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Method and apparatus for knurling a workpiece, method of molding an article with such workpiece

A technology for processing workpieces and workpieces, which is applied in the field of groove patterns, and can solve problems such as no specific descriptions, illustrations, or specific methods for knurling processing master tools

Inactive Publication Date: 2007-09-05
3M CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Sprugeon et al. also briefly mention that knurling can be used to make master tools, they do not describe, illustrate or suggest specific methods for knurling master tools

Method used

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  • Method and apparatus for knurling a workpiece, method of molding an article with such workpiece
  • Method and apparatus for knurling a workpiece, method of molding an article with such workpiece
  • Method and apparatus for knurling a workpiece, method of molding an article with such workpiece

Examples

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Effect test

example 1

[0088]An example of the knurl wheel 12 is made as follows. Triangular teeth were cut from a circular wheel with an original diameter of 3.2334 cm (1.273 inches) using a conventional wire EDM (electric discharge machining) process. The diameter of the wire used to cut the teeth was 30 microns (0.0012 inches). The teeth are in a pseudo-random sequence of varying tooth sizes. This sequence is repeated every quarter (90°) of the wheel, ie the pattern is repeated four times around the entire wheel. The knurling wheel is made of CD-636 type tungsten carbide.

[0089] The table below summarizes the details of the pseudo-random pattern of teeth. The pattern consisted of forty-four teeth, each having a tooth height of 0.0356 cm (0.014 inch) measured radially from root to tip. The tooth configuration is determined by the angle and width of the "valleys" cut into the knurl wheel. The "angle" mentioned in the table refers to the angle of the tooth valley cut into the wheel by the wir...

example 2

[0108] The workpiece, a steel roll having a diameter of 20.32 centimeters (8 inches) and a length of 91.4 centimeters (36 inches), was plated with 0.127 centimeters (0.050 inches) of copper having a hardness of 210 to 230 Vickers. The roll was mounted in a Lodge & Shipley lathe and machined to a diameter of 20.562±0.0005 cm (8.0952±0.0002 inches). Next, a 0.2794 millimeter (0.0110 inch) deep, 3.81 centimeter (1.5 inch) wide shoulder was cut into the surface of the end of the workpiece with a 1:10 ramp to the outer diameter of the roll.

[0109] A knurling tool holder 10 described according to the above-mentioned preferred embodiment is mounted on a transverse slide of a lathe. The axis A of the tool holder 10 intersects and is perpendicular to the workpiece longitudinal axis 36 . Mounted on the second side 43 of the shaft 41 is a knurling seat 14 having an axis C and for mounting a knurling wheel at an angle α of 85°. A dial indicator is used to set the plane defined by the ...

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Abstract

A method and apparatus for knurling a workpiece in which the knurl pattern includes grooves of at least two different configurations. The apparatus includes a knurl wheel holder that allows angular rotation of the knurl wheel about the holder longitudinal axis while maintaining the knurl wheel point of contact on the longitudinal axis. The apparatus also includes a knurling wheel that includes teeth of at least two different configurations. Also disclosed is a method of molding a molded article with the knurled workpiece to impart the inverse of the knurl pattern onto the molded article, such a molded article, a method of forming a structured abrasive article with the molded article, and such an abrasive article.

Description

technical field [0001] The present invention relates to a method and apparatus for knurling a workpiece with a pattern of grooves of two or more different configurations, and articles molded from the knurled workpiece. Such molded articles are useful in the manufacture of abrasive articles having structured abrasive coatings on substrates, among other applications. background of the invention [0002] Two knurling methods are known. Knurling is generally performed by the first knurling method known as roll knurling or form knurling. Form knurling is performed by pressing the knurl wheel against the workpiece with sufficient force to plastically deform the outer surface of the workpiece. A second method of knurling, known as cut knurling, is performed by orienting the knurling wheel relative to the workpiece so that the knurling wheel cuts a pattern in the workpiece by removing metal shavings. Cut-off knurled holders and cut-off knurled wheels are available from Dorian Too...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D11/00B23B5/48B23B27/24B24D18/00
CPCB24D11/008Y10S29/023Y10S72/703Y10T82/2585Y10T407/28Y10T82/16967Y10T82/16Y10T82/10Y10T82/2591Y10T82/16114
Inventor T·L·胡普曼
Owner 3M CO