JPH0477270B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is an electronic component used for inspecting electrical characteristics in the manufacturing process of resistors, capacitors, and other chip-type electronic component works. The present invention relates to an inspection machine, and particularly to an inspection machine for electronic components that can accurately inspect.

(Prior art) Conventionally, as an inspection machine for electronic components, a plurality of work stations are provided that penetrate in the axial direction on a predetermined radius of a disc-shaped rotary table, and workpieces are supplied into the workstations. A device is known in which electrical characteristics are tested by bringing a pair of measurement electrodes into contact with each other from both sides of a rotary table.

Generally, a workpiece is attached to a board by soldering, so the surface of the workpiece is plated with solder. This workpiece is then transferred by a linear feeder disposed substantially perpendicular to the rotary table. A feeding section is provided at the end of the linear feeder, and the feeding section is arranged at a position corresponding to a work station of a rotary table that is driven intermittently. The workpieces that are continuously transferred by the linear feeder are separated one by one in the supply section, and the separated workpieces are transferred from the supply section to the work station of the rotary table by air from the air nozzle. Ru. Next, the electrical properties of the workpiece are inspected by a pair of measurement electrodes. Subsequently, the works whose electrical characteristics have been inspected are classified into predetermined ranks.

(Problems to be Solved by the Invention) As mentioned above, the surface of the workpiece is generally plated with solder. Solder from the surface of the workpiece may adhere to the measurement electrode. In this way, the solder attached to the measurement electrode gradually accumulates as the number of tests increases. For this reason, a problem arises in that the contact resistance of the measurement electrode increases and the inspection accuracy decreases.

Conventionally, in such cases, in order to restore inspection accuracy, the electronic component inspection machine was stopped at predetermined intervals, and the operator rubbed the tip of the measurement electrode with sandpaper to remove the solder. cleaning (dressing).

Generally, the measurement electrodes are stored in the measurement section near the rotary table, but when an operator dresses the measurement electrodes, the distance between the rotary table and the pair of measurement electrodes is narrow. It is necessary to remove it from the measuring section to the outside. For this reason, during the dressing operation, the inspection machine is stopped, the pair of measurement electrodes are removed from the measurement section near the rotary table, and the dressing operation is performed on the pair of measurement electrodes outside the measurement section. However, if the inspection machine is stopped each time during the dressing operation and the pair of measurement electrodes are removed from the measurement section, there is a problem in that productivity deteriorates.

The present invention has been made in consideration of these points, and provides an electronic component inspection machine that can quickly dress a pair of measurement electrodes without having to stop the inspection machine each time and remove a pair of measurement electrodes outward. The purpose is to

[Structure of the invention]

(Means for Solving the Problems) The present invention supplies plated workpieces to a plurality of workstations provided axially penetrating a disc-shaped rotary table on a predetermined radius. An electronic component inspection machine configured to inspect electrical characteristics by bringing a pair of measurement electrodes movably arranged forward and backward from both sides of the rotary table into contact with the workpiece, and to classify the workpiece after the inspection is completed, on the predetermined radius of the rotary table,
The present invention is characterized in that an abrasive material is attached that comes into contact with the pair of measurement electrodes and polishes the tips of the pair of measurement electrodes.

(Function) A pair of measuring electrodes is brought into contact with an abrasive material at a predetermined time to polish the tips of the pair of measuring electrodes.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 3 are diagrams showing an embodiment of an electronic component inspection machine according to the present invention. As shown in FIGS. 1 and 2, the electronic component inspection machine includes a disk-shaped rotating rotary table 1, and the rotary table 1 moves on a predetermined radius L of the rotary table 1.
A plurality of workstations 2 are provided extending through the workstation in the axial direction.

Further, a linear feeder (not shown) is disposed on the left side of the rotary table 1 shown in FIG. 5. That is, the supply section 5 is located at the end of the linear feeder, and is also arranged at a position corresponding to the work station 2 of the rotary table 1, which is driven intermittently.
The works 10 that are continuously transported by the linear feeder are separated one by one by a separation section (not shown) provided in the supply section 5. Then, the separated workpiece 10 is transferred to the supply section 5 by air from an air nozzle (not shown) attached to the supply section 5.
From rotary table 1 workstation 2
It is starting to be transferred to Japan. Further, an inspection section 3 for inspecting the workpiece 10 is provided above the rotary table 1. The inspection section 3 includes a pair of measurement electrodes 8 which are arranged to be movable forward and backward with respect to a work 10 in a work station 2 from both sides of the rotary table 1, and a measurement cable 9 connected to the pair of measurement electrodes 8. It consists of

Further, a classification feeder (not shown) is disposed on the right side of the rotary table 1 shown in FIG. This classification section 4
is for classifying the workpieces 10 in the workstation 2 into ranks according to their electrical characteristics,
A plurality of, for example, a first classification section 4a, a second classification section 4b, and a third classification section 4c are provided. Further, a discharge feeder (not shown) is disposed below the rotary table shown in FIG. 1 and substantially perpendicular to the rotary table 1, and the inlet side to this discharge feeder is the discharge section 6. This discharge section 6 is a place for discharging workpieces 10 in the workstation 2 that have poor electrical characteristics. Next, the classification section 4
and the discharge section 6 will be explained. When the workpiece 10 is inspected by the pair of measurement electrodes 8 of the above-mentioned inspection section 3, the inspection signal is input to a discriminating device (not shown), and this discriminating device classifies the workpiece 10 into A, B, or C. It is determined. Further, the discrimination device is electrically connected to the first classification section 4a, the second classification section 4b, and the third classification section 4c of the classification section 4. For example, the workpiece 10 of class A is
When reaching point a, the discharge gate (not shown) of the first sorting section 4a is opened. Next, the workpieces 10 in the workstation 2 are transferred to the first classification section 4a by air from an air nozzle (not shown) provided opposite to the discharge gate with the rotary table 1 in between.
After that, they are transferred from the first sorting section 4a to the sorting feeder.

Similarly, when the class B work 10 reaches the second sorting section 4b, the class B work 10 is transferred into the second sorting section 4b, and the class C work 10 is transferred to the second sorting section 4b.
0 reaches the third sorting section 4c, the work 10 of class C is transferred to the third sorting section 4c.

The workpieces 10 remaining in the workstation 2 without being transferred to any of the first sorting section 4a, the second sorting section 4b and the third sorting section 4c are placed between the rotary table 1 when they reach the discharge section 6. In the discharge section 6
The paper is transferred into the discharge section 6 by air from an air nozzle (not shown) provided opposite to the paper, regardless of the above-mentioned discrimination device, and then sent to the discharge feeder.

On the other hand, a workpiece 10 is supplied into a plurality of workstations 2 of the rotary table 1, and an abrasive material 7 having substantially the same shape as the workpiece 10 is installed in advance in one of the workstations 2.

In addition, as shown in FIGS. 3a and 3b,
The side surface of the workpiece 10 is plated with solder.

Next, the operation of this embodiment having such a configuration will be explained.

First, in the supply section 5, the workpiece 10 of the rotary station 1 is supplied into the workstation 2 while the rotary station 1 is stopped. Subsequently, the rotary station 1 rotates, and when the next work station 2 comes to the supply section 5, it stops again and the next work 10 is supplied.

When the workpieces 10 sequentially supplied in this way arrive at the inspection section 3, the pair of measurement electrodes 8 move forward toward the workpiece 10 while the rotary station 1 is stopped, and the pair of measurement electrodes 8 and the workpiece 10 come into contact with each other. Electrical properties such as capacitance and dielectric loss tangent are tested. Subsequently, the pair of measurement electrodes 8 are moved back and are on standby in preparation for the next workpiece 10. Work 10 after inspection
are classified by the classification unit 4 according to ranks according to their electrical characteristics. For example, first
It is classified through a classification section 4a, a second classification section 4b, and a third classification section 4c. Workpiece 10 with poor electrical characteristics
remains in the workstation 2 without being sorted by the sorting section 4, and is discharged to the outside from the discharging section 7. The sorting work in the sorting section 4 and the discharging work in the discharging section 7 are also carried out while the rotary table 1 is stopped.

In this way, the workpieces 10 are inspected and classified, but during this operation, the workpieces 10 are not fed into the workstation 2 on which the abrasive material 7 is mounted. Further, normally, even when the abrasive material 7 reaches the inspection section 3, the pair of measurement electrodes 8 remain retracted.

A predetermined number of the pair of measurement electrodes 8, for example 1000~
After inspecting 5000 works 10, when the abrasive material 7 comes to the inspection section 3, a pair of measurement electrodes 8 are advanced toward the abrasive material 7 by the measurement electrode moving means and come into contact with the abrasive material 7. Next, the rotary table 1 is slightly rotated, and the tips of the pair of measurement electrodes 8 are polished and dressed with the abrasive material 7. The dressed pair of measurement electrodes 8 are moved back and stand by in preparation for the next inspection of the workpiece 10.

As described above, according to this embodiment, the pair of measurement electrodes 8 to which solder or the like is adhered by contacting a predetermined number of works 10 can be quickly and reliably dressed with the abrasive material 7 at a predetermined time. Therefore, accurate electrical characteristic testing can be performed.

In the above embodiment, an example was shown in which the abrasive material 7 was installed inside the work station 2, but the present invention is not limited to this. May be worn. Further, the number of abrasive materials 7 is not limited to one, and a plurality of abrasive materials may be provided.

〔Effect of the invention〕

According to the present invention, it is possible to quickly and reliably dress a pair of measurement electrodes with an abrasive at a predetermined time, and it is possible to accurately test the electrical characteristics of a workpiece.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of an electronic component inspection machine according to the present invention, and FIG.
FIG. 3a is a side view of the workpiece, and FIG. 3b is a plan view of the workpiece. DESCRIPTION OF SYMBOLS 1... Rotary table, 2... Work station, 3... Inspection section, 4... Classification section, 5... Supply section, 6... Discharge section, 7... Abrasive material, 8... Pair of measurement electrodes, 10...Work.

Claims (1)

[Scope of Claims] 1. A plated workpiece is supplied to a plurality of workstations provided axially penetrating a disc-shaped rotary table on a predetermined radius, and the plated workpiece is provided on both sides of the rotary table. In an electronic component inspection machine configured to inspect electrical characteristics by contacting a pair of measuring electrodes arranged movably back and forth from the rotary table and classifying the workpieces after inspection, , an abrasive material is attached that contacts the pair of measurement electrodes to polish the tips of the pair of measurement electrodes, and when the pair of measurement electrodes inspects a predetermined number of workpieces, the pair of measurement electrodes are moved by the measurement electrode moving means. An inspection machine for electronic parts, characterized in that an electrode is brought into contact with the abrasive material. 2. The electronic component inspection machine according to claim 1, wherein an abrasive material is installed in the work station.