Device and method for processing and detecting multiple oil wedges on the forming surface of sliding bearings

Abstract

The present invention relates to a multi-oil wedge processing and error detection device and method for the forming surface of a sliding bearing. The sliding bearing to be processed is placed in a multi-oil wedge processing fixture for the forming surface of the sliding bearing that adopts the principle of a crank rocker mechanism. The reciprocating swing of the fixture realizes the movement of the multi-oil wedge grinding processing of the forming surface of the sliding bearing. A rolling bearing group and a bushing are provided to adjust the arc center of the multi-oil wedge dynamic pressure cavity profile of the forming surface so that the center of the dynamic pressure cavity profile of the sliding bearing coincides with the center of the fixture body to meet the grinding requirements. The center of the pulley is adjusted, and the processing fixture is driven by the head frame motor. The required dynamic pressure cavity profile is obtained by grinding with the internal grinding tool under the swing of the processed sliding bearing. The error detection device detects the oil film gap between the multi-oil wedge dynamic pressure cavity profile of the forming surface of the sliding bearing and the main shaft neck. If the intersection depth of the dynamic pressure cavity profile and the static pressure cavity is inconsistent, it is corrected by scraping. The present invention has a simple structure and an adjustment method, which can meet the consistency requirements of the multi-oil wedge grinding processing of the entire forming surface.

Description

Technical Field

[0001] The present invention relates to a sliding bearing, in particular to a device and method for processing and detecting a forming surface of a sliding bearing. Background Art

[0002] For oil-lubricated sliding bearings, liquid friction is ideal. Integrally molded multi-oil wedge radial bearings are available with either an Archimedean spiral or an eccentric arc profile. They can be single-sided or double-sided. Alternatively, they can utilize elastic deformation to force radial contraction at certain bearing angles and expansion at others, forming a dynamic oil wedge.

[0003] Hydrostatic bearings utilize a hydraulic system to forcibly inject pressurized lubricating oil into the gap between the shaft and bearing. They are a type of sliding bearing that supports loads using liquid static pressure, and their advantage is a pure liquid friction state. Hydrodynamic and hydrostatic bearings are a type of sliding bearing developed based on hydrodynamic and hydrostatic bearings. Based on hydrodynamic bearings, hydrostatic chambers of appropriate size and number are located in appropriate locations, equipped with a suitable hydrostatic oil supply system. When the spindle is stationary or the speed falls below a critical value, the pressure differential between the hydrostatic chambers created by the pressurized oil provided by the hydrostatic oil supply system lifts the spindle and allows it to withstand a certain external load, placing the bearing in a fully liquid friction state. This prevents dry or semi-dry friction during spindle startup, shutdown, or low-speed operation, reducing starting torque and bearing wear. Figure 1 This is a schematic diagram of a multi-oil wedge profile structure of a dynamic and static pressure bearing forming surface, which consists of an axial oil sealing edge 1, a dynamic pressure cavity profile 2, and a static pressure cavity 3; the dynamic pressure cavity profile 2 is in the form of an arc, and the center O2 of the arc can be concentric with the center O3 of the axial oil sealing edge 1 arc, or it can be non-concentric with the center O3 of the axial oil sealing edge 1 arc. In order to give full play to the Figure 1 The performance of the dynamic and static pressure bearing shown in the figure requires the central angle β corresponding to the axial oil sealing edge 1, the central angle α corresponding to the dynamic pressure cavity profile 2, and the depth h1-h0 ( Figure 1 In the middle, h1 is the oil film gap between the dynamic pressure cavity profile 2 and the static pressure cavity 3 at the junction of the dynamic pressure cavity profile 2 and the main shaft neck 5, and h0 is the oil film gap between the axial oil sealing edge 1 and the main shaft neck 5). The overall molding surface formed by multiple oil wedges remains consistent.

[0004] In the above research context, it is necessary to develop a multi-oil wedge machining fixture and error detection device for the forming surface of a sliding bearing, and propose corresponding usage methods in response to the precision machining and parameter consistency requirements of the oil cavity of the dynamic pressure cavity of the integral forming surface multi-oil wedge dynamic and static pressure bearing. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for processing and detecting errors of multiple oil wedges on the forming surface of a sliding bearing. The device can solve the problem of processing the dynamic pressure cavity surface of the sliding bearing. By detecting the depth of the dynamic pressure cavity surface and correcting the errors of the dynamic pressure cavity surface by scraping, the consistency of the multiple oil wedge structure of the forming surface of the sliding bearing is ensured.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A device for processing and detecting errors of a multi-oil wedge on a sliding bearing forming surface, comprising a multi-oil wedge processing fixture for processing a sliding bearing forming surface and a multi-oil wedge dynamic pressure cavity profile error detection device for the sliding bearing forming surface, wherein the multi-oil wedge processing fixture for processing a sliding bearing forming surface forms a crank rocker mechanism through a pulley, a crank, a connecting rod and a clamping body, and the sliding bearing being processed swings back and forth in the clamping body of the processing fixture to realize the grinding processing movement of the multi-oil wedge dynamic pressure cavity profile of the sliding bearing forming surface, the flange end face on the clamping body is used to fix the sliding bearing being processed, and an eccentric structure bushing is installed in the clamping body to realize the adjustment of the eccentric arc center of the dynamic pressure cavity profile of the multi-oil wedge structure of the sliding bearing forming surface, a rolling bearing group is arranged between the bushing and the sliding bearing being processed, and a rolling bearing group is arranged between the bushing and the sliding bearing being processed. The dynamic bearing group and the bushing make the arc center of the multi-oil wedge dynamic pressure cavity profile of the forming surface coincide with the center of the clamp body, forming the rotation center of the crank rocker mechanism; by adjusting the center of the pulley, the processed sliding bearing is swung under the drive of the head frame motor and the required oil cavity profile is obtained by grinding with the internal cylindrical grinding tool; the sliding bearing forming surface multi-oil wedge dynamic pressure cavity profile error detection device includes a base, a fixing frame, a measuring meter, and two ball screws. The bottom surface of the base contacts the bearing end face of the sliding bearing, and the spherical structures of the two ball screws rest on the circumferential oil sealing edge of the sliding bearing. The measuring meter is installed on the fixing frame for detecting the oil film gap between the multi-oil wedge dynamic pressure cavity profile of the sliding bearing forming surface and the main shaft neck, as well as the depth of the junction between the dynamic pressure cavity profile and the static pressure cavity.

[0008] Furthermore, the sliding bearing forming surface multi-oil wedge processing fixture includes a pulley, a crank, a connecting rod, a clamping body, a main shaft sleeve, a bushing, and a flange. The crank is provided with a waist-shaped hole A, and the pulley is fixedly installed through the waist-shaped hole A, and the crank and the connecting rod are pin-connected; a positioning step is provided on one side of the main shaft sleeve, and the positioning step of the main shaft sleeve and the center of the inner hole of the clamping body are positioned by a screw pin, and then the connecting rod forms a pin connection between the rocker and the connecting rod in the crank rocker mechanism; the bushing is fixedly installed in the inner hole of the clamping body; the bushing is installed with the processed sliding bearing through the rolling bearing group, and the right end of the clamping body is fixedly installed with a flange, and the outer end face of the flange is provided with threaded holes with the same number and circumferentially evenly distributed as the multi-oil wedge dynamic pressure cavity profiles on the sliding bearing forming surface; the sliding bearing is fixedly connected to the threaded hole of the flange through a dividing screw in the dividing hole on the sliding bearing with the same number and circumferentially evenly distributed as the multi-oil wedge dynamic pressure cavity profiles on the sliding bearing forming surface.

[0009] Furthermore, when the bushing is inserted into the clamping body and the flange fixes the sliding bearing, the center of the eccentric arc of the sliding bearing coincides with the rotation center of the outer cylindrical surface of the bushing.

[0010] Furthermore, the rolling bearing group adopts a structure in which rolling balls are installed in a ball frame, or adopts a structure in which rolling needles are installed in a ball frame.

[0011] Furthermore, the base in the sliding bearing forming surface multi-oil wedge dynamic pressure cavity profile error detection device is disc-shaped, with an arc hole on one side and two waist-shaped holes B on the other side; a U-shaped groove B is provided in the middle of the fixing frame along the up and down directions; the fixing frame is fixedly connected to the base by screws passing through the waist-shaped hole B of the base; a U-shaped groove A is also provided on the upper side of the fixing frame, and a dovetail groove is provided on the outer side of the U-shaped groove A; a measuring needle is provided at the lower end of the measuring meter, and a dovetail ridge is provided on the upper side for sliding connection with the dovetail groove of the fixing frame; a measuring dial is provided on the other side above the measuring meter for displaying the reading of the measuring needle, and the U-shaped groove A of the fixing frame is locked by a locking knob to slide the dovetail ridge and the dovetail groove, and a ball screw is provided at one end and a thread is provided at the other end; the two ball screws are fixed to the base through threads, and an adjustment knob is provided on the top of the fixing frame to adjust the size of the opening of the U-shaped groove B.

[0012] Furthermore, when installed and used, the measuring needle of the measuring meter passes through the arc-shaped hole of the base, so that the measuring needle rests on the bearing inner hole of the sliding bearing.

[0013] A method for machining a multi-oil wedge dynamic pressure cavity profile on a sliding bearing forming surface, using a multi-oil wedge machining and error detection device for the sliding bearing forming surface, and the steps are as follows:

[0014] Step 1: Obtain the swing angle α of the multi-oil wedge machining fixture of the sliding bearing forming surface: According to the multi-oil wedge structural characteristics of the forming surface of the bearing inner hole of the sliding bearing, the central angles β and α corresponding to the axial oil sealing edge and the dynamic pressure cavity surface are obtained respectively;

[0015] Step 2: Use a V-shaped frame to support the outer cylindrical surface of the clamp on the machine tool workbench so that the center of the outer cylindrical surface of the bushing coincides with the center line of the top of the headstock;

[0016] Step 3: Adjust the connection position between the crank and the pulley in the crank-rocker mechanism and change the crank's rotation radius so that the swing angle of the crank-rocker mechanism rocker of the sliding bearing forming surface multi-oil wedge machining fixture is α;

[0017] Step 4: Adjust the position of the fixed connection center O1 of the crank and the pulley so that when the crank rocker mechanism of the sliding bearing forming surface multi-oil wedge processing fixture is at the two extreme positions of the rocker, it is also the intersection of the sliding bearing forming surface multi-oil wedge dynamic pressure cavity surface and the static pressure cavity, and the intersection of the axial oil sealing edge and the multi-oil wedge dynamic pressure cavity surface, which meet the two processing extreme positions of the internal grinding wheel for internal grinding;

[0018] Step 5: Start the headstock motor, so that the headstock spindle rotates and drives the pulley, so that the oil wedge processing fixture of the sliding bearing forming surface swings, and the inner circle grinding tool extends into the bearing inner hole of the sliding bearing for grinding;

[0019] Step 6: Loosen the indexing screw, rotate the sliding bearing, and grind the next dynamic pressure cavity surface of the forming surface with multiple oil wedges; repeat several times until the dynamic pressure cavity surface of the forming surface with multiple oil wedges is processed;

[0020] Step 7: Place the spherical structures of the two ball screws in the sliding bearing forming surface multi-oil wedge dynamic pressure cavity profile error detection device against the circumferential oil sealing edge of the sliding bearing, and the bottom surface of the base contacts the bearing end face of the sliding bearing. Install a measuring meter on the fixed frame so that the measuring needle of the measuring meter passes through the arc hole of the base and rests on the oil cavity profile of the sliding bearing. Adjust the contact force between the measuring needle and the oil cavity profile of the sliding bearing by adjusting the knob; push the base to rotate along the edge of the bearing inner hole of the sliding bearing, and obtain the oil film gap between the forming surface multi-oil wedge dynamic pressure cavity profile and the main shaft neck and the depth h1-h0 of the junction of the dynamic pressure cavity profile and the static pressure cavity by the measuring needle, where h1 is the oil film gap between the dynamic pressure cavity profile and the main shaft neck at the junction, and h0 is the oil film gap between the axial oil sealing edge and the main shaft neck;

[0021] Step 8: Scrape the surface of the forming surface to make the depth h1-h0 of the oil wedge dynamic pressure cavity obtained by the measuring needle consistent.

[0022] The beneficial effects of the present invention are:

[0023] The present invention adopts the crank rocker mechanism principle to install a multi-oil wedge processing fixture for the sliding bearing forming surface on the head frame, so that the processed sliding bearing swings back and forth in the clamping base of the processing fixture, thereby realizing the movement of grinding the multi-oil wedge dynamic pressure cavity profile of the sliding bearing forming surface; the angle size of the dynamic pressure cavity profile in the multi-oil wedge structure of the sliding bearing forming surface is adjusted by adjusting the crank length; the bushing is designed to be an eccentric structure, thereby realizing the adjustment of the eccentric arc center of the dynamic pressure cavity profile of the multi-oil wedge structure of the sliding bearing forming surface; a bearing group is arranged between the bushing and the processed sliding bearing, and a threaded hole for indexing is opened on the flange to realize the indexing required for grinding the dynamic pressure cavity profile of the multi-oil wedge structure of the sliding bearing forming surface; an error detection device is used to detect the depth of the intersection of the multi-oil wedge dynamic pressure cavity profile and the static pressure cavity of the sliding bearing forming surface, and a scraping method is used to correct the error according to the difference between the depth values, thereby ensuring the consistency of the oil film depth at the starting inlet of the dynamic pressure oil wedge of the multi-oil wedge structure of the dynamic bearing forming surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the multi-oil wedge surface structure of the dynamic and static pressure bearing forming surface;

[0025] Figure 2 It is a three-dimensional schematic diagram of the multi-oil wedge structure on the forming surface of the dynamic and static pressure bearing;

[0026] Figure 3 This is a front view of the multi-oil wedge machining fixture for the sliding bearing forming surface of the present invention;

[0027] Figure 4 A cross-sectional view of a multi-oil wedge machining fixture for a sliding bearing forming surface according to the present invention;

[0028] Figure 5 The three-dimensional structure diagram of the sliding bearing forming surface multi-oil wedge dynamic pressure cavity surface error detection device of the present invention Figure 1 ;

[0029] Figure 6 The three-dimensional structure diagram of the sliding bearing forming surface multi-oil wedge dynamic pressure cavity surface error detection device of the present invention Figure 2 ;

[0030] In the figure: 1-axial oil sealing edge; 2-dynamic pressure chamber profile; 3-static pressure chamber; 4-bearing end face; 5-main shaft journal; 6-circumferential oil sealing edge; 7-indexing hole; 11-pulley; 12-waisted hole A; 13-crank; 14-connecting rod; 15-clamp base; 16-screw pin; 17-main shaft sleeve; 18-bushing; 19-flange; 20-sliding bearing; 201-bearing inner hole; 202-bearing outer cylindrical surface; 21-rolling bearing group; 22-indexing screw; 23-base; 231-waisted hole B; 24-fixing frame; 241-U-shaped groove A; 242-dovetail groove; 243-U-shaped groove B; 25-locking knob; 26-measuring meter; 261-measuring needle; 262-dovetail ridge; 263-measuring dial; 27-adjusting knob; 28-ball screw DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and examples.

[0032] like Figures 2 to 6 As shown, an embodiment of the present invention proposes a sliding bearing forming surface multi-oil wedge processing and error detection device, including a sliding bearing forming surface multi-oil wedge processing fixture and a sliding bearing forming surface multi-oil wedge dynamic pressure cavity surface error detection device.

[0033] like Figures 2 to 4 As shown, the sliding bearing forming surface multi-oil wedge processing fixture includes a pulley 11, a crank 13, a connecting rod 14, a clamp body 15, a main shaft sleeve 17, a bushing 18, and a flange 19. The crank 13 is provided with a waist-shaped hole A12, and the pulley 11 is fixedly installed through the waist-shaped hole A12. The crank 13 and the connecting rod 14 are pin-connected; a positioning step is provided on one side of the main shaft sleeve 17, and the positioning step of the main shaft sleeve 17 and the center of the inner hole of the clamp body 15 are positioned by a screw pin 16, and then the connecting rod 14 forms a pin connection between the rocker and the connecting rod in the crank rocker mechanism; the bushing 18 is fixedly installed in the inner hole of the clamp body 15; the processed sliding bearing 20, its bearing outer cylindrical surface 202 is connected with the bushing 18 in a rotating movable manner through the rolling bearing group 21. The rolling bearing group 21 can be in the form of rolling balls installed in a ball frame, or in the form of needle rollers installed in a ball frame; the right end of the clamping body 15 is fixedly installed with a flange 19, and the outer end face of the flange 19 is provided with threaded holes with the same number of oil wedge dynamic pressure cavity surfaces as the sliding bearing forming surface and evenly distributed around the circumference; the sliding bearing 20 is also provided with indexing holes 7 with the same number of oil wedge dynamic pressure cavity surfaces as the sliding bearing forming surface and evenly distributed around the circumference, and the sliding bearing 20 is fixedly connected to the threaded hole of the flange 19 through an indexing screw 22 in the indexing hole 7.

[0034] The outer cylindrical surface rotation center of the bushing 18 and the inner cylindrical surface rotation center may not coincide, and the eccentricity and phase angle position need to be based on Figure 1The eccentric arc of the dynamic pressure cavity surface of the sliding bearing 20 shown in the figure is determined by the processing requirements. After the bushing 18 is installed in the clamp body 15, the sliding bearing 20 is fixed with the flange 19 so that the center O2 of the eccentric arc of the sliding bearing 20 coincides with the rotation center of the outer cylindrical surface of the bushing 18.

[0035] like Figure 2 As shown, the bearing inner hole 201 of the sliding bearing 20 is further provided with a circumferential oil sealing edge 6 , and the bearing end face 4 of the sliding bearing 20 is in a perpendicular relationship to the bearing inner hole 201 .

[0036] like Figure 5 and Figure 6 As shown, a sliding bearing oil chamber profile multi-oil wedge dynamic pressure chamber profile error detection device includes a base 23, a fixing frame 24, a measuring gauge 26, and two ball screws 28; the base 23 is disc-shaped, with an arc hole on one side and two waist-shaped holes B231 on the other side; a U-shaped groove B243 is provided in the middle of the fixing frame 24 along the up and down directions; the fixing frame 24 is fixedly connected to the base 23 by a screw passing through the waist-shaped hole B231 of the base 23 at the bottom; a U-shaped groove A241 is also provided on one side above the fixing frame 24, and a dovetail groove 24 is provided on the outside of the U-shaped groove A241; a measuring needle 261 is provided at the lower end of the measuring gauge 26, and a dovetail ridge 262 is provided on the upper side to be slidably connected to the dovetail groove 24 of the fixing frame 24; a measuring dial 263 is provided on the other side above the measuring gauge 26 for displaying the reading of the measuring needle 261. The U-shaped groove A241 of the fixing bracket 24 is locked by a locking knob 25, securing the sliding connection between the dovetail ridge 262 and the dovetail groove 24. A ball screw 28 has a ball structure on one end and threads on the other; the two ball screws 28 are threadedly secured to the base 23. An adjustment knob 27 is located above the fixing bracket 24 to adjust the size of the opening of the U-shaped groove B243.

[0037] During installation and use, the measuring needle 261 of the measuring gauge 26 is passed through the arc-shaped hole of the base 23 so that the measuring needle 261 can rest against the bearing inner hole 201 of the sliding bearing 20; the measuring gauge 26 may also not be provided with a measuring dial 263, but the data measured by directly placing the measuring needle 261 against the bearing inner hole 201 of the sliding bearing 20 can be sent out in the form of signal transmission for data processing.

[0038] When machining the multi-oil wedge dynamic pressure cavity profile of the sliding bearing forming surface, proceed as follows:

[0039] S1: Obtaining the swing angle α of the multi-oil wedge machining fixture of the sliding bearing forming surface: Obtaining the central angles β and α corresponding to the axial oil sealing edge 1 and the dynamic pressure cavity forming surface 2 respectively according to the multi-oil wedge structural characteristics of the forming surface of the bearing inner hole 201 of the sliding bearing 20;

[0040] S2: Use a V-shaped frame to support the outer cylindrical surface of the clamp body 15 on the machine tool workbench so that the center of the outer cylindrical surface of the bushing 18 coincides with the center line of the top of the headstock;

[0041] S3: Adjust the connection between the crank 13 and the pulley 11 along the waist-shaped hole A12 of the crank 13 to change the size of the crank's rotation radius so that the swing angle of the rocker of the crank rocker mechanism of the sliding bearing forming surface multi-oil wedge machining fixture is α;

[0042] S4: Adjust the position of the fixed connection center O1 of the crank 13 and the pulley 11 so that when the crank rocker mechanism of the sliding bearing forming surface multi-oil wedge processing fixture is at the two extreme positions of the rocker, which are also the intersection of the sliding bearing forming surface multi-oil wedge dynamic pressure cavity surface 2 and the static pressure cavity 3, and the intersection of the axial oil sealing edge 1 and the multi-oil wedge dynamic pressure cavity surface 2, the two positions meet the two machining extreme positions of the internal grinding wheel for internal grinding;

[0043] S5: Start the headstock motor, so that the headstock spindle rotates and drives the pulley 11, so that the multi-oil wedge machining fixture of the sliding bearing forming surface swings, and the inner circle grinding tool extends into the bearing inner hole 201 of the sliding bearing 20 for grinding;

[0044] S6: Loosen the indexing screw 22, rotate the sliding bearing 20, and grind the next dynamic pressure cavity profile 2 of the multi-oil wedge forming surface; repeat several times until the multi-oil wedge dynamic pressure cavity profile 2 of the forming surface is processed;

[0045] S7: The spherical structures of the two ball screws 28 in the sliding bearing forming surface multi-oil wedge dynamic pressure cavity profile error detection device are placed against the circumferential oil sealing edge 6 of the sliding bearing 20, and the bottom surface of the base 23 is in contact with the bearing end face 4 of the sliding bearing 20. A measuring gauge 26 is installed on the fixing frame 24 so that the measuring needle 261 of the measuring gauge 26 passes through the arc-shaped hole of the base 23 and rests on the oil cavity profile of the sliding bearing 20. The contact force between the measuring needle 261 and the oil cavity profile of the sliding bearing 20 is adjusted by adjusting the knob 27. The base 23 is pushed to rotate along the edge of the bearing inner hole 201 of the sliding bearing 20. The oil film gap between the forming surface multi-oil wedge dynamic pressure cavity profile 2 and the main shaft neck and the depth h1-h0 of the junction between the dynamic pressure cavity profile 2 and the static pressure cavity 3 are obtained by measuring the needle 261.

[0046] S8: By scraping, the depth h1-h0 of the oil wedge dynamic pressure cavity profile 2 of the molding surface obtained by the measuring needle 261 is made consistent.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent structural changes made by using the contents of the present invention description and drawings are also included in the scope of the present invention.

Claims

1. A sliding bearing forming surface multi-oil wedge processing and error detection device, characterized by: It includes a multi-oil wedge processing fixture for the sliding bearing forming surface and a multi-oil wedge dynamic pressure cavity profile error detection device for the sliding bearing forming surface. The multi-oil wedge processing fixture for the sliding bearing forming surface forms a crank rocker mechanism through a pulley, a crank, a connecting rod and a clamp body, and is used for the processed sliding bearing to follow the crank rocker mechanism to swing back and forth, thereby realizing the movement of grinding processing of the multi-oil wedge dynamic pressure cavity profile of the sliding bearing forming surface. The flange end face on the clamp body is used to fix the processed sliding bearing, and an eccentric structure bushing is installed in the clamp body to realize the adjustment of the eccentric arc center of the dynamic pressure cavity profile of the multi-oil wedge structure of the sliding bearing forming surface. A rolling bearing group is arranged between the bushing and the processed sliding bearing, and the rolling bearing group and the bushing make the forming surface multi-oil wedge dynamic pressure cavity profile error detected. The arc center of the oil wedge dynamic pressure cavity profile coincides with the center of the clamp body, forming the rotation center of the crank rocker mechanism rocker; by adjusting the center of the pulley, the processed sliding bearing is driven by the head frame motor to swing and the required dynamic pressure cavity profile is obtained by grinding with the internal grinding tool; the sliding bearing forming surface multi-oil wedge dynamic pressure cavity profile error detection device includes a base, a fixing frame, a measuring meter, and two ball screws. The bottom surface of the base contacts the bearing end face of the sliding bearing, and the spherical structures of the two ball screws rest on the circumferential oil sealing edge of the sliding bearing. The measuring meter is installed on the fixing frame for detecting the oil film gap between the multi-oil wedge dynamic pressure cavity profile of the sliding bearing forming surface and the main shaft neck, as well as the depth of the junction between the dynamic pressure cavity profile and the static pressure cavity.

2. The sliding bearing forming surface multi-oil wedge processing and error detection device according to claim 1, characterized in that: The sliding bearing forming surface multi-oil wedge processing fixture includes a pulley, a crank, a connecting rod, a clamping body, a main shaft sleeve, a bushing, and a flange. The crank is provided with a waist-shaped hole A, and the pulley is fixedly installed through the waist-shaped hole A, and the crank and the connecting rod pin are connected; a positioning step is provided on one side of the main shaft sleeve, and the positioning step of the main shaft sleeve and the center of the inner hole of the clamping body are positioned by a screw pin to form a rocker in the crank rocker mechanism, and the rocker is connected to the pin of the connecting rod; the bushing is fixedly installed in the inner hole of the clamping body; the bushing is installed with the processed sliding bearing through the rolling bearing group, and the right end of the clamping body is fixedly installed with a flange, and the outer end face of the flange is provided with threaded holes with the same number and circumferentially evenly distributed as the multi-oil wedge dynamic pressure cavity profiles on the sliding bearing forming surface; the sliding bearing is fixedly connected to the threaded hole of the flange through a dividing screw in the dividing hole on the sliding bearing with the same number and circumferentially evenly distributed as the multi-oil wedge dynamic pressure cavity profiles on the sliding bearing forming surface.

3. The sliding bearing forming surface multi-oil wedge processing and error detection device according to claim 2, characterized in that: When the bushing is installed in the clamping body and the flange fixes the sliding bearing, the center of the eccentric arc of the sliding bearing coincides with the rotation center of the outer cylindrical surface of the bushing.

4. The sliding bearing forming surface multi-oil wedge processing and error detection device according to claim 1, characterized in that: The rolling bearing group adopts a structure in which rolling balls are installed in a ball frame, or adopts a structure in which rolling needles are installed in a ball frame.

5. The sliding bearing forming surface multi-oil wedge processing and error detection device according to claim 1, characterized in that: The base in the sliding bearing forming surface multi-oil wedge dynamic pressure cavity profile error detection device is disc-shaped, with an arc hole on one side and two waist-shaped holes B on the other side; a U-shaped groove B is provided in the middle of the fixing frame along the up and down directions; the fixing frame is fixedly connected to the base through the waist-shaped hole B of the base through a screw at the bottom; a U-shaped groove A is also provided on the upper side of the fixing frame, and a dovetail groove is provided on the outer side of the U-shaped groove A; a measuring needle is provided at the lower end of the measuring meter, and a dovetail ridge is provided on the upper side for sliding connection with the dovetail groove of the fixing frame; a measuring dial is provided on the other side above the measuring meter for displaying the reading of the measuring needle, and the U-shaped groove A of the fixing frame is locked by a locking knob to slide the dovetail ridge and the dovetail groove, and a ball screw is provided at one end and a thread is provided at the other end; the two ball screws are fixed to the base through threads, and an adjustment knob is provided on the top of the fixing frame to adjust the size of the opening of the U-shaped groove B.

6. The sliding bearing forming surface multi-oil wedge processing and error detection device according to claim 5, characterized in that: When installed and used, the measuring needle of the measuring meter passes through the arc-shaped hole of the base, so that the measuring needle abuts against the bearing inner hole of the sliding bearing.

7. A method for machining a multi-oil wedge dynamic pressure cavity profile on a sliding bearing forming surface, using the sliding bearing forming surface multi-oil wedge machining and error detection device according to any one of claims 1 to 6, characterized in that: The steps are as follows: Step 1: Obtain the swing angle of the multi-oil wedge machining fixture for the sliding bearing forming surface α :According to the multi-oil wedge structure characteristics of the inner hole of the sliding bearing, the central angles corresponding to the axial oil sealing edge and the dynamic pressure cavity profile are obtained. β and α ; Step 2: Use a V-shaped frame to support the outer cylindrical surface of the clamp on the machine tool workbench so that the center of the outer cylindrical surface of the bushing coincides with the center line of the top of the headstock; Step 3: Adjust the connection position between the crank and the pulley in the crank rocker mechanism, change the size of the crank rotation radius, so that the sliding bearing forming surface has more oil wedges. The swing angle of the crank rocker mechanism of the machining fixture is α ; Step 4: Adjust the position of the fixed connection center O1 of the crank and the pulley so that when the crank rocker mechanism of the sliding bearing forming surface multi-oil wedge processing fixture is at the two extreme positions of the rocker, it is also the intersection of the sliding bearing forming surface multi-oil wedge dynamic pressure cavity surface and the static pressure cavity, and the intersection of the axial oil sealing edge and the multi-oil wedge dynamic pressure cavity surface, which meet the two processing extreme positions of the internal grinding wheel for internal grinding; Step 5: Start the headstock motor, so that the headstock spindle rotates and drives the pulley, so that the oil wedge processing fixture of the sliding bearing forming surface swings, and the inner circle grinding tool extends into the bearing inner hole of the sliding bearing for grinding; Step 6: Loosen the indexing screw, rotate the sliding bearing, and grind the next dynamic pressure cavity surface of the forming surface with multiple oil wedges; repeat several times until the dynamic pressure cavity surface of the forming surface with multiple oil wedges is processed; Step seven: place the spherical structures of the two ball screws in the error detection device for the multi-oil wedge dynamic pressure cavity profile of the sliding bearing against the circumferential oil sealing edge of the sliding bearing, and the bottom surface of the base contacts the bearing end face of the sliding bearing. Install a measuring meter on the fixed frame so that the measuring needle of the measuring meter passes through the arc hole of the base and rests on the oil cavity profile of the sliding bearing. Adjust the contact force between the measuring needle and the oil cavity profile of the sliding bearing by adjusting the knob; push the base to rotate along the edge of the bearing inner hole of the sliding bearing, and obtain the oil film gap between the multi-oil wedge dynamic pressure cavity profile of the forming surface and the main shaft neck, as well as the depth h1-h0 of the junction between the dynamic pressure cavity profile and the static pressure cavity by the measuring needle. h1 is the oil film gap between the dynamic pressure cavity profile and the main shaft neck at the junction of the multi-oil wedge dynamic pressure cavity profile and the static pressure cavity of the sliding bearing forming surface, and h0 is the oil film gap between the axial oil sealing edge and the main shaft neck. Step 8: Scrape the surface of the forming surface to make the depth h1-h0 of the oil wedge dynamic pressure cavity obtained by the measuring needle consistent.

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