CN109014464A - A kind of wire cutting method of three-dimensional sheet metal part - Google Patents
A kind of wire cutting method of three-dimensional sheet metal part Download PDFInfo
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- CN109014464A CN109014464A CN201811135364.5A CN201811135364A CN109014464A CN 109014464 A CN109014464 A CN 109014464A CN 201811135364 A CN201811135364 A CN 201811135364A CN 109014464 A CN109014464 A CN 109014464A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
- B23H11/003—Mounting of workpieces, e.g. working-tables
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/4097—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using design data to control NC machines, e.g. CAD/CAM
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses a kind of wire cutting methods of three-dimensional sheet metal part, wire cutting process is formulated by production simple tooling fixture, in conjunction with sheet metal part three-dimensional figure, simple tooling makes support fixture according to section Internal periphery, using multiple groups flexible sucker retaining element, while establishing cutting coordinate system and obtaining contour line with sciagraphy and forming wire cutting path.Sheet metal part cutting track with three dimensional type face is two-dimentional cutting track once or several times by scheme transformation by the present invention, input wire cutting machine tool simultaneously cooperates specific frock clamp that cutting action can be completed, guarantee cut quality and efficiency while reducing cost in sheet metal part research and development trial-manufacturing process, is particularly suitable for the cutting forming of spy's small lot, preproduction workpiece.
Description
Technical field
The present invention relates to sheet metal part cutting field more particularly to a kind of wire cutting methods of three-dimensional sheet metal part.
Background technique
Sheet metal part is that sheet metal is processed by means such as punching press, bending, stretchings come in communications and transportation, aviation space
The every field such as boat, electronic apparatus, medical instrument, petrochemical industry, daily life have important application.And in aircraft, boat
It is complex-curved to obtain preferably streamlined in the application such as its device, deep-sea detecting, meet hydrodynamics and aerodynamic
Demand, stringent type face require to ensure that the important technologies index such as flying speed, running track or submerged depth of complete machine.
The last one manufacturing procedure for possessing the three-dimensional sheet metal part manufacturing of complex profile is cutting forming, existing industry
In common technical solution are as follows: high energy beam cut (laser, plasma), high pressure waterjet, Wire EDM.Three's cost is at passing
Subtract trend, high energy beam cutting is more suitable when batch is bigger, may also be combined with and accurately cuts in mechanical arm realization space, embodies best
Cost performance；Impact force is generated to part during high pressure waterjet, part cut place burr phenomena is more serious, while lathe needs
Water and sandblasting after collecting cutting, it is mating relatively large；Wire cutting is using electric spark principle, and the power generated to part can neglect
Slightly, process velocity is relatively slow, is suitble to small lot.The country is produced for the three-dimensional sheet metal part small lot for possessing complex profile,
Patent focuses primarily upon on the device of Three dimensional slots and is more suitable for the laser cutting produced in enormous quantities, such as
CN201721280085.9, CN201510538139.6 disclose a kind of Three dimensional slots device of mechanical transmission-type, preferably
The good characteristic of laser vector cutting is played, but laser is at high cost and the personnel qualifications write to machining locus are also high,
Certain heat affecting is generated to cut edge simultaneously.The high pressure water Three dimensional slots method provided in CN201410701674.4, hides
The design and manufacture for keeping away type supporting tool need very high requirement, and very poor to the versatility of small lot multiple types.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of three-dimensional metal plate for defect involved in background technique
The wire cutting method of metal parts.
The present invention uses following technical scheme to solve above-mentioned technical problem:
A kind of wire cutting method of three-dimensional sheet metal part comprising the steps of:
Step 1) obtains the CAD 3D figure and its forming mode of sheet metal part, if it is die forming is used, utilizes metal plate
The X0Y plane of the die joint building coordinate system of metal parts mold；If not die forming is used, the CAD of sheet metal part is analyzed
Three-dimensional figure, by sheet metal part concave surface it is most be held on horizontal plane downwards, with horizontal plane for X0Y plane；
Step 2) makees projection of the sheet metal part in X0Y plane, and the center of gravity for crossing the formed closed figure of projected outline is hung down
Two straight straight lines enable the straightway of two straight lines in contour line be referred to as long axis, short axle by length, enable short axle most short
When straight line where long axis be Y-axis, long axis midpoint be origin O, the length of long axis is l, cross Y-axis and make perpendicular to the flat of XOY plane
Face is YOZ plane, and crosses origin O and make perpendicular to X0Y plane, the plane of Y0Z plane to be X0Z plane, forms complete processing and sits
The outer surface intersection of mark system, XOY plane and sheet metal part is optimal round and smooth section line；
Step 3) makes according to the size of sheet metal part for sheet metal part to be fixed on wire electrode cutting bench
On frock clamp；
The frock clamp includes base rotating mechanism, Y-axis rotating mechanism, three supports and two sucker modules；
The base rotating mechanism includes firm banking, rotating platform, tapered roller bearing, the first locking nut and two
Limit bolt；
The upper surface of the firm banking is equipped with the fixed column vertical with its, which is provided with and first locking nut
The screw thread that inner ring screw thread matches；
The circular hole passed through for the fixed column is equipped at the center of the rotating platform, the rotating platform is covered described solid
It is connected on fixed column, by the tapered roller bearing with the firm banking, wherein the inner ring of tapered roller bearing and described solid
Fixed column is connected, the outer ring of tapered roller bearing and the rotating platform are connected, and enables the rotating platform around the fixation
Column is freely rotated；
The upper surface of the firm banking is equipped with about centrosymmetric first limit hole of fixed column, the second limit hole；
The rotating platform is equipped with the first limiting through hole corresponding with the first limit hole, the second limit hole on the firm banking, the
Two limiting through hole；Two limit bolts are for cooperating the first limit hole, the second limit hole, the first limiting through hole, the second limit
Position through-hole uses, so that the first limiting through hole of rotating platform and the first limit hole of fixed platform or the second limit hole are relatively solid
It is fixed；
First locking nut and the fixed column are threadedly coupled, for locking or unclamping the rotating platform and fixation
Pedestal；
The Y-axis rotating mechanism include the first to the second deep groove ball bearing, first to second bearing seat, rotary shaft, handwheel,
Second locking nut, angle instruction disk and pointer；
First, second bearing block is fixed on the rotating platform；
The both ends of the rotary shaft pass through the first, second deep groove ball bearing respectively and are arranged in first, second bearing block
On, rotary shaft is freely rotated；
Angle instruction disk center is equipped with the through-hole passed through for rotary shaft, covers in the rotary shaft close to first bearing seat
One end outside and the concentric rotation axis and with the first bearing seat be connected, which is provided with angle index；
The root of the pointer covers in rotary shaft close to one end of first bearing seat and is connected with rotary shaft, and orientation angle refers to
Show the angle index on disk, for characterizing the rotation angle of rotary shaft；
The shaft of the handwheel and the rotary shaft are connected close to one end of first bearing seat, for driving rotary shaft to revolve
Turn；
The rotary shaft is equipped with close to one end of second bearing seat and the second locking nut inner ring screw thread matches
Screw thread is connected with the second locking nut screw thread；
Second locking nut is used for and the second bearing seat matches to lock or unclamp the rotary shaft；
The sucker module includes sucker stand and several vacuum chucks for being uniformly arranged on sucker stand upper end；
It is described three support, two sucker stands bottom be fixed in the rotary shaft, wherein described three
Support is for holding up metal plate blank, and described two sucker modules are for being sucked three metal plate blank, cooperation supports to metal plate
Golden blank is fixed.
Step 4) carries out pair frock clamp with wire cutting silk by frock clamp on the workbench of wire cutting machine tool
Knife, the coordinate system of unified blank and clamps on wire cutting machine tool；
Metal plate blank is placed on frock clamp, so that three profiles of metal plate blank lower surface and three supports
Line is bonded completely, while making two groups of eight vacuum chucks that metal plate blank be sucked；
Step 5) creates datum level and projecting function using three-dimensional software, makees three-dimensional sheet metal part in the profile of X0Y plane
Projection is observed and whether there is cross spider in sheet metal part outline projection；
Step 5.1), cross spider, imports contour line directly into wire cutting machine tool software and is cut into for path if it does not exist
Three-dimensional sheet metal part, to smooth, cleaning part terminates polishing cut surface；
Step 5.2), cross spider if it exists:
Step 5.2.1), in three-dimensional software, crosses the building of coordinate system Y-axis and X0Y plane counter clockwise direction angle is ai9
A projection plane, ai=i × 10 °, i are the natural number for being less than or equal to 9 more than or equal to 1；
Step 5.2.2), profile of the three-dimensional sheet metal part on 9 projection planes is obtained using the projecting function of software and is thrown
Shadow；
Step 5.2.3), it observes in the outline projection on 9 projection planes with the presence or absence of cross spider:
Step 5.2.3.1), do not have retiform outline projection if it exists, it is any that a width is selected not have retiform profile
Projection makes the metal plate hair fixed by handwheel rotary tooling fixture using its corresponding projection plane as cutting datum level
The corresponding cutting datum level of blank imports outline projection of the three-dimensional sheet metal part on cutting datum level, is according to this path to three-dimensional
Sheet metal part is cut, and to smooth, clean three-dimensional sheet metal part terminates polishing cut surface；
Step 5.2.3.2), if there is cross spider in outline projection on 9 projection planes:
Step 5.2.3.2.1), the corresponding projection plane of the smallest outline projection of intersection area is chosen as initial projections
Face, to fix metal plate blank and corresponds to initial projections face by handwheel rotary tooling fixture, chooses the outermost of cross spider
The closed contour of composition is cutting path, completes to cut for the first time；
Step 5.2.3.2.2), enable in the outline projection in initial projections face there are the regional area of cross spider be region A,
8 projection planes except initial projections face and choose in any region A that there is no intersect in the outline projection of original X0Y plane
The outline projection of line passes through handwheel rotary tooling using its corresponding projection plane as the reprojection face for carrying out region A cutting
Fixture to fix metal plate blank and corresponds to reprojection face, imports profile of the three-dimensional sheet metal part on reprojection face and throws
Shadow is cut according to this for region A of the path to three-dimensional sheet metal part；
Step 5.2.3.2.3), to smooth, clean three-dimensional sheet metal part terminates polishing cut surface.
As a kind of further prioritization scheme of wire cutting method of three-dimensional sheet metal part of the present invention, three in the step 3)
A support and two sucker stands it is specific the production method is as follows:
Step 3.1) is cutd open using the first to the 5th plane to three-dimensional sheet metal part model in Three-dimensional CAD Software
Face, the described first to the 5th plane are arranged successively along Y-axis, are parallel to each other, wherein third plane be X0Z plane, the first plane,
The distance between 5th plane and third plane are m, andBetween second plane, fourth plane and third plane
Distance be
Step 3.2), inner profile curve obtained by being cutd open according to first, third, the 5th plane, wire cutting steel plate production three
A support；
Step 3.3), inner profile curve obtained by being cutd open according to second, fourth plane, wire cutting steel plate make two suckers
Bracket.
As a kind of further prioritization scheme of wire cutting method of three-dimensional sheet metal part of the present invention, in the sucker module
The quantity of vacuum chuck is 4.
As a kind of further prioritization scheme of wire cutting method of three-dimensional sheet metal part of the present invention, the vacuum chuck is equal
Using the NBR rubber vacuum chuck of diameter 20mm, vacuum degree is -0.5Pa.
It is right in the step 5) as a kind of further prioritization scheme of wire cutting method of three-dimensional sheet metal part of the present invention
When closed contour is cut, the specific steps are as follows:
Step A), closed contour is divided into two sections by the projection line using optimal round and smooth section line in projection plane, by one
Section contour line lengthens preset distance threshold combination feed, withdrawing path constitutes path A, another section of contour line is lengthened preset
Distance threshold combination feed, withdrawing path constitute path B；
Step B) so that rotating platform and firm banking are locked, and the first limiting through hole and fixed platform of rotating platform
The first limit hole is relatively fixed, the second limit hole of the second limiting through hole of rotating platform and fixed platform is relatively fixed, adopt
It is cut with path A；
Step C) so that rotating platform and firm banking are locked, and the first limiting through hole and fixed platform of rotating platform
The second limit hole is relatively fixed, the first limit hole of the second limiting through hole of rotating platform and fixed platform is relatively fixed, adopt
It is cut with path B.
As a kind of further prioritization scheme of wire cutting method of three-dimensional sheet metal part of the present invention, the preset distance
Threshold value is 2mm.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
1. the design of frock clamp be simple to manufacture it is convenient, to the complex three-dimensional metal plate for meeting linear cutting equipment impulse stroke
Part has a good versatility, while the assembly of frock clamp and very simple using operation, in conjunction with the line of high efficiency, low cost
Cutting technique greatly reduces the complex three-dimensional sheet metal part manufacturing cost of special small lot and trial-production period in research and development trial-manufacturing process.
2. using a plurality of inner outline support realize blank accurate positioning, and by vacuum chuck adsorbent parts to
Have the function that retaining element.Vacuum chuck solves the nonmagnetic material such as aluminium and aluminium alloy, stainless steel, titanium or titanium alloy
Sheet metal part be difficult to fixed problem, lossless realizes to complex three-dimensional metal plate blank precision clamping.
3. realizing the conversion of three-D profile and two-dimentional cutting path, unified coordinate system using the projecting function of three-dimensional software
In the case where, the cutting forming of complex three-dimensional sheet metal part is realized with easy and low cost step.Compared to existing complexity
Three-dimensional sheet metal part is cut and formed technology, and the present invention guarantees cutting while reducing special small lot part cost in research and development trial-manufacturing process
Quality and efficiency, the method can be used as the new method of complex three-dimensional sheet metal part cutting forming.
Detailed description of the invention
Fig. 1 is implementation flow chart of the invention；
Fig. 2 (a) is the building schematic diagram of three-dimensional sheet metal part coordinate system, and Fig. 2 (b) is three-dimensional sheet metal part in X0Y plane
Perspective view；
Fig. 3 (a) is the structural schematic diagram of frock clamp three supports in the present invention, two sucker stands, and Fig. 3 (b) is work
The front view of clamps, Fig. 3 (c) are the top view of frock clamp, and Fig. 3 (d) is the structural schematic diagram of frock clamp；
Fig. 4 (a) is the schematic diagram of 0 ° of assembly between rotating platform and firm banking in the present invention, and Fig. 4 (b) is rotating platform
The schematic diagram of 180 ° of assembly between firm banking；
Fig. 5 is 9 projection plane schematic diagrames in the present invention；
Fig. 6 is the schematic diagram that closed contour is converted into cutting path in the present invention；
Fig. 7 (a) is the coordinate system schematic diagram of second of case study on implementation of the invention；Fig. 7 (b) is second of implementation case of the invention
Perspective view of the three-dimensional sheet metal part in X0Y plane in example；Fig. 7 (c) is that the projection of second of case study on implementation of the present invention intersects
Line schematic diagram；Fig. 7 (d) is the regional area cutting path schematic diagram of second of case study on implementation of the invention；
In figure, 21- three-dimensional sheet metal part, 22-XOY plane, 23-YOZ plane, the optimal round and smooth section line of 24-, 25- three-dimensional
Sheet metal part is in XOY plane contour projection, projection straight line section (i.e. Y-axis) of the optimal round and smooth section line of 26- on XOY plane,
27-XOZ plane, 311- simple support, 312- sucker stand, 321- bearing base, 322- deep groove ball bearing, 323- rotary shaft,
324- angle display unit, the second locking nut of 325-, 326- handwheel, 327- rotating platform, 331- tapered roller bearing, 332-
Firm banking, 333- lathe universal mount, the first locking nut of 334-, 335- limit bolt, 341- reference for installation seat, 342- are true
Suction disk, 61- withdrawing path, 62- play cutter track diameter, the path 63- A, 64- path B, (i.e. second of the implementation of the present invention of 71- horizontal plane
XOY plane in case), the optimal round and smooth section line in 72- second of case study on implementation of the present invention, second of the 73- present invention is real
The YOZ plane in case is applied, contour projection of the three-dimensional metal plate in XOY plane, 75- in 74- second of case study on implementation of the present invention
Projection straight line section of the optimal round and smooth section line in XOY plane, second of implementation of the 76- present invention in second of case study on implementation of the invention
XOZ plane in case, 77- the present invention second of case study on implementation in the smallest region A of contour projection intersection area, 771- sheet
Local configuration line in second of case study on implementation is invented, the cutting path of regional area A in 772- second of case study on implementation of the present invention.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing:
The present invention can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein.On the contrary,
It is thorough and complete to these embodiments are provided so that the disclosure, and model of the invention will be given full expression to those skilled in the art
It encloses.In the accompanying drawings, for the sake of clarity it is exaggerated component.
Embodiment 1: the present invention is to provide a kind of simple and convenient wire cutting solution, while providing a kind of easy
Fixture Design method.This hair is discussed in detail as shown in Figure 1, below by taking alloy complex three-dimensional sheet metal part 21 as an example in its process
Bright implementation steps.
Step 1: obtaining the CAD 3D figure and its forming mode of three-dimensional sheet metal part, this part uses mold hot forming, benefit
With the X0Y plane 22 of the die joint building coordinate system of three-dimensional sheet metal part mold；
Step 2: such as Fig. 2 (a), making projection of the three-dimensional sheet metal part in X0Y plane 22, cross projected outline 25 and form envelope
The center of gravity for closing figure makees two vertical straight lines, and the straightway of two straight lines in contour line is enabled to be referred to as length by length
Axis, short axle, enable short axle most in short-term straight line where long axis be Y-axis, long axis midpoint be origin O, the length of long axis is 632mm, cross Y
Axis is made to be YOZ plane 23 perpendicular to the plane of XOY plane 22, and crosses origin O work perpendicular to the plane of X0Y plane, Y0Z plane and be
X0Z plane 27 forms the complete Cutter coordinate system as shown in Fig. 2 (b).The intersection of XOY plane and sheet metal part is most simultaneously
Excellent round and smooth section line 24；
Step 3) determines rotation shaft size 620mm × 50mm × 50mm according to the size of sheet metal part, according to Fig. 3
(b), signal in Fig. 3 (c), makes the frock clamp for being fixed on sheet metal part on wire electrode cutting bench.Tooling folder
Tool includes base rotating mechanism, Y-axis rotating mechanism, three supports, two sucker stands and two groups of vacuum chucks；
Base rotating mechanism includes firm banking 332, rotating platform 327, tapered roller bearing 331, the first locking nut
334 and two limit bolts 335；The base rotating mechanism for realizing that 180 ° of converting means of pedestal are matched then relies on tapered roller bearing 331
Realize the rotation of rotating platform 327, firm banking 332 is connected by screw on lathe universal mount 333, limit bolt 335
Realize that precise positioning, the first locking nut 334 realize the locked and release of rotating platform and firm banking.
Y-axis rotating mechanism includes the one the second deep groove ball bearings 322, first to second bearing seat 321, rotary shaft 323, hand
Take turns the angle display unit 324 of the 326, second locking nut 325, angle instruction disk and pointer composition；A pair of of deep-groove ball will be utilized
Bearing 322 assembles rotary shaft 323 in the first second bearing seat, and the rotation of Y-axis is realized by rotation hand wheel 326, and distinguishes
The angle display unit 324 of angle instruction disk composition on the pointer and bearing block 321 being fixed in rotary shaft 323 is precisely shown
Angle is rotated, the second locking nut 325 realizes the fixation of rotation angle.
Using being parallel to five planes (from left to right to its 1-5 number) of X0Z plane to three-dimensional in Three-dimensional CAD Software
Sheet metal part model carries out section, chooses close to XOY plane side for two curves above and below section as inner profile curve.Root
Inner profile curve obtained by cuing open according to 1,3,5 planes makes three simple supports, according to three inner profile curve designs among the above
And wire cutting 1mm steel plate makes three simple supports 311, wherein 3 planes are X0Z plane and 1,5 planes are distance X0Z plane etc.
Away from the parallel plane for 180mm, meet 158mm≤m≤210.7mm；The production of inner profile curve obtained by being cutd open according to 2,4 planes
Vacuum chuck bracket, 2,4 planes be with the two Parallel Symmetric planes that X0Z plane systematic is 158mm, and according to this two planes and
The obtained design of two inner profile curves and wire cutting 1mm steel plate production vacuum chuck bracket 312, as shown in Fig. 3 (a).Three
Simple support, two sucker stands are connected on the rotary shaft by reference for installation seat, and the NBR rubber vacuum of eight diameter 20mm is inhaled
Disk is fixed on sucker stand, and assembly is finished as shown in Fig. 3 (d).
Step 4) carries out pair frock clamp with wire cutting silk by frock clamp on the workbench of wire cutting machine tool
Knife, adjustment Universal base 333 determines that the rotary shaft 323 of frock clamp is parallel with lathe Y-axis, and determines the cuboid section of rotary shaft
Origin position, the coordinate system of unified blank and clamps on wire cutting machine tool；Blank is placed on frock clamp, so that
Three contour lines that blank lower surface is supported with three are bonded completely, and adjustment vacuum degree is -0.5Pa and opens vacuum chuck
Control switch, blank are fixed.
Step 5) fixes blank by Fig. 4 (a), creates datum level and projecting function using three-dimensional software, makees three-dimensional metal plate
Metal parts are observed in sheet metal part outline projection in the outline projection of X0Y plane without cross spider.According to Fig. 6, optimal round and smooth section
Closed contour is divided into two sections in the Projection Line Segment of projection plane by line, and two sections of contour lines are lengthened preset distance threshold 2mm
63 path A and 64 path B are respectively constituted in conjunction with feed path 62 and withdrawing path 61；Being in 0 ° of assembly in rotating platform is Fig. 4
(a) wire cutting is completed using path A when state shown in, unclamp the first locking nut 334 and removes limit bolt 335, is adjusted
When state shown in rotating platform to 180 ° of assembled state, that is, Fig. 4 (b), the first locking nut 334 and installation limit bolt are tightened
335, the cutting of the blank profile other side is completed using path B, the cut surface for parts profile line of polishing cleans part to smooth
Terminate and exits cutting task.
Embodiment 2: the present invention is to provide a kind of simple and convenient wire cutting solution, while providing a kind of easy
Fixture Design method.Its process is situated between in detail as shown in Figure 1, below by taking the alloy complex 3 d part 21 manufactured experimently in Fig. 2 as an example
Continue implementation steps of the invention.
Step 1: consulting product side, this part forming mode is unknown, and without CAD 3D figure, template part is shelved horizontal plane
On, using CAD software figure needed for the building of 3D scanner scanning template part, at the same it is flat with the X0Y that horizontal plane 71 constructs coordinate system
Face；
Step 2: such as Fig. 7 (a), making projection of the three-dimensional sheet metal part in X0Y plane 71, cross projected outline 74 and form envelope
The center of gravity for closing figure makees two vertical straight lines, and the straightway of two straight lines in contour line is enabled to be referred to as length by length
Axis, short axle, enable short axle most in short-term straight line where long axis be Y-axis, long axis midpoint be origin O, the length of long axis is 524mm, cross Y
Axis is made to be YOZ plane 73 perpendicular to the plane of XOY plane 71, and crosses origin O work perpendicular to the plane of X0Y plane, Y0Z plane and be
X0Z plane 76 forms the complete Cutter coordinate system as shown in Fig. 7 (b).The intersection of XOY plane and sheet metal part is most simultaneously
Excellent round and smooth section line 72；
Step 3: rotation shaft size 620mm × 50mm × 50mm being determined according to the size of sheet metal part, according to Fig. 3
(b), signal in Fig. 3 (c), makes the frock clamp for being fixed on sheet metal part on wire electrode cutting bench.Tooling folder
Tool includes base rotating mechanism, Y-axis rotating mechanism, three supports, two sucker stands and two groups of vacuum chucks；
Base rotating mechanism includes firm banking 332, rotating platform 327, tapered roller bearing 331, the first locking nut
334 and two limit bolts 335；The base rotating mechanism for realizing that 180 ° of converting means of pedestal are matched then relies on tapered roller bearing 331
Realize the rotation of rotating platform 327, firm banking 332 is connected by screw on lathe universal mount 333, limit bolt 335
Realize that precise positioning, the first locking nut 334 realize the locked and release of rotating platform and firm banking.
Y-axis rotating mechanism includes the one the second deep groove ball bearings 322, first to second bearing seat 321, rotary shaft 323, hand
Take turns the angle display unit 324 of the 326, second locking nut 325, angle instruction disk and pointer composition；A pair of of deep-groove ball will be utilized
Bearing 322 assembles rotary shaft 323 in the first second bearing seat, and the rotation of Y-axis is realized by rotation hand wheel 326, and distinguishes
The angle display unit 324 of angle instruction disk composition on the pointer and bearing block 321 being fixed in rotary shaft 323 is precisely shown
Angle is rotated, the second locking nut 325 realizes the fixation of rotation angle.
Using being parallel to five planes (from left to right to its 1-5 number) of X0Z plane to three-dimensional in Three-dimensional CAD Software
Sheet metal part model carries out section, chooses close to XOY plane side for two curves above and below section as inner profile curve.Root
Inner profile curve obtained by cuing open according to 1,3,5 planes makes three simple supports, according to three inner profile curve designs among the above
And wire cutting 1mm steel plate makes three simple supports 311, wherein 3 planes are X0Z plane and 1,5 planes are distance X0Z plane etc.
Away from the parallel plane for 150mm, meet 131mm≤m≤174.7mm；2,4 planes are and that X0Z plane systematic is 131mm is two flat
Row symmetrical plane, and two inner profile curve designs and wire cutting 1mm steel plate production vacuum according to obtained from this two planes
Sucker stand 312, as shown in Fig. 3 (a).Three simple supports, two sucker stands are connected in rotary shaft by reference for installation seat
On, the NBR rubber vacuum chuck of eight diameter 20mm is fixed on sucker stand, and assembly is finished as shown in Fig. 3 (d).
Step 4 on the workbench of wire cutting machine tool, carries out frock clamp to frock clamp to knife with wire cutting silk,
It adjusts Universal base 333 and determines that the rotary shaft 323 of frock clamp is parallel with lathe Y-axis, and determine that the cuboid section of rotary shaft is former
Point position, the coordinate system of unified blank and clamps on wire cutting machine tool；Blank is placed on frock clamp, so that hair
Three contour lines that blank lower surface is supported with three are bonded completely, and adjustment vacuum degree is -0.5Pa and opens the control of vacuum chuck
System switch, blank are fixed.
Step 5: fixing blank by Fig. 4 (a), create datum level and projecting function using three-dimensional software, make three-dimensional metal plate
Metal parts are in the outline projection of X0Y plane, and observing in outline projection has cross spider, as shown in Fig. 7 (c).
Step 6: crossing Y-axis building according to Fig. 5 and X0Y plane counter clockwise direction angle is ai9 plane (ai=i × 10 °,
I is the natural number for being less than or equal to 9 more than or equal to 1), with the presence of cross spider in 9 outline projections, and 77 face of cross spider region
The smallest projection plane when being 0 ° of product, selects the outermost composition closed contour of projection line.According to Fig. 6, optimal round and smooth section
Closed contour is divided into two sections in the Projection Line Segment of projection plane by line, and two sections of contour lines are lengthened preset distance threshold 2mm
63 path A and 64 path B are respectively constituted in conjunction with feed path 62 and withdrawing path 61；Scheme when rotating platform is in 0 ° of assembly
Wire cutting is completed using path A when state shown in 4 (a), unclamp the first locking nut 334 and removes limit bolt 335, is adjusted
Assembled state when state shown in rotating platform to 180 ° i.e. Fig. 4 (b) tightens the first locking nut 334 and installation limit bolt
335, the cutting of the blank profile other side is completed using path B.
Step 7: for there are the regional area A of cross spider, in 8 projection planes except initial projections face and original
A is found in the outline projection of X0Y planeiPlane corresponding regional area A projected outline at=20 ° exists without cross spider,
Partial projection is done to three-dimensional sheet metal part using this plane as perspective plane in three-dimensional software, obtains local configuration line 771, this part wheel
Profile both ends lengthen 2mm and cutting point, withdrawing point are combined to constitute cutting path 772, as shown in Fig. 7 (d).Simultaneously by handwheel with
20 ° of angle rotate clockwise rotary shaft 323, the blank on frock clamp are fixed by the second locking nut, in conjunction with cutting
The cutting of the completion of path 772 regional area A.
Step 8: to smooth, cleaning part terminates and exits cutting task the cut surface of polishing parts profile line.
Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skill
Art term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Also
It should be understood that those terms such as defined in the general dictionary should be understood that have in the context of the prior art
The consistent meaning of meaning will not be explained in an idealized or overly formal meaning and unless defined as here.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not limited to this hair the foregoing is merely a specific embodiment of the invention
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (6)
1. a kind of wire cutting method of three-dimensional sheet metal part, which is characterized in that comprise the steps of:
Step 1) obtains the CAD 3D figure and its forming mode of sheet metal part, if it is die forming is used, utilizes metal plate zero
The X0Y plane of the die joint building coordinate system of part mold；If not die forming is used, the CAD 3D of sheet metal part is analyzed
Figure, by sheet metal part concave surface it is most be held on horizontal plane downwards, with horizontal plane for X0Y plane；
Step 2) makees projection of the sheet metal part in X0Y plane, and the center of gravity for crossing the formed closed figure of projected outline is made vertically
Two straight lines enable the straightway of two straight lines in contour line be referred to as long axis, short axle by length, short axle are enabled most to grow in short-term
Straight line where axis be Y-axis, long axis midpoint be origin O, the length of long axis is l, cross Y-axis and make and be perpendicular to the plane of XOY plane
YOZ plane, and cross origin O and make perpendicular to X0Y plane, the plane of Y0Z plane to be X0Z plane, complete Cutter coordinate system is formed,
The outer surface intersection of XOY plane and sheet metal part is optimal round and smooth section line；
Step 3) makes according to the size of sheet metal part for sheet metal part to be fixed on wire electrode cutting bench
Frock clamp；
The frock clamp includes base rotating mechanism, Y-axis rotating mechanism, three supports and two sucker modules；
The base rotating mechanism includes firm banking, rotating platform, tapered roller bearing, the first locking nut and two limits
Bolt；
The upper surface of the firm banking is equipped with the fixed column vertical with its, which is provided with and the first locking nut inner ring
The screw thread that screw thread matches；
The circular hole passed through for the fixed column is equipped at the center of the rotating platform, the rotating platform is covered in the fixed column
Above, it is connected by the tapered roller bearing with the firm banking, wherein the inner ring of tapered roller bearing and the fixed column
Be connected, the outer ring of tapered roller bearing and the rotating platform are connected, enable the rotating platform around the fixed column from
By rotating；
The upper surface of the firm banking is equipped with about centrosymmetric first limit hole of fixed column, the second limit hole；It is described
Rotating platform is equipped with the first limiting through hole corresponding with the first limit hole, the second limit hole on the firm banking, the second limit
Position through-hole；Two limit bolts are logical for cooperating the first limit hole, the second limit hole, the first limiting through hole, the second limit
Hole uses, so that the first limiting through hole of rotating platform and the first limit hole of fixed platform or the second limit hole are relatively fixed；
First locking nut and the fixed column are threadedly coupled, for locking or unclamping the rotating platform and fixed bottom
Seat；
The Y-axis rotating mechanism includes the first to the second deep groove ball bearing, first to second bearing seat, rotary shaft, handwheel, second
Locking nut, angle instruction disk and pointer；
First, second bearing block is fixed on the rotating platform；
The both ends of the rotary shaft pass through the first, second deep groove ball bearing respectively and are arranged on first, second bearing block, make
Obtaining rotary shaft can be freely rotated；
Angle instruction disk center is equipped with the through-hole passed through for rotary shaft, covers one in the rotary shaft close to first bearing seat
It holds the outer and described concentric rotation axis and is connected with the first bearing seat, which is provided with angle index；
The root of the pointer covers in rotary shaft close to one end of first bearing seat and is connected with rotary shaft, and orientation angle indicates disk
On angle index, for characterizing the rotation angle of rotary shaft；
The shaft of the handwheel and the rotary shaft are connected close to one end of first bearing seat, for driving rotary shaft to rotate；
The screw thread that the rotary shaft is equipped with close to one end of second bearing seat and the second locking nut inner ring screw thread matches,
It is connected with the second locking nut screw thread；
Second locking nut is used for and the second bearing seat matches to lock or unclamp the rotary shaft；
The sucker module includes sucker stand and several vacuum chucks for being uniformly arranged on sucker stand upper end；
It is described three support, two sucker stands bottom be fixed in the rotary shaft, wherein it is described three support
For holding up metal plate blank, described two sucker modules are for being sucked three metal plate blank, cooperation supports to metal plate hair
Blank is fixed.
Step 4) carries out to knife, system frock clamp with wire cutting silk by frock clamp on the workbench of wire cutting machine tool
The coordinate system of clamps on one blank and wire cutting machine tool；
Metal plate blank is placed on frock clamp, so that three contour lines that metal plate blank lower surface is supported with three are complete
Full fitting, while making two groups of eight vacuum chucks that metal plate blank be sucked；
Step 5) creates datum level and projecting function using three-dimensional software, makees three-dimensional sheet metal part and throws in the profile of X0Y plane
Shadow is observed and whether there is cross spider in sheet metal part outline projection；
Step 5.1), cross spider, imports contour line directly into wire cutting machine tool software and is cut into three-dimensional for path if it does not exist
Sheet metal part, to smooth, cleaning part terminates polishing cut surface；
Step 5.2), cross spider if it exists:
Step 5.2.1), in three-dimensional software, crosses the building of coordinate system Y-axis and X0Y plane counter clockwise direction angle is ai9 throwing
Shadow plane, ai=i × 10 °, i are the natural number for being less than or equal to 9 more than or equal to 1；
Step 5.2.2), outline projection of the three-dimensional sheet metal part on 9 projection planes is obtained using the projecting function of software；
Step 5.2.3), it observes in the outline projection on 9 projection planes with the presence or absence of cross spider:
Step 5.2.3.1), do not have retiform outline projection if it exists, it is any that a width is selected not have retiform outline projection,
Using its corresponding projection plane as cutting datum level, the metal plate blank pair fixed is made by handwheel rotary tooling fixture
Datum level should be cut, outline projection of the three-dimensional sheet metal part on cutting datum level is imported, is according to this path to three-dimensional metal plate zero
Part is cut, and to smooth, clean three-dimensional sheet metal part terminates polishing cut surface；
Step 5.2.3.2), if there is cross spider in outline projection on 9 projection planes:
Step 5.2.3.2.1), the corresponding projection plane of the smallest outline projection of intersection area is chosen as initial projections face, is led to
It crosses handwheel rotary tooling fixture and to fix metal plate blank and correspond to initial projections face, choose what the outermost of cross spider was constituted
Closed contour is cutting path, completes to cut for the first time；
Step 5.2.3.2.2), enable in the outline projection in initial projections face there are the regional area of cross spider be region A, initial
8 projection planes except perspective plane and choose in any region A that there is no cross spiders in the outline projection of original X0Y plane
Outline projection passes through handwheel rotary tooling fixture using its corresponding projection plane as the reprojection face for carrying out region A cutting
So that fixing metal plate blank corresponds to reprojection face, outline projection of the three-dimensional sheet metal part on reprojection face is imported,
The region A of three-dimensional sheet metal part is cut for path according to this；
Step 5.2.3.2.3), to smooth, clean three-dimensional sheet metal part terminates polishing cut surface.
2. the wire cutting method of three-dimensional sheet metal part according to claim 1, which is characterized in that three in the step 3)
Support and two sucker stands it is specific the production method is as follows:
Step 3.1) carries out section, institute to three-dimensional sheet metal part model using the first to the 5th plane in Three-dimensional CAD Software
It states the first to the 5th plane to be arranged successively, be parallel to each other along Y-axis, wherein third plane is X0Z plane, the first plane, the 5th flat
The distance between face and third plane are m, andThe distance between second plane, fourth plane and third plane
It is
Step 3.2), inner profile curve obtained by being cutd open according to first, third, the 5th plane, wire cutting steel plate make three branch
Support；
Step 3.3), inner profile curve obtained by being cutd open according to second, fourth plane, wire cutting steel plate make two sucker branch
Frame.
3. the wire cutting method of three-dimensional sheet metal part according to claim 1, which is characterized in that true in the sucker module
The quantity of suction disk is 4.
4. the wire cutting method of three-dimensional sheet metal part according to claim 1, which is characterized in that the vacuum chuck is adopted
With the NBR rubber vacuum chuck of diameter 20mm, vacuum degree is -0.5Pa.
5. the wire cutting method of three-dimensional sheet metal part according to claim 1, which is characterized in that closing in the step 5)
When conjunction contour line is cut, the specific steps are as follows:
Step A), closed contour is divided into two sections by the projection line using optimal round and smooth section line in projection plane, and one section is taken turns
Profile lengthens preset distance threshold combination feed, withdrawing path constitutes path A, and another section of contour line is lengthened preset distance
Threshold value combination feed, withdrawing path constitute path B；
Step B) so that rotating platform and firm banking are locked, and the of the first limiting through hole of rotating platform and fixed platform
One limit hole is relatively fixed, the second limit hole of rotating platform the second limiting through hole and fixed platform is relatively fixed, using road
Diameter A is cut；
Step C) so that rotating platform and firm banking are locked, and the of the first limiting through hole of rotating platform and fixed platform
Two limit holes are relatively fixed, the first limit hole of rotating platform the second limiting through hole and fixed platform is relatively fixed, using road
Diameter B is cut.
6. the wire cutting method of three-dimensional sheet metal part according to claim 5, which is characterized in that described preset apart from threshold
Value is 2mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135364.5A CN109014464B (en) | 2018-09-28 | 2018-09-28 | Wire cutting method for three-dimensional sheet metal part |
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|---|---|---|---|
| CN201811135364.5A CN109014464B (en) | 2018-09-28 | 2018-09-28 | Wire cutting method for three-dimensional sheet metal part |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112051796A (en) * | 2020-08-14 | 2020-12-08 | 西安交通大学 | Planning method for generating shortest path by connecting two-dimensional random closed graphs |
| CN114227011A (en) * | 2021-12-31 | 2022-03-25 | 苏州铭尚精密钣金有限公司 | Production system for sheet metal part of artificial door lock of intelligent door lock |
| CN114713921A (en) * | 2021-01-05 | 2022-07-08 | 中国航发商用航空发动机有限责任公司 | Support removing tool and support removing method |
| CN114985857A (en) * | 2022-06-30 | 2022-09-02 | 青岛高测科技股份有限公司 | Wire cutting control method, wire cutting control device and wire cutting machine |
| CN115555803A (en) * | 2022-09-13 | 2023-01-03 | 中国电子科技集团公司第二十九研究所 | Processing method for parallel seal welding stainless steel enclosure frame |
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| CN115555803A (en) * | 2022-09-13 | 2023-01-03 | 中国电子科技集团公司第二十九研究所 | Processing method for parallel seal welding stainless steel enclosure frame |
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