EP0422517A1 - Tischanschlag für eine Stanzmachine - Google Patents

Tischanschlag für eine Stanzmachine Download PDF

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Publication number
EP0422517A1
EP0422517A1 EP90119144A EP90119144A EP0422517A1 EP 0422517 A1 EP0422517 A1 EP 0422517A1 EP 90119144 A EP90119144 A EP 90119144A EP 90119144 A EP90119144 A EP 90119144A EP 0422517 A1 EP0422517 A1 EP 0422517A1
Authority
EP
European Patent Office
Prior art keywords
stop
stop bar
notching
angular orientation
zero position
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Withdrawn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
EP90119144A
Other languages
German (de)
English (en)
French (fr)
Inventor
Peter Dipl.-Ing. Kunz
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.)
Ludwig Boschert & Co KG Maschinen- und Apparatebau GmbH
Boschert GmbH and Co KG
Original Assignee
Ludwig Boschert & Co KG Maschinen- und Apparatebau GmbH
Boschert GmbH and Co KG
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 Ludwig Boschert & Co KG Maschinen- und Apparatebau GmbH, Boschert GmbH and Co KG filed Critical Ludwig Boschert & Co KG Maschinen- und Apparatebau GmbH
Publication of EP0422517A1 publication Critical patent/EP0422517A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/26—Stops
    • 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
    • B26D7/01—Means for holding or positioning work
    • B26D7/015—Means for holding or positioning work for sheet material or piles of sheets

Definitions

  • the invention relates to a table stop for a punching machine according to the type specified by the preamble of claim 1.
  • Table stops of this design serve the purpose of being able to comply with every punching operation on a sheet metal with a corresponding adjustment dimension for the stop bar, which is defined with a predetermined dimension, relative to a predetermined zero position.
  • a guide groove is therefore usually provided in the machine table in order to be able to adjust the stop bar by means of a sliding block attached to it along the cutting edge of the punching tool and along a length measuring strip which runs parallel to the guide groove.
  • the adjustment dimension corresponding to the dimensional specification for a punching process must be read off directly on a line scale of this length measuring strip.
  • the notching tip of the notching tool forms a corresponding reference point for the two zero positions, relative to which the adjusting dimensions are to be set according to the corresponding dimensions for the notches.
  • the guide grooves for the sliding blocks of the two stop bars, which are designed accordingly in the notching machines in the machine table, are predominantly at an angle of Aligned 90 ° to each other. A matching tip angle is thus taken into account in the most frequently used notching tools.
  • a pneumatic design of a table stop is also known, in which primarily the stroke adjustment and the angular adjustment of each stop bar is carried out by means of a double-acting pressure cylinder using gauge blocks for a simplified setting of the two stop bars .
  • the gauge blocks provided in pairs for each pressure cylinder must be set along a line scale so that the adjustment dimension specified for the stop bars can experience corresponding setting inaccuracies.
  • Such pneumatic table stops also result in a very complex construction with an arrangement partially protruding above the machine table, with which these table stops are not usable for every location of the notching machines.
  • the invention characterized by the claims solves the problem of providing a table stop of the type specified which is particularly suitable for use in a notching machine and in which the adjustment dimension for the stop bar can be set more precisely.
  • the setting accuracy should be realized with measures of digital measurement technology and an assessment primarily based on the criterion of a usable experience of the table stop for different machine types with different measuring requirements.
  • the adjustment dimension in question should also be available for different angular orientations of the stop bar according to a correspondingly simplified adjustment principle.
  • the table stop shown schematically in FIG. 1 is designed for a notching machine in which the notching tool comprises an upper knife attached to a vertically movable plunger and a lower knife attached to the machine table, which are provided with two cutting edges interacting in pairs for notching metal sheets.
  • the two cutting edges 1, 2 of both the upper knife and the lower knife are brought together at a notching tip 3 of the tool at a matching tip angle, which is 90 ° for the most common notching of sheet metal and therefore also with this angle size with an imaginary top view of the machine table Notching machine is shown in Fig. 1.
  • the machine table is provided with two guide grooves 4, 5 running parallel to the cutting edges 1, 2, the longitudinal axes of which therefore also run at an angle of 90 ° and result in an intersection point 6, with which the straight line with the notching tip 3 is laid in the plane of the table y axis of an x, y coordinate system is obtained.
  • the two guide grooves 4 and 5 each provided for guiding a sliding block 7 of an associated stop bar 8 or 9 are thus aligned at an angle of 45 ° to the two coordinate axes.
  • the angular orientations of the stop bars, which are also shown in FIG. 1, perpendicular to the cutting edges 1, 2 are defined as 45 ° positions. This 45 ° position of the two stop bars, which is also illustrated in FIG.
  • FIG. 3a is also illustrated in FIG. 3b
  • the 0 ° position and the 90 ° position illustrated in FIG. 3c have been changed, so that for the most frequent notches, orientations of the stop strips 8, 9 which are parallel to the x-axis or to the y-axis are also obtained.
  • the different angular orientations to the cutting edges 1, 2 of the stop strips 8, 9 lying directly on the machine table are set via an angle scale which is provided on a clamping disk 11 which can be tightened by means of a clamping lever 10 against the respectively assigned sliding block 7.
  • the axis of rotation of the clamping disc which is secured against rotation when the clamping lever is released by a locking bolt 12 pretensioned with a compression spring, forms the pivot axis 13 or 14 for the respectively assigned stop bar.
  • the stop bars can therefore be changed in angle about such swivel axes perpendicular to the machine table relative to the two cutting edges 1, 2 of the notching tool and also to the guide grooves 4, 5 parallel thereto.
  • the magnetic strip 16 is provided for the delivery of an encoder pulse for a zero position of the pivot axis 13, 14 of the respectively assigned stop bar 8, 9, the notching tip 3 of the tool forming a corresponding reference point for the zero positions of the two stop bars set for this purpose in the 45 ° position. From the representation in FIG. 4, it can be derived for the conditions of the stop bar 9, which can be changed in angle about the pivot axis 14, that in this defined zero position with the notching tip 3 of the tool as the reference point, the stop bar 9 is aligned with the one cutting edge 1. Similar an alignment aligned with the cutting edge 2 is obtained in the defined zero position of the other stop bar 8.
  • the associated sensor 15 is connected to an electronic counting device, the evaluation electronics 17, 18 of which are designed to evaluate the sensor pulse detected by the sensor.
  • Each evaluation electronics primarily provides an upward count for the adjustment dimension of the associated stop bar along the associated guide groove, the zero position detected with the sensor by means of the magnetic strip inserted in the guide groove giving the start for this upward counting of the adjustment dimension.
  • a digital measuring display 19, 20 is controlled, so that the up-counting of the adjustment dimension for a correspondingly precise setting of each predetermined dimension for the 45 ° position can be set accordingly precisely by monitoring this measuring display.
  • each evaluation electronics 17, 18 is also designed to take into account the offset dimension which is obtained for the zero positions of the pivot axes 13, 14 oriented at the notching tip 3 of the tool as a reference point as soon as the 45 ° position of the stop bars 8, 9 is changed.
  • Fig. 4 it is clarified that when changing the angular orientation of the stop bar 9 in the 0 ° position also shown in Fig. 3b, an offset y to the notching point 3 resulting in the reference point for the zero position of the pivot axis 14 is obtained while a The corresponding offset dimension x is present when the stop bar is changed to the 90 ° position also shown in FIG. 3c.
  • each evaluation electronics 17, 18 is now designed such that the offset dimension y can be keyed in on an input keyboard 21 or 22 for acceptance and consideration by the evaluation electronics, in such a way that for the keyed offset dimension a measurement display linked to a geometric correction variable for the deviating angular orientation of the stop bar is obtained.
  • a stored value in the x, y coordinate system for the zero position of the swivel axis 14 in the 45 ° position of the stop bar 9 aligned with the cutting edge 1 can thus be taken into account for the adjustment of the swivel axis 14 to a new zero position, which in this case turns out to be one Down counting of the entered offset dimension y and thus continues until the associated digital measuring display 19, 20 shows the measuring display for the adjusted zero position of the associated swivel axis.
  • This adjusted zero position is then adopted as a new storage value, also designated in the x, y coordinate system, in order to be able to adjust the adjustment dimension of the stop bar 9 'along the associated guide groove 5 accordingly precisely according to a respective dimension specification.
  • each stop bar 8, 9 enables the upward counting intended with the associated evaluation electronics 17, 18 and the like timely digital display of each predetermined adjustment for each predetermined angular orientation of the stop bars relative to the respectively assigned cutting edge 1, 2 of the notching tool. It is evident that no particularly complex training is required for the evaluation electronics of each counting device if the specification of the adjustment dimension is taken into account in the angular orientations of the stop bars deviating from the 45 ° position by adapting the zero positions of their swivel axes.
  • each counter can optimally be equipped with a selector switch in order to be able to directly select the geometric correction quantity for the offset dimension of the swivel axis of each deviating angular orientation, which clearly shows a corresponding reduction in price the evaluation electronics of the counters used for this.
  • the evaluation electronics there is also no difficulty in designing the evaluation electronics in such a way that the counting devices can accordingly be used universally for different machine types with different measurement requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Automatic Control Of Machine Tools (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
EP90119144A 1989-10-12 1990-10-05 Tischanschlag für eine Stanzmachine Withdrawn EP0422517A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893934137 DE3934137A1 (de) 1989-10-12 1989-10-12 Tischanschlag fuer eine stanzmaschine
DE3934137 1989-10-12

Publications (1)

Publication Number Publication Date
EP0422517A1 true EP0422517A1 (de) 1991-04-17

Family

ID=6391362

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119144A Withdrawn EP0422517A1 (de) 1989-10-12 1990-10-05 Tischanschlag für eine Stanzmachine

Country Status (2)

Country Link
EP (1) EP0422517A1 (enrdf_load_stackoverflow)
DE (1) DE3934137A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4311861A1 (de) * 1993-04-10 1994-10-13 Weinig Michael Ag Verfahren zur Positionierung eines einen Bezugspunkt aufweisenden Maschinenelementes, vorzugsweise eines Bearbeitungswerkzeuges, relativ zu einem Referenzpunkt, vorzugsweise zu einem Anschlag oder einer Auflagefläche

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2625485A1 (de) * 1975-06-19 1976-12-23 Haemmerle Ag Maschf Anschlageinrichtung fuer eine abkantpresse, tafelschere oder dergleichen
DE1934847B2 (de) * 1968-08-10 1980-05-22 Alves Rastignano Bologna Cantelli (Italien) Ausklinkverfahren sowie Vorrichtung zur Durchführung des Verfahrens
US4434693A (en) * 1979-08-14 1984-03-06 Nihon Early Kabushiki Kaisha Plate positioning apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2723432C3 (de) * 1977-05-24 1982-03-04 Ludwig Boschert Maschinen- und Apparatebau GmbH & Co KG, 7850 Lörrach Tischanschlag für eine Stanzmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1934847B2 (de) * 1968-08-10 1980-05-22 Alves Rastignano Bologna Cantelli (Italien) Ausklinkverfahren sowie Vorrichtung zur Durchführung des Verfahrens
DE2625485A1 (de) * 1975-06-19 1976-12-23 Haemmerle Ag Maschf Anschlageinrichtung fuer eine abkantpresse, tafelschere oder dergleichen
US4434693A (en) * 1979-08-14 1984-03-06 Nihon Early Kabushiki Kaisha Plate positioning apparatus

Also Published As

Publication number Publication date
DE3934137C2 (enrdf_load_stackoverflow) 1992-04-16
DE3934137A1 (de) 1991-04-25

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