公开(公告)号：US09797820B2

公开(公告)日：2017-10-24

申请号：US15033234

申请日：2014-11-04

Applicant: ILLINOIS TOOL WORKS INC.

Inventor： William Masek ,  Peter Bermudez ,  Stephen M. McMahon ,  Adrian Riddick ,  Fernando L. Castro

IPC: G01N3/00 ,  G01N3/08 ,  G01N3/02 ,  G01L5/10 ,  G01N3/42 ,  G01L1/04

CPC classification number: G01N3/08 ,  G01L1/04 ,  G01L5/108 ,  G01N3/02 ,  G01N3/42 ,  G01N2203/0012 ,  G01N2203/0204

Abstract: The present disclosure provides an electro-mechanical fuse-type configuration built into the probe that contacts the specimen during materials testing. The design includes an internal pre-loaded compression spring and an electrical contact switch. The coil spring preloaded to the desired safety load results in the probe assembly directly passing the load from the probe tip to the load cell for loads under the point where the spring additionally compresses. Upon deflection of the spring in excess of safety preload, the spring internally compresses within the probe coupling rather than the probe tip continuing to displace into the specimen, thereby switching the state of the electrical contact switch and stopping operation of the materials testing device. In a further configuration, excessive travel of the load cell coupling is detected, and, in response, operation of the materials testing device is stopped.

公开(公告)号：US09797699B2

公开(公告)日：2017-10-24

申请号：US14912199

申请日：2014-08-12

Applicant: ILLINOIS TOOL WORKS INC.

Inventor： William Masek ,  Michael Taliaferro ,  Jeffrey Manney

IPC: G01B5/004 ,  G01B21/04

CPC classification number: G01B5/004 ,  G01B21/04 ,  G05B2219/37608

Abstract: The present disclosure relates to a method in materials testing to automatically locate the center of a feature on or in an object using the off-axis force feedback of a loadcell. In this disclosure, either a simplified model of the product or device being tested, or the product itself, is placed under the loadcell probe with the feature of interest roughly aligned under the probe tip. The probe is driven down into the feature. The product is automatically positioned relative to the probe in the x-direction until the side of the probe contacts the side of the feature. Contact is determined by monitoring the force feedback from the loadcell. When the vertical force from the side-load surpasses a pre-determined setpoint, contact is assumed and the value of the x-position of the product with respect to the probe is recorded. The product is then repositioned in the opposite direction in the x-axis to record the touch load on the other side. The center is then calculated as the average of the x values. The process is repeated along the y-axis. This data is then used to calculate the center of the feature and the product can be positioned at this location so that the probe is centered over the center thereof.