EP1543891A1 - Schliessmechanismus - Google Patents

Schliessmechanismus Download PDF

Info

Publication number
EP1543891A1
EP1543891A1 EP04078322A EP04078322A EP1543891A1 EP 1543891 A1 EP1543891 A1 EP 1543891A1 EP 04078322 A EP04078322 A EP 04078322A EP 04078322 A EP04078322 A EP 04078322A EP 1543891 A1 EP1543891 A1 EP 1543891A1
Authority
EP
European Patent Office
Prior art keywords
tool
locking device
locking
groove
movement
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Withdrawn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
EP04078322A
Other languages
English (en)
French (fr)
Inventor
Anders Alrutz
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.)
KMT HERBER AB
Original Assignee
Herber Industri 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 Herber Industri AB filed Critical Herber Industri AB
Publication of EP1543891A1 publication Critical patent/EP1543891A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends

Definitions

  • the present invention relates to a locking device for a tool included in a machine, having a locking position and an open position, the tool being movable between the locking position and the free position, and vice versa.
  • One commonly occurring type of locking device is a hydraulic system.
  • the hydraulics can either act directly on the tool or via a linkage system, for example an elbow joint lock. While these systems give the desired locking force, there are nevertheless drawbacks inherent in this type of system.
  • a first drawback resides in the hydraulics themselves, with the handling of hydraulic fluid, the risk of leakage, service and maintenance of the hydraulic system etc.
  • Other drawbacks are that specific hydraulic systems with an elbow joint lock require quite a number of components in order to function, and that the systems readily become unwieldy.
  • a further drawback is that the speed of movement is limited, since the dimensions of the system restrict the flow of the hydraulic fluid therein.
  • Pneumatic systems are generally combined with an elbow joint lock. These systems also per se give the locking force, but like the hydraulic systems, pneumatic systems also become bulky and unwieldy, not least because so many components are included. Moreover, these systems function best in long movements of tools, while shorter movements are difficult - not to say impossible - to achieve with the requisite precision. This is essentially because of the resilient action inherent in the air of the system..
  • a further alternative for realising the movement and locking of the tool is to provide a ball screw, i.e. a screw with balls in its threads.
  • a ball screw i.e. a screw with balls in its threads.
  • the object of the present invention is to realise a compact locking device which, on the one hand, displays rapid movement, and, on the other hand, delivers considerable force in the locking position.
  • the locking device intimated by way of introduction is characterised in that the device includes a movable guide and a carrier member guided in the guide which is motionally connected to the tool for realising the movement of the tool between the locking position and the open position, or vice versa.
  • the present invention will be exemplified hereinbelow as applied to a pipe and profile bending machine which has a tool with two parts 4 and 5 which are reciprocally movable towards and away from one another between a closed position where they are urged against one another with a locking force, and an open position where a workpiece may be placed in, moved in or removed from the tool.
  • the present invention may advantageously also be applied to other types of machines and tools where the above-outlined functions and requirements also apply.
  • Fig. 1 shows a part of a pipe bending machine.
  • a separable bending tool 1 which is locked by a locking device 2 according to the present invention.
  • a motor 3 for driving the locking device 2 and a part of the bending tool 1 movable therethrough.
  • the bending tool 1 is separable into two different parts 4, 5 which are reciprocally movable towards and away from one another and simultaneously rotary about a substantially vertical axis Y. While the tool is shown in its open position in Fig. 1, it is shown in its locking position in Fig. 2. When observing Fig. 2, it will be apparent that the straight part 5 has moved a distance to the left in the Figure compared with Fig. 1.
  • the locking movement is substantially realised by the straight part 5 along a slide 6, while the bending of the pipe is carried out around the bending part 4.
  • the vertical axis Y about which rotation of the tool 1 takes place extends through a centre axis through the bending part 4.
  • Fig. 3 shows the tool in its open position and the slide 6 is also visible.
  • the recesses 7 in each respective part 4 and 5 meet and provide a gripping retention of the pipe, as is best apparent from Fig. 2.
  • the parts 4, 5 included in the bending tool 1 are rotary about the substantially vertical axis Y.
  • the bending part 4 displays a series of different radii at different levels along the axis Y. These radii affect the appearance of the bent pipe, more precisely how sharp the bend will be.
  • the bending part 5, as well as the straight part 5 are replaceable so as function for different pipe dimensions and bending radii. The degree of bending is also affected by the degree of rotation of the bending tool 1 in the bending operation.
  • Fig. 4 shows, in a top plan view, the bending tool 1 with the included parts 4 and 5 which, together with the slide 6, are rotary about the axis Y.
  • a pipe 5 during its bending.
  • An abutment 16 abuts against the pipe 15 in order to ensure that the pipe 15 is bent at the intended place, but is otherwise held straight.
  • an additional locking device 2 may also be included so as to move the abutment 16 to and from its working position.
  • a chuck 17 fixedly holds the pipe 15 during the bending phase and advances the pipe 15 predetermined distances between several bending operations in order to realise complex pipe configurations.
  • the chuck 17 is capable of rotating the pipe about its longitudinal axis between the bending operations so that a series of bends gives a pipe configuration with a spatial extent rather than in a single plane. It readily follows from this that the bent end of the pipe may assume an unwieldy configuration and that, as a result, it is of crucial importance that the bending machine is as a compact as possible in order to make maximum room for the pipe.
  • the bending tool 1 is well suited for mass production where a large number of pipes of the same dimension are automatically fed into the machine. A high speed is desirable both in the automatic infeed and during the gripping of the pipes in the tool 1, and in the bending process proper. This places corresponding demands on the locking device 2 in that it must attain rapid movement in the straight part 5, at least during the greater part of the movement to and from the free position. Further, the locking device 2 must realise a powerful locking of the separable tool 1. Thus, considerable force is required from the locking device 2 close to the locking position of the bending tool 1.
  • the locking device 2 is connected to the straight part 5 of the bending tool 1 by the intermediary of a carrier member 10.
  • the carrier member 10 is movable along a line simultaneously with the straight tool part 5, preferably in a slide 6.
  • the direction of this movement is designated the X-direction.
  • the simultaneous movement implies that an action on the carrier member 10 will realise a movement of the straight tool part 5, at least to the extent the movement takes place in the X-direction.
  • the slide 6 only permits that the component of the force which is directed in the X-direction is transferred to the tool part 5.
  • the slide 6 blocks the force in the Z-direction.
  • a movable guide 11 is disposed below the bending tool 1 in order to transfer the movement to the carrier member 10.
  • the design of the movable guide 11 is such that its own movement realises that movement obtained by the carrier member 10. This is attained in that the movable guide 11 is provided with a groove 12 in which the carrier member is guided.
  • the carrier member 10 In an opening or locking movement of the guide 11, the carrier member 10 will be guided in a path which depends on the design of the movable guide 11 and its movement.
  • the guide 11 is designed as a groove 12. Since only movements along the direction of the slide 6, i.e. in the X-direction, will be received by the carrier member 10 and transferred to the tool 1, it is essentially the edges of the groove 12 that are in contact with the carrier member 10. This type of guiding is also called desmodromic guiding or positive guiding.
  • the groove 12 in the guide 11 is also designated a cam surface.
  • the carrier member 10 is designed as a roller that runs freely in the groove 12.
  • the guide 11 is in the form of a cylinder 13 in which the groove 12 is disposed. This is apparent in detail from Fig. 5.
  • the guide 11 is hereby given extremely compact design, since the groove 12 is curved in the circumferential surface of the cylinder 13. This design also affords excellent possibilities for realising, in a simple manner, the movement of the guide 11, more precisely in that the cylinder 13 rotates in either direction about its centre axis.
  • the design of the groove 12 also gives an adaptation of the movement, and in particular its speed, in relation to the speed of the cylinder 13.
  • the configuration of the groove 12 in the cylinder 13 corresponds to the thread of a screw of variable pitch. In the regions where the groove 12 is steepest, the speed of the movable carrier member 10 in the groove 12 will be at its highest in relation to the speed of rotation of the cylinder 13. In those areas where the groove is flat, i.e. where the thread pitch is least, the speed will be slowest in relation to the speed of rotation of the cylinder 13.
  • the pitch of the groove 12 also affects the direction of the contact force that occurs between the carrier member 10 and the edges of the groove 12.
  • the contact force is a normal to the edge of the groove 12, this implies that the force in the X-direction, i.e. in the direction of the slide 6, is at its greatest when the pitch of the groove 12 is at its lowest. In other words, obtain a greater force when the carrier member 10 is located in that part of the groove 12 which corresponds to the locking position of the bending tool 1.
  • the transitions between the different pitches in the groove 12 must be gentle in order to obtain smooth and problem-free operation.
  • the cycle where the moving part 5 moves from the open position to the locking position or the reverse is relatively rapid, typically within one or a few hundredths of a second. Possible unevenness in the groove 12 would consequently give rise to undesirable contact forces, vibrations or jolts which would run the risk of reducing the service life of the locking device 2. Moreover, an unnecessarily high level of noise would be generated.
  • the rapid cycles in locking and opening of the bending tool 1 also entail that a minimisation of the inertia of the cylinder 13 is desirable. Consequently, the intention is to minimise its mass as far as possible without its mechanical strength being reduced to any appreciable degree.
  • this has been solved in that a series of foraminations 18 are provided in the cylinder 13 in those parts of the cylinder 13 where no groove 12 is provided. The quantity of material included in the cylinder 13 is reduced so that the force that is required for accelerating and retarding the cylinder 13 to the desired speed will be a slight as possible.
  • the motor 3 is electric. This in general gives a compact motor that may be placed close to the moving cylinder 13. In the preferred embodiment, the motor 3 is connected via a transmission 14 to the cylinder 13. The compactness of the entire construction enjoys the advantage that there is plenty of space for the partly bent pipe during the bending process. The reason for this is that, in certain machines, where the motor is far too bulky, it is impossible to bend certain types of complicated bent pipes, since the bent pipe has, after a number of sequential bends, such a spatial extent that it is difficult or impossible to apply further bends without the already bent section of the pipe slamming against some part of the machine during the bending movement.
  • the motor is also provided with a torque guide where the maximum permitted torque is adjustable. Since the pitch of the groove 12 affects the torque, the varying pitch will give a varying force. Close to the open position of the tool, the force is at its slightest, which reduces the risk of serious contusion or crushing injury in the event of an accident. On the other hand, close to the locking position, the desired powerful locking force is obtained.
  • the guide is shown as a cylinder 13. It is naturally also possible to make the movable guide 11 planar. A planar disk with a wholly or partly through-going groove however enjoys the advantage that it can realise force and movement in one angle in the plane to its own direction of movement, on condition that the guide is given a design which is suitable for this purpose. This may be interesting in certain applications, where special requirements are placed on the rest of the design of the machine.
  • the groove 12 was at its steepest in the position corresponding to the open position of the tool, so that this is given maximum speed in this region, while the speed is reduced when the tool part 5 approaches the locking position of the tool 1. If another speed pattern is desired, for example a slow movement close to both end positions of the moving part, the groove is designed accordingly.
  • the locking device 2 may also be disposed on other tools and in other positions in a pipe bending machine, for example for supporting the pipe during the bending process or for functioning as an abutment which takes up a part of the reaction forces from the pipe during the bending operation.
  • the locking device 2 according to the present invention also in other types of machines where a corresponding movement is required between an open position and a locking position.
  • machines are injection moulding machines, die casting machines, other casting machines and multi-operation machines, in particular retention jaws in such machines.
EP04078322A 2003-12-18 2004-12-07 Schliessmechanismus Withdrawn EP1543891A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0303427 2003-12-18
SE0303427A SE526757C2 (sv) 2003-12-18 2003-12-18 Låsanordning med rörlig kuliss

Publications (1)

Publication Number Publication Date
EP1543891A1 true EP1543891A1 (de) 2005-06-22

Family

ID=30439739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04078322A Withdrawn EP1543891A1 (de) 2003-12-18 2004-12-07 Schliessmechanismus

Country Status (2)

Country Link
EP (1) EP1543891A1 (de)
SE (1) SE526757C2 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009024406A1 (de) 2009-06-09 2010-12-16 Wafios Ag Rotationsbiegewerkzeug mit Exzenterklemmung
EP2308611A1 (de) * 2009-09-26 2011-04-13 Tracto-Technik GmbH & CO. KG Vorrichtung zum Biegen länglicher Werkstücke
DE102011006173B3 (de) * 2011-03-25 2012-07-12 Wafios Ag Spanneinrichtung zum Spannen eines Werkstücks sowie Biegemaschine mit einer solchen Spanneinrichtung
US8443644B2 (en) 2009-01-16 2013-05-21 Wafios Aktiengesellschaft Rotary-draw bending die with eccentric clamping
CN103706690A (zh) * 2013-12-30 2014-04-09 国能子金电器(苏州)有限公司 多功能变压器一次线折弯工具
CN103706688A (zh) * 2013-12-30 2014-04-09 国能子金电器(苏州)有限公司 多功能变压器弯管机
CN107921503A (zh) * 2015-06-24 2018-04-17 Admc控股有限责任公司 用于弯曲型材的设备包括用于型材的弯曲工具和切割工具
CN108817153A (zh) * 2018-05-30 2018-11-16 芜湖同创模具机械有限公司 一种高效钢管折弯设备
CN109365583A (zh) * 2018-09-18 2019-02-22 南京兴夏家具有限责任公司 一种弯管机
CN111229888A (zh) * 2020-01-22 2020-06-05 马营 一种金属薄管抗皱弯曲加工装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB443542A (en) * 1934-10-12 1936-03-02 Banning A I G J Improvements in or relating to apparatus for bending pipes and rod-shaped pieces of work
US4130004A (en) * 1976-06-03 1978-12-19 Eaton-Leonard Corporation Method for bending tubes
GB2195931A (en) * 1986-10-13 1988-04-20 Chuo Denki Seisakusho Bending apparatus
EP0267410A1 (de) * 1986-10-10 1988-05-18 Carboloy Inc. Spannmittel für konische Werkzeugschäfte
EP0370485A2 (de) * 1988-11-24 1990-05-30 Kabushikikaisha Chuodenkiseisakusho Biegemaschine
GB2293784A (en) * 1994-10-05 1996-04-10 Eurobend Ltd Bending apparatus
EP0881010A1 (de) * 1997-05-30 1998-12-02 Eurobend Limited Biegevorrichtung
EP0919303A2 (de) * 1997-11-13 1999-06-02 Eagle Precision Technologies Inc. Verstellbare Spannvorrichtung für Rohrbiegemaschine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB443542A (en) * 1934-10-12 1936-03-02 Banning A I G J Improvements in or relating to apparatus for bending pipes and rod-shaped pieces of work
US4130004A (en) * 1976-06-03 1978-12-19 Eaton-Leonard Corporation Method for bending tubes
EP0267410A1 (de) * 1986-10-10 1988-05-18 Carboloy Inc. Spannmittel für konische Werkzeugschäfte
GB2195931A (en) * 1986-10-13 1988-04-20 Chuo Denki Seisakusho Bending apparatus
EP0370485A2 (de) * 1988-11-24 1990-05-30 Kabushikikaisha Chuodenkiseisakusho Biegemaschine
GB2293784A (en) * 1994-10-05 1996-04-10 Eurobend Ltd Bending apparatus
EP0881010A1 (de) * 1997-05-30 1998-12-02 Eurobend Limited Biegevorrichtung
EP0919303A2 (de) * 1997-11-13 1999-06-02 Eagle Precision Technologies Inc. Verstellbare Spannvorrichtung für Rohrbiegemaschine

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8443644B2 (en) 2009-01-16 2013-05-21 Wafios Aktiengesellschaft Rotary-draw bending die with eccentric clamping
DE102009024406B4 (de) * 2009-06-09 2013-04-04 Wafios Ag Rotationsbiegewerkzeug mit Exzenterklemmung
DE102009024406A1 (de) 2009-06-09 2010-12-16 Wafios Ag Rotationsbiegewerkzeug mit Exzenterklemmung
DE102009043157B4 (de) * 2009-09-26 2016-01-21 Tracto-Technik Gmbh & Co. Kg Vorrichtung zum Biegen länglicher Werkstücke
EP2308611A1 (de) * 2009-09-26 2011-04-13 Tracto-Technik GmbH & CO. KG Vorrichtung zum Biegen länglicher Werkstücke
DE102009043157A1 (de) * 2009-09-26 2011-08-04 TRACTO-TECHNIK GmbH & Co. KG, 57368 Vorrichtung zum Biegen länglicher Werkstücke
DE102011006173B3 (de) * 2011-03-25 2012-07-12 Wafios Ag Spanneinrichtung zum Spannen eines Werkstücks sowie Biegemaschine mit einer solchen Spanneinrichtung
CN103706690A (zh) * 2013-12-30 2014-04-09 国能子金电器(苏州)有限公司 多功能变压器一次线折弯工具
CN103706688A (zh) * 2013-12-30 2014-04-09 国能子金电器(苏州)有限公司 多功能变压器弯管机
CN107921503A (zh) * 2015-06-24 2018-04-17 Admc控股有限责任公司 用于弯曲型材的设备包括用于型材的弯曲工具和切割工具
CN108817153A (zh) * 2018-05-30 2018-11-16 芜湖同创模具机械有限公司 一种高效钢管折弯设备
CN109365583A (zh) * 2018-09-18 2019-02-22 南京兴夏家具有限责任公司 一种弯管机
CN111229888A (zh) * 2020-01-22 2020-06-05 马营 一种金属薄管抗皱弯曲加工装置

Also Published As

Publication number Publication date
SE0303427L (sv) 2005-06-19
SE526757C2 (sv) 2005-11-01
SE0303427D0 (sv) 2003-12-18

Similar Documents

Publication Publication Date Title
EP1543891A1 (de) Schliessmechanismus
CA1207809A (en) Self-centering work support
EP3360633B1 (de) Vorrichtung und spann-gehäuse
EP0538207B1 (de) Multi-funktionnelle Rohrbiegemaschine
CN102784830A (zh) 液压式全自动管端成型机
WO2007140257A2 (en) Wheel chuck
CN112571116B (zh) 一种防松螺母径向钻孔夹具及方法
CN115301786B (zh) 一种用于管材加工的折弯装置
US4870849A (en) Method for tube bending with controlled clamp die arrangement
CN109160199A (zh) 承载回转装置
CN112893549A (zh) 一种可弯曲变管径与变弯径的管件弯曲成形装置
WO2018165141A1 (en) Fixture assembly
JP3231671B2 (ja) 鍛造プレス機のビレット供給装置
CN209112956U (zh) 一种承载回转装置
EP0127703A1 (de) Einrichtung zum Positionieren eines beweglichen Bauteiles gegenüber einem ortsfesten Bauteil
KR100830515B1 (ko) 중공의 공작물을 변형시키기 위한 성형장치 및 방법
CA1317868C (en) Bending machine
CN210551221U (zh) 五金件的取放料机构
CN210476238U (zh) 一种复合式数控机床
CN102601392A (zh) 一种立车进给刀架
CN220372684U (zh) 侧向夹紧机构
US4925078A (en) Gripper feed device
CN216965933U (zh) 折弯装置
CN215467275U (zh) 一种管道加工用弯管机
KR101741716B1 (ko) 그리드 커플링의 그리드 절곡장치

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR LV MK YU

17P Request for examination filed

Effective date: 20051222

AKX Designation fees paid

Designated state(s): DE GB SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KMT HERBER AB

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RTI1 Title (correction)

Free format text: MACHINE INCLUDING A LOCKING DEVICE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20070913