CN113862669A - Surface strengthening protection process for steel cone pagoda drill bit - Google Patents
Surface strengthening protection process for steel cone pagoda drill bit Download PDFInfo
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- CN113862669A CN113862669A CN202111147058.5A CN202111147058A CN113862669A CN 113862669 A CN113862669 A CN 113862669A CN 202111147058 A CN202111147058 A CN 202111147058A CN 113862669 A CN113862669 A CN 113862669A
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- 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
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
- C23C26/02—Coating not provided for in groups C23C2/00 - C23C24/00 applying molten material to the substrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- 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
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to the technical field of drill bit surface processing, and discloses a steel pagoda drill bit surface strengthening protection process; the surface strengthening protection process for the steel cone pagoda drill bit comprises the following steps: s1: preparing materials; s2: cleaning the workpiece; s3: surface coating; s4: heat preservation treatment; s5: testing the strength; s6: cleaning; s7: checking; s8: packaging and warehousing; the reinforced layer on the surface of the drill bit by using the surfacing process has high hardness and high strength of being combined with a machine body, the strength of the reinforced layer on the surface of the drill bit is enhanced, the erosion resistance of the surface of the drill bit is improved, and the surface of the drill bit is effectively protected; the surface of the drill bit is subjected to surfacing welding by using tungsten carbide as a raw material, the tungsten carbide consists of WC and W2C, the hardness, the strength and the melting point are high, the chemical property of the tungsten carbide is stable, the wear resistance and the abrasion resistance of the tungsten carbide are the best, and the quality of a surface strengthening layer of the drill bit is further improved; the operation process is simple and convenient, the used equipment is simple, and the production cost is low.
Description
Technical Field
The invention belongs to the technical field of drill bit surface processing, and particularly relates to a steel pagoda drill bit surface strengthening protection process.
Background
The step drill is also called a step drill or a pagoda drill, and is mainly used for drilling and processing thin steel plates within 3mm, one drill can replace a plurality of drills to process holes with different diameters as required, and large holes can be processed at one time without replacing the drill, drilling positioning holes and the like.
The existing drill bit surface strengthening layer is not well combined with a machine body, the erosion resistance is low, the strengthening layer is easy to peel off from the machine body, and the use efficiency of the drill bit is influenced; therefore, improvements are now needed in view of the current situation.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a steel pagoda drill bit surface strengthening protection process, which effectively solves the problems that the existing drill bit surface strengthening layer is not well combined with a machine body, the erosion resistance is low, the strengthening layer is easy to peel off from the machine body, and the use efficiency of the drill bit is influenced.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of food compound seasoning sauce comprises the following steps: .
Preferably, S1: preparing materials: selecting tungsten carbide alloy, and casting the tungsten carbide alloy into a metal welding wire thin strip with the thickness of 3-5 mm;
s2: cleaning the workpiece: the method comprises the following steps: cleaning up some oxides, rust and other sundries on the surface of the drill bit by using a grinding machine, removing burrs, and baking oil stains or water stains attached to the surface of the drill bit by using a blast burner;
secondly, the step of: putting the drill bit with the processed surface into a preheating furnace for heating treatment, keeping the preheating temperature at 200-500 ℃, and taking out after preheating for 8-10 min;
s3: surface coating: carrying out surfacing protection on the surface of the drill bit by using a surfacing technology;
the method comprises the following steps: heating the front surface of the drill bit by using weak carbon flame of a welding torch until the front surface is dark red, holding the welding torch by the left hand and holding a tungsten carbide welding wire by the right hand to add into a molten pool for melting when the surface is in a micro-melting state, and overlaying the surface of the drill bit;
secondly, the step of: the method is characterized in that surfacing strengthening treatment is carried out on a plurality of surfaces of the drill bit by the same method, flame is required to be moved continuously during surfacing, and local overhigh temperature is avoided;
s4: and (3) heat preservation treatment: wrapping the drill bit with the surface subjected to surfacing reinforcement in the step S3 with asbestos cloth, and slowly cooling the drill bit to room temperature for 5-8 h;
s5: and (3) testing the strength: preventing the drill bit subjected to surfacing in the step S3 from being in an experimental pool, testing the strength erosion resistance of the drill bit, adding silica sand into the experimental pool, keeping the pump pressure at 10-15MPa, and stopping taking out the drill bit after lasting for 10-20min, wherein the surface strengthening layer of the drill bit has no obvious erosion;
s6: cleaning: putting the drill bit which reaches the standard after the test in the step S5 into an ultrasonic cleaning machine, cleaning the drill bit for 10-15min, and taking out;
s7: and (4) checking: checking the appearance of the drill cleaned in the step S6 to check whether the surface of the drill is smooth, whether the surface has a bump phenomenon, and the like;
s8: packaging and warehousing: and packaging the drill bits qualified through the inspection in the step S7, and after the packaging is finished, transporting the drill bits to a warehouse for storage.
Preferably, the surface roughness of the drill bit polished in the step S2 is 11-24, so that the metallic luster of the surface is exposed, and the surface of the drill bit treated in the step S2 is subjected to surfacing immediately, so as to avoid that the surface of the drill bit is re-stained with stains or oxidized due to too long retention time.
Preferably, in step S3, a third welding torch and a welding tip are used, the oxygen pressure is 0.03 to 0.16MPa, and the acetylene pressure is 0.01 to 0.015 MPa.
Preferably, in step S3, the welding torch tip angle and the horizontal plane are maintained at 30 degrees, the welding wire and the horizontal plane are maintained at 45 degrees, and the welding method adopts a left-hand welding method, so that the build-up welding speed is high.
Preferably, in the step S3, welding is started from a position 2-4mm inward from the drill, the welding wire can be melted if the surface of the alloy is wrinkled or shiny, and the welding wire needs to be immediately processed if bubbles are generated on the surface of the molten pool during the overlaying process.
Preferably, the polisher in the step S2 is a full-automatic magnetic polishing polisher, the model of the polisher is HF30-3, and the polisher liner is made of a PU material, so that the polisher is more corrosion-resistant and wear-resistant.
Preferably, the preheating furnace in the step S2 is a heat treatment heating furnace of type SX2-4-10, a safety switch is arranged in the heating furnace, the power is automatically cut off when the door of the heating furnace is opened, and a durable heating element is arranged in the heating furnace and is easy to replace.
Preferably, the ultrasonic cleaning machine in the step S6 is a single-tank ultrasonic cleaning machine, the model of the ultrasonic cleaning machine is JP-360ST, the outer plate and the cleaning basket are both made of 304 stainless steel, and the volume of the ultrasonic cleaning machine is 135L.
Compared with the prior art, the invention has the beneficial effects that: 1. the reinforced layer on the surface of the drill bit by using the surfacing process has high hardness and high strength of being combined with a machine body, the strength of the reinforced layer on the surface of the drill bit is enhanced, the erosion resistance of the surface of the drill bit is increased, and the surface of the drill bit is effectively protected;
2. the surface of the drill bit is subjected to surfacing welding by using tungsten carbide as a raw material, wherein the tungsten carbide consists of WC and W2C, has high hardness, strength and melting point, is stable in chemical property and best in wear resistance of the tungsten carbide, and further improves the quality of a surface strengthening layer of the drill bit;
3. the invention has simple, convenient and flexible operation process, smooth and beautiful surface of the obtained drill bit, good quality, simple used equipment and low production cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a flow chart of the present invention;
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 given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the surface strengthening protection process for a steel pagoda drill bit of the present invention includes the following steps: s1: preparing materials: selecting tungsten carbide alloy, and casting the tungsten carbide alloy into a metal welding wire thin strip with the thickness of 3-5 mm;
s2: cleaning the workpiece: the method comprises the following steps: cleaning up some oxides, rust and other sundries on the surface of the drill bit by using a grinding machine, removing burrs, and baking oil stains or water stains attached to the surface of the drill bit by using a blast burner;
secondly, the step of: putting the drill bit with the processed surface into a preheating furnace for heating treatment, keeping the preheating temperature at 200-500 ℃, and taking out after preheating for 8-10 min;
s3: surface coating: carrying out surfacing protection on the surface of the drill bit by using a surfacing technology;
the method comprises the following steps: heating the front surface of the drill bit by using weak carbon flame of a welding torch until the front surface is dark red, holding the welding torch by the left hand and holding a tungsten carbide welding wire by the right hand to add into a molten pool for melting when the surface is in a micro-melting state, and overlaying the surface of the drill bit;
secondly, the step of: the method is characterized in that surfacing strengthening treatment is carried out on a plurality of surfaces of the drill bit by the same method, flame is required to be moved continuously during surfacing, and local overhigh temperature is avoided;
s4: and (3) heat preservation treatment: wrapping the drill bit with the surface subjected to surfacing reinforcement in the step S3 with asbestos cloth, and slowly cooling the drill bit to room temperature for 5-8 h;
s5: and (3) testing the strength: preventing the drill bit subjected to surfacing in the step S3 from being in an experimental pool, testing the strength erosion resistance of the drill bit, adding silica sand into the experimental pool, keeping the pump pressure at 10-15MPa, and stopping taking out the drill bit after lasting for 10-20min, wherein the surface strengthening layer of the drill bit has no obvious erosion;
s6: cleaning: putting the drill bit which reaches the standard after the test in the step S5 into an ultrasonic cleaning machine, cleaning the drill bit for 10-15min, and taking out;
s7: and (4) checking: checking the appearance of the drill cleaned in the step S6 to check whether the surface of the drill is smooth, whether the surface has a bump phenomenon, and the like;
s8: packaging and warehousing: and packaging the drill bits qualified through the inspection in the step S7, and after the packaging is finished, transporting the drill bits to a warehouse for storage.
Wherein, the roughness of the surface of the drill bit polished in the step S2 can be 11-24, so that the surface of the drill bit is exposed with metallic luster, the surface of the drill bit processed in the step S2 is subjected to surfacing immediately, the phenomenon that the surface of the drill bit is stained or oxidized again due to overlong retention time is avoided, a third welding torch and a welding nozzle are adopted in the step S3, the oxygen pressure is 0.03-0.16MPa, the acetylene pressure is 0.01-0.015MPa, the angle of the welding torch welding nozzle and the horizontal plane is kept at 30 degrees in the step S3, the welding wire and the horizontal plane are kept at 45 degrees, a left welding method is adopted in the welding method, the surfacing speed is high, welding is started from the drill bit to the position of 2-4mm when welding is carried out in the step S3, the welding wire can be melted when wrinkling or lightening is found on the alloy surface, the welding wire needs to be processed if bubbles and the like are found on the surface of a molten pool immediately in the surfacing process, a full-automatic magnetic polisher is adopted in the step S2, the model of the grinding machine is HF30-3, the lining of the grinding machine is made of PU materials, the grinding machine is more corrosion-resistant and wear-resistant, the preheating furnace in the step S2 is an SX2-4-10 heat treatment heating furnace, a safety switch is arranged in the heating furnace, the furnace is automatically powered off when a furnace door is opened, a durable heating element is easily replaced in the heating furnace, the ultrasonic cleaning machine in the step S6 is a single-groove ultrasonic cleaning machine, the model of the ultrasonic cleaning machine is JP-360ST, the outer plate and the cleaning basket are both made of 304 stainless steel, and the volume of the ultrasonic cleaning machine is 135L.
Example one
A steel cone drill bit surface strengthening protection process comprises the following steps: s1: preparing materials: selecting tungsten carbide alloy, and casting the tungsten carbide alloy into a metal welding wire thin strip with the thickness of 3-5 mm;
s2: cleaning the workpiece: the method comprises the following steps: cleaning up some oxides, rust and other sundries on the surface of the drill bit by using a grinding machine, removing burrs, and baking oil stains or water stains attached to the surface of the drill bit by using a blast burner;
secondly, the step of: putting the drill bit with the processed surface into a preheating furnace for heating treatment, keeping the preheating temperature at 200-500 ℃, and taking out after preheating for 8-10 min;
s3: surface coating: carrying out surfacing protection on the surface of the drill bit by using a surfacing technology;
the method comprises the following steps: heating the front surface of the drill bit by using weak carbon flame of a welding torch until the front surface is dark red, holding the welding torch by the left hand and holding a tungsten carbide welding wire by the right hand to add into a molten pool for melting when the surface is in a micro-melting state, and overlaying the surface of the drill bit;
secondly, the step of: the method is characterized in that surfacing strengthening treatment is carried out on a plurality of surfaces of the drill bit by the same method, flame is required to be moved continuously during surfacing, and local overhigh temperature is avoided;
s4: and (3) heat preservation treatment: wrapping the drill bit with the surface subjected to surfacing reinforcement in the step S3 with asbestos cloth, and slowly cooling the drill bit to room temperature for 5-8 h;
s5: and (3) testing the strength: preventing the drill bit subjected to surfacing in the step S3 from being in an experimental pool, testing the strength erosion resistance of the drill bit, adding silica sand into the experimental pool, keeping the pump pressure at 10-15MPa, and stopping taking out the drill bit after lasting for 10-20min, wherein the surface strengthening layer of the drill bit has no obvious erosion;
s6: cleaning: putting the drill bit which reaches the standard after the test in the step S5 into an ultrasonic cleaning machine, cleaning the drill bit for 10-15min, and taking out;
s7: and (4) checking: checking the appearance of the drill cleaned in the step S6 to check whether the surface of the drill is smooth, whether the surface has a bump phenomenon, and the like;
s8: packaging and warehousing: and packaging the drill bits qualified through the inspection in the step S7, and after the packaging is finished, transporting the drill bits to a warehouse for storage.
The reinforced layer on the surface of the drill bit by using the surfacing process has high hardness and high strength of being combined with a machine body, the strength of the reinforced layer on the surface of the drill bit is enhanced, the erosion resistance of the surface of the drill bit is improved, and the surface of the drill bit is effectively protected.
Example two
A steel cone drill bit surface strengthening protection process comprises the following steps: s1: preparing materials: selecting tungsten carbide alloy, and casting the tungsten carbide alloy into a metal welding wire thin strip with the thickness of 3-5 mm;
s2: cleaning the workpiece: the method comprises the following steps: cleaning up some oxides, rust and other sundries on the surface of the drill bit by using a grinding machine, removing burrs, and baking oil stains or water stains attached to the surface of the drill bit by using a blast burner;
secondly, the step of: putting the drill bit with the processed surface into a preheating furnace for heating treatment, keeping the preheating temperature at 200-500 ℃, and taking out after preheating for 8-10 min;
s3: surface coating: carrying out surfacing protection on the surface of the drill bit by using a surfacing technology;
the method comprises the following steps: heating the front surface of the drill bit by using weak carbon flame of a welding torch until the front surface is dark red, holding the welding torch by the left hand and holding a tungsten carbide welding wire by the right hand to add into a molten pool for melting when the surface is in a micro-melting state, and overlaying the surface of the drill bit;
secondly, the step of: the method is characterized in that surfacing strengthening treatment is carried out on a plurality of surfaces of the drill bit by the same method, flame is required to be moved continuously during surfacing, and local overhigh temperature is avoided;
s4: and (3) heat preservation treatment: wrapping the drill bit with the surface subjected to surfacing reinforcement in the step S3 with asbestos cloth, and slowly cooling the drill bit to room temperature for 5-8 h;
s5: and (3) testing the strength: preventing the drill bit subjected to surfacing in the step S3 from being in an experimental pool, testing the strength erosion resistance of the drill bit, adding silica sand into the experimental pool, keeping the pump pressure at 10-15MPa, and stopping taking out the drill bit after lasting for 10-20min, wherein the surface strengthening layer of the drill bit has no obvious erosion;
s6: cleaning: putting the drill bit which reaches the standard after the test in the step S5 into an ultrasonic cleaning machine, cleaning the drill bit for 10-15min, and taking out;
s7: and (4) checking: checking the appearance of the drill cleaned in the step S6 to check whether the surface of the drill is smooth, whether the surface has a bump phenomenon, and the like;
s8: packaging and warehousing: and packaging the drill bits qualified through the inspection in the step S7, and after the packaging is finished, transporting the drill bits to a warehouse for storage.
The surface of the drill bit is subjected to surfacing welding by using tungsten carbide as a raw material, the tungsten carbide consists of WC and W2C, the tungsten carbide has high hardness, strength and melting point, the tungsten carbide has stable chemical properties, the tungsten carbide has the best abrasion resistance, and the quality of a surface strengthening layer of the drill bit is further improved.
EXAMPLE III
A steel cone drill bit surface strengthening protection process comprises the following steps: s1: preparing materials: selecting tungsten carbide alloy, and casting the tungsten carbide alloy into a metal welding wire thin strip with the thickness of 3-5 mm;
s2: cleaning the workpiece: the method comprises the following steps: cleaning up some oxides, rust and other sundries on the surface of the drill bit by using a grinding machine, removing burrs, and baking oil stains or water stains attached to the surface of the drill bit by using a blast burner;
secondly, the step of: putting the drill bit with the processed surface into a preheating furnace for heating treatment, keeping the preheating temperature at 200-500 ℃, and taking out after preheating for 8-10 min;
s3: surface coating: carrying out surfacing protection on the surface of the drill bit by using a surfacing technology;
the method comprises the following steps: heating the front surface of the drill bit by using weak carbon flame of a welding torch until the front surface is dark red, holding the welding torch by the left hand and holding a tungsten carbide welding wire by the right hand to add into a molten pool for melting when the surface is in a micro-melting state, and overlaying the surface of the drill bit;
secondly, the step of: the method is characterized in that surfacing strengthening treatment is carried out on a plurality of surfaces of the drill bit by the same method, flame is required to be moved continuously during surfacing, and local overhigh temperature is avoided;
s4: and (3) heat preservation treatment: wrapping the drill bit with the surface subjected to surfacing reinforcement in the step S3 with asbestos cloth, and slowly cooling the drill bit to room temperature for 5-8 h;
s5: and (3) testing the strength: preventing the drill bit subjected to surfacing in the step S3 from being in an experimental pool, testing the strength erosion resistance of the drill bit, adding silica sand into the experimental pool, keeping the pump pressure at 10-15MPa, and stopping taking out the drill bit after lasting for 10-20min, wherein the surface strengthening layer of the drill bit has no obvious erosion;
s6: cleaning: putting the drill bit which reaches the standard after the test in the step S5 into an ultrasonic cleaning machine, cleaning the drill bit for 10-15min, and taking out;
s7: and (4) checking: checking the appearance of the drill cleaned in the step S6 to check whether the surface of the drill is smooth, whether the surface has a bump phenomenon, and the like;
s8: packaging and warehousing: and packaging the drill bits qualified through the inspection in the step S7, and after the packaging is finished, transporting the drill bits to a warehouse for storage.
The invention has simple, convenient and flexible operation process, smooth and beautiful surface of the obtained drill bit, good quality, simple used equipment and low production cost.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A steel pagoda drill bit surface strengthening protection process is characterized in that: the method comprises the following steps:
s1: preparing materials: selecting tungsten carbide alloy, and casting the tungsten carbide alloy into a metal welding wire thin strip with the thickness of 3-5 mm;
s2: cleaning the workpiece: the method comprises the following steps: cleaning up some oxides, rust and other sundries on the surface of the drill bit by using a grinding machine, removing burrs, and baking oil stains or water stains attached to the surface of the drill bit by using a blast burner;
secondly, the step of: putting the drill bit with the processed surface into a preheating furnace for heating treatment, keeping the preheating temperature at 200-500 ℃, and taking out after preheating for 8-10 min;
s3: surface coating: carrying out surfacing protection on the surface of the drill bit by using a surfacing technology;
the method comprises the following steps: heating the front surface of the drill bit by using weak carbon flame of a welding torch until the front surface is dark red, holding the welding torch by the left hand and holding a tungsten carbide welding wire by the right hand to add into a molten pool for melting when the surface is in a micro-melting state, and overlaying the surface of the drill bit;
secondly, the step of: the method is characterized in that surfacing strengthening treatment is carried out on a plurality of surfaces of the drill bit by the same method, flame is required to be moved continuously during surfacing, and local overhigh temperature is avoided;
s4: and (3) heat preservation treatment: wrapping the drill bit with the surface subjected to surfacing reinforcement in the step S3 with asbestos cloth, and slowly cooling the drill bit to room temperature for 5-8 h;
s5: and (3) testing the strength: preventing the drill bit subjected to surfacing in the step S3 from being in an experimental pool, testing the strength erosion resistance of the drill bit, adding silica sand into the experimental pool, keeping the pump pressure at 10-15MPa, and stopping taking out the drill bit after lasting for 10-20min, wherein the surface strengthening layer of the drill bit has no obvious erosion;
s6: cleaning: putting the drill bit which reaches the standard after the test in the step S5 into an ultrasonic cleaning machine, cleaning the drill bit for 10-15min, and taking out;
s7: and (4) checking: checking the appearance of the drill cleaned in the step S6 to check whether the surface of the drill is smooth, whether the surface has a bump phenomenon, and the like;
s8: packaging and warehousing: and packaging the drill bits qualified through the inspection in the step S7, and after the packaging is finished, transporting the drill bits to a warehouse for storage.
2. The steel pagoda drill bit surface strengthening protection process according to claim 1, characterized in that: the roughness of the surface of the drill bit polished in the step S2 is 11-24, so that the surface of the drill bit is exposed with metal luster, and the surface of the drill bit treated in the step S2 is subjected to surfacing immediately, so that the phenomenon that the surface of the drill bit is stained or oxidized again due to overlong retention time is avoided.
3. The steel pagoda drill bit surface strengthening protection process according to claim 1, characterized in that: in the step S3, a third welding torch and a welding tip are used, the oxygen pressure is 0.03 to 0.16MPa, and the acetylene pressure is 0.01 to 0.015 MPa.
4. The steel pagoda drill bit surface strengthening protection process according to claim 1, characterized in that: in the step S3, the angle of the welding torch nozzle and the horizontal plane are kept at 30 degrees, the angle of the welding wire and the horizontal plane are kept at 45 degrees, and the welding method adopts a left welding method and is high in surfacing speed.
5. The steel pagoda drill bit surface strengthening protection process according to claim 1, characterized in that: in the step S3, welding is started from a position 2-4mm inward from the drill, the welding wire can be melted if the surface of the alloy is wrinkled or bright, and the welding wire needs to be immediately processed if the surface of the molten pool is bubbled during the surfacing process.
6. The steel pagoda drill bit surface strengthening protection process according to claim 1, characterized in that: the full-automatic magnetic grinding polisher is adopted as the polisher in the step S2, the model of the polisher is HF30-3, and the polisher lining is made of PU materials and is more corrosion-resistant and wear-resistant.
7. The steel pagoda drill bit surface strengthening protection process according to claim 1, characterized in that: the preheating furnace in the step S2 is a type SX2-4-10 heat treatment heating furnace, a safety switch is arranged in the heating furnace, the furnace door is automatically powered off when opened, and a durable heating element is arranged in the heating furnace and is easy to replace.
8. The steel pagoda drill bit surface strengthening protection process according to claim 1, characterized in that: the ultrasonic cleaning machine in the step S6 is a single-groove ultrasonic cleaning machine, the model of the ultrasonic cleaning machine is JP-360ST, the outer plate and the cleaning basket are both made of 304 stainless steel, and the volume of the ultrasonic cleaning machine is 135L.
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| CN202111147058.5A CN113862669A (en) | 2021-09-29 | 2021-09-29 | Surface strengthening protection process for steel cone pagoda drill bit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2675322Y (en) * | 2004-02-03 | 2005-02-02 | 四川石油管理局成都总机械厂 | Double tube alloy surfacing electrode |
| US20060185908A1 (en) * | 2005-02-18 | 2006-08-24 | Smith International, Inc. | Layered hardfacing, durable hardfacing for drill bits |
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2021
- 2021-09-29 CN CN202111147058.5A patent/CN113862669A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2675322Y (en) * | 2004-02-03 | 2005-02-02 | 四川石油管理局成都总机械厂 | Double tube alloy surfacing electrode |
| US20060185908A1 (en) * | 2005-02-18 | 2006-08-24 | Smith International, Inc. | Layered hardfacing, durable hardfacing for drill bits |
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| 解珅: ""钢体PDC钻头表面强化工艺研究"", 《西部探矿工程》, no. 9, pages 80 - 81 * |
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