Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B30—PRESSES
  • B30B—PRESSES IN GENERAL
  • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
  • B30B1/18—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means
• • 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
  • B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
  • B21D24/12—Devices controlling or operating blank holders independently, or in conjunction with dies mechanically

Definitions

• the invention relates to a deep drawing press according to the preamble of patent claim 1.
• Known deep-drawing presses have a closed base frame in which a hydraulic drive cylinder for the press bear and a hydraulic support for the drawing cushion are mounted.
• the respective guides In order to adequately guide the press bear and the die cushion, the respective guides must be designed to be comparatively long in the case of appropriately large strokes, so that known deep-drawing presses have a large overall height. It is common to place part of the overall height in a pit in the machine foundation.
• the hall roof must be opened in order to be able to insert the deep-drawing press into the pit of the machine foundation from above, since the hall doors are usually not sufficiently large are measured.
• a deep-drawing press is also known (DE 43 04 329 AI), whose ram carrying the upper tool is moved by several hydraulic drive elements. This well-known deep drawing press is particularly sensitive to asymmetrical loads, which lead to the upper tool being able to tilt during its stroke.
• the deep-drawing presses which are known to be the object of the invention, on the one hand the overall height is as low as possible, and on the other hand a perfect parallel guidance of the driven press elements is possible over the entire travel path even with an eccentric load attack, the deep-drawing press being comparatively inexpensive to manufacture can be installed in conventional machine halls in the hall floor and on the hall roof without special construction measures and the movement sequence of the movable press parts can be controlled easily and precisely.
• the arrangement of several, non-slip, coupled electric motor drives for a feed system consisting of threaded spindle and spindle nut for both the press bear and the die cushion ensures that the overall height of the deep drawing press is significantly reduced compared to known hydraulic deep drawing presses.
• the feed system consisting of a threaded spindle and a spindle nut, allows the guide surfaces to be arranged between the press bar and the lower part of the press. Due to the design according to the invention, it is no longer necessary to support the drive for the press bear on an area of the machine frame which is rigidly connected to the lower press part. Sufficient guide surfaces, for example in the form of guide columns, between the lower part of the press and the press bar and threaded spindles extending to the top of the press bar in its highest stroke position are sufficient.
• the die cushion can be lowered via a drive or output with a spindle and spindle nuts, and the drive or output of all four spindles is coupled without slippage, special vertical guides are unnecessary for the die cushion.
• the drives and / or drives of both the press bear and the drawing cushion are connected in a slip-free manner via electrical shafts.
• Electric drives or drives have the significant advantage that they can be connected to one another without slip using electrical connections alone, and they also have the advantage that the drive parameters can be controlled very precisely by the program. This creates the possibility to change the press pressure depending on the press travel during the deep-drawing process, as for the best possible deep-drawing result appears necessary.
• Such a program-controlled process can be extremely simple ⁇ be werkstelligt.
• Figure 1 a section through a deep drawing press in ge ⁇ opened state according to level I - I in Fig. 4;
• Figure 2 the section through the deep drawing press in the closed state according to Fig. 1;
• Figure 3 - a plan view in the direction of arrow
• the base plate la On a foundation 17, the base plate la is a Pres ⁇ anchored senunterteils. 1
• the lower press part 1 carries guide columns 3, on which a press bear 2 is guided.
• a drawing die On the press bear 2, a drawing die is clamped as the upper tool part 7a, which with a lower tool part 7b cooperates.
• the lower tool part 7b is clamped with its tool base plate 10 on the press table of the lower press part 1.
• the tool base plate 10 is penetrated by drawing pins 9, which carry a drawing ring 8 on which a drawing plate 11 is available as a blank for a drawing process.
• the drawing pins 9 are guided in guide bores 1c of the lower press part 1 and are supported on a drawing cushion 12.
• Spindle nuts 14 for engagement with threaded spindles 13 are fastened to the die cushion 12.
• the threaded spindles 13 are each driven by an angular gear unit 15 consisting of an angular gear 15b and a drive motor 15a. Between the threaded spindle 13 and the lower press part 1 or its base plate 1 a, a pressure measuring element 16 is provided, according to the signals of which the associated drive motor 15 a is controlled.
• the die cushion 12, the motor-angle gear units 15 and the threaded spindles 4 are arranged in a receiving space 1b within the lower press part 1.
• spindle nuts 5 are also non-rotatably and immovably fastened, into which threaded spindles 4 engage, which are rotatably mounted in the press bar 2.
• a motor-angular gear unit 6 is attached to the top of the press bar 2 for each threaded spindle 4, whose motor 6a drives the threaded spindle 4 by means of the angular gear 6b.
• the motors 6a, the angular gear 6b or the threaded spindles 4 can be coupled to one another by a slip-free connection, so that a one-sided introduction of force into the press bar 2 during Closing the tool 7 can not lead to tilting of the press bear 2.
• the guide columns 3 of the press bear 2 therefore remain largely free of transverse forces.
• the operator shown schematically in average size next to the deep-drawing press, clarifies that the drawing plate 11 can be inserted and removed from the deep-drawing press at shoulder height without parts of the deep-drawing press having to be laid below the level of the foundation. A stage for the operator is also not required.
• a threaded spindle 4 is arranged in the corner areas of the press bear 2, which is driven by a motor-angular gear unit 6 is rotated.
• the drive motors 6a are interconnected by electrical shafts, not shown. As a result, the clamping surfaces of the press bear 2 are guided exactly parallel to their starting position.
• the die cushion 12 is prevented from tilting by four motor angular gear units 15 which are arranged in the corner regions of the die cushion 12 and which are electrically or mechanically connected to one another in a slip-free manner.
• 4 shows the lower tool part 7b without a drawing plate 11.
• a plurality of guide bores 1c are provided above the drawing cushion 12, of which only a few guide bores 1c lying under the drawing ring 8 are occupied by drawing pins 9.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Presses And Accessory Devices Thereof (AREA)
• Press Drives And Press Lines (AREA)
• Shaping Metal By Deep-Drawing, Or The Like (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7867473

Family Applications (1)

Country Status (4)

Cited By (3)

Families Citing this family (22)

Family Cites Families (3)

• 1998
  • 1998-05-12 DE DE19821159A patent/DE19821159A1/de not_active Withdrawn
• 1999
  • 1999-04-27 DE DE59901068T patent/DE59901068D1/de not_active Expired - Lifetime
  • 1999-04-27 AT AT99922131T patent/ATE214982T1/de active
  • 1999-04-27 WO PCT/EP1999/002817 patent/WO1999058265A1/fr active IP Right Grant
  • 1999-04-27 EP EP99922131A patent/EP1082185B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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