EP1110641A1 - Dispositif de fluotournage, méthode de fluotournage d' une pièce et système d' échappement ou poulie comprenant une telle pièce - Google Patents

Dispositif de fluotournage, méthode de fluotournage d' une pièce et système d' échappement ou poulie comprenant une telle pièce Download PDF

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Publication number
EP1110641A1
EP1110641A1 EP00204687A EP00204687A EP1110641A1 EP 1110641 A1 EP1110641 A1 EP 1110641A1 EP 00204687 A EP00204687 A EP 00204687A EP 00204687 A EP00204687 A EP 00204687A EP 1110641 A1 EP1110641 A1 EP 1110641A1
Authority
EP
European Patent Office
Prior art keywords
forming
tool
forming tool
workpiece
chuck
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.)
Withdrawn
Application number
EP00204687A
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German (de)
English (en)
Inventor
Johan Massée
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1110641A1 publication Critical patent/EP1110641A1/fr
Withdrawn legal-status Critical Current

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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
    • B21D22/16—Spinning over shaping mandrels or formers

Definitions

  • the invention relates to a forming machine comprising a rotatably drivable gripping device for gripping a workpiece, such as a plate of stock material, which gripping device comprises a first forming tool and a press-on tool for pressing the workpiece in the direction of said first forming tool.
  • a forming machine of this kind is known for example from EP-A-0 125 720.
  • the workpiece is formed by gripping it between the forming tool and a press-on tool or loose head, and subsequently moving a forming roller in a path that corresponds to the shape of the forming tool.
  • a cylindrical, oval-cylindrical or conical body having a flat bottom is for example obtained.
  • the wall being deformed in two or more opposite directions, as is for example the case with parts for exhaust systems or pulleys intended for use in the automobile industry, but also with ashtrays, for example, it is necessary to remove the workpiece and grip it in a second forming machine. Subsequently, a deformation in a second, substantially opposite direction is carried out in said second forming machine.
  • the object of the invention is to provide a forming machine of the kind referred to in the introduction, wherein the above drawbacks are overcome or at least substantially alleviated.
  • the forming machine according to the invention is characterized by a second forming tool, which is mounted at least substantially coaxially round said loose head, which second forming tool can be moved along the press-on tool or the loose head.
  • this second forming tool is located on the side of said workpiece remote from the first forming tool.
  • the workpiece can be deformed by means of a forming roller in the direction of the second forming tool.
  • the workpiece need not be removed thereby, as a result of which the time-consuming removing and renewed gripping of the workpiece is no longer required and, in addition, shifting of the workpiece cannot take place.
  • the forming machine according to the invention can be fitted with a single, preferably symmetrical forming roller, which can be moved to the other side of the workpiece with each subsequent deforming step.
  • the invention furthermore relates to a method for forming a product, wherein a workpiece, for example a plate of stock material, is gripped between a first forming tool and a press-on tool or loose head, and is deformed on the first rotary forming tool by moving a forming roller in a path that corresponds to the shape of the first forming tool.
  • the method is characterized in that subsequently a second forming tool is placed in abutment with the workpiece, on the side remote from the first forming tool, and that the workpiece is deformed on the second rotary forming tool by moving a forming roller in a path that corresponds to the shape of the second forming tool.
  • Figure 1 is a schematic top plan view of a forming machine according to the invention.
  • Figure 2 is a partial schematic sectional view of the gripping device of the forming machine according to Figure 1.
  • Figures 3A - 3F schematically show six steps of a method according to the invention.
  • FIG 1 schematically shows a top plan view of a forming machine 1 according to the invention, which comprises a rotatably drivable gripping device 2.
  • Gripping device 2 comprises a first forming tool or chuck 3 and a press-on tool or loose head 4, which are mounted coaxially in such a manner as to be capable of rotating movement.
  • Chuck 3 can be driven by means of an electric motor (not shown).
  • a workpiece for example a disc-shaped metal plate as shown in figures 2 - 3F, can be gripped between the first forming tool or chuck 3 and the loose head 4 in a manner that is known per se.
  • a metal plate may for example have a thickness ranging from 1 - 12 mm preferably from 1 - 3 mm, and a diameter of 200 - 700 mm, and it can be formed into a desired product by means of a forming roller 5, which is rotatably mounted in a holder 6.
  • Holder 6 is supported in a manner which is known per se by a movable Y-slide or upper slide 7, which is mounted on a movable X-slide or lower slide 8.
  • Lower slide 8 is translatably mounted on machine bed 9 of the forming machine 1. Slides 7, 8 and their respective driving means are accommodated in a housing. Since these parts are not essential for the present invention, reference is made to the applicant's Dutch patent application no. 1000851 and to European patent application no. 0 125 720 for a more detailed explanation.
  • the forming machine furthermore comprises a control part 10, which includes a control unit, an input device, for example in the form of a keyboard, a display screen and a memory.
  • the shape of chuck 3 is stored in the memory of the control part with a view to forming the metal plate on chuck 3 in the production stage.
  • the path to be followed by forming roller 5 is then determined in the usual manner, taking into account the thickness of the metal plate, for example as disclosed in applicant's Dutch patent application no. 1001675.
  • Figure 2 shows the gripping device 2 of the forming machine 1 in more detail.
  • First chuck 3 is circular in section, with the diameter varying in axial direction.
  • the end 11 of chuck 3 has the smallest diameter, which gradually increases in axial direction, so that a frustoconical shape is obtained. From there the diameter of first chuck 3 then increases in steps and subsequently it remains constant along the remaining length of chuck 3.
  • the loose head 4 which comprises a cylindrical pre-bearing shaft 12 and a conical press-on disc 13.
  • the diameter at the end of press-on disc 13 is identical to the diameter at the end 11 of first chuck 3.
  • Pre-bearing shaft 12 is supported in a first group of bearings 14 and a second group of bearings 15, with said second group of bearings 15 being mounted round a hollow cylindrical part 16, which hollow cylindrical part 16 is mounted on pre-bearing shaft 12 by means of key-ways (not shown).
  • Hollow cylindrical part 16 furthermore comprises a flange 17, to which a second chuck 18 is fixed. When second chuck 18 is connected to the pre-bearing shaft 12 in this manner, there is no need to provide additional bearings for said second chuck.
  • a disc-shaped metal plate 19 After a workpiece, in this case a disc-shaped metal plate 19, has been gripped between first chuck 3 and loose head 4 and has been worked in a first processing step, so that it conforms to the shape of end 11 of first chuck 3, the second chuck 18 is placed in abutment with the deformed disc-shaped metal plate 19.
  • the shape of second chuck 18 is at least partially complementary to the shape of first chuck 3, so that second chuck 18 will be capable of accommodating the end 11 of first chuck 3 and the deformed disc-shaped metal plate 19 and of contributing to the gripping force that is exerted on the metal plate 19.
  • first chuck 3 Mounted round first chuck 3 is a third chuck 20, also in this case by means of key-ways, for example.
  • the shape of third chuck 20 is partially complementary to that of second chuck 18, so that said third chuck 20 will be capable of accommodating part of second chuck 18 and the deformed disc-shaped metal plate 19 and of clamping it against second chuck 18.
  • FIGS 3A - 3F schematically show six steps of a method for forming a product, in this case again a disc-shaped metal plate 21.
  • the gripping device as shown corresponds largely to the gripping device that is shown in figure 2.
  • the present forming machine comprises a holder 26, on which a first forming roller 27 and a second forming roller 28 are rotatably mounted.
  • Holder 26 is symmetrical in shape, and the forming rollers 27, 28 are mounted in mirror symmetry with respect to the plane of symmetry of holder 26. It stands to reason that it is also possible to use one forming roller or for example a tool exchanger fitted with 2 to 5 forming rollers, for example.
  • the first chuck 23 is driven, generally at a number of revolutions ranging between 500 (for plates having a large diameter) and 2400 (for plates having a small diameter), and the loose head 25 is driven by workpiece 21.
  • the first forming roller 27 is placed in abutment with the workpiece at the location of the point of contact of the end 24 of loose head 25, and then it is moved in a path that corresponds to the shape of first chuck 23. After workpiece 21 has taken on the shape of the end 22 of chuck 23, first forming roller 27 is removed from workpiece 21 and holder 26 is moved to the other side or rear side of workpiece 21.
  • a second chuck 29 is placed in abutment with workpiece 21, and second forming roller 28 is moved into contact with the other side of workpiece 21. Then the forming roller 28 is moved in a path that corresponds to the shape of second chuck 29, and after the second deforming step is complete the second forming roller 28 is moved away from workpiece 21 and holder 26 is moved to the other side of workpiece 21 again.
  • a third chuck 30 is moved into contact with the rear side of workpiece 21, whilst the first forming roller 27 is moved into contact with the front side of workpiece 21. Then the first forming roller 27 is moved in a path that corresponds to the shape of third chuck 30. Following this, the workpiece 21 can be removed from the gripping device by moving the second and the third chuck 29, 30 and the loose head 25 away from the workpiece 21.
  • the forming machine and the method according to the present invention make it possible to form a workpiece in two substantially opposite directions without there being a need to remove the workpiece. This makes it possible to reduce the production times and avoid the inaccuracies that may occur when the renewed gripping of the workpiece is necessary.
  • the chucks do not necessarily have to be of circular section.
  • the first chuck to have a circular section
  • the second chuck has an oval outer circumference that corresponds to the outer circumference of the second chuck
  • the outer circumference of the third chuck is circular again.
  • the forming machine and the method according to the invention are for example very suitable for manufacturing shells for use in exhaust systems of e.g. trucks.
  • the gripping device may also be positioned vertically (rotatable about a vertical axis). Such an arrangement facilitates horizontal transport and positioning upon subsequent processing steps of the workpieces, which has significant advantages, in particular in case of mass production.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
EP00204687A 1999-12-21 2000-12-20 Dispositif de fluotournage, méthode de fluotournage d' une pièce et système d' échappement ou poulie comprenant une telle pièce Withdrawn EP1110641A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1013906 1999-12-21
NL1013906A NL1013906C2 (nl) 1999-12-21 1999-12-21 Forceermachine, werkwijze voor het forceren van een product en uitlaatsysteem of poelie omvattende een dergelijk product.

Publications (1)

Publication Number Publication Date
EP1110641A1 true EP1110641A1 (fr) 2001-06-27

Family

ID=19770472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00204687A Withdrawn EP1110641A1 (fr) 1999-12-21 2000-12-20 Dispositif de fluotournage, méthode de fluotournage d' une pièce et système d' échappement ou poulie comprenant une telle pièce

Country Status (4)

Country Link
US (1) US20010015084A1 (fr)
EP (1) EP1110641A1 (fr)
CA (1) CA2329443A1 (fr)
NL (1) NL1013906C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008022715A1 (fr) * 2006-08-24 2008-02-28 Leifeld Metal Spinning Gmbh dispositif et procédé de fabrication d'un corps creux à partir d'une pièce de forme arrondie
CN110640007A (zh) * 2019-09-12 2020-01-03 太原科技大学 一种立卧两用旋压机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016115791A1 (de) * 2016-08-25 2018-03-01 WF-Maschinenbau- und Blechformtechnik GmbH & Co. Kommanditgesellschaft Verfahren zur spanlosen Herstellung eines rotationssymmetrischen Körpers aus einer Blechronde

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624304A (en) * 1948-07-06 1953-01-06 United Aircraft Prod Method of making baking or like pans
FR2648061A1 (fr) * 1989-06-07 1990-12-14 Termoz Ind Procede d'usinage par deformation d'un flan metallique et contre-pointe pour la mise en oeuvre du procede

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624304A (en) * 1948-07-06 1953-01-06 United Aircraft Prod Method of making baking or like pans
FR2648061A1 (fr) * 1989-06-07 1990-12-14 Termoz Ind Procede d'usinage par deformation d'un flan metallique et contre-pointe pour la mise en oeuvre du procede

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008022715A1 (fr) * 2006-08-24 2008-02-28 Leifeld Metal Spinning Gmbh dispositif et procédé de fabrication d'un corps creux à partir d'une pièce de forme arrondie
RU2445181C2 (ru) * 2006-08-24 2012-03-20 Лайфельд Металь Шпиннинг Гмбх Способ и устройство для изготовления полого тела из обрабатываемой детали в виде круглой заготовки
CN101528376B (zh) * 2006-08-24 2012-06-27 利费尔德金属旋压有限责任公司 用于由圆坯形的工件制造空心体的装置和方法
CN110640007A (zh) * 2019-09-12 2020-01-03 太原科技大学 一种立卧两用旋压机

Also Published As

Publication number Publication date
CA2329443A1 (fr) 2001-06-21
NL1013906C2 (nl) 2001-06-25
US20010015084A1 (en) 2001-08-23

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