CA3066937A1 - Crushing tool and method for producing a crushing tool - Google Patents
Crushing tool and method for producing a crushing toolInfo
- Publication number
- CA3066937A1 CA3066937A1 CA3066937A CA3066937A CA3066937A1 CA 3066937 A1 CA3066937 A1 CA 3066937A1 CA 3066937 A CA3066937 A CA 3066937A CA 3066937 A CA3066937 A CA 3066937A CA 3066937 A1 CA3066937 A1 CA 3066937A1
- Authority
- CA
- Canada
- Prior art keywords
- wear
- main body
- crushing tool
- crushing
- protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
- B02C4/305—Wear resistant rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/28—Details
- B02C4/30—Shape or construction of rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2210/00—Codes relating to different types of disintegrating devices
- B02C2210/02—Features for generally used wear parts on beaters, knives, rollers, anvils, linings and the like
Abstract
The present invention relates to a crushing tool for attachment to a crusher roller of a roll crusher, cornprising a main body and at least one wear-protection element fastened to the main body, wherein the wear-protection element is formed from a hard metal, wherein the main body is formed from a metal matrix composite material which has a wear-protection insert of a hard metal. A method for producing a crushing tool for attachment to a crusher roller of a roll crusher comprising positioning a wear-protection insert of a hard metal in a casting mold for casting a main body of the crushing tool; casting the main body, so that the wear-protection insert is enclosed at least partially by the casting material of the main body and fitting a wear-protection element of a hard metal on the cast main body.
Description
, CA 03066937 2019-12-11 Crushing tool and method for producing a crushing tool The invention relates to a crushing tool for attachment to a crushing roll of a roll crusher, and to a roll crusher having such a crushing tool. The invention also relates to a method for producing such a crushing tool.
For comminuting materials such as limestone, oil shale, marl, clay, oil sand or similar mineral materials, crushers, in particular roll crushers, are usually used. Known roll crushers have two crushing rolls, which rotate oppositely to one another and form a crushing gap between the crushing rolls. The crushing rolls have crushing tools, such as impact bars, hammers, chisels or crushing teeth, which are uniformly spaced apart from one another. The crushing tools of a roll crusher are exposed to a high degree of wear and must therefore be exchanged regularly. DE
4123967 Al discloses such a crushing tool, for example.
In order to counteract the wear of the crushing tools, it is known to solder or weld a wear layer of a relatively hard material onto the crushing tool, which is formed for example from relatively soft steel. However, such a wear layer has only proven to provide sufficient wear protection to a limited extent and, in particular in the case of very abrasive material, does not offer permanent wear protection. WO 2015165934 Al discloses the application of wear protection to a crushing tool by means of hot isostatic pressing (HIP). This method is particularly cost-intensive and very complex to perform.
Against this background, an object of the present invention is to provide a crushing tool which has low wear and can be produced easily and cost-effectively.
This object is achieved according to the invention by a device with the features of independent device claim 1 and with the features of independent method claim 13.
Advantageous developments are evident from the dependent claims.
.. According to a first aspect, a crushing tool for attachment to a crushing roll of a roll crusher comprises a main body, which can be attached to the crushing roll, and at least one wear-,
For comminuting materials such as limestone, oil shale, marl, clay, oil sand or similar mineral materials, crushers, in particular roll crushers, are usually used. Known roll crushers have two crushing rolls, which rotate oppositely to one another and form a crushing gap between the crushing rolls. The crushing rolls have crushing tools, such as impact bars, hammers, chisels or crushing teeth, which are uniformly spaced apart from one another. The crushing tools of a roll crusher are exposed to a high degree of wear and must therefore be exchanged regularly. DE
4123967 Al discloses such a crushing tool, for example.
In order to counteract the wear of the crushing tools, it is known to solder or weld a wear layer of a relatively hard material onto the crushing tool, which is formed for example from relatively soft steel. However, such a wear layer has only proven to provide sufficient wear protection to a limited extent and, in particular in the case of very abrasive material, does not offer permanent wear protection. WO 2015165934 Al discloses the application of wear protection to a crushing tool by means of hot isostatic pressing (HIP). This method is particularly cost-intensive and very complex to perform.
Against this background, an object of the present invention is to provide a crushing tool which has low wear and can be produced easily and cost-effectively.
This object is achieved according to the invention by a device with the features of independent device claim 1 and with the features of independent method claim 13.
Advantageous developments are evident from the dependent claims.
.. According to a first aspect, a crushing tool for attachment to a crushing roll of a roll crusher comprises a main body, which can be attached to the crushing roll, and at least one wear-,
2 protection element fastened to the main body, wherein the wear-protection element is formed from a hard metal. The main body is formed from a metal-matrix composite material which comprises a wear-protection insert of a hard metal. For example, the main body comprises a connecting surface, which can be connected to the surface of the crushing roll, for example in a material-bonding or form-fitting maner. The connecting surface of the main body is preferably formed in a complementary manner to a connecting surface of the crushing roll.
The crushing tool is in particular a crushing tooth, which is preferably attached to a secondary crusher or tertiary crusher. The crushing tooth has a substantially chisel-shaped, in particular tooth-shaped, contour with a tip pointing in the direction of rotation of the crushing roll.
The metal-matrix composite material of the main body comprises a metal-matrix material and the wear-protection insert of a hard metal. The metal-matrix material is, for example, high-temperature-resistant steel and/or a ductile steel with a Brinell hardness of approximately 90-500 HB, in particular 120 ¨ 350 HB, preferably 150 HB, and for example an elongation at break of greater than or equal to 18-26%, in particular 14%.
A main body of a metal-matrix composite material can be produced particularly easily and cost-effectively. The wear-protection insert of a hard metal offers reliable wear protection that can be easily introduced on the surface of the crushing tool. The wear-protection insert is preferably produced from a powdered and/or granular mixture of particles (grains) comprising ceramic, aluminum and/or carbide such as boron carbide, tungsten carbide, silicon carbide, wherein the mixture, is mixed, for example with a binder, heated, in particular gassed, and baked. In particular, the mixture is heated in a for example flexible mold that corresponds to the negative form of the wear-protection insert. The mixture then cools and hardens to give a very wear-resistant body with a porous structure.
According to a first embodiment, the main body is produced by a casting process. The metal-matrix composite material of the main body is preferably produced by a casting process, in which the wear-protection insert has been cast into the metal-matrix material. A
casting process offers the advantage that the main body can be produced particularly easily in a plurality of forms.
The crushing tool is in particular a crushing tooth, which is preferably attached to a secondary crusher or tertiary crusher. The crushing tooth has a substantially chisel-shaped, in particular tooth-shaped, contour with a tip pointing in the direction of rotation of the crushing roll.
The metal-matrix composite material of the main body comprises a metal-matrix material and the wear-protection insert of a hard metal. The metal-matrix material is, for example, high-temperature-resistant steel and/or a ductile steel with a Brinell hardness of approximately 90-500 HB, in particular 120 ¨ 350 HB, preferably 150 HB, and for example an elongation at break of greater than or equal to 18-26%, in particular 14%.
A main body of a metal-matrix composite material can be produced particularly easily and cost-effectively. The wear-protection insert of a hard metal offers reliable wear protection that can be easily introduced on the surface of the crushing tool. The wear-protection insert is preferably produced from a powdered and/or granular mixture of particles (grains) comprising ceramic, aluminum and/or carbide such as boron carbide, tungsten carbide, silicon carbide, wherein the mixture, is mixed, for example with a binder, heated, in particular gassed, and baked. In particular, the mixture is heated in a for example flexible mold that corresponds to the negative form of the wear-protection insert. The mixture then cools and hardens to give a very wear-resistant body with a porous structure.
According to a first embodiment, the main body is produced by a casting process. The metal-matrix composite material of the main body is preferably produced by a casting process, in which the wear-protection insert has been cast into the metal-matrix material. A
casting process offers the advantage that the main body can be produced particularly easily in a plurality of forms.
3 According to a further embodiment, the wear-protection insert is arranged on the surface of the main body. At least one part of the surface of the crushing tool is formed by the wear-protection insert. The wear-protection insert is preferably arranged on the upper surface of the crushing tool, facing outward in the radial direction of the crushing roll.
The wear-protection insert preferably comprises, and is preferably formed completely from, a hard metal such as tungsten carbide, ceramic, titanium carbide, boron carbide or chromium carbide. Hard metal offers the advantage of a particularly wear-resistant surface.
According to a further embodiment, the wear-protection insert is cast at least partially into the main body. In particular, the metal-matrix material and the wear-protection insert are bonded by casting to give the metal-matrix composite material. The wear-protection insert is preferably cast completely into the metal-matrix material.
The wear-protection insert preferably has a thickness of approximately 5mm to 25mm, preferably 10mm to 15mm, and is formed in one piece.
According to a further embodiment, the main body has a plurality of wear-protection inserts, which are cast at least partially into the main body. For example, at least one wear-protection insert is arranged on a side surface facing in the axial direction of the crushing roll. It may likewise be provided that a plurality of wear-protection inserts are fitted on the surface of the crushing tool that is facing outward in the radial direction of the crushing roll. The relatively easy production process of casting the main body makes it possibe to arrange a plurality of wear inserts such that those regions of the crushing tool that are exposed to a high degree of wear comprise a wear-protection insert. For example, the plurality of wear-protection inserts comprises a plurality of particles, in particular hard metal or ceramic particles or diamonds.
Preferably, each wear-protection insert consists of precisely one particle, the wear-protection inserts being in a disordered arrangement in the metal-matrix material.
According to a further embodiment, the wear-protection element is connected in a material-bonding manner, in particular welded, adhesively attached or soldered, to the main body. A
. CA 03066937 2019-12-11 ,
The wear-protection insert preferably comprises, and is preferably formed completely from, a hard metal such as tungsten carbide, ceramic, titanium carbide, boron carbide or chromium carbide. Hard metal offers the advantage of a particularly wear-resistant surface.
According to a further embodiment, the wear-protection insert is cast at least partially into the main body. In particular, the metal-matrix material and the wear-protection insert are bonded by casting to give the metal-matrix composite material. The wear-protection insert is preferably cast completely into the metal-matrix material.
The wear-protection insert preferably has a thickness of approximately 5mm to 25mm, preferably 10mm to 15mm, and is formed in one piece.
According to a further embodiment, the main body has a plurality of wear-protection inserts, which are cast at least partially into the main body. For example, at least one wear-protection insert is arranged on a side surface facing in the axial direction of the crushing roll. It may likewise be provided that a plurality of wear-protection inserts are fitted on the surface of the crushing tool that is facing outward in the radial direction of the crushing roll. The relatively easy production process of casting the main body makes it possibe to arrange a plurality of wear inserts such that those regions of the crushing tool that are exposed to a high degree of wear comprise a wear-protection insert. For example, the plurality of wear-protection inserts comprises a plurality of particles, in particular hard metal or ceramic particles or diamonds.
Preferably, each wear-protection insert consists of precisely one particle, the wear-protection inserts being in a disordered arrangement in the metal-matrix material.
According to a further embodiment, the wear-protection element is connected in a material-bonding manner, in particular welded, adhesively attached or soldered, to the main body. A
. CA 03066937 2019-12-11 ,
4 form-fitting and/or force-fitting connection, such as a screw connection, is also conceivable. The wear-protection element is preferably fitted on the surface of the main body that is facing in the direction of rotation of the crushing rolls and is thus exposed to the greatest degree of wear, since this surface is first to come into contact with the material to be crushed. The wear-protection element is preferably fitted in a cutout in the main body. The cutout is preferably formed on the front side, in particular the side surface of the crushing tool that is facing in the direction of rotation of the crushing roll.
According to a further embodiment, the wear-protection insert has a porous structure. In particular, the wear-protection insert is in the form of a sponge or formed such that infiltration of the metal-matrix material into the wear-protection insert is made possible.
It is likewise conceivable that the wear-protection insert has a smooth, planar structure and the wear-protection insert is bonded to the metal-matrix material by casting only on the surface . The wear-protection insert preferably has the form of a plate and is formed in one piece.
The invention furthermore comprises a roll crusher having two crushing rolls arranged next to one another rotatably oppositely to one another and wherein a crushing gap is formed between the crushing rolls and wherein a crushing tool as claimed in one of the preceding claims is attached to at least one of the crushing rolls. The crushing tool is preferably attached to a shoulder on the surface of the crushing roll. In particular, the main body of the crushing tool is mounted on the surface of the crushing roll, preferably on the shoulder of the crushing roll, and is connected thereto in a material-bonding and/or form-fitting manner.
The invention also comprises a method for producing a crushing tool for attachment to a crushing roll of a roll crusher, comprising the steps of:
- positioning a wear-protection insert of a hard metal in a casting mold for casting a main body of the crushing tool, - casting the main body so that the wear-protection insert is enclosed at least partially by the casting material of the main body and - fitting a wear-protection element of a hard metal on the cast main body.
The wear-protection insert is preferably enclosed completely by the casting material so that the casting material infiltrates into the wear-protection insert. The casting material comprises the metal-matrix material described with reference to the crushing tool.
According to a further embodiment, the wear-protection insert has a porous structure. In particular, the wear-protection insert is in the form of a sponge or formed such that infiltration of the metal-matrix material into the wear-protection insert is made possible.
It is likewise conceivable that the wear-protection insert has a smooth, planar structure and the wear-protection insert is bonded to the metal-matrix material by casting only on the surface . The wear-protection insert preferably has the form of a plate and is formed in one piece.
The invention furthermore comprises a roll crusher having two crushing rolls arranged next to one another rotatably oppositely to one another and wherein a crushing gap is formed between the crushing rolls and wherein a crushing tool as claimed in one of the preceding claims is attached to at least one of the crushing rolls. The crushing tool is preferably attached to a shoulder on the surface of the crushing roll. In particular, the main body of the crushing tool is mounted on the surface of the crushing roll, preferably on the shoulder of the crushing roll, and is connected thereto in a material-bonding and/or form-fitting manner.
The invention also comprises a method for producing a crushing tool for attachment to a crushing roll of a roll crusher, comprising the steps of:
- positioning a wear-protection insert of a hard metal in a casting mold for casting a main body of the crushing tool, - casting the main body so that the wear-protection insert is enclosed at least partially by the casting material of the main body and - fitting a wear-protection element of a hard metal on the cast main body.
The wear-protection insert is preferably enclosed completely by the casting material so that the casting material infiltrates into the wear-protection insert. The casting material comprises the metal-matrix material described with reference to the crushing tool.
5 The advantages and explanations described with reference to the crushing tool likewise apply, correspondingly in method terms, to a method for producing a crushing tool.
According to a first embodiment, the wear-protection element is connected in a material-bonding manner, in particular welded or soldered, to the main body.
Description of the drawings .. The invention is explained in more detail below on the basis of a number of exemplary embodiments with reference to the accompanying figures.
Fig. 1 shows a schematic illustration of a roll crusher having a plurality of crushing tools in a sectional view according to one exemplary embodiment.
Fig. 2 shows a schematic illustration of a crushing tool in a sectional view according to a further exemplary embodiment.
Fig. 3 shows a schematic illustration of a crushing tool in a plan view according to the exemplary embodiment of figure. 2.
Figure 1 shows a roll crusher 10 having two crushing rolls 12, which are arranged next to one another and wherein a crushing gap, in which the material is comminuted, is formed between the crushing rolls 12. Such roll crushers 10 are used, for example, in the oil sand industry in surface mining. The crushing rolls 12 each comprise on their surface a plurality of crushing tools 14, which are arranged circumferentially on the respective crushing roll 12 and, by way of
According to a first embodiment, the wear-protection element is connected in a material-bonding manner, in particular welded or soldered, to the main body.
Description of the drawings .. The invention is explained in more detail below on the basis of a number of exemplary embodiments with reference to the accompanying figures.
Fig. 1 shows a schematic illustration of a roll crusher having a plurality of crushing tools in a sectional view according to one exemplary embodiment.
Fig. 2 shows a schematic illustration of a crushing tool in a sectional view according to a further exemplary embodiment.
Fig. 3 shows a schematic illustration of a crushing tool in a plan view according to the exemplary embodiment of figure. 2.
Figure 1 shows a roll crusher 10 having two crushing rolls 12, which are arranged next to one another and wherein a crushing gap, in which the material is comminuted, is formed between the crushing rolls 12. Such roll crushers 10 are used, for example, in the oil sand industry in surface mining. The crushing rolls 12 each comprise on their surface a plurality of crushing tools 14, which are arranged circumferentially on the respective crushing roll 12 and, by way of
6 example, are uniformly spaced apart from one another. A plurality of shoulders 18 for fastening in each case a crushing tool 14 are formed on the surface of the crushing rolls 12. Each shoulder 18 comprises a substantially planar connecting surface on which the crushing tool 14 is fastened.
The crushing tools 14 are each connected in a material-bonding manner, in particular welded, to the surface of the crushing roll 12. It is likewise conceivable that the crushing tools 14 are additionally or exclusively connected in a form-fitting manner to the crushing roll 12. During operation of the roll crusher 11, the crushing rolls 12 rotate oppositely to one another in the direction of the arrows. The material to be comminuted is loaded from above into the crushing gap 16 and comminuted in the crushing gap 16.
Figures 2 and 3 show a crushing tool 14 for attachment to a crushing roll 12 of a roll crusher 10 according to figure 1. The crushing tool 14 substantially comprises the form of a chisel with, for example, four or more side surfaces. Furthermore, the crushing tool comprises a main body 20 and at least one wear-protection element 24. The wear-protection element 24 is formed from a hard metal, such as for example sintered carbide hard metals, such as tungsten carbide, that have a high hardness, wear resistance and heat resistance and corrosion resistance.
Hard metals comprise for example 90-94% tungsten carbide and 6-10% cobalt. The wear-protection element 24 is arranged on the side surface of the crushing tool 14 that is facing in the direction of rotation of the crushing roll 12. The main body 20 has a cutout 26, in which the wear-protection element 24 is fitted, on its side surface facing in the direction of rotation of the crushing roll 12. The cutout 26 extends along the radially outer edge of the side surface of the crushing tool 14. The wear-protection element 24 is fitted completely within the cutout 26 of the main body 20 and finishes flush with the main body 20 on all of the side surfaces of the crushing tool 14. It is likewise conceivable that the wear-protection element 24 protrudes beyond the main body at the side surfaces of the crushing tool 14. The wear-protection element 24 is for example connected in a material-bonding manner and/or connected in a form-fitting manner, in particular welded, sintered, adhesively attached, soldered or screwed to the main body 20.
The main body 20 is formed from a metal-matrix composite material and comprises a wear-protection insert 22. The wear-protection insert 22 is arranged on the side surface of the crushing tool 14 that is facing outward in the radial direction of the crushing roll 12 and said wear-= CA 03066937 2019-12-11
The crushing tools 14 are each connected in a material-bonding manner, in particular welded, to the surface of the crushing roll 12. It is likewise conceivable that the crushing tools 14 are additionally or exclusively connected in a form-fitting manner to the crushing roll 12. During operation of the roll crusher 11, the crushing rolls 12 rotate oppositely to one another in the direction of the arrows. The material to be comminuted is loaded from above into the crushing gap 16 and comminuted in the crushing gap 16.
Figures 2 and 3 show a crushing tool 14 for attachment to a crushing roll 12 of a roll crusher 10 according to figure 1. The crushing tool 14 substantially comprises the form of a chisel with, for example, four or more side surfaces. Furthermore, the crushing tool comprises a main body 20 and at least one wear-protection element 24. The wear-protection element 24 is formed from a hard metal, such as for example sintered carbide hard metals, such as tungsten carbide, that have a high hardness, wear resistance and heat resistance and corrosion resistance.
Hard metals comprise for example 90-94% tungsten carbide and 6-10% cobalt. The wear-protection element 24 is arranged on the side surface of the crushing tool 14 that is facing in the direction of rotation of the crushing roll 12. The main body 20 has a cutout 26, in which the wear-protection element 24 is fitted, on its side surface facing in the direction of rotation of the crushing roll 12. The cutout 26 extends along the radially outer edge of the side surface of the crushing tool 14. The wear-protection element 24 is fitted completely within the cutout 26 of the main body 20 and finishes flush with the main body 20 on all of the side surfaces of the crushing tool 14. It is likewise conceivable that the wear-protection element 24 protrudes beyond the main body at the side surfaces of the crushing tool 14. The wear-protection element 24 is for example connected in a material-bonding manner and/or connected in a form-fitting manner, in particular welded, sintered, adhesively attached, soldered or screwed to the main body 20.
The main body 20 is formed from a metal-matrix composite material and comprises a wear-protection insert 22. The wear-protection insert 22 is arranged on the side surface of the crushing tool 14 that is facing outward in the radial direction of the crushing roll 12 and said wear-= CA 03066937 2019-12-11
7 protection insert 22 finishes flush with the side surface of the main body 20.
A connecting surface for connecting the main body 20 to the surface of the crushing rolls 12 is formed on the bottom surface, lying opposite the wear-protection insert 22, of the main body 20.
The main body 20 is preferably connected in a material-bonding manner to the shoulder 18 of the crushing roll 12.
The wear-protection insert 22 protrudes, by way of example, from the main body 20 on those side surfaces of the crushing tool 14 that are facing in the axial direction of the crushing roll 12.
The wear-protection insert 22 is formed, for example, from a hard metal, such as tungsten carbide, ceramic, titanium carbide, boron carbide or chromium carbide. In particular, the wear-protection insert 22, as shown in figure 2, comprises a honeycomb-shaped structure. Further porous structures of the wear-protection insert 22 are also conceivable, this being formed in such a way that infiltration of the metal-matrix material into the wear-protection insert 22 is made possible. The wear-protection insert 22 is formed in one piece and has for example a thickness of 5mm to 25mm, preferably 10mm to 15mm.
The main body is formed from the metal-matrix material, the wear-protection insert 22 at least partially being enclosed by, in particular being cast into, a metal-matrix material. The metal-matrix material is for example high-temperature-resistant steel and/or a steel with a Brinell hardness of approximately 150 ¨ 400 HB. A high-temperature-resistant steel is understood to mean a heat-resistant steel with a high chromium-nickel content that has a temperature resistance of up to 650 C, in particular up to 1000 C. Such steels are for example austenitic chromium-nickel steels, such as for example GX25CrNiSi18-9, GX40CrNiSi25-12, GX40NiCrSiNb35-26. High-temperature-resistant steels to 600 C are for example steels in accordance with DIN EN 10213. High-temperature-resistant steels to 1200 C are for example steels in accordance with DIN EN 10295.
In the exemplary embodiment of figures 2 and 3, the wear-protection insert 22 extends, by way of example, over a part of the radially outwardly facing side surface of the main body 20. It is likewise conceivable that the wear-protection insert 22 extends over the entire radially outwardly facing side surface and/or further side surfaces of the main body 20. The wear-protection insert forms at least one part of the surface of the main body 20.
. = CA 03066937 2019-12-11 g In the production of the crushing tool 14, a the wear-protection insert 22 of hard metal, such as tungsten carbide, ceramic, titanium carbide, boron carbide or chromium carbide, is positioned, for example fastened, in a casting mold for casting a main body 20 of the crushing tool 14. The wear-protection insert 22 comprises for example the form of a plate and is positioned on the upper side, in particular the side surface of the crushing tool 14 that is facing radially outward in the direction of the crushing roll 12. The main body 20 is then cast from the metal-matrix material so that the wear-protection insert 22 is enclosed at least partially by the casting material of the main body 20, the casting material for example infiltrating into the porous structure of the wear-protection insert 22. In particular, the wear-protection insert 22 is enclosed completely by the casting material. The wear-protection element 22 is then fastened, in particular soldered, to the main body 20. The main body 20 is preferably machined in advance on the connecting surfaces that are connected to the wear-protection element 24 so that the connecting surfaces have a low roughness of RZ= 1.6 ¨ 10 and/or RA=0.4-1, preferably RZ=6.
=
List of reference signs Roll crusher 12 crushing roll 14 Crushing tool 5 16 Crushing gap 18 Shoulder Main body 22 Wear-protection insert 24 Wear-protection element 10 26 Cutout
A connecting surface for connecting the main body 20 to the surface of the crushing rolls 12 is formed on the bottom surface, lying opposite the wear-protection insert 22, of the main body 20.
The main body 20 is preferably connected in a material-bonding manner to the shoulder 18 of the crushing roll 12.
The wear-protection insert 22 protrudes, by way of example, from the main body 20 on those side surfaces of the crushing tool 14 that are facing in the axial direction of the crushing roll 12.
The wear-protection insert 22 is formed, for example, from a hard metal, such as tungsten carbide, ceramic, titanium carbide, boron carbide or chromium carbide. In particular, the wear-protection insert 22, as shown in figure 2, comprises a honeycomb-shaped structure. Further porous structures of the wear-protection insert 22 are also conceivable, this being formed in such a way that infiltration of the metal-matrix material into the wear-protection insert 22 is made possible. The wear-protection insert 22 is formed in one piece and has for example a thickness of 5mm to 25mm, preferably 10mm to 15mm.
The main body is formed from the metal-matrix material, the wear-protection insert 22 at least partially being enclosed by, in particular being cast into, a metal-matrix material. The metal-matrix material is for example high-temperature-resistant steel and/or a steel with a Brinell hardness of approximately 150 ¨ 400 HB. A high-temperature-resistant steel is understood to mean a heat-resistant steel with a high chromium-nickel content that has a temperature resistance of up to 650 C, in particular up to 1000 C. Such steels are for example austenitic chromium-nickel steels, such as for example GX25CrNiSi18-9, GX40CrNiSi25-12, GX40NiCrSiNb35-26. High-temperature-resistant steels to 600 C are for example steels in accordance with DIN EN 10213. High-temperature-resistant steels to 1200 C are for example steels in accordance with DIN EN 10295.
In the exemplary embodiment of figures 2 and 3, the wear-protection insert 22 extends, by way of example, over a part of the radially outwardly facing side surface of the main body 20. It is likewise conceivable that the wear-protection insert 22 extends over the entire radially outwardly facing side surface and/or further side surfaces of the main body 20. The wear-protection insert forms at least one part of the surface of the main body 20.
. = CA 03066937 2019-12-11 g In the production of the crushing tool 14, a the wear-protection insert 22 of hard metal, such as tungsten carbide, ceramic, titanium carbide, boron carbide or chromium carbide, is positioned, for example fastened, in a casting mold for casting a main body 20 of the crushing tool 14. The wear-protection insert 22 comprises for example the form of a plate and is positioned on the upper side, in particular the side surface of the crushing tool 14 that is facing radially outward in the direction of the crushing roll 12. The main body 20 is then cast from the metal-matrix material so that the wear-protection insert 22 is enclosed at least partially by the casting material of the main body 20, the casting material for example infiltrating into the porous structure of the wear-protection insert 22. In particular, the wear-protection insert 22 is enclosed completely by the casting material. The wear-protection element 22 is then fastened, in particular soldered, to the main body 20. The main body 20 is preferably machined in advance on the connecting surfaces that are connected to the wear-protection element 24 so that the connecting surfaces have a low roughness of RZ= 1.6 ¨ 10 and/or RA=0.4-1, preferably RZ=6.
=
List of reference signs Roll crusher 12 crushing roll 14 Crushing tool 5 16 Crushing gap 18 Shoulder Main body 22 Wear-protection insert 24 Wear-protection element 10 26 Cutout
Claims (14)
1. A crushing tool (14) for attachment to a crusher roller (12) of a roll crusher (10), comprising a main body (20), which can be mounted on the crusher roller (12), and at least one wear-protection element (24) fastened to the main body (20), wherein the wear-protection element (24) is formed from a hard metal, characterized in that the main body (20) is formed from a metal matrix composite material which comprises a wear-protection insert (22) of a hard metal.
2. The crushing tool (14) as claimed in claim 1, wherein the main body is produced by a casting process.
3. The crushing tool (14) as claimed in either of the preceding claims, wherein the wear-protection insert (22) is arranged on the surface of the main body (20).
4. The crushing tool (14) as claimed in one of the preceding claims, wherein the wear-protection insert (22) and/or the wear-protection element (24) comprises tungsten carbide, ceramic, titanium carbide, boron carbide or chromium carbide.
5. The crushing tool (14) as claimed in one of the preceding claims, wherein the wear-protection insert (22) is cast at least partially into the main body (20).
6. The crushing tool (14) as claimed in one of the preceding claims, wherein the wear-protection insert (22) comprises a thickness of approximately 5mm to 25mm, preferably 10mm to 15mm.
7. The crushing tool (14) as claimed in one of the preceding claims, wherein the main body (20) has a plurality of wear-protection inserts (22) which are cast at least partially into the main body (20).
8. The crushing tool (14) as claimed in one of the preceding claims, wherein the wear-protection element (24) and/or the wear-protection insert (22) is connected in a material-bonding manner, in particular welded, sintered, adhesively attached or soldered, to the main body (20).
9. The crushing tool (14) as claimed in one of the preceding claims, wherein the wear-protection element (24) is fitted in a cutout (26) in the main body (20).
10. The crushing tool (14) as claimed in one of the preceding claims, wherein the wear-protection insert (22) is arranged on the side surface of the crushing tool (12) that is facing outward in the radial direction of the crusher roller (12).
11. The crushing tool (14) as claimed in one of the preceding claims, wherein the wear-protection insert (22) has a porous structure.
12. A roll crusher (10) having two crusher rollers (12) arranged next to one another rotatably oppositely to one another and wherein a crushing gap (16) is formed between the crusher rollers (12), wherein a crushing tool (14) as claimed in one of the preceding claims is attached to at least one of the crusher rollers (12).
13. A method for producing a crushing tool (14) for attachment to a crusher roller (12) of a roll crusher (10), comprising the steps of:
- positioning a wear-protection insert (22) of a hard metal in a casting mold for casting a main body (20) of the crushing tool (14), - casting the main body (20), so that the wear-protection insert (22) is enclosed at least partially by the casting material of the main body (20) and - fitting a wear-protection element (22) of a hard metal on the cast main body.
- positioning a wear-protection insert (22) of a hard metal in a casting mold for casting a main body (20) of the crushing tool (14), - casting the main body (20), so that the wear-protection insert (22) is enclosed at least partially by the casting material of the main body (20) and - fitting a wear-protection element (22) of a hard metal on the cast main body.
14. The method as claimed in claim 13, wherein the wear-protection element (22) is connected in a material-bonding manner bonded to the main body (20).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017210780.4 | 2017-06-27 | ||
| DE102017210780.4A DE102017210780B3 (en) | 2017-06-27 | 2017-06-27 | Breaking tool and method for producing a breaking tool |
| PCT/EP2018/066884 WO2019002172A1 (en) | 2017-06-27 | 2018-06-25 | Crushing tool and method for producing a crushing tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA3066937A1 true CA3066937A1 (en) | 2019-01-03 |
| CA3066937C CA3066937C (en) | 2021-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3066937A Active CA3066937C (en) | 2017-06-27 | 2018-06-25 | Crushing tool and method for producing a crushing tool |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA3066937C (en) |
| DE (1) | DE102017210780B3 (en) |
| WO (1) | WO2019002172A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3643156B1 (en) * | 2018-10-23 | 2021-11-24 | Exel Industries | Insert for a share for uprooting root crop, corresponding set of inserts, share and methods of manufacture and maintenance |
| EP3908703B1 (en) * | 2019-01-11 | 2023-01-25 | FLSmidth A/S | Tooth for attaching to an excavator bucket |
| CN112756589A (en) * | 2021-01-22 | 2021-05-07 | 河北智方机械制造有限公司 | Casting method of wear-resistant segment of replaceable segment type wear-resistant roll sleeve of roll squeezer |
| CN113663778A (en) * | 2021-08-20 | 2021-11-19 | 郑州机械研究所有限公司 | Novel roller crusher middle roller with structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT325398B (en) * | 1972-09-21 | 1975-10-27 | Ver Edelstahlwerke Ag | BLOW ROLLERS FOR IMPACT MILLS |
| DE4123967A1 (en) | 1991-07-19 | 1993-01-21 | Krupp Industrietech | Machine for crushing stone - has replaceable teeth which are attached to crushing rollers by rings |
| US20110248550A1 (en) * | 2010-04-13 | 2011-10-13 | Brook Hugh Knotts | Weld-on cast carbon steel roll crusher tooth having silver-brazed tungsten carbide inserts on wear surfaces |
| EP2940169A1 (en) | 2014-04-30 | 2015-11-04 | Sandvik Intellectual Property AB | A wear resistant component and a device for mechanical decomposition of material provided with such a component |
| DE102015222020A1 (en) * | 2015-11-09 | 2017-05-11 | Thyssenkrupp Ag | Tool for machining abrasive materials |
-
2017
- 2017-06-27 DE DE102017210780.4A patent/DE102017210780B3/en active Active
-
2018
- 2018-06-25 WO PCT/EP2018/066884 patent/WO2019002172A1/en active Application Filing
- 2018-06-25 CA CA3066937A patent/CA3066937C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA3066937C (en) | 2021-11-16 |
| WO2019002172A1 (en) | 2019-01-03 |
| DE102017210780B3 (en) | 2018-05-17 |
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