CN114570890A - Processing technology of fatigue-resistant ultrahigh-hardness induction quenching cylinder sleeve - Google Patents
Processing technology of fatigue-resistant ultrahigh-hardness induction quenching cylinder sleeve Download PDFInfo
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- 238000010791 quenching Methods 0.000 title claims abstract description 86
- 230000000171 quenching effect Effects 0.000 title claims abstract description 86
- 230000006698 induction Effects 0.000 title claims abstract description 23
- 238000005516 engineering process Methods 0.000 title claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 239000011247 coating layer Substances 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 6
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 25
- 238000005422 blasting Methods 0.000 claims description 20
- 238000000227 grinding Methods 0.000 claims description 15
- 238000005496 tempering Methods 0.000 claims description 15
- 238000005266 casting Methods 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 10
- 238000000137 annealing Methods 0.000 claims description 5
- 229910001566 austenite Inorganic materials 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 11
- 239000010959 steel Substances 0.000 abstract description 11
- 238000005520 cutting process Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000012797 qualification Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 3
- 238000004321 preservation Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000007493 shaping process Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/083—Deburring
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- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- 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
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses a processing technology of a fatigue-resistant ultra-high hardness induction quenching cylinder sleeve, which comprises the following steps of S1: the invention discloses a quenching process, which comprises the steps of firstly placing a high-temperature-resistant sealing ring between a main shaft flange and a die body, then connecting the main shaft flange and the die body by using bolts and nuts, installing a shroud ring, a flyweight bracket and a flyweight at the front end of the die body, and spraying a coating layer in an inner cavity of the die. This tired super high rigidity induction hardening cylinder jacket processing technology, through using the mould body, form the cylinder jacket blank at the mould body behind the pouring molten iron, forming mode through the mould pouring, the seamless steel pipe of the steel of production in advance qualification has been avoided, cause the waste of steel pipe material when also having avoided the cutting simultaneously, the metal piece that still can produce a large amount of splashes in the cutting process has been avoided simultaneously, safety scheduling problem inadequately, use through the cooperation of cooling mechanism and peening machine, the efficiency of cylinder jacket flash removed has been promoted greatly, the effect of flash removed has also been promoted simultaneously, therefore, the practicality is very strong.
Description
Technical Field
The invention relates to the technical field of quenching processing, in particular to a processing technology of a fatigue-resistant ultra-high hardness induction quenching cylinder sleeve.
Background
The cylinder sleeve is a cylindrical part, is placed in the cylinder body hole of machine body, and is tightly pressed and fixed by cylinder cover, and the piston can make reciprocating motion in its internal hole, and its exterior is cooled by cooling water.
The existing cylinder sleeve is manufactured by selecting a seamless steel pipe meeting the pipe diameter requirement as a blank and cutting the seamless steel pipe to the length required by a workpiece, and the existing cylinder sleeve is manufactured by the method.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a processing technology of a fatigue-resistant ultra-high hardness induction quenching cylinder sleeve, which solves the problems that the existing cylinder sleeve processing and manufacturing technology needs to produce a steel seamless steel pipe meeting the conditions in advance, the waste of steel pipe materials is easily caused during cutting, a large amount of splashed metal scraps are generated during cutting, the safety is not high enough, and the existing cylinder sleeve deburring means has low efficiency and poor effect.
In order to achieve the purpose, the invention is realized by the following technical scheme: a processing technology of a fatigue-resistant ultra-high hardness induction quenching cylinder sleeve specifically comprises the following steps: s1, molding: firstly, placing a high-temperature-resistant sealing ring between a main shaft flange plate and a mould body, then connecting the high-temperature-resistant sealing ring with a bolt and a nut, mounting a shroud ring, a flyweight bracket and a flyweight at the front end of the mould body, and spraying a coating layer in an inner cavity of the mould;
s2, pouring: starting a casting machine, casting molten iron, rotating a mold to form a cylinder sleeve, stopping the machine when the temperature of the cylinder sleeve is 950 ℃ plus 1000 ℃, opening a blank cap, and pulling out the cylinder sleeve by a mold pulling tool;
s3, deburring: rapidly cooling the surface of the cylinder sleeve by using a cooling mechanism to rapidly embrittle burrs on the surface of the cylinder sleeve, then enabling a jet orifice of a shot blasting machine spray gun to be opposite to the surface of the cylinder sleeve by using a shot blasting machine, forming an indefinite-point shot blasting shot by the shot blasting machine spray gun, and cleaning the embrittled burrs to form a finished cylinder sleeve;
s4, quenching: selecting a matched quenching inductor according to the diameter of an inner hole of a cylinder sleeve and the width of a hardening layer, controlling the radial clearance between the quenching inductor and the inner hole of the cylinder sleeve to be 2.5-5.0mm, controlling the width of the inductor to be 2-3.5mm smaller than the width of the hardening layer, heating a workpiece in a heating furnace to 400 ℃ and preserving heat for 20 minutes during quenching treatment, then heating to 880-900 ℃ at the highest heating speed of not higher than 300 ℃/h and preserving heat for 60 minutes, then discharging the workpiece out of the furnace for quenching, controlling the temperature of the quenching liquid to be 50-60 ℃, controlling the lowest temperature of the workpiece to be 800 ℃ before immersing the quenching liquid, controlling the quenching time to be 38-45 seconds, and enabling the quenching liquid not to circulate during quenching; during tempering treatment, the quenched workpiece is placed back into a heating furnace, the temperature is raised to 600-610 ℃ at the highest temperature rise speed of not higher than 300 ℃/h, and the temperature is preserved for 10 minutes and then the workpiece is taken out of the furnace for air cooling;
s5, fine grinding: finely turning the outer circle and two end faces to ensure that the precision errors of the outer circle diameter and the length direction of the workpiece are +/-0.12 mm; finely grinding the outer circle to ensure that the diameter precision error of the outer circle is-0.013- +0.010 mm; and (3) finely grinding the inner hole to ensure that the precision error of the inner hole is + 0.010-0.0.035 mm.
Preferably, the quenching and tempering treatment in the S4 process ensures that the tensile strength of the workpiece is more than or equal to 900MPa, the hardness is less than or equal to HRC30, the yield strength is more than or equal to 900MPa and the index G of the microscopic grain size grade of austenite grains is less than or equal to 5 under the 0.2% deviation.
Preferably, the heating power of the quenching inductor in the S4 is 82-88KW, the frequency is 75-100KHz, and the moving speed is 3-5 mm/S.
Preferably, when the inner hole is finely ground in S5, the workpiece is connected to the honing machine bed by using a honing fixture with a rubber sleeve, a rubber bump corresponding to the water seal groove of the workpiece is arranged on the inner wall of the rubber sleeve, and the lower end of the rubber bump corresponds to a boss at the lower end of the outer circular surface of the workpiece.
Preferably, the temperature of the cooling mechanism in the step S3 is controlled to be-18 to-10 ℃, and the cooling time lasts for 3 to 5 min.
Preferably, in S1, the blank cap is mounted on the die body through a flyweight, the flyweight is mounted on a flyweight bracket through a flyweight shaft, and the flyweight bracket is mounted on the die body through a flyweight hoop.
Preferably, in S1, the spindle flange plate is mounted on the die body through bolts, nuts and elastic washers.
Preferably, the model of the quenching liquid in the S4 is Houghton AQ371, the concentration is 6% -9%, and the temperature of the quenching liquid is maintained at 28-38 ℃; and (4) after induction quenching, tempering in an annealing furnace, and keeping the temperature at 160-170 ℃ for 3 hours.
Advantageous effects
The invention provides a processing technology of a fatigue-resistant ultra-high hardness induction quenching cylinder sleeve. Compared with the prior art, the method has the following beneficial effects: this tired super high rigidity induction hardening cylinder jacket processing technology, through using the mould body, form the cylinder jacket blank at the mould body behind the pouring molten iron, the shaping mode through the mould pouring, the seamless steel pipe of the steel of production in advance qualification has been avoided, cause the waste of steel pipe material when also having avoided the cutting simultaneously, the metal piece that still can produce a large amount of splashes in the cutting process has been avoided simultaneously, safety scheduling problem inadequately, use through the cooperation of cooling mechanism and peening machine, the efficiency of cylinder jacket deburring has been promoted greatly, the effect of deburring has also been promoted simultaneously, therefore, the practicability is very strong.
Drawings
FIG. 1 is a process flow diagram 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 present invention provides three technical solutions: a processing technology of a fatigue-resistant ultrahigh-hardness induction quenching cylinder sleeve specifically comprises the following embodiments:
example 1
S1, molding: firstly, placing a high-temperature-resistant sealing ring between a main shaft flange plate and a mould body, then connecting the high-temperature-resistant sealing ring with a bolt and a nut, mounting a shroud ring, a flyweight bracket and a flyweight at the front end of the mould body, and spraying a coating layer in an inner cavity of the mould;
s2, pouring: starting a casting machine, casting molten iron, rotating a mold to form a cylinder sleeve, stopping the machine when the temperature of the cylinder sleeve is 950 ℃, opening a blank cap, and drawing out the cylinder sleeve by a drawing tool;
s3, deburring: rapidly cooling the surface of the cylinder sleeve by using a cooling mechanism to rapidly embrittle burrs on the surface of the cylinder sleeve, then enabling a jet orifice of a shot blasting machine spray gun to be opposite to the surface of the cylinder sleeve by using a shot blasting machine, forming an indefinite-point shot blasting shot by the shot blasting machine spray gun, and cleaning the embrittled burrs to form a finished cylinder sleeve;
s4, quenching: selecting a matched quenching inductor according to the diameter of an inner hole of a cylinder sleeve and the width of a hardening layer, controlling the radial clearance between the quenching inductor and the inner hole of the cylinder sleeve to be 2.5mm, controlling the width of the inductor to be 2mm less than the width of the hardening layer, heating a workpiece in a heating furnace to 400 ℃ and preserving heat for 20 minutes during quenching treatment, heating to 880 ℃ at the highest heating speed of not higher than 300 ℃/h and preserving heat for 60 minutes, discharging from the furnace for quenching, controlling the temperature of quenching liquid to be 50 ℃, controlling the lowest temperature of the workpiece to be 800 ℃ before immersing in the quenching liquid, controlling the quenching time to be 38 seconds, and not circulating the quenching liquid during quenching; during tempering treatment, the quenched workpiece is placed back into a heating furnace, the temperature is raised to 600 ℃ at the highest temperature rise speed of not higher than 300 ℃/h, the temperature is preserved for 10 minutes, and then the workpiece is taken out of the furnace and air-cooled;
s5, fine grinding: finely turning the outer circle and two end faces to ensure that the precision errors of the outer circle diameter and the length direction of the workpiece are +/-0.12 mm; finely grinding the outer circle to ensure that the diameter precision error of the outer circle is-0.013 mm; and (5) finely grinding the inner hole to ensure that the precision error of the inner hole is +0.010 mm.
In the invention, quenching and tempering are carried out in S4, so that the tensile strength of a workpiece is more than or equal to 900MPa, the hardness is less than or equal to HRC30, the yield strength is more than or equal to 900MPa under 0.2% deviation, and the index G of the microscopic grain size level of austenite grains is less than or equal to 5.
In the invention, the heating power of the quenching inductor in S4 is 82KW, the frequency is 75KHz, and the moving speed is 3 mm/S.
In the invention, when the inner hole is finely ground in S5, a honing clamp with a rubber sleeve is adopted to connect the workpiece to a honing machine bed, the inner wall of the rubber sleeve is provided with a rubber bump corresponding to the water seal groove part of the workpiece, and the lower end of the rubber bump corresponds to a boss at the lower end of the outer circular surface of the workpiece.
In the invention, the temperature of the cooling mechanism in S3 is controlled at-18 ℃, and the cooling time lasts for 3 min.
In the invention, the blank cap in S1 is arranged on the die body through a flyweight, the flyweight is arranged on a flyweight bracket through a flyweight shaft, and the flyweight bracket is arranged on the die body through a flyweight hoop.
In the invention, the spindle flange disc in S1 is arranged on the die body through bolts, nuts and elastic pads.
In the invention, the model of the quenching liquid in S4 is Houghton AQ371, the concentration is 6%, and the temperature of the quenching liquid is maintained at 28 ℃; and (4) tempering in an annealing furnace after induction quenching, and keeping the temperature at 160 ℃ for 3 hours.
Example 2
S1, molding: firstly, placing a high-temperature-resistant sealing ring between a main shaft flange plate and a mould body, then connecting the high-temperature-resistant sealing ring with a bolt and a nut, mounting a shroud ring, a flyweight bracket and a flyweight at the front end of the mould body, and spraying a coating layer in an inner cavity of the mould;
s2, pouring: starting a casting machine, casting molten iron, rotating a mold to form a cylinder sleeve, stopping the machine when the temperature of the cylinder sleeve is 1000 ℃, opening a blank cap, and drawing out the cylinder sleeve by a drawing tool;
s3, deburring: rapidly cooling the surface of the cylinder sleeve by using a cooling mechanism to rapidly embrittle burrs on the surface of the cylinder sleeve, then enabling a jet orifice of a shot blasting machine spray gun to be opposite to the surface of the cylinder sleeve by using a shot blasting machine, forming an indefinite-point shot blasting shot by the shot blasting machine spray gun, and cleaning the embrittled burrs to form a finished cylinder sleeve;
s4, quenching: selecting a matched quenching inductor according to the diameter of an inner hole of a cylinder sleeve and the width of a hardening layer, controlling the radial clearance between the quenching inductor and the inner hole of the cylinder sleeve to be 5.0mm, wherein the width of the inductor is 3.5mm smaller than the width of the hardening layer, heating a workpiece in a heating furnace to 400 ℃ and preserving heat for 20 minutes during quenching treatment, then heating the workpiece to 900 ℃ at the highest heating speed of not higher than 300 ℃/h and preserving heat for 60 minutes, then discharging the workpiece out of the furnace for quenching, wherein the temperature of the quenching liquid is 60 ℃, the minimum temperature of the workpiece before being immersed in the quenching liquid is required to be 800 ℃, the quenching time is 45 seconds, and the quenching liquid is not circulated during quenching; during tempering treatment, the quenched workpiece is placed back into a heating furnace, the temperature is raised to 610 ℃ at the highest temperature raising speed of not higher than 300 ℃/h, and the temperature is preserved for 10 minutes, and then the workpiece is discharged from the furnace and cooled;
s5, fine grinding: finely turning the outer circle and two end faces to ensure that the precision errors of the outer circle diameter and the length direction of the workpiece are +/-0.12 mm; finely grinding the outer circle to enable the diameter precision error of the outer circle to be +0.010 mm; and finely grinding the inner hole to make the precision error of the inner hole 0.0.035 mm.
In the invention, quenching and tempering are carried out in S4, so that the tensile strength of a workpiece is more than or equal to 900MPa, the hardness is less than or equal to HRC30, the yield strength is more than or equal to 900MPa under 0.2% deviation, and the index G of the microscopic grain size level of austenite grains is less than or equal to 5.
In the invention, the heating power of the quenching inductor in S4 is 88KW, the frequency is 100KHz, and the moving speed is 5 mm/S.
In the invention, when the inner hole is finely ground in S5, a honing clamp with a rubber sleeve is adopted to connect the workpiece to a honing machine bed, the inner wall of the rubber sleeve is provided with a rubber bump corresponding to the water seal groove part of the workpiece, and the lower end of the rubber bump corresponds to a boss at the lower end of the outer circular surface of the workpiece.
In the invention, the temperature of the cooling mechanism in S3 is controlled at-10 ℃, and the cooling time lasts for 5 min.
In the invention, the blank cap in S1 is arranged on the die body through a flyweight, the flyweight is arranged on a flyweight bracket through a flyweight shaft, and the flyweight bracket is arranged on the die body through a flyweight hoop.
In the invention, the spindle flange disc in S1 is arranged on the die body through bolts, nuts and elastic pads.
In the invention, the model of the quenching liquid in S4 is Houghton AQ371, the concentration is 9%, and the temperature of the quenching liquid is maintained at 38 ℃; and (4) after induction quenching, tempering in an annealing furnace, and keeping the temperature at 170 ℃ for 3 hours.
Example 3
S1, molding: firstly, placing a high-temperature-resistant sealing ring between a main shaft flange plate and a mould body, then connecting the high-temperature-resistant sealing ring with a bolt and a nut, installing a hoop, a flyweight bracket and a flyweight at the front end of the mould body, and spraying a coating layer in an inner cavity of the mould;
s2, casting: starting a casting machine, casting molten iron, rotating a mold to form a cylinder sleeve, stopping the machine at 980 ℃, opening a blank cap, and pulling out the cylinder sleeve by a mold pulling tool;
s3, deburring: rapidly cooling the surface of the cylinder sleeve by using a cooling mechanism to rapidly embrittle burrs on the surface of the cylinder sleeve, then enabling a jet orifice of a shot blasting machine spray gun to be opposite to the surface of the cylinder sleeve by using a shot blasting machine, forming an indefinite-point shot blasting shot by the shot blasting machine spray gun, and cleaning the embrittled burrs to form a finished cylinder sleeve;
s4, quenching: selecting a matched quenching inductor according to the diameter of an inner hole of a cylinder sleeve and the width of a hardening layer, controlling the radial clearance between the quenching inductor and the inner hole of the cylinder sleeve to be 4mm, controlling the width of the inductor to be 3mm smaller than the width of the hardening layer, heating a workpiece in a heating furnace to 400 ℃ and preserving heat for 20 minutes during quenching treatment, heating the workpiece to 890 ℃ at the highest heating speed of no higher than 300 ℃/h and preserving heat for 60 minutes, discharging the workpiece out of the furnace for quenching, controlling the temperature of the quenching liquid to be 55 ℃, controlling the minimum temperature of the workpiece to be 800 ℃ before the workpiece is immersed in the quenching liquid, controlling the quenching time to be 40 seconds, and not circulating the quenching liquid during quenching; during tempering treatment, the quenched workpiece is placed back into a heating furnace, the temperature is raised to 605 ℃ at the highest temperature raising speed of not higher than 300 ℃/h, the temperature is kept for 10 minutes, and then the workpiece is discharged from the furnace and cooled;
s5, fine grinding: finely turning the outer circle and two end faces to ensure that the precision errors of the outer circle diameter and the length direction of the workpiece are +/-0.12 mm; finely grinding the outer circle to enable the diameter precision error of the outer circle to be +/-0.005 mm; and (5) finely grinding the inner hole to ensure that the precision error of the inner hole is +/-0.005 mm.
In the invention, quenching and tempering are carried out in S4, so that the tensile strength of a workpiece is more than or equal to 900MPa, the hardness is less than or equal to HRC30, the yield strength is more than or equal to 900MPa under 0.2% deviation, and the index G of the microscopic grain size level of austenite grains is less than or equal to 5.
In the invention, the heating power of the quenching inductor in S4 is 85KW, the frequency is 90KHz, and the moving speed is 4 mm/S.
In the invention, when the inner hole is finely ground in S5, a honing clamp with a rubber sleeve is adopted to connect the workpiece to a honing machine bed, the inner wall of the rubber sleeve is provided with a rubber bump corresponding to the water seal groove part of the workpiece, and the lower end of the rubber bump corresponds to a boss at the lower end of the outer circular surface of the workpiece.
In the invention, the temperature of the cooling mechanism in S3 is controlled at-15 ℃, and the cooling time lasts for 4 min.
In the invention, the blank cap in S1 is arranged on the die body through a flyweight, the flyweight is arranged on a flyweight bracket through a flyweight shaft, and the flyweight bracket is arranged on the die body through a flyweight hoop.
In the invention, the spindle flange disc in S1 is arranged on the die body through bolts, nuts and elastic pads.
In the invention, the model of the quenching liquid in S4 is Houghton AQ371, the concentration is 8%, and the temperature of the quenching liquid is maintained at 35 ℃; after induction quenching, tempering is carried out in an annealing furnace, the heat preservation temperature is 165 ℃, and the heat preservation time is 3 hours.
And those not described in detail in this specification are well within the skill of the art.
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 processing technology of a fatigue-resistant ultra-high hardness induction quenching cylinder sleeve is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, molding: firstly, placing a high-temperature-resistant sealing ring between a main shaft flange plate and a mould body, then connecting the high-temperature-resistant sealing ring with a bolt and a nut, mounting a shroud ring, a flyweight bracket and a flyweight at the front end of the mould body, and spraying a coating layer in an inner cavity of the mould;
s2, pouring: starting a casting machine, casting molten iron, rotating a mold to form a cylinder sleeve, stopping the machine when the temperature of the cylinder sleeve is 950 ℃ plus 1000 ℃, opening a blank cap, and pulling out the cylinder sleeve by a mold pulling tool;
s3, deburring: rapidly cooling the surface of the cylinder sleeve by using a cooling mechanism to rapidly embrittle burrs on the surface of the cylinder sleeve, then enabling a jet orifice of a shot blasting machine spray gun to be opposite to the surface of the cylinder sleeve by using a shot blasting machine, forming an indefinite-point shot blasting shot by the shot blasting machine spray gun, and cleaning the embrittled burrs to form a finished cylinder sleeve;
s4, quenching: selecting a matched quenching inductor according to the diameter of an inner hole of a cylinder sleeve and the width of a hardening layer, controlling the radial clearance between the quenching inductor and the inner hole of the cylinder sleeve to be 2.5-5.0mm, controlling the width of the inductor to be 2-3.5mm smaller than the width of the hardening layer, heating a workpiece in a heating furnace to 400 ℃ and preserving heat for 20 minutes during quenching treatment, then heating to 880-900 ℃ at the highest heating speed of not higher than 300 ℃/h and preserving heat for 60 minutes, then discharging the workpiece out of the furnace for quenching, controlling the temperature of the quenching liquid to be 50-60 ℃, controlling the lowest temperature of the workpiece to be 800 ℃ before immersing the quenching liquid, controlling the quenching time to be 38-45 seconds, and enabling the quenching liquid not to circulate during quenching; during tempering treatment, the quenched workpiece is placed back into a heating furnace, the temperature is raised to 600-610 ℃ at the highest temperature rise speed of not higher than 300 ℃/h, the temperature is preserved for 10 minutes, and then the workpiece is taken out of the furnace and cooled;
s5, fine grinding: finely turning the outer circle and two end faces to ensure that the precision errors of the outer circle diameter and the length direction of the workpiece are +/-0.12 mm; finely grinding the outer circle to ensure that the diameter precision error of the outer circle is-0.013- +0.010 mm; and (3) finely grinding the inner hole to ensure that the precision error of the inner hole is + 0.010-0.0.035 mm.
2. The processing technology of the fatigue-resistant ultra-high hardness induction hardening cylinder sleeve as claimed in claim 1, characterized in that: the quenching and tempering treatment in the S4 process ensures that the tensile strength of the workpiece is more than or equal to 900MPa, the hardness is less than or equal to HRC30, the yield strength is more than or equal to 900MPa under 0.2 percent deviation, and the index G of the microscopic grain size grade of austenite grains is less than or equal to 5.
3. The processing technology of the fatigue-resistant ultra-high hardness induction hardening cylinder sleeve as claimed in claim 1, characterized in that: the heating power of the quenching inductor in the S4 is 82-88KW, the frequency is 75-100KHz, and the moving speed is 3-5 mm/S.
4. The processing technology of the fatigue-resistant ultra-high hardness induction hardening cylinder sleeve as claimed in claim 1, characterized in that: and when the inner hole is finely ground in the S5, the workpiece is connected to a honing machine bed by adopting a honing fixture with a rubber sleeve, the inner wall of the rubber sleeve is provided with a rubber bump corresponding to the water seal groove part of the workpiece, and the lower end of the rubber bump corresponds to a boss at the lower end of the outer circular surface of the workpiece.
5. The processing technology of the fatigue-resistant ultra-high hardness induction hardening cylinder sleeve as claimed in claim 1, characterized in that: and the temperature of the cooling mechanism in the S3 is controlled to be-18 to-10 ℃, and the cooling time lasts for 3 to 5 min.
6. The processing technology of the fatigue-resistant ultra-high hardness induction hardening cylinder sleeve as claimed in claim 1, characterized in that: and the S1 intermediate blank cap is arranged on the die body through a flyweight, the flyweight is arranged on a flyweight bracket through a flyweight shaft, and the flyweight bracket is arranged on the die body through a flyweight hoop.
7. The processing technology of the fatigue-resistant ultra-high hardness induction hardening cylinder sleeve according to claim 1, characterized in that: and the spindle flange disc in the S1 is arranged on the die body through bolts, nuts and elastic washers.
8. The processing technology of the fatigue-resistant ultra-high hardness induction hardening cylinder sleeve as claimed in claim 1, characterized in that: the model of the quenching liquid in the S4 is Houghton AQ371, the concentration is 6-9%, and the temperature of the quenching liquid is maintained at 28-38 ℃; and (4) after induction quenching, tempering in an annealing furnace, and keeping the temperature at 160-170 ℃ for 3 hours.
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| CN202210201352.8A CN114570890A (en) | 2022-03-03 | 2022-03-03 | Processing technology of fatigue-resistant ultrahigh-hardness induction quenching cylinder sleeve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210201352.8A CN114570890A (en) | 2022-03-03 | 2022-03-03 | Processing technology of fatigue-resistant ultrahigh-hardness induction quenching cylinder sleeve |
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| CN202210201352.8A Withdrawn CN114570890A (en) | 2022-03-03 | 2022-03-03 | Processing technology of fatigue-resistant ultrahigh-hardness induction quenching cylinder sleeve |
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| CN (1) | CN114570890A (en) |
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| JPS5829565A (en) * | 1981-08-12 | 1983-02-21 | Morikawa Sangyo Kk | Production of small sized cylinder liner |
| CN201244674Y (en) * | 2008-08-25 | 2009-05-27 | 江苏爱吉斯海珠机械有限公司 | Heat radiating fin air-cooled type cylinder jacket casting machine |
| CN201291285Y (en) * | 2008-10-21 | 2009-08-19 | 洪泽县华晨机械有限公司 | No-asbestos pad cylinder liner casting die |
| CN102407314A (en) * | 2010-09-22 | 2012-04-11 | 韦斌 | Casting machine mould with air cavity instead of asbestos pad cylinder jacket |
| CN106001450A (en) * | 2016-06-30 | 2016-10-12 | 娄土岭 | Cylinder sleeve casting technology |
| CN108796369A (en) * | 2018-06-13 | 2018-11-13 | 中原内配集团安徽有限责任公司 | A kind of casting processing technology of automobile cylinder liner |
| CN111546014A (en) * | 2020-05-19 | 2020-08-18 | 河南中原吉凯恩气缸套有限公司 | Machining process of steel thin-wall induction quenching cylinder sleeve |
| CN112024632A (en) * | 2020-07-21 | 2020-12-04 | 湖北隐冠轴业有限公司 | One-step cold extrusion forming process for multi-shoulder stepped shaft of automobile |
| CN112725706A (en) * | 2020-12-22 | 2021-04-30 | 河南科技大学 | Steel cylinder sleeve material and preparation method of steel cylinder sleeve |
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2022
- 2022-03-03 CN CN202210201352.8A patent/CN114570890A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829565A (en) * | 1981-08-12 | 1983-02-21 | Morikawa Sangyo Kk | Production of small sized cylinder liner |
| CN201244674Y (en) * | 2008-08-25 | 2009-05-27 | 江苏爱吉斯海珠机械有限公司 | Heat radiating fin air-cooled type cylinder jacket casting machine |
| CN201291285Y (en) * | 2008-10-21 | 2009-08-19 | 洪泽县华晨机械有限公司 | No-asbestos pad cylinder liner casting die |
| CN102407314A (en) * | 2010-09-22 | 2012-04-11 | 韦斌 | Casting machine mould with air cavity instead of asbestos pad cylinder jacket |
| CN106001450A (en) * | 2016-06-30 | 2016-10-12 | 娄土岭 | Cylinder sleeve casting technology |
| CN108796369A (en) * | 2018-06-13 | 2018-11-13 | 中原内配集团安徽有限责任公司 | A kind of casting processing technology of automobile cylinder liner |
| CN111546014A (en) * | 2020-05-19 | 2020-08-18 | 河南中原吉凯恩气缸套有限公司 | Machining process of steel thin-wall induction quenching cylinder sleeve |
| CN112024632A (en) * | 2020-07-21 | 2020-12-04 | 湖北隐冠轴业有限公司 | One-step cold extrusion forming process for multi-shoulder stepped shaft of automobile |
| CN112725706A (en) * | 2020-12-22 | 2021-04-30 | 河南科技大学 | Steel cylinder sleeve material and preparation method of steel cylinder sleeve |
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