US20110265543A1 - Take-off ring - Google Patents

Take-off ring Download PDF

Info

Publication number
US20110265543A1
US20110265543A1 US13/068,055 US201113068055A US2011265543A1 US 20110265543 A1 US20110265543 A1 US 20110265543A1 US 201113068055 A US201113068055 A US 201113068055A US 2011265543 A1 US2011265543 A1 US 2011265543A1
Authority
US
United States
Prior art keywords
take
ring
extends
tongue
elements
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.)
Abandoned
Application number
US13/068,055
Other languages
English (en)
Inventor
Klaus Blei
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.)
L Schuler GmbH
Original Assignee
L Schuler GmbH
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 L Schuler GmbH filed Critical L Schuler GmbH
Assigned to SCHULER PRESSEN GMBH & CO. KG reassignment SCHULER PRESSEN GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLEI, KLAUS
Publication of US20110265543A1 publication Critical patent/US20110265543A1/en
Abandoned 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/06—Stripping-off devices

Definitions

  • the invention resides in a take-off ring which is suitable especially for use in an apparatus for the manufacture of can bodies, for example, in deep-draw presses.
  • apparatus can bodies for pressure containers or beverage cans are manufactured.
  • the can body includes a can bottom and, extending therefrom a can wall which is manufactured from a blank of a single material without a seam or joint area. During this manufacturing process, the can body is disposed on a draw plunger. After the can bottom and the can wall have the desired shape, the can body must be removed from the draw plunger. This is the purpose of the take-off ring.
  • Such a take-off ring is known, for example, from DE 23 35 686.
  • the take-off ring includes several take-off elements which are held together by an elastic means.
  • This elastic means is formed by an elastic casting material.
  • the take-off elements are interconnected by a surrounding ring and, in the end, form a design unit.
  • the manufacture of such a take-off ring is expensive:
  • the take-off elements need to be set correctly aligned to a common radius.
  • the elastic spring-like support is obtained by the elastic property of the casting material.
  • Take-off rings are also known from punching tools for punching or cutting metallic parts. They are used for the removal of punching waste, so-called punched out pieces, which after the punching procedure adhere to the punch and do not fall off, and which are retained by the slide-off arrangement in the piercing die bush when the punch is pulled out of the piercing die bush. In connection with this type of take-off arrangements however, it is not important whether during the slide-off procedure scratches or marks are left on the punched out pieces since they are considered waste material which is not needed anyway.
  • a take-off arrangement for a piercing procedure is described in DE 10 2008 016 722 A1.
  • a removing pin which is pre-tensioned by a spring is provided which, after the punching step pushes the punched out piece away from the plunger.
  • the punched-out piece is retained by the take-off arrangement which includes radially inwardly projecting retaining hooks provided with a conical surface.
  • the punched out piece pushes the retainers radially outwardly as long as it slides along the conical area of the retainers as soon as the punched out piece is below the retainer they spring back radially inwardly and extend over in front of the punched out piece.
  • the arrangement provides for a design of very long axial length.
  • the take-off arrangements may be arranged not in the deep draw can for drawing the can body, but axially adjacent the deep draw can. It may therefore be considered to be an object of the invention to provide a take-off arrangement with which the additional stroke of the deep draw plunger required by the take-off arrangement is relatively small.
  • a take-off ring which includes an annular base section. This base section extends radially inwardly by a spring section which defines a pivot axis extending in circumferential direction. Radially inwardly adjacent the spring section, there is a transition section which is pivotable about the pivot axis about in axial direction of the take-off ring. From the transition section a take-off tongue extends transverse to the radial direction and transverse to the circumferential direction of the take-off ring. The free end of the take-off tongue is radially and axially spaced from the pivot axis.
  • the take-off elements are preferably arranged evenly distributed about the circumference.
  • the can body Upon sliding the can body through the take-off ring, the can body moves along the inner surfaces of the take-off tongues up to the free ends thereof whereby the take-off elements are pivoted about the circumferentially extending pivot axis.
  • the free ends of the take-off tongues move as a result axially along the longitudinal axis of the take-off ring and, at the same time, radially outwardly.
  • the slide-off tongues spring back radially so as to abut the plunger. With the subsequent return movement of the draw plunger, the edge of the can wall abuts the free end of the take-off tongues and is moved off the draw plunger.
  • This take-off ring is particularly suitable for use in connection with deep draw presses.
  • the length of the take-off rings in axial direction is mostly determined by the length of the take-off tongues.
  • the attachment of the take-off rings in axial extension of the deep draw can occur by the base section.
  • the base section, the spring sections and the transition sections therefore form a flange extending surrounding the take-off tongues annularly in circumferential direction.
  • the take-off ring may be manufactured from a single piece without connections or joints that is so-to-say integrally.
  • the basis section, the spring section, the transition section, as well as the take-off tongues therefore, consist of the same material and are free of any joints.
  • the take-off ring consists of a metal.
  • the take-off ring could also be made of a plastic material.
  • the take-off tongues of the take-off ring are inclined with respect to the longitudinal axis thereof.
  • the inner surfaces of the take-off rings extend at an acute angle with respect to the longitudinal axis of the take-off ring.
  • the inner surfaces of the take-off elements may be disposed on a common truncated cone surface with annular base area. In this embodiment, the inner surfaces are curved in circumferential direction.
  • a gap may be provided between two adjacent take-off elements to permit an uninhibited pivot movement about the pivot axis.
  • This gap has in the area between two spring sections preferably an increase gap end which can easily be manufactured by bores between two spring sections.
  • the bores may extend in axial direction and define the pivot axis of the spring section.
  • the thickness of the take-off tongues measured normal to the respective inner surface is expediently constant.
  • the inner surfaces are in particular planar and without radial projections or recesses so that the can body to be taken off can be easily moved along the inner surfaces.
  • FIGS. 1-3 an exemplary embodiment of a take-off ring in use position adjacent a can to be taken off a deep draw press at various situations during the manufacture of the can body;
  • FIG. 4 an exemplary embodiment of the take-off ring according to FIG. 1 in a view taken in an axial longitudinal direction;
  • FIG. 5 the take-off ring in a sectional view taken along line A-A of FIG. 4 ;
  • FIG. 6 a perspective representation of an individual take-off element of the take-off ring according to FIGS. 4 and 5 ;
  • FIG. 7 a schematic representation of the pivot movement of a take-off element about the pivot axis of a spring section.
  • FIGS. 4 and 5 show a preferred exemplary embodiment of a take-off ring 10 .
  • the take-off ring 10 is preferably installed in an apparatus for the manufacture of can bodies 11 .
  • Such an apparatus can also be called a deep-draw press 12 and is shown schematically in FIG. 1 .
  • the deep draw press 12 includes a down holder 13 with a hollow cylindrical down holder section 14 .
  • the down holder 13 can be moved by a down holder drive 15 in an operating direction Z.
  • the operating direction Z extends parallel to the longitudinal axis of the down holder 13 .
  • a drawing plunger 18 Co-axially with regard to the down holder 13 a drawing plunger 18 is arranged.
  • the drawing plunger 18 can be moved in this movement through the hollow-cylindrical down holder section 14 by a plunger drive 19 into a draw-down or deep-draw opening 20 of a lower tool 21 provided herefor.
  • the draw-down opening 20 in the lower tool 21 is hollow cylindrical and may have several concentric sections with different radii.
  • the draw-down opening 20 in the lower tool 21 has an entrance opening 22 and an opposite exit opening 23 .
  • the take-off ring 10 Co-axially with the draw-down opening 20 and the exit opening 23 the take-off ring 10 is releasably mounted to the lower tool 21 , for example, by a screw connection.
  • the longitudinal axes of the draw-down opening 20 , of the drawing plunger 18 and the take-off ring 10 form in operating position a common longitudinal axis L.
  • FIGS. 1-3 show schematically the manufacture of the can body 11 .
  • a pot-shaped blank 25 is provided on the lower tool 21 coaxially with the entrance opening 22 .
  • This pot-like blank 25 is called a “cup”.
  • the down holder drive 15 then moves the down holder in the operating direction Z so that the hollow cylindrical down holder section 14 engages into the blank 25 and presses the bottom of the blank 25 against an annular surface area around the entrance opening 22 of the lower tool 21 .
  • the plunger drive 19 moves the drawing plunger 18 in the operating direction Z through the down holder 13 into the hollow-cylindrical draw-down opening 20 .
  • the drawing plunger 18 pressing down the bottom of the blank pulls the blank bottom into the hollow-cylindrical draw-down opening 20 .
  • the gap remaining between the outer circumferential surface of the drawing plunger 18 and the inner surface of the draw-down opening 20 determines the thickness of the can wall of the can body 11 to be manufactured. It can be reduced stepwise within the draw-down opening 20 .
  • the drawing plunger moves the can body manufactured in this way completely out of the exit opening 23 .
  • the drawing plunger 18 and the can body 11 move through the central opening 26 of the take-off ring 10 .
  • the take-off ring 10 includes a plurality of take-off elements 27 which are arranged in circumferential direction next to one another.
  • the take-off elements 27 are moved radially outwardly with respect to the longitudinal axis L as it is shown schematically in FIG. 2 .
  • the take off elements 27 spring back inwardly because of the spring pre-tension and then directly abut the drawing plunger 18 .
  • the drawing plunger 18 is moved back by the plunger drive 19 in a direction opposite the operating direction R the take off ring 10 abutting the drawing plunger 18 slides the completed can body 11 off the drawing plunger 18 .
  • the design of the take-off ring as proposed by the invention provides for a short axial length of the take-off ring.
  • the take-off ring 10 consists of a single material which is for example a metal. It is of an integral design without connecting or joint areas so that a simple and precise manufacture is facilitated.
  • the take-off ring 10 consists of an annular flange 30 which is arranged coaxially with respect to the longitudinal axis L.
  • An annual area 31 of the annular flange 30 is in contact with the lower tool 21 of the deep draw press 12 when the ring 10 is installed.
  • the plane in which the annular area 31 is disposed extends at a right angle to the longitudinal axis L and forms the upper side of the take-off ring 10 . No other components of the take-off ring 10 penetrate the plane of the annular surface 31 .
  • the radially outer part of the annular flange 30 is formed by an annular base section 32 .
  • the annular base section 32 is in the circumferential direction U without interruption and has for example a rectangular cross-section.
  • the base section 32 interconnects the take-off elements 27 which are disposed radially within the base section 32 unreleasably with one another.
  • the take-off elements 27 have as seen in a circumferential direction U an angled shape wherein a first leg 33 is part of the annular flange 30 .
  • a second leg 34 extending transversely thereto forms a take-off tongue 35 .
  • the first leg 33 of the take-off element 27 is divided into two sections.
  • a spring section 38 connects the take-off element 27 to the base section 32 .
  • the base section 32 and the spring sections 38 and the transition sections 39 of the take off elements 27 form together the annular flange 30 .
  • the thickness of the sections 32 , 38 , 39 forming the annular flange 30 is constant as measured in the direction of the longitudinal axis L.
  • the take-off tongue 35 has a first axial end 40 which is connected to the transition section 39 . Starting from the first axial end 40 , the take-off tongue 35 extends to its second free axial end 41 .
  • the take-off tongue 35 includes an inner surface area 42 facing the longitudinal axis L.
  • the inner surface area 42 extends over the whole length of the take-off tongue from the first axial end 40 to the second axial end 41 . It forms with the transition area 39 at the first axial end 40 a first edge 43 .
  • the inner surface area 42 ends at a second edge 44 . At this second edge 44 the inner surface area 42 forms a front face 45 of the take-off tongue 35 extending about in the direction of the longitudinal axis L. This area transition is about rectangular.
  • the take-off ring 10 extends in the longitudinal direction L from the annular area 31 to the free end 41 of the take-off elements 27 . As a result, it may be very short in the longitudinal direction L.
  • the take-off tongue 35 and in particular the inner surface 42 is inclined with respect to the longitudinal axis L.
  • a straight line extending parallel to the longitudinal axis L intersects the inner surface 42 of the take-off tongue 35 at an angle of inclination ⁇ .
  • the inclination angle ⁇ is preferably smaller than 10° and is in particular in the range of 3 to 7 degrees.
  • the inner surface areas 42 of the take-off tongues 35 of the take-off ring 10 are curved in the circumferential direction U of the take-off ring 10 .
  • the first edges 43 are disposed on a common radius R 1 around the longitudinal axis L and the second edges 44 are disposed on a common second radius R 2 around the longitudinal axis L.
  • the second radius R 2 is smaller than the first radius R 1 .
  • the outer diameter of the can body 11 is smaller than the first radius R 1 and larger than the second radius R 2 .
  • the inner surface areas 42 of all take-off elements 27 are disposed on a common truncated cone surface area.
  • the take-off elements 27 of the take-off ring 10 are interconnected exclusively by the common base section 32 . Between two adjacent take-off elements 27 there is a gap 48 . In a first gap area 49 between two adjacent take-off tongues 35 and two adjacent transition areas 39 , the gap has in the circumferential direction U a constant gap width B. Between the two adjacent spring sections 38 the first gap area 49 becomes the second gap area which forms a gap end 50 that is widened in the circumferential direction U.
  • the widened gap end 50 is formed in the exemplary embodiment by cylindrical bores whose cylinder axes extend parallel to the longitudinal axis L of the take-off ring 10 .
  • the cylinder axes 51 of the bores are disposed on a common third radius R 3 about the longitudinal axis L.
  • the first gap areas 49 extend in planes which are defined by the longitudinal axis L and a radial direction, wherein two of the planes of adjacent first gap areas 49 form an angle ⁇ in the area of preferably 5 to 10 degrees.
  • the first leg 33 of the take-off element 27 is narrowed down between two gap ends 50 as seen in the circumferential direction U.
  • the spring section 38 is formed which facilitates a pivoting of the transition area 39 together with the take-off tongue 35 about a pivot axis 55 .
  • the pivot axes 55 of the take-off elements 27 are disposed on a common radius about the longitudinal axis L which corresponds to the third radius R 3 .
  • the common pivot movement of the take-off tongues 35 with the transition section 39 is shown schematically in FIG. 7 .
  • the take-off tongue 35 is not only pressed radially outwardly, but there is an additional movement in operating direction Z, that is in the direction of the longitudinal axis L as well as radially thereto.
  • the take-off tongue 35 moves together with the can container 11 , a distance in the operating direction Z. In this way, the resistance which the take-off elements 27 generate against the movement of the can body 11 can be kept very low. In this way, the formation of scratches or grooves on the can body is avoided.
  • the take-off elements 27 pivot back to their original position whereby the inner surface areas 42 come into contact with the drawing plunger 18 .
  • the front face of the can wall of the can body 11 abuts the front faces 45 of the take-off tongues 35 . That is the front faces 45 form stops areas 46 for the can body 11 .
  • the force imparted during the return movement of the drawing plunger 18 and applied via the can body 11 to the take-off tongues 35 is supported by the lower tool 21 .
  • the can body 11 is in this way pushed off the drawing plunger 18 .
  • the invention relates to a take-off ring 10 which is provided in particular for use in connection with deep-draw presses 12 . It serves for removing a top-shaped can body 11 from a drawing plunger 18 .
  • the take-off ring 10 includes a multitude of take-off elements 27 which are arranged uniformly distributed in circumferential direction U and separated in each case by a gap 48 .
  • the take-off elements 27 are interconnected by an annular base section 30 which extends around the take-off elements 27 in the circumferential direction U.
  • the transition section 39 is pivotable by way of the spring section 38 about a pivot axis 55 which extends in the circumferential direction U.
  • a take-off tongue 35 extends in a transverse direction away from the transition section 39 toward a free end 41 .
  • the front face 45 of the take-off tongue 35 present at the free end 41 forms a support surface 46 , which abuts the can body 11 during take off of the can body 11 from the drawing plunger 18 .
  • the take-off ring 10 permits a design of short axial length L. It is easy to manufacture and easily exchangeable.
US13/068,055 2010-05-03 2011-04-29 Take-off ring Abandoned US20110265543A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010019322.4-14 2010-05-03
DE102010019322A DE102010019322B4 (de) 2010-05-03 2010-05-03 Abstreifring

Publications (1)

Publication Number Publication Date
US20110265543A1 true US20110265543A1 (en) 2011-11-03

Family

ID=44650668

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/068,055 Abandoned US20110265543A1 (en) 2010-05-03 2011-04-29 Take-off ring

Country Status (4)

Country Link
US (1) US20110265543A1 (de)
EP (1) EP2384836A1 (de)
JP (1) JP2011235357A (de)
DE (1) DE102010019322B4 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528577A (en) * 1949-05-05 1950-11-07 Remington Arms Co Inc Metal drawing stripper
US3886781A (en) * 1974-06-19 1975-06-03 Standun Force equalized external stripper for metalworking machines and the like
US3893326A (en) * 1972-11-16 1975-07-08 Wmf Wuerttemberg Metallwaren Apparatus for reduction drawing of hollow bodies of stainless steel
US3955394A (en) * 1975-01-09 1976-05-11 Gulf & Western Manufacturing Company (Hastings) Stripping device for ironing presses
US5970775A (en) * 1998-08-11 1999-10-26 Can Industry Products, Inc. Method and apparatus for forming cup-shaped container bodies
US7243520B2 (en) * 2003-07-23 2007-07-17 Crown Packaging Technology, Inc. Stripping assembly
US8375762B2 (en) * 2007-04-25 2013-02-19 Toyo Seikan Kaisha, Ltd. Stripper device for can drawing and ironing apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2335686A1 (de) 1973-07-13 1975-01-30 Krupp Gmbh Abstreifring
DE2335868A1 (de) * 1973-07-14 1975-01-30 Helmut Hilger Geraet zum reinigen langgestreckter hohlraeume
GB1537318A (en) * 1976-06-11 1978-12-29 Metal Box Co Ltd Stripping apparatus
US4095452A (en) * 1976-12-07 1978-06-20 West Mark Denver, Inc. Can body stripper
US5001919A (en) * 1990-04-13 1991-03-26 Adolph Coors Company Apparatus for stripping workpieces
DE102008016722A1 (de) * 2008-03-31 2009-10-01 Fibro Gmbh Stanzwerkzeug

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528577A (en) * 1949-05-05 1950-11-07 Remington Arms Co Inc Metal drawing stripper
US3893326A (en) * 1972-11-16 1975-07-08 Wmf Wuerttemberg Metallwaren Apparatus for reduction drawing of hollow bodies of stainless steel
US3886781A (en) * 1974-06-19 1975-06-03 Standun Force equalized external stripper for metalworking machines and the like
US3955394A (en) * 1975-01-09 1976-05-11 Gulf & Western Manufacturing Company (Hastings) Stripping device for ironing presses
US5970775A (en) * 1998-08-11 1999-10-26 Can Industry Products, Inc. Method and apparatus for forming cup-shaped container bodies
US7243520B2 (en) * 2003-07-23 2007-07-17 Crown Packaging Technology, Inc. Stripping assembly
US8375762B2 (en) * 2007-04-25 2013-02-19 Toyo Seikan Kaisha, Ltd. Stripper device for can drawing and ironing apparatus

Also Published As

Publication number Publication date
JP2011235357A (ja) 2011-11-24
EP2384836A1 (de) 2011-11-09
DE102010019322B4 (de) 2012-02-16
DE102010019322A1 (de) 2011-11-03

Similar Documents

Publication Publication Date Title
US10751781B2 (en) Punch assembly with replaceable punch tip
US5435049A (en) Apparatus for joining sheet material
US10092940B2 (en) Method for forming a pressed component, method for manufacturing a pressed component, and die apparatus for forming a pressed component
JP5803127B2 (ja) 転がり軸受の軌道輪用粗形材の製造方法
KR20150106394A (ko) 프레스 부품의 성형 방법, 프레스 부품의 제조 방법 및 프레스 부품의 성형용 금형
US20120204618A1 (en) Device, method and tool for producing a rimmed passage in a component
US20120316001A1 (en) Pierce nut manufacturing apparatus
US8978220B2 (en) Tool and die for a riveting tool
KR101604333B1 (ko) 중공형상의 단조품 성형 금형의 단조품 취출구조
US20110265543A1 (en) Take-off ring
US20150336148A1 (en) Dummy block for extrusion press
EP2921241B1 (de) Clinchvorrichtung und Verfahren zur dessen Herstellung
US20090229432A1 (en) Punching method using punch and punch for punching
CN201253874Y (zh) 环形废料切刀
CN112207202B (zh) 一种锥形挡圈镦挤压成形方法
US20140360002A1 (en) Method of forming pipe end structure
JP5406650B2 (ja) 筒状ワークのピアス加工装置及び筒状ワークの成形装置
CN216729354U (zh) 热锻加工被动齿轮坯体用外模盘
CN113399561B (zh) 一种用于加工锥形薄壁件的装置
US6672126B2 (en) Stepped cam die
EP2407258B1 (de) Verfahren zur Herstellung einer Riemenscheibe für Kraftfahrzeugsanwendungen und dergleichen mit einer Mehrzahl von V-förmigen peripheren Nuten
EP2725276A2 (de) Verformbare Tülle für eine Schlaucharmatur
EP2366473B1 (de) Verfahren und Vorrichtung zur Herstellung einer Riemenscheibe für Kraftfahrzeugsanwendungen
CN112893646A (zh) 一种圆变方拉深方法及其拉深模具
US20100011932A1 (en) Cutting punch holder

Legal Events

Date Code Title Description
AS Assignment

Owner name: SCHULER PRESSEN GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BLEI, KLAUS;REEL/FRAME:026517/0105

Effective date: 20110513

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION