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
  • B21D22/02—Stamping using rigid devices or tools
• • 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
  • B21D22/20—Deep-drawing
  • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
• • 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
  • B21D22/20—Deep-drawing
  • B21D22/30—Deep-drawing to finish articles formed by deep-drawing
• • 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
  • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
  • B21D24/16—Additional equipment in association with the tools, e.g. for shearing, for trimming

Definitions

• the invention relates to a method for producing flangeless drawn parts from a plane and / or
• Drawing die a hold-down and a drawing die, wherein the drawing die has at least one support area and at least one Zargen Suite, between which Einlaufrundungen are provided and the board is cut during the drawing process.
• the concerns the concerns: the concerns: the concerns:
• Invention an apparatus for producing flangeless drawn parts from a flat and / or preformed metal board with a drawing punch, a hold-down, a drawing die with at least one support area, at least one Zargen Suite and Einlaufrunditch which are provided between support area and Zargen Scene.
• the object of the present invention is to provide a method and an apparatus for producing flangeless drawn parts, with which process parts in a press stroke flangeless drawn parts can be produced by drawing and trimming and still have a clean trimming.
• the board is cut in the support area and not in the area of the inlet curves or the drawing edge. This ensures that the
• Cutting direction and the direction of movement of the material of the board can be substantially perpendicular to each other.
• the board is not immediately solidified by the trimming, so that it comes to a formation of a clean cut edge.
• By retracting the drawing punch in the drawing die of remaining in the support area part of the board is completely drawn into the frame area and a drawn part without flange with a clean cut edge produced in a press stroke.
• the inventive method is characterized in particular by a single
• the trimming is carried out in the transition region between the support area and the drawing radius.
• Procedure is the hold-down during the cutting of the board in contact with the separated area of the board and so can be used to control the cut of the board
• the hold-down can ensure that the material flow is precisely controlled during the cutting process in the support area.
• a semifinished product can be clamped and stretched wrinkle-free when using a wide hold-down and a support area.
• Method according to the invention can be carried out by trimming the board using a first cutting edge of the drawing punch and a recess provided in the contact area of the drawing die.
• Cutting punch arranged cutting edge makes it possible to dispense with additional measures, such as an additional cutting punch and a device for controlling the movement of the same.
• the method can be carried out more cost-effectively due to the simplification of the device.
• the recess in the drawing die is used to the
• the board is calibrated after trimming in the drawing die by reaching the end position of the drawing punch using an upset stamper arranged in the drawing punch. Deep drawing, Pruning and calibrating are thus done in a single press stroke in the same fixture.
• the method according to the invention can be further improved by using a drawing punch which provides the first and / or the second cutting edge via an exchangeable insert in the drawing die and optionally a drawing die is used, which the
• Cutting edge and the recess in the support area of the board are exposed to increased wear due to the cutting operations. If these are designed as inserts, which are interchangeable, the wear can be taken into account and in the necessary case the appropriate use can be easily replaced. Alternatively, the first cutting edge is at the
• the drawing punch is in this case also with a
• Section line partially material, preferably in the form of webs to stand, i. a broken one
• Cut line whereby the drawn part is at least partially still connected to the trim area and at the same time can be removed from the tool
• the cut area can be separated from the good part.
• the drawing punch has a first cutting edge or rounding, which with a in the
• Supporting region of the drawing die provided recess with a rounding or cutting edge is engaged in such a way that the board is trimmed in the support area during the drawing process before the drawing punch reaches its final position.
• this cutting edge allows that due to the low solidification in the
• Sheet metal is produced a clean cutting edge.
• the flangeless drawn part is provided with a clean cut edge and thus clearly dimensionally accurate despite the process-integrated trimming.
• Tool parts can be used in conventional deep drawing presses, which usually do not have accurate and accurate punch guide and thereby the structure of the tool can be kept simple.
• the drawing punch on a compression shoulder which calibrates the board after insertion of the board in the Zargen Scheme by upsetting at least the Zargenrioss the board when reaching the end position of the drawing punch in the drawing die.
• the upsetting paragraph is designed so that this the
• the upsetting paragraph of the drawing punch is formed as a second cutting edge, wherein the second cutting edge, a trimming of the trimmed board during the
• the second cutting edge allows for additional regrooving of the area of the board drawn into the frame area. Since in this case the severed Schneidbut zen is exposed to any tensile loads, this trimming is done with very high precision. In addition, arise up to the
• FIG. 1 shows, in a schematic sectional view, the method known from the prior art in which, during the drawing process, a blank 2 is deep-drawn with a drawing die 1 and undercut simultaneously in the drawing die 3
• a first cutting edge 4 of the drawing punch 1 is cut.
• the board 2 is usually held by a hold-5.
• the material of the board 2 and the drawing punch 1 is moved in the direction of the arrows shown.
• the cutting edge 4 generates due to the different rapid movement in the region 2a of the board 2, a solidification.
• Fig. 2a shows a first embodiment of a
• Cutting punch 1 ' is formed in the present embodiment such that it the board 2' in
• Support area 2a intersects.
• the trimming can also be done in the transition region between support area and drawing radius. For this purpose, it is engaged with a recess 7 'of the drawing die 3'.
• the hold-down 5 depresses the board 2' during the first cutting operation using the cutting edge 4 'in the support area 2a', so that a controlled trimming of the board 2 'takes place.
• Excess material for example in the floor area 2c, provide, which on reaching the end position of the drawing punch 1 'leads to a calibration of the drawn part.
• the blank 2 'can also be hot formed, i. the board is previously heated to Austenitmaschinestemperatur and warm in the device according to the invention
• Fig. 3a) and 3b) show a further embodiment of a device according to the invention in a schematic sectional view, which differs from the first
• Stitch paragraph 6 '' is designed significantly longer and is provided with a second cutting edge.
• Drawing punch 1 '' in the drawing die 3 '' is first the board 2 '' in the support area using the
• Embodiment of Fig. 2 is executed longer, recut. It falls on the Schneidbut zen 10 '' on. As can be seen with reference to FIG. 3b), the cutting slug 10 "is not under tension, so that a clean separation of the cutting slug 10" is made possible. This can ensure a very good cut quality.
• the board 2 '' only slightly retracted into the drawing die 3 '' after the trimming, so that a particularly high dimensional accuracy of the flangeless drawn part is made possible.
• Direction support area is shifted, ie opposite to the drawing radius and / or in which a locally varying in height support area is used. This allows the feeder to be controlled or adjusted, corrected or

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Shaping Metal By Deep-Drawing, Or The Like (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=45999841

Family Applications (1)

Country Status (6)

Families Citing this family (13)

Citations (9)

Family Cites Families (6)

• 2011
  • 2011-04-29 DE DE102011050001A patent/DE102011050001A1/de not_active Withdrawn
• 2012
  • 2012-04-25 EP EP12716437.4A patent/EP2701861B8/de not_active Not-in-force
  • 2012-04-25 JP JP2014506839A patent/JP5801950B2/ja not_active Expired - Fee Related
  • 2012-04-25 WO PCT/EP2012/057526 patent/WO2012146601A1/de active Application Filing
  • 2012-04-25 CN CN201280021082.7A patent/CN103534046B/zh not_active Expired - Fee Related
• 2013
  • 2013-10-24 US US14/062,462 patent/US20140047891A1/en not_active Abandoned

Patent Citations (9)

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