EP0591732B1 - Verfahren zum Herstellung eines Schluessels mit offenem Ring - Google Patents

Verfahren zum Herstellung eines Schluessels mit offenem Ring Download PDF

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Publication number
EP0591732B1
EP0591732B1 EP93114959A EP93114959A EP0591732B1 EP 0591732 B1 EP0591732 B1 EP 0591732B1 EP 93114959 A EP93114959 A EP 93114959A EP 93114959 A EP93114959 A EP 93114959A EP 0591732 B1 EP0591732 B1 EP 0591732B1
Authority
EP
European Patent Office
Prior art keywords
key
head
open
spanner
polygonal
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.)
Expired - Lifetime
Application number
EP93114959A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0591732A1 (de
Inventor
Massimo Procino
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.)
Utensilerie Associate SpA
Original Assignee
Utensilerie Associate SpA
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 Utensilerie Associate SpA filed Critical Utensilerie Associate SpA
Publication of EP0591732A1 publication Critical patent/EP0591732A1/de
Application granted granted Critical
Publication of EP0591732B1 publication Critical patent/EP0591732B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/04—Spanners; Wrenches with rigid jaws of ring jaw type
    • 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
    • B21K5/00—Making tools or tool parts, e.g. pliers
    • B21K5/16—Making tools or tool parts, e.g. pliers tools for turning nuts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/08—Spanners; Wrenches with rigid jaws of open jaw type

Definitions

  • the above invention relates to a method for Manufacture of an open ring key, furthermore
  • the invention relates to a key with an open ring, which is made with the proposed method.
  • Open-ring keys are tools that are mainly used use when assembling hydraulic systems find, e.g. in braking systems of a motor vehicle.
  • This Tools mostly as a polygonal key are formed, have a on their front mouth-like opening on and in accordance with the Areas that limit the polygonal key mouth an open contact surface is provided, which to the middle of the Schluesselmaules is directed. This will make it Use of such a key possible, the tool over the open mouth to the hydraulic line leading to the Example is designed as a tube, postpone and then to move the key along the hydraulic pipe.
  • the desired one is on the key head polygonal key shape as non-continuous, cup-shaped, flat body made.
  • each blank of the key head is one to undergo machining with which Bottom of the cup-shaped raw body is separated to a support surface for the polygonal structure of the Key head on the mother.
  • a closed ring key is known from US-A 2,774,259 with a surrounding collar to support the Schluesselmaules became known on a mother.
  • This forging tool is complex in its construction and, due to the ring-shaped, thin-walled formation, the this die has to be trained on the key blank a very limited lifespan.
  • a second forging tool is also required to the thin annular collar to the inside of the To transform key mules towards one To form a support collar on the circumference of the bowl.
  • the tool according to US-A 2,774,259 is a closed ring key, the construction of which is not is transferable to an open ring key because it there would be sharp edges on the open side of the Key mules form a substantial would pose a risk of injury.
  • the object of the above invention is to address the disadvantages to avoid the state of the art and create a new one Process for the production of open ring keys to propose which method it is possible to use an open ring key economically manufacture, its polygonal mouth on its inside has the greatest precision.
  • This object is achieved with a method for the production of an open ring key, by pressing a key blank while leaving one Excess material on the inside of the polygonal Key mouth and high-precision finishing of the Inside of the polygonal key mouth, whereby the Excess material is removed and following this Machining operations performing a plastic Deformation of the key head on the circumference of the polygonal Key mouth and material displacement to the inside and in Circumferential direction of the key mouth to form a Overlay thickening.
  • the advantage is achieved that the raw body of the open ring key quickly and economically by a hot press process or a Forging process, according to the manufacturing process for known keys, can be produced.
  • this is according to the invention trained open ring keys in total with 1 marked and has an extension 2 or one Handle with a fork-like head at the end 3 is provided, the mouth 4 of the open ring key circumscribes.
  • the key 1 has on its front an opening 5 to the passage, z.
  • one Hydraulic line 8 ', shown with chain lines is to allow.
  • the key head 3 has on its inside Sidewalls 6 on a hexagon, an octagon or a any polygon or other suitable profile circumscribe that a clear width (a) according to the Dimensions of the nut with which the key 1 to be positively connected.
  • the one Hydraulic line 8 shows that with the help of a Nut 9, which is usually made of aluminum or a other relatively light and soft material exists, is mounted.
  • the head 3 of the key 1 be removed.
  • Key 1, 3 was used as a blank, e.g. B. by a hot pressing process or a forging process, manufactured, in accordance with leave walls 6 (clear width a) of an excess metal.
  • the inside Key mouth 4 of the head 3 of a precision machining e.g. B. subjected to a clearing process. Through this Machining becomes the remaining Removed excess material and with very high precision Dimension of the clear width (a) fixed.
  • the head 3 of the key 1 placed in a pressing tool 10 the raised part 11 the free space 4 of the head 3 of the key 1 on a seat 14 rests, fills out.
  • the raised part 11 has an elevation that is smaller than the thickness (b) the key head 3.
  • the tool 10, 12 is a press ram 13 assigned to the wider than the clear width (a) of the Key head is formed.
  • an economical process e.g. B. a pressing process or a forging process for the manufacture of the raw key body is used. Doing so initially waived the support surface or -to create thickening.
  • the key blanks made in this way then a suitable precision machining, e.g. B. subjected to a clearing process, thus to create a mouth opening (a) with high precision.
  • the connection is made by deforming the key head with a single pressing or stamping process, d.
  • H. one Process with which only a partial deformation in the circumferential direction of the key head is on one side of the Key head created a thickening that is sufficient is a safe support for the open Ring key on the body of a nut or screw to ensure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP93114959A 1992-09-24 1993-09-16 Verfahren zum Herstellung eines Schluessels mit offenem Ring Expired - Lifetime EP0591732B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI922184A IT1255825B (it) 1992-09-24 1992-09-24 Procedimento per la realizzazione di una chiave ad anello aperto
ITMI922184 1992-09-24

Publications (2)

Publication Number Publication Date
EP0591732A1 EP0591732A1 (de) 1994-04-13
EP0591732B1 true EP0591732B1 (de) 1998-07-08

Family

ID=11363989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114959A Expired - Lifetime EP0591732B1 (de) 1992-09-24 1993-09-16 Verfahren zum Herstellung eines Schluessels mit offenem Ring

Country Status (4)

Country Link
EP (1) EP0591732B1 (it)
DE (1) DE59308739D1 (it)
ES (1) ES2117686T3 (it)
IT (1) IT1255825B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW418745U (en) * 2000-05-22 2001-01-11 Lea Way Hand Tool Corp Come-off preventing structure of wrench for turning nut
CN104282505A (zh) * 2013-07-12 2015-01-14 上海工程技术大学 用于一体化螺钉螺母调节锁紧装置的外套筒结构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2715347A (en) * 1952-12-02 1955-08-16 Tubing Appliance Company Inc Webbed open-end box wrench
US2774259A (en) * 1955-07-11 1956-12-18 Frank T Caulkins Method of making box wrenches
US3121356A (en) * 1962-06-14 1964-02-18 Henderson G Davis Slip-proof wrench
FR2227093A1 (en) * 1973-04-27 1974-11-22 Wilmonda Manuf Outillage Double open headed spanner for pipe couplings - series of flats on one head is rotated 30 degrees w.r.t. those on second head
CA1257487A (en) * 1986-05-13 1989-07-18 Edward Izatt Box end wrench

Also Published As

Publication number Publication date
EP0591732A1 (de) 1994-04-13
DE59308739D1 (de) 1998-08-13
IT1255825B (it) 1995-11-17
ES2117686T3 (es) 1998-08-16
ITMI922184A1 (it) 1994-03-24
ITMI922184A0 (it) 1992-09-24

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