TWI667467B - Workpiece appearance inspection device and workpiece appearance inspection method - Google Patents

Abstract

The object of the present invention is to improve the inspection efficiency without damaging the spherical workpiece. The solution of the present invention is a workpiece appearance inspection device (10), which includes a conveying table (15), a workpiece supply section (11A), an annular stopper (16), a workpiece amount measurement section (17), and a workpiece inspection section. (18). The control unit (30) stops the supply of the workpiece when the amount of the spherical workpiece (W) reaches a certain value based on the information from the workpiece quantity measurement unit (17) while rotating the conveying table (15), and inspects the workpiece The section (18) inspects the appearance of the spherical workpiece (W) on the transfer table (15).

Description

Workpiece appearance inspection device and workpiece appearance inspection method

The invention relates to a workpiece appearance inspection device and a workpiece appearance inspection method for inspecting the appearance of a spherical workpiece.

Conventionally, a workpiece appearance inspection device for inspecting the appearance of a small spherical workpiece such as an industrial part or an electronic part is known.

The workpiece appearance inspection device includes a transfer table having a large number of round holes on the periphery, a workpiece supply section that supplies spherical workpieces to the round holes of the transfer table, and a workpiece inspection section that checks the appearance of the spherical workpieces in the round holes.

However, in such a workpiece appearance inspection device, when a spherical workpiece is inserted into a circular hole of a transfer table, the spherical workpiece may abut against the periphery of the circular hole and be damaged.

In addition, the shape of the round hole of the transfer table is set in accordance with the shape of the spherical workpiece, so the entire transfer table must be exchanged each time the shape of the spherical workpiece is changed.

Furthermore, if the shape of the spherical workpiece becomes smaller, it becomes difficult to cooperate with it to form a round hole of the transfer table.

In addition, since the spherical workpieces are arranged in the separated circular holes of the transfer table, the spherical workpieces are also separated from each other. Therefore, the number of spherical workpieces placed on the transfer table is limited, and inspection efficiency is reduced. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Application Laid-Open No. 2011-156514

[Problems to be Solved by the Invention]

The present invention was conceived by the inventor in view of this point, and an object thereof is to provide a workpiece appearance inspection device and a workpiece appearance inspection method that can not damage a spherical workpiece and can improve inspection efficiency. [Means to solve the problem]

The invention is a workpiece appearance inspection device, which is a workpiece appearance inspection device for inspecting the appearance of a spherical workpiece. The workpiece appearance inspection device is provided with a conveying table formed of a circular transparent body that can be freely rotated in a horizontal direction; The stopper is provided on the outer periphery of the conveying table and holds the spherical workpiece; the workpiece supplying section supplies the spherical workpiece to the conveying table; the conveying table driving mechanism drives the conveying table in the rotation direction; The workpiece amount measuring section measures the amount of the spherical workpiece on the transfer table; the workpiece inspection section is arranged on the outermost periphery of the transfer table, and checks the appearance of the spherical workpiece from above and below; and the control section; The control unit is based on the information from the workpiece quantity measuring unit. When the amount of the spherical workpiece reaches a certain value, the control unit stops the supply of the spherical workpiece from the workpiece supply unit and operates the conveying table driving mechanism. The conveyance table is rotated, and the appearance of the spherical workpiece is inspected by the workpiece inspection unit.

The present invention is a workpiece appearance inspection device, wherein the workpiece inspection section is movable along a radial direction of the transfer table, and the control section is a workpiece inspection section that inspects a one-week component of the transfer table on the transfer table. After the spherical workpiece, the workpiece inspection section is moved inward in the radial direction of the transfer table.

The present invention is a workpiece appearance inspection device, wherein the workpiece supply section includes a workpiece storage section for storing the spherical workpiece, a duct connected to the workpiece storage section, and a front end of the duct for decelerating the spherical workpiece. And it is supplied to the speed reduction part on the said transfer table.

The present invention is a workpiece appearance inspection device, wherein a defective product recovery unit that collects defective products is provided on the transfer table.

The present invention is a workpiece appearance inspection device, wherein a good-quality workpiece recovery unit that recovers a good-quality workpiece is provided on the transfer table.

The present invention is a workpiece appearance inspection device, wherein a re-inspection transfer line is provided on the transfer table to transfer the spherical workpiece located on the outer outer edge portion to the inside of the transfer table in the radial direction.

The present invention is a workpiece appearance inspection method, which is a workpiece appearance inspection method for inspecting the appearance of a spherical workpiece, comprising: supplying the spherical workpiece from a workpiece supply unit to a circular shape that can be freely rotated in a horizontal direction; A process on a transfer table made of a transparent body; a process to hold the spherical workpiece on the transfer table by an annular stopper provided on the outer periphery of the transfer table; and a measurement on the transfer table by a workpiece measurement unit The process of measuring the amount of the spherical workpiece; and the process of inspecting the appearance of the spherical workpiece from above and below by a workpiece inspection section disposed on the outermost periphery of the transfer table; and a control section based on the amount of the workpiece from the workpiece According to the information of the measurement unit, when the amount of the spherical workpiece reaches a certain value, the supply of the spherical workpiece from the workpiece supply unit is stopped, and the spherical workpiece is inspected by the workpiece inspection unit while the transfer table is rotated. Appearance.

The present invention is a method for inspecting the appearance of a workpiece, wherein the workpiece inspection section is movable along a radial direction of the transport table, and the control section inspects a one-week component of the transport table on the transport table by the workpiece inspection section. After the spherical workpiece, the workpiece inspection section is moved inward in the radial direction of the transfer table.

The present invention is a method for inspecting the appearance of a workpiece, wherein the workpiece supply section includes a workpiece storage section for accommodating the spherical workpiece, a duct connected to the workpiece storage section, and a front end of the duct for decelerating the spherical workpiece. And it is supplied to the speed reduction part on the said transfer table.

The present invention is a method for inspecting the appearance of a workpiece, wherein a defective product recovery unit for recovering defective products is provided on the transfer table.

The present invention is a method for inspecting the appearance of a workpiece, in which a good-quality workpiece recovery unit that recovers a good-quality workpiece is provided on the transfer table.

The present invention is a method for inspecting the appearance of a workpiece, wherein a re-inspection transfer line is provided on the transfer table to transfer the spherical workpiece located on the outer outer edge portion to the inner side in the radial direction of the transfer table.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, FIG. 1 is a plan view showing a workpiece appearance inspection device according to the present invention, and FIG. 2 is a side view showing a workpiece appearance inspection device.

As shown in FIGS. 1 and 2, the workpiece appearance inspection device 10 is, for example, a person who inspects the appearance of a small spherical workpiece W such as an industrial part or an electronic part.

Such a workpiece visual inspection device 10 includes a transfer table 15 formed of a circularly shaped transparent body that can be freely rotated in a horizontal direction, a workpiece supply section 11A that supplies a spherical workpiece to the transfer table 15, and is provided on the transfer. On the outer periphery of the table 15, an annular stopper 16 that holds the spherical workpiece 15, a transfer table driving mechanism 26 that drives the transfer table 15 in a rotating direction, and a workpiece amount measuring section 17 that measures the amount of the spherical workpiece W on the transfer table 15. And a workpiece inspection unit 18 arranged on the outermost periphery of the transfer table 15 and inspecting the appearance of the spherical workpiece W from above and below.

Among them, the transfer table 15 is made of a transparent body having a circular shape, for example, a soda-lime glass having a circular shape.

The workpiece supply unit 11A includes a workpiece storage unit 11 that stores a large number of spherical workpieces W, a supply ejector 12 that discharges the spherical workpieces W in the workpiece storage unit 11, and is connected to the supply ejector 12 to transport the spherical workpieces W. The duct 13 and the front end of the duct 13 are connected to reduce the speed of the spherical workpiece W transferred from the duct 13 and are supplied to the speed reduction portion 14 on the transfer table 15.

Further, the ring stopper 16 is supplied to the transfer table 15 and is sent to the outer spherical workpiece W by the centrifugal force due to the rotation of the transfer table 15. For example, the ring stopper 16 is made of a resin or metal ring. .

The transport table 15 is driven in a clockwise direction (arrow A in FIG. 1) by a transport table drive mechanism 26 driven by a motor.

Further, the spherical workpiece W is supplied to the transfer table 15 by the centrifugal force due to the rotation of the transfer table 15 and is held by the annular stopper 16 at this time. At this time, the spherical shape on the transfer table 15 is held. The amount (quantity) of the work W is measured by the work amount measurement unit 17.

The workpiece amount measuring unit 17 measures the number of spherical workpieces W on the transfer table 15, but may measure the weight of the spherical workpieces W on the transfer table 15.

The workpiece inspection unit 18 is a person who inspects the appearance of the spherical workpiece W from above and below the transfer table 15. For example, the workpiece inspection unit 18 is a pair of photographic cameras. Appearance, the other photographic camera checks the appearance of the spherical workpiece W from below the transfer table 15.

The workpiece inspection unit 18 can be moved in the radial direction of the transfer table 15 by the workpiece inspection unit drive mechanism 28. After that, the control unit 30 described later inspects the spherical workpiece W on the transfer table 15 of the one-round portion of the transfer table 15 by the workpiece inspection section 18, and then operates the workpiece inspection section driving mechanism 28 to move the workpiece inspection section 18 to the transfer table 15 Moves inward in the radial direction.

Furthermore, a defective product recovery nozzle (also referred to as a defective product recovery unit) 19 that collects defective products on the transfer table 15 is disposed on the transfer table 15. The defective product recovery nozzle 19 is connected to the speed reduction unit 20 through a duct 19a. Then, the defective product recovered by the defective product recovery nozzle 19 is decelerated by the speed reduction unit 20 through the duct 19a, and then stored in the defective product recovery cup 21.

A good product recovery nozzle (also referred to as a good product recovery unit) 23 for recovering good products on the transport table 15 is disposed on the transport table 15. The good-quality workpiece recovery nozzle 23 is connected to the speed reduction unit 24 through a duct 23a. Then, the good-quality workpiece recovered by the good-quality workpiece recovery nozzle 23 is decelerated by the speed reduction unit 24 through the duct 23a, and then stored in the high-quality workpiece recovery cup 25.

Further, a workpiece recovery nozzle (also referred to as a workpiece recovery section) 22 for recovering a spherical workpiece W located on the outer peripheral portion is provided on the transfer table 15. The workpiece recovery nozzle 22 is connected to the speed reduction section 14 through a duct 22 a. Then, the outermost spherical workpiece W recovered by the workpiece recovery nozzle 22 is decelerated by the decelerating portion 14 and transferred to the inner side in the radial direction of the transfer table 15. At this time, the workpiece recovery nozzle 22, the duct 22a, and the deceleration section 14 constitute a re-inspection transfer line 22A for transferring the spherical workpiece W to the inner side in the radial direction of the transfer table 15 at the outer peripheral portion of the transfer table 15. .

In addition, each configuration of the workpiece appearance inspection device 10 described above The components are driven and controlled by the control unit 30.

Next, the effect of this embodiment formed by such a structure, that is, the work appearance inspection method will be described.

First, the spherical workpiece W accommodated in the workpiece storage section 11 is fed by the supply ejector 12 driven by the control section 30 to the duct 13 along with air and sent to the deceleration section 14 to reduce the speed of the spherical workpiece W. Next, the decelerated spherical workpiece W is continuously supplied from the deceleration section 14 to the transfer table 15.

At this time, the spherical workpiece W is supplied to the transfer table 15 between the center and the outermost periphery, that is, the inner side of the outermost periphery.

During this period, the transfer table 15 is rotated by a transfer table driving mechanism 26 driven by the control unit 30.

Therefore, the spherical workpiece W supplied to the transfer table 15 starts to roll toward the outer periphery of the transfer table 15 by centrifugal force. Then, the spherical workpiece W on the transfer table 15 is stopped by the annular stopper 16.

As described above, the spherical workpiece W supplied to the transfer table 15 is continuously supplied from the speed reduction unit 14. In addition, the spherical workpieces W held by the annular stopper 16 are arranged side by side on the outer peripheral portion of the transfer table 15 without a gap. During this period, the number of spherical workpieces W on the transfer table 15 is measured by the workpiece amount measuring unit 17. The measurement result from the workpiece amount measurement section 17 is sent to the control section 30.

The control unit 30 is based on the information from the workpiece quantity measuring unit 17 when the number of spherical workpieces W on the transfer table 15 reaches a certain value, for example, the transfer table 15 includes three rows of side-by-side spherical workpieces W outside the transfer table 15 In the peripheral portion, the workpiece supply unit 11A is controlled to stop the supply of the spherical workpiece W from the speed reduction unit 14.

Next, the control unit 30 controls the workpiece inspection unit 18 while continuously rotating the transfer table 15 to check the appearance of the spherical workpiece W located on the outer peripheral edge portion of the transfer table 15 from above and below the transfer table 15.

In this manner, the spherical workpiece W located on the outer peripheral portion of the upper side of the conveying table 15 is inspected for one round of the conveying table 15.

The inspection result from the workpiece inspection unit 18 is sent to the control unit 30, and the control unit 30 collects the defective workpiece W identified as a defective product from the defective workpiece recovery nozzle 19 based on the inspection result from the workpiece inspection unit 18. The defective product W recovered by the defective product recovery nozzle 19 is transmitted through the duct 19a to the deceleration section 20, and its speed is decelerated and sent to the defective product recovery cup 21.

In this way, among the spherical workpieces W located on the outer peripheral portion on the transfer table 15, after the inspection of the spherical workpieces W of the one-round component of the transfer table 15 is completed, the control unit 30 rotates the transfer table 15. , The workpiece inspection unit driving mechanism 28 is operated, and the workpiece inspection unit 18 is moved inward in the radial direction.

Next, the control unit 30 moves the transporting table 15 with respect to the spherical workpiece W that is positioned further inward than the outermost periphery of the transporting table 15 and, as described above, the workpiece inspecting section 18 starts from The appearance of the spherical workpiece W is checked above and below the transfer table 15. Next, the control unit 30 collects the defective product W identified as a defective product from the defective product recovery nozzle 19 based on the inspection result from the workpiece inspection unit 18, and uses the defective product recovery nozzle 19 to recover the defective product W Then, it is sent to the speed reduction section 20 through the duct 19a, and its speed is reduced and sent to the defective product recovery cup 21.

In this manner, the control unit 30 checks the appearance of all the spherical workpieces W on the transfer table 15 from above and below the transfer table 15, for example.

In this way, after checking the appearance of all the spherical workpieces W on the transfer table 15 from above and below, the control unit 30 operates the re-inspection transfer line 22A while rotating the transfer table 15 and moves the The spherical workpiece W passes through the deceleration portion 14 of the re-inspection transfer line 22A from the outer peripheral portion, and is transferred to the inner side in the radial direction of the transfer table 15 for re-inspection.

The spherical workpiece W transferred to the inner side in the radial direction on the transfer table 15 is rolled by the centrifugal force to the ring stopper 16 with the rotation of the transfer table 15 and is held by the ring stopper 16.

At this time, the spherical workpieces W on the transfer table 15 are held by the ring-shaped stoppers 16 and are arranged side by side on the transfer table 15 without a gap. This state is the same as before the transfer caused by the re-inspection of the transfer line 22A. However, the spherical workpiece W is randomly rotated between the movement to the ring stopper 16 due to the centrifugal force accompanying the transfer and subsequent rotation of the transfer table 15. Therefore, in the surface of the spherical workpiece W held by the annular stopper 16, the range toward the upper side of the transfer table 15 and the range toward the lower side change after the transfer for re-inspection.

Next, in the same manner as described above, the spherical workpieces W on the transfer table 15 are sequentially inspected for appearance from the outermost peripheral side toward the inner row, and the defective workpieces W are recovered by the defective workpiece recovery nozzle 19. In the visual inspection after the transfer, the range of the surface of the spherical workpiece W inspected by the workpiece inspection unit 18 is different from that before the transfer. The reason for this is because, as described above, in the surface of the spherical workpiece W held by the annular stopper 16, the range toward the upper side of the transfer table 15 and the range toward the lower side change after the transfer for re-inspection.

Next, the control unit 30 performs a plurality of transfer operations for re-inspection using the re-inspection transfer line 22A and an appearance inspection by the workpiece inspection unit 18.

In this manner, after the defective workpiece W on the transfer table 15 is repeatedly recovered by the defective workpiece recovery nozzle 19 multiple times, the control unit 30 regards all the spherical workpieces W other than the defective workpiece W on the transfer table 15 as the good workpiece W. And is recovered from the good-quality workpiece recovery nozzle 23.

The good-quality workpiece W recovered by the good-quality workpiece recovery nozzle 23 passes through the duct 23 a and is sent to the deceleration section 24 to be decelerated, and then sent to the good-quality workpiece recovery cup 25.

The control unit 30 continues the above operation until the spherical workpiece W in the workpiece storage unit 11 is emptied.

As described above, according to the present embodiment, the spherical workpiece W moved to the outer peripheral side due to the centrifugal force can be held by the ring-shaped stopper 16 while the transfer table 15 is rotated. Therefore, the spherical workpiece W can be prevented from being damaged in advance, as compared with a case where a circular hole is formed in the transfer table 15 and a spherical workpiece W is inserted into the circular hole. In addition, it is not necessary to produce a conveying table having a round hole by matching the shape of the spherical workpiece each time. Moreover, since the spherical workpieces W can be juxtaposed on the transfer table 15 without a gap, more spherical workpieces W can be juxtaposed on the transfer table 15 than when the spherical workpieces W are inserted into the round holes of the transfer table 15 , Which can improve inspection efficiency.

Furthermore, by re-inspecting the transfer line 22A, the spherical workpiece W located on the outer peripheral portion of the transfer table 15 is transferred to the inner side in the radial direction for re-inspection, and the spherical workpiece W is rolled again to the outer peripheral side. Since the appearance inspection of the spherical workpiece W is performed, the spherical workpiece W can be inspected from multiple directions.

Furthermore, in the foregoing embodiment, the example in which the workpiece inspection section 18 can be moved in the radial direction has been disclosed, but the invention is not limited to this. The workpiece inspection section 18 may be fixed in the radial direction.

Also, an example has been disclosed in which the spherical workpiece W located on the outer peripheral portion of the transfer table 15 is transferred to the inner side in the radial direction of the transfer table 15 by the re-inspection transfer line 22A, but it is not necessary to provide This re-inspection transfer line 22A may be used.

Furthermore, as the deceleration section of the re-inspection transfer line 22A, an example has been disclosed in which the deceleration section 14 of the work supply section 11A is also used. can.

10‧‧‧ Workpiece visual inspection device

11‧‧‧Workpiece storage section

11A‧‧‧Work Supply Department

12‧‧‧Supply ejector

13‧‧‧ Catheter

14‧‧‧ Reduction section

15‧‧‧ transfer station

16‧‧‧Ring stopper

17‧‧‧Workpiece measurement unit

18‧‧‧ Workpiece Inspection Department

19‧‧‧ Defective workpiece recovery nozzle

19a‧‧‧ Catheter

20‧‧‧ Reduction Department

21‧‧‧ Defective Product Recycling Cup

22‧‧‧ Workpiece recovery nozzle

22A‧‧‧Recheck transfer line

22a‧‧‧ Catheter

23‧‧‧Good product recovery nozzle

23a‧‧‧ Catheter

24‧‧‧ Reduction section

25‧‧‧Good Product Recycling Cup

26‧‧‧Transportation table drive mechanism

28‧‧‧ Workpiece inspection department drive mechanism

30‧‧‧Control Department

W‧‧‧ Spherical Workpiece

[Fig. 1] Fig. 1 is a plan view illustrating an embodiment of a workpiece appearance inspection device according to the present invention.图 [Fig. 2] Fig. 2 is a side view of a workpiece visual inspection device.

Claims (12)

A workpiece appearance inspection device, which is a workpiece appearance inspection device for inspecting the appearance of a spherical workpiece, is characterized in that it includes: a conveying table, which is formed by a transparent body of a circular shape that can be freely rotated in a horizontal direction; and a ring stop The device is provided on the outer periphery of the transfer table to hold the spherical workpiece; the workpiece supply unit supplies the spherical workpiece to the transfer table; the transfer table driving mechanism drives the transfer table to rotate; The measurement section measures the amount of the spherical workpiece on the transfer table; the workpiece inspection section is arranged on the outermost periphery of the transfer table and checks the appearance of the spherical workpiece from above and below; and a control section; the control section Based on the information from the workpiece quantity measurement unit, when the amount of the spherical workpiece reaches a certain value, the supply of the spherical workpiece from the workpiece supply unit is stopped, and the conveying table driving mechanism is operated while the conveying is performed. The table is rotated, and the appearance of the spherical workpiece is inspected by the workpiece inspection section. The workpiece appearance inspection device described in item 1 of the scope of patent application, wherein the workpiece inspection unit is movable along the radial direction of the transfer table, and the control unit is the workpiece inspection unit that inspects one week of the transfer table. After the spherical workpiece on the transfer table, the workpiece inspection section is moved inward in a radial direction of the transfer table. The workpiece appearance inspection device described in claim 1 or 2, wherein the workpiece supply section includes a workpiece storage section for storing the spherical workpiece, a duct connected to the workpiece storage section, and a connection to the workpiece storage section. The front end of the duct decelerates the spherical workpiece and supplies the decelerated portion on the transfer table. According to the workpiece appearance inspection device described in the first or second scope of the patent application, a defective product recovery unit that collects defective products is provided on the transfer table. The workpiece appearance inspection device according to the first or second aspect of the patent application scope, wherein a good product recovery unit for recovering a good product is provided on the transfer station. The workpiece appearance inspection device according to item 1 or 2 of the scope of the patent application, wherein the ball-shaped workpiece located at the outer outer edge portion is provided on the transfer table and is transferred to the inner side in the radial direction of the transfer table. Check the transfer line again. A workpiece appearance inspection method is a workpiece appearance inspection method for inspecting the appearance of a spherical workpiece, and is characterized in that the spherical workpiece is supplied from a workpiece supply unit to a transparent body in a circular shape that can be freely rotated in a horizontal direction. The process on the completed transfer table; the process of retaining the spherical workpiece on the transfer table by an annular stopper provided on the outer periphery of the transfer table; and measuring the aforementioned on the transfer table by a workpiece measurement unit Engineering of the amount of spherical workpieces; and engineering of checking the appearance of the spherical workpieces from above and below by a workpiece inspection section disposed on the outermost periphery of the transfer table; and a control section based on the measurement from the workpiece measurement section Information, when the amount of the spherical workpiece reaches a certain value, the supply of the spherical workpiece from the workpiece supply section is stopped, and the appearance of the spherical workpiece is inspected by the workpiece inspection section while rotating the transfer table. . According to the method for inspecting the appearance of a workpiece according to item 7 of the scope of the patent application, the workpiece inspection unit is movable along the radial direction of the transfer table, and the control unit inspects one week of the transfer table by the workpiece inspection unit. After the spherical workpiece on the transfer table, the workpiece inspection section is moved inward in a radial direction of the transfer table. The method for inspecting the appearance of a workpiece according to item 7 or 8 of the scope of application for a patent, wherein the workpiece supply section includes a workpiece storage section for storing the spherical workpiece, a conduit connected to the workpiece storage section, and a connection to the workpiece storage section. The front end of the duct decelerates the spherical workpiece and supplies the decelerated portion on the transfer table. The method for inspecting the appearance of a workpiece as described in item 7 or 8 of the scope of application for a patent, wherein a defective product recovery section for recovering defective products is provided on the transfer station. The method for visually inspecting a workpiece according to item 7 or item 8 of the scope of the patent application, wherein a good product recovery section for recovering a good product is provided at the aforementioned transfer station. The method for visually inspecting a workpiece according to item 7 or item 8 of the scope of the patent application, wherein the spherical workpiece located at the outer edge portion of the outer side is provided on the transporting platform and transferred to the inner side in the radial direction of the transporting platform. Check the transfer line again.