EP0432063A1 - Machine à affûter les couteaux à suspension flottante - Google Patents

Machine à affûter les couteaux à suspension flottante Download PDF

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Publication number
EP0432063A1
EP0432063A1 EP90420521A EP90420521A EP0432063A1 EP 0432063 A1 EP0432063 A1 EP 0432063A1 EP 90420521 A EP90420521 A EP 90420521A EP 90420521 A EP90420521 A EP 90420521A EP 0432063 A1 EP0432063 A1 EP 0432063A1
Authority
EP
European Patent Office
Prior art keywords
grinding wheel
sharpening
carriage
knife
main frame
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Withdrawn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
EP90420521A
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German (de)
English (en)
French (fr)
Inventor
Lucien Durand
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.)
Durand International SAS
Original Assignee
Durand International SAS
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 Durand International SAS filed Critical Durand International SAS
Publication of EP0432063A1 publication Critical patent/EP0432063A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/36—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of cutting blades

Definitions

  • the present invention relates to the general technical field of machines intended for localized sharpening or resharpening of blunt parts, with a view to reconstructing a cutting edge.
  • the invention relates, more particularly, but not exclusively, to machines intended for sharpening double or matched knives, used on machines for slicing pigs.
  • Pork slitting machines using the principle of the longintudinal slit of pigs, use either a rotary cutting member, such as a disc, or a cutting member composed of two knives arranged substantially parallel to each other. 'other and driven by an alternative cutting movement along a generally vertical cutting path.
  • a rotary cutting member such as a disc
  • a cutting member composed of two knives arranged substantially parallel to each other. 'other and driven by an alternative cutting movement along a generally vertical cutting path.
  • Maintaining a good quality of cut of the carcass, over a prolonged period of use of such machines, is essential, due, in particular, to its impact on the external appearance of the carcass, which determines, in part, its commercial value.
  • the preservation over time of a good cutting quality is linked, on the one hand, to the cutting machine itself and its adequate adjustment and, on the other hand, to the maintenance, on the cutting knives, of an edge having a cutting wire with a suitable profile.
  • the object of the present invention is therefore to provide a knife sharpening machine which does not have the drawbacks of traditional techniques and which is capable of reducing the arduousness and the duration of the sharpening operation, while ensuring sharpening precise of the knife, whatever its initial surface condition.
  • Another object of the invention is to provide a sharpening machine in which the knife sharpening operation is carried out automatically by limiting manual operations, while facilitating the positioning and positioning of the object to sharpen.
  • Another object of the invention is to provide a sharpening machine in which the two faces of the same knife are sharpened with precision, at the same sharpening angle kept constant in the sharpening plane.
  • Fig. 1 shows a sectional view, taken along line II of FIG. 2 , of a sharpening device according to the invention.
  • Fig. 2 shows a top view of a sharpening device according to the invention.
  • Fig. 3 shows, in a cross-sectional view taken along line III-III of FIG. 2 , a sharpening device according to the invention.
  • Fig. 4 shows an alternative embodiment according to the invention, according to a cross section of the device.
  • Fig. 5 shows the alternative embodiment of FIG. 4 , according to a cut made along the line VV .
  • Fig. 6 illustrates a detail of embodiment according to a section made along the line VI-VI of FIG. 4 .
  • the knife sharpening device comprises a main frame 1 resting on the ground 2 by means of adjustable feet 3 intended to ensure correct positioning of the frame 1 .
  • the main frame 1 comprises an upper part defining a table 4 comprising at least one flat part, as well as an inclined part 5 forming an elevation relative to the flat part 4 .
  • the main frame 1 also includes a series of side walls 6 delimiting the external outline of the frame. It is obvious that different configurations of the main frame can be envisaged without departing from the scope of the invention, the main frame can even be secured to another appliance, or even to a wall or a partition.
  • a slide 7 having a preferably cylindrical cross section, is fixed, by any suitable means, to the table 4 .
  • the slide 7 preferably extends along an external edge of the table, so that its longitudinal axis xx ′ is parallel and in the same direction as one extreme end edges of the table 4 , so as to define a preferably rectilinear slide.
  • a mobile carriage 8 is mounted on the slide 7 , by means of a sliding sheath 11 conforming, at least partially, to the external contour of the slide 7 , in order to ensure sliding and alternative movement of the mobile carriage 8 on the slide 7 along the axis xx ′ .
  • Stop means are advantageously provided on the slide 7 or on either side of said slide, in order to give two stop positions limiting the reciprocating movement of the carriage along the axis xx ′ .
  • the mobile carriage 8 comprises a plate 12 surmounting a support block 13 in which the sliding sheath 11 is inserted.
  • the plate 12 is arranged, relative to the table 4 , so as to partially cover it and its general shape can be assimilated to a rectangular parallelepiped whose sides are, respectively, parallel to the external edges of the table 4 .
  • a recess 15 is provided in the plate 12 to reduce the overall width of the plate 12 over a distance less than the length all of the plate, taken in a direction parallel to the sliding axis xx ′ .
  • the plate 12 also includes, in the vicinity of the end 14 , a rolling roller 16 , integral with the lower face 17 of the plate 12 and preferably arranged in a central position of the plate 12 .
  • the roller 16 is provided with a drive member 18 , of the electric motor type for example, secured to the plate 12 .
  • Immobilization means 22 of a knife 23 to be sharpened are arranged on the upper face 21 of the plate 12 .
  • the immobilization means 22 preferably three in number, are arranged on the upper face 21 , in a configuration constituting an immobilization triangle and consist of an arm 24 extending above and at a distance from the plate 12 , said arm 24 being mounted movable about an axis 25 parallel and in the same direction as the axis xx ′ .
  • the arm 24 is, advantageously, consisting of two half-arms having two parallel portions on which is mounted, with the possibility of sliding along the two half-arms, a blocking member 26 intended to block, by compression, the knife 23 on the upper face 21 of the plate 12 .
  • the immobilization means 22 are usefully supplemented by a control lever 27 ensuring the release and / or the locking in position of the arm 24 around its axis of rotation materialized by the axis 25 .
  • a control lever 27 ensuring the release and / or the locking in position of the arm 24 around its axis of rotation materialized by the axis 25 .
  • the mounting of the carriage 8 on the main frame 1 is advantageously supplemented by an attachment of the carriage 8 on the slide 7 allowing free rotation of the carriage 8 around the axis xx ′ , when the slide 7 has a cylindrical section, as this is illustrated in fig. 1 to 3 . If the slide 7 has a non-cylindrical and, for example, square section, the rotation of the carriage 8 around the axis xx ′ of the slide 7 can be obtained by interposing an intermediate piece, of the bearing type.
  • the roller 16 is supported by a rule 31 , integral with the table 4 by any known technical means and in particular, by screwing, said rule extending parallel to the axis xx ′ and in the same direction and having an upper face 32 which constitutes a raceway for the roller 16 .
  • the rule 31 is arranged on the table 4 , along a rotary grinding wheel 33 , so that a portion of the raceway 32 extends in line with the sharpening member of the grinding wheel 33 .
  • the height H of the raceway 32 determines the profile of the raceway 32 and defines the position of the plate 12 around its pivot axis xx ′ and thereby defines , the position of the knife 23 relative to the sharpening member of the rotary grinding wheel 33 . Consequently, rule 31 will present a variable height H according to the length portion considered and defining the height of the raceway.
  • the portion of the raceway 32 extending in line with the sharpening member of the grinding wheel 33 , has a height less than the other portions of the rule 31 .
  • raceway 32 can have variable increasing, decreasing or even constant heights, outside the previously defined lowering zone, to accommodate different practical situations.
  • the rotary grinding wheel 33 whose sharpening member has a shape similar to a circular ring, is provided with a protective casing 33 a and is preferably arranged in a central portion of the frame 1 to which it is connected by through a chassis 34 , articulated on the main frame 1 around a parallel axis 35 , in the same direction as the axis xx ′ and extending, preferably, at a level below the carriage 8 and under this latest.
  • the rotary grinding wheel 33 is mounted, with respect to the vertical direction, with an inclination whose angulation is given by the angle formed by the vertical direction and the axis of symmetry of the grinding wheel or the circular ring. .
  • This arrangement makes it possible to define, with respect to the upper face 21 of the plate 12 , a sharpening plane considered to be constant.
  • An elastic means preferably at least one helical spring 36 , is interposed between the articulated frame 34 and the main frame 1 , so as to produce an elastic suspension conferring a possibility of controlled and elastic rotation of the rotary grinding wheel 33 around the axis 35 .
  • the suspension system can, of course, be produced by interposing the spring or springs 36 in different directions and fixing them on supports arranged in various locations on the chassis 34 or on the frame 1 , without departing from the framework of the invention.
  • the spring 36 is a tension spring whose sensitivity can be adjusted by any known means of tensioning.
  • the rotary grinding wheel 33 is provided with conventional sharpening members, not forming part of the scope of the invention, and its drive is also ensured, in known manner, by a motor assembly which can be electric for example.
  • Figs. 4 and 5 illustrate an alternative embodiment according to the invention, in which the elastic suspension of the grinding wheel 33 is produced by mounting a compression spring 40 ( fig. 5 ) against a wing 41 of the articulated frame 34 supporting the grinding wheel 33 .
  • the spring 40 is held prestressed by an assembly consisting of a compression plate 42 and an adjustment screw 43 of axis coinciding with the longitudinal axis of symmetry of the spring 40 passing through, on one side, the plate 42 and, on the other side, the main frame 1 and, for example, the table 4 .
  • the adjustment screw 43 is held in place, at one end, by a nut 45 bearing against the plate 42 and, at the other end, by an adjustment wheel 46 bearing against a stop 47 .
  • This assembly thus makes it possible, by simple rotation in one direction or the other of the wheel 46 , to adjust the compression of the spring 40 and thus to adjust, precisely and continuously, the floating suspension of the grinding wheel 33 . Thanks to this arrangement, it is possible to obtain, by choosing a spring 40 of large diameter, a very fine adjustment of the sensitivity of the elastic mounting leading to a high sensitivity of erasure of the grinding wheel 33 in the event of a heterogeneous surface to be sharpened. . This avoids the harmful phenomena of burning the object to be sharpened.
  • a vibration damping device 50 comprising, for example, a damping spring 51 , interposed, on the one hand, between an arm shock absorber 52 secured, by an axis 53 , to a viscostatic damping member 54 and, for example, on the other hand, the frame 1 of the sharpening device.
  • the user moves himself, or by means of a drive member, the movable carriage 8 in one of the two extreme abutment positions of the carriage 8 along its sliding axis xx ′ . It can be considered that one of these positions is illustrated by the position in solid lines of the carriage 8 shown in FIG. 2 .
  • the user by actuating the three levers 27 controlling the immobilizing means 22 , will position the sharpening knife 231 on the upper face 21 of the plate 12 .
  • the knife 23 is then immobilized and locked in position according to the chosen sharpening angle, which can moreover be determined using a set mounted on the main frame 1 .
  • each blocking member 26 can immobilize and properly lock knives 23 of varying shapes and dimensions.
  • the user determines the depth of the sharpening carried out by the grinding wheel 33 by controlling the positioning of the knife 23 within the limits defined by the recess 15 .
  • the user controls the movement of the carriage 8 according to the arrow f2 , said movement leading the carriage 8 and the knife which it carries progressively through the sharpening plane defined by the grinding wheel and the knife and this at a predetermined angle.
  • the surface to be sharpened includes bosses, nicks or the like, leading to an increase in the pressure of the knife on the grinding wheel 33 , the latter is instantly erased, as soon as the pressure exerted is greater than the sensitivity force of the suspension elastic.
  • a simple visual inspection of the surface condition of the knife, prior to sharpening allows the operator to set the desired degree of erasure sensitivity himself. The operator can repeat the sharpening until the grinding wheel 33 is no longer moved during the passage of the knife, thus indicating a perfect cutting profile, obtained without burning.
  • the mobile carriage 8 is in an extreme stop position, located to the right of the rotary grinding wheel 33 , as illustrated in FIG. 2 and the user can then, if he wishes to perform the sharpening of the other face of the knife 23 , unlock the latter, then position it in the reverse position illustrated by the reference 232 in FIG. 2 .
  • the second face of the knife 23 will therefore also be sharpened at a predetermined angle identical or not to that of its other face.
  • the knives 233 and 234 illustrate other sharpening positions for the knives 23 .
  • the spring or springs 36 or 40 keep the rotary grinding wheel 33 in elastic abutment against the knife 23 .
  • a cursor 60 secured to the carriage 8 and, preferably, to the underside of the plate 12 , said cursor being mounted movably and freely sliding on said plate 12 in the defined directions. by the axis xx ′ .
  • the cursor 60 has, in a longitudinal section, a profile having two end wings 61 a and 61 b in inverted "U" , bordering the central core 62 , which defines a rolling surface for a roller 63 , integral with the articulated frame 34 supporting the grinding wheel 33 .
  • the two wings 61 a and 61 b surround the roller 63 and serve as a stop for this last during the sliding of the carriage 8 in one or the other of the directions f3 or f4 defined by the sliding axis xx ′ .
  • the profile of the central core 62 comprises a first section 62 a , called the clearance section, adjacent to the wing 61 a and, preferably, inclined starting from the wing 61 a gradually towards the inside of the "U" profile. " of cursor 60 .
  • the profile of the central core 62 ends, in the direction of the wing 61 b , by a second section 62 b , called the rest section, forming a recess relative to the rolling surface defined by the first section 62 a .
  • the positioning and the relative dimensioning of the cursor 60 and the roller 63 are chosen such that, when the rolling roller 16 is supported on the rule 31 , the roller 63 sits in the recess defined by the second section 62 b , without contact with the cursor 60 , while the surface of the first section 61 b is intended to come into contact with the roller 63 and to provide, by reaction, a force directed in the direction f5 tending to push the roller 63 according to this same direction.
  • the cursor 60 has no action, since the roller 63 is simply in abutment against the wing 61 b , as shown in FIG. 6 .
  • the cursor 60 is locked in position against the roller 63 while the carriage moves in the direction f3 and that the sharpening takes place, the grinding wheel 33 being, moreover, in flexible elastic support, since the roller 63 is not not requested by the cursor.
  • the knife sharpening device allows the mechanization and automation of a sharpening operation which has hitherto been carried out entirely manually.
  • the device according to the invention also has the advantage of being able to sharpen, symmetrically and at the same angle, the two faces of the same knife, by simply reversing the positioning of the knife 23 on the plate 12 . The positioning of the knife is greatly facilitated by the disengagement of the grinding wheel 33 using the cursor 60 .
  • the sharpening device is, in particular, usable for any type of workpiece requiring sharpening at a predetermined angle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP90420521A 1989-12-06 1990-11-30 Machine à affûter les couteaux à suspension flottante Withdrawn EP0432063A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8916362 1989-12-06
FR8916362A FR2655285A1 (fr) 1989-12-06 1989-12-06 Machine a affuter les couteaux.

Publications (1)

Publication Number Publication Date
EP0432063A1 true EP0432063A1 (fr) 1991-06-12

Family

ID=9388375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90420521A Withdrawn EP0432063A1 (fr) 1989-12-06 1990-11-30 Machine à affûter les couteaux à suspension flottante

Country Status (2)

Country Link
EP (1) EP0432063A1 (enrdf_load_stackoverflow)
FR (1) FR2655285A1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998058780A1 (fr) * 1997-06-20 1998-12-30 Exagraph Dispositif pour rectifier la pointe des lames de coupe de machines du genre massicots
CN107350907A (zh) * 2016-05-10 2017-11-17 天津宝盈电脑机械有限公司 电脑裁床新型磨刀装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2096890A (en) * 1936-08-21 1937-10-26 Antonio T Machetta Knife sharpener
US2715801A (en) * 1951-01-31 1955-08-23 Charles A Johnson Bevelled knife blade grinding
GB2057314A (en) * 1979-08-31 1981-04-01 Morisaki Jutakusangyo Kk Super-surfacer for machining timber
EP0225806A2 (en) * 1985-12-10 1987-06-16 Temtool Sales Pty. Limited Tool holder
EP0286266A1 (en) * 1987-03-28 1988-10-12 Thomas Ketteringham Apparatus for sharpening edge tools

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2096890A (en) * 1936-08-21 1937-10-26 Antonio T Machetta Knife sharpener
US2715801A (en) * 1951-01-31 1955-08-23 Charles A Johnson Bevelled knife blade grinding
GB2057314A (en) * 1979-08-31 1981-04-01 Morisaki Jutakusangyo Kk Super-surfacer for machining timber
EP0225806A2 (en) * 1985-12-10 1987-06-16 Temtool Sales Pty. Limited Tool holder
EP0286266A1 (en) * 1987-03-28 1988-10-12 Thomas Ketteringham Apparatus for sharpening edge tools

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998058780A1 (fr) * 1997-06-20 1998-12-30 Exagraph Dispositif pour rectifier la pointe des lames de coupe de machines du genre massicots
CN107350907A (zh) * 2016-05-10 2017-11-17 天津宝盈电脑机械有限公司 电脑裁床新型磨刀装置

Also Published As

Publication number Publication date
FR2655285A1 (fr) 1991-06-07
FR2655285B1 (enrdf_load_stackoverflow) 1994-08-19

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