CN114950636B - Armor nail roller sleeve and preparation method thereof - Google Patents
Armor nail roller sleeve and preparation method thereof Download PDFInfo
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- CN114950636B CN114950636B CN202210635574.0A CN202210635574A CN114950636B CN 114950636 B CN114950636 B CN 114950636B CN 202210635574 A CN202210635574 A CN 202210635574A CN 114950636 B CN114950636 B CN 114950636B
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- armor
- nail
- roller sleeve
- wear
- nails
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- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 15
- 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
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 238000004873 anchoring Methods 0.000 claims description 28
- 229910052742 iron Inorganic materials 0.000 claims description 21
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 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
- 238000010438 heat treatment Methods 0.000 claims description 16
- 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
- 210000000078 claw Anatomy 0.000 claims description 13
- 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
- 239000000956 alloy Substances 0.000 claims description 11
- 238000009750 centrifugal casting Methods 0.000 claims description 10
- 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
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 238000004891 communication 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
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 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
- 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
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims description 3
- 240000009087 Crescentia cujete Species 0.000 claims 1
- 235000005983 Crescentia cujete Nutrition 0.000 claims 1
- 235000009797 Lagenaria vulgaris Nutrition 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 235000019738 Limestone Nutrition 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract description 3
- 239000006028 limestone Substances 0.000 abstract description 3
- 239000004576 sand Substances 0.000 abstract description 3
- 239000004575 stone Substances 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 description 10
- 230000002035 prolonged effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000219122 Cucurbita Species 0.000 description 1
- 235000009852 Cucurbita pepo Nutrition 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- 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 which are distributed on the working surface of the wear-resistant roller sleeve body in an array mode, wherein 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 out of the working surface of the wear-resistant roller sleeve body, the armor nails are of columnar or conical structures with regular or equilateral hexagons in cross section, and at least one group of mutually parallel side surfaces are arranged between every two adjacent armor nails. The preparation method of the armor nail roller sleeve is used for preparing the armor nail roller sleeve. The invention can be used for crushing and grinding ores, sand stones, limestone and other materials, is beneficial to reducing the maintenance frequency of equipment, keeps continuous production, and prolongs the service life by more than two times compared with the conventional nail-inlaid 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 a roller press, a vertical mill and other devices, and the devices are commonly used for crushing and grinding operations in industries such as mines, cement, metallurgy and the like; in order to facilitate processing and maintenance, the roller is generally composed 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 after materials enter a gap between the two rollers, the materials are crushed under the extrusion action of the rollers; in practical engineering, the pressure to be born by the roller sleeve can be up to 300MPa, and the roller sleeve can also generate severe friction with materials in the working process, 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, the prior art generally arranges cylindrical studs on the surface of the roller sleeve to protect the roller sleeve so as to reduce the abrasion of the roller sleeve by utilizing the abrasion resistance of the studs; but there are also the following problems: on the one hand, because the materials of the stud and the roller sleeve are inconsistent, the stud is easy to loosen after long-time use, on the other hand, the area ratio of the stud on the roller sleeve is smaller, the stud is exposed after the roller sleeve is worn, and the stud is easy to crack and break, so that the service life of the roller sleeve is lower, the equipment needs frequent maintenance, and the production influence is larger.
Disclosure of Invention
The invention aims to provide an armor nail roller sleeve and a preparation method thereof, which are used for solving the technical problems in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme: the utility model provides an armor nail roller shell, including wear-resisting roller shell body and be the armor nail of array distribution on the working face of wear-resisting roller shell body, armor nail inner casting is in wear-resisting roller shell body, and the outer end exposes in the working face outside of wear-resisting roller shell body, and armor nail is the column or the taper structure that the transversal regular hexagon or equilateral hexagon that personally submits, has a set of side that is parallel to each other at least between the adjacent armor nail.
In one possible implementation, 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 is spliced into a roller sleeve structure through a plurality of cast blocks; the wear-resistant roller sleeve body comprises a jogged body and a plurality of precast blocks, the precast blocks are arranged on the jogged body along an annular array, the precast blocks are of a strip-shaped structure, at least one end of each precast block is provided with a first anchoring claw, armor nails are arranged on the outer side surfaces of the precast blocks, and the inner side surfaces of the precast blocks are provided with second anchoring claws; the second anchoring claw is arranged along the length direction of the precast block, and the cross section of the second anchoring claw is in a gourd shape; the jogged body is a structure formed by centrifugal casting.
In one possible implementation mode, the armor nails are of columnar structures with regular or equilateral hexagons in cross section, and the spacing between the outer edges of adjacent armor nails is 5-12 mm; the armor nail is an integrally sintered, cast or forged alloy material structure; the diameter of the 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 centrifugal casting structure, the depth of the outer layer of the wear-resistant roller sleeve body is greater than 40mm, the hardness of the outer layer is between HRC55 and 65, and the hardness of the inner layer is between HB200 and 300; the wear-resistant roll sleeve body outer layer material 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 wear-resistant roller sleeve body inner layer material comprises: 0.4 to 0.5 percent of carbon, 0.6 to 1.0 percent of manganese, 0.5 to 1.5 percent of nickel, 0.2 to 0.5 percent of chromium, 0.2 to 0.5 percent of molybdenum and the balance of iron.
In one possible implementation, 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 at least arranged on a group of side surfaces of the armor nails which are oppositely arranged.
In one possible implementation, the tail end of the armor nail is further provided with a tail hole and a communicating hole, the tail hole is arranged along the axial direction of the armor nail, and the communicating hole communicates the inside of the tail hole with the anchoring groove.
In one possible implementation manner, the wear-resistant roller sleeve body is of a double-layer structure formed by centrifugal casting, the anchoring groove is positioned at the junction of the inner layer and the outer layer of the wear-resistant roller sleeve body, and the tail hole is positioned at the inner layer of the wear-resistant roller sleeve body; the armor nail roller sleeve further comprises a positioning sleeve, a fixing hole for accommodating the end part of the armor nail is formed in the positioning sleeve, interference fit is achieved between the fixing hole and the end part of the armor nail through smearing of a high Wen Guchi agent, a movable positioning bulge is arranged at the inner side of the positioning sleeve, an inner ring of the positioning bulge is clamped on the armor nail and one side of the inner ring of the positioning bulge is used for propping against the inner side of the positioning sleeve, so that the positioning sleeve and the armor nail are limited, and after the positioning sleeve and the armor nail are firmly matched, the positioning bulge is taken out.
In one possible implementation mode, a round nail of anti-leakage alloy is arranged in a gap between armor nails of the edge of the wear-resistant roller sleeve body of the positioning sleeve; the interior dimension of the tail aperture is greater than the mouth dimension.
In order to achieve the above purpose, the invention adopts the following technical scheme: the preparation method of the armor nail roller sleeve is used for preparing the armor nail roller sleeve and comprises the following steps of:
A. preparing an armor nail, mixing fine powder of titanium carbide and tungsten carbide with a binder, pressing into an alloy nail blank in a grinding tool, and sintering to obtain the armor nail;
B. preparing a positioning sleeve, cutting a steel plate into a required rectangle or sector, punching or cutting a fixing hole, fixing an armor nail in the fixing hole, and curling the steel plate into a cylinder;
C. Centrifugally pouring, namely installing a locating sleeve after fixing armor nails in a centrifugally cast metal mold, preheating the metal mold, then injecting outer molten steel into the metal mold at 1520-1560 ℃ to rapidly wrap the armor nails, and injecting partial inner molten steel at 1520-1540 ℃ when the outer molten steel is in a semi-solidification state; when the injected inner layer molten steel is in a semi-solidification state, the residual inner layer molten steel with the temperature of 1520-1540 ℃ is injected again. When the inner layer is solidified and the temperature is about 800 ℃, taking the workpiece out of the metal mold, and carrying out refined grain annealing by transferring to a heat treatment furnace;
D. Fine grain annealing, 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. rough machining is carried out on the annealed workpiece, and a 5mm allowance is reserved on an inner hole and two end faces;
F. Finally, heat treatment is carried out, the fixed sleeve is removed, the workpiece is put into a heat treatment furnace, the temperature is slowly raised to 930-1030 ℃ for heat preservation for 10-15 hours, air cooling is carried out to below 50 ℃, tempering is carried out after 220-480 ℃, cooling is carried out with the furnace to below 150 ℃, and the workpiece is discharged.
G. and (5) carrying out finish machining according to the drawing requirements.
In one possible implementation, in the step A, the armor nail comprises 50-60% of titanium carbide and 3-10% of tungsten carbide by mass, the balance being binder, or comprises 65-70% of tungsten carbide or 5-10% of titanium carbide by mass, the balance being binder; the binder is a mixture of iron, nickel, molybdenum, cobalt and manganese, and the proportion is as follows by mass: iron 5-13%, nickel 2-12%, cobalt 0-2%, molybdenum 0-3%, manganese 2-3%, and the balance iron; the outer molten steel comprises 0.5 to 1.2 percent of carbon, 0.6 to 1.6 percent of manganese, 0.5 to 1.5 percent of nickel, 3 to 15 percent of chromium, 0.4 to 2.5 percent 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 invention has the advantages that the armor nails with the cross sections of regular hexagon or equilateral hexagon columnar or conical structures are arranged, and at least one group of mutually parallel side surfaces are arranged between the adjacent armor nails, so that the armor nails are orderly arranged into an armor-shaped structure, the spacing between each armor nail is equal, the area ratio of the armor nail to the working surface of the roller sleeve can be more than 50 percent, compared with the traditional round armor nail, the abrasion of the abrasion-resistant roller sleeve body can be reduced, the abrasion of the abrasion-resistant roller sleeve body is more uniform, the loosening possibility of the armor nails is reduced, and the service life of the roller sleeve is prolonged; meanwhile, the angles of the regular hexagonal or equilateral hexagonal armor nails are 120 degrees, and part of side edges can not be in vertical contact with materials, so that the possibility that the armor nail corners are crashed and cracked 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 ores, sand stones, limestone and other materials, and the service life of the invention is prolonged by more than twice than that of the conventional nail-inlaid roller sleeve (or cast nail roller sleeve).
The preparation method of the armor nail roller sleeve provided by the invention has the beneficial effects that: compared with the prior art, the preparation 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 of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic side view of a first armor nail roller sleeve (tire-shaped) according to an embodiment of the present invention;
fig. 2 is a schematic side sectional structure view of a first armor nail roller sleeve (tire shape) according to an embodiment of the present invention;
fig. 3 is a schematic top cross-sectional view of a first armor nail roller sleeve (tire-shaped) according to an embodiment of the present invention;
fig. 4 is a schematic side sectional structure view of a second armor nail roller sleeve (cone) according to an embodiment of the present invention;
fig. 5 is a schematic side sectional structure of a prefabricated block of a third armor nail roller sleeve (tire shape) provided in an embodiment of the present invention;
Fig. 6 is a schematic diagram of a front view of a prefabricated block of a third armor nail roller sleeve (tire shape) according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a cross-sectional direction structure of a middle part of a precast block of a third armor nail roller sleeve (tire shape) provided by an embodiment of the present invention;
Fig. 8 is a schematic structural view of a positioning sleeve part of a fourth armor nail roll sleeve (tire shape) provided in an embodiment of the present invention;
fig. 9 is a schematic view of a positioning sleeve unfolding structure of a fifth armor nail roller sleeve according to an embodiment of the present invention;
fig. 10 is a schematic side sectional structure view of a sixth armor nail roller sleeve provided by an embodiment of the present invention;
fig. 11 is a schematic side view of an armor nail of a seventh armor nail roll 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 roll sleeve according to an embodiment of the present invention;
fig. 13 is a schematic side sectional view of an armor nail of an eighth armor nail roll sleeve according to an embodiment of the present invention.
Wherein, each reference sign is as follows in the figure:
10. armor nails; 11. an anchor groove; 12. tail holes; 13. a communication hole; 14. positioning the bulge;
20. A positioning sleeve; 21. a fixing hole; 22. a stress relief hole;
30. A wear-resistant roller sleeve body; 31. a chimeric body; 32. precast blocks;
33. A first anchoring claw; 34. and a second anchoring claw.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the 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 for purposes of illustration only and are not intended to limit the scope of the invention.
The armor nail roller sleeve and the preparation method thereof provided by the invention are now described.
Referring to fig. 1,2, 3,4 and 10, the armor nail roller sleeve provided by the first embodiment of the present invention includes a wear-resistant roller sleeve body 30 and armor nails 10 distributed on a working surface of the wear-resistant roller sleeve body 30 in an array, wherein inner ends of the armor nails 10 are cast in the wear-resistant roller sleeve body 30, outer ends of the armor nails are exposed out of the working surface of the wear-resistant roller sleeve body 30, the armor nails 10 are in a columnar or conical structure with a regular hexagon or an equilateral hexagon cross section, and at least one group of mutually parallel side surfaces are arranged between adjacent armor nails 10.
The number of the armor nails 10 on the wear-resistant roll sleeve body 30 is determined according to the size of the roll sleeve, the roll sleeve with small diameter (less than 1200 mm) adopts armor nails 10 with small section, and the interval is smaller; the large-diameter roller sleeve (more than or equal to 1200 mm) adopts armor nails 10 with large cross sections, and the spacing is large, so that the problem that the armor nails 10 are loose in use due to poor anchoring capability is avoided.
Compared with the prior art, the armor nail roller sleeve provided by the embodiment has the advantages that the armor nails 10 with the cross sections of regular hexagon or equilateral hexagon columnar or conical structures are arranged, at least one group of mutually parallel side surfaces are arranged between the adjacent armor nails 10, so that the armor nails 10 are orderly arranged into the armor-shaped structure, the spacing between each armor nail 10 can be equal, the area ratio of each armor nail 10 to the working surface of the roller sleeve can be more than 50%, compared with the traditional circular armor nails 10, the abrasion of the abrasion-resistant roller sleeve body 30 can be reduced, the abrasion of the abrasion-resistant roller sleeve body 30 is more uniform, the possibility of loosening the armor nails 10 is reduced, and the service life of the roller sleeve is prolonged; meanwhile, the corners of the regular hexagonal or equilateral hexagonal armor nails 10 are 120 degrees, and part of side edges can not be in vertical contact with materials, so that the possibility that the corners of the armor nails 10 are broken 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 of production is facilitated. The invention can be used for crushing and grinding ore, sand stone, limestone and other materials, and the service life of the invention is prolonged by more than twice than that of the conventional nail-inlaid roll sleeve or cast nail roll sleeve.
Referring to fig. 4 to 7, another embodiment of the present invention based on the first embodiment is as follows:
The wear-resistant roll sleeve body 30 is of a split structure, and is spliced into a roll sleeve structure through a plurality of cast and formed split blocks.
Specifically, the wear-resistant roller sleeve body 30 comprises a jogged body 31 and a plurality of precast blocks 32, the precast blocks 32 are arranged on the jogged body 31 along an annular array, the precast blocks 32 are in a strip-shaped structure, at least one end of each precast block is provided with a first anchoring claw 33, the armor nail 10 is arranged on the outer side surface of each precast block 32, and the inner side surface of each precast block 32 is provided with a second anchoring claw 34; the second anchoring claws 34 are arranged along the length direction of the precast block 32 and have a gourd-shaped cross section; the fitting body 31 is formed by centrifugal casting.
Referring to fig. 1,2,3, 4 and 10, a specific embodiment of the present invention based on the first embodiment is as follows:
the wear-resistant roll sleeve body 30 is of a tire-shaped structure, a conical structure or a cylindrical structure.
The armor nails 10 are columnar structures with regular or equilateral hexagons in cross section, and the spacing between the outer edges of adjacent armor nails 10 is 5-12 mm; the armor nail 10 is an integrally sintered, cast or forged alloy material structure; the diameter of the 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 roll sleeve body 30 is 3 mm-6 mm.
The wear-resistant roller sleeve body 30 is of a centrifugal casting structure, the depth of the outer layer of the wear-resistant roller sleeve body 30 is more than 40mm, the hardness of the outer layer is HRC 55-65, and the hardness of the inner layer is HB 200-300; the outer layer material of the wear-resistant roll sleeve body 30 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 30 comprises: 0.4 to 0.5 percent of carbon, 0.6 to 1.0 percent of manganese, 0.5 to 1.5 percent of nickel, 0.2 to 0.5 percent of chromium, 0.2 to 0.5 percent of molybdenum and the balance of iron.
Referring to fig. 11 to 13, another embodiment of the present invention based on the first embodiment is as follows:
The middle part or the side surface of the tail part of the armor nail 10 is provided with an anchoring groove 11, and the tail part of the armor nail 10 is one end of the armor nail 10 buried 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 anchor grooves 11 can increase the contact area between the armor nail 10 and the wear-resistant roll sleeve body 30, so that the anchoring property is enhanced.
Referring to fig. 13, a specific embodiment of the present invention based on the first embodiment 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 is used for communicating the inside of the tail hole 12 with the anchoring groove 11. The tail hole 12 is matched with the communication hole 13, so that molten steel can fully fill the tail hole 12 and the communication hole 13 to be matched, and the anchoring performance is improved.
Since the heat is partially absorbed by the armor nail 10 after the molten steel enters the tail hole 12, the effect of melting the boundary is reduced, and therefore, the internal dimension of the tail hole 12 is larger than the mouth dimension, the thickness of the tail hole 12 can be increased, and the bonding strength is also increased.
The wear-resistant roller sleeve body 30 is of a double-layer structure formed by centrifugal casting, the anchoring groove 11 is positioned 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 positioned at 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 for accommodating the end part of the armor nail 10 is formed in the positioning sleeve 20, interference fit is achieved between the fixing hole 21 and the end part of the armor nail 10 through smearing a high Wen Guchi agent, a movable positioning protrusion 14 is arranged at the position, located on the inner side of the positioning sleeve 20, of the armor nail 10, the inner ring of the positioning protrusion 14 is clamped on the armor nail 10, one side of the positioning protrusion is used for propping against the inner side of the positioning sleeve 20, limiting is conducted between the positioning sleeve 20 and the armor nail 10, and after the positioning sleeve 20 and the armor nail 10 are firmly matched, the positioning protrusion 14 is taken out.
Referring to fig. 9, a specific embodiment of the present invention based on the first embodiment is as follows:
The locating sleeve 20 is provided with leakage-proof alloy round nails in gaps among the armor nails 10 at the edge of the wear-resistant roll sleeve body 30, the locating sleeve 20 is provided with stress release holes 22 corresponding to the leakage-proof alloy round nails, the leakage-proof alloy round nails are inserted into the stress release holes 22, the stress release holes 22 are used for releasing stress in the centrifugal casting process, and stress concentration and deformation of the edge of the fixing plate body 20 due to uneven areas are avoided.
Further, the preparation method of the armor nail roller sleeve provided by the second embodiment of the invention is used for preparing the armor nail roller sleeve and comprises the following steps:
A. Preparing an armor nail 10, mixing fine powder of titanium carbide and tungsten carbide with a binder, pressing into an alloy nail blank in a grinding tool, and sintering to obtain 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;
C. Centrifugally pouring, namely installing a locating sleeve after fixing the armor nails 10 in a centrifugally cast metal mold, preheating the metal mold, then injecting outer molten steel into the metal mold at 1520-1560 ℃ to rapidly wrap the armor nails 10, and injecting partial inner molten steel at 1520-1540 ℃ when the outer molten steel is in a semi-solidification state; when the injected inner layer molten steel is in a semi-solidification state, the residual inner layer molten steel with the temperature of 1520-1540 ℃ is injected again. When the inner layer is solidified and the temperature is about 800 ℃, taking the workpiece out of the metal mold, and carrying out refined grain annealing by transferring to a heat treatment furnace;
D. Fine grain annealing, 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. rough machining is carried out on the annealed workpiece, and a 5mm allowance is reserved on an inner hole and two end faces;
F. Finally, heat treatment is carried out, the fixed sleeve 20 is removed, the workpiece is put into a heat treatment furnace, the temperature is slowly raised to 930-1030 ℃ for heat preservation for 10-15 hours, air cooling is carried out to below 50 ℃, tempering is carried out after 220-480 ℃, cooling is carried out with the furnace to below 150 ℃, and the workpiece is discharged.
G. and (5) carrying out finish machining according to the drawing requirements.
In the step A, the armor nail 10 comprises 50-60% of titanium carbide and 3-10% of tungsten carbide by mass, and the balance of binder, or comprises 65-70% of tungsten carbide or 5-10% of titanium carbide by mass, and the balance of binder; the binder is a mixture of iron, nickel, molybdenum, cobalt and manganese, and the proportion is as follows by mass: iron 5-13%, nickel 2-12%, cobalt 0-2%, molybdenum 0-3%, manganese 2-3%, and the balance iron; the outer molten steel comprises 0.5 to 1.2 percent of carbon, 0.6 to 1.6 percent of manganese, 0.5 to 1.5 percent of nickel, 3 to 15 percent of chromium, 0.4 to 2.5 percent 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 preparation method of 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 foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The armor nail roller sleeve is characterized by comprising a wear-resistant roller sleeve body (30) and armor nails (10) distributed on the working surface of the wear-resistant roller sleeve body (30) in an array manner, wherein the inner ends of the armor nails (10) are cast in the wear-resistant roller sleeve body (30), the outer ends of the armor nails are exposed out of the working surface of the wear-resistant roller sleeve body (30), the armor nails (10) are of columnar or conical structures with regular or equilateral hexagons in cross section, and at least one group of mutually parallel side surfaces are arranged between every two adjacent armor nails (10);
An anchoring groove (11) is formed in the middle part or the side face of the tail part of the armor nail (10); the anchoring grooves (11) are at least arranged on a group of side surfaces of the armor nails (10) which are oppositely arranged;
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) is used for communicating the inside of the tail hole (12) with the anchoring groove (11); the inside dimension of the tail hole (12) is larger than the mouth dimension;
The wear-resistant roller sleeve body (30) is of a double-layer structure formed by centrifugal casting, the anchoring groove (11) is positioned 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 positioned at 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 accommodating the end part of the armor nail (10) is formed in the positioning sleeve (20), interference fit is achieved through coating a high Wen Guchi agent on the end part of the armor nail (10), the armor nail (10) is located at the inner side of the positioning sleeve (20) and is provided with a movable positioning bulge (14), an inner ring of the positioning bulge (14) is clamped on the armor nail (10) and one side of the positioning bulge is used for propping against the inner side of the positioning sleeve (20) so as to limit the space between the positioning sleeve (20) and the armor nail (10), and the positioning bulge (14) is taken out after the positioning sleeve (20) and the armor nail (10) are firmly matched.
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 a jogged body (31) and a plurality of precast blocks (32), the precast blocks (32) are arranged on the jogged body (31) along an annular array, the precast blocks (32) are of a strip-shaped structure, at least one end of each precast block is provided with a first anchoring claw (33), armor nails (10) are arranged on the outer side surfaces of the precast blocks (32), and the inner side surfaces of the precast 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 in a calabash shape; and the chimeric body (31) is formed by centrifugal casting.
3. The armor nail roller cover of claim 1, wherein: the armor nails (10) are of columnar structures with regular or equilateral hexagons in cross section, and the spacing between the outer edges of adjacent armor nails (10) is 5 mm-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 25-33 mm, and the length of the inscribed circle is 25-60 mm; the length of the armor nail (10) extending out of the outer surface of the wear-resistant roller sleeve body (30) is 3 mm-6 mm.
4. The armor nail roller cover of claim 1, wherein: the wear-resistant roller sleeve body (30) is of a centrifugal casting structure, the depth of the outer layer of the wear-resistant roller sleeve body (30) is larger than 40mm, the hardness of the outer layer is HRC 55-65, and the hardness of the inner layer is HB 200-300; the wear-resistant roll sleeve body (30) 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 (30) comprises: 0.4-0.5% by mass of carbon, 0.6-1.0% by mass of manganese, 0.5-1.5% by mass of nickel, 0.2-0.5% by mass of chromium, 0.2-0.5% by mass of molybdenum and the balance of iron.
5. The armor nail roller cover of claim 1, wherein: the locating sleeve (20) is positioned in a gap between armor nails (10) at the edge of the wear-resistant roll sleeve body (30), and leakage-proof alloy round nails are arranged in the gap.
6. A method for preparing the armor nail roller sleeve according to any one of claims 1 to 5, comprising the steps of:
A. Preparing an armor nail (10), mixing fine powder of titanium carbide and tungsten carbide with a binder, pressing into an alloy nail blank in a grinding tool, and sintering to obtain 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 a locating sleeve after fixing the armor nails (10) in a centrifugally cast metal mold, preheating the metal mold, then injecting outer molten steel into the metal mold at 1520-1560 ℃ to rapidly wrap the armor nails (10), and injecting partial inner molten steel at 1520-1540 ℃ when the outer molten steel is in a semi-solidification state; reinjecting the residual inner layer molten steel with the temperature of 1520-1540 ℃ when the injected inner layer molten steel is in a semi-solidification state; when the inner layer is solidified and the temperature is about 800 ℃, taking the workpiece out of the metal mold, and carrying out refined grain annealing by transferring to a heat treatment furnace;
D. fine grain annealing, namely placing a 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, and discharging and air cooling;
E. rough machining is carried out on the annealed workpiece, and a 5mm allowance is reserved on an inner hole and two end faces;
F. Finally, carrying out heat treatment, namely removing a locating sleeve (20), putting a workpiece into a heat treatment furnace, slowly heating to 930-1030 ℃ for heat preservation for 10-15 hours, then carrying out air cooling to below 50 ℃, tempering at 220-480 ℃, cooling to below 150 ℃ along with the furnace, and discharging;
G. and (5) carrying out finish machining according to the drawing requirements.
7. The method for preparing the armor nail roller sleeve according to claim 6, wherein: in the step A, the armor nail (10) comprises 50-60% by mass of titanium carbide, 3-10% by mass of tungsten carbide, and the balance of binder, or comprises 65-70% by mass of tungsten carbide or 5-10% by mass of titanium carbide, and the balance of binder; the binder is a mixture of iron, nickel, molybdenum, cobalt and manganese, and the proportion 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 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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