A method for manufacturing a dynamic and static pressure spindle eccentric sleeve

Abstract

The present invention relates to a method for machining and manufacturing an eccentric sleeve for a dynamic and static pressure spindle, and relates to the technical field of mechanical manufacturing dynamic and static pressure bearings. The method comprises: grinding the outer front static pressure structure cylindrical surface, the outer rear static pressure structure cylindrical surface, the rear outer cylindrical surface of the eccentric sleeve, and the outer static pressure structure transition outer cylindrical surface of the eccentric sleeve; grinding the front outer cylindrical surface of the eccentric sleeve to improve roundness, surface roughness, and form and position tolerance accuracy; grinding the front dynamic and static pressure bearing mounting hole or the rear dynamic and static pressure bearing mounting hole of the eccentric sleeve; installing the front dynamic and static pressure bearing and the rear dynamic and static pressure bearing; installing the eccentric sleeve on the rear outer cylindrical surface of the eccentric sleeve, and grinding the front bearing hole and the rear bearing hole using an internal grinding method. The method has a simple process and is easy to adjust. It can meet the mechanical processing requirements before and after the front and rear bearings are installed in the bearing hole of the eccentric sleeve, ensuring the working accuracy of this type of dynamic and static pressure spindle.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical manufacturing of dynamic and static pressure bearings, in particular to a method for processing and manufacturing a dynamic and static pressure main shaft eccentric sleeve. Background Art

[0002] Bearings are one of the key basic components that affect the machining accuracy of machine tools. Improving their rotational accuracy, vibration resistance, and dynamic rigidity is receiving increasing attention. A considerable number of high-end CNC machine tools currently use hydrostatic sliding bearings or dynamic sliding bearings in their spindles. Hydrostatic sliding bearings have the advantages of long service life and low starting power, and are widely used. During the process of starting a hydrostatic sliding bearing from a standstill to stable operation, the journal and bearing are in a non-liquid lubricated contact state of boundary film lubrication, which causes frictional contact wear. The hydrostatic sliding bearing (abbreviated as hydrostatic bearing) is a type of sliding bearing developed on the basis of hydrostatic sliding bearings and hydrostatic sliding bearings. It combines the characteristics of hydrostatic sliding bearings and hydrostatic sliding bearings, and has superior performance.

[0003] During the rolling process of the strip, the strip shape quality is guaranteed by a reasonable roll shape. Common roll shapes include positive convexity, negative convexity, and continuously variable convexity. In order to process various roll shapes, the grinding wheel frame of the roll grinder generally needs to be equipped with a grinding wheel frame U-axis structure. CN102513889A discloses a grinding wheel frame U-axis structure. The AC servo motor realizes the up and down movement of one end of the rocker through the ball screw pair, and the other end of the rocker is fixedly connected to the eccentric sleeve, thereby driving the eccentric sleeve to swing at a small angle, and finally making the main shaft in the eccentric sleeve realize a slight feed and retreat, so as to achieve the purpose of grinding the concave (convex) of the roller.

[0004] Attachment Figure 1 and Figure 2The figure shows a dynamic and static pressure spindle structure used in a roll grinder to realize concave (convex) grinding function. The front end of the eccentric sleeve 1 is installed with a front dynamic and static pressure bearing 2, and the rear end is installed with a rear dynamic and static pressure bearing 3. Corresponding to the position of the front dynamic and static pressure bearing 2, the front outer cylindrical surface 103 of the eccentric sleeve 1 is concentric with the bearing hole of the front dynamic and static pressure bearing 2, both of which are O2; corresponding to the position of the rear dynamic and static pressure bearing 3, the rear outer cylindrical surface 104 of the eccentric sleeve 1 is not concentric with the bearing hole of the rear dynamic and static pressure bearing 3, the former is O1, and the latter is O2; the eccentric sleeve 1 is not concentric with the bearing hole of the rear dynamic and static pressure bearing 3. The outer front and rear static pressure cylindrical surfaces 101, 102 at both ends of the middle section of the sleeve 1 are equipped with static pressure oil chambers. Together with the grinding wheel frame housing, they form an outer static pressure structure, supporting the eccentric sleeve 1 within the grinding wheel frame housing through static pressure support. The side view projection centers of the outer front and rear static pressure cylindrical surfaces 101, 102, 104, and 112 are all centered at O1. There is an eccentricity e between centers O1 and O2. The front and rear static pressure bearings 2, 3 are installed in the front and rear static pressure bearing mounting holes 106, 105 of the eccentric sleeve 1 with an interference fit, forming an inner static pressure structure with the spindle.

[0005] Since the outer cylindrical surfaces (101, 102, 103, 104, 112) of the eccentric sleeve 1 are sometimes concentric with or eccentric with the bearing mounting holes (105, 106) for mounting the front and rear dynamic and static pressure bearings, the eccentric sleeve 1 is a special-shaped part. In order to improve the working accuracy of the spindle system using this eccentric sleeve, it is necessary to provide a set of processing and manufacturing methods based on the specific structure of the eccentric sleeve 1 to improve the processing accuracy of each surface of the eccentric sleeve 1. Summary of the Invention

[0006] In order to solve at least one technical problem in the background technology, the present invention provides a method for processing and manufacturing an eccentric sleeve of a dynamic and static pressure spindle. The process is simple and the adjustment is convenient. It can meet the mechanical processing before and after the installation of the front and rear bearings in the bearing hole of the eccentric sleeve, thereby ensuring the working accuracy of such a dynamic and static pressure spindle.

[0007] To achieve the above-mentioned object, the present invention provides a method for manufacturing a dynamic and static pressure spindle eccentric sleeve, comprising the following steps:

[0008] Step S1: grinding the outer front static pressure structure cylindrical surface of the eccentric sleeve, the outer rear static pressure structure cylindrical surface, the rear outer cylindrical surface of the eccentric sleeve, and the outer transition outer cylindrical surface of the outer static pressure structure;

[0009] Step S2: grinding the front outer cylindrical surface of the eccentric sleeve to improve its own roundness, surface roughness, and the shape and position tolerance accuracy with the outer front static pressure structure cylindrical surface, the outer rear static pressure structure cylindrical surface, the eccentric sleeve rear outer cylindrical surface, and the outer static pressure structure transition outer cylindrical surface;

[0010] Step S3: Remove the left and right blind heads at both ends of the eccentric sleeve, install the eccentric sleeve on the rear outer cylindrical surface of the eccentric sleeve, and select the front outer cylindrical surface of the eccentric sleeve or the rear outer cylindrical surface of the eccentric sleeve closer to the head frame according to the distance relationship between the front outer cylindrical surface of the eccentric sleeve and the rear outer cylindrical surface of the eccentric sleeve and the head frame to install a driving device to drive the eccentric sleeve to rotate, and use the internal grinding method to grind the front dynamic and static pressure bearing mounting hole or the rear dynamic and static pressure bearing mounting hole of the eccentric sleeve;

[0011] Step S4: installing the front dynamic and static pressure bearing and the rear dynamic and static pressure bearing in the front dynamic and static pressure bearing mounting hole and the rear dynamic and static pressure bearing mounting hole of the eccentric sleeve respectively by interference fit;

[0012] Step S5: Install the eccentric sleeve on the rear outer cylindrical surface of the eccentric sleeve. According to the distance relationship between the front outer cylindrical surface of the eccentric sleeve and the rear outer cylindrical surface of the eccentric sleeve and the head frame, select the front outer cylindrical surface of the eccentric sleeve or the rear outer cylindrical surface of the eccentric sleeve close to the head frame to install the driving device, drive the eccentric sleeve to rotate, and use the internal grinding method to grind the front bearing hole and the rear bearing hole of the eccentric sleeve where the front dynamic and static pressure bearings and the rear dynamic and static pressure bearings are installed.

[0013] Furthermore, in step S1, the second center hole of the left blind head of the left blind head and the second center hole of the right blind head of the right blind head are used as references and held on a grinding machine. According to the connection relationship between the left blind head and the right blind head and the head frame, the left blind head driving cylinder of the left blind head or the right blind head driving cylinder of the right blind head is selected, and a driving device is installed to drive the eccentric sleeve to rotate to grind the outer front static pressure structure cylindrical surface of the eccentric sleeve, the outer rear static pressure structure cylindrical surface, the rear outer cylindrical surface of the eccentric sleeve, and the outer static pressure structure transition outer cylindrical surface.

[0014] Furthermore, in step S2, the left first center hole of the left blind head and the right first center hole of the right blind head are used as references and supported on a grinding machine. According to the connection relationship between the left blind head, the right blind head and the head frame, the left blind head driving cylinder of the left blind head or the right blind head driving cylinder of the right blind head is selected, and a driving device is installed to drive the eccentric sleeve to rotate to grind the front outer cylindrical surface of the eccentric sleeve of the eccentric sleeve, thereby improving its own roundness, surface roughness and the shape and position tolerance accuracy of the outer front static pressure structure cylindrical surface, the outer rear static pressure structure cylindrical surface, the eccentric sleeve rear outer cylindrical surface and the outer static pressure structure transition outer cylindrical surface.

[0015] Furthermore, in step S3, the method for installing the eccentric sleeve on the rear outer cylindrical surface of the eccentric sleeve is as follows: the eccentric sleeve is sleeved on the rear outer cylindrical surface of the eccentric sleeve so that the eccentric direction of the eccentric sleeve is opposite to the eccentricity of the rear outer cylindrical surface of the eccentric sleeve, so that the eccentric sleeve inner cylindrical surface of the eccentric sleeve is concentric with the rear outer cylindrical surface of the eccentric sleeve and the eccentric sleeve outer cylindrical surface is concentric with the front outer cylindrical surface of the eccentric sleeve, and then the eccentric sleeve is fixed in the eccentric sleeve fixing threaded hole on the rear shoulder surface of the eccentric sleeve of the eccentric sleeve, and then the eccentric sleeve outer cylindrical surface and the front outer cylindrical surface of the eccentric sleeve of the eccentric sleeve are mounted on two V-shaped grinding fixtures, the thickness of the pad on the V-shaped grinding fixture is adjusted so that the center of the eccentric sleeve outer cylindrical surface and the front outer cylindrical surface of the eccentric sleeve are at the same height as the head and tail frames, and the eccentric sleeve is clamped with a V-shaped clamping block above the two V-shaped grinding fixtures.

[0016] Furthermore, in step S5, the method for installing the eccentric sleeve on the rear outer cylindrical surface of the eccentric sleeve is as follows: the eccentric direction of the eccentric sleeve is opposite to the eccentricity of the rear outer cylindrical surface of the eccentric sleeve, the eccentric sleeve inner cylindrical surface of the eccentric sleeve is concentric with the rear outer cylindrical surface of the eccentric sleeve, and the eccentric sleeve outer cylindrical surface is concentric with the front outer cylindrical surface of the eccentric sleeve, and then the eccentric sleeve is fixed in the eccentric sleeve fixing threaded hole on the rear shoulder surface of the eccentric sleeve of the eccentric sleeve, and then the eccentric sleeve outer cylindrical surface and the front outer cylindrical surface of the eccentric sleeve of the eccentric sleeve are mounted on two V-shaped grinding fixtures, the thickness of the pad on the V-shaped grinding fixture is adjusted so that the center of the eccentric sleeve outer cylindrical surface and the front outer cylindrical surface of the eccentric sleeve are at the same height as the head and tail frames, and the eccentric sleeve is clamped with a V-shaped clamping block above the two V-shaped grinding fixtures.

[0017] Furthermore, step S1 is replaced by the following steps:

[0018] Step S1′, take the left blind head second center hole of the left blind head and the right blind head second center hole of the right blind head as reference, hold them on the grinding machine; take the left blind head measuring cylinder and the right blind head measuring cylinder as reference, adjust the upper busbar and side busbar of the outer front static pressure structure cylindrical surface, the outer rear static pressure structure cylindrical surface, the eccentric sleeve rear outer cylindrical surface, and the outer static pressure structure transition outer cylindrical surface of the eccentric sleeve, so that the processing allowance is uniform; according to the connection relationship between the left blind head, the right blind head and the head frame, select the left blind head driving cylinder of the left blind head or the right blind head driving cylinder of the right blind head, install the driving device, drive the eccentric sleeve to rotate, and grind the outer front static pressure structure cylindrical surface, the outer rear static pressure structure cylindrical surface, the eccentric sleeve rear outer cylindrical surface, and the outer static pressure structure transition outer cylindrical surface of the eccentric sleeve.

[0019] Furthermore, step S2 is replaced by the following steps:

[0020] Step S2′, take the left blind head first center hole of the left blind head and the right blind head first center hole of the right blind head as the reference, hold them on the grinding machine; take the left blind head measuring cylinder and the right blind head measuring cylinder as the reference, adjust the upper busbar and the side busbar of the front outer cylindrical surface of the eccentric sleeve of the eccentric sleeve to make the machining allowance uniform; according to the connection relationship between the left blind head, the right blind head and the head frame, select the left blind head driving cylinder of the left blind head or the right blind head driving cylinder of the right blind head, install the driving device, drive the eccentric sleeve to rotate, grind the front outer cylindrical surface of the eccentric sleeve of the eccentric sleeve, improve its own roundness, surface roughness and the shape and position tolerance accuracy with the outer front static pressure structure cylindrical surface, the outer rear static pressure structure cylindrical surface, the eccentric sleeve rear outer cylindrical surface, and the outer static pressure structure transition outer cylindrical surface.

[0021] Furthermore, after step S5, the following steps are performed:

[0022] Step S6, fixing the eccentric sleeve completed in step S5 on the turning mechanism so that the front bearing hole of the front dynamic and static pressure bearing and the rear bearing hole of the rear dynamic and static pressure bearing are horizontal, and measuring the roundness and surface roughness of the front bearing hole and the rear bearing hole, as well as the form and position errors between the front bearing hole and the rear bearing hole;

[0023] Step S7: When the roundness and surface roughness of the front bearing hole and the rear bearing hole, as well as the form and position errors between the front bearing hole and the rear bearing hole, do not meet the design requirements, the eccentric sleeve fixed to the flip mechanism is flipped 90 degrees by using the flip mechanism so that the front bearing hole of the front dynamic and static pressure bearing and the rear bearing hole of the rear dynamic and static pressure bearing are in a vertical direction, and the front bearing hole of the front dynamic and static pressure bearing and the rear bearing hole of the rear dynamic and static pressure bearing are ground by using a grinding rod;

[0024] Step S8, return to step S6, measure the roundness, surface roughness, and shape and position errors of the front bearing hole of the front dynamic and static pressure bearing and the rear bearing hole of the rear dynamic and static pressure bearing; if the design requirements are still not met, implement step S7 again until the design requirements are met.

[0025] Furthermore, before step S3 or step S5, the following steps are added:

[0026] In step S', a plurality of dynamic balancing devices are installed on the transition outer cylindrical surface of the outer layer of the static pressure structure of the intermediate shaft section of the eccentric sleeve. The diameter of the inner cylindrical surface of the dynamic balancing device is adapted to the shaft diameter of the transition outer cylindrical surface of the outer layer of the static pressure structure. The dynamic balancing device is then fixed to the transition outer cylindrical surface of the outer layer of the static pressure structure using set screws in the threaded holes of the dynamic balancing device. The center of mass eccentricity of the second component of the dynamic balancing device relative to the first component of the dynamic balancing device is opposite to the direction of the eccentric distance e of the eccentric sleeve, and the dynamic balancing amount of the dynamic balancing device is adapted to the dynamic unbalance amount of the eccentric sleeve.

[0027] The beneficial effects of the present invention are:

[0028] The present invention provides a method for processing and manufacturing the eccentric sleeve of the dynamic and static pressure main shaft. A blind head is installed in each of the front and rear bearing holes. The blind head is used as a reference to support the machine tool, and the outer static pressure structure of the eccentric sleeve is ground to improve the outer static pressure supporting performance; an eccentric sleeve is set at the non-concentric position between the dynamic and static pressure bearing mounting hole of the eccentric sleeve and the corresponding outer cylindrical surface, and the eccentricity of the inner and outer cylindrical surfaces of the eccentric sleeve is used to make the outer cylindrical surface of the eccentric sleeve concentric with the dynamic and static pressure mounting hole, and then the eccentric sleeve is placed on two V-shaped grinding fixtures one after the other, and the height of the pad in the V-shaped notch of the V-shaped grinding fixture is adjusted to achieve the center of the front and rear dynamic and static pressure bearing mounting holes of the eccentric sleeve is aligned with the center of the V-shaped notch of the V-shaped grinding fixture. The centers of the headstock and tailstock of the machine tool are at the same height, and then the internal grinding method can be used to grind the front and rear dynamic and static pressure bearing mounting holes of the eccentric sleeve, thereby improving the accuracy of the front and rear dynamic and static pressure bearing mounting holes, and effectively ensuring the connection rigidity of the front and rear dynamic and static pressure bearings and the eccentric sleeve; similarly, after the installation connection between the front and rear dynamic and static pressure bearings and the eccentric sleeve is completed, the centering function of the eccentric sleeve is used to make the bearing hole centers of the front and rear dynamic and static pressure bearings of the eccentric sleeve and the center of the headstock and tailstock of the machine tool equal, and the bearing holes of the front and rear dynamic and static pressure bearings are ground by the internal grinding method to improve the supporting performance of the inner layer dynamic and static pressure support of the dynamic and static pressure spindle. In addition, the flipping mechanism can be used to fix the eccentric sleeve on which the front and rear dynamic and static pressure bearings are installed. When the eccentric sleeve is horizontal, the shape and position errors of the bearing holes of the front and rear dynamic and static pressure bearings can be measured; when the eccentric sleeve is in the plumb direction, the grinding rod can be used to grind the bearing holes of the front and rear dynamic and static pressure bearings to reduce the shape and position errors of the bearing holes of the front and rear dynamic and static pressure bearings, thereby further improving the working accuracy of the dynamic and static pressure spindle system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of the eccentric sleeve of the dynamic and static pressure main shaft and the dynamic and static pressure bearings before and after installation thereof;

[0030] Figure 2 This is a left side view of the eccentric sleeve of the dynamic and static pressure main shaft involved in the present invention;

[0031] Figure 3 This is a right side view of the eccentric sleeve of the dynamic and static pressure main shaft involved in the present invention;

[0032] Figure 4 This is a structural diagram of the dynamic and static pressure spindle eccentric sleeves of the present invention when the left and right blind heads are installed for processing;

[0033] Figure 5 yes Figure 4 Left view of;

[0034] Figure 6 yes Figure 4 Right view of;

[0035] Figure 7 It is a structural diagram of a dynamic and static pressure main shaft eccentric sleeve provided with an eccentric sleeve and a dynamic balancing device according to the present invention;

[0036] Figure 8 It is a side view showing the eccentric sleeve part involved in the present invention and its fixed connection structure with the side of the eccentric sleeve;

[0037] Figure 9 is a side view showing the structure of the dynamic balancing device according to the present invention;

[0038] In the figure: 1-eccentric sleeve; 2-front dynamic and static pressure bearing; 3-rear dynamic and static pressure bearing; 4-eccentric sleeve; 5-dynamic balancing device; 6-left blind head; 7-right blind head; 101-outer front static pressure structure cylindrical surface; 102-outer rear static pressure structure cylindrical surface; 103-front outer cylindrical surface of eccentric sleeve; 104-rear outer cylindrical surface of eccentric sleeve; 105-rear dynamic and static pressure bearing mounting hole; 106-front dynamic and static pressure bearing mounting hole; 107-rear end face of eccentric sleeve; 108-rear shoulder face of eccentric sleeve; 109-fixing threaded hole of eccentric sleeve; 110-fixing threaded hole of left blind head; 111-fixing threaded hole of right blind head; 112 -Transition outer cylindrical surface of the outer static pressure structure; 401-outer cylindrical surface of the eccentric sleeve; 402-inner cylindrical surface of the eccentric sleeve; 403-fixing hole of the eccentric sleeve; 501-inner cylindrical surface of the dynamic balancing device; 502-fixing threaded hole of the dynamic balancing device; 503-first component of the dynamic balancing device; 504-second component of the dynamic balancing device; 601-first center hole of the left bulkhead; 602-second center hole of the left bulkhead; 603-driving cylindrical surface of the left bulkhead; 604-measuring cylindrical surface of the left bulkhead; 701-first center hole of the right bulkhead; 702-second center hole of the right bulkhead; 703-driving cylindrical surface of the right bulkhead; 704-measuring cylindrical surface of the right bulkhead. DETAILED DESCRIPTION

[0039] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0041] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0042] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0043] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0044] The purpose of the present invention is to provide a method for processing and manufacturing an eccentric sleeve of a dynamic and static pressure main shaft. Based on the processing route of typical surfaces and the positioning reference selection principle of mechanical manufacturing process regulations, the mechanical processing of the dynamic and static pressure bearing mounting holes is realized by setting up special tooling; after the front and rear dynamic and static pressure bearings are installed, the front and rear dynamic and static pressure bearing holes are still ground by special tooling; a flipping mechanism is set to fix the eccentric sleeve and keep the front and rear dynamic and static pressure bearing holes in a horizontal position, and the shape and position errors of the front and rear dynamic and static pressure bearing holes are measured; if the shape and position errors do not meet the design requirements, the flipping mechanism is used to flip the eccentric sleeve so that the front and rear dynamic and static pressure bearing holes are in a plumb position, and the grinding rod is used to grind the front and rear dynamic and static pressure bearing holes to reduce the shape and position errors of the front and rear dynamic and static pressure bearing holes; by designing a complete set of technical process routes, the technical difficulties in the processing and manufacturing of the eccentric sleeve of the dynamic and static pressure main shaft are solved.

[0045] like Figure 1 、 Figure 2 and Figure 3 As shown, the centers of the front bearing hole of the front dynamic and static pressure bearing 2 and the rear bearing hole of the rear dynamic and static pressure bearing 3, and the center of the front outer cylindrical surface 103 of the eccentric sleeve corresponding to the front dynamic and static pressure bearing 2 are all O2; the centers of the rear outer cylindrical surface 104 of the eccentric sleeve corresponding to the position of the rear dynamic and static pressure bearing 3, the outer front static pressure structure cylindrical surface 101, the outer rear static pressure structure cylindrical surface 102, and the outer layer static pressure structure transition outer cylindrical surface 112 located between the outer front static pressure structure cylindrical surface 101 and the outer rear static pressure structure cylindrical surface 102 are all O1, and the eccentricity between the center O1 and the center O2 is e; the outer front static pressure structure cylindrical surface 101 and the outer rear static pressure structure cylindrical surface 102 of the eccentric sleeve 1 are both provided with a static pressure oil chamber, which forms an outer layer static pressure structure with the grinding wheel frame body shell, and the eccentric sleeve 1 is supported in the grinding wheel frame body shell in the form of static pressure support. The front and rear dynamic and static pressure bearings 2 and 3 are installed in the eccentric sleeve 1's front and rear dynamic and static pressure bearing mounting holes 106 and 105, respectively, with an interference fit, forming an inner static pressure structure with the spindle. The eccentric sleeve 1 is connected to a U-axis structure, which incorporates an adjustment mechanism to swing the eccentric sleeve 1 slightly, allowing the spindle within the eccentric sleeve 1 to make slight advances and retreats, thus achieving the desired concave and convex grinding function in the roll grinder.

[0046] In order to improve the working accuracy of this type of dynamic and static pressure spindle, the manufacturing strategy is as follows: Figure 2 、 Figure 3 and Figure 4As shown, a right bulkhead fixing threaded hole 111 is provided on the front end surface of the eccentric sleeve 1, and a left bulkhead fixing threaded hole 110 is provided on the rear end surface 107 of the eccentric sleeve. The right bulkhead fixing threaded hole 111 and the left bulkhead fixing threaded hole 110 are used to fix the right bulkhead 7 and the left bulkhead 6 respectively, and then the outer front static pressure structure cylindrical surface 101, the outer rear static pressure structure cylindrical surface 102, the eccentric sleeve rear cylindrical surface 104, the outer static pressure structure transition outer cylindrical surface 112 and the eccentric sleeve front outer cylindrical surface 103 of the eccentric sleeve 1 are ground and processed respectively, so as to improve the processing accuracy of each outer cylindrical surface of the eccentric sleeve 1 and achieve the purpose of improving the outer static pressure support performance; as shown Figure 2 、 Figure 7 and Figure 8 As shown, an eccentric sleeve fixing threaded hole 109 is provided on the eccentric sleeve rear shoulder surface 108 of the eccentric sleeve 1, and an eccentric sleeve 4 is sleeved at the position of the rear outer cylindrical surface 104 of the eccentric sleeve, so that the eccentric sleeve inner cylindrical surface 402 of the eccentric sleeve 4 is concentric with the rear outer cylindrical surface 104 of the eccentric sleeve, and the eccentric sleeve outer cylindrical surface 401 is concentric with the rear dynamic and static pressure bearing mounting hole 105 of the eccentric sleeve 1, and then the eccentric sleeve 4 is fixed to the eccentric sleeve fixing threaded hole 109 of the eccentric sleeve rear shoulder surface 108 of the eccentric sleeve 1 by connecting screws in the eccentric sleeve fixing hole 403, and then the eccentric sleeve outer cylindrical surface 401 of the eccentric sleeve 4 and the eccentric sleeve front outer cylindrical surface 103 are mounted on two V-shaped grinding fixtures, and the thickness of the pad on the V-shaped grinding fixture is adjusted so that the eccentric sleeve outer cylindrical surface 401 and the eccentric sleeve front outer cylindrical surface are concentric. The center of the cylinder 103 is at the same height as the headstock and tailstock of the machine tool, and the front dynamic and static pressure bearing mounting hole 106 and the rear dynamic and static pressure bearing mounting hole 105 of the eccentric sleeve 1 are ground to improve the connection rigidity of the front dynamic and static pressure bearing 2 and the rear dynamic and static pressure bearing 3 with the eccentric sleeve 1, or the front dynamic and static pressure bearing mounting hole 106 and the rear dynamic and static pressure bearing mounting hole 105 of the eccentric sleeve 1 are ground to complete the front bearing hole and the rear bearing hole for installing the front dynamic and static pressure bearing 2 and the rear dynamic and static pressure bearing 3, thereby improving the supporting performance of the inner layer dynamic and static pressure support of the dynamic and static pressure spindle; what's more, the front bearing hole and the rear bearing of the eccentric sleeve 1 with the front dynamic and static pressure bearing 2 and the rear dynamic and static pressure bearing 3 are measured and ground to further reduce the bearing hole shape and position errors of the front and rear dynamic and static pressure bearings, thereby improving the working accuracy of the dynamic and static pressure spindle system.

[0047] The eccentricity between the right first center hole 701 and the right second center hole 702 of the right bulkhead 7 is not only equal to the eccentricity between the left first center hole 601 and the left second center hole 602 of the left bulkhead 6, both are e, but the phases of the two eccentricities are also the same.

[0048] Based on the machining routes and positioning reference selection principles of typical surfaces in mechanical manufacturing process regulations, the present invention provides a method for manufacturing a multi-oil wedge tapered dynamic and static pressure bearing, comprising the following steps:

[0049] Step S1: Figure 4 、 Figure 5 and Figure 6 As shown, with the left bulkhead second center hole 602 of the left bulkhead 6 and the right bulkhead second center hole 702 of the right bulkhead 7 as references, they are held on a grinding machine. According to the connection relationship between the left bulkhead 6 and the right bulkhead 7 and the head frame, the left bulkhead driving cylindrical surface 603 of the left bulkhead 6 or the right bulkhead driving cylindrical surface 703 of the right bulkhead 7 is selected, and a driving device is installed to drive the eccentric sleeve 1 to rotate, and the outer front static pressure structure cylindrical surface 101, the outer rear static pressure structure cylindrical surface 102, the eccentric sleeve rear outer cylindrical surface 104, and the outer static pressure structure transition outer cylindrical surface 112 of the eccentric sleeve 1 are ground to improve its own roundness, surface roughness, and the shape and position tolerance accuracy between the surfaces;

[0050] Step S2: Figure 4 As shown, with the left bulkhead first center hole 601 of the left bulkhead 6 and the right bulkhead first center hole 701 of the right bulkhead 7 as references, the bulkhead is held on a grinding machine, and according to the connection relationship between the left bulkhead 6 and the right bulkhead 7 and the head frame, the left bulkhead driving cylindrical surface 603 of the left bulkhead 6 or the right bulkhead driving cylindrical surface 703 of the right bulkhead 7 is selected, and a driving device is installed to drive the eccentric sleeve 1 to rotate, and the eccentric sleeve front outer cylindrical surface 103 of the eccentric sleeve 1 is ground to improve its own roundness, surface roughness and the shape and position tolerance accuracy with the outer front static pressure structure cylindrical surface 101, the outer rear static pressure structure cylindrical surface 102, the eccentric sleeve rear outer cylindrical surface 104, and the outer static pressure structure transition outer cylindrical surface 112; step S1 and step S2 can be implemented interchangeably;

[0051] Step S3: Remove the left blind head 6 and the right blind head 7 at both ends of the eccentric sleeve 1, and set the eccentric sleeve 4 on the rear outer cylindrical surface 104 of the eccentric sleeve, so that the eccentric direction of the eccentric sleeve 4 is opposite to the eccentricity of the rear outer cylindrical surface 104 of the eccentric sleeve, so that the eccentric sleeve inner cylindrical surface 402 of the eccentric sleeve 4 is concentric with the rear outer cylindrical surface 104 of the eccentric sleeve, and the eccentric sleeve outer cylindrical surface 401 is concentric with the front outer cylindrical surface 103 of the eccentric sleeve, and then fix the eccentric sleeve 4 in the eccentric sleeve fixing threaded hole 109 of the eccentric sleeve rear shoulder surface 108 of the eccentric sleeve 1, and then mount the eccentric sleeve outer cylindrical surface 401 of the eccentric sleeve 4 and the eccentric sleeve front outer cylindrical surface 103 on On the two V-shaped grinding fixtures, adjust the thickness of the pads on the V-shaped grinding fixtures so that the centers of the eccentric sleeve outer cylindrical surface 401 and the front outer cylindrical surface 103 of the eccentric sleeve are at the same height as the head and tail frames, and clamp the eccentric sleeve 1 with V-shaped clamping blocks on the top of the two V-shaped grinding fixtures; according to the distance relationship between the front outer cylindrical surface 103 of the eccentric sleeve and the rear outer cylindrical surface 104 of the eccentric sleeve and the head frame, select the front outer cylindrical surface 103 of the eccentric sleeve or the rear outer cylindrical surface 104 of the eccentric sleeve close to the head frame to install the driving device, drive the eccentric sleeve 1 to rotate, and use the internal grinding method to grind the front dynamic and static pressure bearing mounting hole 106 or the rear dynamic and static pressure bearing mounting hole 105 of the eccentric sleeve 1;

[0052] Step S4: installing the front dynamic and static pressure bearing 2 and the rear dynamic and static pressure bearing 3 in the front dynamic and static pressure bearing mounting hole 106 and the rear dynamic and static pressure bearing mounting hole 105 of the eccentric sleeve 1 respectively by interference fit;

[0053] Step S5: The eccentric sleeve 4 is mounted on the rear outer cylindrical surface 104 of the eccentric sleeve, so that the eccentric direction of the eccentric sleeve 4 is opposite to the eccentricity of the rear outer cylindrical surface 104 of the eccentric sleeve, so that the eccentric sleeve inner cylindrical surface 402 of the eccentric sleeve 4 is concentric with the rear outer cylindrical surface 104 of the eccentric sleeve, and the eccentric sleeve outer cylindrical surface 401 is concentric with the front outer cylindrical surface 103 of the eccentric sleeve, and then the eccentric sleeve 4 is fixed in the eccentric sleeve fixing threaded hole 109 of the eccentric sleeve rear shoulder surface 108 of the eccentric sleeve 1, and then the eccentric sleeve outer cylindrical surface 401 of the eccentric sleeve 4 and the eccentric sleeve front outer cylindrical surface 103 are mounted on two V-shaped grinding fixtures, and the V-shaped The thickness of the pad on the grinding fixture makes the centers of the eccentric sleeve outer cylindrical surface 401 and the front outer cylindrical surface 103 of the eccentric sleeve at the same height as the head and tail frames, and the eccentric sleeve 1 is clamped by a V-shaped clamping block above the two V-shaped grinding fixtures; according to the distance relationship between the front outer cylindrical surface 103 of the eccentric sleeve and the rear outer cylindrical surface 104 of the eccentric sleeve and the head frame, the front outer cylindrical surface 103 of the eccentric sleeve or the rear outer cylindrical surface 104 of the eccentric sleeve close to the head frame is selected to install the driving device, which drives the eccentric sleeve 1 to rotate, and the front bearing hole and the rear bearing hole of the eccentric sleeve 1 where the front dynamic and static pressure bearing 2 and the rear dynamic and static pressure bearing 3 are installed are ground by the internal grinding method.

[0054] In order to reduce the machining allowances before grinding of the outer front static pressure structure cylindrical surface 101, the outer rear static pressure structure cylindrical surface 102, the eccentric sleeve rear outer cylindrical surface 104, the outer static pressure structure transition outer cylindrical surface 112, and the eccentric sleeve front outer cylindrical surface 103 in steps S1 and S2, steps S1 and S2 can be replaced by the following steps:

[0055] Step S1′, take the left bulkhead second center hole 602 of the left bulkhead 6 and the right bulkhead second center hole 702 of the right bulkhead 7 as the reference, hold them on the grinding machine; take the left bulkhead measuring cylindrical surface 604 and the right bulkhead measuring cylindrical surface 704 as the reference, adjust the upper generatrix and side generatrix of the outer front static pressure structure cylindrical surface 101, the outer rear static pressure structure cylindrical surface 102, the eccentric sleeve rear outer cylindrical surface 104, and the outer static pressure structure transition outer cylindrical surface 112 of the eccentric sleeve 1, so that the machining allowance is uniform; according to the left bulkhead The connection relationship between the head 6, the right blind head 7 and the head frame, select the left blind head driving cylinder 603 of the left blind head 6 or the right blind head driving cylinder 703 of the right blind head 7, install the driving device, drive the eccentric sleeve 1 to rotate, grind the outer front static pressure structure cylindrical surface 101, the outer rear static pressure structure cylindrical surface 102, the eccentric sleeve rear outer cylindrical surface 104, and the outer static pressure structure transition outer cylindrical surface 112 of the eccentric sleeve 1, and improve its own roundness, surface roughness and the shape and position tolerance accuracy between each surface.

[0056] Step S2′, with the left bulkhead first center hole 601 of the left bulkhead 6 and the right bulkhead first center hole 701 of the right bulkhead 7 as the reference, hold them on the grinding machine; with the left bulkhead measuring cylindrical surface 604 and the right bulkhead measuring cylindrical surface 704 as the reference, adjust the upper generatrix and the side generatrix of the front outer cylindrical surface 103 of the eccentric sleeve 1 so that the machining allowance is uniform; according to the connection relationship between the left bulkhead 6 and the right bulkhead 7 and the head frame, select the left bulkhead 6 of the left bulkhead The blind head drives the cylindrical surface 603 or the right blind head drives the cylindrical surface 703 of the right blind head 7, installs a driving device, drives the eccentric sleeve 1 to rotate, grinds the front outer cylindrical surface 103 of the eccentric sleeve 1, and improves its own roundness, surface roughness and the shape and position tolerance accuracy with the outer front static pressure structure cylindrical surface 101, the outer rear static pressure structure cylindrical surface 102, the eccentric sleeve rear outer cylindrical surface 104, and the outer static pressure structure transition outer cylindrical surface 112.

[0057] In order to further improve the working accuracy of the dynamic and static pressure spindle system, the following steps are performed after step S5:

[0058] Step S6: Fix the eccentric sleeve 1 completed in step S5 on the turning mechanism so that the front bearing hole of the front dynamic and static pressure bearing 2 and the rear bearing hole of the rear dynamic and static pressure bearing 3 are horizontal, and measure the roundness and surface roughness of the front bearing hole and the rear bearing hole, as well as the form and position errors between the front bearing hole and the rear bearing hole;

[0059] Step S7: When the roundness and surface roughness of the front bearing hole and the rear bearing hole, as well as the form and position errors between the front bearing hole and the rear bearing hole, do not meet the design requirements, the eccentric sleeve 1 fixed to the flip mechanism is flipped 90 degrees by using the flip mechanism so that the front bearing hole of the front dynamic and static pressure bearing 2 and the rear bearing hole of the rear dynamic and static pressure bearing 3 are in a vertical direction, and the front bearing hole of the front dynamic and static pressure bearing 2 and the rear bearing hole of the rear dynamic and static pressure bearing 3 are ground by using a grinding rod;

[0060] Step S8, return to step S6, measure the roundness, surface roughness, and shape and position errors of the front bearing hole of the front hydrostatic bearing 2 and the rear bearing hole of the rear hydrostatic bearing 3; if the design requirements are still not met, implement step S7 again until the design requirements are met.

[0061] In order to reduce the influence of dynamic imbalance on the machining accuracy during the rotation of the eccentric sleeve 1, the following steps are added before implementing step S3 or step S5:

[0062] In step S′, a plurality of dynamic balancing devices 5 are installed on the outer cylindrical surface 112 of the transition layer of the outer static pressure structure of the intermediate shaft section of the eccentric sleeve 1. The aperture size of the inner cylindrical surface 501 of the dynamic balancing device 5 is adapted to the shaft diameter of the outer static pressure structure transition layer 112. The dynamic balancing device 5 is then fixed to the outer cylindrical surface 112 of the transition layer of the outer static pressure structure using set screws in the dynamic balancing device fixing threaded holes 502. The center of mass eccentricity of the second dynamic balancing device component 504 of the dynamic balancing device 5 relative to the first dynamic balancing device component 503 is opposite to the direction of the eccentric distance e of the eccentric sleeve 1, and the dynamic balancing amount of the dynamic balancing device component is adapted to the dynamic unbalance amount of the eccentric sleeve 1. By providing the dynamic balancing device 5, the dynamic balancing error of the eccentric sleeve 1 during rotation is reduced, and the machining accuracy of the eccentric sleeve of the dynamic and static pressure main shaft is improved.

[0063] The present invention provides a method for processing and manufacturing the eccentric sleeve of the dynamic and static pressure main shaft. A blind head is installed in each of the front and rear bearing holes. The blind head is used as a reference to support the machine tool, and the outer static pressure structure of the eccentric sleeve is ground to improve the outer static pressure supporting performance; an eccentric sleeve is set at the non-concentric position between the dynamic and static pressure bearing mounting hole of the eccentric sleeve and the corresponding outer cylindrical surface, and the eccentricity of the inner and outer cylindrical surfaces of the eccentric sleeve is used to make the outer cylindrical surface of the eccentric sleeve concentric with the dynamic and static pressure mounting hole, and then the eccentric sleeve is placed on two V-shaped grinding fixtures one after the other, and the height of the pad in the V-shaped notch of the V-shaped grinding fixture is adjusted to achieve the center of the front and rear dynamic and static pressure bearing mounting holes of the eccentric sleeve is aligned with the center of the V-shaped notch of the V-shaped grinding fixture. The centers of the headstock and tailstock of the machine tool are at the same height, and then the internal grinding method can be used to grind the front and rear dynamic and static pressure bearing mounting holes of the eccentric sleeve, thereby improving the accuracy of the front and rear dynamic and static pressure bearing mounting holes, and effectively ensuring the connection rigidity of the front and rear dynamic and static pressure bearings and the eccentric sleeve; similarly, after the installation connection between the front and rear dynamic and static pressure bearings and the eccentric sleeve is completed, the centering function of the eccentric sleeve is used to make the bearing hole centers of the front and rear dynamic and static pressure bearings of the eccentric sleeve and the center of the headstock and tailstock of the machine tool equal, and the bearing holes of the front and rear dynamic and static pressure bearings are ground by the internal grinding method to improve the supporting performance of the inner layer dynamic and static pressure support of the dynamic and static pressure spindle. In addition, the flipping mechanism can be used to fix the eccentric sleeve on which the front and rear dynamic and static pressure bearings are installed. When the eccentric sleeve is horizontal, the shape and position errors of the bearing holes of the front and rear dynamic and static pressure bearings can be measured; when the eccentric sleeve is in the plumb direction, the grinding rod can be used to grind the bearing holes of the front and rear dynamic and static pressure bearings to reduce the shape and position errors of the bearing holes of the front and rear dynamic and static pressure bearings, thereby further improving the working accuracy of the dynamic and static pressure spindle system.

[0064] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for manufacturing a dynamic and static pressure spindle eccentric sleeve, characterized in that: The steps include: Step S1: grinding the outer front static pressure structure cylindrical surface (101), the outer rear static pressure structure cylindrical surface (102), the eccentric sleeve rear outer cylindrical surface (104), and the outer static pressure structure transition outer cylindrical surface (112) of the eccentric sleeve (1); Step S2: grinding the front outer cylindrical surface (103) of the eccentric sleeve (1) to improve its own roundness, surface roughness, and the shape and position tolerance accuracy with the outer front static pressure structure cylindrical surface (101), the outer rear static pressure structure cylindrical surface (102), the eccentric sleeve rear outer cylindrical surface (104), and the outer static pressure structure transition outer cylindrical surface (112); Step S3: Remove the left blind head (6) and the right blind head (7) at both ends of the eccentric sleeve (1), install the eccentric sleeve (4) on the rear outer cylindrical surface (104) of the eccentric sleeve, and select the front outer cylindrical surface (103) or the rear outer cylindrical surface (104) of the eccentric sleeve closer to the head frame according to the distance between the front outer cylindrical surface (103) and the rear outer cylindrical surface (104) of the eccentric sleeve and the head frame to install the driving device, drive the eccentric sleeve (1) to rotate, and use the internal grinding method to grind the front dynamic and static pressure bearing mounting hole (106) or the rear dynamic and static pressure bearing mounting hole (105) of the eccentric sleeve (1); Step S4: installing the front dynamic and static pressure bearing (2) and the rear dynamic and static pressure bearing (3) in the front dynamic and static pressure bearing mounting hole (106) and the rear dynamic and static pressure bearing mounting hole (105) of the eccentric sleeve (1) respectively by interference fit; Step S5: Install the eccentric sleeve (4) on the rear outer cylindrical surface (104) of the eccentric sleeve. According to the distance between the front outer cylindrical surface (103) of the eccentric sleeve and the rear outer cylindrical surface (104) of the eccentric sleeve and the head frame, select the front outer cylindrical surface (103) of the eccentric sleeve or the rear outer cylindrical surface (104) of the eccentric sleeve that is closer to the head frame to install the driving device, drive the eccentric sleeve (1) to rotate, and use the internal grinding method to grind the front bearing hole and the rear bearing hole of the eccentric sleeve (1) in which the front dynamic and static pressure bearing (2) and the rear dynamic and static pressure bearing (3) are installed.

2. The method for manufacturing a dynamic and static pressure spindle eccentric sleeve according to claim 1, characterized in that: In step S1, the left blind head second center hole (602) of the left blind head (6) and the right blind head second center hole (702) of the right blind head (7) are used as references and supported on a grinding machine. According to the connection relationship between the left blind head (6) and the right blind head (7) and the head frame, the left blind head driving cylinder (603) of the left blind head (6) or the right blind head driving cylinder (703) of the right blind head (7) is selected, and a driving device is installed to drive the eccentric sleeve (1) to rotate, so as to grind the outer front static pressure structure cylindrical surface (101), the outer rear static pressure structure cylindrical surface (102), the eccentric sleeve rear outer cylindrical surface (104), and the outer static pressure structure transition outer cylindrical surface (112) of the eccentric sleeve (1).

3. The method for manufacturing a dynamic and static pressure spindle eccentric sleeve according to claim 2, characterized in that: In step S2, the left first center hole (601) of the left blind head (6) and the right first center hole (701) of the right blind head (7) are used as references and are held on a grinding machine. According to the connection relationship between the left blind head (6) and the right blind head (7) and the head frame, the left blind head driving cylinder (603) of the left blind head (6) or the right blind head driving cylinder (703) of the right blind head (7) is selected, and a driving device is installed to drive the eccentric sleeve (1) to rotate to grind the front outer cylindrical surface (103) of the eccentric sleeve (1) to improve its own roundness, surface roughness and the shape and position tolerance accuracy with the outer front static pressure structure cylindrical surface (101), the outer rear static pressure structure cylindrical surface (102), the eccentric sleeve rear outer cylindrical surface (104) and the outer static pressure structure transition outer cylindrical surface (112).

4. A method for manufacturing a dynamic and static pressure spindle eccentric sleeve according to claim 3, characterized in that: In step S3, the method for installing the eccentric sleeve (4) on the rear outer cylindrical surface (104) of the eccentric sleeve is as follows: the eccentric sleeve (4) is sleeved on the rear outer cylindrical surface (104) of the eccentric sleeve so that the eccentric direction of the eccentric sleeve (4) is opposite to the eccentricity of the rear outer cylindrical surface (104) of the eccentric sleeve, so that the eccentric sleeve inner cylindrical surface (402) of the eccentric sleeve (4) is concentric with the rear outer cylindrical surface (104) of the eccentric sleeve and the eccentric sleeve outer cylindrical surface (401) is concentric with the front outer cylindrical surface (103) of the eccentric sleeve, and then the eccentric sleeve (4) is sleeved on the rear outer cylindrical surface (104) of the eccentric sleeve. The sleeve (4) is fixed in the eccentric sleeve fixing threaded hole (109) of the eccentric sleeve rear shoulder surface (108) of the eccentric sleeve (1), and then the eccentric sleeve outer cylindrical surface (401) and the eccentric sleeve front outer cylindrical surface (103) of the eccentric sleeve (4) are mounted on two V-shaped grinding fixtures, and the thickness of the pads on the V-shaped grinding fixtures is adjusted so that the centers of the eccentric sleeve outer cylindrical surface (401) and the eccentric sleeve front outer cylindrical surface (103) are at the same height as the head and tail frames, and the eccentric sleeve (1) is clamped on the two V-shaped grinding fixtures with V-shaped clamping blocks.

5. The method for manufacturing a dynamic and static pressure spindle eccentric sleeve according to claim 4, characterized in that: In step S5, the method for installing the eccentric sleeve (4) on the rear outer cylindrical surface (104) of the eccentric sleeve is as follows: the eccentric direction of the eccentric sleeve (4) is opposite to the eccentricity of the rear outer cylindrical surface (104) of the eccentric sleeve, the eccentric sleeve inner cylindrical surface (402) of the eccentric sleeve (4) is concentric with the rear outer cylindrical surface (104) of the eccentric sleeve, and the eccentric sleeve outer cylindrical surface (401) is concentric with the front outer cylindrical surface (103) of the eccentric sleeve, and then the eccentric sleeve (4) is fixed on the eccentric sleeve ( 1), and then the eccentric sleeve outer cylindrical surface (401) and the eccentric sleeve front outer cylindrical surface (103) of the eccentric sleeve are mounted on two V-shaped grinding fixtures. The thickness of the pads on the V-shaped grinding fixtures is adjusted so that the centers of the eccentric sleeve outer cylindrical surface (401) and the eccentric sleeve front outer cylindrical surface (103) are at the same height as the head and tail frames. The eccentric sleeve (1) is clamped on the two V-shaped grinding fixtures with V-shaped clamping blocks.

6. The method for manufacturing a dynamic and static pressure spindle eccentric sleeve according to claim 5, characterized in that: Replace step S1 with the following steps: Step S1′, using the left blind head second center hole (602) of the left blind head (6) and the right blind head second center hole (702) of the right blind head (7) as references, holding them on a grinding machine; using the left blind head measuring cylindrical surface (604) and the right blind head measuring cylindrical surface (704) as references, adjusting the upper busbar and the side busbar of the outer front static pressure structure cylindrical surface (101), the outer rear static pressure structure cylindrical surface (102), the eccentric sleeve rear outer cylindrical surface (104), and the outer static pressure structure transition outer cylindrical surface (112) of the eccentric sleeve (1), The processing allowance is made uniform; according to the connection relationship between the left bulkhead (6), the right bulkhead (7) and the head frame, the left bulkhead driving cylinder (603) of the left bulkhead (6) or the right bulkhead driving cylinder (703) of the right bulkhead (7) is selected, and a driving device is installed to drive the eccentric sleeve (1) to rotate, and the outer front static pressure structure cylindrical surface (101), the outer rear static pressure structure cylindrical surface (102), the eccentric sleeve rear outer cylindrical surface (104), and the outer static pressure structure transition outer cylindrical surface (112) of the eccentric sleeve (1) are ground.

7. A method for manufacturing a dynamic and static pressure spindle eccentric sleeve according to claim 5 or 6, characterized in that: Replace step S2 with the following steps: Step S2′, using the left bulkhead first center hole (601) of the left bulkhead (6) and the right bulkhead first center hole (701) of the right bulkhead (7) as references, holding them on a grinding machine; using the left bulkhead measuring cylinder (604) and the right bulkhead measuring cylinder (704) as references, adjusting the upper generatrix and the side generatrix of the front outer cylindrical surface (103) of the eccentric sleeve (1) so that the machining allowance is uniform; according to the connection relationship between the left bulkhead (6) and the right bulkhead (7) and the head frame, selecting the left bulkhead (6) The left blind head drives the cylindrical surface (603) or the right blind head of the right blind head (7) drives the cylindrical surface (703), and a driving device is installed to drive the eccentric sleeve (1) to rotate, and the front outer cylindrical surface (103) of the eccentric sleeve of the eccentric sleeve (1) is ground to improve its own roundness and surface roughness as well as the shape and position tolerance accuracy with the outer front static pressure structure cylindrical surface (101), the outer rear static pressure structure cylindrical surface (102), the eccentric sleeve rear outer cylindrical surface (104), and the outer static pressure structure transition outer cylindrical surface (112).

8. The method for manufacturing a dynamic and static pressure spindle eccentric sleeve according to claim 7, characterized in that: After step S5, the following steps are performed: Step S6, fixing the eccentric sleeve (1) completed in step S5 on the turning mechanism so that the front bearing hole of the front dynamic and static pressure bearing (2) and the rear bearing hole of the rear dynamic and static pressure bearing (3) are horizontal, and measuring the roundness and surface roughness of the front bearing hole and the rear bearing hole, as well as the shape and position errors between the front bearing hole and the rear bearing hole; Step S7, when the roundness and surface roughness of the front bearing hole and the rear bearing hole themselves and the form and position errors between the front bearing hole and the rear bearing hole do not meet the design requirements, the eccentric sleeve (1) fixed on the flip mechanism is flipped 90 degrees by using a flip mechanism, so that the front bearing hole of the front dynamic and static pressure bearing (2) and the rear bearing hole of the rear dynamic and static pressure bearing (3) are in a vertical direction, and the front bearing hole of the front dynamic and static pressure bearing (2) and the rear bearing hole of the rear dynamic and static pressure bearing (3) are ground by using a grinding rod; Step S8, return to step S6, measure the roundness, surface roughness, and shape and position errors of the front bearing hole of the front dynamic and static pressure bearing (2) and the rear bearing hole of the rear dynamic and static pressure bearing (3); if the design requirements are still not met, perform step S7 again until the design requirements are met.

9. The method for manufacturing a dynamic and static pressure spindle eccentric sleeve according to claim 7, characterized in that: Before step S3 or step S5, add the following steps: Step S′, a plurality of dynamic balancing devices (5) are sleeved on the outer cylindrical surface (112) of the transition of the outer static pressure structure of the intermediate shaft section of the eccentric sleeve (1), the aperture size of the dynamic balancing device inner cylindrical surface (501) of the dynamic balancing device (5) is adapted to the shaft diameter of the transition of the outer static pressure structure of the outer cylindrical surface (112), and then the dynamic balancing device (5) is fixed to the outer cylindrical surface (112) of the transition of the outer static pressure structure by means of a set screw in the dynamic balancing device fixing threaded hole (502); the center of mass eccentricity of the second dynamic balancing device component (504) of the dynamic balancing device (5) relative to the first dynamic balancing device component (503) is opposite to the direction of the eccentric distance e of the eccentric sleeve (1), and the dynamic balancing amount thereof is adapted to the dynamic unbalance amount of the eccentric sleeve (1).

Images