CN106624660B - A kind of technique of accurate processing three-jaw ring flange - Google Patents

A kind of technique of accurate processing three-jaw ring flange Download PDF

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Publication number
CN106624660B
CN106624660B CN201710051232.3A CN201710051232A CN106624660B CN 106624660 B CN106624660 B CN 106624660B CN 201710051232 A CN201710051232 A CN 201710051232A CN 106624660 B CN106624660 B CN 106624660B
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CN
China
Prior art keywords
jaw
claw
plate
workpiece
ring flange
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.)
Active
Application number
CN201710051232.3A
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Chinese (zh)
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CN106624660A (en
Inventor
杨小凯
昝少锋
刘学仃
雷务然
顾鲜美
李磊
赵贺
柴二帅
付浩锋
刘金檑
李品
周建喜
马喜岭
陈云升
韩利
齐瑞晓
李庆玲
黄俊龙
徐阳阳
刘沛
张孟涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xuchang Yuandong Drive Shaft Co Ltd
Original Assignee
Xuchang Yuandong Drive Shaft Co Ltd
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Publication date
Application filed by Xuchang Yuandong Drive Shaft Co Ltd filed Critical Xuchang Yuandong Drive Shaft Co Ltd
Priority to CN201710051232.3A priority Critical patent/CN106624660B/en
Publication of CN106624660A publication Critical patent/CN106624660A/en
Application granted granted Critical
Publication of CN106624660B publication Critical patent/CN106624660B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
    • B23B31/16004—Jaws movement actuated by one or more spiral grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/12—Chucks with simultaneously-acting jaws, whether or not also individually adjustable
    • B23B31/16—Chucks with simultaneously-acting jaws, whether or not also individually adjustable moving radially
    • B23B31/16004—Jaws movement actuated by one or more spiral grooves
    • B23B31/16008—Details of the jaws
    • B23B31/16012—Form of the jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
    • B23B47/28—Drill jigs for workpieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
    • B23Q3/06—Work-clamping means
    • B23Q3/08—Work-clamping means other than mechanically-actuated
    • B23Q3/082—Work-clamping means other than mechanically-actuated hydraulically actuated

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping On Spindles (AREA)

Abstract

The invention discloses a kind of technique of accurate processing three-jaw ring flange, processing technology includes the following steps：Step 1, the blind-hole bottom centering of bottom end, step 2, turning neck body outer circle and three claw end three-jaw side surfaces and its back side, step 3, end tri-claw plate end face blind hole at the top of turning, step 4, three holes at the top of drilling on the tri-claw plate end face of end.The present invention compared with prior art it is of the invention it is a kind of it is accurate processing three-jaw ring flange tooling technique, technological process is simple, reasonable design, start the flow that processing replaces previous both ends while processing by bare terminal end of workpiece one end, the workpiece center hole processed in this way is accurately consistent, both ends circle concentricity is high, effectively improves the yields of product；The technique of accurate processing three-jaw ring flange tooling provided by the invention can improve work pieces process efficiency again while improving workpiece accuracy.

Description

A kind of technique of accurate processing three-jaw ring flange
Technical field
The invention belongs to clamping tool for machine work technical field, specifically a kind of work of accurate processing three-jaw ring flange Skill.
Background technology
Transmission shaft is the important component of passing power in automotive transmission, its effect is together with gearbox, drive axle The power of engine is passed into wheel, vehicle is made to generate the driving force needed for movement, transmission shaft is a high rotating speed, few bearing Rotary body, be the transmission device that automobile can operate.Transmission shaft is particularly important in the transmission system of automobile, therefore automobile passes The connection installation of moving axis is the premise that automobile is capable of safe handling.
The connection installation of truck drive shaft be unable to do without transmission shaft connecting flange, and to the essence of transmission shaft connecting flange workpiece Exactness requirement is very high, and existing transmission shaft flange disk processing technology is in the process of transmission shaft three-jaw mounting flange, adding Work complex operation, position fixing process are slow, and easily cause the features such as workpiece slot hole is deep mixed, both ends circle concentricity is poor, manufacture Product high rejection rate, cause unnecessary economic loss, therefore three-jaw method can be accurately processed there is an urgent need for researching and developing one kind The satisfactory processing technology of blue disk tooling both ends circle concentricity.
Invention content
Technical problem to be solved by the invention is to provide a kind of processing three-jaw ring flange works easy to operate, registration The process program of dress, existing processing technology is complicated for operation, position fixing process is slow to solve, and easily cause workpiece slot hole it is deep mixed, The drawbacks such as both ends circle concentricity difference.
Used technical solution is the present invention to solve above-mentioned technical problem：A kind of work of accurate processing three-jaw ring flange Skill, the cylindrical neck body and bottom end and three claw ends positioned at neck body both ends that three-jaw ring flange blank includes middle part, The bottom end is the cylindrical end that diameter is more than neck body, and three claw ends are subtriangular tri-claw plate end, bottom Blind hole in an axial direction is both provided on the end face of portion end and three claw ends, and the blind hole inner wall of bottom end is arranged with two A limited block, the blind hole diameter of three claw ends are less than the blind hole diameter of bottom end, and processing technology includes the following steps：
Step 1, the blind-hole bottom centering of bottom end, positioning fixture one clamp the neck body among three-jaw ring flange, Three claw ends are withstood, positioning is completed, and the blind-hole bottom in bottom end punches；
Step 2, turning neck body outer circle and three claw end three-jaw side surfaces and its back side：The band at spindle of numerical control lathe end There is the top of limited block to withstand in the centre bore of step 1 processing, spindle end limited block blocks the limited block of workpiece bottom end, Workpiece provides power, the top three-jaw side surface blind hole for withstanding three claw ends of tail end, fixed rear car neck by spindle nose limited block External circle and three claw end three-jaw side surfaces and its back side；
Step 3, three claw end three-jaw side surface blind hole of turning：Positioning fixture two is adjusted, it is made to clamp workpiece bottom end Head completes positioning, processes three claw end tri-claw plate end face center blind holes；
Workpiece is placed on the positioning device, starts liquid by step 4, three holes in three claw end three-jaw side surface of drilling Cylinder pressure clamps workpiece, completes positioning, drills to the three-jaw in three claw end three-jaw side surfaces.
As a kind of being further improved for technique of accurate processing three-jaw ring flange of the present invention：The processing technology step 1 In positioning fixture one used specifically include chuck body, workpiece cleat assembly, jacking block cleat assembly and T shape jacking blocks, the workpiece Cleat assembly and jacking block cleat assembly are made of upper clamp plate and lower clamp plate, and upper clamp plate and the opposite end face of lower clamp plate are arc folder Hold face, the lower clamp plate of workpiece cleat assembly and jacking block cleat assembly is fixed in chuck body, workpiece cleat assembly and The upper clamp plate of jacking block cleat assembly is slidably arranged in chuck body, and two upper clamp plates are connected separately with driving and move down thereon Dynamic hydraulic cylinder, the T shapes jacking block include the neck tube being clamped convenient for jacking block cleat assembly and for holding out against three-jaw method The top plate of blue disk, top plate are vertically set on one end of neck tube.
As a kind of being further improved for technique of accurate processing three-jaw ring flange of the present invention：The processing technology step 3 In positioning fixture two used specifically include chuck body, movable jaw and fore-set, the chuck body is the cylinder that center is provided with through-hole Body, radially there are three sliding slots for setting in the circular end face of chuck body, and the lower end of the movable jaw is provided with and can match with sliding slot The feather key of conjunction, three movable jaws are separately positioned on by feather key in three sliding slots of chuck body, the inner end of the movable jaw Face is clamping face, and the clamping face of three movable jaws forms the station for placing three-jaw ring flange, and the clamping of movable jaw Anti-skid chequer is provided on face, the movable jaw offers thread groove close to the upper surface of inside, and fore-set is revolved by its end of thread It is located at the upper surface of movable jaw.
As a kind of being further improved for technique of accurate processing three-jaw ring flange of the present invention：The processing technology step 4 In positioning device used specifically include pedestal, bushing plate, drill jig sleeve, positioning pin, supporting plate, hydraulic cylinder and V-arrangement locating piece group, it is described Pedestal includes the vertically disposed support arm of lower plate and both sides, and the top of support arm is equipped with bushing plate, two support arms it is opposite Sliding slot is equipped on side, the supporting plate is arranged between two support arms, and can be moved up and down by sliding slot, the hydraulic cylinder Be fixed on the position being located on lower plate between two support arms, the piston rod of hydraulic cylinder is vertically arranged, and piston rod top with Supporting plate bottom connect, the positioning pin be arranged on the lower face of bushing plate, bushing plate using positioning pin as on the circumference in the center of circle There are three the preformed hole for installing drill jig sleeve, the V-arrangement locating piece groups to be arranged in the lower face of bushing plate, V-arrangement locating piece for cloth Group includes being disposed therein two V-arrangement locating pieces of a drill jig sleeve both sides.
Advantageous effect
The technique of a kind of accurate processing three-jaw ring flange tooling of the invention compared with prior art, technological process is simple, if Meter is reasonable, starts the flow that processing replaces previous both ends while processing, the work processed in this way by bare terminal end of workpiece one end Part centre bore is accurately consistent, and both ends circle concentricity is high, effectively improves the yields of product；Accurate processing three-jaw provided by the invention The technique of ring flange tooling can improve work pieces process efficiency again while improving workpiece accuracy.
Description of the drawings
Fig. 1 is the structural schematic diagram of workpieces processing of the present invention；
Fig. 2 is the bottom end end schematic diagram of workpieces processing of the present invention；
Fig. 3 is one structural schematic diagram of positioning fixture in procedure of processing one of the present invention；
Fig. 4 is two structural schematic diagram of positioning fixture in procedure of processing three of the present invention；
Fig. 5 is positioning device structure schematic diagram in procedure of processing four of the present invention；
It is marked in figure：1, bottom end, 2, neck body, 3, three claw ends, 4, limited block, 11, chuck body, 12 workpiece clamps Board group part, 13, jacking block cleat assembly, 14, T shape jacking blocks, 31, chuck body, 32, movable jaw, 33, fore-set, 41, pedestal, 42, bore Template, 43, drill jig sleeve, 44, positioning pin, 45, supporting plate, 46, hydraulic cylinder, 47, V-arrangement locating piece, 48, sliding slot.
Specific implementation mode
As shown, a kind of technique of accurate processing three-jaw ring flange, three-jaw ring flange blank includes the cylinder at middle part Neck body 2 and bottom end 1 and three claw ends 3 positioned at 2 both ends of neck body, the bottom end 1 are that diameter is more than neck body 2 Cylindrical end, three claw ends 3 are subtriangular tri-claw plate end, on the end face of bottom end 1 and three claw ends 3 It is both provided with blind hole in an axial direction, and the blind hole inner wall of bottom end 1 is arranged with two limited blocks 4, the blind hole of top end 3 Diameter is less than the blind hole diameter of bottom end 1, and processing technology includes the following steps：
The positioning fixture one of step 1, the blind-hole bottom centering of bottom end 1, use includes chuck body 11, work Part cleat assembly 12, jacking block cleat assembly 13 and T shapes jacking block 14, the workpiece cleat assembly 12 and jacking block cleat assembly 13 by Upper clamp plate and lower clamp plate composition, upper clamp plate and the opposite end face of lower clamp plate are arc clamping face, workpiece cleat assembly 12 and jacking block The lower clamp plate of cleat assembly 13 is fixed in chuck body 11, workpiece cleat assembly 12 and jacking block cleat assembly 13 it is upper Clamping plate is slidably arranged in chuck body 11, and two upper clamp plates are connected separately with the hydraulic cylinder for driving it to move up and down, institute It includes the neck tube for being convenient for jacking block cleat assembly 13 to be clamped and the top for holding out against three-jaw ring flange to state T shapes jacking block 14 Plate, top plate are vertically set on one end of neck tube；Workpiece is placed on the lower clamp plate of workpiece cleat assembly 12, makes to be placed on top T shapes jacking block 14 on 13 lower clamp plate of block cleat assembly withstands three claw end 3 of workpiece, starts hydraulic cylinder, workpiece cleat assembly 12 Workpiece neck body 2 and T shapes jacking block 14 are clamped respectively with jacking block cleat assembly 13, and positioning is completed, and the blind-hole bottom in bottom end 1 is beaten Hole；
Step 2,2 outer circle of turning neck body and three claw ends, 3 three-jaw side surface and its back side, spindle of numerical control lathe end Top with limited block withstands in the centre bore of step 1 processing, and spindle end limited block blocks the limit of workpiece bottom end 1 Block 4, workpiece provide power, the top three-jaw side surface blind hole for withstanding three claw ends 3 of tail end, after fixed by spindle nose limited block 2 outer circle of vehicle neck body and three claw ends, 3 three-jaw side surface and its back side；
The positioning fixture two of step 3, three claw end of turning, 3 three-jaw side surface blind hole, use includes chuck body 31, lives Dynamic claw 32 and fore-set 33, the chuck body 31 are the cylinder that center is provided with through-hole, radial in the circular end face of chuck body 31 There are three sliding slots for setting, and the lower end of the movable jaw 32 is provided with can be with the matched feather key of sliding slot, three movable jaws 32 It is separately positioned in three sliding slots of chuck body 31 by feather key, the inner face of the movable jaw 32 is clamping face, three work The clamping face of dynamic claw 32 forms the station for placing three-jaw ring flange, and is provided on the clamping face of movable jaw 32 anti-skidding Line, the movable jaw 32 offer thread groove close to the upper surface of inside, and fore-set 33 is located at active card by the rotation of its end of thread The upper surface of pawl 32；The length for adjusting fore-set 33 in positioning fixture two makes it withstand the three-jaw of three claw ends 3, adjusts chuck Body 31 makes movable jaw 32 clamp workpiece bottom end 1, completes positioning, processes three claw ends, 3 tri-claw plate end face center blind hole；
The positioning device of step 4, three holes in three claw end of drilling, 3 three-jaw side surface, use includes pedestal 41, bores Template 42, drill jig sleeve 43, positioning pin 44, supporting plate 45, hydraulic cylinder 46 and V-arrangement locating piece group 47, the pedestal 41 include lower plate It is equipped with bushing plate 42 with the top of the vertically disposed support arm in both sides, support arm, is equipped on the opposite flank of two support arms Sliding slot 48, the supporting plate 45 is arranged between two support arms, and can be moved up and down by sliding slot 48, and the hydraulic cylinder 46 is fixed It is located at the position between two support arms on lower plate, the piston rod of hydraulic cylinder 46 is vertically arranged, and piston rod top and support 45 bottom of plate connects, and it is the center of circle that the positioning pin 44, which is arranged on the lower face of bushing plate 42, bushing plate 42 with positioning pin 44, The uniformly distributed preformed hole there are three for installing drill jig sleeve 43 on circumference, the V-arrangement locating piece group 47 are arranged under bushing plate 42 End face, V-arrangement locating piece group 47 include being disposed therein two V-arrangement locating pieces of 43 both sides of drill jig sleeve；By three claw of tooling The end face blind hole of end 3 is directed at positioning pin 44, and V-arrangement locating piece group 47 is made to block a pawl of three-jaw side surface, starts hydraulic cylinder 46, 45 top tight workpiece of supporting plate completes positioning, drills to the three-jaw in three claw ends, 3 three-jaw side surface.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification For the equivalent embodiment of equivalent variations, as long as be without departing from technical solution of the present invention content, it is right according to the technical essence of the invention Any simple modification, equivalent change and modification made by above example, in the range of still falling within technical solution of the present invention.

Claims (4)

1. a kind of technique of accurate processing three-jaw ring flange, three-jaw ring flange blank includes the cylindrical neck body at middle part（2）And Positioned at neck body（2）The bottom end at both ends（1）With three claw ends（3）, the bottom end（1）It is more than neck body for diameter（2） Cylindrical end, three claw ends（3）For subtriangular tri-claw plate end, bottom end（1）With three claw ends（3） End face on be both provided with blind hole in an axial direction, and bottom end（1）Blind hole inner wall be arranged with two limited blocks（4）, three Claw end（3）Blind hole diameter be less than bottom end（1）Blind hole diameter, it is characterised in that：Processing technology includes following step Suddenly：
Step 1, bottom end（1）Blind-hole bottom centering, positioning fixture one clamps the neck body among three-jaw ring flange （2）, withstand three claw ends（3）, positioning is completed, in bottom end（1）Blind-hole bottom punching；
Step 2, turning neck body（2）Outer circle and three claw ends（3）Three-jaw side surface and its back side, spindle of numerical control lathe end Top with limited block withstands in the centre bore of step 1 processing, and spindle end limited block blocks workpiece bottom end（1）Limit Position block（4）, for workpiece by spindle nose limited block offer power, tail end is top to withstand three claw ends（3）Three-jaw side surface blind hole, Fixed rear car neck body（2）Outer circle and three claw ends（3）Three-jaw side surface and its back side；
Step 3, three claw end of turning（3）Three-jaw side surface blind hole adjusts positioning fixture two, movable jaw is made to clamp workpiece Bottom end（1）, the end of three fore-sets withstands on the three-jaw back side of tri-claw plate, completes positioning, three claw ends of processing respectively（3） Tri-claw plate end face center blind hole；
Step 4, three claw end of drilling（3）Workpiece is placed on the positioning device, starts liquid by three holes in three-jaw side surface Cylinder pressure clamps workpiece, positioning is completed, to three claw ends（3）Three-jaw in three-jaw side surface drills.
2. a kind of technique of accurate processing three-jaw ring flange according to claim 1, it is characterised in that：The processing technology Positioning fixture one used specifically includes chuck body in step 1（11）, workpiece cleat assembly（12）, jacking block cleat assembly（13） With T shape jacking blocks（14）, the workpiece cleat assembly（12）With jacking block cleat assembly（13）It is made of upper clamp plate and lower clamp plate, on Clamping plate and the opposite end face of lower clamp plate are arc clamping face, workpiece cleat assembly（12）With jacking block cleat assembly（13）Lower clamp plate It is fixed at chuck body（11）On, workpiece cleat assembly（12）With jacking block cleat assembly（13）Upper clamp plate slide and set It sets in chuck body（11）On, and two upper clamp plates are connected separately with the hydraulic cylinder for driving it to move up and down, the T shapes jacking block （14）Including being convenient for jacking block cleat assembly（13）The neck tube being clamped and the top plate for holding out against three-jaw ring flange, top plate It is vertically set on one end of neck tube.
3. a kind of technique of accurate processing three-jaw ring flange according to claim 1, it is characterised in that：The processing technology Positioning fixture two used specifically includes chuck body in step 3（31）, movable jaw（32）And fore-set（33）, the chuck body （31）The cylinder of through-hole, chuck body are provided with for center（31）Circular end face on radially setting is there are three sliding slot, the activity Claw（32）Be provided with can be with the matched feather key of sliding slot, three movable jaws for lower end（32）It is separately positioned on card by feather key Disk body（31）Three sliding slots in, the movable jaw（32）Inner face be clamping face, three movable jaws（32）Clamping Face forms the station for placing three-jaw ring flange, and movable jaw（32）Clamping face on be provided with anti-skid chequer, the activity Claw（32）Upper surface close to inside offers thread groove, fore-set（33）It is located at movable jaw by the rotation of its end of thread（32）'s Upper surface.
4. a kind of technique of accurate processing three-jaw ring flange according to claim 1, it is characterised in that：The processing technology Positioning device used specifically includes pedestal in step 4（41）, bushing plate（42）, drill jig sleeve（43）, positioning pin（44）, supporting plate （45）, hydraulic cylinder（46）With V-arrangement locating piece group（47）, the pedestal（41）Including the vertically disposed support of lower plate and both sides The top of arm, support arm is equipped with bushing plate（42）, sliding slot is equipped on the opposite flank of two support arms（48）, the supporting plate （45）It is arranged between two support arms, and sliding slot can be passed through（48）It moves up and down, the hydraulic cylinder（46）It is fixed on lower plate The upper position being located between two support arms, hydraulic cylinder（46）Piston rod be vertically arranged, and piston rod top and supporting plate（45） Bottom connects, the positioning pin（44）It is arranged in bushing plate（42）Lower face, bushing plate（42）On with positioning pin（44）For circle It is uniformly distributed on the circumference of the heart that there are three for installing drill jig sleeve（43）Preformed hole, the V-arrangement locating piece group（47）It is arranged in drill jig Plate（42）Lower face, V-arrangement locating piece group（47）Including being disposed therein a drill jig sleeve（43）Two V-arrangements of both sides position Block.
CN201710051232.3A 2017-01-23 2017-01-23 A kind of technique of accurate processing three-jaw ring flange Active CN106624660B (en)

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CN111390496B (en) * 2019-11-27 2022-04-26 山西平阳重工机械有限责任公司 T-shaped cylinder bottom machining process and clamp thereof

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JP3203317B2 (en) * 1998-03-20 2001-08-27 株式会社メタルアート Manufacturing method of hub flange for clutch
CN201744871U (en) * 2010-05-18 2011-02-16 安徽奇祥汽车零部件有限公司 Flange plate processing clamp
CN103381536A (en) * 2012-05-05 2013-11-06 王春晖 Processing technology of flange plate connected with high-pressure liquid output end of hydraulic cylinder
CN104014605B (en) * 2014-05-13 2016-06-15 盐城理研精密锻造有限公司 The equilateral reverse anti-extruding process of three-jaw flange sliding sleeve and reverse anti-extruding mold
KR101576949B1 (en) * 2014-12-02 2015-12-14 주식회사 베어링아트 Manufacturing method for outer ring of ball bearing and outer ring of ball bearing using the same
CN105563029A (en) * 2015-12-01 2016-05-11 陕西一品达石化有限公司 Machining method of flange

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