WO2022166016A1 - 一种气浮主轴和车床 - Google Patents

一种气浮主轴和车床 Download PDF

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Publication number
WO2022166016A1
WO2022166016A1 PCT/CN2021/092499 CN2021092499W WO2022166016A1 WO 2022166016 A1 WO2022166016 A1 WO 2022166016A1 CN 2021092499 W CN2021092499 W CN 2021092499W WO 2022166016 A1 WO2022166016 A1 WO 2022166016A1
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Prior art keywords
assembly
air
bearing
thrust bearing
shaft
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PCT/CN2021/092499
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English (en)
French (fr)
Inventor
张翰乾
赵聪
汤丽君
汤秀清
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广州市昊志机电股份有限公司
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Publication of WO2022166016A1 publication Critical patent/WO2022166016A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention is used in the field of turning, in particular to an air-floating spindle and a lathe.
  • the air-bearing spindle Because of the error homogenization phenomenon of the air-bearing spindle, as well as low friction and low loss, the air-bearing spindle has become one of the best carriers for ultra-precision machining. In the process of lathe processing, due to the large processing feed, extremely high requirements are often placed on the axial stiffness and bearing capacity of the workpiece shaft. However, because most of the ultra-precision air-bearing spindles have insufficient bearing capacity, it greatly affects the processing efficiency and processing range, and is difficult to use as a lathe workpiece shaft.
  • the purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide an air-floating spindle and a lathe, taking into account the radial accuracy of the air-bearing bearing and the axial rigidity of the thrust bearing structure, while ensuring ultra-precision machining. At the same time, it is also suitable for occasions requiring large bearing capacity and large overturning moment.
  • an air flotation spindle includes:
  • the shaft core assembly is supported on the body assembly through a bearing assembly, the lower end of the shaft core assembly is provided with a ball head, the shaft core assembly is provided with a flying disc above the ball head, and the flying disc is connected to the ball head Connected by cylindrical surfaces extending in the axial direction;
  • the bearing assembly includes an air bearing assembly and a thrust bearing
  • the air bearing assembly has a spherical portion matched with the ball head, a cylindrical portion matched with the cylindrical surface, and matched with the lower end surface of the flying disc
  • the flange part of the air bearing assembly, the spherical part, the cylindrical part and the flange part of the air bearing assembly are all provided with air outlet holes
  • the thrust bearing is supported on the upper end surface of the flying disc
  • the thrust bearing includes a thrust bearing seat and a rolling bearing. body.
  • the spherical surface of the air bearing assembly is provided with a shaft hole
  • the spherical head of the shaft core assembly is provided with an output shaft
  • the output shaft is formed by the The shaft hole is pierced.
  • the output shaft is provided with a threaded interface.
  • the air bearing assembly is embedded in the inner hole of the body assembly, and the body assembly is provided with a Gas line.
  • the thrust bearing seat is provided with a ball raceway
  • the thrust bearing further includes a cage
  • the cage is connected to the thrust bearing seat connected, and the rolling elements are confined between the thrust bearing seat and the flying disc.
  • a motor assembly is further included above the thrust bearing, the motor assembly includes a stator and a rotor, and the stator is disposed on the body assembly , the rotor is arranged on the shaft core assembly.
  • a top cover assembly is provided on the upper end of the body component, and the top cover component closes the top inner hole of the body component.
  • the body assembly is provided with a cooling medium flow channel.
  • a second aspect provides a lathe, comprising the air-floating spindle described in any one of the implementations of the first aspect.
  • the bearing capacity, bearing rigidity and machining accuracy of the air bearing spindle are significantly improved, wherein the spherical surface, the cylindrical surface and the flange part of the air bearing assembly are
  • the formation of a three-support bearing group structure, the three-support bearing group structure and the air-floating-thrust bearing composite motion structure ensure a substantial increase in the bearing capacity and bearing stiffness of the spindle, and on the other hand, it also allows the workpiece shaft of the lathe to obtain extremely high performance. High machining accuracy, to achieve the machining effect of car belt grinding. Taking into account the radial accuracy of the air bearing and the axial rigidity of the thrust bearing structure, it is also suitable for occasions requiring large bearing capacity and large overturning moment while ensuring ultra-precision machining.
  • FIG. 1 is a schematic structural diagram of an embodiment of the air flotation spindle of the present invention.
  • words such as “setting”, “installing” and “connecting” should be understood in a broad sense, for example, it may be directly connected or indirectly connected through an intermediate medium; it may be a fixed connection or a
  • the detachable connection can also be integrally formed; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be the internal communication between the two elements or the interaction relationship between the two elements.
  • FIG. 1 shows the reference direction coordinate system of the embodiment of the present invention, and the following describes the embodiment of the present invention with reference to the directions shown in FIG. 1 .
  • an embodiment of the present invention provides an air-floating main shaft, including a body assembly 1 and a shaft core assembly 2, the shaft core assembly 2 is supported on the body assembly 1 through a bearing assembly, and the lower end of the shaft core assembly 2 is provided with a ball head 21.
  • the ball head 21 forms a dome at the lower end of the shaft core assembly.
  • the shaft core assembly 2 is provided with a flying disc 22 above the ball head 21.
  • the flying disc 22 and the ball head 21 are connected by an axially extending cylindrical surface.
  • the air-bearing spindle outputs power at the front end, and the air-bearing spindle can be connected with turning tools and other tools at the front end as required to realize turning and other processing.
  • the bearing assembly includes an air bearing assembly 3 and a thrust bearing 4 .
  • the air bearing assembly 3 has a spherical portion 31 matched with the ball head 21 , a cylindrical portion 32 matched with the cylindrical surface, and the lower end surface of the flying disc 22 .
  • the matching flange part 33, the spherical part 31, the cylindrical part 32 and the flange part 33 of the air bearing assembly 3 are all provided with air outlet holes, and the spherical part 31 and the cylindrical part 32 are transitionally connected to form a U-shaped inner cavity,
  • the spherical portion 31 , the cylindrical portion 32 and the flange portion 33 of the air bearing assembly 3 form a three-support bearing group structure, which can provide radial and axial support forces for the shaft assembly.
  • the thrust bearing 4 is supported on the upper end surface of the flying disc 22 , and the thrust bearing 4 includes a thrust bearing seat 41 and rolling elements 42 .
  • the high-pressure pure gas enters the air bearing assembly 3.
  • the upper and lower supporting surfaces of the U-shaped air bearing assembly 3 suspend the shaft core assembly 2 and stand against the thrust bearing 4.
  • the shaft core assembly 2 is supported together with the air bearing assembly 3, and the shaft core assembly 2 can run freely under the driving of the motor.
  • the air-floating spindle of the present invention is mainly applied to the workpiece shaft in lathe processing, and has high precision (turning surface roughness below 10nm, radial rotation accuracy below 12.5nm), large bearing capacity (axial bearing capacity above 5000N), high rigidity (Axial stiffness is above 800N.m), high overturning moment and other characteristics, the high rotation accuracy of this spindle ensures that turning machining can reach grinding accuracy (roundness below 0.2um).
  • it has the characteristics of ultra-high machining accuracy, and can achieve the processing effect of "grinding with lathe”.
  • it Compared with other ultra-precision air-floating spindles, it has higher bearing capacity and rigidity, which can greatly expand the air-floating spindle.
  • the machining range of the spindle is mainly applied to the workpiece shaft in lathe processing, and has high precision (turning surface roughness below 10nm, radial rotation accuracy below 12.5nm), large bearing capacity (axial bearing capacity above 5000N), high rigidity (A
  • the spherical surface 31 of the air bearing assembly 3 is provided with a shaft hole
  • the ball head 21 of the shaft core assembly 2 is provided with an output shaft 23
  • the output shaft 23 is coaxial with the shaft core assembly 2
  • the output shaft 23 is penetrated by the shaft hole Out
  • the output shaft 23 can be connected with the turning tool.
  • the output shaft 23 is provided with a threaded interface, which is connected to a workpiece to be machined by a lathe, and the turning process can be completed.
  • the external air source can directly enter the air bearing assembly 3, or can also enter the air bearing assembly 3 through the air path of the body assembly 1.
  • the air bearing assembly 3 is embedded in the body.
  • the body assembly 1 In the inner hole of the assembly 1, the body assembly 1 is provided with an air passage 11 which communicates with the air outlet.
  • the high-pressure pure air source enters the spherical portion 31, cylindrical portion 32 and flange portion 33 of the air bearing assembly 3 respectively through the air passage 11, and the air flow passes through the porous bearing to support the shaft core assembly 2 inside.
  • the thrust bearing seat 41 is provided with a ball raceway
  • the thrust bearing 4 further includes a cage, which is connected to the thrust bearing seat 41 and evenly defines the rolling elements 42 between the thrust bearing seat 41 and the flying disc 22 .
  • the rolling body 42 rolls in the cage groove, and the rolling body 42 supports the other side of the flying disc 22 of the shaft core assembly to ensure the free running of the shaft core.
  • a ball raceway matched with the rolling elements 42 may also be provided on the upper surface of the flying disc 22 .
  • the thrust bearing 4 with the raceway structure is formed by the thrust bearing seat 41 , the rolling body 42 and the flying disc 22 , the structure is more simplified, and the axial dimension of the main shaft is reduced.
  • the porous bearing is used as the support carrier of the air-floating spindle to ensure higher bearing capacity.
  • the U-shaped bottom and flange position of the air-bearing bearing can provide higher radial one-way bearing capacity, and the other side adopts the ball slideway.
  • the structure ensures double-sided bearing, and the double-sided insurance makes the axial bearing capacity of the spindle up to 5000N or more, and the radial stiffness can reach more than 800N.m, which can fully meet the processing requirements of the normal lathe workpiece shaft.
  • the air-floating spindle further includes a motor assembly located above the thrust bearing 4 , and the motor assembly is directly connected with the shaft core assembly 2 , that is, the motor assembly includes a stator 51 and a rotor 52 , and the stator 51 is disposed on the body assembly. 1.
  • the rotor 52 is arranged on the shaft core assembly 2 .
  • the upper end of the body assembly 1 is provided with a top cover assembly 6, and the top cover assembly 6 closes the top inner hole of the body assembly 1 to prevent impurities from entering the interior of the body assembly 1, causing the motor, the thrust bearing 4 and the air bearing assembly. 3 failures.
  • the body assembly 1 is provided with a cooling medium flow channel, and the cooling water enters the body assembly 1 and the thrust bearing 4 sequentially through the top cover assembly 6 to circulate and cool the entire main shaft.
  • the invention can also take into account high rigidity, high bearing capacity and high overturning moment, the invention innovatively uses the axial three-support bearing group structure and the air-floating-raceway composite motion structure to ensure The spindle not only meets nano-level ultra-precision machining, but also makes the entire shaft system have extremely high bearing capacity and rigidity.
  • the invention innovatively uses a three-support bearing group structure, so that the main shaft can still ensure great rigidity and bearing capacity under the condition of using air bearing, and it also ensures that the main shaft operates under long-term and high-load operation. stability.
  • the present invention uses a new air-floating-raceway composite motion structure, which can still meet the nano-level rotation accuracy and nano-level turning roughness on the basis of ensuring the high rigidity and high overturning moment of the entire shaft system of the main shaft. requirements, making it possible to use the ultra-precision air-bearing spindle as the workpiece axis of the lathe.
  • Embodiments of the present invention also provide a lathe, including the air-floating spindle of any of the above embodiments.
  • the axial three-support bearing set specially designed for the ultra-precision workpiece shaft ensures that the axial rigidity can reach more than 800N.m during processing, and the axial bearing capacity can reach more than 5000N; the unique air-floating-raceway combined motion structure ensures The turning surface roughness of less than 10nm, the radial rotation accuracy of less than 12.5nm and the strong anti-overturning moment under the spindle machining state. .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

一种气浮主轴和车床，包括：机体组件（1）；轴芯组件（2），通过轴承组件支承于机体组件（1），轴芯组件（2）的下端设有球头（21），轴芯组件（2）于球头（21）的上方设有飞盘（22），飞盘（22）与球头（21）通过沿轴向延伸的圆柱面相衔接；其中，轴承组件包括气浮轴承组件（3）和推力轴承（4），气浮轴承组件（3）具有与球头（21）配合的球面部（31）、与圆柱面配合的柱面部（32）以及与飞盘（22）的下端面配合的法兰部（33），气浮轴承组件（3）的球面部（31）、柱面部（32）和法兰部（33）均设有出气孔，推力轴承（4）支承于飞盘（22）的上端面，推力轴承（4）包括推力轴承座（41）和滚动体（42）。

Description

一种气浮主轴和车床 技术领域
本发明用于车削领域，特别是涉及一种气浮主轴和车床。
背景技术
因为气浮主轴的误差均化现象，以及低摩擦、低损耗，使得气浮主轴成为实现超精密加工最好的载体之一。车床加工的过程中，因为加工进给量较大的原因，往往对工件轴的轴向刚度与承载力提出极高的要求。但是因为大多数超精密气浮主轴承载力不足，极其影响加工效率与加工范围且很难作为车床工件轴使用。
发明内容
本发明的目的在于至少解决现有技术中存在的技术问题之一，提供一种气浮主轴和车床，兼顾气浮轴承的径向精度与推力轴承结构的轴向刚度，在保证超精密加工的同时，也适用于需要大承载力与大倾覆力矩的场合。
本发明解决其技术问题所采用的技术方案是：
第一方面，一种气浮主轴，包括：
机体组件；
轴芯组件，通过轴承组件支承于所述机体组件，所述轴芯组件的下端设有球头，所述轴芯组件于所述球头的上方设有飞盘，所述飞盘与所述球头通过沿轴向延伸的圆柱面相衔接；
其中，所述轴承组件包括气浮轴承组件和推力轴承，所述气浮轴 承组件具有与所述球头配合的球面部、与所述圆柱面配合的柱面部以及与所述飞盘的下端面配合的法兰部，所述气浮轴承组件的球面部、柱面部和法兰部均设有出气孔，所述推力轴承支承于所述飞盘的上端面，所述推力轴承包括推力轴承座和滚动体。
结合第一方面，在第一方面的某些实现方式中，所述气浮轴承组件的球面部设有轴孔，所述轴芯组件的球头设有输出轴，所述输出轴由所述轴孔穿出。
结合第一方面和上述实现方式，在第一方面的某些实现方式中，所述输出轴设有螺纹接口。
结合第一方面和上述实现方式，在第一方面的某些实现方式中，所述气浮轴承组件嵌装于所述机体组件的内孔，所述机体组件设有与所述出气孔相通的气路。
结合第一方面和上述实现方式，在第一方面的某些实现方式中，所述推力轴承座设有滚珠滚道，所述推力轴承还包括保持架，所述保持架与所述推力轴承座连接，并将所述滚动体限定于所述推力轴承座和飞盘之间。
结合第一方面和上述实现方式，在第一方面的某些实现方式中，还包括位于所述推力轴承上方的电机组件，所述电机组件包括定子和转子，所述定子设置于所述机体组件，所述转子设置于所述轴芯组件。
结合第一方面和上述实现方式，在第一方面的某些实现方式中，所述机体组件上端设有顶盖组件，所述顶盖组件封闭所述机体组件的顶端内孔。
结合第一方面和上述实现方式，在第一方面的某些实现方式中，所述机体组件设有冷却介质流道。
第二方面，一种车床，包括第一方面中任一实现方式所述的气浮主轴。
上述技术方案中的一个技术方案至少具有如下优点或有益效果之一：气浮主轴的承载力、承载刚度与加工精度得到显著提升,其中，气浮轴承组件的球面部、柱面部以及法兰部形成三支撑式轴承组结构，三支撑式轴承组结构与气浮-推力轴承复合式运动结构一方面保证了主轴承载力、承载刚度的大幅度提升，另一方面也让车床工件轴获得极高的加工精度，达到以车带磨的加工效果。兼顾气浮轴承的径向精度与推力轴承结构的轴向刚度，在保证超精密加工的同时，也适用于需要大承载力与大倾覆力矩的场合。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是本发明气浮主轴的一个实施例结构示意图。
具体实施方式
本部分将详细描述本发明的具体实施例，本发明之较佳实施例在附图中示出，附图的作用在于用图形补充说明书文字部分的描述，使人能够直观地、形象地理解本发明的每个技术特征和整体技术方案， 但其不能理解为对本发明保护范围的限制。
本发明中，如果有描述到方向(上、下、左、右、前及后)时，其仅是为了便于描述本发明的技术方案，而不是指示或暗示所指的技术特征必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
本发明中，除非另有明确的限定，“设置”“安装”“连接”等词语应做广义理解，例如，可以是直接相连，也可以通过中间媒介间接相连；可以是固定连接，也可以是可拆卸连接，还可以是一体成型；可以是机械连接，也可以是电连接或能够互相通讯；可以是两个元件内部的连通或两个元件的相互作用关系。所属技术领域技术人员可以结合技术方案的具体内容合理确定上述词语在本发明中的具体含义。
其中，图1给出了本发明实施例的参考方向坐标系，以下结合图1所示的方向，对本发明的实施例进行说明。
参见图1，本发明的实施例提供了一种气浮主轴，包括机体组件1和轴芯组件2，轴芯组件2通过轴承组件支承于机体组件1，轴芯组件2的下端设有球头21，球头21在轴芯组件的下端形成圆顶，轴芯组件2于球头21的上方设有飞盘22，飞盘22与球头21通过沿轴向延伸的圆柱面相衔接。气浮主轴在前端输出动力，气浮主轴可根据需要在前端连接车刀等刀具，以实现车削等加工。
其中，参见图1，轴承组件包括气浮轴承组件3和推力轴承4，气浮轴承组件3具有与球头21配合的球面部31、与圆柱面配合的柱面部32以及与飞盘22的下端面配合的法兰部33，气浮轴承组件3 的球面部31、柱面部32和法兰部33均设有出气孔，球面部31和柱面部32过渡连接，形成截面呈U形的内腔，气浮轴承组件3的球面部31、柱面部32以及法兰部33形成三支撑式轴承组结构，能够为轴心组件提供径向和轴向的支撑力。推力轴承4支承于飞盘22的上端面，推力轴承4包括推力轴承座41和滚动体42。
通过外部供气，高压纯净气体进入气浮轴承组件3,U形的气浮轴承组件3上下两支撑面将轴芯组件2悬浮起来并顶住推力轴承4，推力轴承4上有滚动体42，与气浮轴承组件3共同支撑起轴芯组件2，在电机的驱动下，轴芯组件2即可自由运转。
本发明的气浮主轴主要应用于车床加工中的工件轴，具有高精度(车削表面粗糙度10nm以下，径向回转精度12.5nm以下)，大承载力(轴向承载力5000N以上)，高刚度(轴向刚度800N.m以上)，高倾覆力矩等特点，该主轴以其高回转精度确保车削加工可达到磨削精度(圆度0.2um以下)。与传统车床加工相比，具有超高加工精度的特点，可达到“以车代磨”的加工效果，与其他超精密气浮主轴相比具有更高承载力与刚度，可极大扩大气浮主轴的加工范围。
参见图1，气浮轴承组件3的球面部31设有轴孔，轴芯组件2的球头21设有输出轴23，输出轴23与轴芯组件2同轴，输出轴23由轴孔穿出，输出轴23能够与车刀连接。例如在一些实施例中，输出轴23设有螺纹接口，连接车床加工工件，即可完成车削加工。
外部气源可以直接通入气浮轴承组件3，也可以通过机体组件1的气路通入气浮轴承组件3，例如在图1所示的实施例中，气浮轴承 组件3嵌装于机体组件1的内孔，机体组件1设有与出气孔相通的气路11。高压纯净气源通过气路11分别进入气浮轴承组件3的球面部31、柱面部32以及法兰部33中，气流通过多孔质轴承在内部支撑起轴芯组件2。
参见图1，推力轴承座41设有滚珠滚道，推力轴承4还包括保持架，保持架与推力轴承座41连接，并将滚动体42均匀的限定于推力轴承座41和飞盘22之间。滚动体42在保持架槽内滚动，滚动体42支撑起轴芯组件飞盘22另一面，保证轴芯自由运转。根据需要，还可以在飞盘22的上表面设置与滚动体42配合的滚珠滚道。本发明的实施例通过推力轴承座41、滚动体42和飞盘22形成具有滚道结构的推力轴承4，结构更加精简，降低主轴的轴向尺寸。
该发明特采用多孔质轴承作为气浮主轴的支撑载体保证更高承载力，同时气浮轴承的U型底部与法兰位置可提供更高的径向单向承载力，另一面采用滚珠滑道结构保证双面承载，双面保险使得该主轴轴向承载力可达5000N以上，径向刚度可达800N.m以上，完全可以满足正常车床工件轴的加工需求。
在一些实施例中，参见图1，气浮主轴还包括位于推力轴承4上方的电机组件，电机组件与轴芯组件2直联，即电机组件包括定子51和转子52，定子51设置于机体组件1，转子52设置于轴芯组件2。
进一步的，参见图1，所机体组件1上端设有顶盖组件6，顶盖组件6封闭机体组件1的顶端内孔，避免杂质进入机体组件1内部，引起电机、推力轴承4和气浮轴承组件3故障。
在一些实施例中，机体组件1设有冷却介质流道，冷却水通过顶盖组件6依次进入机体组件1与推力轴承4循环冷却整只主轴。
为使该发明在实现超精密加工的同时也能兼顾高刚度、高承载与高倾覆力矩，本发明创新性的使用了轴向三支撑轴承组结构，气浮-滚道复合式运动结构，确保该主轴在满足纳米级别超精密加工的同时，亦使整个轴系拥有极高的承载力与刚度。
1.本发明创新性的使用了三支撑式轴承组结构，使得主轴在使用气浮轴承状态下仍能保证极大的刚度与承载力，同时也确保了主轴在长时间、高负荷下运转的稳定性。
2.本发明使用全新的气浮-滚道复合式运动结构，在保证了主轴的整个轴系高刚度，高倾覆力矩的基础上，仍能满足纳米级别的回转精度与纳米级别的车削粗糙度要求，使超精密气浮主轴作为车床工件轴成为了可能。
本发明的实施例还提供一种车床，包括以上任一实施例的气浮主轴。
专为超精密工件轴设计的轴向三支撑轴承组，保证加工过程当中轴向刚度可达到800N.m以上，轴向承载力可达5000N以上；特有的气浮-滚道结合运动结构，保证主轴加工状态下10nm以下的车削表面粗糙度，12.5nm以下的径向回转精度以及极强的抗倾覆力矩，该主轴以其高回转精度确保车削加工可达到磨削精度(圆度0.2um以下)。
在本说明书的描述中，参考术语“示例”、“实施例”或“一些实施例”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。
当然，本发明创造并不局限于上述实施方式，熟悉本领域的技术人员在不违背本发明精神的前提下还可作出等同变形或替换，这些等同的变形或替换均包含在本申请权利要求所限定的范围内。

Claims (9)

  1. 一种气浮主轴，其特征在于，包括：
    机体组件；
    轴芯组件，通过轴承组件支承于所述机体组件，所述轴芯组件的下端设有球头，所述轴芯组件于所述球头的上方设有飞盘，所述飞盘与所述球头通过沿轴向延伸的圆柱面相衔接；
    其中，所述轴承组件包括气浮轴承组件和推力轴承，所述气浮轴承组件具有与所述球头配合的球面部、与所述圆柱面配合的柱面部以及与所述飞盘的下端面配合的法兰部，所述气浮轴承组件的球面部、柱面部和法兰部均设有出气孔，所述推力轴承支承于所述飞盘的上端面，所述推力轴承包括推力轴承座和滚动体。
  2. 根据权利要求1所述的气浮主轴，其特征在于，所述气浮轴承组件的球面部设有轴孔，所述轴芯组件的球头设有输出轴，所述输出轴由所述轴孔穿出。
  3. 根据权利要求2所述的气浮主轴，其特征在于，所述输出轴设有螺纹接口。
  4. 根据权利要求1所述的气浮主轴，其特征在于，所述气浮轴承组件嵌装于所述机体组件的内孔，所述机体组件设有与所述出气孔相通的气路。
  5. 根据权利要求1所述的气浮主轴，其特征在于，所述推力轴承座设有滚珠滚道，所述推力轴承还包括保持架，所述保持架与所述推力轴承座连接，并将所述滚动体限定于所述推力轴承座和飞盘之 间。
  6. 根据权利要求1所述的气浮主轴，其特征在于，还包括位于所述推力轴承上方的电机组件，所述电机组件包括定子和转子，所述定子设置于所述机体组件，所述转子设置于所述轴芯组件。
  7. 根据权利要求6所述的气浮主轴，其特征在于，所述机体组件上端设有顶盖组件，所述顶盖组件封闭所述机体组件的顶端内孔。
  8. 根据权利要求1所述的气浮主轴，其特征在于，所述机体组件设有冷却介质流道。
  9. 一种车床，其特征在于，包括权利要求1～8中任一项所述的气浮主轴。
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