Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
  • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
  • B21K27/02—Feeding devices for rods, wire, or strips
  • B21K27/04—Feeding devices for rods, wire, or strips allowing successive working steps
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/18—Mechanical movements
  • Y10T74/18056—Rotary to or from reciprocating or oscillating
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/18—Mechanical movements
  • Y10T74/18056—Rotary to or from reciprocating or oscillating
  • Y10T74/18288—Cam and lever
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/21—Elements
  • Y10T74/2101—Cams

Definitions

• the present invention relates to a device for generating a lifting and lowering movement for lifting and lowering transverse transport tongs of a forming machine, as defined in the preamble of independent claim 1.
• the device according to the invention can be used both in hot-forming machines and in cold-forming machines.
• the workpieces are often transported from one forming station to the next using transverse transport tongs and the empty transverse transport tongs are then transferred back to the starting position.
• WO 98/14289 it is known, for example, to couple the cross transport tongs to a cross transport pipe via a plier box and to move the cross transport pliers with the cross transport pliers holding the workpieces from the starting position into the release position by moving the cross transport pipe in the longitudinal direction of the pipe.
• the pliers box with the cross transport tongs is lifted by turning the cross transport tube and transferred to the starting position by moving the cross transport tube back in the longitudinal direction of the tube and lowering the pliers box again.
• the lifting of the cross transport tongs during the return transfer serves to avoid the forming tools.
• the transverse transport tongs are raised and lowered by rotating a double lever with a control roller arm and a counter roller arm by means of a control curve and a counter curve, which are attached to a rotatable control shaft and act on the double lever in the opposite direction of rotation.
• a control roller rolling on the control curve and a counter roller rolling on the counter curve are rotatably arranged on the control roller arm.
• the cross transport tongs are raised and lowered again both during transfer from the starting position to the release position and during transfer from the release position to the starting position in order to enable the cross transport tongs to be rotated during the transverse displacement.
• the Raising and lowering is carried out by rotating a double lever having a control roller arm and a counter roller arm by means of a control curve and a counter curve, which act on the double lever in the opposite direction of rotation.
• the control curve and the counter curve do not rotate here, but are moved back and forth.
• a control roller rolling on the control cam is rotatably arranged on the control roller arm and a counter roller rolling on the counter curve is rotatably arranged on the counter roller arm.
• a fixed spring presses the control roller arm with the control roller permanently against the control cam.
• the invention is based on the following object.
• a device for generating a lifting and lowering movement for lifting and lowering cross transport tongs of the type mentioned with which the cross transport tongs can be raised and lowered again in the desired manner, in particular a gentle lowering in the fully lowered position possible and one Over-determination over wide areas as well as vibrations should be avoidable.
• This object is achieved by the device according to the invention as defined in independent claim 1.
• Preferred design variants result from the dependent patent claims.
• the device according to the invention for generating a lifting and lowering movement for lifting and lowering transverse transport tongs of a forming machine is essentially structured as follows: a control curve and a counter curve are attached to a movable cam carrier.
• a rotatably mounted double lever has a control roller arm and a counter roller arm, a control roller rolling on the control cam on the control roller arm and a counter roller rolling on the counter curve on the counter roller arm and the control curve and the counter curve acting on the double lever in the opposite direction of rotation.
• the device also comprises a movable spring element curve, on which a spring element roller arranged on a spring element lever rolls, and a spring element arranged on the spring element lever, which acts on the double lever in the same direction of rotation as the counter roller.
• the lifting and lowering movement can be controlled alternately on the one hand by the control curve and the counter curve and on the other hand by the control curve and the spring element curve.
• a control by the control curve and the spring element curve is particularly in the area of the completely lowered Position of the cross transport pliers attached, on the one hand to ensure an almost speed-free, i.e.
• the spring element curve on the movable cam carrier and the double lever and the spring element lever are advantageously mounted rotatably on a common axis.
• the device can thus be built relatively simply and the spring element does not have to make more travel than necessary.
• the spring element curve and the counter curve have the same curve shape and are designed as a single curve. As a result, the device can be manufactured even more easily and cost-effectively.
• the spring element curve is formed separately from the counter curve.
• the control curve, the counter curve and the spring element curve are preferably shaped in such a way that in the completely lowered position of the transverse transport pliers the spring element roller lies against the spring element curve and the spring element exerts a torque on the double lever which pushes the transverse transport forceps downwards, while the control roller of the control curve and Counter roll are lifted from the G ⁇ genkurve.
• Fig. 1 - a schematic representation of a device according to the invention with a pliers box in the fully lowered position;
• FIG. 2 shows the device from FIG. 1 with the pliers box in a lower lifting position
• Fig. 3 the device of Figure 1 with the Zang ⁇ nkast ⁇ n in a high lifting position.
• Fig. 4 - a first possible way of the pliers box in the forming machine; and Fig. 5 - a second possible way of the tong box in the forming machine.
• FIG. 1 In the illustrated embodiment, a control curve 2, a counter curve 3 and a spring element curve 4 are attached to a movable cam carrier in the form of a control shaft 1 in a rotational test.
• the control shaft 1 is rotatably mounted in the direction of arrow A on the machine body 11 and is driven by a motor, not shown.
• Also attached to the machine body 11 is an axis 7 parallel to the control shaft 1, on which a double lever 5 and a spring element 6 are pivoted.
• the Doppelh ⁇ b ⁇ l 5 comprises a control roller arm 52, a counter roller arm 53 and an output arm 51.
• a control roller 54 is rotatably mounted, which rolls on the cam 2, while a counter roller 55 is rotatably mounted at the free end of the counter roller arm 53, that rolls on the opposite curve 3.
• unrolling is not understood to mean that the corresponding roller is continuously in contact with the associated curve and rolls continuously on it, but that it at least temporarily lies against the curve and then rolls on it.
• the control roller arm 52 and the counter roller arm 53 are arranged such that the control roller 54 and the counter roller 55 are located on different sides of the plane passing through the control shaft 1 and the axis 7. The result of this is that the control curve 2 and the counter curve 3 act on the double lever 5 in the opposite direction of rotation.
• the spring element lever 6 has a spring element roller 62 which can be rotatably mounted and which rolls on the spring element curve 4.
• a spring element 61 is arranged between the spring lever 6 and the output arm 51 of the double lever 5 and is shown here as a spring.
• a bellows cylinder is preferably used; in principle, any other spring elements are conceivable, which, depending on the design of the double lever 5, can also be attached to the counter roller arm 53 or, for example, as tension springs on the control roller arm 52.
• the spring element curve 4 and the spring element 61 act on the double lever 5 in the same direction of rotation as the opposing curve 3.
• the free end of the output arm 51 is connected here via a ball joint 86 to the one end of a coupling rod 81, the other end of which is connected in an articulated manner to a pliers box 82 to which pliers cassettes 83 are attached with transverse transport pliers (not shown).
• the pliers box 82 is fixedly attached to a transverse transport pipe 84 which is rotatably and longitudinally displaceable on the machine body 11. By displacing the transverse transport tube 84 in its longitudinal direction, the tong box 82 and thus the tong cassette 83 can be transversely displaced with the transverse conveying tong, the transverse displacement being controlled and controlled by a coordinated curve by the control curve 2, counter curve 3 and spring element curve 4.
• the tongs box 82 In the completely lowered position of the cross transport tongs shown, the tongs box 82 is supported on a plate 91 of an anvil 9.
• the spring element roller 62 lies on the spring element curve 4, while the control roller 54 and the counter roller 55 are lifted from the control curve 2 and counter curve 3, respectively.
• the spring element 61 presses the output arm 51 of the double lever 5 upwards, so that the coupling rod 81 and the associated end of the pliers box
• control roller 54 enters a recess 22, where it no longer abuts the control curve 2.
• the double lever 5 is rotated back in the direction of rotation opposite to the control shaft 1 until the completely lowered position of the transverse transport tongs is reached, in which only the spring element curve 4 via the spring element 61 is effective from the curves.
• the pliers box 82 is set down on the plate 91 almost without speed.
• the transverse transport pipe 84 and thus the pliers box 82 and the pliers cassettes 83 with the transverse transport tongs are moved in the direction of arrow B. In this way, workpieces can be transported from one forming station to the next using the transverse transport tongs.
• the control roller arm 52 becomes via the control roller 54 pressed outward by a hump 23 of the control cam 2, with the result that the double lever 5 is rotated v / i ⁇ the control shaft 1 in the same direction of rotation. Since the hump 23 is much larger than the hump 21, the double lever 5 is rotated very much and the transverse transport tongs are lifted into their high lifting position. As of a certain point in time during lifting, the counter roller 55 comes to the counter curve 3 and the double lever 5 and thus finally the transverse transport tongs are jointly guided safely and precisely by the control curve 2 and the counter curve 3.
• the hump 23 is rotated away under the control roller 54 and the position shown in FIG. 1 is finally loaned again.
• the double 5 is rotated back in the opposite direction of rotation to the control shaft 1 until the completely lowered position of the transverse transport tongs is reached, in which of the curves only the spring element curve 4 via the spring element 61 is effective, since the counter roller 55 from the G ⁇ g ⁇ n curve 3 at a certain time during and the control roller 54 was lifted off the control curve 2 shortly before the end of the lowering.
• the pliers box 82 is set down on the plate 91 almost without speed.
• the transverse transport tube 84 and thus the tongs box 82 and the tongs cassette 83 with the empty transverse transport tongs are closed in the direction of arrow C. back moved.
• the cross transport tongs thus return to the starting position, where they can grip new workpieces.
• the movement of the pliers box 82 explained in connection with FIGS. 1 to 3 is shown graphically here, the movement taking place in the direction of the drawn arrows.
• the pliers box 82 is in the completely lowered position according to FIG. 1.
• the pliers box 82 is lifted into the lower lifting position according to FIG. 2 and lowered again into the completely lowered position.
• the distance from the pliers box 82 to the plate 91 in the lower housing is relatively small, e.g. 1-3 mm, since it only has to be ensured that the tong box 82 does not rest on the plate 91.
• workpieces are transported by the transverse transport tongs from one forming station to the next and released there by the transverse transport tongs.
• the pliers box 82 is then raised with the transverse transport tongs with simultaneous backward displacement from point Q to point P into the high lifting position according to FIG. 3 and is further lowered into this completely lowered position.
• the distance from the pliers box 82 to the plate 91 in the high housing is relatively large, for example about 50% of the length of the horizontal displacement, since it must be ensured that the transverse transport pliers do not touch the forming tools.
• the pliers box 82 may be sensible not to transport the workpieces in the lower lifting position shown in FIGS. 2 and 4, since, for example, there is a slide at the last forming station for removing the formed workpieces, that is to say with a practically horizontal transverse displacement of the workpieces Cross transport tongs cannot be placed optimally. It is preferable to bring the pliers box 82 with the transverse transport tongs to the point Q from above. In the advantageous movement path shown here, the pliers box 82 therefore moves slowly in the direction of the arrow from the fully lowered position in point P to a medium lifting position and then lowers relatively quickly, preferably about three times as quickly as the lever movement, into the completely lowered position in Point Q.
• the distance from the pliers box 82 to the plate 91 in the middle lifting position is preferably about a third of the distance from the pliers box 82 to the plate 91 in the high lifting position.
• the devices according to the invention for generating a lifting and lowering movement for lifting and lowering transverse transport pliers in the forming machine and for the explained movement vehicles.
• the transfer of the lifting and lowering movement from the double lever 5 to the transverse transport tongs can practically take place in any number of other ways.
• the double lever 5 could act directly on the pliers box 82 and the transverse transport pliers could be fixed directly on the pliers box 82 and not via pliers cassettes 83.
• axes can be provided which do not need to be parallel to one another.
• the axes could e.g. would be arranged at right angles to the transverse transport pipe 84.
• the lifting and lowering movements can, for example, also be on a pliers rocker, which the pliers box with d ⁇ m
• Cross transport drive carries can be initiated.
• a moveable curve carrier instead of the rotatable control shaft 1 e.g. a rotationally oscillatable control shaft or a linearly oscillatable control slide etc. are provided.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Specific Conveyance Elements (AREA)
• Sheets, Magazines, And Separation Thereof (AREA)
• Load-Engaging Elements For Cranes (AREA)
• Forklifts And Lifting Vehicles (AREA)
• Manipulator (AREA)
• Intermediate Stations On Conveyors (AREA)
• Special Conveying (AREA)
• Wire Processing (AREA)
• Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
• Forging (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=4209804

Family Applications (1)

Country Status (14)

Cited By (1)

Families Citing this family (8)

Family Cites Families (11)

• 2000
  • 2000-06-30 EP EP00938434A patent/EP1200213B1/fr not_active Expired - Lifetime
  • 2000-06-30 AU AU53845/00A patent/AU5384500A/en not_active Abandoned
  • 2000-06-30 CN CNB008108722A patent/CN1211171C/zh not_active Expired - Fee Related
  • 2000-06-30 CZ CZ20014557A patent/CZ296735B6/cs not_active IP Right Cessation
  • 2000-06-30 AT AT00938434T patent/ATE233623T1/de not_active IP Right Cessation
  • 2000-06-30 ES ES00938434T patent/ES2190972T3/es not_active Expired - Lifetime
  • 2000-06-30 WO PCT/CH2000/000353 patent/WO2001008832A1/fr active IP Right Grant
  • 2000-06-30 JP JP2001513541A patent/JP3768881B2/ja not_active Expired - Fee Related
  • 2000-06-30 UA UA2002010746A patent/UA72529C2/uk unknown
  • 2000-06-30 KR KR10-2002-7000448A patent/KR100454451B1/ko not_active IP Right Cessation
  • 2000-06-30 EA EA200200210A patent/EA003289B1/ru not_active IP Right Cessation
  • 2000-06-30 US US10/030,629 patent/US6684723B1/en not_active Expired - Fee Related
  • 2000-06-30 DE DE50001408T patent/DE50001408D1/de not_active Expired - Lifetime
  • 2000-07-14 TW TW089114098A patent/TW483782B/zh not_active IP Right Cessation

Non-Patent Citations (1)

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