CA2747897A1 - Using phase change expansion of a substance to perform work on a workpiece - Google Patents
Using phase change expansion of a substance to perform work on a workpiece Download PDFInfo
- Publication number
- CA2747897A1 CA2747897A1 CA2747897A CA2747897A CA2747897A1 CA 2747897 A1 CA2747897 A1 CA 2747897A1 CA 2747897 A CA2747897 A CA 2747897A CA 2747897 A CA2747897 A CA 2747897A CA 2747897 A1 CA2747897 A1 CA 2747897A1
- Authority
- CA
- Canada
- Prior art keywords
- workpiece
- hollow interior
- interior space
- container
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/005—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by thermal expansion or evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/06—Bending rods, profiles, or tubes in press brakes or between rams and anvils or abutments; Pliers with forming dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Press Drives And Press Lines (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Apparatus and method for working of a workpiece use the expansion of water in a container during the freezing process to drive a piston against a workpiece that is positioned to at least partially overlie a cross-sectional area of a hollow interior of the container. Use of a piston with a tapered working end focuses the resulting force against a small area of the workplece in order to produce a bend in the workpiece at the point of application. In environments where conventional bending tools are not available, the apparatus can be used to perform bending or other operations on workpieces of varying materials.
Claims (26)
1. Apparatus for working of a workpiece, the apparatus comprising:
a container comprising a hollow interior space for receipt of a substance known to expand when transitioning from one phase to another;
a closure member for closing off a respective end of the hollow interior space of the container in a fluid-tight manner containing the substance within the hollow cylindrical interior space at said respective end.
a piston slidable within a cylindrical portion of the hollow interior space of the container along an axis of said hollow interior space;
a fluid-tight seal between the piston and a boundary wall closing around the axis of the hollow space for containing the substance within the hollow interior space between the piston and the closure member; and a workpiece support feature arranged to support the workpiece in a position placing at least. part of the workpiece over a cross-sectional area of the hollow interior space of the container.
a container comprising a hollow interior space for receipt of a substance known to expand when transitioning from one phase to another;
a closure member for closing off a respective end of the hollow interior space of the container in a fluid-tight manner containing the substance within the hollow cylindrical interior space at said respective end.
a piston slidable within a cylindrical portion of the hollow interior space of the container along an axis of said hollow interior space;
a fluid-tight seal between the piston and a boundary wall closing around the axis of the hollow space for containing the substance within the hollow interior space between the piston and the closure member; and a workpiece support feature arranged to support the workpiece in a position placing at least. part of the workpiece over a cross-sectional area of the hollow interior space of the container.
2. Apparatus for working of a workpiece, the apparatus comprising:
a container comprising a hollow interior space containing a substance known to expand when transitioning from one phase to another;
a closure member closing off a respective and of the hollow interior space of the container in a fluid-tight manner.
a piston slidably disposed within a cylindrical portion of the hollow interior space of the container;
a fluid-tight seat between the piston and a boundary wall closing around the axis of the hollow space to contain the substance within the hollow interior space between the fluid tight seal and the closure member; and a workpiece support feature arranged to support the workpiece in a position placing at least part of the workpiece over a cross-sectional area of the hollow interior space of the container.
a container comprising a hollow interior space containing a substance known to expand when transitioning from one phase to another;
a closure member closing off a respective and of the hollow interior space of the container in a fluid-tight manner.
a piston slidably disposed within a cylindrical portion of the hollow interior space of the container;
a fluid-tight seat between the piston and a boundary wall closing around the axis of the hollow space to contain the substance within the hollow interior space between the fluid tight seal and the closure member; and a workpiece support feature arranged to support the workpiece in a position placing at least part of the workpiece over a cross-sectional area of the hollow interior space of the container.
3. The apparatus of claim 1 wherein the workpiece support feature comprises a workpiece passage extending into said container and passing through the hollow interior space thereof at a distance from the closure member for receipt of the workpiece in the passage in a position placing a part of the workpiece within the hollow interior of the container.
4. The apparatus of claim 2 wherein the workpiece support feature comprises a workpiece passage extending into said container and passing through the hollow interior space on a side of the piston opposite the closure member for receipt of the workpiece in the passage in a position placing part of the workpiece within the hollow interior of the container.
5. The apparatus of claim 3 or 4 wherein the workpiece passage comprises a cylindrical bore.
6. The apparatus of any one of claims 1 to 5 wherein the closure member is removably engagable to the container for selective opening and closing of the respective end of the hollow interior space.
7. The apparatus of claim 6 wherein the closure member and the container are matingly threaded.
8. The apparatus of ay one of claims 1 to 7 wherein a working end of the piston comprises a non-planar surface for working the workpiece.
9. The apparatus of claim 8 wherein the working end of the piston is at least partially conical.
10. The apparatus of 8 wherein the working end of the piston is wedge-shaped.
11. The apparatus of any one of claims 1 to 10 further comprising a cover for closing off a second end of the hollow interior space.
12. The apparatus of claim 11 wherein the cover is selectively engagable to and removable from the container.
13. The apparatus of any one of claims 1 to 12 wherein the piston is one of a plurality of differently shaped pistons selectable for use within the hollow interior.
14. The apparatus of claim 13 wherein each piston comprises a peaked end tapering at a respectively different angle.
15. The apparatus of claim 2 wherein the substance expands as it transitions into a solid state.
16. The apparatus of claim 15 wherein the substance is water.
17. A method of working a workpiece, the method comprising:
(a) providing a container comprising a hollow interior space that has at least one closed end and contains a substance known to expand when transitioning from one phase to another;
(b) positioning the workpiece in a manner holding at least part of the workpiece over a cross-sectional area of the hollow interior space of the container;
and (c) with the substance contained between the closed end of the hollow interior space and a piston slidably disposed within a cylindrical portion of the hollow interior space, causing the substance to transition from the one phase to the other to force the piston against the workpiece to perform a working operation thereon.
(a) providing a container comprising a hollow interior space that has at least one closed end and contains a substance known to expand when transitioning from one phase to another;
(b) positioning the workpiece in a manner holding at least part of the workpiece over a cross-sectional area of the hollow interior space of the container;
and (c) with the substance contained between the closed end of the hollow interior space and a piston slidably disposed within a cylindrical portion of the hollow interior space, causing the substance to transition from the one phase to the other to force the piston against the workpiece to perform a working operation thereon.
18. The method of claim 17 wherein step (b) comprises inserting the workpiece into a workpiece passage that extends into the container and passes through the hollow interior space thereof on a side of the piston opposite the closure member.
19. The method of claim 17 or 18 wherein step (c) comprises causing the substance to solidify.
20. The method of claim 17 or 18 wherein step (c) comprises cooling the substance.
21. The method of claim 17 or 18 wherein step (c) comprises freezing the substance.
22. The method of any one of claims 17 to 21 wherein the substance is water.
23. The method of any one of claims 17 to 21 wherein forcing the piston against the workpiece in step (c) forms a bend in the workpiece.
24. The method of any one of claims 17 to 22 wherein step (c) comprises forcing a tapered end of the piston against the workpiece.
25. The method of claim 24 wherein the tapered end is conically tapered.
26. The method of claim 24 wherein the tapered end is wedge-shaped.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2747897A CA2747897C (en) | 2011-08-03 | 2011-08-03 | Using phase change expansion of a substance to perform work on a workpiece |
JP2012146128A JP2013035062A (en) | 2011-08-03 | 2012-06-28 | Using phase change expansion of substance to perform work on workpiece |
US13/539,079 US20130031898A1 (en) | 2011-08-03 | 2012-06-29 | Using phase change expansion of a substance to perform work on a workpiece |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2747897A CA2747897C (en) | 2011-08-03 | 2011-08-03 | Using phase change expansion of a substance to perform work on a workpiece |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2747897A1 true CA2747897A1 (en) | 2011-10-11 |
CA2747897C CA2747897C (en) | 2012-10-16 |
Family
ID=44786906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA2747897A Expired - Fee Related CA2747897C (en) | 2011-08-03 | 2011-08-03 | Using phase change expansion of a substance to perform work on a workpiece |
Country Status (3)
Country | Link |
---|---|
US (1) | US20130031898A1 (en) |
JP (1) | JP2013035062A (en) |
CA (1) | CA2747897C (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103334910B (en) * | 2013-07-04 | 2015-10-28 | 吉林大学 | A kind of squeezing unit of the internal pressure utilizing the sell of one's property of water freezing phase raw |
CN104819088B (en) * | 2015-03-31 | 2017-05-17 | 周红军 | Water-ice phase change power generation system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2302953A (en) * | 1940-07-23 | 1942-11-24 | Hydraulic Dev Corp Inc | Method of metal stretching, using blank-holder types of presses |
US3751956A (en) * | 1971-09-27 | 1973-08-14 | I P Spa Sa | Fluid-dynamic press for the cold forming of sheet metal |
CH666857A5 (en) * | 1984-11-27 | 1988-08-31 | Heinrich Schmid Maschinen Und | SWASH PRESS. |
US4807855A (en) * | 1987-07-24 | 1989-02-28 | Suspa, Incorporated | Gas cylinder plunger lock |
US5065607A (en) * | 1989-10-30 | 1991-11-19 | Teledyne Industries, Inc. | Piston and cylinder assembly |
US5819573A (en) * | 1997-06-17 | 1998-10-13 | Seaman; Roy C. | Hydraulic forming of workpieces from sheet metal |
JP3850663B2 (en) * | 1998-07-23 | 2006-11-29 | テレダイン・インダストリーズ・インコーポレーテッド | Low contact force spring |
US6332318B1 (en) * | 2000-04-28 | 2001-12-25 | Lucent Technologies Inc. | Solidification engine and thermal management system for electronics |
US8683803B2 (en) * | 2007-01-24 | 2014-04-01 | Ashraf F. Bastawros | Method and apparatus for energy harvesting through phase-change induced pressure rise under cooling conditions |
-
2011
- 2011-08-03 CA CA2747897A patent/CA2747897C/en not_active Expired - Fee Related
-
2012
- 2012-06-28 JP JP2012146128A patent/JP2013035062A/en active Pending
- 2012-06-29 US US13/539,079 patent/US20130031898A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
JP2013035062A (en) | 2013-02-21 |
US20130031898A1 (en) | 2013-02-07 |
CA2747897C (en) | 2012-10-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20190806 |