阅读说明：本技术 一种复合轴承的制备方法及其复合轴承 (Preparation method of composite bearing and composite bearing thereof ) 是由 马敬轩 于 2021-06-10 设计创作，主要内容包括：本发明公开一种复合轴承的制备方法及其复合轴承,该复合轴承的制备方法包括一下步骤：钢板下料；钢板前处理；烧结铜合金粉末；复合改性聚醚醚铜；轧制改性聚醚醚酮；精轧板材；落料；加工油槽；成圆；整形、倒角,防锈。复合轴承由外层至内层依次包括钢板层、设置在所述钢板层上的铜粉板层以及设置在所述铜粉板层上的聚醚醚酮改性材料层。本发明的有益效果：本发明使表面聚醚醚酮层韧性更加良好不易脆化和脱落,使烧结板材更容易加工,使轴承内表面润滑性更好,承载能力更强；可取代如工程机械起重机起重臂部位复合轴承,该部位承载力、大工况条件恶劣,原有聚甲醛复合轴承寿命为2年,应用该材料寿命可达5年以上。(The invention discloses a preparation method of a composite bearing and the composite bearing, the preparation method of the composite bearing comprises the following steps: blanking a steel plate; pre-treating a steel plate; sintering copper alloy powder; carrying out composite modification on polyether ether copper; rolling modified polyether-ether-ketone; finish rolling the plate; blanking; processing an oil groove; rounding; shaping, chamfering and rust prevention. The composite bearing sequentially comprises a steel plate layer, a copper powder plate layer arranged on the steel plate layer and a polyether-ether-ketone modified material layer arranged on the copper powder plate layer from an outer layer to an inner layer. The invention has the beneficial effects that: the invention ensures that the surface polyether-ether-ketone layer has better toughness and is not easy to embrittle and fall off, so that the sintered plate is easier to process, the inner surface of the bearing has better lubricity and stronger bearing capacity; the composite bearing can replace a composite bearing at a crane boom part of an engineering machinery crane, the bearing capacity and large working condition of the composite bearing are poor, the service life of the original polyformaldehyde composite bearing is 2 years, and the service life of the material can reach more than 5 years.)

1. A preparation method of a composite bearing is processed by adopting a polyether-ether-ketone modified material, and is characterized in that the preparation method of the polyether-ether-ketone modified material of the composite bearing comprises the following steps: 100 parts of polyether-ether-ketone, 5-8 parts of molybdenum disulfide, 3-5 parts of polytetrafluoroethylene and 3-5 parts of polyamide;

the preparation method of the composite bearing comprises the following steps:

blanking a steel plate. Processing the raw material steel plate on a plate shearing machine according to the product specification;

and (II) steel plate pretreatment. Deoiling and sanding the processed plate;

and (III) sintering the copper alloy powder. Spreading spherical copper alloy on the surface of the treated steel plate, and firing for 1 hour at 850-920 ℃ in a high-temperature chain sintering furnace under the protection of hydrogen reduction and nitrogen;

and (IV) carrying out composite modification on the polyether ether copper. Spreading the modified polyether-ether-ketone material on the surface of the copper powder plate, firing the copper powder plate by using a low-temperature mesh-belt sintering furnace, and firing the copper powder plate for 35-50min at the temperature of 370-;

and (V) rolling the modified polyether-ether-ketone. Rolling the melted plate on a double-roller mill; rapidly rolling the plate by a double-roller rolling mill at 140 ℃ in a preheating furnace to obtain a composite plate with an oil storage pit on the surface;

and (VI) finishing rolling the plate. Performing finish rolling on the composite plate with the oil storage pit on the surface by using a smooth surface double-roller mill;

(VII) blanking. Processing the finish-rolled plate into a single plate on a punch by adopting a punch blanking die;

(VIII) processing an oil groove. Processing various oil grooves required by the plate by using a milling machine;

(nine) rounding. Rounding the single plate by a three-station rounding machine to obtain a rounded bearing;

and (ten) shaping, chamfering and rust prevention. And carrying out fine extrusion, inner and outer corner processing and tinning treatment on the rounded bearing to obtain the composite bearing.

2. The method of manufacturing a composite bearing according to claim 1, wherein: the mesh number of the spherical copper alloy in the step (III) is 40-60 meshes.

3. The method of manufacturing a composite bearing according to claim 1, wherein: and (V) rolling on a double-roller mill in the step (V) at the temperature of 120 ℃ and the speed of 0.2 m/min.

4. A composite bearing, characterized by:

the composite bearing sequentially comprises a steel plate layer, a copper powder plate layer arranged on the steel plate layer and a polyether-ether-ketone modified material layer arranged on the copper powder plate layer from an outer layer to an inner layer.

5. A composite bearing according to claim 4, wherein: the thickness of the steel plate layer is 1.8-3.5mm, the thickness of the copper powder plate layer is 2.1-4.Omm, and the thickness of the polyether-ether-ketone modified material layer is 0.3-0.4 mm.

Technical Field

The invention relates to a bearing, in particular to a preparation method of a composite bearing and the composite bearing.

Background

The sliding bearing is divided into: single material bearings and composite material bearings. The sliding bearings applied in severe working condition environments such as medium and heavy loads are respectively steel-based, copper-based, nylon, composite bearings and other bearings, and the composite bearings used in the environments are mainly two series: 1) three-layer composite material with steel base, copper alloy and modified polyformaldehyde as main components, and 2) composite material with steel base and copper alloy as main components. Today, the performances of the two materials cannot completely meet the market demands in the rapid development of science and technology, and a material with higher performance is urgently needed to replace the two materials. As the early-stage polymer material polyetheretherketone is mature day by day in domestic production, the material is gradually applied to various fields such as aerospace, military industry, ships, automobiles, engineering machinery, petroleum machinery and the like, and particularly after being modified, the material is applied to a three-layer composite bearing material, so that the superiority is more remarkable.

The existing polyetheretherketone material is influenced by material cost factors and characteristics of the material, and is rarely applied to sliding bearings. Therefore, a three-layer composite material is developed to meet the application of the material on a sliding bearing so as to solve the market demand for the development of high-performance materials. The polyether-ether-ketone layer on the surface has better toughness and is not easy to embrittle and fall off, the sintered plate is easier to process, and the inner surface of the bearing has better lubricity.

The composite bearing part is applied in the environment with medium and heavy load and harsh conditions, and two forms of products are adopted at present.

The composite bearing is formed by rolling a bush with a double-layer material and a bimetal structure, wherein the outer circle of the bush is made of low-carbon steel, and the inner circle of the bush is made of copper alloy with a certain thickness. When the product is used, the composite bearing is particularly seriously abraded under the condition of oil-free lubrication, and the service life of the whole machine is influenced.

The other is a three-layer composite bearing, the outer circle is made of low-carbon steel, the middle is a copper powder plate formed by copper alloy with a certain thickness, a layer of polyformaldehyde with a certain thickness is melted on the copper powder plate, and the composite bearing is formed by rolling. The product has the limitation of use temperature when in use, and is seriously abraded when reaching a certain temperature, the bearing capacity is sharply reduced, and the service life of the whole machine is influenced.

The conventional polyether-ether-ketone material can be embrittled, so that the polyether-ether-ketone on the inner surface is delaminated, and the composite bearing is not lubricated due to crushing during working, and the service life of the composite bearing is greatly shortened.

Disclosure of Invention

In order to solve the existing problems, the invention provides a preparation method of a composite bearing and the composite bearing. The invention is realized by the following technical scheme.

A preparation method of a composite bearing is processed by adopting a polyether-ether-ketone modified material, and the polyether-ether-ketone modified material for preparing the composite bearing comprises the following steps: 100 parts of polyether-ether-ketone, 5-8 parts of molybdenum disulfide, 3-5 parts of polytetrafluoroethylene and 3-5 parts of polyamide;

the preparation method of the composite bearing comprises the following steps:

blanking a steel plate. Processing the raw material steel plate on a plate shearing machine according to the product specification;

and (II) steel plate pretreatment. Deoiling and sanding the processed plate;

and (III) sintering the copper alloy powder. Spreading spherical copper alloy on the surface of the treated steel plate, and firing for 1 hour at 850-920 ℃ in a high-temperature chain sintering furnace under the protection of hydrogen reduction and nitrogen;

and (IV) carrying out composite modification on the polyether ether copper. Spreading the modified polyether-ether-ketone material on the surface of the copper powder plate, firing the copper powder plate by using a low-temperature mesh-belt sintering furnace, and firing the copper powder plate for 35-50min at the temperature of 370-;

and (V) rolling the modified polyether-ether-ketone. Rolling the melted plate on a double-roller mill; rapidly rolling the plate by a double-roller rolling mill at 140 ℃ in a preheating furnace to obtain a composite plate with an oil storage pit on the surface;

and (VI) finishing rolling the plate. Performing finish rolling on the composite plate with the oil storage pit on the surface by using a smooth surface double-roller mill;

(VII) blanking. Processing the finish-rolled plate into a single plate on a punch by adopting a punch blanking die;

(VIII) processing an oil groove. Processing various oil grooves required by the plate by using a milling machine;

(nine) rounding. Rounding the single plate by a three-station rounding machine to obtain a rounded bearing;

and (ten) shaping, chamfering and rust prevention. And carrying out fine extrusion, inner and outer corner processing and tinning treatment on the rounded bearing to obtain the composite bearing.

Preferably, the mesh number of the spherical copper alloy in the step (three) is 40-60 meshes.

Preferably, the rolling temperature on the double-roller mill in the step (five) is 120 ℃, and the speed is 0.2 m/min.

The composite bearing sequentially comprises a steel plate layer, a copper powder plate layer and a polyether-ether-ketone modified material layer, wherein the copper powder plate layer is arranged on the steel plate layer, and the polyether-ether-ketone modified material layer is arranged on the copper powder plate layer from an outer layer to an inner layer.

Preferably, the thickness of the steel plate layer is 1.8-3.5mm, the thickness of the copper powder plate layer is 2.1-4.Omm, and the thickness of the polyether-ether-ketone modified material layer is 0.3-0.4 mm.

The invention has the beneficial effects that: according to the invention, microelements such as molybdenum disulfide, polytetrafluoroethylene and UV9 are added into polyether-ether-ketone, so that the toughness of the polyether-ether-ketone layer on the surface is better and the polyether-ether-ketone layer is not easy to embrittle and fall off, the sintered plate is easier to process, the lubricating property of the inner surface of the bearing is better, and the bearing capacity is stronger; the composite bearing can replace a composite bearing at a crane boom part of an engineering machinery crane, the bearing capacity and large working condition of the composite bearing are poor, the service life of the original polyformaldehyde composite bearing is 2 years, and the service life of the material can reach more than 5 years.

Drawings

FIG. 1 is a schematic structural diagram of a composite bearing according to the present invention;

fig. 2 is a schematic structural diagram (ii) of the composite bearing of the present invention.

Detailed Description

The embodiments of the present invention will be described more fully hereinafter.

In specific embodiment 1, a method for preparing a composite bearing, which uses a modified material of polyetheretherketone to process, the modified material of polyetheretherketone for preparing the composite bearing comprises the following steps: 100 parts of polyether-ether-ketone, 5-8 parts of molybdenum disulfide, 3-5 parts of polytetrafluoroethylene and 3-5 parts of polyamide;

the preparation method of the composite bearing comprises the following steps:

blanking a steel plate. Processing the raw material steel plate on a plate shearing machine according to the product specification;

and (II) steel plate pretreatment. Deoiling and sanding the processed plate;

and (III) sintering the copper alloy powder. Spreading spherical copper alloy on the surface of the treated steel plate, and firing for 1 hour at 850-920 ℃ in a high-temperature chain sintering furnace under the protection of hydrogen reduction and nitrogen;

and (IV) carrying out composite modification on the polyether ether copper. Spreading the modified polyether-ether-ketone material on the surface of the copper powder plate, firing the copper powder plate by using a low-temperature mesh-belt sintering furnace, and firing the copper powder plate for 35-50min at the temperature of 370-;

and (V) rolling the modified polyether-ether-ketone. Rolling the melted plate on a double-roller mill; rapidly rolling the plate by a double-roller rolling mill at 140 ℃ in a preheating furnace to obtain a composite plate with an oil storage pit on the surface;

and (VI) finishing rolling the plate. Performing finish rolling on the composite plate with the oil storage pit on the surface by using a smooth surface double-roller mill;

(VII) blanking. Processing the finish-rolled plate into a single plate on a punch by adopting a punch blanking die;

(VIII) processing an oil groove. Processing various oil grooves required by the plate by using a milling machine;

(nine) rounding. Rounding the single plate by a three-station rounding machine to obtain a rounded bearing;

and (ten) shaping, chamfering and rust prevention. And carrying out fine extrusion, inner and outer corner processing and tinning treatment on the rounded bearing to obtain the composite bearing.

Wherein, in the step (III), the mesh number of the spherical copper alloy is 40-60 meshes; in the fifth step, the rolling temperature on the double-roller mill is 120 ℃ and the speed is 0.2 m/min.

The composite bearing comprises a steel plate layer 1, a copper powder plate layer 2 arranged on the steel plate layer 1 and a polyether-ether-ketone modified material layer 3 arranged on the copper powder plate layer 2 in sequence from an outer layer to an inner layer, and the composite bearing is further provided with an opening 4 from the outer layer to the inner layer.

Wherein the thickness of the steel plate layer is 1.8-3.5mm, the thickness of the copper powder plate layer is 2.1-4.Omm, and the thickness of the polyether-ether-ketone modified material layer is 0.3-0.4 mm.

The conventional polyether-ether-ketone material can generate an embrittlement phenomenon, so that the polyether-ether-ketone on the inner surface of the bearing is delaminated, and is crushed during working to cause a non-lubrication phenomenon, so that the service life of the bearing is greatly reduced.

In the description herein, reference to the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.