CN102581620A - Method for turning and milling to realize typical characteristics of aircraft landing gear - Google Patents
Method for turning and milling to realize typical characteristics of aircraft landing gear Download PDFInfo
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- CN102581620A CN102581620A CN2012100668343A CN201210066834A CN102581620A CN 102581620 A CN102581620 A CN 102581620A CN 2012100668343 A CN2012100668343 A CN 2012100668343A CN 201210066834 A CN201210066834 A CN 201210066834A CN 102581620 A CN102581620 A CN 102581620A
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- 238000003801 milling Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007514 turning Methods 0.000 title abstract description 6
- 238000005520 cutting process Methods 0.000 claims description 54
- 210000003454 tympanic membrane Anatomy 0.000 claims description 12
- 241000220317 Rosa Species 0.000 claims description 7
- 238000003672 processing method Methods 0.000 claims description 6
- 210000000883 ear external Anatomy 0.000 claims description 3
- 238000009499 grossing Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 22
- 238000009966 trimming Methods 0.000 abstract 2
- 238000005555 metalworking Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
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Abstract
A method for turning and milling to realize typical characteristics of an aircraft landing gear includes the steps: firstly, orthogonal turn-milling for rough machining; secondly, milling to remove intermediate allowance of a lug; thirdly, fine trimming of the bottom of the lug; fourthly, milling of the periphery of the lug; fifthly, fine trimming of the top of the lug; sixthly, semi-finish machining of the inner wall of the lug; seventhly, semi-finish machining and finish machining of the outer wall of the lug; eighthly, finish machining of the inner wall of the lug; and ninthly, finish machining of an outer cylindrical surface. The method mainly aims to realize the common lug characteristics of parts of the landing gear to solve problems in machining the parts. The technological method has the advantages that machining efficiency and the quality of surfaces of workpieces can be effectively improved, and simultaneously, machining is lowered. In addition, the method has an actual reference value in the field of machining process.
Description
(1) technical field:
The present invention relates to a kind of processing technology, specifically relate to a kind of characteristic feature turnning and milling processing method of undercarriage.Belong to the mechanical processing technique technical field.
(2) background technology:
In recent years; Along with war products such as increasingly sophisticatedization of product and production efficiency increasingly high requirement, especially Aeronautics and Astronautics, its profile becomes increasingly complex; It is also increasingly high that precision, efficient etc. require, typical case and traditional turning processing and Milling Process has been difficult to meet the demands.Therefore, the turnning and milling Compositions of metal-working machines just arises at the historic moment.The turnning and milling Compositions of metal-working machines can be realized clamping of complex parts, accomplishes whole manufacturing procedures, can increase substantially production efficiency and machining accuracy.At present, for the application of turnning and milling Compositions of metal-working machines and technics institution then relatively a little less than, the overwhelming majority just rest on car with mill two kinds of processing modes and be compound on a machine tool, and underuse the advantage of turnning and milling Compositions of metal-working machines.
Undercarriage class part is because the particularity of its profile uses lathe or milling machine all can't accomplish the machining to it separately.Now, undercarriage class parts machining process scheme roughly has two kinds: a kind of is the turning of on lathe, accomplishing all continuous surfaces of revolution earlier, on multiple-spindle milling machine, carries out milling then; Another kind is accomplished turning and three millings on the turnning and milling Compositions of metal-working machines, to carry out clamping No. one time, and the C axle only turns round as station and uses.
Process of the present invention is to work out to the typical structure characteristic of undercarriage class part specially; Realizing on the basis that operation is concentrated; Distinctive turnning and milling processing mode on turning, milling and the turnning and milling Compositions of metal-working machines is carried out reasonable layout; To the typical discontinuous rotary surface characteristic of undercarriage, use the orthogonal turn-milling processing mode in a large number, and use more suitable cutter; Can realize significantly improving of working (machining) efficiency, workpiece surface quality, also effectively reduce processing cost simultaneously.
(3) summary of the invention
1, purpose: the object of the present invention is to provide a kind of characteristic feature turnning and milling processing method of undercarriage, this process is primarily aimed at the total ear's position characteristic of undercarriage class part, to solve the problem in existing such part processing.This process can effectively improve working (machining) efficiency and workpiece surface quality, cuts down finished cost simultaneously.
2, technical scheme: the present invention realizes through following technical scheme:
The characteristic feature of a kind of undercarriage of the present invention (ear) turnning and milling processing method, this characteristic inner and outer wall is a key position, and higher required precision is arranged, and therefore divides roughing, radius processing, three steps of fine finishining to accomplish; Profile does not then have required precision, once opens the thick profile that directly is trimmed to later.Concrete steps are following:
Step 1: orthogonal turn-milling is opened slightly;
Prepare blank, put lathe and clamping location.Most of surplus is removed in orthogonal turn-milling undercarriage ear position, like Fig. 1 a, Fig. 1 b.Selecting cutter for use is flat corner rounding(milling) cutter, and the 20%-40% of diameter of work is selected in the tool diameter suggestion, and Y eccentric shaft amount is set to the 50%-70% milling cutter diameter, and processing mode is along upmilling, X, Y, Z, the four-axle linked processing of C, and allowance for finish is about 0.2mm.
Step 2: surplus in the middle of the ear is removed in milling
Surplus in the middle of the ear is removed in milling, like Fig. 2 a, Fig. 2 b.Selecting cutter for use is flat slotting cutter, and the tool diameter suggestion is chosen as the 60%-70% of ear space, and processing mode is along upmilling, X, Y, the processing of Z three-shaft linkage.Cutting parameter selects for use cutter to recommend the 40%-60% of cutting parameter, and suitably improves feed speed, and the semifinishing surplus is about 0.5mm.
Step 3: refine eardrum portion;
Residual surplus in the step 2 is removed by milling eardrum portion, and fine finishining eardrum portion's fillet and bottom surface are like Fig. 3 a, Fig. 3 b.Selecting cutter for use is rose cutter, and tool radius is with eardrum portion radius of corner, and processing mode is climb cutting, and X, Y, Z three-shaft linkage, cutting parameter select for use cutter to recommend the 40%-60% of cutting parameter, and suitably improve feed speed, and surplus is 0.
Step 4: around the milling ear;
Fillet surplus around the ear is removed in milling, like Fig. 4 a, Fig. 4 b.Selecting cutter for use is rose cutter, and tool radius is ear's radius of corner, and processing mode is climb cutting, X, Y, Z, B, C five-axle linkage processing, and cutting parameter selects for use cutter to recommend the 40%-60% of cutting parameter, and suitably improves feed speed, and surplus is 0.
Step 5: refine ear top
Ear top surplus is removed in milling, like Fig. 5 a, Fig. 5 b.Selecting cutter for use is flat slotting cutter, and processing mode is climb cutting, and X, Y, Z three-shaft linkage, cutting parameter select for use cutter to recommend the 40%-60% of cutting parameter, and suitably improve feed speed, and surplus is 0.
Step 6: semifinishing ear inwall
Milling ear inwall is like Fig. 6 a, Fig. 6 b.Selecting cutter for use is the multiple-cutting-edge slotting cutter, and tool diameter is with 2, and processing mode is climb cutting, and three-shaft linkage, cutting parameter select for use cutter to recommend the 40%-60% of cutting parameter, and suitably improve feed speed, and surplus is about 0.2mm.
Step 7: half smart, fine finishining ear outer wall
Half smart, fine finishining ear outer wall is like Fig. 7 a, Fig. 7 b.Selecting cutter for use is the square shoulder milling cutter.Processing mode is climb cutting, three-shaft linkage, and feed in a zigzag, step pitch is selected unsuitable excessive, and the fine finishining step pitch is less than the semifinishing step pitch, and the semifinishing surplus is about 0.2mm, and allowance for finish is 0.
Step 8: fine finishining ear inwall
Milling ear inwall is like Fig. 8 a, Fig. 8 b.To select cutter for use be solid carbide end mill or can not produce the long sword multiple-cutting-edge slotting cutter that connects tool marks, and tool diameter is with 6.Processing mode is climb cutting, three-shaft linkage, and one-pass smoothing inwall, surplus is 0.
Step 9: external cylindrical surface fine finishining
Orthogonal turn-milling fine finishining undercarriage ear external cylindrical surface is like Fig. 9 a, Fig. 9 b.Selecting cutter for use is the flat milling cutter of band wiper edges, and tool diameter is with 1, and Y eccentric shaft amount is provided with to be needed to confirm according to the wiper edges geometry of cutter, concrete numeric reference cutter manufacturer recommendation.Processing mode is climb cutting, and X, Y, Z, C are four-axle linked.After workpiece is finally accomplished like Figure 10.
3, advantage and effect:
(1) realizes " clamping, all completion ", save the clamping positioning time on milling machine in a large number, also improve clamping precision simultaneously because reduce the location.
(2) use orthogonal turn-milling to process the discontinuous surface of revolution, replace 3 traditional millings.Can effectively reduce station, improve working (machining) efficiency, avoid the tool marks that connect between different station simultaneously.
(3) on the turnning and milling Compositions of metal-working machines, use fillet around 5 interlock cutting ears, but the processing of all fillets around the cutting at one time completion significantly promotes working (machining) efficiency.
(4) cutter selects for use.In orthogonal turn-milling processing, select for use flat corner rounding(milling) cutter to carry out roughing, select for use the flat milling cutter of band wiper edges to carry out fine finishining, when guaranteeing working (machining) efficiency, also can guarantee workpiece surface quality.
(5) a whole set of process program can effectively promote working (machining) efficiency more than 30%, cuts down finished cost more than 20%.
(4) description of drawings
Fig. 1 (a) is the right view of to be processed operation 1;
Fig. 1 (b) is the front view of to be processed operation 1;
Fig. 2 (a) is the front view of to be processed operation 2;
Fig. 2 (b) is the vertical view of to be processed operation 2;
Fig. 3 (a) is the front view of to be processed operation 3;
Fig. 3 (b) is the vertical view of to be processed operation 3;
Fig. 4 (a) is the front view of to be processed operation 4;
Fig. 4 (b) is the vertical view of to be processed operation 4;
Fig. 5 (a) is the front view of to be processed operation 5;
Fig. 5 (b) is the vertical view of to be processed operation 5;
Fig. 6 (a) is the front view of to be processed operation 6;
Fig. 6 (b) is the vertical view of to be processed operation 6;
Fig. 7 (a) is the front view of to be processed operation 7;
Fig. 7 (b) is the vertical view of to be processed operation 7;
Fig. 8 (a) is the front view of to be processed operation 8;
Fig. 8 (b) is the vertical view of to be processed operation 8;
Fig. 9 (a) is the right view of to be processed operation 9;
Fig. 9 (b) is the front view of to be processed operation 9;
Figure 10 is the final manuscript of undercarriage spare;
Figure 11 is a FB(flow block) of the present invention.
Symbol description is following among the figure:
Intermittent line representes to add the cutter path in man-hour among the figure
(5) specific embodiment
See Figure 11, the characteristic feature turnning and milling processing method of a kind of undercarriage of the present invention, these method concrete steps are following:
1. orthogonal turn-milling is opened slightly.
Prepare blank, bring up to lathe and clamping location.Most of surplus is removed in orthogonal turn-milling undercarriage ear position, like Fig. 1 a, Fig. 1 b.Selecting cutter for use is flat corner rounding(milling) cutter, and the 20%-40% of diameter of work is selected in the tool diameter suggestion, and Y eccentric shaft amount is set to the 50%-70% milling cutter diameter, and processing mode is along upmilling, X, Y, Z, the four-axle linked processing of C, and allowance for finish is about 0.2mm.
Because the particularity of complex milling machine tool clamping causes the general rigidity of frock relatively poor, therefore adding the man-hour cutting-in should not be too big, selects for use cutter to recommend the 40%-60% of cutting parameter, and suitably improves feed speed.Open when thick in order to promote efficient, adopt processing mode, reduce idle stroke, can effectively promote out thick efficient along upmilling.
2. surplus between the milling ear
Surplus in the middle of the ear is removed in milling, like Fig. 2 a, Fig. 2 b.Selecting cutter for use is flat slotting cutter, and the tool diameter suggestion is chosen as the 60%-70% of ear space, and processing mode is along upmilling, X, Y, the processing of Z three-shaft linkage.Cutting parameter selects for use cutter to recommend the 40%-60% of cutting parameter, and suitably improves feed speed, and the semifinishing surplus is about 0.5mm.
3. refine eardrum portion
Residual surplus in the step 2 is removed by milling eardrum portion, and fine finishining eardrum portion's fillet and bottom surface are like Fig. 3 a, Fig. 3 b.Selecting cutter for use is rose cutter, and tool radius is with eardrum portion radius of corner, and processing mode is climb cutting, and X, Y, Z three-shaft linkage, cutting parameter select for use cutter to recommend the 40%-60% of cutting parameter, and suitably improve feed speed, and surplus is 0.
It is less that this goes on foot used ball head knife diameter, because ear's interference needs long overhanging, the preferential handle of a knife that prolongs of suggestion reduces the knife bar extension elongation as far as possible.As the long serious vibration that causes that overhangs, can adopt vibration resistant cutter bar.For making last surface quality better, reduce the artificial polishing time, adding the man-hour step pitch should not be too big.
4. fillet around the milling ear
Fillet surplus around the ear is removed in milling, like Fig. 4 a, Fig. 4 b.Selecting cutter for use is rose cutter, and tool radius is ear's radius of corner, and processing mode is climb cutting, X, Y, Z, B, C five-axle linkage processing, and cutting parameter selects for use cutter to recommend the 40%-60% of cutting parameter, and suitably improves feed speed, and surplus is 0.
Because fillet is close to the ear sidewall around the ear, it is serious to add the man-hour interference problem, adopts traditional " 3+2 " processing mode need repeatedly rotate the C axle and changes the B shaft position, comparatively loaded down with trivial details, and it is lower to cut efficient, and it is obvious to connect tool marks, and surface quality is relatively poor.Adopt the processing mode of five-axle linkage, can effectively solve interference problem, and one-pass process around whole fillets, working (machining) efficiency is high, and does not connect tool marks, surface quality is good.
5. refine ear top
Ear top surplus is removed in milling, like Fig. 5 a, Fig. 5 b.Selecting cutter for use is flat slotting cutter, and processing mode is climb cutting, and X, Y, Z three-shaft linkage, cutting parameter select for use cutter to recommend the 40%-60% of cutting parameter, and suitably improve feed speed, and surplus is 0.
Adopt flat slotting cutter, ear top refine is accomplished in a milling, substitutes traditional processing with ball head knife, and working (machining) efficiency is high, and does not connect tool marks, and surface quality is good, but will note lathe Y axle stroke, avoids the excess of stroke.
6. semifinishing ear inwall
Milling ear inwall is like Fig. 6 a, Fig. 6 b.Selecting cutter for use is the multiple-cutting-edge slotting cutter, and tool diameter is with 2, and processing mode is climb cutting, and three-shaft linkage, cutting parameter select for use cutter to recommend the 40%-60% of cutting parameter, and suitably improve feed speed, and surplus is about 0.2mm.
Use the multiple-cutting-edge slotting cutter to carry out semifinishing, can adopt big cutting-in to process the ear inwall, the surface can produce and connect tool marks, therefore stays the surplus about 0.2mm to be used for fine finishining.
7. half smart, fine finishining ear outer wall
Half smart, fine finishining ear outer wall is like Fig. 7 a, Fig. 7 b.Selecting cutter for use is the square shoulder milling cutter.Processing mode is climb cutting, three-shaft linkage, and feed in a zigzag, step pitch is selected unsuitable excessive, and the fine finishining step pitch is less than the semifinishing step pitch, and the semifinishing surplus is about 0.2mm, and allowance for finish is 0.
8. fine finishining ear inwall
Milling ear inwall is like Fig. 8 a, Fig. 8 b.To select cutter for use be solid carbide end mill or can not produce the long sword multiple-cutting-edge slotting cutter that connects tool marks, and tool diameter is with 6.Processing mode is climb cutting, three-shaft linkage, and one-pass smoothing inwall, surplus is 0.
9. external cylindrical surface fine finishining
Orthogonal turn-milling fine finishining undercarriage ear external cylindrical surface is like Fig. 9 a, Fig. 9 b.Selecting cutter for use is the flat milling cutter of band wiper edges, and tool diameter is with 1, and Y eccentric shaft amount is provided with to be needed to confirm according to the wiper edges geometry of cutter, concrete numeric reference cutter manufacturer recommendation.Processing mode is climb cutting, and X, Y, Z, C are four-axle linked.Accomplish processing, final completion figure is Figure 10.
Use orthogonal turn-milling to carry out fine finishining, replace traditional elder generation to carry out parallel fine finishining with rose cutter, with the mode of artificial polishing, can effectively improve working (machining) efficiency more than 200% subsequently, processing back surface quality can reach mirror effect, roughness Ra＜1 simultaneously.
Claims (1)
1. the characteristic feature turnning and milling processing method of a undercarriage, it is characterized in that: these method concrete steps are following:
Step 1: orthogonal turn-milling is opened slightly
Prepare blank, put lathe and clamping location, most of surplus is removed in orthogonal turn-milling undercarriage ear position; Selecting cutter for use is flat corner rounding(milling) cutter, and the 20%-40% of diameter of work is selected in the tool diameter suggestion, and Y eccentric shaft amount is set to the 50%-70% milling cutter diameter, and processing mode is along upmilling, X, Y, Z, the four-axle linked processing of C, and allowance for finish is 0.2mm;
Step 2: surplus in the middle of the ear is removed in milling
Surplus in the middle of the ear is removed in milling, and selecting cutter for use is flat slotting cutter, and the tool diameter suggestion is chosen as the 60%-70% of ear space, and processing mode is along upmilling, X, Y, the processing of Z three-shaft linkage; Cutting parameter selects for use cutter to recommend the 40%-60% of cutting parameter, and suitably improves feed speed, and the semifinishing surplus is 0.5mm;
Step 3: refine eardrum portion
Residual surplus in the step 2 is removed, fine finishining eardrum portion's fillet and bottom surface by milling eardrum portion; Selecting cutter for use is rose cutter, and tool radius is with eardrum portion radius of corner, and processing mode is climb cutting; X, Y, Z three-shaft linkage; Cutting parameter selects for use cutter to recommend the 40%-60% of cutting parameter, and suitably improves feed speed, and surplus is 0;
Step 4: around the milling ear
Fillet surplus around the ear is removed in milling, and selecting cutter for use is rose cutter, and tool radius is ear's radius of corner; Processing mode is climb cutting, X, Y, Z, B, C five-axle linkage processing, and cutting parameter selects for use cutter to recommend the 40%-60% of cutting parameter; And suitably improving feed speed, surplus is 0;
Step 5: refine ear top
Ear top surplus is removed in milling, and selecting cutter for use is flat slotting cutter, and processing mode is climb cutting, and X, Y, Z three-shaft linkage, cutting parameter select for use cutter to recommend the 40%-60% of cutting parameter, and suitably improve feed speed, and surplus is 0;
Step 6: semifinishing ear inwall
Milling ear inwall, selecting cutter for use is the multiple-cutting-edge slotting cutter, the same step 2 of tool diameter, processing mode is climb cutting, and three-shaft linkage, cutting parameter select for use cutter to recommend the 40%-60% of cutting parameter, and suitably improve feed speed, and surplus is 0.2mm;
Step 7: half smart, fine finishining ear outer wall
Half smart, fine finishining ear outer wall, selecting cutter for use is the square shoulder milling cutter, processing mode is climb cutting, three-shaft linkage, feed in a zigzag, step pitch is selected unsuitable excessive, and the fine finishining step pitch is less than the semifinishing step pitch, and the semifinishing surplus is 0.2mm, and allowance for finish is 0;
Step 8: fine finishining ear inwall
Milling ear inwall, to select cutter for use be solid carbide end mill or can not produce the long sword multiple-cutting-edge slotting cutter that connects tool marks, the same step 6 of tool diameter, processing mode is climb cutting, three-shaft linkage, one-pass smoothing inwall, surplus is 0;
Step 9: external cylindrical surface fine finishining
Orthogonal turn-milling fine finishining undercarriage ear external cylindrical surface; Selecting cutter for use is the flat milling cutter of band wiper edges, and the same step 1 of tool diameter, Y eccentric shaft amount are provided with to be needed to confirm according to the wiper edges geometry of cutter; Concrete numeric reference cutter manufacturer recommendation; Processing mode is climb cutting, and X, Y, Z, C are four-axle linked, and workpiece is final accomplishes all processing.
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| CN 201210066834 CN102581620B (en) | 2012-03-14 | 2012-03-14 | Method for turning and milling to realize typical characteristics of aircraft landing gear |
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| CN103273124A (en) * | 2013-05-29 | 2013-09-04 | 广东鸿图南通压铸有限公司 | Manufacturing method for rapidly forming camshaft bracket |
| CN104015015A (en) * | 2014-06-23 | 2014-09-03 | 什邡市明日宇航工业股份有限公司 | Numerical control integrated manufacturing technology for parts of outer barrel of main landing gear of airplane |
| CN104526030A (en) * | 2014-12-08 | 2015-04-22 | 湖南南方宇航工业有限公司 | Processing method for T-shaped thin-walled parts |
| CN105499909A (en) * | 2016-01-20 | 2016-04-20 | 哈尔滨飞机工业集团有限责任公司 | Helicopter undercarriage inner barrel short support arm machining method |
| CN106077775A (en) * | 2016-08-04 | 2016-11-09 | 成都航飞航空机械设备制造有限公司 | A kind of processing method of three axle machine tooling back-off class workpiece |
| CN106825702A (en) * | 2016-12-15 | 2017-06-13 | 湖北三江航天红阳机电有限公司 | A kind of nose cone hat whole glass steel bay section machining process of end face with angle |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103273124A (en) * | 2013-05-29 | 2013-09-04 | 广东鸿图南通压铸有限公司 | Manufacturing method for rapidly forming camshaft bracket |
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| CN104526030B (en) * | 2014-12-08 | 2016-08-24 | 湖南南方宇航工业有限公司 | A kind of processing method of T-shaped thin-walled parts |
| CN105499909A (en) * | 2016-01-20 | 2016-04-20 | 哈尔滨飞机工业集团有限责任公司 | Helicopter undercarriage inner barrel short support arm machining method |
| CN106077775A (en) * | 2016-08-04 | 2016-11-09 | 成都航飞航空机械设备制造有限公司 | A kind of processing method of three axle machine tooling back-off class workpiece |
| CN106077775B (en) * | 2016-08-04 | 2018-05-08 | 成都航飞航空机械设备制造有限公司 | A kind of processing method of three axis machine tooling back-off class workpiece |
| CN106825702A (en) * | 2016-12-15 | 2017-06-13 | 湖北三江航天红阳机电有限公司 | A kind of nose cone hat whole glass steel bay section machining process of end face with angle |
| CN106825702B (en) * | 2016-12-15 | 2018-10-19 | 湖北三江航天红阳机电有限公司 | A kind of nose cone hat shape whole glass steel bay section machining process of the end face with angle |
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| Publication number | Publication date |
|---|---|
| CN102581620B (en) | 2013-11-06 |
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