CN212882696U - Easily-processed and repairable high-wear-resistance metal ceramic composite grinding roller - Google Patents
Easily-processed and repairable high-wear-resistance metal ceramic composite grinding roller Download PDFInfo
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- CN212882696U CN212882696U CN202020614488.8U CN202020614488U CN212882696U CN 212882696 U CN212882696 U CN 212882696U CN 202020614488 U CN202020614488 U CN 202020614488U CN 212882696 U CN212882696 U CN 212882696U
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Abstract
The utility model discloses an easily-processed and repairable high-wear-resistance metal ceramic composite grinding roller, which comprises a ceramic prefabricated part, a metal ceramic composite roller skin lining plate, a grinding roller core, a clamping groove, wear-resistant alloy and carbon steel, wherein the ceramic prefabricated part is fixed on the surface of a roller skin lining plate casting mold cavity, and the metal ceramic roller skin lining plate which is respectively a ceramic prefabricated part/wear-resistant alloy/carbon steel three-layer is obtained by pouring wear-resistant alloy metal liquid and carbon steel metal liquid in sequence vertically and downwards from a working surface; the grinding roller core is formed by casting a parent metal material, the small end of the metal ceramic composite roller skin lining plate is assembled in the small end of the grinding roller core provided with the clamping groove, and the large end of the grinding roller core are welded and fixed in a full-welding mode. After the grinding roller of the utility model is worn later, the roller core does not need to be replaced, the welding seam can be polished, and the roller shell lining plate which is seriously worn is removed; the working surface of the grinding roller is formed by the abrasion-resistant alloy and the metal ceramic composite material in a staggered mode, is honeycomb-shaped and has double abrasion-resistant performance.
Description
Technical Field
The utility model relates to an workable, repairable high wear-resisting cermet composite grinding roller, applicable grinding roller in trades such as thermal power, cement, metallurgy, mine.
Background
In industries such as electric power, cement, metallurgy, mine and the like, the grinding roller is widely used in a powder making system and is used as a main wear-resistant part, and the wear resistance of the grinding roller directly influences the operation rate of powder making, the quality of pulverized coal, the consumption of the grinding roller and the production cost. Any grinding roller material is abraded seriously under the working condition of pulverizing, so that the coal powder efficiency of the coal mill is reduced after the grinding roller is abraded by serious pits and grooves, and the output of the coal mill is insufficient.
Most of grinding rollers used in the existing thermal power plant are integrally cast by high-chromium cast iron, so that the cost is high and the grinding processing is difficult. The service life of the grinding roller can be prolonged by repeatedly overlaying the wear-resistant alloy layer on the grinding roller after operation and abrasion, but the times are limited, the cost is high, the phenomenon that the overlaying layer falls off is easy to occur, meanwhile, the frequent shutdown maintenance of a power plant causes great economic loss, and the service life is generally 6000-plus 8000 hours.
In order to prolong the service life of the grinding roller, the metal ceramic composite grinding roller is gradually adopted in the current power plant, and the service life can reach 2-3 times of that of a surfacing material. The mature structural forms of the metal ceramic composite grinding roller comprise two types, namely one-time casting molding and secondary casting molding. The one-time casting molding process is formed by pouring a high-chromium cast iron material into a ceramic core plate once, so that the service life of the grinding roller is prolonged, the worn waste grinding roller cannot be used after surfacing, the waste grinding roller cannot be directly recycled, a large amount of carbon planing and labor cost are required, the use frequency of a furnace lining material of the intermediate frequency furnace is seriously influenced, and the maintenance cost of the intermediate frequency furnace is increased. The composite grinding roller is prepared by a secondary casting molding process, firstly, the ceramic grid body is cast by high-chromium cast iron to prepare the metal ceramic composite wear-resistant part, then, the nodular cast iron is cast for the second time on the metal ceramic composite wear-resistant part to prepare the composite grinding roller, the cost of the high-chromium cast iron integrally cast grinding roller is reduced, the used grinding roller cannot be used by overlaying welding, and the used grinding roller is high in use cost after being returned to a furnace again. For users, although the use of the metal ceramic grinding roller can realize 2-3 times of the original surfacing material, the defect that the two processes have the defects that the surfacing cannot be reused in the later period is overcome, and the problem that the purchasing of the metal ceramic composite grinding roller again needs a large amount of capital cost becomes an important reason that the product cannot be popularized widely. The metal ceramic composite grinding roller with the detachable structure can realize repairable of the grinding roller by detaching and replacing the roller shell lining plate with the wear-resistant layer on the surface of the roller core, but the roller shell lining plate is not easy to process, so that the roller shell lining plate is poor in matching quality with the roller core, vibration is easily generated during working, the roller shell lining plate is even broken, and the grinding roller is scrapped.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims to solve the defects in the prior art, and provides a high wear-resistant metal ceramic composite grinding roller which is easy to process and repair, after the grinding roller is worn later, the roller core does not need to be replaced, the welding seam can be polished, and the roller shell lining plate which is seriously worn is removed; the working surface of the grinding roller is formed by the abrasion-resistant alloy and the metal ceramic composite material in a staggered mode, is honeycomb-shaped and has double abrasion-resistant performance.
The technical scheme is as follows: the utility model relates to an easy processing, repairable high wear-resisting cermet compound grinding roller, including ceramic prefab, cermet compound roller skin welt, grinding roller core, draw-in groove, wear-resisting alloy and carbon steel, cermet compound roller skin welt be by ceramic prefab with wear-resisting alloy, carbon steel combine to form, ceramic prefab fixes on roller skin welt casting mould cavity surface, obtains the cermet roller skin welt that is ceramic prefab/wear-resisting alloy/carbon steel three-layer respectively perpendicularly downwards by the working face through pouring wear-resisting alloy molten metal, carbon steel molten metal in order; the grinding roller core is formed by casting a parent metal material, the small end of the metal ceramic composite roller skin lining plate is assembled in the small end of the grinding roller core provided with the clamping groove, and the large end of the metal ceramic composite roller skin lining plate and the large end of the grinding roller core are welded and fixed in a full-welding mode.
Further, the surface of the ceramic prefabricated part is in a honeycomb shape or a grid shape.
Further, the thickness of the ceramic prefabricated member is 10-60 mm.
Further, the bottom surface of the ceramic prefabricated member is a plane or a curved surface.
Furthermore, a clamping groove is arranged in the small head of the roller core of the grinding roller, the clamping groove is in an arc shape or an inverted angle shape, and the angle is smaller than 90 degrees.
Furthermore, a welding groove is arranged on the large end of the metal ceramic composite roller skin lining plate.
Further, the wear-resistant alloy is high-chromium cast iron or high-manganese steel.
Further, the carbon steel is low-carbon steel or medium-carbon steel.
Further, the parent metal material is one of nodular cast iron, low-carbon steel or medium-carbon steel.
Furthermore, the large end of the metal ceramic composite roller skin lining plate is fixedly connected with the large end of the roller core of the grinding roller through a key groove and flat iron.
Has the advantages that: the utility model has the advantages as follows:
(1) the non-processing surface of the roller shell lining plate is made of common cast steel materials, the processing is easy, the inner arc mounting surface adopts a groove-shaped structure, the polishing area can be reduced when the inner arc mounting surface is assembled with a roller core, and the production cost is reduced;
(2) the roller core is made of common metal materials, so that the hardness is low, the processing is easy, and the machining cost is greatly reduced;
(3) after the grinding roller is worn later, the roller core does not need to be replaced, the welding seam can be polished, the roller shell lining plate which is seriously worn is removed, and the new roller shell lining plate is installed and replaced and then welded, so that the repairability of the ceramic grinding roller can be realized, and the purchase cost of the grinding roller is greatly reduced;
(4) the working surface of the grinding roller is formed by the abrasion-resistant alloy and the metal ceramic composite material in a staggered manner, is honeycomb-shaped, has double abrasion resistance, and improves the service life of the higher-chromium cast iron grinding roller by more than 2 times;
(5) the difficult problem that the metal ceramic composite grinding roller is difficult to repair can be solved, and meanwhile, the production cost is reduced.
Drawings
FIG. 1 is a sectional view of the composite grinding roller of the present invention;
FIG. 2 is a schematic view of the three-dimensional structure of the composite grinding roller of the present invention;
FIG. 3 is a schematic structural view of the honeycomb ceramic preform of the present invention;
FIG. 4 is a cross-sectional view of the structure of FIG. 3;
FIG. 5 is a schematic structural view of the roll skin lining plate of the present invention;
FIG. 6 is a cross-sectional view of the structure of FIG. 5;
FIG. 7 is a schematic structural view of the roll core of the present invention;
FIG. 8 is a cross-sectional view of the structure of FIG. 7;
fig. 9 is a schematic structural view of the clamp of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
Example 1
The easily-processed and repairable high-wear-resistance metal ceramic composite grinding roller comprises a ceramic prefabricated part 1, a metal ceramic composite roller skin lining plate 2, a grinding roller core 3, a clamping groove 4, a wear-resistant alloy 5 and carbon steel 6, wherein the ceramic prefabricated part 1 is fixed on the surface of a roller skin lining plate casting mold cavity, two materials of wear-resistant alloy metal liquid and carbon steel metal liquid are sequentially poured, a ceramic prefabricated part is preferentially infiltrated by the wear-resistant alloy, and the carbon steel is metallurgically combined with the wear-resistant alloy to obtain the metal ceramic composite roller skin lining plate 2 with three layers of the ceramic prefabricated part, the wear-resistant alloy and the carbon steel from the vertical downward working surface.
The grinding roller core 3 is cast by a parent metal material, firstly, the parent metal material forms molten metal, and then the molten metal is poured into a casting mold cavity to obtain the grinding roller core 3. The small end of the metal ceramic composite roll skin lining plate 2 is assembled in the small end of the roll core 3 of the grinding roll provided with the clamping groove 4, and the large end of the metal ceramic composite roll skin lining plate 2 and the large end of the roll core 3 of the grinding roll are welded and fixed in a full-welding mode.
As a further optimization of the above embodiment:
in this embodiment, preferably, the surface of the ceramic preform 1 is in a honeycomb or grid shape. Further, the thickness of the ceramic preform 1 is 10-60 mm. Further, the bottom surface of the ceramic prefabricated member 1 is a plane or a curved surface.
In the embodiment, preferably, in order to facilitate fixing, a clamping groove 4 is formed in the small end of the grinding roller core 3, the clamping groove 4 is in an arc shape or a chamfer shape, and the angle is smaller than 90 degrees.
In this embodiment, preferably, in order to facilitate welding, a welding groove is provided on the large end of the metal ceramic composite roll skin lining plate 2.
In this embodiment, preferably, in order to further improve the wear resistance of the composite grinding roller, the wear-resistant alloy 5 is high-chromium cast iron or high-manganese steel, and the carbon steel 6 is low-carbon steel or medium-carbon steel.
In this embodiment, preferably, the parent metal material is one of ductile iron, low-carbon steel or medium-carbon steel.
Wherein, the surface of the ceramic prefabricated member 1 is in a honeycomb shape or a grid shape, the thickness of the ceramic prefabricated member is 10-60mm, and the surface of the ceramic prefabricated member is a plane or a curved surface.
During assembly, the small end of the metal ceramic composite roll skin lining plate 2 after machining is assembled in the small end of the roll core provided with the clamping groove 4, the clamping groove is arc-shaped or chamfered, and the angle is smaller than 90 degrees. Fixing the metal ceramic composite roll skin lining plate 2 on the surface of the roll core 3 of the grinding roll by using a circumferential hoop (as shown in figure 9), forming a welding groove on the large head of the metal ceramic roll skin lining plate, fully welding the large head of the roll core, and removing the hoop after welding is finished to obtain the easily-processed and repairable high-wear-resistance metal ceramic composite grinding roll compounded by the metal ceramic composite roll skin lining plate 2 and the roll core 3 of the grinding roll.
The manufacturing method of the easily-processed and repairable high-wear-resistance metal ceramic composite grinding roller comprises the following steps:
(1) carrying out surface metallization pretreatment on ceramic particles with the particle size of 8-20 meshes;
(2) uniformly mixing the pretreated ceramic particles with a binder according to a certain proportion, wherein the addition amount of the binder is 2-8% of the mass of the ceramic;
(3) adding a certain proportion of ceramic powder into the mixture obtained in the step (2) and uniformly mixing to obtain a particle mixture, wherein the particle size of the ceramic powder is 200-500 meshes, and the adding amount is 1-10% of the mass of the mixture;
(4) uniformly loading the particle mixture obtained in the step (3) into a foamed ceramic boat mould, putting the whole ceramic boat after compaction into a drying oven for drying at 50-200 ℃ for 24-72 hours, and demoulding after drying out of the oven to obtain a ceramic prefabricated member;
(5) fixing the ceramic prefabricated part in the step (4) on the surface of the casting mold cavity of the roll skin lining plate, placing a sand box on a vibration platform, and then pouring two materials of wear-resistant alloy metal liquid and carbon steel metal liquid in sequence, wherein the ceramic prefabricated part is preferentially infiltrated by the wear-resistant alloy metal liquid, and the carbon steel is metallurgically bonded with the wear-resistant alloy to obtain a metal ceramic roll skin lining plate which is respectively provided with three layers of a ceramic prefabricated part/wear-resistant alloy/carbon steel from the vertical downward working surface;
(6) carrying out heat treatment on the metal ceramic roller skin lining plate obtained in the step (5) to enable the working surface hardness to reach 58-62HRC, and machining the metal ceramic roller skin lining plate subjected to heat treatment;
(7) smelting a parent metal material to form molten metal, pouring the molten metal into a casting mold cavity to obtain a roller core of the grinding roller, assembling the small end of the metal ceramic roller skin lining plate processed in the step (6) in the small end of the roller core provided with a clamping groove, fixing the metal ceramic roller skin lining plate on the circumferential surface of the roller core by using a circumferential clamp, performing full-weld welding with the large end of the roller core, and removing the clamp after the welding is finished to obtain the easily-processed and repairable high-wear-resistance metal ceramic composite grinding roller compounded by the metal ceramic roller skin lining plate and the roller core.
Example 2
Different from the embodiment 1, in order to facilitate the disassembly and repair, the large end of the metal ceramic composite roll skin lining plate 2 is fixedly connected with the large end of the roll core 3 of the grinding roll through a key groove and a flat iron, and the final assembly specifically comprises the following steps:
(1) the metal ceramic composite roll skin lining plate 2 is machined, a threaded hole is drilled in the upper end face of the reference lining plate, and key grooves are formed in the upper end faces of other lining plates.
(2) Smelting a parent metal material to form molten metal, pouring the molten metal into a casting mold cavity to obtain a roller core of the grinding roller, sequentially assembling the small ends of the lining plates of the roller skin with the key grooves in the step (1) on the small ends of the roller core with the groove structure, installing 1 lining plate of the roller skin, knocking flat iron into the key grooves on the contact surface of the upper ends (large ends) of the roller core and the lining plates of the roller skin to be locked and fixed, inserting the pin shaft into the semicircular groove on the side surface of the lining plate of the roller skin, and pressing and fixing the pin shaft by the two lining plates when the adjacent lining plates of the roller skin are installed. Assembling the large head of the reference roller skin lining plate at the corresponding position of the roller core with a threaded hole, and fixing the reference roller skin lining plate on the surface of the roller core by using a spherical bolt plug. And the pin shaft penetrates through the through hole of the roller core and is inserted into a hole between the side contact surfaces of the two lining plates. And covering resin gaskets on the spherical bolt plugs and the pin shafts and fully welding.
The roller shell lining plate and the roller core are internally fixed by a key groove, a clamping groove and the like in a large quantity, the roller shell lining plate is fixed on the roller core through bending stress generated by deformation of knocked-in flat iron, a bolt structure of the end face of the roller shell lining plate is replaced, machining steps such as punching are reduced, meanwhile, even if the end face of a grinding roller is abraded, a spherical plug in a hole, a pin shaft and the flat iron in the key groove cannot be abraded, meanwhile, the pin shaft can enable the roller shell lining plate to be fixed on the surface of the roller core after being abraded to generate cracks, and safety and reliability in operation of equipment are guaranteed. After the grinding roller is worn in the later period, the roller core does not need to be replaced, the welding seam can be polished, the resin gasket is taken out, the roller shell lining plate which is seriously worn is detached, and a new roller shell lining plate is installed and replaced, so that the repairability of the ceramic grinding roller can be realized, and the purchase cost of the grinding roller is greatly reduced.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (10)
1. The utility model provides an easy processing, high wear resistant cermet composite grinding roller of repairable which characterized in that: the metal ceramic composite roll skin lining plate is characterized by comprising a ceramic prefabricated part (1), a metal ceramic composite roll skin lining plate (2), a grinding roll core (3), a clamping groove (4), a wear-resistant alloy (5) and carbon steel (6), wherein the metal ceramic composite roll skin lining plate (2) is formed by combining the ceramic prefabricated part (1), the wear-resistant alloy (5) and the carbon steel (6), the ceramic prefabricated part (1) is fixed on the surface of a casting mold cavity of the roll skin lining plate, and the working surface of the metal ceramic composite roll skin lining plate is vertically downward and respectively provided with three layers of the ceramic prefabricated part, the wear-resistant alloy and; the grinding roller core (3) is formed by casting a parent metal material, the small end of the metal ceramic composite roller skin lining plate (2) is assembled in the small end of the grinding roller core (3) provided with the clamping groove (4), and the large end of the metal ceramic composite roller skin lining plate (2) and the large end of the grinding roller core (3) are welded and fixed in a full-length welding mode.
2. The easily machined, repairable and highly wear-resistant cermet composite grinding roller of claim 1, further comprising: the surface of the ceramic prefabricated part (1) is in a honeycomb shape or a grid shape.
3. The easily machined, repairable high wear resistant cermet composite grinding roller of claim 1 or 2 wherein: the thickness of the ceramic prefabricated part (1) is 10-60 mm.
4. The easily machined, repairable high wear resistant cermet composite grinding roller of claim 1 or 2 wherein: the bottom surface of the ceramic prefabricated part (1) is a plane or a curved surface.
5. The easily machined, repairable and highly wear-resistant cermet composite grinding roller of claim 1, further comprising: a clamping groove (4) is arranged in the small end of the grinding roller core (3), the clamping groove (4) is arc-shaped or inverted-angle-shaped, and the angle is smaller than 90 degrees.
6. The easily machined, repairable and highly wear-resistant cermet composite grinding roller of claim 1, further comprising: the big end of the metal ceramic composite roll skin lining plate (2) is provided with a welding groove.
7. The easily machined, repairable and highly wear-resistant cermet composite grinding roller of claim 1, further comprising: the wear-resistant alloy (5) is high-chromium cast iron or high-manganese steel.
8. The easily machined, repairable and highly wear-resistant cermet composite grinding roller of claim 1, further comprising: the carbon steel (6) is low-carbon steel or medium-carbon steel.
9. The easily machined, repairable and highly wear-resistant cermet composite grinding roller of claim 1, further comprising: the matrix metal material is one of nodular cast iron, low-carbon steel or medium-carbon steel.
10. The easily machined, repairable and highly wear-resistant cermet composite grinding roller of claim 1, further comprising: the large end of the metal ceramic composite roll skin lining plate (2) is fixedly connected with the large end of the grinding roll core (3) through a key groove and flat iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020614488.8U CN212882696U (en) | 2020-04-22 | 2020-04-22 | Easily-processed and repairable high-wear-resistance metal ceramic composite grinding roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020614488.8U CN212882696U (en) | 2020-04-22 | 2020-04-22 | Easily-processed and repairable high-wear-resistance metal ceramic composite grinding roller |
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| CN212882696U true CN212882696U (en) | 2021-04-06 |
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| CN202020614488.8U Active CN212882696U (en) | 2020-04-22 | 2020-04-22 | Easily-processed and repairable high-wear-resistance metal ceramic composite grinding roller |
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