CN103317311A - Machining method of floating cylinder - Google Patents
Machining method of floating cylinder Download PDFInfo
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- CN103317311A CN103317311A CN2013102820710A CN201310282071A CN103317311A CN 103317311 A CN103317311 A CN 103317311A CN 2013102820710 A CN2013102820710 A CN 2013102820710A CN 201310282071 A CN201310282071 A CN 201310282071A CN 103317311 A CN103317311 A CN 103317311A
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Abstract
The invention provides a machining method of a floating cylinder. The method includes the steps of roughing an upper half and a lower half of a work piece; integrating the upper half of the work piece and the lower half of the work piece, and subjecting external and inner peripheries of the work piece to allowance rough turning; demounting and sequentially finish-milling a split between the upper half and the lower half; bolting and subjecting external and internal peripheries of a work piece journal to allowance semi-finish-turning; reaming connecting holes, an oil inlet and an oil outlet; milling a fine thread on the oil inlet, an oil way of the upper half of the work piece and connecting holes in an end flange; demounting and sequentially finish-milling the upper half and the lower half; bolting and finish-turning the outer periphery of the work piece; demounting, cleaning the surface and checking surface quality of the external and internal peripheries of the work piece; bolting and oiling before storage. The method has the advantages that application requirements are met, machining quality is well guaranteed, the problems possibly existing in production of new products are solved, the size tolerance and external beating can be ensured to meet the technical requirements, and a reasonable complete process scheme for machining of subsequent products is provided.
Description
Technical field
The present invention relates to field of machining and machinebuilding technology, specifically is a kind of processing method of the tripping sleeve for the turbine testing stand.
Background technology
As shown in Figure 1 be tripping sleeve for the turbine testing stand.During assembling, a rotating shaft is equipped with in tripping sleeve inside and tripping sleeve is arranged on bearing housing inside.Design left axle journal 2 and right axle journal 6 about tripping sleeve respectively, all be equipped with dynamic bearing and blind axle on the endoporus of left axle journal 2 and right axle journal 6 and the cylindrical.The blind axle in its left axle journal 2 or right axle journal 6 outsides is supported on the bearing housing, and the dynamic bearing of left axle journal 2 and right axle journal 6 inboards is enclosed within the rotating shaft.Tripping sleeve in use, the outboard bearing casing maintains static, inner rotating shaft is being rotated, tripping sleeve itself then has very low-angle swing.
Tripping sleeve is half hitch structure up and down, and half point is not used steel plate or the forging welding fabrication of several sections different-diameters up and down, the discontinuous flange of split outside welding, is referred to as split flange 5, and perforate on the split flange 5 is gone up second with Bolt Connection tight.The appearance and size of tripping sleeve is bigger, the about φ 700～1000mm of maximum cylindrical, the about 2000～2500mm of axial length, minimum endoporus φ 280～350mm.Tripping sleeve is the weldment supplied materials, and wall is thin, and the thinnest local wall thickness only is 20～30mm, and the endoporus of tripping sleeve, cylindrical are arranged many grades of annular grooves, and end face is provided with end face seam 7.First of tripping sleeve has fuel feed hole 1 and oil pocket, and second has draining hole, many places.
And there is following difficulty in the processing of this tripping sleeve:
At first, weldment supplied materials, and thin-walled, deflection is bigger; Secondly, the split gap requires high, requires tight state 0.02mm clearance gauge is not gone into; Again, the processing dimension tolerance of tripping sleeve and Geometrical Tolerance Principle height, concrete: the tolerance of two axle journals is φ (0,-0.03mm), Geometrical Tolerance Principle is total run-out 0.015mm, cylindricity is 0.015mm, and the axle journal cylindrical adopts the rotor requirement on machining accuracy fully, and endoporus has also adopted identical requirement.At last, because of Workpiece length and reasons in structure, the clamping difficulty is big when milling split and turning.
Summary of the invention
The objective of the invention is to: a kind of tripping sleeve processing method is provided, has filled up the processing blank of China for these type of complex parts.
The technical solution adopted in the present invention is:
A kind of tripping sleeve processing method, described tripping sleeve is the cover tubular, the two ends design has axle journal and end face flange, tripping sleeve is half hitch structure up and down, the discontinuous flange of split outside welding, have connecting hole on end face flange and the split flange, the last half-sum of tripping sleeve second use Bolt Connection tight, and first of tripping sleeve is provided with fuel feed hole and oil pocket, and second is provided with the draining hole; Described tripping sleeve processing method may further comprise the steps:
(1) with the last half-sum of workpiece to be processed second successively clamping carry out roughing at lathe, be specially: rough mill half-sum workpiece on the workpiece second split and the connecting hole on first split flange of preboring workpiece, pre-miller part rushes down oilhole on second;
(2) second is integrated with half-sum workpiece on the workpiece, and is rough turn to excircle of workpiece and interior round allowance, the two ends axle journal of first piece;
(3) workpiece is taken apart into half-sum workpiece on the workpiece second, second split of half-sum workpiece on the finish-milling workpiece successively;
(4) second is integrated with half-sum workpiece on the workpiece, to cylindrical and interior round allowance half finish turning of workpiece axle journal;
(5) according to connecting hole corresponding on the connecting hole position on first split flange of workpiece, second split flange of workpiece that drills and reams, first creeps into oilhole at workpiece, second mills and rushes down oilhole at workpiece, and to the connecting hole tapping on second split flange of workpiece;
(6) with clamping workpiece on boring machine, the fine thread on the milling fuel feed hole, workpiece first oil groove and the connecting hole on the end face flange;
(7) workpiece is taken apart into half-sum workpiece on the workpiece second, on the finish-milling workpiece half-sum workpiece second;
(8) second is integrated with half-sum workpiece on the workpiece, the finish turning excircle of workpiece;
(9) workpiece is taken apart into half-sum workpiece on the workpiece second, cleaning surface also checks the surface quality of excircle of workpiece and interior circle;
(10) second is integrated with half-sum workpiece on the workpiece, the oiling warehouse-in.
In the described step (1), use frock with workpiece first or second clamping of workpiece on platen, this frock comprises the V-arrangement back-up block, 2 groups of hold down gags and several jack, described V-arrangement back-up block upper surface is V-shaped, put off second cylindrical of workpiece first or workpiece, both sides, V-arrangement back-up block top are provided with platform, second split outer flange of corresponding workpiece first or workpiece, jack evenly is arranged between split outer flange and the platform, hold down gag comprises horizontal pressing plate and pressing plate, horizontal pressing plate withstands second interior circle of workpiece first or workpiece, transverse horizontal arranges, pressing plate is perpendicular to horizontal pressing plate setting, and an end compresses horizontal pressing plate upper surface, the other end is fixedlyed connected with platen.
In the described step (2), adopt boring machine to see light workpiece two ends end face of flange, bore the end face seam at thinner end face of flange, by end face seam location, on this end face of flange a unification end face closure plate, follow-up turning adds man-hour, adopts the thicker end face of flange of claw holding workpiece, and tailstock centre withstands on clamping on the closure plate centre bore.
In the described step (3), use frock with workpiece first or second clamping of workpiece on platen, this frock comprises the semicircle back-up block, 2 groups of hold down gags and several jack, described semicircle back-up block upper surface is the semicircle camber of indent, second cylindrical of workpiece first or workpiece puts off and fits, both sides, semicircle back-up block top are provided with platform, second split outer flange of corresponding workpiece first or workpiece, jack evenly is arranged between split outer flange and the platform, hold down gag comprises horizontal pressing plate and pressing plate, horizontal pressing plate withstands second interior circle of workpiece first or workpiece, transverse horizontal arranges, pressing plate is perpendicular to horizontal pressing plate setting, and an end compresses horizontal pressing plate upper surface, the other end is fixedlyed connected with platen.
Between described step (1) and (2), use second welding position of half-sum workpiece on the magnetic powder inspection workpiece.
In the described step (7), finish-milling comprises: first second fluting and draining hole of split fluting, finish-milling workpiece of finish-milling workpiece.
The quality that checks circle in the workpiece in the described step (9) is used endoscopy.
The beneficial effect that the present invention produces is:
1) the inventive method can satisfy instructions for use, has guaranteed crudy preferably, solved the problem that may exist in the new product production, and for the processing of product determined one more rationally, more perfect process program.
2) the clamping frock of design specialized guarantees effective clamping, guarantees the requirement of split gap;
3) determine turning installation way and determine that rational cutting parameter guarantees that dimensional tolerance and cylindrical are beated and satisfy specification requirement.
4) control the distortion of thin-wall part well, for subsequent production is accumulated experience.
Description of drawings
Fig. 1 is the structural representation of tripping sleeve.
Fig. 2 is the work flow schematic diagram of tripping sleeve;
Fig. 3 is the clamping structural representation of tripping sleeve in milling process.
Number in the figure is represented: 1-fuel feed hole, 2-left side axle journal, 3-draining hole, 4-connecting hole, 5-split flange, the right axle journal of 6-, 7-end face seam, 8-pressing plate, the horizontal pressing plate of 9-, 10-workpiece first or workpiece second, 11-jack, 12-V shape back-up block.
The specific embodiment
Shown in Fig. 1～3, tripping sleeve to be processed is the cover tubular, the two ends design has axle journal and end face flange, tripping sleeve is half hitch structure up and down, the discontinuous flange of split outside welding, have connecting hole 4 on end face flange and the split flange 5, the last half-sum of tripping sleeve second use Bolt Connection tight, and first of tripping sleeve is provided with fuel feed hole 1 and oil pocket, and second is provided with draining hole 3.
The present invention is the processing method of above-mentioned tripping sleeve, may further comprise the steps:
(1) with the last half-sum of workpiece to be processed second successively clamping carry out roughing at lathe, be specially: rough mill half-sum workpiece on the workpiece second split and the connecting hole 4 on first split flange 5 of preboring workpiece, pre-miller part rushes down oilhole on second;
Wherein: use frock with workpiece first or second 10 clamping of workpiece on platen, this frock comprises V-arrangement back-up block 12,2 groups of hold down gags and several jack 11, described V-arrangement back-up block 12 upper surfaces are V-shaped, put off workpiece first or second cylindrical of 10 of workpiece, both sides, V-arrangement back-up block 12 top are provided with platform, corresponding workpiece first or second split outer flange of 10 of workpiece, jack 11 evenly is arranged between split outer flange and the platform, hold down gag comprises horizontal pressing plate 9 and pressing plate 8, horizontal pressing plate 9 withstands workpiece first or second interior circle of 10 of workpiece, transverse horizontal arranges, pressing plate 8 arranges perpendicular to horizontal pressing plate 9, and an end compresses horizontal pressing plate 9 upper surfaces, the other end is fixedlyed connected with platen.
Concrete:
(i) after line is finished, just begin successively second split of half-sum workpiece on the workpiece is rough milled.Measure more for a long time the front, and the initial cutting-in parameter that adds man-hour is given lessly, gradually reduced subsequently again, improves the roughness on surface, and after milling was finished, the range estimation roughness can guarantee can satisfy instructions for use substantially below Ra3.2.
In the same way, second split of sleeve has also been finished milling, the split data of beating satisfy the drawing requirement after the milling.
Afterwards, use second welding position of half-sum workpiece on the magnetic particle testing workpiece.
The connecting hole 4(that (ii) bores on the split flange 5 connects screw):
Brill connects the operation of screw and mills the split intersection and carry out, and concrete: the drilling of the connecting hole 4 on first split flange 5 of workpiece is carried out after first split mills well.With the connecting hole 4 on first split flange 5 machine the back, again with workpiece on first drilling machine carried out shaving.Connecting hole 4 on second split flange 5 of workpiece, be on workpiece the half-sum workpiece second to after its centering, draw the position of the connecting hole 4 on second split flange 5 according to connecting hole 4 positions on first split flange 5.Mill according to the hole tool setting on each section size marking datum line starting point at gantry then, checks scribing position, confirms the connecting hole 4 on second split flange 5 to be machined after errorless again.
Because the connecting hole 4 on second split flange 5 is screw, therefore, tapping has been carried out in pincers worker after this.
Go up after second connecting hole 4 all machines, tight bolt, check clearance gauge 0.02mm under the tight state is not gone into smoothly.Before screwde on, for operation is rough turn down the centering part can be arranged, therefore go up face plate place's contour point has been beaten at axle journal cylindrical place, upper and lower half two ends respectively.
(2) second is integrated with half-sum workpiece on the workpiece, and is rough turn to excircle of workpiece and interior round allowance, the two ends axle journal of first piece;
Wherein: adopt boring machine to see light workpiece two ends end face of flange, bore end face seam 7 at thinner end face of flange, by end face seam 7 location, on this end face of flange a unification end face closure plate, follow-up turning adds man-hour, adopts the thicker end face of flange of claw holding workpiece, and tailstock centre withstands on clamping on the closure plate centre bore.
After clamping is finished, it is the centering problem.Because plug centre bore and seam are that a cutter processes, therefore can think sleeve lean on the tailstock end be positioned in the heart, only need the cylindrical of centering claw one side to get final product.Because there are contour point two places at the axle journal place, therefore can centering cross rotating shaft and perpendicular to the direction of split, but the split direction there is not the centering band, can only adopt the method for symmetric points centering.
After the centering, just begin rough turn cylindrical.
After cylindrical is rough turn, then begin the processing of endoporus.First being processed, earlier with the part centering, centering need utilize centre frame that it is adjusted.Because part is bigger, so the centre frame adjustment is very inconvenient, regulate height, the front and back position of its roller, after probably having adjusted, must finely tune by observing beating situation about beating when showing, with its centering in 0.02mm.
In addition, because the endoporus working depth is darker, and endoporus is difficult for observing its state man-hour adding, and the monolateral 2mm finish turning surplus of staying is during inspection, beat is in 0.02mm.
(3) workpiece is taken apart into half-sum workpiece on the workpiece second, second split of half-sum workpiece on the finish-milling workpiece successively;
Wherein: use frock with workpiece first or second clamping of workpiece on platen, this frock comprises the semicircle back-up block, 2 groups of hold down gags and several jack 11, described semicircle back-up block upper surface is the semicircle camber of indent, second cylindrical of workpiece first or workpiece puts off and fits, semicircle supports both sides, shape piece top and is provided with platform, second split outer flange of corresponding workpiece first or workpiece, jack 11 evenly is arranged between split outer flange and the platform, hold down gag comprises horizontal pressing plate 9 and pressing plate 8, horizontal pressing plate 9 withstands second interior circle of workpiece first or workpiece, transverse horizontal arranges, pressing plate 8 arranges perpendicular to horizontal pressing plate 9, and an end compresses horizontal pressing plate 9 upper surfaces, the other end is fixedlyed connected with platen.
(4) second is integrated with half-sum workpiece on the workpiece, to cylindrical and interior round allowance half finish turning of workpiece axle journal;
See the finish turning that has just begun interior circle after the light cylindrical, situation about analyzing when making scheme, the finish turning of interior circle is the place of difficulty maximum, its process has taked the mode of segmentation programming, segmental machining to carry out.After interior circle machined, upper baffle carried out turning to foreign round.
(5) according to connecting hole 4 corresponding on connecting hole 4 positions on first split flange 5 of workpiece, second split flange 5 of workpiece that drills and reams, first creeps into oilhole 1, rushes down oilhole at second brill of workpiece at workpiece, and to connecting hole 4 tappings on second split flange 5 of workpiece.
(6) with clamping workpiece on boring machine, the fine thread on the milling fuel feed hole, workpiece first oil groove and the connecting hole on the end face flange; The fine thread on the Milling Process fuel feed hole at first, first oil groove of Milling Process workpiece is then processed second the connecting hole of end face flange of half-sum workpiece on the workpiece at last and heavy face has been carried out counter scraping.
(7) workpiece is taken apart into half-sum workpiece on the workpiece second, on the finish-milling workpiece half-sum workpiece second;
Finish-milling is mainly processed the fluting on some endoporus, the split etc., comprising: first second fluting and draining hole 3 of split fluting, finish-milling workpiece of finish-milling workpiece.At first processing be workpiece second, adjust jack 11 and cooperate the mode of dial gauge beat values to carry out centering, use right-angle milling head processing fluting and screw bottom outlet.Because draining hole 3 is " fall T " shape, taked to have scurried earlier the mode of size, preboring through hole, scurry cylindrical side size surplus after standing up by measuring draining hole 3 and the distance of location benchmark.First split fluting of processing work then.
(8) second is integrated with half-sum workpiece on the workpiece, clamping on lathe to the excircle of workpiece finish turning; Be last procedure of processing, only to requiring the highest cylindrical to carry out turning.
(9) workpiece is taken apart into half-sum workpiece on the workpiece second, cleaning surface also checks the surface quality of excircle of workpiece and interior circle; Wherein: the quality that checks circle in the workpiece is used endoscopy.
(10) second is integrated with half-sum workpiece on the workpiece, the oiling warehouse-in.
Below the turning in the process and two master operations of milling are analyzed:
A. turning: comprise rough turn, half finish turning of step (4) of step (2) and the finish turning of step (8).
Processing difficulties: each of this tripping sleeve grade endoporus, cylindrical are black skin, in the turning process all there are big difficulty in the control of its clamping, deflection and the assurance of roughness.
Innovative point is:
A. for making things convenient for the turning clamping, adopt boring machine to see that light is the two ends end face flange of the workpiece after closing, bore the strict control of size of end face seam 7(end face seam 7 simultaneously at the thinner end face flange of workpiece), and the connecting hole on the pre-drill end flange, by end face seam 7 location, that the closure plate handle is tight on the thinner end face flange of workpiece like this;
Turning adds man-hour, and the claw clamping of adopting lathe is on the thicker end face flange of the workpiece after closing, and tailstock centre withstands on the closure plate centre bore, when having solved turning well, to the clamping problem of workpiece.
B. because the end face flange of dress closure plate side is thinner, and clamping very easily is out of shape, the present invention increases closure plate, has promoted the rigidity of this end face flange at this, has reduced workpiece deformation;
C. in turning, the cooperation adjustment of cutting parameter, lathe rotating speed, feed scheme and tailstock pressure.
D. closure plate frock design, make: with being to guarantee positioning accuracy, the end face seam 7 on the thinner end face flange of workpiece and the matching design of closure plate are taper fit.The tapering size is according to the strict control of end face seam 7 sizes of tripping sleeve, simultaneously, and according to the connecting hole of preboring on the tripping sleeve end face flange, correspondence gets out connecting hole on closure plate.Concentric in order to guarantee closure plate centre bore and tripping sleeve technology seam, require under a clamping state, to finish the closure plate conical surface and centre bore processing.
B. milling: the finish-milling and the step (6) that comprise the rough milling of step (1), step (3).
Difficult point: second is semi-circular structure the last half-sum of this tripping sleeve, and contour structures is complicated, wall thickness, and axial length is longer, and integral rigidity is poor, and milling process clamping difficulty is very big.
Innovative point is:
A. rough mill split and adopt special-purpose V-arrangement back-up block 12 to support, the two ends axle journal is the main support point, the middle multiple spot supplemental support point that adopts.Put in workpiece split outer flange and both sides, V-arrangement back-up block 12 top platform, can all use adjustable for height jack 11 to support, also can a side use jack 11 adjustable supports with contour pad ferropexy support, opposite side.So design can come centering by the height of adjusting jack 11.
Because, this tripping sleeve split all needs milling, pressing plate 8 is not suitable for riding over split, Given this, set up horizontal pressing plate 9 at sleeve two ends inner circle, re-use pressing plate 8 and vertically be erected on the horizontal pressing plate 9, so design makes stressed more reasonable, power be decomposed two places, and milling process is more stable, not yielding.Jack 11 supplemental support are used in many places, two side flange lower surfaces, can avoid workpiece to tremble, reduce the deflection of tripping sleeve in the milling process.This installation way can guarantee that the disposable milling of whole split finishes.
When finish-milling, designed special-purpose semi-circular back-up block, replacement V-arrangement back-up block 12 in addition, other remain unchanged as pressing plate 8, horizontal pressing plate 9 and jack 11 etc.Wherein semi-circular back-up block is that upper surface with V-arrangement back-up block 12 has changed recessed semicircle into by the inclined-plane, and this diameter of a circle cooperates according to sleeve cylindrical actual measurement size+0.02mm and processes.
B. in the milling process cutting parameter, tool path pattern rationally select the real-time adjustment of thrust for use.
C. result of use: the part that uses above-mentioned processing method to process, it is qualified fully to check.Wherein, after finish turning was finished, all sizes all satisfied the drawing requirement, and two ends axle journal jitter values is respectively 0.015mm and 0.005mm; After the finish-milling split was finished, the split maximum difference of beating was 0.02mm; After tight, split gap 0.02mm clearance gauge is not gone into, and has reached Design Requirement Drawing fully at the dress pin.
Claims (7)
1. tripping sleeve processing method, described tripping sleeve is the cover tubular, the two ends design has axle journal and end face flange, tripping sleeve is half hitch structure up and down, the discontinuous flange of split outside welding, have connecting hole on end face flange and the split flange, the last half-sum of tripping sleeve second use Bolt Connection tight, and first of tripping sleeve is provided with fuel feed hole and oil pocket, and second is provided with the draining hole; It is characterized in that described tripping sleeve processing method may further comprise the steps:
(1) with the last half-sum of workpiece to be processed second successively clamping carry out roughing at lathe, be specially: rough mill half-sum workpiece on the workpiece second split and the connecting hole on first split flange of preboring workpiece, pre-miller part rushes down oilhole on second;
(2) second is integrated with half-sum workpiece on the workpiece, and is rough turn to excircle of workpiece and interior round allowance, the two ends axle journal of first piece;
(3) workpiece is taken apart into half-sum workpiece on the workpiece second, second split of half-sum workpiece on the finish-milling workpiece successively;
(4) second is integrated with half-sum workpiece on the workpiece, to cylindrical and interior round allowance half finish turning of workpiece axle journal;
(5) according to connecting hole corresponding on the connecting hole position on first split flange of workpiece, second split flange of workpiece that drills and reams, first creeps into oilhole at workpiece, second mills and rushes down oilhole at workpiece, and to the connecting hole tapping on second split flange of workpiece;
(6) with clamping workpiece on boring machine, the fine thread on the milling fuel feed hole, workpiece first oil groove and the connecting hole on the end face flange;
(7) workpiece is taken apart into half-sum workpiece on the workpiece second, on the finish-milling workpiece half-sum workpiece second;
(8) second is integrated with half-sum workpiece on the workpiece, the finish turning excircle of workpiece;
(9) workpiece is taken apart into half-sum workpiece on the workpiece second, cleaning surface also checks the surface quality of excircle of workpiece and interior circle;
(10) second is integrated with half-sum workpiece on the workpiece, the oiling warehouse-in.
2. tripping sleeve processing method according to claim 1, it is characterized in that, in the described step (1), use frock with workpiece first or second clamping of workpiece on platen, this frock comprises the V-arrangement back-up block, 2 groups of hold down gags and several jack, described V-arrangement back-up block upper surface is V-shaped, put off second cylindrical of workpiece first or workpiece, both sides, V-arrangement back-up block top are provided with platform, second split outer flange of corresponding workpiece first or workpiece, jack evenly is arranged between split outer flange and the platform, hold down gag comprises horizontal pressing plate and pressing plate, horizontal pressing plate withstands second interior circle of workpiece first or workpiece, transverse horizontal arranges, pressing plate is perpendicular to horizontal pressing plate setting, and an end compresses horizontal pressing plate upper surface, the other end is fixedlyed connected with platen.
3. tripping sleeve processing method according to claim 1, it is characterized in that, in the described step (2), adopt boring machine to see light workpiece two ends end face of flange, bore the end face seam at thinner end face of flange, by end face seam location, on this end face of flange a unification end face closure plate, follow-up turning adds man-hour, adopts the thicker end face of flange of claw holding workpiece, tailstock centre withstands on clamping on the closure plate centre bore.
4. tripping sleeve processing method according to claim 1, it is characterized in that, in the described step (3), use frock with workpiece first or second clamping of workpiece on platen, this frock comprises the semicircle back-up block, 2 groups of hold down gags and several jack, described semicircle back-up block upper surface is the semicircle camber of indent, second cylindrical of workpiece first or workpiece puts off and fits, both sides, semicircle back-up block top are provided with platform, second split outer flange of corresponding workpiece first or workpiece, jack evenly is arranged between split outer flange and the platform, hold down gag comprises horizontal pressing plate and pressing plate, horizontal pressing plate withstands second interior circle of workpiece first or workpiece, transverse horizontal arranges, pressing plate is perpendicular to horizontal pressing plate setting, and an end compresses horizontal pressing plate upper surface, the other end is fixedlyed connected with platen.
5. tripping sleeve processing method according to claim 1 is characterized in that, between described step (1) and (2), uses second welding position of half-sum workpiece on the magnetic powder inspection workpiece.
6. tripping sleeve processing method according to claim 1 is characterized in that, in the described step (7), finish-milling comprises: first second fluting and draining hole of split fluting, finish-milling workpiece of finish-milling workpiece.
7. tripping sleeve processing method according to claim 1 is characterized in that, checks in the described step (9) that the quality of circle in the workpiece is used endoscopy.
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