CN113927151B - Characteristic friction stir material increase manufacturing method and equipment for reinforcing rib of thin-wall cylinder structure - Google Patents
Characteristic friction stir material increase manufacturing method and equipment for reinforcing rib of thin-wall cylinder structure Download PDFInfo
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- CN113927151B CN113927151B CN202111287063.6A CN202111287063A CN113927151B CN 113927151 B CN113927151 B CN 113927151B CN 202111287063 A CN202111287063 A CN 202111287063A CN 113927151 B CN113927151 B CN 113927151B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/1215—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding for other purposes than joining, e.g. built-up welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/129—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding specially adapted for particular articles or workpieces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides a characteristic friction stir additive manufacturing method and equipment for a large thin-wall cylinder structure reinforcing rib, wherein the friction stir additive manufacturing equipment adopting the principle of coaxially conveying bars into a hollow stirring tool is used for forming each layer of reinforcing rib on the existing thin-wall structures such as a cylinder bottom, a cylinder section and the like, and the reinforcing rib structures are stacked layer by layer from low to high to complete the complete reinforcing rib structure, wherein the thin wall means that the thickness of the cylinder structure is not less than 1mm, and the method is suitable for the condition that the ratio of the thickness of the reinforcing rib to the wall thickness of the cylinder exceeds 1:1, in particular to the forming of a topological optimized special-shaped reinforcing rib structure, and belongs to the field of the rapid forming and manufacturing of aerospace large-scale light material structural parts. The thin-wall cylinder reinforcing rib structure prepared by the method has the advantages of fine grain size, mechanical property reaching the level of a forging piece with the same component, no heat affected area weak area on the base material, short product development period, high material utilization rate and capability of greatly improving the processing efficiency of large aerospace light structural parts.
Description
Technical Field
The invention belongs to the technical field of rapid forming, and particularly relates to a friction stir material additive manufacturing method and equipment for a large thin-wall cylinder structure reinforcing rib of a space vehicle.
Background
At present, carrier rockets are mostly large thin-wall high-rib barrel structures, the traditional method of barrel section structures mostly adopts piece processing and tailor welding to form, and barrel bottom structures adopt integrated spin forming or melon petal piece processing and tailor welding to form. The reinforcing rib features with lower height on the cylinder structure are generally obtained by cutting thick plates, which causes a great deal of material waste and consumes a great deal of machining working hours, and also improves the preparation difficulty of raw materials. The high strengthening rib of height accessible fusion welding or stir welding concatenation are added, but when strengthening rib wall thickness was greater than the barrel wall thickness, the stir welding process was difficult to operate, and the fusion welding heat input is great, easily forms weakening areas such as heat affected zone on the substrate, welds the substrate even. Particularly, for the special-shaped reinforcing rib characteristics generated by adopting innovative structural design methods such as topological optimization and the like, the traditional processing method is more difficult to be sufficient. In order to meet the requirements of low cost, short period and high quality manufacturing of a carrier rocket barrel structure product, an innovative aerospace large-scale thin-wall barrel structure development method is urgently needed in the face of the increasingly dense carrier rocket launching task requirements.
The additive manufacturing technology can quickly respond to the design requirements of structural products, has the advantages of short development period, high material utilization rate and the like, and provides a new idea for the short-process and high-quality integrated preparation of the reinforcing rib features of the large thin-wall cylinder structure of the aerospace craft. The rib plate is formed without machining cutting, the thickness of base materials of the cylinder bottom cylinder section such as spinning and tailor welding is reduced, the material utilization rate is high, the period is shortened, the problem of high-quality welding of a high-rib thin-wall structure is solved, and the integral forming of the rib plate structure is realized. However, in the traditional fusion welding additive manufacturing methods such as laser additive manufacturing and electric arc additive manufacturing, the mechanical properties of a formed part are generally lower than those of a forged piece base material, the thin-wall structure is easy to deform due to large heat input, the forming efficiency is low, and particularly for light material structural parts such as aluminum alloy and magnesium alloy, the traditional additive manufacturing methods are difficult to form with high quality.
Disclosure of Invention
In order to solve the problems, the invention provides a method and equipment for manufacturing a large-scale thin-wall cylinder structure reinforcing rib characteristic friction stir additive of a space vehicle, wherein the technical scheme is as follows:
a friction stir material increase manufacturing method for reinforcing rib characteristics of a large thin-wall cylinder structure is characterized in that the cylinder is manufactured by other methods such as spinning and tailor welding, the thickness of the cylinder structure is not less than 1mm, and the ratio of the wall thickness of the reinforcing rib to the wall thickness of the cylinder exceeds 1:1, characterized in that: the reinforcing rib structure is formed by additive manufacturing layer by layer on the cylinder base material through surfacing;
carrying out reinforcement rib forming on each layer on the existing thin-wall structures such as a cylinder bottom, a cylinder section and the like by using a stirring friction additive manufacturing technology in a mode of coaxially conveying bars into a hollow stirring tool, and preparing a complete reinforcement rib structure by overlaying layer by layer from low to high;
when forming, different rib plates in the same surfacing layer are welded one by one according to the principle of symmetrical and uniform distribution, the adjacent surfacing layers adopt opposite welding directions, and a single rib plate can be formed in a single-pass mode or in a multi-pass tailor-welding mode according to the size relation between the thickness of the rib plate and the width of the surfacing channels.
Furthermore, the downward pressure is 1000N-30000N, the surfacing speed is 2 mm/s-10 mm/s, the surfacing inclination angle is 0-4 degrees, the bar is aluminum alloy or magnesium alloy with a square cross section and a side length of 2 mm-15 mm, the feeding speed is 4 mm/s-15 mm/s, the width of the welding channel is 5 mm-60 mm, and the thickness of the layer is 2 mm-5 mm.
Further, the method specifically comprises the following steps:
step 5, lifting the stirring tool by 2-5 mm, selecting a symmetrical point of a forming starting point of the first rib plate layer as a first surfacing starting point of the second layer, and forming different rib plates in the second surfacing layer according to the principle that the sequence is the same as that of the first surfacing layer and the forming direction is opposite;
the surfacing welding in the steps 3 to 6 is Friction stir additive manufacturing (Friction stir additive-FSA), the Friction stir additive manufacturing technology utilizes a mode of coaxially conveying a bar material into a hollow stirring tool to stir, friction and form, namely, the bar material with a square cross section is coaxially conveyed into the hollow stirring tool under the action of a push rod, huge forging pressure is generated between the bar material and a substrate, meanwhile, the hollow stirring tool rotates at a high speed to drive the square bar material and the substrate to generate heat through Friction, and further plasticization is performed, the plasticized material forms a surfacing welding layer under the forging and pressing action of a stirring tool shaft shoulder, a forming track is planned based on three-dimensional digital-analog layered slicing data, and the full-compact three-dimensional reinforcing rib characteristic is directly manufactured on a cylinder structure.
Further, the plasticized material forms a surfacing layer under the forging and pressing action of a shaft shoulder of a stirring tool, the downward pressure of the stirring tool is 1000N-30000N, the surfacing speed is 2 mm/s-10 mm/s, the surfacing inclination angle is 0-4 degrees, the bar is aluminum alloy or magnesium alloy with a square cross section and a side length of 2 mm-15 mm, the feeding speed is 4 mm/s-15 mm/s, the width of a welding channel is 5 mm-60 mm, and the thickness of the layer is 2 mm-5 mm.
Further, the structures such as the cylinder bottom, the cylinder section and the like can be manufactured by spinning, tailor welding and other technological methods, and the materials are aluminum alloy or magnesium alloy;
further, the tool can rigidly fix the cylinder bottom and the cylinder section, and is provided with a driving mechanism which can rotate in an indexing manner.
The invention also provides a large-scale thin-wall cylinder structure reinforcing rib characteristic friction stir material increase manufacturing device of the aerospace craft, which comprises the following components: the device comprises a stand column, a longitudinal guide rail, a longitudinal driving device, a rocker arm, a transverse guide rail, a transverse driving device, a stirring friction additive manufacturing tool head and a tool head swinging device. The tool head swinging device is arranged on the transverse guide rail through a sliding block, the friction stir additive manufacturing tool head is fixed on the tool head swinging device, and the friction stir additive manufacturing tool head is driven by the transverse driving device to move transversely. The stirring friction material increase manufacturing equipment is equipped with different frock according to the difference of required machined part structure, and the cylinder bottom structure configuration hemisphere frock (cylinder bottom frock) is located the rocking arm bottom, and the frock bottom is furnished with the rotating electrical machines, and section of thick bamboo structure configuration annular frock (section of thick bamboo frock), inside the rocking arm inserted annular frock, annular frock bottom had rotary mechanism.
Furthermore, the longitudinal working stroke of the device is 0-4000 mm, the feeding speed is 0-20 mm/s, the transverse working stroke is 0-3000 mm, the feeding speed is 0-20 mm/s, the included angle between the swing angle range of the tool head and the vertical direction is-60 degrees, the rotating speed range of the tool head is 100-2000 rpm, the stepless speed regulation is realized, and the longitudinal downward pressure of the tool head is 0-40000N.
The invention adopts the stirring friction additive manufacturing method to form the reinforcing rib characteristics of the large thin-wall cylinder structure of the aerospace craft, can obtain good forming quality, and has the following beneficial effects:
(1) The chemical components of the structure of the surfacing formed rib plate are uniform, and the grain size is superior to that of the base material of the forge piece;
(2) The mechanical property of the surfacing forming structural part reaches the level of a forge piece, and the surfacing forming structural part has excellent mechanical property and no anisotropy;
(3) The forming process of light materials such as aluminum alloy, magnesium alloy and the like does not need inert atmosphere protection, and the production is carried out in an open environment, so that the method is suitable for the manufacturing environment of large light structural members;
(4) The rib plate structure is integrally formed, so that the structural strength of the product is improved;
(5) Compared with the traditional processing technology of the cylinder structure of the aerospace craft, the rib plate does not need to be machined, cut and formed, the thickness of base materials of the cylinder bottom cylinder section such as spinning and tailor-welding is reduced, the material utilization rate is greatly improved, the processing time is reduced, the problem of high-quality welding of a high-rib thin-wall structure is solved, the processing difficulty and cost are reduced, mechanical performance weakening areas such as a welding heat affected zone are eliminated, the overall performance of a product is improved, and the requirement trend of low-cost, short-period and high-quality manufacturing of a large aerospace light structural member product is met;
(6) The design requirements of the cylinder structure of the aerospace craft are quickly responded, structural innovation design methods such as topology optimization of the reinforcing rib characteristics of the cylinder structure are adapted, and the digitization, the intellectualization and the parallelization of part manufacturing are realized;
(7) Compared with the traditional additive manufacturing technology, the forming efficiency is improved by more than 10 times, and the energy utilization rate is high.
Drawings
FIG. 1 is a schematic structural diagram of a large thin-wall cylinder of a spacecraft, wherein (a) is a cylinder bottom and (b) is a cylinder section, and in the diagram, 1 is a reinforcing rib feature, 2 is a cylinder bottom base material and 3 is a cylinder section base material;
fig. 2 is a schematic diagram of a friction stir additive manufacturing device and a forming principle, in which 4 is a column, 5 is a longitudinal guide rail, 6 is a machine tool base, 7 is a longitudinal driving device, 8 is a rocker arm, 9 is a transverse driving device, 10 is a friction stir additive manufacturing tool head, 11 is a transverse guide rail, 12 is a tool head swinging device, 13 is a hollow stirring tool, 14 is a forming overlaying layer, 15 is a base material, and 23 is a bar material;
fig. 3 is a schematic view of a characteristic forming device for a reinforcing rib with a cylinder bottom structure, wherein 4 is an upright column, 6 is a machine tool base, 8 is a rocker arm, 10 is a stirring friction additive manufacturing tool head, 16 is a cylinder bottom with the reinforcing rib, 17 is a hemispherical tool, 18 is a hemispherical tool base, and 19 is a tool rotating motor;
FIG. 4 is a schematic view of a characteristic friction stir additive manufacturing process for a drum bottom stiffener;
fig. 5 is a schematic view of a characteristic forming device for a reinforcing rib with a cylinder section structure, wherein 1 is a reinforcing rib, 3 is a cylinder section base material, 4 is a column, 6 is a machine tool base, 8 is a rocker arm, 10 is a friction stir additive manufacturing tool head, 20 is an annular tool, 21 is a tool rotating mechanism, and 22 is an annular tool base;
FIG. 6 is a schematic view of a barrel section reinforcing bar feature friction stir additive manufacturing process.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
the manufacturing method comprises the following steps of uniformly distributing 3 reinforcing ribs with the width of 15mm and the height of 30mm in an aluminum alloy cylinder bottom structure with the outer diameter of 2712mm and the wall thickness of a cylinder body of 5mm as shown in fig. 1a, conveying a bar 23 into a hollow stirring tool 13 by using a coaxial conveying manner to generate huge forging pressure with a substrate under the action of lower pressure F1, simultaneously driving the square bar 23 to generate heat with the substrate 15 by virtue of high-speed rotation of the hollow stirring tool 13 so as to plasticize the square bar, forming a build-up welding layer 14 by virtue of plasticized material under the action of stirring tool shaft shoulder forging pressure F2, and forming each layer of reinforcing ribs on an existing cylinder bottom thin-wall structure by virtue of the stirring friction material-adding manufacturing equipment at least comprising a stand column 4, a longitudinal guide rail 5, a machine tool base 6, a longitudinal driving device 7, a rocker arm 8, a transverse driving device 9, a stirring friction material-adding manufacturing tool head 10, a transverse guide rail 11 and a tool head swinging device 12, wherein the complete build-up welding reinforcing rib structure is prepared from low to high by virtue of the following specific steps:
(1) Fixing the existing cylinder bottom structure by using a hemispherical fixture 17 (shown in fig. 3), fig. 4a;
(2) Slicing the rib plate structure 1 to be formed in a layered manner, and planning a motion track, as shown in figure 4;
(3) Setting process parameters, filling a consumable bar 23, positioning an initial welding point on the bottom of the cylinder, and starting a first layer of a first rib plate, wherein in the step b, a stirring friction additive manufacturing tool head 10 moves along an arc track under the action of a tool head swinging device 12 and a transverse driving device 9;
(4) The hemispherical tool 17 is shifted and rotated under the action of the tool rotating motor 19, different rib plates in the first surfacing layer are formed one by one according to the principle of symmetrical uniform distribution, and the first surfacing layer is formed in fig. 4c, and fig. 4d;
(5) Lifting the stirring tool by 2mm, selecting a symmetrical point of a forming starting point of the first rib plate layer as a first surfacing starting point of the second rib plate layer, and forming different rib plates in the second surfacing layer according to the principle that the sequence is the same as that of the first surfacing layer and the forming direction is opposite, wherein the steps are shown in fig. 4e, 4f and 4g;
(6) Repeating the steps (3) to (5), completing the surfacing of 15 layers of rib plate structures, and finally forming a complete reinforcing rib structure by 15 layers of reinforcing ribs, wherein the figure is 4i;
and (3) performing friction stir material increase manufacturing on the surfacing in the steps (3) to (6), wherein the side length of the section of the bar is 10mm, the downforce of a stirring tool is 10000N, the surfacing speed is 2mm/s, the surfacing inclination angle is 0, the feeding speed is 5mm/s, the width of a welding channel is 20mm, and the thickness of the layer is 2mm.
Example two:
as shown in fig. 1b, the aluminum alloy cylinder segment structure has an outer diameter of 3020mm, a cylinder wall thickness of 10mm, a reinforcing rib structure width of 15mm, a circumferential reinforcing rib height of 50mm, 8 radial triangular plate reinforcing ribs are uniformly distributed at 45 degrees and have a height of 30mm, as shown in fig. 2, a friction stir additive manufacturing method and equipment thereof are adopted for forming, a coaxial conveying bar 23 is used for entering a hollow stirring tool 13, a huge forging pressure is generated between the coaxial conveying bar 23 and a substrate under the action of a lower pressure F1, meanwhile, the hollow stirring tool 13 rotates at a high speed to drive the square bar 23 and the substrate 15 to generate heat through friction, and further plasticization is performed, a plasticized material forms a build-up layer 14 under the action of a stirring tool shoulder forging pressure F2, the friction stir additive manufacturing equipment at least comprises a stand column 4, a longitudinal guide rail 5, a machine tool base 6, a longitudinal driving device 7, a rocker arm 8, a transverse driving device 9, a friction stir additive manufacturing tool head 10, a transverse guide rail 11 and a tool head swinging device 12, each layer of reinforcing rib is formed on an existing cylinder bottom thin-wall structure, and a complete reinforcing rib structure is prepared from a low-to-up layer, and the high-up layer, and the concrete steps are as follows:
(1) The existing barrel section structure is secured using an annular fixture 20 (shown in fig. 5), fig. 6a;
(2) Slicing the rib plate structure 1 to be formed in a layered manner, and planning a motion track, as shown in fig. 6;
(3) Setting process parameters, filling a consumable bar 23, positioning an initial welding point on the cylinder section, starting a first layer of first circumferential rib plates, and rotating the annular tool 20 under the action of a tool rotating mechanism 21 in the figure 6 b;
(4) Forming radial rib plates in the first surfacing layer one by one according to a symmetrical and uniform distribution principle, finishing forming the first surfacing layer according to a figure 6c, and enabling the stirring friction additive manufacturing tool head 10 to move transversely under the action of the transverse driving device 9;
(5) Lifting the stirring tool by 2mm, selecting a symmetrical point of a forming starting point of the first rib plate layer as a first surfacing starting point of the second rib plate layer, and forming different rib plates in the second surfacing layer according to the principle that the sequence is the same as that of the first surfacing layer and the forming direction is opposite, and obtaining the graphs shown in fig. 6d and 6e;
(6) Repeating the steps (3) to (5) to finish the surfacing of 15 layers of rib plate structures, and fig. 6g;
(7) Repeating the step (3), completing surfacing of the remaining 10 layers of rib plate structures, and finally forming a complete reinforcing rib structure by 25 layers of reinforcing ribs in a graph 6h, and in a graph 6j;
and (3) performing friction stir material increase manufacturing on the surfacing in the steps (3) to (7), wherein the side length of the section of the bar is 10mm, the downforce of a stirring tool is 10000N, the surfacing speed is 2mm/s, the surfacing inclination angle is 0, the feeding speed is 5mm/s, the width of a welding channel is 20mm, and the thickness of the layer is 2mm.
It should be noted that the foregoing is only illustrative and illustrative of the present invention, and that any modifications and alterations to the present invention are within the scope of the present invention as those skilled in the art will recognize.
Claims (6)
1. The utility model provides a thin wall tube structure strengthening rib characteristic friction stir material increase manufacturing method which characterized in that, tube structure includes barrel head structure, section of thick bamboo structure and strengthening rib structure, tube structure thickness is not less than 1mm, and the ratio of strengthening rib structure wall thickness and tube structure wall thickness exceeds 1:1, respectively forming a reinforcing rib structure on a cylinder bottom structure and a cylinder section structure through additive manufacturing layer by layer build-up welding;
the method comprises the following steps:
step 1, respectively adopting a cylinder bottom tool and a cylinder section tool to fix a cylinder bottom structure and a cylinder section structure;
step 2, slicing the rib plate structure to be formed in a layering manner, and planning a motion track;
step 3, setting process parameters, filling consumable bar materials, positioning an initial stacking welding point on the cylinder bottom and the cylinder section, and starting to form a first layer of first rib plates;
step 4, forming different rib plates in the first surfacing layer one by one according to the principle of symmetrical uniform distribution to finish forming the first surfacing layer;
step 5, lifting the hollow stirring tool by 2mm to 5mm, selecting a symmetrical point of a forming starting point of the first rib plate layer as a first surfacing starting point of the second rib plate layer, and forming different rib plates in the second surfacing layer according to the principle that the sequence is the same as that of the first surfacing layer and the forming direction is opposite;
step 6, repeating the steps 4 and 5, completing the formation of the surfacing layers of the rest rib plate structures, and finally forming a complete reinforcing rib structure by the rib plate surfacing layers, wherein the rib plate surfacing layers are at least 2;
the surfacing welding in the steps 3 to 6 is stirring friction additive manufacturing, and a complete reinforcing rib structure is prepared by surfacing welding layer by layer from low to high;
the down pressure of the hollow stirring tool is 1000N to 30000N, the build-up welding speed is 2mm/s to 10mm/s, the build-up welding inclination angle is 0 to 4 degrees, the bar is an aluminum alloy or magnesium alloy with a square cross section and side lengths of 2mm to 15mm, the feeding speed is 4mm/s to 15mm/s, the welding channel width is 5mm to 60mm, and the layer thickness is 2mm to 5mm;
the cylinder bottom structure and the cylinder section structure are manufactured by a spinning or tailor-welding process method, and the cylinder bottom structure and the cylinder section structure are made of aluminum alloy or magnesium alloy.
2. The method for manufacturing the thin-wall cylinder structure reinforcing rib characteristic friction stir additive according to claim 1, wherein the cylinder bottom tool and the cylinder section tool are rigidly fixed with the cylinder bottom structure and the cylinder section structure and provided with a driving mechanism for indexing rotation.
3. The equipment for manufacturing the reinforcing rib characteristic stirring friction additive of the thin-wall cylinder structure is applied to the method for manufacturing the reinforcing rib characteristic stirring friction additive of the thin-wall cylinder structure according to any one of claims 1 to 2, and comprises the following steps: the device comprises a stand column, a longitudinal guide rail, a longitudinal driving device, a rocker arm, a transverse guide rail, a transverse driving device, a stirring friction additive manufacturing tool head and a tool head swinging device;
the vertical column is arranged on a machine tool base, the longitudinal guide rail is arranged on the side face of the vertical column, the rocker arm is arranged on the longitudinal guide rail through the sliding block and is perpendicular to the longitudinal guide rail, the longitudinal driving device is used for driving the rocker arm to move vertically, the transverse guide rail is arranged on the rocker arm, the tool head swinging device is arranged on the transverse guide rail through the sliding block, the friction stir additive manufacturing tool head is fixed on the tool head swinging device, and the friction stir additive manufacturing tool head is driven by the transverse driving device to move transversely.
4. The equipment for manufacturing the thin-wall cylinder structure reinforcing rib characteristic friction stir additive according to claim 3, wherein the equipment for manufacturing the thin-wall cylinder structure reinforcing rib characteristic friction stir additive is provided with different tools according to different structures of workpieces to be machined; the tool comprises a cylinder bottom tool and a cylinder section tool; the cylinder bottom structure is provided with a cylinder bottom tool which is positioned at the bottom of the rocker arm, and the bottom of the cylinder bottom tool is provided with a rotating motor; the barrel section structure is provided with a barrel section tool, the rocker arm is inserted into the barrel section tool, and the bottom of the barrel section tool is provided with a rotating mechanism.
5. The equipment for manufacturing the thin-wall cylinder structure reinforcing rib characteristic friction stir additive according to claim 4, wherein the cylinder bottom tool is a hemispherical tool, and the cylinder section tool is an annular tool.
6. The equipment for the feature-based friction-stir additive manufacturing of the thin-walled cylinder-structure reinforcing rib according to claim 5, wherein the equipment for the feature-based friction-stir additive manufacturing of the thin-walled cylinder-structure reinforcing rib has a longitudinal working stroke of 0 to 4000mm, a feeding speed of 0 to 20mm/s, a transverse working stroke of 0 to 3000mm, a feeding speed of 0 to 20mm/s, a tool head swing angle range of-60 to 60 degrees from a vertical direction, a tool head rotation speed range of 100rpm to 2000rpm, stepless speed regulation, and a tool head longitudinal downward pressure of 0 to 40000N.
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| CN115519136B (en) * | 2022-10-09 | 2024-05-17 | 哈尔滨工业大学（威海） | Additive manufacturing device and hollow part solid-phase additive manufacturing method |
| CN115921899B (en) * | 2023-03-09 | 2023-05-26 | 中国科学院近代物理研究所 | Manufacturing method of titanium alloy thin-wall reinforcing rib extremely-high vacuum chamber |
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| CN110834179A (en) * | 2019-11-13 | 2020-02-25 | 西安交通大学 | Axial continuous path friction stir material increase manufacturing process for large thin-wall high-cylinder ring piece |
| CN113305301A (en) * | 2021-05-18 | 2021-08-27 | 北京工业大学 | Composite manufacturing equipment and method based on melting deposition and semi-solid stirring |
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