CN114274552B - Forming die and processing method of composite material transmission shaft - Google Patents
Forming die and processing method of composite material transmission shaft Download PDFInfo
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- CN114274552B CN114274552B CN202111400569.3A CN202111400569A CN114274552B CN 114274552 B CN114274552 B CN 114274552B CN 202111400569 A CN202111400569 A CN 202111400569A CN 114274552 B CN114274552 B CN 114274552B
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Abstract
The invention provides a forming die of a composite material transmission shaft and a processing method thereof, comprising an upper die, a lower die, a positioning core die and an elastic core die, wherein the upper die and the lower die are mutually matched to form a transmission shaft cavity, two ends of the cavity are provided with first positioning cavities matched with the positioning core die, one end of each first positioning cavity far away from the cavity is provided with a second positioning cavity matched with the elastic core die, one end of each second positioning cavity far away from the first positioning cavity is provided with a first through hole, the parting surface of the lower die is provided with two sealing grooves, two ends of each sealing groove are respectively communicated with the two first through holes, sealing strips are arranged in the sealing grooves, the parting surface of the upper die is provided with a glue collecting groove, the glue collecting grooves are oppositely arranged at two sides of the cavity, and the glue collecting grooves are provided with vent holes. The invention adopts the technological methods of male die laying and winding and female die curing, effectively ensures the compact state between prepreg blank layers through male die winding, effectively ensures the requirements of the outline dimension, the outer diameter, the straightness and the like of the product through female die curing, has high coil laying and winding efficiency and reduces the manufacturing cost.
Description
Technical Field
The invention relates to the technical field of manufacturing of composite material transmission shafts, in particular to a forming die and a processing method of a composite material transmission shaft.
Background
The existing composite material transmission shaft structure is generally designed into a middle composite material carbon tube and two-end metal flange connection structure, and the connection modes mainly comprise the following three types: firstly, the metal flange and the carbon tube are mechanically connected through rivets, bolts and the like, secondly, the metal flange and the carbon tube are subjected to secondary bonding of a sleeving piece through adhesive films or paste adhesive and the like, and thirdly, the metal flange and the composite carbon tube are integrally formed. The metal flange and the composite carbon tube are integrally formed, so that the stability of connection of the shaft tube and the metal flange is better ensured. In the prior art, the forming die of the composite material transmission shaft has the problems of extrusion and internal damage to the composite material transmission shaft caused by shrinkage deformation generated in the process of curing and cooling the die.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the invention provides a forming die and a processing method of a composite material transmission shaft, in order to overcome the defect that the forming die of the composite material transmission shaft in the prior art causes extrusion and internal damage to the composite material transmission shaft due to shrinkage deformation generated in the process of curing and cooling the die.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a forming die of combined material transmission shaft, includes mould, lower mould, location mandrel and elastic mandrel, go up mould and lower mould mutually support and form with transmission shaft complex die cavity, the transmission shaft include the axis body and locate the metal joint at axis body both ends, the die cavity both ends be equipped with location mandrel complex first location chamber, be equipped with the connection structure who is connected with the metal joint on the location mandrel, the one end that the die cavity was kept away from to first location chamber is equipped with elastic mandrel complex second location chamber, elastic mandrel supports and locates the location mandrel tip, the one end that first location chamber was kept away from to second location chamber is equipped with the first through-hole with external intercommunication, be equipped with on the elastic mandrel with first through-hole complex second through-hole along the axial, go up mould or lower mould parting surface on be equipped with two seal grooves, the die cavity both sides are located relatively to seal groove both ends respectively with two first through-hole intercommunication, be equipped with the sealing strip in the seal groove, it gathers gluey groove to be equipped with two on the parting surface to gather gluey groove both sides relatively, gather gluey groove and locate between gluey groove and the exhaust hole, it is equipped with the exhaust hole to gather on the die cavity.
The metal connectors at the two ends of the transmission shaft are respectively connected with two positioning core dies, and the positioning core dies are matched with the first positioning cavity to determine the positions of the positioning core dies, so that the positions and angles of the preformed blank of the transmission shaft in the cavity are determined; the elastic core mould is matched with the upper mould and the lower mould to fix and position the position of the core mould in the mould cavity, and more importantly, shrinkage deformation generated in the process that the forming mould is cooled from the curing temperature to the room temperature can be counteracted by elastic deformation of the elastic core mould, so that extrusion and damage to the composite material transmission shaft caused by the shrinkage deformation of the mould are avoided (when the mould is cooled from the curing temperature to the room temperature, the mould is shortened by shrinking, and the composite material transmission shaft is not shrunk due to different materials); the end parts of the upper die and the lower die are provided with first through holes for transmitting temperature and pressure in the curing process of the composite material transmission shaft; the upper die or the lower die is provided with a sealing groove, and the sealing of the parting surfaces of the upper die and the lower die is realized by arranging a sealing strip in the sealing strip; the exhaust hole is connected with the quick connector to form an exhaust channel so as to be beneficial to exhausting gas and volatile micromolecules during curing of the composite material, and can be provided with a threaded hole so as to realize quick communication with a vacuum system and finally provide vacuum and pressure required by curing of a transmission shaft of the composite material; the traditional method is that a vacuum bag is manufactured on the outer side of a mould, and the vacuum bag is communicated with an inner bag on the inner side of a composite material shaft tube to form a primary-secondary bag, and the vacuum bag is realized by vacuumizing and pressurizing through an autoclave; the improved remarkable effect is as follows: the influence of low production efficiency, waste of auxiliary materials and possible bag bursting risks during pressurization on the product quality caused by additional outer bag manufacturing is reduced.
Further, in order to enable the alignment of the upper die and the lower die to be accurate, a plurality of hemispherical limiting grooves are correspondingly formed in the parting surfaces of the upper die and the lower die, and spherical limiting blocks are arranged in the limiting grooves.
The positioning is performed through the upper hemispherical surface and the lower hemispherical surface of the spherical limiting blocks instead of the traditional guide coarse positioning through the guide post and the guide sleeve, and then the accurate positioning is performed through the two diagonal positioners or the accurate positioning is performed through the positioning pin and the like. One of the remarkable effects of improvement is as follows: the hemispherical limit groove is processed and realized on a machine tool along with the molded surface of the die, and the positions of the guide post and the guide sleeve (or the locating pin) on the die are realized by a die fitter through secondary locating installation and repair. Obviously, the positioning precision of the spherical limiting block is higher than that of the guide post and the guide sleeve (or the positioning pin), and the die machining cost and period are reduced while the positioning precision of the die profile is improved without additional die fitter installation and repair. Two significant effects of improvement: when the die is used, the upper die and the lower die which are positioned by adopting the spherical limiting blocks are easier to split, and the problem that the upper die and the lower die are not coordinated to be clamped by the guide column due to the fact that the guide column and the guide sleeve are separated easily occurs in the design of the guide column and the guide sleeve.
Further, the elastic core mould is of a conical structure, and the size of the large end of the elastic core mould is larger than that of the positioning core mould close to the end part of the elastic core mould.
Further, the elastic core mould is formed by splicing a first part and a second part, the first part is matched with a second positioning cavity in the upper mould in a shape, the second part is matched with a second positioning cavity in the lower mould in a shape, a plurality of pin holes are correspondingly formed in the parting surfaces of the first part and the second part, and pin shafts are arranged in the pin holes.
Further, in order to separate the upper die and the lower die quickly during demolding, a plurality of demolding grooves are formed in the outer wall surface, close to the parting surface, of the upper die and/or the lower die.
Further, the length of the glue gathering groove is shorter than the whole length of the transmission shaft and longer than the length of the shaft body, and the depth is 1 mm-6 mm.
The invention also provides a processing method of the composite material transmission shaft, which comprises the following steps:
(a) Preparing an elastic core mold: preparing and cleaning an upper die and a lower die, pouring an elastic core die by using a second positioning cavity reserved by the upper die and the lower die as a die, curing and shaping, and repairing for later use;
(b) Preparing a pipe coiling mold: preparing a cylindrical bar or pipe, and winding a layer of film on the cylindrical bar or pipe according to a certain angle for standby;
(c) And (3) blanking: discharging the prepreg meeting the requirements according to the designed angle and size, and finishing for later use;
(d) Preparing a preformed blank: laying the prepreg layer by layer according to a designed laying angle, then carrying out cold suction compaction, and then tightly winding the prepreg sheet on a cylindrical rod or pipe;
(e) Trimming and demoulding: cutting edges at two ends of a preformed blank body, winding a layer of adhesive film on the positions where metal connectors are preinstalled at the two ends, taking out the coiled pipe die, and taking the preformed blank body out for later use;
(f) Assembling a metal joint: installing metal connectors at two ends of a preformed blank body which is wound, and ensuring that the relative positions and angles of the two metal connectors are matched and consistent with the die cavity of a forming die;
(g) And (3) die assembly: installing positioning core dies at the end parts of two metal joints to finish positioning, and installing an elastic core die in a second positioning cavity of the die to finish die assembly;
(h) Bag making and sealing: the tubular vacuum bag passes through the middle of the preformed blank, and two ends of the tubular vacuum bag are hermetically connected to the communication position of the first through hole and the sealing groove by using the sealing adhesive tape, so that the sealing of the die cavity is realized;
(i) Curing: and (3) extracting the vacuum of the die cavity by utilizing an exhaust hole on the die, then sending the die into an autoclave for curing, and demoulding and trimming after curing is finished to obtain the composite material transmission shaft.
Further, in step (b), a film is wound around the tube rolling die to facilitate the removal of the preformed blank from the tube rolling die, the film including, but not limited to, release film, vacuum bag, release liner, and the like, commonly used release materials.
Further, in the step (c), the prepreg comprises, but is not limited to, unidirectional prepreg and fabric prepreg, and the matrix type of the prepreg comprises, but is not limited to, one or more than two of unsaturated polyester resin, epoxy resin, vinyl resin, phenolic resin or bismaleic resin, wherein the ratio of the lay-up angle is: the proportion of (0-35 DEG) is 10-30%, the proportion of (35-60 DEG) is 20-40%, and the proportion of (60-90 DEG) is 15-35%.
Further, in the step (d), the prepreg sheet prepared in the step (c) is firstly laid layer by layer according to the designed laying angle, and the gap between each layer of laid layer and the previous layer is staggered by 5-50 mm, and the winding can be manual winding or related machine winding.
The beneficial effects of the invention are as follows:
(1) The invention adopts the technological method of male die laying and winding and female die curing, effectively ensures the compact state between prepreg blank layers through male die winding, effectively ensures the requirements of the outline dimension, the outer diameter, the straightness and the like of the product through female die curing, has high coil laying and winding efficiency and reduces the manufacturing cost;
(2) According to the invention, the material sheets are paved in advance according to the layering, and the material sheets are properly staggered layer by layer, so that the winding and paving efficiency is improved while the design of layering is effectively realized, and the automatic operation of the pipe coiling equipment is more suitable, so that the automatic pipe coiling equipment has the characteristics of high efficiency, compact winding and suitability for batch;
(3) The invention establishes a rapid exhaust channel by combining reasonable design of the mould and a bag making method, improves bag making efficiency and is beneficial to batch production;
(4) The elastic core mold and the positioning core mold positioning design of the invention solve the problems of extrusion and internal damage to the composite material transmission shaft caused by shrinkage deformation generated in the curing and cooling process of the mold due to the expansion coefficient difference of the metal mold and the composite material transmission shaft while realizing the accurate positioning of the composite material transmission shaft.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is an exploded view of a preferred embodiment of the present invention;
fig. 2 is a schematic view of the structure of the lower die;
FIG. 3 is a schematic structural view of a drive shaft;
fig. 4 is a schematic diagram of the assembly of the mold.
In the figure: 1. the upper die, 2, the lower die, 3, the positioning core die, 4, the transmission shaft, 4-1, the shaft body, 4-2, the metal joint, 5, the elastic core die, 5-1, the second through hole, 6, the sealing strip, 6-1, the sealing groove, 7, the limiting block, 7-1, the limiting groove, 8, the glue collecting groove, 8-1, the exhaust hole, 9, the demolding groove, 10, the cavity, 11, the first positioning cavity, 12, the second positioning cavity, 13 and the first through hole.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. The figure is a simplified schematic diagram illustrating the basic structure of the invention only by way of illustration, and therefore it shows only the constitution related to the invention.
As shown in fig. 1-4, the forming mold of the composite material transmission shaft of the invention comprises an upper mold 1, a lower mold 2, a positioning core mold 3 and an elastic core mold 5, wherein the upper mold 1 and the lower mold 2 are mutually matched to form a cavity 10 matched with the transmission shaft 4, the transmission shaft 4 comprises a shaft body 4-1 and metal joints 4-2 arranged at two ends of the shaft body 4-1, first positioning cavities 11 matched with the positioning core mold 3 are arranged at two ends of the cavity 10, a connecting structure connected with the metal joints 4-2 is arranged on the positioning core mold 3, a second positioning cavity 12 matched with the elastic core mold 5 is arranged at one end of the first positioning cavity 11 far away from the cavity 10, the elastic core mold 5 is propped against the end of the positioning core mold 3, a first through hole 13 communicated with the outside is arranged at one end of the second positioning cavity 12 far away from the first positioning cavity 11, the first through hole 13 is round or rectangular (but not limited to round or round), and the cross section area of the first through hole is 0.5 times to 2 times that of the composite material transmission shaft 4; the elastic core mold is characterized in that a second through hole 5-1 matched with the first through hole 13 is axially formed in the elastic core mold 5, two sealing grooves 6-1 are formed in the parting surface of the upper mold 1 or the parting surface of the lower mold 2, the sealing grooves 6-1 are oppositely formed in two sides of the cavity 10, two ends of each sealing groove 6-1 are respectively communicated with two first through holes 13, sealing strips 6 are arranged in the sealing grooves 6-1, two glue collecting grooves 8 are formed in the parting surface of the upper mold 1, the two glue collecting grooves 8 are oppositely formed in two sides of the cavity 10, the glue collecting grooves 8 are formed between the sealing grooves 6-1 and the cavity 10, vent holes 8-1 for exhausting are formed in the glue collecting grooves 8, and the vent holes 8-1 are arranged into threaded holes matched with the quick connectors.
A plurality of hemispherical limit grooves 7-1 are correspondingly formed in the parting surfaces of the upper die 1 and the lower die 2, spherical limit blocks 7 are arranged in the limit grooves 7-1, and the diameter range of the spheres is designed to be 4-20 mm.
The elastic core mould 5 is of a conical structure, and the size of the large end of the elastic core mould 5 is larger than that of the end part of the positioning core mould 3 close to the elastic core mould 5.
The elastic core mould 5 is formed by splicing a first part and a second part, the first part is matched with the second positioning cavity 12 in the upper mould 1 in a shape, the second part is matched with the second positioning cavity 12 in the lower mould 2 in a shape, a plurality of pin holes are correspondingly formed in the parting surface of the first part and the parting surface of the second part, and pin shafts are arranged in the pin holes.
And a plurality of demolding grooves 9 are formed in the outer wall surface, close to the parting surface, of the upper mold 1 and/or the lower mold 2. External force is applied through the demolding groove 9, so that the upper mold 1 and the lower mold 2 are pried apart, and quick separation is realized.
The length of the glue gathering groove 8 is shorter than the whole length of the transmission shaft 4 and longer than the length of the shaft body 4-1, and the depth is 1 mm-6 mm.
The processing steps are as follows:
(a) Preparing an elastic core mold 5: preparing and cleaning an upper die 1 and a lower die 2, pouring an elastic core die 5 by using a second positioning cavity 12 reserved in the upper die 1 and the lower die 2 as a die, curing and shaping, and repairing for later use; the elastic core mould 5 is formed by casting liquid silicon rubber, has better matching degree with a mould cavity and a metal core mould, has better positioning effect and ensures the dimensional accuracy of the composite material transmission shaft 4;
(b) Preparing a pipe coiling mold: preparing a cylindrical bar or pipe, and winding a layer of film on the cylindrical bar or pipe according to a certain angle for standby; winding a layer of film on a winding pipe die, so as to facilitate the preform blank to be pulled out of the winding pipe die, wherein the film comprises a separation film, a vacuum bag, a demolding cloth and other common release materials;
(c) And (3) blanking: discharging the prepreg meeting the requirements according to the designed angle and size, and finishing for later use; the prepreg comprises but is not limited to unidirectional prepreg and fabric prepreg, and the matrix type of the prepreg comprises but is not limited to one or more than two of unsaturated polyester resin, epoxy resin, vinyl resin, phenolic resin or bismaleimide resin, wherein the pavement angle is as follows: (0-35 DEG) accounts for 10-30%, (35-60 DEG) accounts for 20-40%, and (60-90 DEG) accounts for 15-35%;
(d) Preparing a preformed blank: laying the prepreg layer by layer according to a designed laying angle, then carrying out cold suction compaction, and then tightly winding the prepreg sheet on a cylindrical rod or pipe; firstly, paving the prepreg sheet prepared in the step (c) layer by layer according to a designed paving angle, wherein a gap between each layer of paving and the last layer is staggered by 5-50 mm, and winding can be manual winding or related machine winding;
(e) Trimming and demoulding: cutting edges at two ends of a preformed blank body, winding a layer of adhesive film on the positions where metal joints 4-2 are preinstalled at the two ends, taking out the coiled pipe die, and taking the preformed blank body out for later use;
(f) Assembling the metal joint 4-2: the metal connectors 4-2 are arranged at two ends of the preformed blank body which is wound, so that the relative positions and angles of the two metal connectors 4-2 are matched and consistent with the die cavity of the forming die;
(g) And (3) die assembly: installing positioning core dies 3 at the end parts of two metal joints 4-2, placing the positioning core dies into a die to finish positioning, and assembling an elastic core die 5 into a second positioning cavity 12 of the die to finish die closing;
(h) Bag making and sealing: the tubular vacuum bag passes through the middle of the preformed blank, and two ends of the tubular vacuum bag are hermetically connected to the communication part of the first through hole 13 and the sealing groove 6-1 by using sealing rubber strips, so that the sealing of a die cavity is realized; the bag making method is to connect the tubular vacuum bag with the sealing groove 6-1 at the first through hole 13 by using a sealing adhesive tape to form a closed die cavity, but the method is not limited to the method, and a primary-secondary bag method can also be used, and the tubular vacuum bag is connected with the outer bag of the wrapping die by using the sealing adhesive tape to realize a transmission channel of pressure and temperature required by solidification;
(i) Curing: and (3) extracting the vacuum of the die cavity by using the vent hole 8-1 on the die, then sending the die into an autoclave for curing, and demoulding and trimming after curing is finished to obtain the composite material transmission shaft 4.
Directions and references (e.g., up, down, left, right, etc.) in this invention may be used only to aid in the description of features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (9)
1. A processing method of a composite material transmission shaft is characterized in that: the processing method is realized by using a forming die of a composite material transmission shaft, the forming die of the composite material transmission shaft comprises an upper die (1), a lower die (2), a positioning core die (3) and an elastic core die (5), the upper die (1) and the lower die (2) are mutually matched to form a cavity (10) matched with the transmission shaft (4), the transmission shaft (4) comprises a shaft body (4-1) and metal joints (4-2) arranged at two ends of the shaft body (4-1), two ends of the cavity (10) are provided with first positioning cavities (11) matched with the positioning core die (3), a connecting structure connected with the metal joints (4-2) is arranged on the positioning core die (3), one end of the first positioning cavity (11) away from the cavity (10) is provided with a second positioning cavity (12) matched with the elastic core die (5), the end of the elastic core die (5) is propped against the end of the positioning core die (3), one end of the second positioning cavity (12) away from the first positioning cavity (11) is provided with a first through hole (13) communicated with the outside, the elastic core die (5) is provided with a first through hole (13) matched with the first through hole (1) or the second through hole (1) is arranged on the first die (1), the sealing grooves (6-1) are oppositely arranged on two sides of the cavity (10), two ends of the sealing grooves (6-1) are respectively communicated with the two first through holes (13), sealing strips (6) are arranged in the sealing grooves (6-1), two glue collecting grooves (8) are arranged on the parting surface of the upper die (1), the two glue collecting grooves (8) are oppositely arranged on two sides of the cavity (10), the glue collecting grooves (8) are arranged between the sealing grooves (6-1) and the cavity (10), and exhaust holes (8-1) for exhausting are formed in the glue collecting grooves (8);
the processing method of the composite material transmission shaft comprises the following steps:
(a) Preparing an elastic core mould (5): preparing and cleaning an upper die (1) and a lower die (2), pouring an elastic core die (5) by using a second positioning cavity (12) reserved by the upper die (1) and the lower die (2) as a die, curing and shaping, and repairing for later use;
(b) Preparing a pipe coiling mold: preparing a cylindrical bar or pipe, and winding a layer of film on the cylindrical bar or pipe according to a certain angle for standby;
(c) And (3) blanking: discharging the prepreg meeting the requirements according to the designed angle and size, and finishing for later use;
(d) Preparing a preformed blank: laying the prepreg layer by layer according to a designed laying angle, then carrying out cold suction compaction, and then tightly winding the prepreg sheet on a cylindrical rod or pipe;
(e) Trimming and demoulding: cutting edges at two ends of a preformed blank body, winding a layer of adhesive film on the positions where metal joints (4-2) are preinstalled at the two ends, taking out a coiled pipe die, and taking the preformed blank body out for later use;
(f) Assembling the metal joint (4-2): installing the metal connectors (4-2) at two ends of the preformed blank body which is wound completely, and ensuring that the relative positions and angles of the two metal connectors (4-2) are matched and consistent with the die cavity of the forming die;
(g) And (3) die assembly: installing positioning core dies (3) at the end parts of two metal joints (4-2) to the preformed blank body assembled by the metal joints (4-2), putting the preformed blank body into a die to finish positioning, and assembling an elastic core die (5) into a second positioning cavity (12) of the die to finish die assembly;
(h) Bag making and sealing: the tubular vacuum bag passes through the middle of the preformed blank, and two ends of the tubular vacuum bag are hermetically connected at the communication position of the first through hole (13) and the sealing groove (6-1) by using the sealing adhesive tape, so that the sealing of a die cavity is realized;
(i) Curing: and (3) extracting the vacuum of the die cavity by using an upper vent hole (8-1) of the die, then sending the die into an autoclave for curing, and demoulding and trimming after curing is finished to obtain the composite material transmission shaft (4).
2. A method of manufacturing a composite propeller shaft as set forth in claim 1, wherein:
in step (b), a film is wound on the tube rolling die to facilitate the preform to be pulled out of the tube rolling die, wherein the film comprises a release film, a vacuum bag, a release cloth and other common release materials.
3. A method of manufacturing a composite propeller shaft as set forth in claim 1, wherein:
in the step (c), the prepreg comprises, but is not limited to, unidirectional prepreg and fabric prepreg, and the matrix type of the prepreg comprises, but is not limited to, one or more than two of unsaturated polyester resin, epoxy resin, vinyl resin, phenolic resin or bismaleic resin, wherein the layering angle is as follows: (0-35 DEG) accounting for 10-30%,
the proportion of (35-60 DEG) is 20-40%, and the proportion of (60-90 DEG) is 15-35%.
4. A method of manufacturing a composite propeller shaft as set forth in claim 1, wherein:
in the step (d), the prepreg sheet prepared in the step (c) is firstly laid layer by layer according to the designed laying angle, and the gap between each laid layer and the previous layer is staggered by 5-50 mm, and the winding is manual winding or related machine winding.
5. A method of manufacturing a composite propeller shaft as set forth in claim 1, wherein: a plurality of hemispherical limit grooves (7-1) are correspondingly formed in the parting surfaces of the upper die (1) and the lower die (2), and spherical limit blocks (7) are arranged in the limit grooves (7-1).
6. A method of manufacturing a composite propeller shaft as set forth in claim 1, wherein: the elastic core mould (5) is of a conical structure, and the large end size of the elastic core mould (5) is larger than the size of the positioning core mould (3) close to the end part of the elastic core mould (5).
7. The method for processing the composite transmission shaft according to claim 6, wherein: the elastic core mold (5) is formed by splicing a first part and a second part, the first part is matched with a second positioning cavity (12) in the upper mold (1) in a shape, the second part is matched with the second positioning cavity (12) in the lower mold (2) in a shape, a plurality of pin holes are correspondingly formed in the parting surfaces of the first part and the second part, and pin shafts are arranged in the pin holes.
8. A method of manufacturing a composite propeller shaft as set forth in claim 1, wherein: and a plurality of demolding grooves (9) are formed in the outer wall surface, close to the parting surface, of the upper mold (1) and/or the lower mold (2).
9. A method of manufacturing a composite propeller shaft as set forth in claim 1, wherein: the length of the glue gathering groove (8) is shorter than the whole length of the transmission shaft (4), longer than the length of the shaft body (4-1), and the depth is 1 mm-6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107139504A (en) * | 2017-04-01 | 2017-09-08 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Composite hat stringer is preforming and its core and method of Material Stiffened Panel solidification |
| CN109466088A (en) * | 2018-12-06 | 2019-03-15 | 内蒙古航天红岗机械有限公司 | A kind of mold and compression-moulding methods of Fabric prereg composite cylinder |
| CN109895418A (en) * | 2019-03-27 | 2019-06-18 | 成都联科航空技术有限公司 | A kind of processing method of abnormity hollow structure composite material parts molding core model |
| CN111823614A (en) * | 2020-07-14 | 2020-10-27 | 中车青岛四方机车车辆股份有限公司 | Forming method of composite material multi-cavity structure |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107139504A (en) * | 2017-04-01 | 2017-09-08 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Composite hat stringer is preforming and its core and method of Material Stiffened Panel solidification |
| CN109466088A (en) * | 2018-12-06 | 2019-03-15 | 内蒙古航天红岗机械有限公司 | A kind of mold and compression-moulding methods of Fabric prereg composite cylinder |
| CN109895418A (en) * | 2019-03-27 | 2019-06-18 | 成都联科航空技术有限公司 | A kind of processing method of abnormity hollow structure composite material parts molding core model |
| CN111823614A (en) * | 2020-07-14 | 2020-10-27 | 中车青岛四方机车车辆股份有限公司 | Forming method of composite material multi-cavity structure |
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