US20100263427A1 - Tube and machining device and method for manufacturing the same - Google Patents
Tube and machining device and method for manufacturing the same Download PDFInfo
- Publication number
- US20100263427A1 US20100263427A1 US12/535,012 US53501209A US2010263427A1 US 20100263427 A1 US20100263427 A1 US 20100263427A1 US 53501209 A US53501209 A US 53501209A US 2010263427 A1 US2010263427 A1 US 2010263427A1
- Authority
- US
- United States
- Prior art keywords
- tube
- cavity
- workpiece
- punch
- unloading
- 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.)
- Abandoned
Links
- 238000003754 machining Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000005242 forging Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
Definitions
- the present disclosure generally relates to a tube and a machining device and a method for manufacturing the same.
- the drawing process easily causes stress concentrations. Thicknesses of a tube formed by a drawing die from a top portion to a bottom portion are different, with a sidewall at the top portion being the thickest and a connecting portion between the sidewall and a bottom wall being the thinnest. Thus, the connecting portion may be fractured when the tube is continuously and excessively drawn. Ratios of height to width of the tube are accordingly limited to within 9:1, especially when an angle formed by the bottom wall and the sidewall requires tapering, where the height to width ratio of the tube is limited to within 6:1. Accordingly, when the height to width ratio of a tube exceeds 9:1 and when the angle formed by the bottom wall and the sidewall requires tapering, welding is employed to attach two or more parts together.
- the tube formed by such welding may exhibit welding seams or marks, affecting the exterior appearance of the tube.
- FIG. 1 is a schematic cross-section of one embodiment of a workpiece.
- FIG. 2 is a schematic cross-section of one embodiment of a machining device shown with the workpiece in FIG. 1 not yet machined.
- FIG. 3 is a schematic cross-section of the machining device of FIG. 2 , shown with the workpiece having been machined.
- FIG. 4 is a flowchart of one embodiment of a manufacturing method of the machining device in FIG. 3 .
- FIG. 5 is a schematic cross-section of one embodiment of a tube formed from the workpiece in FIG. 1 by the machining device in FIG. 2 .
- a workpiece 10 includes a sidewall 13 , a bottom wall 14 , and a slot 11 enclosed thereby.
- the workpiece 10 can be made of aluminum formed by forging and backward extrusion. Alternatively, the workpiece 10 may also be made of steel or other metallic material.
- a machining device 50 includes a punch 20 and a cavity die 30 .
- Unilateral clearance A between the punch 20 and the cavity die 30 is less than a thickness B of the sidewall 13 .
- the unilateral clearance A is less than the thickness B by about 0.35 millimeters (mm) to about 0.5 mm.
- the cavity die 30 includes a cavity 31 and an extruding portion 32 .
- the extruding portion 32 is curved with a radius not less than the difference between the thickness B of the sidewall 13 and the unilateral clearance A to prevent the workpiece 10 from fracturing during extruding.
- Each unloading subassembly 33 includes an unloading member 37 and an elastic member 35 resisting the unloading member 37 .
- the elastic member 35 is a compression spring.
- An end of the unloading member 37 away from the spring 35 forms a resisting portion 38 protruding adjacent to an edge of the cavity 31 .
- the resisting portion 38 includes a guiding surface 381 and a planar surface 383 opposite to each other.
- the guiding surface 381 faces the cavity 31 , such that the workpiece 10 passes through the unloading subassemblies 33 .
- the guiding surface 381 is curved.
- the guiding surface 381 of the resisting portion 38 can be angled or any other shape that would facilitate the workpiece 10 sliding to resist the unloading member 37 and compress the elastic member 35 .
- one embodiment of a method of manufacturing a tube includes providing the workpiece 10 and the machining device 50 , sleeving the workpiece 10 on one end of the punch 20 of the machining device 50 , with the punch 20 and the workpiece 10 moving towards the cavity 30 .
- the sidewall 13 is extruded to a thickness equal to a unilateral clearance A. Reduced material on the transverse direction of the sidewall 13 moves in the longitudinal direction of the punch 20 to coat the punch 20 .
- the workpiece 10 resists the guiding surface 381 of each unloading member 37 , and slides each unloading member 37 to compress each corresponding elastic member 35 .
- the workpiece 10 passes through the resisting portion 38 of each unloading member 37 , and a tube 15 is formed.
- the elastic members 35 of the unloading subassemblies 33 rebound to return the unloading member 37 to resist the punch 20 .
- the tube 15 is removed from the punch 20 by the planar surface 383 of the unloading member 37 generating force on the tube 15 , which is unloaded accordingly.
- the tube 15 as disclosed includes a sidewall 18 , a bottom wall 19 , and a slot 17 enclosed by the sidewall 18 and the bottom wall 19 .
- the workpiece 10 can be machined several times.
- the tube 15 is formed by the machining device 50 such that reducing material on the transverse direction of the sidewall 13 moves along the longitudinal axis of the punch 20 to increase the height H, and during machining of the workpiece 10 into the tube 15 , stress concentration is avoided.
- the ratio of the height H to the width D of the tube 15 can exceed 9:1, even when an angle ⁇ formed by the bottom wall 19 and the sidewall 18 requires tapering, in which case the height to width ratio of the tube can exceed 6:1.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
Description
- 1. Technical Field
- The present disclosure generally relates to a tube and a machining device and a method for manufacturing the same.
- 2. Description of Related Art
- Recently, drawing dies are widely used to form tubes.
- However, the drawing process easily causes stress concentrations. Thicknesses of a tube formed by a drawing die from a top portion to a bottom portion are different, with a sidewall at the top portion being the thickest and a connecting portion between the sidewall and a bottom wall being the thinnest. Thus, the connecting portion may be fractured when the tube is continuously and excessively drawn. Ratios of height to width of the tube are accordingly limited to within 9:1, especially when an angle formed by the bottom wall and the sidewall requires tapering, where the height to width ratio of the tube is limited to within 6:1. Accordingly, when the height to width ratio of a tube exceeds 9:1 and when the angle formed by the bottom wall and the sidewall requires tapering, welding is employed to attach two or more parts together.
- The tube formed by such welding may exhibit welding seams or marks, affecting the exterior appearance of the tube.
- Thus, a tube, machining device and a method for manufacturing the same are desirable to overcome the described limitations.
- Many aspects of the embodiments can be better understood with references to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout several views, and all the views are schematic.
-
FIG. 1 is a schematic cross-section of one embodiment of a workpiece. -
FIG. 2 is a schematic cross-section of one embodiment of a machining device shown with the workpiece inFIG. 1 not yet machined. -
FIG. 3 is a schematic cross-section of the machining device ofFIG. 2 , shown with the workpiece having been machined. -
FIG. 4 is a flowchart of one embodiment of a manufacturing method of the machining device inFIG. 3 . -
FIG. 5 is a schematic cross-section of one embodiment of a tube formed from the workpiece inFIG. 1 by the machining device inFIG. 2 . - Referring to
FIG. 1 , one embodiment of aworkpiece 10 includes asidewall 13, abottom wall 14, and aslot 11 enclosed thereby. Theworkpiece 10 can be made of aluminum formed by forging and backward extrusion. Alternatively, theworkpiece 10 may also be made of steel or other metallic material. - Referring to
FIG. 2 , one embodiment of amachining device 50 includes apunch 20 and a cavity die 30. Unilateral clearance A between thepunch 20 and thecavity die 30 is less than a thickness B of thesidewall 13. In the illustrated embodiment, the unilateral clearance A is less than the thickness B by about 0.35 millimeters (mm) to about 0.5 mm. - The cavity die 30 includes a
cavity 31 and anextruding portion 32. The extrudingportion 32 is curved with a radius not less than the difference between the thickness B of thesidewall 13 and the unilateral clearance A to prevent theworkpiece 10 from fracturing during extruding. - Two
unloading subassemblies 33 are positioned on one end of the cavity die 30 away from the extrudingportion 32, at opposite sides of thecavity 31. Eachunloading subassembly 33 includes anunloading member 37 and anelastic member 35 resisting the unloadingmember 37. In the illustrated embodiment, theelastic member 35 is a compression spring. An end of the unloadingmember 37 away from thespring 35 forms a resistingportion 38 protruding adjacent to an edge of thecavity 31. The resistingportion 38 includes a guidingsurface 381 and aplanar surface 383 opposite to each other. The guidingsurface 381 faces thecavity 31, such that theworkpiece 10 passes through theunloading subassemblies 33. In the illustrated embodiment, the guidingsurface 381 is curved. The guidingsurface 381 of the resistingportion 38 can be angled or any other shape that would facilitate theworkpiece 10 sliding to resist the unloadingmember 37 and compress theelastic member 35. - Referring to
FIGS. 2 through 4 , one embodiment of a method of manufacturing a tube includes providing theworkpiece 10 and themachining device 50, sleeving theworkpiece 10 on one end of thepunch 20 of themachining device 50, with thepunch 20 and theworkpiece 10 moving towards thecavity 30. As theworkpiece 10 resists theextruding portion 32 of the cavity die 30 and continues to move downwards, thesidewall 13 is extruded to a thickness equal to a unilateral clearance A. Reduced material on the transverse direction of thesidewall 13 moves in the longitudinal direction of thepunch 20 to coat thepunch 20. During the action of thepunch 20 and theworkpiece 10, theworkpiece 10 resists the guidingsurface 381 of each unloadingmember 37, and slides each unloadingmember 37 to compress each correspondingelastic member 35. As such, theworkpiece 10 passes through the resistingportion 38 of eachunloading member 37, and atube 15 is formed. Theelastic members 35 of the unloading subassemblies 33 rebound to return the unloadingmember 37 to resist thepunch 20. As thepunch 20 moves out of thecavity die 30, thetube 15 is removed from thepunch 20 by theplanar surface 383 of the unloadingmember 37 generating force on thetube 15, which is unloaded accordingly. - Referring to
FIG. 5 , thetube 15 as disclosed includes asidewall 18, abottom wall 19, and aslot 17 enclosed by thesidewall 18 and thebottom wall 19. To meet the required ratio of height H to width B for thetube 15, theworkpiece 10 can be machined several times. Thetube 15 is formed by themachining device 50 such that reducing material on the transverse direction of thesidewall 13 moves along the longitudinal axis of thepunch 20 to increase the height H, and during machining of theworkpiece 10 into thetube 15, stress concentration is avoided. The ratio of the height H to the width D of thetube 15 can exceed 9:1, even when an angle θ formed by thebottom wall 19 and thesidewall 18 requires tapering, in which case the height to width ratio of the tube can exceed 6:1. - Finally, while various embodiments have been described and illustrated, the disclosure is not to be construed as being limited thereto. Various modifications can be made to the embodiments by those skilled in the art without departing from the true spirit and scope of the disclosure as defined by the appended claims.
Claims (16)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200910301718A CN101869938A (en) | 2009-04-21 | 2009-04-21 | Processing device, processing method of processing device and cylindrical part prepared by processing method |
CN200910301718.3 | 2009-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100263427A1 true US20100263427A1 (en) | 2010-10-21 |
Family
ID=42979959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/535,012 Abandoned US20100263427A1 (en) | 2009-04-21 | 2009-08-04 | Tube and machining device and method for manufacturing the same |
Country Status (2)
Country | Link |
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US (1) | US20100263427A1 (en) |
CN (1) | CN101869938A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108213158A (en) * | 2017-12-25 | 2018-06-29 | 东莞捷荣技术股份有限公司 | Based on the thinning impact forming method of mobile phone battery cover side wall, battery cover and mobile phone |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3893326A (en) * | 1972-11-16 | 1975-07-08 | Wmf Wuerttemberg Metallwaren | Apparatus for reduction drawing of hollow bodies of stainless steel |
USRE28511E (en) * | 1969-12-30 | 1975-08-12 | Shaping of hollow workpieces | |
US4287713A (en) * | 1978-01-03 | 1981-09-08 | Monsanto Company | Process for low-torque textured yarn |
US4541265A (en) * | 1979-06-07 | 1985-09-17 | Purolator Products Inc. | Process for forming a deep drawn and ironed pressure vessel having selectively controlled side-wall thicknesses |
US5179854A (en) * | 1989-05-17 | 1993-01-19 | Toy Seikan Kaisha Ltd. | Process for production of draw-ironed can |
US5544517A (en) * | 1993-12-22 | 1996-08-13 | Toyo Kohan Co., Ltd. | Method of redrawing a predrawn coated metal can |
US5732587A (en) * | 1996-02-26 | 1998-03-31 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Metallic workpiece having to-be-ironed section and method for forming the same |
US6014883A (en) * | 1998-06-08 | 2000-01-18 | Can Industry Products, Inc. | Apparatus and method for forming cup-shaped members |
US6205831B1 (en) * | 1998-10-08 | 2001-03-27 | Rayovac Corporation | Method for making a cathode can from metal strip |
US7726165B2 (en) * | 2006-05-16 | 2010-06-01 | Alcoa Inc. | Manufacturing process to produce a necked container |
-
2009
- 2009-04-21 CN CN200910301718A patent/CN101869938A/en active Pending
- 2009-08-04 US US12/535,012 patent/US20100263427A1/en not_active Abandoned
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE28511E (en) * | 1969-12-30 | 1975-08-12 | Shaping of hollow workpieces | |
US3893326A (en) * | 1972-11-16 | 1975-07-08 | Wmf Wuerttemberg Metallwaren | Apparatus for reduction drawing of hollow bodies of stainless steel |
US4287713A (en) * | 1978-01-03 | 1981-09-08 | Monsanto Company | Process for low-torque textured yarn |
US4541265A (en) * | 1979-06-07 | 1985-09-17 | Purolator Products Inc. | Process for forming a deep drawn and ironed pressure vessel having selectively controlled side-wall thicknesses |
US5179854A (en) * | 1989-05-17 | 1993-01-19 | Toy Seikan Kaisha Ltd. | Process for production of draw-ironed can |
US5544517A (en) * | 1993-12-22 | 1996-08-13 | Toyo Kohan Co., Ltd. | Method of redrawing a predrawn coated metal can |
US5732587A (en) * | 1996-02-26 | 1998-03-31 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Metallic workpiece having to-be-ironed section and method for forming the same |
US6014883A (en) * | 1998-06-08 | 2000-01-18 | Can Industry Products, Inc. | Apparatus and method for forming cup-shaped members |
US6205831B1 (en) * | 1998-10-08 | 2001-03-27 | Rayovac Corporation | Method for making a cathode can from metal strip |
US7726165B2 (en) * | 2006-05-16 | 2010-06-01 | Alcoa Inc. | Manufacturing process to produce a necked container |
Also Published As
Publication number | Publication date |
---|---|
CN101869938A (en) | 2010-10-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HON HAI PRECISION INDUSTRY CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ZENG, QING-HE;ZENG, YONG;LIN, CHENG-HUNG;REEL/FRAME:023048/0023 Effective date: 20090730 Owner name: HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ZENG, QING-HE;ZENG, YONG;LIN, CHENG-HUNG;REEL/FRAME:023048/0023 Effective date: 20090730 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |