WO2010040336A1 - Procédé de moulage par compression - Google Patents

Procédé de moulage par compression Download PDF

Info

Publication number
WO2010040336A1
WO2010040336A1 PCT/DE2009/001372 DE2009001372W WO2010040336A1 WO 2010040336 A1 WO2010040336 A1 WO 2010040336A1 DE 2009001372 W DE2009001372 W DE 2009001372W WO 2010040336 A1 WO2010040336 A1 WO 2010040336A1
Authority
WO
WIPO (PCT)
Prior art keywords
stage
pressing
openings
particular according
pressed
Prior art date
Application number
PCT/DE2009/001372
Other languages
German (de)
English (en)
Inventor
Ekkehard Körner
Original Assignee
Neumayer Tekfor Holding Gmbh
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 Neumayer Tekfor Holding Gmbh filed Critical Neumayer Tekfor Holding Gmbh
Publication of WO2010040336A1 publication Critical patent/WO2010040336A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor

Definitions

  • the invention relates to a pressing method for the production of pressed parts with an area pressed between a punch and a counter punch or a die bearing a die.
  • Pressed parts are produced in a variety of ways. Among other things, the pressing force required and the stability of the pressing tools are limiting for the design of the pressed parts.
  • the pressure curve increases with decreasing material thickness of the pressed part.
  • large pressure forces which require correspondingly large-sized presses, are therefore necessary for the representation of thin bottoms or webs.
  • the pressing tools are subjected to extreme stress.
  • With the existing technology only floors and bridges with limited material thickness can be produced at economically justifiable expense.
  • the object of the invention is therefore to propose a method for the production of pressed parts, which allows lower material thicknesses and / or lower pressing forces. Furthermore, post-processing steps should be avoided and / or pressed parts with the same strength and lower weight can be displayed.
  • the object is achieved by a method for producing pressed parts having at least one area with a material layer predetermined between punch and counter punch. dissolved strength, the material thickness is set in a two-stage process and at least one opening is introduced between the two stages. In this case, in the first stage, a predetermined material thickness can be set. Subsequently, one or more openings are introduced, for example, punched or punched, either with the same tool or in a multi-stage pressing process in a further process stage, for example in a subsequent tool. The number and size of the openings can be provided depending on the desired strength, the material thickness and the size of the pressed part.
  • the area is pressed to the final thickness of the material thickness, wherein the displaced material pressed into the opening or openings and low material thicknesses can be represented by the thus enabled material flow at reduced pressure.
  • the opening or openings are reduced in diameter.
  • the process step can also take place in a follow-on tool of a multi-stage press, for example during the next press stroke.
  • the multi-stage press can be a horizontal multi-stage press.
  • the proposed method is suitable for areas which are designed as floors or webs of a pressed part.
  • By inserting openings in the bottom or web surface a considerable weight saving of the pressed parts can be achieved since the material thickness can be reduced by a large proportion, for example when using a hot pressing method for solid parts, by 40%.
  • the method has proved to be particularly advantageous for the use of closed engraving in which, for example, the area of a pressed part is limited in its circumference by a die.
  • the lateral material flow is bounded transversely to the printing direction by the die, so that only one material reflux, which may optionally be minimal, contrary to the pressure direction is possible.
  • a thin shaping of the material thickness in a bottom or web region between the pressure stamp and the counter-pressure stamp is therefore particularly advantageous when using inserted openings.
  • the second pressing step which sets the final material thickness, can advantageously be carried out as a calibration or calibration step.
  • a travel limit of the tool, a control of the pressing path or the like can form a size for the calibrated implementation of the pressing process in this stage.
  • the process can be carried out as hot, warm or cold forming process, wherein in conventional processes typical material thicknesses of 10 mm for hot-formed solid parts, 6 to 8 mm for semi-hot formed blanks and 4 mm cold-formed blanks at comparable pressing pressures by a readily Undercut two-stage pressing process with openings between the two steps.
  • Figure 1 shows an embodiment of a manufactured by the method
  • FIG. 1 shows a pressing part 1 in the form of two partial sections arranged around the center line 2.
  • the left side of the center line 2 shows the pressing part 1 after performing a first stage of a pressing process in which in a first stroke of a press in a cylindrical blank on both sides recesses 3, 4 were introduced by dipping the press stamp.
  • a transverse and backflow of the raw material is a contour such as a torus 5 and an area 6, which may be in the embodiment shown as the bottom 8 and in other embodiments also a bridge, showing a reasonable material forces under reasonable pressing forces and tool loads 7, for example 10 mm.
  • the right side of the center line 2 shows the pressing part 1 after the introduction of at least one opening 9. It can, for example round or openings of other shapes are provided. Diameter and / or area and the number of openings 9 can be adapted to the required strength and / or the amount of material to be displaced.
  • the surface of the openings is adjusted so that after setting the final material thickness an at least small opening volume remains, so that even in the final phase of the pressing operation, the pressing forces can be kept low.
  • Figure 2 shows to the left of the center line 2, the pressing part 1 corresponding to the right side of Figure 1.
  • the right side shows the pressing part after performing the second stage, in which the bottom 8 is formed to the final material thickness 10.
  • the material displacement takes place in the opening 9 and / or other openings, not shown, so that the pressing pressure in a preferred manner, the pressing pressure of the first stage does not significantly exceed. Due to the material displacement result after completion of the process openings 11 with a smaller diameter or volume. In special form For example, it may be provided that the openings are kept to a minimum or completely closed.
  • the pressing part 1 can be produced in a particularly advantageous manner in a multi-stage press with progressive tools.
  • a first stroke of the press for example, a horizontal multi-stage press
  • a first tool prepress the pressing member corresponding to the left side of Figure 1.
  • the openings 9 corresponding to the right side of FIG. 1 and the left side of FIG. 2 can be represented.
  • the openings 9 are punched or punched.
  • the pressed part is preferably brought to the final dimension of the material thickness 10 after being transported to a further progressive tool in a calibration process.
  • This pressing process represents a process with partial flow of material transverse to the lifting direction, in which the excess material is pressed into the openings 9, which are thereby changed to the openings 11 with a smaller diameter.
  • the openings 11 can fulfill further functions, for example be vent holes or serve for further processing steps, for example in one or more strokes of the press to calibrated openings for receiving pins or as a calibrated execution or openings for the introduction of threads. It is understood that an advantageous pressing process can also have a different sequence of pressing strokes, in which further intermediate steps can be inserted according to the requirements and / or work steps, for example first pressing stroke and representation of the openings in a tool, can be carried out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

L'invention concerne un procédé de fabrication de pièces (1) moulées par compression présentant des zones moulées (8) en tant que bases ou entretoises. Pour réduire la force de compression et réaliser des épaisseurs de matériau faibles, le processus de moulage par compression est réalisé en deux étapes et entre les deux étapes, au moins une ouverture (9) est pratiquée dans la zone, du matériau pouvant être comprimé dans ladite ouverture au cours de la deuxième étape.
PCT/DE2009/001372 2008-10-07 2009-10-02 Procédé de moulage par compression WO2010040336A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008050712.1 2008-10-07
DE200810050712 DE102008050712A1 (de) 2008-10-07 2008-10-07 Pressverfahren

Publications (1)

Publication Number Publication Date
WO2010040336A1 true WO2010040336A1 (fr) 2010-04-15

Family

ID=41694663

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2009/001372 WO2010040336A1 (fr) 2008-10-07 2009-10-02 Procédé de moulage par compression

Country Status (2)

Country Link
DE (1) DE102008050712A1 (fr)
WO (1) WO2010040336A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354689A (en) * 1965-07-13 1967-11-28 Colorado Oil And Gas Corp Metal forming
FR2482883A1 (fr) * 1980-05-21 1981-11-27 Wako Kk Procede de forgeage de precision a matrices closes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354689A (en) * 1965-07-13 1967-11-28 Colorado Oil And Gas Corp Metal forming
FR2482883A1 (fr) * 1980-05-21 1981-11-27 Wako Kk Procede de forgeage de precision a matrices closes

Also Published As

Publication number Publication date
DE102008050712A1 (de) 2010-04-08

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