KR101948684B1 - Defective products processing system and method of processing defective products using the same - Google Patents

Abstract

The present invention relates to a workpiece defect processing system comprising: a transfer unit having a transfer belt circulating in an endless track through a plurality of support rollers installed to be separated from each other to transfer a workpiece; an inspection unit installed on a moving path of the workpiece to determine whether the workpiece is defective or not; a defect processing unit installed on the rear side of the inspection unit with respect to the movement direction of the workpiece to discard the workpiece determined to be defective by the inspection unit; an encoder provided in the transfer unit to periodically generate a pulse signal according to the movement of the transfer belt to sense the movement of the workpiece; and a control unit for transmitting a discarding operation signal to the defect processing unit or a worker to discard the workpiece when the workpiece determined to be defective by the inspection unit is adjacent to the defect processing unit on the basis of the signal provided from the encoder. The encoder provides, to the control unit, only a first pulse signal generated when the workpiece is supplied to a supply point of the transfer belt provided in front of the inspection unit, and a second pulse signal generated when the workpiece arrives at an arrival point adjacent to the defect processing unit, in order to identify the workpiece among generated pulse signals.

Description

TECHNICAL FIELD [0001] The present invention relates to a defective processing system and a defective processing method using the defective processing system.

The present invention relates to a faulty processing system for a workpiece and a method for processing a faulty workpiece using the same, and more particularly, to a faulty processing unit for supplying a workpiece among pulse signals of an encoder for detecting a transfer of a workpiece, To the control unit.

In general, a vision inspection apparatus for inspecting an object moving on a conveyor with a camera is provided with a conveyor for conveying an object to be inspected and a camera for inspecting an upper part of the object to be inspected.

A conventional vision inspection apparatus includes a workpiece to be inspected, a camera for inspecting an upper portion of the workpiece, a light for illuminating the upper portion of the workpiece to inspect the upper portion of the workpiece, and a conveyor for conveying the workpiece. Here, an encoder is installed in the drive motor of the conveyor to detect movement of the workpiece. The encoder periodically generates a pulse signal according to the rotation of the driving motor and transmits the pulse signal to the control module, and the control module analyzes the pulse signals to calculate the position of the workpiece on the conveyor.

However, in the case of the conventional encoder, since all generated pulse signals are transmitted to the control module, there is a disadvantage in that the resources of the control module are relatively used and delays may occur in the signal processing operation.

Japanese Patent Application Laid-Open No. 10-2009-0022323: Vision inspection device for inspecting both sides of an object

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems and it is an object of the present invention to provide an object defect processing system capable of limiting signal transmission from an encoder to a control unit to a time point when a workpiece is supplied and a time point when it reaches a defective processing unit, And a method for processing the same.

In order to accomplish the above object, according to the present invention, there is provided a defective processing system for a workpiece, comprising: a transferring part provided with a transfer belt circulating in an endless track through a plurality of supporting rollers spaced apart from each other for transferring workpieces; A failure processing unit provided behind the inspection unit on the basis of a moving direction of the workpiece so as to dispose of the workpiece determined to be defective by the inspection unit; An encoder for generating a pulse signal periodically in accordance with the movement of the conveyance belt so as to detect movement of the workpiece; and a controller for controlling the operation of the workpiece discriminated by the inspection unit on the basis of the signal provided by the encoder, Is adjacent to the defective processing unit, the workpiece may be discarded And a control unit for transmitting a discarding operation signal to the untreated processing unit or the operator, wherein the encoder is operable to cause the workpiece to be supplied to the feeding point of the conveyance belt provided in front of the inspection unit, The first pulse signal generated at the time of supply and the second pulse signal generated at the arrival point of the workpiece adjacent to the defective processing unit are provided to the control unit.

Wherein the control unit determines that the workpiece is determined to be defective in the inspection unit after receiving the first pulse signal from the encoder, and when the second pulse signal is received, .

The encoder determines that the workpiece has arrived at the arrival point when the conveyance belt is moved by a set distance corresponding to the separation distance from the feeding point to the arrival point after transmitting the first pulse signal to the controller And transmits the second pulse signal to the control unit.

In the meantime, the defective processing system for a workpiece according to the present invention further includes a sensing unit provided in the conveyance unit for sensing the workpiece supplied to the feeding point of the conveyance belt, and providing a sensing signal to the encoder upon sensing the workpiece And the encoder transmits the first pulse signal to the control unit upon receiving the sensing signal from the sensing unit.

Wherein the workpiece is supplied to the feed point of the conveyance belt sequentially at a predetermined supply time interval by the supply means and the encoder periodically supplies the first pulse signal to the control portion at a time interval corresponding to the supply time .

According to another aspect of the present invention, there is provided a method for processing defects in a workpiece, comprising: a supply step of supplying a workpiece to a supply point of a conveyance belt circulating in an endless track through a plurality of support rollers spaced apart from each other; A first signal transmission step of sending out a first pulse signal generated when the workpiece is supplied to the supply point among pulse signals periodically generated in accordance with the movement of the conveyance belt, An inspection step of discriminating whether or not a defect has occurred in the workpiece through an inspection unit provided on a movement path of the workpiece and transmitting discrimination information on the workpiece to the control unit; At the arrival point provided on the conveyance belt behind the inspection unit among the pulse signals generated by the encoder, A second signal sending step of sending a second pulse signal generated by optical illusion to the control unit; and a control step of controlling the workpiece to be processed when the workpiece is determined to be defective in the inspection step and the control unit receives the second pulse signal, And a processing step of sending a disposal job signal to a failure processing unit or an operator provided behind the arrival point so as to be discarded.

Wherein the encoder transmits the first pulse signal to the control unit when the conveyance belt is moved by a set distance corresponding to a distance from the supply point to the arrival point in the second signal sending step, And transmits the second pulse signal to the control unit when it is determined that the vehicle arrives at the arrival point.

The defective processing system for a workpiece according to the present invention and the method for processing a defective workpiece using the defective processing system according to the present invention restricts the signal transmission from the encoder to the control unit to the point of time when the workpiece is supplied to the conveyor and to the defective processing unit, There is an advantage that the signal processing operation can be performed more quickly.

1 is a view of a defective processing system for a workpiece according to the present invention,
Figs. 2 to 5 are views showing an operating state of the defective-material processing system of Fig. 1,
6 is a flowchart of a method for processing a workpiece defect according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a faulty processing system for a workpiece according to an embodiment of the present invention and a method for processing a faulty workpiece using the same will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

1 to 5 show a workpiece defect processing system 100 according to the present invention.

Referring to the drawings, the workpiece defect handling system 100 includes a transfer unit 110 (see FIG. 1) provided with a transfer belt 112 circulating in an endless track through a plurality of support rollers 111 spaced apart from each other for transferring a workpiece 15, An inspection unit 120 provided on the movement path of the work 15 to determine whether or not a defect has occurred in the work 15 and a detection unit 120 for detecting a defect of the work 15 A defective processing unit 130 installed on the rear side of the inspection unit 120 with reference to the moving direction of the work 15 so that the work 15 can be discarded; An encoder 140 for periodically generating a pulse signal in accordance with the movement of the conveyance belt 112 so as to detect movement of the conveyance belt 112; If the discriminated workpiece 15 is the defective treatment oil And a control unit 150 for transmitting a disposal work signal to the defective processing unit 130 or the worker so that the workpiece 15 can be discarded when the workpiece 15 is adjacent to the work 130.

The conveyance unit 110 includes a frame (not shown), a plurality of support rollers 111 spaced apart from each other in the frame, a conveyance belt 112 installed on the support rollers 111 in an endless track, And a driving unit that provides a driving force to any one of the supporting rollers 111 so that the belt 112 can be circulated.

The support rollers 111 are installed on the frame so as to be spaced apart from each other along the front-rear direction, and both ends thereof are rotatably supported on the frame. The conveyance belt 112 is wound on the support rollers 111, circulated in an endless track, and the workpiece 15 is fed and conveyed to the upper portion. Although not shown in the drawings, the driving unit includes a driving motor provided in the frame, a driving pulley provided on the rotating shaft of the driving motor, a driven pulley provided on the rotating shaft of any one of the supporting rollers 111, 111 of the drive pulley and the driven pulley. On the other hand, the driving unit is not limited thereto, but may be any driving unit that can rotate the supporting roller 111.

On the other hand, when the conveying belt 112 at a position spaced forward from the main body 121 of the inspection unit 120 to be described later is set as the feeding point and the workpiece 15 is fed to the feeding point of the conveyance belt 112 , And the workpiece 15 is conveyed backward by the circulation of the conveyance belt 112.

At this time, the workpiece 15 that has been processed in the previous step is supplied to the feeding point of the conveyance belt 112 by a feeding means such as a robot arm or a conveyance conveyor. Here, the workpieces 15 may be supplied to the feeding point of the conveyance belt 112 sequentially by a feeding means at a predetermined feeding time interval.

The inspection unit 120 includes a main body 121 provided at a position adjacent to the conveyance belt 112 and a camera 120 installed in the main body 121 to photograph the workpiece 15 passing through the upper portion of the conveyance belt 112. [ And a determination module (not shown) for analyzing the image photographed by the camera 123 and determining whether a defect of the workpiece 15 passing through the main body 121 has occurred. The discrimination module transmits the defect discrimination information to the control part 150 for the workpiece 15.

 The defective processing unit 130 includes a container provided in the rear of the inspection unit 120 on the movement path of the workpiece 15 and provided with an insertion space through which the defective workpiece 15 can be inserted, And displays the faulty discard signal to the operator upon receipt of the faulty discard signal from the control unit 150. [ At this time, the conveyance belt 112 at a position spaced forward from the container is set as the arrival point of the workpiece 15, and when the operator confirms the bad discard signal transmitted from the control unit 150 through the display panel, The workpiece 15 arriving at the point is conveyed from the conveyance belt 112 to the container.

On the other hand, although not shown in the drawing, the defective processing unit 130 may further include a robot arm capable of transferring the workpiece 15 transferred to the conveyance belt 112 to the container. When the robotic arm receives the bad discard signal from the control unit 150, the robot arm conveys the workpiece 15 arriving at the arrival point of the conveyor belt 112 from the conveyor belt 112 to the container.

At this time, it is preferable that a processing machine 16 is installed between the inspection unit 120 and the defect processing unit 130 and behind the defect processing unit 130 in order to perform each processing step of the work 15.

Although not shown in the figure, the encoder 140 includes a measuring shaft installed on the rotating shaft of the supporting roller 111 and rotating together with the rotating shaft of the supporting roller 111, A signal generator for generating a pulse signal, and a signal processor for transmitting the pulse signal generated by the signal generator to the controller 150.

The signal generator is installed in the frame and includes a case rotatably supported by the measuring shaft and a circular spacing track fixed to the measuring shaft so as to rotate together with the measuring shaft and having a predetermined radius around the measuring axis A light emitting member provided in a case spaced apart from the measurement axis by a distance corresponding to a radius of the separation trajectory so as to irradiate light to one of the penetration holes; And a light receiving part provided in a case opposite to the light emitting member with respect to the rotary disc to receive light passing through the through hole and generate a pulse signal.

The signal processing unit may be configured to generate the workpiece 15 at the supply point of the conveyance belt 112 provided in front of the inspection unit 120 to identify the workpiece 15 in the pulse signal generated by the signal generator, And provides the control unit 150 with only the first pulse signal and the second pulse signal generated when the work 15 arrives at the arrival point adjacent to the defective processing unit 130. [

Here, the workpiece defect processing system 100 is provided in the transfer unit 110 to detect the workpiece 15 supplied to the supply point of the conveyor belt 112, (Not shown) to the encoder 140. The encoder 140 may further include a sensing unit (not shown). The sensing unit is installed adjacent to a feeding point of the conveyor belt 112 and senses the workpiece 15 when the workpiece 15 is seated on a feeding point. Upon receiving the sensing signal from the sensing unit, the signal processing unit transmits the pulse signal generated by the signal generating unit to the controller 150 as a first pulse signal.

When the workpiece 15 is supplied to the feed point of the conveyance belt 112 at a predetermined supply time interval by the supply means, the signal processing section is not limited to this, The controller 150 may transmit the pulse signal generated by the signal generator to the controller 150 with the first pulse signal. That is, at the beginning of the operation, the worker sets the workpiece 15 at the supply point and inputs the operation signal to the encoder 140 or the control unit 150, and then the signal processing unit is operated at a time interval corresponding to the supply time of the workpiece 15 And may transmit the first pulse signal to the control unit 150. At this time, the signal processing unit may transmit the identification information of the workpiece 15 together with the first pulse signal to the control unit 150.

Then, after the first pulse signal is transmitted to the control unit 150, the signal processing unit controls the movement of the conveyance belt 112 by the predetermined distance corresponding to the separation distance from the supply point to the arrival point, 15) arrives at the arrival point and transmits the second pulse signal to the control unit 150. [ At this time, the operator can input the set distance to the encoder 140 or the controller 150.

The signal processing unit transmits the first pulse signal, and then calculates the movement distance of the conveyance belt 112 based on the signal generated by the signal generation unit. Since the work 15 is moved together with the conveyance belt 112 to be circulated, the movement distance of the conveyance belt 112 can be determined as the movement distance of the work 15. The signal processing unit determines that the workpiece 15 has arrived at the arrival point of the conveyance belt 112 when the calculated movement distance of the conveyance belt 112 reaches the preset input distance, And transmits a signal to the control unit 150. At this time, the signal processor may transmit the identification information or the arrival information of the workpiece 15 together with the second pulse signal to the controller 150.

If the workpiece 15 determined to be defective by the inspection unit 120 is adjacent to the defective processing unit 130 based on a signal provided from the encoder 140, And sends a disposal job signal to the defective processing unit 130 or the worker so as to be discarded. At this time, after receiving the first pulse signal from the encoder 140, the control unit 150 determines that the workpiece 15 is defective in the inspection unit 120, and when the second pulse signal is received , And transmits the disposal job signal to the failure processing unit 130 or the worker. On the other hand, when the inspection unit 120 determines that the workpiece 15 is normal, it transmits a normal signal to the defect processing unit 130 or the operator.

On the other hand, FIG. 6 shows a flowchart of a method for processing a workpiece defect using the defect processing system 100 of the present invention.

Referring to the drawings, the method for processing a faulty workpiece includes a supplying step S101, a first signal transmitting step S102, a signal receiving step S103, a checking step S104, a second signal transmitting step S105, (S106).

The supply step S101 is a step in which the workpiece 15 is supplied to the feeding point of the conveyance belt 112. [ The workpiece 15 is supplied to the conveyance belt 112 in front of the inspection unit 120 as shown in Fig.

The first signal transmitting step (S102) is a step of transmitting the first pulse signal generated when the workpiece 15 is supplied to the supplying point among the pulse signals generated by the encoder 140. [ At this time, the encoder may transmit the first pulse signal and the identification information of the work 15 to the controller 150 together.

The signal receiving step (S103) is a step of receiving the first pulse signal by the controller (150). Here, the control unit 150 may generate a data sheet in which the first pulse signals provided from the encoder 140 are arranged in time order, and may store the generated data sheet.

The inspecting step S104 is a step of discriminating whether a defect of the workpiece 15 has occurred through the inspection unit 120 and transmitting the discrimination information about the workpiece 15 to the control unit. The workpiece conveyed by the conveyance belt 112 arrives at the inspection unit as shown in FIG. 2, and the inspection unit 120 photographs the upper portion of the workpiece 15 to determine whether or not a failure has occurred. At this time, the inspection unit 120 transmits information on the defectiveness of the work 15 to the controller 150. Next, as shown in Fig. 3, the workpiece 15 is transferred from the sensing unit to the processing machine 16, and the workpiece 15 is processed by the processing machine 16. Fig.

The second signal transmission step S105 is a step of transmitting the pulse signal generated by the encoder 140 to an arrival point provided on the conveyance belt 112 behind the inspection unit 120 after the inspection step S104, The controller 15 transmits the second pulse signal generated upon arrival to the controller 150. 4, the workpiece 15 arrives at the arrival point of the conveyance belt 112 in front of the failure processing unit 130, and the encoder 140 moves to the arrival point of the conveyance belt 112 And transmits the second pulse signal to the controller 150 together with the identification information of the workpiece 15. [

At this time, it is preferable that after transmitting the first pulse signal, the encoder 140 transmits the second pulse signal after the workpiece 15 is transferred by the predetermined distance inputted by the workpiece 15. Here, the control unit 150 may generate a data sheet in which the second pulse signals provided from the encoder 140 are arranged in time order, and may store the generated data sheet.

The processing step S106 is a step of processing the workpiece 15 arriving at the arrival point of the conveyance belt 112 according to whether or not a failure has occurred. The control unit 150 determines a processing process of the workpiece 15 based on the data sheet of the first and second pulse signals and the discrimination information provided by the inspection unit 120.

That is, when the inspection unit 120 determines that the workpiece 15 is defective, the control unit 150 transmits a disposal job signal to the defective processing unit 130 or the worker after receiving the second pulse signal , The work 15 is carried to the failure processing unit 130. [ On the other hand, if the workpiece 15 is determined to be normal in the inspection unit 120, the control unit 150 transmits a normal signal to the defective processing unit 130 or the worker after receiving the second pulse signal. The workpiece 15 is transferred to the processing machine 16 provided at the back of the defective processing unit 130 and processed by the processing machine 16 as shown in Fig.

The system 100 for processing a faulty object according to the present invention and the method for processing a faulty material using the same according to the present invention are configured to transmit a signal from the encoder 140 to the controller 150 at a time point when the object 15 is supplied to the conveyor, The control unit 150 requires a relatively small amount of resources, thereby achieving a faster signal processing operation.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features presented herein.

100: Workpiece defect processing system
110:
111: Support roller
112: conveying belt
120: Inspection unit
121: Body
122: camera
130: Bad processing unit
140: Encoder
150:

Claims (7)

A conveyance unit provided with a conveyance belt circulating in an endless track through a plurality of support rollers spaced apart from each other for conveying the workpieces;
An inspection unit installed on a moving path of the workpiece to determine whether a defect has occurred in the workpiece;
A failure processing unit provided behind the inspection unit based on a moving direction of the workpiece so as to dispose of the workpiece determined to be defective by the inspection unit;
An encoder which is provided in the conveyance unit and generates a pulse signal periodically in accordance with movement of the conveyance belt so as to sense movement of the workpiece; And
And a control unit for transmitting a disposal signal to the defective processing unit or the worker so that the workpiece determined to be defective by the inspection unit based on the signal provided by the encoder is adjacent to the defective processing unit, Respectively,
The encoder
A measurement axis rotating together with the rotation axis of the support roller;
A signal generator for generating a pulse signal according to the rotation of the measurement axis; And
Wherein the pulse signal generated by the signal generation unit is transmitted to a control unit so that the workpiece is supplied to a feeding point of the conveyance belt provided in front of the inspection unit in order to identify the workpiece among the pulse signals generated by the signal generation unit And a signal processing unit for providing only the first pulse signal generated at the time of supply and the second pulse signal generated at the arrival point of the workpiece adjacent to the defective processing unit to the control unit,
Wherein the control unit determines that the workpiece is judged to be defective in the inspection unit after the first pulse signal is received in the signal processing unit and if the second pulse signal is received, Signal transmission,
Workpiece defective processing system.
The method according to claim 1,
Wherein the control unit determines that the workpiece is determined to be defective in the inspection unit after receiving the first pulse signal from the encoder, and transmits the discarding operation signal to the defective processing unit or the worker when the second pulse signal is received Transmitting,
Workpiece defective processing system.
3. The method according to claim 1 or 2,
The encoder determines that the workpiece has arrived at the arrival point when the conveyance belt is moved by a set distance corresponding to the separation distance from the supply point to the arrival point after transmitting the first pulse signal to the control section And transmits the second pulse signal to the control unit.
Workpiece defective processing system.
The method of claim 3,
And a sensing unit provided in the conveyance unit to sense the workpiece supplied to the feed point of the conveyance belt and providing a sensing signal to the encoder upon sensing the workpiece,
Wherein the encoder transmits the first pulse signal to the control unit upon receiving the sensing signal from the sensing unit,
Workpiece defective processing system.
The method of claim 3,
A plurality of the workpieces are sequentially supplied to the feeding point of the conveyance belt at predetermined feeding time intervals by the feeding means,
Wherein the encoder periodically transmits the first pulse signal to the control unit at a time interval corresponding to the supply time,
Workpiece defective processing system.
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