JPH03128405A - Feed quantity detecting device for material of forming machine or the like - Google Patents

Abstract

PURPOSE:To easily monitor the feed quantity of the material in a free-maintenance state without contacting when the material is supplied automatically and to securely detect abnormality of the feed quantity of the material by providing a light emitting means, a light receiving means, a speckle pattern analyzing means, a tolerance decision means, and an output means. CONSTITUTION:The light emitting means 1 irradiates the surface of the material 6 with laser light in the forming machine, etc., wherein the material such as a steel material is supplied automatically and the light receiving means 2 receives its reflected laser light. The speckle pattern analyzing means 3 detects the speckle pattern of the surface of the material 6 from a light reception signal inputted from the light receiving means 2 and calculates the movement quantity of the material from the displacement quantity of the speckle pattern. The tolerance discrimination means 4 compares the movement quantity of the material operated by the analyzing means 3 with a set value and outputs the comparison result and the output means outputs the comparison result of the tolerance discrimination means 4. Consequently, the state wherein the material such as the steel material is supplied automatically by a specific feed quantity in the forming machine, etc., is monitored and when the material is misfed by a wrong quantity, an alarm is generated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device for monitoring the amount of material fed when rolled steel materials such as coil materials and hoop materials are automatically supplied to a forming machine, etc. It is.

[Conventional technology]

When automatically feeding rolled materials such as coil materials and hoop materials to forming machines and other machine tools, there are two types of feeders: roll feeders, which feed materials using the rotational force of two rolls, and air feeders. It consists of an air cylinder, a movable clamp, and a fixed clamp, and there is one that feeds the material using the air cylinder's stroller.

In either case, there is a problem in that the feed rate of the material supply is not stable and the quality of the processed product cannot be kept constant.

For example, in the case of a roll feeder, there is a possibility that slippage may occur between the roll and the material, which makes the feed rate of the material unstable.

In addition, in the case of an air feeder, the amount of material fed varies depending on the accuracy of the grip of the movable clamp or the fixed clamp, the accuracy of the stroke of the air cylinder, etc.

For this reason, the rollers are placed so that they are in contact with the material surface,
There is a method of attaching an encoder to the shaft of this roller, converting the amount of movement of the material into a pulse signal generated by the encoder, and detecting the amount, thereby monitoring the amount of material fed.

However, in this case as well, the roller provided with the encoder and the material are in contact, and in order to rotate the roller smoothly, it is necessary to adjust the contact pressure between the material and the roller. This poses a problem in that measurement errors occur due to slips and other rotational defects.

[Problem to be solved by the invention]

When a rough surface or a non-uniform medium is irradiated with highly coherent light such as a laser beam and the scattered light is observed, the intensity distribution of the light becomes random and the surface or medium takes on a granular appearance. This pattern is known as a speckle pattern.

Although the steel materials such as hoop materials and coil materials that are automatically supplied to forming machines and other machine tools have smooth surfaces, they always have minute distortions and irregularities.
A speckle pattern is produced by irradiation with laser light.

In view of the above problems, the present invention monitors whether materials such as steel are automatically supplied at a predetermined feed rate in a forming machine etc. by detecting the amount of displacement of this speckle pattern, and adjusts the feed rate. The object of the present invention is to provide a material feed rate detection device for a forming machine or the like that generates a warning when a mistake occurs.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a light emitting means for irradiating a laser beam onto the surface of the material, and a light receiving means for receiving the laser beam reflected on the surface of the material, in a forming machine or the like in which materials such as steel are automatically supplied. a speckle pattern analysis means for detecting a speckle pattern on a material surface from a light reception signal inputted from the light reception means and calculating a movement amount of the material from a displacement amount of the speckle pattern; and a speckle pattern analysis means. A feed rate of material in a forming machine, etc., which has a difference determining means for comparing the moving amount of the material calculated by with a set value and outputting the comparison result, and an output means for outputting the comparison result of the difference determining means. This constitutes a detection device.

Here, a laser light emitting element can be used as the light emitting means, and a CCD can be used as the light receiving means.

[For production]

The material feed amount detection device for a forming machine or the like according to the present invention has the above-described configuration, and the light emitting means irradiates the material surface with laser light, and the light receiving means receives the laser light reflected on the material surface. The signal is input to speckle pattern analysis means.

The speckle pattern analysis means converts the received light signal into a speckle pattern on the material surface, detects the amount of displacement of this speckle pattern, calculates the amount of movement of the material, compares it with a set value, and outputs the comparison result. It is output to a means.

〔Example〕

The details of the present invention will be explained based on illustrated embodiments.

FIG. 1 is a diagram corresponding to complaints regarding the material feed amount detection device in a forming machine or the like according to the present invention.

That is, the material feed rate detection device for a forming machine or the like of the present invention includes a light emitting device 1 that irradiates a laser beam onto the surface of the material 6 that is automatically fed, and a light receiving device 2 that receives the laser beam reflected from the surface of the material 6. a speckle pattern analysis means 3 that detects a speckle pattern on the surface of the material 6 from the light reception signal inputted from the light reception means 2, and calculates the amount of movement of the material 6 from the displacement amount of the speckle pattern; It has a difference determining means 4 that compares the movement amount of the material 6 calculated by the pattern analysis means 3 with a set value and outputs the comparison result, and an output means 5 that outputs the comparison result of the difference determining means 4. It is something.

FIG. 2 is a simplified block diagram for detailed explanation of the invention.

That is, it consists of a sensor section 11 disposed near the material 6 that is automatically supplied to a forming machine or the like, and a controller/roller section 12 into which signals from the sensor section 11 are input.

The sensor 11 is provided with a laser light emitting element 13 that irradiates the surface of the material 6 with laser light, and this may be a semiconductor laser, a gas laser, or other various light emitting elements.

Reference numeral 4 is a light-receiving element that receives laser light reflected from the surface of the material 6, and this light-receiving element 14 can be a CCD or other photoelectric conversion element.

The controller section 12 has a speckle pattern analysis circuit 15 to which the light reception signal is input from the light reception element 14, which detects the speckle pattern on the surface of the material 6 from the light reception signal and calculates the amount of displacement of this speckle pattern. The calculated value is input to the difference determination circuit 16 as the amount of movement of the material 6.

The allowable range of the amount of movement of the material 6 can be input to the difference determination circuit 16 as a difference setting a, and the difference determination circuit 16
compares the movement amount of the material 6 inputted from the speckle pattern analysis circuit 15 with this difference setting a, and outputs the comparison result to the output means.

The difference setting a can be set for any feed amount, and any value can be selected depending on the size of the processed product.

As the output means, the display section 17 attached to the controller section 12 can be used, for example, a liquid crystal, LE
D. It is possible to digitally display the amount of movement of the material 6 using a fluorescent display tube, etc., and using a two-color LED,
It is also possible to light up green when the operation is normal, and light up red when there is an abnormality in the amount of movement of the material 6.

In addition, as an output means, two output terminals 0+, , O2 are provided separately from the display section 17, and if the difference exceeds the difference as a result of comparison by the difference discrimination circuit 16, a signal is output to the output terminal 01 as an excessive feed amount. However, if the difference falls below the range, a signal can be output to output terminal O2 indicating that the feed amount is insufficient.If an alarm buzzer or lamp is connected to output terminals 01 and O2, abnormalities in the feed amount of material 6 can be detected. It is possible to give a warning.

Of course, these output means are not particularly limited, and various types can be used.

This feed amount monitoring is performed when the timing manual force t is applied, and the display section 17 displays the result until the next result is obtained.

FIG. 3 is an explanatory diagram of the installed state of the embodiment of the present invention.

Reference numeral 21 denotes a material supply section that supplies materials such as hoop materials and coil materials.
The material 6 is supplied by.

A feeder 23 is a roll feeder or an air feeder, and feeds the material 6 to the forming machine 24 at a predetermined feed rate.

In the apparatus of the present invention, a sensor section 11 is installed on the material supply side of the forming machine 24 so as to irradiate the surface of the material 6 with laser light and receive reflected light, and the controller section 12 is visually visible on the display section 17. It is to be installed in an appropriate location.

From this, the feed rate of the feeder 23 is monitored to detect defective processed products.

〔Effect of the invention〕

The material feed rate detection device for a forming machine, etc. according to the present invention is configured as described above, and can monitor the material feed rate in a non-contact manner, easily and without maintenance during automatic material supply, and can reliably monitor the material feed rate. This makes it possible to detect abnormalities in the feed amount.

From this, it is possible to detect a 4° defective processed product caused by an abnormality in the feed amount before it is mixed with non-defective products, and it is possible to reduce the number of inspection steps for processed products.

Furthermore, by detecting an abnormality in the amount of material fed, it is possible to manage forming machines, feeders, and other equipment depending on the frequency of abnormalities, excess or deficiency in the amount of material fed, etc.

In the present invention, the speckle pattern on the surface of the material is sensed by irradiating the laser beam, and the amount of material movement is detected from the amount of displacement. Therefore, highly accurate measurement is possible, and minute deviations in the amount of movement can be detected. It also becomes possible to detect.

[Brief explanation of the drawing]

Fig. 1 is a diagram corresponding to complaints of the material feed rate detection device in a forming machine etc. according to the present invention, Fig. 2 is a simplified block diagram for detailed explanation of the present invention, and Fig. 3 is an installation state of an embodiment of the present invention. It is an explanatory diagram. 1. Light emitting means, 2. Light receiving means, 3. Speckle pattern M analysis. 4: Differential discrimination means, 5: Output means, 6: Material,
11: Sensor section, 12: Controller section,
13: Light emitting element, 14: Light receiving element, 15: Speckle pattern analysis circuit, 16: Difference discrimination circuit, 17: Display section, 21: Material supply section, 22: Supply roller, 23: Feeder, 24: Forming machine. Figure 1 Figure 3 Figure 2

Claims (1)

[Scope of Claims] 1) In a forming machine or the like in which materials such as steel are automatically supplied, a light emitting means for irradiating the material surface with a laser beam, a light receiving means for receiving the laser light reflected on the material surface, and the light receiving means. speckle pattern analysis means for detecting a speckle pattern on a material surface from a light reception signal inputted from the means and calculating the amount of movement of the material from the amount of displacement of the speckle pattern; A material feed amount detection device for a forming machine or the like, comprising: a difference determining means for comparing the moving amount of the material with a set value and outputting a comparison result; and an output means for outputting the comparison result of the difference determining means. 2) Material feed amount detection means in a forming machine or the like according to claim 1, which utilizes a laser light emitting element as the light emitting means. 3) A material feed rate detection device in a forming machine or the like according to claim 1 or 2, which uses a CCD as a light receiving means.