CN105855812A - 一种汽车变速器齿轮加工工艺 - Google Patents
一种汽车变速器齿轮加工工艺 Download PDFInfo
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- 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
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- 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
- C21D1/25—Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")
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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
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/32—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for gear wheels, worm wheels, or the like
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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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
- C23C8/22—Carburising of ferrous surfaces
Abstract
本发明公开了一种汽车变速器齿轮加工工艺,涉及汽车零件加工领域,包括如下步骤:(1)滚齿,(2)渗碳,(3)调质,(4)剃齿,(5)磨齿,该汽车变速器齿轮加工工艺采用了数控高速干切自动滚齿机加工出齿轮,提高了加工效率,且并不破坏齿轮内部组织结构。使用先等温退火,可使得齿轮在后面的渗碳处理中变形小,再渗碳处理的工艺,可以保障齿轮内部组织的均匀性,保障齿轮芯部韧性的同时,提高齿轮表面的硬度和耐磨性,增加变速器齿轮的使用寿命。
Description
技术领域
本发明涉及汽车零件加工领域,更具体地说,本发明涉及一种汽车变速器齿轮加工工艺。
背景技术
变速器是汽车传动系统的主要组成之一,是进行机械动力转换的机械或液压设备。汽车起步、怠速停车、低速或高速行驶、加速、减速、爬坡和倒车等都要求汽车的驱动力和车速能在相当大的范围内变化,而变速器齿轮是变速器实现变速的关键零件。目前的变速器齿轮加工工艺过于简单,无法满足在保障变速器齿轮芯部足够韧性的前提下,使齿轮表面具有足够的硬度,严重影响变速器的使用寿命。
发明内容
本发明所要解决的问题是提供一种汽车变速器齿轮加工工艺。
为了实现上述目的,本发明采取的技术方案为:一种汽车变速器齿轮加工工艺,其特征在于,该汽车变速器齿轮采用20Cr2Ni4A钢制造,其加工工艺步骤如下:
(1)滚齿:使用数控高速干切自动滚齿机加工出齿轮毛坯;
(2)渗碳:将加工好的齿轮毛坯放入退火炉中进行等温退火处理,再将齿轮毛坯放入可控井式炉中进行渗碳处理;
(3)调质:将渗碳之后的齿轮毛坯放入淬火炉中加热到920℃,并保温2-4小时,取出齿轮毛坯后空冷到850℃左右时油冷至室温,再将淬火之后的齿轮毛坯放入回火炉中加热到200℃,并保温3-5小时,取出齿轮毛坯后空气冷却至室温;
(4)剃齿:使用数控卧式剃齿机对调质处理后的齿轮毛坯进行剃齿加工;
(5)磨齿:使用数控磨床将齿轮毛坯加工成精度达标的汽车变速器齿轮。
优选的,所述步骤(2)中等温退火处理是将齿轮毛坯在退火炉中加热至580-620℃,并保温2-3小时后空气冷却至室温。
优选的,所述步骤(2)中渗碳处理是将齿轮毛坯在可控井式炉中加热至900-930℃,并在炉中滴入渗碳剂,并且保温4-6小时后空气冷却至室温。
有益效果:该汽车变速器齿轮加工工艺采用了数控高速干切自动滚齿机加工出齿轮,提高了加工效率,且并不破坏齿轮内部组织结构。使用先等温退火,可使得齿轮在后面的渗碳处理中变形小,再渗碳处理的工艺,可以保障齿轮内部组织的均匀性,保障齿轮芯部韧性的同时,提高齿轮表面的硬度和耐磨性,增加变速器齿轮的使用寿命。
具体实施方式
实施例1
该汽车变速器齿轮采用20Cr2Ni4A钢制造,其加工工艺分五步进行,先进行(1)滚齿:使用数控高速干切自动滚齿机加工出齿轮毛坯;(2)渗碳:将加工好的齿轮毛坯放入退火炉中进行等温退火处理,将齿轮毛坯在退火炉中加热至580℃,并保温2小时后空气冷却至室温;再将齿轮毛坯放入可控井式炉中进行渗碳处理,将齿轮毛坯在可控井式炉中加热至900℃,并在炉中滴入渗碳剂,并且保温4小时后空气冷却至室温;然后进行(3)调质:将渗碳之后的齿轮毛坯放入淬火炉中加热到920℃,并保温2小时,取出齿轮毛坯后空冷到850℃左右时油冷至室温,再将淬火之后的齿轮毛坯放入回火炉中加热到200℃,并保温3小时,取出齿轮毛坯后空气冷却至室温;再进行(4)剃齿:使用数控卧式剃齿机对调质处理后的齿轮毛坯进行剃齿加工;最后进行(5)磨齿:使用数控磨床将齿轮毛坯加工成精度达标的汽车变速器齿轮。
实施例2
按所述的相同步骤重复进行实施例1,不同之处在于:步骤(2)渗碳:将加工好的齿轮毛坯放入退火炉中进行等温退火处理,将齿轮毛坯在退火炉中加热至600℃,并保温2小时后空气冷却至室温;再将齿轮毛坯放入可控井式炉中进行渗碳处理,将齿轮毛坯在可控井式炉中加热至910℃,并在炉中滴入渗碳剂,并且保温5小时后空气冷却至室温;步骤(3)调质:将渗碳之后的齿轮毛坯放入淬火炉中加热到920℃,并保温3小时,取出齿轮毛坯后空冷到850℃左右时油冷至室温,再将淬火之后的齿轮毛坯放入回火炉中加热到200℃,并保温4小时,取出齿轮毛坯后空气冷却至室温。
实施例3
按所述的相同步骤重复进行实施例1,不同之处在于:步骤(2)渗碳:将加工好的齿轮毛坯放入退火炉中进行等温退火处理,将齿轮毛坯在退火炉中加热至620℃,并保温3小时后空气冷却至室温;再将齿轮毛坯放入可控井式炉中进行渗碳处理,将齿轮毛坯在可控井式炉中加热至930℃,并在炉中滴入渗碳剂,并且保温6小时后空气冷却至室温;步骤(3)调质:将渗碳之后的齿轮毛坯放入淬火炉中加热到920℃,并保温4小时,取出齿轮毛坯后空冷到850℃左右时油冷至室温,再将淬火之后的齿轮毛坯放入回火炉中加热到200℃,并保温5小时,取出齿轮毛坯后空气冷却至室温。
以上所述仅为本发明的实施例,并非因此限制本发明的专利范围,凡是利用本发明的说明书内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。
Claims (3)
1.一种汽车变速器齿轮加工工艺,其特征在于,该汽车变速器齿轮采用20Cr2Ni4A钢制造,其加工工艺步骤如下:
(1)滚齿:使用数控高速干切自动滚齿机加工出齿轮毛坯;
(2)渗碳:将加工好的齿轮毛坯放入退火炉中进行等温退火处理,再将齿轮毛坯放入可控井式炉中进行渗碳处理;
(3)调质:将渗碳之后的齿轮毛坯放入淬火炉中加热到920℃,并保温2-4小时,取出齿轮毛坯后空冷到850℃左右时油冷至室温,再将淬火之后的齿轮毛坯放入回火炉中加热到200℃,并保温3-5小时,取出齿轮毛坯后空气冷却至室温;
(4)剃齿:使用数控卧式剃齿机对调质处理后的齿轮毛坯进行剃齿加工;
(5)磨齿:使用数控磨床将齿轮毛坯加工成精度达标的汽车变速器齿轮。
2.按照权利要求1所述的一种汽车变速器齿轮加工工艺,其特征在于:所述步骤(2)中等温退火处理是将齿轮毛坯在退火炉中加热至580-620℃,并保温2-3小时后空气冷却至室温。
3.按照权利要求1所述的一种汽车变速器齿轮加工工艺,其特征在于:所述步骤(2)中渗碳处理是将齿轮毛坯在可控井式炉中加热至900-930℃,并在炉中滴入渗碳剂,并且保温4-6小时后空气冷却至室温。
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