GB2189179A - Cutting blades with teeth, in particular hedge clipper knives, and a method of manufacturing them - Google Patents

Cutting blades with teeth, in particular hedge clipper knives, and a method of manufacturing them Download PDF

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Publication number
GB2189179A
GB2189179A GB08706367A GB8706367A GB2189179A GB 2189179 A GB2189179 A GB 2189179A GB 08706367 A GB08706367 A GB 08706367A GB 8706367 A GB8706367 A GB 8706367A GB 2189179 A GB2189179 A GB 2189179A
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GB
United Kingdom
Prior art keywords
teeth
hedge clipper
cutting
cutting blades
knives
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
GB08706367A
Other versions
GB2189179B (en
GB8706367D0 (en
Inventor
Marzell Chanton
Walter Linder
Urs Ruepp
Hans Schock
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.)
Scintilla AG
Original Assignee
Scintilla AG
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 Scintilla AG filed Critical Scintilla AG
Publication of GB8706367D0 publication Critical patent/GB8706367D0/en
Publication of GB2189179A publication Critical patent/GB2189179A/en
Application granted granted Critical
Publication of GB2189179B publication Critical patent/GB2189179B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
    • A01G3/04—Apparatus for trimming hedges, e.g. hedge shears
    • A01G3/047—Apparatus for trimming hedges, e.g. hedge shears portable
    • A01G3/053—Apparatus for trimming hedges, e.g. hedge shears portable motor-driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

It is proposed that cutting blades (1,2), in particular of hedge clipper knives, be provided with teeth (3) and tooth gaps (4) which fit into each other in their shape and are different in their size merely by the resulting width of a parting cut placed between them. Thus a tooth row (3) of a hedge clipper knife (1) and a tooth row (3) of an adjacent, second hedge clipper knife (2) can be cut out at the same time with one cut. It is further proposed to execute these parting cuts by means of a laser beam. Thus several hedge clipper knives can be cut out of a large, hardened steel plate without a large loss of material. As a result of the parting-cut method selected, these knives have cutting edges of greater hardness and therefore longer life. <IMAGE>

Description

SPECIFICATION Cutting blades with teeth, in particular hedge clipper knives, and a method of manufacturing them The invention is based on cutting blades according to the generic part of the main claim.
Known cutting blades of this type have unequally formed teeth and tooth gaps. Each individual tooth has to be punched out of a prefrabricated blade plate. This is an expensive method. At best, two or three teeth can be punched out at the same time. A tool with which large cutting blades, in particular long hedge clipper knives, can be punched out in one cut cannot be realized. The punch required for this would also have to be disproportionately powerful. Thus quite a lot of scrap material results when the teeth are punched out, whch likewise makes manufacture expensive.
In contrast, the cutting blades according to the invention with the characterizing features of the main claim have the advantage of optimum utilization of material. Scrap results practically only in the attachment area of the blades outside the area of the teeth.
Advantageous further developments and improvements of the cutting blades specified in the main claim are possible by the measures stated in the subclaims. Especially advantageous is the method of manufacturing these blades by executing the parting cut by means of a laser beam. This makes manufacture from hardened steel plate possible and cutting edges result with greater hardness or longer life. In addition, even small radii and sharp corner cuts can thereby be achieved. Finally, shorter overall machining times can be achieved.
An exemplary embodiment of the subject of the invention is shown in the drawing and described in greater detail in the following description. The figure shows a hedge clipper knife in a plan view and partly a second hedge clipper knife.
Description of the exemplary embodiment A hedge clipper knife 1 and a second hedge clipper knife 2 are equipped with teeth 3 which fit into the respective tooth gaps 4 such that they differ merely by the width of a parting cut placed between them. According to the invention, the hedge clipper knives 1 and 2 and further hedge clipper knives (not shown) adjacent to them are cut out of a hardened steel plate by means of a laser beam such that, with a parting cut, a tooth row (at 1) and an adjacent second tooth row (at 2) displaced by half a tooth spacing are produced in each case. Since for technical reasons the attachment area 5 of the hedge clipper knives 1 and 2 cannot usually be formed with contours matching one another, the hedge clipper knives are cut out such that the attachment ends are in each case allocated to the opposite ends of the adjacent hedge clipper knives.In this way, it is possible to cut out of a large hardened plate, without a substantial material loss, several hedge clipper knives lying side by side. Moreover, as a result of the cutting method selected, the teeth 3 receive cutting edges of greater hardness and therefore longer life.
1. Cutting blades with teeth, in particular hedge clipper knives, characterized in that the shape of the teeth (3) and the shape of the tooth gaps (4) correspond to one another, and the teeth (3) are narrower than the tooth gaps (4) by twice the cutting width of a parting cut for cutting out the tooth rows, so that, with one parting cut, two identical tooth rows are produced which mesh during the cutting operation.
2. Method of manufacturing cutting blades according to Claim 1, characterized in that the parting cut is executed by means of a laser beam.
3. Method according to Claim 2, characterized in that the blades (1, 2) are cut out of hardened steel plate.
4. A method of manufacturing cutting blades substantially as herein described with reference to the accompanying drawing.
5. Cutting blades manufactured by a method as claimed in any of the preceding claims.
6. A cutting blade substantially as herein described with reference to the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Cutting blades with teeth, in particular hedge clipper knives, and a method of manufacturing them The invention is based on cutting blades according to the generic part of the main claim. Known cutting blades of this type have unequally formed teeth and tooth gaps. Each individual tooth has to be punched out of a prefrabricated blade plate. This is an expensive method. At best, two or three teeth can be punched out at the same time. A tool with which large cutting blades, in particular long hedge clipper knives, can be punched out in one cut cannot be realized. The punch required for this would also have to be disproportionately powerful. Thus quite a lot of scrap material results when the teeth are punched out, whch likewise makes manufacture expensive. In contrast, the cutting blades according to the invention with the characterizing features of the main claim have the advantage of optimum utilization of material. Scrap results practically only in the attachment area of the blades outside the area of the teeth. Advantageous further developments and improvements of the cutting blades specified in the main claim are possible by the measures stated in the subclaims. Especially advantageous is the method of manufacturing these blades by executing the parting cut by means of a laser beam. This makes manufacture from hardened steel plate possible and cutting edges result with greater hardness or longer life. In addition, even small radii and sharp corner cuts can thereby be achieved. Finally, shorter overall machining times can be achieved. An exemplary embodiment of the subject of the invention is shown in the drawing and described in greater detail in the following description. The figure shows a hedge clipper knife in a plan view and partly a second hedge clipper knife. Description of the exemplary embodiment A hedge clipper knife 1 and a second hedge clipper knife 2 are equipped with teeth 3 which fit into the respective tooth gaps 4 such that they differ merely by the width of a parting cut placed between them. According to the invention, the hedge clipper knives 1 and 2 and further hedge clipper knives (not shown) adjacent to them are cut out of a hardened steel plate by means of a laser beam such that, with a parting cut, a tooth row (at 1) and an adjacent second tooth row (at 2) displaced by half a tooth spacing are produced in each case. Since for technical reasons the attachment area 5 of the hedge clipper knives 1 and 2 cannot usually be formed with contours matching one another, the hedge clipper knives are cut out such that the attachment ends are in each case allocated to the opposite ends of the adjacent hedge clipper knives.In this way, it is possible to cut out of a large hardened plate, without a substantial material loss, several hedge clipper knives lying side by side. Moreover, as a result of the cutting method selected, the teeth 3 receive cutting edges of greater hardness and therefore longer life. CLAIMS
1. Cutting blades with teeth, in particular hedge clipper knives, characterized in that the shape of the teeth (3) and the shape of the tooth gaps (4) correspond to one another, and the teeth (3) are narrower than the tooth gaps (4) by twice the cutting width of a parting cut for cutting out the tooth rows, so that, with one parting cut, two identical tooth rows are produced which mesh during the cutting operation.
2. Method of manufacturing cutting blades according to Claim 1, characterized in that the parting cut is executed by means of a laser beam.
3. Method according to Claim 2, characterized in that the blades (1, 2) are cut out of hardened steel plate.
4. A method of manufacturing cutting blades substantially as herein described with reference to the accompanying drawing.
5. Cutting blades manufactured by a method as claimed in any of the preceding claims.
6. A cutting blade substantially as herein described with reference to the accompanying drawing.
GB8706367A 1986-04-17 1987-03-18 A method of manufacturing cutting blades with teeth and cutting blades so manufactured Expired - Fee Related GB2189179B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3612915A DE3612915C2 (en) 1986-04-17 1986-04-17 Hedge trimmer knife

Publications (3)

Publication Number Publication Date
GB8706367D0 GB8706367D0 (en) 1987-04-23
GB2189179A true GB2189179A (en) 1987-10-21
GB2189179B GB2189179B (en) 1990-03-14

Family

ID=6298865

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8706367A Expired - Fee Related GB2189179B (en) 1986-04-17 1987-03-18 A method of manufacturing cutting blades with teeth and cutting blades so manufactured

Country Status (4)

Country Link
CH (1) CH672905A5 (en)
DE (1) DE3612915C2 (en)
GB (1) GB2189179B (en)
IT (1) IT1203468B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0398415A1 (en) * 1989-05-16 1990-11-22 SAVIO S.p.A. Method for forming combs for application to suction nozzles for seizing the end of yarns wound in packages, and the improved combs obtained
US5249752A (en) * 1989-05-16 1993-10-05 Savio S.P.A. Combs for application to suction nozzles for seizing the end of yarns wound in packages
WO1995021521A1 (en) * 1994-02-11 1995-08-17 Valex S.P.A. Cutting device for gardening and horticulture, and method for producing it
US5987753A (en) * 1997-05-27 1999-11-23 Kioritz Corporation Hand-held power working machine
GB2371771A (en) * 2001-02-01 2002-08-07 Black & Decker Inc Hedge trimmer blade and method of manufacture thereof
EP1642669A2 (en) * 2004-10-01 2006-04-05 GARDENA Manufacturing GmbH Hedge trimmer
WO2007090552A1 (en) * 2006-02-08 2007-08-16 Ab Skf Method of producing rings and an intermediate ring
WO2011042058A1 (en) * 2009-10-08 2011-04-14 Tomologic Ab Controlling rules and variables for cutting
CN103608145A (en) * 2011-04-07 2014-02-26 特摩劳吉克公司 Method of, system and computer program for machine cutting several parts of a piece of material using controlling rules and variables for cutting
FR3006930A1 (en) * 2013-06-17 2014-12-19 Peugeot Citroen Automobiles Sa METHOD FOR MANUFACTURING TOOLS FOR MAINTAINING A BODY PIECE SUCH AS THE BONNET ON THE BODY OF A VEHICLE DURING THE PAINTING PROCESS

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10045229A1 (en) * 2000-09-13 2002-03-28 Bayerische Motoren Werke Ag Brake disc component manufacturing method uses laser cutting beam for separating component from sheet or rod material
DE102007005182B3 (en) * 2007-01-29 2008-07-31 Mogatec Moderne Gartentechnik Gmbh Case-hardened drive pins fastening method, involves attaching counter bores extending shearing blades at side into through-holes by laser cuttings, and fastening drive pins by material flow resulting from associated riveted bolts
DE102023202454A1 (en) 2023-03-20 2024-09-26 Robert Bosch Gesellschaft mit beschränkter Haftung Process for producing cutting and/or saw blades, cutting and/or saw blade, cutting and/or sawing tool and hedge trimmer
EP4484583A1 (en) * 2023-06-26 2025-01-01 Husqvarna AB A method of manufacturing blades of a cutting device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB215203A (en) * 1923-06-29 1924-05-08 Jack White A cutting and sawing instrument for domestic use
GB498694A (en) * 1937-07-24 1939-01-12 Robert Robertson Combined rake and cutter for grass and other vegetation
GB611996A (en) * 1942-06-12 1948-11-05 Luigi Castoldi Improvements in or relating to mowing machines
GB649138A (en) * 1948-02-09 1951-01-17 Pieter Van Der Heijden Improvements in and relating to shears for making cuts in dough for bread baked in tins
GB1228261A (en) * 1968-07-12 1971-04-15
US4027390A (en) * 1974-11-01 1977-06-07 Jarvis Products Corporation Saw blade
GB2142515A (en) * 1983-06-27 1985-01-23 Eric William Boor Grass cutter machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3538693A (en) * 1969-08-11 1970-11-10 Sigvard Hast Lawn-mowers
DE2164548B2 (en) * 1971-12-24 1973-12-20 Eisenwerk Milspe Der Schaffgotsch Bergwerksgesellschaft, 5828 Ennepetalmilspe Device for cutting hedges
IT1148370B (en) * 1981-07-17 1986-12-03 Fuji Tool & Die THREE-DIMENSIONAL LASER CUTTING SYSTEM WITH THE REPRODUCTION METHOD
FR2568744A3 (en) * 1984-08-08 1986-02-14 Berseille Fernand Hand weeder
DE3432681A1 (en) * 1984-09-05 1986-03-13 Atz-Maria 8751 Mespelbrunn Denger Method for producing marquetry

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB215203A (en) * 1923-06-29 1924-05-08 Jack White A cutting and sawing instrument for domestic use
GB498694A (en) * 1937-07-24 1939-01-12 Robert Robertson Combined rake and cutter for grass and other vegetation
GB611996A (en) * 1942-06-12 1948-11-05 Luigi Castoldi Improvements in or relating to mowing machines
GB649138A (en) * 1948-02-09 1951-01-17 Pieter Van Der Heijden Improvements in and relating to shears for making cuts in dough for bread baked in tins
GB1228261A (en) * 1968-07-12 1971-04-15
US4027390A (en) * 1974-11-01 1977-06-07 Jarvis Products Corporation Saw blade
GB2142515A (en) * 1983-06-27 1985-01-23 Eric William Boor Grass cutter machine

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0398415A1 (en) * 1989-05-16 1990-11-22 SAVIO S.p.A. Method for forming combs for application to suction nozzles for seizing the end of yarns wound in packages, and the improved combs obtained
US5249752A (en) * 1989-05-16 1993-10-05 Savio S.P.A. Combs for application to suction nozzles for seizing the end of yarns wound in packages
WO1995021521A1 (en) * 1994-02-11 1995-08-17 Valex S.P.A. Cutting device for gardening and horticulture, and method for producing it
US5987753A (en) * 1997-05-27 1999-11-23 Kioritz Corporation Hand-held power working machine
GB2371771A (en) * 2001-02-01 2002-08-07 Black & Decker Inc Hedge trimmer blade and method of manufacture thereof
EP1642669A3 (en) * 2004-10-01 2007-02-21 GARDENA Manufacturing GmbH Hedge trimmer
EP1642669A2 (en) * 2004-10-01 2006-04-05 GARDENA Manufacturing GmbH Hedge trimmer
WO2007090552A1 (en) * 2006-02-08 2007-08-16 Ab Skf Method of producing rings and an intermediate ring
WO2011042058A1 (en) * 2009-10-08 2011-04-14 Tomologic Ab Controlling rules and variables for cutting
CN102574244A (en) * 2009-10-08 2012-07-11 特摩劳吉克公司 Controlling rules and variables for cutting
CN102574244B (en) * 2009-10-08 2014-10-22 特摩劳吉克公司 Controlling rules and variables for cutting
US9108272B2 (en) 2009-10-08 2015-08-18 Tomologic Ab Controlling rules and variables for cutting
CN103608145A (en) * 2011-04-07 2014-02-26 特摩劳吉克公司 Method of, system and computer program for machine cutting several parts of a piece of material using controlling rules and variables for cutting
CN103608145B (en) * 2011-04-07 2017-06-13 特摩劳吉克公司 Method, system and the computer program of multiple workpiece are cut in a block of material using cut-sytle pollination rule and variable
FR3006930A1 (en) * 2013-06-17 2014-12-19 Peugeot Citroen Automobiles Sa METHOD FOR MANUFACTURING TOOLS FOR MAINTAINING A BODY PIECE SUCH AS THE BONNET ON THE BODY OF A VEHICLE DURING THE PAINTING PROCESS

Also Published As

Publication number Publication date
GB2189179B (en) 1990-03-14
IT8720063A0 (en) 1987-04-10
DE3612915C2 (en) 1996-10-02
IT1203468B (en) 1989-02-15
CH672905A5 (en) 1990-01-15
GB8706367D0 (en) 1987-04-23
DE3612915A1 (en) 1987-10-22

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Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20060318