CN114734206A - Machining process of hot-rolling spring mandrel - Google Patents
Machining process of hot-rolling spring mandrel Download PDFInfo
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- CN114734206A CN114734206A CN202210388898.9A CN202210388898A CN114734206A CN 114734206 A CN114734206 A CN 114734206A CN 202210388898 A CN202210388898 A CN 202210388898A CN 114734206 A CN114734206 A CN 114734206A
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- 238000003754 machining Methods 0.000 title claims abstract description 35
- 238000005098 hot rolling Methods 0.000 title claims description 11
- 239000011248 coating agent Substances 0.000 claims abstract description 55
- 238000000576 coating method Methods 0.000 claims abstract description 55
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- 230000001680 brushing effect Effects 0.000 claims abstract description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims description 33
- 238000005496 tempering Methods 0.000 claims description 32
- 238000010791 quenching Methods 0.000 claims description 26
- 230000000171 quenching effect Effects 0.000 claims description 26
- 229910052782 aluminium Inorganic materials 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 13
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 238000002161 passivation Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000010891 electric arc Methods 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 8
- 239000002002 slurry Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052693 Europium Inorganic materials 0.000 claims description 4
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 4
- 229910052779 Neodymium Inorganic materials 0.000 claims description 4
- 229910052773 Promethium Inorganic materials 0.000 claims description 4
- 229910052772 Samarium Inorganic materials 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000003518 caustics Substances 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000010941 cobalt Substances 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 4
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 claims description 4
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 claims description 4
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims description 4
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- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 239000010955 niobium Substances 0.000 claims description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 238000005554 pickling Methods 0.000 claims description 4
- VQMWBBYLQSCNPO-UHFFFAOYSA-N promethium atom Chemical compound [Pm] VQMWBBYLQSCNPO-UHFFFAOYSA-N 0.000 claims description 4
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 239000010937 tungsten Substances 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000011253 protective coating Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000007514 turning Methods 0.000 description 3
- 239000006255 coating slurry Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Classifications
-
- 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
-
- 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
- Y02P10/20—Recycling
Abstract
The invention relates to the technical field of spring mandrel processing, in particular to a processing technology of a hot-rolled spring mandrel, which comprises the following steps: s1, feeding the blank into a cold header for cold heading to obtain a rough blank, and feeding the rough blank into a numerical control lathe for rough machining to obtain a mandrel rough blank; s2, carrying out heat treatment on the primary mandrel blank, and after the heat treatment is finished, sending the primary mandrel blank into the numerical control lathe again for secondary finish machining; s3, after the secondary finish machining is finished, taking out the primary mandrel blank, performing surface coating treatment on the primary mandrel blank, and after the coating treatment is finished, brushing anti-rust oil on the primary mandrel blank to obtain a finished hot-rolled spring mandrel product.
Description
Technical Field
The invention relates to the technical field of spring mandrel processing, in particular to a processing technology of a hot-rolling spring mandrel.
Background
At present, the known hot-rolled springs are formed by winding with cores, and the springs are heated and then are wound and produced on an automatic spring coiling machine according to a core shaft with a selected size and a selected procedure.
The current dabber has a short service life, cannot be processed and produced for a long time, and leads to the need of enterprises to frequently change the spring dabber, and the cost is higher.
In summary, the present invention provides a process for manufacturing a hot-rolled spring mandrel to improve this problem.
Disclosure of Invention
The invention aims to provide a processing technology of a hot-rolling spring mandrel, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a processing technology of a hot-rolling spring mandrel comprises the following steps:
s1, feeding the blank into a cold header for cold heading to obtain a rough blank, and feeding the rough blank into a numerical control lathe for rough machining to obtain a mandrel rough blank;
s2, carrying out heat treatment on the primary mandrel blank, and after the heat treatment is finished, sending the primary mandrel blank into the numerical control lathe again for secondary finish machining;
and S3, after the secondary finish machining is finished, taking out the primary mandrel blank, carrying out surface coating treatment on the primary mandrel blank, and after the coating treatment is finished, brushing anti-rust oil on the primary mandrel blank to obtain a finished hot-rolled spring mandrel product.
In a preferred embodiment of the present invention, the rough machining in S1 requires that the rough blank is subjected to profile turning according to the production size, and the outer diameter of the rough blank is ground by 0.2mm to 0.5 mm.
As a preferable scheme of the present invention, the specific operation steps of the heat treatment in S2 are:
s11, uniformly coating the outer wall of the primary mandrel blank with the slurry, putting the primary mandrel blank coated with the slurry into a tempering furnace for quenching treatment, taking the primary mandrel blank out of the quenching furnace after the quenching treatment is finished, and cooling the primary mandrel blank by using quenching oil;
and S12, after the mandrel primary blank is cooled, feeding the mandrel primary blank into a tempering furnace for tempering treatment, and after the tempering treatment is finished, naturally cooling the mandrel primary blank to the normal temperature.
As a preferred embodiment of the present invention, the secondary finishing in S2 includes: the end face of the primary mandrel blank is used as a reference, the excircle and the length of the primary mandrel blank are polished according to the production size, and after polishing is finished, the primary mandrel blank is polished by using a polishing machine, so that the roughness of the outer wall of the primary mandrel blank meets the production requirement and the primary mandrel blank is chamfered.
As a preferable embodiment of the present invention, the surface plating treatment in S3 includes:
s21, removing oil and impurities from the mandrel blank by using an oil remover, washing the mandrel blank for 3.5-5 min by using deionized water, cleaning the oil remover, sending the mandrel blank into an acid pickling passivation solution, soaking for 12-15 min at normal temperature, washing the acid passivation solution remained on the surface of the mandrel blank for 3.5-5 min by using the deionized water again, neutralizing the passivation solution remained on the surface of the mandrel blank by using a caustic soda flake solution for 1.5min, washing the caustic flake remained on the surface of the mandrel blank for 3.5-5 min by using the deionized water, and then sending the mandrel blank into an oven for drying;
and S22, spraying a protective coating on the outer wall of the primary mandrel blank by adopting a supersonic electric arc spraying method, pre-oxidizing the surface of the sprayed coating by using oxyacetylene flame after the spraying is finished, and coating a wear-resistant metal coating on the outer surface of the pre-oxidized sprayed coating.
In a preferable embodiment of the invention, the quenching temperature in the step S11 is 590-520 ℃, and the hardness of the mandrel blank after quenching is HRC 52-HRC 57.
As a preferable scheme of the invention, the specific operation steps of the tempering treatment in the S11 are that the tempering temperature is set to 510-528 ℃, the temperature is kept for 120min after the tempering temperature reaches the temperature, when the hardness of the mandrel primary blank reaches HRC 49-HRC 53, the tempering temperature is increased to 530-550 ℃, and the temperature is kept for 150min after the temperature reaches the temperature.
In a preferred embodiment of the present invention, the oven temperature in S21 is 150 to 180 ℃, and the concentration of the caustic soda flake solution is 5%.
As a preferable scheme of the invention, the specific operation steps of the spraying treatment are firstly spraying a 1Cr13 coating on the outer wall of the mandrel primary blank by adopting a supersonic electric arc spraying method, wherein the spraying thickness of the 1Cr13 coating is 30-40 mu m, and then spraying a pure aluminum coating by adopting the supersonic electric arc spraying method, wherein the spraying thickness of the pure aluminum coating is 160-170 mu m.
As a preferable scheme of the invention, the wear-resistant metal coating comprises the following components in percentage by mass: 0.16-0.18% of carbon, 2.8-3.0% of chromium, 5.6-5.7% of titanium, 0.9-1.4% of vanadium, 1.3-1.5% of cobalt, 0.15-0.18% of niobium, 1.5-1.8% of tungsten, 1.8-2.1% of zinc, 1.9-2.3% of samarium, 0.7-1.1% of neodymium, 0.26-0.28% of promethium, 0.01-0.015% of europium, 0.51-0.55% of gadolinium, 2.5-2.8% of aluminum and the balance of iron.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, in the quenching process of heat treatment, a tempering furnace is adopted for quenching firstly, so that the occurrence of abrasion cracks of the primary mandrel blank can be reduced, the hardness of the primary mandrel blank is increased, the wear resistance of the primary mandrel blank is improved, and the probability of cracks possibly caused by rapid heating is reduced Pure aluminum coating and wear-resisting metal coating, through the cooperation of 1Cr13 coating and pure aluminum coating, and carry out the pre-oxidation to pure aluminum coating, the corrosion resisting property of dabber primary stock has been improved greatly, and wear and tear takes place for the oxide film that antifriction metal coating can effectively prevent pure aluminum coating production in use, make pure aluminum coating can provide anticorrosive protection for a long time, can play better guard action to the dabber primary stock, make the spring dabber finished product that produces have longer life.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The invention provides a technical scheme that:
a processing technology of a hot-rolling spring mandrel comprises the following steps:
s1, feeding the blank into a cold header for cold heading to obtain a rough blank, and feeding the rough blank into a numerical control lathe for rough machining to obtain a mandrel rough blank;
s2, carrying out heat treatment on the primary mandrel blank, and after the heat treatment is finished, sending the primary mandrel blank into the numerical control lathe again for secondary finish machining;
and S3, after the secondary finish machining is finished, taking out the primary mandrel blank, carrying out surface coating treatment on the primary mandrel blank, and after the coating treatment is finished, brushing anti-rust oil on the primary mandrel blank to obtain a finished hot-rolled spring mandrel product.
Further, the rough machining in the step S1 requires that the rough blank is subjected to profile turning according to the production size, and the external circle diameter of the rough blank is respectively subjected to grinding amount of 0.2 mm-0.5 mm.
Further, the specific operation steps of the heat treatment in S2 are:
s11, uniformly coating slurry on the outer wall of the primary mandrel blank, putting the primary mandrel blank coated with the slurry into a tempering furnace for quenching treatment, taking the primary mandrel blank out of the quenching furnace after the quenching treatment is finished, and cooling the primary mandrel blank by using quenching oil;
and S12, after the mandrel primary blank is cooled, feeding the mandrel primary blank into a tempering furnace for tempering treatment, and after the tempering treatment is finished, naturally cooling the mandrel primary blank to the normal temperature.
Further, the secondary finishing operation in S2 includes: the end face of the primary mandrel blank is used as a reference, the excircle and the length of the primary mandrel blank are polished according to the production size, and after polishing is finished, the primary mandrel blank is polished by using a polishing machine, so that the roughness of the outer wall of the primary mandrel blank meets the production requirement and the primary mandrel blank is chamfered.
Further, the surface plating treatment in S3 includes:
s21, removing oil and impurities from the mandrel blank by using an oil removing agent, washing the mandrel blank for 3.5-5 min by using deionized water, cleaning the oil removing agent, sending the mandrel blank into an acid pickling passivation solution, soaking for 12-15 min at normal temperature, washing the acid passivation solution remained on the surface of the mandrel blank for 3.5-5 min by using the deionized water again, neutralizing the passivation solution remained on the surface of the mandrel blank by using a caustic soda solution for 1.5min, washing the caustic soda residue on the surface of the mandrel blank for 3.5-5 min by using the deionized water, and then sending the mandrel blank into an oven to be dried;
and S22, spraying a protective coating on the outer wall of the primary mandrel blank by adopting a supersonic electric arc spraying method, pre-oxidizing the surface of the sprayed coating by using oxyacetylene flame after the spraying is finished, and coating a wear-resistant metal coating on the outer surface of the pre-oxidized sprayed coating.
Further, the quenching temperature in the S11 is 590-520 ℃, and the hardness of the primary mandrel blank after quenching is HRC 52-HRC 57.
Further, the specific operation steps of the tempering treatment in the step S11 are that the tempering temperature is set to 510-528 ℃, the temperature is preserved for 120min after the tempering temperature reaches the temperature, when the hardness of the mandrel primary blank reaches HRC 49-HRC 53, the tempering temperature is raised to 530-550 ℃, and the temperature is preserved for 150min after the tempering temperature reaches the temperature.
Further, the temperature of the oven in the S21 is 150-180 ℃, and the concentration of the caustic soda flake solution is 5%.
Further, the specific operation steps of the spraying treatment are that a 1Cr13 coating is sprayed on the outer wall of the primary mandrel blank by adopting a supersonic speed electric arc spraying method, the spraying thickness of the 1Cr13 coating is 30-40 mu m, and then a pure aluminum coating is sprayed by adopting the supersonic speed electric arc, and the spraying thickness of the pure aluminum coating is 160-170 mu m.
Further, the wear-resistant metal coating comprises the following components in percentage by mass: 0.16 to 0.18% of carbon, 2.8 to 3.0% of chromium, 5.6 to 5.7% of titanium, 0.9 to 1.4% of vanadium, 1.3 to 1.5% of cobalt, 0.15 to 0.18% of niobium, 1.5 to 1.8% of tungsten, 1.8 to 2.1% of zinc, 1.9 to 2.3% of samarium, 0.7 to 1.1% of neodymium, 0.26 to 0.28% of promethium, 0.01 to 0.015% of europium, 0.51 to 0.55% of gadolinium, 2.5 to 2.8% of aluminum, and the balance of iron.
The specific implementation case is as follows:
feeding the blank into a cold header for cold heading to obtain a rough blank, feeding the rough blank into a numerical control lathe for rough machining, turning the appearance of the rough blank according to the production size, and respectively putting the grinding quantity of 0.5mm on the excircle diameter of the rough blank to obtain a mandrel rough blank;
uniformly coating slurry on the outer wall of the primary mandrel blank, putting the primary mandrel blank coated with the slurry into a tempering furnace for quenching treatment, wherein the quenching temperature is 520 ℃, the hardness of the primary mandrel blank after quenching is HRC52, taking the primary mandrel blank out of the quenching furnace after quenching treatment is finished, cooling by using quenching oil, sending the primary mandrel blank into a tempering furnace after the primary mandrel blank is cooled, setting the tempering temperature to 528 ℃, preserving the heat for 120min after the temperature is reached, when the hardness of the mandrel primary blank reaches HRC53, raising the tempering temperature to 550 ℃, keeping the temperature for 150min after the temperature is reached, naturally cooling the mandrel primary blank to normal temperature after the tempering treatment is finished, feeding the mandrel primary blank into the numerical control lathe again, grinding the excircle and length of the primary mandrel blank according to the production size by taking the end face of the primary mandrel blank as a reference, after grinding is finished, polishing the primary mandrel blank by using a polishing machine to ensure that the roughness of the outer wall of the primary mandrel blank meets the production requirement and chamfering the primary mandrel blank;
after secondary fine machining is finished, taking out the mandrel blank, removing oil and impurities from the mandrel blank by using an oil removing agent, washing the mandrel blank for 5min by using deionized water, cleaning the oil removing agent, sending the mandrel blank into an acid pickling passivation solution, soaking for 12min at normal temperature, washing acid passivation solution remained on the surface of the mandrel blank for 3.5min by using the deionized water again, neutralizing the passivation solution remained on the surface of the mandrel blank by using a caustic soda flake solution, wherein the concentration of the caustic flake solution is 5%, the neutralization time is 1.5min, washing the caustic flake remained on the surface of the mandrel blank by using the deionized water, the washing time is 5min, then sending the mandrel blank into an oven for drying, and the temperature of the oven is 180 ℃;
firstly, spraying a 1Cr13 coating on the outer wall of a mandrel primary blank by adopting a supersonic electric arc spraying method, wherein the spraying thickness of the 1Cr13 coating is 30 mu m, then spraying a pure aluminum coating by adopting the supersonic electric arc spraying method, the spraying thickness of the pure aluminum coating is 160 mu m, pre-oxidizing the surface of the sprayed coating by using oxyacetylene flame after the spraying is finished, and coating a friction-resistant metal coating on the outer surface of the pre-oxidized sprayed coating, wherein the friction-resistant metal coating comprises the following components in percentage by mass: 0.18% of carbon, 3.0% of chromium, 5.7% of titanium, 1.4% of vanadium, 1.5% of cobalt, 0.18% of niobium, 1.8% of tungsten, 2.1% of zinc, 2.3% of samarium, 1.1% of neodymium, 0.28% of promethium, 0.015% of europium, 0.55% of gadolinium, 2.8% of aluminum and the balance of iron, and after the treatment is finished, coating antirust oil on the primary mandrel blank to obtain a finished hot-coil spring mandrel.
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 (10)
1. A processing technology of a hot-rolling spring mandrel is characterized by comprising the following steps:
s1, feeding the blank into a cold header for cold heading to obtain a rough blank, and feeding the rough blank into a numerical control lathe for rough machining to obtain a mandrel rough blank;
s2, carrying out heat treatment on the primary mandrel blank, and after the heat treatment is finished, sending the primary mandrel blank into the numerical control lathe again for secondary finish machining;
and S3, after the secondary finish machining is finished, taking out the primary mandrel blank, carrying out surface coating treatment on the primary mandrel blank, and after the coating treatment is finished, brushing anti-rust oil on the primary mandrel blank to obtain a finished hot-rolled spring mandrel product.
2. The machining process of the hot-rolled spring mandrel as claimed in claim 1, wherein the machining process comprises the following steps: and the rough machining in the S1 requires that the rough blank is turned according to the production size, and the external diameter of the rough blank is respectively set with the grinding amount of 0.2 mm-0.5 mm.
3. The machining process of the hot-rolled spring mandrel as claimed in claim 1, wherein the machining process comprises the following steps: the specific operation steps of the heat treatment in the step S2 are as follows:
s11, uniformly coating the outer wall of the primary mandrel blank with the slurry, putting the primary mandrel blank coated with the slurry into a tempering furnace for quenching treatment, taking the primary mandrel blank out of the quenching furnace after the quenching treatment is finished, and cooling the primary mandrel blank by using quenching oil;
and S12, after the mandrel primary blank is cooled, feeding the mandrel primary blank into a tempering furnace for tempering treatment, and after the tempering treatment is finished, naturally cooling the mandrel primary blank to the normal temperature.
4. The machining process of the hot-rolled spring mandrel as claimed in claim 1, wherein the machining process comprises the following steps: the specific operation steps of secondary finishing in the step S2 are as follows: the end face of the primary mandrel blank is used as a reference, the excircle and the length of the primary mandrel blank are polished according to the production size, and after polishing is finished, the primary mandrel blank is polished by using a polishing machine, so that the roughness of the outer wall of the primary mandrel blank meets the production requirement and the primary mandrel blank is chamfered.
5. The machining process of the hot-rolled spring mandrel as claimed in claim 1, wherein the machining process comprises the following steps: the specific operation steps of the surface plating treatment in the step S3 are as follows:
s21, removing oil and impurities from the mandrel blank by using an oil remover, washing the mandrel blank for 3.5-5 min by using deionized water, cleaning the oil remover, sending the mandrel blank into an acid pickling passivation solution, soaking for 12-15 min at normal temperature, washing the acid passivation solution remained on the surface of the mandrel blank for 3.5-5 min by using the deionized water again, neutralizing the passivation solution remained on the surface of the mandrel blank by using a caustic soda flake solution for 1.5min, washing the caustic flake remained on the surface of the mandrel blank for 3.5-5 min by using the deionized water, and then sending the mandrel blank into an oven for drying;
and S22, spraying a protective coating on the outer wall of the primary mandrel blank by adopting a supersonic electric arc spraying method, pre-oxidizing the surface of the sprayed coating by using oxyacetylene flame after the spraying is finished, and coating a wear-resistant metal coating on the outer surface of the pre-oxidized sprayed coating.
6. The machining process of the hot-rolling spring mandrel as claimed in claim 3, wherein the machining process comprises the following steps: the quenching temperature in the S11 is 590-520 ℃, and the hardness of the mandrel primary blank after quenching is HRC 52-HRC 57.
7. The machining process of the hot-rolling spring mandrel as claimed in claim 3, wherein the machining process comprises the following steps: the specific operation steps of the tempering treatment in the S11 are that the tempering temperature is set to 510-528 ℃, the temperature is kept for 120min after the tempering temperature reaches the temperature, when the hardness of the mandrel primary blank reaches HRC 49-HRC 53, the tempering temperature is increased to 530-550 ℃, and the temperature is kept for 150min after the tempering temperature reaches the temperature.
8. The process for manufacturing a hot-rolled spring mandrel as claimed in claim 5, wherein: the temperature of the oven in the S21 is 150-180 ℃, and the concentration of the caustic soda flake solution is 5%.
9. The machining process of the hot-rolling spring mandrel as claimed in claim 5, wherein the machining process comprises the following steps: the specific operation steps of the spraying treatment comprise firstly spraying a 1Cr13 coating on the outer wall of the primary mandrel blank by adopting a supersonic speed electric arc spraying method, wherein the spraying thickness of the 1Cr13 coating is 30-40 mu m, and then spraying a pure aluminum coating by adopting a supersonic speed electric arc, wherein the spraying thickness of the pure aluminum coating is 160-170 mu m.
10. The machining process of the hot-rolling spring mandrel as claimed in claim 5, wherein the machining process comprises the following steps:
the friction-resistant metal coating comprises the following components in percentage by mass: 0.16 to 0.18% of carbon, 2.8 to 3.0% of chromium, 5.6 to 5.7% of titanium, 0.9 to 1.4% of vanadium, 1.3 to 1.5% of cobalt, 0.15 to 0.18% of niobium, 1.5 to 1.8% of tungsten, 1.8 to 2.1% of zinc, 1.9 to 2.3% of samarium, 0.7 to 1.1% of neodymium, 0.26 to 0.28% of promethium, 0.01 to 0.015% of europium, 0.51 to 0.55% of gadolinium, 2.5 to 2.8% of aluminum, and the balance of iron.
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| JP2000240669A (en) * | 1999-02-18 | 2000-09-05 | Ntn Corp | Power transmission shaft |
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| CN111774822A (en) * | 2020-08-13 | 2020-10-16 | 无锡金峰园弹簧制造有限公司 | Machining process of hot-rolling spring mandrel |
| CN112218732A (en) * | 2018-09-28 | 2021-01-12 | 日进制钢株式会社 | Hollow drive shaft using upsetting method and method for manufacturing same |
| CN112692524A (en) * | 2021-01-08 | 2021-04-23 | 浙江汇丰汽车零部件股份有限公司 | Guide pin production process |
| CN112792515A (en) * | 2021-01-26 | 2021-05-14 | 宁波恒源轴业有限公司 | Shaft core processing technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000240669A (en) * | 1999-02-18 | 2000-09-05 | Ntn Corp | Power transmission shaft |
| CN106756546A (en) * | 2016-12-12 | 2017-05-31 | 苏州富艾姆工业设备有限公司 | A kind of processing technology of endurance compression spring |
| CN112218732A (en) * | 2018-09-28 | 2021-01-12 | 日进制钢株式会社 | Hollow drive shaft using upsetting method and method for manufacturing same |
| CN111774822A (en) * | 2020-08-13 | 2020-10-16 | 无锡金峰园弹簧制造有限公司 | Machining process of hot-rolling spring mandrel |
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Application publication date: 20220712 |