EP0827441A1 - 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

Info

Publication number
EP0827441A1
EP0827441A1 EP96911899A EP96911899A EP0827441A1 EP 0827441 A1 EP0827441 A1 EP 0827441A1 EP 96911899 A EP96911899 A EP 96911899A EP 96911899 A EP96911899 A EP 96911899A EP 0827441 A1 EP0827441 A1 EP 0827441A1
Authority
EP
European Patent Office
Prior art keywords
grinding unit
tables
arrangement
edges
grinding
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.)
Granted
Application number
EP96911899A
Other languages
German (de)
French (fr)
Other versions
EP0827441B1 (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
Original Assignee
Kuendig AG
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 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

Links

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 grinding device as described in patent claims 1, 2, 3, 4 and 5.
  • drawing 1 basic outline drawing of the conventional construction of a belt grinding machine with swiveling grinding unit 11 and grinding belt 12, each in position A and B, and the two opposite workpiece support tables 13 and 14 the drawing 2, basic outline drawing of the novel arrangement of the support tables 13 and 14 at 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 the table edges and grinding unit, drawing 3, basic outline drawing analogous to 2, but with a pivoting of the grinding unit with the pivot point P and the angle v, in which the opening z between the table edges and the grinding unit is hers Drawing 4, elevation price, reaches its maximum Analog drawing 2, however at maximum swiveling of the milling unit with the angle w, without opening between table edges and milling unit
  • Edges and smaller surfaces are usually ground on so-called edge grinding machines with an upright, horizontally rotating and generally height-adjustable belt 12. Such machines often have two opposing, differently equipped machining sides, each with a support table 13, 14. With such an arrangement, two construction variants are available for grinding surfaces that do not run at right angles to the support: on the one hand, the inclination of the support tables with the grinding unit remaining vertical, and on the other hand, the inclination of the grinding unit with the support remaining horizontal.
  • the present invention relates to the latter design, since it was previously necessary in this variant to adapt the horizontal position of the work tables to the changes in the inclination of the grinding unit. This is conclusively apparent from the comparison of layers A and B in drawing 1.
  • the tables 13, 14 are arranged at different working heights, this will enable the grinding unit 11 to be pivoted in a certain area without simultaneous adjustment of the horizontal position of the support tables.
  • it will also be necessary in practice to keep the opening z between the table edges and the sanding belt that arises when the grinding unit is pivoted as small as possible. This in turn requires a certain position of the work tables 13, 14 between them themselves and with respect to the pivot point P of the grinding unit 11, which can be clearly defined on the basis of the following description.
  • the starting point is a desired maximum swivel range, which is designated by the angle y.
  • 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.
  • the pivot point of the grinding unit will lie on the center point P of the direct connecting line LL 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

Beschreibungdescription
Titel: Bandschleifvorrichtung mit schwenkbarer Schleif¬ einheit und einander gegenüberliegenden Auflagetischen auf unterschiedlichen ArbeitshöhenTitle: Belt sanding device with swiveling sanding unit and opposite support tables at different working heights
Die vorliegende Erfindung bezieht sich auf eine Band¬ schleifVorrichtung wie in Patentansprüchen 1. 2, 3, 4 und 5 beschrieben.The present invention relates to a belt grinding device as described in patent claims 1, 2, 3, 4 and 5.
Zur Illustration dieser Vorrichtung dienen die Zeichnung 1, Aufriss-Prinzipzeichnung der herkömmlichen Bauweise einer Bandschleifmaschine mit schwenkbarer Schleif¬ einheit 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 Win¬ kel 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 SchleifeinheitTo illustrate this device, use drawing 1, basic outline drawing of the conventional construction of a belt grinding machine with swiveling grinding unit 11 and grinding belt 12, each in position A and B, and the two opposite workpiece support tables 13 and 14 the drawing 2, basic outline drawing of the novel arrangement of the support tables 13 and 14 at 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 the table edges and grinding unit, drawing 3, basic outline drawing analogous to 2, but with a pivoting of the grinding unit with the pivot point P and the angle v, in which the opening z between the table edges and the grinding unit is hers Drawing 4, elevation price, reaches its maximum Analog drawing 2, however at maximum swiveling of the milling unit with the angle w, without opening between table edges and milling 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 Bearbeitungs¬ seiten 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. Auf letztere Bauweise bezieht sich die vorliegende Erfindung, war es doch bei dieser Variante bisher erforderlich, die horizon¬ tale 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.Edges and smaller surfaces are usually ground on so-called edge grinding machines with an upright, horizontally rotating and generally height-adjustable belt 12. Such machines often have two opposing, differently equipped machining sides, each with a support table 13, 14. With such an arrangement, two construction variants are available for grinding surfaces that do not run at right angles to the support: on the one hand, the inclination of the support tables with the grinding unit remaining vertical, and on the other hand, the inclination of the grinding unit with the support remaining horizontal. The present invention relates to the latter design, since it was previously necessary in this variant to adapt the horizontal position of the work tables to the changes in the inclination of the grinding unit. This is conclusively apparent from the comparison of layers A and B in drawing 1.
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 horizon¬ talen Lage der Auflagetische ermöglichen. Aus Gründen des Arbeitskomforts und sicherheitstechnischer Vorschriften wird es in der Praxis zudem erforderlich sein, die bei der Schwenkung der Schleifeinheit entstehende Oeff¬ nung 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.If, on the other hand, the tables 13, 14 are arranged at different working heights, this will enable the grinding unit 11 to be pivoted in a certain area without simultaneous adjustment of the horizontal position of the support tables. For reasons of working comfort and safety regulations, it will also be necessary in practice to keep the opening z between the table edges and the sanding belt that arises when the grinding unit is pivoted as small as possible. This in turn requires a certain position of the work tables 13, 14 between them themselves and with respect to the pivot point P of the grinding unit 11, which can be clearly defined on the basis of the following description.
Ausgegangen wird von einem gewünschten, maximalen Schwenk¬ bereich, der mit dem Winkel y bezeichnet wird.The starting point is a desired maximum swivel range, which is designated 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: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:
2 z cos x d = , wobei x = y/22 z cos x d =, where x = y / 2
1 - cos x1 - cos x
wobei die Oeffnung z zwischen Schleifeinheit und Tischen aus anwendungstechnischen, sicherheitεtechnischen 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 berech¬ net werden: d ( 1-coε x ) z = , wobei x = y/2wherein 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 in turn also be calculated as follows: d (1-coε x) z =, where x = y / 2
2 cos x2 cos x
Sind die Werte berechnet, so wird der Drehpunkt der Schleif- einheit auf dem Mittelpunkt P der direkten Verbindungslinie LL zwischen den beiden Tischkanten zu liegen kommen.Once the values have been calculated, the pivot point of the grinding unit will lie on the center point P of the direct connecting line LL between the two table edges.
Aus dem Winkel x des Niveau-Unterschiedes der Tische, der Distanz d der Verbindung der Tischkanten und der tolerier¬ baren 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 difference in level of the tables, the distance d between the connection of the table edges and the tolerable opening z between the grinding unit and the table edges, the positions of the tables and the pivot point of the unit thus result unambiguously.
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 the maximum opening z of 8 mm specified by the German GS test, can be easily achieved while taking the machine's dimensioning into account. The maximum opening is achieved by swiveling the grinding unit by the angle v. The value of v is calculated from the difference between the angle x and a right angle of 90 degrees.

Claims

Patentansprüche: Claims:
1. Vorrichtung mit einer für zwei- oder mehrseitigen Benut¬ zung ausgelegten Bandschleifeinheit (11), dadurch gekenn¬ zeichnet, dass aufgrund der unterschiedlich hoch angeord¬ neten Auflagetische (13, 14) eine unbehinderte Schwenkung der Schleifeinheit (11) ohne Veränderung der Position eben dieser Tische möglich ist.1. Device with a belt grinding unit (11) designed for use on two or more sides, characterized in that, due to the differently arranged support tables (13, 14), an unobstructed pivoting of the grinding unit (11) without changing the position this table is possible.
2. Vorrichtung gemäss Patentanspruch 1, dadurch gekennzeich¬ net, dass die Anordnung der Auflagetische ein Verhältnis zwischen Ihrem gegenseitigen horizontalen und vertikalen Abstand und in Bezug auf den Drehpunkt (P) der Schleif- einheit erreicht, welches die bei der Schwenkung entste¬ hende Oeffnung (z) zwischen Tischen (13, 14) und Schleif- einheit (11) minimiert.2. Device according to claim 1, characterized in that the arrangement of the support tables achieves a relationship between their mutual horizontal and vertical distance and in relation to the pivot point (P) of the grinding unit, which is the opening which arises during the pivoting (z) between tables (13, 14) and grinding unit (11) minimized.
3. Vorrichtung gemäss Patentansprüchen 1 und 2, dadurch ge¬ kennzeichnet, dass der Anordnung der Auflagetische (13, 14) zueinander und mit Bezug zur Schleifeinheit (11) genau oder näherungsweise die Formel zugrundeliegt, wonach sich die Distanz (d) zwischen den Tischkanten und damit die Be¬ stimmung eines zentrischen Drehpunktes (P) aus der Divi¬ sion der mit dem cosinus aus dem halben maximalen Schwen- kungsswinkel (y) sowie dem Faktor zwei multiplizierten Oeffnung (z), die sich zwischen der Schleifeinheit (11) und einem der Tische (14) bildet, durch den Wert von eins minus dem cosinus aus dem halben maximalen Schwenkungε- winkel (y) ergibt.3. Device according to claims 1 and 2, characterized ge indicates that the arrangement of the support tables (13, 14) to each other and with respect to the grinding unit (11) is based exactly or approximately on the formula, according to which the distance (d) between the table edges and thus the determination of a central pivot point (P) from the division of the opening (z) multiplied by the cosine from half the maximum pivot angle (y) and the factor two, which is between the grinding unit (11) and forms one of the tables (14) by the value of one minus the cosine from half the maximum swivel angle (y).
4. Vorrichtung gemäss Patentansprüchen 1, 2 und 3, dadurch gekennzeichnet, dass bei der in den Patentansprüchen ge¬ nannten Anordnung Normen und sicherheitstechnische Vor¬ schriften erfüllt werden, die bei abweichendem Verhältnis von horizontalem zu vertikalem Abstand der Arbeitstische nicht erreichbar wären.4. Device according to claims 1, 2 and 3, characterized in that in the arrangement mentioned in the claims, standards and safety regulations are met which would not be achievable if the ratio of the horizontal to vertical distance between the work tables differed.
5. Vorrichtung gemäss Patentansprüchen 1, 2 und 3, dadurch gekennzeichnet, dass bei der in den Patentansprüchen ge¬ nannten Anordnung Tischverstellungen nicht erforderlich sind und damit wirtschaftliche Vorteile bei Herstellung und Anwendung gegenüber der herkömmlich bekannten Bauweise anfallen. 5. Device according to claims 1, 2 and 3, characterized in that in the arrangement mentioned in the claims ge table adjustments are not required and thus there are economic advantages in manufacture and use compared to the conventionally known construction.
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 true EP0827441A1 (en) 1998-03-11
EP0827441B1 EP0827441B1 (en) 2000-02-02

Family

ID=4211998

Family Applications (1)

Application Number Title Priority Date Filing Date
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)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6361421B1 (en) 1995-05-22 2002-03-26 Kuendig Stephan Belt grinder with pivotable grinding unit and opposite supporting tables at different working heights

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9637339A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6361421B1 (en) 1995-05-22 2002-03-26 Kuendig Stephan 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
EP0827441B1 (en) 2000-02-02
DE59604373D1 (en) 2000-03-09
ATE189421T1 (en) 2000-02-15
WO1996037339A1 (en) 1996-11-28

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