CN103317311B - Machining method of floating cylinder - Google Patents

Machining method of floating cylinder Download PDF

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Publication number
CN103317311B
CN103317311B CN201310282071.0A CN201310282071A CN103317311B CN 103317311 B CN103317311 B CN 103317311B CN 201310282071 A CN201310282071 A CN 201310282071A CN 103317311 B CN103317311 B CN 103317311B
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workpiece
split
flange
sum
milling
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CN103317311A (en
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曾强
冷进明
唐仕东
朱永祥
谢敏
刘家顺
孟秋建
谭云
李松林
崔志国
刘艳平
周万煜
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DEC Dongfang Turbine Co Ltd
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DEC Dongfang Turbine Co Ltd
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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

Tripping sleeve processing method
Technical field
The present invention relates to field of machining and machinebuilding technology, specifically a kind of processing method of the tripping sleeve for turbine testing stand.
Background technology
As shown in Figure 1 be tripping sleeve for turbine testing stand.During assembling, a rotating shaft is housed 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, the endoporus of left axle journal 2 and right axle journal 6 and cylindrical are all equipped with dynamic bearing and blind axle.Blind axle outside its left axle journal 2 or right axle journal 6 is supported on bearing housing, and the dynamic bearing inside left axle journal 2 and right axle journal 6 is enclosed within rotating shaft.In use, outboard bearing casing maintains static tripping sleeve, and inner rotating shaft is in rotation, and tripping sleeve itself then has very low-angle swing.
Tripping sleeve is upper and lower half structure, up and down partly respectively with steel plate or the forging welding fabrication of several sections of different-diameters, welds discontinuous flange, is referred to as split flange 5, perforate on split flange 5 outside split, goes up second with bolt-connection handle is tight.The appearance and size of tripping sleeve is comparatively large, and maximum cylindrical is about φ 700 ~ 1000mm, axial length about 2000 ~ 2500mm, minimum endoporus φ 280 ~ 350mm.Tripping sleeve is weldment supplied materials, and wall is thin, and the thinnest local wall thickness is only 20 ~ 30mm, and the endoporus of tripping sleeve, cylindrical arrange 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 many places oil leak hole.
And there is following difficulty in the processing of this tripping sleeve:
First, weldment supplied materials, and thin-walled, deflection is larger; Secondly, split clearance requirement is high, requires tight state 0.02mm clearance gauge not enter; Again, the processing dimension tolerance of tripping sleeve and Geometrical Tolerance Principle high, 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 axle journal cylindrical adopts rotor machining required precision completely, and endoporus also uses identical requirement.Finally, because of Workpiece length and reasons in structure, when milling split and turning, clamping difficulty is large.
Summary of the invention
The object of the invention is to: a kind of tripping sleeve processing method is provided, 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 sleeve-shaped, two ends are designed with axle journal and end flanges, tripping sleeve is upper and lower half structure, discontinuous flange is welded outside split, end flanges and split flange have connecting hole, second use bolt-connection of the upper half-sum of tripping sleeve is tight, and first of tripping sleeve is provided with fuel feed hole and oil pocket, and second is provided with oil leak hole; Described tripping sleeve processing method comprises the following steps:
(1) by the upper half-sum of workpiece to be processed second successively clamping on lathe, carry out roughing, be specially: rough mill half-sum workpiece on workpiece second split and connecting hole on pre-first split flange of drill workpiece, second rushes down oilhole to pre-milling workpiece;
(2) by half-sum workpiece on workpiece, second is integrated, to excircle of workpiece and inner circle allowance rough turn, the two ends axle journal of first piece;
(3) workpiece is taken apart into half-sum workpiece on workpiece second, second split of half-sum workpiece on finish-milling workpiece successively;
(4) by half-sum workpiece on workpiece, second is integrated, to cylindrical and inner circle 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, workpiece first creeps into oilhole, workpiece on second milling rush down oilhole, and to the connecting hole tapping on second split flange of workpiece;
(6) by clamping workpiece on boring machine, the fine thread on milling fuel feed hole, workpiece first oil groove and end flanges on connecting hole;
(7) workpiece is taken apart into half-sum workpiece on workpiece second, on finish-milling workpiece half-sum workpiece second;
(8) by half-sum workpiece on workpiece, second is integrated, finish turning excircle of workpiece;
(9) workpiece is taken apart into half-sum workpiece on workpiece second, cleaning surface also checks the surface quality of excircle of workpiece and inner circle;
(10) by half-sum workpiece on workpiece, second is integrated, and oiling is put in storage.
In described step (1), use frock by workpiece first or second clamping of workpiece on platen, this frock comprises 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 is evenly arranged between split outer flange and platform, hold down gag comprises horizontal pressing plate and pressing plate, horizontal pressing plate withstands second inner circle of workpiece first or workpiece, transverse horizontal is arranged, pressing plate is arranged perpendicular to horizontal pressing plate, one end compresses horizontal pressing plate upper surface, the other end is fixedly connected with platen.
In described step (2), boring machine is adopted to see light workpiece two ends end face of flange, end face seam is bored at thinner end face of flange, by end face seam location, on this end face of flange, handle unifies an end face closure plate, during follow-up turnery processing, adopt the end face of flange that claw holding workpiece is thicker, tailstock centre withstands on clamping on closure plate centre bore.
In described step (3), use frock by workpiece first or second clamping of workpiece on platen, this frock comprises semicircle back-up block, 2 groups of hold down gags and several jack, described semicircle back-up block upper surface is the semicircular arc-shaped of indent, put off and second cylindrical of workpiece first or workpiece of fitting, both sides, semicircle back-up block top are provided with platform, second split outer flange of corresponding workpiece first or workpiece, jack is evenly arranged between split outer flange and platform, hold down gag comprises horizontal pressing plate and pressing plate, horizontal pressing plate withstands second inner circle of workpiece first or workpiece, transverse horizontal is arranged, pressing plate is arranged perpendicular to horizontal pressing plate, one end compresses horizontal pressing plate upper surface, the other end is fixedly connected with platen.
Between described step (1) and (2), use second welding position of half-sum workpiece on magnetic powder inspection workpiece.
In described step (7), finish-milling comprises: finish-milling workpiece first split fluting, finish-milling workpiece second fluting and oil leak hole.
Check in described step (9) that the quality of workpiece inner circle uses endoscopy.
The beneficial effect that the present invention produces is:
1) the inventive method can meet instructions for use, ensure that crudy preferably, solve new product produce in may Problems existing, and for the processing of product determine one more rationally, more perfect process program.
2) clamping tooling of design specialized ensures effective clamping, guarantees split clearance requirement;
3) determine turning installation way and determine that rational cutting parameter is guaranteed that dimensional tolerance and cylindrical are beated and met technical requirement.
4) distortion of thin-wall part is controlled well, for subsequent production is accumulated experience.
Accompanying drawing explanation
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 structure schematic diagram of tripping sleeve in milling process.
Number in the figure represents: the left axle journal of 1-fuel feed hole, 2-, 3-oil leak 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.
Detailed description of the invention
As shown in Figures 1 to 3, tripping sleeve to be processed is sleeve-shaped, two ends are designed with axle journal and end flanges, tripping sleeve is upper and lower half structure, discontinuous flange is welded outside split, end flanges and split flange 5 have connecting hole 4, second use bolt-connection of the upper half-sum of tripping sleeve is tight, and first of tripping sleeve is provided with fuel feed hole 1 and oil pocket, and second is provided with oil leak hole 3.
The present invention is the processing method of above-mentioned tripping sleeve, comprises the following steps:
(1) by the upper half-sum of workpiece to be processed second successively clamping on lathe, carry out roughing, be specially: rough mill half-sum workpiece on workpiece second split and connecting hole 4 on pre-first split flange 5 of drill workpiece, second rushes down oilhole to pre-milling workpiece;
Wherein: use frock by 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 surface is 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 is evenly arranged between split outer flange and platform, hold down gag comprises horizontal pressing plate 9 and pressing plate 8, horizontal pressing plate 9 withstands workpiece first or second inner circle of 10 of workpiece, transverse horizontal is arranged, pressing plate 8 is arranged perpendicular to horizontal pressing plate 9, one end compresses horizontal pressing plate 9 upper surface, the other end is fixedly connected with platen.
Concrete:
(i), after line completes, just start to rough mill second split of half-sum workpiece on workpiece successively.When measuring more above, the initial cutting-in parameter adding man-hour to less, gradually reduce again subsequently, improve the roughness on surface, after milling completes, range estimation roughness can ensure at below Ra3.2, substantially can meet instructions for use.
In the same way, also complete milling to second split of sleeve, after milling, split data of beating meet drawing requirement.
Afterwards, second welding position of half-sum workpiece on magnetic particle testing workpiece is used.
(ii) the connecting hole 4(bored on split flange 5 connects screw):
Operation and the milling split intersection of boring connection screw are carried out, concrete: the drilling of the connecting hole 4 on first split flange 5 of workpiece is carried out after first split milling well.After connecting hole 4 on first split flange 5 is machined, again by workpiece on first drilling machine carried out shaving.Connecting hole 4 on second split flange 5 of workpiece, be by half-sum workpiece on workpiece second to its centering after, draw the position of the connecting hole 4 on second split flange 5 according to connecting hole 4 position on first split flange 5.Then gantry mill is according to the hole tool setting in each section of size marking datum line starting point, check scribing position, confirm errorless after again the connecting hole 4 on second split flange 5 is machined.
Because the connecting hole 4 on second split flange 5 is screw, therefore, tapping has been carried out in pincers worker after this.
After upper and lower half-connection hole 4 all machines, smoothly tight bolt, check clearance gauge 0.02mm under tight state not enter.Before screwde on, centering part can be had in order to lower operation is rough turn, therefore go up face plate and place's contour point has been beaten at upper and lower half axle journal cylindrical place, two ends respectively.
(2) by half-sum workpiece on workpiece, second is integrated, to excircle of workpiece and inner circle allowance rough turn, the two ends axle journal of first piece;
Wherein: adopt boring machine to see light workpiece two ends end face of flange, end face seam 7 is bored at thinner end face of flange, located by end face seam 7, handle unifies an end face closure plate on this end face of flange, during follow-up turnery processing, adopt the end face of flange that claw holding workpiece is thicker, tailstock centre withstands on clamping on closure plate centre bore.
After clamping completes, it is centering problem.Because plug centre bore and seam are that a cutter processes, therefore can think sleeve lean on tailstock end to be positioned in the heart, only need the cylindrical of centering claw side.Because there is contour point two place at axle journal place, therefore can centering overwinding rotating shaft and perpendicular to the direction of split, but split direction is without centering band, can only adopt the method for symmetric points centering.
After centering, just start rough turn cylindrical.
After cylindrical is rough turn, then start the processing of endoporus.Before processing, first by part centering, centering needs to utilize centre frame to adjust it.Because part is comparatively large, therefore centre frame adjustment is very inconvenient, regulate the height of its roller, front and back position, after probably having adjusted, must be finely tuned, by its centering within 0.02mm by the situation of beating of observing when playing table.
In addition, because endoporus working depth is comparatively dark, and endoporus not easily observes its state adding man-hour, monolaterally stays 2mm allowance, and during inspection, beat is within 0.02mm.
(3) workpiece is taken apart into half-sum workpiece on workpiece second, second split of half-sum workpiece on finish-milling workpiece successively;
Wherein: use frock by workpiece first or second clamping of workpiece on platen, this frock comprises semicircle back-up block, 2 groups of hold down gags and several jack 11, described semicircle back-up block upper surface is the semicircular arc-shaped of indent, put off and second cylindrical of workpiece first or workpiece of fitting, semicircle supports both sides, shape block top and is provided with platform, second split outer flange of corresponding workpiece first or workpiece, jack 11 is evenly arranged between split outer flange and platform, hold down gag comprises horizontal pressing plate 9 and pressing plate 8, horizontal pressing plate 9 withstands second inner circle of workpiece first or workpiece, transverse horizontal is arranged, pressing plate 8 is arranged perpendicular to horizontal pressing plate 9, one end compresses horizontal pressing plate 9 upper surface, the other end is fixedly connected with platen.
(4) by half-sum workpiece on workpiece, second is integrated, to cylindrical and inner circle allowance half finish turning of workpiece axle journal;
Just start the finish turning of inner circle after seeing light cylindrical, according to situation about analyzing when making scheme, the finish turning of inner circle is the maximum place of difficulty, and its process takes programming in sections, the mode of segmental machining is carried out.After inner circle machines, upper baffle carries out turning to foreign round.
(5) according to connecting hole 4 corresponding on connecting hole 4 position on first split flange 5 of workpiece, second split flange 5 of workpiece that drills and reams, first creeps into oilhole 1 at workpiece, at workpiece, second bore and rush down oilhole, and to connecting hole 4 tapping on second split flange 5 of workpiece.
(6) by clamping workpiece on boring machine, the fine thread on milling fuel feed hole, workpiece first oil groove and end flanges on connecting hole; First the fine thread on Milling Process fuel feed hole, then first oil groove of Milling Process workpiece, finally to process second the connecting hole of end flanges of half-sum workpiece on workpiece and heavy face to be carried out to counter scraping.
(7) workpiece is taken apart into half-sum workpiece on workpiece second, on finish-milling workpiece half-sum workpiece second;
Finish-milling mainly processes the fluting etc. on some endoporus, split, comprising: finish-milling workpiece first split fluting, finish-milling workpiece second fluting and oil leak hole 3.First process be workpiece second, adjustment jack 11 coordinate the mode of dial gauge beat value to carry out centering, use right-angle milling head processing fluting and screw bottom outlet.Because oil leak hole 3 is " fall T " shape, taking the mode of first having altered size, pre-holes drilled through, altering the cylindrical side size surplus after standing up by measuring oil leak hole 3 with the distance of positioning datum.Then processing work first split fluting.
(8) by half-sum workpiece on workpiece, second is integrated, clamping on lathe to excircle of workpiece finish turning; Last procedure of processing, only to requiring that the highest cylindrical carries out turning.
(9) workpiece is taken apart into half-sum workpiece on workpiece second, cleaning surface also checks the surface quality of excircle of workpiece and inner circle; Wherein: check that the quality of workpiece inner circle uses endoscopy.
(10) by half-sum workpiece on workpiece, second is integrated, and oiling is put in storage.
Below the turning in process and milling two master operations are analyzed:
A. turning: rough turn, half finish turning of step (4) and the finish turning of step (8) that comprise step (2).
, in turning process, all there is larger difficulty to the guarantee of the control of its clamping, deflection and roughness in processing difficulties: each shelves endoporus of this tripping sleeve, cylindrical are black skin.
Innovative point is:
A. for convenience of turning clamping, light is the two ends end flanges of the workpiece after conjunction to adopt boring machine to see, the size simultaneously boring end face seam 7(end face seam 7 on the end flanges that workpiece is thinner strictly controls), and the connecting hole on preboring end flanges, located by end face seam 7 like this, by closure plate on the tight end flanges thinner at workpiece;
During turnery processing, adopt the claw clamping of lathe on the thicker end flanges of workpiece after closing, tailstock centre withstands on closure plate centre bore, clamping problem when solving turning well, to workpiece.
B. the end flanges owing to filling closure plate side is thinner, and clamping is very easily out of shape, and the present invention increases closure plate at this, improves the rigidity of this end flanges, reduces workpiece deformation;
C. in turning, the cooperation adjustment of cutting parameter, lathe rotating speed, feed scheme and tailstock pressure.
D. closure plate Fixture Design, making: with being guarantee positioning precision, the end face seam 7 on the end flanges that workpiece is thinner is taper fit with the matching design of closure plate.Tapering size strictly controls according to end face seam 7 size of tripping sleeve, and meanwhile, according to the connecting hole of preboring on tripping sleeve end flanges, on closure plate, correspondence gets out connecting hole.In order to ensure closure plate centre bore and tripping sleeve technique seam with one heart, require under clamped one time state, complete the closure plate conical surface and centre bore processing.
B. milling: comprise the rough milling of step (1), the finish-milling of step (3) and step (6).
Difficult point: the upper half-sum of this tripping sleeve second be semi-circular structure, contour structures is more complicated, and wall thickness is thin, and axial length is longer, and integral rigidity is poor, and milling process clamping difficulty is very large.
Innovative point is:
A. rough milling split adopts special V-arrangement back-up block 12 to support, and two ends axle journal is main support point, middle employing multiple spot supplemental support point.Point face outer flange and both sides, V-arrangement back-up block 12 top platform are put within the workpiece, can all use adjustable for height jack 11 to support, also can side equal-height padding iron fixed support, opposite side use jack 11 adjustable support.Design like this, can carry out centering by the height adjusting jack 11.
Due to, this tripping sleeve split all needs milling, pressing plate 8 is not suitable for riding over split, Given this, horizontal pressing plate 9 is set up at sleeve two ends inner circle, re-using pressing plate 8 is vertically erected on horizontal pressing plate 9, so design make stressed more rationally, power decomposed two places, milling process is more stable, not yielding.Two many places, side flange lower surfaces use jack 11 supplemental support, workpiece can be avoided to tremble, reduce the deflection of tripping sleeve in milling process.This installation way can ensure that the disposable milling of whole split completes.
In addition when finish-milling, devise special semi-circular back-up block, replacement V-arrangement back-up block 12, other remain unchanged as pressing plate 8, horizontal pressing plate 9 and jack 11 etc.Wherein semi-circular back-up block has changed the upper surface of V-arrangement back-up block 12 into recessed semicircle by inclined-plane, and this diameter of a circle according to excircle of sleeve survey size+0.02mm coordinate process.
B. the reasonable selection of cutting parameter, tool path pattern in milling process, the real-time adjustment of thrust.
C. result of use: use the part that above-mentioned processing method processes, it is completely qualified to check.Wherein, after finish turning completes, all sizes all meet drawing requirement, and two ends axle journal jitter values is respectively 0.015mm and 0.005mm; After finish-milling split completes, split maximum difference of beating is 0.02mm; After dress pin handle is tight, split gap 0.02mm clearance gauge does not enter, and fullys meet Design Requirement Drawing.

Claims (7)

1. a tripping sleeve processing method, described tripping sleeve is sleeve-shaped, two ends are designed with axle journal and end flanges, tripping sleeve is upper and lower half structure, discontinuous flange is welded outside split, end flanges and split flange have connecting hole, second use bolt-connection of the upper half-sum of tripping sleeve is tight, and first of tripping sleeve is provided with fuel feed hole and oil pocket, and second is provided with oil leak hole; It is characterized in that, described tripping sleeve processing method comprises the following steps:
(1) by the upper half-sum of workpiece to be processed second successively clamping on lathe, carry out roughing, be specially: rough mill half-sum workpiece on workpiece second split and connecting hole on pre-first split flange of drill workpiece, second rushes down oilhole to pre-milling workpiece;
(2) by half-sum workpiece on workpiece, second is integrated, to excircle of workpiece and inner circle allowance rough turn, the two ends axle journal of first piece;
(3) workpiece is taken apart into half-sum workpiece on workpiece second, second split of half-sum workpiece on finish-milling workpiece successively;
(4) by half-sum workpiece on workpiece, second is integrated, to cylindrical and inner circle 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, workpiece first creeps into oilhole, workpiece on second milling rush down oilhole, and to the connecting hole tapping on second split flange of workpiece;
(6) by clamping workpiece on boring machine, the fine thread on milling fuel feed hole, workpiece first oil groove and end flanges on connecting hole;
(7) workpiece is taken apart into half-sum workpiece on workpiece second, on finish-milling workpiece half-sum workpiece second;
(8) by half-sum workpiece on workpiece, second is integrated, finish turning excircle of workpiece;
(9) workpiece is taken apart into half-sum workpiece on workpiece second, cleaning surface also checks the surface quality of excircle of workpiece and inner circle;
(10) by half-sum workpiece on workpiece, second is integrated, and oiling is put in storage.
2. tripping sleeve processing method according to claim 1, it is characterized in that, in described step (1), use frock by workpiece first or second clamping of workpiece on platen, this frock comprises 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 is evenly arranged between split outer flange and platform, hold down gag comprises horizontal pressing plate and pressing plate, horizontal pressing plate withstands second inner circle of workpiece first or workpiece, transverse horizontal is arranged, pressing plate is arranged perpendicular to horizontal pressing plate, one end compresses horizontal pressing plate upper surface, the other end is fixedly connected with platen.
3. tripping sleeve processing method according to claim 1, it is characterized in that, in described step (2), boring machine is adopted to see light workpiece two ends end face of flange, end face seam is bored at thinner end face of flange, by end face seam location, on this end face of flange a unification end face closure plate, during follow-up turnery processing, adopt the end face of flange that claw holding workpiece is thicker, tailstock centre withstands on clamping on closure plate centre bore.
4. tripping sleeve processing method according to claim 1, it is characterized in that, in described step (3), use frock by workpiece first or second clamping of workpiece on platen, this frock comprises semicircle back-up block, 2 groups of hold down gags and several jack, described semicircle back-up block upper surface is the semicircular arc-shaped of indent, put off and second cylindrical of workpiece first or workpiece of fitting, both sides, semicircle back-up block top are provided with platform, second split outer flange of corresponding workpiece first or workpiece, jack is evenly arranged between split outer flange and platform, hold down gag comprises horizontal pressing plate and pressing plate, horizontal pressing plate withstands second inner circle of workpiece first or workpiece, transverse horizontal is arranged, pressing plate is arranged perpendicular to horizontal pressing plate, one end compresses horizontal pressing plate upper surface, the other end is fixedly 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 magnetic powder inspection workpiece.
6. tripping sleeve processing method according to claim 1, is characterized in that, in described step (7), finish-milling comprises: finish-milling workpiece first split fluting, finish-milling workpiece second fluting and oil leak hole.
7. tripping sleeve processing method according to claim 1, is characterized in that, checks that the surface quality of workpiece inner circle uses endoscopy in described step (9).
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CN102825515A (en) * 2012-08-23 2012-12-19 常州宝菱重工机械有限公司 Machining method of high-accuracy cutter shaft of rotary shear
CN102935580A (en) * 2012-10-31 2013-02-20 常州大学 Large gear ring subdividing positioning and connecting method
CN102962642A (en) * 2012-11-16 2013-03-13 大连洁能重工机械有限公司 Wind turbine torsion shaft machining process

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