 30 is set to the discharge position, and all functions such as stopping the drive of the vibrating feeder 15 are stopped. .

Furthermore, the stoppage of the workpiece W may also occur on the chute 11 between the detection devices H9+ and H9z and the distribution device 30. Therefore, the timer Tc is set to a time longer than the cycle time for supplying the workpiece W, and the timer is activated at the same time as the detector KD is turned on.If the timer Tc times up, it is recognized as an abnormal situation, and the step Move to ■. That is, in a normal state, the next workpiece W passes under the detector KD and the timer TC is turned on again before the set time period expires, and the timer TC is reset, so no time-up of the timer Tc occurs.

By the way, if the workpiece W has through holes y and y as shown in FIG. 2, the state is the same as when there is no workpiece W, and the detector KD is turned off. Therefore, in order to eliminate the case where the off detection is due to the through holes y and y even if the detector KD is turned off, the through hole y
A timer Td is set in which the time allowed for the workpiece W to pass through the detector K is set, and only when that time is up, the workpiece W reaches the detector K.
It is assumed that D has passed. Incidentally, assuming that it takes about 1 second for the workpiece W to pass through the detection devices HSl, )lsz, the timer Td is set to 0.3 seconds, for example.

After that, the workpiece WI with burrs X on the upper surface is transferred to the material feeding device 5.
It is transferred to the side and its upper surface is ground by the grinding device 1. Further, the workpiece W2 with burrs X on the lower surface is the workpiece supply path 1.
0 and is again supplied to the vibrating feeder 15 (see FIG. 2).

<Effects of the Invention> As described above, the present invention detects the surface condition of the workpiece W using the two upper and lower detection devices, and the control device discriminates the signal from the detection devices, and the distribution is performed by the device. Since the machine guides the workpiece to the grinding section of the grinding device only when there is a burr X on the top surface, the workpiece is automatically sorted and deburred. It has excellent effects that can contribute to automation of the device.

[Brief explanation of drawings]

The accompanying drawings show embodiments of the present invention, in which Figure 1 is a schematic side view of a deburring device, Figure 2 is a vertical side view of a sorting device, and Figure 3 is a side view of a sorting device.
The figures are a sectional view taken along the line AA in FIG. 2, FIG. 4 is a sectional view taken along the line AA in FIG. 2, FIG. 5 is a block diagram, and FIG. fJIJ6.7 is a flowchart. HSI, HS2; detection device 1; grinding device 5
; Material feeding device 10; Processed material supply path 11; Shooter 15
;Vibration feeder 30;Distribution device 31;Drop opening
32; Swinging bottom plate 34; Swinging cylinder KD; Detector CPU, central control unit W; Workpiece X; Burr 4 Figure 30

Claims (1)

[Claims] A workpiece supply path that guides workpieces supplied from a feeder to a grinding section of a burr grinding device that grinds the upper surface of the workpiece to remove burrs; and a workpiece supply path that is interposed in the workpiece supply path. a distribution device that is converted into a supply position that allows the workpiece to travel to the grinding section and a discharge position that discharges the workpiece from the workpiece supply path; and an upstream position of the distribution device in the workpiece supply path. deployed in
Two upper and lower detection devices that face the upper and lower surfaces of the workpiece and detect the state of the opposing surfaces; a stopper that temporarily stops the travel of the workpiece at the position of the detection devices; and the upper and lower detection devices. The outputs of are compared to determine the presence or absence of burrs on the upper surface of the workpiece, and after the determination, the stopper is opened, and if it is determined that burrs are present, the sorting device is placed in the supply position, and in other cases, A sorting device for workpieces in a deburring device, comprising a control device that converts the sorting device to a discharge position.