EP0433539A1 - Couteau à actionnement oscillatoire - Google Patents

Couteau à actionnement oscillatoire Download PDF

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Publication number
EP0433539A1
EP0433539A1 EP90111188A EP90111188A EP0433539A1 EP 0433539 A1 EP0433539 A1 EP 0433539A1 EP 90111188 A EP90111188 A EP 90111188A EP 90111188 A EP90111188 A EP 90111188A EP 0433539 A1 EP0433539 A1 EP 0433539A1
Authority
EP
European Patent Office
Prior art keywords
blade
cutting
knife
coating
adhesive layer
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Withdrawn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
EP90111188A
Other languages
German (de)
English (en)
Inventor
Johann Wilhelm Dipl.-Ing. Mütter
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.)
Muetter Wilhelm
Original Assignee
Muetter Wilhelm
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 Muetter Wilhelm filed Critical Muetter Wilhelm
Publication of EP0433539A1 publication Critical patent/EP0433539A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/086—Means for treating work or cutting member to facilitate cutting by vibrating, e.g. ultrasonically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B7/00—Hand knives with reciprocating motor-driven blades

Definitions

  • the present invention relates to a cutting knife for a cutting tool with an oscillating drive for cutting through adhesive layers, in particular on glued-on windows of motor vehicles, with a knife shank which can be connected to the oscillating drive of the cutting tool and with a blade which has at least one cutting edge and two opposite, has side surfaces extending from the cutting edge.
  • Knives of this type are known in various forms.
  • the shaft and blade consist of a flat, strip-shaped metal part and are directly connected to one another in one plane.
  • there is an intermediate part with a bend between the shaft and the blade such that the flat shaft part is located in a plane that is offset from the plane of the blade surface and possibly slightly inclined.
  • the shaft can be attached to the angled intermediate part in such a way that either a Z-shape or a U-shape results in the side view.
  • the shaft is connected to the oscillating drive of a generally electrically or pneumatically operated cutting tool via a fastening element.
  • This drive can perform rotary oscillations, so that the knife executes oscillatory rotary movements about an axis which is essentially perpendicular to the plane defined by the blade and thereby, for example, separates the adhesive bead of the windshield of a motor vehicle.
  • the angling of the intermediate part serves to enable the blade to be guided into the gap formed between the windshield and the body and towards the inner adhesive bead.
  • the blade is generally made relatively thin, it must have a certain minimum thickness in the millimeter range in order to achieve sufficient mechanical strength.
  • the rough surfaces on the blade and intermediate part can also damage and scratch the body of vehicles.
  • the present invention has for its object to provide a cutting knife with the features mentioned, in which the friction against the severed adhesive layers and thus the required feed force is reduced.
  • the knife is intended to be used on motor vehicles, the risk of damage to the body and window should also be reduced.
  • At least one of the side surfaces has at least partially a coating which improves the sliding properties compared to the adhesive layer material.
  • the type of coating naturally depends on the type of adhesive layer to be cut.
  • the permanently elastic adhesive beads generally used on motor vehicle windows which consist, for example, of synthetic rubber, other coatings may be considered than for adhesive layers with other properties that are relatively hard or more plastically deformable.
  • a coating consisting of a hard material has proven to be suitable for many purposes, and in particular also for the adhesive beads of car windows.
  • nitrides carbides and possibly also oxides of some transition metals such as tungsten, hafnium and titanium are described as hard materials.
  • Such hard material coatings are extremely resistant to abrasion and can accordingly be made thin, so that the overall thickness of the blade is influenced only insignificantly. Since the coating reduces the friction of the blade against the adhesive layer to be cut and thus also the feed force to be applied, even the blade can be made thinner than the blade of conventional cutting knives, so that the blade, including the coating, remains even thinner than that of the known knives, whereby the friction and the feed force are reduced even further.
  • Titanium nitride (TiN) coating In a preferred embodiment of the invention, the Titanium nitride (TiN) coating.
  • plastics with particularly good sliding properties can also be used as a coating, for example PTFE (polytetrafluoroethylene).
  • PTFE polytetrafluoroethylene
  • the knife has an intermediate part between the shaft and the blade, it is provided in the preferred embodiment of the invention that at least the surface of the intermediate part which comes into contact with the adhesive layer during cutting likewise has a corresponding coating.
  • the surfaces of the intermediate part which come into contact with the adhesive layer or other solid parts also contribute to the friction and thus to the feed force to be applied, so that these surfaces also expediently have the coating provided according to the invention.
  • the blade is completely coated on at least one of its side surfaces.
  • the blade in which, for example, only a part of the blade penetrates an adhesive bead, it may also be sufficient if the blade is coated on only a part of a side surface.
  • blade is expediently to be coated only on one side surface or on both opposite side surfaces also depends, inter alia, on the cross-sectional shape of the blade. If, for example, one blade surface is curved outwards (convex), but the other is flat or even concave, it may be sufficient to provide only the convex curved surface of the blade with the coating in order to drastically reduce the feed force. Blades with convex sides on both sides are also preferably coated on both sides.
  • FIGS. 1a and b show a U-shaped angled knife with an essentially flat shank 2 and a flat blade 3, which are connected to one another by an intermediate part 4 essentially in a U-shape.
  • the shaft 2 has an eyelet 7 with a serrated edge 8, which enables a fixed connection to the oscillating drive of a tool, this drive executing rotary oscillations about the axis of the opening 7.
  • the blade 3 is relatively thin and has two opposite cutting edges 6 which are connected to one another at the tip of the blade via a semicircular cutting edge part 6 '. Starting from the opposite cutting edges 6, two opposite surfaces 1 of the blade 3 extend, which also act as the top and bottom of the blade 3 can be designated.
  • FIGS. 6a to c show different cross-sectional shapes, one side surface 1 (the underside) being flat and the other side being convex in FIG. 6a, while in FIG. 6b both side surfaces are convex.
  • FIG. 6c shows an embodiment in which one side surface (the upper side) is convex and has a greater curvature than the other (lower side), but which has a concave curvature.
  • friction of the concavely curved surface on the adhesive layer is largely avoided by the concave curvature alone, since this surface touches the severed adhesive layer only very weakly or not at all.
  • the coating in the cutting edge region are shown schematically in two partial images in FIG. 6a.
  • the coating can extend all the way to the cutting edge, as shown in the partial image on the left, so that when the knife is put into use, the far outer part of the coating 5 is removed, so that, depending on the hardness of the coating, after a long or short period of use it is roughly the same the course of the coating 5 indicated by dashed lines results.
  • the coating can also be designed to run thin towards the cutting edge from the outset, or, as shown in the lower part of the drawing, be made stronger towards the cutting edge.
  • FIGS. 2 and 3 appear angled in a Z-shape in the side view and the opposite cutting edges run towards one another towards the tip of the blade and are in turn connected to one another there by an essentially semicircular cutting edge tip 6 ′.
  • the knife and in particular the blade 3 are also curved in a crescent shape.
  • the blade can also have a cutting edge 6 on only one side.
  • the intermediate parts 4 can also be provided with a coating which can be identical to the coating of the surfaces 1 of the blade, but can also be different from this.
  • the intermediate part is coated on both sides and up to what point depends on the special application for which it is intended and on the method by which the coating is applied. In any case, the surfaces of the intermediate part, which touch other, fixed parts during the oscillating movements of the knife and thus contribute to friction or can also damage other parts, should be included be provided with an appropriate coating.
  • the coating material care must be taken that the material is both friction and temperature resistant and does not become detached from the carrier material when the knife is used.
  • those coating materials should preferably be selected that do not give off harmful vapors when heated due to the friction that is still present. Overheating of the knife and the coating can also be avoided by good heat dissipation by selecting a suitable knife material and a corresponding shape.
  • the knives can also have other cross-sectional shapes, e.g. flat on both sides with laterally ground cutting edges.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)
EP90111188A 1989-12-21 1990-06-13 Couteau à actionnement oscillatoire Withdrawn EP0433539A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3942230A DE3942230A1 (de) 1989-12-21 1989-12-21 Messer fuer oszillierenden antrieb
DE3942230 1989-12-21

Publications (1)

Publication Number Publication Date
EP0433539A1 true EP0433539A1 (fr) 1991-06-26

Family

ID=6395977

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90111188A Withdrawn EP0433539A1 (fr) 1989-12-21 1990-06-13 Couteau à actionnement oscillatoire

Country Status (2)

Country Link
EP (1) EP0433539A1 (fr)
DE (1) DE3942230A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1068937A1 (fr) * 1999-07-10 2001-01-17 C. & E. Fein Gmbh & Co. KG Lame de coupe pour couper des bourrelets adhésifs aux vitres
DE10164081A1 (de) * 2001-12-19 2003-07-03 C & E Fein Gmbh & Co Kg Oszillationswerkzeug mit Ausgleichsabschnitt

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19938115A1 (de) * 1999-08-12 2001-02-22 Fein C & E Schneidmesser
DE102012007489A1 (de) * 2012-03-30 2013-10-02 C. & E. Fein Gmbh Spachtel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1245099B (de) * 1961-09-28 1967-07-20 Dixon Corp Verfahren zur Herstellung von Verbundstoffen durch ein- oder zweiseitiges Beschichten von Metalloberflaechen mit Polytetrafluoraethylen
US4450205A (en) * 1979-10-26 1984-05-22 Mitsubishi Kinzoku Kabushiki Kaisha Surface-coated blade member of super hard alloy for cutting tools and process for producing same
GB2185207A (en) * 1986-01-08 1987-07-15 Gerber Scient Inc Knife blade and method for making same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1930115C3 (de) * 1966-08-20 1980-05-08 Vepa Ag, Riehen B. Basel (Schweiz) Vorrichtung zum Wärmebehandeln von Textilbahnen mit einem Flor aus druckempfindlichen Fasern
DE8423004U1 (de) * 1984-08-02 1984-10-31 C. & E. Fein Gmbh & Co, 7000 Stuttgart Schneidmesser zum durchtrennen der klebeschicht einer angeklebten scheibe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1245099B (de) * 1961-09-28 1967-07-20 Dixon Corp Verfahren zur Herstellung von Verbundstoffen durch ein- oder zweiseitiges Beschichten von Metalloberflaechen mit Polytetrafluoraethylen
US4450205A (en) * 1979-10-26 1984-05-22 Mitsubishi Kinzoku Kabushiki Kaisha Surface-coated blade member of super hard alloy for cutting tools and process for producing same
GB2185207A (en) * 1986-01-08 1987-07-15 Gerber Scient Inc Knife blade and method for making same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1068937A1 (fr) * 1999-07-10 2001-01-17 C. & E. Fein Gmbh & Co. KG Lame de coupe pour couper des bourrelets adhésifs aux vitres
US6401342B1 (en) 1999-07-10 2002-06-11 C. & E. Fein Gmbh & Co. Cutting knife for cutting cement beads of window panes
DE10164081A1 (de) * 2001-12-19 2003-07-03 C & E Fein Gmbh & Co Kg Oszillationswerkzeug mit Ausgleichsabschnitt
DE10164081B4 (de) * 2001-12-19 2012-01-26 C. & E. Fein Gmbh Oszillationswerkzeug mit Ausgleichsabschnitt

Also Published As

Publication number Publication date
DE3942230A1 (de) 1991-06-27

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