WO2024045008A1 - 一种管螺纹加工组件及加工组件的组装方法 - Google Patents

一种管螺纹加工组件及加工组件的组装方法 Download PDF

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Publication number
WO2024045008A1
WO2024045008A1 PCT/CN2022/116059 CN2022116059W WO2024045008A1 WO 2024045008 A1 WO2024045008 A1 WO 2024045008A1 CN 2022116059 W CN2022116059 W CN 2022116059W WO 2024045008 A1 WO2024045008 A1 WO 2024045008A1
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WIPO (PCT)
Prior art keywords
rolling
rolling wheel
wheel body
bearing
sleeve
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PCT/CN2022/116059
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English (en)
French (fr)
Inventor
周俊
张永良
杨敏君
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上海泛华紧固系统有限公司
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Application filed by 上海泛华紧固系统有限公司 filed Critical 上海泛华紧固系统有限公司
Priority to PCT/CN2022/116059 priority Critical patent/WO2024045008A1/zh
Publication of WO2024045008A1 publication Critical patent/WO2024045008A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H3/00—Making helical bodies or bodies having parts of helical shape
    • B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
    • B21H3/04—Making by means of profiled-rolls or die rolls

Definitions

  • the present invention relates to the technical field of pipe thread processing, and in particular to a pipe thread processing component and an assembly method of the processing component.
  • rolling wheel external threads Compared with external threads of cutting pipes, rolling wheel external threads have significant advantages such as stable quality, good sealing performance and high mechanical connection strength.
  • the first production process is to taper the pipe through a rolling structure
  • the second production process is to roll the tapered part through a rolling structure.
  • Forming treatment In different cold forming process time periods, that is, in the process of taper forming and thread rolling forming, the pressure on the rolling wheel and the rolling wheel will gradually change, and the gradient of the pressure change is different.
  • the cooperation between the pressing wheel and/or the thread rolling wheel and its shaft will cause excessive wear of the mating surface between the pressing wheel and/or the thread rolling wheel and the pipe, and may result in the inability to rotate.
  • the purpose of the present invention is to provide a pipe thread processing component and an assembly method of the processing component.
  • the present invention can slow down the wear and bite of the surfaces of the rolling wheel and the rolling wheel, causing the rolling wheel and the The rolling wheel is damaged to extend the service life of the rolling wheel and rolling wheel.
  • a pipe thread processing assembly including:
  • the rolling wheel includes a rolling wheel body, a rolling bushing and a rolling bearing.
  • the rolling wheel body is an approximately truncated cone-shaped structure.
  • the rolling bushing is installed on the rolling wheel body.
  • the rolling bearing is installed in one end of the upper bottom surface of the rolling wheel body;
  • the rolling wheel includes a rolling wheel body, a rolling bushing and a rolling bearing.
  • the rolling wheel body is an approximately truncated cone-shaped structure, and the rolling bushing is installed on the rolling wheel.
  • the rolling bearing is installed in one end of the upper bottom surface of the wheel body, and the rolling bearing is installed in one end of the lower bottom surface of the rolling wheel body.
  • a plurality of lubrication grooves are provided on the inner wall surface of the rolling sleeve, and a plurality of lubrication grooves are provided on the inner wall surface of the rolling sleeve.
  • the processing assembly further includes:
  • a plurality of rolling wheel axles are provided on the rolling wheel seat, and the rolling wheel is rotatably provided on the rolling wheel axle.
  • the axial installation gap between the rolling sleeve and the rolling wheel shaft is in the range of 0.1 to 0.5 mm.
  • the processing assembly further includes:
  • a plurality of rolling wheel axles are provided on the rolling wheel seat, and the rolling wheel is rotatably installed on the rolling wheel axle.
  • the axial installation gap between the rolling sleeve and the rolling wheel shaft is in the range of 0.1 to 0.5 mm.
  • the rolling sleeve is a copper sleeve
  • the rolling bearing is a flower basket needle roller bearing
  • the rolling sleeve is a copper sleeve
  • the rolling bearing is a flower basket needle roller bearing
  • the invention also provides an assembly method of processing components, which is used in the pipe thread processing component and includes the steps:
  • the present invention provides a pipe thread processing assembly.
  • the rolling sleeve and the thread rolling sleeve bear most of the pressure, and the rolling bearing and the thread rolling bearing play a role in slowing down wear, and then It can protect the structure of the rolling wheel and the thread rolling wheel to extend the service life of the rolling wheel and the thread rolling wheel.
  • Figure 1 shows a schematic structural diagram of the rolling structure in a pipe thread processing assembly of the present invention.
  • Figure 2 shows a schematic structural diagram of a rolling wheel in a pipe thread processing assembly of the present invention.
  • Figure 3 shows an exploded view of a rolling wheel in a pipe thread processing assembly of the present invention.
  • Figure 4 shows a schematic structural diagram of the thread rolling structure in a pipe thread processing assembly of the present invention.
  • Figure 5 shows an exploded view of the thread rolling structure in a pipe thread processing assembly of the present invention.
  • Figure 6 shows a schematic structural diagram of a thread rolling wheel in a pipe thread processing assembly of the present invention.
  • Figure 7 shows an exploded view of a thread rolling wheel in a pipe thread processing assembly of the present invention.
  • Figure 8 shows a schematic diagram of the force on the rolling wheel in a pipe thread processing assembly of the present invention.
  • Figure 9 shows a schematic diagram of the force exerted on the thread rolling wheel in a pipe thread processing assembly of the present invention.
  • Figure 10 shows a flow chart of a method of assembling a processing component according to the present invention.
  • Thread rolling structure 20. Thread rolling wheel seat; 22. Thread rolling wheel; 221. Thread rolling wheel body; 222. Thread rolling bushing; 223. Thread rolling bearing;
  • the present invention provides a pipe thread processing assembly.
  • the processing assembly can process the pipe 30 so that an external pipe thread is formed on the surface of the pipe 30 .
  • the pipe 30 may be a hollow blank that is cold formed.
  • the pipe 30 may not only include metal pipes such as steel pipes, aluminum pipes, copper pipes, etc., but also metal workpieces with hollow tubular partial structures such as pipe joints and tees, and may also include other plastics with similar shapes that can be cold formed.
  • the processing assembly may include a rolling structure 10 and a thread rolling structure 20 .
  • one end of the pipe 30 can be tapered first through the rolling structure 10, so that the outer taper forming part can be formed on one end of the pipe 30, and then the thread rolling structure can be used. 20. Perform thread rolling forming on the tapered part to form external pipe threads on the tapered part.
  • the external pipe thread can be an existing national standard or an international standard or an enterprise standard or an external pipe thread with actual functions.
  • the rolling structure 10 may include a rolling wheel seat 11 and a rolling wheel 12 .
  • the rolling wheel seat 11 can be provided on the main body of the machine base, the rolling wheel seat 11 can be provided with a rolling wheel shaft, and the rolling wheel 12 can be rotated and arranged on the rolling wheel shaft.
  • the number of rolling axles can be multiple, for example, it can be three, four, five, six, etc.
  • a plurality of rolling wheel axles can be provided on the rolling wheel seat 11 .
  • Multiple rolling axles can be arranged on the rolling wheel base 11 along an annular and equal angular distance, and multiple rolling axles can be located on the edge of the same circle.
  • the three rolling axles may form an equilateral triangle, and the rolling axles may be located at the end points of the equilateral triangle.
  • the four rolling axles can form a square, and the rolling axles can be located at the end points of the square. That is, when the number of rolling axles is multiple, the plurality of rolling axles may form a regular polygon shape, and the rolling axles may be located at the end points of the regular polygon.
  • the number of rolling wheels 12 can be the same as the number of rolling axles, that is, one rolling wheel 12 is rotated on each rolling axle.
  • the number of rolling wheels 12 may also be less than the number of rolling axles.
  • the plurality of rolling wheels 12 can form a regular polygon shape, and the axes of the plurality of rolling wheels 12 can be located on the side of the same circle.
  • the rolling wheel 12 may include a rolling wheel body 121 , a rolling sleeve 122 and a rolling bearing 123 .
  • the rolling wheel body 121 may have a truncated cone-shaped structure, and a circular opening is provided in the center thereof.
  • the rolling wheel body 121 may be rotated on the rolling wheel shaft through the circular opening.
  • the rolling sleeve 122 can be a copper sleeve, which can be made of copper alloy materials such as beryllium copper, which has the advantages of high strength, elasticity, hardness, wear resistance, fatigue resistance and heat resistance.
  • the rolling sleeve 122 can be installed in the circular opening of the rolling wheel body 121, and an H7/N6 interference fit can be used between the two.
  • the rolling bushing 122 and the rolling wheel shaft can have a gap fit, and the axial installation gap between the two can be in the range of 0.1 to 0.5mm, for example, 0.1mm, or 0.25mm, or 0.25mm. For example 0.5mm.
  • the rolling bearing 123 can also be installed in the circular opening of the rolling wheel body 121.
  • the rolling bearing 123 can be a flower basket needle roller bearing, which has the advantages of quietness, high speed, and durability.
  • An interference fit can be used between the outer ring of the rolling bearing 123 and the rolling wheel body 121, and an interference fit can also be used between the inner ring of the rolling bearing 123 and the rolling wheel shaft.
  • the rolling sleeve 122 can be located at one end of the lower bottom surface of the rolling wheel body 121 , and the rolling bearing 123 can be located at one end of the upper bottom surface of the rolling wheel body 121 . However, it is not limited thereto.
  • the rolling sleeve 122 may be located at one end of the upper bottom surface of the rolling wheel body 121 , and the rolling bearing 123 may be located at one end of the lower bottom surface of the rolling wheel body 121 .
  • the rolling sleeve 122 can be a sleeve, and the rolling bearing 123 can be a component that fixes and reduces the load friction coefficient during mechanical transmission.
  • the rolling sleeve 122 is the same as the rolling bearing 123 in that both bear the load of the rolling wheel shaft.
  • the difference between the rolling sleeve 122 and the rolling bearing 123 is that the rolling sleeve 122 has an integral structure. When rotating, the rolling axle and the rolling sleeve 122 move relative to each other.
  • the rolling bearing 123 has a split structure. When rotating, the rolling sleeve 122 has a split structure.
  • the inner and outer rings of the pressure bearing 123 move relative to each other.
  • the rolling bushing 122 when the rolling bushing 122 acts between the rolling wheel body 121 and the rolling wheel shaft, the rolling bushing 122 can play a role in fixing and positioning. Function, sliding bearing function, etc., can be used to fix the central positioning of the rolling wheel shaft and prevent the rolling bearing 123 from being displaced due to vibration during operation.
  • the wall thickness of the rolling sleeve 122 can be designed according to the axial load required by the rolling bearing 123 .
  • the rolling sleeve 122 can be made of cast copper or bearing alloy.
  • the rolling sleeve 122 can be divided into an open structure and a non-open structure.
  • the rolling sleeve 122 may have a cylindrical structure.
  • the rolling sleeve 122 can be used to replace rolling bearings in places with low rotation speed, high radial load and high clearance requirements.
  • the material of the rolling sleeve 122 is required to be low hardness and wear-resistant.
  • the inner hole of the rolling sleeve 122 is ground and scraped. , can achieve higher matching accuracy.
  • An oil groove for lubricating oil can be provided on the inner wall of the rolling sleeve 122 to lubricate the rolling sleeve 122.
  • the inner hole wall of the rolling sleeve 122 can be scraped, so that multiple lubrication grooves can be formed on the inner surface of the rolling sleeve 122 to enhance the lubrication function.
  • the shape of the lubrication groove is not limited, and may be, for example, a figure-eight shape, a rectangular shape, or a circular shape, for example.
  • the thread rolling structure 20 may include a thread rolling wheel seat 21 and a thread rolling wheel 22 .
  • the rolling wheel seat 21 can be provided on the main body of the machine base, the rolling wheel seat 21 can be provided with a rolling wheel shaft, and the rolling wheel 22 can be rotated and arranged on the rolling wheel shaft.
  • the number of thread rolling axles can be multiple, for example, it can be three, four, five, six, etc.
  • a plurality of rolling wheel shafts can be provided on the rolling wheel seat 21 .
  • Multiple rolling wheel axles can be arranged on the rolling wheel seat 21 at equal angular intervals along an annular shape, and multiple rolling wheel axles can be located on the edge of the same circle.
  • the three rolling axles may form an equilateral triangle, and the rolling axles may be located at the end points of the equilateral triangle.
  • the number of rolling wheel axles is four, the four rolling wheel axles can form a square, and the rolling wheel axles can be located at the end points of the square. That is, when the number of rolling axles is multiple, the plurality of rolling axles may form a regular polygon shape, and the rolling axles may be located at the end points of the regular polygon.
  • the number of rolling wheels 22 can be the same as the number of rolling wheel axles, that is, one rolling wheel 22 is rotated on each rolling wheel axle.
  • the number of rolling wheels 22 may also be less than the number of rolling wheel shafts.
  • the plurality of rolling wheels 22 can form a regular polygon shape, and the axes of the plurality of rolling wheels 22 can be located on the side of the same circle.
  • the rolling wheel 22 may include a rolling wheel body 221 , a rolling bushing 222 and a rolling bearing 223 .
  • the rolling wheel body 221 may have a truncated cone-shaped structure, and a circular opening is provided in the center part thereof.
  • the rolling wheel body 221 may be rotated on the rolling wheel shaft through the circular opening.
  • the rolling sleeve 222 can be a copper sleeve, which can be made of copper alloy materials such as beryllium copper, which has the advantages of high strength, elasticity, hardness, wear resistance, fatigue resistance, heat resistance and other advantages.
  • the rolling sleeve 222 can be installed in the circular opening of the rolling wheel body 221, and an H7/N6 interference fit can be used between the two.
  • the rolling bushing 222 and the rolling wheel shaft can have a clearance fit, and the axial installation gap between the two can be in the range of 0.1 to 0.5mm, for example, 0.1mm, or 0.25mm, for example. For example, 0.5mm.
  • the rolling bearing 223 can also be installed in the circular opening of the rolling wheel body 221.
  • the rolling bearing 123 can be a flower basket needle roller bearing, which has the advantages of quietness, high speed, and durability.
  • An interference fit can be used between the outer ring of the rolling bearing 123 and the rolling wheel body 121, and an interference fit can also be used between the inner ring of the rolling bearing 123 and the rolling wheel shaft.
  • the rolling sleeve 222 may be located at one end of the lower bottom surface of the rolling wheel body 221 , and the rolling bearing 223 may be located at one end of the upper bottom surface of the rolling wheel body 221 . However, it is not limited thereto.
  • the rolling sleeve 222 may be located at one end of the upper bottom surface of the rolling wheel body 221 , and the rolling bearing 223 may be located at one end of the lower bottom surface of the rolling wheel body 221 .
  • the rolling sleeve 222 can be a sleeve, and the rolling bearing 223 can be a component that fixes and reduces the load friction coefficient during mechanical transmission.
  • the thread rolling sleeve 222 is the same as the thread rolling bearing 223 in that both bear the load of the thread rolling wheel shaft.
  • the difference between the rolling sleeve 222 and the rolling bearing 223 is that the rolling sleeve 222 is an integral structure, and the rolling axle and the rolling sleeve 222 move relative to each other during rotation, while the rolling bearing 223 is a split structure. During rotation, the inner and outer rings of the rolling bearing 223 move relative to each other.
  • the rolling bushing 222 when the rolling bushing 222 acts between the rolling wheel body 221 and the rolling wheel shaft, the rolling bushing 222 can play a fixing role. , positioning function, sliding bearing function, etc., which can be used to fix the central positioning of the rolling wheel shaft and prevent the rolling bearing 223 from being displaced due to vibration during operation.
  • the wall thickness of the rolling sleeve 222 can be designed according to the axial load required by the rolling bearing 223.
  • the rolling bushing 222 can be made of cast copper or bearing alloy.
  • the rolling sleeve 222 can be divided into an open structure and a non-open structure.
  • the rolling bushing 222 may have a cylindrical structure.
  • the rolling bushing 222 can be used to replace rolling bearings in places where the rotational speed is low, the radial load is high and the clearance requirements are high.
  • the material of the rolling bushing 222 is required to have low hardness and wear resistance.
  • the inner hole of the rolling bushing 222 After grinding and scraping, higher matching accuracy can be achieved.
  • An oil groove for lubricating oil can be provided on the inner wall of the rolling sleeve 222 to lubricate the rolling sleeve 222 .
  • the inner hole wall of the thread rolling sleeve 222 can be scraped, which can leave a plurality of lubrication grooves on the inner surface of the thread rolling sleeve 222 to enhance the lubrication function.
  • the shape of the lubrication groove is not limited, and may be, for example, a figure-eight shape, a rectangular shape, or a circular shape, for example.
  • the force borne by the rolling wheel body 121 gradually increases, and The side of the lower bottom surface of the rolling wheel body 121 bears the greatest force, so it is necessary to install the rolling sleeve 122 that can withstand higher pressure on one side of the lower bottom surface of the rolling wheel body 121, and to install the rolling bearing 123 on the side of the lower bottom surface of the rolling wheel body 121. At this time, most of the force borne by the rolling wheel body 121 can be transferred to the rolling sleeve 122 on one side of the upper bottom surface of the rolling wheel body 121 .
  • the pipe 30 begins to contact the rolling wheel 12. As the rolling time prolongs, the pipe 30 gradually feeds axially. The contact area between the pipe 30 and the rolling wheel 12 gradually increases until they are completely fitted, and the taper forming is completed.
  • the pipe 30 begins to contact the rolling wheel 22. As the rolling time prolongs, the pipe 30 is gradually fed axially, and the contact area between the pipe 30 and the rolling wheel 22 gradually increases until they are completely attached. Together, the thread rolling forming is completed. It can be processed by "rolling along the axial and radial mixing directions" or “rolling along the axial and radial mixing directions”.
  • Rolling along the axial and radial mixing direction refers to the relative position between the rolling wheel 12 and/or the rolling wheel 22 and the pipe 30 during the taper forming and thread rolling forming processes.
  • the movement includes simultaneous movement in the axial and radial directions.
  • the relative movement is caused by the rolling wheel 12 and/or the rolling wheel 22 and the pipe 30 spirally rising when the rolling wheel 12 and/or the rolling wheel 22 engage with the pipe 30 to rotate.
  • the angle may be the deflection angle in the vertical direction between the axis of the rolling wheel 12 and/or the rolling wheel 22 and the axis of the pipe 30.
  • the axial component force causes the rolling wheel 12 and/or the rolling wheel 22 to
  • the pipe 30 moves relative to the axial direction, and at the same time, the rolling wheel 12 and/or the thread rolling wheel 22 are fed radially according to certain process requirements to complete the process of taper forming and/or thread rolling forming.
  • the relative motion speed in the radial direction is zero, it is "rolling along the axial direction" or "axial rolling". Therefore, axial rolling is a special case of axial and radial mixed rolling.
  • the rolling sleeve and the thread rolling sleeve bear most of the pressure, and the rolling bearing and the thread rolling bearing play a role in slowing down wear.
  • the action and bite cause damage to the rolling wheel and the thread rolling wheel, thereby protecting the structure of the rolling wheel and the thread rolling wheel to extend the service life of the rolling wheel and the thread rolling wheel.
  • the present invention also provides an assembly method of processing components, which can assemble the processing components.
  • the assembly method may include the following steps:
  • Step S10 Install the rolling bearing 123 on one end of the upper bottom surface of the rolling wheel body 121, and an interference fit is used between the outer ring of the rolling bearing 123 and the rolling wheel body 121;
  • Step S20 Scrape the inner hole wall of the rolling sleeve 122 to generate multiple lubrication grooves
  • Step S30 Install the rolling sleeve 122 on one end of the lower bottom surface of the rolling wheel body 121 by stamping.
  • An H7/N6 interference fit is used between the rolling sleeve 122 and the rolling wheel body 121;
  • Step S40 Apply lubricating oil to the inner hole wall of the rolling sleeve 122 and the rolling bearing 123;
  • Step S50 Install the rolling sleeve 122 and the rolling bearing 123 on the rolling axle of the rolling wheel seat 11 so that the rolling wheel body 121 can rotate on the rolling axle. gap fit;
  • Step S60 Install the thread rolling bearing 223 on one end of the lower bottom surface of the thread rolling wheel body 221, and an interference fit is used between the outer ring of the thread rolling bearing 223 and the thread rolling wheel body 221;
  • Step S70 Scrape the inner hole wall of the thread rolling sleeve 222 to generate multiple lubrication grooves
  • Step S80 Install the rolling bushing 222 on one end of the upper bottom surface of the rolling wheel body 22 by stamping.
  • An H7/N6 interference fit is used between the rolling bushing 222 and the rolling wheel body 22;
  • Step S90 Apply lubricating oil to the inner hole wall of the thread rolling bushing 222 and the thread rolling bearing 223;
  • Step S100 Install the rolling bushing 222 and the rolling bearing 223 on the rolling wheel shaft of the rolling wheel seat 21 so that the rolling wheel body 221 can rotate on the rolling wheel shaft. Clearance fit between wheels and axles.
  • the rolling sleeve and the thread rolling sleeve bear most of the pressure, and the rolling bearing and the thread rolling bearing can slow down the wear. It can protect the structure of the rolling wheel and the thread rolling wheel to extend the service life of the rolling wheel and the thread rolling wheel.

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  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

本发明提供一种管螺纹加工组件，包括：多个滚压轮，所述滚压轮包括滚压轮本体、滚压轴套以及滚压轴承，所述滚压轮本体为近似圆台形结构，所述滚压轴套安装于所述滚压轮本体的下底面的一端内，所述滚压轴承安装于所述滚压轮本体的上底面的一端内；以及多个滚丝轮，所述滚丝轮包括滚丝轮本体、滚丝轴套以及滚丝轴承，所述滚丝轮本体为近似圆台形结构，所述滚丝轴套安装于所述滚丝轮本体的上底面的一端内，所述滚丝轴承安装于所述滚丝轮本体的下底面的一端内。通过本发明公开的一种管螺纹加工组件，能够减缓滚压轮与滚丝轮表面的磨损及咬合造成滚压轮与滚丝轮损坏。

Description

一种管螺纹加工组件及加工组件的组装方法 技术领域
本发明涉及管螺纹加工技术领域，特别是涉及一种管螺纹加工组件及加工组件的组装方法。
背景技术
滚压轮外螺纹相比切削管外螺纹具有质量稳定、密封性能好以及机械连接强度高等显著优点。在管材外螺纹的形成过程中，管材需要经过两次生产工序，第一生产工序是通过滚压结构对管材进行锥度成型处理，第二生产工序是通过滚丝结构对锥度成型的部分进行滚丝成型处理。在不同冷成型工序的工序时间段，即在锥度成型与滚丝成型的过程中，滚压轮与滚丝轮承受的压力会逐渐变化，而且其压力变化梯度是不尽相同的，通过单一滚压轮和/或滚丝轮与其轴的配合，会导致滚压轮和/或滚丝轮与管材的配合面过度磨损，可能出现无法转动的现象。
发明内容
鉴于以上所述现有技术的缺点，本发明的目的在于提供一种管螺纹加工组件及加工组件的组装方法，本发明能够减缓滚压轮与滚丝轮表面的磨损及咬合造成滚压轮与滚丝轮损坏，以提升滚压轮与滚丝轮的使用寿命。
为实现上述目的及其他相关目的，本发明提供一种管螺纹加工组件，包括：
多个滚压轮，所述滚压轮包括滚压轮本体、滚压轴套以及滚压轴承，所述滚压轮本体为近似圆台形结构，所述滚压轴套安装于所述滚压轮本体的下底面的一端内，所述滚压轴承安装于所述滚压轮本体的上底面的一端内；以及
多个滚丝轮，所述滚丝轮包括滚丝轮本体、滚丝轴套以及滚丝轴承，所述 滚丝轮本体为近似圆台形结构，所述滚丝轴套安装于所述滚丝轮本体的上底面的一端内，所述滚丝轴承安装于所述滚丝轮本体的下底面的一端内。
在本发明一实施例中，所述滚压轴套的内壁面上开设有多个润滑凹槽，所述滚丝轴套的内壁面上开设有多个润滑凹槽。
在本发明一实施例中，加工组件还包括：
滚压轮座；以及
多个滚压轮轴，多个所述滚压轮轴设于所述滚压轮座上，所述滚压轮转动设于所述滚压轮轴上。
在本发明一实施例中，所述滚压轮本体与所述滚压轴套之间过盈配合，所述滚压轴套与所述滚压轮轴之间间隙配合，所述滚压轮本体与所述滚压轴承的外圈之间过盈配合，所述滚压轴承的内圈与所述滚压轮轴之间过盈配合。
在本发明一实施例中，所述滚压轴套与所述滚压轮轴之间的轴向安装间隙在0.1～0.5mm的范围之间。
在本发明一实施例中，加工组件还包括：
滚丝轮座；以及
多个滚丝轮轴，多个所述滚丝轮轴设于所述滚丝轮座上，所述滚丝轮转动设于所述滚丝轮轴上。
在本发明一实施例中，所述滚丝轮本体与所述滚丝轴套之间过盈配合，所述滚丝轴套与所述滚丝轮轴之间间隙配合，所述滚丝轮本体与所述滚丝轴承之间过盈配合，所述滚丝轴承的内圈与所述滚丝轮轴之间过盈配合。
在本发明一实施例中，所述滚丝轴套与所述滚丝轮轴之间的轴向安装间隙在0.1～0.5mm的范围之间。
在本发明一实施例中，所述滚压轴套为铜套，所述滚压轴承为花篮滚针轴 承，所述滚丝轴套为铜套，所述滚丝轴承为花篮滚针轴承。
本发明还提供一种加工组件的组装方法，应用在所述的管螺纹加工组件中，包括步骤：
将所述滚压轴承安装在所述滚压轮本体的上底面的一端；
将所述滚压轴套安装在所述滚压轮本体的下底面的一端；
将所述滚丝轴承安装在所述滚丝轮本体的下底面的一端；以及
将所述滚丝轴套安装在所述滚丝轮本体的上底面的一端。
如上所述，本发明提供一种管螺纹加工组件，在管材加工过程中，通过滚压轴套与滚丝轴套承担大部分压力，通过滚压轴承与滚丝轴承起到减缓磨损的作用，进而能够对滚压轮与滚丝轮的结构进行保护，以延长滚压轮与滚丝轮的使用寿命。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例描述所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1显示为本发明的一种管螺纹加工组件中滚压结构的结构示意图。
图2显示为本发明的一种管螺纹加工组件中滚压轮的结构示意图。
图3显示为本发明的一种管螺纹加工组件中滚压轮的爆炸图。
图4显示为本发明的一种管螺纹加工组件中滚丝结构的结构示意图。
图5显示为本发明的一种管螺纹加工组件中滚丝结构的爆炸图。
图6显示为本发明的一种管螺纹加工组件中滚丝轮的结构示意图。
图7显示为本发明的一种管螺纹加工组件中滚丝轮的爆炸图。
图8显示为本发明的一种管螺纹加工组件中滚压轮受力示意图。
图9显示为本发明的一种管螺纹加工组件中滚丝轮受力示意图。
图10显示为本发明的一种加工组件的组装方法的流程图。
元件标号说明：
10、滚压结构；11、滚压轮座；12、滚压轮；121、滚压轮本体；122、滚压轴套；123、滚压轴承；
20、滚丝结构；21、滚丝轮座；22、滚丝轮；221、滚丝轮本体；222、滚丝轴套；223、滚丝轴承；
30、管材。
具体实施方式
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，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请参阅图1、图4所示，本发明提供了一种管螺纹加工组件，加工组件可以对管材30进行加工，以使管材30的表面形成管外螺纹。管材30可以是进行冷成形加工的空心毛坯。管材30不仅可以包括钢管、铝管、铜管等金属管材，也可以包括管接头、三通等具有中空管状部分结构的金属工件，还可以包括具有类似形状，并可进行冷成形加工的其他塑料管材或工件。加工组件可以包括滚压结构10与滚丝结构20。在管材30的管外螺纹的加工过程中，可以先通过滚压结构10对管材30的一端进行锥度成型处理，以使对管材30的一端能够形成管外锥度成形部分，之后可通过滚丝结构20对锥度成型的部分进行滚丝成型处 理，以使锥度部分上形成管外螺纹。管外螺纹可以是现有国家标准或国际标准或企业标准或具有实际使用功能的管外螺纹。
请参阅图1所示，在本发明的一个实施例中，滚压结构10可以包括滚压轮座11、滚压轮12。其中，滚压轮座11可设于机座主体上，滚压轮座11上可设有滚压轮轴，滚压轮12可以转动设置在滚压轮轴上。滚压轮轴的数量可以为多个，例如可以为三个、四个、五个、六个等。多个滚压轮轴可以设于滚压轮座11上。多个滚压轮轴可以沿环形等角度间距设置在滚压轮座11上，多个滚压轮轴可以位于同一个圆的边上。例如，当滚压轮轴的数量为三个时，三个滚压轮轴可以形成一个正三角形，滚压轮轴可以位于该正三角形的端点上。又例如，当滚压轮轴的数量为四个时，四个滚压轮轴可以形成一个正方形，滚压轮轴可以位于该正方形的端点上。即，当滚压轮轴的数量为多个时，多个滚压轮轴可以形成一个正多边形的形状，滚压轮轴可以位于该正多边形的端点上。滚压轮12的数量可以与滚压轮轴的数量相同，即每个滚压轮轴上都转动设有一个滚压轮12。然不限于此，滚压轮12的数量也可少于滚压轮轴的数量。多个滚压轮12可以形成一个正多边形的形状，多个滚压轮12的轴心可以位于同一个圆的边上。
请参阅图2及图3所示，在本发明的一个实施例中，滚压轮12可以包括滚压轮本体121、滚压轴套122以及滚压轴承123。滚压轮本体121可以为圆台形结构，且其中心部分开设有圆形开口，滚压轮本体121可通过圆形开口转动设于滚压轮轴上。滚压轴套122可以为铜套，其可以使用铍铜等铜合金材料，其具有很高的强度、弹性、硬度、耐磨性、耐疲劳以及耐热性等优点。滚压轴套122可以安装在滚压轮本体121的圆形开口内，两者之间可以采用H7/N6的过盈配合。滚压轴套122与滚压轮轴之间可以间隙配合，两者之间的轴向安装间 隙可以在0.1～0.5mm的范围之间，可以为例如0.1mm，也可以为例如0.25mm，还可以为例如0.5mm。滚压轴承123也可以安装在滚压轮本体121的圆形开口内。滚压轴承123可以采用花篮滚针轴承，其具有安静、高速、耐用等优点。滚压轴承123的外圈与滚压轮本体121之间可以采用过盈配合，滚压轴承123的内圈与滚压轮轴之间也可以采用过盈配合。滚压轴套122可以位于滚压轮本体121的下底面的一端，滚压轴承123可以位于滚压轮本体121的上底面的一端。然不限于此，滚压轴套122可以位于滚压轮本体121的上底面的一端，滚压轴承123可以位于滚压轮本体121的下底面的一端。其中，滚压轴套122可以是套筒，滚压轴承123可以是在机械传动过程中起固定和减小载荷摩擦系数的部件。滚压轴套122与滚压轴承123的相同之处在于，两者都承受滚压轮轴的载荷。滚压轴套122与滚压轴承123的不同之处在于，滚压轴套122是整体结构，转动时滚压轮轴和滚压轴套122之间相对运动，滚压轴承123是分体结构，转动时滚压轴承123自身的内外圈相对运动。
请参阅图2及图3所示，在本发明的一个实施例中，当滚压轴套122作用在滚压轮本体121与滚压轮轴之间时，滚压轴套122可以起到固定作用、定位作用、滑动轴承作用等，可以用来固定滚压轮轴的中心定位和滚压轴承123不让其因为运转时振动而发生移位。为了节约材料，可以根据滚压轴承123需要的轴向载荷设计滚压轴套122的壁厚。滚压轴套122可以选用铸铜和轴承合金材质。滚压轴套122可以分为开口结构和不开口结构。当滚压轴套122不能承受轴向载荷，或只能承受较小的轴向载荷或加推力轴承时，滚压轴套122可以为圆柱形结构。滚压轴套122可以在一些转速较低，径向载荷较高且间隙要求较高的地方用来替代滚动轴承，滚压轴套122的材料要求硬度低且耐磨，滚压轴套122内孔经研磨刮削，能达到较高配合精度。滚压轴套122的内壁上可以 设置有润滑油的油槽，以对滚压轴套122进行润滑。例如在安装滚压轴套122时，可以刮削滚压轴套122的内孔壁，这样可以在滚压轴套122的内表面形成多个润滑凹槽，以增强润滑功能。润滑凹槽的形状可以不加限制，可以为例如8字形形状，也可以为例如矩形形状，还可以为例如圆形形状。
请参阅图4及图5所示，在本发明的一个实施例中，滚丝结构20可以包括滚丝轮座21、滚丝轮22。其中，滚丝轮座21可设于机座主体上，滚丝轮座21上可设有滚丝轮轴，滚丝轮22可以转动设置在滚压轮轴上。滚丝轮轴的数量可以为多个，例如可以为三个、四个、五个、六个等。多个滚丝轮轴可以设于滚丝轮座21上。多个滚丝轮轴可以沿环形等角度间距设置在滚丝轮座21上，多个滚丝轮轴可以位于同一个圆的边上。例如，当滚丝轮轴的数量为三个时，三个滚丝轮轴可以形成一个正三角形，滚丝轮轴可以位于该正三角形的端点上。又例如，当滚丝轮轴的数量为四个时，四个滚丝轮轴可以形成一个正方形，滚丝轮轴可以位于该正方形的端点上。即，当滚丝轮轴的数量为多个时，多个滚丝轮轴可以形成一个正多边形的形状，滚丝轮轴可以位于该正多边形的端点上。滚丝轮22的数量可以与滚丝轮轴的数量相同，即每个滚丝轮轴上都转动设有一个滚丝轮22。然不限于此，滚丝轮22的数量也可少于滚丝轮轴的数量。多个滚丝轮22可以形成一个正多边形的形状，多个滚丝轮22的轴心可以位于同一个圆的边上。
请参阅图6及图7所示，在本发明的一个实施例中，滚丝轮22可以包括滚丝轮本体221、滚丝轴套222以及滚丝轴承223。滚丝轮本体221可以为圆台形结构，且其中心部分开设有圆形开口，滚丝轮本体221可通过圆形开口转动设于滚丝轮轴上。滚丝轴套222可以为铜套，其可以使用铍铜等铜合金材料，其具有很高的强度、弹性、硬度、耐磨性、耐疲劳以及耐热性等优点。滚丝轴套 222可以安装在滚丝轮本体221的圆形开口内，两者之间可以采用H7/N6的过盈配合。滚丝轴套222与滚丝轮轴之间可以间隙配合，两者之间的轴向安装间隙可以在0.1～0.5mm的范围之间，可以为例如0.1mm，也可以为例如0.25mm，还可以为例如0.5mm。滚丝轴承223也可以安装在滚丝轮本体221的圆形开口内。滚压轴承123可以采用花篮滚针轴承，其具有安静、高速、耐用等优点。滚压轴承123的外圈与滚压轮本体121之间可以采用过盈配合，滚压轴承123的内圈与滚丝轮轴之间也可以采用过盈配合。滚丝轴套222可以位于滚丝轮本体221的下底面的一端，滚丝轴承223可以位于滚丝轮本体221的上底面的一端。然不限于此，滚丝轴套222可以位于滚丝轮本体221的上底面的一端，滚丝轴承223可以位于滚丝轮本体221的下底面的一端。其中，滚丝轴套222可以是套筒，滚丝轴承223可以是在机械传动过程中起固定和减小载荷摩擦系数的部件。滚丝轴套222与滚丝轴承223的相同之处在于，两者都承受滚丝轮轴的载荷。滚丝轴套222与滚丝轴承223的不同之处在于，滚丝轴套222是整体结构，转动时滚丝轮轴和滚丝轴套222之间相对运动，滚丝轴承223是分体结构，转动时滚丝轴承223自身的内外圈相对运动。
请参阅图6及图7所示，在本发明的一个实施例中，当滚丝轴套222作用在滚丝轮本体221与滚丝轮轴之间时，滚丝轴套222可以起到固定作用、定位作用、滑动轴承作用等，可以用来固定滚丝轮轴的中心定位和滚丝轴承223不让其因为运转时振动而发生移位。为了节约材料，可以根据滚丝轴承223需要的轴向载荷设计滚丝轴套222的壁厚。滚丝轴套222可以选用铸铜和轴承合金材质。滚丝轴套222可以分为开口结构和不开口结构。当滚丝轴套222不能承受轴向载荷，或只能承受较小的轴向载荷或加推力轴承时，滚丝轴套222可以为圆柱形结构。滚丝轴套222可以在一些转速较低，径向载荷较高且间隙要求 较高的地方用来替代滚动轴承，滚丝轴套222的材料要求硬度低且耐磨，滚丝轴套222内孔经研磨刮削，能达到较高配合精度。滚丝轴套222的内壁上可以设置有润滑油的油槽，以对滚丝轴套222进行润滑。例如在安装滚丝轴套222时，可以刮削滚丝轴套222的内孔壁，这样可以在滚丝轴套222的内表面留下多个润滑凹槽，以增强润滑功能。润滑凹槽的形状可以不加限制，可以为例如8字形形状，也可以为例如矩形形状，还可以为例如圆形形状。
请参阅图8及图9所示，在本发明的一个实施例中，在管材30一端形成管外锥度成形部分的过程中，由于滚压轮本体121承受的作用力是逐渐增大的，且滚压轮本体121的下底面的一侧受力最大，因此需要将能够承受较高压力的滚压轴套122设于滚压轮本体121的下底面的一侧，将滚压轴承123设于滚压轮本体121的上底面的一侧，此时可以将滚压轮本体121承受的大部分作用力转移至滚压轴套122上。在对管材30锥度成型的部分进行滚丝成型处理的过程中，滚丝轮本体221与管材30接触时，管材30会与滚丝轮本体221上的滚丝轮螺纹进行对牙，此时滚丝轮本体221的上底面的一侧受力最大，因此需要将能够承受较高压力的滚丝轴套222设于滚丝轮本体221的上底面的一侧，将滚丝轴承223设于滚丝轮本体221的下底面的一侧，此时可以将滚丝轮本体221承受的大部分作用力转移至滚丝轴套222上。
请参阅图8及图9所示，在本发明的一个实施例中，在锥度成形的过程中，管材30开始接触滚压轮12，随着滚压时间延长，管材30逐步轴向进给，管材30与滚压轮12之间接触面积逐步增加，直至完全贴合，完成锥度成形。在滚丝成型的过程中，管材30开始接触滚丝轮22，随着滚丝时间延长，管材30逐步轴向进给，有管材30与滚丝轮22之间接触面积逐步增加，直至完全贴合，完成滚丝成型。可以采用“沿轴向径向混合方向滚压”或者“轴向径向混合滚压” 进行处理。“沿轴向径向混合方向滚压”或者“轴向径向混合滚压”是指在锥度成形与滚丝成型的过程中，滚压轮12和/或滚丝轮22与管材30的相对运动包括轴向和径向方向的同时运动，该相对运动是滚压轮12和/或滚丝轮22与管材30咬合旋转时利用滚压轮12和/或滚丝轮22与管材30螺旋升角或者是滚压轮12和/或滚丝轮22的轴心线与管材30的轴心线在垂直方向的偏向角产生的轴向分力使滚压轮12和/或滚丝轮22与管材30产生相对的轴向移动，同时滚压轮12和/或滚丝轮22按一定工艺要求径向进给以完成锥度成形和/或滚丝成型的工艺。当径向方向的相对运动速度为零时，即“沿轴向方向滚压”或者“轴向滚压”，因此，轴向滚压是轴向径向混合滚压的特例。
综上所述，通过本发明提供的一种管螺纹加工组件，在管材加工过程中，通过滚压轴套与滚丝轴套承担大部分压力，通过滚压轴承与滚丝轴承起到减缓磨损的作用及咬合造成滚压轮与滚丝轮损坏，进而能够对滚压轮与滚丝轮的结构进行保护，以延长滚压轮与滚丝轮的使用寿命。
请参阅图10所示，本发明还提供了一种加工组件的组装方法，其可对加工组件进行组装，组装方法可以包括如下步骤：
步骤S10、将滚压轴承123安装在滚压轮本体121的上底面的一端，滚压轴承123的外圈与滚压轮本体121之间采用过盈配合；
步骤S20、对滚压轴套122的内孔壁进行刮削处理，以生成多个润滑凹槽；
步骤S30、将滚压轴套122通过冲压的方式安装在滚压轮本体121的下底面的一端，滚压轴套122与滚压轮本体121之间采用H7/N6的过盈配合；
步骤S40、向滚压轴套122的内孔壁与滚压轴承123上涂抹润滑油；
步骤S50、将滚压轴套122与滚压轴承123安装在滚压轮座11的滚压轮轴上，以使滚压轮本体121能够在滚压轮轴上转动，滚压轴套122与滚压轮轴之 间间隙配合；
步骤S60、将滚丝轴承223安装在滚丝轮本体221的下底面的一端，滚丝轴承223的外圈与滚丝轮本体221之间采用过盈配合；
步骤S70、对滚丝轴套222的内孔壁进行刮削处理，以生成多个润滑凹槽；
步骤S80、将滚丝轴套222通过冲压的方式安装在滚丝轮本体22的上底面的一端，滚丝轴套222与滚丝轮本体22之间采用H7/N6的过盈配合；
步骤S90、向滚丝轴套222的内孔壁与滚丝轴承223上涂抹润滑油；
步骤S100、将滚丝轴套222与滚丝轴承223安装在滚丝轮座21的滚丝轮轴上，以使滚丝轮本体221能够在滚丝轮轴上转动，滚丝轴套222与滚丝轮轴之间间隙配合。
综上所述，通过本发明提供的一种加工组件的组装方法，在管材加工过程中，通过滚压轴套与滚丝轴套承担大部分压力，通过滚压轴承与滚丝轴承起到减缓磨损的作用，进而能够对滚压轮与滚丝轮的结构进行保护，以延长滚压轮与滚丝轮的使用寿命。
在本说明书的描述中，参考术语“本实施例”、“示例”、“具体示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上公开的本发明实施例只是用于帮助阐述本发明。实施例并没有详尽叙述所有的细节，也不限制该发明仅为所述的具体实施方式。显然，根据本说明书的内容，可作很多的修改和变化。本说明书选取并具体描述这些实施例，是为了更好地解释本发明的原理和实际应用，从而使所属技术领域技术人员能很 好地理解和利用本发明。本发明仅受权利要求书及其全部范围和等效物的限制。

Claims (10)

  1. 一种管螺纹加工组件，其特征在于，包括：
    多个滚压轮，所述滚压轮包括滚压轮本体、滚压轴套以及滚压轴承，所述滚压轮本体为近似圆台形结构，所述滚压轴套安装于所述滚压轮本体的下底面的一端内，所述滚压轴承安装于所述滚压轮本体的上底面的一端内；以及
    多个滚丝轮，所述滚丝轮包括滚丝轮本体、滚丝轴套以及滚丝轴承，所述滚丝轮本体为近似圆台形结构，所述滚丝轴套安装于所述滚丝轮本体的上底面的一端内，所述滚丝轴承安装于所述滚丝轮本体的下底面的一端内。
  2. 根据权利要求1所述的管螺纹加工组件，其特征在于，所述滚压轴套的内壁面上开设有多个润滑凹槽，所述滚丝轴套的内壁面上开设有多个润滑凹槽。
  3. 根据权利要求1所述的管螺纹加工组件，其特征在于，还包括：
    滚压轮座；以及
    多个滚压轮轴，多个所述滚压轮轴设于所述滚压轮座上，所述滚压轮转动设于所述滚压轮轴上。
  4. 根据权利要求3所述的管螺纹加工组件，其特征在于，所述滚压轮本体与所述滚压轴套之间过盈配合，所述滚压轴套与所述滚压轮轴之间间隙配合，所述滚压轮本体与所述滚压轴承的外圈之间过盈配合，所述滚压轴承的内圈与所述滚压轮轴之间过盈配合。
  5. 据权利要求4所述的管螺纹加工组件，其特征在于，所述滚压轴套与所述滚压轮轴之间的轴向安装间隙在0.1～0.5mm的范围之间。
  6. 根据权利要求1所述的管螺纹加工组件，其特征在于，还包括：
    滚丝轮座；以及
    多个滚丝轮轴，多个所述滚丝轮轴设于所述滚丝轮座上，所述滚丝轮转动设于所述滚丝轮轴上。
  7. 根据权利要求6所述的管螺纹加工组件，其特征在于，所述滚丝轮本体与所述滚丝轴套之间过盈配合，所述滚丝轴套与所述滚丝轮轴之间间隙配合，所述滚丝轮本体与所述滚丝轴承之间过盈配合，所述滚丝轴承的内圈与所述滚丝 轮轴之间过盈配合。
  8. 据权利要求7所述的管螺纹加工组件，其特征在于，所述滚丝轴套与所述滚丝轮轴之间的轴向安装间隙在0.1～0.5mm的范围之间。
  9. 根据权利要求1所述的管螺纹加工组件，其特征在于，所述滚压轴套为铍铜铜套，所述滚压轴承为花篮滚针轴承，所述滚丝轴套为铍铜铜套，所述滚丝轴承为花篮滚针轴承。
  10. 一种加工组件的组装方法，应用在如权利要求1所述的管螺纹加工组件中，其特征在于，包括步骤：
    将所述滚压轴承安装在所述滚压轮本体的上底面的一端；
    将所述滚压轴套安装在所述滚压轮本体的下底面的一端；
    将所述滚丝轴承安装在所述滚丝轮本体的下底面的一端；以及
    将所述滚丝轴套安装在所述滚丝轮本体的上底面的一端。
PCT/CN2022/116059 2022-08-31 2022-08-31 一种管螺纹加工组件及加工组件的组装方法 WO2024045008A1 (zh)

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JPH07217652A (ja) * 1994-01-31 1995-08-15 Nippon Bearing Kk ベアリング装置
CN2414867Y (zh) * 2000-03-16 2001-01-17 胡海涛 轮座式螺纹滚压装置
CN2690073Y (zh) * 2004-04-06 2005-04-06 刘树铭 一种钢筋剥肋直螺纹滚丝机头
CN201768860U (zh) * 2010-08-20 2011-03-23 鞍钢重型机械有限责任公司 螺纹滚压器
CN205173212U (zh) * 2015-10-30 2016-04-20 东莞市泰基山机械设备有限公司 一种高速精密冲床的曲轴转动机构
CN107061499A (zh) * 2017-06-16 2017-08-18 常州市良久机械制造有限公司 一种轴套
CN109779906A (zh) * 2019-03-14 2019-05-21 西安交通大学 一种具有密封作用的双螺杆压缩机径向轴承组合结构

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07217652A (ja) * 1994-01-31 1995-08-15 Nippon Bearing Kk ベアリング装置
CN2414867Y (zh) * 2000-03-16 2001-01-17 胡海涛 轮座式螺纹滚压装置
CN2690073Y (zh) * 2004-04-06 2005-04-06 刘树铭 一种钢筋剥肋直螺纹滚丝机头
CN201768860U (zh) * 2010-08-20 2011-03-23 鞍钢重型机械有限责任公司 螺纹滚压器
CN205173212U (zh) * 2015-10-30 2016-04-20 东莞市泰基山机械设备有限公司 一种高速精密冲床的曲轴转动机构
CN107061499A (zh) * 2017-06-16 2017-08-18 常州市良久机械制造有限公司 一种轴套
CN109779906A (zh) * 2019-03-14 2019-05-21 西安交通大学 一种具有密封作用的双螺杆压缩机径向轴承组合结构

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