CN114950636A - Armored nail roller sleeve and preparation method thereof - Google Patents
Armored nail roller sleeve and preparation method thereof Download PDFInfo
- Publication number
- CN114950636A CN114950636A CN202210635574.0A CN202210635574A CN114950636A CN 114950636 A CN114950636 A CN 114950636A CN 202210635574 A CN202210635574 A CN 202210635574A CN 114950636 A CN114950636 A CN 114950636A
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- Prior art keywords
- nail
- armor
- wear
- roller sleeve
- nails
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- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000000227 grinding Methods 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 42
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 36
- 238000004873 anchoring Methods 0.000 claims description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 229910052742 iron Inorganic materials 0.000 claims description 21
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 18
- 229910052750 molybdenum Inorganic materials 0.000 claims description 18
- 239000011733 molybdenum Substances 0.000 claims description 18
- 229910052759 nickel Inorganic materials 0.000 claims description 18
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 15
- 239000000956 alloy Substances 0.000 claims description 14
- 210000000078 claw Anatomy 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 229910052804 chromium Inorganic materials 0.000 claims description 12
- 239000011651 chromium Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 9
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims description 9
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 9
- 238000009750 centrifugal casting Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 6
- 229910017052 cobalt Inorganic materials 0.000 claims description 6
- 239000010941 cobalt Substances 0.000 claims description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000011068 loading method Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 238000007670 refining Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 238000009826 distribution Methods 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 4
- 235000019738 Limestone Nutrition 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000006028 limestone Substances 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 description 6
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Images
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/004—Shape or construction of rollers or balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/02—Centrifugal casting; Casting by using centrifugal force of elongated solid or hollow bodies, e.g. pipes, in moulds rotating around their longitudinal axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/38—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for roll bodies
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/10—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on titanium carbide
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F2005/005—Article surface comprising protrusions
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Food Science & Technology (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention provides an armor nail roller sleeve and a preparation method thereof, and belongs to the technical field of wear-resistant equipment. The armor nail roller sleeve comprises a wear-resistant roller sleeve body and armor nails distributed on the working surface of the wear-resistant roller sleeve body in an array mode, the inner ends of the armor nails are cast in the wear-resistant roller sleeve body, the outer ends of the armor nails are exposed outside the working surface of the wear-resistant roller sleeve body, the armor nails are of cylindrical or conical structures with cross sections being regular hexagons or equilateral hexagons, and a group of side faces parallel to each other is arranged between every two adjacent armor nails at least. The method for preparing the armor nail roller sleeve is used for preparing the armor nail roller sleeve. The invention can be used for crushing and grinding materials such as ores, gravels, limestone and the like, is beneficial to reducing the maintenance frequency of equipment, keeps the continuous production, and has the service life more than doubled compared with the service life of the conventional nail-embedded roller sleeve (or cast nail roller sleeve).
Description
Technical Field
The invention belongs to the technical field of wear-resistant equipment, and particularly relates to an armor nail roller sleeve and a preparation method thereof.
Background
The wear-resistant roller sleeve is an important component in devices such as a roller press, a vertical mill and the like, and the devices are commonly used for crushing and grinding operations in industries such as mine, cement, metallurgy and the like; in order to facilitate processing and maintenance, the roller generally consists of a roller sleeve and a mandrel, wherein the roller sleeve is sleeved outside the mandrel; taking a roller press as an example, a typical roller press is generally provided with two parallel rollers, and materials are crushed under the extrusion action of the rollers after entering a gap between the two rollers; in actual engineering, the pressure to be borne by the roller sleeve can reach as high as 300MPa, the roller sleeve can also generate severe friction with materials in the operation process, and in addition, the roller sleeve can also be impacted by the materials in the feeding process, so that the roller sleeve is extremely easy to damage and wear; in order to improve the structural performance of the roller sleeve, in the prior art, a cylindrical stud is generally arranged on the surface of the roller sleeve to protect the roller sleeve, so that the abrasion of the roller sleeve is slowed down by utilizing the abrasion resistance of the stud; however, the following problems still remain: on one hand, due to the fact that materials of the stud and the roller sleeve are inconsistent, the stud is prone to loosening after long-time use, on the other hand, the area ratio of the stud on the roller sleeve is small, the stud is exposed after the roller sleeve is abraded, the stud is prone to cracking and breaking, the service life of the roller sleeve is short, equipment needs to be maintained frequently, and production influence is large.
Disclosure of Invention
The invention aims to provide an armor nail roller sleeve and a preparation method thereof, and aims to solve the technical problems in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an armor nail roller shell, including wear-resisting roller shell body with be the armor nail of array distribution on the working face of wear-resisting roller shell body, the casting of armor nail inner is at wear-resisting roller shell body internally, and the outer end exposes outside the working face of wear-resisting roller shell body, and the armor nail is the column or the taper structure of personally submitting regular hexagon or equilateral hexagon in the cross section, has a set of side that is parallel to each other at least between the adjacent armor nail.
In one possible implementation manner, the wear-resistant roller sleeve body is of a tire-shaped structure, a conical structure or a cylindrical structure; the wear-resistant roller sleeve body is of a split structure, and the roller sleeve structure is formed by splicing a plurality of cast and molded blocks; the wear-resistant roller sleeve body comprises an embedded body and a plurality of prefabricated blocks, the prefabricated blocks are arranged on the embedded body along an annular array, the prefabricated blocks are of strip structures, at least one end of each prefabricated block is provided with a first anchoring claw, an armor nail is arranged on the outer side face of each prefabricated block, and the inner side face of each prefabricated block is provided with a second anchoring claw; the second anchoring claw is arranged along the length direction of the precast block, and the cross section of the second anchoring claw is gourd-shaped; the chimera is the structure that centrifugal casting formed.
In one possible implementation mode, the armor nails are of a cylindrical structure with a cross section of a regular hexagon or an equilateral hexagon, and the distance between the outer edges of the adjacent armor nails is 5-12 mm; the armor nail is of an integrally sintered, cast or forged alloy material structure; the diameter of an inscribed circle of the armor nail is 25 mm-33 mm, and the length is 25 mm-60 mm; the length of the armor nail extending out of the outer surface of the wear-resistant roller sleeve body is 3 mm-6 mm.
In one possible implementation mode, the wear-resistant roller sleeve body is of a structure formed by centrifugal casting, the depth of the outer layer of the wear-resistant roller sleeve body is more than 40mm, the hardness is HRC 55-65, and the hardness of the inner layer is HB 200-300; the outer layer material of the wear-resistant roller sleeve body comprises, by mass, 0.5-1.2% of carbon, 0.6-1.6% of manganese, 0.5-1.5% of nickel, 3-15% of chromium, 0.4-2.5% of molybdenum and the balance of iron; the inner layer material of the wear-resistant roller sleeve body comprises: 0.4-0.5% of carbon, 0.6-1.0% of manganese, 0.5-1.5% of nickel, 0.2-0.5% of chromium, 0.2-0.5% of molybdenum and the balance of iron.
In one possible implementation mode, the side surface of the middle part or the tail part of the armor nail is provided with an anchoring groove; the anchoring grooves are provided at least on a set of oppositely disposed sides of the armor nails.
In a possible implementation mode, the tail end of the armor nail is further provided with a tail hole and a communication hole, the tail hole is arranged along the axial direction of the armor nail, and the communication hole communicates the inside of the tail hole with the anchoring groove.
In one possible implementation mode, the wear-resistant roller sleeve body is of a double-layer structure formed by centrifugal pouring, the anchoring groove is located at the junction of the inner layer and the outer layer of the wear-resistant roller sleeve body, and the tail hole is located in the inner layer of the wear-resistant roller sleeve body; the armor nail roller sleeve further comprises a positioning sleeve, a fixing hole used for containing the end portion of an armor nail is formed in the positioning sleeve, the end portion of the fixing hole and the end portion of the armor nail are in interference fit through smearing a high-temperature fixing agent, a movable positioning protrusion is arranged at the position, located on the inner side of the positioning sleeve, of the armor nail, an inner ring of the positioning protrusion is clamped on the armor nail, one side of the inner ring of the positioning protrusion is used for abutting against the inner side of the positioning sleeve, the positioning protrusion is limited between the positioning sleeve and the armor nail, and after the positioning sleeve and the armor nail are firmly matched, the positioning protrusion is taken out.
In a possible implementation mode, the positioning sleeve is provided with anti-leakage alloy round nails in gaps among armor nails positioned at the edge of the wear-resistant roller sleeve body; the internal dimension of the tail hole is larger than the mouth dimension.
In order to achieve the purpose, the invention adopts the technical scheme that: the preparation method of the armor nail roller sleeve is used for preparing the armor nail roller sleeve and comprises the following steps:
A. preparing an armor nail, mixing fine powder of titanium carbide and tungsten carbide with a binder, pressing the mixture into an alloy nail blank in a grinding tool, and sintering the alloy nail blank to obtain the armor nail;
B. preparing a positioning sleeve, cutting a steel plate into a required rectangle or fan shape, punching or cutting a fixing hole, fixing an armor nail in the fixing hole, and curling the steel plate into a cylinder shape;
C. centrifugally pouring, namely installing the positioning sleeve fixed with the armor nails in a centrifugally cast metal mold, preheating the metal mold, then injecting outer-layer molten steel into the metal mold at the temperature of 1520-1560 ℃ to quickly wrap the armor nails, and injecting partial inner-layer molten steel at the temperature of 1520-1540 ℃ when the outer-layer molten steel is in a semi-solidified state; and when the injected inner layer molten steel is in a semi-solidified state, injecting the residual inner layer molten steel at the temperature of 1520-1540 ℃ again. When the inner layer is solidified and the temperature is about 800 ℃, taking the workpiece out of the metal mold, and transferring to a heat treatment furnace for refined grain annealing;
D. refining crystal grains, annealing, namely loading the centrifugally cast workpiece into a heat treatment furnace, slowly heating to 850-870 ℃, preserving heat for 10-20 hours, cooling to 250 ℃ along with the furnace, discharging and air cooling;
E. roughly processing the annealed workpiece, and reserving 5mm of allowance on an inner hole and two end faces;
F. and finally, carrying out heat treatment, removing the fixed sleeve, putting the workpiece into a heat treatment furnace, slowly heating to 930-1030 ℃, preserving the heat for 10-15 hours, cooling to below 50 ℃ by air, tempering at 220-480 ℃, cooling to below 150 ℃ along with the furnace, and discharging.
G. And (5) processing according to the requirements of a drawing for finish machining.
In one possible implementation manner, in the step a, the armor nail comprises 50-60% by mass of titanium carbide and 3-10% by mass of tungsten carbide, and the balance is a binder, or comprises 65-70% by mass of tungsten carbide or 5-10% by mass of titanium carbide, and the balance is a binder; the binder is a mixture of iron, nickel, molybdenum, cobalt and manganese, and the mixture ratio is as follows by mass: 5-13% of iron, 2-12% of nickel, 0-2% of cobalt, 0-3% of molybdenum, 2-3% of manganese and the balance of iron; the outer layer molten steel comprises 0.5-1.2% of carbon, 0.6-1.6% of manganese, 0.5-1.5% of nickel, 3-15% of chromium, 0.4-2.5% of molybdenum and the balance of iron by mass; the inner layer molten steel comprises, by mass, 0.4-0.5% of carbon, 0.6-1.0% of manganese, 0.5-1.5% of nickel, 0.2-0.5% of chromium, 0.2-0.5% of molybdenum, and the balance of iron.
The armor nail roller sleeve provided by the invention has the beneficial effects that: compared with the prior art, the roller sleeve has the advantages that the armor nails with cross sections in the regular hexagon or equilateral hexagon columnar or taper structure are arranged, and at least one group of side faces which are parallel to each other is arranged between the adjacent armor nails, so that the armor nails are orderly arranged into the armor-shaped structure, the distance between each armor nail is equal, the area ratio of the armor nail to the working face of the roller sleeve is larger than 50%, the abrasion of the roller sleeve body can be reduced compared with the traditional round armor nails, the abrasion of the roller sleeve body is more uniform, the possibility of looseness of the armor nails is reduced, and the service life of the roller sleeve is prolonged; simultaneously, the corners of the armor nails in the regular hexagon or the equilateral hexagon are all 120 degrees, and part of the side edges can not be in vertical contact with materials, so that the possibility of the corner breakage of the armor nails caused by collision is greatly reduced, the service life of the roller sleeve is prolonged, the maintenance frequency of equipment is reduced, and the continuous production is facilitated. The invention can be used for crushing and grinding materials such as ores, gravels, limestone and the like, and the service life of the invention is prolonged by more than two times compared with the conventional nail-embedded roller sleeve (or cast nail roller sleeve).
The preparation method of the armor nail roller sleeve has the beneficial effects that: compared with the prior art, the method can conveniently realize the preparation of the armor nail roller sleeve, and the prepared armor nail roller sleeve has longer service life.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic side view of a first armor nail roll cover (tire shape) according to an embodiment of the invention;
FIG. 2 is a schematic side cross-sectional view of a first armor nail roll cover (green shape) according to an embodiment of the present invention;
FIG. 3 is a schematic sectional view from above of a first armor nail roll cover (tire shape) according to an embodiment of the present invention;
FIG. 4 is a schematic side cross-sectional view of a second armor nail roll cover (cone) according to an embodiment of the present invention;
FIG. 5 is a schematic side cross-sectional view of a third armor nail roller sleeve preform block provided in accordance with an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a third armor nail roller sleeve (tire shape) preform block in front view according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a middle cross-sectional direction structure of a prefabricated block of a third armor nail roller sleeve (tire shape) provided by an embodiment of the invention;
FIG. 8 is a schematic diagram of a locating sleeve portion of a fourth armor nail roller sleeve (green shape) according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a fifth armor pin roll cover showing a positioning sleeve deployment structure according to an embodiment of the present invention;
FIG. 10 is a schematic side cross-sectional view of a sixth armor nail roll cover according to an embodiment of the present disclosure;
fig. 11 is a schematic side view of an armor nail of a seventh armor nail roller sleeve according to an embodiment of the present invention;
fig. 12 is a schematic top view of an armor nail of a seventh armor nail roller sleeve according to an embodiment of the present invention;
fig. 13 is a schematic side cross-sectional structural view of an armor nail of an eighth armor nail roller sleeve according to an embodiment of the invention.
Wherein the reference numerals in the figures are as follows:
10. an armor nail; 11. an anchoring groove; 12. a tail hole; 13. a communicating hole; 14. positioning the projection;
20. a positioning sleeve; 21. a fixing hole; 22. a stress release hole;
30. a wear-resistant roller shell body; 31. chimera; 32. prefabricating blocks;
33. a first anchoring claw; 34. a second anchoring claw.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The armor nail roller sleeve and the preparation method thereof provided by the invention are explained.
Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 10 together, an armor nail roller according to a first embodiment of the present invention includes a wear-resistant roller 30 and armor nails 10 distributed on a working surface of the wear-resistant roller 30 in an array, inner ends of the armor nails 10 are cast in the wear-resistant roller 30, outer ends of the armor nails are exposed outside the working surface of the wear-resistant roller 30, the armor nails 10 are cylindrical or tapered structures having a cross section of a regular hexagon or an equilateral hexagon, and at least one group of parallel side surfaces is provided between adjacent armor nails 10.
The number of the armor nails 10 on the wear-resistant roller sleeve body 30 is determined according to the size of the roller sleeve, the roller sleeve with a small diameter (less than 1200mm) adopts the armor nails 10 with small sections, and the distance is smaller; the large-diameter roller sleeve (larger than or equal to 1200mm) adopts the armor nails 10 with large cross sections, and the distance is large so as to avoid the looseness of the armor nails 10 in use caused by poor anchoring capability.
Compared with the prior art, the armor nail roller sleeve provided by the embodiment has the advantages that the armor nails 10 with cross sections in the regular hexagon or equilateral hexagon cylindrical or conical structure are arranged, and at least one group of parallel side faces are arranged between the adjacent armor nails 10, so that the armor nails 10 are orderly arranged into the armor-shaped structure, the distance between each armor nail 10 can be equal, the area ratio of the armor nail 10 to the roller sleeve working face can be larger than 50%, compared with the traditional round armor nail 10, the abrasion of the wear-resistant roller sleeve body 30 can be reduced, the abrasion of the wear-resistant roller sleeve body 30 is more uniform, the possibility of looseness of the armor nails 10 is reduced, and the service life of the roller sleeve is prolonged; simultaneously regular hexagon or equilateral hexagon's armor nail 10's angle all is 120, and partial side can not contact with the material is perpendicular for the possibility greatly reduced that armor nail 10 corner is burst apart by the collision also is favorable to promoting the life of roller shell, reduces the maintenance frequency of equipment, is favorable to going on continuously of production. The invention can be used for crushing and grinding materials such as ores, gravels, limestone and the like, and the service life of the invention is prolonged by more than two times compared with the conventional nail-embedded roller sleeve or nail-cast roller sleeve.
Referring to fig. 4 to fig. 7, a first embodiment of the present invention is further provided as follows:
the wear-resistant roller sleeve body 30 is of a split structure, and is spliced into a roller sleeve structure through a plurality of cast blocks.
Specifically, the wear-resistant roller sleeve body 30 comprises an embedded body 31 and a plurality of prefabricated blocks 32, the prefabricated blocks 32 are arranged on the embedded body 31 along an annular array, the prefabricated blocks 32 are of strip-shaped structures, at least one end of each prefabricated block is provided with a first anchoring claw 33, the armor nails 10 are arranged on the outer side surfaces of the prefabricated blocks 32, and the inner side surfaces of the prefabricated blocks 32 are provided with second anchoring claws 34; the second anchoring claw 34 is arranged along the length direction of the precast block 32, and the cross section of the second anchoring claw is gourd-shaped; the chimera 31 is a structure formed by centrifugal casting.
Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 10, a first embodiment of the present invention is further provided as follows:
the wear-resistant roller sleeve body 30 is of a tire-shaped structure, a conical structure or a cylindrical structure.
The armor nails 10 are in a cylindrical structure with a cross section of a regular hexagon or an equilateral hexagon, and the distance between the outer edges of the adjacent armor nails 10 is 5 mm-12 mm; the armor nail 10 is of an integrally sintered, cast or forged alloy material structure; the diameter of an inscribed circle of the armor nail 10 is 25 mm-33 mm, and the length is 25 mm-45 mm; the length of the armor nail 10 extending out of the outer surface of the wear-resistant roller sleeve body 30 is 3 mm-6 mm.
The wear-resistant roller sleeve body 30 is a structure formed by centrifugal casting, the depth of the outer layer of the wear-resistant roller sleeve body 30 is more than 40mm, the hardness is HRC 55-65, and the hardness of the inner layer is HB 200-300; the outer layer material of the wear-resistant roller sleeve body 30 comprises 0.5-1.2% of carbon, 0.6-1.6% of manganese, 0.5-1.5% of nickel, 3-15% of chromium, 0.4-2.5% of molybdenum and the balance of iron by mass; the inner layer material of the wear-resistant roller sleeve body 30 comprises: 0.4-0.5% of carbon, 0.6-1.0% of manganese, 0.5-1.5% of nickel, 0.2-0.5% of chromium, 0.2-0.5% of molybdenum and the balance of iron.
Referring to fig. 11 to fig. 13, a first embodiment of the present invention is further provided as follows:
an anchoring groove 11 is formed in the middle of the armor nail 10 or on the side face of the tail of the armor nail 10, and the tail of the armor nail 10 is one end of the armor nail 10 embedded in the roller sleeve; the anchoring grooves 11 are provided at least on a set of oppositely disposed sides of the armor nail 10. The arrangement of the anchoring grooves 11 can increase the contact area of the armor nails 10 and the wear-resistant roller sleeve body 30, and enhance the anchoring property.
Referring to fig. 13, a first embodiment of the present invention is as follows:
the tail end of the armor nail 10 is also provided with a tail hole 12 and a communication hole 13, the tail hole 12 is arranged along the axial direction of the armor nail 10, and the communication hole 13 communicates the inside of the tail hole 12 with the anchoring groove 11. The tail hole 12 is matched with the communicating hole 13, so that the tail hole 12 and the communicating hole 13 can be fully filled with molten steel to be matched, and meanwhile, the anchoring performance is improved.
Because the heat can be partially absorbed by the armor nails 10 after the molten steel enters the tail hole 12, the effect of melting the boundary is reduced, the inner size of the tail hole 12 is larger than the size of the mouth, the thickness of the tail hole 12 can be made to be larger, and meanwhile, the bonding strength is higher.
The wear-resistant roller sleeve body 30 is of a double-layer structure formed by centrifugal casting, the anchoring groove 11 is located at the junction of the inner layer and the outer layer of the wear-resistant roller sleeve body 30, and the tail hole 12 is located in the inner layer of the wear-resistant roller sleeve body 30; the armor nail roller sleeve further comprises a positioning sleeve 20, a fixing hole 21 used for containing the end portion of the armor nail 10 is formed in the positioning sleeve 20, the end portion of the armor nail 10 and the fixing hole 21 are in interference fit through smearing high-temperature fixing agents, the position, located on the inner side of the positioning sleeve 20, of the armor nail 10 is provided with a movable positioning protrusion 14, the inner ring of the positioning protrusion 14 is clamped on the armor nail 10, one side of the inner ring of the positioning protrusion is used for abutting against the inner side of the positioning sleeve 20, limiting is carried out between the positioning sleeve 20 and the armor nail 10, and the positioning protrusion 14 is taken out after the positioning sleeve 20 is stably matched with the armor nail 10.
Referring to fig. 9, a first embodiment of the present invention is as follows:
the space between the armor nails 10 at the edge of the wear-resistant roller sleeve body 30 of the positioning sleeve 20 is provided with the anti-leakage alloy round nails, the positioning sleeve 20 is provided with the stress release holes 22 corresponding to the anti-leakage alloy round nails, the anti-leakage alloy round nails are inserted in the stress release holes 22, and the stress release holes 22 are used for releasing stress in the centrifugal casting process, so that the phenomenon that the edge of the fixing plate body 20 generates stress concentration due to uneven area and further deforms is avoided.
Further, a method for manufacturing an armor nail roller cover according to a second embodiment of the present invention is used for manufacturing the above armor nail roller cover, and includes the following steps:
A. preparing an armor nail 10, mixing fine powder of titanium carbide and tungsten carbide with a binder, pressing the mixture into an alloy nail blank in a grinding tool, and sintering the alloy nail blank into the armor nail 10;
B. preparing a positioning sleeve 20, cutting a steel plate into a required rectangle or sector, punching or cutting a fixing hole 21, fixing the armor nail 10 in the fixing hole 21, and curling the steel plate into a cylinder shape;
C. centrifugally pouring, namely installing the positioning sleeve after the armor nail 10 is fixed in a centrifugally cast metal mold, preheating the metal mold, then injecting outer-layer molten steel into the metal mold at the temperature of 1520-1560 ℃ so as to quickly wrap the armor nail 10, and injecting partial inner-layer molten steel at the temperature of 1520-1540 ℃ when the outer-layer molten steel is in a semi-solidified state; and when the injected inner layer molten steel is in a semi-solidified state, injecting the residual inner layer molten steel at the temperature of 1520-1540 ℃ again. When the inner layer is solidified and the temperature is about 800 ℃, taking the workpiece out of the metal mold, and transferring to a heat treatment furnace for refined grain annealing;
D. refining crystal grains, annealing, namely loading the centrifugally cast workpiece into a heat treatment furnace, slowly heating to 850-870 ℃, preserving heat for 10-20 hours, cooling to 250 ℃ along with the furnace, discharging and air cooling;
E. roughly processing the annealed workpiece, and reserving 5mm allowance on an inner hole and two end faces;
F. and finally, carrying out heat treatment, namely removing the fixing sleeve 20, putting the workpiece into a heat treatment furnace, slowly heating to 930-1030 ℃, preserving the heat for 10-15 hours, cooling the workpiece to below 50 ℃ by air, tempering the workpiece at 220-480 ℃, cooling the workpiece to below 150 ℃ along with the furnace, and discharging the workpiece from the furnace.
G. And (5) processing according to the requirements of a drawing for finish machining.
In the step A, the armor nail 10 comprises 50-60% by mass of titanium carbide and 3-10% by mass of tungsten carbide, and the balance is a binder, or comprises 65-70% by mass of tungsten carbide or 5-10% by mass of titanium carbide, and the balance is a binder; the binder is a mixture of iron, nickel, molybdenum, cobalt and manganese, and the mixture ratio is as follows by mass: 5-13% of iron, 2-12% of nickel, 0-2% of cobalt, 0-3% of molybdenum, 2-3% of manganese and the balance of iron; the outer layer molten steel comprises 0.5-1.2% of carbon, 0.6-1.6% of manganese, 0.5-1.5% of nickel, 3-15% of chromium, 0.4-2.5% of molybdenum and the balance of iron by mass; the inner layer molten steel comprises, by mass, 0.4-0.5% of carbon, 0.6-1.0% of manganese, 0.5-1.5% of nickel, 0.2-0.5% of chromium, 0.2-0.5% of molybdenum, and the balance of iron.
Compared with the prior art, the method for preparing the armor nail roller sleeve can conveniently realize the preparation of the armor nail roller sleeve, and the prepared armor nail roller sleeve is longer in service life.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an armour nail roller shell, its characterized in that includes wear-resisting roller shell body (30) and is array distribution armour nail (10) on the working face of wear-resisting roller shell body (30), armour nail (10) inner casting is in wear-resisting roller shell body (30), and the outer end exposes the working face of wear-resisting roller shell body (30) outside, armour nail (10) are the column or the taper structure of personally submitting regular hexagon or equilateral hexagon for the cross section, adjacent at least have a set of side that is parallel to each other between armour nail (10).
2. The armor nail roller cover of claim 1, wherein: the wear-resistant roller sleeve body (30) is of a tire-shaped structure, a conical structure or a cylindrical structure; the wear-resistant roller sleeve body (30) is of a composite structure, and is spliced into a roller sleeve structure through a plurality of cast blocks; the wear-resistant roller sleeve body (30) comprises an embedded body (31) and a plurality of prefabricated blocks (32), the prefabricated blocks (32) are arranged on the embedded body (31) along an annular array, the prefabricated blocks (32) are of strip-shaped structures, at least one end of each prefabricated block is provided with a first anchoring claw (33), armor nails (10) are arranged on the outer side surfaces of the prefabricated blocks (32), and the inner side surfaces of the prefabricated blocks (32) are provided with second anchoring claws (34); the second anchoring claw (34) is arranged along the length direction of the precast block (32), and the cross section of the second anchoring claw is gourd-shaped; the structure is formed by centrifugally pouring the chimera (31).
3. The armor nail roller cover of claim 1, wherein: the armor nails (10) are of a cylindrical structure with a cross section being a regular hexagon or an equilateral hexagon, and the distance between the outer edges of the adjacent armor nails (10) is 5-12 mm; the armor nail (10) is of an integrally sintered alloy material structure; the diameter of an inscribed circle of the armor nail (10) is 25 mm-33 mm, and the length is 25 mm-60 mm; the length of the armor nail (10) extending out of the outer surface of the wear-resistant roller sleeve body (30) is 3-6 mm.
4. The armor nail roller cover of claim 1, wherein: the wear-resistant roller sleeve body (30) is of a structure formed by centrifugal casting, the depth of the outer layer of the wear-resistant roller sleeve body (30) is more than 40mm, the hardness is HRC 55-65, and the hardness of the inner layer is HB 200-300; the outer layer material of the wear-resistant roller sleeve body (30) comprises 0.5-1.2% of carbon, 0.6-1.6% of manganese, 0.5-1.5% of nickel, 3-15% of chromium, 0.4-2.5% of molybdenum and the balance of iron by mass; the inner layer material of the wear-resistant roller sleeve body (30) comprises: 0.4-0.5% of carbon, 0.6-1.0% of manganese, 0.5-1.5% of nickel, 0.2-0.5% of chromium, 0.2-0.5% of molybdenum and the balance of iron.
5. An armor nail roller cover according to claim 1 or 4, wherein: an anchoring groove (11) is formed in the middle of the armor nail (10) or on the side face of the tail of the armor nail; the anchoring grooves (11) are provided at least on a set of oppositely disposed sides of the armor nails (10).
6. The armor nail roller cover of claim 5, wherein: the tail end of the armor nail (10) is further provided with a tail hole (12) and a communication hole (13), the tail hole (12) is arranged along the axial direction of the armor nail (10), and the communication hole (13) is used for communicating the inside of the tail hole (12) with the anchoring groove (11); the internal dimension of the tail hole (12) is larger than the mouth dimension.
7. The armor nail roller cover of claim 6, wherein: the wear-resistant roller sleeve body (30) is of a double-layer structure formed by centrifugal casting, the anchoring groove (11) is located at the junction of the inner layer and the outer layer of the wear-resistant roller sleeve body (30), and the tail hole (12) is located in the inner layer of the wear-resistant roller sleeve body (30); the armour nail roller sleeve still includes position sleeve (20), be equipped with on position sleeve (20) and be used for holding fixed orifices (21) of armour nail (10) tip, fixed orifices (21) with the tip of armour nail (10) realizes interference fit through paining high temperature fixing agent, armour nail (10) are located the position of position sleeve (20) inboard is equipped with the protruding (14) in location of activity, protruding (14) inner circle card in location is used for supporting on armour nail (10) and one side the position sleeve (20) inboard to carry on spacingly between position sleeve (20) and armour nail (10), after position sleeve (20) and armour nail (10) firm cooperation, take out protruding (14) in location.
8. The armor nail roller cover of claim 7, wherein: and the positioning sleeve (20) is provided with anti-leakage alloy round nails in gaps among the armor nails (10) at the edge of the wear-resistant roller sleeve body (30).
9. A method for preparing an armor nail roller cover, which is used for preparing the armor nail roller cover of any one of claims 1-8, and comprises the following steps:
A. preparing an armor nail (10), mixing fine powder of titanium carbide and tungsten carbide with a binder, pressing the mixture into an alloy nail blank in a grinding tool, and sintering the alloy nail blank into the armor nail (10);
B. preparing a positioning sleeve (20), cutting a steel plate into a required rectangle or fan shape, punching or cutting a fixing hole (21), fixing an armor nail (10) in the fixing hole (21), and curling the steel plate into a cylinder shape;
C. centrifugally pouring, namely installing the positioning sleeve after the armor nail (10) is fixed in a centrifugally cast metal mold, preheating the metal mold, then injecting the outer-layer molten steel into the metal mold at the temperature of 1520-1560 ℃ so as to quickly wrap the armor nail (10), and injecting partial inner-layer molten steel at the temperature of 1520-1540 ℃ when the outer-layer molten steel is in a semi-solidified state; and when the injected inner layer molten steel is in a semi-solidified state, injecting the residual inner layer molten steel at the temperature of 1520-1540 ℃ again. When the inner layer is solidified and the temperature is about 800 ℃, taking the workpiece out of the metal mold, and transferring to a heat treatment furnace for refined grain annealing;
D. refining crystal grains, annealing, namely loading the centrifugally cast workpiece into a heat treatment furnace, slowly heating to 850-870 ℃, preserving heat for 10-20 hours, cooling to 250 ℃ along with the furnace, discharging and air cooling;
E. roughly processing the annealed workpiece, and reserving 5mm of allowance on an inner hole and two end faces;
F. and finally, carrying out heat treatment, namely removing the fixing sleeve (20), putting the workpiece into a heat treatment furnace, slowly heating to 930-1030 ℃, preserving the heat for 10-15 hours, cooling to below 50 ℃ by air, tempering at 220-480 ℃, cooling to below 150 ℃ along with the furnace, and discharging.
G. And (5) processing according to the requirements of a drawing for finish machining.
10. The method of making an armor nail sleeve of claim 9, wherein: in the step A, the armor nail (10) comprises 50-60% by mass of titanium carbide and 3-10% by mass of tungsten carbide, and the balance is a binder, or comprises 65-70% by mass of tungsten carbide or 5-10% by mass of titanium carbide, and the balance is a binder; the binder is a mixture of iron, nickel, molybdenum, cobalt and manganese, and the mixture ratio is as follows by mass: 5-13% of iron, 2-12% of nickel, 0-2% of cobalt, 0-3% of molybdenum, 2-3% of manganese and the balance of iron; the outer layer molten steel comprises, by mass, 0.5-1.2% of carbon, 0.6-1.6% of manganese, 0.5-1.5% of nickel, 3-15% of chromium, 0.4-2.5% of molybdenum and the balance of iron; the inner layer molten steel comprises, by mass, 0.4-0.5% of carbon, 0.6-1.0% of manganese, 0.5-1.5% of nickel, 0.2-0.5% of chromium, 0.2-0.5% of molybdenum and the balance of iron.
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Cited By (1)
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|---|---|---|---|---|
| CN115945259A (en) * | 2023-01-18 | 2023-04-11 | 东北大学 | Deep groove stress release bimetal composite roller sleeve and preparation method and application thereof |
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| CN114950636B (en) | 2024-04-26 |
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