EP1144161B1 - Consumable rotating disc for finishing material surfaces, comprising a base body consisting of an injection-moulded material, in particular plastic - Google Patents

Abstract

The invention relates to a consumable rotating disc for finishing material surfaces. A material finishing layer is fixed using binding means to a bearing surface on a front face of a disc-shaped base body which is used with the rotating disc. The base body consists of an injection-moulded material and has a central hub (6) for receiving a drive shaft of the rotating disc, the bearing surface is provided in an annular zone around the hub (6) and a first ring-shaped cross-sectional zone of the base body, which lies radially further towards the centre than the bearing surface, is configured as a first ribbed profile (30a, 30b, 32) with intersecting ribs and openings therebetween. According to the invention, a second, ring-shaped cross-sectional zone of the base body (4), which is located on the rear side of the bearing surface is configured as a second ribbed profile (30b, 30c, 30d, 32) with intersecting ribs and openings therebetween.

Description

The invention relates to a consumable rotary disk for machining material surfaces with the features of the preamble of claim 1. Such a fan end grinding wheel or elastic flap disc is on the market under the name MAGNUM COOL TOP . In this known fan forend grinding wheel all already in the preamble of claim 1 only optionally with "particular" listed features are realized. In particular, the annular zone provided with the support surface of the grinding lamellae is solidly made of plastic and continues radially inward following the annular support surface in a radially narrow relative first annular cross-sectional zone, which faces away from the support face of the body in the circumferential direction distributed cup-shaped recesses is provided so that between the recesses equidistant radially extending webs relatively large wall thickness, ie a wall thickness of about 2 mm, remain. The recesses have a mean extension of about 5 mm in the circumferential direction. The first rib profile formed thereby is closed at the end face of the main body provided with the bearing surface and open at the other end face. Radially inside is a hub disc without rib profile, which faces away from the end face of the main body with the rest of the end face is radially aligned and is set cup-shaped on the provided with the support face of the body while reducing the axial wall thickness. The hub has a central round opening.

The consumable in this consumable fan end grinding wheel between the support surface for the material processing pad and the hub arranged first rib profile increases without significant material savings, the flexibility of the fan end grinding wheel.

The invention is specifically concerned with base bodies of injection molded material. In addition to the spray resin or resin preferably considered, other sprayable material may be considered, for example, metal. However, the invention is based on such consumable rotary disks, in which the base body is shaped differently than in a spraying process, such as while forming the base body of a metal sheet or of a non-injectable glass fiber reinforced plastic.

In the case of rotary disks of the type considered in the invention, not only the material processing covering subject to abrasion is consumable, but also the basic body, which is expediently permanently connected to the material processing coating via a binder, in particular an adhesive. In addition to its own adhesive, for example, the binding agent used may also be the binder of a material processing coating in which abrasive articles bonded in a binder are used. Even if the material processing coating of at least one element with geometrically indeterminate cutting as well as the basic body is prefabricated in each case, which is preferred, material processing cover and base are jointly consumable on the connected via the binder to a unit rotating disk and are thus subject to only a single application , The conditions are therefore not comparable with such arrangements in which a reusable body with a material processing coating can be re-occupied after its consumption (see. US-A 5,138,735 , especially Fig. 1 , Reference numerals 32 and 34 as well as Sp. 2, Z. 64 to Sp. 3, Z. 2, US Pat. No. 4,979,336 , inshesondere Fig. 2 such as US-A 4,924,634 , especially Fig. 7 and WO 92/00163 , esp. Fig. 2 and finally EP 0 397 624 A2 , esp. 4 to 6 in connection with Sp. 2, Z. 47 - 51 and Sp. 3, Z. 38 - 53). From the last-mentioned publication, it is already known per se to form a recyclable disc-shaped base body made of rubber and to provide the rear with radially extending stiffening ribs, which at the same time have a cooling rib function (Sp. 2, Z. 38 to 51). The provided on the front end face of the main body material processing covering completely covers the uninterrupted on this side face; the ribs extend on the rear end side of the base body continuously without intermediate reinforcing in the circumferential direction from the outer edge of the base body into connection to a hub forming the central base. This prior art rotary disk with recyclable body is designed specifically for the special case as a honing tool, in which a soft fiber structure of the material processing pad can detachably hook with a support surface.

In contrast, the invention is primarily concerned with the application of the rotary disk as a grinding tool. Modern such grinding tools should be operable with a maximum working speed of 80 m / s, which corresponds to a minimum breaking speed of 150 m / s. The test specifications for corresponding semi-flexible grinding wheels, flap discs, flap discs and Vulkanfiberschleifscheiben arise in particular from "Principles for the performance of the type examination and certification of abrasive bonded abrasives and abrasives on backing" in July 1997 issued magazine ZH 1/670, Part 4, Sheets 2205 and 3101 of the Technical Committee " Iron and metal I "of the BGZ, order number ZH1-670 at Karl-Heymanns-Verlag KG, Cologne, as well as the corresponding issue ZH1 / 671, also issued in July 1997, pages 15 to 17 , The centrifugal forces occurring in the semi-flexible consumable rotating disks according to the invention are very high and must withstand these high stresses without breakage and detachment during operation, which requires a stable formation of the body.

On the other hand, the cost of the material of the body is high in comparison with that of the material processing coating and surpasses this even in rare cases. This share of costs is extremely critical in the case of a mass-produced article, which is the consumable rotary disk according to the invention, for reasons of competition. Added to this is the effort involved in environmentally friendly recycling.

These problems have been known for many years and have not yet been solved satisfactorily despite the property of the consumable rotating disks in question. For example, in the almost ten-year-old G 92 16 621.0 Ul at the junction of pages 1 and 2 of the description: "Synthetic plastic carriers have polluting properties and, when processed, cause disposal problems where the abrasive pad becomes worn while the carrier remains and must be disposed of Such abrasive tools wear off in a short time and are needed in large numbers. " In this publication, the basic body was designed in two parts to remedy these difficulties, with one part itself being able to be worn and penetrating the other part, and in particular intended for the use of decomposable natural material, which restricts the possible uses.

Already 25 years ago, according to the US-A 3,889,430 similar considerations (see eg Sp. 2, Z. 32 - 66) with the conclusion, a ribbed and possibly so inscribed in the preparation of the consumable rotary disk in the material processing cover so that it extends at both ends of the base body and thereby hangs together due to bridge formation through openings in the base body made of plastic injection-molded base body structure. However, this requires a relatively complicated production of the consumable rotary disk. In contrast, the invention is concerned with the conventional construction, in which the respective material-processing coating on an annular support surface is applied externally by a binder, for example an adhesive, generally durably. The support surface may be unbroken, ie closed, in particular in the context of the invention. However, the invention also includes the possibility of perforated, perforated or perforated, or otherwise provided with recesses, form for the purpose that a binder, such as adhesive, better adheres to the outside mounted on the support surface material treatment coating.

The invention is therefore based on the object to substantially reduce the mass of the body in such a conventional structure of a consumable rotary disk, thereby significantly improve the pricing opportunity of mass-produced consumable rotary disk and at the same time substantially reduce the accumulation of recyclable material, and all in a design that allows to meet the requirements of maximum working speed of up to 80 m / s and minimum breaking speed of up to 150 m / s in comparable, and even in individual cases, better. In particular, the requirements of a Fielerstirnschleifmaschine with one-sided or even on both sides (claim 18) frontal covering with overlapping grinding lamellae is met.

This object is achieved according to the invention in a consumable rotary disk having the features of the preamble of claim 1 by its characterizing features solved.

In addition to a first rib profile, which is arranged between the support surface of the material processing cover and the hub and determines the semi-flexible characteristic of the rotation disk, a second rib profile is additionally created on the rear side of the support surface. Both rib profiles are designed to be open between the ribs and can thus be designed with substantial material savings and associated reduction of manufacturing and recycling costs so that they can at least as well as massive body to meet the force requirements of a high-performance rotary disc of the total consumable type. Due to the design options in the design of the profiles while the expert many adaptations to the stresses depending on the nature of the application are given.

In the generic rotary disk with the name MAGNUM COOL TOP, hereinafter referred to as generic rotation disk, the hub is a simple central hole in a flat annular disc, which forms the central part of the body. If the hub is retracted into the first rib profile, in addition to a better stiffening in the central region of the rotation disk, a better possibility of mounting the rotation disk on the drive shaft, since the hub is formed axially expanded.

In the generic rotary disk further the first annular cross-sectional zone between the hub and the support surface for the material processing coating is stepped, while on the other end side forming the hub flat annular disk steplessly merges into the radially adjacent region and the first rib profile open to this end face and closed to the former end face is arranged alone in this stage. According to the invention, instead of in the radial direction at least on the end face of the base body, on which the support surface is formed, a cranked in the radial direction Forming the rotary disc provided in which in the radial direction, the first rib profile is included.

In the generic rotary disk, the first rib profile between two broad concentric annular ribs is formed in the region of said step, that spoke-shaped in the annular gap between these two ribs extend relatively wide radial webs. Alternatively, one could also remember that the ribs of the first and / or the second rib profile according to the invention instead of such an arrangement with concentric ribs and radially extending stiffening ribs otherwise somehow straight, curved or mixed straight and curved run or the ribs of the first and / or. or second rib profile directly, offset or mixed directly and offset. It is sufficient if the plurality, preferably all, of the ribs of the first and / or the second rib profile are formed as narrow webs. Generally, the radially extending and / or extending in the circumferential direction ribs can be interrupted like a truss or assembled in a truss-like manner.

In the case of the second rib profile according to the invention, apart from the mentioned possible modifications, it is preferred that, as in the case of the first rib profile, a combination of concentric circumferential ribs and radial ribs, also called ribs, is provided. This makes it possible to merge the first rib profile and the second rib profile as a uniform rib profile into each other, in which case can be provided in particular, but need not, that preferably all or at least some radially extending ribs of the first and second rib profile continue each other. It can be achieved in a preferred manner that the first and the second rib profile is an annular rib in common. In this case, it is even possible that the first rib profile has only one further radially inwardly annular rib, which may then preferably serve as a boundary of a central opening of the hub in the sense discussed above. This does not exclude that in the case of the first rib profile also at least one further annular rib is included in the rib profile.

If the first and the second rib profile in the sense mentioned is an annular rib common, it is also sufficient if the second rib profile according to the invention has only two further radially outwardly annular ribs. Various modifications are possible here. Preferably, the one rib supports the support surface for the material processing cover in a radially central region and the other two ribs including the rib common to the first rib follow the radially inner and the radially outer boundary of the support surface.

All of the above constructive measures make it possible that the existing of the first rib profile and the second rib profile entire open rib profile extends over the entire radius of the body between the outer edge of the support surface and an inner central opening of the hub. In this way, and in general by the measures according to the invention, a base body is obtained which has only a small mass parallel to the drive shaft when distributed across its entire diameter, but has grown to the highest possible operating speeds in labor input.

It is in principle possible to leave the first rib profile and the second rib profile open on the end face of the base body which faces away from the support surface for the material processing covering. This allows a one-piece injection molding of the body. Preferably, however, an at least partial cover of this back open rib profile is provided. This cover may in turn be an injection molded part, but need not be. It is preferred that the cover over the whole Extent of the open rib profile extends and this closes. In this sense, it is expedient to provide at least one covering of the open first and / or second rib profile which is complementary to the basic body on the end face of the rotation disk facing away from the supporting surface. This cover can be chosen so that it supplements the body so that it appears from the outside as a massive three-dimensionally extended disk-shaped body.

This cover itself can be film-thin, for example if it has the sole purpose of serving as a label or label carrier. This foil-like thickness of the rear cover also generally suffices generally for the wall thickness of the basic body provided with the two rib profiles. So you can also make the present at the provided with the support surface for the material processing cover front cover of the first and / or second rib profile film thin. In this case, however, this wall thickness can also be chosen to be different in different wall areas and / or in comparison of the front with the rear end side. As a measure of the wall thickness can be appropriate to choose the static required wall thickness of the radially extending webs of the rib profile and / or extending in the circumferential direction webs. In the limiting case, these webs and the two end-side covers may be formed substantially the same or even the same. The cover of the respective rib profile on the side facing away from the support end face of the rotary disc need not be flat, which may be sufficient in case of a pure label carrier function, but expediently complements at least a radial portion of the first rib profile and / or at least one radial portion of the second rib profile with corresponding supplementary profiles. This results in union of the body with its back cover by mating or preferably in a permanent manner, such as by welding, increased stability of the body and its cover for themselves. It can it suffice that the supplement of the rib profile accounts for only a small proportion of the axial extent of the ribs.

Preferred is an arrangement in which the cover completes the entire first rib profile and a radially inner portion of the second rib profile between two adjacent annular circumferential ribs, wherein preferably the radially outer portion of the second rib profile is also covered flat without forming a complementary profile and so in the peripheral region the rotation disc allows a certain axial compliance.

The cover provided as a supplement to the main body may also have other functions besides the support function for a label. One function may be that of a rear protective cover of the other open main body of the rotary disk.

It is even possible, in turn, to use the back cover as a support for another material treatment covering, which may be the same, the same or different in relation to the previously discussed material processing cover arranged on the face of the actual main body of the rotation disk.

On the support surface on the base body and / or in the event that the back cover of the body also serves as a carrier for a material processing coating, concentric circumferential grooves can be provided in a known manner, which adhesive or other binder for the material processing coating can accommodate so that the material processing coating on the relevant wing on the body or its rear cover during operation reliably, ie secured against detachment and relative rotation, liable. As already mentioned, instead of this concentric groove, it is also possible to provide continuous or partial recesses, such as recesses, holes or other recesses.

• Fig. 1 eine perspektivische Ansicht einer Rotationsscheibe zur Bearbeitung von Materialoberflächen;
• Fig. 2 eine frontstirnseitige Draufsicht auf den Grundkörper der Rotationsscheibe;
• Fig. 3 eine rückseitige Draufsicht auf den Grundkörper gemäß Fig. 2;
• Fig. 4 eine perspektivische Ansicht des Grundkörpers der Fig. 1 und 2 schräg von vorne und
• Fig. 5 eine entsprechende perspektivische Ansicht desselben Grundkörpers schräg von hinten;
• Fig. 6 einen Schnitt nach der Linie E-E in Fig. 3 mit vergrößerter Herauszeichnung einer Einzelheit in Fig. 6a;
• Fig. 7 einen Schnitt nach der Linie F-F in Fig. 3 mit vergrößerter Herauszeichnung einer Einzelheit in Fig. 7a;
• Fig. 8 eine axiale Draufsicht auf eine hintere Abdeckung des Grundkörpers der Fig. 2 bis 7a, und zwar bezogen auf dessen Montagezustand von innen;
• Fig. 9 schräg von innen eine perspektivische Ansicht der Abdeckung gemäß Fig. 8;
• Fig. 10 einen Schnitt nach der Linie C-C in Fig. 8 mit einer vergrößerten Einzelheit in Fig. 10; sowie
• Fig. 11 einen diagonalen Schnitt durch den Zusammenbau aus dem Grundkörper der Fig. 2 bis 7a mit vergrößerter Herauszeichnung einer Einzelheit in Fig. 11a.

The invention is described below with reference to schematic Drawings on an embodiment explained in more detail. Show it:

• Fig. 1 a perspective view of a rotating disk for processing material surfaces;
• Fig. 2 a frontal frontal view of the main body of the rotary disk;
• Fig. 3 a rear plan view of the main body according to Fig. 2 ;
• Fig. 4 a perspective view of the body of the Fig. 1 and 2 diagonally from the front and
• Fig. 5 a corresponding perspective view of the same body obliquely from behind;
• Fig. 6 a section along the line EE in Fig. 3 with enlarged drawing of a detail in Fig. 6a ;
• Fig. 7 a section after the line FF in Fig. 3 with enlarged drawing of a detail in Fig. 7a ;
• Fig. 8 an axial plan view of a rear cover of the main body of Fig. 2 to 7a , and based on its mounting state from the inside;
• Fig. 9 obliquely from inside a perspective view of the cover according to Fig. 8 ;
• Fig. 10 a section to the line CC in Fig. 8 with an enlarged detail in Fig. 10 ; such as
• Fig. 11 a diagonal section through the assembly of the main body of Fig. 2 to 7a with enlarged drawing of a detail in Fig. 11a ,

The rotary disk 2 according to Fig. 1 has a disk-shaped base body 4 with a central hole 6 for the direct or indirect reception of a drive shaft, not shown. At the two end faces of the rotary disk 2, a first ring zone 8 or a second annular zone 10 is formed at a distance around the central hole 6 up to or beyond the edge, which at associated annular wings with first and second grinding lamellae 12 and 14 are occupied. The grinding blades each extend radially and overlap fan-shaped in the circumferential direction, wherein the orientation of the overlap at the first annular zone 8 is reversed as at the second annular zone 10. In this respect, the rotary disk 2 corresponds to the known structure as the JP-63-168055-A ,

This is the basic structure of a known rotary disk, which has material processing coverings on its two end faces. The invention is concerned with the below-described feature that the main body 4 of the rotary disk 2 is in any case occupied on its one end face with material processing coating, in particular with the fan-shaped overlapping grinding blades in the sense of forming a front side of the rotary disk of Fig. 1 , At the other end face, the base body has the open profile to be described in more detail below according to FIGS Fig. 2 to 7a on. This open profile can be changed according to Fig. 11 With Fig. 11a at the rear end side by the cover according to the Fig. 8 to 10a to be finished. It is not necessary, but possible that the final cover is in turn occupied by material processing coating. The cover can also serve only as profile coverage with or without function as a label and / or label carrier. If, in turn, the cover forms a support surface for a material treatment covering outside in a manner not shown, in particular once again in a fan-shaped overlapping grinding lamella, a rotation disk with the basic structure of Fig. 1 in which the rotary disc has at its two end faces fan-shaped overlapping grinding lamellae, which even, if desired, in the illustration of Fig. 1 can be oriented in opposite directions.

If only the main body 4, but not its back cover are covered with material processing coating, in the illustration of Fig. 1 the second grinding blades 14, which in Fig. 1 arranged in the second annular zone 10 are to imagine. In place of the fan-shaped overlapping first grinding blades 12, which are the only grinding blades 12 in this case, can also any other material processing coating grinding or polishing characteristic occur, especially one which is prefabricated in one piece and then a binder, in particular Adhesive, is connected to the base body. However, it is preferred that the use of abrasive lamellae 12 overlapping in a fan-shaped manner in the remaining first ring zone 8 as shown.

Subsequently, the main body 4 based on FIGS. 2 to 7a described in detail.

In the Fig. 2 and 4 , which show the (front) end face of the main body 4, the (first) annular zone 8 can be seen, which is formed with the central hole 6 concentric and radially equidistant end-side annular grooves 18 and at the same time formed on the annular zone 8 annular support surface 20th for the grinding blades 12 describes. The annular grooves 18 serve for better anchoring of the adhesive or other binder, with which the grinding blades 12 are mounted on the support surface 20. In place of the annular grooves or in addition to it can also be a further profiling up to openings, such as perforation or perforation with any Lochungsquerschnitt occur. Such a profiling can also serve for better adhesion of the binder to the support surface of the grinding lamellae 12 or other material processing coating arranged on the outside of the support surface 20 on the outside. If no perforations, perforations and the like. are provided, as shown, the entire annular zone 8 is formed closed.

Like the annular zone 8, the frontal region of the main body 4 lying between it and the central hole 6 is also closed. However, this embodiment of the described embodiment can also be varied in case of need to the arrangement of openings be, for example, if additional mounting holes must be provided for a holding device.

Out Fig. 6a It can be seen that the annular grooves 8 have a relatively no depth in relation to the wall thickness at the end face of the base body 4 and are approximately pot-shaped with relatively wide, namely formed as the outer width of the annular grooves corresponding intermediate webs.

Out Fig. 6 It should also be noted that the support surface 20 is inclined at an acute angle a from ... to ..., eg 12 °, with respect to a line perpendicular to the axis of the hub 6, which extends radially at each radius.

Furthermore, from the sectional views of FIGS. 6 and 7 to recognize that the support surface 18 is arranged offset from the radial center plane of the base body 4 frontally forward. In this case, the cross-section is axially symmetrical zurückgekröpft from the inner edge of the annular zone 8 and the support surface 20 toward the hub 6, wherein the radially within the annular zone 8 lying in turn annular zone 22 from the circular inner edge 24, first an annular conically receding portion 26 and then a flat Ring disc 28 describes which is parallel to the imaginary plane of connection of the circular inner edge 24 of the radially outer annular zone 8. The annular zone 22 therefore has a rearwardly cranked from the front end side of the base body 4 design.

Between the outer edge of the annular zone 8 and the central hole 6 of the entire base body 4 is formed as a rearwardly open rib profile. This rib profile consists of with the hole 6 concentric annular ribs 30 and 6 outgoing from the hole and distributed over the circumference at equal angular intervals radial ribs 32 which extend over the entire radial extent between the hole 6 and the outer edge of the base body 4 and each in the radial direction traversed straight through, even through the bent area according to the particularly clear illustration in Fig. 5 ,

The individual annular ribs 30 require a closer look.

The radially innermost lying annular rib 30a forms a sleeve-shaped axial extension of the hole 6 a sleeve-shaped hub of the rotary disk 2 and the main body 4. The radially further outwardly following annular rib 30b is slightly radially further outward than the circular inner edge 24 of the annular zone 8 and describes approximately the radial inner edge of the support surface 20. The two annular ribs 30a and 30b describe a first annular cross-sectional zone 34 of the base body 4, which is arranged radially further inwardly than the support surface 20.

Axially behind the annular zone 8 and the support surface 20, a second annular cross-sectional zone 36 is formed, between the first ring-shaped cross-sectional zone 34 common annular rib 30b and located on the radial Au Benrand of the main body 4 annular rib 30d, which at the same time a cylindrical and with describes the hub 6 coaxial lateral surface of the body. The support surface 20 is provided on the entire end face in the respective axial extension of the two annular ribs 30b and 30d surface area of the annular zone 8. An intermediate rib 30c, which is nested centrally approximately between the annular rib 30b and the outermost annular rib 30d, supports the radially middle region of the support surface 20. The two cross-sectional zones 34 and 36 together describe the entire open profile on the rear side of the main body 4. The free edge lies here the hub forming radially innermost annular rib 30a and the outer shell of the body 4 forming the radially outermost annular rib 30d wholly or substantially in the same radial plane, as can be seen from the illustrated radially extending reference lines.

In the Fig. 2 illustrated section line DD can either as a cutting line EE or as a cutting line FF according to Fig. 3 be understood. It looks like Fig. 3 , that the Section line EE along a radial rib or two aligned radial ribs 32 extends, while the section line FF in the angular space between two adjacent radial ribs 32 extends. It can also be seen that very generally two diagonally opposite radial ribs are aligned with each other. This difference in the cutting guides gives the different sectional views in the FIGS. 6 and 7 , In Fig. 6 In this case, the height of each two aligned radial ribs 32 is shown, while in Fig. 7 the actual end wall thickness of the base body 4 can be seen. In the space between the radial ribs according to Fig. 7 and Fig. 7a is also a at the rear of the radially outermost annular rib 30d close to the rear end face inwardly projecting local or annular nose 38 can be seen, which is respectively disposed between the radial ribs 32 and for attachment of the back cover to be described later back open ribbed profiles of the base body 4 can be used, but does not necessarily have to be used.

The cover 40 consists on the back of two concentric flat, each extending in a radial plane annular disc 42 and 44, which adjoin one another axially over the annular rib 30b via a small step 45 and which form a closed in itself outer face on the back of the main body 4 can. The annular disc 42, which forms the hole 6, is according to Fig. 10 slightly axially outwardly and the annular disc 44 axially offset inwards. The outer face 42, 44 on the back of the body serves only as a carrier for labels and / or other printing. As previously mentioned, in a manner not shown, the rear end-side outer surface of the cover 40 in the region of the annular disc 42 also form an annular support surface for rear-mounted grinding lamellae 14 of the rotary disk, which then formed on the radially outer annular disc 44 second Ring zone 10 in similar As described with respect to the first grinding blades 12 with respect to the support surface 20 with the annular grooves 18 or other, adhesion-enhancing surface design described earlier.

At the open rear rib profile of the base body 4 facing inside of the cover 40 is only a rudimentary rib profile complementary to the open rib profile on the back of the body 4 is provided. This rudimentary rib profile is complementary to the opposite radial ribs 32 and annular ribs 30 of the body, wherein a radial displacement of the radial ribs in the assembled state according to Fig. 7 possible, but not necessary and normally not provided.

Special features are the following:

The annular space between the rudimentary annular ribs 46c and 46d, which can connect to the annular ribs 30c and 30d of the main body 4 complementary, is kept free of radial ribs, so that there the annular disc 44 is formed lamellar flat. Of the two cross-sectional zones 34 and 36 of the base body 4 common rib 30b is located on the cover 40 no rudimentary ring rib, but only the step 45 opposite. The hub essentially forming annular rib 30 on the base body 4 is finally the rudimentary annular rib 46a on the cover 40 opposite, which contributes to the hub also something with. Rudimentary radial ribs, which are completely aligned with each other diagonally, with a corresponding angular distribution as the radial ribs 32 on the base body 4 on the inside of the two annular portions 26 and 28, interrupted by the step 45, are present.

The illustrations in the main figures 2 to 11 are to scale with respect to a possible practical embodiment, the advance drawing of details each with a fivefold magnification in the FIGS. 6a . 7a . 10a and 11a , One recognizes, inter alia, that the outer wall thicknesses of the base body 4 and the rear cover 40th lamellar are thin and thereby in wall thickness with the web-like thickness of the annular ribs 30, radial ribs 32 and rudimentary annular ribs 46 and rudimentary radial ribs 48 is comparable. You can choose the wall thickness even completely the same or at least substantially the same and so when building a stable in itself for high-speed loads rotation disk 2 with very little material consumable together with the rotary disk 2 basic body 4, possibly together with back cover 40, get along.

Claims (22)

1. Consumable rotating disc (2) for finishing material surfaces, in which a material finishing layer subject to abrasion and comprising at least one element (12) having geometrically indeterminate cutters on a supporting surface is fixed by a binder, in particular an adhesive, to a front face of a consumable disc-like base body (4), which is consumed with the rotating disc,
   the base body (4) consisting of injection-moulded material, in particular plastic, and having a central hub (6) to hold a drive shaft of the rotating disc, directly or indirectly,
   the supporting surface being provided in an annular zone (8) around the hub (6), and
   a first annular cross-sectional zone (34) of the base body (4), which is arranged radially further in than the supporting surface (20), being formed as a first ribbed profile (30a, 30b, 32) having intersecting ribs and an open structure between the ribs, and
   in particular the first annular cross-sectional zone (34) and the annular zone (8) in which the supporting surface (20) is arranged adjoining each other radially,
   in particular the first ribbed profile (30, 32), on the front face of the rotating disc (2) which forms the supporting surface (20), being of closed design,
   in particular the first ribbed profile (30, 32) having ribs (32) distributed radially over its circumference and running radially, which are reinforced with respect to one another by at least two ribs (30a, 3b) running concentrically annularly,
   in particular the material finishing layer being formed by finishing flaps, in particular grinding flaps, which are arranged in the circumferential direction on the supporting surface (20), in each case with a radial extent and overlapping in the form of a fan,
   in particular the supporting surface (20) being arranged offset axially with respect to the central plane of the hub (6), and
   in particular the supporting surface (20) being arranged at an oblique angle (α) in relation to the central plane of the hub (6),
   characterized in that
   a second annular cross-sectional zone (36) of the base body (4), which is arranged on the rear side of the supporting surface (20), is formed as a second ribbed profile (30b, 30c, 30d, 32) having intersecting ribs and an open structure between the ribs.
2. Rotating disc according to Claim 1, characterized in that the hub (6) is incorporated into the first ribbed profile (30a, 30b, 32).
3. Rotating disc according to Claim 1 or 2, characterized in that the first ribbed profile (30a, 30b, 32) is shaped in the radial direction in accordance with an angled design of the base body (4).
4. Rotating disc according to one of Claims 1 to 3, characterized in that the ribs (30, 32) of the first and/or second ribbed profile (34, 36) extend rectilinearly, in a curve or with a mixture of rectilinearly and with a curve.
5. Rotating disc according to one of Claims 1 to 4, characterized in that the ribs (30, 32) of the first and/or second ribbed profile (34, 36) cross directly, with an offset or with a mixture of directly and with an offset.
6. Rotating disc according to one of Claims 1 to 5, characterized in that the second ribbed profile (30b, 30c, 30d, 32) has ribs (32) distributed over the circumference of the second cross-sectional zone (36) and running radially, which are reinforced with respect to one another by at least two ribs (30b, 30c, 30d) running concentrically annularly.
7. Rotating disc according to one of Claims 1 to 6, characterized in that the first and the second ribbed profile (30, 32) merge into one another as a uniform ribbed profile.
8. Rotating disc according to Claims 6 and 7, characterized in that preferably all the ribs (32) extending radially and belonging to the first and the second ribbed profile continue in one another.
9. Rotating disc according to one of Claims 6 to 8, characterized in that a rib (30b) running annularly is common to the first and the second ribbed profile.
10. Rotating disc according to Claim 9, characterized in that the first ribbed profile has only one further rib (30a) running annularly radially further in, preferably as a boundary of a central opening (6) of the hub.
11. Rotating disc according to Claim 9 or 10, characterized in that the second ribbed profile has only two further ribs (30c, 30d) running annularly radially further out, one rib (30c) preferably supporting the supporting surface (20) in a radially central region, and the two other ribs (30b, 30d) following the radially inner and the radially outer boundary of the supporting surface (20).
12. Rotating disc according to one of Claims 1 to 11, characterized in that the majority, preferably all, of the ribs (30, 32) of the first and/or the second ribbed profile are formed as narrow webs.
13. Rotating disc according to one of Claims 1 to 12, characterized in that the ribs (30, 32) running radially and/or running in the circumferential direction are interrupted in the manner of a framework.
14. Rotating disc according to one of Claims 1 to 13, characterized by at least one cover (40) supplementing the base body (4) and belonging to the open first and/or second ribbed profile on the side of the rotating disc (2) facing away from the supporting surface (20).
15. Rotating disc according to Claim 14, characterized in that the cover (40) supplements at least one radial section of the first ribbed profile and/or at least one radial section of the second ribbed profile.
16. Rotating disc according to Claim 15, characterized in that the cover (40) supplements the whole of the first ribbed profile and a radially inner section of the second ribbed profile between two adjacent ribs (30b, 30c) running around annularly, and preferably covers the radially outer section of the second ribbed profile flatly.
17. Rotating disc according to Claim 15 or 16, characterized in that the supplementation makes up only a small proportion of the axial extent of the ribs (30, 32).
18. Rotating disc according to one of Claims 14 to 17, characterized in that the cover is in turn provided as a supporting constituent of the base body (4) and having a second supporting surface, arranged on its other end, of a second material finishing layer subject to abrasion and comprising at least one element (14) having geometrically indeterminate cutters, finishing flaps, in particular grinding flaps (14), preferably being provided as the second finishing layer, which are arranged in the circumferential direction on the second supporting surface, in each case with a radial extent and overlapping in the form of a fan.
19. Rotating disc according to one of Claims 1 to 18, characterized in that, on the outer surface facing the respective material finishing layer, the supporting surface (20) on the one side of the base body (4) and/or a further supporting surface according to Claim 18 on the other side of the base body is provided with a retaining profile running radially for the material layer, preferably as a result of grooves (18) and intermediate ribs running around alternately.
20. Rotating disc according to one of Claims 1 to 19, characterized in that the entire open ribbed profile (30, 32) comprising the first ribbed profile and the second ribbed profile extends over the entire radius of the base body (4), between the outer edge of the supporting surface (20) and an inner central opening (6) of the hub.
21. Rotating disc according to one of Claims 1 to 20, characterized in that the respective covering and/or cover of the first and/or the second ribbed profile on a side of the base body (4) provided with a supporting surface (20) or on the cover (40) is designed to be thin like a thin sheet.
22. Rotating disc according to Claim 21, characterized in that the cover (40) and the ribs (30, 32) of the first and/or the second ribbed profile have approximately the same wall thickness.

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