JPS62259756A - Work timber sorter in deburring apparatus - Google Patents

Abstract

PURPOSE:To aim at automating the sorting of work timber with the use of a device for sorting work timber having an upper surface on which burrs are produced due to press work or the like, by providing such an arrangement that working timber having its upper surface on which burrs are produced is alone discriminated and is fed to a grinding device. CONSTITUTION:A detecting device 20 detects the condition of opposed surfaces of work timber W fed from a feeder. A central control device discriminates the presence cf burrs on the opposed surfaces in accordance with an output signal from the detecting device 20. If burrs are present on the upper surface, a diverting device 30 is set to an open position to introduce the working timber W into a grinding device. Meanwhile, in the case of no burrs present on the upper surface, if the work timber W would be fed direct into the grinder, the upper surface would be ground so that the thickness of the work timber would he unsuitable. Accordingly, the diverting device is changed over to a discharge position to discharge the working timber W. Thus discharged working timber W is again fed into the feeder. Accordingly, working timber W having its upper surface on which burrs are present, is alone fed into the grinding device for grinding out the burrs.

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 supplied to the grinding section. This invention relates to a sorting device for processed materials.

<Prior Art> When a burr is ground by a grinding device, the burr is formed only on one side of the workpiece.

It must be fed to the grinding machine with the burr side facing up. By the way, in the past, the number of processed materials was 1
There is now a device to automatically perform the sorting.

For this reason, it is necessary to manually select each piece one by one while checking the burr position on the workpiece and feed it to the grinding section of the grinding device, which has been an obstacle to achieving automated 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 comprises: 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 that allows the workpiece to travel to the grinding section and a discharge position that discharges the workpiece from the workpiece supply path; The distribution of the processed material supply path is arranged at the upstream position of the device,
A detection device faces the top or bottom surface of the workpiece and detects the state of the opposing surface, and a signal from the detection device determines whether or not there is a burr on the opposing surface. If it is determined that the dispenser is present, the dispenser is provided with a control device that converts the device into a supply position; otherwise, the dispenser is provided with a control device that converts the device into a discharge position.

Effect〉 The workpiece supplied from the feeder is detected by the detection device.
The state of the surface facing the workpiece is detected. Based on the output from the detection device, the control device determines whether there is a burr on the opposing surface, and if there is a burr on the top surface,
For sorting, the device is in the open position and the workpiece is guided to the grinding section side of the grinding device. Also, if there are no burrs on the top surface, if you feed it as is to the grinding section, even though there is no burr,
The top surface is ground and the thickness of the workpiece is inadequate. 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 can be 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, a material feeding device 5 is disposed below the grinding section ff1l, with a material feeding belt 8 hooked around a drive roll 6 and a driven roll 7 at regular intervals.

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

Reference numeral 11 denotes a shooter that is supported on a base by support columns 12 and 12 and whose lower end is located on the upper surface of the material feeding device 5, and whose 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.

Referring to FIG. 2, reference numeral 20 denotes a detection device for detecting the presence or absence of burrs on the workpiece, which is disposed on the lower surface of the chute 11 and whose burr detection end is positioned directly below the workpiece supply path 10. There is.

The detection device 20 is, for example, a displacement sensor that converts a distance to a detection surface into a voltage value. In other words, the maximum voltage is generated when the detection surface does not block the detection end of the detection device 20, and a small voltage is generated in response to the approach distance of the detection surface. amplified.

Therefore, when the burr X of the workpiece W is on the upper surface as shown in FIG. becomes. Therefore, the output voltage from the detection device 20 becomes the lowest.

FIG. 4A shows the waveform of the output voltage from the sensor amplifier 21 as the workpiece W runs over the detection device 20 when the burr X is on the upper surface. It is shown that the detection level or I is the lowest. Note that if the workpiece W has through holes y and y formed as shown in Figure 3.4, the same condition will occur in this gap as if there were no workpiece W, and the pulses a and a would be Occur.

On the other hand, as shown in Figure 3, burrs
, the lower surface of the workpiece W is raised by the protrusion ms of the burr X. Therefore, compared to the case where the burr be higher than

4 shows the waveform of the output voltage from the sensor amplifier 21 in this case, and it is shown that the detection level 12 is higher than the detection level statement 1. still,
The front end where the burr X is formed and the rear end are the shooter 11.
Since it is in contact with the top surface, the lowest voltage pulses b, b are instantaneously
At the same time, pulses a and a are generated by the through holes y and y as in FIG. 4A.

The detection device 20 may convert the distance of the detection surface into a current value.

The signal voltage (current) from the sensor amplifier 21 is converted into a digital value by the A/D converter 22 as shown in FIG. 6, and is input to the central control unit CPU.

Located downstream of the detection device 20, the shooter 1
1 is provided with a distribution device 30 as shown in FIG.

The distribution device 30 controls the opening and closing of the drop opening 31 formed in the chute 11 using 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 how it happens. That is,
When the rod of the swinging cylinder 34 is in the extended state (supply position), the swinging bottom plate 32 blocks the drop port 31 and keeps its top surface flush with the top surface of the chute 11, allowing the workpiece to be removed from the detection device 20 side. The workpiece W that has slid down the supply path 10 is allowed to pass and is transferred onto the feed material radical 5. Further, when the rod contracts (to the discharge position), the drop port 31 is opened and the workpiece W is discharged from the workpiece supply path 10. This discharged workpiece W is retransferred to the vibrating feeder 15 by a conveyor, or is temporarily stored in a storage container,
It is carried to the vibrating feeder 15.

The distribution portion is placed on the swinging bottom plate 32 in the mounting 30.
A detector KD is provided to confirm the passage of. This detector KD is, for example, a reflection type light Ml? A switch can be applied, and in this case, a hole for transmitting light is formed in the swinging bottom plate 32 at a position facing the detector KD, and when the workpiece W passes under the detector KD, The arrival of the workpiece W is detected by reflection on the workpiece W, and when the workpiece W passes, the light is transmitted through the chain hole, and passage of the rear end can be detected.

FIG. 5 shows another arrangement fi 30, in which notches 35, 36 are formed in the side fi 13, 13 of the chute 11 at a position below the detection device 20 in an opposed manner, and the swing cylinder 37, a swing guide plate 39 whose rotation is controlled around a support shaft 38 is disposed in the notch 35. With this configuration, when the swing cylinder 37 is in the low or low contracted state (supply position), the inner surface of the swing guide plate 39 is flush with the inner surface of the side wall 13, allowing the workpiece W to slide down. , in the extended state (discharge position) of the rod, close the workpiece supply path 10 and guide the workpiece W to the notch 36;
The workpiece W is dropped from the notch 36.

In each of the embodiments described above, the swing cylinders 34 and 37 may be replaced by solenoids.

The central control unit CPU described above controls the conversion of the distribution device 30 in response to the detection of the burr X by the detection device 20. That is, when it is detected that there is a burr X on the lower surface of the workpiece W, the device 30 is set to the discharge position for the distribution, and conversely, there is no burr X on the lower surface of the workpiece W (there is a burr X on the upper surface). ) is detected, the distribution is such that the device 30 is placed in the supply position.

Further, as shown in FIG. 6, the central control unit CPU has the following functions:
Data with burrs is input in advance. This converts the selection switch connected to the central control unit CPU into a data input position, and detects the detection device 2E20. Sensor amplifier 21. The A/D converter 22 is used as a circuit for processing data with burrs, and the workpiece W is run on the detection device 20 with the surface without burrs X as the lower surface. Then, the above-mentioned detection level it is detected by the downward running. However, since the surface of the workpiece W is expected to have countless minute irregularities, the central controller cPU calculates m (m) and sets a value higher than the detection level, Q+, as the threshold value 0 For example, if the measured detection level sentence! is 0.77, the agony level sentence 3 is determined to be 0.8 ma by arithmetic processing.

Next, the control of the central control unit CPU will be explained in more detail based on the flowcharts of FIGS. 7-9.

First, the central control unit CPU is started, and the workpiece W is supplied from the vibrating feeder 15 to the workpiece supply path lO, and when it slides down the upper surface of the chute 11 and reaches the position of the detection device 20,
In routine A, it is determined whether the burr X of the workpiece W is on the lower surface. This routine A is executed according to the flow shown in FIG.

First, in step AI, it is determined whether the data input from the detection device 20 to the central control unit CPU via the sensor amplifier 21 and the A/D converter 22 is at the level ih in which there is no workpiece W. . If the workpiece W is at or below the level, it is assumed that the workpiece W has arrived at the position of the detection device 20.

Step A2 for a certain period of time (1,7100 to 1/10
00 seconds) starts storing measurement data.

By the way, when the processed material W has through holes y and y,
The level uh is detected by detecting the through holes y and y.

If this is stored as data as it is, the average value, which will be described later, will be unreasonably large. Therefore, when level lh is input (step A11), a timer Td is set, and until that time-up,
Unless a new storage start command is given, storage of the measured data is interrupted (step A4).The timer Td is set to a time sufficient for the through holes y and y to pass through.

By the way, the time it takes for the processed material W to pass through the detection device 20 is 1.
If it is about seconds, the timer Td is set to 0.3 seconds, for example.

That is, first, when the through hole y reaches the detection device 20, the timer Td is set and the storage of measurement data is interrupted. It is assumed that the timer Td is not reset during operation, and step A3 is continued until the through hole y passes through.
When the loop from ~A5 is repeated Oa and the through hole y passes through, the loop from steps A2 to A3 is circulated, and storage of the measurement data is restarted. When the next through hole y comes to the position of the detection device 20 again, the timer Td has already timed up and is in the initial state, so the next through hole y is detected again.
The storage of measurement data is interrupted until the workpiece W escapes, and storage is resumed after the escapement, and at the same time the end of the workpiece W passes. In the case of passing through the terminal, the timer Td is activated in the same way, and due to the time-up, step A6
The stored data is processed. This data processing eliminates the maximum and minimum values and averages the remaining data. The reason why the maximum value and the minimum value were removed is to remove protruding values due to scratches etc. on the surface of the workpiece W and calculate an appropriate average value.

This average value is compared with a threshold fL3 (step A7).
, if the value is higher than threshold statement 3, burr X is created on the lower surface of the workpiece W
If the value is low, it is determined that there is no burr X on the bottom surface.

Thus, the discrimination of the workpiece W is completed.

In FIG. 9, routine B for determining the passage time of the workpiece W is executed together with routine A.

As shown in FIG. 9, in this routine B, when the front end of the workpiece W arrives at the detection device 20, the process moves to step B2, where the timer is counted, and the count is stopped as the rear end of the workpiece W passes. , record the count time Ta (step B4). Since the workpiece W has through holes y and y as described above, it is memorized as the timer Td described above times up. (This mechanism is omitted)
.

After going through the routines A and B, it is determined in step (2) in FIG. 7 whether or not the workpiece W is on the upper surface. In other words, since the detection device 20 determines the presence or absence of burrs X on the lower surface of the workpiece W, step A8 in FIG. 34 is contracted (step ■), the swinging bottom plate 32 is tilted, and the drop port 31 is opened. Alternatively, in the configuration shown in FIG. 5, the swing cylinder 37 is expanded and the swing guide plate 39 is tilted, thereby blocking the workpiece supply path 10.

That is, the device 30 is at the discharge position for the distributed amount.

Further, when it is determined that there is no burr X on the lower surface of the workpiece W as shown in step A9 of FIG. is blocked. Alternatively, the swing cylinder 37 is contracted and the workpiece supply path 10 can pass through.

Next, 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 T
b is counted.

By the way, the workpiece W is placed on the swinging bottom plate 32 directly under the detector KD.
The sensor may get caught in a hole drilled in the sensor, become unable to move, and stop directly below the detector KD. Therefore, in step (2), it is determined whether or not the curvature is Ta≧Tb until the detector KD turns off (step (2)). In other words, if it has stopped under the detector KD, the answer is YES and it is recognized as an abnormal situation, and in step
is set to the discharge position, and all functions such as stopping the drive of the vibrating feeder 15 are stopped.

Further, the stoppage of the workpiece W may also occur on the chute 11 between the detection device 20 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.

Furthermore, in step (2), in order to exclude the case where the detector KD is turned off due to the off detection due to the through holes y and y, the above-mentioned timer Td is also set here, and the workpiece W is turned on only when the time is up. It is assumed that the light has passed through the detector KD.

After that, the workpiece wl with the burr 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).

In the embodiment described above, the detection bag 2120 is embedded in the chute 11 to detect the presence or absence of burrs It's okay. Examples of such a top surface detection method are shown in 10th to 1st.
Figure 3 will be explained.

Referring to FIG. 10, reference numeral 40 denotes a material feeding device in which a material feeding belt 42 is passed between the front and rear rolls 41, and the upper running surface of the material feeding belt 42 is used as a processing material supply path. The rear end of the material feeding device 40 is continuous with the material feeding mounting 5, and the processed material W is supplied to the front end from a feeder (not shown) at predetermined intervals. A detection device 45 is mounted on the material feeding belt 42 by a holding frame 46 so that the material feeding interval is small. In this configuration, the workpiece W is
The workpiece W travels at a constant speed according to the traveling speed of the material conveying belt 42. For this reason, the detection device 45
The traveling speed of the workpiece W can be slowed down so that a highly accurate signal voltage can be extracted from the workpiece W.

In this basic configuration, the configurations shown in FIGS. 11 to 13 may be adopted in order to bring the workpiece W into even and close contact with the material conveying belt 42 and to extract accurate information from the detection device 45.

That is, in FIG. 11, suppressing rolls 50, 50, which are urged downward by springs 51, are arranged in front and behind the holding frame 46 at the upper position of the material feeding belt 42, and are supported on the inner surface of the material feeding portion of the material feeding belt 42. A plate 52 is provided. With this configuration, the workpiece W that has come to the lower part of the detection equipment 45 is pressed toward the material feeding belt 42 side by the press roll 50.5o,
In addition, since the lower surface is held by the support plate 52, the workpiece W travels in close contact with the material conveying belt 42. In place of the suppression rolls 50, 50, front and rear integral holding plates which are urged downward by springs may be used.

In FIG. 12, a communication hole 55 is provided in the material conveying belt 42, and a suction chamber 56 communicating with a vacuum pump is provided on the lower surface of the material conveying belt 42.

A large number of suction holes 57 may be formed in the upper surface of the suction chamber 56. With such a configuration, the workpiece W that has come to the lower part of the detection device 45 has its lower surface connected to the communication hole 55. Suction hole 5
Receives suction action through 7.

It comes into close contact with the material conveying belt 42.

FIG. 13 shows a magnet 58 attached to the inner surface of the material feeding portion of the material feeding belt 42.
is arranged. In this configuration, the metal workpiece W is attracted to the magnet 58 via the material feed belt 42 at the lower part of the detection device 45, and travels in close contact with the material feed belt 42.

Even in the configuration in which the presence or absence of burrs X is determined on the upper surface of the workpiece W using the detection device 45 as in the embodiment described above, the workpiece W is determined according to the flowcharts shown in FIGS. 7 to 9.

In such a method, if a burr X is formed on the upper surface of the workpiece W as shown in FIG.
, the detection surfaces approach each other and the output voltage from the detection device 45 becomes low.

However, the processed material W has variations in wall thickness. Therefore, if the thickness is more than a predetermined value, even if there is a burr, it is determined that there is no burr because the top surface is close to the detection device 45, and if the thickness is less than a predetermined value, there is no burr. too,
Since the upper surface thereof is separated from the detection device 45, it is determined that there is a burr.

Therefore, unlike the method of detecting the lower surface of the workpiece W as in the first embodiment, the threshold value cannot be simply determined.

Therefore, two threshold values, a minimum value and a maximum value, are determined, and only when the output voltage is between those values, it is determined that there is a burr, and the upper surface is subjected to a grinding process using a grinding machine FIT.

For example, set the minimum threshold to 0.97. Assuming that the maximum threshold value is 1.17, if it is less than 0.9 mm, there is no burr, or even if there is a burr, the thickness is excessive, and if it exceeds 1.1 mm, the thickness is too large. This is a case of being too small. Therefore, in order to eliminate both of them from the grinding process, the
Only those within the range of 7 are judged as having burrs.

In addition, in such a method, since the signals in steps A8 and A9 in FIG. 8 output the presence or absence of burrs regarding the state of the upper surface, they directly correspond to the determination in step (3) in FIG. No inversion required.

Furthermore, even in the above method, by converting the selection switch connected to the central control unit CPU into a data input position and transporting the workpiece W with the burr-free side down by the material conveying belt 42, the above-mentioned two types The threshold value setting is automatically calculated and set.

In addition, in the configuration of the above-mentioned top surface detection type, the distribution is made by the device 3.
As for 0, the one shown in FIG. 5 can be suitably applied.

<Effects of the Invention> As described above, the present invention detects the surface condition of the workpiece W using a detection device, discriminates the signal from the detection device using a control device, and issues a command to the device for distribution. In this distribution, the workpiece is guided to the grinding section of the grinding device only when there is a burr on the top surface, so the workpiece is automatically sorted and the deburring machine is automated. There are excellent effects that can contribute to

[Brief explanation of drawings]

The attached drawings show embodiments of the present invention, and FIG. 1 is a schematic side view of deburring equipment, FIG. 2 is a vertical side view of sorting and mounting, and FIG.
Figure A9 is an enlarged longitudinal sectional side view of the detection device 20 showing the detection mode, Figure 4 is a waveform diagram shown in comparison with the shape of the workpiece W, and Figure 5 is a plan view of the device 30 for other distributions. , Figure 6 is a block diagram, Figures 7 to 9 are flowcharts, and Figures 10 to 1.
FIG. 3 is a longitudinal sectional side view showing an embodiment of the top surface detection method. 1; Grinding installation 5; Material feeding installation 10; Processed material supply path 1
1; Shooter 15: Vibration feeder 20, detection device
30; Distribution device 31; Drop opening 32; Swinging bottom plate
34; Swing cylinder 37; Swing cylinder 39;
Swinging guide plate 40; material feeding radical 45; detection device KD, detector CPU, central control device w; processed material X; burr
y: Through hole

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
A detection device that faces the top or bottom surface of the workpiece and detects the state of the opposing surface; and a signal from the detection device determines whether or not there is a burr on the opposing surface, and whether or not there is a burr on the top surface of the workpiece. A sorting device for workpieces in a deburring device, comprising: a control device that converts the sorting device to a supply position when it is determined that there is a sorting device, and a control device that converts the sorting device to a discharge position in other cases.