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Browse Prior Art Database

Lateral Compliance Device

IP.com Disclosure Number: IPCOM000047158D
Original Publication Date: 1983-Oct-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Greenblott, BJ: AUTHOR [+3]

Abstract

On small diameter hole drilling through a bushing in a drill jig or inserting pins into holes, it is virtually impossible to achieve perfect alignment repeatedly with the use of a robot. Misalignment of the drill will cause the drill to bind upon entering the drill bushing, and result in breakage of the drill. It then becomes a time consuming function to replace the broken drill. Similarly, inserting a misaligned pin could result in pin breakage or prevent the pin from entering the hole. Commercial units are available as accommodators; however, they provide multiaxis alignment and require a force that in itself would cause a small drill to break. Furthermore, these units are quite expensive for the functional requirements. The lateral compliance device 10 is designed to move in a lateral direction only.

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Lateral Compliance Device

On small diameter hole drilling through a bushing in a drill jig or inserting pins into holes, it is virtually impossible to achieve perfect alignment repeatedly with the use of a robot. Misalignment of the drill will cause the drill to bind upon entering the drill bushing, and result in breakage of the drill. It then becomes a time consuming function to replace the broken drill. Similarly, inserting a misaligned pin could result in pin breakage or prevent the pin from entering the hole. Commercial units are available as accommodators; however, they provide multiaxis alignment and require a force that in itself would cause a small drill to break. Furthermore, these units are quite expensive for the functional requirements. The lateral compliance device 10 is designed to move in a lateral direction only. Minimal force is necessary to cause the unit to move in the required direction. The device consists of two parallel plates 12 and 14 that are free to slide laterally on the thrust bearings 16. Oil 18 is encapsulated in a doughnut-shaped plastic element 20. The function of this encapsulated oil is to return the unit to its center position when the drill is withdrawn or the gripper 22 returns to its normal position. When the unit is drawn off its center position, force is applied to the encapsulated, oil forcing the oil around the remaining unit. Since the plastic is pliable, it will accommodate the oil that is forced out of the compressed...