WO2001036160A2

WO2001036160A2 - Consumable rotating disc for finishing material surfaces, comprising a base body consisting of an injection-moulded material, in particular plastic

Info

Publication number: WO2001036160A2
Application number: PCT/EP2000/011144
Authority: WO
Inventors: Steffen Neu
Original assignee: Klingspor Gmbh
Priority date: 1999-11-16
Filing date: 2000-11-10
Publication date: 2001-05-25
Also published as: CZ20012578A3; WO2001036160A3; SK10052001A3; DE29920124U1; EP1144161B1; EP1144161A2; JP2003513811A; ATE432793T1; EP1144161A3; DE50015654D1

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

Usable rotating disc for processing material surfaces with a base body made of injection molded

Material, especially plastic

The invention relates to a consumable rotary disc for processing material surfaces with the features of the preamble of claim 1. Such a flap disc or elastic flap disc is on the market under the name MAGNUM COOL TOP. In this known flap face grinding wheel, all of the features listed in the preamble of claim 1 have only been implemented optionally with "in particular". Specifically, the ring zone provided with the support surface of the grinding flaps is solidly made of plastic and continues radially on the inside in connection with the ring-shaped support surface in a first cross-sectional zone which is relatively narrow in the radial direction and which extends in the circumferential direction on the end face of the base body facing away from the support surface distributed cup-shaped recesses is provided so that equidistant radially extending webs of relatively large wall thickness, ie a wall thickness of about 2 mm, remain between the recesses. The recesses have an average extent of approximately 5 mm in the circumferential direction. The first rib profile formed in this way is closed on the end face of the base body provided with the supporting surface and is open on the other end face. Radially on the inside there is a hub disc without a rib profile, which is also on the end face of the base body facing away from the wing the rest of the end face is radially aligned and is recessed in a bowl shape on the end face of the base body provided with the supporting surface while reducing the axial wall thickness. The hub has a central round opening.

The first rib profile arranged in this consumable flap disc between the wing for the material processing surface and the hub increases the flexibility of the flap disc without any significant material savings.

The invention is particularly concerned with base bodies made of injection-molded material. In addition to the spray plastic or synthetic resin that is preferably considered, other sprayable material can also be considered, for example made of metal. However, the invention sets itself apart from such usable rotary disks in which the base body is shaped differently than in a spraying process, such as by forming the base body from a sheet metal or also from a non-sprayable glass fiber reinforced plastic.

In the case of rotary disks of the type contemplated in the invention, not only the material processing covering subject to abrasion when used is usable, but also the base body, which is expediently permanently connected to the material processing covering by means of a binder, in particular an adhesive. In addition to its own adhesive, the binder of a material processing covering can also be used as the binder, for example, in which abrasive bodies bound in a binder are used. Even if the material processing surface is prefabricated from at least one element with geometrically indefinite cutting as well as the base body, which is preferred, the material processing surface and base body can be used together on the rotating disk connected to form a unit and are therefore only ever subject to a single application , The conditions are therefore not comparable to arrangements in which a reusable base body can be re-populated with a material processing covering after its consumption (cf. US-A 5 138 735, in particular Fig. 1, reference numerals 32 and 34 and column 2, line 64 to column 3, line 2, US -A 4 979 336, in particular Fig. 2 and US-A 4 924 634, in particular Fig. 7 and WO 92/00163, in particular Fig. 2 and finally EP 0 397 624 A2, in particular Fig. 4 to 6 in connection with column 2, lines 47-51 and column 3, lines 38-53). From the last-mentioned publication, it is already known per se to form a reusable, disk-shaped base body made of rubber and to provide it on the back with radially extending stiffening ribs, which at the same time have a cooling fin function (columns 2, lines 38 to 51). The material processing covering provided on the front end face of the base body completely covers the end face which is unbroken on this side; the ribs extend continuously on the rear face of the base body without intermediate stiffening in the circumferential direction from the outer edge of the base body to a central base forming the hub. This known rotary disc with a reusable base body is specially designed for the special case as a honing tool, in which a soft fiber structure of the material processing covering can be detachably caught on a carrier surface.

In contrast, the invention is primarily concerned with the use of the rotary disc as a grinding tool. Modern grinding tools of this type should be able to be operated at a maximum working speed of 80 m / s, which corresponds to a minimum breaking speed of 150 m / s. The test regulations for corresponding semi-flexible grinding wheels, flap grinding wheels, flap grinding wheels and volcanic fiber grinding wheels result in particular from "Principles for the implementation of the type test and certification of grinding wheels made of bonded abrasives and coated abrasives" in the magazine ZH 1/670, part issued in July 1997 4, sheets 2205 and 3101 of the technical committee "Iron and Metal I" of the BGZ, order no. 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 that occur with the semi-flexible, usable rotating disks according to the invention are very high and must withstand these high loads without breaking and Withstand detachment in operation, which requires a stable design of the base body.

On the other hand, the cost share of the material of the base body is high in comparison with that of the material processing covering and even exceeds this in not uncommon cases. In the case of a mass-produced article, which is the consumable rotating disk according to the invention, this cost component is extremely critical, for competition reasons alone. Added to this is the effort involved in recycling that is as environmentally friendly as possible.

These problems have been known for many years and, despite the property of the consumable rotating disks in question, have not yet been solved quite satisfactorily. Thus, in the almost ten-year-old G 92 16 621.0 Ul at the transition from pages 1 and 2 of the description, the following was stated: "Carriers made of synthetic plastic have environmentally harmful properties and cause disposal difficulties when processed. It must be borne in mind that grinding tools are consumer goods which wear the abrasive coating while the carrier remains and must be disposed of. Such abrasive tools wear out in a short time and are required in large quantities. " In this publication, the basic body was designed in two parts to remedy these difficulties, one part itself being wearable and penetrating the other part, and in particular the use of decomposable natural material, which limits the possible uses.

Similar considerations were made 25 years ago in accordance with US Pat. No. 3,889,430 (cf., for example, Col. 2, lines 32-66) with the conclusion that a ribbed and given if the plastic injection-molded base structure is to be embedded in the material processing covering during the manufacture of the consumable rotary disk, that the latter extends on both end faces of the base body and is connected as a result of bridging through openings in the base body. However, this requires a relatively complicated manufacture of the consumable rotary disc. In contrast, the invention is concerned with the conventional structure in which the respective material processing covering is generally permanently applied to an annular wing by a binder, for example an adhesive. The wing can be designed in particular unbroken, ie closed, within the scope of the invention. However, the invention also includes the possibility of perforating the wing, for example perforated or perforated, or otherwise provided with recesses, for the purpose that a binder, such as adhesive, adheres better to the material processing covering applied to the outside of the wing.

Accordingly, the object of the invention is to substantially reduce the mass of the base body in such a conventional structure of a consumable rotating disk, thereby substantially improving the pricing option of the mass article of the consumable rotating disk and at the same time significantly reducing the amount of material that requires recycling, and all of this a design that makes it possible to meet the requirements for maximum working speeds of up to 80 m / s and minimum breaking speeds of up to 150 m / s in a comparable, even better way in individual cases. In particular, the requirements for a flap face grinding machine with one-sided or even double-sided covering (claim 18) with overlapping grinding flaps are met.

This object is achieved according to the invention in a consumable rotary disc with 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 wing of the material processing covering and the hub and also determines the semi-flexible characteristic of the rotating disc, a second rib profile is additionally created on the rear of the wing. Both rib profiles are open between the ribs and can be designed with substantial material savings and the associated reduction in manufacturing and recycling costs in such a way that they take into account the force requirements for a high-performance rotating disk of the overall usable type, at least as well as solid base bodies can. Due to the design options for the design of the profiles, the skilled person is given many options for adapting to the stresses depending on the type of application.

In the case of the generic rotary disc with the designation MAGNUM COOL TOP, hereinafter referred to briefly as the generic rotary disc, the hub is a simple central hole in a flat annular disc, which forms the central part of the base body. If the hub is drawn into the first rib profile, in addition to a better stiffening in the central region of the rotating disk, there is also a better possibility of mounting the rotating disk on the drive shaft, since the hub is axially extended.

In the generic rotary disc, the first annular cross-sectional zone between the hub and the wing for the material processing surface is also graduated, while on the other end the flat annular disc forming the hub merges smoothly into the radially adjoining area and the first rib profile is open towards this end and is arranged closed in this stage alone to the first end. According to the invention, instead, in the radial direction, at least on the end face of the base body on which the supporting surface is formed, a radial cranked formation of the rotary disc is provided, in which the first rib profile is included in the radial direction.

In the case of the rotary disc of the generic type, the first rib profile between two wide concentric annular ribs is formed in the area of the step mentioned in that relatively wide radial webs run in the annular gap between these two ribs. Alternatively, one could also think 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 are otherwise somehow rectilinear, curved or mixed rectilinear and crooked or that the ribs of the first and / or cross the 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 shaped as narrow webs. In general, the radially extending and / or the ribs running in the circumferential direction can be interrupted in the manner of a framework or can be composed in the manner of a framework.

In the case of the second rib profile according to the invention, apart from the possible modifications mentioned, it is preferred that, as in the case of the first rib profile, a combination of concentric circumferential ribs and radial ribs, also called webs, is provided. This makes it possible to have the first rib profile and the second rib profile merge into one another, in which case it can be provided, but not necessarily, that preferably all or at least some radially extending ribs of the first and second rib profiles continue into one another. It can be achieved in a preferred manner that the first and the second rib profile have an annular rib in common. In this case it is even possible for the first rib profile to have only one further rib running radially further inwards. points, which can then preferably serve as a delimitation 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, at least one further annular rib is also included in the rib profile.

If a ring-shaped rib is common to the first and the second rib profile in the above-mentioned sense, it is also sufficient if the second rib profile according to the invention has only two further ribs running radially further outwards. Various modifications are possible here. Preferably, the one rib supports the wing for the material processing covering in a radially central region and the two other ribs, including the rib common to the first rib profile, follow the radially inner and the radially outer boundary of the wing.

All of the constructional measures mentioned make it possible for the entire open rib profile consisting of the first rib profile and the second rib profile to extend over the entire radius of the base body between the outer edge of the wing and an inner central opening of the hub. In this way and in general through the measures according to the invention, a base body is obtained which, with a pronounced extension length distributed over its entire diameter and parallel to the drive shaft, has only a small mass, but which is able to cope with the highest possible operating speeds in use.

In principle, it is 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 wing for the material processing covering. This enables a one-piece injection molding of the base body. However, it is preferable to provide an at least partial covering of this rib profile, which is open at the rear. This cover can in turn be an injection molded part, but need not be. It is preferred that the cover extends over the whole Extent of the open rib profile extends and this closes. In this sense, at least one cover of the open first and / or second rib profile, which supplements the base body, is expediently provided on the end face of the rotary disc facing away from the wing. This cover can be chosen so that it complements the base body so that it appears from the outside like a massive three-dimensionally expanded disk-shaped body.

This cover can itself be thin as a film, for example if it only serves to serve as a label or label carrier. This film-like thickness of the rear cover is generally also generally sufficient for the wall thickness of the base body provided with the two rib profiles. Accordingly, the overlap of the first and / or second rib profile on the end face provided with the wing for the material processing covering can be made thin. This wall thickness can, however, also be selected to be of different thickness in different wall areas and / or in comparison of the front with the rear end face. The statically required wall thickness of the radially extending webs of the rib profile and / or of the webs running in the circumferential direction can expediently be selected as a measure of the wall thickness. In the borderline case, these webs and the two end covers can also be designed essentially the same or even completely the same. The covering of the respective rib profile on the end face of the rotary disc facing away from the wing need not be flat, which may be sufficient in the case of a purely label carrier function, but expediently supplements at least one radial section of the first rib profile and / or at least one radial section of the second rib profile with corresponding supplementary profiles. When the base body is combined with its rear cover, this results in increased stability of the base body and its cover by plugging it together or, preferably, in a permanent manner, such as by welding. It can it is sufficient that the addition of the rib profile only makes up a small part of the axial extension of the ribs.

An arrangement is preferred in which the cover complements the entire first rib profile and a radially inner section of the second rib profile between two adjacent annular circumferential ribs, the radially outer section of the second rib profile preferably being additionally covered flat without forming a supplementary profile and thus in the peripheral region the rotary disc allows a certain axial compliance.

The cover provided as a supplement to the base body can also have functions other than the carrying function for a label. A function can be that of a protective cover on the back of the other open base body of the rotating disk.

It is even possible to use the back cover as a carrier for a further material processing covering, which can be the same, similar or different in relation to the material processing covering discussed earlier arranged on the front side of the actual basic body of the rotating disk.

On the wing on the base body and / or in the event that the back cover of the base body also serves as a carrier for a material processing covering, concentrically circumferential grooves can be provided in a known manner, which can accommodate adhesive or another binder for the material processing covering so that the material processing covering on the relevant wing on the base body or its rear cover in operation reliably, ie secured against detachment and against relative rotation, is liable. As mentioned at the beginning, instead of this concentric grooving, continuous or partial recesses, such as depressions, holes or other recesses, can also be provided.

The invention is described below with reference to schematic shear drawings explained in more detail using an exemplary embodiment. Show it:

Figure 1 is a perspective view of a rotary disc for processing material surfaces.

Figure 2 is a front end view of the base body of the rotary disc.

FIG. 3 shows a rear plan view of the base body according to FIG. 2;

Fig. 4 is a perspective view of the base body of FIGS. 1 and 2 obliquely from the front and

5 shows a corresponding perspective view of the same base body obliquely from behind;

FIG. 6 shows a section along the line E-E in FIG. 3 with an enlarged drawing of a detail in FIG. 6a;

7 shows a section along the line F-F in FIG. 3 with an enlarged drawing out of a detail in FIG. 7a;

FIG. 8 shows an axial plan view of a rear cover of the base body from FIGS. 2 to 7a, specifically with respect to its installed state from the inside;

9 obliquely from the inside, a perspective view of the cover according to FIG. 8;

10 shows a section along the line C-C in FIG. 8 with an enlarged detail in FIG. 10; such as

11 shows a diagonal section through the assembly from the base body of FIGS. 2 to 7a with an enlarged drawing of a detail in FIG. 11a.

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. A first ring zone 8 or a second ring zone 10 are formed on the two end faces of the rotary disc 2 at a distance around the central hole 6 up to or beyond the edge, and are provided on associated ring-shaped wings with first or second grinding surfaces. mellen 12 or 14 are occupied. The grinding lamellae each extend radially and overlap in the form of a fan in the circumferential direction, the orientation of the overlap on the first ring zone 8 being reversed as on the second ring zone 10. In this respect, the rotating disk 2 corresponds to the known structure of approximately JP-63-168055-A ,

This is the basic structure of a known rotary disc, which has material processing coverings on its two end faces. The invention is concerned with the special feature described below that the base body 4 of the rotary disc 2 is in any case covered on one end face with material processing covering, in particular with the fan-shaped overlapping grinding lamellae in the sense of forming an end face of the rotary disk of FIG. 1. To the other end face the base body has the open profile to be described in more detail below in accordance with FIGS. 2 to 7a. This open profile can be completed according to FIG. 11 with FIG. 11a on the rear end side by the cover according to FIGS. 8 to 10a. It is not necessary, but it is possible that the final cover is in turn covered with a material processing covering. The cover can also only serve as a profile cover with or without function as a label and / or label carrier. If, in turn, the cover forms a wing for a material processing covering on the outside in a manner that is not shown, in particular for fan-shaped overlapping grinding lamellae, a rotating disk with the basic structure of FIG. 1 is created, in which the rotating disk has fan-shaped overlapping grinding lamellae on its two end faces , which, if desired, can be oriented in opposite directions in the representation of FIG. 1.

If only the base body 4, but not its rear cover, is covered with material processing covering, the second grinding flaps 14 are shown in FIG. 1, which in FIG. 1 are in the second ring zone 10. are ordered to think away. Instead of the fan-shaped overlapping first grinding lamella 12, which in this case are the only grinding lamella 12, any other material processing covering with grinding or polishing characteristics can also take place, in particular also one that is prefabricated in one piece and then via a binding agent, in particular Adhesive with which the base body is connected. However, it is preferred to use grinding disks 12 which overlap in a fan shape in the remaining first ring zone 8 as shown.

The basic body 4 is described in detail below with reference to FIGS. 2 to 7a.

2 and 4, which show the (front) end face of the base body 4, the (first) ring zone 8 can first be seen, which is formed with annular grooves 18 which are concentric and radially equidistant from the central hole 6, and at the same time the the ring zone 8 formed annular wing 20 for the grinding flaps 12 describes. The annular grooves 18 serve for better anchoring of the adhesive or other binding agent with which the grinding flaps 12 are attached to the wing 20. In place of the ring grooves or in addition to this, a further profiling up to perforations, such as perforation or perforation with any perforation cross section, can take place. Such profiling can also serve for better adhesion of the binder to the wing of the grinding flaps 12 or other material processing covering arranged on the outside of the wing 20. If there are no perforations, perforations, etc. are provided, the entire ring zone 8 is formed closed as shown.

Just like the ring zone 8, the end region of the base body 4 lying between this and the central hole 6 is also closed. However, this embodiment of the exemplary embodiment described can, if necessary, vary up to the arrangement of openings are, for example, if additional mounting holes must be provided for a holding device.

From Fig. 6a it can be seen that the annular grooves 8 have a relatively small depth in relation to the wall thickness on the end face of the base body 4 and are approximately pot-shaped with relatively wide, namely approximately corresponding to the outer width of the annular grooves intermediate webs.

From Fig. 6 it can also be seen that the wing 20 at an acute angle α from ... to ..., e.g. 12 ', is inclined with respect to a line perpendicular to the axis of the hub 6, which extends radially at every radius.

Furthermore, it can be seen from the sectional representations of FIGS. 6 and 7 that the supporting surface 18 is arranged offset on the front side in relation to the radial central plane of the base body 4. The cross-section is bent back axially symmetrically from the inner edge of the ring zone 8 or the wing 20 in the direction of the hub 6, the radially inside the ring zone 8 lying in turn ring-shaped zone 22 from the circular inner edge 24 first of all an annular conically striving section 26 and then a flat one Annular disk 28 describes which is parallel to the imaginary connecting plane of the circular inner edge 24 of the radially outer ring zone 8. The annular zone 22 consequently has a construction which is cranked backwards from the front end face of the base body 4.

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

The individual ring ribs 30 require closer examination.

The radially innermost ring rib 30a forms a sleeve-shaped hub of the rotary disk 2 or of the base body 4 with the sleeve-shaped axial widening of the hole 6. The ring rib 30b which follows radially further outwards lies slightly radially further outwards than the circular inner edge 24 of the ring zone 8 and describes approximately the radial inner edge of the wing 20. The two ring ribs 30a and 30b describe a first annular cross-sectional zone 34 of the base body 4, which is arranged radially further inward than the wing 20.

A second annular cross-sectional zone 36 is formed axially behind the ring zone 8 or the supporting surface 20, specifically between the annular rib 30b common to the first annular cross-sectional zone 34 and an annular rib 30d located on the radial outer edge of the base body 4, which at the same time has a cylindrical and with the hub 6 describes the coaxial lateral surface of the base body. The airfoil 20 is provided on the entire surface area of the ring zone 8 located on the end face in the respective axial extension of the two ring ribs 30b and 30d. An intermediate rib 30c nested approximately midway between the ring rib 30b and the outermost ring rib 30d supports the radially central region of the wing 20. The two cross-sectional zones 34 and 36 together describe the entire open profile on the back of the base body 4. The free edge lies here of the radially innermost ring rib 30a forming the hub and the radially outermost ring rib 30d forming the outer jacket of the base body 4 entirely or essentially in the same radial plane as can be seen from the radially extending reference lines shown in the drawing.

The section line DD shown in FIG. 2 can be understood either as section line EE or as section line FF according to FIG. 3. It can be seen from Fig. 3 that the Section line EE runs along a radial rib or two radial ribs 32 aligned with one another, while section line FF runs in the angular space between two adjacent radial ribs 32. It can also be seen that two diagonally opposite radial ribs are generally aligned with one another. This difference in the sectional guides results in the different sectional representations in FIGS. 6 and 7. In FIG. 6, the height of 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 FIGS. 7 and 7a, a local or annular nose 38 projecting inwards on the back of the radially outermost ring rib 30d close to the rear end end can also be seen, which is arranged in each case between the radial ribs 32 and can be used for fastening the rear cover, which will be described below, of the rib profile of the base body 4 which is open to the rear, but does not necessarily have to be used.

On the back, the cover 40 consists of two concentric flat annular disks 42 and 44, each running in a radial plane, which adjoin one another axially with respect to the annular rib 30b via a small step 45 and which form an overall self-contained end face on the rear side of the base body 4 can. The annular disk 42, which also forms the hole 6, is somewhat axially outward according to FIG. 10 and the annular disk 42 is axially offset inward. The outer end face 42, 44 on the back of the base body only serves as a support for labels and / or other printing. As already mentioned earlier, the rear end outer surface of the cover 40 in the area of the annular disk 42 can also form an annular support surface for rear-mounted grinding lamellae 14 of the rotary disk, which then form on the second one formed by the radially outer annular disk 44 Ring zone 10 in the same can be attached in a manner as described earlier with respect to the first grinding flaps 12 with reference to the wing 20 with the annular grooves 18 or another surface design which improves the adhesion.

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

The following are special features:

The annular space between the rudimentary annular ribs 46c and 46d, which can connect to the annular ribs 30c and 30d of the base body 4 in a complementary manner, is kept free of radial ribs, so that the annular disk 44 is flat in the manner of a lamella. The rib 30b common to the two cross-sectional zones 34 and 36 of the base body 4 is not a rudimentary ring rib on the cover 40, but only opposite the step 45. Finally, the ring rib 30, which essentially forms the hub, on the base body 4 is opposite the rudimentary ring rib 46a on the cover 40, which likewise contributes somewhat to the hub formation. Rudimentary radial ribs, which are completely diagonally aligned with one another, are present with a corresponding angular distribution like the radial ribs 32 on the base body 4 on the inside of the two annular sections 26 and 28, interrupted by the step 45.

The representations in the main figures 2 to 11 are true to scale with respect to a possible practical embodiment, the preliminary drawing of details with a five-fold magnification in FIGS. 6a, 7a, 10a and 11a. It can be seen, inter alia, that the outer wall thicknesses of the base body 4 and its rear cover 40 are lamellar thin and the wall thickness is comparable to the web-like thickness of the ring ribs 30, radial ribs 32 and rudimentary ring ribs 46 and rudimentary radial ribs 48. You can even choose the wall thicknesses completely the same or in any case essentially the same and thus get by with the construction of a stable, even for high-speed loads, rotating disk 2 with very little material in the body 4 that can be used together with the rotating disk 2, optionally including a rear cover 40.

Claims

Usable rotary disc for processing material surfaces with a base body made of injection-molded material, in particular plastic claims

1. Usable rotary disc (2) for processing material surfaces, in which a material processing covering subject to abrasion consisting of at least one element (12) with geometrically indefinite cutting edges on a wing on an end face of a disc-shaped base body (4) used up with the rotary disc via a binder, In particular, an adhesive is attached, the base body (4) being made of injection-molded material, in particular plastic, and having a central hub (6) for the direct or indirect reception of a drive shaft of the rotary disc, the supporting surface on an annular zone (8) all around the hub (6) is provided, and a first annular cross-sectional zone (34) of the base body (4), which is arranged radially further inward than the supporting surface (20), with the first rib profile (30a, 30b, 32) intersecting ribs and an open configuration is formed between the ribs, and in particular the first annular cross-sectional zone (34) and the ring zone (8) in which the supporting surface (20) is arranged radially adjoin one another, in particular the first rib profile (30, 32) on the end face of the rotary disc (2), which forms the supporting surface (20), is designed to be closed, in particular the first rib profile (30, 32) has radially distributed ribs (32) which are distributed over its circumference and which are concentric by at least two annular ribs (30a, 3b) are stiffened against each other, in particular the material processing covering is formed by processing lamellae, in particular grinding lamellae (12), which are each arranged with radial extension and fan-shaped overlap in the circumferential direction on the wing (20), in particular the wing ( 20) is axially offset from the center plane of the hub (6), and in particular, the wing (20) is arranged at a helix angle (α) with respect to the center plane of the hub (6), characterized in that a second annular cross-sectional zone (36) of the base body (4) is located on the rear of the wing (20) is arranged as a second rib profile (30b, 30c, 30d, 32) with intersecting ribs and an open configuration between the ribs.

2. Rotating disc according to claim 1, characterized in that the hub (6) in the first rib profile (30a, 30b, 32) is included.

3. Rotating disc according to claim 1 or 2, characterized in that the first rib profile (30a, 30b, 32) is shaped in the radial direction in accordance with a cranked configuration 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 rib profile (34, 36) are rectilinear, curved or mixed rectilinear and curved.

5. Rotating disc according to one of claims 1 to 4, characterized in that the ribs (30, 32) of the first and / or second rib profile (34, 36) cross directly, offset or mixed directly and offset.

6. Rotating disc according to one of claims 1 to 5, characterized in that the second rib profile (30b, 30c, 30d, 32) over the circumference of the second cross-sectional zone (36) has distributed and radially extending ribs (32), which by at least two ribs (30b, 30c, 30d) which run in a concentric ring are stiffened against one another.

7. Rotating disc according to one of claims 1 to 6, characterized in that the first and the second rib profile (30, 32) merge into one another as a uniform rib profile.

8. Rotating disc according to claims 6 and 7, characterized in that, preferably all, radially extending ribs (32) of the first and the second rib profile continue into each other.

9. Rotating disc according to one of claims 6 to 8, characterized in that an annular rib (30b) is common to the first and the second rib profile.

10. Rotating disc according to claim 9, characterized in that the first rib profile has only one further radially inner ring-shaped rib (30a), 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 rib profile has only two further radially further annular ribs (30c, 30d), preferably the one rib (30c) the wing (20) in a radially central region supported and the other two ribs (30b, 30d) follow the radially inner and the radially outer boundary of the wing (20).

12. Rotating disc according to one of claims 1 to 11, characterized in that the plurality, preferably all, of the ribs (30, 32) of the first and / or the second rib profile are shaped as narrow webs.

13. Rotating disc according to one of claims 1 to 12, characterized in that the radially extending and / or the circumferential ribs (30, 32) are interrupted like a truss.

14. Rotating disc according to one of claims 1 to 13, characterized by at least one cover (40) complementary cover (40) of the open first and / or second rib profile on the end face of the rotating disc (2) facing away from the wing (20).

15. A rotary disc according to claim 14, characterized in that the cover (40) supplements at least one radial section of the first rib profile and / or at least one radial section of the second rib profile.

16. Rotating disc according to claim 15, characterized in that the cover (40) complements the entire first rib profile and a radially inner portion of the second rib profile between two adjacent annular circumferential ribs (30b, 30c) and preferably the radially outer portion of the second rib profile flat covered.

17. Rotating disc according to claim 15 or 16, characterized in that the addition makes up only a small part 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 itself as a load-bearing component of the base body (4) with a second wing arranged on its other end face of a second material processing covering subject to wear from at least one element (14) with a geometric shape indefinite cutting is provided, with processing lamellae, in particular grinding lamellae (14), which are each arranged with a radial extension and a fan-shaped overlap in the circumferential direction on the second wing, preferably being provided as the second processing covering.

19. Rotating disc according to one of claims 1 to 18, characterized in that the wing (20) on one end face of the base body (4) and / or a further wing according to claim 18 on the other end face of the base body facing the respective material processing surface Outside surface is provided with a radially extending holding profile for the material covering, preferably as a result of alternating alternating circumferential grooves (18) and intermediate webs.

20. Rotary disc according to one of claims 1 to 19, characterized in that the entire open rib profile (30, 32) consisting of the first rib profile and the second rib profile over the entire radius of the base body (4) between the outer edge of the wing (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 covering of the first and / or the second rib profile on an end face of the base body (4) or the cover (20) provided with a supporting surface (20). 40) is film-like thin.

22. A rotary disc according to claim 21, characterized in that the cover (40) and the ribs (30, 32) of the first and / or the second rib profile have approximately the same wall thickness.