EP3659708A1 - Outil pourvu d'un porte-outil pour broyeurs / fraiseuses - Google Patents

Outil pourvu d'un porte-outil pour broyeurs / fraiseuses Download PDF

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Publication number
EP3659708A1
EP3659708A1 EP19211454.4A EP19211454A EP3659708A1 EP 3659708 A1 EP3659708 A1 EP 3659708A1 EP 19211454 A EP19211454 A EP 19211454A EP 3659708 A1 EP3659708 A1 EP 3659708A1
Authority
EP
European Patent Office
Prior art keywords
tool
seat
point
inclination
opposite
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Withdrawn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
EP19211454.4A
Other languages
German (de)
English (en)
Inventor
Lorenz Seppi
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.)
Seppi M SpA
Original Assignee
Seppi M 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 Seppi M SpA filed Critical Seppi M SpA
Publication of EP3659708A1 publication Critical patent/EP3659708A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
    • B02C18/145—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers with knives spaced axially and circumferentially on the periphery of a cylindrical rotor unit

Definitions

  • the present invention relates to a tool with a tool holder, and the tool which is arranged in the seat of the tool holder according to the preamble of claim 1.
  • Tools of this type are subject to high wear and tear, which tend to break and deform the tool itself, and therefore a tool change is often required.
  • the first type has a support surface on which the tool is fixed with its surface opposite the cutting direction, for example by means of a screw.
  • This type of tool holder is from, for example DE 2013 110289 A1 known.
  • This type of tool holder has the problem that the tool is exposed with its entire body in the cutting direction in the event of impact and damage.
  • a second type of tool holder has a seat, in which the tool from a Cutting surface arranged first surface and a second surface on which the tool is fixed with its surface opposite the cutting direction, is used.
  • a tool holder of this type is from, for example EP 1 693 110 known. With this type of seat, the tool is inserted into the seat lying on the underside of the seat and then fixed with a screw. There is a seat between the tool and the front and back for inserting the tool.
  • the tool change is often complex because the tool is geometrically coupled to the tool storage seat and / or is connected to the seat through use.
  • a tool for milling and crushing and the like is known, which is arranged in a tool holder for a tool holder rotor rotatable about the axis of the rotor and which is accommodated in a seat of the tool holder arranged on the tool holder rotor, formed by a first surface arranged in the cutting direction and a second Area on which the Tool is fixed with its surface opposite to the cutting direction, and wherein the tool has a body which has an end face in the direction of rotation of the rotor and a rear surface relative to the front surface and wherein the rear surface is inclined from 2 ° to 10 ° with respect to the front surface and the tool is latched / locked and carried between the surface in the cutting direction of the seat and the surface opposite to the cutting direction, whereby a play between the tool and the underside of the seat is omitted.
  • the object of the present invention is to provide a tool which can be changed quickly without the use of special tools and which ensures a connection to the seat while the tool is working.
  • a tool for milling and the like having a tool holder with a body which has a front surface in the direction of rotation / working direction and a rear surface opposite the front surface which can be coupled to a surface of the seat, and the body of the tool has a through connection hole or hole for attachment to a seat of a tool holder rotor by means of a screw.
  • the tool has a base that can be inserted into the seat of a tool holder rotor.
  • the rear wall in the upper part of the tool runs essentially parallel to the opposite surface of the seat, and the rear surface has a change in inclination in which the tool has a width R at the point / point of the change in inclination and the insertion depth of the tool, where A is A ⁇ 0.95 R and in which each point of the lower rear surface of the tool has a distance R1 smaller than R1 ⁇ 0.95 R after changing the inclination, where R1 is the distance between a point on the lower rear surface and has an orthogonal line to R that passes through this point A1.
  • A1 is the point at the center of the width of the tool on the front of the tool in the direction of rotation opposite to the variation point of the inclination.
  • the tool advantageously has a base which can be inserted into a seat of a tool holder rotor, the insertable base preferably having a height of less than 30 mm and the lower surface preferably having a width of less than 25 mm, the rear surface having a Inclination.
  • This inclination which is inclined downwards in the direction of rotation of the tool, makes it easier to turn the tool and to pull it out of the seat of a tool holder rotor.
  • the underside of the tool forms a virtual straight line which connects the starting point of the rear surface of the tool base in the cutting direction, ie the point at which the inclination varies and the end point of the rear surface of the tool base in the cutting direction. ie the point at which it intersects the lower surface of the tool and this straight line forms a ⁇ angle of at least 110 ° with the underside of the tool.
  • This inclined rear surface extends only along the part of the tool that can be inserted into the tool holder seat.
  • the underside of the tool advantageously has a width of less than 60% of the average width of the tool.
  • the variation (change) of the inclination of the tool advantageously corresponds to the height of the rear surface of the front wall in the direction of rotation of the tool seat.
  • the point of contact between the rear surface of the front wall in the direction of rotation of the tool seat and the tool is advantageously point A1.
  • it is then fixed with a screw. In this way, the tool cannot move in the cutting direction. Since there are no movements, the tool body is less worn. Seat wear is also reduced.
  • the screw is loosened, which is aligned against the direction of rotation, in which the tool is fixed to the seat and runs through the second surface of the seat. Then the tool head is pressed against the working direction. In this way, the tool is released from the seat, since the inclined rear surface allows the tool to be rotated and thus easier to pull out.
  • the point A1 lies on the wall of the tool seat and acts as a fulcrum for turning the tool.
  • the tool according to the invention advantageously has a wedge shape, the lower part opposite the cutting element / cutting edge having an inclined rear surface.
  • the angle ⁇ is advantageously less than 45 °, the rear wall in the upper part running essentially parallel to the opposite surface of the seat and the lower part of the tool forming an angle ( ⁇ ) to the rear wall of the seat.
  • the tool is shaped such that the cutting element is the outermost part of the tool with respect to the seat.
  • reference numeral 1 denotes a tool according to the invention.
  • This tool 1 consists of a tool body with a front side of the tool in the cutting direction 2a, a rear side of the tool 2b and an underside of the tool 2c.
  • a cutting element 6 is attached to the upper part of the tool in the upper part of the tool.
  • the tool is attached to a seat by means of a screw via a screw seat 10
  • Tool holder rotor attached, such as on a seat of a tool holder rotor, which has a first surface arranged in the cutting direction 7 and a second surface, to which the tool is attached with its surface opposite to the cutting direction 7.
  • the base of the tool 2 is inserted into the holder of the tool holder.
  • the tool is then screwed to the seat through a through hole 10 by means of a screw.
  • the screw is unscrewed and then an attempt is made to turn the tool 1, which is seated both by means of a rear step on the seat and with its base in the tool holder rotor seat, not shown.
  • the rear wall in the upper part 2b of the tool is essentially parallel to the opposite surface of the seat 100 and the rear surface has a variation in the inclination / change.
  • the tool 1 has a width R at the point of variation.
  • the insertion depth of the tool A is A ⁇ 0.95 R, and in each point of the lower rear surface 5 of the tool 1 after changing the inclination, a distance R1 is smaller than R1 ⁇ 0.95 R, in which R1 the distance between one Point on the lower back surface and an orthogonal line to R that passes through point A1.
  • the tool advantageously has the point at which it cuts the underside of the tool 2c and this straight line forms a ⁇ (beta) angle of at least 110 ° with the underside of the tool 2c.
  • the height of the base of the tool A is less than 30 mm, the base height of the tool A meaning the part of the tool arranged between the two surfaces of the seat.
  • the underside advantageously has a Width less than 25 mm.
  • the lower part of the tool rear surface in the cutting direction 7 can be inclined in a straight line or have a curvature.
  • Fig. 3a shows a front view of a tool 1 according to the invention, which is inserted into a tool holder 100.
  • the tool holder 100 has an opening or bore 111 through which the tool 1 is fixed by means of a screw, not shown, through the bore 10 on the tool holder.
  • the tool opening has both a wall in the direction of rotation 110 and a wall 112 on which the tool 1 is supported by its rear surface 2B.
  • the wall 112 of the tool holder seat forms an ⁇ angle with the wall 5 of the tool.
  • This ⁇ angle can vary between 10 ° and advantageously 45 °.
  • At least an angle of 10 ° is required in order to be able to pull the tool out by a forward rotary movement, ie in the cutting direction 7. This movement makes it easier to remove the tool from the seat. This movement can be achieved, for example, by hitting the upper rear part of the tool with a hammer.
  • the hammer is used to unlock the tool, which can also be connected to the seat due to the pressure during machine operation due to use. After the impact, the tool can be removed more easily.
  • this problem only occurs with tools used in two-walled seats, i. H. a first wall in the direction of rotation 7 and a second rear wall 112.
  • the tool can have side walls that protrude from the seat and extend laterally around the seat. This should ensure a better seal and also protect the seat. This variant is not shown in the accompanying figures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Milling Processes (AREA)
  • Jigs For Machine Tools (AREA)
EP19211454.4A 2018-11-27 2019-11-26 Outil pourvu d'un porte-outil pour broyeurs / fraiseuses Withdrawn EP3659708A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000010607A IT201800010607A1 (it) 2018-11-27 2018-11-27 Utensile per un portautensile per trinciatrici/fresatrici

Publications (1)

Publication Number Publication Date
EP3659708A1 true EP3659708A1 (fr) 2020-06-03

Family

ID=65767143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19211454.4A Withdrawn EP3659708A1 (fr) 2018-11-27 2019-11-26 Outil pourvu d'un porte-outil pour broyeurs / fraiseuses

Country Status (2)

Country Link
EP (1) EP3659708A1 (fr)
IT (1) IT201800010607A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1693110A1 (fr) 2005-02-22 2006-08-23 Seppi M. S.R.L. Outil et porteur d'outil pour une cultivateur pour le sol
DE102013110289A1 (de) 2013-09-18 2015-03-19 KingKong-Tools GmbH & Co. KG Schneidwerkzeug für eine Schredder-, Mulchmaschine oder dergleichen
WO2018054733A1 (fr) 2016-09-21 2018-03-29 Seppi M. Spa Ag Outil sur un porte-outil et destiné au fraisage et au broyage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1693110A1 (fr) 2005-02-22 2006-08-23 Seppi M. S.R.L. Outil et porteur d'outil pour une cultivateur pour le sol
DE102013110289A1 (de) 2013-09-18 2015-03-19 KingKong-Tools GmbH & Co. KG Schneidwerkzeug für eine Schredder-, Mulchmaschine oder dergleichen
WO2018054733A1 (fr) 2016-09-21 2018-03-29 Seppi M. Spa Ag Outil sur un porte-outil et destiné au fraisage et au broyage

Also Published As

Publication number Publication date
IT201800010607A1 (it) 2020-05-27

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