EP1405682A2 - Outil de formage expansible - Google Patents

Outil de formage expansible Download PDF

Info

Publication number
EP1405682A2
EP1405682A2 EP20030021425 EP03021425A EP1405682A2 EP 1405682 A2 EP1405682 A2 EP 1405682A2 EP 20030021425 EP20030021425 EP 20030021425 EP 03021425 A EP03021425 A EP 03021425A EP 1405682 A2 EP1405682 A2 EP 1405682A2
Authority
EP
European Patent Office
Prior art keywords
actuator
channel
forming tool
workpiece
accordance
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.)
Granted
Application number
EP20030021425
Other languages
German (de)
English (en)
Other versions
EP1405682A3 (fr
EP1405682B1 (fr
Inventor
Carl Peterhansel
Jonathan W Chomicz
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.)
Trumpf Inc
Original Assignee
Trumpf Inc
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
Priority claimed from US10/264,909 external-priority patent/US20040065135A1/en
Application filed by Trumpf Inc filed Critical Trumpf Inc
Publication of EP1405682A2 publication Critical patent/EP1405682A2/fr
Publication of EP1405682A3 publication Critical patent/EP1405682A3/fr
Application granted granted Critical
Publication of EP1405682B1 publication Critical patent/EP1405682B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/10—Incompletely punching in such a manner that the parts are still coherent with the work
    • 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
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal

Definitions

  • the present invention relates to tools for forming and cutting sheet metal workpieces and the like.
  • Machine tools are widely utilized to form sheet metal workpieces into a desired configuration by cooperating upper and lower dies which are configured to provide the contours in the workpiece.
  • the configured forming tool is located in the head of the machine and is moved downwardly against the workpiece which is disposed upon a die that cooperates with the forming tool.
  • Many of such dies have a resiliently deformable portion which facilitates the forming of the metal about the contours of the forming tool.
  • Such tooling may simply deform the workpiece to provide the desired contours and the cooperating surfaces of the components will generally have radiused edges.
  • Other tooling may cut through the workpiece and their components will have sharp cooperating edges to shear the workpiece.
  • Some tooling may provide both forming and cutting action by the providing forming edges about a portion of the periphery and cutting edges about the remainder of the periphery.
  • forming and “forming tools” as used herein encompass tools which merely form the workpiece into a desired configuration, tools which cut through the workpiece, and tools which combine both forming and cutting actions.
  • machine tools have a limitation as to the diameter of the forming tool which can be employed. If that diameter of the conventional forming tool is less than the length of the contour to be formed, multiple operations may be required to effect the formation of the full length of the desired contour. This is costly in terms of time required, and it can require use of multiple tools to obtain the desired formation.
  • an expandable forming tool having a body with a mounting stem on its upper surface and a transversely extending channel in its lower surface.
  • a wedge-shaped actuator has its smaller, upper end slidably seated in the channel for movement vertically therein and has its larger, lower end normally depending from the body.
  • the actuator has inwardly sloping side surfaces which bear against cooperatively sloping side surface of a pair of slide members slidably seated in the channel on opposite sides of the wedge-shaped actuator.
  • Slide member biasing means biases the slide members against the sloping surfaces of the actuator, and actuator biasing means biases the actuator outwardly of the body.
  • the actuator is driven vertically inwardly of the channel by movement of the larger lower end against an opposing surface usually provided by a cooperating die, and the inward movement of the actuator pushes the slide members outwardly in the channel so as to project beyond the periphery of the body.
  • the actuator and the slide member may have their lower surfaces cooperatively configured to form a contour in a workpiece against which they are driven, or the edges of the lower surfaces may be sharp to cut through the workpiece, or both sharp and radiused edges in different portions may be provided to both form and cut different portions of a workpiece.
  • the bottom surfaces cooperate with similar edges on the top surface of a die underlying the workpiece.
  • the slide member and the larger end of the actuator have their lower surfaces lying in a common plane when the actuator is fully moved inwardly of the body.
  • the body has depending portions at the upper and outer ends of the channel and the slides have cooperating upstanding portions at their inner ends.
  • the slide member biasing means comprises compression springs seated between these depending and upstanding portions.
  • the stem and the body have aligned axial passages therein opening into the channel, and an actuator retainer is slidably seated in the axial passages.
  • the actuator biasing means includes a compression spring acting between the upper end portion of the actuator retainer and a shoulder in the passage in the stem.
  • the axial passage in the body has a shoulder formed thereabout adjacent its upper end and the actuator retainer has a collar which abuts the upper surface of the shoulder to retain the actuator in the body.
  • the punch or forming tool cooperates with a die having an upper surface which is generally complimentary to the lower surface of the forming tool or punch. Sharp edges are provided in portions where the workpiece is to be cut and arcuate edges are provided where the workpiece is to be contoured.
  • An expandable forming tool embodying the present invention is shown in the attached drawings and is generally comprised of a body generally designated by the numeral 10, an actuator generally designated by the numeral 12, and a pair of slides generally designated by the numeral 14.
  • the body 10 comprises a generally circular housing 16 with a transversely extending channel 18 in its lower surface terminating in depending end walls 20.
  • a concentric, generally cylindrical stem 22 on the upper surface has a bore or passage 24 extending therethrough.
  • the upper end portion of the bore 24 is threaded and receives a threaded cap 26 and the lower portion seats a compression spring 28 which bears upon the cap 26.
  • a concentric passage 27 extends through the body 10 from the bore 24 to the channel 18.
  • the slides 14 Slidably seated in the channel 18 are the slides 14 which have their bottom surface 29 configured to form the desired contour in a workpiece and an upstanding portion 30 on their inner ends which cooperate with the depending end walls 20 of the body to define recesses 31 in which are seated compression springs 32 which bias the slides 14 inwardly.
  • the lower portions 34 of the inner end surface of the slides 14 are angled outwardly downwardly.
  • the actuator 12 is generally wedge shaped with outer end surfaces 36 which angled outwardly downwardly to cooperate with the lower portions 34 of the slides 14.
  • the bottom surface 38 of the actuator is contoured cooperatively with the bottom surfaces 29 of the slides 14 to produce the desired contour in the workpiece.
  • the upper end of the actuator 12 has a threaded bore 40 which threadably seats the shank 42 of the bolt generally designated by the numeral 44 and which extends through the passage 27 in the body 10.
  • the spring 28 bears upon the head 46 of the bolt 44 to bias the actuator 12 outwardly of the channel 18 in the body 10 as seen in Figure 1 in which position the slides 12 are disposed within the periphery of the body 10.
  • the expandable forming tool of Figures 1-6 cooperates with a die shown in Figures 7a-7e and generally designated by the numeral 48 to deform a sheet metal workpiece schematically illustrated and designated by the numeral 50.
  • the actuator 12 is retained in the body 10 by the retainer bolt 44. Since the actuator 12 is positively held in place, this also effects the retention of the slides 14 within the body 10.
  • the slides 14 and the compression springs 32 are initially assembled in the body 10.
  • the actuator 12 is then moved into place between them and the bolt 44 is threadably engaged therein.
  • the compression spring 28 is then placed within the passage 24 in the stem 22, and the cap 26 is threaded inwardly of the stem to trap the spring 28 in position and to hold all of the elements in assembly.
  • Figures 7a-7e the operation of the expandable tool is diagrammatically illustrated.
  • the forming tool has been clamped in position in the machine tool (not shown) and the actuator 12 is in its at rest position extending substantially outwardly of the body 10.
  • the springs 32 are biasing the slides 14 against its side surfaces of the actuator 12 so that they are fully disposed within the periphery of the body 10.
  • the sheet material workpiece 50 is disposed on the die 48 located in the bed of the machine tool (not shown).
  • FIG. 8-10 therein illustrated is a forming tool which will both cut and contour the workpiece in a single stroke.
  • the basic structure of the tool is the same as that illustrated in Figures 1-7 except for the bottom or working surface of the tool, and the parts have the same reference numerals with the letter "a" appended thereto.
  • Figures 11 and 12 illustrate a part produced thereby with a louver opening 100 formed therein.
  • An arcuate wall 102 extends away from the plane of the workpiece 104 along the length thereof to provide an opening 106 for air to pass therethrough and thence through the louver 100.
  • the ends of the louver 100 are formed with a similar arcuate configuration.
  • the louver surfaces of the slides 14a and actuator 12a are machined to provide cooperating and aligned recesses 108 which have an arcuate portion 110 corresponding to the arcuate wall 102 and a sharp edge portion 118 to cut through the workpiece 104 and provide the opening 106.
  • the ends 112 of the recesses 108 in the slides 14a are arcuate to produce the arcuate ends of the louver formation.
  • the forming tool illustrated in Figures 8-10 cooperates with the die illustrated in Figure 12 and generally designated by the numeral 110.
  • the die 110 is comprised of a body 120 having a stepped channel 112 formed in its upper surface in which is seated the ejector 124 and the resiliently compressible member 126.
  • a rib 128 borders the channel and has a sharp edge 120 at the upper end of the vertical face which is aligned with the channel 112 and an arcuate surface 122.
  • the rib 118 may be provided by a readily replaceable insert seated in a channel adjacent the channel 112.
  • the sharp edge 130 of the forming tool 100 cooperates with the sharp edge 120 of the die 110 to cut the metal and allow the adjacent portion of the workpiece 104 to form about the adjacent arcuate surface 122 of the die.
  • the expandable forming tool of the present invention may be fabricated readily easily and economically and provides an expanded forming surface. This enables the fabrication of workpieces more quickly and enables far less complex forming dies than might otherwise be required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Milling Processes (AREA)
EP20030021425 2002-10-04 2003-09-23 Outil de formage expansible Expired - Lifetime EP1405682B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US660022 1984-10-12
US10/264,909 US20040065135A1 (en) 2002-10-04 2002-10-04 Expandable forming tool
US264909 2002-10-04
US10/660,022 US6959582B2 (en) 2002-10-04 2003-09-11 Expandable forming tool

Publications (3)

Publication Number Publication Date
EP1405682A2 true EP1405682A2 (fr) 2004-04-07
EP1405682A3 EP1405682A3 (fr) 2005-01-05
EP1405682B1 EP1405682B1 (fr) 2010-06-23

Family

ID=31996809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030021425 Expired - Lifetime EP1405682B1 (fr) 2002-10-04 2003-09-23 Outil de formage expansible

Country Status (1)

Country Link
EP (1) EP1405682B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102938493A (zh) * 2011-08-16 2013-02-20 上海航天测控通信研究所 一种航天器大口径天线卸载机构
CN106424426A (zh) * 2016-12-07 2017-02-22 贵州黎阳航空动力有限公司 一种双层壁大锥度内锥收口装置及收口方法
CN106493229A (zh) * 2016-11-24 2017-03-15 广东茵坦斯能源科技有限公司 一种用于生产电器盒的折弯模具
CN107186061A (zh) * 2017-06-27 2017-09-22 苏州新睿琪金属科技有限公司 新能源锂电池薄壁铝壳胀方机
CN111993001A (zh) * 2020-08-24 2020-11-27 石家庄恒融世通电子科技有限公司 引线框架模具及成型凸模加工方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB716082A (en) * 1951-08-31 1954-09-29 Svetsmekano Ab Improvements in machines for pressing grooves or vents in sheet material
US2728316A (en) * 1951-08-31 1955-12-27 Svetsmekano Ab Combined shearing and pressing tool
US3890869A (en) * 1972-11-29 1975-06-24 Mark Products Corp Van Louver cutter
US3943744A (en) * 1974-06-19 1976-03-16 Tapco Products Company, Inc. Louver cutter
GB2033788A (en) * 1978-09-07 1980-05-29 Mercer Nairne & Co Ltd Improved tool for forming louvres and the like
US4519235A (en) * 1983-10-13 1985-05-28 Gauck Donald A Louver tool
US5392629A (en) * 1993-10-26 1995-02-28 Canoga Industries Inc. Method and apparatus for forming multi-level features in an object
GB2369317A (en) * 2000-11-28 2002-05-29 Colin Maxwell Wade Ductile material lance joiner

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB716082A (en) * 1951-08-31 1954-09-29 Svetsmekano Ab Improvements in machines for pressing grooves or vents in sheet material
US2728316A (en) * 1951-08-31 1955-12-27 Svetsmekano Ab Combined shearing and pressing tool
US3890869A (en) * 1972-11-29 1975-06-24 Mark Products Corp Van Louver cutter
US3943744A (en) * 1974-06-19 1976-03-16 Tapco Products Company, Inc. Louver cutter
GB2033788A (en) * 1978-09-07 1980-05-29 Mercer Nairne & Co Ltd Improved tool for forming louvres and the like
US4519235A (en) * 1983-10-13 1985-05-28 Gauck Donald A Louver tool
US5392629A (en) * 1993-10-26 1995-02-28 Canoga Industries Inc. Method and apparatus for forming multi-level features in an object
GB2369317A (en) * 2000-11-28 2002-05-29 Colin Maxwell Wade Ductile material lance joiner

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102938493A (zh) * 2011-08-16 2013-02-20 上海航天测控通信研究所 一种航天器大口径天线卸载机构
CN102938493B (zh) * 2011-08-16 2016-04-27 上海航天测控通信研究所 一种航天器大口径天线卸载机构
CN106493229A (zh) * 2016-11-24 2017-03-15 广东茵坦斯能源科技有限公司 一种用于生产电器盒的折弯模具
CN106424426A (zh) * 2016-12-07 2017-02-22 贵州黎阳航空动力有限公司 一种双层壁大锥度内锥收口装置及收口方法
CN106424426B (zh) * 2016-12-07 2018-01-23 贵州黎阳航空动力有限公司 一种双层壁大锥度内锥收口装置
CN107186061A (zh) * 2017-06-27 2017-09-22 苏州新睿琪金属科技有限公司 新能源锂电池薄壁铝壳胀方机
CN111993001A (zh) * 2020-08-24 2020-11-27 石家庄恒融世通电子科技有限公司 引线框架模具及成型凸模加工方法

Also Published As

Publication number Publication date
EP1405682A3 (fr) 2005-01-05
EP1405682B1 (fr) 2010-06-23

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