WO2018209832A1 - 一种高强度粉末冶金黄铜基联轴器的制造方法 - Google Patents
一种高强度粉末冶金黄铜基联轴器的制造方法 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/04—Alloys based on copper with zinc as the next major constituent
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- the invention relates to the field of bearing manufacturing, and in particular to a method for manufacturing a high-strength powder metallurgy brass-based coupling.
- Couplings are the most commonly used coupling components for shafting of mechanical products. In the late 20th century, the coupling products at home and abroad developed rapidly. In the product design, how to choose the coupling that can meet the requirements of the machine from various couplings with various varieties and different performances. For most designers, It is always a problem that is bothering. Commonly used couplings are diaphragm coupling, tooth coupling, plum coupling, slider coupling, drum gear coupling, universal coupling, safety coupling, flexible coupling And serpentine spring couplings.
- couplings are increasingly being used in precision machinery controlled by servo systems such as machine tools and semiconductor system manufacturing machines.
- the coupling must require a high follow-up of its output relative to the input.
- the coupling must have high rigidity in addition to its own high toughness. The ability to exhaust the limits to accommodate high speed operation. Therefore, the coupling must have high torque rigidity, zero rotation clearance, and the elastic body compensated manufacturing machinery.
- the radial, axial, angular deviation, clockwise and counterclockwise rotation characteristics of the two axes during the transmission process are equal. .
- Couplings are widely used in industrial machinery, so the production and production of new materials for high-strength couplings are bound to emerge.
- This design invention is a kind of production by powder metallurgy production process. High-strength powder metallurgy coupling.
- An object of the present invention is to provide a method for manufacturing a high-strength powder metallurgy brass-based coupling, which solves the technical problem that there are many variables in the conventional machining, and it is difficult to ensure the uniformity of the dimensions.
- a method for preparing a high-strength powder metallurgy brass-based coupling of the present invention comprising the steps of:
- S101 powder mixing: the following weight percentage of the raw material powder is put into a mixer for mixing, and a mixed powder is obtained, the Zn element powder is 28-32%, the rare earth element powder is 0.5-0.7%, and the balance is copper powder and not Impurities avoided;
- S102 low-temperature diffusion: mixing the uniformly mixed powder in a diffusion furnace by low-temperature diffusion under the protection of a N gas protective atmosphere to pre-alloy some of the metal;
- S104 Sintering treatment: sintering treatment is performed below the melting point temperature of the added material, and the compact is gradually sintered in a N gas reducing atmosphere for 0.5-1.5 hours, heated to 300-500 ° C, and then heated to 850 by main sintering. -900 ° C, constant temperature 0.5-1.5 hours, then gradually cooled down to normal temperature after 0.5-1.5 hours, sintered into an alloy sintered body;
- S105 Finishing: pressing the alloy sintered body by a stamper to form a pressed piece, and having a predetermined shape, a specified density, and a specified dimensional accuracy of the joint;
- Oil immersion treatment the pressed piece is placed in a vacuum oil immersion machine for oil immersion treatment, so that the pores in the workpiece are filled with high wear-resistant lubricating oil, and the high-strength powder metallurgy brass-based coupling is obtained.
- the low temperature diffusion temperature in the step S102 is 200-400 ° C and the time is 25-35 min.
- the pressing pressure in the step S103 is 150-350 MPa, and the pressing density is 7.2-7.3 g/cm 3 .
- the oil immersion temperature in the step S106 is 80-100 ° C.
- the coupling has an oil content of 5-8%.
- the high-strength powder metallurgy brass-based coupling provided by the invention has a 45-degree sector and a cylinder to be produced together in one time, and the round R transition mode ensures the strength and toughness of the product to the utmost extent. Easy to manufacture, no cutting is required.
- the preparation method of the coupling of the invention adopts the mold pressing, so the consistency of the contour, the shape and the size is very good, and the technology which has many variables in the traditional mechanical processing and the consistency of the size thereof is solved. problem.
- the preparation method of the coupling of the invention has high material utilization rate of more than 99.5%; the use of the same manufacturing not only saves the post-processing installation process, but also greatly improves its own strength and toughness.
- FIG. 1 is a flow chart of a method for manufacturing a high strength powder metallurgy brass base coupling of the present invention.
- Figure 2 is a top plan view of the high strength powder metallurgy brass base coupling of the present invention.
- Figure 3 is a cross-sectional view of a high strength powder metallurgy brass base coupling of the present invention.
- the high-strength powder metallurgy brass-based coupling of the present invention is a cylinder having an inner diameter of ⁇ 3.3 and an outer diameter of ⁇ 6.3, and a 45-degree fan having an R7.3 height of 4.7 at one end.
- the product, the 45-degree sector and the cylinder are produced together in one time, and the circular R transition connection mode ensures the strength and toughness of the product to the utmost.
- a method for preparing a high-strength powder metallurgy brass-based coupling of the present invention comprising the steps of:
- S101 powder mixing: firstly, a base powder having a purity of 99.99% or more is selected and mixed, and thoroughly mixed by a V-type mixer, and the following weight percentage of the raw material powder is put into a mixer for mixing, and a mixed powder, Zn is obtained. Elemental powder: 28%, rare earth element powder: 0.6%, the balance is copper powder and unavoidable impurities;
- S104 Sintering treatment: uniformly tiling the above-mentioned compact in a setter and attaching it to a N gas reducing atmosphere, gradually Sintering heating for 0.5 hours, heating to 300 ° C, and then main sintering heated to 850 ° C, constant temperature for 0.5 hours, then gradually cooled down to room temperature over 0.5 hours, sintered into an alloy sintered body;
- S105 Finishing: pressing the above-mentioned deburred alloy sintered body by a stamper to form a pressed piece to have a pressed piece having a predetermined shape, a predetermined density, and a predetermined dimensional accuracy;
- a method for preparing a high-strength powder metallurgy brass-based coupling of the present invention comprising the steps of:
- S101 powder mixing: firstly, a base powder having a purity of 99.99% or more is selected and mixed, and thoroughly mixed by a V-type mixer, and the following weight percentage of the raw material powder is put into a mixer for mixing, and a mixed powder, Zn is obtained.
- Element powder 30%, rare earth element powder: 0.6%, the balance is copper powder and unavoidable impurities;
- S104 Sintering treatment: the above-mentioned compact is evenly laid in a setter and sealed in a N gas reducing atmosphere, gradually heated by sintering for 1 hour, heated to 400 ° C, and then heated by main sintering to 880 ° C, at a constant temperature of 1 hour. And then gradually cooled down to room temperature over 1 hour, and sintered into an alloy sintered body;
- S105 Finishing: pressing the above-mentioned deburred alloy sintered body by a stamper to form a pressed piece to have a pressed piece having a predetermined shape, a predetermined density, and a predetermined dimensional accuracy;
- S106 oil immersion treatment: the pressed piece is placed in a vacuum oil immersion machine for oil immersion treatment, and maintained at 90 ° C during the immersion oil process, so that the pores in the workpiece are filled with high wear-resistant lubricating oil, and high-strength powder metallurgy brass is obtained.
- the base coupling has an oil content of 6% in terms of volume percent.
- a method for preparing a high-strength powder metallurgy brass-based coupling of the present invention comprising the steps of:
- Powder mixing Firstly, the base powder with a purity of 99.99% or more is selected for the ratio and fully passed through the V-type mixer. Mixing, the following weight percentage of raw material powder is put into a mixer for mixing, and a mixed powder is obtained, Zn element powder: 32%, rare earth element powder: 0.6%, the balance is copper powder and unavoidable impurities;
- S104 Sintering treatment: the above-mentioned compact is evenly laid in a setter and sealed in a N gas reducing atmosphere, gradually heated by sintering for 1.5 hours, heated to 500 ° C, and then heated to 900 ° C by main sintering, at a constant temperature of 1.5 hours. And then gradually cooled down to normal temperature over 1.5 hours, and sintered into an alloy sintered body;
- S105 Finishing: pressing the above-mentioned deburred alloy sintered body by a stamper to form a pressed piece to have a pressed piece having a predetermined shape, a predetermined density, and a predetermined dimensional accuracy;
- S106 oil immersion treatment: the pressed piece is placed in a vacuum oil immersion machine for oil immersion treatment, and the immersion oil is kept at 100 ° C, so that the pores in the workpiece are filled with high wear-resistant lubricating oil, and high-strength powder metallurgy brass is obtained.
- the base coupling has an oil content of 8% in terms of volume percent.
- Table 1 shows the measurement results of oil content, radial crushing strength, tensile strength, twisting force and apparent hardness of the high-strength powder metallurgy brass-based coupling of the present invention.
- the high-strength powder metallurgy brass-based coupling provided by the invention has high material utilization rate of over 99.5%; the use of the same manufacturing process not only saves the post-processing installation process, but also greatly improves the process. Its own strength and toughness.
Abstract
一种高强度粉末冶金黄铜基联轴器的制备方法,包括以下步骤:粉末混合:将以下重量百分比的原料粉末放入混料机中进行混合,并得混料粉,Zn元素粉末:28-32%、稀土元素粉末:0.5-0.7%,余量为铜粉末以及不可避免的杂质;低温扩散:将混合均匀后的混料粉在扩散炉内通过在N气保护气氛的保护下进行低温扩散,使部分金属预先合金化;压制成型、烧结处理、精整、浸油处理、得所述高强度粉末冶金黄铜基联轴器;其解决了在传统机械加工的时候存在很多变量,难以保证其尺寸的一致性的技术问题。
Description
本发明涉及轴承制造领域,尤其涉及一种高强度粉末冶金黄铜基联轴器的制造方法。
联轴器是机械产品轴系传动最常用的联接部件。20世纪后期国内外联轴器产品发展很快,在产品设计时如何从品种甚多、性能各异的各种联轴器中选用能满足机器要求的联轴器,对多数设计人员来讲,始终是一个困扰的问题。常用联轴器有膜片联轴器,齿式联轴器,梅花联轴器,滑块联轴器,鼓形齿式联轴器,万向联轴器,安全联轴器,弹性联轴器及蛇形弹簧联轴器。
目前,联轴器被越来越多地被应用在机床和半导体系体例造机械等通过伺服系统控制的精密机械上。在这些领域里,和一般的制造机械不同的是,联轴器必须要求其输出相对于输入具有很高的追随性。特别是在要求高频率正逆转,高精度定位以及20000r/min以上的高速旋转的工作机床上使用时,联轴器除了本身必需具备高刚性外,还必须具有能耐受反复扭转负载的高弹性疲惫限度的能力,以适应高速运转。因此,联轴器本来必需具备高扭矩刚性、零回转间隙、弹性体补偿制造机械在传动过程中两轴所产生的径向、轴向、角向偏差、顺时针与逆时针回转特性相平等特点。
联轴器在工业机械上的大量应用,因此针对高强度联轴器新材料新设计的制作和生产应用势必会应运而生,本设计发明就是通过粉末冶金的生产工艺压制而制得的一种高强度粉末冶金联轴器。
发明内容
技术问题:本发明的目的在于提供一种高强度粉末冶金黄铜基联轴器的制造方法,解决了在传统机械加工的时候存在很多变量,难以保证其尺寸的一致性的技术问题。
技术方案:为实现上述目的,本发明提供如下技术方案:
本发明的一种高强度粉末冶金黄铜基联轴器的制备方法,所述联轴器制造方法包括以下步骤:
S101:粉末混合:将以下重量百分比的原料粉末放入混料机中进行混合,并得混料粉,Zn元素粉末28-32%、稀土元素粉末0.5-0.7%,余量为铜粉末以及不可避免的杂质;
S102:低温扩散:将混合均匀后的混料粉在扩散炉内通过在N气保护气氛的保护下进行低温扩散,使部分金属预先合金化;
S103:压制成型:将低温扩散后的粉末置于模具中压制成型,压成联轴器压坯;
S104:烧结处理:在所加材料的熔点温度以下进行烧结处理,将上述压坯在N气还原气氛中,逐渐烧结加热经0.5-1.5小时,升温到300-500℃,再主烧结加热到850-900℃,恒温0.5-1.5小时,然后经0.5-1.5小时逐渐降温冷却至常温,烧结成合金烧结体;
S105:精整:将所述合金烧结体用压模进行压制整型形成压制件,使其具有联轴器规定的形状、规定的密度及规定尺寸精度的压件;
S106:浸油处理:将所述压制件置于真空浸油机内进行浸油处理,使工件内的孔隙充满高耐磨润滑油,得所述高强度粉末冶金黄铜基联轴器。
其中,
所述步骤S102中低温扩散温度为:200-400℃,时间为25-35min。
所述步骤S103中压制压力为150-350MPa,压制密度为7.2-7.3g/cm3。
所述步骤S106中所述浸油温度为:80-100℃。
所述联轴器的含油率为5-8%。
有益效果:与现有技术相比,本发明的有益效果是:
1、本发明提供的高强度粉末冶金黄铜基联轴器,45度扇形区与圆柱一起化一次性生产出来,并且圆R过渡的方式,最大限度地保证了产品的强度和韧性。易于制造,不需要切削加工。
2、本发明联轴器的制备方法,采用模具压制,因此其轮廓、形状和尺寸的一致性很好,解决了在传统机械加工的时候存在很多变量,很难保证其尺寸的一致性的技术问题。
3、本发明联轴器的制备方法,材料利用率高,达到99.5%以上;采用一起化制造出来,不仅省下了后期的处理安装过程,而且大大提高了其自身的强度和韧性。
图1为本发明中高强度粉末冶金黄铜基联轴器的制造方法流程图。
图2为本发明中高强度粉末冶金黄铜基联轴器的端面俯视图。
图3为本发明中高强度粉末冶金黄铜基联轴器的剖视图。
为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。在本发明的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。应当注意,为了清楚的目的,附图和说明中省略了与本发明无关的、本领域普通技术人员已知的部件和处理的表示和描述。基于本发明中的实施例,本领域普通技术人员在没有付出创造性劳动的前提下所获得的所有其他实施例,都属于本发明保护的范围。
如图2、图3所示,本发明高强度粉末冶金黄铜基联轴器为内径是Ф3.3外径是Ф6.3的圆柱体,一端带有R7.3高度为4.7的45度扇形的产品,该45度扇形区与圆柱一起化一次性生产出来,并且圆R过渡的连接方式,最大限度地保证了产品的强度和韧性。
实施例1
本发明的一种高强度粉末冶金黄铜基联轴器的制备方法,所述联轴器制造方法包括以下步骤:
S101:粉末混合:首先选择纯度99.99%以上的基粉进行配比并通过V型混料机充分混合,将以下重量百分比的原料粉末放入混料机中进行混合,并得混料粉,Zn元素粉末:28%、稀土元素粉末:0.6%,余量为铜粉末以及不可避免的杂质;
S102:低温扩散:将混合均匀后的混料粉在扩散炉内通过通过200℃,在N气的保护下进行35分钟低温扩散,使部分金属预先合金化。
S103:压制成型:将低温扩散后的粉末置于模具中压制成型,压成压坯;压力为150MPa,压制密度为7.2g/cm3。
S104:烧结处理:将上述压坯均匀平铺在承烧盒中并加盖在N气还原气氛中,逐渐
烧结加热经0.5小时,升温到300℃,再主烧结加热到850℃,恒温0.5小时,然后经0.5小时逐渐降温冷却至常温,烧结成合金烧结体;
S105:精整:将上述去毛刺后合金烧结体用压模进行压制整型形成压制件,使其具有规定的形状、规定的密度及规定尺寸精度的压件;
S106:浸油处理:将所述压制件置于真空浸油机内进行浸油处理,浸油过程中保持80℃,使工件内的孔隙充满高耐磨润滑油,得所述高强度粉末冶金黄铜基联轴器,以体积百分比计,所述联轴器的含油率为5%。
实施例2
本发明的一种高强度粉末冶金黄铜基联轴器的制备方法,所述联轴器制造方法包括以下步骤:
S101:粉末混合:首先选择纯度99.99%以上的基粉进行配比并通过V型混料机充分混合,将以下重量百分比的原料粉末放入混料机中进行混合,并得混料粉,Zn元素粉末:30%、稀土元素粉末:0.6%,余量为铜粉末以及不可避免的杂质;
S102:低温扩散:将混合均匀后的混料粉在扩散炉内通过通过300℃,在N气的保护下进行30分钟低温扩散,使部分金属预先合金化。
S103:压制成型:将低温扩散后的粉末置于模具中压制成型,压成压坯;压力为260MPa,压制密度为7.3g/cm3。
S104:烧结处理:将上述压坯均匀平铺在承烧盒中并加盖在N气还原气氛中,逐渐烧结加热经1小时,升温到400℃,再主烧结加热到880℃,恒温1小时,然后经1小时逐渐降温冷却至常温,烧结成合金烧结体;
S105:精整:将上述去毛刺后合金烧结体用压模进行压制整型形成压制件,使其具有规定的形状、规定的密度及规定尺寸精度的压件;
S106:浸油处理:将所述压制件置于真空浸油机内进行浸油处理,浸油过程中保持90℃,使工件内的孔隙充满高耐磨润滑油,得到高强度粉末冶金黄铜基联轴器,以体积百分比计,所述联轴器的含油率为6%。
实施例3
本发明的一种高强度粉末冶金黄铜基联轴器的制备方法,所述联轴器制造方法包括以下步骤:
S101:粉末混合:首先选择纯度99.99%以上的基粉进行配比并通过V型混料机充分
混合,将以下重量百分比的原料粉末放入混料机中进行混合,并得混料粉,Zn元素粉末:32%、稀土元素粉末:0.6%,余量为铜粉末以及不可避免的杂质;
S102:低温扩散:将混合均匀后的混料粉在扩散炉内通过通过400℃,在N气的保护下进行35分钟低温扩散,使部分金属预先合金化。
S103:压制成型:将低温扩散后的粉末置于模具中压制成型,压成压坯;压力为350MPa,压制密度为7.3g/cm3。
S104:烧结处理:将上述压坯均匀平铺在承烧盒中并加盖在N气还原气氛中,逐渐烧结加热经1.5小时,升温到500℃,再主烧结加热到900℃,恒温1.5小时,然后经1.5小时逐渐降温冷却至常温,烧结成合金烧结体;
S105:精整:将上述去毛刺后合金烧结体用压模进行压制整型形成压制件,使其具有规定的形状、规定的密度及规定尺寸精度的压件;
S106:浸油处理:将所述压制件置于真空浸油机内进行浸油处理,浸油过程中保持100℃,使工件内的孔隙充满高耐磨润滑油,得到高强度粉末冶金黄铜基联轴器,以体积百分比计,所述联轴器的含油率为8%。
实施效果:
表1为本发明高强度粉末冶金黄铜基联轴器的含油率、径向压溃强度、抗拉强度、扭断力、表观硬度的测定结果。
表1联轴器的含油率、径向压溃强度、抗拉强度、扭断力、表观硬度
样品 | 含油率% | 径向压溃强度(MPa) | 抗拉强度(N) | 扭断力(N-m) | 表观硬度(HB) |
实施例1 | 5% | 538 | 418 | 4.83 | 52.5 |
实施例2 | 6% | 562 | 432 | 5.03 | 55.0 |
实施例3 | 8% | 587 | 445 | 5.25 | 59.2 |
通过数据得出,本发明提供的高强度粉末冶金黄铜基联轴器,材料利用率高,达到99.5%以上;采用一起化制造出来,不仅省下了后期的处理安装过程,而且大大提高了其自身的强度和韧性。
Claims (5)
- 一种高强度粉末冶金黄铜基联轴器的制备方法,其特征在于,所述联轴器制造方法包括以下步骤:S101:粉末混合:将以下重量百分比的原料粉末放入混料机中进行混合,并得混料粉,Zn元素粉末28-32%、稀土元素粉末0.5-0.7%,余量为铜粉末以及不可避免的杂质;S102:低温扩散:将混合均匀后的混料粉在扩散炉内通过在N气保护气氛的保护下进行低温扩散,使部分金属预先合金化;S103:压制成型:将低温扩散后的粉末置于模具中压制成型,压成联轴器压坯;S104:烧结处理:在所加材料的熔点温度以下进行烧结处理,将上述压坯在N气还原气氛中,逐渐烧结加热经0.5-1.5小时,升温到300-500℃,再主烧结加热到850-900℃,恒温0.5-1.5小时,然后经0.5-1.5小时逐渐降温冷却至常温,烧结成合金烧结体;S105:精整:将所述合金烧结体用压模进行压制整型形成压制件,使其具有联轴器规定的形状、规定的密度及规定尺寸精度的压件;S106:浸油处理:将所述压制件置于真空浸油机内进行浸油处理,使工件内的孔隙充满高耐磨润滑油,得所述高强度粉末冶金黄铜基联轴器。
- 根据权利要求1所述的高强度粉末冶金黄铜基联轴器的制备方法,其特征在于,所述步骤S102中低温扩散温度为:200-400℃,时间为25-35min。
- 根据权利要求1所述的高强度粉末冶金黄铜基联轴器的制备方法,其特征在于,所述步骤S103中压制压力为150-350MPa,压制密度为7.2-7.3g/cm3。
- 根据权利要求1所述的高强度粉末冶金黄铜基联轴器的制备方法,其特征在于,所述步骤S106中所述浸油温度为:80-100℃。
- 根据权利要求1所述的高强度粉末冶金黄铜基联轴器的制备方法,其特征在于,所述联轴器的含油率为5-8%。
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