SEPARATING BLADE FOR PROCESSING A HARD MATERIAL, AND TOOL

Abstract

The proposal is for a separating blade for the material-removing machining of a mineral-containing hard material, wherein the separating blade is designed to be set in rotation by means of a drivable flange arrangement, and wherein a liquid coolant can be supplied to the separating blade for a machining mode. According to the invention, in an inner volume of the separating blade that is surrounded by parts of the separating blade, an inner structure for providing a flow path, through which the coolant can flow, between an inlet point and an outlet point is formed in such a way that, in the connected state with the flange arrangement, an outflow of portions of the supplied coolant from the inner volume is prevented along the flow path during the machining mode of the separating blade, thus ensuring that no coolant reaches the machining section on the outside of the separating blade.

Claims

1. A separating blade for the material-removing machining of a mineral-containing hard material, comprising a machining section positioned radially on the outside with respect to a central separating blade axis, for material removal of the hard material, wherein the separating blade is designed to be set in rotation by a drivable flange arrangement, and wherein a liquid coolant can be supplied to the separating blade during machining, wherein, in an inner volume of the separating blade that is surrounded by parts of the separating blade, an inner structure is formed for providing a flow path, through which the coolant can flow, between an inlet point of the separating blade for supplying the coolant and an outlet point of the separating blade for the discharge of the coolant, wherein in the connected state with the flange arrangement, an outflow of portions of the supplied coolant from the inner volume is prevented along the flow path during machining using the separating blade to ensure that no coolant reaches the machining section on the outside of the separating blade.

2. The separating blade according to claim 1, wherein, in an inner volume of the separating blade that is surrounded by parts of the separating blade, an inner structure is formed for providing a flow path, through which the coolant can flow, between an inlet point of the separating blade for supplying the coolant and an outlet point of the separating blade for the discharge of the coolant, wherein the inlet point and the outlet point are in a hub region of the separating blade and wherein the inner structure defines a flow path for the coolant that can be supplied, according to which, during machining, the coolant flows radially with respect to the separating blade axis from the inside outwards from the inlet point and wherein the coolant flows radially with respect to the separating blade axis from the outside inwards to the outlet point.

3. The separating blade according to claim 1, wherein the inlet point is positioned on a first side of the separating blade, and the outlet point is situated on a second side of the separating blade, wherein the first side and the second side lie opposite one another in the axial direction with respect to the separating blade axis.

4. The separating blade according to claim 1, wherein the inlet point and the outlet point are connected to one another via the flow path for the coolant.

5. The separating blade according claim 1, further comprising guide sections formed in the inner volume for defining a flow direction of the coolant through the separating blade.

6. The separating blade according to claim 1, further comprising a seal for the fluidtight separation of the inner volume from the outside in a radially outer region of the separating blade.

7. The separating blade according to claim 5, wherein the guide sections delimit the flow path, wherein the flow path has a section with an axial extent with respect to the separating blade axis.

8. The separating blade according to claim 1, wherein the separating blade has a main blade and two outer blades, wherein the main blade is positioned between the two outer blades in the axial direction of the separating blade.

9. The separating blade according to claim 1, wherein the separating blade has a plurality of main blades and in each case one intermediate blade is positioned between two adjacent main blades.

10. The separating blade according to claim 1, wherein the separating blade has a plurality of main blades without an intermediate blade between two adjacent main blades.

11. The separating blade according to claim 1, further comprising a seal in a radially outer region of the separating blade and in an axial intermediate region between a main blade and an axially adjacent blade of the separating blade.

12. The separating blade according to claim 1, wherein the separating blade has a separating blade diameter of over 300 millimeters.

13. The separating blade according to claim 1, further comprising a spacer element between two adjacent blades of the separating blade.

14. A tool having a flange arrangement for a separating blade according to claim 1.

15. The tool according to claim 14, further comprising a liquid cooling device.

16. A separating blade for the material-removing machining of a mineral-containing hard material, comprising a machining section positioned radially on the outside with respect to a central separating blade axis, for material removal of the hard material, wherein the separating blade is designed to be set in rotation by a drivable flange arrangement, and wherein a liquid coolant can be supplied to the separating blade during machining, wherein, in an inner volume of the separating blade that is surrounded by parts of the separating blade, an inner structure is formed for providing a flow path, through which the coolant can flow, between an inlet point of the separating blade for supplying the coolant and an outlet point of the separating blade for the discharge of the coolant, wherein the inlet point and the outlet point are in a hub region of the separating blade and wherein the inner structure defines a flow path for the coolant that can be supplied, according to which, during machining, the coolant flows radially with respect to the separating blade axis from the inside outwards from the inlet point and wherein the coolant flows radially with respect to the separating blade axis from the outside inwards to the outlet point.

17. The separating blade according to claim 16, further comprising a seal for the fluidtight separation of the inner volume from the outside in a radially outer region of the separating blade.

18. The separating blade according to claim 16, wherein the separating blade has a main blade and two outer blades, wherein the main blade is positioned between the two outer blades in the axial direction of the separating blade.

19. The separating blade according to claim 16, wherein the separating blade has a plurality of main blades and in each case one intermediate blade is positioned between two adjacent main blades.

20. The separating blade according to claim 16, wherein the separating blade has a plurality of main blades without an intermediate blade between two adjacent main blades.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Further features and advantages of the present invention are explained in greater detail by means of different illustrative embodiments according to the present invention.

[0056] FIG. 1 shows a sectioned part of a schematically illustrated tool having a separating blade according to the present invention, which is connected to a flange arrangement of the tool;

[0057] FIG. 2 shows the separating blade according to the present invention as per FIG. 1 in a plan view;

[0058] FIG. 3 shows a section through the separating blade according to line A-A in FIG. 2;

[0059] FIG. 4 shows a section through the separating blade according to line B-B in FIG. 3;

[0060] FIG. 5 shows another separating blade according to the present invention in plan view;

[0061] FIG. 6 shows a section through the separating blade according to line C-C in FIG. 5;

[0062] FIG. 7 shows a section through the separating blade according to line D-D in FIG. 6;

[0063] FIG. 8 shows another separating blade according to the present invention in plan view;

[0064] FIG. 9 shows a section through the separating blade according to line E-E in FIG. 8; and

[0065] FIG. 10 shows a section through the separating blade according to line F-F in FIG. 9.

DETAILED DESCRIPTION OF THE INVENTION

[0066] In some cases, the same reference signs are used below for corresponding elements of different illustrative embodiments of the present invention.

[0067] FIG. 1 shows, in highly schematized form, a flange arrangement 24 having a separating blade 1 according to the present invention in section along a diameter of the separating blade 1. The separating blade 1 is designed as an internally cooled single tool or as an internally cooled single sawblade, which is used for the material-removing machining or cutting of a hard ground material M, such as a concrete, asphalt or stone material, a section of which is indicated in dashed lines in FIG. 1.

[0068] The separating blade 1 can be driven in rotation about its separating blade axis S, which is illustrated in extended form. The following indications radial and axial relate to the separating blade axis S.

[0069] Radially on the outside or on an outer rim, the separating blade 1 furthermore has a machining section 2, which is illustrated as circumferentially continuous and, in this case, comprises a diamond tool 2a with the axial width B, for example. By means of the rotating separating blade 1, a joint or a groove N with the width B corresponding to the width B of the machining section 2 can be introduced into the ground material M.

[0070] The separating blade 1, which is a three-ply blade in the embodiment illustrated, has precisely one main blade 3 and two outer blades, which are designed as cover plates 4 and 5, wherein the main blade 3 is situated centrally between the two outer blades in the axial direction or with an equal axial spacing with respect to each of the two cover plates 4, 5 (see FIG. 3).

[0071] The main blade 3 and the two cover plates 4, 5 are connected to one another and are held at an axial spacing between the main blade 3 and the cover plates 4 and 5 by means of six spacing washers 9 to 14 between the main blade 3 and cover plate 4 and by means of six spacing washers 9 to 14 between the main blade 3 and cover plate 5. The respective intermediate regions of the respective axial spacing forms an inner volume 8 of the separating blade 1, wherein the axial spacing can be specified by means of the thickness of the spacing washers 9 to 14. By means of the spacing washers 9-14, the main blade 3 and the two cover plates 4, 5 can be firmly connected to one another, e.g. by material bonding.

[0072] In a region of the separating blade 1 or of the blades 3, 4 and 5 which is close to the axis or central, there is in each case an axial through hole 15 through the separating blade 1 in alignment with a respective central opening in each spacing washer 9 to 14. By means of screwed joints 28 through the six through holes 15 distributed circumferentially on a radius, the separating blade 1 can be firmly connected to flange parts 26 and 27 of the flange arrangement 24, which engage on both sides of the separating blade 1. A rotary union 25 that is stationary with respect to the flange part 26 adjoins the flange part 26.

[0073] Screw-fastening means (not shown) of the screwed joints 28 pass through the through holes 15 and corresponding openings in the flange arrangement 24, wherein the screwed-joint axes SV are indicated in FIGS. 2 and 3.

[0074] The flange parts 26 and 27 make fluidtight contact with the outer surfaces of the cover plates 4 and 5, e.g. with the aid of seals 26a and 27a.

[0075] The hollow inner volume 8 formed in the interior of the separating blade 1, through which a liquid coolant such as water can flow, comprises a disk-shaped first partial volume 8a between cover plate 4 and the main blade 3 and a disk-shaped second partial volume 8b between cover plate 5 and the main blade 3. During the operation of the separating blade 1, the coolant is supplied to the flange part 27 and hence to an inlet point 29 on the separating blade 1, in particular continuously in supply direction P1, and, after flowing through the inner volume 8 in the outlet direction P2, is discharged at the rotary union 25 and hence at an outlet point 30 on the separating blade 1, in particular continuously (see FIG. 1). The flow path D theoretically traveled by the coolant during this process, which is provided with flow direction arrows, is illustrated in principle in FIG. 1. The flow of the coolant through the arrangement is accomplished, for example, by means of a pumping device, such as a centrifugal pump or the like.

[0076] For the support and rotary driving of the separating blade 1, the separating blade 1 has an opening 31, which is concentric with the separating blade axis S and through which a shaft section 32 of the flange arrangement 24 passes. Three axially extending, circumferentially offset recessed notches are formed on the outside of the shaft section 32, the basic shape of which is cylindrical. On the main blade 3 there is a central hole 3a matching the shaft section 32 with a shape complementary to the external shape of the shaft section 32, wherein three projections 33 that fit precisely into the notches of the shaft section 32 extend on a rim of the hole 3a, making leaktight contact. The main blade 3 thus makes fluidtight contact with the shaft section 32 over the entire circumference of the shaft section 32.

[0077] Since the two cover plates 4 and 5 each have a central circular round hole 4a and 5a, which therefore have no projections, the coolant supplied axially on the outside of the shaft section 32 at cover plate 5 can pass via the notches in the shaft section 32 into the inner volume 8 or into the partial volume 8b between cover plate 5 and the main blade 3 in the region of the round hole 5a or in the three-channel inlet point 29. Since the notches in the shaft section 32 are leaktightly closed by the projections in the main blade 3 in the inner volume 8, the shaft section 32 is sealed off with respect to the main blade 3 over its entire circumference at the associated axial point or at the outer circumference. While the separating blade 1 is rotating, the coolant is therefore guided radially outwards with the assistance of centrifugal force in partial volume 8b, at least as far as the region of the passage openings 16 to 23 in the main blade 3. The coolant then enters partial volume 8a in the axial direction through the passage openings 16 to 23 and flows back radially inwards as far as the shaft section 32. There, the notches in the shaft section 32 each form a passage or outlet in the region of the round hole 4a or the three-channel outlet point 30, thus enabling the coolant to be discharged through the flange part 26.

[0078] For the fluid-tight sealing of the inner volume 8 or of the two partial volumes 8a, 8b along the flow path D, wherein no coolant or not even a relatively small quantity of coolant, escapes outwards from the separating blade 1, there are annular or circumferentially closed seals, composed, for example, of a flexible material, radially on the outer rim of cover plate 4 and cover plate 5, in each case axially on the inside.

[0079] More specifically, there is a first seal 6 between cover plate 4 and the main blade 3 and a second seal 7 between cover plate 5 and the main blade 3. The radially inner circumferential rim of the seals 6 and 7 is in each case admittedly close to the radially outer rim of the passage openings 16 to 23, but is spaced apart therefrom at least by a safe distance.

[0080] The possibility of the radially outer rim of the cover plates 4, 5 extending as far as the machining section 2 or diamond tool 2a is not excluded. In that case, the seals 6 and 7 are preferably radially further out as far as the diamond tool 2a.

[0081] According to a second illustrative embodiment shown in FIGS. 5 to 7, an internally cooled separating blade 34 according to the present invention has two axially outer main blades 35 and 36 and an intermediate blade 37 situated axially therebetween. The separating blade 34 is configured as a double tool or as a double sawblade.

[0082] The basic structure comprising three axially spaced blades with a hollow, leaktightly closed inner volume of separating blade 34 coincides in other respects with the basic structure of separating blade 1. Especially as regards the presence of the passage openings 16-23, the through holes 15 with the spacing washers 9-14 and the seals 6 and 7.

[0083] In other words, as compared with separating blade 1, the cover plates 4, 5 on separating blade 34 are each provided with a machining section but the main blade 3 is without a machining section.

[0084] The main blades 35 and 36 each have a machining section 38 and 39, respectively, wherein the intermediate blade 37 does not have a machining section and has a diameter which is smaller than that of the two main blades 35, 36 by the radial dimension of the machining sections 38, 39.

[0085] In the third illustrative embodiment of the invention shown in FIGS. 8 to 10, which shows an internally cooled triple tool or triple sawblade, the separating blade 40 according to the invention has three main blades 41, 42 and 43. The basic structure of separating blade 40 likewise corresponds to the basic structure of separating blade 1. Especially as regards the presence of the passage openings 16-23, the through holes 15 with the spacing washers 9-14 and the seals 6 and 7.

[0086] Taking separating blade 1 as a basis, all three blades in this case are provided with the same diameter and with a machining section 44, 45 and 46, respectively.

[0087] Otherwise, the two outer main blades 41 and 43 are constructed in the same way as the cover plates 4 and 5 of separating blade 1.

List of Reference Signs:

[0088] 1 separating blade [0089] 2 machining section [0090] 2a diamond tool [0091] 3 main blade [0092] 3a hole [0093] 4 cover plate [0094] 4a round hole [0095] 5 cover plate [0096] 5a round hole [0097] 6 seal [0098] 7 seal [0099] 8 inner volume [0100] 8a, 8b partial volume [0101] 9-14 spacing washer [0102] 15 through hole [0103] 16-23 passage opening [0104] 24 flange arrangement [0105] 25 rotary union [0106] 26, 27 flange part [0107] 26a, 27a seal [0108] 28 screwed joint [0109] 29 inlet point [0110] 30 outlet point [0111] 31 opening [0112] 32 shaft section [0113] 33 projection [0114] 34 separating blade [0115] 35, 36 main blade [0116] 37 intermediate blade [0117] 38, 39 machining section [0118] 40 separating blade [0119] 41-43 main blade [0120] 44-46 machining section