JPS5873189A - Structure of hot air nozzle unit for automatic electronic part removing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to printed board package manufacturing equipment, and particularly relates to an improvement in an automatic removal device for flat lead electronic components to be removed from printed boards.

Electronic circuit modules that are mounted in equipment factories to form logic circuits of electronic devices are supplied as printed board packages. Then, in order to convert the circuit module into a pyramid, the printed circuit board package places an electronic component such as a hybrid integrated circuit housed in a U-shaped flat lead casing onto a pattern pad formed to correspond to the flat lead. Increasingly, devices are arranged with high density, and the configuration in which each flat lead and pattern pad are soldered is increasing. When debugging or maintaining and inspecting an electronic device having a logic circuit with such a configuration, it is often necessary to select and replace equivalent parts of the electronic components, and conventionally, this part replacement was done by soldering with a micro-soldering iron or the like. It was done manually by removing it. Such a method lacks workability and often causes heat loss of mounted electronic components due to heating of the printed board, which impairs the productivity and quality reliability of the device. And this 9
In order to cope with such drawbacks, automatic devices having the configuration as described above have been known in the past. That is, the automatic device can be controlled at will.
A vacuum suction nozzle capable of oJ, a hot air nozzle unit with TLl properties arranged around the nozzle, and a hot air generator! A work head comprising an IT, etc., a means for vertically moving the work head arbitrarily orthogonal to the origin of the base, and a predetermined electronic component on a printed board placed thereon can be positioned at the origin. an X-Y table on the base;
and a control device that continuously controls various operations of the work head and the operation of the X-Y table in a pre-programmed predetermined sequence cycle. and!
1't I work head is lowered and the suction nozzle is placed on the back bale pressure #1. After blowing hot air with a predetermined heat capacity from the hot air nozzle unit onto the top surface of the flat lead for a specified time, when the work head is raised by 4 plows, whether the electronic component is attracted and lifted up by t. and if the control device detects the suction of the electronic component, it moves to the sequence cycle of the next component to be removed, and if the control device detects that the component is not suctioned. This was a configuration in which a function was added in which the inching pickup cycle was repeated until a predetermined time limit. However, in such an automatic device, it is necessary to select the hot air nozzle unit for each type of casing of the flat lead electronic component, and the ease with which the hot air nozzle unit can be inspected becomes a problem. For this reason, it was necessary to standardize the nozzle unit so that it can be easily attached and detached using the 8-operation chuck provided on the work head.

The object of the present invention is to provide a hot air nozzle unit with a large violet heat capacity that can satisfy such conditions.

The present invention provides a work head comprising a vacuum installation nozzle that can be controlled arbitrarily, a hot air nozzle unit having a compatible hot air nozzle unit and a hot air starting device, and the like. means for moving the work head upward perpendicularly to the origin of the base; Various operations of the table and the work head and the X-
An apparatus for removing electronic components from a printed circuit board, comprising means for continuously controlling the operation of a Y-table in a pre-programmed predetermined sequence cycle. The hot air nozzle unit is a heat-resistant unit having a through hole through which a suction nozzle can be inserted in the center of the upper surface of the flange, an air storage cavity around the outer circumference of the through hole, and a tapered corner for tightening at the lower edge of the boss. Gold #A# standard board and flannel of specified electronic parts on the bottom surface of the boss of the base board) +
) - A box-shaped pipe nozzle that covers the area without waste,
The stopper pin is characterized by comprising at least one pair of stopper pins arranged symmetrically on the lower surface of the boss so as to protrude by a predetermined distance from the 'F end of the pipe nozzle.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. 1, 2, and 8 are a plan view of the box-shaped hot air nozzle unit of the present invention as seen from above, a side sectional view, and a plan view as seen from the side. 8. Standard base disk consisting of strainer 4' and presser plate 5;
6 is a box-shaped nozzle, and 7 is a stopper bin.

In the figure, a standard base plate 1 is a heat-resistant metal member whose external dimensions are constant regardless of the type of nozzle, and a tapered knee corner 21 at a predetermined angle for tightening is formed on the end surface edge of a boss portion 2. . Then, insert the suction nozzle a shown by the dotted line into the center of the flange surface (see Fig. 2).A circular plate-shaped air strainer 4 is installed in the same shape around the through hole 31 and the through hole with radial ventilation holes. An annular cavity 88 having a concave seat 82 on which a presser plate 5 can be seated is formed, and the strainer 4 and presser foot 5 are standardized.

Then, the standard test disk 1 is hot-aired around the outer circumference of the suction nozzle by means of a not-in-small tightening mechanism equipped with metal, and the free holder that fits into the tapered corner of the boss portion 2 is heated.
passes through the center of the standard base disk, and the hot air outlet and the annular cavity are communicated with each other. The box-shaped hot air nozzle with a large electric heat capacity of the present invention corresponds to the type of electronic component to the homolog number 1 of the base plate 1 having such a configuration, for example, the type shown in FIG. 2. It is possible to accommodate parts and solder 1. to the printed board C. A straight cylindrical box-shaped nozzle 6 of a size that covers the area of the flat lead gd of the cut RDF component without waste is established (a ventilation hole 22 is formed to communicate Th1lf of the nozzle 6 with the cavity 33). Furthermore, in order to maintain a predetermined gap between the end surface of the nozzle 6 and the soldering surface when the back surface of the electronic component is suctioned with the suction nozzle a, a pair of wires slightly longer than the length of the nozzle are used. The stopper bottle 7 is symmetrically placed 1γ on the outside of the nozzle.

Since the box-shaped hot air nozzle having such a configuration is mounted on a standard round board, replacing the nozzle unit in accordance with the type of electronic component can greatly improve capacity and efficiency.

[Brief explanation of the drawing]

1, 2, and 8 show a top plan view, a side sectional view, and a top plan view of the box-shaped hot air nozzle unit of the present invention. In the figure, ■ is a standard base disk, 2 is a boss portion, 8 is a flange portion, 4 is a strainer, 5 is a holding plate, 6 is a box-shaped nozzle, and 7 is a stopper pin. Representative Patent Attorney Hiroshi Matsuoka

Claims (1)

[Claims] In order to selectively remove a plurality of electronic components having flat leads soldered to pattern pads of a printed board from the printed board, a vacuum suction nozzle that can be controlled arbitrarily and a reciprocal four-biting nozzle arranged around the nozzle are used. a work head comprising a hot air nozzle unit and a hot air generator, etc.; means for arbitrarily moving the work head vertically perpendicular to the origin of the base and detecting suction of the electronic component; Various operations of the X-Y table on the base and the work head, which made it possible to position a predetermined electronic component on the printed circuit board at the origin, and the creation and assistance of the X-Y table were programmed in advance. In the apparatus for automatically removing IIIF components from a printed board, the hot air nozzle unit has a through hole through which a suction nozzle can be inserted in the center of the upper surface of the flange. A standard base plate made of a heat-resistant metal having an air storage cavity formed on the outer circumference and a taber corner for tightening on the lower edge of the boss, and the cavity on the lower face of the boss of the base plate communicate with each other. A box-shaped pipe nozzle that completely covers the flat lead area of a predetermined electronic component, which is fixed with a hole, and a box-shaped pipe nozzle that protrudes by a predetermined distance from the end of the pipe nozzle. A structure of a hot air nozzle unit for an automatic electronic parts removal device, characterized in that it is composed of at least one pair of stopper bins arranged symmetrically on the lower surface of a boss.