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
  • B30B1/26—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 cams, eccentrics, or cranks
  • B30B1/266—Drive systems for the cam, eccentric or crank axis

Definitions

• the invention relates to a press with a directly driven crank mechanism according to the preamble of claim 1.
• Manufacturing machines with a reversing ram usually have a motor drive and a crank mechanism, the
• Movement transforms transforms.
• manufacturing equipment is used as presses for forming or cutting workpieces.
• automotive industry required press lines, consisting of several successively arranged presses and associated
• high-speed presses are designed as mechanical presses as shown above.
• crank mechanism is, according to the invention, a drive, the one
• Rotational movement (from a motor) can transform into a linear movement and found in the literature as eccentric or
• Thrust crank drive or the like precipitated.
• the main task of the crank mechanism is to convert a rotational movement into a translational movement, using an eccentric or, as will be the case, a crankshaft.
• On the crankshaft there is an eccentric bearing, which is mounted outside the axis of rotation of the crankshaft, or in the further crankpin, on which a thrust linkage, referred to as the connecting rod, is usually arranged.
• the power flow of the drive can from the smallest possible denominator of the crank mechanism, a crankshaft and a crank pin, to a plunger over several stations such as cranks, joint drives, u. a. or just a connecting rod.
• press frame for the supporting frame of the press.
• press frames are included in their possible embodiments thereof, such as built press frame of several items (top crosshead and bottom, side stand) as well as press frame in window frame construction or Wegankerbauweise.
• Direct drives and servo presses are characterized by the fact that through the use of, preferably DC motors, via a
• Gear or crank gears if they are available.
• crankshaft and finally can be transferred to a crank pin.
• Press head is arranged.
• the engine is usually for a clutch or by directly attaching to the main drive shaft
• the object of the invention is to provide a press in which the drive-side forces of the direct drive with much less
• At least one motor is arranged between the connecting rods when at least one motor is arranged within a press with at least two connecting rods on at least one crankshaft.
• the press can be made with a short length, which is particularly advantageous for servo presses in press lines for the production of large body parts.
• the presses must be close together. The shorter the distance, the faster the transfer times.
• Large presses are usually executed with an even number of two, four .... pressure points (connecting rod or joint gear connections) on the ram.
• the distances transversely and longitudinally between the pressure points respectively the connecting rods can not be chosen arbitrarily, but must after Issues to be selected with regard to reducing the ram deflection.
• the secure acceptance of off-center forces, especially in asymmetrical tool or workpiece geometries, is crucial for the arrangement of the contact points of the connecting rods on the plunger of the press.
• the length of the press head mostly in
• Passage direction is determined by the connecting rod distance and the
• Direct drive no additional mechanical transmission links (e.g., gear stages).
• the parameters measured on the motor such as speed, torque and angular position, can be converted without errors in ram speed, pressing force and ram position. Falsifications due to frictional losses or torsion, backlash etc. are excellently eliminated.
• Permanent magnet motors especially at a high drive power, have a fairly high noise level.
• Noise emissions are easily reduced, e.g. by closing the press head at the top and bottom. Also, the overall efficiency of the press improves significantly, as much less unused forces by the twist or the
• Torque absorption in the bearings occur in a flying bearing of the engine.
• the stator the direct drive supported in the press head and / or provided with a corresponding torque arm.
• the engine thus has no own storage and the bearing of the rotor within the stator is characterized by the
• Support structures (at least two press frames of the press) and
• the connecting rods or, in the case of joint drives, the pivoting levers leading to the connecting rod can either be located on the left and right of the engine and thus between the engine and the main bearing (support structure of the press head) or on one side between the engine and one of the main bearings.
• FIG 2 shows the same embodiment in side view of Figure 1, with
• Figure 3 shows another possible embodiment with four driven
• crank mechanisms Connecting rods in turn, two crank mechanisms are arranged one behind the other and
• the press 21 is at least a press frame 9, a press table mounted therein 8 and a driven by at least one crank 12 plunger 5.
• this press 21 for incorporation of tools 15 or for the production of workpieces (not shown) by means of at least a manufacturing method used in a tool 15, wherein the tool at least one Tool upper part 6 on the plunger 5 and a lower tool part 7 on the press table 8 consists.
• a crank mechanism 12 at least one crankshaft 1 is arranged with at least one crank pin 2 and at least one connecting rod 3, wherein at least one directly the crankshaft 1 driving and mounted in a holder 18 direct drive is provided as a motor 14 for driving the crankshaft 1.
• a hinge drive or a crank or similar intermediate devices may be arranged, which are usually for
• Lift height adjustment for safety reasons or to adjust the sinusoid of the movement of the ram are used.
• both drives are arranged between the connecting rods here. This also results in particular advantages in the routing of the motors 14, which are effectively separated kinematically from each other by a stored in the press frame 9 intermediate storage 20.
• the motors 14 which are effectively separated kinematically from each other by a stored in the press frame 9 intermediate storage 20.
• Crankshafts be executed. This does not necessarily have to be arranged within the intermediate storage 20.
• Press frame 9 are arranged and have a bearing cap 16.
• Figure 4 are two representations of possible forced couplings for a parallel operation of the plunger in Top view for the examples of Figure 3 (left) and Figures 1 and 2 (right).
• the drives or the motors 14 are at least partially, but particularly preferably completely, between the
• the engine 14 is disposed substantially adjacent, at least adjacent to or preferably integral with a crankpin 2 on the crankshaft 1.
• a so-called crank disk can be integrated within or on the engine.
• the stator 4 of the motor 14 is preferably designed such that it assumes the function of the crank disk and guides the crank pin 2 outside the center axis of the crankshaft 1.
• the motor 14 may be a direct drive a stator 4 with a drive winding 23 and a rotor 10 disposed therein with permanent magnets 22 and would then be designed as a permanent magnet motor.
• the motor 14 may be a direct drive a stator 4 with a drive winding 23 and a rotor 10 disposed therein with permanent magnets 22 and would then be designed as a permanent magnet motor.
• At least two crankpins 2 on a crankshaft 1 at least one motor 14 may be arranged between the crankpins 2.
• a symmetrical arrangement within the press 21 or the crankshafts 1 is to be preferred.
• crank pin 2 With several motors 14 and a plurality of crank pin 2, at least two motors 14 symmetrical to one of the central axes of the press frame 9 and / or one of the central axes of the plunger 5 and / or the longitudinal center of the crankshaft 1 and / or the arrangement of Crankpin 2 are arranged on the crankshaft 1. It would also be advantageous if the rotor 10 of the motor 14 and the crankshaft 1 and / or the crank pin 2 consist of a one-piece machine element. Also, in the crank mechanism 12, a height adjustment for the stroke of the plunger 5 may be arranged. An overload protection 11 should protect the press from major damage in the event of an accident and decouple the connecting rods 3 from the plunger 5 in the event of damage.
• stator 4 of a motor 14 may be disposed on a bearing on the rotor 10 and to compensate for the torques occurring on the stator 4, a torque arm with connection to the press frame 9 appear reasonable.
• each stator 4 of a motor 14 could be arranged on a bearing on the rotor 10 and, to compensate for the occurring torques on the stators 4, a torque support with connection to the motor 14 on the adjacent crankshaft 1 arranged a mutual support of the torques allows. This has particular advantages in terms of vibration transmission to the press frame 9. As shown, the engine 14 and the
• Support structure may be arranged, which is preferably designed for a pressing force of over 200 tons, preferably over 500 tons, more preferably of over 800 tons.
• the stroke of the plunger 5 of over 300 m, preferably over 600 mm, more preferably of over 900 mm possible.
• the bearings 17 of the crankshaft 1 in from the
• the rotor 10 is on the
• Crankshaft 1 arranged inextricably.
• a shrink fit, a welded joint, a solder joint, a friction welded joint, a bond and / or another inseparable joint can be used.
• the rotor 10 would be grooves and / or recesses for receiving the permanent magnet 22. These should be used only after the completion of the one-piece machine element therein.
• at least one motor 14 should be arranged as a direct drive between the connecting rods 3.
• Projection of the two axes of the crankshafts 1 in an axis at least one motor 14 is arranged as a direct drive between the connecting rods 3.
• a coaxial projection is meant that the two coaxially arranged axes of the spaced crankshafts are displaced parallel to each other until they lie in one axis. In that regard, it can also be seen here when a direct drive "between" two crankshafts is arranged, even if these crankshafts are not in one piece.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Press Drives And Press Lines (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (8)

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Citations (2)

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• 2009
  • 2009-11-04 DE DE102009051876A patent/DE102009051876A1/de not_active Withdrawn
• 2010
  • 2010-10-30 WO PCT/EP2010/006647 patent/WO2011054485A1/de active Application Filing
  • 2010-10-30 BR BR112012010310A patent/BR112012010310A2/pt not_active IP Right Cessation
  • 2010-10-30 JP JP2012537318A patent/JP2013509998A/ja active Pending
  • 2010-10-30 CN CN2010800504963A patent/CN102712157A/zh active Pending
  • 2010-10-30 US US13/505,830 patent/US20120266766A1/en not_active Abandoned
  • 2010-10-30 RU RU2012122789/02A patent/RU2012122789A/ru not_active Application Discontinuation
  • 2010-10-30 EP EP10781420A patent/EP2496408A1/de not_active Withdrawn

Patent Citations (2)

Non-Patent Citations (1)

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