CN112059188A - Control method based on powder metallurgy rotor manufacturing process - Google Patents
Control method based on powder metallurgy rotor manufacturing process Download PDFInfo
- Publication number
- CN112059188A CN112059188A CN202010909990.6A CN202010909990A CN112059188A CN 112059188 A CN112059188 A CN 112059188A CN 202010909990 A CN202010909990 A CN 202010909990A CN 112059188 A CN112059188 A CN 112059188A
- Authority
- CN
- China
- Prior art keywords
- rotor
- face
- cycloid
- outer rotor
- precision
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Rotary Pumps (AREA)
Abstract
The control method based on the powder metallurgy rotor manufacturing process comprises the steps of firstly modulating rotor material components, then designing a rotor structure and precision, then manufacturing a rotor according to the designed structure, matching an inner rotor and an outer rotor in the manufacturing process, and then simultaneously grinding end faces, so as to further improve the parallelism of the two end faces and the flatness of the two end faces, and mutually-based grinding improves the form and position tolerance of a front passage on the basis of not changing the form and position tolerance formed in the front, thereby effectively ensuring the consistency of product precision; a self-designed centerless grinding tool is adopted in the manufacturing process, so that the production efficiency is improved; the cycloid inner contour is subjected to cold extrusion processing by taking the cycloid inner contour as a reference, so that errors caused by clamping and positioning in other modes are avoided, and the jumping quantity between the cycloid inner contour subjected to cold extrusion and the excircle of the base body which is not ground is reduced to the maximum extent; meanwhile, the structural precision of the inner rotor is designed, and a corresponding process is adopted to realize controllable manufacturing precision, so that the comprehensive mechanical property and the manufacturing precision of the oil supplementing pump rotor are improved.
Description
Technical Field
The invention relates to the technical field of rotor precision control, in particular to a control method based on a powder metallurgy rotor manufacturing process.
Background
At present, the inner rotor and the outer rotor for the conventional oil pump are generally obtained by a powder metallurgy mode in mass production and manufacture, and can be used as finished products after being finished. However, the working pressure of the conventional rotor oil replenishing pump is generally lower than 1.5bar and not more than 3bar at most; the working pressure of the rotor oil replenishing pump applied to the plunger pump servo variable control exceeds 25bar for a long time, and the highest pressure is 30 bar. Under the action of high-pressure oil, the radial load of the inner rotor finally acts on the bearing through the driving shaft, and the radial load of the outer rotor acts on the side wall of the matching inner cavity of the oil compensating pump shell through the outer circle of the outer rotor. The inner rotor does not move relative to the driving shaft, but makes stress contact with the outer rotor to slide relatively, and the outer rotor and the side wall of the shell make stress contact to slide circumferentially; because dynamic hydraulic oil exists between the inner rotor and the outer rotor, the lubricating condition is relatively good, the outer rotor is in clearance fit with the side wall of the shell, the lubricating condition is poor, and in order to reduce the contact stress between the outer rotor and the side wall of the shell, the fit clearance precision of the outer rotor and the side wall of the shell needs to be controlled. In actual work, the rotation speed of the inner rotor and the outer rotor of the oil supplementing pump is changed quickly, the pressure impact is large, the oil supplementing pump is in a rated pressure state for a long time, the working condition is severe, and the inner rotor and the outer rotor are easy to damage; meanwhile, as the verticality, parallelism and runout among the geometric elements of the inner rotor and the outer rotor in the sintering process are not controllable, larger errors are caused to assembly, and the service performance and service life are seriously influenced.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a control method based on powder metallurgy rotor manufacturing process to solve the above problems in the background art.
The technical problem solved by the invention is realized by adopting the following technical scheme:
the control method based on the powder metallurgy rotor manufacturing process comprises the following specific steps:
1. modulating rotor material composition
Based on the requirements of the rotation speed, rated working pressure and working condition of the oil replenishing pump on the material, the material components of the inner rotor and the outer rotor are modulated;
the mass fraction of the inner rotor material modulation is as follows: 0.3-0.5% of C, 0.6-2.0% of Ni, 1.0-3.0% of Cu, and the balance of Fe; the outer rotor material comprises the following components in percentage by mass: 0.25-0.5% of C, 0.6-1.5% of Ni, 0.2-0.4% of Mo, 0.6-2% of Cu, and the balance of Fe;
2. designing rotor structure and precision
2.1) design of external rotor Structure and precision
The outer rotor structure geometric elements comprise cycloid inner profiles, matrix excircles, outer rotor left end faces and outer rotor right end faces, the outer rotor left end faces are designed to be outer rotor end face reference, the cycloid inner profiles are inner profile reference, the diameter of the matrix excircles is smaller than 100mm, and the thickness of the matrix excircles is smaller than 50 mm;
the design precision of the jumping quantity of the excircle of the matrix relative to the reference of the inner contour of the cycloid is required to be less than or equal to 0.051mm, and the design precision of the verticality of the excircle of the matrix relative to the reference of the end surface of the outer rotor is required to be less than or equal to 0.02 mm; the design precision requirement of the parallelism of the right end face of the outer rotor relative to the end face reference of the outer rotor is less than or equal to 0.006mm, and the design precision requirement of the perpendicularity of the cycloid inner profile relative to the end face reference of the outer rotor is less than or equal to 0.02 mm; the self-flatness design precision of the left end surface and the right end surface of the outer rotor is less than or equal to 0.003mm, and the surface roughness design precision is requiredR a0.8, the design accuracy requirements of the surface roughness of the inner contour of the cycloid and the outer circle of the matrix are allR a0.8；
2.2) design of inner rotor Structure and precision
The inner rotor structure geometric elements comprise a cycloid outer contour, an inner spline contour, an inner rotor left end face and an inner rotor right end face; an oil groove is arranged along the circumferential direction of the profile of the inner spline, the left end face of the inner rotor is designed to be the reference of the end face of the inner rotor, the profile of the inner spline is designed to be the reference of the inner spline, the maximum size of the periphery of the inner rotor is less than 80mm, and the thickness is less than 50 mm;
the design precision of the jumping quantity of the cycloid outer contour relative to the inner spline reference is required to be less than or equal to 0.064mm, and the design precision of the perpendicularity of the cycloid outer contour relative to the inner rotor end surface reference is required to be less than or equal to 0.02 mm; the design precision requirement of the parallelism of the right end face of the inner rotor relative to the reference of the end face of the inner rotor is less than or equal to 0.006mm, and the design precision requirement of the perpendicularity of the profile of the inner spline relative to the reference of the end face of the inner rotor is less than or equal to 0.02 mm; the self flatness design accuracy of the left end surface of the inner rotor and the right end surface of the inner rotor is less than or equal to 0.003mm, and the surface roughness design accuracy is requiredR a0.8, the design accuracy of the surface roughness of the cycloid outer contour is required to beR a0.8, the design accuracy requirement of the surface roughness of the profile of the internal spline isR a1.6；
3. Rotor accuracy control
3.1) outer rotor accuracy control
According to the outer rotor structure designed in the step 2), pressing a blank by adopting the materials of the outer rotor components in the step 1), performing liquid phase sintering on the outer rotor blank in an amino atmosphere to obtain all composition geometric elements, performing gas protection air cooling after sintering is completed, and performing low-temperature tempering after air cooling, wherein the tempering temperature is not higher than 250 ℃, and the tempering time is not more than 5 hours; then, the cycloid inner contour is used as a clamping and positioning reference, and the left end face and the right end face of the outer rotor are mutually used as references to finish-machine the left end face and the right end face so as to ensure the perpendicularity of the cycloid inner contour relative to the reference of the end face of the outer rotor, preliminarily ensure the parallelism of the right end face of the outer rotor relative to the reference of the end face of the outer rotor, and simultaneously ensure the jumping quantity of the outer circle of the matrix relative; the cycloid inner contour is processed by cold extrusion with the cycloid inner contour itself as a reference, so that errors caused by clamping and positioning in other modes are avoided, and the jumping quantity between the cycloid inner contour after cold extrusion and the excircle of the base body which is not ground is reduced to the maximum extent; grinding the two end faces of the inner rotor and the outer rotor which are paired in groups in a mutual reference manner so as to further improve the parallelism and the flatness of the two end faces, wherein the grinding in the mutual reference manner does not change the form and position tolerance formed in the front; finally, grinding the excircle of the finely turned base body by adopting a centerless grinder, wherein the grinding amount of the excircle of the base body is less than 0.02mm, removing flash burrs and residual magnetism on the edge of the centerless ground base body, and classifying the centerless ground base body according to the group size for storage for later use after anticorrosion treatment;
3.2) inner rotor precision control
According to the inner rotor structure designed in the step 2), the blank is pressed by adopting the material of the inner rotor component in the step 1), the inner rotor blank is subjected to liquid phase sintering in an amino atmosphere to obtain all the geometrical elements, after the sintering is finished, gas protection air cooling is carried out, low-temperature tempering is carried out after the air cooling, the tempering temperature is not higher than 250 ℃, the tempering time is not more than 5 hours, then the inner spline profile is used as a clamping positioning reference, the left end surface and the right end surface of the inner rotor are mutually referenced, and the left end surface and the right end surface of the inner rotor are finely turned to ensure the perpendicularity of the inner spline profile relative to the reference of the end; after finish turning, the inner spline profile is firstly processed by cold extrusion by taking the inner spline profile as a reference, errors caused by clamping and positioning in other modes are avoided, the jumping quantity between the inner spline profile after cold extrusion and the cycloid outer profile which is not subjected to cold extrusion is reduced to the maximum extent, the mould for processing the inner spline profile by cold extrusion and the inner spline profile are in an interference state at the moment, the interference state is kept, the cycloid outer profile is processed by cold extrusion by adopting a composite mould, the jumping quantity of the cycloid outer profile relative to the inner spline profile reference completely depends on the precision of the mould, and the perpendicularity of the cycloid outer profile relative to the inner rotor end surface reference can be ensured at the same time; finally, the two end faces of the inner rotor and the outer rotor which are matched with each other are ground in a mutual reference mode so as to further improve the parallelism and the flatness of the two end faces, and the mutual reference grinding improves the form and position tolerance of a front channel on the basis that the form and position tolerance formed in the front is not changed; the controllable precision of the inner rotor is as follows: the verticality is less than or equal to 0.016mm, the parallelism is less than or equal to 0.005mm, and the runout is less than or equal to 0.038mm, so that the design precision requirement is met; finally, removing flash and burr on the edge of the ground substrate, removing residual magnetism of the substrate, and sorting and warehousing for later use according to the sizes of the components after the corrosion prevention treatment.
In the invention, in step 3.1), the cycloid inner profile and the left end face of the outer rotor are used as positioning and clamping references, a chamfer is formed at the joint of the outer circle of the finish-turned substrate and the right end face of the outer rotor, and when the cycloid inner profile and the right end face of the outer rotor are used as the positioning and clamping references, the left end face of the outer rotor and the outer circle of the substrate keep a right angle, and grinding allowances are reserved on each turned end face; the numerical control machine tool is adopted for processing, and the verticality and the parallelism of the process are less than or equal to 0.015mm and less than or equal to 0.025 mm.
In the invention, in step 3.1), the left end face of the outer rotor is used as a supporting end face, the cycloid inner contour is subjected to cold extrusion processing by taking the cycloid inner contour as a reference, the radial clearance value during the assembly of the inner rotor and the outer rotor is required to be 0.08-0.13 mm, the manufacturing size of the cycloid inner contour on the periphery of a cold extrusion die is the upper limit size value of the cycloid inner contour, the manufacturing size of the cycloid outer contour on the cold extrusion die is the lower limit size value of the cycloid outer contour, the precision grade requirement of the die is not lower than 5 grade, and the assembly verticality requirement is not more than 0.008 mm.
In the invention, in step 3.1), grinding the paired two end faces of the inner rotor and the outer rotor with reference to each other, wherein the paired inner rotors finish cold extrusion processing and matrix soft nitriding treatment of cycloid outer contours and inner spline contours; the specific mode of grouping and pairing is that firstly, the requirement of axial side clearance for placing finished products of the inner rotor and the outer rotor into a cavity of a pump shell is determined, secondly, the pump bodies which are processed are grouped according to the depth of the cavity, the processing range of the axial size of the inner rotor and the outer rotor is calculated according to the value of the grouping size and the requirement of the side clearance, thirdly, the inner rotor and the outer rotor are selected according to the processing range of the axial size to be paired, and finally, the left end surface of the outer rotor, the right end surface of the outer rotor, the left end surface of the inner rotor and the right end surface of the inner rotor which are selected to be paired are ground in a way that two surfaces; in addition, the outer rotor grinds the right end face of the outer rotor before grinding; the parallelism obtained in the process is less than or equal to 0.006 mm.
In the invention, in step 3.1), the ground outer rotor is axially superposed on a centerless grinding tool, the centerless grinding tool comprises a guide cylinder, a pull rod, a fastening end cover, a tensioning end cover, a spring and a fastener for tensioning the fastening end cover and the tensioning end cover, the outer rotor is axially superposed on the guide cylinder, and the guide cylinder is provided with an excircle for supporting and matching with a small circle of a cycloid inner contour, an annular end face for axial limiting, an inner hole and an end face for matching and limiting with the tensioning end cover and an inner hole for matching and limiting with the fastening end cover; a tensioning end cover is arranged at one end of the guide cylinder, a fastening end cover is arranged at the other end of the guide cylinder, the pull rod simultaneously penetrates through the fastening end cover and the tensioning end cover and is in clearance fit with the fastening end cover and the tensioning end cover, an outer hexagonal is arranged on the pull rod positioned at the end of the tensioning end cover, the retainer ring is sleeved on the pull rod and is in fit contact with the outer hexagonal for limiting, and the spring is sleeved on the pull rod and is positioned between the tensioning end cover and the retainer ring; the pull rod positioned at the fastening end cover end is provided with external threads, the fastening piece is rotatably arranged on the pull rod and is used for tensioning the fastening end cover and the fastening end cover, the contact side of the fastening piece and the fastening end cover is provided with a spherical surface, the contact part of the fastening end cover and the fastening piece is provided with an arc, and the spherical surface is contacted with the arc; after tensioning, the spring is in a compression tensioning state, and the tensioning force is adjusted by rotating the fastening piece according to the requirement; the whole tool is in a flexible fastening state, and can be automatically aligned and ground under the action of the guide wheel during centerless grinding, so that clamping stagnation of hard fastening is avoided.
In the invention, in the step 3.2), the manufacturing size of the cycloid outer contour is the lower limit size value of the cycloid outer contour by using a cold extrusion die, the precision grade requirement of the die is not lower than 5 grade, the assembly verticality requirement is not more than 0.008mm, and the radial runout of the compound die is not more than 0.015 mm.
Has the advantages that: in the invention, the inner rotor and the outer rotor are matched and then the end faces are simultaneously ground, so as to further improve the parallelism of the two end faces and the planeness of the end faces, and the mutual reference grinding improves the form and position tolerance of the front channel on the basis of not changing the form and position tolerance formed in the front, thereby effectively ensuring the consistency of the product precision; a self-designed centerless grinding tool is adopted in the manufacturing process, so that the production efficiency is improved, and the matching of the outer rotor and the pump shell is a base hole system to ensure the matching precision requirement; the cycloid inner contour is subjected to cold extrusion processing by taking the cycloid inner contour as a reference, so that errors caused by clamping and positioning in other modes are avoided, and the jumping quantity between the cycloid inner contour subjected to cold extrusion and the excircle of the base body which is not ground is reduced to the maximum extent; meanwhile, the structural precision of the inner rotor is designed, and a corresponding process is adopted to realize controllable manufacturing precision, so that the comprehensive mechanical property and the manufacturing precision of the oil supplementing pump rotor are improved.
Drawings
Fig. 1 is a schematic structural diagram of an outer rotor in a preferred embodiment of the invention.
Fig. 2 is a side view of the outer rotor in the preferred embodiment of the present invention.
Fig. 3 is a schematic view of the inner rotor structure in the preferred embodiment of the present invention.
Fig. 4 is a side view of the inner rotor in the preferred embodiment of the present invention.
Fig. 5 is a schematic structural view of a centerless grinding tool in a preferred embodiment of the invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
The control method based on the powder metallurgy rotor manufacturing process comprises the following specific steps:
1. modulating rotor material composition
Based on the requirements of the rotation speed, rated working pressure and working condition of the oil replenishing pump on the material, the material components of the inner rotor and the outer rotor are modulated;
the inner rotor comprises the following materials in percentage by mass: 0.3-0.5% of C, 0.6-2.0% of Ni, 1.0-3.0% of Cu, and the balance of Fe; the outer rotor comprises the following components in percentage by mass: 0.25-0.5% of C, 0.6-1.5% of Ni, 0.2-0.4% of Mo, 0.6-2% of Cu, and the balance of Fe;
2. designing rotor structure and precision
2.1) design of external rotor Structure and precision
The outer rotor structure is shown in fig. 1 and 2, and the geometric elements comprise: cycloid inner contourNOuter circle of the substratedLeft end face of outer rotore 1Right end face of outer rotore 2Designing the left end face of the outer rotore 1For external rotor end face referenceACycloid internal profileNIs an inner contour referenceBOuter circle of base bodydDiameter of<100mm, thickness<50mm；
Outer circle of the substratedRelative inner contour datumBThe design precision requirement of the runout quantity is less than or equal to 0.051mm, and the runout quantity is relative to the end surface reference of the outer rotorAThe design precision requirement of the verticality is less than or equal to 0.02 mm; right end face of outer rotore 2Relative outer rotor end surface referenceAThe design accuracy of the parallelism of the cycloid curve is less than or equal to 0.006mm and the inner contour of the cycloid curveNRelative outer rotor end surface referenceAThe design precision requirement of the verticality is less than or equal to 0.02 mm; left end face of outer rotore 1And the right end face of the outer rotore 2The self-flatness design precision requirement is less than or equal to 0.003mm, and the surface roughness design precision requirement isR a0.8, cycloid inner contourNAnd the outer circle of the base bodydThe surface roughness design accuracy requirements are allR a0.8；
2.2) design of inner rotor Structure and precision
The inner rotor structure is shown in fig. 3 and 4, and the geometrical elements comprise: cycloid external contourWInternal spline profileSLeft end face of inner rotore 3Right end face of inner rotore 4(ii) a Along the profile of the internal splineSOil grooves are uniformly distributed in the circumferential direction, and the left end surface of the inner rotor is designede 3For internal rotor end face datumCInternal spline profileSFor internal spline referenceDMaximum size of outer periphery of inner rotor<80mm, thickness<50mm；
Cycloid external contourWRelative internal spline datumDThe design precision requirement of the runout quantity is less than or equal to 0.064mm, and the runout quantity is relative to the end surface reference of the inner rotorCThe design precision requirement of the verticality is less than or equal to 0.02 mm; right end face of inner rotore 4End face reference of relative inner rotorCThe design precision requirement of parallelism is less than or equal to 0.006mm, and the profile of the internal splineSEnd face reference of relative inner rotorCThe design precision requirement of the verticality is less than or equal to 0.02 mm; left end face of inner rotore 3And the right end face of the inner rotore 4The self-flatness design precision requirement is less than or equal to 0.003mm, and the surface roughness design precision requirement isR a0.8, cycloid outer contourWThe design precision of the surface roughness is required to beR a0.8, internal spline profileSThe surface roughness design accuracy ofR a1.6；
3. Rotor accuracy control
3.1) outer rotor accuracy control
According to the outer rotor structure designed in the step 2), pressing a blank by adopting the materials of the outer rotor components in the step 1), performing liquid phase sintering on the outer rotor blank in an amino atmosphere to obtain all composition geometric elements, performing gas protection air cooling after sintering is completed, and performing low-temperature tempering at the tempering temperature of 180-200 ℃ for 2-3 hours after air cooling; cycloid inner contourNOuter circle of the substratedLeft end face of outer rotore 1And the right end face of the outer rotore 2The machining allowance is reserved; pair cycloid internal profileNCold extruding with a die, pairing the outer rotor with the inner rotor to grind two end faces, and grinding the excircle of the matrixdAnd finally, finishing by centerless grinding, which comprises the following specific steps:
step X1: with cycloidal inner profileNAnd the left end surface of the outer rotore 1As clamping and positioning reference, the excircle of the base body is finely turneddAnd the right end face of the outer rotore 2With cycloidal inner profileNAnd the right end face of the outer rotore 2Turning the left end face of the outer rotor as a positioning clamping referencee 1Grinding allowance is reserved on each turning surface;
and the excircle of the matrix is finely turneddAnd the right end face of the outer rotore 2The left end surface of the outer rotor is chamfered when turning the head reverselye 1And the outer circle of the base bodydKeeping a right angle; the numerical control machine tool is adopted for processing, and the verticality and the parallelism of the process are less than or equal to 0.015mm and less than or equal to 0.025 mm;
step X2: removing procedure X1) of the outer rotor left end facee 1Right end face of outer rotore 2Respectively with the cycloidal inner profileNFlash and burr are generated at the joint due to turning;
step X3: outer rotor left end facee 1As supporting end faces, with cycloidal inner contoursNCold extrusion processing with a self reference;
meanwhile, the radial clearance value during the assembly of the inner rotor and the outer rotor is required to be 0.08-0.13 mm, and the peripheral manufacturing size of the cold extrusion die is the inner contour of the cycloidNWith the upper limit size of the cycloid inner contourNBy wear of the mould, cycloid internal profileNGradually decrease in size value; and cycloid outer contourWManufacturing cycloidal outer contour by using cold extrusion dieWWith a cycloid outer contour, a lower limit size value ofWBy wear of the mould, cycloid profileWGradually increasing the size value of (a); limited by the fit clearance, the abrasion tolerance value of the two is only 0.05mm, and in view of high price and high manufacturing difficulty of the die material, the matched die can be not scrapped after reaching the use limit, and then the matched die is manufactured respectively and is used continuously; the precision grade of the die per se requires 5 grades, and the assembly verticality requirement is less than or equal to 0.008 mm; the verticality obtained in the working procedure is less than or equal to 0.012mm, and the jumping quantity is less than or equal to 0.015 mm;
step X4: carrying out soft nitriding treatment on the outer rotor subjected to cold extrusion shaping, wherein the depth of a penetrated layer is more than or equal to 0.3mm, and the hardness HR15N (81.3-83.4);
cycloidal inner profile after tufftridingNSlightly increased relative size, but cycloid external contourWThe related size after soft nitriding is also slightly increased, the change directions of the two are consistent, and the change amount is extremely small, so that the radial clearance of the two after soft nitriding can be ensured;
step X5: grinding the two end faces of the paired inner and outer rotors on the basis of each other;
note: the paired inner rotors used in the procedure have completed cycloid outer contourWAnd an internal spline profileSCold extrusion processing and matrix soft nitriding treatment; the axial side clearance requirement of the inner rotor and the outer rotor which are paired and then placed in the containing cavity of the pump shell is 0.04-0.05 mm, the pump bodies which are processed are grouped according to the depth of the containing cavity, the size range of the inner rotor and the outer rotor is calculated according to the grouped size value and the side clearance requirement, and the left end face of the outer rotore 1Right end face of outer rotore 2And the left end surface of the inner rotore 3Right end face of inner rotore 4The two sides of the outer rotor are ground mutually as a reference to ensure the thickness of the outer rotorh 1And inner rotor thicknessh 2Within the size range, the matching grinding ensures the consistency of the thicknesses of the inner rotor and the outer rotor, and the multiple pairs of the grinding are simultaneously grouped according to the grouping size to ensure the consistency of the product precision; in addition, the right end face of the outer rotor is ground before the outer rotor is grounde 2I.e. grinding and grinding the outer circle of the substrate firstdChamfering one side; the parallelism obtained in the process is less than or equal to 0.006 mm;
step X6: centerless grinding of the base excircle
Note: outer circle of outer rotordAnd thicknessh 1The size is large, the centerless grinding is not suitable, in order to adopt the centerless grinding and improve the production efficiency, a corresponding centerless grinding tool is designed, and the outer rotor which is ground by the procedure X5 is axially superposed on the centerless grinding tool;
as shown in fig. 5, the centerless grinding tool has the following geometric elements arranged on the guide cylinder 2: inner contour of cycloidNThe small circle supports the matched excircle, (II) is used for the annular end face limited axially, (III) is usedAn inner hole and an end face which are matched with the tensioning end cover 6 for limiting are provided, and an inner hole which is matched with the fastening end cover 5 for limiting is provided; when the guide cylinder 2 is manufactured, the self and mutual shape and position precision of each geometric element is ensured, the outer circle of the tensioning end cover 6 and the inner hole of the guide cylinder 2 are limited in a short pin mode, and the annular end face of the tensioning end cover 6 is attached to the outer end face of the guide cylinder 2 for limitation; the outer circle of the fastening end cover 5 and the inner hole of the guide cylinder 2 are limited in a short pin mode, meanwhile, the annular end face of the fastening end cover 5 is only attached and limited to the outer end face of the finally superposed outer rotor 1 and is not contacted with the other outer end face of the guide cylinder 2, the pull rod 3 simultaneously penetrates through the fastening end cover 5 and the tensioning end cover 6 and is in clearance fit with the outer end face, an outer hexagonal is arranged on the pull rod 3 positioned at the end of the tensioning end cover 6, the check ring 8 is sleeved on the pull rod 3 and is attached and contacted with the outer hexagonal for limiting, and the spring 7 is sleeved on the pull rod 3 and is positioned between the tensioning; the pull rod 3 positioned at the end of the fastening end cover 5 is provided with an external thread, the fastening nut 4 is rotatably arranged on the pull rod 3 and is used for tensioning the fastening end cover 5 and the tensioning end cover 6, the contact side of the fastening nut 4 and the fastening end cover 5 is provided with a spherical surface, the contact part of the fastening end cover 5 and the fastening nut 4 is provided with an arc, and the spherical surface is in contact with the arc; after tensioning, the spring 7 is in a compressed and tensioned state, and the tensioning force is adjusted by rotating the fastening nut 4 as required; the whole tool is in a flexible fastening state, and can be subjected to self-alignment grinding under the action of the guide wheel during centerless grinding, so that clamping stagnation of hard fastening is avoided;
step X7: removing flash burrs and residual magnetism from the edge of the matrix subjected to centerless grinding in the procedure X6), and classifying and warehousing for later use according to the component sizes after the corrosion prevention treatment;
3.2) inner rotor precision control
According to the inner rotor structure designed in the step 2), the material of the inner rotor component in the step 1) is adopted to press a blank, the inner rotor blank is subjected to liquid phase sintering in an amino atmosphere to obtain all the geometrical elements, the sintering is completed, gas protection air cooling is performed, low-temperature tempering is performed after the air cooling, the tempering temperature is 200-230 ℃, the tempering time is 3-5 hours, and the cycloid outer contour is subjected to cycloidal outer contourWInternal spline profileSLeft end face of inner rotore 3And the right end face of the inner rotore 4The machining allowance is reserved; to cycloid outer contourWAnd an internal spline profileSBy means of composite mouldsCold extrusion, the inner rotor is combined with the outer rotor to be paired and ground two end faces, and the concrete steps are as follows:
step Y1: internal spline profileSCircumferentially and uniformly distributed oil grooves and inner rotor left end surface designed on upper parte 3As clamping positioning reference, the right end face of the inner rotor is finely turnede 4Inner spline profileSCircumferentially and uniformly distributed oil grooves and inner rotor right end face designed on upper parte 4Finish turning left end face of inner rotor as positioning clamping reference reverse heade 3Grinding allowance is reserved on each turning end face; the adopted equipment and the obtained precision requirement are the same as those of the outer rotor;
step Y2: removing process Y1) of the inner rotor left end facee 3And the right end face of the inner rotore 4Respectively corresponding to the cycloid outer contourWInternal spline profileSFlash and burr are generated at the joint due to turning;
step Y3: left end face of inner rotore 3As supporting end faces, with internal spline profileSCold extrusion processing with a self reference; right end face of inner rotore 4And an internal spline profileSAs a supporting and positioning reference, the cycloidal outer contour is processed by cold extrusionW；
Inner rotor cold extrusion processing cycloid outer contourWThe design and manufacture of the die is as described in the outer rotor, and the inner spline profile is processed by cold extrusionSThe relevant size of the die is made into an upper limit size, when the die is worn to exceed the lower deviation, the die can not be scrapped, and only the relevant size requirement of the matched external spline of the driving shaft needs to be changed; the precision grade of the die is required to be 5 grade, the assembly verticality is required to be less than or equal to 0.008mm, and the radial runout of the composite die is less than or equal to 0.015 mm; the jumping quantity obtained in the working procedure is less than or equal to 0.023 mm;
step Y4: carrying out soft nitriding treatment on the outer rotor subjected to cold extrusion shaping, wherein the depth of a penetrated layer is more than or equal to 0.2mm, and the hardness HR15N (75.1-77.4);
step Y5: grinding the paired two end faces of the inner rotor and the outer rotor with reference to each other;
step Y6: and removing flash burrs and residual magnetism of the inner rotor and the outer rotor which are ground in the process Y5), and sorting and warehousing according to the component sizes after the corrosion prevention treatment.
In the present embodiment, it is preferred that,the inner rotor manufacturing process is analyzed by first following the inner spline profileSAs clamping and positioning reference, and the left end surface of the inner rotore 3And the right end face of the inner rotore 4Mutual reference finish turning is carried out, and the profile of the internal spline is ensuredSEnd face reference of relative inner rotorCAnd the verticality of the inner rotor is ensured preliminarilye 4End face reference of relative inner rotorCThe parallelism of (a); second internal spline profileSThe cold extrusion processing is carried out by taking the inner spline as a reference, the error caused by clamping and positioning in other modes is avoided, and the profile of the inner spline after cold extrusion is reduced to the maximum extentSWith cycloidal outer contour not yet cold extrudedWThe run-out amount between, at this time, cold-extruding the inner spline profileSThe mold is in an interference state, and the adopted composite mold is used for cold extruding the cycloid outer contourWSuch a cycloidal outer contourWRelative internal spline datumDThe jumping quantity of the mold is completely dependent on the precision of the mold, and simultaneously, the cycloid outer contour is ensuredWEnd face reference of relative inner rotorCThe perpendicularity of (a); finally, the two end surfaces are ground in a mutual reference manner, the parallelism and the flatness of the two end surfaces are further improved, and the mutual reference grinding improves the form and position tolerance of the front channel on the basis of not changing the form and position tolerance formed in the front; the controllable precision of the inner rotor is as follows: the verticality is less than or equal to 0.016mm, the parallelism is less than or equal to 0.005mm, and the runout is less than or equal to 0.038mm, so that the design precision requirement is met;
the outer rotor manufacturing process is analyzed by firstly using the cycloid inner contourNAs clamping and positioning reference, and the left end surface of the outer rotore 1And the right end face of the outer rotore 2Finish turning on the basis of each other to ensure the inner contour of the cycloidNRelative outer rotor end surface referenceAAnd the right end face of the outer rotor is ensured preliminarilye 2Relative outer rotor end surface referenceAParallelism of, while the base body outer circledRelative inner contour datumBThe jumping amount of the magnetic bearing is ensured; second, with cycloid inner contourNThe self-reference cold extrusion processing is adopted, the error caused by clamping and positioning in other modes is avoided, and the inner contour of the cycloid after cold extrusion is reduced to the maximum extentNWith the base body excircle not yet grounddThe amount of bounce therebetween; furthermore, the two end faces are mutually referenceGrinding, the parallelism of two end surfaces and the flatness of the grinding device are further improved, and the grinding which is mutually based does not change the form and position tolerance formed in the front; finally, adopting centerless grinding to finish the excircle of the base body after turningdOuter circle of base bodydThe grinding amount of the grinding wheel is less than 0.02mm, so the jumping amount caused by the centerless grinding on the basis of the precision of the previous procedure is less than 0.01 mm; influence the outer circle of the substratedRelative inner contour datumBThe factors of the amount of bounce are: the inner contour of cycloidNFine turning of (II) and cycloidal internal profile for positioning referenceNThe self-reference cold extrusion processing of (III), the soft nitriding deformation, (IV) the centerless grinding; the factor I is determined by the self precision of the machine tool, and the soft nitriding deformation is extremely small, so the runout of the whole process can be controlled within 0.051mm of the design requirement; the controllable precision of the outer rotor is as follows: the verticality is less than or equal to 0.018mm, the parallelism is less than or equal to 0.006mm, the runout is less than or equal to 0.035mm, the design precision requirement is met, and the main design requirement detection data of the inner and outer rotor finished products obtained by the process are as follows:
the perpendicularity of the inner rotor No. 1 part is 0.016mm, the runout is 0.025mm, the parallelism is 0.004, and the hardness is HR15N75.1;
the perpendicularity of the inner rotor No. 2 part is 0.015mm, the runout is 0.032mm, the parallelism is 0.004, and the hardness is HR15N75.6;
the perpendicularity of the No. 1 outer rotor part is 0.015mm, the runout is 0.024mm, the parallelism is 0.004, and the hardness is HR15N81.3;
the perpendicularity of the outer rotor No. 2 part is 0.013mm, the runout is 0.023mm, the parallelism is 0.005 and the hardness is HR15N82.2.
In order to reduce the tufftride deformation, the radial size and the axial size of an inner rotor and an outer rotor are larger by reducing the content of molybdenum in an outer rotor material and carrying out tempering treatment, and the inner rotor and the outer rotor are thicker and more symmetrical matrix structures, the tufftride deformation is integrally and uniformly expanded, the original form and position precision is basically maintained after tufftride, and the form and position precision can be further improved by grinding after heat treatment;
the liquid phase sintering can reduce the precision of a sintered part, but the whole manufacturing precision is ensured by subsequent machining, the decarburization reduces the surface hardness, the liquid phase sintering and the tempering, so that the cold extrusion of the subsequent machining is facilitated, the deformation of the soft nitriding is controlled, the molybdenum content in the material is reduced for reducing the deformation of the soft nitriding, the manganese is replaced by the copper, the nickel content is improved for increasing the effect of the soft nitriding, and the surface hardness after the soft nitriding is effectively improved; the soft nitriding temperature is low, the heat treatment process is properly arranged for uniform and symmetrical parts, the deformation is extremely small, the deformation is mainly uniform and swelling, and the form and position tolerance is basically kept at the original precision; finish turning the turning end face of the inner rotor by a numerical control machine tool, wherein the precision grade can be generally controlled at 5-6 grade, the process preliminarily obtains the perpendicularity of the inner profile and the cycloid outer profile of the spline relative to two end faces and the parallelism of the two end faces, the sintering deformation is not temporarily considered, the obtained vertical precision is 0.008-0.015 mm, the parallelism of the two end faces is 0.015-0.025 mm, the next process is composite cold extrusion, the assembly precision of a cold extrusion die is 1-2 grade higher than the precision requirement of a finished product, the verticality requirement of the finished product is 0.02mm and 7 grade precision, the assembly verticality requirement of the die is 5 grade, namely, the verticality is controlled within 0.008mm (the actual assembly precision is generally controlled within 0.005 mm), the verticality is eliminated after the cold extrusion, the deformation during sintering is eliminated, the whole improvement is obtained in the cold extrusion process, the vertical precision is generally controlled within 0.012mm, the jumping momentum of the inner and the outer spline of the inner, considering assembly clearance and abrasion, the requirement on the assembly precision of the die is 5-6 levels of precision, namely the radial runout of the composite die is 0.01-0.015 mm, the actual debugging control is within 0.008mm, the runout of the inner and outer contours after composite cold extrusion is generally within 0.023mm, the subsequent tufftriding treatment has little influence on the radial runout and the verticality, the runout after tufftriding is generally within 0.03mm, the perpendicularity is generally within 0.02mm, the flatness and parallelism of the end face can be further improved by the following matched mutual reference grinding, the perpendicularity can also be improved to a certain extent, the grade precision of grinding can reach T1-T5, the middle T3 grade is selected, the corresponding flatness tolerance is 0.0025mm, the design is adjusted upwards to be 0.003mm, the precision grade is between 3 grades and 4 grades, the parallelism tolerance of 3 grades of precision is 0.005m, the corresponding flatness is adjusted up to 0.006mm, and the whole precision requirement of grinding is relatively economical.
Claims (9)
1. The control method based on the powder metallurgy rotor manufacturing process is characterized by comprising the following specific steps of:
1) outer rotor manufacturing process control
According to the structure and precision requirements of the outer rotor, adopting a modulated outer rotor material to press a blank, and performing liquid phase sintering on the outer rotor blank in an amino atmosphere; then, the cycloid inner contour of the outer rotor is used as a clamping positioning reference, the left end face and the right end face of the outer rotor are used as positioning references to finish-machine the left end face and the right end face, and then the cycloid inner contour is subjected to cold extrusion processing by taking the cycloid inner contour as a reference; finally, grinding the left and right end faces of the inner and outer rotors which are paired in groups in a mutual reference manner, and grinding the excircle of the matrix by adopting centerless grinding;
2) inner rotor manufacturing process control
Adopting a modulated inner rotor material to press a blank according to the structure and precision requirements of the inner rotor, and carrying out liquid phase sintering on the inner rotor blank in an amino atmosphere; then, taking the inner spline profile of the inner rotor or an oil groove circumferentially arranged on the inner spline profile as a clamping and positioning reference, and finely turning the left end surface and the right end surface of the inner rotor as a reference; after finish turning, cold-extruding the inner spline profile by taking the inner spline profile as a reference, keeping the interference state of a die for cold-extruding the inner spline profile and the inner spline profile when the inner spline profile is subjected to cold extrusion, and cold-extruding the cycloid profile by adopting a composite die; and finally, grouping and matching the inner rotor with the outer rotor, and grinding the left end face and the right end face of the inner rotor with the reference of each other.
2. The powder metallurgy rotor manufacturing process-based control method according to claim 1, wherein the modulated inner rotor material comprises the following components in percentage by mass: 0.3-0.5% of C, 0.6-2.0% of Ni, 1.0-3.0% of Cu, and the balance of Fe; the modulated outer rotor material comprises the following components in percentage by mass: 0.25 to 0.5% of C, 0.6 to 1.5% of Ni, 0.2 to 0.4% of Mo, 0.6 to 2% of Cu, and the balance of Fe.
3. The control method based on the powder metallurgy rotor manufacturing process according to claim 1, wherein the structure and precision requirements of the inner rotor are as follows:
the inner rotor structure comprises a cycloid outer contour, an inner spline contour, an inner rotor left end face and an inner rotor right end face; an oil groove is arranged along the circumferential direction of the profile of the inner spline, the left end face of the inner rotor is designed to be the reference of the end face of the inner rotor, the profile of the inner spline is designed to be the reference of the inner spline, and the maximum size of the periphery of the inner rotor<80mm, thickness<50 mm; the design precision of the jumping quantity of the cycloid outer contour relative to the inner spline reference is less than or equal to 0.064mm, and the design precision of the verticality of the cycloid outer contour relative to the inner rotor end surface reference is less than or equal to 0.02 mm; the design precision of the parallelism of the right end face of the inner rotor relative to the reference of the end face of the inner rotor is less than or equal to 0.006mm, and the design precision of the perpendicularity of the contour of the inner spline relative to the reference of the end face of the inner rotor is less than or equal to 0.02 mm; the self flatness design precision of the left end surface of the inner rotor and the right end surface of the inner rotor is less than or equal to 0.003mm, and the surface roughness design precision isR a0.8, the design precision of the surface roughness of the cycloid outer contour isR a0.8, the surface roughness design accuracy of the internal spline profile isR a1.6；
The structure and the precision requirement of the inner rotor are obtained through the control mode in the step 2).
4. The powder metallurgy rotor manufacturing process-based control method according to claim 1, wherein the structure and precision requirements of the outer rotor are as follows:
the outer rotor structure comprises an inner cycloid contour, a base body excircle, an outer rotor left end face and an outer rotor right end face, the outer rotor left end face is designed to be an outer rotor end face datum, the inner cycloid contour is designed to be an inner contour datum, and the diameter of the base body excircle<100mm and thickness<50 mm; the design precision of the jumping quantity of the outer circle of the matrix relative to the reference of the inner contour of the cycloid is less than or equal to 0.051mm, and the design precision of the verticality of the outer circle of the matrix relative to the reference of the end surface of the outer rotor is less than or equal to 0.02 mm; the parallelism design precision of the right end face of the outer rotor relative to the end face reference of the outer rotor is less than or equal to 0.006mm, and the cycloid curveThe verticality design precision of the inner contour relative to the end surface reference of the outer rotor is less than or equal to 0.02 mm; the self-flatness design precision of the left end surface and the right end surface of the outer rotor is less than or equal to 0.003mm, and the surface roughness design precision isR a0.8, the design accuracy of the surface roughness of the inner contour of the cycloid and the outer circle of the matrix is bothR a0.8；
The structure and the precision requirement of the outer rotor are obtained by the control mode in the step 1).
5. The control method based on the powder metallurgy rotor manufacturing process according to claim 1, wherein in the step 1), the joint of the outer circle of the base body and the right end face of the outer rotor is chamfered, the left end face of the outer rotor and the outer circle of the base body keep right angles, and grinding allowances are left when the left and right end faces of the outer rotor and the outer circle of the base body are turned; and in the step 2), grinding allowances are reserved on the left end face and the right end face of the turned inner rotor.
6. The control method based on the powder metallurgy rotor manufacturing process according to claim 1 or 4, wherein in the step 1), the outer circle, the left end face and the right end face of the outer rotor matrix are turned by adopting a numerical control machine for finish turning, and the perpendicularity of the left end face and the right end face of the outer rotor relative to the cycloidal inner profile datum is preliminarily obtained to be less than or equal to 0.015mm, and the parallelism of the right end face of the outer rotor relative to the end face datum of the outer rotor is less than or equal to; the assembly precision grade of the cold extrusion cycloid inner contour die is not lower than 5 grade, the perpendicularity of the cycloid inner contour obtained after cold extrusion relative to the outer rotor end surface reference is less than or equal to 0.012mm, and the jumping quantity of the cycloid inner contour relative to the outer circle of the turned matrix is less than or equal to 0.015 mm; the flatness of the left end surface and the right end surface of the outer rotor obtained after the left end surface and the right end surface of the inner rotor are ground is less than or equal to 0.0025mm, and the parallelism of the right end surface of the outer rotor relative to the reference of the end surface of the outer rotor is less than or equal to 0.005 mm; the centerless grinding amount of the excircle of the matrix is less than 0.02mm, and the jumping amount of the cycloid inner profile relative to the excircle of the matrix after turning is less than or equal to 0.025 mm.
7. The control method based on the powder metallurgy rotor manufacturing process according to claim 1 or 3, wherein in the step 2), the turning of the left and right end faces of the inner rotor is finished by a numerical control machine, the assembly precision grade of the composite cold extrusion die is not lower than 5 grade, and the jumping quantity of the cycloid outer contour obtained after the composite cold extrusion relative to the internal spline reference is not more than 0.023 mm; the flatness of the left end face and the right end face of the inner rotor is less than or equal to 0.0025mm after the left end face and the right end face of the inner rotor are ground, and the parallelism of the right end face of the inner rotor relative to the reference of the end face of the inner rotor is less than or equal to 0.005 mm; finally, the verticality of the left end face and the right end face relative to the internal spline reference is less than or equal to 0.016mm, and the design precision of the jumping quantity of the cycloid outer contour relative to the internal spline reference is less than or equal to 0.038 mm.
8. The control method based on the powder metallurgy rotor manufacturing process according to claim 1, wherein in the step 1) and the step 2), the specific way of grouping and pairing is that firstly, the axial backlash requirement of the finished products of the inner and outer rotors which are placed into the cavity of the pump shell is determined, secondly, the pump bodies which are processed are grouped according to the depth of the cavity, the processing range of the axial size of the inner and outer rotors is calculated according to the value of the grouping size and the backlash requirement, thirdly, the inner and outer rotors are selected according to the processing range of the axial size to be paired with the corresponding pump bodies, and finally, the left end surface of the outer rotor, the right end surface of the outer rotor, the left end surface of the inner rotor and the right end surface of the inner rotor which are selected and paired are ground in a way that the two surfaces of the left end surface; in addition, the outer rotor grinds the right end face of the outer rotor before grinding.
9. The control method based on the powder metallurgy rotor manufacturing process according to claim 1, wherein in the step 1), the outer rotor completing the end face grinding is axially superposed on the centerless grinding tool for centerless grinding by adopting a specific mode of centerless grinding the outer circle of the base body, the centerless grinding tool comprises a guide cylinder, a pull rod, a fastening end cover, a tensioning end cover, a spring and a fastener for tensioning the fastening end cover and the tensioning end cover, the outer rotor is axially superposed on the guide cylinder, the guide cylinder is provided with an outer circle for supporting and matching with a small circle of the inner contour of the cycloid, an annular end face for axial limiting, an inner hole and an end face for matching and limiting with the tensioning end cover and an inner hole for matching and limiting with the fastening end cover; a tensioning end cover is arranged at one end of the guide cylinder, a fastening end cover is arranged at the other end of the guide cylinder, the pull rod simultaneously penetrates through the fastening end cover and the tensioning end cover and is in clearance fit with the fastening end cover and the tensioning end cover, an outer hexagonal is arranged on the pull rod positioned at the end of the tensioning end cover, the retainer ring is sleeved on the pull rod and is in fit contact with the outer hexagonal for limiting, and the spring is sleeved on the pull rod and is positioned between the tensioning end cover and the retainer ring; the pull rod positioned at the fastening end cover end is provided with external threads, and the fastening piece is rotatably arranged on the pull rod and used for tensioning the fastening end cover and the fastening end cover; and a spherical surface is arranged on the contact side of the fastening piece and the fastening end cover, an arc is arranged at the contact part of the fastening end cover and the fastening piece, and the spherical surface is contacted with the arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010909990.6A CN112059188A (en) | 2020-09-02 | 2020-09-02 | Control method based on powder metallurgy rotor manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010909990.6A CN112059188A (en) | 2020-09-02 | 2020-09-02 | Control method based on powder metallurgy rotor manufacturing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112059188A true CN112059188A (en) | 2020-12-11 |
Family
ID=73665382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010909990.6A Pending CN112059188A (en) | 2020-09-02 | 2020-09-02 | Control method based on powder metallurgy rotor manufacturing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112059188A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5368629A (en) * | 1991-04-03 | 1994-11-29 | Sumitomo Electric Industries, Ltd. | Rotor for oil pump made of aluminum alloy and method of manufacturing the same |
| US20030165392A1 (en) * | 2002-03-01 | 2003-09-04 | Mitsubishi Materials Corporation | Oil pump rotor |
| CN102922243A (en) * | 2012-12-04 | 2013-02-13 | 怀特(中国)驱动产品有限公司 | Integral stator processing method |
| CN103192071A (en) * | 2013-04-23 | 2013-07-10 | 南京浩德粉末冶金有限公司 | Powder metallurgical formulas for internal and external rotors of hydraulic slippage pump and manufacturing method of internal and external rotors of hydraulic slippage pump |
| CN203266295U (en) * | 2013-04-23 | 2013-11-06 | 南京浩德粉末冶金有限公司 | Novel cycloid rotor external grinding tool |
| CN204673341U (en) * | 2015-06-11 | 2015-09-30 | 苏州大学 | Not rounded Internal periphery many curved surfaces quick centring fixture |
-
2020
- 2020-09-02 CN CN202010909990.6A patent/CN112059188A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5368629A (en) * | 1991-04-03 | 1994-11-29 | Sumitomo Electric Industries, Ltd. | Rotor for oil pump made of aluminum alloy and method of manufacturing the same |
| US20030165392A1 (en) * | 2002-03-01 | 2003-09-04 | Mitsubishi Materials Corporation | Oil pump rotor |
| CN102922243A (en) * | 2012-12-04 | 2013-02-13 | 怀特(中国)驱动产品有限公司 | Integral stator processing method |
| CN103192071A (en) * | 2013-04-23 | 2013-07-10 | 南京浩德粉末冶金有限公司 | Powder metallurgical formulas for internal and external rotors of hydraulic slippage pump and manufacturing method of internal and external rotors of hydraulic slippage pump |
| CN203266295U (en) * | 2013-04-23 | 2013-11-06 | 南京浩德粉末冶金有限公司 | Novel cycloid rotor external grinding tool |
| CN204673341U (en) * | 2015-06-11 | 2015-09-30 | 苏州大学 | Not rounded Internal periphery many curved surfaces quick centring fixture |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7000444B2 (en) | Forging method and apparatus | |
| CN205497136U (en) | Grinding device | |
| CN101176903B (en) | Processing method of enlarging cold-rolling of inside and outside spherical surface ferrule piece as well as device thereof | |
| CN101235847B (en) | Straight-line rolling slipper block and method of manufacture | |
| CN102489960B (en) | Method for manufacturing harmonic reducer of robot | |
| US7862404B2 (en) | Micro-concave portion machining method | |
| US9358605B2 (en) | Method and production line for machining a crankshaft | |
| CN108161377B (en) | A kind of superfine processing method of Cycloidal Wheel | |
| CN111015107A (en) | Hydraulic cylinder body and cylinder sleeve boring and rolling combined machining method | |
| KR101371578B1 (en) | Dimple-forming burnishing tool | |
| CN101784397B (en) | Method of producing raceway ring member for rolling bearing unit | |
| CN109483414B (en) | Environment-friendly double-end-face grinding disc for machining piston ring and preparation method and application thereof | |
| CN102586556B (en) | Surface strengthening treatment device for actively and rotatablely rolling and planishing head of roll compactor | |
| CN112059188A (en) | Control method based on powder metallurgy rotor manufacturing process | |
| CN110014272A (en) | A kind of processing method and assembly method of pairs of eccentric shaft | |
| CN202656047U (en) | Device for grinding eccentric sleeve of main shaft of disk shear | |
| CN109333329B (en) | Servo double-feed machining method and structure of honing machine | |
| CN112059190A (en) | Manufacturing method of oil replenishing pump rotor based on powder metallurgy | |
| CN114535940B (en) | Processing method of short cylindrical roller bearing retainer with positioning flange on outer ring | |
| JP6475416B2 (en) | Piston ring and manufacturing method thereof | |
| TWI463079B (en) | Blank for a ring member of a bearing, menufacturing method for the same, manufacturing method for a ring member of a bearing, and bearing | |
| CN101780627A (en) | Manufacturing method of valve rod of high temperature and high pressure cut-off valve | |
| CN105522224A (en) | Collet-type guiding device for peeling of rods, wires and tubes | |
| CN114193094A (en) | Machining process of ultrahigh precision main shaft | |
| CN111033037B (en) | Manufacturing method, plunger blank, plunger and axial plunger type machine with plunger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201211 |