JPH11300429A - Working inspection device for lead frame and its work oil removing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the measuring precision of a lead frame in a working inspection of the lead frame on in-line by arraying a press machine and a picture processing inspection device. SOLUTION: When a lead frame 6 which is press worked with a press machine 3 is brought in a picture processing inspection device 4 to inspect a press worked state, a work oil removing device 11 consisting of suction roll devices 12, 13 which remove a work oil sticking to the lead frame 6 is provided in a transporting path of the lead frame 6 between the press machine 3 and the picture processing inspection device 4, the work oil sticking to the lead frame 6 is removed, and an influence of measuring caused by the work oil is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing and inspection apparatus for forming a lead frame by pressing a hoop material and inspecting a processing state of the lead frame, and a method for inspecting a working oil applied at the time of pressing before the inspection. The present invention relates to a processing oil removing device for removing from a frame.

[0002]

2. Description of the Related Art A lead frame on which an IC (integrated circuit) and the like are mounted is formed by applying a processing oil to a hoop material in advance and sending it to a precision high-speed press machine, where processing such as punching is performed (press processing). Have been. The pressed lead frame is inspected for dents, flaws, punch defects, burrs, etc., and whether the lead frame is formed to a predetermined size.

However, this inspection is very difficult because the lead frame is a fine and precise work, and it has been performed manually by conventional optical inspection equipment because of its low reliability. A high-speed and high-reliability image processing / inspection apparatus has been developed in which the above-mentioned inspection is performed by comparing preset image information with image information of a pressed lead frame. According to this image processing inspection device, the image processing inspection device is arranged for each press working, the press machine is stopped after detecting the defect of the lead frame immediately after the press working, and the countermeasures are taken to manufacture the lead frame. It is conceivable to increase the yield.

FIG. 5 shows the structure of a lead frame processing / inspection apparatus in this case.
The inspection of the lead frame is performed in-line. In FIG. 5, 1 is an uncoiler wound with a hoop material (or a lead frame on which some leads are formed), 2 is a feeding device, 3 is a precision high-speed press machine, 4 is an image processing inspection device, and 5 is an inspection device. A recoiler 7 after winding the lead frame later is a guide.

The hoop material 6 derived from the uncoiler 1
Is applied intermittently by a processing oil application device (not shown) by a feeding device 2 and then intermittently fed into a press machine 3.
A desired lead frame is formed. The lead frame processed by the press machine 3 is sent to the image processing / inspection apparatus 4 where the lead frame is irradiated with light, and image information indicating the processing state of the lead frame is collected from the reflected and transmitted light. The collected image information is collated with preset image information, and if there is a defect in the lead frame, appropriate processing such as stopping the apparatus is performed. The lead frame which has been inspected by the image processing / inspection apparatus 4 is wound up into a recoiler 5 and then moved to the next processing step.

[0006]

However, if the press machine 3 and the image processing / inspection apparatus 4 are arranged as described above to form an in-line lead frame processing / inspection apparatus, the performance of the image processing / inspection apparatus 4 is sufficiently improved. It is not exhibited, and the measurement accuracy of the lead frame becomes poor.

The present invention has been made in view of the above circumstances, and has as its object to arrange a press machine and an image processing / inspection apparatus to enhance the measurement accuracy of a lead frame in in-line processing and inspection of a lead frame.

[0008]

According to the first aspect of the present invention, a press machine and an image processing / inspection apparatus are provided side by side, and a lead frame processed by the press machine is transported to the image processing / inspection apparatus, and is preliminarily provided. In a lead frame processing / inspection device that collates a set image with a processed and formed lead frame image, processing oil adhering to the lead frame is removed from a lead frame transport path between a press machine and an image processing / inspection device. A processing oil removing device is provided.

According to a second aspect of the present invention, there is provided a machining oil removing apparatus, comprising: a hollow fixed shaft having one end closed, a suction port formed at the other end, and a slit formed at a part of the outer periphery to communicate with the inside. A hollow cylindrical roll rotatably mounted on the hollow fixed shaft and having a multiplicity of holes formed in the entire peripheral surface and communicating with the interior. The processing oil adhering to the lead frame passing through the roll is fixed to the hollow fixed shaft. It is characterized in that it is removed by suction from the device.

[0010] It has been found that the cause of disturbing the measurement accuracy of the lead frame in the in-line processing inspection of the lead frame by arranging the press machine and the image processing inspection apparatus is the processing oil attached to the lead frame. This processing oil degrades the reflection and transmission brightness of the light applied to the lead frame, and in particular, the reflection and transmission light from the processing oil remaining in a bridge between narrow leads deteriorates the measurement accuracy.

According to the first aspect of the present invention, a processing oil removing device is provided at a stage prior to the image processing / inspection device so as to remove processing oil attached to a lead frame carried into the image processing / inspection device. Since there is no reflected or transmitted light from oil, measurement accuracy can be increased, and in-line processing inspection of lead frames can be performed with high accuracy.

Further, in the present invention according to the second aspect, for example, the lead frame conveyed to the roll rotated in synchronization with the press machine abuts, so that the effect of the frictional force on the lead frame is small, and the lead is thereby reduced. The deformation of the frame and the deformation of the lead frame due to suction are prevented. Further, since a hollow fixed shaft having a slit is formed inside the hollow of the roll to increase the suction force by the slit, the processing oil attached to the lead frame can be efficiently removed.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a configuration diagram of a processing inspection device for a lead frame according to an embodiment, FIG. 2 is a perspective view of a processing oil removing device in the processing inspection device of FIG. 1, FIG. 3 is a vertical cross-sectional view of a processing oil removing roll of FIG. FIG. 4 is a cross-sectional view of the processing oil removing roll. The same parts as those of the lead frame processing / inspection apparatus shown in FIG. 5 are denoted by the same reference numerals.

In accordance with the present invention, a processing oil removing device 11 for removing processing oil attached to the lead frame 6 on the transport path of the lead frame 6 between the press machine 3 and the image processing / inspection device 4.
Is installed. The lead frame 6 pressed by the press machine 3 passes through the processing oil removing device 11, where the processing oil attached to the lead frame 6 is removed, and the lead frame 6 is carried into the image processing inspection device 4.

The processing oil removing device 11 is composed of a pair of processing oil removing roll devices 12 and 13,
The lead frame 6 is made to pass therethrough at 2 and 13. As shown in FIGS. 3 and 4, the processing oil removing roll device 12 includes shaft fixing plates 14a arranged on both sides,
A hollow fixed shaft 15 having both ends fixed to 14b, and a hollow cylindrical roll 18 rotatably attached to the hollow fixed shaft 15 at both ends by bearings 16 are provided.

The hollow fixed shaft 15 has a slit 15a formed in a part of the outer periphery thereof in the longitudinal direction and communicating with the inside. A suction port 15b to be connected is formed. The width of the slit 15a is appropriate, but when the width is narrow, the suction force is increased. The position of the slit 15 a is set at a position facing the lead frame 6.

The hollow cylindrical roll 18 has a large number of holes (may be meshes) 18a communicating with the inside on the entire peripheral surface, and a gear 17 is fixed to one end. Gear 17
As shown in FIG. 2, meshes with a gear 20 fixed to a rotating shaft of a motor 19, and transmits the rotation of the motor 19 to a hollow cylindrical roll 18. The motor 19 is rotated in synchronization with the press machine 3, and the hollow cylindrical roll 18 is synchronized with the movement of the lead frame 6.

The processing oil removing roll device 13 is configured similarly to the processing oil removing roll device 12. In this case, the motor 19 may be shared. The transmission of the rotational force of the hollow cylindrical roll 18 may be performed by a belt or a chain. In the case of a belt, the wheels 17 and 20 may be changed to pulleys, and in the case of a chain, to sprockets. Furthermore, the hollow cylindrical roll 18 only needs to have a small frictional force with the lead frame 6, and does not necessarily require a driving force of the motor 19 or the like.

The processing oil removing device 11 configured as described above
The lead frame 6 is made up of the processing oil removing roll devices 12, 1
When passing through the roll 18 in contact with the hollow cylindrical roll 18,
The processing oil adhering to the lead frame 6 is sucked and removed through many holes 18a of the hollow cylindrical roll 18 by the suction force of the slit 15a formed in the hollow fixed shaft 15.

In the above-described embodiment, the processing oil removing rolls 12 and 13 are paired as the processing oil removing device 11, but either one may be used. A plurality may be arranged in parallel in the moving direction of the lead frame 6. Also,
The processing oil removing device may blow air to blow off processing oil attached to the lead frame 6. In this case, it is necessary to consider the deformation of the lead frame 6.

[0021]

As described in detail above, according to the present invention,
Since the processing oil adhering to the lead frame is removed before being carried into the image processing inspection device, it is possible to accurately inspect the lead frame, and the press machine and the image processing inspection device are arranged to form an in-line lead frame. A processing inspection device can be obtained, and the yield of manufacturing lead frames can be increased. Further, since the processing oil removing roll device can obtain a strong suction force, the processing oil attached to the lead frame can be reliably removed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a lead frame processing inspection apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view of a processing oil removing device in the processing inspection device of FIG. 1;

FIG. 3 is a longitudinal sectional view of the processing oil removing roll device of FIG. 2;

FIG. 4 is a cross-sectional view of the processing oil removing roll of FIG.

FIG. 5 is a configuration diagram of a conventional lead frame processing / inspection apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hoop material (lead frame) 2 Feeding device 3 Press machine 4 Image processing / inspection device 5 Recoiler 6 Uncoiler 7 Guide 11 Processing oil removal device 12, 13 Processing oil removal roll device 15 Hollow fixed shaft 15a Slit 15b Suction port 16 Bearing 17 Gear 18 Roll 18a Hole 19 Motor

Claims (2)

[Claims] 1. A press machine and an image processing / inspection device are juxtaposed, and a lead frame processed by the press machine is conveyed to the image processing / inspection device so that a preset image and a processed lead frame are formed. In the lead frame processing / inspection apparatus for collating with the image of the above, a processing oil removing apparatus for removing processing oil adhering to the lead frame is provided in a lead frame transport path between the press machine and the image processing / inspection apparatus. A lead frame processing / inspection apparatus. 2. The processing oil removing device according to claim 1, wherein the hollow fixed shaft has a suction port formed at one end and a suction port formed at the other end, and a slit formed in a part of the outer periphery to communicate with the interior. A hollow cylindrical roll rotatably mounted on the fixed shaft and having a plurality of holes formed in the entire peripheral surface thereof and communicating with the inside, wherein the processing oil adhering to the lead frame passing through the roll is supplied to the hollow fixed shaft. A processing oil removing device characterized by being removed by suction from a processing oil.