CN104439968B - A kind of large-scale tank cylinder section integral manufacturing method based on the milling of numerical control mirror image - Google Patents
A kind of large-scale tank cylinder section integral manufacturing method based on the milling of numerical control mirror image Download PDFInfo
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- CN104439968B CN104439968B CN201410679955.4A CN201410679955A CN104439968B CN 104439968 B CN104439968 B CN 104439968B CN 201410679955 A CN201410679955 A CN 201410679955A CN 104439968 B CN104439968 B CN 104439968B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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Abstract
The invention provides a kind of large-scale tank cylinder section integral manufacturing method based on the milling of numerical control mirror image, it comprises the steps: (1) adopts numerical control wallboard milling machine tool, dull and stereotyped mechanical milling tank wallboard upper and lower surface; (2) adopt filler roll forming method by wallboard bending forming; (3) by the wallboard of several bending formings, friction stir welding is adopted to be welded into cylinder section; (4) to the overall mechanical milling of cylinder section, numerical control mirror image Milling Machining cylinder section wallboard grid is adopted.The present invention adopts cylinder section integral mirror to replace traditional milling, dull and stereotyped mechanical milling and individual bending wallboard numerical control mill grid as milling, realizes milling manufacture method after grid tank Tong Duan XianCheng cylinder, satisfies the demands, and improves tank cylinder section machining accuracy, working (machining) efficiency.
Description
Technical field
The present invention relates to system For Machine-building Process, be specifically related to a kind of large-scale tank cylinder section integral manufacturing method based on the milling of numerical control mirror image.
Background technology
Tank is carrier rocket important component part, needs to bear the overload impact in fuel in pressure, axial compressive force, distortion drag and flight course, and environment for use is severe.It has thin-walled, weak rigidity, one-shot forming without features such as allowance.
Tank cylinder section mainly adopts wallboard roll bending, milling grid, is welded into a process.But, tradition milling scheme, as shown in Figure 1, Problems existing: (1), for traditional milling technique, it is large that chemical corrosion rate controls difficulty, more easily produces excessive erosion or non-uniform corrosion, cause wallboard local appearance point pit or corrosion location partially thin, cause wallboard to corrode and not in placely cause comprehensively super principal-employment, machining accuracy is low, and residual wall thickness tolerance is difficult to control.(2) traditional milling technique necessarily requires round-corner transition, and knuckle R is large, cause useless too much heavy, and wall thickness is super principal-employment payment, so just makes the overall weight of tank greatly increase, has a strong impact on wallboard weight.Be unfavorable for rocket body loss of weight.(3) milling technique can cause a large amount of discharging of waste liquid, the organic matter rubbish large to environmental hazard brought after the use of a large amount of organic gel, and energy waste is serious, and environmental pollution pressure is large.
Tank cylinder section can also adopt number of plates milling grid wallboard scheme, as shown in Figure 2, Problems existing: after (1) sheet material bending and forming, actual profile and theoretical profile exist franchise, and each position Form and position error is inconsistent, and there is same plate difference after plate forming or claim Wall-Thickness Difference, in 0.2-0.5mm scope not etc., and there is difference in distributing position to difference.The design accuracy requirement of wall thickness ± 0.1 can not be met.(2) grid regions is had to the wallboard of the mutation structures such as boss, too high or excessively weak at bending local stiffness, causing distortion inequality or local deformation not, easily there is problems of crack in boss edge.(3) working (machining) efficiency is low, can not meet model demand far away.
Summary of the invention
The object of the present invention is to provide a kind of large-scale tank cylinder section integral manufacturing method based on the milling of numerical control mirror image, to realize the through engineering approaches manufacture of carrier rocket tank cylinder section of the high accuracy of manufacture, high efficiency, low stress.
Realize the technical scheme of the object of the invention: a kind of large-scale tank cylinder section integral manufacturing method based on the milling of numerical control mirror image, it comprises the steps:
(1) adopt numerical control wallboard milling machine tool, dull and stereotyped mechanical milling tank wallboard upper and lower surface, ensure wallboard gross thickness precision ± 0.15mm;
(2) adopt filler roll forming method by step (1) gained wallboard bending forming, bus linearity is 1 ~ 1.5mm, and bus is to the non-perpendicularity 1 ~ 1.5mm of end face; Roll forming parameter is roll bending speed 4 ~ 7m/min, lower roller center distance 500 ~ 700mm, every time volume under pressure 20 ~ 30mm, total volume under pressure 120 ~ 150mm;
(3) by the wallboard of step (2) several bending formings of gained, friction stir welding is adopted to be welded into cylinder section, bus to the non-perpendicularity franchise 1 ~ 3mm of end face, bus nonstraightness franchise 1 ~ 1.5mm, bus nonstraightness 1 ~ 3.5mm within the scope of the 300mm of weld seam both sides;
(4) to the overall mechanical milling of step (3) gained cylinder section, numerical control mirror image Milling Machining cylinder section wallboard grid is adopted, grid residual wall thickness precision ± 0.1mm, grid rib width accuracy ± 0.15mm; Processing adopts helical milling cutter track, cutting speed > 1000m/min, rotating speed 15000 ~ 20000rpm, and cutting-in controls as roughing cutting-in 1 ~ 2mm, fine finishining cutting-in 0.2 ~ 0.5mm.
As above based on a large-scale tank cylinder section integral manufacturing method for numerical control mirror image milling, its step (4) adopts numerical control mirror image Milling Machining cylinder section wallboard grid, and in process, every 5 ~ 10 grids are a processing district, territory, septal area symmetrical machining; For anti-flutter adopts the accurate heat-shrinkable knife handle of HSK63A, polycrystal diamond cutter.
As above based on a large-scale tank cylinder section integral manufacturing method for numerical control mirror image milling, its step (2) wallboard both sides adopt gum filler roll bending method, by filling, ensure the uniformity of wallboard integral thickness; Wallboard zone line also adopts filler, fills the rubber blanket of 1 ~ 2mm at zone line.
Effect of the present invention is:
The present invention adopts cylinder section integral mirror to replace traditional milling, dull and stereotyped mechanical milling and individual bending wallboard numerical control mill grid as milling, realize milling manufacture method after grid tank Tong Duan XianCheng cylinder, meet model demand, improve tank cylinder section machining accuracy, working (machining) efficiency.
The inventive method is compared with milling wallboard, monolithic wallboard Milling Machining, and the processing of overall cylinder section has following advantage: the processing of (1) overall cylinder section compares that milling trellis schemes working (machining) efficiency is high, precision is high, weight loss effect good, non-environmental-pollution; (2) processing of overall cylinder section is compared flat digital controlled milling trellis schemes working (machining) efficiency and is significantly improved, and formed precision is high, low stress; (3) what overall cylinder section was processed is installed conveniently, ratio of rigidity monolithic wallboard own is high, and do not need vacuum adsorption type jig, frock cost reduces greatly; (4) overall cylinder section processing mode of the present invention, overall cylinder section original position is placed, possesses mirror image Milling Machining condition, real time laser can be adopted to follow the tracks of wall thickness measuring, machining accuracy is very high, and the technique adopting ultrasonic measurement to compensate again than the processing of single piece of bent wallboard all improves a lot in certainty of measurement and efficiency.
Accompanying drawing explanation
Fig. 1 is existing a kind of tank cylinder section manufacture method schematic diagram;
Fig. 2 is existing another kind of tank cylinder section manufacture method schematic diagram;
Fig. 3 is a kind of large-scale tank cylinder section integral manufacturing method schematic diagram based on the milling of numerical control mirror image of the present invention.
Fig. 4 is bending forming schematic diagram;
Fig. 5 is for being welded into cylinder section schematic diagram.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, a kind of large-scale tank cylinder section integral manufacturing method based on the milling of numerical control mirror image of the present invention is further described.
A kind of large-scale tank cylinder section integral manufacturing method based on the milling of numerical control mirror image of the present invention, as shown in Figure 3, it comprises the steps:
(1) adopt numerical control wallboard milling machine tool, dull and stereotyped mechanical milling tank wallboard upper and lower surface, ensure wallboard gross thickness precision ± 0.15mm;
(2) as shown in Figure 4, adopt filler roll forming method by step (1) gained wallboard bending forming, bus linearity is 1 ~ 1.5mm (such as: 1mm, 1.2mm or 1.5mm), and bus is to the non-perpendicularity 1 ~ 1.5mm (such as: 1mm, 1.2mm or 1.5mm) of end face;
Roll forming parameter is roll bending speed 4 ~ 7m/min (such as: 4m/min, 5m/min or 7m/min), lower roller center distance 500 ~ 700mm (such as: 500mm, 600mm or 700mm), every time volume under pressure 20 ~ 30mm (such as: 20mm, 25mm or 30mm), total volume under pressure 120 ~ 150mm (such as: 120mm, 130mm or 150mm);
Wallboard both sides adopt gum filler roll bending method, by filling, ensure the uniformity of wallboard integral thickness; Wallboard zone line also adopts filler, fills the rubber blanket of 1 ~ 2mm (such as: 1mm, 1.5mm or 2mm) at zone line, thus the problem of " rousing the heart " in the middle of eliminating.
(3) as shown in Figure 5, by the wallboard of the bending forming of 3 step (2) gained, friction stir welding is adopted to be welded into cylinder section, bus is to the non-perpendicularity franchise 1 ~ 3mm (such as: 1mm, 2mm or 3mm) of end face, bus nonstraightness franchise 1 ~ 1.5mm (such as: 1mm, 1.2mm or 1.5mm), bus nonstraightness 1 ~ 3.5mm (such as: 1mm, 2.0mm or 3.5mm) within the scope of the 300mm of weld seam both sides.
Adopt stirring-head and welding parameter as shown in table 1 below.
Table 1
(4) to the overall mechanical milling of step (3) gained cylinder section, numerical control mirror image Milling Machining cylinder section wallboard grid is adopted, grid residual wall thickness precision ± 0.1mm, grid rib width accuracy ± 0.15mm;
The smooth cutter rail of low curvature realizes high-speed cutting: processing adopts helical milling cutter track, cutting speed > 1000m/min, rotating speed 15000 ~ 20000rpm (such as: 15000rpm, 18000rpm or 20000rpm);
Cutting-in controls: cutting-in controls as roughing cutting-in 1 ~ 2mm (such as: 1mm, 1.5mm or 2mm), fine finishining cutting-in 0.2 ~ 0.5mm (0.2mm, 0.4mm or 0.5mm).
Processing sequence controls: in process, every 5 ~ 10 (such as: 5,6 or 10) grids are a processing district, territory, septal area symmetrical machining;
Anti-flutter: adopt high speed and precision main shaft, adopts the accurate heat-shrinkable knife handle of HSK63A, improves dynamic balance accuracy, reduce vibration; Adopt polycrystalline diamond (PCD) cutter, improve tool life.
The milling of the inventive method overall cylinder section machinery, the accuracy of manufacture is high, efficiency is high, processing is compared monolithic wallboard working (machining) efficiency and is become several times of raisings, mesh free wallboard be shaped and welding quality higher, and overall cylinder section machining mode can adopt real time laser to follow the tracks of distortion, the mirror image measurement means such as ultrasonic wall thickness measuring.
Adopt " cylinder section integral mirror is as milling trellis schemes " comparatively " milling trellis schemes " machining accuracy is high, efficiency is high, pollution-free.And machined grid root R is determined by cutter base angle size, can select by designing requirement, and milling grid root R is determined by trellis depth, therefore weight loss effect is better than milling grid well.
Comparatively " flat digital controlled milling trellis schemes " working (machining) efficiency is higher to adopt " cylinder section integral mirror is as milling trellis schemes ", and wallboard bending forming precision is high, and material residual stress is little.
Comparatively " after wallboard bending forming individual wallboard numerical control mill trellis schemes " Milling Machining grid precision is high to adopt " cylinder section overall bull mirror image milling trellis schemes ", and working (machining) efficiency is high, and welding quality is high.
Claims (3)
1., based on a large-scale tank cylinder section integral manufacturing method for numerical control mirror image milling, it is characterized in that: the method comprises the steps:
(1) adopt numerical control wallboard milling machine tool, dull and stereotyped mechanical milling tank wallboard upper and lower surface, ensure wallboard gross thickness precision ± 0.15mm;
(2) adopt filler roll forming method by step (1) gained wallboard bending forming, bus linearity is 1 ~ 1.5mm, and bus is to the non-perpendicularity 1 ~ 1.5mm of end face; Roll forming parameter is roll bending speed 4 ~ 7m/min, lower roller center distance 500 ~ 700mm, every time volume under pressure 20 ~ 30mm, total volume under pressure 120 ~ 150mm;
(3) by the wallboard of step (2) several bending formings of gained, friction stir welding is adopted to be welded into cylinder section, bus to the non-perpendicularity franchise 1 ~ 3mm of end face, bus nonstraightness franchise 1 ~ 1.5mm, bus nonstraightness 1 ~ 3.5mm within the scope of the 300mm of weld seam both sides;
(4) to the overall mechanical milling of step (3) gained cylinder section, numerical control mirror image Milling Machining cylinder section wallboard grid is adopted, grid residual wall thickness precision ± 0.1mm, grid rib width accuracy ± 0.15mm; Processing adopts helical milling cutter track, cutting speed > 1000m/min, rotating speed 15000 ~ 20000rpm, and cutting-in controls as roughing cutting-in 1 ~ 2mm, fine finishining cutting-in 0.2 ~ 0.5mm.
2. a kind of large-scale tank cylinder section integral manufacturing method based on the milling of numerical control mirror image according to claim 1, it is characterized in that: step (4) adopts numerical control mirror image Milling Machining cylinder section wallboard grid, in process, every 5 ~ 10 grids are a processing district, territory, septal area symmetrical machining; For anti-flutter adopts HSK63A accurate heat-shrinkable knife handle, polycrystal diamond cutter.
3. a kind of large-scale tank cylinder section integral manufacturing method based on the milling of numerical control mirror image according to claim 1, it is characterized in that: step (2) wallboard both sides adopt gum filler roll bending method, by filling, ensure the uniformity of wallboard integral thickness; Wallboard zone line also adopts filler, fills the rubber blanket of 1 ~ 2mm at zone line.
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| CN105081009A (en) * | 2015-09-14 | 2015-11-25 | 江西洪都航空工业集团有限责任公司 | Correction cushion block for large roll-bent skin part |
| CN107617771B (en) * | 2016-07-15 | 2019-07-12 | 首都航天机械公司 | A kind of low deformation processing method of large aluminum alloy thin-walled mesh cylinder section |
| CN106425297B (en) * | 2016-10-14 | 2018-11-23 | 首都航天机械公司 | A kind of outer grid siding numerical control processing technology method |
| CN106853541B (en) * | 2016-11-14 | 2018-11-02 | 首都航天机械公司 | A kind of machining path control method based on mesh cylinder section |
| CN108273880B (en) * | 2017-12-21 | 2019-07-12 | 北京卫星制造厂 | A kind of spherical shape lightweight siding manufacturing process |
| CN110076376B (en) * | 2018-01-25 | 2020-07-03 | 北京理工大学 | Method for processing metal plate and milling machine |
| CN109454406A (en) * | 2018-10-29 | 2019-03-12 | 首都航天机械有限公司 | The tubular siding numerical-control processing method of grid in a kind of band |
| CN109604966B (en) * | 2018-12-27 | 2022-06-07 | 天津航天长征技术装备有限公司 | Integral forming method for storage box barrel section with grid ribs in inner cavity |
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| CN111687592A (en) * | 2020-05-22 | 2020-09-22 | 上海航天精密机械研究所 | Integrated forming method for storage tank barrel section and integrated storage tank barrel section |
| CN111774814B (en) * | 2020-06-27 | 2022-08-16 | 上海航天智能装备有限公司 | Method for processing inner and outer grids of rocket short-shell wall plate |
| CN112743302B (en) * | 2020-12-29 | 2022-05-13 | 天津航天长征火箭制造有限公司 | Method for controlling forming precision of large-diameter-thickness-ratio non-uniform sunken milling grid wallboard |
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Address after: 100076 No. 2 Nanyuan Police East Road, Fengtai District, Beijing Co-patentee after: Shanghai Tuopu CNC Polytron Technologies Inc Patentee after: Capital Aerospace Machinery Company Co-patentee after: China Academy of Launch Vehicle Technology Address before: 100076 No. 2 Nanyuan Police East Road, Fengtai District, Beijing Co-patentee before: Shanghai Putuo Numerical Control Technology Co., Ltd. Patentee before: Capital Aerospace Machinery Company Co-patentee before: China Academy of Launch Vehicle Technology |