DD218820A3 - ASSISTANCE AID FOR CIRCUIT BOARD, PREFERABLY PRINTED CIRCUITS - Google Patents

Abstract

The invention relates to a device for freely programmable identification of the placement position of various components on circuit boards. The working aperture of the placement aid operating according to the incident light method has two disks arranged parallel to one another, perpendicular to the optical axis of the apparatus and rotatable independently of each other. The first disc has a helical aperture and the second a T-shaped aperture. By rotating both disks whose axis of rotation is the optical axis, a stationary light symbol is projected onto the circuit board according to any desired grid length and angular position of the components to be assembled. Field of application is the manufacturing technological device construction. Fig.2

Description

Title Ger Erfindu.no. ,

. Assembling aid for circuit boards, preferably printed circuits

Field of application of the invention .

Pie invention relates to a device with an electronically controlled working aperture, which is used for freely programmable identification of the placement position of various components on circuit boards, preferably on printed circuits.

Characteristic of the known technical solutions

In order to identify the mounting position of components on printed circuit boards, different devices are known: Devices for mounting equipment that operate in accordance with the reflected light method are described in OE-AS 2716 548. A mounting aid is described which, by means of the movement of the entire device, uses a light spot This dynamic light dot display leads to assignment difficulties between the component and receiving bores in the printed circuit and to negative scattering light phenomena when passing over the reflective circuit trace on the printed circuit board

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Printed circuit board and its absorbent base material. A. Nachoter Nachteilder this device is that the different residence time of the light spot for identifying the polarity of the components to be assembled with he considerable phenomena of tiredness is connected to the manpower and incorrect equipment does not exclude. In the placement aid according to DE-OS 2S35 341 two parallel arranged slide with multiple openings are used as Arbeitsb'iende. Both slides are moved by means of a stepper motor and electromagnet against each other and additionally moved together in the direction of rotation of the working aperture «The generated light symbol of the assembly aid consists of a

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Combination of different individual symbols, which complicates the assignment to the component to be loaded. In addition to the high technical complexity of the device for generating the light symbol 'er.f-or.dert the combination of Einzelsyrabole extensive software for the electronic control of the working aperture ·', ./:. ₇ is furthermore known a pick and place through DE-OS 2 752 145, which also has a rotatable working aperture.

In the center of these working apertures, a circular opening and four slotted apertures offset by 90 ° around the center point are arranged for the light beam. Four lifting members fastened to the projection housing cover these slits. By means of lifting members and a stepper motor, the working aperture is rotated by a certain length. The Lichtsyrabol generated by this device for the assembly of the components also consists of several individual symbols, whereby the disadvantage of their difficult assignment to be assembled component is also present. Furthermore, the light symbols are designed only for a grid length of the receiving bores for the components in the printed circuit * To mark the technically related different grid lengths for the holes for receiving the components, it is therefore necessary to move the respective light symbol between the mounting holes back and forth ,

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This dynamic light point display, apart from the resulting negative stray light, the worker exposed to an unacceptably high psychological stress.

Aim of the invention ;

The object of the invention is to provide a device for displaying the placement positions of Sauteilen on circuit boards, which, despite low gerätetocnnischen effort a high Verfahren.sreverigkeit the assembly ga-LO and reduces the psychological burden on manpower to an acceptable minimum.

Presentation of the essence of the invention .

The invention is therefore based on the object, a device as a placement aid with one of the assembly program

, 5abhängigen, electronically controlled Arbeitsblende to create, with only one dormant light symbol any, grid length of Bauteilanschiüsse and each angular position: for 'the assignment of components to be assembled on the circuit board features and additionally the polarity of the components

> 0 by means of working aperture, which is characterized by little technical effort, signaled on the circuit board. The object of the invention is achieved in that the device as a placement aid, which operates according to the incident light method, has a working aperture, which consists of several, preferably

IS wise two concentric and independent of each other in the optical axis of the placement aid rotatably arranged aperture elements in the form of discs. These diaphragm elements are arranged in a known manner parallel to one another, perpendicular to the optical axis of the assembly aid.

One of these discs has perpendicular to the optical axis a translucent aperture, which is bounded by the curve ei ner spiral. The opening angle of this spiral increases from O to 360 and its radius of curvature linearly with the opening angle f .

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The origin of the spiral is around a fixed amount, the. preferably slightly smaller than the smallest grid length of the components to be assembled is / removed from the pivot point of the disc · · '. ''. In the second disc arranged parallel to the first disc and perpendicular to the optical axis, a translucent T-shaped aperture is introduced such that the point of intersection of the center lines of both strips of the aperture contraction is at the pivot point of this disc.

By rotating the disk with the helical breakthrough with a fixed disk with the T-shaped opening, the light beam is continuously changed according to the required grid length between the component receiving bores.

The marking of the angular position of the components to the circuit board is done by rotating both disks of the working aperture to the optical axis of the projection system · To represent the polarity of the components is in a known manner on one of the discs of the working aperture, preferably on the one with the T-förinigen breakthrough Electromagnet fixed, on which a Abdsckelement is movably mounted for the breakthrough of both discs. Is it necessary in the assembly of the circuit boards to signal the polarity of a component, so are covered by the known Abdeckelementauf one of the discs, the transparent apertures of the discs alternately and released again, whereby the light beam alternately interrupted and thus a flashing of the printed Achieved circuit 'projected light symbol. becomes. ¹ -.-, ..) · .... ^. · .- .- ^:. '·

Hit this erfindungsgecnäßen, electronically controlled working aperture, it is thus possible to hide from a falling on the Arbeitsbend bundle of visible light, a light symbol freely programmable, which is then projected with a lens in a known manner to the underlying circuit board, with length and angular position of the light symbol through Rotation of the discs of the

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b.eitsbiende can be changed arbitrarily, and thus according to the grid length and angular position of a component to be equipped for the Sestüekungsort clearly to identify and in addition to signal the polarity of the component if necessary. -. '.

Exemplary embodiment I

The invention will be explained in more detail with reference to an embodiment. In the process, the drawings of FIGS. 1 to 3 are as follows:

1 shows the placement aid with working

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Fig. 2, the working aperture

3 shows the assignments of the projected light symbols, for example to the pig elements to be equipped;

a) resistance

b) transistor

c) integrated semiconductor circuit

In Fig. 1, the placement aid, consisting of the light generating device 1, the electronically controlled Arbeitsbiende 2 according to the invention , the projection lens 3 and the displacement mechanism 4 is shown, wherein the light generation 1, the electronically controlled working aperture 2 and the projection lens 3, a common housing 26th have

 In the light generating device 1, the concave mirror 6, the halogen lamp 7 and two converging lenses 8, 9 are arranged one behind the other. In the electronically controlled working diaphragm 2, the disc 10 according to the invention is fixedly connected to the first inner ring 12 of the first ball bearing 14

 Next carries the inner ring 12 of the ball bearing 14, the first

Gear 16, which is moved by the arranged on the outside of the housing 25 stepper motor 18 via the pinion 20

 Below and parallel to the first disc 10 is the second disc 11, which is also fixed to the second

Inner ring 13 of the second ball bearing 15 is centrally connected. The inner ring 13 of the second ball bearing 15 carries the second gear 17, which is moved by the outside of the housing 26 further stepper motor 19 via the pinion 21. Both ball bearings 14, 15 are fixed with their outer rings 22,, 23 on the inner wall of the housing 26, that the optical axis of the light generating device 1 is perpendicular to their planes of rotation. ,

On the second gear 17, the electromagnet 24 is fixed, on which the cover member 25 is movably arranged in the form of an 'angled lever. The angled portion of the cover 25 is with his

 . ·. Flat parallel at a short distance below the bottom of the second disc 11.. >

According to the invention Fig. 2, the disc 10 has a translucent aperture 27, which is bounded by the curve of a spiral, whose opening angle Ψ goes from 0 to 360 ° and whose radius of curvature with the angle linear. grows. The distance between the center of the disk 10 _/ and the beginning of the spiral curve at f = O is little smaller than the smallest grid length. The disc 11 has a T-shaped aperture 28 in which the point of intersection of both bars of the T and the disc center coincide. The angled surface of the cover 25 is adjacent to the T-shaped aperture 28 of the disc 11 and pushes in current-carrying electromagnet 24 via the T-shaped aperture 28i

Below the electronically controlled working aperture 2, the projection lens 3 of known type is arranged. The known displacement mechanism 4 is realized in that above the electronically controlled working aperture 2, the housing 26 is gimbaled. Below the electronically controlled working diaphragm 2, the housing 26 has two surfaces arranged at right angles to one another.

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On each surface is ever a plunger and can be moved by means of a stepper motor in the longitudinal direction of the respective plunger.

The operation of the placement aid is as follows: 5, The light coming from the light generating device 1 falls on the electronically controlled working aperture 2 · Here, the lower pane 11 hides the light icon 34 of the form

'. a 7 out. The disk IO arranged above determines the length of the 7-shaped light symbol 34 by the position of its' Off.nun- 27 The projection lens 3 projects the light icon 34 on the printed circuit. 5 x oer By rotating disks 10 and 11 can be the light symbol 34 project in each angular position on the printed circuit. By rotation of the disc 10 relative to the disk 11, the length of the light symbols 34 between a structurally determined min. and max · length as desired

^; , -to change* . , '..' '' '. '. "'.

On the printed circuit 5, according to FIG. 3, the resistor 29, the transistor 30 and the semiconductor integrated circuit 31 are successively contacted. The relevant connection elements 32 of the sac sections 29, 30; 31 are for this purpose passed through the introduced in the printed circuit 5 contact holes 33. The locations at which the connecting elements 32 of the individual components 29, 30, 31 are to be introduced into the receiving bores 33 are to be indicated.

For the display of the Bestückungsortes of the resistor 29, the housing 26 is pivoted so far by means of displacement mechanism 4 in the X and Y direction until the optical axis of the placement aid strikes the Bestückungsort of the resistor 29. Simultaneously with this movement, the disc and disc 11 are rotated according to a control program such that the center of intersection of the center lines of both bars of the light symbol 34 on the first receiving bore 33 and the end portion of the longer bar of the light symbol 34 on the second receiving bore 33 on the printed circuit 5 corresponding Fig. 3 a fall.

For the display of the Bestückungsortes of a transistor 30 according to FIG. 3 b, the housing 25 is pivoted analogously as in resistor 29 to the Sestückungsort of the transistor 30 · - At the same time disc 10 and disc 11 with .teIs. Control program rotated so that the intersection of the center lines of both bars of the light symbol 34 on the receiving bore 33, for example, for the base terminal of the transistor 30 urid the long bars of the light symbol 34 between, the receiving bores 33-; for -the ": Emitter- and Kollek-: to ran schlüß 'of. Transistors 30 fall.

In the case of the transistor 30, for example with four terminals, the end region of the long bar of the light symbol 34 additionally lies above the receiving bore 33 for; the ground terminal of the transistor 30th

For the display of the location of the integrated semiautomatic. conductor circuit 31, the housing 26 is pivoted analogously as in the resistance to the placement of the Halbleiterschalrkrei-.- s 31 '*. ·· / '. V '.' · · -. ... ^"L .. '· At the same time, the discs 10 and 11 are rotated by means of a further control program in such a way -. That the light symbol between the two rows of receiving bores 33 lies .markiert of Figure 3 c the shorter bar of the Lichtsyjnbols.. 34 shows the location of the identification of the pin assignment of the semiconductor circuit 31.

Claims (1)

Erfinduncssnspruch I. Assembly aid for circuit boards, preferably printed circuits, working according to the. Incident light method and consisting of the modules Light generation, freely programmable electronically controlled working aperture, with parallel superimposition, perpendicular to the optical axis of the assembly aid. arranged aperture elements and lens, which are housed in a housing and arranged vertically above the circuit to be equipped3platte..und means of control übe r a displacement mechanism on asr circuit board are movable, characterized in that the aperture elements of Ar ^w \ . · ·. ' Beitsblende of two centrally and independently in the optical axis of the mounting nubs rotatably arranged discs (10; 11) are formed, that the first disc (10) has a translucent .durchdurchbruch .in'Form a spiral whose opening angle Ϋ 3SO and whose Krü>"n- , _"I7iung; sradius Tnit the opening angle f iineaer grows ·· and whose origin point by a fixed Setrag ,, the rungeη preferably smaller than the smallest pitch length of the _{Aufηahmeboh:} for. 20. components to be assembled, from the pivot point of the disk , is arranged remotely and that die.zweite disc (11) a. translucent T-shaped breakthrough and whose fulcrum is at the intersection of the centerlines of the breakthrough contour strips. Dazu_jäl-rare drawings