Functional rolling master gear, spindle, and arbor compensation
a technology of arbor compensation and rolling master gear, which is applied in the direction of mechanical measuring arrangements, instruments, and mechanical means, etc., can solve the problems of irregular precision master gear, relatively difficult and expensive production of precision master gear, and inability to accurately measure the effect of the master gear
Inactive Publication Date: 2009-10-08
ILLINOIS TOOL WORKS INC
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Benefits of technology
The patent describes a way to test gears in a way that eliminates errors caused by the machine used to test them. The method involves using a master gear and a precision setting master gear to compare the gear teeth and evaluate any errors in the machine used to hold the gear. This allows for more accurate testing of the gear's performance.
Problems solved by technology
Gear testing devices currently available assume that the variations or discrepancies in gear rotation are due to imperfections in the work gear being tested.
Precision master gears are relatively difficult and expensive to produce.
Even with such accurate gears, however, wear and / or damage may create irregularities in the precision master gear, giving imprecise readings.
Also present are errors from the master gear, the master gear spindle and the work gear arbor and spindle.
However, unless the master gear and spindle are frequently calibrated and have a known error, the amount of error attributable to the work gear alone cannot be measured accurately because the error attributable to the work gear is only a portion of the total error present in the apparatus.
The error found in known double flank gear testing methods is the total error of the system and does not isolate the error caused by the work gear.
However, there is no simple way of determining solely the work gear error; in other words, there is no clear, easy way to isolate the error attributable to the work gear from the total error present in the system.
Method used
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[0014]While the present invention is susceptible of embodiment in various forms, there is shown in the drawings and will hereinafter be described a presently preferred embodiment with the understanding that the present disclosure is to be considered an exemplification of the invention and is not intended to limit the invention to the specific embodiment illustrated.
[0015]It should be further understood that the title of this section of this specification, namely, “Detailed Description Of The Invention”, relates to a requirement of the United States Patent Office, and does not imply, nor should be inferred to limit the subject matter disclosed herein.
[0016]Referring now to FIGS. 1-2, an embodiment of the gear testing apparatus is shown for use with a method for providing for error compensating for rolling master gears, master gear spindles, work holding devices, and piece part work holding devices in a functional double flank gear checking apparatus.
[0017]The total error in a functio...
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A method for providing error compensation in a double flank functional gear testing apparatus is disclosed in which a total composite signal is generated and errors due to master gears, master gear spindles, arbors, and work gear holding devices are eliminated from the total composite signal, such that the error due to a work or precision setting master gear is distilled.
Description
BACKGROUND OF THE INVENTION[0001]The present invention is directed to a method for providing error compensation for rolling master gears, master gear spindles, work spindles, work gear holding devices, and the like in a functional double flank gear checking apparatus.[0002]Functional gear testing measures the total effect of gear errors. Also known as total radial composite deviation, testing of the gears involves determining how the gears operate when in contact with one another.[0003]A method normally used to evaluate gear operational efficiency is double flank gear testing. In double flank gear testing, the gears are placed in a tight mesh, producing contact on both flanks of the gear teeth. Generally, the gear being inspected, the work gear, is mounted to a fixed arbor. A master gear is mounted to a fixed or adjustable slide and put in contact with the work gear.[0004]When work gears and master gears are rolled together on rolling fixtures with either fixed or adjustable centers...
Claims
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IPC IPC(8): G01B7/28G01M13/02
CPCG01M13/02
Inventor PATRICK, JEFFREY J.SANTELMAN, DARREN E.
Owner ILLINOIS TOOL WORKS INC