EP2842649B1 - A method of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts - Google Patents
A method of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts Download PDFInfo
- Publication number
- EP2842649B1 EP2842649B1 EP13461569.9A EP13461569A EP2842649B1 EP 2842649 B1 EP2842649 B1 EP 2842649B1 EP 13461569 A EP13461569 A EP 13461569A EP 2842649 B1 EP2842649 B1 EP 2842649B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- same
- semi
- finished product
- rolls
- formed rolls
- 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.)
- Not-in-force
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling
Definitions
- the subject of the invention is a method of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts.
- From Polish patient application number PL392275 is well known a way of rolling extrusion of hollowed parts, which is based on forming of a semi-finished part in the form of a sleeve or a tube part between three rotating tools. Yet, one of the tools or all tools move additionally in the direction of the semi-finished part axis, putting it into rotation and reducing particular steps of formed multi-stepped shaft.
- a characteristic feature of this process is tools outline representation on the part external surface, in the result of which section reduction and increase of the product wall thickness take place.
- the issue of rolling extrusion process with regulated axis spacing, of stepped axi-symmetrical parts is the fact that the formed semi-finished product in the form of a bar or a tube part is placed in the front rotational holder seat and the seat of back rotational holder, next the front rotational holder and back rotational holder together with semi-finished product move with a translational motion with constant velocity into the workspace, which is made by the same three formed rolls , next the same three formed rolls are put into rotational motion in the same direction and with the same velocity, then revolution motion of the same three formed rolls is activated and the same three formed rolls are brought closer to the semi-finished product, yet, rotary movement trajectories of the same three formed rolls are of spiral shape, next the semi-finished product is affected by the formed rolls working surfaces and the semi-finished product is put into rotary motion with constant velocity in the direction opposite to the direction of rotations of the same three formed rolls, and, at the same time the semi-finished product is squeezed by working surfaces and the necking is formed on the part
- An advantage of the invention is the fact that it allows for metal forming of multi-stepped parts of full and hollowed shafts, due to which mechanical characteristics of such manufactured products improve. Thanks to the application of automatic change of the axles distance during rolling extrusion process of parts the process technological possibilities enlarge in comparison with used so far manufacturing methods.
- the invention gives the opportunity of application of one set of simple rotary tools in the form of rolls for manufacturing of various products, both full and hollowed.
- the invention is universal and allows for forming of parts from all alloys destined for metal forming.
- Fig.1 shows the beginning of the process and tools and semi-finished product placement in the front view
- Fig.2 view from the side of the process and tools at the beginning of rolling extrusion
- Fig.3 isometric view of the process, tools and semi-finished product at the beginning of rolling extrusion
- Fig.4 view from the front of the process and tools and part placement at the end of rolling extrusion
- Fig.5 view of the side of the process and tools at the end of extrusion
- Fig.6 isometric view of the process, tools and forging at the end of rolling extrusion.
- the way of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts is based on that a formed semi-finished product 3 in the form of a bar or tube part is placed in the seat of the front rotary holder 1 and in the seat of the back rotary holder 2 .
- the front rotational holder 1 and back rotational holder 2 together with semi-finished product 3 move with a translational motion with constant velocity V into the workspace.
- the workspace is made by the same three 4a, 4b and t 4c formed rolls.
- the same three 4a, 4b and 4c formed rolls are put into rotational motion in the same direction and with the same first velocity n 1 .
- revolution motion of the same three 4a, 4b and 4c formed rolls is activated with the second velocity n 2 and the same three 4a, 4b and 4c formed rolls are brought closer to the semi-finished product 3 .
- Rotary movement trajectories 7a, 7b and 7c of the same three 4a , 4b and 4c formed rolls are of spiral shape.
- the semi-finished product 3 is affected by the 4a , 4b and 4c formed rolls working 4a 1 , 4a 2 , 4b 1 , 4b 2 , 4c 1 and 4c 2 surfaces and the semi-finished product 3 is put into rotary motion with the third constant velocity n 3 in the direction opposite to the direction of rotations of the same three 4a, 4b and 4c formed rolls.
- the semi-finished product 3 is squeezed by working 4a 1 , 4a 2 , 4b 1 , 4b 2 , 4c 1 and 4c 2 surfaces and the necking 5 is formed on the part circumference 6 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Description
- The subject of the invention is a method of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts.
- Until now, there exist and are applied numerous methods of axi-symmetrical stepped forgings manufacturing, full and hollowed, which are used as semi-finished products of stepped shafts, sleeves and others. The most widely applied methods include: die forging on presses and hammers, drawing, forging and piercing, rotary swaging, rotary forging, internal high pressure forming, rolling extrusion in cold, rolling extrusion in cold with deep drilling and cross-wedge rolling. These processes are described in details in the literature by Bartnicki. J, Pater Z. "Cross-wedge processes of hollowed products", ed. Lublin University of Technology, Lublin 2005. As it is given by the authors, the largest products precision is obtained in the drawing processes, however, limits connected with this technology application for manufacturing of hollowed parts are small possibilities within the scope of the obtained elements shapes. The forging technology finds application only in the case of forming of shafts with large dimensions and weight. Yet, piercing is used for thick-walled and short sleeve production. Swaging processes allow for reduction of bars and tubes diameters. Parts formed by means of that method are characterized by large precision, and, at forging on a mandrel, they can possess very accurate cylindrical and conical holes. Another method of hollowed parts manufacturing is hydrostatic extrusion, which allows for forming of products of assumed geometry. In this method, a product is formed under high pressure caused in the element inside. Cold extrusion processes are widely applied in industry for manufacturing of hollowed parts, they form due to extruding by the die hole on mandrel. Recently, numerous ways of forming of hollowed parts basing on cross-wedge rolling and wedge-rolls rolling methods have been worked out. In the cross-wedge rolling and wedge-rolls rolling methods at least one of the forming tools constitutes a flat wedge rolled on a roll, which reduces billet diameter by driving into it, displacing certain metal volume at sides. In the result the product undergoes elongation during forming and the wall thickness in the area of the formed necking lowers. This leads to the product weakening in the area of the rolled step and imposes application of thick-walled billets, which can be formed only in hot conditions Additionally, this method requires usage of complex wedge tools of large dimensions, which results in large implementation costs of the cross-wedge rolling technology.
- From Polish patient application number
PL392275 - From Polish patient application number
PL393242 - From the patent application no
US2003/140674 is known a spinning process, in which freely rotatable rolls are revolved around a rotating workpiece and are radially displaced in order to shape the workpiece. - The issue of rolling extrusion process with regulated axis spacing, of stepped axi-symmetrical parts, is the fact that the formed semi-finished product in the form of a bar or a tube part is placed in the front rotational holder seat and the seat of back rotational holder, next the front rotational holder and back rotational holder together with semi-finished product move with a translational motion with constant velocity into the workspace, which is made by the same three formed rolls , next the same three formed rolls are put into rotational motion in the same direction and with the same velocity, then revolution motion of the same three formed rolls is activated and the same three formed rolls are brought closer to the semi-finished product, yet, rotary movement trajectories of the same three formed rolls are of spiral shape, next the semi-finished product is affected by the formed rolls working surfaces and the semi-finished product is put into rotary motion with constant velocity in the direction opposite to the direction of rotations of the same three formed rolls, and, at the same time the semi-finished product is squeezed by working surfaces and the necking is formed on the part circumference.
- An advantage of the invention is the fact that it allows for metal forming of multi-stepped parts of full and hollowed shafts, due to which mechanical characteristics of such manufactured products improve. Thanks to the application of automatic change of the axles distance during rolling extrusion process of parts the process technological possibilities enlarge in comparison with used so far manufacturing methods. The invention gives the opportunity of application of one set of simple rotary tools in the form of rolls for manufacturing of various products, both full and hollowed. The invention is universal and allows for forming of parts from all alloys destined for metal forming.
- The invention is presented in the example of realization in figure, in which
Fig.1 shows the beginning of the process and tools and semi-finished product placement in the front view,Fig.2 -view from the side of the process and tools at the beginning of rolling extrusion,Fig.3 -isometric view of the process, tools and semi-finished product at the beginning of rolling extrusion,Fig.4 -view from the front of the process and tools and part placement at the end of rolling extrusion,Fig.5 -view of the side of the process and tools at the end of extrusion, yet,Fig.6 -isometric view of the process, tools and forging at the end of rolling extrusion. - The way of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts is based on that a formed
semi-finished product 3 in the form of a bar or tube part is placed in the seat of the frontrotary holder 1 and in the seat of the backrotary holder 2. Next, the frontrotational holder 1 and backrotational holder 2 together withsemi-finished product 3 move with a translational motion with constant velocity V into the workspace. The workspace is made by the same three 4a, 4b andt 4c formed rolls. Next the same three 4a, 4b and 4c formed rolls are put into rotational motion in the same direction and with the same first velocity n 1. Then revolution motion of the same three 4a, 4b and 4c formed rolls is activated with the second velocity n 2 and the same three 4a, 4b and 4c formed rolls are brought closer to thesemi-finished product 3.Rotary movement trajectories semi-finished product 3 is affected by the 4a, 4b and 4c formed rolls working 4a 1, 4a 2, 4b 1, 4b 2, 4c 1 and 4c 2 surfaces and thesemi-finished product 3 is put into rotary motion with the third constant velocity n 3 in the direction opposite to the direction of rotations of the same three 4a, 4b and 4c formed rolls. At the same time thesemi-finished product 3 is squeezed by working 4a 1, 4a 2, 4b 1, 4b 2, 4c 1 and 4c 2 surfaces and thenecking 5 is formed on thepart circumference 6.
Claims (1)
- Method of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts characterized in that a formed semi-finished product (3) in the form of a bar or tube part is placed in the seat of a front rotary holder (1) and in the seat of a back rotary holder (2), next, the front rotational holder (1) and back rotational holder (2) together with semi-finished product (3) move with a translational motion with constant velocity (V) into the workspace, which is made by the same three (4a), (4b) and (4c) formed rolls, next the same three (4a), (4b) and (4c) formed rolls are put into rotational motion in the same direction and with a same first velocity (n 1), then revolution motion of the same three (4a), (4b) and (4c) formed rolls is activated with a second velocity (n 2) and the same three (4a), (4b) and (4c) formed rolls are brought closer to the semi-finished product(3), yet rotary movement trajectories (7a), (7b) and (7c) of the same three (4a), (4b) and (4c) formed rolls are of spiral shape, next the semi-finished product (3) is affected by the (4a), (4b) and(4c) formed rolls working (4a 1), (4a 2), (4b 1), (4b 2),(4c 1 )and (4c 2) surfaces and the semi-finished product (3) is put into rotary motion with a constant third velocity (n 3) in the direction opposite to the direction of rotations of the same three (4a), (4b) and (4c) formed rolls and at the same time the semi-finished product (3) is squeezed by working (4a 1), (4a 2), (4b 1), ( 4b 2), (4c 1) and (4c 2) surfaces and a necking (5) is formed on the part circumference (6).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL404294A PL224268B1 (en) | 2013-06-12 | 2013-06-12 | Method for the rotatry pushing with adjustable wheel base of graded axisymmetric forgings |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2842649A1 EP2842649A1 (en) | 2015-03-04 |
EP2842649B1 true EP2842649B1 (en) | 2016-05-18 |
Family
ID=52106833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13461569.9A Not-in-force EP2842649B1 (en) | 2013-06-12 | 2013-12-30 | A method of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2842649B1 (en) |
PL (1) | PL224268B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3733322A1 (en) | 2019-04-30 | 2020-11-04 | University Of Science And Technology Beijing | Device and method for forming shaft part by two-roller flexible skew rolling |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020132513A1 (en) * | 2020-12-07 | 2022-06-09 | Winkelmann Powertrain Components GmbH & Co. KG. | Process for manufacturing a rotor shaft |
CN114160605B (en) * | 2021-10-28 | 2024-05-31 | 首都航天机械有限公司 | Forming device and method suitable for variable-section pipe |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3144695A1 (en) | 1981-11-06 | 1983-05-19 | Mitsubishi Jukogyo K.K., Tokyo | METHOD FOR ROLLING CAVES |
JPS58110137A (en) | 1981-12-24 | 1983-06-30 | Toshiba Corp | Spinning method |
US20030140674A1 (en) | 2001-04-18 | 2003-07-31 | Yukinori Suzuki | Spindle mechanism |
DE102007041149B3 (en) | 2007-08-30 | 2009-04-02 | Technische Universität Dresden | Method and device for cross rolling stepped hollow shafts or cylindrical hollow parts from a tube |
EP2127775A1 (en) | 2008-05-26 | 2009-12-02 | Repkon Machine and Tool Industry & Trade Ltd. | Method for manufacturing workpieces and spinning machine therefor |
EP2422897A1 (en) | 2010-08-30 | 2012-02-29 | Politechnika Lubelska | Apparatus for rotary compression of hollow parts |
EP2422896A1 (en) | 2010-08-30 | 2012-02-29 | Politechnika Lubelska | Method for rotary compression of hollow parts by cross rolling |
EP2210682B1 (en) | 2009-07-09 | 2012-03-14 | Leifeld Metal Spinning AG | Method and apparatus for spinning |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL219463B1 (en) | 2010-12-13 | 2015-04-30 | Lubelska Polt | Method for forming hollow products by means of rolling-extrusion process |
-
2013
- 2013-06-12 PL PL404294A patent/PL224268B1/en unknown
- 2013-12-30 EP EP13461569.9A patent/EP2842649B1/en not_active Not-in-force
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3144695A1 (en) | 1981-11-06 | 1983-05-19 | Mitsubishi Jukogyo K.K., Tokyo | METHOD FOR ROLLING CAVES |
JPS58110137A (en) | 1981-12-24 | 1983-06-30 | Toshiba Corp | Spinning method |
US20030140674A1 (en) | 2001-04-18 | 2003-07-31 | Yukinori Suzuki | Spindle mechanism |
DE102007041149B3 (en) | 2007-08-30 | 2009-04-02 | Technische Universität Dresden | Method and device for cross rolling stepped hollow shafts or cylindrical hollow parts from a tube |
EP2127775A1 (en) | 2008-05-26 | 2009-12-02 | Repkon Machine and Tool Industry & Trade Ltd. | Method for manufacturing workpieces and spinning machine therefor |
EP2210682B1 (en) | 2009-07-09 | 2012-03-14 | Leifeld Metal Spinning AG | Method and apparatus for spinning |
EP2422897A1 (en) | 2010-08-30 | 2012-02-29 | Politechnika Lubelska | Apparatus for rotary compression of hollow parts |
EP2422896A1 (en) | 2010-08-30 | 2012-02-29 | Politechnika Lubelska | Method for rotary compression of hollow parts by cross rolling |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3733322A1 (en) | 2019-04-30 | 2020-11-04 | University Of Science And Technology Beijing | Device and method for forming shaft part by two-roller flexible skew rolling |
Also Published As
Publication number | Publication date |
---|---|
PL224268B1 (en) | 2016-12-30 |
PL404294A1 (en) | 2014-12-22 |
EP2842649A1 (en) | 2015-03-04 |
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