CN111873477A

CN111873477A - Manufacturing method and product of composite propeller

Info

Publication number: CN111873477A
Application number: CN202010693347.4A
Authority: CN
Inventors: 郑子衡
Original assignee: Dongguan Haoyu Intelligent Composite Material Co ltd
Current assignee: Dongguan Haoyu Intelligent Composite Material Co ltd
Priority date: 2020-07-17
Filing date: 2020-07-17
Publication date: 2020-11-03

Abstract

The invention discloses a method for manufacturing an integrated composite propeller and a product, comprising the following preforming steps: paving a prepreg sheet according to a preset method to obtain a propeller preform; propeller forming: and (3) putting the propeller preform into a forming die, heating and pressurizing after die assembly, curing and forming, and demolding to obtain the propeller. The composite propeller is manufactured by the manufacturing method. The integrally formed propeller is convenient to manufacture, high in production efficiency and good in stability.

Description

Manufacturing method and product of composite propeller

Technical Field

The invention relates to a manufacturing method of a propeller, in particular to a manufacturing method of a composite propeller and a product.

Background

The propeller is a device for converting the rotating power of an engine into propelling force by rotating blades in air or water, and can be a marine propeller with two or more blades connected with a propeller hub, and the backward surface of each blade is a helicoid or a surface similar to the helicoid. At present, propellers comprise conventional metal propellers and composite propellers, and compared with the conventional metal propellers, the composite propellers have the advantages of light weight, high efficiency, low vibration, seawater corrosion resistance, easiness in maintenance and the like.

In the prior art, the existing composite propeller is generally of a combined structure, that is, a blade and a hub are respectively prepared, then the blade and the hub are assembled in a tenon joint or insertion connection mode, and the like, and the composite propeller is obtained by secondary treatment in a root area. The propeller blade formed after assembly has discontinuous fibers at the blade root and poor connection stability. In addition, the composite material paddle also adopts a co-curing compression molding process, and when the shape of the composite material paddle is irregular, the defects of complex pre-forming layering process, long manufacturing period, high cost and poor product quality exist.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide the manufacturing method of the integrated composite propeller, which can integrally form the propeller, and has the advantages of convenience in manufacturing, high production efficiency and good stability.

The invention also aims to provide the integrated composite propeller obtained by the manufacturing method, which has the characteristics of light weight, simple structure and good connection stability.

One of the purposes of the invention is realized by adopting the following technical scheme:

the manufacturing method of the integrated composite propeller comprises the following steps,

pre-molding: paving a prepreg sheet according to a preset method to obtain a propeller preform;

propeller forming: and (3) putting the propeller preform into a forming die, heating and pressurizing after die assembly, curing and forming, and demolding to obtain the propeller.

Preferably, in the propeller molding step, a hot press is adopted to cure the molding die, the die assembly pressure is 8MPa-12MPa, and the curing temperature of the prepreg sheet is 120-150 ℃.

Preferably, the forming die comprises an upper die, a lower die, a driving assembly and a forming assembly, wherein the driving assembly is used for driving the upper die and the lower die to be closed or opened; the molding assembly comprises a molding insert pin, at least two upper molding blocks and at least two lower molding blocks, the molding insert pin is arranged on the lower die, and the at least two lower molding blocks are arranged on the lower die and wound outside the molding insert pin; the at least two upper forming blocks are correspondingly arranged on the at least two lower forming blocks one by one and are wound outside the forming insert pin; the top end of the lower forming block is provided with a first spiral groove, the bottom end of the upper forming block is provided with a second spiral groove, and the second spiral groove and the first spiral groove are used for matching to form a first cavity matched with a blade structure of the propeller after die assembly; the inner side surfaces of the at least two upper forming blocks and the at least two lower forming blocks are used for enclosing a second cavity with the outer surface of the forming insert pin after die assembly; the first cavity and the second cavity are communicated with each other.

Preferably, one end of the lower forming block is provided with a positioning groove, and the positioning groove is positioned below the end part of the first spiral groove; the other end of the lower forming block is provided with a first positioning block, and the first positioning block is arranged at the end part of the first spiral groove far away from the positioning groove; the first positioning block of one lower molding block is used for being embedded in the positioning groove of the adjacent lower molding block in a sliding mode during mold closing.

Preferably, one end of the upper forming block is provided with a positioning step, the other end of the upper forming block is formed into a second positioning block, and the second positioning block of one upper forming block is used for being abutted to the positioning step during die assembly.

Preferably, a third spiral groove is formed in the positioning step, and the third spiral groove is used for being communicated with the first spiral groove when the mold is closed and matched with the second spiral groove to form the first cavity.

Preferably, the inner side surface of the lower forming block is provided with a first spiral forming surface, the inner side surface of the upper forming block is provided with a second spiral forming surface, the first spiral forming surface and the second spiral forming surface are used for being spirally connected and forming a forming surface when the die is closed, and the forming surface is used for forming the outer surface of the insert pin to form the second cavity in a matched manner; the molding surface is gradually screwed inwards from bottom to top.

Preferably, the bottom end of the inner side of the lower forming block is provided with a forming step, and the forming step is used for abutting against the outer surface of the forming insert pin during die assembly.

Preferably, a first knocking groove is formed in the top end of the upper forming block; and a second knocking groove is formed in the top end of the lower forming block.

The second purpose of the invention is realized by adopting the following technical scheme:

the composite propeller is manufactured by the manufacturing method for one of the purposes of the invention.

Compared with the prior art, the invention has the beneficial effects that: the composite material propeller obtained by the manufacturing method has the characteristics of light weight, simple structure, good stability and convenient processing.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial schematic view of the present invention;

FIG. 3 is a schematic structural view of a molding assembly of the present invention;

FIG. 4 is a schematic structural view of a lower forming block of the present invention;

FIG. 5 is a schematic structural view of an upper forming block of the present invention;

FIG. 6 is a schematic view of an upper mold block according to the present invention from another perspective;

fig. 7 is a schematic view of the structure of the composite propeller of the present invention.

In the figure: 10. an upper die; 20. a lower die; 30. a molding assembly; 31. a lower forming block; 311. a first spiral groove; 312. a first spiral forming surface; 313. positioning a groove; 314. a first positioning block; 315. a second guide hole; 316. a second tapping groove; 32. an upper forming block; 321. a second spiral forming surface; 322. positioning a step; 323. a third spiral groove; 324. a first guide hole; 325. a first tapping recess; 326. a second spiral groove; 40. a propeller; 41. a hub; 42. a paddle; 43. a hollow part; 44. and (4) a step.

Detailed Description

The present invention is further described with reference to the accompanying drawings and specific embodiments, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict. Except as specifically noted, the materials and equipment used in this example are commercially available. Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.

In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "connected," "communicating," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a connection through an intervening medium, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1:

In the embodiment, in the propeller molding step, a hot press is used for curing the molding die, the die assembly pressure is 8-12 MPa, and the curing temperature of the prepreg sheet is 120-150 ℃.

In this embodiment, referring to fig. 1 to 6, the forming mold includes an upper mold 10, a lower mold 20, a driving assembly, and a forming assembly 30, and the upper mold 10 and the lower mold 20 can be closed and opened by the driving assembly.

The molding assembly 30 includes a molding insert pin, at least two upper molding blocks 32 and at least two lower molding blocks 31, the molding insert pin is disposed on the lower mold 20, the at least two lower molding blocks 31 are wound outside the molding insert pin, and the at least two upper molding blocks 32 are disposed on the at least two lower molding blocks 31 in a one-to-one correspondence. Similarly, at least two upper forming blocks 32 are wound around the insert.

In addition, a first spiral groove 311 is formed in the top end of the lower forming block 31, a second spiral groove 326 is correspondingly formed in the bottom end of the upper forming block 32, when the mold is closed, the second spiral groove 326 and the first spiral groove 311 can be matched to form a first cavity, the first cavity is matched with a blade structure of a propeller, and at least two groups of upper forming blocks 32 and lower forming blocks 31 can correspondingly form at least two first cavities. In addition, after the mold is closed, the inner sides of the at least two upper molding blocks 32 and the at least two lower molding blocks 31 and the outer surface of the molding insert pin can enclose a second cavity, and the first cavity and the second cavity are communicated with each other, so that only two first cavities can be enclosed on the periphery of the second cavity.

On the basis of the structure, during molding, at least two lower molding blocks 31 can move close to the molding insert pins, composite material prepreg sheets to be molded can be laid in each first spiral groove 311, then mold closing operation is carried out, at least two upper molding blocks 32 are placed on the at least two lower molding blocks 31, and each upper molding block 32 is close to each other and surrounds the periphery of the molding insert pin, so that the first spiral grooves 311 of the at least two lower molding blocks 31 can be correspondingly matched with the second spiral grooves 326 of the at least two upper molding blocks 32 to form at least two first cavities, the at least two upper molding blocks 32 and the inner side surfaces of the at least two lower molding blocks 31 and the outer surface of the molding insert pin surround a second cavity, and the composite material prepreg sheets in the first cavity and the second cavity can form a propeller prepreg body.

During concrete molding, through last mould 10 pressure heating, combined material preimpregnation piece can flow in first die cavity and second die cavity, can the paddle 42 structure of shaping screw 40 in the first die cavity, the propeller hub 41 structure of second die cavity shaping screw 40, because each first die cavity and second die cavity link up, therefore fashioned each paddle 42 is direct with fashioned propeller hub 41 structural connection, integrated into one piece screw 40, need not the later stage equipment, both reducible screw 40's production efficiency, can improve fashioned product structural stability again.

It should be noted that the first spiral groove 311 may extend from top to bottom, so that the blade structure of the formed propeller may be a spiral blade, and the forming insert is located inside the hub during forming, so that the hub is formed into the hollow portion 43 structure, thereby facilitating connection between the propeller and the external structure at a later stage.

Of course, the composite material may be a non-metal matrix synthetic resin; reinforcing materials: one of glass fiber, carbon fiber, boron fiber, aramid fiber, silicon carbide fiber and asbestos fiber; more specifically, the composite material can be carbon fiber prepreg cloth or carbon fiber prepreg sheet.

Furthermore, a positioning groove 313 is arranged at one end of the lower molding block 31, the positioning groove 313 can be positioned below the end part of the first spiral groove 311, a first positioning block 314 is arranged at the other end of the lower molding block 31 correspondingly, the first positioning block 314 is arranged at the end part of the first spiral groove 311 far away from the positioning groove 313, when the mold is closed, the lower molding blocks 31 are close to each other to form an insert needle, the first positioning block 314 of one lower molding block 31 can be slidably embedded in the positioning groove 313 of the adjacent lower molding block 31, and the first positioning block 314 can be abutted in the positioning groove 313, so that the two adjacent lower molding blocks 31 form a stable molding structure, and the displacement of each lower molding block 31 in the pressurizing and heating process is prevented.

When two adjacent lower molding blocks 31 are matched with each other, and the first positioning block 314 of one lower molding block 31 is embedded in the positioning groove 313 of the other lower molding block 31, the positioning groove 313 is positioned at the bottom end of the first spiral groove 311, so that the end surface of the lower molding block 31 at the end of the positioning groove 313 can cut off the first cavity during molding, and molded blades are arranged on the hub at intervals.

Furthermore, a positioning step 322 may be further provided at one end of the upper forming blocks 32, and a second positioning block is formed at the other end corresponding to the upper forming blocks 32, so that the second positioning block of one of the upper forming blocks 32 can abut against the positioning step 322 during mold closing, so that two adjacent upper forming blocks 32 form a stable forming structure, thereby preventing displacement of each upper forming block 32 during pressure heating, and the blade after forming can be arranged on the hub at intervals by the same second positioning block abutting against the positioning step 322.

More specifically, the positioning step 322 is provided with a third spiral groove 323, and when the mold is closed, the third spiral groove 323 can penetrate through the first spiral groove 311 and cooperate with the second spiral groove 326 to form a first cavity, so that the blade area formed in this way is larger.

Preferably, the inner side surface of the lower forming block 31 may further be provided with a first spiral forming surface 312, and a second spiral forming surface 321 is correspondingly provided on the inner side surface of the upper forming block 32, when the mold is closed, the first spiral forming surface 312 and the second spiral forming surface 321 are spirally engaged to form a forming surface, and the forming surface is used for forming the outer surface of the insert pin to form a second cavity in a matching manner.

Further, the molding surface is gradually screwed inwards from bottom to top, so that the formed hub structure is gradually reduced from the root to the tip to form a bullet-shaped structure, and the resistance of the hub in the process of sailing can be reduced.

Preferably, a forming step may be further provided at the bottom end of the inner side of the lower forming block 31, and the forming step may abut against the outer surface of the forming insert pin during mold closing, so that the forming step may extend into the second cavity during mold closing, and the bottom end of the formed propeller hub may have a step 44 for facilitating assembly.

Furthermore, the upper forming block 32 is provided with a first guiding hole 324, the lower forming block 31 is provided with a second guiding hole 315, and the first guiding hole 324 can correspondingly penetrate through the second guiding hole 315 during mold closing. The guide posts are correspondingly arranged on the upper die 10, so that the guide posts can be correspondingly inserted into the first guide holes 324 and the second guide holes 315 during die assembly, and the die assembly and die disassembly processes are stable.

Further, the top end of the upper forming block 32 is provided with a first knocking groove 325; the top end of the lower forming block 31 is provided with a second knocking groove 316. Because the mould is in the hot melt process of heating, the shaping product probably bonds as an organic whole with last shaping piece 32, lower shaping piece 31, so when the mould is opened, can beat and strike recess or through-hole through the instrument and make better and the product after the shaping of last shaping piece 32, lower shaping piece 31 separate, be convenient for the demolding.

Preferably, the molding assembly 30 is provided with at least two sets, and the at least two sets are circumferentially distributed around the central axis of the lower mold 20 at intervals, so that at least two products can be molded at one time, and the production efficiency is improved. Specifically, the number of the upper forming blocks 32 and the lower forming blocks 31 is two, three, four, five, six or more. Of course, the number of the molding assemblies 30 may also be two, four, five, six or more, and may be adjusted according to the needs of the user.

Example 2:

referring to fig. 7, the composite propeller manufactured by the manufacturing method in embodiment 1 includes a hub 41 and blades 42, and has the characteristics of light weight, simple structure, good stability and convenience in processing.

While only certain features and embodiments of the application have been illustrated and described, many modifications and changes may occur to those skilled in the art (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the scope and spirit of the invention in the claims.

Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention should not be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims

1. The manufacturing method of the integrated composite propeller is characterized by comprising the following steps of,

2. The method for manufacturing the integrated composite propeller as recited in claim 1, wherein in the propeller molding step, a hot press is used for curing a molding die, the die assembly pressure is 8MPa-12MPa, and the curing temperature of the prepreg sheet is 120 ℃ to 150 ℃.

3. The method for manufacturing the integrated composite propeller as claimed in claim 1, wherein the forming mold comprises an upper mold, a lower mold, a driving assembly and a forming assembly, and the driving assembly is used for driving the upper mold and the lower mold to be closed or opened; the molding assembly comprises a molding insert pin, at least two upper molding blocks and at least two lower molding blocks, the molding insert pin is arranged on the lower die, and the at least two lower molding blocks are arranged on the lower die and wound outside the molding insert pin; the at least two upper forming blocks are correspondingly arranged on the at least two lower forming blocks one by one and are wound outside the forming insert pin; the top end of the lower forming block is provided with a first spiral groove, the bottom end of the upper forming block is provided with a second spiral groove, and the second spiral groove and the first spiral groove are used for matching to form a first cavity matched with a blade structure of the propeller after die assembly; the inner side surfaces of the at least two upper forming blocks and the at least two lower forming blocks are used for enclosing a second cavity with the outer surface of the forming insert pin after die assembly; the first cavity and the second cavity are communicated with each other.

4. The method of claim 3 wherein the lower mold block has a detent at one end, the detent being located below the end of the first helical groove; the other end of the lower forming block is provided with a first positioning block, and the first positioning block is arranged at the end part of the first spiral groove far away from the positioning groove; the first positioning block of one lower molding block is used for being embedded in the positioning groove of the adjacent lower molding block in a sliding mode during mold closing.

5. The method for manufacturing the integrated composite propeller as recited in claim 3, wherein one end of the upper molding block is provided with a positioning step, and the other end of the upper molding block is formed as a second positioning block, wherein the second positioning block of one upper molding block is used for abutting against the positioning step when the molds are closed.

6. The method for manufacturing the integrated composite propeller as recited in claim 5, wherein a third spiral groove is formed on the positioning step, and the third spiral groove is used for being communicated with the first spiral groove when the mold is closed and is matched with the second spiral groove to form the first cavity.

7. The method for manufacturing the integrated composite propeller as recited in claim 3, wherein the inner side surface of the lower forming block is provided with a first spiral forming surface, the inner side surface of the upper forming block is provided with a second spiral forming surface, the first spiral forming surface and the second spiral forming surface are used for being spirally connected and forming surfaces when the die is closed, and the forming surfaces are used for forming the outer surface of the insert pin to be matched with the second cavity; the molding surface is gradually screwed inwards from bottom to top.

8. The method of claim 3 wherein the lower mold block has a molding step at the inner bottom end for abutting the outer surface of the molding insert during mold closing.

9. The method for manufacturing the integrated composite propeller as recited in claim 3, wherein a first knocking groove is formed at a top end of the upper forming block; and a second knocking groove is formed in the top end of the lower forming block.

10. A composite propeller manufactured according to the method of any one of claims 1 to 9.