DK200800239U3

DK200800239U3 - Sanding disc with sandpaper blanks

Info

Publication number: DK200800239U3
Application number: DK200800239U
Authority: DK
Inventors: Jespersen Poul Erik
Original assignee: Flex Trim As
Priority date: 2008-12-09
Filing date: 2008-12-09
Publication date: 2009-02-27
Also published as: DK200800239U1

Description

1DK 2008 00239 U31DK 2008 00239 U3

Den foreliggende opfindelse angår en slibeskive og af den i indledningen til krav 1 angivne art.The present invention relates to a grinding wheel and of the kind specified in the preamble of claim 1.

Ved slibning med for eksempel en vinkelsliber eller en boremaskine er de fleste slibeskiver, som anvendes, enten en flad skive eller en ringskive, hvor der skal anvendes en del kræfter for at holde slibeskiven stabilt ind imod en overflade, der ønskes slebet.When grinding with, for example, an angle grinder or a drill, most of the grinding wheels used are either a flat disk or an annular disk, where some force must be used to keep the grinding wheel stable against a surface which is desired to be grinded.

Anvendes en flad slibeskive, er det endvidere svært at slibe konkave overflader, uden at der efterlades tydelige slibespor efter slibeskivens omkredskant.Furthermore, if a flat grinding wheel is used, it is difficult to grind concave surfaces without leaving clear grinding grooves along the circumferential edge of the grinding wheel.

En slibeskive af den type, som er omtalt i indledningen til krav 1, kendes fra US 4 493 170. Denne type slibeskive kan betegnes som en ringskive, idet sandpapiremneme befinder sig på en perifer ring af slibeskiven.A grinding wheel of the type mentioned in the preamble of claim 1 is known from US 4 493 170. This type of grinding wheel can be referred to as an annular disc, the sandpaper strips being on a peripheral ring of the grinding disc.

Anvendes en ringskive, hvor der kun er slibende materiale fra slibeskivens periferi og et stykke ind på slibeskiven, skal der, for at slibe hele overfladen, anvendes en del fejende bevægelser med slibemaskinen, hvilket kan være trættende for operatøren, der samtidig med de fejende bevægelser skal holde imod slibemaskines roterende bevægelse.If an annular disc is used where there is only abrasive material from the periphery of the abrasive disc and a piece into the abrasive disc, in order to grind the entire surface, some sweeping movements with the grinding machine must be used, which can be tiring for the operator, who at the same time with the sweeping movements. must resist the rotary movement of the grinder.

Skal der slibes i udsparinger/undersænkninger, er der svært at benytte de kendte slibeskiver, da det ikke er muligt på en tilfredsstillende måde at føre slibeskivens slibende dele ned i udsparinger/undersænkninger, således at der efterlades en jævnt slebet overflade.If you need to grind in recesses / countersinks, it is difficult to use the known abrasive discs, since it is not possible to satisfactorily insert the abrasive parts of the abrasive disc into recesses / countersets, leaving an evenly sanded surface.

Typisk vil operatøren prøve at få kanten af slibeskiven ned i udsparinger/undersænkninger, hvilket medfører at slibeskiven ødelægges, og der opnås kun en uensartet slibning af udsparingen/undersænkningen.Typically, the operator will try to get the edge of the grinding wheel into recesses / depressions, which causes the grinding wheel to be destroyed and only a uniform grinding of the recess / recess is achieved.

Formålet med den foreliggende opfindelse er derfor at angive en slibeskive der sikrer en stabil og ensartet slibning, og som er velegnet til slibning af konkave, konvekse og plane flader samt udsparinger/undersænkninger.The object of the present invention is therefore to provide a grinding wheel which ensures a stable and uniform grinding and which is suitable for grinding concave, convex and flat surfaces as well as recesses / countersinks.

2 2DK 2008 00239 U32 2GB 2008 00239 U3

Dette opnås med en slibeskive som beskrevet i indledningen til krav 1, og hvor fladen har tiltagende højde indefter fra en periferi af fladen, og at sandpapiremnerne har en tilnærmelsesvis radial udstrækning over størstedelen af radius af fladen.This is achieved with a grinding wheel as described in the preamble of claim 1, wherein the surface has increasing height from the inside of a periphery of the surface, and that the sandpaper blanks have an approximately radial extension over most of the radius of the surface.

For at opnå en mere stabil og god slibning af en overflade er sandpapiremnerne fordelt polært og jævnt rundt på slibeskivens flade, således at sandpapiremnerne her dækker størstedelen af fladens radius, hvilket medfører at størstedelen af slibeskivens flade kan anvendes til underslibning.To achieve a more stable and good sanding of a surface, the sandpaper blanks are distributed polar and evenly around the surface of the grinding wheel, so that the sandpaper blanks here cover most of the radius of the surface, which means that most of the surface of the grinding wheel can be used for grinding.

Det at fladen har en tiltagende højde indefter fra fladens periferi medfører, at slibeskiven vil føles meget stabil, da det er slibeskivens centerdel, der først støder an imod den overflade, der ønskes slebet.The fact that the surface has an increasing height from the inside of the surface of the surface means that the abrasive disc will feel very stable, since it is the center part of the abrasive disc which first abuts the surface that is desired to be sanded.

Omkring centerdelen af slibeskiven vil der ikke være store sideværts kræfter, der trækker slibeskiven henover overfladen, og det vil derfor være nemt at holde slibeskiven ind imod overfladen.Around the center part of the grinding wheel there will be no large lateral forces pulling the grinding wheel across the surface, and it will therefore be easy to hold the grinding wheel towards the surface.

Skal der slibes større områder, vil det endvidere være en fordel, at fladen har tiltagende højde indefter fra fladens periferi, da der ved anlæg imod en overflade først slibes omkring slibeskivens centerdel, hvorefter slibningen vil brede sig udefter, alt afhængig af hvilket tryk der påføres slibeskiven. Det medfører, at det ikke er nødvendigt med store svingende armbevægelser for at fa slebet en overflade.If larger areas are to be sanded, it will also be advantageous for the surface to have increasing height from the periphery of the surface, since, when abutting against a surface, the abrasive disc will first be sanded, after which the sanding will spread outward, depending on the pressure applied. the grinding wheel. This means that large swinging arm movements are not required to get a surface ground.

Ved slibning af udsparinger/undersænkninger placeres slibeskivens centerdel ned over udsparinger/undersænkninger, hvilket medfører at sandpapiremnerne ind imod midten af slibeskiven vil trænge ned i udsparinger/undersænkninger, mens den resterende del af sandpapiremnerne vil slibe kantområdeme omkring udsparinger/undersænkninger.When grinding recesses / countersinks, the center part of the grinding wheel is placed down over recesses / counters, which means that the sandpaper blanks towards the middle of the grinding wheel will penetrate into recesses / countersinks, while the remaining part of the sandpaper blanks will sharpen the edge areas around recesses / submerges.

Det er muligt med en slibeskive ifølge den foreliggende opfindelse at slibe på profiljern (I, H og U ), samt eksempelvis slibe undersænkede samlinger i gulve.It is possible with a grinding wheel according to the present invention to grind on profile iron (I, H and U), as well as, for example, grinding recessed joints in floors.

Ved at sandpapiremnerne er monteret overvejende vinkelret på skivens flade, er det muligt at udnytte sandpapiremnemes slibende del bedre, end det er tilfældet for slibe-papiremner, som bevidst er placeret med store overlap. Således har en slibeskive iføl- 3 3DK 2008 00239 U3 ge den foreliggende opfindelse en længere levetid end de almindeligt kendte flade eller ringformede slibe skiver.Because the sandpaper blanks are mounted predominantly perpendicular to the surface of the disc, it is possible to make better use of the abrasive part of the sandpaper blanks than is the case for sandpaper blanks deliberately placed with large overlaps. Thus, a grinding wheel according to the present invention has a longer life than the generally known flat or annular grinding wheels.

Med et mellemrum mellem sandpapiremnernes opnås endvidere en bedre slibeeffekt, da mellemrummene er med til at transportere afslebet materiale væk fra sandpapirem-neme, hvorved at sandpapiremnernes slibende del får en bedre slibende effekt, fordi de ikke er fyldt op med afslebet materiale.Furthermore, with a gap between the sandpaper blanks, a better abrasive effect is obtained, as the blanks help to transport sanded material away from the sandpaper strips, whereby the sanding part of the sandpaper blanks has a better abrasive effect because they are not filled with sanded material.

I stedet for at montere sandpapiremnerne, så de har en radial udstrækning over størstedelen af fladens radius, kan sandpapiremneme monteres i forhold til omdrejningsretningen i et bagud buet arrangement.Instead of mounting the sandpaper blanks so that they have a radial extension over most of the radius of the surface, the sandpaper blanks can be mounted relative to the direction of rotation in a rearwardly curved arrangement.

For at gøre slibeskiven mere fleksibel og blød at anvende er sandpapiremneme opslidset indad imod fladen, så der dannes et antal slibestrips. Alternativt består sandpapiremneme af et antal sandpapirsstrips. I begge tilfælde er det muligt at slibe kantede, buede overflader, da slibestrips eller sandpapirsstrips vil kunne give sig og forrykkes indbyrdes og derved følge overfladen bedre.To make the grinding wheel more flexible and soft to use, the sandpaper strips are slotted inward against the surface, so a number of grinding strips are formed. Alternatively, sandpaper strips consist of a number of sandpaper strips. In both cases, it is possible to grind angular, curved surfaces, as abrasive strips or sandpaper strips may give way and wrinkle each other, thereby better following the surface.

Sandpapiremnemes slibeevne kan forbedres ved, at sandpapiremneme understøttes af et antal støttebørster, der ligeledes er monteret overvejende vinkelret på skivens flade. Støttebørsterne placeres lige bag ved sandpapiremneme, således at de understøtter sandpapiremnerne og derved holder den slibende del af sandpapiremneme ind imod overfladen, der skal slibes.The abrasiveness of the sandpaper belts can be improved by supporting the sandpaper belts by a number of support brushes which are also mounted predominantly perpendicular to the surface of the disc. The support brushes are placed just behind the sandpaper blades so that they support the sandpaper blanks, thereby holding the abrasive portion of the sandpaper blades against the surface to be sanded.

Støttebørsterne sørger endvidere for, at sandpapiremneme aldrig vil bukke omkring ved foden og lægge sig tilbage henover slibeskivens flade. Det er en fordel, at der er en vis afstand fra slibeskivens flade og ned til den overflade, der ønskes slebet, således at afslebet materiale kan føres væk og at reducere risikoen for, at slibeskivens flade komme i kontakt med den afslebne overflade.The support brushes further ensure that the sandpaper strips will never bend at the foot and lie back over the grinding wheel surface. An advantage is that there is a certain distance from the surface of the abrasive disc to the surface that is desired to be abraded, so that the abrasive material can be carried away and to reduce the risk of the abrasive disc's surface coming into contact with the abrasive surface.

Antallet af rækker af støttebørster kan være forskelligt, alt afhængig af hvor megen understøttelse sandpapiremneme skal have. Det medfører at der for eksempel kan være tre rækker støttebørster bag hvert enkelt af alle sandpapiremnerne.The number of rows of support brushes can vary, depending on how much support the sandpaper strips need. This means, for example, that there may be three rows of support brushes behind each of all the sandpaper blanks.

4 4DK 2008 00239 U3 I en udførelsesform af opfindelsen har støtte børsterne samme højde indefter fra fladens periferi., hvilket medfører at der opnås et ensartet pudsetryk.In an embodiment of the invention, the brushes have the same height from the periphery of the surface, which results in a uniform plaster pressure.

Slibeskiven kan være fremstillet således, at den er en sammenstøbt enhed med sand-papiremneme og støttebørsteme. Dette bevirker, at når enten sandpapiremneme eller støttebørsteme er nedslidt, udskiftes hele slibeskiven.The abrasive disk may be manufactured to be a molded unit with sand-paper blanks and support brushes. This means that when either the sandpaper strips or the support brushes are worn, the entire grinding wheel is replaced.

Alternativt kan slibeskiven være udformet i separate dele, hvor slibeskiven er forsynet med åbninger til optagelse af sandpapiremneme og/eller støttebørsteme. Åbningerne til optagelse af sandpapiremneme kan være underskåme kanaler, og åbningerne til optagelse af støttebørsteme kan være huller. Sandpapiremneme og/eller støttebørsterne kan efterfølgende limes eller støbes fast i disse åbninger.Alternatively, the abrasive disk may be formed in separate portions where the abrasive disk is provided with apertures for receiving the sandpaper pads and / or support brushes. The openings for recording the sandpaper strips can be sub-channel, and the openings for recording the support brushes can be holes. The sandpaper strips and / or support brushes can subsequently be glued or molded into these openings.

Dog kan der ved brug af slibeskiven til slibning af eksempelvis kantende overflader forekomme, at enkelte sandpapiremner rives i stykker eller slides hurtigere end andre. Det er derfor en fordel, at sandpapiremneme og/eller støttebørsteme er indrettet til at kunne udskiftes individuelt.However, when using the abrasive disk for grinding, for example, edging surfaces, some sandpaper pieces may tear or wear faster than others. It is therefore advantageous that sandpaper strips and / or support brushes are arranged to be individually replaceable.

For at kunne udskifte sandpapiremneme og/eller støttebørsteme kan de være fastgjort til slibeskivens flade med en af følgende løsninger:In order to be able to replace sandpaper strips and / or support brushes, they can be attached to the surface of the grinding wheel with one of the following solutions:

Sandpapiremneme og/eller støttebørsteme er fastgjort i en liste, der er placeret i et fortrinsvist radialt spor i slibeskivens flade.The sandpaper strips and / or support brushes are attached to a list located in a preferably radial groove in the surface of the grinding wheel.

Sandpapiremneme er fastgjort i et fortrinsvist radialt spor i slibeskivens flade og støttebørsteme fastgjort i huller i slibeskivens flade.The sandpaper strips are fixed in a preferably radial groove in the surface of the grinding wheel and the support brushes are fixed in holes in the surface of the grinding wheel.

Sporet er typisk udformet med en indadvendende side, der umuliggør, at listen eller sandpapiremnemes kantdel kan frigøres fra sporet. For at sikre at lister og/eller sand-papiremnemes kantdel forbliver i sporet skal slibeskivens flade være udformet med et låseorgan, således at listen eller sandpapiremneme ikke kan blive slynget ud af sporet pga. af centrifugalkraften, når slibeskiven roterer.The groove is typically formed with an inward-facing side which prevents the strip or the edge of the sandpaper strips from being released from the groove. To ensure that the edge portion of the moldings and / or sandpaper blanks remains in the groove, the surface of the grinding wheel must be formed with a locking means so that the molding or sandpaper blanks cannot be thrown out of the groove due to the centrifugal force as the grinding wheel rotates.

Et sådant låseorgan kan være en o-ring, der er placeret i et spor i slibeskivens periferikant, en fjederplade, der ligger under listen og derved fastholder listen i sporet, eller en skrue eller lignende, der fastholder listen ned i sporet.Such a locking means may be an o-ring located in a groove on the circumferential edge of the abrasive disk, a spring plate lying below the strip and thereby holding the strip in the groove, or a screw or the like holding the strip down into the groove.

5 5DK 2008 00239 U3 I en alternativ udførelsesform af opfindelsen er sandpapiremneme og støtte børsterne befæstiget i en fælles fod, hvilket medfører, at det er muligt at udskifte et sandpapiremne og tilhørende støttebørster på én gang. Denne fod kan endvidere være udformet således, at det efterfølgende er muligt at udskifte sandpapiremnet og derved genbruge foden.In an alternative embodiment of the invention, the sandpaper strips and the support brushes are fixed in a common foot, which means that it is possible to replace a sandpaper strip and associated support brushes at one time. Furthermore, this foot may be designed so that it is subsequently possible to replace the sandpaper blank and thereby reuse the foot.

I stedet for slibepapiremner og/eller børster, der er udskifteligt befæstiget til skivens flade, kan der alternativt anvendes andre emner sammen med slibeskiven. Det kan for eksempel være: - stålbørster, eksempelvis til rensning af en metaloverflade - skurebørster, eksempelvis til rengøring af gulve - ondel-børster, eksempelvis til grovslibning af overflader.Instead of abrasive paper blanks and / or brushes that are interchangeably attached to the surface of the disc, other blanks may alternatively be used with the abrasive disc. It can be, for example: - steel brushes, for example for cleaning a metal surface - scouring brushes, for example for floor cleaning - onel brushes, for example for rough grinding of surfaces.

Opfindelsen forklares nærmere i det følgende i forbindelse med tegningen, hvor: fig. 1 er et planbillede af en slibeskive ifølge opfindelsen, og fig. 2 er et snitbillede af en slibeskive ifølge opfindelsen.BRIEF DESCRIPTION OF THE DRAWINGS The invention is explained in greater detail in the following with reference to the drawing, in which 1 is a plan view of a grinding wheel according to the invention, and FIG. 2 is a sectional view of a grinding wheel according to the invention.

På fig. 1 vises et en slibeskive 1, der har en flade 2, hvortil et antal sandpapiremner 3 er befæstiget og har en radial udstrækning over størstedelen af radius af fladen 2. Bag hvert sandpapiremne 3 er slibeskiven forsynet med en række støttebørster 4.In FIG. 1, a grinding wheel 1 is shown having a surface 2 to which a plurality of sandpaper blanks 3 are attached and having a radial extension over most of the radius of the surface 2. Behind each sandpaper blast 3, the grinding wheel is provided with a series of support brushes 4.

Antallet af sandpapiremner 3 og rækker af støttebørster 4 kan være vilkårlig. I den viste udførelsesform af opfindelsen er der otte sandpapiremner med tilhørende enkeltrækker af støttebørster 4.The number of sandpaper blanks 3 and rows of support brushes 4 may be arbitrary. In the illustrated embodiment of the invention, there are eight sandpaper blanks with associated single brush brush supports 4.

På fig. 2 vises slibeskiven 1 med to sandpapiremner 3, som er opslidset, således at sandpapiremneme 3 er opdelt i et antal slibestrips 5. Sandpapiremneme 3 er befæstiget til slibeskivens 1 flade 2, der har en tiltagende højde indefter fra fladens 2 periferi 6. Bag sandpapiremneme 3 er tilvejebragt støttebørster 4, som har en ensartet højde, hvorved pudsetrykket vil blive ensartet.In FIG. 2, the abrasive disk 1 is shown with two sandpaper blanks 3 which are slit, so that the sandpaper blades 3 are divided into a number of abrasive strips 5. Sandpaper blades 3 are attached to the abrasive disk 1 surface 2, which has an increasing height from the inside of the surface 2 behind the sandpaper blades 3. are provided support brushes 4 which have a uniform height whereby the plaster pressure will be uniform.

Claims

6 6GB 2008 00239 U3

A grinding disk (1) comprising a circular disk rotating about a central center axis and having a surface (2) to which edge portions of a plurality of sandpaper blanks (3) are attached, such that the sandpaper blades (3) are mounted predominantly perpendicular to the disk surface (2) and extending radially onto the surface, which sandpaper blanks (3) have approximately the same height, characterized in that the surface (2) has increasing height from within a periphery (6) of the surface (2) and that the sandpaper blanks (3) has an approximately radial extent over most of the radius of the surface (2).

Abrasive disc (1) according to claim 1, characterized in that the sandpaper strips (3) are slotted inwardly against the surface (2).

Abrasive disc (1) according to claim 1, characterized in that the sandpaper strips (3) consist of a plurality of sandpaper strips.

Abrasive disc (1) according to any one of claims 1-3, characterized in that the sandpaper strips (3) are supported by a number of support brushes (4) which are also mounted predominantly perpendicular to the surface of the disc (2).

Abrasive disc (1) according to any one of claims 1-4, characterized in that the sandpaper strips (3) and / or the support brushes (4) are arranged to be individually replaceable.

Abrasive disk (1) according to claim 5, characterized in that the sandpaper belts (3) and the support brushes (4) are fixed in a common foot.