EP1702746A1 - Dispositif de déplacement d'outillages et de moules d'une presse - Google Patents

Dispositif de déplacement d'outillages et de moules d'une presse Download PDF

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Publication number
EP1702746A1
EP1702746A1 EP05005841A EP05005841A EP1702746A1 EP 1702746 A1 EP1702746 A1 EP 1702746A1 EP 05005841 A EP05005841 A EP 05005841A EP 05005841 A EP05005841 A EP 05005841A EP 1702746 A1 EP1702746 A1 EP 1702746A1
Authority
EP
European Patent Office
Prior art keywords
bar
slot
rail
bag
press
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05005841A
Other languages
German (de)
English (en)
Inventor
Kenneth Hedin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hedin Lagan AB
Original Assignee
Hedin Lagan AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hedin Lagan AB filed Critical Hedin Lagan AB
Priority to EP05005841A priority Critical patent/EP1702746A1/fr
Priority to US11/376,153 priority patent/US7204793B2/en
Publication of EP1702746A1 publication Critical patent/EP1702746A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/028—Loading or unloading of dies, platens or press rams
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/14—Particular arrangements for handling and holding in place complete dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/085—Accessories for handling work or tools handling of tools

Definitions

  • the present invention relates to a device for moving objects to and from the table of a press, said device comprising a bag located at the bottom of an elongated slot formed in an upper surface of the table, a strip located in the slot on top of the bag, and an elongated bar which is located in the slot on top of the strip, the bar being vertically movable, by means of inflating the bag, from a first position in which an upper surface of the bar is located below the upper surface of the table to a second position in which the upper surface of the bar is located above the upper surface of the table so as to lift an object located on the table, the bar being adapted to slide horizontally in its longitudinal direction on top of the strip.
  • US 4,691,554 describes a die transfer system which is based on vertically movable rails provided with rollers. Each movable rail is provided in an inverted T-slot and comprises an air bag which can be inflated in order to elevate the rollers vertically to a position above the upper surface of the table. Thus it is possible to grip the die tool or mould and, with the application of a force, roll it out of the press, or vice versa.
  • a problem with the die transfer system of US 4,691,554 is, however, that manual force or a special gripping device is required to move the die.
  • a known solution to this problem is to provide, in each of the inverted T-slots of a table, a bar which slides on a strip of metal provided on top of an air bag located at the bottom of the inverted T-slot.
  • the bar is, at one end, connected to a hydraulic cylinder adapted to force the bar in a horizontal direction.
  • the air bag In order to move a die tool from the table the air bag is first inflated. When inflated the air bag lifts the strip, and thus the bar, vertically upwards to lift the die tool or mould a short distance from the surface of the table. The hydraulic cylinder then acts on the end of the bar to drag the bar, and the mould or die tool resting thereon, horizontally out of the press, the bar sliding on the strip.
  • An object of the present invention is to provide a system for moving die tools or moulds in a press, which system requires less floor area than the prior art transfer systems.
  • a device according to the preamble and characterized in the bar being provided with gear teeth, the device further comprising a gear wheel engaging the gear teeth of the bar, a motor being adapted to rotate the gear wheel to move the bar in the horizontal direction along the slot when the bar is in its second position and thus to horizontally move objects resting on the upper surface of the bar.
  • An advantage with this device is that it can be made very compact since the gear wheel is located next to the bar.
  • the system is also well adapted for applications where the object is to be moved a considerable distance since the distance the bar can be moved is not limited by a piston of a hydraulic cylinder or similar device.
  • the system is robust and well suited to fit the tough environment associated with presses.
  • the strip is located below shoulders formed in the slot.
  • the shoulders have the advantage of limiting the movement of the strip in the vertical direction.
  • the upper surface of the bar will have a well-defined height above the upper surface of the table.
  • said slot is an inverted T-slot.
  • An inverted T-slot is a standard machine element often used in tables for presses. The device of the present invention can thus be easily fitted into a standard table for a press. Further the inverted T-slot has a lower portion suitable for housing the bag and the strip and preventing them from moving, in a vertical direction, out of their positions.
  • the gear wheel is covered by a housing.
  • the housing which preferably opens only in the direct of the bar, protects the gear wheel from damage caused by the objects on the table of the press. Further, operators working close to the machine are also protected from injuries caused by the gear wheel.
  • the gear wheel and a vertical shaft, by which the motor is able to rotate the gear wheel are mounted adjacent to a lateral side of the press table.
  • the bar is provided with the gear teeth on at least one lateral side, the gear wheel being adapted to rotate in a substantially horizontal plane.
  • said bag is inflated by means of pressurized air. Inflating with pressurized air provides for a simple control of the force with which the bar lifts the object located on the table.
  • the device further comprises at least one rail unit, the rail unit comprising a rail being vertically movable in a rail slot in the upper surface of the table, said rail slot being parallel with and adjacent to said slot housing said bar, the rail unit further comprising a rail bag located at the bottom of the rail slot, and a number of rollers supported by the rail, the rail being vertically movable, by means of inflating the rail bag, from a first position, in which the rollers are located below the upper surface of the table, to a second position, in which the rollers extend above the upper surface of the table to lift objects located on the table, the rail being adapted to be moved to its second position at the same time as the bar is moved to its second position in order to decrease the pressure of the objects on said bar and to decrease the friction between said bar and said strip.
  • the rail unit provides for assisting the bar in lifting the object/-s from the upper surface of the press table. Thus the friction between the strip and the bar is decreased, which lowers the power needed to move the object/-s
  • a further object of the present invention is to provide a table for a press, which table enables easy moving of die tools and moulds without requiring a lot of floor space.
  • a table comprising at least two elongated slots having inverted T-slot shape and being formed in an upper surface of the table, the table comprising at least one device of the above described type for moving die tools and moulds in and out of the press.
  • Fig. 1a and 1b show a press 1.
  • the press comprises a press table 2, which may also be called a bolster, which is located at the lower part of the press 1.
  • a heavy object 4 is located on the press table 2 .
  • the object 4 is typically a die tool or a mould on which the press 1 has just performed a pressing operation. Due to the weight of the object 4, typically 300 - 10 000 kg it is not easily moved away from the press 1.
  • Adjacent to the press 1 a side table 6 is located.
  • the side table 6 is an example of an intermediate storage place for objects like die tools and moulds.
  • the press is provided with a device 8 for moving the object 4.
  • Fig 2a and 2b show the press 1 after the device 8 has moved the object 4 from the press table 2 to the side table 6.
  • Fig. 3a-c show the device 8 in closer detail.
  • the device 8 comprises a bag 10 located at the bottom 12 of an elongated inverted T-slot 14 formed in an upper surface 16 of the press table 2.
  • the inverted T-slot 14 is preferably a standard Joint Industrial Step T-slot or a T-slot based on a corresponding European or other industrial standard.
  • the inverted T-slot 14 extends over the table 2 and continues over to the side table 6.
  • the bag 10 is an elongated air bag extending along the length of the T-slot 14.
  • the bag 10 could be of a type comprising an inner layer of rubber or plastic and an outer reinforcement.
  • the bag 10 is sealed and at the other end it is fitted to a supply of pressurized air (in Fig. 3a-c the bag 10 is schematically shown in a cross section to illustrate its function more clearly).
  • the bag 10 may be inflated according to similar principles as described in US 4,691,554 .
  • An elongated strip 18 is located in the slot 14 on top of the bag 10.
  • the strip 18 is preferably made of a low friction material, such as plastic material, such as PTFE (also known as Teflon®).
  • the strip 18 is located below shoulders 20, 22 formed in the T-slot 14. The shoulders 20, 22 limits the movement in the vertical direction of the strip 18.
  • the device further comprises an elongated bar 24, which is located in the slot 14 on top of the strip 18.
  • the bar 24 is vertically movable, by means of inflating the bag 10, for example by means of applying pressurized air to it, from a first position in which an upper surface 26 of the bar 24 is located below the upper surface 16 of the table 2, as shown in Fig. 3a-c, to a second position in which the upper surface 26 of the bar 24 is located above the upper surface 16 of the table 2, as shown in Fig. 4a-c.
  • the bar 24 is located in its first position which means that the object 4 rests on the upper surface 16 of the press table 2.
  • the bar 24 is adapted to slide horizontally in its longitudinal direction on top of the strip 18.
  • the strip 18 and the bag 10 extend from the press table 2 to the side table 6 in order to provide a vertically adjustable sliding surface over the whole horizontal distance over which the bar 24 is adapted to move.
  • the bar 24 is provided with gear teeth 28, being straight gear teeth each extending in a direction being normal to the longitudinal direction of the bar 24, on a lateral side 30 of the bar 24.
  • the device 8 further comprises a gear wheel 32 engaging the gear teeth 28 of the bar 24.
  • the gear wheel 32 is adapted to rotate in a horizontal plane and is arranged at a level below the upper surface 16 such that there will always be a gap G between the gear wheel 32 and the object 4.
  • the gap G is 1-10 mm when the bar 24 is in its first position, shown in Fig. 3a-c.
  • the gear teeth 28 of the bar 24 and the gear teeth of the gear wheel 32 have such an extension in the vertical direction that they will engage both when the bar 24 is in its first position, as shown in Fig 3a-c, and when the bar 24 is in its second position, as is shown in Fig. 4a-c.
  • the gear wheel 32 is fixed to a vertical shaft 34, which is connected to a gear box 36.
  • a motor 38 is connected to the gear box 36 to enable rotation of the gear wheel 32.
  • a horizontal shaft 40 is used to forward power to a gear box of a parallel device 8 for to enable a simultaneous rotation of the gear wheel of that device for to obtain a synchronous horizontal movement of the bars of both the respective devices.
  • a rail slot 42 is formed in the upper surface 16.
  • the rail slot 42 is an elongated inverted T-slot of the same type as the slot 14 and is parallel therewith.
  • the rail slot 42 houses a rail unit 44 which comprises a rail 46.
  • the rail unit 44 further comprises a rail bag 48 located at the bottom of the rail slot 42, and a number of rollers 50 supported by the rail 46.
  • the rail 46 is vertically movable, by means of inflating the rail bag 48, from a first position, in which the rollers 50 are located below the upper surface 16 of the table 2 as shown in Fig. 3a-c, to a second position, in which the rollers 50 extend above the upper surface 16 of the table 2, as shown in Fig. 4a-c.
  • both the press table 2 and the side table 6 are provided with rail units 44 of the same type.
  • the gear wheel 32, the shaft 34, the gear box 36 and the motor 38 are fitted in a rack 52 which is fixed to the side table 6 adjacent to a lateral side 54 of the press table 2.
  • This provides a very compact construction since the device 8 does not require any extra space, resulting in that the space requirement around the press table 2 is decided only by the size of the press 1 and of the side table 6.
  • a rack supporting the gear wheel, shaft, gear box and the motor may be fastened directly on the lateral side 54 of the press table 2.
  • the bag 10 and the rail bag 48 are inflated to a suitable pressure. Additionally the bags and rail bags of further devices 8 and rail units 44, the presence of which are indicated in Fig. 3b and 4b, are also inflated. Due to the inflation of the bag 10 the strip 18 forces the bar 24 upwards, to its second position, such that the upper surface 26 of the bar 24 lifts the object 4 from the upper surface 16 of the table 2. As is clearly shown in Fig. 4a the strip 18 abuts the shoulders 20, 22, thus providing a well-defined vertical position for the bar 24. The rail bag 48 lifts the rail 46 such that the rollers 50 will assist in lifting the object 4 from the upper surface 16.
  • the bar 24 and the rollers 50 will thus have the position indicated in Fig. 4a-4c.
  • the motor 38 is started from a remote control station (not shown).
  • the motor 38 makes the gear wheel 32 rotate and thus forces the bar 24, by means of the gear wheel 32 engaging the gear teeth 28, to slide on the strip 18 in a horizontal direction. Since the object 4 rests on the upper surface 26 of the bar 24 it will be moved horizontally together with the bar 24. Thus the object 4 will be moved horizontally from the location shown in Fig. 1a-b to the location shown in Fig. 2a-b. During the movement the object 4 will also slide on the rollers 50 of the rail unit 44, thus decreasing the friction exerted by the bar 24 on the strip 18.
  • the air is allowed to leave the bag 10 and the rail bag 48.
  • the bar 24 will return to its first position indicated in Fig. 3a-c.
  • the rail 46 will return to the position shown in Fig. 3a-c.
  • the gear wheel 32 is activated again and moves the bar 24, now in its first position shown in Fig. 3a-c, horizontally back to its original position at the press table 2.
  • the device 8 is then ready for moving another object 4.
  • the device 8 is also used for moving objects from the side table 6 and to the press table 2.
  • Fig. 5 shows a further embodiment of the invention.
  • a housing 60 is provided over the gear wheels 32 of two adjacent devices 8.
  • the housing 60 protects workers from injuries caused by the gear wheel 32 and protects the gear wheel 32, the shaft 34 and the gear box 36 from damage caused by material from the press 1.
  • Fig. 6 shows a device 108 according to yet another embodiment of the invention.
  • a bar 124 which is seen from above in Fig. 6 is provided with first gear teeth 128 on a first lateral side 130 and second gear teeth 129 on a second lateral side 131, being opposite to said first lateral side 130.
  • a first gear wheel 132 is located adjacent to the first lateral side 130 and engages the first gear teeth 128.
  • a second gear wheel 133 is located adjacent to the second lateral side 131 and engages the second gear teeth 129.
  • the gear wheels 132, 133 are operated simultaneously and cooperate to move the bar 124 in a certain horizontal direction as indicated with arrows in Fig. 6.
  • Fig. 7 shows a still further device 208 according to the invention.
  • a bar 224 which is seen from the side in cross section in Fig. 7, is provided with a number of bar rollers 250.
  • the bar 224 is movable in the horizontal direction by means of a not shown gear wheel engaging gear teeth provided on the bar 224.
  • the bar rollers 250 roll on top of a strip 218 which is located on top of a bag, which is not shown in Fig. 7 but which is similar to the bag 10 shown in Fig. 4a etc.
  • Objects may be lifted on top of an upper surface 226 of the bar 224 in a similar manner as described above.
  • the rollers 250 are located below the upper surface 226 and will thus not be in contact with any objects.
  • the advantage of the embodiment of Fig. 7 is that the friction between the bar 224 and the strip 218 is very low, also when very heavy objects are located on the surface 226.
  • Fig. 8 shows yet another embodiment of the invention in the form of device 308.
  • the device 308 comprises a bar 324, which is seen from the side in cross section in Fig. 8 and which is of the same design as the bar 24 shown in Fig. 4a etc.
  • the bar 324 having an upper surface 326 on which objects could be lifted in a similar manner as described above, rolls on top of a strip 318.
  • the strip 318 is located on top of a bag, not shown in Fig. 8.
  • the strip 318 is provided with a number of rollers 350.
  • the rollers 350 decreases the friction between the bar 324 and the strip 318 so that the bar 324 may slide in the horizontal direction with a lower friction, also in the case very heavy objects are located on top of its upper surface 326.
  • the device 8 for moving objects 4 includes both a bar 24 and a rail unit 44. It will be appreciated that the rail unit 44, although having advantages, in particular when moving very heavy objects, is not necessary for the invention. Thus it is possible to design a device for moving objects with a bar only.
  • the strip 18 and the bar 24 are fitted in an inverted T-slot. It will be appreciated that those parts could be fitted into slots of other shapes, such as U-shape etc., formed in a press table.
  • pressurized air As an inflating medium for the bag 10 and the rail bag 48 pressurized air is often preferred since it is often available near the press 1. It is, however, also possible to use a pressurized fluid, such as oil or water, or another gas for inflating the bag.
  • a pressurized fluid such as oil or water, or another gas for inflating the bag.
  • the bar 24 and the strip 18 should be made of materials providing a sufficient mechanical strength for lifting objects 4 and a low friction.
  • the bar 24 could be made of a plastic, such as PTFE, or a metal such as steel or brass.
  • the strip 18 could be made of a metal or a plastic. It is appreciated that the materials of the bar and the strip are chosen such that a low friction is obtained between them.
  • the housing 60 shown in Fig. 5 could be located so as to be flush with upper surface 16 of the press table 2 and could form an integral part of the press table 2.
EP05005841A 2005-03-17 2005-03-17 Dispositif de déplacement d'outillages et de moules d'une presse Withdrawn EP1702746A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP05005841A EP1702746A1 (fr) 2005-03-17 2005-03-17 Dispositif de déplacement d'outillages et de moules d'une presse
US11/376,153 US7204793B2 (en) 2005-03-17 2006-03-16 Device for moving die tools and moulds in a press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05005841A EP1702746A1 (fr) 2005-03-17 2005-03-17 Dispositif de déplacement d'outillages et de moules d'une presse

Publications (1)

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EP1702746A1 true EP1702746A1 (fr) 2006-09-20

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EP05005841A Withdrawn EP1702746A1 (fr) 2005-03-17 2005-03-17 Dispositif de déplacement d'outillages et de moules d'une presse

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2441534A1 (fr) * 2010-10-18 2012-04-18 Rotobloc-PSP Dispositif de manutention d'une charge notamment d'un outil de presse
CN107061411A (zh) * 2017-05-22 2017-08-18 东莞市巨冈机械工业有限公司 一种内置吹尘气路的电主轴气缸
CN112475175A (zh) * 2020-11-13 2021-03-12 江苏新泰隆管件有限公司 一种智能型高效率热模锻压机机床

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL267880A (fr) * 1900-01-01
US3139676A (en) * 1961-11-22 1964-07-07 Raymond B Grover Die raising and changing device
US4691554A (en) * 1985-06-12 1987-09-08 Murphy William P Die transfer system
US5466207A (en) * 1993-12-20 1995-11-14 Arens; Cornelus G. Die change apparatus for reciprocating press
DE4437085A1 (de) * 1994-10-17 1996-04-25 Kaiser Kg Otto Presse mit einem Pressen- und Konsolentisch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL267880A (fr) * 1900-01-01
US3139676A (en) * 1961-11-22 1964-07-07 Raymond B Grover Die raising and changing device
US4691554A (en) * 1985-06-12 1987-09-08 Murphy William P Die transfer system
US5466207A (en) * 1993-12-20 1995-11-14 Arens; Cornelus G. Die change apparatus for reciprocating press
DE4437085A1 (de) * 1994-10-17 1996-04-25 Kaiser Kg Otto Presse mit einem Pressen- und Konsolentisch

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2441534A1 (fr) * 2010-10-18 2012-04-18 Rotobloc-PSP Dispositif de manutention d'une charge notamment d'un outil de presse
FR2966070A1 (fr) * 2010-10-18 2012-04-20 Rotobloc Psp Dispositif de manutention d'une charge notamment d'un outil de presse
CN107061411A (zh) * 2017-05-22 2017-08-18 东莞市巨冈机械工业有限公司 一种内置吹尘气路的电主轴气缸
CN112475175A (zh) * 2020-11-13 2021-03-12 江苏新泰隆管件有限公司 一种智能型高效率热模锻压机机床

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