EP0827441B1 - Belt grinder with pivotable grinding unit and opposite supporting tables at different working heights - Google Patents

Belt grinder with pivotable grinding unit and opposite supporting tables at different working heights Download PDF

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Publication number
EP0827441B1
EP0827441B1 EP96911899A EP96911899A EP0827441B1 EP 0827441 B1 EP0827441 B1 EP 0827441B1 EP 96911899 A EP96911899 A EP 96911899A EP 96911899 A EP96911899 A EP 96911899A EP 0827441 B1 EP0827441 B1 EP 0827441B1
Authority
EP
European Patent Office
Prior art keywords
grinding unit
tables
edges
sanding unit
cosine
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
EP96911899A
Other languages
German (de)
French (fr)
Other versions
EP0827441A1 (en
Inventor
Stephan KÜNDIG
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.)
Kuendig AG
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Kuendig AG
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Filing date
Publication date
Application filed by Kuendig AG filed Critical Kuendig AG
Publication of EP0827441A1 publication Critical patent/EP0827441A1/en
Application granted granted Critical
Publication of EP0827441B1 publication Critical patent/EP0827441B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/068—Table-like supports for panels, sheets or the like
    • 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
    • B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
    • 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
    • B24B27/00—Other grinding machines or devices
    • B24B27/0084—Other grinding machines or devices the grinding wheel support being angularly adjustable

Definitions

  • the present invention relates to a belt grinder according to the preamble of claim 1.
  • a belt grinder according to the preamble of claim 1.
  • Such a device is known from US 4,346,536.
  • Edges and smaller areas are mostly on so-called Edge grinding machines with an upright, horizontally rotating and usually height adjustable Band 12 sanded.
  • Such machines often have two opposite, differently equipped processing pages with a support table 13, 14 each.
  • For grinding do not offer areas at right angles to the surface with such an arrangement there are two construction variants on: On the one hand the inclination of the support tables at vertical grinding unit, on the other hand the inclination the grinding unit with the support remaining horizontal.
  • a such device describes for example document US 4,346,536 A.
  • Refers to a corresponding arrangement the present invention since it was this one Previously required variant, the horizontal position of the Worktables each reflecting changes in inclination adapt to the milling unit. This is from the comparison the layers A and B in drawing 1 conclusively and hits also to the arrangement according to document US 4,346,536 A.
  • the starting point is a desired maximum swivel range, which is denoted by the angle y.
  • the center of rotation of the milling unit becomes on the center point P of the direct connecting line LL come to rest between the two table edges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

The invention relates to a belt grinder of which the supporting tables (13, 14) are arranged in relation to the grinding unit (11) and hence the grinding belt (12) in such a way that tables need not be adjusted at the same time as the grinding unit is pivoted, while nevertheless the gap (z) between the grinding unit and the edges of the tables remains minimal. Such an arrangement is obtained if the value one minus the cosine of half the maximum pivoting angle (y) multiplied by the direct distance (d) between the tables edges is divided by two and the cosine of half the maximum pivoting angle (y) and gives a result acceptable for practical use and compliance with the standards and safety specifications for the gap (z) between the table edges and the grinding unit.

Description

Die vorliegende Erfindung bezieht sich auf eine Band-schleifvorrichtung gemäß dem Oberbegriff des Anspruchs 1. Eine solche Vorrichtung ist aus US 4 346 536 bekannt.The present invention relates to a belt grinder according to the preamble of claim 1. Such a device is known from US 4,346,536.

Zur Illustration dieser Vorrichtung dienen die Zeichnung 1, Aufriss-Prinzipzeichnung der herkömmlichen Bauweise einer Bandschleifmaschine mit schwenkbarer Schleifeinheit 11 und Schleifband 12, je in Lage A und B, sowie den zwei sich gegenüberliegenden, auf gleichem Niveau sich befindlichen Werkstück-Auflagetischen 13 und 14 die Zeichnung 2, Aufriss-Prinzipzeichnung der neuartigen Anordnung der Auflagetische 13 und 14 auf unterschiedlichen Niveaus, mit einem Abstand d der beiden Tischkanten, dem Winkel y für den gesamten zur Verfügung stehenden Schwenkbereich und dem Winkel x zwischen den beiden Tischhöhen, dies in der Ausgangslage bei senkrechter gestellter Schleifeinheit 11, ohne Oeffnung zwischen Tischkanten und Schleifeinheit die Zeichnung 3, Aufriss-Prinzipzeichnung analog 2, jedoch bei einer Schwenkung der Schleifeinheit mit dem Drehpunkt P und dem Winkel v, bei der die Oeffnung z zwischen Tischkanten und Schleifeinheit ihr Maximum erreicht die Zeichnung 4, Aufriss-Prinzipzeichnung analog 2, jedoch bei maximaler Schwenkung der Schleifeinheit mit dem Winkel w, ohne Oeffnung zwischen Tischkanten und SchleifeinheitServe to illustrate this device the drawing 1, outline principle drawing of the conventional Construction of a belt grinding machine with swiveling grinding unit 11 and sanding belt 12, each in position A and B, and the two opposite each other, on the same level workpiece support tables 13 and 14 the drawing 2, outline principle drawing of the novel Arrangement of the support tables 13 and 14 on different Levels, with a distance d between the two table edges, the angle y for the entire available swivel range and the angle x between the two table heights, this in the Starting position with the grinding unit 11 positioned vertically, without opening between table edges and grinding unit the drawing 3, outline drawing similar to 2, however when the grinding unit swivels with the pivot point P and the angle v at which the opening z between Table edges and grinding unit reached their maximum the drawing 4, outline drawing analogous to 2, however with maximum swiveling of the grinding unit with the angle w, without opening between table edges and grinding unit

Kanten und kleinere Flächen werden meist an sogenannten Kantenschleifmaschinen mit einem aufrecht stehenden, horizontal rotierenden und in der Regel höhenverstellbaren Band 12 geschliffen. Solche Maschinen weisen häufig zwei sich gegenüberliegende, unterschiedlich ausgerüstete Bearbeitungsseiten mit je einem Auflagetisch 13, 14 auf. Zum Schleifen nicht rechtwinklig zur Auflage verlaufender Flächen bieten sich bei einer solchen Anordnung zwei Konstruktionsvarianten an: Zum einen die Schrägstellung der Auflagetische bei vertikal bleibender Schleifeinheit, zum andern die Neigung der Schleifeinheit bei horizontal bleibender Auflage. Eine solche Vorrichtung beschreibt beispielsweise Dokument US 4 346 536 A. Auf eine entsprechende Anordnung bezieht sich auch die vorliegende Erfindung, war es doch bei dieser Variante bisher erforderlich, die horizontale Lage der Arbeitstische jeweils den Veränderungen der Schrägstellung der Schleifeinheit anzupassen. Dies geht aus dem Vergleich der Lagen A und B in Zeichnung 1 schlüssig hervor und trifft auch auf die Anordnung gemäss Dokument US 4 346 536 A zu.Edges and smaller areas are mostly on so-called Edge grinding machines with an upright, horizontally rotating and usually height adjustable Band 12 sanded. Such machines often have two opposite, differently equipped processing pages with a support table 13, 14 each. For grinding do not offer areas at right angles to the surface with such an arrangement there are two construction variants on: On the one hand the inclination of the support tables at vertical grinding unit, on the other hand the inclination the grinding unit with the support remaining horizontal. A such device describes for example document US 4,346,536 A. Refers to a corresponding arrangement the present invention, since it was this one Previously required variant, the horizontal position of the Worktables each reflecting changes in inclination adapt to the milling unit. This is from the comparison the layers A and B in drawing 1 conclusively and hits also to the arrangement according to document US 4,346,536 A.

Werden dagegen, wie es der Patentanspruch 1 beschreibt, die Tische 13, 14 auf unterschiedlichen Arbeitshöhen angeordnet, so wird dies in einem bestimmten Bereich eine Schwenkung der Schleifeinheit 11 ohne gleichzeitige Anpassung der horizontalen Lage der Auflagetische ermöglichen. In contrast, as described in claim 1, the Tables 13, 14 arranged at different working heights, so this will be a swivel in a certain area Grinding unit 11 without simultaneous adjustment of the horizontal Enable the location of the support tables.

Aus Gründen des Arbeitskomforts und sicherheitstechnischer Vorschriften wird es in der Praxis zudem erforderlich sein, die bei der Schwenkung der Schleifeinheit entstehende Oeffnung z zwischen Tischkanten und Schleifband möglichst gering zu halten. Dies wiederum bedingt eine bestimmte Lage der Arbeitstische 13, 14 zwischen ihnen selbst und gegenüber dem Drehpunkt P der Schleifeinheit 11, welche aufgrund des folgenden Beschriebs eindeutig definierbar ist.For reasons of work comfort and safety In practice, regulations will also require the opening resulting from the swiveling of the grinding unit z as low as possible between table edges and sanding belt to keep. This in turn requires a certain location of the Working tables 13, 14 between themselves and opposite the Pivot point P of the grinding unit 11, which due to the following description is clearly definable.

Ausgegangen wird von einem gewünschten, maximalen Schwenkbereich, der mit dem Winkel y bezeichnet wird.The starting point is a desired maximum swivel range, which is denoted by the angle y.

Bedingung ist nun, dass derjenige Tisch, um den geschwenkt wird, um den Winkel x zur Kante des oberen Tisches tiefer liegt als diese selbst. Dabei berechnet sich x als Hälfte von y. Die direkte Distanz d zwischen den Tischkanten wiederum berechnet sich nach folgender Formel: d = 2 z cos x 1 - cos x , wobei x = y/2 wobei die Oeffnung z zwischen Schleifeinheit und Tischen aus anwendungstechnischen, sicherheitstechnischen oder andern Gründen zumeist als Maximalwert vorgegeben sein wird. Durch Umformung obiger Formel, nun in Abhängigkeit von der Distanz d, kann die Oeffnung z aber auch ihrerseits wie folgt berechnet werden: z = d (1-cos x) 2 cos x ,wobei x = y/2 The condition is now that the table that is swiveled is deeper than the angle x to the edge of the upper table itself. Here x is calculated as half of y. The direct distance d between the table edges is in turn calculated using the following formula: d = 2 z cos x 1 - cos x , where x = y / 2 wherein the opening z between the grinding unit and the tables will usually be specified as the maximum value for application-related, safety-related or other reasons. By reshaping the above formula, now depending on the distance d, the opening z can also be calculated as follows: z = d (1-cos x) 2 cos x , where x = y / 2

Sind die Werte berechnet, so wird der Drehpunkt der Schleifeinheit auf dem Mittelpunkt P der direkten Verbindungslinie LL zwischen den beiden Tischkanten zu liegen kommen.Once the values have been calculated, the center of rotation of the milling unit becomes on the center point P of the direct connecting line LL come to rest between the two table edges.

Aus dem Winkel x des Niveau-Unterschiedes der Tische, der Distanz d der Verbindung der Tischkanten und der tolerierbaren Oeffnung z zwischen Schleifeinheit und Tischkanten ergeben sich die Positionen der Tische und der Drehpunkt des Aggregats somit eineindeutig.From the angle x of the level difference of the tables, the Distance d of the connection of the table edges and the tolerable Opening z between grinding unit and table edges the positions of the tables and the pivot point of the The aggregate is therefore unambiguous.

Praxiswerte, wie beispielsweise die durch die deutsche GS-Prüfung vorgegebene maximale Oeffnung z von 8 mm, lassen sich damit unter gleichzeitiger Berücksichtigung anwendergerechter Dimensionierung der Maschine problemlos erreichen. Die maximale Oeffnung wird bei einer Schwenkung der Schleifeinheit um den Winkel v erreicht. Der Wert von v errechnet sich aus der Differenz zwischen dem Winkel x und einem rechten Winkel von 90 Grad.Practical values, such as those by the German GS test specified maximum opening z of 8 mm, can be done with simultaneous consideration User-friendly dimensioning of the machine without any problems to reach. The maximum opening is when swiveled of the grinding unit by the angle v. The value of v is calculated from the difference between the angles x and a right angle of 90 degrees.

Claims (2)

  1. Device with a band sanding unit (11) for two or more sided use, characterised in that the centre of rotation (P) of the sanding unit exactly or nearly halves the vertical distance (d) between the edges of the support tables positioned at different levels, that the support tables are separated exactly or nearly vertically to each other, which corresponds to the sine of half the maximum rotation angle (y) multiplied by the distance (d), and that the distance (d) of the straight line LL between the support table edges is equal to the product of the cosine of half of the maximum rotation angle (y) and the gap (z), created between the sanding unit (11) and one of the tables (14), multiplied by a factor of two, divided by one minus the cosine of half of the rotation angle (y), and that such an arrangement of the support table makes an unrestricted rotation of the sanding unit possible without the need to change the position of the table.
  2. Device as described in Patent Application 1, characterised in that such an arrangement of the support table makes an unrestricted rotation of the sanding unit (11) possible without the need to change the position of the table, and the gap (z) created by the rotation between the tables (13, 14) and the sanding unit (11) is minimised.
EP96911899A 1995-05-22 1996-05-10 Belt grinder with pivotable grinding unit and opposite supporting tables at different working heights Expired - Lifetime EP0827441B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH1504/95 1995-05-22
CH150495 1995-05-22
CH150495 1995-05-22
PCT/CH1996/000181 WO1996037339A1 (en) 1995-05-22 1996-05-10 Belt grinder with pivotable grinding unit and opposite supporting tables at different working heights

Publications (2)

Publication Number Publication Date
EP0827441A1 EP0827441A1 (en) 1998-03-11
EP0827441B1 true EP0827441B1 (en) 2000-02-02

Family

ID=4211998

Family Applications (1)

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EP96911899A Expired - Lifetime EP0827441B1 (en) 1995-05-22 1996-05-10 Belt grinder with pivotable grinding unit and opposite supporting tables at different working heights

Country Status (5)

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US (1) US6361421B1 (en)
EP (1) EP0827441B1 (en)
AT (1) ATE189421T1 (en)
DE (1) DE59604373D1 (en)
WO (1) WO1996037339A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996037339A1 (en) 1995-05-22 1996-11-28 Kündig Ag Belt grinder with pivotable grinding unit and opposite supporting tables at different working heights
DE59806072D1 (en) * 1997-09-25 2002-11-28 Kuendig Ag Wetzikon BELT GRINDING DEVICE WITH SWIVELING GRINDING UNIT AND INTEGRATED, FOLDING STOPS
ITRM20010677A1 (en) * 2001-11-15 2003-05-15 New Tech Srl SANDING MACHINE FOR TUBULAR PIECES EXTREMITY SOCKETS USED FOR GENERAL GRINDING.
US6733372B2 (en) * 2002-02-21 2004-05-11 Kun Yi Lin Grinding machine having adjustable mechanism

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US165762A (en) * 1875-07-20 Improvement in sandpapering-ivjachines
US1798421A (en) * 1929-06-28 1931-03-31 Marietta Mfg Co Beveling machine
US3136097A (en) * 1962-04-13 1964-06-09 Liard Maurice Working head of a sanding machine and support therefor
US3133384A (en) * 1963-07-18 1964-05-19 Liard Maurice Working head structure for sanding machine
US4346536A (en) * 1981-01-05 1982-08-31 Bryden Norman E Tilting arbor belt sander
US4926602A (en) * 1989-07-27 1990-05-22 Crouch Robert H Edge sander having adjustable support table or tables
WO1996037339A1 (en) 1995-05-22 1996-11-28 Kündig Ag Belt grinder with pivotable grinding unit and opposite supporting tables at different working heights

Also Published As

Publication number Publication date
US6361421B1 (en) 2002-03-26
DE59604373D1 (en) 2000-03-09
EP0827441A1 (en) 1998-03-11
ATE189421T1 (en) 2000-02-15
WO1996037339A1 (en) 1996-11-28

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