Browse Prior Art Database

Robotic Helical Insertion Tool for Twist-Lock Parts and Fasteners

IP.com Disclosure Number: IPCOM000038614D
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31
Document File: 3 page(s) / 36K

Publishing Venue

IBM

Related People

Christy, AE: AUTHOR

Abstract

This device is comprised of: 1. A Helical Drive Mechanism such as that of a Yankee screw driver, to be used as a robot tool. 2. A servo-controlled programmable robot with at least 3 degrees of freedom. Two degrees of freedom are required for horizontal translation, and a third degree of freedom is required for part insertion and tool operation, as well as withdrawal of the tool after job completion. 3. A device for sensing forces, either torsional or longitudinal to the insertion motion. In this embodiment, force sensing requirements are provided by the robot's integrated strain gaged fingers which grasp the body of the tool. 4.

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 57% of the total text.

Page 1 of 3

Robotic Helical Insertion Tool for Twist-Lock Parts and Fasteners

This device is comprised of:

1. A Helical Drive Mechanism such as that of a Yankee screw

driver, to be used as a robot tool.

2. A servo-controlled programmable robot with at least 3 degrees

of freedom. Two degrees of freedom are required for

horizontal translation, and a third degree of freedom is

required for part insertion and tool operation, as well as

withdrawal of the tool after job completion.

3. A device for sensing forces, either torsional or longitudinal

to the insertion motion. In this embodiment, force sensing

requirements are provided by the robot's integrated strain

gaged fingers which grasp the body of the tool.

4. A source or supply of organized, oriented parts to be inserted

that requires an insert and twist motion. In this case, an

instrument cluster bulb and socket requiring an insertion of

about 3/4" followed by a 1/4 rotational/locking twist is to be

fed by a vibratory bowl feeder to a single pick-up point.

5. A means by which the tool holds onto the bulb holder. In this

case, an interference socket retains the part by friction to

eliminate grasp and release motions by the robot fingers.

Most any commercial available robot can be used if it has integrated sensing or if an OEM sensor plate is attached to the robot wrist. Various means of providing organized parts can be used in place of the bowl feeder. The use of matrix arranged parts, reels of parts, tubes of parts or parts from belt feeder/orienting mechanisms can be used. Instead of a friction retaining tool, the part can be retained by servoed, electromagnetic, air-actuated graspers as well as vacuum or a tacky substance. Friction was chosen since it takes less time than grasping and is believed to be less complex than vacuum and more durable or reliable than a tacky substance. The part, in this case a twist-lock retai...