阅读说明：本技术 一种储油穴轴承钢套的制作方法 (Manufacturing method of oil storage cavity bearing steel bushing ) 是由 张国强 于 2018-09-07 设计创作，主要内容包括：一种储油穴轴承钢套的制作方法,包括如下步骤,锯料、粗车、半精车、铣油穴、打油孔、渗碳、粗磨外径、精磨内径、精磨外径、喷膜、去毛刺；所述锯料,包括取20CrMO材质的钢管,从20CrMO材质的钢管锯取一段钢料；粗车钢料外径余量是1.5-2mm,内径余量1.5-2mm；半精车钢料外径余量0.4-1mm,内径余量0.4-1mm；铣油穴是半精车后在钢料内壁铣离散分布的椭圆形油穴和绕钢料周向设置的环形油穴,环形油穴两侧分别设有椭圆形油穴；在环形油穴上打油孔,而后做渗碳处理,渗碳处理后,用无心磨床粗磨外径,而后采用内圆磨床精磨内径；喷膜是在钢料外表喷涂改性MoS<Sub>2</Sub>,喷涂厚度为0.01mm-0.03mm,而后烘干。(A manufacturing method of an oil storage cavity bearing steel bushing comprises the following steps of sawing, rough turning, semi-finish turning, milling an oil cavity, drilling an oil hole, carburizing, roughly grinding an outer diameter, finely grinding an inner diameter and an outer diameter, spraying a film and deburring; the sawing method comprises the steps of sawing a section of steel material from a steel pipe made of 20CrMO material; the allowance of the outer diameter of the rough turning steel material is 1.5-2mm, and the allowance of the inner diameter is 1.5-2 mm; semi-finish turning the steel material with the outer diameter allowance of 0.4-1mm and the inner diameter allowance of 0.4-1 mm; the milling oil holes are oval oil holes which are discretely distributed and annular oil holes which are circumferentially arranged around the steel material after semi-finish turning are milled on the inner wall of the steel material, and the oval oil holes are respectively arranged on two sides of the annular oil holes; drilling an oil hole on the annular oil hole, then performing carburizing treatment, after the carburizing treatment, roughly grinding the outer diameter by using a centerless grinding machine, and then accurately grinding the inner diameter by using an internal grinding machine; the film spraying is to spray modified MoS on the surface of the steel material 2 The spraying thickness is 0.01mm-0.03mm, and then drying is carried out.)

1. A manufacturing method of an oil storage cavity bearing steel bushing is characterized by comprising the following steps of sawing, rough turning, semi-finish turning, milling an oil cavity, drilling an oil hole, carburizing, roughly grinding an outer diameter, finely grinding an inner diameter and an outer diameter, spraying a film and deburring;

the sawing method comprises the steps of sawing a section of steel material from a steel pipe made of 20CrMO material;

the allowance of the outer diameter of the rough turning steel material is 1.5-2mm, and the allowance of the inner diameter is 1.5-2 mm;

semi-finish turning the steel material with the outer diameter allowance of 0.4-1mm and the inner diameter allowance of 0.4-1 mm;

the milling oil holes are oval oil holes which are discretely distributed and annular oil holes which are circumferentially arranged around the steel material after semi-finish turning are milled on the inner wall of the steel material, and the oval oil holes are respectively arranged on two sides of the annular oil holes;

drilling an oil hole on the annular oil hole, then performing carburizing treatment, after the carburizing treatment, roughly grinding the outer diameter by using a centerless grinding machine, and then accurately grinding the inner diameter by using an internal grinding machine;

the film spraying is to spray modified MoS on the surface of the steel material₂The spraying thickness is 0.01mm-0.03mm, and then drying is carried out.

2. The method for manufacturing the bearing steel sleeve of the oil storage cavity as claimed in claim 1, wherein the method comprises the following steps: the oval oil holes are annularly arranged around a central axis of the steel material, the oval oil holes on the same horizontal plane are distributed at equal intervals, and two adjacent rows of oval oil holes are distributed in a staggered mode.

3. The method for manufacturing the bearing steel sleeve of the oil storage cavity as claimed in claim 1, wherein the method comprises the following steps: the area of the oil pits accounts for 15-20% of the area of the inner wall of the steel material.

4. The method for manufacturing the bearing steel sleeve of the oil storage cavity as claimed in claim 1, wherein the method comprises the following steps: after carburization, the depth of a hardened layer is 0.8-1.2mm, and the hardness of the outer surface of the steel material is 56-62 HRC.

5. The method for manufacturing the bearing steel sleeve of the oil storage cavity as claimed in claim 1, wherein the method comprises the following steps: the modified MoS2 comprises MoS2, tungsten disulfide and aluminum powder, wherein the MoS2, the tungsten disulfide and the aluminum powder are mechanically mixed to obtain spraying powder, and the mass ratio of the MoS2 to the tungsten disulfide to the aluminum powder is 3-7: 1: 1.

Technical Field

The invention relates to a method for manufacturing a bearing steel sleeve of an oil storage hole.

Background

The bearing steel sleeve is loaded by a metal matrix, and a solid lubricating material with a special formula plays a role in lubrication. The oil film has the characteristics of high bearing capacity, impact resistance, high temperature resistance, strong self-lubricating capacity and the like, is particularly suitable for occasions which are difficult to lubricate and form oil films, such as heavy load, low speed, reciprocation or swing and the like, and is not easy to be affected by water flushing and erosion and flushing of other acid liquid. The service life of the shaft sleeve is ideal due to unreasonable distribution of oil holes, improper heat treatment process and subsequent processing process of the conventional bearing.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a manufacturing method of an oil storage cavity bearing steel sleeve, which is reasonable in structural design, good in durability and high in precision.

The technical scheme adopted by the invention is as follows: a manufacturing method of an oil storage cavity bearing steel bushing comprises the following steps of sawing, rough turning, semi-finish turning, milling an oil cavity, drilling an oil hole, carburizing, roughly grinding an outer diameter, finely grinding an inner diameter and an outer diameter, spraying a film and deburring; the sawing method comprises the steps of sawing a section of steel material from a steel pipe made of 20CrMO material; the allowance of the outer diameter of the rough turning steel material is 1.5-2mm, and the allowance of the inner diameter is 1.5-2 mm; semi-finish turning the steel material with the outer diameter allowance of 0.4-1mm and the inner diameter allowance of 0.4-1 mm; the milling oil holes are oval oil holes which are discretely distributed and annular oil holes which are circumferentially arranged around the steel material after semi-finish turning are milled on the inner wall of the steel material, and the oval oil holes are respectively arranged on two sides of the annular oil holes; and (2) drilling oil holes on the annular oil holes, then performing carburizing treatment, performing coarse grinding on the outer diameter of the steel by using a centerless grinding machine after the carburizing treatment, then accurately grinding the inner diameter by using an internal grinding machine, spraying a modified MoS2 on the outer surface of the steel by spraying the film with the spraying thickness of 0.01-0.03mm, then drying and deburring.

Furthermore, the oval oil holes are annularly arranged around the central axis of the steel material, the oval oil holes on the same horizontal plane are distributed at equal intervals, and two adjacent rows of oval oil holes are distributed in a staggered manner.

Furthermore, the area of the oil pocket accounts for 15-20% of the area of the inner wall of the steel material.

Furthermore, after carburization, the depth of a hardened layer is 0.8-1.2mm, and the hardness of the outer surface of the steel material is 56-62 HRC.

Further, the modified MoS2 comprises MoS2, tungsten disulfide and aluminum powder, the MoS2, the tungsten disulfide and the aluminum powder are mechanically mixed to obtain spraying powder, and the mass ratio of the MoS2 to the tungsten disulfide to the aluminum powder is 3-7: 1: 1.

compared with the prior art, the invention has the advantages that:

the heat treatment process is based on the characteristic of 20CrMo material, and by adopting the heat treatment process, the wear resistance hardness index of the shaft sleeve is improved, and the impact resistance is enhanced.

The invention relates to a modified MoS₂Therefore, the lubricating performance index and the wear resistance index are obviously improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of fig. 1 from another view angle.

Fig. 3 is a schematic structural view of the tool.

Detailed Description

The present invention will be described in detail with reference to specific examples.

As shown in fig. 1 and 2, the method for manufacturing a bearing steel bushing with an oil storage pocket according to the present embodiment includes the steps of sawing, rough turning, semi-finish turning, milling the oil pocket, drilling the oil hole 30, carburizing, roughly grinding the outer diameter, finely grinding the inner diameter, finely grinding the outer diameter, spraying a film, and deburring; the sawing method comprises the steps of sawing a section of steel material 1 from a steel pipe made of 20 CrMo; the allowance of the outer diameter of the rough turning steel material 1 is 1.5-2mm, and the allowance of the inner diameter is 1.5-2 mm; the allowance of the outer diameter of the semi-finish turning steel material 1 is 0.4-1mm, and the allowance of the inner diameter is 0.4-1 mm.

The milling oil pits are oval oil pits 2 which are discretely distributed on the inner wall of the steel material 1 after semi-finish turning and annular oil pits 3 which are circumferentially arranged around the steel material 1, and the oval oil pits 2 are respectively arranged on two sides of the annular oil pits 3; and (3) drilling an oil hole 30 on the annular oil hole 3, then performing carburizing treatment, after the carburizing treatment, roughly grinding the outer diameter by using a centerless grinding machine, and then finely grinding the inner diameter.

The carburizing process comprises the steps of placing a steel material 1 in a heat treatment tool and placing the steel material in a carburizing furnace; and (2) gas removal, wherein the purpose of gas removal is to remove the air in the furnace, recover the air in the furnace to the carbon potential atmosphere specified by the process, then charge the prepared steel material 1, raise the temperature of the furnace to 920-940 ℃, keep the temperature, and then drop a carburizing agent, preferably, aviation kerosene, methanol and kerosene are used as carrier gases, or methanol and acetone or acetic acid and ethyl acetate are used as carrier gases. When dropping into the carburizing agent, from a few to many, generally just when going into the furnace, 50 ~ 55 drops are dropped into per minute, and then the rising and the heating time extension of furnace temperature, the number of dropping into should also increase gradually, and the volume of dropping into per minute can increase to 85 ~ 90 drops, and in the middle of keeping warm, the volume of dropping into can not have too big fluctuation. After the workpiece is carburized, the workpiece is taken out of the furnace and then put into a cooling pit with a clamp for cooling. The cooling pit is filled with some charcoal or some kerosene and then with protective gas, so that when the workpiece is cooled, it will not produce decarbonization and oxidation, and when the workpiece is cooled to below 200 deg.C, it can be taken out and cooled in the air, and in order to accelerate cooling speed, the cooling pit can be externally passed through by circulating cooling water. The carburization method is designed based on the characteristics of the 20CrMo material, and the carburization method is designed according to the requirements of hardness and brittleness.

Because of the axle sleeve is cylindricly, and extremely easy deformation in heat treatment process, and the bearing is inseparable hardware, consequently the emergence of the deformation condition of not allowing, shown axle sleeve includes the cock body, the cock body includes cone 4, and the terminal surface of two cones 4 is equipped with opposite sex magnet 6 respectively, and the axis of cock body is equipped with a linear channel that runs through. During the use, the axle sleeve both ends are filled in respectively to cone 4, and two cones 4 exert the pulling force because of opposite sex attracts the effect, for eliminating this effort, set up rigid support rod 5 to the cone 4 that sets up at the axle sleeve both ends, 5 both ends of rigid support rod conflict cone 4 respectively to the realization is inhaled counteracting of effort to magnetism. In order to make the supporting force of the supporting rod 5 suitable, one end of the supporting rod 5 is provided with a thread, one end of the supporting rod 5 is rotatably connected with the cone 4, the other cone 4 is provided with a supporting position, when the supporting rod 5 can just fall into the supporting position by rotation, the supporting rod 5 can not fall into the supporting position for a long time, and the supporting can not be realized for a short time. Preferably, the cone 4 is a frame structure made of a metal wire. The hanging rod pipe passes through the linear channel and can be subjected to heat treatment in an air-separated mode.

After carburization, spraying a film, namely spraying modified MoS on the surface of the steel material 1₂The spraying thickness is 0.01mm-0.03mm, and then drying is carried out; the molybdenum disulfide is a good solid lubricating material, is suitable for working conditions of low temperature 200 ℃, medium temperature 360 ℃, high load, high rotating speed and chemical corrosion, can play a role in improving the lubricating effect and reducing friction, and the inner surface of the lining is subjected to high-pressure and uniform modification MoS₂Spraying thickness of 0.01-0.03mm, and baking at 70-80 deg.C for 30 min to obtain MoS₂And solidifying the graphite mixture. At the initial stage, when the inner hole of the bushing is coupled with the pin shaft, the bushing can play a good lubricating role, reduce friction, reduce working temperature and prevent locking.

Modified MoS₂Comprises thatMoS₂Tungsten disulfide and aluminum powder, the MoS₂Mechanically mixing tungsten disulfide and aluminum powder to obtain modified MoS₂As a spray powder, the MoS₂The mass ratio of the tungsten disulfide to the aluminum powder is 3-7: 1: 1.

in another embodiment, the modified MoS₂Including MoS₂And the graphite mixture comprises MoS₂Graphene oxide, Mo₂C, mixing MoS₂Adding graphene oxide and N, N-dimethylformamide into a reaction kettle after ultrasonic treatment, heating at 200 ℃ for 10 hours, and adding MoS₂Loaded to reduced graphene oxide to successfully synthesize MoS₂And reducing the mixture of graphene oxide.

In the embodiment, an ultrasonic cleaner is used for deburring to remove edges and sharp corners of the steel material 1. And then, stamping a steel seal on the steel material 1 by adopting a punch.

This embodiment oval oil cave 2 is around 1 axis ring-type setting of steel material, and oval oil cave 2 on the same horizontal plane is the equidistance and distributes, and the crisscross distribution of crossing between two adjacent oval oil caves 2. The lubricating area of the oil cavity accounts for 15-25% of the surface area of the inner diameter, so that the strength and the bearing of the matrix can be ensured, and the lubricating effect is considered; the pin shaft can be divided into three types according to the movement direction of the pin shaft: linear reciprocating, circular swinging or rotating, and linear plus rotating; the movement direction is considered when the oil holes are distributed, no lubrication blind area is ensured during movement, and the condition that the pin shaft and the bush are not lubricated during working, so that the conditions of seizure and shaft locking are caused; need the lubricated maintenance of interstitial nature in the use, improve axle sleeve life.

The area of the oil pocket accounts for 15-20% of the area of the inner wall of the steel material 1.

After the carburization treatment, the depth of a hardened layer is 0.8-1.2mm, and the hardness of the outer surface of the steel material 1 is 56-62 HRC.

The technical indexes of the bearing steel sleeve prepared by the embodiment are as follows: the highest bearing capacity is 250N/mm²Maximum PV value (N/mm)²Ratio m/s) was 1.5, maximum linear velocity 0.1m/s, coefficient of linear expansion 10^-5/℃。

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.