TOOL FOR WORKING ABRASIVE MATERIALS

Abstract

A tool for processing abrasive materials, in particular rocks, sand or ores, may include a main tool body and a hard metal plate positioned on the main tool body. A build-up weld may be applied to a surface of the hard metal plate and to the main tool body to bond the hard metal plate to the main tool body. Further, a method for producing or treating such a tool may involve positioning the hard metal plate on the main tool body and applying a build-up weld to the hard metal plate and the main tool body such that the hard metal plate is attached to the main tool body.

Claims

1.-19. (canceled)

20. A tool for processing abrasive materials, the tool comprising: a main tool body; a metal plate disposed on the main tool body; and a build-up weld that attaches the metal plate to the main tool body, the build-up weld being applied to a surface of the metal plate and to the main tool body.

21. The tool of claim 20 wherein the metal plate is disposed on the main tool body so as to extend in a direction in which a force is configured to act on the tool.

22. The tool of claim 20 wherein the metal plate is disposed in a groove formed in a surface of the main tool body.

23. The tool of claim 20 wherein the metal plate is a first metal plate and the build-up weld is a first build-up weld, the tool comprising a second metal plate bonded to the main tool body by way of a second build-up weld.

24. The tool of claim 23 wherein the first and second metal plates are disposed parallel to one another.

25. The tool of claim 23 wherein the first metal plate is adjacent to the second metal plate and is bonded to the second metal plate by way of one of the build-up welds.

26. The tool of claim 20 wherein the metal plate is a first metal plate, wherein the tool comprises a second metal plate, wherein the main tool body comprises a first groove and a second groove, wherein the first metal plate is disposed in the first groove and the second metal plate is disposed in the second groove.

27. The tool of claim 20 wherein the main tool body comprises an indentation in which the metal plate is disposed.

28. The tool of claim 27 wherein the metal plate fills a cross section of the indentation in the main tool body.

29. The tool of claim 20 wherein a thickness of the build-up weld is greater than a thickness of the metal plate.

30. The tool of claim 20 wherein the metal plate comprises 90-94% tungsten carbide and 6-10% cobalt.

31. A processing apparatus for processing abrasive materials, the processing apparatus comprising a tool that includes a main tool body; a metal plate disposed on the main tool body; and a build-up weld that attaches the metal plate to the main tool body, the build-up weld being applied to a surface of the metal plate and to the main tool body.

32. A method for producing or treating a tool for processing abrasive materials, wherein the tool comprises a main tool body, the method comprising: positioning a first metal plate on the main tool body; and applying a first build-up weld to the first metal plate and the main tool body to attach the first metal plate to the main tool body.

33. The method of claim 32 comprising positioning a second metal plate on the main tool body such that the second metal plate is parallel to the first metal plate.

34. The method of claim 33 comprising bonding the second metal plate to the main tool body and to first metal plate, which is adjacent to the second metal plate, by way of a second build-up weld.

35. The method of claim 32 comprising machining a surface of the main tool body before the metal plate is positioned on the main tool body.

36. The method of claim 32 comprising positioning the first metal plate on the main tool body such that the metal plate extends in a direction in which a force is configured to act on the tool.

37. The method of claim 32 comprising introducing a groove into a surface of the main tool body before positioning the first metal plate on the main tool body, wherein the first metal plate is positioned in the groove.

38. The method of claim 32 comprising introducing first and second grooves that are parallel into a surface of the main tool body before positioning the first metal plate on the main tool body, wherein the first metal plate is positioned in the first groove and a second metal plate is positioned in the second groove.

39. The method of claim 32 wherein the main tool body comprises an indentation, wherein the first metal plate is positioned in the indentation.

Description

DESCRIPTION OF THE DRAWINGS

[0034] The invention is explained in greater detail below with the aid of a number of exemplary embodiments and with reference to the appended figures.

[0035] FIG. 1 is a schematic representation of a tool in side view with a hard metal plate according to one exemplary embodiment.

[0036] FIG. 2 is a schematic representation of a tool in front view with a plurality of hard metal plates according to the exemplary embodiment of FIG. 1.

[0037] FIG. 3 is a schematic representation of a tool in front view with a plurality of hard metal plates according to one further exemplary embodiment.

[0038] FIG. 4 is a schematic representation of a crushing apparatus in side view with a tool according to one further exemplary embodiment.

[0039] FIG. 1 shows a tool 10 of an apparatus, not shown, for processing abrasive materials, such as for example rock, sand or ore. The schematically depicted tool 10 in particular comprises a crushing tooth for mounting on a crushing roll or an excavator bucket. By way of example, the tool comprises a main body 18, which in cross section has substantially the shape of a parallelogram, wherein the side faces of the tool 10 are inclined in the processing direction, in particular in the crushing direction of a crushing tool. The processing direction is in particular the direction in which the tool 10 moves during operation of the crushing apparatus for processing the material. The side face of the tool 10 shown on the left in FIG. 1 points in the processing direction during operation of the processing apparatus. The tool 10 is for example mounted on a roll of a roll crusher, wherein, during operation of the tool 10, the side face inclined substantially in the manner of a tooth and shown on the left in FIG. 1 and the upper face of the tool 10 are exposed to the greatest wear. The tool 10 may additionally comprise further tools in particular with a locally delimitable wear surface, such as a crushing tooth of any tooth shape or a hammer head of a hammer crusher.

[0040] The tool 10 comprises a main tool body 18 with an indentation 14, which for example comprises a region on the surface of the tool main tool body 18 which has suffered wear during operation of the processing apparatus. The indentation 14 extends for example from the side face pointing in the processing direction to the upper face of the tool 10.

[0041] A hard metal plate 12 is arranged in the indentation 14. The hard metal plate 12 substantially exhibits the shape of the cross section of the indentation 14 and is arranged in such a way in the indentation 14 that it fills the cross section of the indentation. In the case of a worn tool 10, the hard metal plate 12 arranged in the indentation 14 re-establishes the original cross section of the tool from the prior formation of the wear-related indentation 14 in the surface. The hard metal plate 12 is bonded to the main body 18 of the tool 10 by way of a build-up weld 16.

[0042] FIG. 2 shows a cross section of a front view of a tool 10 which corresponds to the tool of FIG. 1. The indentation 14 extends for example over the entire width of the side face pointing in the processing direction. A plurality of hard metal plates 12 are arranged in parallel and spaced uniformly relatively to one another in the indentation 14. The hard metal plates all exhibit substantially the same shape and are arranged in such a way in the indentation 14 that they extend substantially in the processing direction. Build-up welds 16 are arranged in each case between adjacent hard metal plates 12, bonding adjacent hard metal plates 12 to one another and the hard metal plates 12 to the main tool body 18 of the tool 10. The build-up welds 16 between the hard metal plates 12 extend over the entire height of the hard metal plates 12. The hard metal plates 12 and the build-up welds 16 are arranged in such a way in the indentation 14 of the main tool body 18 that, in the case of a worn main tool body 18, the original shape of the main tool body 18 from prior to formation of the wear-related indentation 14 is re-established.

[0043] The hard metal in particular comprises sintered metal carbides, with preferably 90-94% tungsten carbide embedded in 6-10% cobalt, in particular a cobalt matrix. The build-up welds for example comprise a filler material of hard metal, in particular tungsten carbides or titanium carbides. The build-up welds are preferably bonded to the hard metal of the hard metal plates by way of a metallurgical bond. For example, the build-up weld is applied to the hard metal plates and the main tool body 18 of the tool 10 by laser welding. In particular, the build-up weld is applied in such a way to the hard metal plate that only slight mixing is caused between the hard metal and the build-up weld.

[0044] The spacing of the hard metal plates 12 is configured in such a way that it is possible to apply a build-up weld 16 between two adjacent hard metal plates 12, for example by means of laser welding.

[0045] FIG. 3 shows a tool 10 corresponding substantially to the tool 10 of FIG. 2, wherein, in contrast to the tool of FIG. 2, a plurality of grooves 20 are applied in the indentation 14.

[0046] The grooves 20 extend substantially parallel to one another and exhibit a width which corresponds to the width of the hard metal plates. The grooves 20 form a holder for the hard metal plates 12 and extend in particular over the entire length of the indentation. One hard metal plate 12 is in each case arranged in each groove 20. In the exemplary embodiment shown in FIG. 3, the build-up weld 16 is applied only between adjacent hard metal plates 12 and the surface of the indentation 14. No build-up weld 16 is applied within the grooves 20.

[0047] The grooves 20 allow precise positioning of the hard metal plates 12 in the indentation 14 of the tool 10, wherein application of the build-up weld 16 to the hard metal plates 12 and the surface of the indentation 14 is further simplified.

[0048] FIG. 4 shows a processing apparatus 22, in particular a crushing apparatus with a roll crusher and a tool 10 with a hard metal plate 12 arranged in an indentation 14, in particular a worn region, as described with reference to FIG. 1, 2 or 3. The crushing apparatus 22 comprises two crushing rolls 24, which rotate in opposite directions to one another, in the directions shown by the arrows, wherein the direction of rotation of the crushing rolls 24 is the crushing direction. A plurality of tools 10 are arranged spaced uniformly from one another on the outer circumference of the crushing rolls 24. Between the crushing rolls 24 a crushing gap 26 is formed, into which the material to be crushed is fed. The tools 10 are arranged on the outer circumference of the crushing rolls 24 in such a way that the indentations 14, in particular the worn region, point in the direction of rotation of the crushing rolls 24.

LIST OF REFERENCE SIGNS

[0049] 10 Tool [0050] 12 Hard metal plate [0051] 14 Indentation [0052] 16 Build-up weld [0053] 18 Main tool body [0054] 20 Groove [0055] 22 Processing apparatus [0056] 24 Crushing rolls [0057] 26 Crushing gap