CN105382313A

CN105382313A - Machining method for numerical control milling of thin-wall curved-surface irregular parts

Info

Publication number: CN105382313A
Application number: CN201510990462.7A
Authority: CN
Inventors: 闫飞宇; 马延枫; 宋鑫; 姚蕾; 曲中兴; 谢勇智; 刘强; 陈刚; 陈榕; 孟继东; 穆为迎; 刘琦; 苗金龙; 赵润辉; 张博; 王蕾; 田珍珠; 张立平; 张杨; 白文怡
Original assignee: Xian Aerospacemotor Machine Factory
Current assignee: Xian Aerospacemotor Machine Factory
Priority date: 2015-12-25
Filing date: 2015-12-25
Publication date: 2016-03-09
Anticipated expiration: 2035-12-25
Also published as: CN105382313B

Abstract

A machining method for numerical control milling of thin-wall curved-surface irregular parts aims at providing a technological scheme and a clamping method used in the machining process of the thin-walled curved-surface irregular parts. According to the machining method, an upper irregular curved-surface area and a lower irregular curved-surface area are divided in a blocked mode and technological clamping blocks are reserved by reasonably arranging the technological process and dividing a cutting area, positioning tools and rough and finish milling numerical control machining procedures are designed, and cutting tool selecting and cutting parameters are determined, linear cutting machining of the like products is replaced by milling machining, the machining cost is reduced, and the machining efficiency and product quality are improved.

Description

A kind of thin-wall curved-surface profiled piece numerical control milling method

Technical field

The present invention relates to field of machining, specifically a kind of thin-wall curved-surface profiled piece numerical control milling method.

Background technology

This part is one of most important parts of certain solid rocket motor case, when product final products use, plays a part carry, connection, and the crudy of workpiece directly affects the final performance of product.And this part journal stirrup spot size is final Assembly interface size, form and position tolerance and size tolerance requirements high.

This part belongs to thin-wall curved-surface profiled piece, workpiece is formed primarily of two parts: hanger part and thin-wall curved-surface part, hanger part can be considered as simple X-Y scheme stretching entity (see accompanying drawing 1); thin-wall curved-surface part is made up of upper lower surface camber; wall thickness is 6mm, and to be outside diameter be mo(u)ld bottom half curved surface arc surface, arc radius R375.Mo(u)ld top half curved surface is the biased arc surface of mo(u)ld bottom half curved surface, and is connected with hanger part by transition face, forms this thin-wall curved-surface profiled piece.

For such part, the technological method for processing of " spin upside down, acted as reference mutual ", the quality of raising product that can be maximum and working (machining) efficiency, but the hanger part of this part and thin-wall curved-surface part all can not by conventional clamping tools, such as pressing plate, vice and parallels, directly on workpiece, realize clamping, and unsuitable installation way easily causes, and positioning precision is poor, rigidity is not enough, process the problems such as chatter, therefore the clamping of part is the difficult problem that must solve.

The particularity of this Workpiece structure, the complexity of curved surface and higher required precision determine the design difficulty of its numerical control program.The design of numerical control program must coincide the clamping state of product and technical process.In addition, how selecting rational driven by program mode, cutting mode, machined parameters, is guarantee high-quality, efficiently to complete processing key.

The present invention is exactly the processing difficulties for the said goods, by the division to upper and lower special-shaped curved region, and reserved technique fixture block, the thick finish-milling nc program of Design Orientation frock and each region, the selection of cutter and the determination of cutting parameter, ensure that product quality, significantly improve production efficiency.

Summary of the invention

For overcoming the clamping difficulty utilizing prior art to exist in processing thin-walled Curved surface heterotype part, the deficiency that process is complicated, the present invention proposes a kind of thin-wall curved-surface profiled piece numerical control milling method.

Detailed process of the present invention is:

Step 1, processing and milling technique indent.The technique indent of level is gone out respectively in the both sides circumferential surface Milling Process of blank.The center line of this technique indent width is mutually vertical with the center line space of this blank.

Step 2, the upper profile of first piece.The mo(u)ld top half face of described workpiece to comprise in profile in profile on first, second, the 3rd profile, symmetrical surface and technique briquetting sidewall in profile, the 4th.The process of described milling mo(u)ld top half curved surface comprises the roughing of profile and fine finishining and retains the technique fixture block on upper profile top.

During milling, Machine tool pressure plate is pressed on the technique indent of blank both sides, this blank is fixed on machine tooling platform.

The detailed process of milling is:

I roughing technique briquetting sidewall: the cutter selected in roughing is Ф 100 carbide end mill.The parameter of processing is: machine spindle speed is 600r/min, and the amount of feeding is 1200mm/min, and cutting depth is 1mm.Axial stratification along blank cuts, and makes every layer of cutting depth equal, until be machined to the symmetrical surface of thin-wall curved-surface shaped piece.

II roughing symmetrical surface: the roughing of described symmetrical surface is completed by a cutting lay.Detailed process is: by tool motion to starting point, opens dynamic triaxial Milling Machining center and starts to carry out machining along the circumference of blank.After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; After cutter is gone around again and again got back to starting point, control cutter and again cut step pitch to the central motion one of blank, continue to carry out machining to blank surface.The process of step pitch, machining is cut in motion described in repetition, is machined to the edge of symmetrical surface.Complete the roughing of symmetrical surface.Described one is cut step pitch is the tool diameter of 35%.

Profile in III roughing.In described roughing, profile adopts the mode of layered cutting, and makes every layer of cutting depth equal;

A) profile in profile and the 4th is processed on second in described mo(u)ld top half face in profile, the 3rd.Profile and the 4th need leaving profile, the 3rd on second the allowance for finish of 0.5mm described in roughing during profile.Until complete the roughing to profile in profile and the 4th in profile, the 3rd on described second by technological requirement.

B) profile on first in described mo(u)ld top half face is processed.

Add man-hour, by tool motion to starting point, open dynamic triaxial Milling Machining center and start to carry out machining along the circumference of blank, after cutter is gone around and got back to starting point, control central motion one the cutting step pitch of cutter to blank, continue to carry out machining to blank surface; After cutter is gone around again and again got back to starting point, control cutter and again cut step pitch to the central motion one of blank, continue to carry out machining to blank surface.Until complete the roughing to profile on described first by technological requirement, obtain the semi-finished product of described thin-wall curved-surface shaped piece.Described one is cut step pitch is the tool diameter of 35%.

Described layered cutting is:

Process the first cutting lay.Cutter is using the central point of technique briquetting upper surface as the initial point of coordinate system.By tool motion to blank top surface edge place.Open dynamic triaxial Milling Machining center to start to carry out machining along the circumference of blank.After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; The process of step pitch, machining is cut in motion described in repetition, is machined to the edge of technique briquetting.Described one is cut step pitch is the tool diameter of 35%.

When being machined to the edge of technique briquetting, the machining path of adjustment cutter, makes cutter cut along the profile of this technique briquetting.Complete the processing of the first cutting lay.Starting point got back to by cutter.Control cutter to move a cutting depth along the negative direction of coordinate system Z axis.Repeat the process of described processing first cutting lay, until be machined to the symmetrical surface of thin-wall curved-surface shaped piece.

Step 3, the upper profile of finishing workpiece.

The cutter selected in fine finishining is Ф 20 carbide alloy bulb milling cutter.Axial stratification along blank cuts, and makes every layer of cutting depth equal.The cutting depth of every layer is 0.3mm.The parameter of processing is: machine spindle speed is 3000r/min, and the amount of feeding is 2400mm/min, and cutting depth is 0.3mm.

The upper profile of described finishing workpiece is the processing to profile in profile and the 4th in profile, the 3rd in profile, second on first in upper profile.When fine finishining, cutter is from the inside feed of the outer rim of workpiece.If the starting point A of cutter is in 9 directions of workpiece, and is positioned on the edge of profile on first, adopt the mode of layered cutting first to process profile on first, then to process on second in profile, the 3rd profile in profile and the 4th simultaneously.

In the mode fine finishining of described employing layered cutting, the detailed process of profile is:

The processing of profile on first: add man-hour, by tool motion to starting point A, opens dynamic triaxial Milling Machining center and starts to carry out machining along half-finished circumference of thin-wall curved-surface shaped piece by the parameter of setting.After cutter is gone around and got back to starting point A, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to the surface of semi-finished of described thin-wall curved-surface shaped piece; Until the Z-direction plane being machined to this cutting lay place respectively with second on the profile that forms of in profile and the 4th, profile is formed in profile, the 3rd intersecting lens, control cutter along this contour motion, complete the processing of profile on first.Described one is cut step pitch is the tool diameter of 10%.

The processing of profile in profile and the 4th in profile, the 3rd on second: cutter to move 0.3mm respectively along the positive direction of coordinate system Z axis and the positive direction of X-axis, make cutter be in 9 directions of workpiece the 4th on the edge of profile, fine finishining is carried out to profile in profile and the 4th in profile, the 3rd on second.Add man-hour, cutter is along the outline clockwise movement of profile in profile and the 4th in profile, the 3rd on described second.First cutter moves along profile Y direction on the 4th distance of 1/2 the 4th mo(u)ld top half face width degree, completes the processing of 1/2 of described 4th mo(u)ld top half face width degree.Adjustment cutter movement locus be camber line, to be in fourth quadrant second on profile carry out machining.When tool motion is to this intersection of profile in profile and the 3rd on second, the movement locus of adjustment cutter is straight line, to be in workpiece 12 directions the 3rd on profile carry out machining.When tool motion to the 3rd on profile be in first quartile second on the intersection of profile, the movement locus of adjustment cutter is camber line, to this on second profile carry out machining.When tool motion is to this intersection of profile in profile and the 4th on second, the movement locus of adjustment cutter is straight line, to be in workpiece 3 directions the 4th on profile carry out machining.When tool motion to the 4th on profile be in the second quadrant second on the intersection of profile, the movement locus of adjustment cutter is camber line, to be in the second quadrant second on profile carry out machining.When tool motion is to this profile and the intersection being in profile on workpiece 6 directions the 3rd on second, the movement locus of adjustment cutter is straight line, carries out machining to profile on the described 3rd.When tool motion to the 3rd on profile be in third quadrant second on the intersection of profile, the movement locus of adjustment cutter is camber line, carries out machining to profile on described second.When tool motion to this on second profile be in workpiece 9 directions the 4th on the intersection of profile, the movement locus of adjustment cutter is straight line, carries out machining to remaining 1/2 straightway of profile on the described 4th.Complete the fine finishining to profile first in profile and the 4th in profile, the 3rd on second time.

Cutter to move 0.3mm respectively along the positive direction of coordinate system Z axis and the positive direction of X-axis, make cutter be in 9 directions of workpiece the 4th on the edge of profile 4, continue to carry out fine finishining to profile in profile and the 4th in profile, the 3rd on second according to the accurately machined process of described first passage.Until be machined to the edge of symmetrical surface.

So far, the fine finishining to profile in profile and the 4th in profile, the 3rd in profile, second on first is completed.

Step 4, milling mo(u)ld bottom half curved surface.Described milling mo(u)ld bottom half curved surface is by the technique briquetting clamping of thin-wall curved-surface shaped piece in machine tool accessories vice, adopts the mode of layering processing to carry out roughing and fine finishining to described thin-wall curved-surface shaped piece mo(u)ld bottom half curved surface.

I roughing mo(u)ld bottom half curved surface: the cutter selected in roughing is Ф 100 carbide end mill, and leaves the chipping allowance of 0.5mm.The parameter of processing is: machine spindle speed is 600r/min, and the amount of feeding is 1200mm/min, and cutting depth is 1mm.

The movement locus on each cutting lay of cutter is: cutter with C point for starting point, and along the vector motion that E point and B point are formed, until move to beyond parts profile.Then move one to the direction of D and cut step-length, along the vector counter motion that E point and B point are formed, until move to beyond parts profile, so circulation is directly processed to D point.Cutter cutting endless form is on each layer identical therewith, and after the processing finishing a cutting lay, cutter retreats to safety zone, and feed forms new cutting lay again, and so circulation is directly processed to the size of roughing requirement.

Described B point is positioned at the edge in described mo(u)ld bottom half curved surface 6 directions; Described E point is positioned at the edge in described mo(u)ld bottom half curved surface 12 directions; Described C point is positioned at the edge in described mo(u)ld bottom half curved surface 9 directions; Described D point is positioned at the edge in described mo(u)ld bottom half curved surface 3 directions.According to design, the cross section of this mo(u)ld bottom half curved surface is arc; Described C point and D point lay respectively at two tops of arc, and the axial height on thin-wall curved-surface shaped piece is the highest; Described C point and D is point-symmetric is distributed at the bottom of the arc of mo(u)ld bottom half curved surface, the axial height on thin-wall curved-surface shaped piece is minimum.

In step 4, the detailed process of roughing mo(u)ld bottom half curved surface is:

Any point beyond the outline that cutter is positioned at this mo(u)ld bottom half curved surface.By tool motion to the outline top surface edge place of mo(u)ld bottom half curved surface.Open dynamic triaxial Milling Machining center to start to carry out machining along the circumference of blank.After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; The process of step pitch, machining is cut in motion described in repetition, is all removed by the clout on this cutting lay.Described one is cut step pitch is the tool diameter of 35%.

When after the processing completing the first cutting lay, starting point got back to by cutter.Control cutter to move a cutting depth along the negative direction of coordinate system Z axis.Control cutter to move a cutting depth along the negative direction of coordinate system Z axis, repeat the process layered cutting of clout on this cutting lay of described removal, until the height of thin-wall curved-surface shaped piece mo(u)ld bottom half curved surface is cut to C point; By multi-pass machining mo(u)ld bottom half curved surface.

Cutter is positioned at described C point place.Move δ along X-direction, δ=0.3mm, the negative direction along Z axis moves θ, θ=0.3mm.Controlling cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface with straight path along Y-axis positive direction; Cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface along the negative direction of Y-axis with straight path; Complete the machining of the first passage.Cutter is moved one along X-direction and cuts step pitch, control cutter and to move to straight path along Y-axis positive direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Continue just cutter to move one along X-direction and cut step pitch, control cutter and to move to straight path along Y-axis negative direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Complete the machining of the second passage.Repeat the cutting process of described second passage, until machining is to the position of distance D point δ.Complete the processing of the first cutting lay.

Described C point place got back to by cutter.Move 2 δ along X-direction, δ=0.3mm, the negative direction along Z axis moves 2 θ, θ=0.3mm.According to the processing method of described first cutting lay, until machining is to the position of distance D point 2 δ.Complete the processing of the second cutting lay.Repeat the process of the processing of described second cutting lay, until complete the rough cut processing of mo(u)ld bottom half curved surface.

II fine finishining mo(u)ld bottom half curved surface.

The cutter selected in fine finishining is Ф 20 carbide alloy bulb milling cutter.Axial stratification along blank cuts, and makes every layer of cutting depth equal.The cutting depth of every layer is 0.1mm.The parameter of processing is: machine spindle speed is 3000r/min, and the amount of feeding is 2400mm/min, and cutting depth is 0.1mm.

The detailed process of described fine finishining mo(u)ld bottom half curved surface is:

Cutter is positioned at described C point place.Negative direction along Z axis moves θ, θ=0.1mm.Controlling cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface with straight path along Y-axis positive direction; Cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface along the negative direction of Y-axis with straight path; Complete the machining of the first passage in the first cutting lay.Cutter is moved one along X-direction and cuts step pitch, control cutter and to move to straight path along Y-axis positive direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Continue that cutter is moved one along X-direction and cut step pitch, control cutter and to move to straight path along Y-axis negative direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Complete the machining of the second passage.Repeat the cutting process of described second passage, until machining is to distance D point.Complete the processing of the first cutting lay.

Described C point place got back to by cutter.Move δ along X-direction, δ=0.1mm, the negative direction along Z axis moves 2 θ, θ=0.3mm.Controlling cutter according to the cutting process of the first passage in the first cutting lay to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface with straight path along Y-axis negative direction; Complete the machining of the first passage in the second cutting lay.Repeat the cutting process of described first passage, until machining is to the position of distance D point δ.Complete the processing of the second cutting lay.

Repeat described working angles, until complete the smart machining of mo(u)ld bottom half curved surface.In cutting every layer of described mo(u)ld bottom half curved surface, cutter all adds 0.1mm than last layer at the amount of movement δ of X-direction; Amount of movement θ along the negative direction of Z axis all adds 0.3mm than last layer; Every layer of machining all adds 0.1mm than last layer to the distance δ of D point.

Repeat the process of described machining, until complete the smart machining of mo(u)ld bottom half curved surface.

Step 5, processing work hanger.

The first half side of the being body of the outer surface of described workpiece hanger, Lower Half is cone.

Auxiliary clamp is installed.Described auxiliary clamp comprises location core, locating ring, pressing plate and parallels.Location core is as the Set and Positioning face of told thin-wall curved-surface profiled piece, and the lower molding surface size of this profile forms and workpiece is R375 ± 0.3.Locating ring endoporus is of a size of

Locating ring is sleeved on the circumferential surface of described location core; The workpiece completing mo(u)ld bottom half curved surface essence machining is placed in the upper surface of described location core, and the mo(u)ld bottom half curved surface of this workpiece is fitted with the upper surface of location core.By the edge being placed on described workpiece surface of two pressing plate symmetries, two parallels being placed on respectively between the lower surface of each pressing plate and the chassis upper surface of location core, making its uniform force for supporting pressing plate.By screw, two pressing plates are fixed tightly in workpiece surface respectively, thus workpiece and location core are linked together.

When processing hanger, the cutter selected is Ф 60 machine folder slotting cutter, and the axial stratification along workpiece cuts, and makes every layer of cutting depth equal.The cutting depth of every layer is 0.3mm.The parameter of processing is: machine spindle speed is 3000r/min, and the amount of feeding is 2400mm/min, and cutting depth is 0.3mm.

According to the profile of workpiece hanger, adopt the mode of layered cutting, square body and the Lower Half of processing this workpiece hanger first half are respectively cone.

The detailed process of described processing work hanger is:

I machining workpieces hanger first half side body.

Cutter is in beyond the outline edge of described workpiece hanger first half side body blank X-axis negative direction.Cutter moves 0.3mm along Z axis negative direction; Cutter moves to described side's body blank outline edge along X-axis positive direction.Cutter, along four limit moving linearlies of square body blank outline, cuts the party's body blank, returns this cutting lay processing starting point, complete the processing to the party's body first cutting lay after having cut.According to design, cutter is l in the cutting output of X-direction.

Repeat described working angles, until complete the processing of described hanger first half side body.

II machining workpieces hanger Lower Half cone.

Starting point got back to by cutter.Cutter moves 0.3mm along Z axis negative direction, moves to described cone blank outline edge along X-axis positive direction.Cutter, along four limit moving linearlies of square body blank outline, cuts this cone blank, completes the processing of this cone first cutting lay.According to design, cutter in the cutting output of X-direction is

Starting point got back to by cutter.Cutter moves 0.3mm along Z axis negative direction, moves to described cone blank outline edge along X-axis positive direction.Cutter, along four limit moving linearlies of square body blank outline, cuts this cone blank, completes the processing of this cone second cutting lay.According to design, cutter in the cutting output of X-direction is

Starting point got back to by cutter.Cutter moves 0.3mm along Z axis negative direction, moves to described cone blank outline edge along X-axis positive direction.Cutter cuts along square body blank outline this cone blank, completes the processing of this cone the 3rd cutting lay.According to design, cutter in the cutting output of X-direction is

Repeat described working angles, until complete the processing of cone.In cutting every layer of cone, cutter all deducts 0.3mm than last layer in the cutting output of X-direction more.

The cutting way that each cutting lay is fixed a cutting tool is the appearance profile formation cutting tool path along described workpiece hanger 13, cutter returns to start secure position terminate motion on each layer cuts after, then next cutting lay is rapidly moved to, and form cutting tool path according to product design profile, so circulation is until complete the processing of all cutting lays

So far the processing to whole thin-wall curved-surface shaped piece workpiece is completed.

The present invention needs the problem solved to be the process program of thin-wall curved-surface shaped piece in mechanical processing process and clamping method.

At present the processing universal method of this series products be the upper profile of first processing parts to final size, then carry out clamping in hanger part, adopt the method for Linear cut to complete the processing of lower profile.The problem to be solved in the present invention is that the profile up and down of product all realizes machinery

Processing, to replace the linear cutter of lower profile, reduces processing cost, improves working (machining) efficiency.

The present invention is by reasonable arrangement technical process, division cutting zone, upper special-shaped curved region and lower different type curved surface area piecemeal are divided, reserved technique fixture block, the thick finish-milling nc program of Design Orientation frock and each region, the selection of cutter and the determination of cutting parameter, ensure that product quality, significantly improve production efficiency.

Accompanying drawing explanation

Fig. 1 is the structural representation of thin-wall curved-surface shaped piece; Wherein Fig. 1 a is front view, and Fig. 1 b is side view, and Fig. 1 c is top view.

Fig. 2 is step 1 machining sketch chart; Wherein Fig. 2 a is front view, and Fig. 2 b is side view.

Fig. 3 is step 2 machining sketch chart.

Fig. 4 is step 3 machining sketch chart.

Fig. 5 is curved surface positioning tool schematic diagram; Wherein Fig. 5 a is front view, and Fig. 5 b is side view, and Fig. 5 c is top view.

Fig. 6 is flow chart of the present invention.

In figure:

1. profile on first; 2. profile on second; 3. profile on the 3rd; 4. profile on the 4th; 5. symmetrical surface; 6. technique briquetting sidewall; 7. technique briquetting; 8. center line, 9. parallels; 10. technique indent; 11. mo(u)ld bottom half curved surfaces; 12. exterior arc surfaces; 13. workpiece hangers; 14. central axis; 15. location cores; 16. locating rings; 17. pressing plates.

Detailed description of the invention

The present embodiment is the method for the upper and lower profile of employing three axle Milling Machining center Milling Process thin-wall curved-surface shaped piece.

Thin-wall curved-surface shaped piece material is the 30Si2MnCrMoVe of unimach.Blank size is Ф 330 × 138, after Vehicle Processing end face and cylindrical, flaw detection, obtains the thin-wall curved-surface shaped piece blank of circular block shape.To this blank upper profile of this thin-wall curved-surface shaped piece of NC milling, lower profile and workpiece hanger according to the following steps.

Step 1, processing and milling technique indent.The technique indent 10 of level is gone out respectively, for the Set and Positioning of workpiece during following process profile in the both sides circumferential surface Milling Process of blank.The center line of this technique indent 10 width is mutually vertical with the center line space of this blank.Shown in Fig. 2.

Step 2, the upper profile of first piece.The mo(u)ld top half face of described workpiece to comprise on first in profile 1, second in profile 2, the 3rd profile 4, symmetrical surface 5 and technique briquetting sidewall 6 in profile 3, the 4th.The process of described milling mo(u)ld top half curved surface comprises the roughing of profile, accurately machined processing retain the technique fixture block 1 on upper profile top, as shown in Figure 3.

During milling, Machine tool pressure plate is pressed on the technique indent 10 of blank both sides, this blank is fixed on machine tooling platform.

The detailed process of milling is:

I roughing technique briquetting sidewall 6: the cutter selected in roughing is Ф 100 carbide end mill.Axial stratification along blank cuts, and makes every layer of cutting depth equal.The cutting depth of every layer is 1mm.

Process the first cutting lay.In cutting, the datum mark of cutter using the central point of technique briquetting 7 upper surface as processing is also the initial point of coordinate system simultaneously.By tool motion to blank top surface edge place.Open dynamic triaxial Milling Machining center to start to carry out machining along the circumference of blank.The parameter of processing is: machine spindle speed is 600r/min, and the amount of feeding is 1200mm/min, and cutting depth is 1mm.After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; After cutter is gone around again and again got back to starting point, control cutter and again cut step pitch to the central motion one of blank, continue to carry out machining to blank surface.The process of step pitch, machining is cut in motion described in repetition, is machined to the edge of technique briquetting 7.Described one is cut step pitch is the tool diameter of 35%.

When being machined to the edge of technique briquetting 7, the machining path of adjustment cutter, makes cutter cut along the profile of this technique briquetting.Complete the processing of the first cutting lay.

When after the processing completing the first cutting lay, starting point got back to by cutter.Control cutter to move a cutting depth along the negative direction of coordinate system Z axis, namely move 1mm.Repeat the process of described processing first cutting lay, complete the processing of the second cutting lay.

When after the processing completing the second cutting lay, starting point got back to by cutter.Control cutter to move a cutting depth along the negative direction of coordinate system Z axis, namely move 1mm, completes the processing of the second cutting lay.

Repeat the process of described processing first cutting lay, until be machined to the symmetrical surface 5 of thin-wall curved-surface shaped piece.

II roughing symmetrical surface 5:

The roughing of described symmetrical surface 5 is completed by a cutting lay.

Add man-hour, by tool motion to starting point, open dynamic triaxial Milling Machining center and start to carry out machining along the circumference of blank.The parameter of processing is: machine spindle speed is 600r/min, and the amount of feeding is 1200mm/min, and cutting depth is 1mm.After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; After cutter is gone around again and again got back to starting point, control cutter and again cut step pitch to the central motion one of blank, continue to carry out machining to blank surface.Described one is cut step pitch is the tool diameter of 35%.The process of step pitch, machining is cut in motion described in repetition, is machined to the edge of symmetrical surface 5.Complete the roughing of symmetrical surface 5.

Profile in III roughing.

A) profile 4 in profile 3 and the 4th is processed on second in described mo(u)ld top half face in profile 2, the 3rd.Profile 3 and the 4th need leaving profile 2, the 3rd on second the allowance for finish of 0.5mm described in roughing during profile 4.The parameter of processing is: machine spindle speed is 600r/min, and the amount of feeding is 1200mm/min, and cutting depth is 1mm.

Add man-hour, by tool motion to starting point, open dynamic triaxial Milling Machining center and start to carry out machining along the circumference of blank.

After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; After cutter is gone around again and again got back to starting point, control cutter and again cut step pitch to the central motion one of blank, continue to carry out machining to blank surface.Described one is cut step pitch is the tool diameter of 35%.

The process of step pitch, machining is cut in motion described in repetition, until the Z-direction plane being machined to this cutting lay place respectively with second on the profile that forms of in profile 3 and the 4th, profile 4 is formed in profile 2, the 3rd intersecting lens, control cutter along this contour motion, complete the processing of the first cutting lay.

When after the processing completing the first cutting lay, starting point got back to by cutter.Control cutter to move a cutting depth along the negative direction of coordinate system Z axis, namely move 1mm.Repeat the process of the first cutting lay, complete the processing of the second cutting lay.

Repeat the process of described first cutting lay and the second cutting lay, until complete the roughing to profile 4 in profile 3 and the 4th in profile 2, the 3rd on described second by technological requirement.

B) profile 1 on first in described mo(u)ld top half face is processed.

Add man-hour, by tool motion to starting point, open dynamic triaxial Milling Machining center and start to carry out machining along the circumference of blank.The parameter of processing is: machine spindle speed is 600r/min, and the amount of feeding is 1200mm/min, and cutting depth is 1mm.

After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; After cutter is gone around again and again got back to starting point, control cutter and again cut step pitch to the central motion one of blank, continue to carry out machining to blank surface.Described one is cut step pitch is the tool diameter of 35%.The process of step pitch, machining is cut in motion described in repetition, until the outline intersection of profile 4 in profile 3 and the 4th in profile 2, the 3rd in the Z-direction plane and second being machined to this cutting lay place, completes the processing of the first cutting lay.

Repeat the process of described first cutting lay and the second cutting lay, until complete the roughing to profile 1 on described first by technological requirement, obtain the semi-finished product of described thin-wall curved-surface shaped piece.

When carrying out fine finishining to the semi-finished product of this thin-wall curved-surface shaped piece after the roughing completing described thin-wall curved-surface shaped piece.

Step 3, the upper profile of finishing workpiece.

Described fine finishining is the processing to profile 4 in profile 3 and the 4th in profile 2, the 3rd in profile on first in upper profile 1, second.When fine finishining, cutter is from the inside feed of the outer rim of workpiece.If the starting point A of cutter is in 9 directions of workpiece, and is positioned on the edge of profile 1 on first.

Detailed process is:

Add man-hour, by tool motion to starting point A, open dynamic triaxial Milling Machining center and start to carry out machining along half-finished circumference of thin-wall curved-surface shaped piece by the parameter of setting.

After cutter is gone around and got back to starting point A, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to the surface of semi-finished of described thin-wall curved-surface shaped piece; After cutter is gone around again and again got back to starting point, control cutter and again cut step pitch to the central motion one of blank, continue to carry out machining to blank surface.Described one is cut step pitch is the tool diameter of 10%.

The process of step pitch, machining is cut in motion described in repetition, until the Z-direction plane being machined to this cutting lay place respectively with second on the profile that forms of in profile 3 and the 4th, profile 4 is formed in profile 2, the 3rd intersecting lens, control cutter along this contour motion, complete the processing of profile 1 on first.

When after the processing completing profile 1 on first, cutter to move 0.3mm respectively along the positive direction of coordinate system Z axis and the positive direction of X-axis, make cutter be in 9 directions of workpiece the 4th on the edge of profile 4, fine finishining is carried out to profile 4 in profile 3 and the 4th in profile 2, the 3rd on second.Add man-hour, cutter is along the outline clockwise movement of profile 4 in profile 3 and the 4th in profile 2, the 3rd on described second.First cutter moves along profile Y direction on the 4th distance of 1/2 the 4th mo(u)ld top half face width degree, completes the processing of 1/2 of described 4th mo(u)ld top half face width degree.Adjustment cutter movement locus be camber line, to be in fourth quadrant second on profile carry out machining.When tool motion is to this intersection of profile in profile and the 3rd on second, the movement locus of adjustment cutter is straight line, to be in workpiece 12 directions the 3rd on profile carry out machining.When tool motion to the 3rd on profile be in first quartile second on the intersection of profile, the movement locus of adjustment cutter is camber line, to this on second profile carry out machining.When tool motion is to this intersection of profile in profile and the 4th on second, the movement locus of adjustment cutter is straight line, to be in workpiece 3 directions the 4th on profile carry out machining.When tool motion to the 4th on profile be in the second quadrant second on the intersection of profile, the movement locus of adjustment cutter is camber line, to be in the second quadrant second on profile carry out machining.When tool motion is to this profile and the intersection being in profile on workpiece 6 directions the 3rd on second, the movement locus of adjustment cutter is straight line, carries out machining to profile on the described 3rd.When tool motion to the 3rd on profile be in third quadrant second on the intersection of profile, the movement locus of adjustment cutter is camber line, carries out machining to profile on described second.When tool motion to this on second profile be in workpiece 9 directions the 4th on the intersection of profile, the movement locus of adjustment cutter is straight line, carries out machining to remaining 1/2 straightway of profile on the described 4th.Complete the fine finishining to profile 4 first passage in profile 3 and the 4th in profile 2, the 3rd on second.

Cutter to move 0.3mm respectively along the positive direction of coordinate system Z axis and the positive direction of X-axis, make cutter be in 9 directions of workpiece the 4th on the edge of profile 4, continue to carry out the fine finishining of the second passage to profile 4 in profile 3 and the 4th in profile 2, the 3rd on second.The finishing passes of described second passage is identical with the finishing passes of described 4 first passages.

Repeat the described finishing passes to profile 4 in profile 3 and the 4th in profile 2, the 3rd on second, until be machined to the edge of symmetrical surface 5.

So far, the fine finishining to profile 4 in profile 3 and the 4th in profile 2, the 3rd in profile 1, second on first is completed.

Step 4, milling mo(u)ld bottom half curved surface.Described milling mo(u)ld bottom half curved surface comprises thin-wall curved-surface shaped piece mo(u)ld bottom half curved surface 11, adopts the mode of layering processing to carry out roughing and fine finishining; Process is divided into 2 steps.

Before processing, by technique briquetting 7 clamping of thin-wall curved-surface shaped piece in machine tool accessories vice.The cutter selected in roughing is Ф 100 carbide end mill, and leaves the chipping allowance of 0.5mm.

Detailed process is:

I roughing mo(u)ld bottom half curved surface.

The cutter that roughing mo(u)ld bottom half curved surface adopts is identical with the cutter of profile in roughing.

Any point beyond the outline that cutter is positioned at this mo(u)ld bottom half curved surface.Process the first cutting lay.In cutting, by tool motion to the outline top surface edge place of mo(u)ld bottom half curved surface.Open dynamic triaxial Milling Machining center to start to carry out machining along the circumference of blank.The parameter of processing is: machine spindle speed is 600r/min, and the amount of feeding is 1200mm/min, and cutting depth is 1mm.After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; After cutter is gone around again and again got back to starting point, control cutter and again cut step pitch to the central motion one of blank, continue to carry out machining to blank surface.The process of step pitch, machining is cut in motion described in repetition, until complete first cutting lay of machining, is all removed by the material on this cutting lay.Described one is cut step pitch is the tool diameter of 35%.

Repeat the process of described processing first cutting lay, until the height of thin-wall curved-surface shaped piece mo(u)ld bottom half curved surface 11 is cut to C point, by multi-pass machining mo(u)ld bottom half curved surface 11.

Described C point place got back to by cutter.Move 2 δ along X-direction, δ=0.3mm, the negative direction along Z axis moves 2 θ, θ=0.3mm.Controlling cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface with straight path along Y-axis positive direction; Cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface along the negative direction of Y-axis with straight path; Complete the machining of the first passage in the second cutting lay.Cutter is moved one along X-direction and cuts step pitch, control cutter and to move to straight path along Y-axis positive direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Continue just cutter to move one along X-direction and cut step pitch, control cutter and to move to straight path along Y-axis negative direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Complete the machining of the second passage.Repeat the cutting process of described second passage, until machining is to the position of distance D point 2 δ.Complete the processing of the second cutting lay.

Described C point place got back to by cutter.Move 3 δ along X-direction, δ=0.3mm, the negative direction along Z axis moves 3 θ, θ=0.3mm.Repeat the process of the processing of described second cutting lay, until machining is to the position of distance D point 3 δ.Complete the processing of the 3rd cutting lay.

Repeat the process of described machining, until complete the rough cut processing of mo(u)ld bottom half curved surface.

II fine finishining mo(u)ld bottom half curved surface.

Cutter is positioned at described C point place.Negative direction along Z axis moves θ, θ=0.1mm.Controlling cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface with straight path along Y-axis positive direction; Cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface along the negative direction of Y-axis with straight path; Complete the machining of the first passage.Cutter is moved one along X-direction and cuts step pitch, control cutter and to move to straight path along Y-axis positive direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Continue that cutter is moved one along X-direction and cut step pitch, control cutter and to move to straight path along Y-axis negative direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Complete the machining of the second passage.Repeat the cutting process of described second passage, until machining is to distance D point.Complete the processing of the first cutting lay.

Described C point place got back to by cutter.Move δ along X-direction, δ=0.1mmmm, the negative direction along Z axis moves 2 θ, θ=0.3mm.Controlling cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface with straight path along Y-axis positive direction; Cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface along the negative direction of Y-axis with straight path; Complete the machining of the first passage in the second cutting lay.Cutter is moved one along X-direction and cuts step pitch, control cutter and to move to straight path along Y-axis positive direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Continue just cutter to move one along X-direction and cut step pitch, control cutter and to move to straight path along Y-axis negative direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Complete the machining of the second passage.Repeat the cutting process of described second passage, until machining is to the position of distance D point δ.Complete the processing of the second cutting lay.

Described C point place got back to by cutter.Move 2 δ along X-direction, δ=0.1mmm, the negative direction along Z axis moves 3 θ, θ=0.1mm.Repeat the process of described second cutting lay, until machining is to the position of distance D point 2 δ.Complete the processing of the 3rd cutting lay.

Step 5 processing work hanger.

According to auxiliary clamp.As shown in Figure 5, described auxiliary clamp comprises location core 15, locating ring 16, pressing plate 17 and parallels 9.Location core 15 is as the Set and Positioning face of told thin-wall curved-surface profiled piece, and the lower profile of this profile forms and workpiece is measure-alike is R375 ± 0.3.Locating ring 16 endoporus is of a size of

Locating ring 16 is sleeved on the circumferential surface of described location core; The workpiece completing mo(u)ld bottom half curved surface essence machining is placed in the upper surface of described location core 15, and the mo(u)ld bottom half curved surface of this workpiece is fitted with the upper surface of location core.By the edge being placed on described workpiece surface of two pressing plate 17 symmetries, two parallels 9 being placed on respectively between the lower surface of each pressing plate and the chassis upper surface of location core, making its uniform force for supporting pressing plate.By screw, two pressing plates are fixed tightly in workpiece surface respectively, thus workpiece and location core are linked together.

Detailed process is:

I machining workpieces hanger first half side body.

Starting point got back to by cutter.Cutter moves 0.3mm along Z axis negative direction, moves to described side's body blank outline edge along X-axis positive direction; Cutter, along four limit moving linearlies of square body blank outline, cuts the party's body blank, completes the processing of the party's body second cutting lay.Repeat described working angles, until complete the processing of described hanger first half side body.

II machining workpieces hanger Lower Half cone.

The cutting way that each cutting lay is fixed a cutting tool is the appearance profile formation cutting tool path along described workpiece hanger 13, cutter returns to start secure position terminate motion on each layer cuts after, then next cutting lay is rapidly moved to, and form cutting tool path according to product design profile, so circulation is until complete the processing of all cutting lays.

Claims

1. a thin-wall curved-surface profiled piece numerical control milling method, is characterized in that, detailed process is:

Step 1, processing and milling technique indent; The technique indent of level is gone out respectively in the both sides circumferential surface Milling Process of blank; The center line of this technique indent width is mutually vertical with the center line space of this blank;

Step 2, the upper profile of first piece; The mo(u)ld top half face of described workpiece to comprise in profile in profile on first, second, the 3rd profile, symmetrical surface and technique briquetting sidewall in profile, the 4th; The process of described milling mo(u)ld top half curved surface comprises the roughing of profile and fine finishining and retains the technique fixture block on upper profile top;

During milling, Machine tool pressure plate is pressed on the technique indent of blank both sides, this blank is fixed on machine tooling platform; The detailed process of milling is:

I roughing technique briquetting sidewall: the cutter selected in roughing is Ф 100 carbide end mill; The parameter of processing is: machine spindle speed is 600r/min, and the amount of feeding is 1200mm/min, and cutting depth is 1mm; Axial stratification along blank cuts, and makes every layer of cutting depth equal, until be machined to the symmetrical surface of thin-wall curved-surface shaped piece;

II roughing symmetrical surface: the roughing of described symmetrical surface is completed by a cutting lay;

Profile in III roughing; In described roughing, profile adopts the mode of layered cutting, and makes every layer of cutting depth equal;

A) profile in profile and the 4th is processed on second in described mo(u)ld top half face in profile, the 3rd; Profile and the 4th need leaving profile, the 3rd on second the allowance for finish of 0.5mm described in roughing during profile; Until complete the roughing to profile 4 in profile and the 4th in profile, the 3rd on described second by technological requirement;

B) profile on first in described mo(u)ld top half face is processed;

Add man-hour, by tool motion to starting point, open dynamic triaxial Milling Machining center and start to carry out machining along the circumference of blank, until complete the roughing to profile on described first by technological requirement, obtain the semi-finished product of described thin-wall curved-surface shaped piece;

Step 3, the upper profile of finishing workpiece;

The cutter selected in fine finishining is Ф 20 carbide alloy bulb milling cutter; Axial stratification along blank cuts, and makes every layer of cutting depth equal; The cutting depth of every layer is 0.3mm; The parameter of processing is: machine spindle speed is 3000r/min, and the amount of feeding is 2400mm/min, and cutting depth is 0.3mm;

The upper profile of described finishing workpiece is the processing to profile in profile and the 4th in profile, the 3rd in profile, second on first in upper profile; When fine finishining, cutter is from the inside feed of the outer rim of workpiece; If the starting point A of cutter is in 9 directions of workpiece, and is positioned on the edge of profile on first, adopt the mode of layered cutting first to process profile on first, then to process on second in profile, the 3rd profile in profile and the 4th simultaneously;

Step 4, milling mo(u)ld bottom half curved surface; Described milling mo(u)ld bottom half curved surface is by the technique briquetting clamping of thin-wall curved-surface shaped piece in machine tool accessories vice, adopts the mode of layering processing to carry out roughing and fine finishining to described thin-wall curved-surface shaped piece mo(u)ld bottom half curved surface;

I roughing mo(u)ld bottom half curved surface: the cutter selected in roughing is Ф 100 carbide end mill, and leaves the chipping allowance of 0.5mm; The parameter of processing is: machine spindle speed is 600r/min, and the amount of feeding is 1200mm/min, and cutting depth is 1mm;

The movement locus on each cutting lay of cutter is: cutter with C point for starting point, and along the vector motion that E point and B point are formed, until move to beyond parts profile; Then move one to the direction of D and cut step-length, along the vector counter motion that E point and B point are formed, until move to beyond parts profile, so circulation is directly processed to D point; Cutter cutting endless form is on each layer identical therewith, and after the processing finishing a cutting lay, cutter retreats to safety zone, and feed forms new cutting lay again, and so circulation is directly processed to the size of roughing requirement;

II fine finishining mo(u)ld bottom half curved surface;

The cutter selected in fine finishining is Ф 20 carbide alloy bulb milling cutter; Axial stratification along blank cuts, and makes every layer of cutting depth equal; The parameter of processing is: machine spindle speed is 3000r/min, and the amount of feeding is 2400mm/min, and cutting depth is 0.1mm;

The process of Repeated Cutting processing, until complete the smart machining of mo(u)ld bottom half curved surface;

Step 5, processing work hanger;

The first half side of the being body of the outer surface of described workpiece hanger, Lower Half is cone;

Auxiliary clamp is installed; Described auxiliary clamp comprises location core, locating ring, pressing plate and parallels; Location core is as the Set and Positioning face of told thin-wall curved-surface profiled piece, and the lower molding surface size of this profile forms and workpiece is R375 ± 0.3; Locating ring endoporus is of a size of

Locating ring is sleeved on the circumferential surface of described location core; The workpiece completing mo(u)ld bottom half curved surface essence machining is placed in the upper surface of described location core, and the mo(u)ld bottom half curved surface of this workpiece is fitted with the upper surface of location core; By the edge being placed on described workpiece surface of two pressing plate symmetries, two parallels being placed on respectively between the lower surface of each pressing plate and the chassis upper surface of location core, making its uniform force for supporting pressing plate; By screw, two pressing plates are fixed tightly in workpiece surface respectively, thus workpiece and location core are linked together;

When processing hanger, the cutter selected is Ф 60 machine folder slotting cutter, and the axial stratification along workpiece cuts, and makes every layer of cutting depth equal; The cutting depth of every layer is 0.3mm; The parameter of processing is: machine spindle speed is 3000r/min, and the amount of feeding is 2400mm/min, and cutting depth is 0.3mm;

According to the profile of workpiece hanger, adopt the mode of layered cutting, square body and the Lower Half of processing this workpiece hanger first half are respectively cone;

2. thin-wall curved-surface profiled piece numerical control milling method as claimed in claim 1, it is characterized in that, in step 2, the detailed process of roughing roughing technique briquetting sidewall is:

Process the first cutting lay; Cutter is using the central point of technique briquetting upper surface as the initial point of coordinate system; By tool motion to blank top surface edge place; Open dynamic triaxial Milling Machining center to start to carry out machining along the circumference of blank; After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; The process of step pitch, machining is cut in motion described in repetition, is machined to the edge of technique briquetting; Described one is cut step pitch is the tool diameter of 35%;

When being machined to the edge of technique briquetting, the machining path of adjustment cutter, makes cutter cut along the profile of this technique briquetting; Complete the processing of the first cutting lay; Starting point got back to by cutter; Control cutter to move a cutting depth along the negative direction of coordinate system Z axis; Repeat the process of described processing first cutting lay, until be machined to the symmetrical surface of thin-wall curved-surface shaped piece.

3. thin-wall curved-surface profiled piece numerical control milling method as claimed in claim 1, it is characterized in that, in step 2, the detailed process of roughing roughing symmetrical surface is:

By tool motion to starting point, open dynamic triaxial Milling Machining center and start to carry out machining along the circumference of blank; After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; After cutter is gone around again and again got back to starting point, control cutter and again cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; The process of step pitch, machining is cut in motion described in repetition, is machined to the edge of symmetrical surface; Complete the roughing of symmetrical surface; Described one is cut step pitch is the tool diameter of 35%.

4. thin-wall curved-surface profiled piece numerical control milling method as claimed in claim 1, it is characterized in that, in step 2, in roughing, the detailed process of profile is:

Add man-hour, by tool motion to starting point, open dynamic triaxial Milling Machining center and start to carry out machining along the circumference of blank; After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; After cutter is gone around again and again got back to starting point, control cutter and again cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; Described one is cut step pitch is the tool diameter of 35%.

5. thin-wall curved-surface profiled piece numerical control milling method as claimed in claim 1, is characterized in that, adopts the detailed process of profile in the mode fine finishining of layered cutting to be in step 3:

The processing of profile on first: add man-hour, by tool motion to starting point A, opens dynamic triaxial Milling Machining center and starts to carry out machining along half-finished circumference of thin-wall curved-surface shaped piece by the parameter of setting; After cutter is gone around and got back to starting point A, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to the surface of semi-finished of described thin-wall curved-surface shaped piece; Until the Z-direction plane being machined to this cutting lay place respectively with second on the profile that forms of in profile and the 4th, profile is formed in profile, the 3rd intersecting lens, control cutter along this contour motion, complete the processing of profile on first; Described one is cut step pitch is the tool diameter of 10%;

The processing of profile in profile and the 4th in profile, the 3rd on second: cutter to move 0.3mm respectively along the positive direction of coordinate system Z axis and the positive direction of X-axis, make cutter be in 9 directions of workpiece the 4th on the edge of profile, fine finishining is carried out to profile in profile and the 4th in profile, the 3rd on second; Add man-hour, cutter is along the outline clockwise movement of profile in profile and the 4th in profile, the 3rd on described second; First cutter moves along profile Y direction on the 4th distance of 1/2 the 4th mo(u)ld top half face width degree, completes the processing of 1/2 of described 4th mo(u)ld top half face width degree; Adjustment cutter movement locus be camber line, to be in fourth quadrant second on profile carry out machining; When tool motion is to this intersection of profile in profile and the 3rd on second, the movement locus of adjustment cutter is straight line, to be in workpiece 12 directions the 3rd on profile carry out machining; When tool motion to the 3rd on profile be in first quartile second on the intersection of profile, the movement locus of adjustment cutter is camber line, to this on second profile carry out machining; When tool motion is to this intersection of profile in profile and the 4th on second, the movement locus of adjustment cutter is straight line, to be in workpiece 3 directions the 4th on profile carry out machining; When tool motion to the 4th on profile be in the second quadrant second on the intersection of profile, the movement locus of adjustment cutter is camber line, to be in the second quadrant second on profile carry out machining; When tool motion is to this profile and the intersection being in profile on workpiece 6 directions the 3rd on second, the movement locus of adjustment cutter is straight line, carries out machining to profile on the described 3rd; When tool motion to the 3rd on profile be in third quadrant second on the intersection of profile, the movement locus of adjustment cutter is camber line, carries out machining to profile on described second; When tool motion to this on second profile be in workpiece 9 directions the 4th on the intersection of profile, the movement locus of adjustment cutter is straight line, carries out machining to remaining 1/2 straightway of profile on the described 4th; Complete the fine finishining to profile first in profile and the 4th in profile, the 3rd on second time; Cutter to move 0.3mm respectively along the positive direction of coordinate system Z axis and the positive direction of X-axis, make cutter be in 9 directions of workpiece the 4th on the edge of profile 4, continue to carry out fine finishining to profile in profile and the 4th in profile, the 3rd on second according to the accurately machined process of described first passage; Until be machined to the edge of symmetrical surface;

6. thin-wall curved-surface profiled piece numerical control milling method as claimed in claim 1, it is characterized in that, the B point described in step 4 is positioned at the edge in described mo(u)ld bottom half curved surface 6 directions; Described E point is positioned at the edge in described mo(u)ld bottom half curved surface 12 directions; Described C point is positioned at the edge in described mo(u)ld bottom half curved surface 9 directions; Described D point is positioned at the edge in described mo(u)ld bottom half curved surface 3 directions; According to design, the cross section of this mo(u)ld bottom half curved surface is arc; Described C point and D point lay respectively at two tops of arc, and the axial height on thin-wall curved-surface shaped piece is the highest; Described C point and D is point-symmetric is distributed at the bottom of the arc of mo(u)ld bottom half curved surface, the axial height on thin-wall curved-surface shaped piece is minimum.

7. thin-wall curved-surface profiled piece numerical control milling method as claimed in claim 1, it is characterized in that, in step 4, the detailed process of roughing mo(u)ld bottom half curved surface is:

Any point beyond the outline that cutter is positioned at this mo(u)ld bottom half curved surface; By tool motion to the outline top surface edge place of mo(u)ld bottom half curved surface; Open dynamic triaxial Milling Machining center to start to carry out machining along the circumference of blank; After cutter is gone around and got back to starting point, control cutter and cut step pitch to the central motion one of blank, continue to carry out machining to blank surface; The process of step pitch, machining is cut in motion described in repetition, is all removed by the clout on this cutting lay; Described one is cut step pitch is the tool diameter of 35%;

When after the processing completing the first cutting lay, starting point got back to by cutter; Control cutter to move a cutting depth along the negative direction of coordinate system Z axis; Control cutter to move a cutting depth along the negative direction of coordinate system Z axis, repeat the process layered cutting of clout on this cutting lay of described removal, until the height of thin-wall curved-surface shaped piece mo(u)ld bottom half curved surface is cut to C point; By multi-pass machining mo(u)ld bottom half curved surface;

Cutter is positioned at described C point place; Move δ along X-direction, δ=0.3mm, the negative direction along Z axis moves θ, θ=0.3mm; Controlling cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface with straight path along Y-axis positive direction; Cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface along the negative direction of Y-axis with straight path; Complete the machining of the first passage; Cutter is moved one along X-direction and cuts step pitch, control cutter and to move to straight path along Y-axis positive direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Continue just cutter to move one along X-direction and cut step pitch, control cutter and to move to straight path along Y-axis negative direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Complete the machining of the second passage; Repeat the cutting process of described second passage, until machining is to the position of distance D point δ; Complete the processing of the first cutting lay; Described C point place got back to by cutter; Move 2 δ along X-direction, δ=0.3mm, the negative direction along Z axis moves 2 θ, θ=0.3mm; According to the processing method of described first cutting lay, until machining is to the position of distance D point 2 δ; Complete the processing of the second cutting lay; Repeat the process of described second cutting lay, until complete the rough cut processing of mo(u)ld bottom half curved surface.

8. thin-wall curved-surface profiled piece numerical control milling method as claimed in claim 1, it is characterized in that, in step 4, the detailed process of fine finishining mo(u)ld bottom half curved surface is:

Cutter is positioned at described C point place; Negative direction along Z axis moves θ, θ=0.1mm; Controlling cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface with straight path along Y-axis positive direction; Cutter to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface along the negative direction of Y-axis with straight path; Complete the machining of the first passage in the first cutting lay; Cutter is moved one along X-direction and cuts step pitch, control cutter and to move to straight path along Y-axis positive direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Continue that cutter is moved one along X-direction and cut step pitch, control cutter and to move to straight path along Y-axis negative direction beyond the outer margin contour of described mo(u)ld bottom half curved surface; Complete the machining of the second passage; Repeat the cutting process of described second passage, until machining is to distance D point; Complete the processing of the first cutting lay;

Described C point place got back to by cutter; Move δ along X-direction, δ=0.1mm, the negative direction along Z axis moves 2 θ, θ=0.3mm; Controlling cutter according to the cutting process of the first passage in the first cutting lay to move to beyond the outer margin contour of described mo(u)ld bottom half curved surface with straight path along Y-axis negative direction; Complete the machining of the first passage in the second cutting lay; Repeat the cutting process of described first passage, until machining is to the position of distance D point δ; Complete the processing of the second cutting lay;

Repeat described working angles, until complete the smart machining of mo(u)ld bottom half curved surface; In cutting every layer of described mo(u)ld bottom half curved surface, cutter all adds 0.1mm than last layer at the amount of movement δ of X-direction; Amount of movement θ along the negative direction of Z axis all adds 0.3mm than last layer; Every layer of machining all adds 0.1mm than last layer to the distance δ of D point;

9. thin-wall curved-surface profiled piece numerical control milling method as claimed in claim 1, it is characterized in that, in step 5, the detailed process of workpiece hanger is:

I machining workpieces hanger first half side body;

Cutter is made to be in beyond the outline edge of described workpiece hanger first half side body blank X-axis negative direction; Cutter moves 0.3mm along Z axis negative direction; Cutter moves to described side's body blank outline edge along X-axis positive direction; Cutter, along four limit moving linearlies of square body blank outline, cuts the party's body blank, returns this cutting lay processing starting point, complete the processing to the party's body first cutting lay after having cut; According to design, cutter is l in the cutting output of X-direction;

Repeat described working angles, until complete the processing of described hanger first half side body;

II machining workpieces hanger Lower Half cone;

Starting point got back to by cutter; Cutter moves 0.3mm along Z axis negative direction, moves to described cone blank outline edge along X-axis positive direction; Cutter, along four limit moving linearlies of square body blank outline, cuts this cone blank, completes the processing of this cone first cutting lay; According to design, cutter in the cutting output of X-direction is

Starting point got back to by cutter; Cutter moves 0.3mm along Z axis negative direction, moves to described cone blank outline edge along X-axis positive direction; Cutter, along four limit moving linearlies of square body blank outline, cuts this cone blank, completes the processing of this cone second cutting lay; According to design, cutter in the cutting output of X-direction is

Starting point got back to by cutter; Cutter moves 0.3mm along Z axis negative direction, moves to described cone blank outline edge along X-axis positive direction; Cutter cuts along square body blank outline this cone blank, completes the processing of this cone the 3rd cutting lay; According to design, cutter in the cutting output of X-direction is

Repeat described working angles, until complete the processing of cone; In cutting every layer of cone, cutter all deducts 0.3mm than last layer in the cutting output of X-direction more;

The cutting way that each cutting lay is fixed a cutting tool is the appearance profile formation cutting tool path along described workpiece hanger, cutter returns to start secure position terminate motion on each layer cuts after, then next cutting lay is rapidly moved to, and form cutting tool path according to product design profile, so circulation is until complete the processing of all cutting lays.