US3667335A - Edge trimming shears for rolled metal sheets with cross-knives for severing the edge strips - Google Patents

Edge trimming shears for rolled metal sheets with cross-knives for severing the edge strips Download PDF

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Publication number
US3667335A
US3667335A US11372A US3667335DA US3667335A US 3667335 A US3667335 A US 3667335A US 11372 A US11372 A US 11372A US 3667335D A US3667335D A US 3667335DA US 3667335 A US3667335 A US 3667335A
Authority
US
United States
Prior art keywords
knife
edge
cross
sheet
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.)
Expired - Lifetime
Application number
US11372A
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English (en)
Inventor
Paul Friedrich Hamacher
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.)
Moeller and Neuman GmbH
Original Assignee
Moeller and Neuman GmbH
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 Moeller and Neuman GmbH filed Critical Moeller and Neuman GmbH
Application granted granted Critical
Publication of US3667335A publication Critical patent/US3667335A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
    • B23D31/04—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines for trimming stock combined with devices for shredding scrap
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00—Cutting
    • Y10S83/923—Waste product cutting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/4577—Work fed successively to plural tools
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6476—Including means to move work from one tool station to another
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6476—Including means to move work from one tool station to another
    • Y10T83/6478—Tool stations angularly related
    • Y10T83/648—Work manipulated between tool stations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/808—Two tool pairs, driver for one pair moves relative to driver for other pair
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8798—With simple oscillating motion only
    • Y10T83/8804—Tool driver movable relative to tool support
    • Y10T83/8805—Cam or eccentric revolving about fixed axis

Definitions

  • the invention relates to edge trimming shears for rolled cross-knife forms with the horizontal an angle of over 90.
  • edge trimming shears described herein are of the type having a pair of cross-knives arranged at the output side for severing the edge strips that have been cut in the preceding trimming cut, as disclosed for example in French Pat. No. 1,392,140 and in German Utility Model Pat. No. 1,980,004.
  • the known edge trimming shears having a pair of crossknives at the output side are of similar construction in that the moving upper cross-knife must be guided as closely as possible past the trimmed sheet edge in order to push the cut strips still clinging to the'sheet downwardly against the lower crossknife, which requires an exact setting of the upper cross-knife after each knife change.
  • the cross-knife is set too closely toward the sheet it can produce damage to the sheet edge.
  • it is set too short its cutting edge does not overlap the edge strip in its entire width. Even in the case where the upper cross-knife is properly set the trimming cut may be adversely affected in the event that a narrow edge strip is twisted and turns partly under the trimmed sheet.
  • the upper cross-knife is carried in the manner of a socalled alligator shears by an oscillating lever which is mounted on an oscillating shaft disposed below the cutting edge of the lower straight knife and extends approximately parallel to the straight knives.
  • an oscillating lever which is mounted on an oscillating shaft disposed below the cutting edge of the lower straight knife and extends approximately parallel to the straight knives.
  • the upper cross-knife is appropriately arranged relative to the lower cross-knife in such a way that it is disposed behind the lower cross-knife in .the advancing direction of the sheet.
  • an independent knife retraction in the advancing direction of the sheet in order to avoid that the upper cross-knife glides during the return stroke along the cut surface of the edge strip still clinging to the sheet.
  • a special knife retraction for the upper cross-knife is eliminated according to the invention in that the upper crossknife is guided in a plane which deviates from the perpendicular in such a way that the confronting knife side surface of the an alligator type shears construction of the pair of cross-knives this means that the oscillating shaft of the oscillating lever is inclined downwardly in the advancing direction of the sheet. In this way an edge strip is cut in a plane which deviates slightly from the perpendicular in which, relative to the upper limitation of the cutting surface, the upper cross-knife cuts slightly behind the upper edge of the edge strip still clinging to the sheet.
  • edge strip which is still integral with the sheet at the level of the sheet is bent by the upper cross-knife down to the subjacent lower knife, it will attempt to spring back into its original position after the cut. Due to the inclination of the cutting plane of the cross-knife arrangement by a few degrees a small interval is established during the return flexing of the edge strip between its cut surface and the confronting side surface of the upper cross-knife, so that a retraction of this knife is not necessary.
  • FIG. 1 is a partial elevation view
  • FIG. 2 is a vertical cross-section through the cross-knife arrangement along line II-Il in FIG. 1, and
  • FIG. 3 is a cross-section along line III-III in FIG. 2.
  • the most essential parts of the edge trimming shears according to FIG. 1 are the shears stand 10 with the lower knife beam 11, the pivotable upper knife support 12 with the upper knife 13 and the cross-knife arrangement with the oscillating lever 24 for the upper cross-knife 15 at the output side and the stationary lower cross-knife 16 disposed clearly below the upper edge 17 of the lower straight knife 18.
  • FIG. 1 shows the inclined cutting plane of the crossknife arrangement l4, l5 and 16 whereby the confronting knife surface 15a of the upper cross-knife 15 is released during the return stroke from the cutting surface of an edge strip will clinging to the sheet when the strip springs back upwardly after the cutting of a piece of the edge strip that has passed through.
  • the severed edge strips drop on a chute which conveys the edge strips on a scrap carrier located below the shears.
  • a double-armed oscillating lever 24 is shown with the knife saddle 25 for the upper cross-knife 15 as well as the lower cross-knife 16.
  • the oscillating lever is mounted on an oscillating shaft'26 which extends parallel to the straight knives 1318, but which is arranged according to FIG. 3 at an angle in the shears stand 10 more particularly inclined downwardly in the advancing direction 20 of the sheet in order to set the inclined position of the cutting plane of the cross-knives l5 and 16 shown in FIG. 1.
  • the oscillating shaft 26 is located below the cutting edge of the lower straight knife 18 the outermost point of the upper cross-knife 15 describes during cutting an are 27 which extends with an interval past the trimmed edge of the sheet 30. Accordingly it is also not necessary to retract the upper cross-knife 15 in the horizontal direction during the return stroke, and similarly the cutting range of the twocross-knives can extend visibly up to the'vertical projection of the trimmed sheet 30.
  • the rearward end of the double-arm oscillating lever 24 is bifurcated and carries a pivot stud 28 to which a connecting rod 40 is connected over a spherical sleeve 29.
  • the connecting rod 40 is actuated by a large eccentric 42 of the crankshaft 41 and this connection is also obtained by the intennediary of a spherical sleeve 43.
  • the eccentric 42 is so located that the upper cross-knife 15 begins to sever the edge strip 31 cut from the sheet 30 and pushed down to the level of the lower crossknife 16.
  • the direction of rotation of the eccentric42 is indicated in FIG. 2 by an arrow.
  • the crankshaft 41 is the main crankshaft which actuates also the pivotable knife support 12.
  • the drive of the shears is started so that the upper straight knife 13 moves downward and cuts in for an edge strip 31.
  • the cutting edge of the upper straight knife 13 is curved at the input end as this cutting edge must come out of the sheet cross-section in the lower dead center position of the knife support 12.
  • the drives for the knife support 12 and the cross-knife 15 are offset at an angle relative to each other in such a way that the upper cross-knife 15 starts its out later than the upper straight knife 13, while cutting the edge strip 31 still during the edging trimming cut.
  • the upper cross-knife l overtakes the upper straight knife 13 due to the considerably larger eccentricity of the eccentric 42 of the scrap knife arrangement relative to the eccenter (not shown) of the edge trimming knife drive. in this way the upper cross-knife 15 reaches quickly the upper dead center point position in which the edge strip 31 clinging to the sheet 30, although it has sprung back approximately to the level of the sheet 30, is not obstructed.
  • the oscillating lever 24 has already travelled through its upper dead center point position and approaches the start-cut position shown in the drawing.
  • Edge trimming shears for rolled metal sheet having a pair of straight knives for trimming the sheet edge and cross-knives for severing the edge strips already cut from the sheet,
  • the upper cross knife has an independent drive and the cutting edge of the lower cross-knife is disposed at a lower level than the cutting-edge of the stationary lower straight knife, the improvement consisting in that the upper crossknife (15) is carried by an oscillating lever (24) which is mounted on an oscillating shaft (26) arranged below the cutting edge of the lower straight knife (18) and inclined downwardly in the advancing direction of the sheet and extending approximately parallel to the straight knives.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shearing Machines (AREA)
US11372A 1969-02-15 1970-02-16 Edge trimming shears for rolled metal sheets with cross-knives for severing the edge strips Expired - Lifetime US3667335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1907717A DE1907717C3 (de) 1969-02-15 1969-02-15 Besäumschere für Walzbleche mit Quermessern zum Abschneiden der Saumstreifen

Publications (1)

Publication Number Publication Date
US3667335A true US3667335A (en) 1972-06-06

Family

ID=5725397

Family Applications (1)

Application Number Title Priority Date Filing Date
US11372A Expired - Lifetime US3667335A (en) 1969-02-15 1970-02-16 Edge trimming shears for rolled metal sheets with cross-knives for severing the edge strips

Country Status (6)

Country Link
US (1) US3667335A (enrdf_load_stackoverflow)
AT (1) AT290952B (enrdf_load_stackoverflow)
DE (1) DE1907717C3 (enrdf_load_stackoverflow)
DK (1) DK125830B (enrdf_load_stackoverflow)
FR (1) FR2035188A5 (enrdf_load_stackoverflow)
GB (1) GB1294977A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795167A (en) * 1971-05-08 1974-03-05 Moeller & Neumann Gmbh Plate trimming shears
US3808926A (en) * 1972-05-19 1974-05-07 Ketcham & Mcdougall Automatic letter opener
US4015707A (en) * 1976-06-07 1977-04-05 Rca Corporation Carrier for semiconductor components
US4079649A (en) * 1976-02-10 1978-03-21 Ishikawajima-Harima Jukogyo Kaisha Rolling cut type double side shear
US20100269664A1 (en) * 2009-04-22 2010-10-28 Mike Majchrowski Servo pouch knife assembly
US8997613B2 (en) 2010-06-19 2015-04-07 Sms Siemag Aktiengesellschaft Method and device for trimming heavy plates

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4330657A1 (de) * 1993-09-10 1995-03-16 Schloemann Siemag Ag Vorrichtung zum Besäumen der Längskanten von laufendem Walzgut

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US776345A (en) * 1904-01-29 1904-11-29 Robert Norrie Machine for punching or shearing metal.
US1617486A (en) * 1922-07-24 1927-02-15 Charles L Huston Facing shears for cutting heavy sheet metal
US3392615A (en) * 1965-12-07 1968-07-16 Rosskath Wilhelm Pattern cutting device
US3492898A (en) * 1967-02-21 1970-02-03 Schloemann Ag Shears for trimming rolled metal sheets

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US776345A (en) * 1904-01-29 1904-11-29 Robert Norrie Machine for punching or shearing metal.
US1617486A (en) * 1922-07-24 1927-02-15 Charles L Huston Facing shears for cutting heavy sheet metal
US3392615A (en) * 1965-12-07 1968-07-16 Rosskath Wilhelm Pattern cutting device
US3492898A (en) * 1967-02-21 1970-02-03 Schloemann Ag Shears for trimming rolled metal sheets

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3795167A (en) * 1971-05-08 1974-03-05 Moeller & Neumann Gmbh Plate trimming shears
US3808926A (en) * 1972-05-19 1974-05-07 Ketcham & Mcdougall Automatic letter opener
US4079649A (en) * 1976-02-10 1978-03-21 Ishikawajima-Harima Jukogyo Kaisha Rolling cut type double side shear
US4015707A (en) * 1976-06-07 1977-04-05 Rca Corporation Carrier for semiconductor components
US20100269664A1 (en) * 2009-04-22 2010-10-28 Mike Majchrowski Servo pouch knife assembly
US8997613B2 (en) 2010-06-19 2015-04-07 Sms Siemag Aktiengesellschaft Method and device for trimming heavy plates

Also Published As

Publication number Publication date
AT290952B (de) 1971-06-25
GB1294977A (enrdf_load_stackoverflow) 1972-11-01
DK125830B (da) 1973-05-14
DE1907717B2 (de) 1974-05-02
DE1907717A1 (de) 1970-09-03
DE1907717C3 (de) 1974-11-28
FR2035188A5 (enrdf_load_stackoverflow) 1970-12-18

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