JPH0425104B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for automatically detecting burrs on a press punched product and for determining the direction of burrs on a press punched product.

(Prior Art) Press punching produces burrs on the punch side due to its manufacturing process, so burrs are usually removed from press punched products by etching, sandblasting, belt grinding, etc. Of these, etching and sandblasting are of limited use due to their nature, and only belt grinders are widely used for removing burrs. 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 burr directions, workers had to visually detect this and align the burr directions. This has 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 burrs, and as a result has obtained the following findings. 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 side opposite to the direction of the burr. The tip of the burr is sharp, but the sagging portion is rounded, and when light is irradiated to the burr 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 reflected light at sagging areas, but no peak occurs at areas with burrs because the light from the light source does not directly enter the image sensor.

The present invention has been made based on such knowledge, and an object thereof is to provide a burr direction determination method that can automatically detect the burr direction using an image sensor.

(Means for solving the problem) 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 this image sensor to measure 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 burr on the edge irradiated with light, and if there is a peak in the reflection intensity distribution, it is detected that the edge irradiated with light has a burr on the opposite side of the burr direction. This is a burr direction determination and reversal direction of a press punched product in which a sagging part is detected, and then the press punched product is reversed based on the detection of the presence or absence of burrs.

(Example) The present invention will be described below based on an illustrative example.

FIGS. 1 and 2 show a line in which the burr direction of the press punched product is determined, the burr directions are aligned, and the product is polished. In this line, the press punched products P are sent to the feeding chute 1, and are vibrated so that the press punched products are separated without overlapping.
guide it inward and align the press punched products. Next, the feed gate 4 is opened based on the detection signal from the control sensor 3, and the press punched products are sent one by one to the chute 5.
drop it on The press punched products sent from the chute 5 are passed through the gate 6 for fixed pitch feed at regular intervals.
Send it onto conveyor 7. Next, among the press punchings on the first conveyor 7, those that are not normal are removed by the abnormal punching detection and discharge device 17, and then guided to a burr direction discriminator 8 to determine the burr direction. Thereafter, the press punched product is turned over by a reversing machine 9 according to the burr direction, and sent onto the second conveyor 10 with the burr directions aligned. Then, the press punched product with the burr direction aligned is polished by a polisher 11 to remove burrs.

In this line, the burr 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 floodlight 12 is connected to the first conveyor 7
Light is irradiated obliquely from above onto the edge portion of the press punched product above, and the image sensor 13 is used to detect the intensity of the reflected light from the edge portion.

If the burr 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, when the burr part a is located at the upper part as shown in FIG. 6, the peak of the irradiation intensity does not occur at the edge part as shown in FIG. 7, and the surface becomes substantially smooth.

In this way, the direction of the burr, that is, whether the burr is at the top or the bottom, is detected based on the presence or absence of a peak.

On the other hand, the reversing machine 9 operates based on a signal from the burr direction discriminating machine 8 of the press punched product P, and as shown in FIG. and a reversing guide plate 15 is provided between the first conveyor 7 and the second conveyor 10, and the reversing guide plate 15 is placed in the position shown by the solid line when reversing is not required (for example, when there is a burr at the top), and when reversing is necessary. (For example, if the burr is located at the bottom), move it to the position shown by the two-dot chain line and reverse the press punched product. In addition, 16 in the figure is a press punched product passage confirmation sensor.

(Effects of the Invention) However, according to the discrimination method of the present invention, the burr direction 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 drawings]

Fig. 1 is a schematic plan view of a line for determining, reversing, and polishing the burr direction of a press punched product according to an embodiment of the present invention, Fig. 2 is a front view of the same, and Fig. 3 is an explanation of the burr direction discriminating device. Figures 4 and 5 are explanatory diagrams of the operation of the burr direction discriminating device when the burr is at the bottom, and Figures 6 and 7 are explanatory diagrams of the operation of the burr direction discriminating device when the burr is at the upper part. FIG. 8 is an explanatory diagram of the operation of the reversing machine. 1... Feeding chute, 2... Guide board, 3...
Control sensor, 4... feed gate, 5... chute, 6... constant pitch feed gate, 7... first
Conveyor, 8... Burr direction discriminator, 9... Reversing machine, 10... Second conveyor, 11... Polishing machine, 1
2... Floodlight, 13... Image sensor, 14...
...Gate, 15... Reversing guide plate, 16... Passage confirmation sensor.

Claims (1)

[Claims] 1. Light is irradiated onto the edge of a 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 when there is no peak in the reflection intensity distribution, the light is emitted. It detects that there is a burr on the irradiated edge part, and if there is a peak in the reflection intensity distribution, it detects that the irradiated edge part is the punching sag part on the opposite side to the burr direction,
A method for determining burr direction and reversing a press punched product, which then reverses the press punched product based on detecting the presence or absence of burrs.