JPH0644592Y2 - Deburring device for processed materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a deburring device for removing burrs formed on the periphery of a metal material such as iron or a plastic material by pressing or the like. Placed in front of the grinding section,
The present invention relates to a processing material selection device in a deburring device for supplying only a processing material having a burr on its upper surface to a grinding section.

<Prior Art> When a metal material such as iron, a plastic material, or the like is pressed, burrs are generated on the periphery thereof. This burr has a thickness of the processed material of 2 mm to 2 cm, while it is 0.3 mm from the surface.
It is about 0.01 mm.

When this burr is ground by a grinding device, the burr of the processed material is formed on only one surface, so it is necessary to supply the burr to the grinding device with the surface having the burr facing up.

As disclosed in JP-A-48-104182, as a device for automatically performing the position selection of the processed material, the processed material is transferred by a conveyor, and the processed material is once erected on its path. , The work material is sandwiched between the fixed conductive plate and the movable insulating plate from both sides, and the conductive contact pin is slightly projected from the insulating plate. If there is a burr on the insulating plate side, the conductive contact pin is processed. By utilizing the fact that it is not in contact with the material and the fixed conductive plate and the conductive contact pin are not conductive, it is judged whether there is a burr on the surface, so that the surface with a burr is located in either direction. It has been proposed that the processed material is tilted and transferred to the grinding section.

With this configuration, although it can contribute to the automation of deburring, since the processing material is temporarily stopped and this is discriminated, the supply speed of the processing material to the grinding portion is extremely slow, Not realistic. Further, since the work material is erected, and in that state, the movable insulator serving as the reference surface is pressed against the erected surface of the work material to bring the conductive contact pin into contact, the burr detection mechanism becomes complicated. There are drawbacks.

Moreover, in the said structure, it is based on the mechanical contact of a conductive contact pin. By the way, the burr of the processed material varies from 0.3mm to 0.01mm from the surface, depending on the processing conditions, and in the case of a material with a rough surface, even if there is no burr, the surface error of about 0.01mm. There is. Therefore, due to such mechanical contact that depends on the degree of protrusion of the conductive contact pin, it may not be possible to accurately determine the presence or absence of burrs, and the surface without burrs may be ground.

The present invention can automatically set the work material supplied to the grinding device so that the burr is always on the upper surface, and does not delay the feed of the work material and has a simple detection mechanism. The purpose of the present invention is to provide a sorting device provided.

<Means for Solving Problems> The present invention relates to a shooter for guiding a work material supplied from a feeder to a grinding portion of a burr grinding device that grinds an upper surface of the work material to remove burrs, and a shooter attached to the shooter. A distribution device that is installed to convert the processed material to the grinding section and a discharge position that discharges the processed material from the shooter, and is fixed to the underside of the shooter at the upstream position of the distribution device. And a non-contact type distance detection sensor that detects the distance to the lower surface of the work material by emitting electromagnetic waves from the detection end, facing the lower surface of the sliding work material, and an output signal from the distance detection sensor. Thus, if the lower surface of the processed material is a predetermined distance or more from the detection end of the distance detection sensor, it is determined that there is a burr on the surface, and if it is determined that there is a burr on the upper surface side of the processed material, Previous The distributing device at the supply position, otherwise, is made of a control unit for converting the sorting device to the discharge position.

<Operation> While the processed material supplied from the feeder slides by its own weight, the distance between the lower surface of the processed material and the detection end is detected by the non-contact type distance detection sensor. Since this distance detection sensor uses a non-contact type sensor that emits an electromagnetic wave from the detection end and detects the distance to the lower surface of the workpiece by the reflected wave, it does not interfere with the traveling of the workpiece.

At this time, since the processed material is supported by the shooter and the sliding surface of the shooter serves as a reference surface, it is not necessary to separately provide a reference surface. Further, it does not depend on the plate thickness of the processed material. Furthermore, since a shooter is used as the transportation means,
It is possible to fix the distance detection sensor directly on the lower surface and arrange the detection end toward the sliding surface side.

Based on the output from the distance detection sensor, the control device determines whether or not the distance is farther than the predetermined position, and if it is above the predetermined position, there is burr on the lower surface (there is no burr on the upper surface). If it is below the predetermined position, it is determined that there is no burr on the lower surface (there is a burr on the upper surface). According to this determination, when the burr is on the upper surface, the distribution device is set to the supply position, and the processed material is guided to the grinding unit side of the grinding device. Also, if there is no burr on the upper surface, if this is directly supplied to the grinding section, the upper surface will be ground even if there is no burr and the thickness of the processed material will be unsuitable. Switch to and discharge the processed material. The discharged processed material can be supplied to the feeder again.

Thus, only the machine having burrs on the upper surface is supplied to the grinding apparatus, and the burrs can be ground and removed.

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

Referring to FIG. 1, 1 is a grinding device,
Sanding belt 4 is stretched over 3. Further, a material feeding device 5 is provided below the grinding device 1 with a running material spacing and a driving belt 6 and a driven roller 7 around which a material feeding belt 8 is stretched.
Is provided. The traveling direction of the material feeding belt 8 intersects with the traveling direction of the sanding belt 4, and the grinding portion between the grinding device 1 and the material feeding device 5 serves as a grinding portion.

Reference numeral 10 denotes a shooter which is supported on the base by columns 12 and 12 and has its lower end positioned on the upper surface of the material feeding device 5.
The upper surface is the planing surface 11. The upper end of the shooter 10 is connected to a vibrating feeder 15 that intermittently supplies a processed material.

Next, the main part of the present invention will be described.

Regarding FIG. 2, reference numeral 20 is a non-contact type distance detection sensor for detecting the presence or absence of burrs on the processed material, which is embedded in the sliding surface 11 of the shooter 10 and the detection end thereof is positioned directly below the sliding surface 11. , Facing upwards.

The distance detection sensor 20 emits an electromagnetic wave from the detection end and detects the distance to the lower surface of the processed material by capturing the reflected wave, for example, a displacement sensor that converts the distance from the lower surface of the processed material into a voltage value. Is applied. That is, the maximum voltage is generated in a state where the detection end of the distance detection sensor 20 is not blocked on the lower surface of the work material, and a small voltage is generated corresponding to the approach distance of the lower surface of the work material. It is amplified by the amplifier 21. Therefore, as shown in FIG. 3A, when the burr x of the processed material w is on the upper surface, the lower surface runs in close contact with the sliding surface 11 of the shooter 10 and reaches the lower surface of the processed material and the detection end of the distance detection sensor 20. Is the lowest distance. Therefore, the output voltage from the distance detection sensor 20 becomes the lowest.

In addition, as this type of sensor, various sensors such as a piezoelectric wave transmitter / receiver and an optical sensor can be applied.

The processing material w applied to the present invention has a thickness of 2 mm to 2 cm,
The burr is about 0.3 mm to 0.05 mm from the surface, and may be a distance sensor having an accuracy capable of detecting such a dimension.

The case where the displacement sensor is used will be described below.

FIG. 4A shows the waveform of the output voltage from the sensor amplifier 21 accompanying the traveling of the work material w on the distance detection sensor 20 when the burr x is on the upper surface. , Its detection level l ₁ is shown to be the lowest.
When the processed material w is formed with the through holes y, y as shown in FIGS. 3 and 4, the same state as in the absence of the processed material w occurs in this gap, and the pulses a, a are generated. Occur.

On the other hand, as shown in FIG.
If there is, the lower surface of the processed material w is in a state of being lifted by the protrusion amount s of the burr x. Therefore, the distance between the lower surface of the processed material and the distance detection sensor 20 becomes longer than that in the case where the burr x is on the upper surface as described above, and the output voltage from the sensor amplifier 21 is as shown in FIG. Will be higher than.

FIG. 4B 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 11. In addition, Bali x
The front end and the rear end that are formed are the running surface of the shooter 10.
Since it is in contact with 11, the minimum voltage pulses b, b are generated instantaneously, and the pulses a, a are generated by the through holes y, y as in FIG.

The distance detection sensor 20 may convert the distance of the lower surface of the processed material into a current value.

The signal voltage (current) from the sensor amplifier 21 is the sixth
As shown in the figure, it is converted to a digital value by the A / D converter 22,
Input to central control unit CPU.

The shooter is located at a position downstream of the distance detection sensor 20.
As shown in FIG. 2, the distribution device 30 is provided in the device 10.

The allocating device 30 is a oscillating bottom plate 32 whose opening and closing is controlled around a fulcrum 33 by an oscillating cylinder 34 pivotally supported on a base so as to open and close a drop opening 31 formed in the shooter 10. It will be. That is, when the rod of the oscillating cylinder 34 is in the extended state (supply position), the oscillating bottom plate 32 blocks the drop opening 31, and the upper surface thereof is flush with the sliding surface 11 of the shooter 10, and the distance detecting sensor. 20
The work material w sliding down the shooter 10 from the side is allowed to pass, and the work material w is moved to the material feeding device 5. When the rod contracts (discharging position), the drop port 31 is opened to discharge the work material w from the shooter 10. The discharged processing material w is re-transferred to the vibrating feeder 15 by a conveyor or temporarily stored in a storage container and carried to the vibrating feeder 15.

The distribution device 30 is provided with a detector KD for confirming the passage of the processed material w on the swinging bottom plate 32. This detector
For KD, for example, a reflection type photoelectric tube switch can be applied. In this case, a light transmission hole is formed in the swinging bottom plate 32 at a position facing the detector KD, and the processed material w is When it passes under the detector KD, it is reflected by the processed material w and the arrival of the processed material w is detected. When the processed material w passes, the light is transmitted through the hole and the passage of the rear end can be detected. .

FIG. 5 shows another distribution device 30, in which side walls 13, 13 of the shooter 10 are formed with cutouts 35, 36 facing each other below the distance detection sensor 20 to form a swing cylinder 37.
A swing guide plate whose rotation is controlled around the support shaft 38 by
39 is arranged in the notch 35. In such a configuration, when the swing cylinder 37 is in the rod contracted state (supply position), the inner surface of the swing guide plate 39 is flush with the inner surface of the side wall 13 to allow the workpiece w to slide down. With the rod extended (discharging position), close the shooter 10
Is guided to the notch 36, and the processed material w is dropped from the notch 36.

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

The above-mentioned central control unit CPU controls conversion of the distribution device 30 according to the detection of the burr x by the distance detection sensor 20. That is, when it is detected that there is a burr x on the lower surface of the processed material w, the sorting device 30 is set to the discharge position, and conversely, there is no burr x on the lower surface of the processed material w (there is a burr x on the upper surface). When detected, the distribution device 30 is set to the supply position.

Further, as shown in FIG. 6, processing data with burrs is input to the central control unit CPU in advance. This is because the selection switch connected to the central control unit CPU is converted into a data input position, and the distance detection sensor 20, the sensor amplifier 21, and the A / D converter 22 are each a circuit for data processing with burrs and processed. The material w is run on the distance detection sensor 20 with the surface without burrs x as the lower surface. Then, the above detection level l ₁ is detected by such traveling. However, since the surface of the processed material w is expected to have innumerable minute irregularities, it is calculated by the central control unit CPU,
A value higher than the detection level l ₁ is set as the threshold l ₃ .

For example, as the processing material, the elliptical metal material shown in Fig. 5 is applied, the total length is 10 cm, the thickness is 5 mm, and the burr is 0.1 mm.
The measured detection level l ₁
When 0.7v is set, the threshold value l ₃ is set to 0.8v and determined by calculation processing. The threshold l ₃ is the lower surface of the processed material (shooter).
Based on 10 sliding surfaces), a value corresponding to 0.03 mm was set in consideration of the protrusion amount of the burr and the surface roughness of the metal.

Next, the control of the central control unit CPU will be described in more detail with reference to the flowcharts of FIGS.

First, the central processing unit CPU is started, the work material w from the vibration feeder 15 is supplied to the shooter 10, and the work piece w is slid down on the upper surface of the shooter 10 to the position of the distance detection sensor 20. It is determined whether or not the burr x is on the lower surface.

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

First, in step A ₁ , whether the data input from the distance detection sensor 20 to the central control unit CPU via the sensor amplifier 21 and the A / D converter 22 is at the level l _n in the absence of the workpiece w To judge. When the level is less than l _n , it is assumed that the processed material w has arrived at the position of the distance detection sensor 20, and the constant time (1/100 second to 1/1000 second) in step A ₂
Then, the measurement data starts to be stored.

By the way, when the processed material w has through holes y, y, the level l _n is detected by detecting the through holes y, y. If this is stored as it is as data, it becomes an unreasonably large value when the average value described later is output. Therefore, when the level l _n is input (step A ₃ ), the Limer Td
Sets, until the time-up, as long as the storage start command is not newly performed interrupts the storage of the measurement data (Step A _4). The time setting of the timer Td is through hole y,
Sufficient time for y to pass. By the way, if the time taken for the processed material w to pass through the distance detection sensor 20 is about 1 second, the timer Td is set to 0.3 second, for example.

That is, first, when the through hole y arrives at the distance detection sensor 20, the timer Td is set and the storage of the measurement data is interrupted. It is assumed that the timer Td is not reset during driving, and until the through hole y passes, step A ₃
Circulate through the loop of ~ A ₅ and when the through hole y passes, step
The measurement data storage is restarted by circulating the loop of A _{2 to} A ₃ . When the next through hole y comes to the position of the distance detection sensor 20 again, at this time, the timer Td has already timed up and is in the initial state, so the measurement is continued until the next through hole y escapes again. The storage of the data is interrupted, the storage is resumed after the escape, and the end of the processed material w passes. In the case of this end passage, the timer Td is similarly activated, and the stored data is processed in step A ₆ due to the time up. This data processing averages the remaining data by removing the maximum and minimum values. The maximum value and the minimum value are removed in order to remove the protruding values due to scratches on the surface of the processed material w and calculate an appropriate average value.

This average value is compared with the threshold l ₃ (step A ₇ ), and the threshold
When the value is higher than l ₃ , it is determined that there is a burr x on the lower surface of the processed material w, and when the value is low, it is determined that there is no burr x on the lower surface.

Then, the discrimination of the processed material w is completed.

In FIG. 9, a routine A and a routine R for measuring the passage time of the workpiece w are executed.

In this routine B, as shown in FIG. 9, when the front end of the processed material w arrives at the distance detection sensor 20, the process proceeds to step B ₂ to count the timer and count as the rear end of the processed material w passes. Stop and store the count time Ta (step B ₄ ). As described above, the processed material w has through holes y,
Since there is y, it is stored as the timer Td times up (this mechanism is omitted).

After passing through the routines A and B, it is judged in step in FIG. 7 whether the processed material w is on the upper surface. That is, since the distance detection sensor 20 determines whether or not there is a burr x on the lower surface of the processed material w, step A ₈ in FIG. Contraction of the moving cylinder 34 (step), swinging bottom plate
32 tilts and the drop port 31 opens. Further, in the structure shown in FIG. 5, the rocking cylinder 37 is expanded to cause the rocking guide plate.
39 tilts and shuts off the shooter 10. That is, the distribution device 30 is at the discharge position.

Also, as shown in step A ₉ in FIG.
If it is determined that the swing cylinder 34 does not exist, the swing cylinder 34 is extended (step), and the swing bottom plate 32 is in the non-tilted position, and the drop opening
31 is shut off and the rocking cylinder 37 contracts, allowing the shooter 10 to pass.

Next, the processed material w slides down the shooter 10 and is distributed.
When it reaches 30, the detector KD detects the front end of the processed material w and turns it on (step), and the timer Tb is counted.

By the way, there is a case where the processed material w gets caught in a hole or the like formed in the swinging bottom plate 32 directly below the detector KD, the traveling thereof becomes impossible, and the workpiece w stops immediately below the detector KD. Therefore, in step, it is judged whether the count value is Ta ≧ Tb or not until the detector KD is turned off (step). That is, the detector
If it is stopped under KD, the result is YES and it is recognized as an abnormal situation. In step, the sorting device 30 is set to the discharge position and all the functions such as driving stop of the vibration feeder 15 are stopped.

Further, the stopping of the processed material w may also occur on the shooter 10 between the distance detection sensor 20 and the distribution device 30.
Therefore, a time longer than the cycle time for supplying the processed material w is set in the timer Tc, and it is driven with the ON operation of the detector KD (step), and when the timer Tc is up, it is determined as an abnormal situation, Go to step. That is, in the normal state, before the timer Tc expires, the next processed material w passes the lower part of the detector KD and is turned on again, and the timer Tc is reset, so that the timer Tc does not time up. .

In a further step, even if the detector KD is turned off, the through hole y,
In order to exclude the case of the off detection by y, it is assumed that the above-mentioned timer Td is also set here and only when the time is up, the processed material w has passed the detector KD.

Thereafter, the processed material w ₁ having the burr x on the upper surface is transferred to the material feeding device 5 side, and the upper surface thereof is ground by the grinding device 1. Further, the processed material w ₂ having burrs x on the lower surface is removed from the shooter 10 and supplied again to the vibration feeder 15 (see FIG. 2).

In the above embodiment, the distance detection sensor 20 is embedded in the shooter 10 to detect the presence or absence of the burr x on the lower surface of the processed material w. However, the distance detection sensor is provided above the processed material w and the burr on the upper surface is provided. It is also possible to detect the presence or absence of x. However, the processed material w has a variation 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 upper surface is close to the distance detection sensor,
Further, if the thickness is less than or equal to a predetermined value, even if there is no burr, it is determined that there is a burr because the upper surface thereof is separated from the distance detection sensor. For this reason, unlike the method of detecting the burr of the lower surface of the processed material w of the present invention, the threshold value cannot be simply set, and the control becomes complicated.

<Effect of the Invention> As described above, the present invention detects the state of the lower surface of the workpiece w by the distance detection sensor, determines the signal from the distance detection sensor by the control device, and gives a command to the distribution device. Since the distributing device guides the processed material to the grinding portion side of the grinding device only when the top surface has the burr x, the following effects can be obtained.

(1) The work material slides continuously by the shooter and detects the lower surface of the work material w in the running state, and therefore, the supply speed to the grinding portion does not become stagnant.

(B) Since a shooter is used as the conveyance means, it is possible to fix a non-contact type distance detection sensor that radiates electromagnetic waves from the detection end to the lower surface of the shooter and detects the distance to the lower surface of the processed material by the reflected wave. Becomes And for this reason,
Since the sliding surface of the shooter can be used as the reference surface, a separate reference surface is not required and the structure is simplified. Further, even if there is a variation in the thickness of the processed material w, it is not affected and proper burr detection can be performed.

(C) Since a non-contact type distance detection sensor that emits electromagnetic waves from the detection end and detects the distance to the bottom surface of the processed material by the reflected waves is applied, unlike the case of conductive contact pins, burr detection is not possible. It is accurate.

D, The processing materials are automatically selected, which can contribute to the automation of the deburring device.

[Brief description of drawings]

FIG. 1 is a schematic side view of a deburring device, FIG. 2 is a vertical side view of a sorting device, and FIG.
FIGS. 1A and 1B are enlarged vertical side views of the distance detection sensor 20 showing a detection mode, FIG. 4 is a waveform diagram shown in comparison with the shape of the processed material w, and FIG. 5 is a plan view showing another distribution device 30. FIG. 6 is a block diagram, and FIGS. 7 to 9 are flowcharts. 1; Grinding device, 5; Material feeding device, 10; Shooter, 15; Vibration feeder, 20; Distance detection sensor, 30; Sorting device, 31; Drop port, 32; Swing bottom plate, 34; Swing cylinder, 37; Swing cylinder, 39; Swing guide plate, KD; Detector, CPU; Central control unit,
w: processed material, x: burr, y: through hole

Claims (1)

[Scope of utility model registration request] 1. A shooter for guiding a work material supplied from a feeder to a grinding portion of a burr grinding device for grinding a top surface of the work material to remove burrs; and a shooter attached to the shooter to a grinding portion of the work material. The distribution device that is converted into a supply position that enables the traveling of the work piece and a discharge position that discharges the work material from the shooter, and an upstream position of the distribution device that is fixed to the lower surface of the shooter and is attached to the lower surface of the sliding work material. Opposing, radiating electromagnetic waves from the detection end, the non-contact type distance detection sensor for detecting the distance to the work material lower surface by the reflected wave, and the output signal from the distance detection sensor, the work material lower surface, If it is a predetermined distance or more from the detection end of the distance detection sensor, it is determined that there is a burr on the surface, and if it is determined that there is a burr on the upper surface side of the processed material, the sorting device is placed at the supply position. In the case of the workpiece sorting device in deburring device comprising a control unit for converting the sorting device to the discharge position.