CN115324599A - Cutter ring for hob and manufacturing method thereof - Google Patents

Cutter ring for hob and manufacturing method thereof Download PDF

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Publication number
CN115324599A
CN115324599A CN202211070420.8A CN202211070420A CN115324599A CN 115324599 A CN115324599 A CN 115324599A CN 202211070420 A CN202211070420 A CN 202211070420A CN 115324599 A CN115324599 A CN 115324599A
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China
Prior art keywords
cutter ring
cutter
percent
root
hob
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CN202211070420.8A
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Chinese (zh)
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林镇华
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Jiangsu Kangshanyan Engineering Equipment Co ltd
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Jiangsu Kangshanyan Engineering Equipment Co ltd
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Priority to CN202211070420.8A priority Critical patent/CN115324599A/en
Publication of CN115324599A publication Critical patent/CN115324599A/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • 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
    • C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
    • 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
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium 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
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Milling Processes (AREA)

Abstract

The invention discloses a cutter ring for a hob cutter and a manufacturing method thereof, wherein the cutter ring comprises a cutting edge and a cutter ring body, the integral hardness of the cutter ring is HRC57-60, the outer surface of the cutter ring body is of a cylindrical structure, the cutting edge comprises a root part and a cutter body part, the root part is connected with the outer surface of the cutter ring body, the cutter body part extends from the root part along the circumferential direction of the cutter ring body, the surface of one end, far away from the root part, of the cutter body part is sequentially provided with a tungsten carbide welding layer and an adhesive phase layer, and the adhesive phase layer is arranged on one side, close to the root part, of the tungsten carbide welding layer. The invention solves the technical problem of abrasion or impact deformation of the cutter ring caused by low hardness or stress concentration in the use process.

Description

Cutter ring for hob and manufacturing method thereof
Technical Field
The invention relates to the technical field of cutter machining and manufacturing, in particular to a cutter ring for a hob and a manufacturing method thereof.
Background
The disk-shaped hob of the shield machine is assembled by parts such as a hob ring, a hob body, a mandrel and the like, the hob body is sleeved on the mandrel through a bearing, the hob ring is installed on the hob body, the end face of the hob ring uses a welded check ring as a limit, when the disk-shaped hob with the structural form breaks rocks in a sandy gravel stratum with uneven hardness and a quartz sand stratum with strong grinding performance, the hob ring is broken or shifted due to impact, and the hob body is worn or deformed due to early abrasion or impact due to low hardness, so that the hob body has to be frequently replaced and repaired; meanwhile, the phenomenon of stress concentration is easily generated in the interference assembly process of the cutter ring and the cutter body, so that the service life and the construction efficiency of the hob are greatly influenced. And the conventional TBM hob ring has insufficient wear resistance, is very easy to generate eccentric wear, edge curling and edge tipping under extreme geological conditions, has frequent tool changing, causes low tunneling efficiency, has poor economic benefit and influences the construction period.
In recent years, as laser melting and plasma melting technologies are developed and mature, the application of the technology to a hob ring is increased, but the effect is still not ideal, and stress concentration exists in a cladding layer, so that the cladding layer is easy to peel off from an alloy body in a situation with large impact, and the using effect is influenced.
Disclosure of Invention
The embodiment of the invention provides a cutter ring for a hob and a manufacturing method thereof, which effectively solve the technical problem of abrasion or impact deformation of the cutter ring caused by low hardness or stress concentration in the use process of the cutter ring.
In order to solve the technical problem, the embodiment of the invention discloses a cutter ring for a hob, the cutter ring comprises a cutting edge and a cutter ring body, the overall hardness of the cutter ring is HRC 5-60, the outer surface of the cutter ring body is of a cylindrical structure, the cutting edge comprises a root part and a cutter body part, the root part is connected with the outer surface of the cutter ring body, the cutter body part extends from the root part along the circumferential direction of the cutter ring body, the surface of one end, far away from the root part, of the cutter body part is sequentially provided with a tungsten carbide welding layer and an adhesive phase layer, and the adhesive phase layer is arranged on one side, close to the root part, of the tungsten carbide welding layer.
Furthermore, the root part is provided with at least two pore channels which are symmetrically distributed along the cutter ring body.
Furthermore, a transition structure is arranged at the overlapping part of the pore passage and the rest part of the root part.
Further, the cutter ring is prepared from the following raw materials in percentage by weight: 0.65-0.75 percent of C, 0.2-0.5 percent of Si, 0.4-0.6 percent of Mn, 5.0-6.0 percent of Cr, 2.2-2.4 percent of Mo, 0.5-0.7 percent of V, 0.001-0.015 percent of P, 0.005-0.015 percent of S and the balance of Fe.
Further, the cutter ring is prepared from the following raw materials in percentage by weight: 0.54 to 0.57 percent of C, 0.3 to 0.5 percent of Si, 0.3 to 0.5 percent of Mn, 4.5 to 5.5 percent of Cr, 2.9 to 3.1 percent of Mo, 0.1 to 0.15 percent of Nb, 0.005 to 0.015 percent of P, 0.005 to 0.015 percent of S and the balance of Fe.
The embodiment of the invention also discloses a manufacturing method of the cutter ring for the hob, which comprises the following steps:
machining the cutter ring substrate, and performing surface treatment;
a notch part is arranged on the surface of one end of the cutter body part far away from the root part;
carrying out high-frequency annealing treatment on the notch part, wherein the annealing treatment depth is not less than 2.5MM, and forming the viscous phase layer;
and laser welding the tungsten carbide welding layer on the notch part.
Further, after the step of laser welding the tungsten carbide weld layer at the notch portion, the method further includes:
cleaning, loading into a vacuum heat treatment furnace, heating to 200 deg.C, holding for 4 hr, cooling, and discharging.
Further, the method further comprises:
drilling a hole in the symmetrical position of the root part, so that the hole is distributed symmetrically along the cutter ring body.
Further, after the step of drilling the hole-forming hole channel at the symmetrical position of the root, the method further comprises:
chamfering or rounding the bore and the remainder of the root to form a transition structure.
Further, after the step of chamfering or rounding the hole passage and the rest of the root, the method further comprises:
and polishing the inner surface of the pore channel.
The implementation of the invention has the following beneficial effects:
the cutter ring comprises a cutting edge and a cutter ring body, wherein the integral hardness of the cutter ring is HRC-, the outer surface of the cutter ring body is of a cylindrical structure, the cutting edge comprises a root part and a cutter body part, the root part is connected with the outer surface of the cutter ring body, and the cutter body part extends from the root part along the circumferential direction of the cutter ring body.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art 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 without creative efforts.
Fig. 1 is a schematic axial sectional view of a cutter ring for a hob according to an embodiment of the present invention.
Fig. 2 is a schematic view of an overall structure of a cutter ring for a hob according to an embodiment of the present invention.
Fig. 3 is a schematic overall structural diagram of a cutter ring for a hob provided in another embodiment of the present invention.
Fig. 4 is a schematic flow chart illustrating steps of a method for manufacturing a cutter ring for a hob according to an embodiment of the present invention.
Fig. 5 is a flow chart illustrating steps of a manufacturing method of a cutter ring for a hob according to another embodiment of the present invention.
Wherein the reference numerals in the figures correspond to: 100-cutter ring, 10-cutter ring body, 20-cutter edge, 21-root, 211-pore channel, 22-cutter body part, 221-tungsten carbide welding layer and 222-binder phase layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defined as "first", "second" may explicitly or implicitly include one or more of those features, in the description of the invention "plurality" means two or more unless explicitly defined otherwise.
Fig. 1 is a schematic axial sectional view of a cutter ring for a hob provided in an embodiment of the present invention, and fig. 2 is a schematic overall structural view of the cutter ring for a hob provided in an embodiment of the present invention. As shown in fig. 1 and fig. 2, an embodiment of the present invention discloses a cutter ring 100 for a hob, wherein a blank finished product of the cutter ring 100 is obtained through a forging process, specifically, after material is cut by a sawing machine, a raw material is cut into a preset size to obtain a round bar, the cut round bar is put into an electric heating furnace, three-stage temperature rise of the electric heating furnace is controlled, each time the temperature rise time is 4 hours until the temperature is 1100 ℃ suitable for forging, a manipulator grabs the round bar to a forging platform for forging a base of a double-arm device, the round bar is forged to one third of the height of the round bar from the original height through input parameters to obtain a round cake, a suitable punch is replaced, the round cake is punched in the center to punch a hole in the center of the round cake, after the hole is punched, an outer ring of the blank is rapidly forged to a ring size, after the round cake is put into the furnace again and heated, a ring rolling machine is used for reaming to process an outer diameter of a cutting edge, and then spheroidizing annealing is performed, thereby obtaining a blank finished product.
And continuously processing the blank finished product to obtain the cutter ring 100. The cutter ring 100 comprises a cutting edge 20 and a cutter ring body 10, the cutter ring 100 is of an integral type, the problem of stress concentration caused by interference assembly of a separated cutter ring is solved, the integral hardness of the cutter ring 100 is HRC57-60, the outer surface of the cutter ring body 10 is of a cylindrical structure, the cutting edge 20 comprises a root portion 21 and a cutter body portion 22, the root portion 21 is connected with the outer surface of the cutter ring body 10, the cutter body portion 22 extends from the root portion 21 along the circumferential direction of the cutter ring body 10, a tungsten carbide welding layer 221 and a binder phase layer 222 are sequentially arranged on the surface of one end, far away from the root portion 21, of the cutter body portion 22, the binder phase layer 222 is arranged on one side, close to the root portion 21, of the tungsten carbide welding layer 221 is obtained through laser welding of tungsten carbide, normal tungsten carbide is welded aiming at low-hardness steel, in the invention, the integral hardness of the cutter ring 100 is HRC57-60, the tungsten carbide welding layer 221 is arranged after the binder phase layer 222 is arranged, the tungsten carbide welding layer 221 is not easy to harden the welding layer 221 and the cutting edge welding layer is not easy to dissolve, and the cutting edge of the cutter ring 100 is prevented from being broken under the condition that the HrC57 and the tungsten carbide welding layer is not easy to dissolve.
Fig. 3 is a schematic view of the overall structure of a cutter ring for a hob according to another embodiment of the present invention, and as shown in fig. 3, the root portion 21 is provided with at least two duct channels 211, and the duct channels 211 are symmetrically distributed along the cutter ring body 10. Specifically, on the premise that the strength of the cutter ring 100 is not affected, 2 pore channels 211, 3 pore channels 211, 4 pore channels 211 or 6 pore channels 211 can be arranged, the number of the pore channels is not limited, the diameter of each pore channel 211 is not more than one tenth of the outer diameter of the cutter ring body 10, the pore channels 211 penetrate through the root portion 21, the pore channels 211 are symmetrically distributed along the center line of the cutter ring 100, the pore channels 211 are arranged on the root portion 21 to release stress, the overall performance of the cutter ring 100 is improved, and the reliability of the cutter ring 100 is improved in the process of actually digging rock strata.
In the embodiment of the present invention, a transition structure is disposed at the overlapping position of the duct 211 and the rest of the root 21. The transition structure ensures smooth transition of the lap joint of the edge of the duct 211 and the rest of the root 21, avoids stress concentration at the lap joint of the duct 211 and the rest of the root 21, avoids weakening the overall strength of the cutter ring 100 after the duct 211 is arranged, improves the compression resistance and impact resistance of the cutter ring 100, and reduces the occurrence of tipping and ring breaking.
In the embodiment of the invention, the cutter ring 100 is made of the following raw materials in percentage by weight: 0.65-0.75 of C, 0.2-0.5 of Si, 0.4-0.6 of Mn, 5.0-6.0 of Cr, 2.2-2.4 of Mo, 0.5-0.7 of V, 0.001-0.015 of P, 0.005-0.015 of S and the balance of Fe, wherein the integral hardness of the cutter ring 100 is HRC 58-60, preferably, 0.65-0.75 of C, 0.2-0.5 of Si, 0.4-0.6 of Mn, 5.0-6.0 of Cr and 2.2-2.4 of MoV0.5-0.7, P0.015 and S0.015 as raw materials of the cutter ring 100, the raw materials are used as materials of the cutter ring 100, the integral hardness of the cutter ring 100 after vacuum heat treatment is HRC 58-60, the cutter ring is suitable for complex rock formations with uneven hardness, has high toughness, better strength and wear resistance, and has the uniaxial compressive strength of 100-160mpa/cm 2 In the complete granite, the comprehensive tunneling ruler adopting the cutter ring made of the material can reach 150-200 m, and the performance of the comprehensive tunneling ruler is improved by 20-30% compared with that of most of other cutter rings.
In the embodiment of the invention, the cutter ring 100 is made of the following raw materials in percentage by weight: 0.54-0.57 of C, 0.3-0.5 of Si, 0.3-0.5 of Mn, 4.5-5.5 of Cr, 2.9-3.1 of Mo, 0.1-0.15 of Nb, 0.005-0.015 of P, 0.005-0.015 of S, and the balance of Fe, preferably, 0.54-0.57 of C, 0.3-0.5 of Si, 0.3-0.5 of Mn, 4.5-5.5 of Cr, 2.9-3.1 of Mo, 0.1-0.15 of Nb, 0.015 of P, and 0.015 of S, and the balance of Fe can be used as the raw material of the cutter ring 100, the material is used as the material of the cutter ring 100, and the overall hardness of the cutter ring 100 after vacuum heat treatment is HRC 57-59, so that the cutter ring is suitable for complex rock formations with uneven hardness, can bear heavy load and impact resistance, and has better wear resistance.
Fig. 4 is a schematic flow chart illustrating steps of a manufacturing method of a cutter ring for a hob according to an embodiment of the present invention, and as shown in fig. 4, the embodiment of the present invention further discloses a manufacturing method of a cutter ring 100 for a hob, which includes the following steps.
Step S1: the base body of the cutter ring 100 is machined and surface-treated.
In the step, a sawing machine is used for cutting raw materials into preset sizes to obtain round rods, the cut round rods are put into an electric heating furnace, the electric heating furnace is controlled to be heated for three times, the heating time is 4 hours each time until the temperature is raised to be suitable for the forging temperature of 1100 ℃, then the round rods are subjected to vertical face forging and pressing according to the high forging ratio of 3 to more than 1, after forging and pressing, the proper heads are replaced to punch holes in the center of a round cake, after the punching is completed, the outer ring of a blank is rapidly forged and opened to the size of a ring, after the blank is put into the furnace and heated again, the ring rolling machine is used for reaming and processing an outer diameter cutting edge, spheroidizing annealing is carried out, then the cutter ring 100 is fixed, and under the condition that the requirements of corresponding size tolerance and roughness are met, the outlines of the outer circle, the edge type and each part of the end face of the cutter ring 100 are processed.
Step S2: a notched portion is provided on a surface of one end of the blade portion 22 remote from the root portion 21.
In this step, the end of the cutter body 22 is subjected to numerical control machining to obtain a notch portion for facilitating laser welding of tungsten carbide and enhancing the strength of the cutter ring 100.
And step S3: and performing high-frequency annealing treatment on the notch part, wherein the annealing treatment depth is not less than 2.5MM, and forming the viscous phase layer 222.
In this step, by subjecting the notch portion to high-frequency annealing, it is preferable that the annealing depth be 3 mm. Through local annealing, the hardness of the cutting edge 20 is also made to be greater than that of the cutter ring body 10, so that the cutter ring 100 forms a condition that an inner ring is soft and hard, a certain hardness gradient is formed, and the impact toughness of the cutter ring 100 is improved.
And step S4: and laser welding the tungsten carbide welding layer 221 on the notch part.
In this step, tungsten carbide is brazed to the groove portion after the annealing treatment, and the tungsten carbide brazing layer 221 and the binder phase layer 222 can be bonded to each other, so that cracking of the tungsten carbide brazing layer 221 is reduced and the layer is not easily removed.
In an embodiment of the present invention, with continued reference to fig. 4, after the step of laser welding the tungsten carbide weld layer 221 at the notch portion, the method further comprises the following steps.
And S5, cleaning, loading into a vacuum heat treatment furnace, raising the temperature of the furnace to 200 ℃, keeping the temperature for 4 hours, cooling along with the furnace, and discharging.
In the step, in a vacuum heat treatment furnace, the furnace temperature is controlled to be 30Min, the temperature is increased to 200 ℃, then the temperature is kept for 4 hours, and finally the furnace is cooled to the room temperature along with the furnace, and the product is discharged.
Fig. 5 is a schematic flow chart illustrating steps of a manufacturing method of a cutter ring for a hob according to another embodiment of the present invention. In an embodiment of the invention, the method further comprises the following steps.
And S21, drilling holes 211 at symmetrical positions of the root 21 so that the holes 211 are symmetrically distributed along the cutter ring body 10.
The step of drilling the hole channels 211 is disposed before the step S3, so that the hole channels 211 located at the root portion 21 can be subjected to the annealing treatment of the step S3 to receive the deformation caused by the corresponding stress release during the annealing treatment.
In an embodiment of the present invention, with continued reference to fig. 5, after the step of drilling the hole-forming holes 211 at the symmetrical positions of the root portions 21, the method further comprises the following steps.
And S22, chamfering or rounding the pore passage 211 and the rest part of the root part 21 to form a transition structure.
In this step, the hole 211 and the cutting edge 20 are smoothly connected by chamfering or rounding the rest of the hole 211 and the root 21, so that a step or a protrusion is avoided to cause stress concentration, and the performance of the cutter ring 100 is improved.
In an embodiment of the present invention, with continued reference to fig. 5, after the step of chamfering or rounding the bore 211 and the rest of the root 21, the method further comprises the following steps.
Step S22 of polishing the inner surface of the pore 211.
In this step, the smoothness of the inner surface of the hole 211 is further increased by polishing treatment, so that the introduction of a stress defect part is avoided, and the overall strength and impact resistance of the cutter ring 100 are increased.
The cutter ring 100 comprises a cutting edge 20 and a cutter ring body 10, the integral hardness of the cutter ring 100 is HRC57-60, in the invention, the cutter ring 100 is integral, the problem of stress concentration caused by interference assembly of the cutter ring 100 and a cutter body is avoided, a tungsten carbide welding layer 221 and a binder phase layer 222 are sequentially arranged on the surface of one end, away from the root 21, of the cutter body part 22, the binder phase layer 222 is arranged on one side, close to the root 21, of the tungsten carbide welding layer 221, normal tungsten carbide is low-hardness quenched and tempered steel, the invention adopts the binder phase layer 222 on the basis of the original material to perform laser welding on a carbonized dock, so that cracking of the tungsten carbide welding layer 221 is reduced, the tungsten carbide welding layer is dissolved with the binder phase layer 222 more deeply, layers are not prone to fall, the condition that the base metal with hardness Hrc57-60 is not suitable for welding is avoided, and the integral performance of the cutter ring 100 is improved.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (10)

1. The cutter ring for the hob cutter is characterized in that the cutter ring (100) comprises a cutting edge (20) and a cutter ring body (10), the overall hardness of the cutter ring (100) is HRC57-60, the outer surface of the cutter ring body (10) is of a cylindrical structure, the cutting edge (20) comprises a root portion (21) and a cutter body portion (22), the root portion (21) is connected with the outer surface of the cutter ring body (10), the cutter body portion (22) extends from the root portion (21) along the circumferential direction of the cutter ring body (10), a tungsten carbide welding layer (221) and an adhesion layer (222) are sequentially arranged on the surface of one end, far away from the root portion (21), of the cutter body portion (22), and the adhesion layer (222) is arranged on one side, close to the root portion (21), of the tungsten carbide welding layer (221).
2. The cutter ring for hobs according to claim 1, characterized in that the root (21) is provided with at least two portholes (211), said portholes (211) being symmetrically distributed along the cutter ring body (10).
3. The ring according to claim 1, wherein the transition structure is provided at the overlapping point of the duct (211) and the rest of the root (21).
4. The cutter ring for the hob according to claim 1, wherein the cutter ring (100) is made of the following raw materials in percentage by weight: 0.65-0.75 percent of C, 0.2-0.5 percent of Si, 0.4-0.6 percent of Mn, 5.0-6.0 percent of Cr, 2.2-2.4 percent of Mo, 0.5-0.7 percent of V, 0.001-0.015 percent of P, 0.005-0.015 percent of S and the balance of Fe.
5. The cutter ring for the hob according to claim 1, wherein the cutter ring (100) is made of the following raw materials in percentage by weight: 0.54 to 0.57 percent of C, 0.3 to 0.5 percent of Si, 0.3 to 0.5 percent of Mn, 4.5 to 5.5 percent of Cr, 2.9 to 3.1 percent of Mo, 0.1 to 0.15 percent of Nb, 0.005 to 0.015 percent of P, 0.005 to 0.015 percent of S and the balance of Fe.
6. A method of manufacturing a cutter ring for a hob, the method comprising:
machining the cutter ring (100) substrate, and performing surface treatment;
a notch part is arranged on the surface of one end of the cutter body part (22) far away from the root part (21);
carrying out high-frequency annealing treatment on the notch part, wherein the annealing treatment depth is not less than 2.5MM, and forming the viscous phase layer (222);
and laser welding the tungsten carbide welding layer (221) at the notch part.
7. The method for manufacturing a ring for a hob according to claim 6, wherein after the step of laser welding the tungsten carbide welding layer (221) at the notch portion, the method further comprises:
cleaning, loading into a vacuum heat treatment furnace, heating to 200 deg.C, holding for 4 hr, cooling, and discharging.
8. The method for manufacturing a cutter ring for a hob according to claim 6, characterized in that the method further comprises:
drilling hole channels (211) at symmetrical positions of the root part (21) so that the hole channels (211) are symmetrically distributed along the cutter ring body (10).
9. The method for manufacturing a cutter ring for a hob according to claim 8, characterized in that after the step of drilling the hole channels (211) at the symmetrical positions of the root (21), the method further comprises:
the bore (211) and the rest of the root (21) are chamfered or rounded to form a transition structure.
10. The method for manufacturing a rim for a hob according to claim 9, characterized in that after the step of chamfering or rounding the bore (211) and the rest of the root (21), the method further comprises:
and polishing the inner surface of the pore channel (211).
CN202211070420.8A 2022-09-02 2022-09-02 Cutter ring for hob and manufacturing method thereof Withdrawn CN115324599A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116422832A (en) * 2023-04-27 2023-07-14 西安理工大学 Wear-resistant shield machine hob cutter and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116422832A (en) * 2023-04-27 2023-07-14 西安理工大学 Wear-resistant shield machine hob cutter and preparation method thereof
CN116422832B (en) * 2023-04-27 2023-10-13 西安理工大学 Wear-resistant shield machine hob cutter and preparation method thereof

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