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Automatic Parameter Measurement/Inspection Tool

IP.com Disclosure Number: IPCOM000047890D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 3 page(s) / 47K

Publishing Venue

IBM

Related People

Brady, TE: AUTHOR [+3]

Abstract

This tool will inspect hole diameters, hole roundness, tapped holes, and paint conductivity. As shown in Figs. 1 and 2, the cone 14 screws into an aluminum disc 13 that has two shafts 9, a reversible motor 12, and a multiturn potentiometer 11 mounted to it. The two shafts slide through linear bearings (not shown) that are fixed in an aluminum housing 8. There are springs about each shaft, as shown in Fig. 1b, which compress when the linear bearings with housings slide down over the shafts. There is a "pull" damper 2 with one end fixed to the top of the shafts (Fig. 1) and the other end of the damper fixed to the cover 3, which in turn is fixed to the housings of the linear bearings. This damper prevents a forceful collision between the base 4 and the aluminum disc 13 when the spring is released from compression.

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Automatic Parameter Measurement/Inspection Tool

This tool will inspect hole diameters, hole roundness, tapped holes, and paint conductivity. As shown in Figs. 1 and 2, the cone 14 screws into an aluminum disc 13 that has two shafts 9, a reversible motor 12, and a multiturn potentiometer 11 mounted to it. The two shafts slide through linear bearings (not shown) that are fixed in an aluminum housing 8. There are springs about each shaft, as shown in Fig. 1b, which compress when the linear bearings with housings slide down over the shafts. There is a "pull" damper 2 with one end fixed to the top of the shafts (Fig. 1) and the other end of the damper fixed to the cover 3, which in turn is fixed to the housings of the linear bearings. This damper prevents a forceful collision between the base 4 and the aluminum disc 13 when the spring is released from compression. There is a linear displacement transducer 1 which has one end fixed to the cover and/or housing and a rod which screws into the aluminum disc. The transducer records the relative displacement between the two moving fixtures which are (1) "cover-base- housing" 3, 4, 8 and (2) "cone-shaft-disc" 14, 9, 13. The robotic arm first places the automatic parameter measurement/inspection tool over the hole and then inserts the cone 14 into the hole. The pressure from the robotic arm self-aligns the tool at the center of the hole. This allows the tolerance of the initial placement to be Å radius of the hole with continued pressure, the "cover-base- housing" fixture slides down over the shaft until the base makes contact with the frame. On contact, the tactile sensors shown in Fig. 3 that are incorporated into the base 4, signal the robotic arm, via computer, to hold this pressure and keep the tool in an orthogonal position so the parameters can be instantly inspected. Hole Diameter Measurement As shown in Fig. 1, if there is no hole present, the "cover-base-housing" fixture slides down over the entire length L of the cone 14 (Fig. 4) and the relative displacement between the two movable fixtures ("cover- base-housi...