JPS6120842A - Discriminating method of burr direction of press punched article - Google Patents

Abstract

PURPOSE:To discriminate a burr direction by irradiating an edge part of the press punched article and detecting the intensity distribution of reflected light through an image sensor. CONSTITUTION:A projector 12 and the image sensor 13 are arranged at specific position above the press punched article P to constitute a burr direction discriminating machine. Then, the edge part of the punched article P is irradiated with light by the projection 12 and the intensity of reflected light from the edge part by the sensor 13. If there is a burr part (a) on the reverse of the punched article P, the light illuminates a roll-over part on the top and the sensor 13 detects the peak of the intensity of reflected light from the roll-over part (b). When there is the buur on the top, the intensity of the reflected light from the edge part has no peak and is almost smooth. Thus, it is decided which side of the top and reverse parts the burr part is formed from whether the reflected light intensity has a peak or not.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for determining the direction of deformation of a press punched product, which automatically detects the deformation of the press punched product.

(Conventional technology) Due to the manufacturing method of press punching, there is a gap on the punch side, so
Usually etching, sandblasting.

The edges of the press punched product are removed using a belt grinder or the like. Of these, etching and sandblasting are of limited use due to their nature, and only belt grinders are widely used for removing particles. To remove burrs with a belt grinder, it is necessary to align the burrs in a certain direction (for example, the top or bottom). Conventionally, in order to align the direction of separation, a worker had to visually detect this and align the direction of separation. This resulted in poor workability and high manufacturing costs.

(Problems to be Solved by the Invention) Therefore, the present inventor has researched the use of a so-called image sensor as a device for determining the direction of Paris, and as a result has obtained the following knowledge.

That is, the press punched product has a burr on one side of its edge portion, but a punching sag portion is formed on the opposite side to the burr direction. The tip of Paris is pointed, but the sagging part is rounded,
When light is irradiated onto the paris and the sagging portion, the directions of reflection are completely different. In particular, it was found that when the light source and image sensor are arranged appropriately, a peak occurs in the intensity distribution of the reflected light in the sagging area, but in certain parts of Paris, the light from the light source does not directly enter the image sensor, so no peak occurs.

The present invention was made based on such knowledge, and its purpose is to provide a method for determining the Paris direction that can automatically detect the Paris direction using an image sensor. .

(Means for Solving the Problems) That is, the present invention irradiates the edge portion of a press punched product with light, inputs the reflected light to an image sensor, and uses the image sensor to calculate the distribution of the reflection intensity of the reflected light. If there is no peak in the reflection intensity distribution, it is detected that there is a paris at the irradiated edge part, and if there is a peak in the reflection intensity distribution, the irradiation edge part is opposite to the pari direction. This is a method for determining the flat direction of a press punched product by detecting a side punching sag part.

(Example) The present invention will be described below based on illustrated embodiments.

FIG. 1 and FIG. 2 show lines for determining the direction of the press punched product, aligning the direction of the point, and polishing the product. In this line, press punched products P are sent to a feeding chute 1, vibrated, guided into a guide plate 2 while separating the press punched products without overlapping, and aligned. Next, the feeding dart 4 is opened based on the detection signal from the control sensor 3, and the press punched products are transferred one by one to the chute 5.
drop it on The press punched products sent from the chute 5 are fed onto the first conveyor 7 at regular intervals by a constant pitch feeding f-)6. Next, among the press punchings on the first conveyor 7, abnormal punchings are removed by the abnormal punching detection and discharge device 17, and then guided to the cutting direction discriminator 8 to determine the cutting direction. After that, the press punched product is passed through a reversing machine 9 to be reversed according to the direction of separation, and then transferred to a second conveyor 10 with the direction of separation aligned.
Send it up.

Then, the press punched product with the edges aligned is polished by a polishing machine 11 to remove the edges.

In this line, the Paris direction discriminator 8 is constructed by arranging a projector 12 and an image sensor 13 at a predetermined position above the first conveyor 7, as shown in FIG. The light projector 12 irradiates the edge portion of the press punched product on the first conveyor 7 with light obliquely from above, and the image sensor 13 detects the intensity of the reflected light from the edge portion.

Here, if the edge part a of the press punched product P is at the bottom as shown in FIG. Detect the peak of the irradiation light intensity at the On the other hand, Paris A is the 6th
If it is located at the top as shown in the figure, the peak of irradiation intensity does not occur at the edge portion as shown in FIG. 7, and the surface becomes almost smooth.

In this way, the direction of the paris, that is, the paris is at the top,
Or, whether it is at the bottom is detected by the presence or absence of a peak.

On the other hand, the reversing machine 9 is operated based on a signal from the machine 8 for determining the direction of press punching P, and as shown in FIG. and the first conveyor v and the second conveyor 1o
A reversing guide plate 15 is installed between the two, and when reversing is not required (for example, when the burr is at the top), K is at the position shown by the solid line, and when reversing is necessary (for example, when the paris is at the bottom), K is set at 2. The press punched product is reversed by moving it to the position indicated by the dotted chain line.

Note that 16 in the figure is a sensor for confirming passage of press punched product 1.

(Effects of the Invention) However, according to the discrimination method of the present invention, the direction of separation can be automatically detected, and based on this detection, the press punched product can be reliably reversed without manual intervention, thereby saving labor. can.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of a line for performing 2-inverting and polishing of a press punched product showing an embodiment of the present invention; Fig. 2 is a front view thereof; and Fig. 3 is an explanation of a paring direction determining device. Figure, 4th
5 and 5 are explanatory diagrams of the operation of the paris direction discriminating device when the paris section is at the bottom, FIGS. 6 and 7 are explanatory diagrams of the operation of the paris direction discriminating device when the paris section is at the top, and FIG. The figure is an explanatory diagram of the operation of the reversing machine. DESCRIPTION OF SYMBOLS 1...Chute for feeding, 2...Guide plate, 3...Sensor for control, 4...F-) for feeding, 5...Chute,
6... Constant pitch feeding dart, 7... First conveyor, 8... Paris direction discriminator, 9... Reversing machine, 10...
・Second conveyor, 11... Polishing machine, 12... Floodlight, 13... Image sensor, 14... Dirt, 15
... Reversing guide plate, 16... Passage confirmation sensor. Applicant's representative Patent attorney Takehiko Suzue No. 1 @ Figure 3 Figure 7 Figure 8

Claims (1)

[Claims] Light is irradiated onto the edge of the press punched product, the reflected light is input to an image sensor, the image sensor detects the distribution of the reflection intensity of the reflected light, and irradiates light if there is no peak in the reflection intensity distribution. It detects that there is a burr on the edge of the press-cut product, and if there is a peak in the reflection intensity distribution, it detects that the edge irradiated with light is the punching sag part on the opposite side of the burr. Direction determination method.