IP Library › Granted Patent US 10,449,612

Granted Patent B2

US 10,449,612 · App. 15/790,935 · Granted Oct 22, 2019

Methods of milling a piece of raw steel stock into a machine-ready piece of steel

Inventor: Kimm Eric Slater (Grand Rapids, MI)

Assignee: Steel 21, LLC

B23D7/08 B23C3/13 B23C3/14 B23Q3/154 B23C5/06 B23C5/20 B23C2270/08 B23Q3/1543 B25B11/002

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Quick Facts

Patent No.: US 10,449,612
App. No.: 15/790,935
Granted: Oct 22, 2019
Kind: B2

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Abstract

A method of milling a piece of raw steel stock comprising: presenting a piece of raw steel stock having a first surface and a second surface having a perimeter; presenting a magnetic chuck with a top surface configured to support the piece of raw steel stock for milling with magnetic capabilities; arranging a minimum of four solid pole extensions on the top surface to support the second surface of the piece of raw steel stock for milling of the first surface thereof such that the solid pole extensions will be relatively evenly distributed beneath the perimeter of the second surface; arranging multiple mobile pole extensions on the top surface to further support the second surface; placing the second surface onto the multiple mobile pole extensions and the solid pole extensions; activating the magnetic capabilities of the magnetic chuck; and milling the first surface to a desired flatness.

Claims (71)

1. A method of milling a piece of raw steel stock down into to a machine-ready piece of steel comprising:

presenting a piece of raw steel stock having a first surface and a second surface on the opposite side as the first surface, the piece of raw steel stock being at least 36 inches wide by 36 inches long and ½ inch thick or more, and the second surface having a perimeter;

presenting a magnetic chuck with a top surface configured to support the piece of raw steel stock for milling via magnetic capabilities;

determining where on the top surface of the magnetic chuck the second surface of the piece of raw steel stock will be supported for milling of the first surface thereof;

arranging a minimum of four solid pole extensions on the top surface to support the second surface of the piece of raw steel stock for milling of the first surface thereof such that the solid pole extensions will be relatively evenly distributed beneath the perimeter of the second surface of the piece of raw steel stock and within 2 inches of the perimeter; locating a bow in the piece of raw steel stock; and arranging an additional solid pole extension between the top surface and where the bow in the piece of the raw steel stock will be supported for milling;

arranging multiple mobile pole extensions on the top surface to support the second surface of the piece of raw steel stock for milling, each of the multiple mobile pole extensions having a top portion that is biased away from the top surface of the magnetic chuck;

placing the second surface of the piece of raw steel stock onto the top portion of each of the multiple mobile pole extensions and the solid pole extensions, such that each of the mobile pole extensions and each of the solid pole extensions support the piece of raw steel stock;

activating the magnetic capabilities of the magnetic chuck, thus locking the top portion of each of the multiple mobile pole extensions in place at a position matching a contour of the second surface of the piece of raw steel stock; and

milling the first surface of the piece of raw steel stock to a desired flatness.

2. The method of claim 1 ,

wherein, milling the first surface of the piece of raw steel stock includes milling with a face mill including a carbide cutting insert.

3. The method of claim 1 ,

wherein, milling the first surface of the piece of raw steel stock includes milling with a face mill, and the face mill includes only one cutting insert.

4. The method of claim 1 ,

wherein, milling the first surface of the piece of raw steel stock includes milling the first surface until the first surface has an arithmetic mean surface roughness of 21 micrometers or less.

5. The method of claim 1 ,

wherein, milling the first surface of the piece of raw steel stock further includes milling the first surface of the piece of raw steel stock to a flat surface within a tolerance of 0.001 inch per 36 inches.

6. The method of claim 1 further comprising:

removing the piece of raw steel stock after the milling of the first surface thereof;

determining where on the top surface of the magnetic chuck the first surface of the piece of raw steel stock will be supported for milling of the second surface thereof;

arranging a minimum of four solid pole extensions on the top surface to support the first surface of the piece of raw steel stock for milling of the second surface thereof such that the solid pole extensions are relatively evenly distributed under a perimeter of the first surface of the piece of raw steel stock and within 2 inches of the perimeter;

arranging multiple mobile pole extensions on the top surface to support the first surface of the piece of raw steel stock for milling of the second surface thereof, each of the multiple mobile pole extensions having a top portion that is biased away from the top surface of the magnetic chuck;

placing the first surface of the piece of raw steel stock onto the top portion of each of the multiple mobile pole extensions and the solid pole extensions, such that each of the mobile pole extensions and each of the solid pole extensions support the piece of raw steel stock;

milling the second surface of the piece of raw steel stock to a desired flatness;

wherein, milling the second surface of the piece of raw steel stock includes milling the second surface until the second surface has an arithmetic mean surface roughness of 21 micrometers or less; and

wherein, milling the second surface of the piece of raw steel stock further includes milling the second surface of the piece of raw steel stock to a flat surface within a tolerance of 0.001 inch per 36 inches.

7. A method of milling a piece of raw steel stock into to a machine-ready piece of steel comprising:

presenting a piece of raw steel stock having a first surface, a second surface on the opposite side as the first surface, and at least one protrusion at least 5 inches in length;

presenting a magnetic chuck with a top surface configured to support the piece of raw steel stock for milling via magnetic capabilities;

determining where on the top surface of the magnetic chuck the second surface of the piece of raw steel stock will be supported for milling of the first surface thereof;

arranging a minimum of four solid pole extensions on the top surface to support the second surface of the piece of raw steel stock for milling of the first surface thereof such that the solid pole extensions are relatively evenly distributed under a perimeter of the piece of raw steel stock and within 2 inches of the perimeter and at least one solid pole extension will be disposed under each protrusion; before milling the first surface: locating a bow in the piece of raw steel stock; and arranging an additional solid pole extension between the top surface and where the bow in the piece of the raw steel stock will be supported for milling;

milling the first surface of the piece of raw steel stock to a desired flatness.

8. The method of claim 7 ,

wherein, milling the first surface of the piece of raw steel stock includes milling with a face mill including a carbide insert.

9. The method of claim 7 ,

wherein, milling the first surface of the piece of raw steel stock includes milling with a face mill, and the face mill includes only one cutting insert.

10. The method of claim 7 ,

wherein, milling the first surface of the piece of raw steel stock includes milling the first surface until the first surface has an arithmetic mean surface roughness of 21 micrometers or less.

11. The method of claim 7 ,

12. The method of claim 7 further comprising:

removing the piece of raw steel stock after the milling of the first surface thereof;

determining where on the top surface of the magnetic chuck the first surface of the piece of raw steel stock will be supported for milling of the second surface thereof;

arranging a minimum of four solid pole extensions on the top surface to support the first surface of the piece of raw steel stock for milling of the second surface thereof such that the solid pole extensions are relatively evenly distributed under the perimeter of the piece of raw steel stock and within 2 inches of the perimeter and within 2 inches of the perimeter and at least one solid pole extension will be disposed under each protrusion;

milling the second surface of the piece of raw steel stock to a desired flatness;

13. A method of milling a piece of raw steel stock down into to a machine-ready piece of steel comprising:

presenting a piece of raw steel stock having a first surface, a second surface on the opposite side as the first surface, and at least two holes extending from the first surface through to the second surface;

presenting a magnetic chuck with a top surface configured to support the piece of raw steel stock for milling via magnetic capabilities;

determining where on the top surface of the magnetic chuck the second surface of the piece of raw steel stock will be supported for milling of the first surface thereof;

arranging a minimum of four solid pole extensions on the top surface to support the second surface of the piece of raw steel stock for milling of the first surface thereof such that the solid pole extensions will be relatively evenly distributed under a perimeter of the piece of raw steel stock and within 2 inches of the perimeter and at least one solid pole extension will be disposed between the at least two holes; before milling the first surface: locating a bow in the piece of raw steel stock; and arranging an additional solid pole extension between the top surface and where the bow in the piece of the raw steel stock will be supported for milling;

arranging multiple mobile pole extensions on the top surface to support the second surface of the piece of raw steel stock for milling the first surface thereof, each of the multiple mobile pole extensions having a top portion that is biased away from the top surface of the magnetic chuck;

milling the first surface of the piece of raw steel stock to a desired flatness.

14. The method of claim 13 ,

wherein, milling the first surface of the piece of raw steel stock includes milling with a face mill including a carbide insert.

15. The method of claim 13 ,

wherein, milling the first surface of the piece of raw steel stock includes milling with a face mill, and the face mill includes only one cutting insert.

16. The method of claim 13 ,

wherein, milling the first surface of the piece of raw steel stock includes milling the first surface until the first surface has an arithmetic mean surface roughness of 21 micrometers or less.

17. The method of claim 13 ,

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 23, 2017

From: SLATER, KIMM ERIC

To: STEEL 21, LLC

Reel/Frame 043926/0796 →

Continuity (2)

Provisional Application 62411807 · Oct 24, 2016

Related Publication 20180111207A1 · Apr 26, 2018