EP3504014A1 - Method for the chipless production of a rotationally symmetrical body from a circular sheet metal blank - Google Patents
Method for the chipless production of a rotationally symmetrical body from a circular sheet metal blankInfo
- Publication number
- EP3504014A1 EP3504014A1 EP17768004.8A EP17768004A EP3504014A1 EP 3504014 A1 EP3504014 A1 EP 3504014A1 EP 17768004 A EP17768004 A EP 17768004A EP 3504014 A1 EP3504014 A1 EP 3504014A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet metal
- shaped
- metal blank
- pressing
- cup
- 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.)
- Pending
Links
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
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
-
- 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
- B21D51/00—Making hollow objects
- B21D51/02—Making hollow objects characterised by the structure of the objects
- B21D51/04—Making hollow objects characterised by the structure of the objects built-up objects, e.g. objects with rigidly-attached bottom or cover
Definitions
- the invention relates to a method for chipless production of a rotationally symmetrical body from a sheet metal blank, wherein the sheet metal blank formed by pressing or spinning rollers around an internal mandrel to a cup-shaped body and molded by pressing a central Vorsetzer from the bottom of the cup-shaped body outwardly projecting hub-shaped projection becomes .
- Such a method is known from EP 0 725 693 B1.
- This known, long-proven principle method is used to produce a hub having a transmission part.
- a cup-shaped mold is first produced from a sheet metal blank by pressing around an internal mandrel.
- the outer bent edge region of the sheet metal blank is held circumferentially by a clamping tool on the tool, ie. the edge region of the sheet metal blank is fixed, so that emigration during the subsequent pressing process is prevented.
- the thus held in the edge region cup-shaped mold is deformed by pressing a central tool pin to a protruding from the sheet metal cam projection and then the cylindrical projection is opened to receive a coaxial shaft.
- the object of the invention is to improve the known method, in particular to simplify the production and to ensure proper concentricity of the forming areas.
- the method is thus carried out only in a single clamping and the sheet metal blank is held or clamped only in its radial inner region, a circumferential clamping tool and a clamping of the outer edge region is completely eliminated.
- the process is thereby considerably simplified, also an unwanted deformation of the already formed peripheral edge is excluded. It is essential here that, starting from the sheet metal blank, not first the hub and then the cup-shaped region are formed, because otherwise, as has been found, material breaks in the hub region. Since the clamping of the sheet metal blank takes place only in the radial inner region and the blank is deformed exclusively by pressing or flow-forming, a perfect concentricity of all forming areas is guaranteed.
- the method is therefore also suitable for the production of components where it depends on an exact concentricity, z. B. for the production of housings for pressure accumulator. Also, a machining post-processing of the component is not required. It is envisaged that the sheet metal blank is held during pressing to the central presetter only by the central presetter and the inner mandrel. In the hub forming the sheet metal blank is thus held only radially within the hub to be generated.
- the central presetter it may also be sufficient for pressing or spinning through the inner mandrel to form the cup-shaped body that the circular sheet is held only by the central presetter and the inner mandrel.
- the sheet metal blank is held during forming around the inner mandrel of a surrounding the central Vorsetzer outer Vorsetzer, wherein when using such an annular outer Vorsetzers the central Vorsetzer can be moved axially from the contact position on the Blechronde.
- the sheet metal blank is first formed into a cup-shaped preform in a first pressing operation.
- the pot-shaped preform is shaped by spin forming into a cup-shaped end shape and then the hub-shaped projection is formed.
- cup-shaped preform of the hub-shaped projection formed by pressing it can be preferably provided that after formation of the cup-shaped preform of the hub-shaped projection formed by pressing and then the cup-shaped preform is converted by flow forming to a cup-shaped final shape.
- the process can basically be carried out with a flat sheet metal blank.
- the sheet metal blank is provided with a bevelled peripheral edge prior to pressing the cup-shaped preform. This can be z. B. done by deep drawing or other suitable forming process.
- the sheet metal blank is provided with a central bore prior to pressing the cup-shaped preform.
- the sheet metal blank is preheated before and / or during pressing or flow-forming, e.g. by induction.
- the pot-shaped end shape can be cylindrical or cone-shaped.
- a central presetter with a surface profiling is used.
- the inner portion of the pushed hub may then have different geometric shapes, for. B. as hexagon socket, Torx profile or the like. This can be realized in a simple manner by appropriate surface profiling of the central presetter.
- Fig. 3 shows the deformation of the sheet metal blank to a cup-shaped final shape by flow-forming and Fig. 4, the Anformung a hub-shaped projection by pressing.
- a generally designated 1 pressing / forming device is shown in the drawings only with elements essential to the invention.
- the pressing / forming device 1 is designed rotationally symmetrical to a longitudinal axis A and has a substantially cylindrical inner mandrel 2.
- a presetter is arranged, which is formed in two parts in the embodiment, namely a central presetter 3 and a surrounding the central presetter 3 outer annular presetter 4. Both the central presetter 3 and the outer presetter 4 are designed to be movable on both sides in the axial direction.
- the pressing / forming device 1 has pressure rollers 5, 6 and 7, wherein distributed over the circumference and a plurality of pressure rollers 5, 6, 7 may be provided.
- the spinning rollers 5, 6, 7 are rotatably arranged relative to the presetting 3 and 4 and the inner mandrel 2 in the circumferential direction relatively, wherein the angular position and the geometric shape of the respective pressure roller 5, 6, 7 are adapted to the respective desired pressure rolling process, d .h. the desired shape and dimension of the rotationally symmetrical body to be produced.
- a sheet metal blank 8 according to FIG. 1 is clamped between the outer prefuser 4 and the end face 2a of the inner mandrel 2, by pressing the outer prefuser 4 in the axial direction against the sheet metal blank 8 and thus the inner mandrel 2.
- the spinning roller 5 or a plurality of spinning rollers 5) relative to the circular sheet 8 and thus the Vorsetzer 4 and the inner mandrel 2 is set in rotational motion, at the same time the spinning roller 8 is moved in the direction of arrow 9.
- a cup-shaped preform 10 is formed from the sheet metal blank 8, which has an axially extending region 10a on the outer circumference.
- the circular sheet-metal 8 is recognizable only in its radial inner area between the inner mandrel 2 and the outer Vorsetzer 4 held or inserted stressed.
- cup-shaped preform 10 is formed into a cup-shaped end 11 by the spinning rollers 6 axially in the direction of arrow 12 with simultaneous relative rotational movement relative to the outer Vorsetzer 4 and the inner mandrel. 2 be moved, this cup-shaped final shape 11 has a substantially longer axially extending peripheral portion I Ib as the cup-shaped preform 10.
- the central presetter 3 is moved axially in the direction of the arrow 13 to the inner mandrel 2 and clamps the cup-shaped end mold 11 in its radial inner region against the inner mandrel 2 a.
- the outer presetter in the direction of arrow 13 is moved axially outward, and indeed so far that one or more spinning rollers 7 can be moved radially inwardly in the direction of arrow 14.
- a hub-shaped projection 15 is integrally formed on the thus completed rotationally symmetrical body 16 to the central presetter 12.
- the sheet metal blank 8 and the resulting cup-shaped preform 10 the cup-shaped final shape 11 and the final product, namely the rotationally symmetric body 16 only in the radial inner region between the inner mandrel 2 and the central presetter 3 and the outer presetter held.
- the process flow may also be modified to the effect that the sequence of FIGS. 3 and 4 is reversed, ie. the formation of the cup-shaped preform 10, the hub-shaped projection 15 is formed in the context of Figure 4 and then in the context of Figure 3, the cup-shaped final form 11th
- a flat sheet metal blank 8 can be used as a starting material for the process also a sheet metal blank, the beveled Peripheral edge is provided. Furthermore, before pressing the cup-shaped preform, the sheet metal blank also be provided with a central bore.
- the sheet metal blank 8 is preheated before and / or during pressing or flow-forming.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Forging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016115791.0A DE102016115791A1 (en) | 2016-08-25 | 2016-08-25 | Method for chipless production of a rotationally symmetrical body from a sheet metal blank |
PCT/EP2017/071312 WO2018037070A1 (en) | 2016-08-25 | 2017-08-24 | Method for the chipless production of a rotationally symmetrical body from a circular sheet metal blank |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3504014A1 true EP3504014A1 (en) | 2019-07-03 |
Family
ID=59887191
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17768004.8A Pending EP3504014A1 (en) | 2016-08-25 | 2017-08-24 | Method for the chipless production of a rotationally symmetrical body from a circular sheet metal blank |
Country Status (8)
Country | Link |
---|---|
US (1) | US11325174B2 (en) |
EP (1) | EP3504014A1 (en) |
KR (1) | KR102343153B1 (en) |
CN (1) | CN109641255B (en) |
CA (1) | CA3033691A1 (en) |
DE (1) | DE102016115791A1 (en) |
MX (1) | MX2019002150A (en) |
WO (1) | WO2018037070A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111604431B (en) * | 2020-06-09 | 2020-12-22 | 泰州市铭方机械有限公司 | Automatic metal spinning equipment |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6358058B2 (en) * | 1980-06-26 | 1988-11-14 | Kuramatorusukii Ind Inst | |
JPS5775225A (en) * | 1980-10-29 | 1982-05-11 | Matsushita Electric Works Ltd | Spinning machine |
FR2559078B1 (en) * | 1984-02-02 | 1988-03-25 | Vallourec | PROCESS FOR PRODUCING AN ANNULAR COLLAR ON THE BOTTOM OF A REVOLUTION CONTAINER |
JPH01228615A (en) * | 1988-03-09 | 1989-09-12 | Mazda Motor Corp | Spinning forming apparatus |
US5428980A (en) * | 1991-08-26 | 1995-07-04 | Iidaka; Tsuguo | Method and apparatus for producing cap for drink bottle |
ES2107817T3 (en) | 1993-12-09 | 1997-12-01 | Wf Maschinenbau Blechformtech | PROCEDURE FOR THE MANUFACTURE WITHOUT CHIP STARTING OF A CUBE OF A GEAR PIECE THAT HAS A CUBE. |
DE19603773A1 (en) | 1996-02-02 | 1996-08-08 | Leifeld Gmbh & Co | Manufacturing method for coupling transmission parts with hubs |
DE19620812B4 (en) * | 1996-05-23 | 2005-07-28 | Leifeld Metal Spinning Gmbh | Method for producing a rotationally symmetrical body |
DE19701565C2 (en) | 1997-01-17 | 2003-09-18 | Leico Werkzeugmaschb Gmbh & Co | Method of manufacturing a gear part |
DE19703947C2 (en) | 1997-02-03 | 2002-12-12 | Leico Werkzeugmaschb Gmbh & Co | Method and device for producing a rotationally symmetrical body |
DE19960582A1 (en) | 1999-12-15 | 2000-08-03 | Leico Werkzeugmaschb Gmbh & Co | Pressure rolling process for transmission components, involving clamping workpiece to tool, rotating it, partly separating sector with pressure roller and deforming |
NL1013906C2 (en) * | 1999-12-21 | 2001-06-25 | Johan Massue | Forcing machine, method of forcing a product and exhaust system or pulley comprising such a product. |
DE102006039656B4 (en) | 2006-08-24 | 2008-12-18 | Leifeld Metal Spinning Gmbh | Device and method for producing a hollow body from a ronde-shaped workpiece |
ATE549106T1 (en) * | 2009-07-09 | 2012-03-15 | Leifeld Metal Spinning Ag | METHOD AND DEVICE FOR STRETCH ROLLING |
CN101966555A (en) * | 2009-07-28 | 2011-02-09 | 上海兴浦旋压车轮有限公司 | Wheel rolling and molding method |
CN103624129A (en) * | 2012-08-23 | 2014-03-12 | 中国航天科技集团公司长征机械厂 | Spinning forming new technology of shell part with inner and outer teeth |
JP6085945B2 (en) * | 2012-10-29 | 2017-03-01 | コニカミノルタ株式会社 | Power supply |
-
2016
- 2016-08-25 DE DE102016115791.0A patent/DE102016115791A1/en active Pending
-
2017
- 2017-08-24 KR KR1020197006217A patent/KR102343153B1/en active IP Right Grant
- 2017-08-24 CA CA3033691A patent/CA3033691A1/en active Pending
- 2017-08-24 EP EP17768004.8A patent/EP3504014A1/en active Pending
- 2017-08-24 WO PCT/EP2017/071312 patent/WO2018037070A1/en unknown
- 2017-08-24 MX MX2019002150A patent/MX2019002150A/en unknown
- 2017-08-24 US US16/326,423 patent/US11325174B2/en active Active
- 2017-08-24 CN CN201780051929.9A patent/CN109641255B/en active Active
Also Published As
Publication number | Publication date |
---|---|
US11325174B2 (en) | 2022-05-10 |
WO2018037070A1 (en) | 2018-03-01 |
DE102016115791A1 (en) | 2018-03-01 |
MX2019002150A (en) | 2019-09-18 |
KR102343153B1 (en) | 2021-12-23 |
CN109641255A (en) | 2019-04-16 |
CN109641255B (en) | 2021-09-14 |
US20210276066A1 (en) | 2021-09-09 |
KR20190039738A (en) | 2019-04-15 |
CA3033691A1 (en) | 2018-03-01 |
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