JPS63168242A - Defective product rejection device attached to wire rod working device - Google Patents

Abstract

PURPOSE:To make a wire rod having no defect at all by providing on a defective product rejection device, a marking detection device and the alarming circuit generating an alarm output in the case of being different by comparing the number of marking pieces detected by this detection device with the preset number of pieces. CONSTITUTION:The defective product rejection device 13 to be attached to a wire rod working device 14 is composed of a marking detection device 15, control device 16 and alarm lamp 17. The marking is detected by projecting a light on a wire rod 18 by the marking detection device 15. The generated number of markings is compared with the number of pieces preset by the control device 16 and in the case of being different an alarm is outputted by the alarm lamp 17. The marking of the wire rod 18 cut in the specified length by the wire rod working device 14 is shifted in the specified times after detection and dropped into a container 38. The nondefective product detecting no marking is discharged into a container 39. The product having no defect at all can thus be offered.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is attached to a wire processing device, detects markings attached to defective parts, and eliminates defective products manufactured by the wire processing device. It is related to the device.

[Conventional technology]

In order to manufacture bolts and the like in large quantities, wire rods of a predetermined size are fed to a header machine, which cuts them into a predetermined length and simultaneously shapes them into a predetermined shape.

The wire used as the above material needs to be of a specified size depending on the type of bolt, etc., so thick wire is passed through a wire drawing machine and formed into the specified size, but the wire may be damaged during this drawing process. Equal defects may occur, and if wire rods with such defects are used to manufacture bolts, etc. using the ladder machine described above, defective bolts, etc. will be manufactured, and the bolts, etc. will be used as automobile parts. There was a danger that if used as such, it could lead to an accident.

Therefore, as shown in FIG. 5, the wire 10 drawn by the wire drawing machine is passed through an eddy current flaw detector 11, and fluorescent paint is applied to the defective part by a marking machine I2 so that the defective part can be easily identified from the outside. I have to.

Workers then used a grinder to repair the scratches in the marked portions, redraw them, and use them as wire rods with smaller diameters.

[Problems to be Solved by the Invention] However, the above-mentioned wire drawing is expensive, and furthermore, even if the wire is drawn again, it does not necessarily result in a wire without defects, so it is difficult to manufacture a product without defects as a whole. There was a problem that efficiency was extremely low and it was difficult to manufacture products with a high yield. Therefore, the present inventor previously proposed in Japanese Patent Application No. 61-254253 that a wire rod with markings on the defective portions described above is used to manufacture a product almost completely free of defective portions. This is usually done by applying paint to the defect.
Markings may be partially peeled off during packaging of wire rods,
There were problems such as malfunctions in marking detection.

The above-mentioned problems have been explained in relation to the manufacture of bolts, but they are common to parts made of wire rods.

The present invention has been made in view of the above circumstances, and provides a defective product removal device attached to a wire processing device that can use a wire with marked defective parts to obtain a completely defect-free product. The purpose is to

[Means to solve problems]

The defective product removal device attached to the wire processing device according to the present invention, which achieves the above purpose, continuously inserts and cuts wire rods whose defective portions have been detected and marked at the defective portions in advance, and cuts them into predetermined objects. A marking detection device attached to a wire processing device to be processed, which is installed at the front of the wire processing device and detects the markings by irradiating the wire with light, and the number of markings detected by the marking detection device. and an alarm circuit that compares a preset number of markings and issues an alarm output if the number of markings detected by the marking detection device differs from the preset number of markings.

Here, the wire processing device may be any device that cuts wire rods into predetermined lengths and shapes them, and the light that irradiates the markings is not necessarily limited to visible light; for example, ultraviolet rays. Alternatively, the present invention is also applicable to infrared rays.

[Effect]

Since the defective parts of the supplied wire are marked, the defective product rejecting device attached to the wire processing apparatus according to the present invention irradiates the markings with light to detect the markings, and also detects the markings by irradiating the markings with light. A product is manufactured by passing a certain wire rod through a wire processing device as it is.

Then, based on the signal detected by the marking, a shift signal corresponding to the processing process of the wire processing device is generated, and the shift signal drives a removal mechanism that removes the product discharged to the rear of the wire processing device. Therefore, as long as the shift signal is generated accurately, products manufactured from wire rods with defects can be eliminated, and only good products can be selectively manufactured.

〔Example〕

Next, an embodiment embodying the present invention will be described with reference to the attached drawings to provide an understanding of the present invention.

Here, FIG. 1 is a schematic side view of a wire processing device equipped with a defect removal device according to an embodiment of the present invention, and FIG. 2 shows markings of the defect removal device attached to the wire processing device on the detection part. A schematic side view, FIG. 3 is a schematic block diagram showing an electric circuit of a defective product removal device attached to the wire processing apparatus, and FIG. 4 is a flowchart showing the operating state of the control section in the block diagram.

As shown in FIG. 1, a defective product elimination device 13 attached to a wire processing device according to an embodiment of the present invention includes a marking detection bag 215 attached to the front part of a header machine 14, which is an example of a wire processing device. , an attached control section W16, and an alarm lamp 17 activated in response to an alarm output from the control device 16. These will be explained in detail below.

The headermanship 14 takes in and cuts the coiled wire 18 at a predetermined pitch by a predetermined shift signal,
It is designed to be formed into a bolt of a predetermined length.

As described above, the wire supplied to the header machine 14 has a defective part having a defective part detected by the eddy current flaw detector 11, and then a fluorescent paint is applied to that part by the marking machine 12. Since the number of defective parts, that is, marking parts, in the wire rod 18 manufactured by such a process is known, the number of defective parts is indicated on the wire rod 18 by a specific means (for example, a tag), etc. shall be taken as a thing.

As shown in FIG. 2, the marking detection device 15 consists of a lamp 19 that generates ultraviolet rays (visible light or infrared rays are also acceptable) and its lens 20, and a photodetector that converges the reflected light from the wire 18 with a lens 21 and 22. The wire rod 18 has a transistor 23, which detects the paint applied to the outer circumference of the wire rod 18 and generates a signal.

Here, direct current may simply be used as the power source for the lamp 19, but it is preferable to apply modulation (for example, alternating current with a constant frequency) to distinguish it from disturbance light.

The control device 16 includes an input/output interface 24 that receives signals from the marking detection device 15 as shown in FIG.
, a control section 25 and a display section 26 connected to the input/output interface 24, and a preset section 27 connected to the control section 25. signals) are connected via an input/output interface 24.

The main operations of the control unit 25 will be explained with reference to FIG. 4. First, when the signal from the marking detection device 15 enters the control unit 25 via the input/output interface 24, it is checked in a first step 28). , the shift signal from the header machine 14 is received a predetermined number of times (second step 29), and at this stage the signal from the marking detection device 15 is checked again (third step 30). If this signal is confirmed, it is determined that there is a marking. (fourth step 31). In the above, the predetermined number of shift signals is usually 3
~ 4 shift signals.Also, once a marking is detected in this way, and after an appropriate number of shift signals, it is confirmed that there are more markings, and the marking output is output. If it peels off and adheres to other parts, the length of the marked part is short, so the signal will be lost by the shift of the header machine 14, and the length of the marked part of the normal defective part will be at least 4001 or more. Therefore, the length of one shift is usually 10
0++n), so the marking can be detected even after 3 to 4 shifts.Next, if no marking output is detected in the third step 30, this is because the marking has partially peeled off. , no marking output signal will be generated, and the first step 28
The process returns to wait for the next marking detection signal.

In addition, if necessary, it is also possible to perform a process similar to the above process, that is, once no marking is detected, after a predetermined shift, confirm that there is no marking again and generate an output with no marking, This is to prevent marking output generated by the adhered paint at short intervals from marking this part as a defective part.

In this way, the generated marking presence signals are counted by the counter (fifth step 32), and after all the wires for one coil have been supplied, the preset section 27
(6th step 33). If they are the same, a good signal is sent (7th step 34), but if they are different, an alarm is issued (8th step 35).

Next, to explain the operation of the header machine 14, when a marking is detected by the marking detection device 15, that part of the wire 18 is determined to be a defective part, but it is sent to the header machine 14 as is. It will be done. However, since the header machine 14 cuts the wire into a predetermined length and processes it into a header, the length of the product is cut and the length becomes the shift length.The number of times this happens varies depending on the header machine 14, but it is a constant value. becomes. Therefore, if the line 18 is shifted a predetermined number of times after detecting the marking, the product will be discharged from the outlet 36 of the header machine 14. In this case, the cylinder 37 will be driven to drop the product into the container 38. Next, marking detection device 14
If no marking is detected, a normal product will be discharged to the dispensing port 36 after a predetermined number of shifts, so operate the cylinder 37 to flow the product toward the container 39. γ goo machine 14 by operation
It is possible to eliminate defective products from processed products, but as mentioned above, there are malfunctions due to adhesion or peeling of paint, so we compare the number of markings shown in advance with the actual value and check if they match. If not, it means that there are defective products among the good products, so by inspecting all the good products, it is possible to completely eliminate defective products.

Note that 18a in FIGS. 2 and 3 indicates markings.

〔Effect of the invention〕

As is clear from the above explanation, the defective product removal device attached to the wire processing device of the present invention uses a wire whose number of markings is known in advance, and counts the number of markings again in the wire processing device. Since a warning is issued if the marking detection device differs from the set value, it is now possible to provide products with complete quality control even if the marking detection device malfunctions.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a wire processing device equipped with a defective product removal device according to an embodiment of the present invention, and FIG. 2 is a schematic side view of the marking detection portion of the defective product removal device attached to the wire processing device. , FIG. 3 is a schematic block diagram showing the electric circuit of the defective product removal device attached to the wire processing device, FIG. 4 is a flowchart showing the operating state of the control section in the above block diagram, and FIG. 5 is a conventional example. It is a side view of the apparatus which attaches a marking to the wire rod. [Explanation of symbols] 14-・・−・−・−Header machine (wire processing equipment)
, 15-...-marking detection device, 16-...
--・Control device, 1 'L---------Warning lamp, 1
Japan...-Wire rod, agent, patent attorney, Fujio during his lifetime Figure 4

Claims (3)

[Claims] (1) A device that is attached to a wire processing device that continuously inserts and cuts wire rods that have been detected for defective parts in advance and marked the defective parts and processed into predetermined products, and is attached to the wire processing equipment. a marking detection device provided at the front portion that irradiates the wire with light to detect the markings; and a marking detection device that compares the number of markings detected by the marking detection device with a preset number of markings and detects the markings by the marking detection device. 1. A defective product removal device attached to a wire processing device, comprising an alarm circuit that issues an alarm output when the number of marked markings differs from a preset number of markings. (2) After the marking detection device once detects the marking, it shifts the wire a predetermined number of times, and then generates an output indicating that the marking is present after confirming that the marking is detected. A defective product removal device attached to the wire processing device described above. (3) A defective product removal device attached to a wire processing device according to claim 1 or 2, wherein the wire processing device is a header machine.