KR20220056094A - Pipe bolt inspection device with position alignment - Google Patents

Abstract

The present invention relates to an inspection device for pipe bolts capable of position alignment, and more particularly to the inspection device for pipe bolts capable of position alignment, ensuring that the inspection of pipe bolts proceeds smoothly by aligning the positions and then supplying the pipe bolts during inspection while continuously supplying processed pipe bolts. With a plurality of optical cameras, as well as a threaded part of the pipe bolt, through sequentially photographed images of all processed parts of front and rear parts, accurate and efficient inspection can be performed by determining whether a product is normal or defective. The inspection device for pipe bolts capable of position alignment includes a pipe bolt supply part, a rotation mounting part, a plurality of optical cameras, an image judgment part, and a sorting and discharging part.

Description

Pipe bolt inspection device with position alignment

The present invention relates to an inspection device for pipe bolts capable of position alignment, and more particularly, to clearly align the inspection positions of pipe bolts when inspecting whether pipe bolts used to fasten automobile parts and the like are precisely machined as designed. It is a technology that can reduce work time and improve accuracy and reliability.

In general, a bolt is a fastening means widely used to couple objects, and the shape varies depending on the shape of the object to be coupled, the load, and the coupling position. The flange 11 protruding to the , a threaded portion 12 in which a thread is formed in front of the flange 11 , a section formed to be stepped so that the outer diameter is reduced from the screw portion 12 toward the front, and a section tapered toward the end from this The rear end of the formed front end 13 and the flange 11 is formed with a stepped rear end 14 so as to have a small outer diameter, and is often used to combine vehicle parts.

First, looking at the prior art,

Registration No. 10-1083293 (Special) In order to supply screws by providing vibration to the input part supported by the body and inserting the screw, the screw supply part that supplies the screw away from the input part to the bowl feeder, and the screw supply part and a hopper including a vibrator; A bowl body in which the screws supplied from the screw supply unit of the hopper are accommodated and vibration is provided for screw transfer, and the bowl body is arranged so as to gradually rise from the bottom surface of the bowl body in a spiral structure so that the screws inserted into the bowl body are transferred upward. a bowl feeder including a first track part and a second track part provided on the upper side of the bowl body to remove some of the screws supplied through the first track part and align the rest; a linear feeder connected to the second track part of the bowl feeder and sequentially feeding the screws aligned in the bowl feeder in a line; A screw feed device formed in a rotary disk structure to receive a screw from the linear feeder and transport it to a discharge position, a photographing device for photographing the screw transferred to the discharge position by the screw feed device, and an image from the photographing device A screw sorter comprising: an image analysis device that analyzes signals to determine whether a photographed screw is defective; And, the second track portion of the bowl feeder, along the movement path of the screw, by adjusting the width of the bottom plate of the track on which the screw is moved, a first dropout portion for first dropping off some of the moving screws, and the first dropout portion A second dropout portion provided on the rear path to delete a certain section of the height of the side plate of the track and to make the width of the bottom plate narrower than the width of the bottom plate immediately in front to secondarily drop off some of the moving screws; Between the third dropout part that is disposed at the rear of the dropout part to make the width of the bottom plate narrower than the width of the bottom plate immediately in front of the third dropout part for the third drop off of some of the moving screws, and the bottom plate and the side plate of the track where the third dropout part is configured A slit path formed in the slit to be moved in a state in which the screws are inserted, and a fourth dropout that is provided in the middle of the slit path and ends the part constituting the bottom plate of the track to drop off the screw not inserted into the slit It is a technology related to a screw sorting equipment equipped with a fifth missing part disposed behind the part and the fourth missing part to drop a screw unstablely inserted into the slit by spraying air on the slit path.

Registration No. 10-0899361 (Special) After taking pictures with an optical camera while transferring the screws continuously supplied from the feeder, comparing the images taken with the optical camera with the images stored in advance to determine whether the screws are in good or bad condition In the screw inspection and sorting device configured to be accommodated in different storage bins, it is connected to the feeder and is formed in a cylindrical shape for moving the screw supplied from the feeder, and fixing grooves for fixing the screw at the end are formed at equal intervals, and the horizontal axis An index comprising: a plate formed in a ring shape to rotate around a plate and having fixing grooves on one side at equal intervals; The screw fixed to the fixing groove of the index is photographed with an optical camera, the image photographed with the optical camera is compared with the image stored in the controller unit, normal/failure is read, and the bad screw read by the controller unit is removed. It is a technology related to a screw inspection and sorting device configured to separate a defective screw separating device from a fixing groove and store it in a defective container, and a normal screw to be accommodated in a normal container.

Registration No. 20-0424801 (Special) Forming an interlocking gear rotating in mesh with the driving gear of the driving motor on the upper side of the body, the interlocking gear operates a rotating plate integrally fixed with the shaft formed in the gearbox, The outer periphery of the surface of the rotating plate forms a plurality of fixing grooves that can accommodate the screw, which is an object to be inspected, and left and right and up and down feeders capable of moving the screws from the feeder are formed on one side of the body, and a fixing groove is formed on the side of the feeder. Configures a camera that can enlarge the side of the screw fixed to, and the screw on which the side inspection is made is moved to the position of the camera that inspects the plane of the screw while rotating by a rotating plate, and the screw selected through the control unit is a technology related to a precision screw inspection and sorting device configured to be transported by a sorting feeder and gripper cylinder.

Registration No. 10-1613443 (Special) In the omnidirectional simultaneous inspection of bolt threads of an automatic defective bolt sorting device, an upper plate fixed to the upper end of a plurality of vertically erected upper plate fixing columns, and a driving device mounted on the lower part of the upper plate and a circular index mounted on the lower part of the driving device and rotated by the driving device, a plurality of bolt seating grooves formed on the outer peripheral surface, and an inner peripheral surface opposite to the outer peripheral surface of the circular index to be rotated. A guide plate with a good product outlet and a bad outlet formed on the inner circumferential surface of the guide plate and a bad outlet communicating with the bolt seat groove, and a guide plate mounted on the lower end of the guide plate and standing vertically to support the guide plate. a circular indexing device including a guide plate fixing column to secure a space at the bottom; When the screw part of the bolt seated in the bolt seating groove and arranged in the vertical direction reaches a position determined by the driving device, the guide plate is divided into three based on the axial center of the bolt so as to photograph the entire direction of the screw part of the bolt; and a camera disposed at each point below the circular index; and a lighting device provided under the guide plate and the circular index to irradiate light toward the screw portion of the bolt. It is a technology related to the omnidirectional simultaneous inspection of the bolt thread part of the automatic defective bolt sorting device, including a.

The above-mentioned prior art mainly describes checking whether a screw or other workpiece is processed accurately in a desired manner.

However, as described above, in the final inspection of a workpiece such as a pipe bolt, a separate technical configuration for accurately aligning the pipe bolt to a position to be inspected is not included, so a continuously moving pipe bolt is not included. When positioned for external imaging, as accurate positioning is not possible and accurate inspection is not performed, reliability is inevitably reduced, and further, there is a problem in that it takes a lot of work time to decrease productivity.

The present invention has been devised to solve the problems of the prior art, and enables accurate inspection and sorting of whether a pipe bolt having a more complex shape compared to a general screw has been processed as designed, as well as being put into an inspection part. On the other hand, in the process of inspecting the pipe bolts, in the process of inspecting the pipe bolts, the inspection is made quickly through the most optimized positioning, so that it is possible to determine whether it is normal or defective, thereby increasing productivity by reducing working time. It was completed as a technical task with an emphasis on providing an inspection device for pipe bolts that can be positioned and aligned so that reliability can be improved accordingly.

Accordingly, the present invention provides a pipe bolt supply unit 100 that aligns and continuously supplies the processed pipe bolts; Each of the pipe bolts delivered from the pipe bolt supply unit 100 is mounted on a mounting groove 200a having one side open and concave inwardly formed in plural at equal intervals along the outer diameter and intermittently rotating the rotation holder 200 ); a plurality of optical cameras 300 installed in front of the rotation path of the rotation holder 200 to photograph the pipe bolts when the rotation holder 200 is stopped; an image determination unit 400 that compares the photographed image of the pipe bolt with an image of a normal pipe bolt product to determine whether the photographed pipe bolt is a normal product processed as designed; and a sorting discharge unit 500 for separating and discharging the pipe bolts determined to be normal products and discharging them away from the rotation mounting unit 200 In this case, the pipe bolt supply unit 100 rotates in place with the hopper 110 for supplying the pipe bolts, and separately supplies the pipe bolts supplied from the hopper 110 to the guide rail 130 at intervals. A rotating drum 120 to make it possible, a guide rail 130 connected to the outer end of the rotating drum 120 to transport the pipe bolts supplied from the rotating drum 120, and the guide rail 130 It has a technical feature consisting of a standing guide unit 140 that is configured at the end, aligns the pipe bolts to be transported in the vertical direction, and moves to the rotation mounting unit 200 by vibration.

The rotating drum 120 includes a detection sensor configured on the outer upper portion and sensing a pipe bolt moving the inner bottom edge of the rotating drum 120, and when the pipe bolt reaches a set distance, it is installed in the cylinder. A pair of first and second delay members 123 and 125 operating vertically by It is characterized in that it is configured to be transported at intervals.

The standing guide unit 140 includes a main body 141 in which a central portion is cut in the longitudinal direction to form a hole through which the pipe bolt can be erected and moved, and is configured on the upper portion of the main body 141 , the guide rail 130 . ) a variable cylinder 143 that changes so that the rear end of the pipe bolt is positioned in an upward direction depending on whether the direction of the pipe bolt transferred from the front end or the rear end, and the variable cylinder is configured on the side of the main body 141 A fixed cylinder 145 that is spaced apart from the rear of the 143 and supports the lower portion of the pipe bolt so that it can stand vertically when the position of the pipe bolt is changed by the variable cylinder 143; It is located at the rear of the fixed cylinder 145 and is characterized in that it includes a detection sensor 147 that detects whether the direction of the pipe bolt is a front end or a rear end.

In the standing guide unit 140, It is configured on the other side of the main body 141 in which the fixed cylinder 145 is configured, and the return part 149 for retransferring the pipe bolts that are not erected by the variable cylinder 143 to the rotating drum 120 is configured. technical features.

The plurality of optical cameras 300 are installed to be spaced apart at equal intervals along the diagonal direction with the center of the mounting groove 200a in front of one side of the rotation path of the rotation mounting unit 200 to photograph the threaded image of the pipe bolt. a pair of first and second cameras 310 and 320; and a third camera 330 arranged on a straight line in the mounting groove 200a in front of the other side of the rotation path of the rotation holder 2000 to photograph the entire image of the pipe bolt including the front end and the rear end. technical features.

The pipe bolts photographed by the first and second cameras 310 and 320 are installed as a pair on the opposite front and rear straight lines of the mounting groove 200a on which the pipe bolts are mounted, and the pipe bolts photographed by linear movement are fixed. It is characterized in that it further comprises a fixed cylinder (610, 620).

According to the apparatus for inspecting pipe bolts capable of position alignment of the present invention, it is possible to induce accurate inspection through position alignment while continuously supplying processed pipe bolts, while using a plurality of optical cameras, not only the threaded part of the pipe bolt, but also the shear Accurate and efficient inspection can be made by determining whether a product is normal or defective through images taken sequentially of all processed parts of the part and rear end.

1 is a plan view showing a preferred embodiment of the present invention;
2 is a side view showing a preferred embodiment of the present invention;
3 is a plan view showing a preferred embodiment of the pipe bolt supply unit of the present invention;
Figure 4b is a plan view showing a preferred embodiment of the pipe bolt supply part of the present invention
5 is a side view showing a preferred embodiment of the pipe bolt supply unit of the present invention;
6 is an operation state diagram showing a preferred embodiment of the first and second delay members of the present invention;
7 is a view showing a preferred embodiment of the standing guide of the present invention
8 is an operation state diagram showing a preferred embodiment of the standing guide of the present invention;
9 is a plan view showing a preferred embodiment of the rotation holder of the present invention;
10 is a view showing the movement direction and return direction of the pipe bolt of the present invention;
11 is a view showing a pipe bolt photographed by the first and second cameras of the present invention;
12 is a view illustrating images of normal products and defective products of pipe bolts photographed by the first and second cameras of the present invention;
13 is a view showing a pipe bolt photographed by the third camera of the present invention;
14 is a view illustrating normal product and defective product images of pipe bolts photographed by the third camera of the present invention;
15 is a perspective view of a pipe bolt being inspected according to the present invention;

The present invention can reduce work time and improve accuracy and reliability by making it possible to clearly align the inspection positions of the pipe bolts when inspecting whether the pipe bolts used to fasten automobile parts, etc. are precisely machined as designed. Provided is an inspection device for pipe bolts that can be positioned and aligned.

Hereinafter, the preferred configuration and operation of the present invention for achieving the above object will be described with reference to FIGS. 1 to 15 with reference to the accompanying drawings.

Referring to FIG. 1 or FIG. 2 for the configuration of the pipe bolt inspection apparatus of the present invention, the pipe bolt supply unit 100 that aligns and continuously supplies the processed pipe bolts, and each pipe delivered from the pipe bolt supply unit 100 The rotation holder 200 intermittently rotates by mounting the bolt, a plurality of optical cameras 310, 320, 330 for photographing the pipe bolt being rotated, and the photographed pipe bolt image to determine whether the product is a normal product or a defective product processed as designed It consists of an image determination unit 400 that does this, and a selection discharge unit 500 that selects and discharges normal or defective products.

At this time, the pipe bolt supply unit 100 rotates in place with the hopper 110 for supplying the pipe bolts, as shown in FIGS. 3 to 5 , and space the pipe bolts supplied from the hopper 110 . A rotating drum 120 to be individually supplied to the guide rail 130 side, and a guide rail 130 connected to the outer end of the rotating drum 120 to transport the pipe bolts supplied from the rotating drum 120 . ) and a standing guide unit 140 configured at the end of the guide rail 130 to vertically align the pipe bolts to be transported and move it to the rotation mounting unit 200 by vibration.

The hopper 110 is a configuration into which the processed pipe bolts are put, and is a configuration to supply the pipe bolts processed by a mold or other processing devices to the rotating drum 120, so a separate detailed description will be omitted. do it with

The rotating drum 120 is configured to rotate by receiving the pipe bolts from the hopper 110 . At this time, the rotation may be rotated by configuring a normal motor.

In addition, as shown in FIG. 6 , the rotary drum 120 includes a detection sensor configured to detect a pipe bolt that is configured on the outer side and moves the inner bottom edge of the rotary drum 120 , the pipe When the bolt reaches a set distance, a pair of first and second delay members 123 and 125 that operate vertically by a cylinder are configured, and the first and second delay members 123 and 125 operate individually. And, it is configured to be transferred to the guide rail 130 at a predetermined interval.

That is, when a plurality of pipe bolts are supplied from the hopper 110 to the inside of the rotating drum 120 in the first and second delay members 123 and 125 configured in the rotating drum 120 , each pipe bolt is They are stacked on top of each other or are in complete contact with each other, but this is a configuration for supplying these pipe bolts at a predetermined interval, and the detection sensors of the first and second delay members 123 and 125 detect a normal object. It may be composed of a sensor that does, in the case of the cylinder, hydraulic or pneumatic pressure may be applied.

For this purpose, the pipe bolts supplied from the hopper 110 can be continuously supplied in a state spaced apart from each other at regular intervals for stable and accurate inspection in the inspection process, which is a post-process, and in the standing guide unit 140 . When the pipe bolt is erected, it is intended to perform the work without malfunction.

In addition, although not shown in the present invention, the first and second delay members 123 and 125 are spaced apart from the first and second delay members 123 and 125 on the outer upper portion of the rotating drum 120 to the cylinder like the first and second delay members 123 and 125 . At least one that can cause continuous friction with the pipe bolt that is moved by the rotation of the rotating drum, rather than a configuration operated by the rotating drum, and can induce the pipe bolt to be positioned at the edge of the bottom of the rotating drum 120 . A guide member can be configured.

In this case, by guiding the proximity to the first and second delay members 123 and 125 through the configuration of the guide member, a smooth operation can be performed.

As shown in FIG. 4 or 9, the guide rail 130 is connected to the outside of the rotary drum 130, so that the pipe bolt moving by the rotation of the rotary drum 120 can be smoothly introduced. The opening hole 131 is formed, and the guide rail 130 is configured to be rotary by a motor so that the pipe bolt introduced into the opening hole 131 can be moved toward the standing guide unit 140 .

On the other hand, in the guide rail 130, protrusion bars protruding upward at regular intervals are formed on both sides of the rail on which the pipe bolt is seated and moved, so that it is possible to prevent separation from the section in which the pipe bolt is transported.

As shown in FIG. 5 , the standing guide unit 140 is disposed close to the end of the guide rail 130 so that the threaded part of the pipe bolt is erected toward the floor and is configured to be supplied to the rotation holder 200 , , At this time, the standing guide unit 140 is formed to be spaced apart from a pair of plates inclined toward the rotation mounting unit 200 at a predetermined interval, and the flanges of the pipe bolts are caught between the pair of plates so as to be continuously aligned. It is supplied to the rotation holder 200 .

On the other hand, the standing guide unit 140, as shown in Figs. 7 to 9, the main body 141, the variable cylinder 143, the fixed cylinder 145, the detection sensor 147 and the return unit 149. is comprised of

The central portion of the body 141 is cut in the longitudinal direction to form a hole 141a through which the pipe bolt can be erected and moved. ) side direction, and the main body 141 is disposed to be inclined in the direction of the rotation holder 200 as described above, and, by having vibration, naturally moves toward the rotation holder 200 side. It is guided, and has a configuration similar to that of a conventional vibrating feeder.

On the other hand, the variable cylinder 143 is configured on the upper portion of the main body 141 as shown in FIG. 7 or 8 , and the direction of the pipe bolt transferred from the guide rail 130 is the front end or the rear end. It is configured to vary so that the rear end of the pipe bolt is positioned in the upper direction according to the

In other words, the variable cylinder 143 allows the pipe bolt to be transported to be moved in the direction toward the rotation holder 200 with the lower part fitted in the hole 141a of the body 141 . For this purpose, the pipe bolt is stably caught in the mounting groove 200a for accommodating the pipe bolt formed in the rotation holder 200.

Here, the fixed cylinder 145 is configured on the side surface of the main body 141 in FIG. 7 or 8 and is spaced apart from the rear of the variable cylinder 143, and the position of the pipe bolt by the variable cylinder 143 It is configured to support the lower part of the pipe bolt to stand up vertically when is changed. When the front end of the pipe bolt is struck by the variable cylinder 143, the pipe bolt stands up by the applied force By fixing the direction in which the front end of the pipe bolt moves so as to prevent work defects such as bouncing off without fail, the front end of the pipe bolt is fixed by the fixing cylinder 145 and smoothly moves in a finally standing state. can become

The detection sensor 147 is located at the rear of the fixed cylinder 145 to detect whether the direction of the pipe bolt is the front end or the rear end. Preferably, a pair of detection sensors 147 are spaced apart from each other. ) are each configured, the detection sensor 147 disposed close to the variable cylinder 143 detects whether the direction of the pipe bolt transferred from the guide rail 130 is the front end or the rear end, and the variable cylinder 143 ) and the detection sensor 147 disposed not in proximity to detect whether the pipe bolt has stood up or not, and if not, the bolt can be moved to the return unit 149 .

The return part 149 is configured on the other side of the main body 141 in which the fixed cylinder 145 is configured to re-transfer the pipe bolts that are not erected by the variable cylinder 143 to the rotating drum 120, The return unit 149 is re-supplied to the rotating drum 120 again by a rotary rail when the non-standing pipe bolt is moved, thereby inducing smoothness of inspection in the rotating cradle 200 in the future. .

The rotation holder 200 is a ring-shaped plate material in which a mounting groove 200a for accommodating the pipe bolt supplied to the standing guide 140 is formed and rotates. As shown in FIG. 10 , one side of the mounting groove 200a is opened to accommodate the supplied pipe bolt, and a plurality of recesses are formed at equal intervals along the outer diameter to be concave inward. The rotation mounting unit 200 intermittently rotates in units of the separation distance of the mounting groove 200a along a clockwise or counterclockwise direction by mounting a plurality of pipe bolts on the outside.

The optical camera (310, 320, 330) is installed in a number in front of the rotation path of the rotation holder 200 to take an image of the pipe bolt when the intermittently rotating rotation holder 200 is stopped, installed in front of one side of the rotation path It consists of first and second cameras 310 and 320 for photographing the threaded part of the pipe bolt that has been erected, and a third camera 330 installed in front of the other side of the rotation path to photograph the entire image of the pipe bolt.

As shown in FIG. 11 , the first and second cameras 310 and 320 are installed to be spaced apart from each other at equal intervals along the forward oblique direction around the mounting groove 200a when the rotation mounting unit 200 is stopped. (12) can be photographed with a wider angle of view. The first and second cameras 310 and 320 are preferably spaced apart from each other at an angle of 45° to the left and right around the mounting groove 200a in consideration of the rotation mounting unit 200 behind the pipe bolt.

As shown in FIG. 12, as the first and second cameras 310 and 320 photograph the circumference of the pipe bolt thread portion to be spaced apart from the left and right at equal intervals around the mounting groove 200a, the difference in the number of threads occurs. Since the start and end points can be accurately captured, errors in the number of threads depending on the shooting location can be prevented, and the number of densely formed threads or lead angles of threads can be captured more accurately.

In addition, the fixing cylinders 610 and 620 are provided in pairs on the opposite front and rear straight lines of the mounting groove 200a to fix the standing state without the pipe bolts flowing when the first and second cameras 310 and 320 are photographed. . The fixed cylinders 610 and 620 are formed so that a soft elastic material such as silicone or rubber is concavely supported in a semicircular shape at the ends of the rods reciprocating in a straight direction. At this time, the fixing cylinder 610 in front of the mounting groove 200a is located on the center line dividing between the first and second cameras 310 and 320 at equal angles, and the fixing cylinder 620 at the rear is an internal fixing plate 700 to be described later. is provided in

These fixed cylinders 610 and 620 move forward toward the pipe bolt when the first and second cameras 310 and 320 are photographed, and as the soft elastic material at the end supports the upper part of the pipe bolt from both sides, it is fixed in a safe standing state without flow even from external impact. can do.

As shown in FIG. 13 , the third camera 330 is spaced apart from the first and second cameras 310 and 320 and is installed to be aligned in a straight line in the holder groove 200a when the rotation holder 200 is stopped. The entire length of the pipe bolt is photographed to check whether the front end 13 and the rear end 14 of the bolt are processed as designed. As shown in FIG. 14 , an example in which the rear end 14 of the pipe bolt is not properly processed is shown as a defective product.

On the other hand, as shown in FIGS. 11 and 13 , the flat lighting fixture 700 is mounted to the rear of the pipe bolt so as to face the cameras 310, 320 and 330 in a straight line to obtain a clearer image when the first to third cameras 310, 320, and 330 are photographed. is installed A plurality of flat lighting fixtures 700 are installed at positions corresponding to the first to third cameras 310 , 320 , and 330 on the inner fixing plate 700 installed inside the ring-shaped rotation mount 200 .

Such a flat lighting device 700 is a lighting device in which a light source is installed therein and light is irradiated through the front light-emitting surface, and the front light-emitting surface is formed in a plane that can accommodate the entire bolt in proximity to the pipe bolt. Therefore, when the first to third cameras (310, 320, 330) are photographed, not only the light illuminance around the pipe bolt is formed, but also the front light emitting surface disposed behind the pipe bolt acts as a background to produce a pipe bolt image with a clearer and clearer boundary. can be obtained

The image determination unit 400 extracts the pipe bolt boundary line according to the pixel brightness difference between the pipe bolt and the surroundings from the image of the pipe bolt photographed by the first to third cameras 310 , 320 , and 330 . In this case, as described above, the boundary line may be more accurately extracted due to the image acquired with the front emission surface as the background. When the boundary line image is extracted in this way, it is compared with the boundary line image of the stored normal product to determine whether there is a difference, thereby discriminating between a normal product and a defective product.

The sorting discharge unit 500 is provided to select and discharge the pipe bolts photographed by the camera into normal products and defective products. It faces the cylinder 510 and the removal cylinder 510 and has a discharge chute 520 installed in front of the mounting groove 200a. The removal cylinder 510 is inserted into the discharge chute 520 in front of the rod reciprocating in a straight line by dropping the pipe bolt from the mounting groove 200a. At this time, the removal cylinder 510 and the discharge chute 520 are installed as a pair in a plurality of positions. In FIG. 4, the removal cylinder ( 510 and discharge chute 520 are shown in three pairs.

In the pipe bolt inspection apparatus of the present invention made as described above, when the pipe bolt is supplied to the hopper 110 , it is continuously supplied to the rotation mounting unit 200 through the drum 120 and the standing guide 140 . At this time, the supplied pipe bolt is intermittently rotated by the rotation holder 200 while the flange 11 is caught in the holder groove 200a of the rotation holder 200 and the screw part 12 stands up toward the bottom. .

When the pipe bolt rotates and reaches the inspection position of the threaded part 12, the first and second cameras 310 and 320 in a state where the standing state is fixed by a pair of fixed cylinders 610 and 620 installed in front and rear of the pipe bolt. The screw part 12 is photographed. And, when the rotation mounting unit 200 rotates and the pipe bolt on which the screw unit 12 is photographed moves to the inspection position at both ends, the third camera 330 turns on the entire pipe including the front end 13 and the rear end 14 . An image of the bolt is taken.

The image of the pipe bolt photographed in this way is compared with the normal product boundary line image stored after the boundary line is extracted by the image determination unit 400 to determine a normal product and a defective product. At this time, as the cameras 310 , 320 , and 330 photograph the flat lighting device 700 behind the pipe bolt as a background, an image of the pipe bolt having a clearer and clearer boundary is obtained. When the pipe bolts for which the photographed images are compared and determined are moved to the normal product sorting position and the defective product sorting position by the rotation of the rotating mounting unit 200, they are removed from the rotating mounting unit 200 by the removal cylinder 510, respectively. of the discharge chute 520 is selected.

As described above, the present invention determines whether a product is normal or defective by sequentially photographing all the processed parts of the pipe bolt as well as the screw part of the pipe bolt with a plurality of optical cameras while continuously supplying the processed pipe bolt. Accordingly, accurate and efficient inspection can be made.

100: pipe bolt supply 110: hopper
120: rotating drum
123: first delay member 125: second delay member
130: guide rail 131: open hole
140: standing guide
141: body 141a: hole
143: variable cylinder 145: fixed cylinder
147: detection sensor 149: return unit
200: rotation holder 200a: mounting groove
310: first camera 320: second camera
330: third camera 400: image determination unit
500: sorting discharge unit 510: removal cylinder
520: discharge chute 610: front fixed cylinder
620: rear fixed cylinder 700: flat lighting fixture

Claims (6)

a pipe bolt supply unit 100 for arranging and continuously supplying the processed pipe bolts; Each of the pipe bolts delivered from the pipe bolt supply unit 100 is mounted on a mounting groove 200a having one side open and concave inwardly formed in a plurality at equal intervals along the outer diameter to intermittently rotate the rotation holder 200 ); a plurality of optical cameras 300 installed in front of the rotation path of the rotation holder 200 to photograph the pipe bolts when the rotation holder 200 is stopped; an image determination unit 400 that compares the photographed image of the pipe bolt with an image of a normal pipe bolt product to determine whether the photographed pipe bolt is a normal product processed as designed; and a sorting discharge unit 500 for separating and discharging the pipe bolts determined to be normal products and discharging them away from the rotation mounting unit 200 in,
The pipe bolt supply unit 100 rotates in place with the hopper 110 for supplying the pipe bolts, so that the pipe bolts supplied from the hopper 110 are individually supplied to the guide rail 130 at an interval. A rotating drum 120, a guide rail 130 connected to the outer end of the rotating drum 120 to transport the pipe bolts supplied from the rotating drum 120, and an end of the guide rail 130 A pipe bolt inspection device capable of position alignment, characterized in that it comprises a standing guide unit 140 that vertically aligns the transferred pipe bolts and moves them to the rotation mounting unit 200 by vibration.
The method of claim 1,
In the rotary drum 120,
It is configured on the outer upper part, and includes a detection sensor for detecting the pipe bolt moving the inner bottom edge of the rotating drum 120, and a pair of vertically operated by the cylinder when the pipe bolt reaches a set distance. The first and second delay members 123 and 125 are configured,
The first and second delay members (123, 125) are each operated individually, and the pipe bolt inspection apparatus capable of position alignment, characterized in that it is configured to be transferred at a predetermined interval to the guide rail (130).
The method of claim 1,
The standing guide 140 is,
A main body 141 in which a hole is formed in which the central part is cut in the longitudinal direction to allow the pipe bolt to stand up and move;
A variable cylinder 143 configured on the upper portion of the main body 141 to change the rear end of the pipe bolt to be positioned upward depending on whether the direction of the pipe bolt transferred from the guide rail 130 is the front end or the rear end. Wow,
It is configured on the side of the main body 141 and is spaced apart from the rear of the variable cylinder 143 so that when the position of the pipe bolt is changed by the variable cylinder 143, it supports the lower part of the pipe bolt and vertically A fixed cylinder 145 to be able to stand up, and
Positional alignment possible pipe bolt inspection apparatus, characterized in that it is located at the rear of the fixed cylinder (145) and comprises a detection sensor (147) for detecting whether the direction of the pipe bolt is the front end or the rear end.
4. The method of claim 3,
In the standing guide unit 140,
It is configured on the other side of the main body 141 in which the fixed cylinder 145 is configured, and the return part 149 for retransferring the pipe bolts that are not erected by the variable cylinder 143 to the rotating drum 120 is configured. Inspection device for pipe bolts that can be positioned and aligned.
The method of claim 1,
The plurality of optical cameras 300,
A pair of first and second cameras ( 310, 320); and,
and a third camera 330 arranged on a straight line in the mounting groove 200a in front of the other side of the rotation path of the rotation cradle 2000 and photographing the entire image of the pipe bolt including the front end and the rear end. Inspection device for pipe bolts that can be positioned and aligned.
3. The method of claim 2,
The pipe bolts photographed by the first and second cameras 310 and 320 are installed in pairs on the opposite front and rear straight lines of the mounting groove 200a on which the pipe bolts photographed by the first and second cameras 310 and 320 are mounted, and the pipe bolts photographed by linear movement are fixed. Fixing cylinders (610, 620) to the; position alignment possible pipe bolt inspection device, characterized in that it further comprises.

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