CN114669961A - Forming method of aluminum alloy large thick-wall special-shaped shell - Google Patents
Forming method of aluminum alloy large thick-wall special-shaped shell Download PDFInfo
- Publication number
- CN114669961A CN114669961A CN202210195080.5A CN202210195080A CN114669961A CN 114669961 A CN114669961 A CN 114669961A CN 202210195080 A CN202210195080 A CN 202210195080A CN 114669961 A CN114669961 A CN 114669961A
- Authority
- CN
- China
- Prior art keywords
- forming
- enveloping body
- aluminum alloy
- target object
- target
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
A method for forming a large aluminum alloy thick-wall special-shaped shell comprises the following steps: firstly, segmenting a target object according to the outline shape of the target object and forming a plurality of target units with consistent appearance characteristics; enveloping each target unit and preparing an enveloping body uniquely corresponding to the target unit; step three, lofting each enveloping body and obtaining cutting and forming parameters; cutting the plate according to the forming parameters, and then bending the cut plate; and fifthly, finishing and welding the bent plate according to the size of the target object. The present invention can be produced using existing equipment capabilities. The invention is put into practical production, and can prepare the special-shaped shell based on the existing production capacity, thereby improving the production capacity and bearing more complex tasks. In addition, the invention reduces the investment of the die and greatly reduces the production cost of the special-shaped shell.
Description
Technical Field
The invention belongs to the technical field of metal workpiece forming, and particularly relates to a forming method of a large aluminum alloy thick-wall special-shaped shell.
Background
For large-sized special-shaped parts, the conventional forming method is difficult to manufacture parts meeting the requirements due to the complex surface structure of the special-shaped parts.
For example, in the prior art, a large-sized complex curved surface shell part is generally formed by pressing through a forming die. For those skilled in the art, the use cost of the large complex curved surface shell part forming mold is very high, and cannot be borne by common manufacturers. Further, since parts similar to such large-sized complex curved surface housings are very rare in the field of molding, there is a problem that the investment in manufacturing cost is extremely high and the use rate of the mold is low.
Disclosure of Invention
Problem (A)
In summary, how to solve the problems of high investment cost and low utilization rate of manufacturing molds of large-sized and special-shaped shell structure parts in the prior art becomes a problem to be solved urgently by those skilled in the art.
(II) technical scheme
The invention provides a method for forming a large aluminum alloy thick-wall special-shaped shell, which comprises the following steps:
firstly, segmenting a target object according to the outline shape of the target object and forming a plurality of target units with consistent appearance characteristics;
Enveloping each target unit and preparing an enveloping body uniquely corresponding to the target unit;
thirdly, lofting each enveloping body and obtaining cutting and forming parameters;
cutting the plate according to the forming parameters, and then bending the cut plate;
and fifthly, finishing and welding the bent plate according to the size of the target object.
Preferably, in the method for forming the large thick-walled special-shaped aluminum alloy shell, in the first step, the target object is segmented along the axial direction of the target object, and then each segment is segmented along the circumferential direction to form a plurality of target units with curved surface structures.
Preferably, in the method for forming the large-sized thick-walled special-shaped aluminum alloy shell, in the second step, an aluminum plate is used as an enveloping body raw material, and the thickness of the enveloping body raw material is greater than that of the target unit.
Preferably, in the method for forming a large-sized thick-walled special-shaped aluminum alloy shell, in the second step, the enveloping body raw material is selected and then rolled into an elliptic cone shape.
Preferably, in the method for forming the large aluminum alloy thick-wall special-shaped shell, in the third step, the enveloping body which is rolled into the elliptic cone shape is lofted by adopting a triangular lofting technology.
Preferably, in the method for forming the large-sized thick-walled special-shaped aluminum alloy shell provided by the invention, in the third step, the surface of the enveloping body which is rolled into the elliptic cone shape is divided into triangles, the side length of all the triangles is obtained, the lofting size group of the enveloping body is obtained, then the lofting size groups of the enveloping body corresponding to the target units at the same section are sequentially spliced and operated along the axial direction, and the lofted structure is unfolded and the cutting forming parameters are obtained.
Preferably, in the method for forming the large aluminum alloy thick-wall special-shaped shell, in the fourth step, the plate is cut by adopting a water cutting mode.
Preferably, in the method for forming the large aluminum alloy thick-wall special-shaped shell, an oil press is adopted to bend the cut plate along the lofting bus.
Preferably, in the method for forming the large aluminum alloy thick-wall special-shaped shell, the bent plate is calibrated, and the calibration tool used for calibration comprises at least two calibration curved surfaces which are relatively fixed and eccentric.
Preferably, in the method for forming the large aluminum alloy thick-wall special-shaped shell, in the fifth step, the bent elliptical cone sheet is firstly placed on a machine tool for alignment, and a reference surface is milled at one end; then, the inner and outer shapes are milled by a ball cutter by using a datum plane mounting clamp for alignment, and the wall thickness is ensured; and finally, milling peripheral and longitudinal grooves and finally welding.
(III) advantageous effects
The invention provides a method for forming a large aluminum alloy thick-wall special-shaped shell, which comprises the following steps: firstly, segmenting a target object according to the outline shape of the target object and forming a plurality of target units with consistent appearance characteristics; enveloping each target unit and preparing an enveloping body uniquely corresponding to the target unit; step three, lofting each enveloping body and obtaining cutting and forming parameters; cutting the plate according to the forming parameters, and then bending the cut plate; and fifthly, finishing and welding the bent plate according to the size of the target object.
The method for forming the large aluminum alloy thick-wall special-shaped shell realizes the forming of the special-shaped shell, has novel design concept, is simple and convenient to operate, is easy to operate and form plates, and can be used for producing the plates by using the existing equipment capacity. The invention is put into practical production, and can prepare the special-shaped shell based on the existing production capacity, thereby improving the production capacity and bearing more complex tasks. In addition, the invention reduces the investment of the die and greatly reduces the production cost of the special-shaped shell.
Drawings
FIG. 1 is an axial view of a target object in an embodiment of the invention;
FIG. 2 is a side view of a target object in an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating segmentation of a target object according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating segmentation of segment A of a target object according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a target unit after segmentation of segment A of a target object according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating an envelope after enveloping a target unit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of lofting of an envelope after lofting according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a calibration fixture in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In addition, in the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
Please refer to fig. 1 to 8, wherein fig. 1 is an axial view of a target object according to an embodiment of the present invention; FIG. 2 is a side view of a target object in an embodiment of the present invention; FIG. 3 is a schematic diagram of segmenting a target object according to an embodiment of the present invention; FIG. 4 is a schematic diagram illustrating segmentation of segment A of a target object according to an embodiment of the present invention; FIG. 5 is a schematic diagram of a target unit after segmentation is performed on segment A of a target object according to an embodiment of the present invention; FIG. 6 is a schematic diagram of an envelope after enveloping a target unit according to an embodiment of the present invention; FIG. 7 is a schematic diagram of lofting of an envelope after lofting according to an embodiment of the present invention; fig. 8 is a schematic structural diagram of a calibration fixture in an embodiment of the present invention.
The invention provides a method for forming an aluminum alloy large thick-wall special-shaped shell, which is suitable for barrel-shaped components, namely hollow components (the middle space of the components has no structure), has a certain wall thickness and has a set external profile shape (the external surface shape is set).
In the invention, the method for forming the aluminum alloy large thick-wall special-shaped shell comprises the following steps:
firstly, segmenting the target object according to the contour shape of the target object (the segmentation mode is to cut the target object along the axial direction of the target object) and forming a plurality of appearance features (the appearance features refer to the shape features of a target unit formed after segmentation, for example, the appearance features of the target unit are gradually enlarged or gradually reduced in a certain direction if the target unit is in a truncated cone shape), wherein the appearance features are consistent target units (if the appearance changes obviously, the appearance features are inconsistent, for example, the caliber is gradually enlarged and then gradually reduced in a certain direction, the appearance features are inconsistent, or if the caliber gradually enlarged and changed in a certain direction is smaller, and then the change rate is larger, the appearance features are inconsistent).
Further, in the first step, the target object is segmented along the axial direction of the target object, and then each segment is segmented along the circumferential direction to form a plurality of target units of the curved surface structure.
In the industrial field, even a special-shaped structural member has a certain design rule, and the external contour shape is not disordered, so that the structural member (defined as a target object in the invention) can be divided, and each divided part has certain external features, such as a smooth curved surface, a plane surface or other regular shapes (such as wave shape). The object in the practical operation of the invention is an eccentric ellipsoid structure, so that the target object can be segmented according to an eccentric inflection point (an eccentric connecting line is not a straight line and is not turned), the axis of the segmented ellipsoid is approximate to a straight line, and the external contour characteristics of each segment (the external contour characteristics refer to the contour shape of each segment) after segmentation are basically consistent.
And step two, enveloping each target unit and preparing an enveloping body uniquely corresponding to the target unit.
Specifically, in the second step, the aluminum plate is used as the raw material of the enveloping body, the thickness of the raw material of the enveloping body is larger than that of the target unit, and after the raw material of the enveloping body is selected, the raw material of the enveloping body is rolled into an elliptic cone shape.
The present invention segments the target object into a plurality of "sheet" structures in step one, and then the present invention employs an aluminum plate (having a thickness greater than the thickness of each sheet structure) as the enveloping body raw material in step two. The aluminum plate may be pre-shaped according to the shape of each sheet structure (target unit), for example, bent into a bent sheet structure similar to the sheet structure, and then a groove structure may be provided on the aluminum plate, which can completely enclose the target unit. Then, the enveloping body is rolled into an elliptic cone shape (the purpose is to facilitate the subsequent lofting operation).
And step three, lofting each enveloping body and obtaining cutting and forming parameters.
Specifically, in the third step, the enveloping body which is coiled into the elliptic cone shape is lofted by adopting a triangular lofting technology. Further, in the third step, the surface (elliptical ring surface) of the enveloping body which is rolled into the elliptical cone shape is divided by adopting a triangle, the side length of all the triangles is obtained, an enveloping body lofting size group is obtained, then the enveloping body lofting size groups corresponding to the target units at the same section are sequentially spliced and operated along the axial direction, and the lofted structure is unfolded and cutting forming parameters are obtained.
And step four, cutting the plate according to the forming parameters, and then bending the cut plate.
Specifically, in the fourth step, the plate is cut by adopting a water cutting mode.
Specifically, an oil press is adopted to bend the cut plate along the lofting bus. In addition, the bent plate is calibrated, and the calibration tool used for calibration comprises at least two calibration curved surfaces which are relatively fixed and eccentric.
As can be seen from the above, the present invention performs axial segmentation on the target object based on the segmentation according to the eccentricity inflection point, that is, two adjacent segments must be eccentric. Therefore, the calibration tool provided by the invention comprises at least two eccentric calibration curved surfaces, and can calibrate the curved surfaces of two adjacent segments.
And fifthly, finishing and welding the bent plate according to the size of the target object. In the fifth step, firstly, the bent elliptic conical sheet is placed on a machine tool for alignment, and a reference surface is milled at one end; then, the inner and outer shapes are milled by a ball cutter by using a datum plane mounting clamp for alignment, and the wall thickness is ensured; and finally, milling peripheral and longitudinal grooves and finally welding.
In one embodiment of the invention, a certain type of product is taken as an example, the maximum diameter of the product is 2.4 meters, the overall shape of the product is like a small airplane, and the external shape is mostly streamline. Since the product is a special-shaped component (and a shell-type part), the forming difficulty of the large complex shell is very high. By analyzing the shape of the product of the model, the product can be determined to be of a variable cross section (the shapes of the axial cross sections are different), an ellipse (the axial cross sections are all elliptical) and an eccentric (the centroids of the elliptical structures of the axial cross sections are not coaxially arranged). The front ellipse size of the product is 2087.5 multiplied by 2084.3, the rear section value of the product is a gradual change ellipse structure, the section ellipses are eccentric in a certain sequence, the size of the tail ellipse is 1773.3 multiplied by 1462.8, the maximum eccentricity is 58.4, the total length of the shell is 1440mm, and the overall wall thickness is 25 mm.
According to the structure and the product requirement of a target product (the target product refers to a product of a certain type), and according to the method provided by the invention, the following processing scheme is established:
1. the product is divided into 12 pieces by integrating the product structure, bending, machining and welding processes. The product is divided into three sections along the axial direction of the product, each section is divided into four parts by circumferential truncation, and the three sections are four parts or twelve parts.
As shown in FIG. 3, the product is divided into three sections (three sections A \ B \ C in FIG. 1) along the axial direction of the product in FIG. 3.
As shown in FIG. 4, the segment A is divided into four pieces along the circumferential direction in FIG. 4, which are respectively A1\ A2\ A3\ A4.
2. Enveloping the curved surface (each slice), specifically enveloping each of the truncated slice structures. Through three-dimensional analysis and research on each sheet, the invention adopts a 40mm thick aluminum plate (the thickness of the adopted aluminum plate must be larger than the maximum thickness of a target product, in addition, the invention can also adopt other metal materials as an enveloping body), and the aluminum plate is rolled into an elliptic cone (the cone is the enveloping body) to envelop each curved surface respectively, so that the curved surfaces can be enveloped.
3. And lofting the envelope. Since the target product in the present invention has an irregular shape, the developed size and shape of the target product cannot be calculated by a conventional method. For this purpose, the invention uses a triangular lofting technique to loft the envelope (elliptical cone shape).
The specific lofting operation is as follows: the lofting operation was performed using CAD software, dividing each envelope (elliptical cone) into a number (64) of small triangles, and recording by measuring the length of three sides of each small triangle. Then, 64 small triangles are connected in sequence according to the positions of the enveloping bodies (elliptic cones), a lofting drawing of each section of the enveloping bodies (elliptic cones) is drawn, and the expansion size and the shape of each section are approximately obtained (the following drawing). And cutting corresponding sizes at the positions of the sheets in the lofting drawing, adding machining allowance to obtain the water cutting and blanking size of the product, and blanking according to the shape of the drawing.
4. And bending the plate.
According to the shape and curvature change of a product, a set of bending tool is designed, and the bending tool is fixed on a 350-ton open type oil press. And (4) performing water cutting blanking according to the lofting size of the blank (the lofting size of the enveloping body), and then scribing a compression datum line on the surface of the aluminum plate. In the present invention, the bus bar of the proof chart is used as a reference for the profiling. And placing an aluminum plate in the middle of the upper die and the lower die, wherein the datum line on the aluminum plate is aligned with the central line of the die. The stroke of the oil press is adjusted to drive the upper die to move up and down, and the pressure of the oil press is utilized to deform the aluminum plate. And adjusting the central line of the next datum line die of the aluminum plate to align, adjusting the upper die to perform profiling, and repeatedly bending. The profiling process is a very tedious process, and the position of the die and the plate needs to be adjusted repeatedly to ensure the forming.
5. Alignment with template: in order to verify that the shape of the bend meets the design requirements, a template as shown in fig. 8 was designed. The template is characterized in that front and back two different enveloping ellipses of each section are connected by a middle screw rod, an eccentric elliptical cone is formed in space, and a three-dimensional template is formed according to the inner size of the enveloping elliptical cone. The shape of the bent shape is compared by using the template, and if the bent shape completely conforms to the template, the bent shape is considered to form an enveloping elliptic cone.
6. Adding the internal and external shapes to each chip. Firstly, placing a bent elliptic conical sheet on a machine tool for alignment, and milling a reference surface at one end; then, the inner and outer shapes are milled by a ball cutter by using a datum plane mounting clamp for alignment, and the wall thickness is ensured; and finally milling peripheral and longitudinal grooves.
7. Welding to form the enclosure. Punching the reinforcing ribs, connecting the reinforcing ribs according to the correct positions of a drawing to form an inner form, butting four machined reinforcing ribs into a surrounding shell, welding a fixed block, fixing the position by using the fixed block, and welding a longitudinal welding line to form the shell. And then butt-welding each section into a surrounding shell.
Therefore, the invention provides a method for forming a large aluminum alloy thick-wall special-shaped shell, which comprises the following steps: firstly, segmenting a target object according to the outline shape of the target object and forming a plurality of target units with consistent appearance characteristics; enveloping each target unit and preparing an enveloping body uniquely corresponding to the target unit; step three, lofting each enveloping body and obtaining cutting and forming parameters; cutting the plate according to the forming parameters, and then bending the cut plate; and fifthly, finishing and welding the bent plate according to the size of the target object.
The method for forming the large aluminum alloy thick-wall special-shaped shell realizes the forming of the special-shaped shell, has novel design concept and simple and convenient operation, is easy to operate and form plates, and can be used for producing the plates by using the existing equipment capacity. The invention is put into practical production, and can prepare the special-shaped shell based on the existing production capacity, thereby improving the production capacity and bearing more complex tasks. In addition, the invention reduces the investment of the die and greatly reduces the production cost of the special-shaped shell.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (10)
1. A method for forming a large aluminum alloy thick-wall special-shaped shell is characterized by comprising the following steps:
firstly, segmenting a target object according to the outline shape of the target object and forming a plurality of target units with consistent appearance characteristics;
Enveloping each target unit and preparing an enveloping body uniquely corresponding to the target unit;
thirdly, lofting each enveloping body and obtaining cutting and forming parameters;
cutting the plate according to the forming parameters, and then bending the cut plate;
and step five, finishing and welding the bent plate according to the size of the target object.
2. The method of claim 1,
in the first step, the target object is segmented along the axial direction of the target object, and then each segment is segmented along the circumferential direction to form a plurality of target units with curved surface structures.
3. The forming method of large thick-walled special-shaped aluminum alloy shell according to claim 1,
in the second step, an aluminum plate is used as an enveloping body raw material, and the thickness of the enveloping body raw material is greater than that of the target unit.
4. A large-scale thick-walled special-shaped aluminum alloy shell molding method according to claim 3,
in the second step, after the enveloping body raw material is selected, the enveloping body raw material is rolled into an elliptic cone shape.
5. The method of claim 4, wherein the aluminum alloy is formed into a large thick-walled special-shaped shell,
in the third step, the enveloping body which is coiled into the elliptic cone shape is lofted by adopting a triangular lofting technology.
6. The method of claim 5, wherein the aluminum alloy is formed into a large thick-walled special-shaped shell,
in the third step, the surface of the enveloping body which is rolled into the elliptic cone shape is divided by adopting a triangle, the side length of all the triangles is obtained, the lofting size group of the enveloping body is obtained, then the lofting size groups of the enveloping body corresponding to the target units at the same section are sequentially spliced and operated along the axial direction, and the lofted structure is unfolded to obtain the cutting forming parameters.
7. The forming method of large thick-walled special-shaped aluminum alloy shell according to claim 6,
and in the fourth step, the plate is cut in a water cutting mode.
8. The method of claim 6,
and bending the cut plate along the lofting bus by using an oil press.
9. The forming method of large thick-walled special-shaped aluminum alloy shell according to claim 8,
The bent plate is calibrated, and a calibration tool used for calibration comprises at least two calibration curved surfaces which are fixed relatively and eccentric.
10. The method of claim 1,
in the fifth step, firstly, the bent elliptic conical sheet is placed on a machine tool for alignment, and a reference surface is milled at one end of the elliptic conical sheet; then, the inner and outer shapes are milled by a ball cutter for alignment by mounting and clamping the reference surface, and the wall thickness is ensured; and finally milling peripheral and longitudinal grooves and finally welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210195080.5A CN114669961B (en) | 2022-03-01 | 2022-03-01 | Method for forming large aluminum alloy thick-wall special-shaped shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210195080.5A CN114669961B (en) | 2022-03-01 | 2022-03-01 | Method for forming large aluminum alloy thick-wall special-shaped shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114669961A true CN114669961A (en) | 2022-06-28 |
| CN114669961B CN114669961B (en) | 2023-03-14 |
Family
ID=82071582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210195080.5A Active CN114669961B (en) | 2022-03-01 | 2022-03-01 | Method for forming large aluminum alloy thick-wall special-shaped shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114669961B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2092246A1 (en) * | 1992-03-24 | 1993-09-25 | Jean-Michel Deramaux | Process for assembling two face to face end portions and break-off link obtained with such process |
| US5501011A (en) * | 1992-05-18 | 1996-03-26 | Societe Europeenne De Propulsion | Method of manufacture of an enclosure containing hot gases cooled by transportation, in particular the thrust chamber of a rocket engine |
| CN104007697A (en) * | 2014-05-05 | 2014-08-27 | 上海交通大学 | Five-axis multi-row flank milling cutter position planning method |
| EP2987963A1 (en) * | 2014-08-21 | 2016-02-24 | Honeywell International Inc. | Fan containment system for a gas turbine and corresponding method of manufacture |
| CN105817841A (en) * | 2016-04-21 | 2016-08-03 | 重庆通用工业(集团)有限责任公司 | Special-shaped pipe forming method |
| CN110153643A (en) * | 2019-04-15 | 2019-08-23 | 浙江大学 | A kind of increase and decrease material manufacturing process accumulated error removing method |
| WO2020147860A1 (en) * | 2019-01-14 | 2020-07-23 | 蓝箭航天空间科技股份有限公司 | Method for forming nozzle component of aerospace engine |
| CN112719556A (en) * | 2021-01-15 | 2021-04-30 | 山西汾西重工有限责任公司 | Hyperbolic conic section shell and forming method |
| CN113878300A (en) * | 2021-09-27 | 2022-01-04 | 重庆大学 | Porous structure connection method for additive manufacturing |
-
2022
- 2022-03-01 CN CN202210195080.5A patent/CN114669961B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2092246A1 (en) * | 1992-03-24 | 1993-09-25 | Jean-Michel Deramaux | Process for assembling two face to face end portions and break-off link obtained with such process |
| US5501011A (en) * | 1992-05-18 | 1996-03-26 | Societe Europeenne De Propulsion | Method of manufacture of an enclosure containing hot gases cooled by transportation, in particular the thrust chamber of a rocket engine |
| CN104007697A (en) * | 2014-05-05 | 2014-08-27 | 上海交通大学 | Five-axis multi-row flank milling cutter position planning method |
| EP2987963A1 (en) * | 2014-08-21 | 2016-02-24 | Honeywell International Inc. | Fan containment system for a gas turbine and corresponding method of manufacture |
| CN105817841A (en) * | 2016-04-21 | 2016-08-03 | 重庆通用工业(集团)有限责任公司 | Special-shaped pipe forming method |
| WO2020147860A1 (en) * | 2019-01-14 | 2020-07-23 | 蓝箭航天空间科技股份有限公司 | Method for forming nozzle component of aerospace engine |
| CN110153643A (en) * | 2019-04-15 | 2019-08-23 | 浙江大学 | A kind of increase and decrease material manufacturing process accumulated error removing method |
| CN112719556A (en) * | 2021-01-15 | 2021-04-30 | 山西汾西重工有限责任公司 | Hyperbolic conic section shell and forming method |
| CN113878300A (en) * | 2021-09-27 | 2022-01-04 | 重庆大学 | Porous structure connection method for additive manufacturing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114669961B (en) | 2023-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110802153B (en) | Deep drawing forming process for aluminum alloy deep paraboloid cylindrical part | |
| CN110293167B (en) | SUV automobile back door outer plate drawing technical surface modeling method | |
| CN102581051A (en) | Cold extrusion forming method for lute hole of axle housing of automobile drive axle and pressing die forming machine tool | |
| CN105643210A (en) | Golf ball head structure and production process thereof | |
| CN109622760A (en) | It is a kind of for the tool heads of progressive molding, design method and progressive molding method | |
| CN103752707A (en) | Die and method for forming straight tube section-expansion section composite titanium alloy equal-wall-thickness curved generatrix thin wall rotation body component | |
| CN114669961B (en) | Method for forming large aluminum alloy thick-wall special-shaped shell | |
| CN110941900A (en) | Blade forging prefabricated blank design method capable of accurately controlling material flow distribution | |
| CN112474856B (en) | Extruded section shape correction die and shape correction method thereof | |
| CN110014065A (en) | A kind of composite forming die and method of half tube components of wall buckling of dehiscing | |
| CN203917599U (en) | A kind of symmetry tubes interlude bending and forming mould | |
| CN106392501B (en) | A kind of processing method of Streamlined thin-wall metallic implants | |
| CN102728696B (en) | Numerical control multiple spot dieless hydro-bulging technique and numerical control multiple spot dieless hydro-bulging equipment | |
| CN105880332A (en) | Hydraulic hollow tube springback control method and device | |
| CN217512858U (en) | Shaping die designed based on improvement of machining precision | |
| CN207857575U (en) | A kind of adjustable apparatus for bending of metal plate bending angle | |
| CN102161059B (en) | NC bending core head for thin walled tube of aluminum alloy with major diameter and design method thereof | |
| CN113857781A (en) | Gas-collecting hood and forming method thereof | |
| CN110421077B (en) | Composite forming method of component with large-angle thin-wall twisted narrow-deep-cavity characteristic | |
| CN113020904A (en) | Method and equipment for manufacturing C-shaped inner-opening thin-wall metal annular part | |
| CN206794406U (en) | Aluminum alloy heat extrudes replaceable mold cores | |
| CN117840324B (en) | Forming method and device for continuous variable-section thin-wall cabin shell | |
| CN220387653U (en) | Processing die for shaping of stay wire shell | |
| CN110449484B (en) | Thin-wall large-resilience component forming tool and forming method | |
| CN103551419B (en) | A kind of asymmetric pipe processing method adopting transition state mould |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |