EP1344584A1 - Outil de formage et procédé de formage sans enlèvement de matière - Google Patents

Outil de formage et procédé de formage sans enlèvement de matière Download PDF

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Publication number
EP1344584A1
EP1344584A1 EP02005551A EP02005551A EP1344584A1 EP 1344584 A1 EP1344584 A1 EP 1344584A1 EP 02005551 A EP02005551 A EP 02005551A EP 02005551 A EP02005551 A EP 02005551A EP 1344584 A1 EP1344584 A1 EP 1344584A1
Authority
EP
European Patent Office
Prior art keywords
forming
forming tool
base body
section
workpiece
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
Application number
EP02005551A
Other languages
German (de)
English (en)
Other versions
EP1344584B1 (fr
Inventor
Bernhard Rolf
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.)
Leifeld Metal Spinning GmbH
Original Assignee
Leico GmbH and Co Werkzeugmaschinenbau
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 Leico GmbH and Co Werkzeugmaschinenbau filed Critical Leico GmbH and Co Werkzeugmaschinenbau
Priority to EP20020005551 priority Critical patent/EP1344584B1/fr
Priority to DE2002501724 priority patent/DE50201724D1/de
Publication of EP1344584A1 publication Critical patent/EP1344584A1/fr
Application granted granted Critical
Publication of EP1344584B1 publication Critical patent/EP1344584B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates on the one hand to a forming tool Chipless forming of rotating workpieces, especially for Spinning machines and spinning rolling machines, with a forming section, which when forming on the rotating workpiece is applied.
  • the invention relates to a method for chipless forming, in which a workpiece is rotating is displaced and by means of at least one forming tool is formed without cutting.
  • Such forming tools and processes are used in manufacturing various metal parts on spinning machines, spinning rolling machines, Projection machines, pulling machines or other machines used on which non-cutting forming be carried out on rotating workpieces.
  • Deliverable forming tools are usually either rotating forming rollers or stationary forming steels used. According to the speed of rotation of the workpiece and depending on the infeed speed of the forming tool and the applied forming forces the respective forming tool is subject to considerable stress exposed. These mechanical, thermal and Tribological stresses lead to tool wear and set an increase in forming speed and thus a desired reduction in production time Limits.
  • the invention has for its object to provide a forming tool and a method for non-cutting forming, which take into account the ever increasing requirements with regard to reducing forming times and increasing tool life.
  • the forming tool according to the invention is characterized in that that at least the forming section is a ceramic material having.
  • a ceramic material clearly grants one higher temperature resistance with the same or even greater hardness.
  • the forming section can be made entirely of ceramic manufactured or provided with a ceramic coating his. This means that even at high mold temperatures achieved great wear resistance, so overall higher forming speeds and larger forming forces constant or even improved tool life compared to conventional metal forming tools can be achieved. Initial attempts have shown that the forming speed compared to previous metallic Forming tools can be increased several times.
  • the forming tools according to the invention are not only the deliverable forming tools but also the opposite to understand forming tools that are stationary on the workpiece, like a chuck. Even with these forming tools, against which the loaded workpiece is tight is a Ceramic material to improve the temperature resistance and the surface hardness advantageous.
  • the forming tool can be complete or be largely made of a ceramic material.
  • the forming section attached to a base body made of a metal is.
  • the metallic base which is used for forming does not come into contact with the rotating workpiece easy to manufacture in a conventional manner and grants one high strength under dynamic stress.
  • the ceramic material coming into contact with the workpiece manufactured or with a ceramic coating provided so that this area is at risk of wear high mechanical, thermal and tribological strength is ensured.
  • This needs-based, economical use of the ceramic material becomes an inexpensive Production of the forming tool possible, which even compared to the manufacture of forming tools hardened or tempered tool steels more cost-effectively can be.
  • the forming tool can be designed with any desired shape become. According to the invention there is a special one versatile forming tool in that this is designed as a forming roller and that the forming section is a ring body, which is made of the ceramic material is made.
  • the forming roller can have any outside contour have and as spinning roller, spinning roller, profiling roller, Projecting role, pull-in role, etc. or as a forming roll with a compression heel for molding Hubs be formed.
  • the ring body made of the ceramic material detachably on one Roller body is stored. In this way, the Ring body simply replaced when wear occurs become.
  • An alternative embodiment of the forming tool according to the invention is that this is a forming rod is formed and that the forming section is a forming block which is made of the ceramic material.
  • forming bars are made by rotating Workpiece not set in rotation itself. hereby result from the shaping by means of shaping bars much higher friction effects. This is when performing so-called pressure welding process desired, at which, for example, pipe ends are compressed into fluid-tight floors be in the central pole zone for one fluid-tight seal must come to a weld.
  • pressure welding process desired at which, for example, pipe ends are compressed into fluid-tight floors be in the central pole zone for one fluid-tight seal must come to a weld.
  • the use of the forming tools according to the invention with ceramic material particularly advantageous because of the very high frictional heat and therefore fast and reliable pressure welding with a long tool life.
  • the forming block detachable from the ceramic material on a rod base body is stored. A quick replacement of the forming block when the geometry of the workpiece changes or when tool wear occurs ensured.
  • the forming section on the Base body with at least one holding element a certain game is positively attached.
  • This Game is taking into account the different thermal expansion of the metallic base body compared to the ceramic Forming section selected, which is basically has less thermal expansion than a metal.
  • the holder must be ceramic-compatible, the ceramic forming section being as stress-free as possible is held on the base body in order to crack the to prevent relatively brittle ceramic material.
  • the forming section has at least one stop surface, which bears on at least one contact surface on the base body, and that the at least one stop surface and the at least one contact surface arranged and designed in this way are that the forming forces become essential Part are transferable as compressive forces.
  • the ceramic forming section largely remains free of tensile forces and bending loads because a high strength of the ceramic forming section everything is given with pressure forces.
  • the object of the invention is characterized in that that one of the previously described in the non-cutting forming process Forming tools is used. Resulting from this the advantages already mentioned in terms of high Forming speeds with long tool life.
  • An embodiment according to the invention is that compared to the use of metallic forming tools an increased forming speed is set. This allows a reduction in production times and thus highly economical production.
  • the method according to the invention can be used as one Cold forming can be carried out. With cold forming the temperature of the workpiece remains below the recrystallization temperature of the metallic material so that work hardening occurs in the workpiece.
  • the workpiece is heated up to the forging temperature.
  • Forming tool with its high temperature resistance and long tool life are particularly advantageous.
  • the workpiece can be separated by a separate heater or exclusively by the frictional heat at Delivery of the forming tool are heated. At this The workpiece is carried out at least in some areas heated above the recrystallization temperature, so that hot forming can take place.
  • a pressure welding is carried out.
  • a block-shaped forming tool is drawn in radially and the workpiece reaches such a high temperature that there is a weld at least in the polar zone and thus a gas-tight seal of the floor comes.
  • high-pressure gas cylinders or other pressure vessels such as gas cartridges for airbag systems, are manufactured economically.
  • a forming roll 10 according to the invention, as exemplified 1 includes a metallic, annular one Base body 20. On the outside is an as Formed section 12 formed annular body. The Forming section 12 comes along during the forming process in contact with the rotating workpiece to be formed. For this is the outer circumference of the forming section 12 with an inlet slope 13a and an outlet slope 13b.
  • the base body 20 and the shaping section 12 are essentially rotationally symmetrical to a roller axis 18 educated.
  • the forming section 12 is in this embodiment made entirely from a ceramic material.
  • the ceramic material is preferably a SiN ceramic, which for high mechanical, thermal and tribological loads is designed. For a long tool life a tension-free mounting of the ceramic forming section 12 on the metallic base body 20 of Importance.
  • the ring-shaped Forming section 12 has a shoulder 11 on its inside whose two end faces act as a stop surface 14a, 14b serve.
  • the first stop surface 14a lies on one first contact surface 24a of the base body 20, while the second stop surface 14b on a contact surface 24b Holding element 22 abuts, which the forming section 12th with its shoulder 11 in a form-fitting manner on the base body 20 holds.
  • the base body 20 has a corresponding one Recess for the annular holding element 22, which clamped against the base body 20 by means of several screws 17 becomes.
  • To avoid strain stresses in a different temperature expansion during processing forms the inner diameter of the annular forming section 12 with the outer diameter of the associated Area of the base body 20 a clearance fit.
  • the ceramic one Forming section 12 has a groove on one end face thereof 15, in which a pin 16 engages in the assembled state.
  • the pin 16 in turn is fixed in a corresponding Anchored bore of the base body 20. This arrangement can be used for easy positioning of the ceramic Forming section 12 on the base body 20 and as an additional driver element for the transmission of torques serve.
  • the forming rod 40 comprises one metallic base body 50, on which a block-shaped, ceramic forming section 42 by means of a plate-shaped Holding element 52 and a schematically indicated Screw 57 is removably attached.
  • the block-shaped forming section 42 has approximately perpendicular to each other Stop surfaces 44a and 44b.
  • the first, upper stop surface 44a is due to a correspondingly trained Contact surface 54a of the holding member 52 while the vertically directed, second stop surface 44b of the Forming section 42 on a corresponding, vertical Contact surface 54b of the base body 50 rests.
  • the stop faces 44a, 44b are together with the contact surfaces 54a, 54b arranged and designed so that when the intended Forming forces occurring essentially as compressive forces on the ceramic forming section 42 are transmitted.
  • the thermal Forming section 42 is further configured such that a radial and axial drawing in of a pipe with welding to a gas-tight container bottom is possible.
  • a tubular starting workpiece 5a which in the lower half of Fig. 3a schematically by a Dashed line is displayed on a spindle 60 by means of a holding device 62 clamped. Over the spindle 60 the workpiece 5a rotates about an axis of rotation 64 added. By axially and radially feeding the The previously described forming tool becomes the free end of the workpiece 5a gradually retracted radially while doing so axially shortened, with individual process sections schematically shown in the upper half of Fig. 3 and with 5b Marked are. The workpiece 5a is so far retracted radially so that the retracted workpiece edge in the area of the axis of rotation 64, in the so-called pole zone, touched.
  • the workpiece can be a gas burner 5a specifically heated. So it can be in the polar zone gas-tight welding of a floor of the retracted Workpiece 5c come.
  • the forming tool is process-related in this process very high mechanical, thermal and tribological Exposed to stress. These strains keeps the forming tool according to the invention in a very excellent Stood wise.
  • the invention Forming tool delivered at such a speed that there is a very high frictional heat and thus reliable welding of the workpiece floor is achieved with a significantly reduced heating energy supply. Under certain conditions, even the frictional heat be sufficient for welding. In this case a supplementary heating device 66 is no longer necessary.
  • the manufacturing time is increased by a high forming speed shortened, making it a particularly economical overall Procedure leads.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP20020005551 2002-03-11 2002-03-11 Outil de formage et procédé de formage sans enlèvement de matière Expired - Lifetime EP1344584B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20020005551 EP1344584B1 (fr) 2002-03-11 2002-03-11 Outil de formage et procédé de formage sans enlèvement de matière
DE2002501724 DE50201724D1 (de) 2002-03-11 2002-03-11 Umformwerkzeug und Verfahren zum spanlosen Umformen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20020005551 EP1344584B1 (fr) 2002-03-11 2002-03-11 Outil de formage et procédé de formage sans enlèvement de matière

Publications (2)

Publication Number Publication Date
EP1344584A1 true EP1344584A1 (fr) 2003-09-17
EP1344584B1 EP1344584B1 (fr) 2004-12-08

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Family Applications (1)

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EP20020005551 Expired - Lifetime EP1344584B1 (fr) 2002-03-11 2002-03-11 Outil de formage et procédé de formage sans enlèvement de matière

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EP (1) EP1344584B1 (fr)
DE (1) DE50201724D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019008555A1 (de) * 2019-12-10 2021-06-10 Süddeutsche Gelenkscheibenfabrik Gesellschaft mit beschränkter Haftung & Co. KG. Umformwerkzeug, Umformvorrichtung und Verfahren zum Umformen eines Werkstücks
CN119175303A (zh) * 2024-11-22 2024-12-24 西安博赛旋压科技有限公司 一种大长径比变壁厚复杂曲母线壳体旋压成形方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518491A1 (de) * 1985-05-23 1986-11-27 Leifeld & Co, 4730 Ahlen Verfahren und vorrichtung zur einstellung des formwerkzeuges einer drueckmaschine
EP0335602A1 (fr) * 1988-03-30 1989-10-04 Advanced Composite Materials Corporation Outils en matériau céramique renforcé par whiskers
US5085131A (en) * 1990-10-02 1992-02-04 Prime Tube, Inc. Hydraulic cylinder for automotive steering systems and the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3518491A1 (de) * 1985-05-23 1986-11-27 Leifeld & Co, 4730 Ahlen Verfahren und vorrichtung zur einstellung des formwerkzeuges einer drueckmaschine
EP0335602A1 (fr) * 1988-03-30 1989-10-04 Advanced Composite Materials Corporation Outils en matériau céramique renforcé par whiskers
US5085131A (en) * 1990-10-02 1992-02-04 Prime Tube, Inc. Hydraulic cylinder for automotive steering systems and the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019008555A1 (de) * 2019-12-10 2021-06-10 Süddeutsche Gelenkscheibenfabrik Gesellschaft mit beschränkter Haftung & Co. KG. Umformwerkzeug, Umformvorrichtung und Verfahren zum Umformen eines Werkstücks
CN119175303A (zh) * 2024-11-22 2024-12-24 西安博赛旋压科技有限公司 一种大长径比变壁厚复杂曲母线壳体旋压成形方法

Also Published As

Publication number Publication date
EP1344584B1 (fr) 2004-12-08
DE50201724D1 (de) 2005-01-13

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