CN118455944A - Manufacturing method of hollow blade - Google Patents
Manufacturing method of hollow blade Download PDFInfo
- Publication number
- CN118455944A CN118455944A CN202410654538.8A CN202410654538A CN118455944A CN 118455944 A CN118455944 A CN 118455944A CN 202410654538 A CN202410654538 A CN 202410654538A CN 118455944 A CN118455944 A CN 118455944A
- Authority
- CN
- China
- Prior art keywords
- blade
- manufacturing
- blade blank
- plate
- core plate
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 47
- 238000003466 welding Methods 0.000 claims abstract description 15
- 238000005452 bending Methods 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 29
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 235000013871 bee wax Nutrition 0.000 description 3
- 239000012166 beeswax Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000005495 investment casting Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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
- B23P15/02—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention discloses a manufacturing method of a hollow blade, which comprises the steps of firstly cutting raw materials to form a blade blank; then, placing the blade blank on a bending machine to extrude to form an included angle part; placing the blade blank on a press machine, inserting a core plate into the blade blank, and shaping; and then taking out the core plate, and then welding the blade blank body, thereby completing the manufacture of the hollow blade. The manufacturing method of the hollow blade has the advantages of high production efficiency, high yield and low production cost, and can further meet the production requirements of an industrial assembly line.
Description
Technical Field
The invention relates to the technical field of fans, in particular to a manufacturing method of a hollow blade.
Background
At present, a lost wax casting method is adopted for manufacturing the hollow blade, and the specific flow is as follows: an inner core is first prepared, which is prepared by crushing and shaping porcelain clay and then sintering the porcelain clay into a fused quartz ceramic core. Next, lost wax casting techniques are used to fabricate the blade. In this process, the prepared inner core is wrapped with beeswax. The beeswax is then melted and flowed out by heating, leaving a cavity matching the shape of the leaf. Thereafter, molten metal is injected into this cavity formed by the core and the mold. The metal cools and solidifies in the cavity, forming the outer structure of the blade. Once the metal cools and solidifies, the core may be removed by chemical dissolution or other means, leaving a hollow interior structure. Finally, the cast blade is subjected to the necessary post-treatments including cleaning, trimming and heat treatment to ensure that its performance and appearance meet the standards.
However, the whole casting process has high process complexity, each link needs to be accurately controlled, the technical requirement is high, and the complexity increases the uncertainty and risk in the production process. Since lost wax casting involves multiple steps and each step requires time to complete, the overall production process is relatively long. This results in low production efficiency and increased production costs. Meanwhile, a plurality of links can cause defects or disqualification of the blade, so that the rejection rate is relatively high, and the manufacturing cost of the required inner core is high. These further increase production costs and have an impact on production efficiency.
Disclosure of Invention
The invention aims to provide a manufacturing method of a hollow blade, which effectively improves production efficiency and yield and reduces production cost.
The aim of the invention can be achieved by the following technical scheme:
A method of manufacturing a hollow blade, comprising;
step 1, cutting raw materials through a punch to form an integrated blade blank with two plate parts;
step 2, placing the blade blank on a concave die of a bending machine, wherein the front end surface of one plate part is propped against a limiting piece in front of the concave die, and positioning the blade blank so that the joint of the two plate parts is just below a pressing cutter;
step 3, after the bending machine drives the pressing knife to descend, the pressing knife contacts with the joint of the two plate parts and presses the pressing knife into the groove of the lower female die, so that an included angle part is formed after the two plate parts are mutually close;
step 4, placing the blade blank on a workbench of a press, clamping a core plate by a manipulator, inserting the core plate between two plate parts, enabling the front end of the core plate to prop against the inner side of an included angle part of the blade blank, and forcing the outer side of the included angle part to prop against a stop piece in front of the workbench, so as to finish positioning the blade blank;
Step 5, the pressing machine drives the pressing die to descend, the pressing die contacts with the outer surface of the upper side plate part and presses the upper side plate part to swing downwards until the inner surface of the upper side plate part and the inner surface of the lower side plate part are respectively attached to the core plate, the preset time is stopped to shape the blade blank, at the moment, the part of the rear part of the upper side plate part protruding out of the core plate is contacted with the part of the rear part of the lower side plate part protruding out of the core plate to form a joint surface, then the pressing die is driven to ascend for h1 distance, after the core plate is taken out, the pressing die is driven to descend for h2 distance, and then spot welding is carried out on the joint surface;
Step 6, lifting and pressing the die, taking out the blade blank, placing the blade blank at a welding tool, and fully welding the joint surface of the blade blank along the longitudinal direction by a welding robot so as to finish the manufacturing of one hollow blade;
in step5, the h1 distance is equal to the h2 distance.
The existing casting process involves multiple links such as preparation of the inner core, beeswax package surface, metal casting, inner core removal and the like. Because of the high process complexity, precise control is required in each link, which increases the uncertainty and risk in the production process. By adopting the technical scheme, the manufacturing method of the hollow blade can directly cut out a required blade blank, then, an included angle part is formed by extruding two plate parts of the blade blank, then, a chip is inserted into the blade blank for extrusion shaping, then, a core plate is taken away, and welding is performed, so that the manufacturing of the hollow blade is completed. Simple operation, high production efficiency, high yield and reduced production cost. In addition, the distance of the lifting h1 of the pressing die is equal to the distance of the descending h2 of the pressing die. Thus, when the core plate is inserted into the blade blank body, the size of the cavity formed when the press machine extrudes and shapes the blade blank body is the same as the size of the cavity formed when the press machine extrudes and shapes the blade blank body again after the core plate is taken away, so that the consistency of all hollow blades is ensured.
In summary, the manufacturing method of the hollow blade has the advantages of high production efficiency, high yield and low production cost, and can further meet the production requirements of an industrial assembly line.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of the hollow vane of the present invention;
FIG. 2 is a schematic view of the structure of a blade blank of the present invention;
FIG. 3 is a view showing placement of a blade blank on a concave mold with the front face of one plate abutting against a stop in front of the concave mold, the junction of the two plates being located just below the press blade;
FIG. 4 is a view showing the two plate portions being brought together to form an angled portion;
FIG. 5 is a stop showing the core inserted between two plate portions against the angled portion and urging the angled portion against the front of the table;
Fig. 6 is a view showing the press driving the lower die to descend after the core plate is taken out;
FIG. 7 is a view showing the two plate portions being pressed into contact to form a joint surface;
Fig. 8 is a schematic structural view of the core plate of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to FIG. 1, there is shown a hollow vane 10 obtained by a method of manufacturing a hollow vane in accordance with the present invention. In the present embodiment, the hollow vane 10 is made of an aluminum alloy material. The aluminum alloy material has the advantages of light weight, high strength, corrosion resistance, easy processing and forming, environmental protection, sustainability and the like.
The specific manufacturing method comprises the following steps of;
as shown in fig. 2, in step 1, the raw material is cut by a punch press, and a blade blank 11 having two plate portions 12 integrally formed is obtained by cutting.
As shown in fig. 3, in step 2, the blade blank is placed on a lower die 20 of a bending machine, the front end surface of one plate 12 abuts against a limiting piece 21 in front of the lower die 20, and the blade blank 11 is positioned so that the joint of the two plate 12 is located right below a pressing knife 22.
As shown in fig. 3, the upper surface of the lower die 20 has a concave arc-shaped groove 23 extending in the longitudinal direction, and the pressing blade 22 is fitted with the groove 23. The hold-down knife 22 has a circular arc-shaped cutting edge.
As shown in fig. 3 and 4, after the bending machine drives the pressing knife 22 to descend in step 3, the pressing knife 22 contacts the joint of the two plate portions 12 first and presses the joint into the groove 23 of the lower die 20, so that the two plate portions 12 are close to each other to form an included angle portion 13.
As shown in fig. 4, in the present embodiment, the included angle formed by the included angle portion 13 is smaller than 90 °. In this way, the blade blank 11 forming the included angle part is placed on a press machine, so that the press machine is convenient for carrying out subsequent extrusion molding on the blade blank 11.
As shown in fig. 5,6, 7 and 8, step 4, the blade blank is placed on a workbench 30 of a press, and then the core plate 9 is clamped by a manipulator and inserted between two plate portions 12, so that the front end of the core plate 9 abuts against the inner side of an included angle portion 13 of the blade blank 11, and the outer side of the included angle portion is forced against a stop member 31 in front of the workbench 30, thereby completing positioning of the blade blank 11 on the press.
As shown in fig. 7 and 8, in the present embodiment, the core plate is made of die steel. The die steel has high hardness, strength, wear resistance and enough toughness. The thickness of the core plate 9 gradually decreases from the front end to the rear end in the axial direction. The front end of the core plate 9 is an arc surface. Here, the width of the core plate 9 in the longitudinal direction is greater than the width of the blade blank in the longitudinal direction, so that a manipulator can clamp the part of the core plate 9 exceeding the transverse width of the blade blank conveniently, the core plate is inserted between two plate parts 12 of the blade blank 11, and the front end of the core plate 9 is an arc surface and is tightly attached to the inner side surface of the included angle part 13.
As shown in fig. 5, 6 and 7, step 5, the press drives the lower die 32 to descend, the lower die 32 is firstly contacted with the outer surface of the upper side plate 12 and swings downward against the upper side plate until the inner surface of the upper side plate 12 and the inner surface of the lower side plate 12 are respectively adhered to the corresponding surfaces of the core plate 9, the predetermined time is stopped to shape the blade blank, wherein the part of the rear part of the upper side plate 12 protruding from the core plate 9 is contacted with the part of the rear part of the lower side plate 12 protruding from the core plate 9 to form a joint surface 14, then the lower die 32 is driven to ascend for h1 distance, the core plate 9 is taken out, then the lower die 32 is driven to descend for h2 distance, and then the joint surface 14 is spot-welded.
Here, the predetermined time is 5s, and the h1 distance is equal to the h2 distance. The pressing die 32 is raised by a distance h1, and the core plate 9 can be removed by the distance h1, and in this embodiment, the distances h1 and h2 are each 1mm. Thereupon, the pressing die 32 is lowered by a further h2 distance to fix the two spot welds on the joint surface. The purpose of this is to ensure that when the core 9 is inserted into the blade blank 11, the size of the cavity formed when the press presses the shaped blade blank 11 is the same as the size of the cavity formed inside when the press presses the shaped blade blank 11 again after the core is taken away. Thereby ensuring the consistency of the hollow blade manufactured by the following steps. In addition, a stopper step is provided at both the rear edge of the bottom surface of the pressing die 32 and the rear edge of the surface of the table 30. The upper stop step and the lower stop step are used for limiting the vane blank 11 to move backwards in the extrusion shaping process, so that the consistency of the hollow vane is affected. As shown in fig. 7, there is a protruding portion 121 extending rearward beyond the rear edge of the upper side plate portion at the rear edge of the lower side plate portion 12. The structure facilitates welding the bonding surface during the welding process. Of course, a press machine with two-way, that is, an upper workbench and a lower workbench capable of moving simultaneously can be used, and only the upper workbench and the lower workbench of the two-way press machine are needed to press the blade embryo, then stop for 5 seconds for shaping, then the upper workbench and the lower workbench are oppositely moved for 0.5mm in the vertical direction, the core mould is taken out, then the upper workbench and the lower workbench are oppositely moved for 0.5mm in the vertical direction, and then two points of the joint surface spot welding are fixed.
As shown in fig. 1, in step 6, the mold 32 is raised and pressed, the blade blank 11 is taken out and placed at the welding tool, and the bonding surface 14 of the blade blank 11 is fully welded in the longitudinal direction by the welding robot, so as to complete the manufacture of a hollow blade 10.
In summary, the manufacturing method of the hollow blade has the advantages of high production efficiency, high yield and low production cost, and can further meet the production requirements of an industrial assembly line.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (8)
1. A method of manufacturing a hollow vane, comprising;
step 1, cutting raw materials through a punch to form an integrated blade blank with two plate parts;
step 2, placing the blade blank on a concave die of a bending machine, wherein the front end surface of one plate part is propped against a limiting piece in front of the concave die, and positioning the blade blank so that the joint of the two plate parts is just below a pressing cutter;
step 3, after the bending machine drives the pressing knife to descend, the pressing knife contacts with the joint of the two plate parts and presses the pressing knife into the groove of the lower female die, so that an included angle part is formed after the two plate parts are mutually close;
step 4, placing the blade blank on a workbench of a press, clamping a core plate by a manipulator, inserting the core plate between two plate parts, enabling the front end of the core plate to prop against the inner side of an included angle part of the blade blank, and forcing the outer side of the included angle part to prop against a stop piece in front of the workbench, so as to finish positioning the blade blank;
Step 5, the pressing machine drives the pressing die to descend, the pressing die contacts with the outer surface of the upper side plate part and presses the upper side plate part to swing downwards until the inner surface of the upper side plate part and the inner surface of the lower side plate part are respectively attached to the core plate, the preset time is stopped to shape the blade blank, at the moment, the part of the rear part of the upper side plate part protruding out of the core plate is contacted with the part of the rear part of the lower side plate part protruding out of the core plate to form a joint surface, then the pressing die is driven to ascend for h1 distance, after the core plate is taken out, the pressing die is driven to descend for h2 distance, and then spot welding is carried out on the joint surface;
Step 6, lifting and pressing the die, taking out the blade blank, placing the blade blank at a welding tool, and fully welding the joint surface of the blade blank along the longitudinal direction by a welding robot so as to finish the manufacturing of one hollow blade;
in step5, the h1 distance is equal to the h2 distance.
2. The method of manufacturing a hollow vane according to claim 1, wherein the distances of h1 and h2 in step5 are both 1mm, and the predetermined time is 5s.
3. A method of manufacturing a hollow vane according to claim 1, wherein the included angle formed by the included angle portion in step 3 is less than 90 °.
4. The method of manufacturing a hollow vane according to claim 1, wherein the thickness of the core plate is gradually reduced from a front end to a rear end in the axial direction, and the front end of the core plate is an arc surface.
5. The method of manufacturing a hollow vane according to claim 1, wherein the width of the core plate in the longitudinal direction is larger than the width of the vane blank in the longitudinal direction.
6. The method of manufacturing a hollow vane according to claim 1, wherein the core plate is made of die steel.
7. The method of manufacturing a hollow vane according to claim 1, wherein in step 5, the rear edge of the lower side plate portion has a convex portion extending rearward beyond the rear edge of the upper side plate portion.
8. The method of manufacturing a hollow blade according to claim 1, wherein the hollow blade is an aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410654538.8A CN118455944A (en) | 2024-05-24 | 2024-05-24 | Manufacturing method of hollow blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410654538.8A CN118455944A (en) | 2024-05-24 | 2024-05-24 | Manufacturing method of hollow blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118455944A true CN118455944A (en) | 2024-08-09 |
Family
ID=92151337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410654538.8A Pending CN118455944A (en) | 2024-05-24 | 2024-05-24 | Manufacturing method of hollow blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118455944A (en) |
-
2024
- 2024-05-24 CN CN202410654538.8A patent/CN118455944A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN118455944A (en) | Manufacturing method of hollow blade | |
| CN112091139B (en) | Combined die forging process for automobile cross arm and blank type | |
| JPS61201926A (en) | Yoke member and its manufacture of iuniversal joint | |
| CN102989947A (en) | Compound insulator ball socket armor clamp forging and molding process | |
| CN111673397B (en) | Forming process of wide chord hollow blade | |
| CN111408912B (en) | Preparation method and clamping tool for small-diameter narrow-gap thin-wall multi-blade component | |
| CN101254517A (en) | Silumin piston contour forging technique and mold | |
| CN206500483U (en) | Semi-closed port workpiece Trimming Die | |
| CN212285567U (en) | Machining equipment for thrust ball pin | |
| CN113523234B (en) | Lightweight aluminum alloy die casting die | |
| CN113172190B (en) | Forging forming method | |
| CN209753899U (en) | Copper alloy floor drain body forging flattening trimming one-time forming equipment | |
| CN210334174U (en) | Y-shaped automatic forming device for grabbing nails | |
| CN109807574B (en) | Manufacturing process of combined die | |
| CN209466612U (en) | One kind automatically cutting off material strip injection mold | |
| CN114147160B (en) | Forging method for irregular lifting lug forming along with forming | |
| CN114192710B (en) | Irregular lifting lug forming device | |
| CN207508034U (en) | A kind of bending mould for all kinds of vehicle frame main beams | |
| CN214488325U (en) | A mould for sheet metal processing | |
| CN214184936U (en) | Tensile mould convenient to clear material | |
| CN106111870B (en) | Forge gear die and its forging technology | |
| CN219966646U (en) | Cutting device for glove mould body joint | |
| CN209577851U (en) | A kind of mold for two side blows welding arc gap above and below the long steel pipe of automobile connecting rod product | |
| CN110142916B (en) | Hollow body auxiliary welding tool and hollow body forming method | |
| CN220880701U (en) | Trimming die for aluminum die-casting product |
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 |