CN110936105A - Processing method of axial anti-rotation bearing - Google Patents
Processing method of axial anti-rotation bearing Download PDFInfo
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- CN110936105A CN110936105A CN201910930675.9A CN201910930675A CN110936105A CN 110936105 A CN110936105 A CN 110936105A CN 201910930675 A CN201910930675 A CN 201910930675A CN 110936105 A CN110936105 A CN 110936105A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
Abstract
The invention aims to overcome the defects of the prior art and provides a method for processing an axial anti-rotation bearing. The method comprises the following steps: s1, roughly machining by a lathe, S2, clamping the excircle of a process lug, machining at a turning and milling composite center, S3, positioning by using a turning tool through a workpiece inner hole, pressing the large end of the workpiece by a pressing plate, and turning the end face of the small end of the workpiece; s4, an inner hole milling tool is used, the outer circle of the small end of the workpiece is positioned, the end face anti-rotation groove is used for limiting, the pressing plate is pressed against the large end of the workpiece, the inner hole of the workpiece is aligned, and an inner hole oil wedge surface is milled.
Description
Technical Field
The invention belongs to the technical field of manufacturing and processing of ship engines, and particularly relates to a processing method of an axial anti-rotation bearing.
Background
The turbocharger is one of the most important core matching systems of the diesel engine, the design and manufacturing technology difficulty is high, the added value is high, and the supercharger technology for the domestic high-power low-speed diesel engine is monopolized by foreign companies. The axial flow supercharger is a new domestic product series for the low-speed diesel engine with independent brands. In order to develop the industrialization of the low-speed diesel engine for the independent brand ship in China in future, the axial-flow supercharger for the low-speed diesel engine of the type is developed by the inventor, wherein the core part high-speed sliding bearing has higher requirements on the structure, the size and the form and position tolerance and directly influences the service life of the whole engine, so that the manufacturing quality of the part is stable and reliable and is of great importance.
The floating bearing is made of CuZn40Al2, and has a structure shown in figures 1 a-3, wherein the relative position relation among an end surface oil wedge surface, an inner hole oil groove, an inner hole oil return groove and an end surface anti-rotation groove has high requirements, the form and position tolerance of an inner hole, an outer circle and an end surface has high requirements, the dimensional tolerance grades are all more than 6 grades, and the surface roughness requirements of all the matching requirements are all Ra0.8. The requirements of form and position tolerance and roughness of each part are required to be guaranteed in the machining process, the end face oil wedge and the inner hole oil wedge must be guaranteed to be machined at one time due to the structural particularity, repair processing cannot be conducted, and parts are required to be prevented from deforming (materials are softer), so that the machining difficulty is very high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for processing an axial anti-rotation bearing.
The purpose of the invention is realized as follows:
a processing method of an axial anti-rotation bearing comprises the following steps:
s1, rough machining by a lathe, comprising the following steps:
s11, clamping the excircle of the large end of the workpiece, roughly turning the excircle and the step surface of the small end of the workpiece, cutting off the large allowance of the end part of the small end of the workpiece, and leaving a process lug, wherein the thickness of the groove connecting part of the process lug is kept to be 2-3 mm;
s12, clamping the outer circle of the process lug, and roughly turning the outer circle and the end face of the large end of the workpiece;
s2, clamping the outer circle of the technical lug, and machining in a turning and milling composite center, wherein the machining comprises the following steps:
s21, semi-finish turning the excircle and the step surface of the small end of the workpiece, the excircle and the end surface of the large end of the workpiece and the inner hole of the workpiece;
s22, drilling three uniformly distributed excircle holes on the circumference of the small end of the workpiece, roughly milling an inner hole oil groove by using a special inner hole oil groove rough milling cutter, and finely milling an inner hole oil groove by using a special inner hole oil groove fine milling cutter;
s23, processing an inner hole oil return groove of the workpiece by an oil return groove slotting tool;
s24, end face anti-rotation grooves and end face oil grooves are uniformly distributed on the step face of the milling workpiece;
s25, cutting the groove connecting part of the process lug to the thickness of 0.5-1 mm;
s26, finely turning the outer circle and the step surface of the small end of the workpiece and the inner hole of the workpiece;
s27, milling an end face oil wedge surface of the large end of the workpiece;
s28, cutting off the process lug;
s3, positioning by using a turning tool through an inner hole of the workpiece, pressing the large end of the workpiece by using a pressing plate, and turning the end face of the small end of the workpiece;
s4, an inner hole milling tool is used, the outer circle of the small end of the workpiece is positioned, the end face anti-rotation groove is used for limiting, the pressing plate is pressed against the large end of the workpiece, the inner hole of the workpiece is aligned, and an inner hole oil wedge surface is milled.
Preferably, in step S1, a machining allowance of 0.8-1.5mm is reserved in the radial direction of the workpiece, and a machining allowance of 1-1.5mm is reserved in the axial direction of the workpiece (except for the small end, which cannot be machined due to the process lug).
Preferably, in step S21, machining allowance of 0.1-0.2mm is left for the outer circle of the small end of the workpiece, the step surface and the inner hole of the workpiece.
Preferably, in step S22, the size of the special rough milling cutter and the special fine milling cutter for inner bore oil grooves is made to correspond to the size of the inner bore oil grooves.
Due to the adoption of the technical scheme, the axial-flow anti-rotation bearing solves the processing difficulty of the novel axial-flow anti-rotation bearing, provides technical support for the development and application of the axial-flow supercharger for the low-speed diesel engine, and prolongs the service life of the axial-flow anti-rotation bearing.
Drawings
FIG. 1a is a schematic view of an axial anti-rotation bearing;
FIG. 1B is a schematic cross-sectional view B-B of FIG. 1;
FIG. 2a is a schematic view of an end face oil wedge;
FIG. 2b is a schematic cross-sectional view J-J of FIG. 2 a;
FIG. 2c is a schematic cross-sectional view H-H of FIG. 2 a;
FIG. 3 is a view of the inner bore oil wedge structure;
FIG. 4 is a schematic view of a roughing residue process lug;
FIG. 5a is a schematic view of a rough milling cutter with oil grooves;
FIG. 5b is a schematic view of a finish milling cutter for oil grooves;
FIG. 6a is a schematic view of a slotting tool of an oil return groove;
FIG. 6b is a side view of FIG. 6 a;
FIG. 7 is a schematic view of a floating sleeve end turning tool;
FIG. 8 is a schematic view of an internal bore oil wedge milling tool.
Reference numerals
In the attached drawing, 1 is the work piece, 2 is the main aspects, 3 is the tip, 4 is the step face, 5 is the technology lug, 6 is the hole, 7 is outer round hole, 8 is the hole oil groove, 9 is the terminal surface anti-rotation groove, 10 is the terminal surface oil wedge face, 11 is the location base, 12 is the clamp plate, 13 is compression screw, 14 is the locating pin, 15 is the positioning core axle, 16 is the terminal surface oil groove, 17 is the annular, 18 is the hole oil wedge face, 19 is the hole oil groove.
Detailed Description
A processing method of an axial anti-rotation bearing comprises the following steps:
1) preparing a workpiece blank, roughly turning the small end with large allowance, reserving a process lug, and reserving 2-3mm at the connection position of the cutting groove;
2) roughly turning the allowance of the large end, radially reserving the allowance of 0.8-1.5mm for the part, and axially reserving the allowance of 1-1.5mm, wherein the result is shown in figure 4 after two rough machining procedures are finished;
3) performing finish machining in a turning and milling compound center,
processing a ring groove by using a grooving cutter, semi-finish turning all the surfaces by using an end surface cutter, reserving a machining allowance of 0.1-0.2mm for a small end excircle, a step surface and a workpiece inner hole, processing the rest surfaces in place, drilling outer circle holes uniformly distributed on the circumference by using 3, processing an inner hole oil return groove by using a special inner hole oil groove coarse milling cutter, a special inner hole oil groove fine milling cutter, processing an inner hole oil return groove by using an oil return groove slotting cutter, milling an end surface anti-rotation groove and an end surface oil groove, cutting a connecting groove at a process lug position to 0.5-1mm, finish turning the small end excircle, the step surface and the workpiece inner hole to the requirements, milling an end surface oil wedge, cutting off the process lug after the measured depth meets the drawing requirements on a main shaft (fig. 5a, fig. 5b, fig. 6a and fig. 6b, cutting off according to the length requirement, and;
4) positioning the inner hole by using a floating sleeve turning tool, compacting the end face, increasing the contact area by using a circular pressing plate in order to avoid crushing the part, and requiring higher planeness of the pressing plate to prevent compression deformation, wherein the small end face of the floating sleeve is turned to ensure the drawing requirement, as shown in fig. 7;
5) using a floating sleeve inner hole milling tool, positioning an outer circle, limiting an end face anti-rotation groove, aligning an inner hole, wherein the end face of a large end is in a required range (the end face of the large end is provided with an oil wedge surface part and is also provided with a leveling section close to the outer circle to be simultaneously aligned), adopting a copper pressing plate to mill the oil wedge surface of the inner hole according to a numerical control program in order to avoid crushing the part, striking a surface on a main shaft, and taking down the part after confirming that the oil wedge surface is deeply sunk to meet the drawing requirement, as shown in figure 8;
6) and removing all sharp edges and burrs, and lettering according to the drawing requirements.
The technical scheme requires that a proper process route and a specific machining tool are adopted, the process lug is reserved and the cutting scheme of the process lug is limited, the machining sequence is limited in the working procedure to ensure that the part machining requirement is met, the problems of clamping deformation, machining deformation and the like easily occurring in the part machining process are solved, and the design requirement of the axial anti-rotation bearing can be met.
Theoretical basis a: according to the structural characteristics of the part, the end face, the excircle, the inner hole, the end face oil wedge, the inner hole oil groove and the oil return groove are machined in one clamping process, the relative position relation among the end face, the excircle, the inner hole, the end face oil wedge, the inner hole oil groove and the oil return groove can be ensured, the clamping can be realized in a manner of a reserved process lug, and the deformation of a part body caused by the clamping is avoided, so that the part is ensured to meet the design requirement, and;
theoretical basis b: the relative position requirement between the oil wedge surface of the inner hole and the oil groove structure is not particularly high, but the relative position requirement is still required to be ensured according to the use state of the oil wedge surface, the oil wedge surface can be limited by using an end surface groove, and the relative position requirement is ensured by using a tool in the machining process;
theoretical basis c: the turning and milling composite center can carry out turning processing with higher precision and common milling and drilling processing, most of the processing of the part can be finished in the part, and the precision requirement of the part can be met;
theoretical basis d: by utilizing a numerical control milling center and using a milling tool, the inner hole base circle is aligned and the positioning tool is milled within a required range according to program points, the milling condition of the inner hole oil wedge surface can be reflected visually by marking a surface through a main shaft, and the drawing requirements are met.
The concrete solution is as follows:
according to the theoretical analysis, a set of reliable and stable processing method is found for the processing and manufacturing of the axial anti-rotation floating sleeve through a plurality of sets of schemes and method adjustment verification, and the problems are successfully solved.
Firstly, the clamping deformation problem is solved by a method of reserving a process lug, the connecting part between the process lug and a part main body is required to be as thin as possible, the release of internal stress by a groove is finished in rough machining, and the local deformation of the part caused by the release of the internal stress in the finish machining process is avoided;
and then finishing the processing of an inner hole, an outer circle, an end face oil wedge, an end face groove, a hole, an inner hole oil groove and an oil return groove on a turning and milling composite processing machine tool, wherein the inner hole oil groove and the oil return groove are processed by using a special tool due to the special structure, the outer circle and the inner hole base circle can be finally finished by finish machining after the inner hole oil groove is processed, the end face can be processed to the drawing size after the end face groove is processed, and the deformation caused by a large-allowance milling process is avoided. The main shaft is required to be marked in the end surface oil wedge processing, the process lug can be cut off only after the end surface oil wedge sinking depth is checked to meet the drawing requirements, and the part is taken down;
and finally, an inner hole oil wedge surface milling tool is used, the outer circle and the end face are positioned, the end face groove is limited, an inner hole base circle and a large end face are aligned, the inner hole oil wedge surface is milled according to a program, the requirements in the drawing are met, the inner hole base circle is used as the standard in the machining process, and the part can be taken down after the sinking requirement of the oil wedge surface is verified by a spindle surface.
The successful implementation of the manufacturing scheme solves the processing difficulty of the novel axial anti-rotation bearing, provides technical support for the development and application of the axial flow supercharger for the low-speed diesel engine and prolongs the service life of the axial flow supercharger.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (4)
1. The processing method of the axial anti-rotation bearing is characterized by comprising the following steps:
s1, rough machining by a lathe, comprising the following steps:
s11, clamping the excircle of the large end of the workpiece, roughly turning the excircle and the step surface of the small end of the workpiece, cutting off the large allowance of the end part of the small end of the workpiece, and leaving a process lug, wherein the thickness of the groove connecting part of the process lug is kept to be 2-3 mm;
s12, clamping the outer circle of the process lug, and roughly turning the outer circle and the end face of the large end of the workpiece;
s2, clamping the outer circle of the technical lug, and machining in a turning and milling composite center, wherein the machining comprises the following steps:
s21, semi-finish turning the excircle and the step surface of the small end of the workpiece, the excircle and the end surface of the large end of the workpiece and the inner hole of the workpiece;
s22, drilling three uniformly distributed excircle holes on the circumference of the small end of the workpiece, roughly milling an inner hole oil groove by using a special inner hole oil groove rough milling cutter, and finely milling an inner hole oil groove by using a special inner hole oil groove fine milling cutter;
s23, processing an inner hole oil return groove of the workpiece by an oil return groove slotting tool;
s24, end face anti-rotation grooves and end face oil grooves are uniformly distributed on the step face of the milling workpiece;
s25, cutting the groove connecting part of the process lug to the thickness of 0.5-1 mm;
s26, finely turning the outer circle and the step surface of the small end of the workpiece and the inner hole of the workpiece;
s27, milling an end face oil wedge surface of the large end of the workpiece;
s28, cutting off the process lug;
s3, positioning by using a turning tool through an inner hole of the workpiece, pressing the large end of the workpiece by using a pressing plate, and turning the end face of the small end of the workpiece;
s4, an inner hole milling tool is used, the outer circle of the small end of the workpiece is positioned, the end face anti-rotation groove is used for limiting, the pressing plate is pressed against the large end of the workpiece, the inner hole and the large end face of the workpiece are aligned, and an inner hole oil wedge surface is milled.
2. The processing method of the axial anti-rotation bearing according to claim 1, characterized in that: in step S1, a machining allowance of 0.8-1.5mm is reserved in the radial direction of the workpiece, and a machining allowance of 1-1.5mm is reserved in the axial direction of the workpiece.
3. The processing method of the axial anti-rotation bearing according to claim 1, characterized in that: in step S21, machining allowance of 0.1-0.2mm is reserved for the outer circle of the small end of the workpiece, the step surface and the inner hole of the workpiece.
4. The processing method of the axial anti-rotation bearing according to claim 1, characterized in that: in step S22, the size of the special inner bore oil groove rough milling cutter and the inner bore oil groove fine milling cutter is made to correspond to the size of the inner bore oil groove.
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| CN201910930675.9A CN110936105A (en) | 2019-09-29 | 2019-09-29 | Processing method of axial anti-rotation bearing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623041A (en) * | 2020-06-08 | 2020-09-04 | 无锡市联谊机车配件制造有限公司 | Thrust bearing gasket and processing technology thereof |
| CN112475797A (en) * | 2020-11-13 | 2021-03-12 | 中国船舶重工集团公司第七0七研究所 | Efficient machining process method for rotor filling block |
| CN112710212A (en) * | 2020-12-21 | 2021-04-27 | 重庆江增船舶重工有限公司 | Machining and detecting method for improving detection efficiency of floating sleeve inner hole oil wedge |
| CN112792500A (en) * | 2020-11-11 | 2021-05-14 | 中国航发沈阳黎明航空发动机有限责任公司 | Machining method for oil return groove of welding bearing seat |
| CN113814666A (en) * | 2021-10-13 | 2021-12-21 | 重庆江增船舶重工有限公司 | Milling method for oil wedge on end surface of floating disc |
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