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Automatic Alignment and Placement Mechanism for Special Components

IP.com Disclosure Number: IPCOM000062665D
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Rager, H: AUTHOR

Abstract

For automatically placing special components 1 on circuit boards, the former are gripped at their outer contours by gripper arms 2 of a robot 3 and fed from a load station to the position at which their connector pins 4 are to be fixed within holes of the circuit board. For that purpose, the connector pins must be accurately aligned and their position relative to the gripper arms of the robot and/or their placement position must be accurately determined, considering the following parameters: component tolerances, component placement accuracy and alignment accuracy of connector pins. These parameters are evaluated in an alignment and measuring station 5, a front and a plan view of which is shown in Fig. 1 and Fig. 2, respectively.

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Automatic Alignment and Placement Mechanism for Special Components

For automatically placing special components 1 on circuit boards, the former are gripped at their outer contours by gripper arms 2 of a robot 3 and fed from a load station to the position at which their connector pins 4 are to be fixed within holes of the circuit board. For that purpose, the connector pins must be accurately aligned and their position relative to the gripper arms of the robot and/or their placement position must be accurately determined, considering the following parameters: component tolerances, component placement accuracy and alignment accuracy of connector pins. These parameters are evaluated in an alignment and measuring station 5, a front and a plan view of which is shown in Fig. 1 and Fig. 2, respectively. In alignment and measuring station 5, connector pins 4 are aligned and their position is accurately determined. The principal element of station 5 is a plate 6 which, being supported on balls 9, provided on block 8, is freely horizontally movable within the operating radius of the robot. Plate 6 is provided with throughholes 7, whose arrangement corresponds to that of the connector pins on the components. The exact position of plate 6 is determined by two sensors X1 and X2 in the X-direction and by a sensor Y in the Y-direction. The angular position of plate 6 is derived from the difference of the values measured by sensors X1 and X2. The positioning sequence is as follow...