Browse Prior Art Database

Mechanism for Auto-Feeding of Screws to Robot-Operated Screwdriver

IP.com Disclosure Number: IPCOM000039428D
Original Publication Date: 1987-Jun-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 3 page(s) / 78K

Publishing Venue

IBM

Related People

Johnson, WC: AUTHOR

Abstract

A mechanism is described that provides the capability for automatic feeding of screws to a driver assembly, capable of driving into deep holes or enclosed areas, manipulated by a robot. Previously the screws required singular pickup from a pre-established point. This consumed significant cycle time. Figs. 1 and 2 show the Auto-feed Assembly separately, while Fig. 3 shows the Auto-feed Assembly incorporated with the screwdriver assembly. Fig. 4 is present on Assembly View of the Transfer Mechanism. Fig. 1 shows the front view of the Auto-feed Assembly. The vertical cylinder Adapter Plate 1 attaches to the screwdriver Robot Inter (Image Omitted) face along with the Guide Rod Bushing Sub-assembly 12 with screws 3 and 14, respectively.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 54% of the total text.

Page 1 of 3

Mechanism for Auto-Feeding of Screws to Robot-Operated Screwdriver

A mechanism is described that provides the capability for automatic feeding of screws to a driver assembly, capable of driving into deep holes or enclosed areas, manipulated by a robot.

Previously the screws required singular pickup from a pre-established point. This consumed significant cycle time. Figs. 1 and 2 show the Auto-feed Assembly separately, while Fig. 3 shows the Auto-feed Assembly incorporated with the screwdriver assembly. Fig. 4 is present on Assembly View of the Transfer Mechanism. Fig. 1 shows the front view of the Auto-feed Assembly. The vertical cylinder Adapter Plate 1 attaches to the screwdriver Robot Inter

(Image Omitted)

face along with the Guide Rod Bushing Sub-assembly 12 with screws 3 and 14, respectively. The Vertical Cylinder Adapter plate 1 contains a slot which provides clearance for the Compliance (over-drive/travel) Mechanism on the screwdriver assembly A (Fig. 4). The Vertical Movement cylinder 7 is attached to the Adapter plate 1 via two screws 15. Air is supplied to the cylinder 7 via pressure tubes 8. The interface is provided by fittings 13. The Vertical Cylinder Rod 7 is attached to the Screw Transfer Sub-assembly 5. The Screw Transfer Sub-assembly 5 consists of the following:

(Image Omitted)

Screw Shuttle 6

Shuttle Assembly Top

Shuttle Assembly Bottom To complete the assembly, a screw feed tube and block (Fig. 4) are attached. These provide the screw feeding interface. The plastic tube 9 is attached to the Sub-assembly 5 and to the screw feeder bowl (required for orientation of screws). The Shuttle Assembly Cylinder 11 is attached to the Shuttle Assembly bottom. Air is provided by pressure tubes 10 via fittings 13. The horizontal cylinder 11 rod is attached through a hole in the shuttle assembly bottom and top to the screw shuttle 6.

The cylinder 11 provides transfer motion for the screw. 2 pass through the Guide Rod-Bushing Sub-assembly 12 which contains linear bearings or bushings. The guide rods 2 are capped by Vertical Guide Rod Stop Nuts 4. These nuts limit the total travel of the Screw Transfer Assembly 5. The Auto-feed Adapter Assembly B is attached to the Screwdriver Assembly A, as shown in Figs. 3 and 4. A correct driver bit for the screw to be driven must be used. The bit has a magnet imbedded in the tip to help retain the screw. The Assembly B is adjusted by the Stop Nut...