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
• Transport system for example, from simple supplied coils (flat roll metal tape) complicated geometries, such as fenders,
• high-speed presses are designed as mechanical presses as shown above.
• crank mechanism is a drive which can transform a rotational movement (from a motor) into a linear movement and finds in the literature as an eccentric drive 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.
• all 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.
• Direct drives and servo presses are characterized by the fact that through the use of, preferably DC motors, via a
• a drive system for a forming machine has become known that shows a direct drive for a drive system of a press.
• the shaft output of the direct drive is still translated via a gear before the driving force on the shaft on a
• 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
• the press can be designed with a short overall 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 with four pressure points (connecting rod or
• the advantages of the invention also show an improved control and regulation quality of the system in this context. Due to the high rigidity of the drive system and the exact adjustable torque and angular position control of the engine, there are no measurable deviation between two crankpins and thus at the connecting rods to a crankshaft. The process data can additionally be recorded immediately. The press points through 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 into 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.
• 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 of the direct drive can be supported in the press head and / or provided with a corresponding torque support. Compared with a conventional direct drive, the engine thus has no own storage and the bearing of the rotor within the stator is determined by the
• the direct drive is placed on the supporting part of the crankshaft, i. it is located between the pressing force receiving main bearings of the mechanical drive.
• the motor is then also between the main carrying
• 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.
• Figure 1 is a schematic view of a mechanical press with a
• Press frame and a press table wherein in the upper part of the press, in the head area, the drive system, consisting of two crank gears each having a crankshaft, a crank pin and a connecting rod operatively connected to a plunger,
• FIG. 2 shows a further embodiment in side view according to FIG. 1, wherein two connecting rods are also arranged on a tappet, these being driven separately from one another via a crank drive, wherein the crankshaft is replaced by a thru axle and carries an eccentric wheel with a motor arranged directly thereon,
• FIG. 3 shows another embodiment of the press drive in
• Figure 4 is a schematic view of a preferred embodiment
• Figure 5 is a side view of Figure 4 showing the storage of
• Figure 6 shows a further preferred embodiment of the crank mechanism with a joint drive
• Figure 7 shows a possible arrangement of the press according to the invention in one
• the press 21 is at least a press frame 9, a table 8 mounted therein and one by means of at least one
• this press 21 is used for incorporation of tools 15 or for the production of workpieces (not shown) by means of at least one manufacturing method in a tool 15, wherein the tool at least one
• crankshaft 1 with at least one crank pin 2 and at least one connecting rod 3 is arranged as the crank drive 12, with at least one direct drive driving directly the crankshaft 1 being provided as the motor 14 for driving the crankshaft 1.
• crank mechanism 12 also called eccentric drive, instead of the
• Connecting rod 3 or between the connecting rod and the crank pin a joint drive or a crank handle or similar intermediate devices may be arranged, usually for lifting height adjustment, from
• crank mechanism 12 is operatively connected thereto, wherein these are in turn arranged operatively connected to the ram 5 on the output side.
• the engine 14 is arranged according to Figure 2 substantially adjacent to a crank pin 2 on the crankshaft 1.
• Embodiment and definition can be a so-called crank disc integrated in or on the engine.
• the stator of the engine is preferably designed such that it assumes the function of the crank disk and guides the crank pin outside the center axis of the crankshaft 1.
• the rotor 10 of the motor 14 can be arranged on the crankshaft, wherein according to FIGS. 2 and 3,
• crank mechanism 12 leads, which is mounted on the axle 27 by means of bearings 29.
• a crank mechanism 12 preferably rotates only the eccentric 26, which as a one-piece machine element
• Eccentric 26 are also designed as a contiguous main bearing 29.
• a holder 30 is provided, which is connected at the top to the press frame 9.
• the motor 14 has as a direct drive usually a stator 4 with a drive winding 23 and a rotor 10 disposed therein with permanent magnets 23 and would then be designed as a permanent magnet motor.
• at least one engine 14 is arranged between the crankpins 2 on at least two crankpins 2 on a crankshaft 1.
• a symmetrical arrangement is preferable in a plurality of motors or crankpins. It can thus be provided that, in the case of several motors 14 and a plurality of crankpins 2, at least two motors 14 are symmetrical to one of the central axes of the
• Press frame and / or one of the central axes of the plunger 5 and / or to the longitudinal center of the crankshaft 1 and / or arrangement of the crank pin 2 on the crankshaft 1 are arranged. 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 preserves the press
• the stator 4 of the motor 14 is arranged with a holder 30 for receiving the reaction torques substantially within the press frame 9 and / or the head region above the up and down plunger 5.
• the stator 4 of the engine 14 may be arranged to the crankshaft 1 and / or the rotor 10 without a bearing.
• the stator 4 is guided coaxially to the crankshaft 1 and / or the rotor via the bearings of the crankshaft.
• the stator 4 of a motor 14 may be arranged on a bearing 31 on the rotor 10 and to compensate for the torques occurring on the stator 4 a
• Torque support 32 with connection to the press frame 9 make sense.
• Figure 4 shows that at two
• each stator 4 of a motor 14 is disposed on a bearing 31 on the rotor 10 and to compensate for the torques occurring at the stators 4 a torque arm 32 with connection to the engine 14 on the adjacent crankshaft first
• the motor 14 and the crank mechanism 12 may be disposed within a support structure formed by the press frame 9, wherein in particular press force of over 200 tons, preferably over 500 tons, more preferably over 800 tons can be effected in such press frame.
• the stroke of the plunger 5 of over 300 m, preferably over 600 mm, more preferably of over 900 mm possible.
• the press 21 for a manufacturing process, at least the primary forming, the separation, the joining, the coating and / or the forming, in particular the
• FIG. 6 shows, instead of a crank mechanism 12, which has a joint drive 33 instead of the connecting rods 3.
• FIG. 7 shows the use of the press 21 as the head press 18 of a press line 17, as an incorporation press for tools 15
• the bearings 24 of the crankshaft 1 in from the
• Press frame 9 removable bearing plates arranged so that an opening can be opened with a mounting diameter in the press frame, the diameter preferably preferably equal to or greater than the diameter of the rotor on the shaft or the largest
• crankshaft 1 divided at least once in the longitudinal axis is arranged in the press, which has, for example, a flange connection, removable bearing journals or a shaft / hub connection.
• the rotor 10 is arranged undetachably on the crankshaft 1.
• a shrink fit, a welded joint, a solder joint, a Reibsch dotress, a bond and / or another inseparable F ⁇ getagen be used.
• a preferred embodiment of the rotor 10 would be grooves and / or

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=42946632

Family Applications (1)

Country Status (8)

Cited By (1)

Families Citing this family (10)

Family Cites Families (20)

• 2009
  • 2009-07-29 DE DE102009035215A patent/DE102009035215A1/de not_active Withdrawn
• 2010
  • 2010-07-27 EP EP10740539A patent/EP2459364A1/de not_active Withdrawn
  • 2010-07-27 RU RU2012107470/02A patent/RU2012107470A/ru not_active Application Discontinuation
  • 2010-07-27 WO PCT/EP2010/004595 patent/WO2011012289A1/de active Application Filing
  • 2010-07-27 BR BR112012002025A patent/BR112012002025A2/pt not_active IP Right Cessation
  • 2010-07-27 CN CN2010800442026A patent/CN102712156A/zh active Pending
  • 2010-07-27 JP JP2012522022A patent/JP2013500164A/ja active Pending
  • 2010-07-27 US US13/386,797 patent/US20120180675A1/en not_active Abandoned

Non-Patent Citations (1)

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