CN102581620B - 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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- 238000003801 milling Methods 0.000 title claims abstract description 80
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- 210000003454 tympanic membrane Anatomy 0.000 claims description 12
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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 product increasingly complex and production efficiency more and more higher requirement, especially Aeronautics and Astronautics, its profile becomes increasingly complex, it is also more and more higher that precision, efficient etc. require, typical case and traditional turning processing and Milling Process has been difficult to meet the demands.Therefore, turn-milling complex machining center just arises at the historic moment.Turn-milling complex machining center can be realized the complex parts clamped one time, completes whole manufacturing procedures, can increase substantially production efficiency and machining accuracy.At present, for the application of turn-milling complex machining center and technics institution relatively a little less than, the overwhelming majority just rests on car and mills two kinds of processing modes and is compound on a machine tool, and underuses the advantage of turn-milling complex machining center.
Undercarriage class part is due to the particularity of its profile, uses separately lathe or milling machine all can't complete machining to it.Now, undercarriage class parts machining process scheme roughly has two kinds: a kind of is the turning of first completing all continuous rotary faces on lathe, then carries out milling on multiple-spindle milling machine; Another kind is completed turning and three axle millings for to carry out clamped one time on turn-milling complex machining center, and the C axle only turns round to use as station.
Process of the present invention is to work out for the typical structure feature of undercarriage class part specially, realizing on the basis that operation is concentrated, distinctive turnning and milling processing mode on turning, milling and turn-milling complex machining center is carried out reasonable layout, for the typical discontinuous rotary surface feature of undercarriage, a large amount of orthogonal turn-milling processing modes that use, and the more suitable cutter of use, can realize significantly improving of working (machining) efficiency, workpiece surface quality, also effectively reduce simultaneously processing cost.
(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 mainly for the total ear's position feature 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 is achieved through the following technical solutions:
The characteristic feature of a kind of undercarriage of the present invention (ear) turnning and milling processing method, this feature inner and outer wall is key position, and higher required precision is arranged, therefore minute roughing, radius processing, three steps of fine finishining complete; Profile is once opened the thick profile that directly is trimmed to later without required precision.Concrete steps are as follows:
Step 1: orthogonal turn-milling is opened slightly;
Prepare blank, put lathe and clamping and locate.Most of surplus is removed in orthogonal turn-milling undercarriage ear position, as Fig. 1 a, Fig. 1 b.Selecting cutter is flat corner rounding(milling) cutter, tool diameter suggestion select diameter of work 20% ?40%, the Y-axis offset be set to 50% ?70% milling cutter diameter, processing mode be along upmilling, X, Y, Z, C four axis processing, allowance for finish are about 0.2mm.
Step 2: surplus in the middle of ear is removed in milling
Surplus in the middle of ear is removed in milling, as Fig. 2 a, Fig. 2 b.Selecting cutter is flat slotting cutter, tool diameter suggestion be chosen as ear space 60% ?70%, processing mode be along upmilling, X, Y, Z three-shaft linkage are processed.Cutting parameter select cutter recommend cutting parameter 40% ?60%, and suitably improve feed speed, the semifinishing surplus is the 0.5mm left and right.
Step 3: refine eardrum section;
Residual surplus in step 2 is removed by milling eardrum section, and fine finishining eardrum section's fillet and bottom surface are as Fig. 3 a, Fig. 3 b.Selecting cutter is rose cutter, and tool radius is with eardrum section radius of corner, and processing mode is climb cutting, X, Y, Z three-shaft linkage, cutting parameter select cutter recommend cutting parameter 40% ?60%, and suitably improve feed speed, surplus is 0.
Step 4: milling ear surrounding;
Ear's surrounding fillet surplus is removed in milling, as Fig. 4 a, Fig. 4 b.Selecting cutter 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, cutting parameter select cutter recommend cutting parameter 40% ?60%, and suitably improve feed speed, surplus is 0.
Step 5: refine ear top
Milling removal ear top surplus is as Fig. 5 a, Fig. 5 b.Selecting cutter is flat slotting cutter, and processing mode is climb cutting, X, Y, Z three-shaft linkage, cutting parameter select cutter recommend cutting parameter 40% ?60%, and suitably improve feed speed, surplus is 0.
Step 6: semifinishing ear inwall
Milling ear inwall is as Fig. 6 a, Fig. 6 b.Selecting cutter is the multiple-cutting-edge slotting cutter, the same step 2 of tool diameter, and processing mode is climb cutting, and three-shaft linkage, cutting parameter select cutter to recommend 40% ?60% of cutting parameter, and suitably improve feed speed, and surplus is the 0.2mm left and right.
Step 7: half essence, fine finishining ear outer wall
Half essence, fine finishining ear outer wall are as Fig. 7 a, Fig. 7 b.Selecting cutter 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 the 0.2mm left and right, and allowance for finish is 0.
Step 8: fine finishining ear inwall
Milling ear inwall is as Fig. 8 a, Fig. 8 b.To select cutter 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, 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 as Fig. 9 a, Fig. 9 b.Selecting cutter is flat milling cutter with wiper edges, and tool diameter is with 1, and the Y-axis offset arranges to be needed determine 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 completed as Figure 10.
3, advantage and effect:
(1) realize " clamped one time, all completion ", save in a large number the clamping positioning time on milling machine, also improve clamping precision owing to locating to reduce simultaneously.
(2) use the discontinuous surface of revolution of orthogonal turn-milling processing, replace 3 traditional axle millings.Can effectively reduce station, improve working (machining) efficiency, avoid simultaneously the tool marks that connect between different station.
(3) use 5 axle interlocks to cut ear's surrounding fillet on turn-milling complex machining center, but cutting at one time is completed the processing of all fillets of surrounding, significantly promotes working (machining) efficiency.
(4) cutter selects.In orthogonal turn-milling processing, select flat corner rounding(milling) cutter to carry out roughing, select the flat milling cutter with 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 top 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 top 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 top 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 top 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 top 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 top 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 top 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 FB(flow block) of the present invention.
In figure, symbol description is as follows:
In figure, intermittent line represents to add the cutter path in man-hour
(5) specific embodiment
See Figure 11, the characteristic feature turnning and milling processing method of a kind of undercarriage of the present invention, the method concrete steps are as follows:
1. orthogonal turn-milling is opened slightly.
Prepare blank, bring up to lathe and clamping and locate.Most of surplus is removed in orthogonal turn-milling undercarriage ear position, as Fig. 1 a, Fig. 1 b.Selecting cutter is flat corner rounding(milling) cutter, tool diameter suggestion select diameter of work 20% ?40%, the Y-axis offset be set to 50% ?70% milling cutter diameter, processing mode be along upmilling, X, Y, Z, C four axis processing, allowance for finish are about 0.2mm.
Due to the particularity of complex milling machine tool clamping, cause the general rigidity of frock relatively poor, therefore adding the man-hour cutting-in should not be too large, selects cutter to recommend 40% ?60% of cutting parameter, and suitably improves feed speed.Open when thick for raising efficiency, adopt the processing mode along upmilling, reduce idle stroke, can effectively promote out thick efficient.
2. surplus between the milling ear
Surplus in the middle of ear is removed in milling, as Fig. 2 a, Fig. 2 b.Selecting cutter is flat slotting cutter, tool diameter suggestion be chosen as ear space 60% ?70%, processing mode be along upmilling, X, Y, Z three-shaft linkage are processed.Cutting parameter select cutter recommend cutting parameter 40% ?60%, and suitably improve feed speed, the semifinishing surplus is the 0.5mm left and right.
3. refine eardrum section
Residual surplus in step 2 is removed by milling eardrum section, and fine finishining eardrum section's fillet and bottom surface are as Fig. 3 a, Fig. 3 b.Selecting cutter is rose cutter, and tool radius is with eardrum section radius of corner, and processing mode is climb cutting, X, Y, Z three-shaft linkage, cutting parameter select cutter recommend cutting parameter 40% ?60%, and suitably improve feed speed, surplus is 0.
This step ball head knife diameter used is less, needs long overhanging because ear interferes, and the preferential handle of a knife that extends 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 manual polishing time, adding the man-hour step pitch should not be too large.
4. milling ear surrounding fillet
Ear's surrounding fillet surplus is removed in milling, as Fig. 4 a, Fig. 4 b.Selecting cutter 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, cutting parameter select cutter recommend cutting parameter 40% ?60%, and suitably improve feed speed, surplus is 0.
Because ear's surrounding fillet is close to the ear sidewall, add the man-hour interference problem serious, adopt traditional " 3+2 " processing mode to need multiple rotary C axle and change the B shaft position, comparatively loaded down with trivial details, cut efficient lower, connect tool marks obvious, surface quality is relatively poor.Adopt the processing mode of five-axle linkage, can effectively solve interference problem, and one-pass processes the whole fillets of surrounding, working (machining) efficiency is high, and does not connect tool marks, and surface quality is good.
5. refine ear top
Milling removal ear top surplus is as Fig. 5 a, Fig. 5 b.Selecting cutter is flat slotting cutter, and processing mode is climb cutting, X, Y, Z three-shaft linkage, cutting parameter select cutter recommend cutting parameter 40% ?60%, and suitably improve feed speed, surplus is 0.
Adopt flat slotting cutter, ear top refine is completed 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-axis stroke, avoids the excess of stroke.
6. semifinishing ear inwall
Milling ear inwall is as Fig. 6 a, Fig. 6 b.Selecting cutter is the multiple-cutting-edge slotting cutter, the same step 2 of tool diameter, and processing mode is climb cutting, and three-shaft linkage, cutting parameter select cutter to recommend 40% ?60% of cutting parameter, and suitably improve feed speed, and surplus is the 0.2mm left and right.
Use multiple-cutting-edge slotting cutter carries out semifinishing, can adopt large cutting-in to process the ear inwall, and the surface can produce connect tool marks, therefore stays the surplus about 0.2mm to be used for fine finishining.
7. half essence, fine finishining ear outer wall
Half essence, fine finishining ear outer wall are as Fig. 7 a, Fig. 7 b.Selecting cutter 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 the 0.2mm left and right, and allowance for finish is 0.
8. fine finishining ear inwall
Milling ear inwall is as Fig. 8 a, Fig. 8 b.To select cutter 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, 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 as Fig. 9 a, Fig. 9 b.Selecting cutter is flat milling cutter with wiper edges, and tool diameter is with 1, and the Y-axis offset arranges to be needed determine 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.Complete processing, finally completing figure is Figure 10.
Use orthogonal turn-milling to carry out fine finishining, replace traditional first carrying out parallel fine finishining with rose cutter, use subsequently the mode of manual polishing, can effectively improve working (machining) efficiency more than 200%, process simultaneously the rear surface quality and can reach mirror effect, roughness Ra＜1.
Claims (1)
1. the characteristic feature turnning and milling processing method of a undercarriage, it is characterized in that: the method concrete steps are as follows:
Step 1: orthogonal turn-milling is opened slightly
Prepare blank, put lathe and clamping and locate, most of surplus is removed in orthogonal turn-milling undercarriage ear position; Selecting cutter is flat corner rounding(milling) cutter, and the 20%-40% of diameter of work is selected in the tool diameter suggestion, and the Y-axis offset is set to the 50%-70% milling cutter diameter, and processing mode is that X, Y, Z, C four axis processing, allowance for finish are 0.2mm along upmilling;
Step 2: surplus in the middle of ear is removed in milling
Surplus in the middle of ear is removed in milling, and selecting cutter 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 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 section
Milling eardrum section, remove residual surplus in step 2, fine finishining eardrum section's fillet and bottom surface, selecting cutter is rose cutter, and tool radius is with eardrum section radius of corner, and processing mode is climb cutting, X, Y, Z three-shaft linkage, cutting parameter selects cutter to recommend the 40%-60% of cutting parameter, and suitably improves feed speed, and surplus is 0;
Step 4: milling ear surrounding
Ear's surrounding fillet surplus is removed in milling, and selecting cutter 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 cutter to recommend the 40%-60% of cutting parameter, and suitably improving feed speed, surplus is 0;
Step 5: refine ear top
Milling removal ear top surplus, selecting cutter is flat slotting cutter, and processing mode is climb cutting, and X, Y, Z three-shaft linkage, cutting parameter select 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 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 cutter to recommend the 40%-60% of cutting parameter, and suitably improve feed speed, and surplus is 0.2mm;
Step 7: half essence, fine finishining ear outer wall
Half essence, fine finishining ear outer wall, selecting cutter 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 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 is flat milling cutter with wiper edges, the same step 1 of tool diameter, the Y-axis offset arranges to be needed to determine 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 finally completed whole processing.
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| CN104015015B (en) * | 2014-06-23 | 2016-04-06 | 四川明日宇航工业有限责任公司 | Aircraft main landing gear urceolus part by numerical control integrated manufacturing method |
| 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 |
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| 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 |
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