CN113043527B - Manufacturing method of lightweight composite thrust rod - Google Patents
Manufacturing method of lightweight composite thrust rod Download PDFInfo
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- CN113043527B CN113043527B CN202110176555.1A CN202110176555A CN113043527B CN 113043527 B CN113043527 B CN 113043527B CN 202110176555 A CN202110176555 A CN 202110176555A CN 113043527 B CN113043527 B CN 113043527B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
- B29C65/64—Joining a non-plastics element to a plastics element, e.g. by force
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/1418—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure
- B29C2045/14237—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity
- B29C2045/14245—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being deformed or preformed, e.g. by the injection pressure the inserts being deformed or preformed outside the mould or mould cavity using deforming or preforming means outside the mould cavity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/10—Constructional features of arms
- B60G2206/11—Constructional features of arms the arm being a radius or track or torque or steering rod or stabiliser end link
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/70—Materials used in suspensions
- B60G2206/71—Light weight materials
- B60G2206/7104—Thermoplastics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/80—Manufacturing procedures
- B60G2206/81—Shaping
- B60G2206/8101—Shaping by casting
- B60G2206/81012—Shaping by casting by injection moulding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
A method for manufacturing a lightweight composite thrust rod includes the steps of firstly arranging a tool comprising a central body and a pressing block, then winding a strip-shaped continuous fiber reinforced thermoplastic composite material for multiple circles along the periphery of the central body, pressing a continuous special-shaped peripheral layer reinforcing piece which is closed in the circumferential direction by the pressing block, then filling long fiber reinforced thermoplastic composite material or short fiber reinforced thermoplastic composite material into the peripheral layer reinforcing piece in an injection molding mode, and finally pressing rubber metal spherical hinges into two ends to form the complete thrust rod. The thrust rod formed by the method is excellent in performance and higher in strength, can bear higher tensile strength and is not easy to tear, meanwhile, the U-shaped edge wrapping structure is arranged at the edge of the reinforcing piece of the peripheral layer, the welding strength of two different materials is guaranteed, and the overall fatigue performance of the thrust rod is also more excellent.
Description
Technical Field
The invention relates to a method for manufacturing a thrust rod, in particular to a method for manufacturing a lightweight composite material thrust rod.
Background
The thrust rod is an auxiliary element widely used in automobile suspension systems, and comprises a rod body, wherein the two ends of the rod body are provided with rod heads, and the rod heads are provided with supporting shafts connected with double bridges of an automobile so as to transmit longitudinal force or transverse force of the automobile and simultaneously transmit force and moment in other directions, thereby ensuring a definite motion relationship between wheels and an automobile body, enabling the automobile to have good motion characteristics, preventing the automobile body from generating too large transverse tilting during turning and improving the balance of the automobile.
Currently, in order to reduce fuel consumption and exhaust pollution of automobiles, weight reduction of automobiles is strongly promoted, and therefore, lightweight thrust rods have also appeared. The invention discloses a thrust rod light-weight method and a light-weight thrust rod, as application number CN201510739066.7, wherein mandrels of a rod body and an elastic spherical hinge are all made of high polymer materials and are molded at one step by using an injection mold, two opposite side surfaces of the rod body are both provided with side surfaces with intermittent grooves I, each intermittent groove I comprises a plurality of sub grooves I which are sequentially distributed along the length direction of the rod body, and a plurality of convex ribs are arranged on the bottom surface of each sub groove I, so that each sub groove I is divided into a plurality of small grooves by the plurality of convex ribs. The invention can reduce the weight of the thrust rod as much as possible on the premise of meeting the use requirement of the thrust rod, thereby achieving the requirement of light weight of the thrust rod.
Another patent with application No. CN201510735238.3 entitled "use of fiber reinforced thermoplastic composites for molding automotive parts" mentions the use of long fiber reinforced thermoplastic composites and continuous fiber reinforced thermoplastic composites to make lightweight automotive parts.
None of the above patents mentioned a method of manufacturing a thrust rod with a reduced weight by forming an outer circumferential layer reinforcement in advance, and therefore, the applicant proposed another method of manufacturing a thrust rod with more excellent performance.
Disclosure of Invention
The invention provides a manufacturing method of a lightweight composite material thrust rod aiming at the problem that the performance of the current lightweight thrust rod needs to be improved.
The invention adopts the following means to solve the problems: a method for manufacturing a lightweight composite thrust rod comprises the steps of winding a continuous peripheral layer reinforcing piece which is closed in the circumferential direction by utilizing a strip-shaped continuous fiber reinforced thermoplastic composite material, filling a long fiber reinforced thermoplastic composite material or a short fiber reinforced thermoplastic composite material into the peripheral layer reinforcing piece in an injection molding mode, and finally, pressing rubber metal spherical hinges at two ends to form the complete thrust rod.
Further, when winding the periphery layer reinforcement, set up a frock including central body and briquetting, with banded continuous fibers reinforcing thermoplasticity combined material along central body periphery winding many rings after, utilize the briquetting extrusion winding continuous fibers reinforcing thermoplasticity combined material, through the briquetting with the central body together to the continuous fibers reinforcing thermoplasticity combined material after the winding suppress, make the continuous fibers reinforcing thermoplasticity combined material after the winding the same with the periphery shape and the size of distance rod, form the periphery layer reinforcement.
Further, the central body is a mold core part of a molding structure for limiting the long fiber reinforced thermoplastic composite material or the short fiber reinforced thermoplastic composite material in the injection molding process, and during injection molding, the central body and the peripheral layer reinforcement are placed into a mold together for injection molding.
Further, the metal steel sleeve between the outer peripheral layer reinforcing member and the rubber metal spherical hinge is designed into two ends of the central body, and the banded continuous fiber reinforced thermoplastic composite material is directly contacted with the outer side of the metal steel sleeve during winding.
Furthermore, a groove is formed in the periphery of the metal steel sleeve, and during injection molding, the long fiber reinforced thermoplastic composite material or the short fiber reinforced thermoplastic composite material flows into the space between the metal steel sleeve and the peripheral layer reinforcing part along the groove to be combined into a whole.
Furthermore, a metal steel sleeve is arranged between the peripheral layer reinforcing piece and the rubber metal spherical hinge, and the distance between the peripheral layer reinforcing piece and the metal steel sleeve is controlled, so that the thickness of the long fiber reinforced thermoplastic composite material or the short fiber reinforced thermoplastic composite material injected between the peripheral layer reinforcing piece and the metal steel sleeve is 0-5 mm.
Further, during injection molding, the edge of the peripheral layer reinforcing part, which is in contact with the long fiber reinforced thermoplastic composite material or the short fiber reinforced thermoplastic composite material, is wrapped in a cavity of the mold core surrounding the city, so that the rubber material extends outwards to form a bound edge structure at the edge.
Further, the long fiber reinforced thermoplastic composite material or short fiber reinforced thermoplastic composite material injected into the outer peripheral layer reinforcement is designed into a lattice structure to reduce the overall quality.
Further, the rib direction of the lattice structure is designed to be the same as the load transfer path direction to improve the overall strength.
Further, the method further comprises the step of heating the outer periphery layer reinforcement before injecting the long fiber-reinforced thermoplastic composite material or the short fiber-reinforced thermoplastic composite material into the outer periphery layer reinforcement.
The invention has the beneficial effects that:
1. according to the invention, the continuous peripheral layer reinforcing part which is sealed in the circumferential direction is wound by the strip-shaped continuous fiber reinforced thermoplastic composite material to serve as a surrounding structural part of the whole thrust rod, and then the long fiber reinforced thermoplastic composite material or the short fiber reinforced thermoplastic composite material is filled into the peripheral layer reinforcing part in an injection molding mode.
2. According to the invention, the outer peripheral layer reinforcing piece is arranged at the outermost periphery of the thrust rod, so that the strength of the thrust rod can be ensured by the outer peripheral layer reinforcing piece, a light grid structure can be conveniently realized inside the thrust rod, and the grid structure is not required to be designed to provide support for tension and load borne by the thrust rod.
3. According to the invention, the thickness of the plastic between the peripheral layer reinforcing part and the metal steel sleeve is controlled to be 0-5mm, so that the defect of an injection molding process caused by the overlarge thickness of the plastic at the position is avoided, and the integral fatigue performance of the thrust rod can be improved.
4. According to the thrust rod, the edge-covering structure is designed at the edge part of the long fiber reinforced thermoplastic composite material or the short fiber reinforced thermoplastic composite material, which is in contact with the peripheral layer reinforcing piece, so that a U-shaped coating is formed, and the contact surface between the two materials is increased, so that the strength of a welding interface of the two different materials is further improved, the welding interface is not easy to peel, and the overall performance of the thrust rod is improved.
5. According to the invention, the rib direction of the grid structure in the peripheral layer reinforcing part is designed to be the same as the direction of the transmission path of the load born by the thrust rod, so that the compression strength and the shear strength of the thrust rod are improved.
Drawings
FIG. 1 is a schematic view of a thrust rod according to an embodiment;
FIG. 2 is a schematic view of a reinforcement of an outer peripheral layer according to an embodiment;
FIG. 3 is a schematic view of a steel sleeve according to an embodiment;
FIG. 4 is a schematic diagram of a rubber-metal spherical hinge according to an embodiment;
FIG. 5 is a schematic view of a tooling structure according to an embodiment;
FIG. 6 is a schematic view of FIG. 5 with the center body removed;
FIG. 7 is a schematic view of a central body according to an embodiment;
FIG. 8 is a schematic structural view of a second metal steel sleeve according to an embodiment;
FIG. 9 is a graph of the tensile strength of the thrust rod of the first embodiment versus a conventional thrust rod;
in the figure: 1. the device comprises a thrust rod, 11 parts of a peripheral layer reinforcing part, 12 parts of a metal steel sleeve, 121 parts of a groove, 13 parts of a rubber metal spherical hinge, 131 parts of an outer sleeve, 132 parts of a rubber vulcanized body, 133 parts of a mandrel, 14 parts of a grid structure, 2 parts of a tool, 21 parts of a fixing plate, 22 parts of a central body, 23 parts of a pressing block, 24 parts of an air cylinder, 25 parts of a positioning groove and 26 parts of a positioning plate.
Detailed Description
The invention is further described below with reference to the accompanying drawings. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example one
A method for manufacturing a light composite thrust rod comprises the steps that as shown in figure 1, the thrust rod comprises an outermost peripheral layer reinforcing part 11 and long fiber reinforced thermoplastic composite materials or short fiber reinforced thermoplastic composite materials injected into the outer peripheral layer reinforcing part 11, metal steel sleeves 12 are arranged at two ends in the outer peripheral layer reinforcing part 11, and rubber metal ball hinges 13 are pressed in the metal steel sleeves 12.
As shown in fig. 2, the outer peripheral layer reinforcement 11 is a continuous enclosing structure formed by winding a strip-shaped continuous fiber reinforced thermoplastic composite material and sealed in the circumferential direction, and provides an integral support for the whole thrust rod 1, and because the whole outer peripheral layer reinforcement 11 is a whole formed by winding a continuous and complete material strip, when the outer peripheral structure serving as the thrust rod wraps the inside of the outer peripheral layer reinforcement, the tensile strength of the formed thrust rod 1 is greatly improved, and the requirements of light weight and high strength are met.
As shown in fig. 3, the metal steel sleeve 12 is a circular cylinder. As shown in fig. 4, the rubber metal spherical hinge 13 includes an outer sleeve 131, a rubber vulcanized body 132 and a core shaft 133 from outside to inside, and the rubber vulcanized body 132 vulcanizes and connects the outer sleeve 131 and the core shaft 133 into a whole and then presses the whole into the metal steel sleeve 12.
Before the thrust rod 1 is manufactured, the outer peripheral layer reinforcing member 11 needs to be manufactured through the tool 2. As shown in fig. 5, the fixture 2 includes a fixing plate 21, a central body 22 disposed on the fixing plate 21, a pressing block 23, and an air cylinder 24, wherein a positioning slot 25 is disposed on an upper surface of the fixing plate 21, a positioning plate 26 is disposed on a lower surface of the central body 22, the positioning plate 26 is matched with the positioning slot 25 in size, the positioning plate 26 and the positioning slot 25 are in clearance fit, the central body 22 can be separated from the fixing plate 21, and the central body 22 can be positioned on the fixing plate 21 after the positioning plate 26 is embedded into the positioning slot 25. The four pressing blocks 23 are respectively arranged at two sides and two ends of the positioning groove 25, and each pressing block 23 is provided with an air cylinder 24 for pushing the pressing block to move close to or far away from the central body 22. When the strip-shaped continuous fiber reinforced thermoplastic composite material is wound around the periphery of the central body 22 and the air cylinder 24 pushes the pressing blocks 23 to be close to the central body 22 to extrude the wound continuous fiber reinforced thermoplastic composite material, the shape of the periphery of the central body 22 is the same as that of the periphery of the thrust rod 1, and the shape formed by combining the surfaces of the four pressing blocks 23 close to the central body 22 is also the same as that of the periphery of the thrust rod 1. In this embodiment, the central body 22 is a metal member manufactured according to the outer peripheral shape of the thrust rod 1, and thus the thrust rod 1 is specifically manufactured by:
the first step is as follows: after winding the belt-shaped continuous fiber reinforced thermoplastic composite material on the outer periphery of the central body 22 for a plurality of circles, heating the wound continuous fiber reinforced thermoplastic composite material, pushing the pressing block 23 to extrude towards the central body 22 by using the air cylinder 24 to shape the continuous fiber reinforced thermoplastic composite material, cooling, loosening the air cylinder 24 to separate the pressing block 23 from the central body 22, and taking down the continuous fiber reinforced thermoplastic composite material from the central body 22 to form the outer periphery layer reinforcing part 11.
The second step is that: and (2) heating the outer peripheral layer reinforcing part 11 again, then placing the outer peripheral layer reinforcing part into an injection mold, placing a metal steel sleeve 12 at each of two ends of the inner part of the outer peripheral layer reinforcing part, then injecting a long fiber reinforced thermoplastic composite material or a short fiber reinforced thermoplastic composite material into a space between the outer peripheral layer reinforcing part 11 and the metal steel sleeve 12, demolding, and then pressing a rubber metal spherical hinge 13 into the two metal steel sleeves 12, thus completing the manufacture of the thrust rod 1.
As shown in fig. 9, the thrust rod 1 manufactured in the present embodiment is compared with the tensile strength curve of the thrust rod manufactured by the applicant currently in a conventional manner, where line a is a graph of the thrust rod in the present embodiment, and line b is a graph of the conventional thrust rod, and it can be seen from the graph that the thrust rod of the present embodiment can bear a larger limit load, has a stronger structural strength under the same conditions, and thus has a wider trial vehicle model.
The first step may be modified to: a heating device such as an infrared heating device is arranged near the tool 2, the strip-shaped continuous fiber reinforced thermoplastic composite material is heated and wound on the outer side of the central body 22 for a plurality of times, the pressing block 23 is pushed by the air cylinder 24 to extrude towards the central body 22, so that the continuous fiber reinforced thermoplastic composite material is shaped, then the air cylinder 24 is cooled, and the continuous fiber reinforced thermoplastic composite material is taken down from the central body 22 to form the outer peripheral layer reinforcing part 11. The mode of heating while winding can save the time of independent heating before pressing, and improve the production efficiency. Or the wound continuous fiber reinforced thermoplastic composite material may be cold pressed and then the entire tool 2 may be heated together with the material. In addition, the continuous fiber reinforced thermoplastic composite material in a tape form is a commercially available product, and the width thereof is not necessarily exactly equal to the width of the outer periphery of the thrust rod 1, and therefore, before winding, the continuous fiber reinforced thermoplastic composite material needs to be cut in width while maintaining the original length in length, so that the outer periphery layer reinforcement member 11 is formed by forming a complete continuous fiber reinforced thermoplastic composite material tape, and the tensile strength thereof is improved.
In the second step, when the steel metal sleeve 12 is placed on the outer-periphery-layer reinforcing member 11, the clearance between the steel metal sleeve 12 and the outer-periphery-layer reinforcing member 11 is controlled to be within 0 to 5 mm. Because the thicker the glue layer is during injection molding, the more defects caused by the injection molding process are, the performance of the product is reduced, and therefore, the distance between the metal steel sleeve 12 and the peripheral layer reinforcement 11 is controlled, the glue injection amount is reduced, the defects of the connecting part are reduced or eliminated, and the performance of the thrust rod 1 is improved. Meanwhile, during injection molding, the edge of the peripheral layer reinforcing part 11, which is in contact with the long fiber reinforced thermoplastic composite material or the short fiber reinforced thermoplastic composite material, is wrapped in a cavity of the mold core surrounding city, so that the rubber material extends outwards in the injection molding process to form a bound edge structure at the joint edge. Although the peripheral layer reinforcement 11 is the same as the injection molding material matrix, the two are formed by different forming methods, and the bonding performance of the two is poorer than that of the same forming process, so that the bonding part is easy to delaminate and peel off in the subsequent long-term loading process, the edge covering structure forms a U-shaped coating, the contact surface between the two materials is increased, the interface fusion strength of different materials is increased, the structure can bear larger load, and therefore the structure is not easy to peel off, the performance of the thrust rod 1 is improved, and meanwhile, the injection molding is easy to realize full-automatic production. In addition, the structure of the long fiber reinforced thermoplastic composite material or the short fiber reinforced thermoplastic composite material molded after injection is the grid structure 14, the quality of the thrust rod 1 is further reduced, the direction of ribs forming the grid structure 14 is the same as the direction of a load transfer path borne by the thrust rod 1, and the thrust rod 1 mainly bears three loads in the using process: the tensile, compression, torsion, tensile and compressive loads are transmitted along the length direction of the product, and the continuous fiber reinforced thermoplastic composite material is placed in the length direction and arranged at the periphery, so that the tensile and compressive loads can be borne; for the torsional load, the middle grid structure 14 is mainly used for resisting, when a product is twisted, the tensile strength of the composite material which is a material with poor plasticity is lower than the compressive strength and the shear strength, the deformation is always smaller in the twisting process, and finally the composite material is pulled apart on the inclined plane which forms an inclined angle of 45 degrees with the central connecting line of the two metal steel sleeves 12, so that the rib direction can be arranged at an inclined angle of 45 degrees with the central connecting line under the condition that the process of the grid structure 14 allows, namely the rib direction is the same as the load transmission direction, so that the torsional strength of the thrust rod 1 is improved.
Example two
The present embodiment differs from the above embodiments in that: in this embodiment, the central body 22 is a mold core portion that limits a molding structure of a long fiber reinforced thermoplastic composite material or a short fiber reinforced thermoplastic composite material during an injection molding process, and the metal steel sleeves 12 are used as two end portions of the central body 22, so that the thrust rod 1 is specifically manufactured in the following manner:
the first step is as follows: a heating device such as an infrared heating device is arranged near the tool 2, the strip-shaped continuous fiber reinforced thermoplastic composite material is wound for a plurality of circles around the outer side of a central body 22 formed by the metal steel sleeve 12 and the die core while being heated, the pressing block 23 is pushed by the air cylinder 24 to extrude towards the central body 22 to shape the continuous fiber reinforced thermoplastic composite material, the air cylinder 24 is loosened to separate the pressing block 23 from the central body 22, and the manufacturing of the peripheral layer reinforcing part 11 is completed.
The second step is that: putting the peripheral layer reinforcement 11 and the central body 22 into an injection mold, injecting a long fiber reinforced thermoplastic composite material or a short fiber reinforced thermoplastic composite material into a space between the peripheral layer reinforcement 11 and the metal steel sleeves 12, and pressing the rubber metal spherical hinge 13 into the two metal steel sleeves 12 after demolding to complete the manufacture of the thrust rod 1.
Compared with the first embodiment, the outer periphery layer reinforcing part 11 does not need to be taken out of the central body 22 before injection molding, so that reheating after cooling is not needed, the time is saved, the production speed is improved, and the method is suitable for batch production. And as shown in fig. 8, in the embodiment, the groove 121 is formed on the outer periphery of the metal steel sleeve 12, and during the injection molding process, the glue can flow into between the metal steel sleeve 12 and the outer periphery layer reinforcing member 11 along the groove 121, so that the two are combined together to form a whole.
Of course, the first step of this embodiment may also be changed to: winding a plurality of turns of the strip-shaped continuous fiber reinforced thermoplastic composite material on the outer side of a central body 22 formed by the metal steel sleeve 12 and the die core, heating the wound continuous fiber reinforced thermoplastic composite material, pushing a pressing block 23 to extrude towards the central body 22 by using an air cylinder 24 to shape the continuous fiber reinforced thermoplastic composite material, loosening the air cylinder 24 to separate the pressing block 23 from the central body 22, and finishing the manufacture of the peripheral layer reinforcing part 11. Or the wound continuous fiber reinforced thermoplastic composite material may be cold pressed and then the entire tool 2 may be heated together with the material.
The above embodiments are provided for illustrative purposes only and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should fall within the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (2)
1. A manufacturing method of a lightweight composite thrust rod is characterized by comprising the following steps: winding a continuous special-shaped peripheral layer reinforcing part (11) which is closed in the circumferential direction by using a strip-shaped continuous fiber reinforced thermoplastic composite material to serve as a surrounding structural part of the whole thrust rod, filling a long fiber reinforced thermoplastic composite material or a short fiber reinforced thermoplastic composite material into the peripheral layer reinforcing part (11) in an injection molding mode, and finally pressing a rubber metal spherical hinge (13) into two ends to form the complete thrust rod;
when the peripheral layer reinforcing piece (11) is wound, a tool comprising a central body (22) and a pressing block (23) is arranged, after the strip-shaped continuous fiber reinforced thermoplastic composite material is wound for a plurality of circles along the periphery of the central body (22), the pressing block (23) is used for extruding the wound continuous fiber reinforced thermoplastic composite material, the wound continuous fiber reinforced thermoplastic composite material is pressed together with the central body (22) through the pressing block (23), the wound continuous fiber reinforced thermoplastic composite material is enabled to be identical to the thrust rod (1) in peripheral shape and size, and the special-shaped peripheral layer reinforcing piece (11) is formed;
the fixture (2) comprises a fixing plate (21), a central body (22) arranged on the fixing plate (21), a pressing block (23) and an air cylinder (24), wherein a positioning groove (25) is formed in the upper surface of the fixing plate (21), a positioning plate (26) is arranged on the lower surface of the central body (22), the positioning plate (26) is matched with the positioning groove (25) in size, the central body (22) and the fixing plate (21) are in clearance fit, the central body (22) can be separated from the fixing plate (21), and the central body (22) can be positioned on the fixing plate (21) after the positioning plate (26) is embedded into the positioning groove (25); the four pressing blocks (23) are respectively arranged at two sides and two ends of the positioning groove (25), and each pressing block (23) is provided with an air cylinder (24) to push the pressing block to move close to or far away from the central body (22); when the strip-shaped continuous fiber reinforced thermoplastic composite material is wound on the periphery of the central body (22), and the air cylinder (24) pushes the pressing blocks (23) to be close to the central body (22) to extrude the wound continuous fiber reinforced thermoplastic composite material, the shape of the periphery of the central body (22) is the same as that of the periphery of the thrust rod (1), and the shape formed by combining the surfaces of the four pressing blocks (23) close to the central body (22) is also the same as that of the periphery of the thrust rod (1);
before winding, cutting the continuous fiber reinforced thermoplastic composite material in width to enable the width of the continuous fiber reinforced thermoplastic composite material to be equal to the width of the periphery of the thrust rod (1);
during injection molding, the edge of the peripheral layer reinforcement (11) contacting with the long fiber reinforced thermoplastic composite material or the short fiber reinforced thermoplastic composite material is wrapped in a cavity surrounded by a mold core, so that the rubber material extends outwards to form a bound edge structure at the edge;
designing the long fiber reinforced thermoplastic composite material or short fiber reinforced thermoplastic composite material injected into the outer peripheral layer reinforcement (11) into a grid structure to reduce the overall quality; the rib direction of the grid structure is designed into a structure with the same direction as the load transfer path so as to improve the overall strength;
the thrust rod (1) is specifically manufactured in the following manner:
the first step is as follows: winding a belt-shaped continuous fiber reinforced thermoplastic composite material on the outer side circumference of a central body (22) for a plurality of circles, heating the wound continuous fiber reinforced thermoplastic composite material, pushing a pressing block (23) to extrude towards the central body (22) to shape the continuous fiber reinforced thermoplastic composite material, cooling, separating the pressing block (23) from the central body (22), and taking the continuous fiber reinforced thermoplastic composite material off from the central body (22) to form an outer circumference layer reinforcing part (11); or the wound continuous fiber reinforced thermoplastic composite material is cold-pressed, and then the whole tool (2) and the wound continuous fiber reinforced thermoplastic composite material are heated together;
the second step is that: the outer peripheral layer reinforcing piece (11) is heated again and then placed into an injection mold, two metal steel sleeves (12) are placed at two ends of the inner part of the outer peripheral layer reinforcing piece respectively, then long fiber reinforced thermoplastic composite materials or short fiber reinforced thermoplastic composite materials are injected into a space between the outer peripheral layer reinforcing piece (11) and the metal steel sleeves (12), and a rubber metal spherical hinge (13) is pressed into the two metal steel sleeves (12) after demolding, so that the thrust rod (1) is manufactured;
or:
the first step is as follows: arranging a heating device near the tool (2), heating the strip-shaped continuous fiber reinforced thermoplastic composite material while winding a plurality of circles around the outer side of the central body (22), pushing the pressing block (23) to extrude towards the central body (22) to shape the continuous fiber reinforced thermoplastic composite material, cooling, separating the pressing block (23) from the central body (22), and taking down the continuous fiber reinforced thermoplastic composite material from the central body (22) to form an outer peripheral layer reinforcing part (11);
the second step is that: and (2) heating the outer peripheral layer reinforcing piece (11) again, putting the outer peripheral layer reinforcing piece into an injection mold, respectively placing a metal steel sleeve (12) at two ends of the inner part of the outer peripheral layer reinforcing piece, then injecting a long fiber reinforced thermoplastic composite material or a short fiber reinforced thermoplastic composite material into a space between the outer peripheral layer reinforcing piece (11) and the metal steel sleeves (12), pressing a rubber metal spherical hinge (13) into the two metal steel sleeves (12) after demolding, and completing the manufacturing of the thrust rod (1).
2. The method of manufacturing a lightweight composite thrust rod of claim 1, wherein: the metal steel sleeve (12) between the peripheral layer reinforcing piece (11) and the rubber metal spherical hinge is designed into two ends of the central body (22), and the strip-shaped continuous fiber reinforced thermoplastic composite material is directly contacted with the outer side of the metal steel sleeve (12) during winding.
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| CN202110176555.1A CN113043527B (en) | 2021-02-09 | 2021-02-09 | Manufacturing method of lightweight composite thrust rod |
| DE112021006327.8T DE112021006327T5 (en) | 2021-02-09 | 2021-03-09 | Method for producing a lightweight composite push rod and its structure |
| DE212021000507.1U DE212021000507U1 (en) | 2021-02-09 | 2021-03-09 | A lightweight composite push rod |
| PCT/CN2021/079675 WO2022170653A1 (en) | 2021-02-09 | 2021-03-09 | Manufacturing method for and structure of lightweight composite thrust rod |
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| CN202110176555.1A CN113043527B (en) | 2021-02-09 | 2021-02-09 | Manufacturing method of lightweight composite thrust rod |
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