CN112356459B - Forming process and device for composite automobile B column - Google Patents
Forming process and device for composite automobile B column Download PDFInfo
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- CN112356459B CN112356459B CN202011115790.XA CN202011115790A CN112356459B CN 112356459 B CN112356459 B CN 112356459B CN 202011115790 A CN202011115790 A CN 202011115790A CN 112356459 B CN112356459 B CN 112356459B
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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
- B29C70/34—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 and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/345—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 and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
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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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
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- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a molding process and a molding device of a composite automobile B column, wherein the molding process comprises the following steps: chemically treating the surface of the metal framework for later use; sequentially stacking the carbon fiber prepreg, the metal framework and the carbon fiber prepreg in a die-casting forming die, laminating and pressing to form the carbon fiber prepreg; and demolding after molding to obtain the composite automobile B column. Forming device is including the metal forging structure (10) and the die-casting shaping structure that set up in order, just metal forging structure (10) with be provided with butt joint transport structure (20) between the die-casting shaping structure, butt joint transport structure (20) are used for with the warp metal framework after metal forging structure (10) is handled with transport extremely after the laminating of carbon fiber prepreg docks the die-casting shaping structure. The technical problems that the performance of an automobile B column bonded in the prior art has certain defects, and batch production is difficult to effectively realize in bonding operation, so that the production efficiency is low are solved.
Description
Technical Field
The invention relates to the field of automobile B-pillar manufacturing, in particular to a molding process and a molding device of a composite automobile B-pillar.
Background
The automobile B column is a column between front and rear doors of an automobile, is connected with an automobile ceiling and a chassis, plays a vital role in the strength of the side face of the automobile, and can bear most impact force when the automobile is subjected to side collision.
At present, the B column of the automobile is usually manufactured in a mode that a metal layer and a carbon fiber composite layer are bonded together, and the metal layer used here is generally made of steel, so that the structural weight is greatly reduced while the mechanical property is met, and the light weight effect is realized.
However, this method is mainly based on the adhesion of the carbon fiber composite layer and the steel plate, the performance of the adhesion part will greatly affect the performance of the B-pillar, and the adhesion part is often still in a relatively separated state between the steel plate and the carbon fiber composite layer, thereby resulting in great compromise of the overall mechanical properties. Moreover, since the bonding performance has a large influence on the overall performance, the operation requirements of the bonding process are also very strict, which also makes it difficult to effectively realize mass production in the whole process.
Moreover, since the composite adhesive is a product obtained by composite adhesion, a plurality of manual processes are often required to be involved in manufacturing the composite adhesive, which results in a large amount of labor and material costs, and thus a significant increase in production costs.
Disclosure of Invention
The invention aims to provide a forming process and a forming device of a composite automobile B column, and aims to solve the technical problems that the performance of the adhered automobile B column in the prior art has certain defects, and the adhesion operation is difficult to effectively realize batch production, so that the production efficiency is low.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
a molding process of a composite automobile B column comprises the following steps:
chemically treating the surface of the metal framework for later use;
sequentially stacking the carbon fiber prepreg, the metal framework and the carbon fiber prepreg in a die-casting forming die, laminating and pressing to form the carbon fiber prepreg;
and demolding after molding to obtain the composite automobile B column.
As a preferred scheme of the invention, the metal framework is an aluminum alloy framework, and the surface treatment method of the metal framework comprises degreasing, primary water washing, deoxidation treatment, secondary water washing, oxidation treatment, tertiary water washing and drying which are sequentially carried out; wherein the content of the first and second substances,
the deoxidation treatment comprises acid washing and/or alkali washing;
the oxidation treatment is to form an oxide layer on the surface of the metal framework by adopting a coating agent;
before the die is sequentially stacked, the surface of the die is treated, and then the die is heated to 60-80 ℃;
the die temperature in the integrated die-molding process is 120-150 ℃;
the pressure of the pressing die is 15-30 MPa.
As a preferable aspect of the present invention, the carbon fiber prepreg includes at least a carbon fiber web, and a resin material covering the carbon fiber web;
the glass transition temperature of the resin material is greater than 110 ℃;
the manufacturing method further comprises embossing and molding the side face, facing the metal framework, of the carbon fiber prepreg before stacking;
after the metal framework is subjected to oxidation treatment, polishing the surface of the metal framework to form a rough surface;
after the metal framework is washed by water for three times, the metal framework is placed in a silane coupling agent for soaking and then dried;
the integrated compression molding process comprises a primary constant-pressure section, a variable-pressure section and a secondary constant-pressure section which are sequentially carried out; and the number of the first and second electrodes,
the pressure of the primary constant pressure section is greater than that of the secondary constant pressure section, and the die pressing time of the primary constant pressure section is less than that of the secondary constant pressure section;
the variable pressure section carries out die pressing alternately by a first pressure value and a second pressure value, and the first pressure value and the second pressure value are positioned between the pressure values of the first constant pressure section and the second constant pressure section.
In order to solve the above technical problems, the present invention further provides the following technical solutions:
an integrated casting forming device for the process is used for integrally finishing surface treatment of a metal framework and forming of a composite automobile B column, and comprises a metal forging structure and a die-casting forming structure which are sequentially arranged, wherein a butt joint transfer structure is arranged between the metal forging structure and the die-casting forming structure, and the butt joint transfer structure is used for transferring the metal framework treated by the metal forging structure and the carbon fiber prepreg to the die-casting forming structure after being jointed and butted; wherein the content of the first and second substances,
the metal forging structure carries out forged last mould and lower mould including the cooperation at least, it is provided with climbing mechanism still telescopically on the interior bottom surface of lower mould, keep away from in the lower mould one side of die-casting shaping structure is provided with the spacing pushing mechanism that can follow the horizontal direction and remove, just spacing pushing mechanism is used for pushing away the metal skeleton who rises through climbing mechanism jack-up to on the butt joint transport structure.
As a preferable scheme of the present invention, the lower mold includes a mold body formed as a frame body, and a movable bottom plate movably disposed inside the mold body, at least one set of opposite inner walls of the mold body is recessed inward along a circumferential direction to form a fitting groove, and at least one end of the movable bottom plate is fitted in the fitting groove;
when one end of the movable bottom plate is in contact with the inner side wall of the embedding groove, a gap is formed between the other end of the movable bottom plate and the die body;
the jacking mechanism comprises a group of jacking assemblies which can move up and down and are at least partially positioned below the gaps on two opposite sides.
As a preferred scheme of the present invention, each of the jacking assemblies includes a first jacking section located below the gap, a second jacking section located above the movable bottom plate, and a supporting member for supporting the metal framework;
the first jacking section comprises an expansion link and a fitting block positioned in the expansion link and close to one side of the movable bottom plate, and a fitting groove fitted with the fitting block is formed in the lower surface of the supporting piece;
an annular extending edge is formed by extending the side surface of the supporting piece outwards, a cavity is formed inside the annular extending edge, a suction through hole is formed in one side of the cavity facing the metal framework, and a suction structure is communicated with the cavity;
the second jacking section penetrates through the side wall of the lower die and extends, an insertion block is formed at one end, facing the inner side of the lower die, of the second jacking section, and an insertion port in butt joint with the insertion block is formed on the side wall of the bearing piece.
In a preferred embodiment of the present invention, the limit pushing structure includes a support that can move laterally or longitudinally on a horizontal plane and/or a vertical plane, and a pushing member disposed in cooperation with the support.
As a preferable scheme of the invention, the butt joint transferring structure comprises a positioning frame arranged corresponding to the limiting pushing structure, and sucker assemblies movably arranged above and below the positioning frame;
the positioning frame comprises a first limiting track and a second limiting track which are respectively matched with the side surfaces of the two end parts of the metal framework, and a contact part is arranged at one end, far away from the limiting pushing structure, of the first limiting track and/or the second limiting track;
the sucking disc subassembly includes the support of portable setting in horizontal direction and vertical direction, and set up in adsorption part on the support, just adsorption part with be formed with positioning control portion between first spacing track and/or the second spacing track.
As a preferable aspect of the present invention, the positioning control portion includes a positioning slot disposed on an upper surface of the first limiting rail and/or the second limiting rail, and a positioning insertion block extending downward or upward from an end of the adsorption portion; wherein the content of the first and second substances,
a positioning seat matched with the positioning plug block is formed on the bottom surface of the positioning slot, and the bottom surface of the positioning slot is connected with the positioning seat through a pressure reducing spring;
the end face of the positioning insertion block is provided with a pressure sensor, and when the pressure detected by the pressure sensor reaches a preset value, the positioning control part controls the support to drive the sucker component to be close to the positioning frame.
As a preferable scheme of the present invention, the first limiting rail and the second limiting rail each include two oppositely disposed guide rails, and the two opposite guide rails can be close to or far from each other.
Compared with the prior art, the invention has the following beneficial effects:
1) the structure that the carbon fiber prepreg, the metal framework and the carbon fiber prepreg are sequentially attached is adopted to construct and form a sandwich-type structure, so that the interlaminar compound degree and the coupling property between the whole metal framework and the composite fiber layer are improved, and the contact boundary defect caused by adhesion is greatly reduced;
2) the surface treatment is carried out on the metal framework before the die pressing, so that the effective coupling of the whole structure in the die pressing process is effectively improved;
3) the whole process does not adopt any bonding process, the carbon fiber prepreg, the metal framework and the carbon fiber prepreg are directly molded by pressing after being attached and placed, and the integrated molding process not only can further improve the interlaminar compound degree of the materials, but also can greatly improve the production efficiency and effectively realize large-scale batch production;
4) through set up the butt joint between metal forging structure and die-casting shaping structure and transport the structure, based on the cooperation of jacking structure and spacing promotion structure, push away metal framework to the butt joint transport structure on, the rethread butt joint is transported the structure and is pasted the upper and lower surface of metal framework with carbon fiber preimpregnation material after, directly carries out die-casting shaping in die-casting shaping mould, and whole structure is accomplished based on the device is integrative completely, need not artificial intervention, greatly reduced manpower and materials cost, raise the efficiency, reduction in production cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
FIG. 1 is a flow chart of a molding process provided by an embodiment of the present invention;
FIG. 2 is a schematic partial structural view of a molding apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a lower mold according to an embodiment of the present invention in one state;
FIG. 4 is an enlarged view of a portion A of FIG. 2;
FIG. 5 is a partial cross-sectional view of a first curb rail and a second curb rail provided in accordance with an embodiment of the invention;
FIG. 6 is a schematic partial structure view of a forged metal structure according to an embodiment of the present invention;
fig. 7 is a schematic partial structural view of a fixing seat and a lower die provided in an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a die-casting mold according to an embodiment of the present invention;
FIG. 9 is a schematic view of a portion of a lower core according to an embodiment of the present invention;
fig. 10 is a schematic structural view of a positioning snap provided in the embodiment of the present invention.
The reference numerals in the drawings denote the following, respectively:
1-a fixed seat; 2-a movable seat; 5-a cavity; 6-jack; 7-wedge block; 8-T-shaped blocks;
31-a substrate; 32-a frame; 33-an elastic press plate; 34-an elastic return element; 35-a die head; 36-a limiting guide groove; 37-limit convex strip.
10-metal forging structure; 20-a docking transport structure; 30-upper template; 40-a lower template; 50-jacking structure; 60-heating the flow channel;
101-upper mould; 102-a lower die; 103-a jacking mechanism; 104-a limit pushing mechanism;
1021-a mould body; 1022-a movable floor; 1023-fitting groove;
1031-telescopic rod; 1032-a fit block; 1033-a support; 1034-fitting the slot; 1035 — annular extending edge; 1036-suction through holes; 1037-a patch block; 1038-a socket;
1041-support; 1042-a pusher;
201-a first limit track; 202-a second limit track; 203-a contact; 204-an adsorption part; 205-a scaffold; 206-a guide rail;
301-upper core; 302-an extension baffle;
401-lower core; 402-an opening; 403-positioning snap; 404-a groove guiding section; 405-a snap-fit section; 406-a first snap gap; 407-a second snap gap; 408-connecting the inclined plane; 409-a guide block;
501-a thimble mounting plate; 502-thimble.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides a molding process of a composite automobile B-pillar, wherein the composite automobile B-pillar comprises a carbon fiber prepreg (a first composite carbon fiber layer), a metal framework and a carbon fiber prepreg (a second composite carbon fiber layer) which are sequentially attached, and the molding process specifically comprises the following steps:
chemically treating the surface of the metal framework for later use;
sequentially stacking the carbon fiber prepreg, the metal framework and the carbon fiber prepreg in a die-casting forming die, laminating and pressing to form the carbon fiber prepreg;
and demolding after molding to obtain the composite automobile B column.
The method comprises the following steps of firstly, realizing effective protection of a metal framework by attaching composite carbon fiber layers to two sides of the metal framework, further improving the interlaminar compound degree and coupling property of the metal framework and the composite carbon fiber layers, and improving the physical and chemical service performance of the whole B column. After the surface of the metal framework is treated, the production efficiency is greatly improved based on the processing technology of integrated compression molding, large-scale batch production is realized, and meanwhile, the quality problem caused by the bonding technology in the prior art is solved; meanwhile, the light structure is guaranteed while the physical and chemical properties such as strength are improved based on the arrangement of the sandwich structure and an integrated forming process.
In a preferred embodiment of the present invention, in order to further improve the overall lightweight high-strength performance, the materials of the metal framework and the composite carbon fiber layer are further defined, specifically, the first composite carbon fiber layer and/or the second composite carbon fiber layer is a carbon fiber prepreg;
the metal framework is an aluminum alloy framework.
Further, in order to better improve the coupling performance between the composite carbon fiber layer and the metal framework and effectively improve the overall physical and chemical use performance, the first composite carbon fiber layer and/or the second composite carbon fiber layer at least comprise a carbon fiber net and a resin material for coating the carbon fiber net;
the glass transition temperature of the resin material is greater than 110 ℃.
In a more preferred embodiment, the manufacturing method further includes embossing the side surfaces of the first carbon composite fiber layer and the second carbon composite fiber layer facing the metal skeleton before stacking. Specifically, the embossing process herein may emboss-form the side surface facing the metal skeleton with a net-like stamper under the condition of heating to soften the resin material.
In another preferred embodiment of the present invention, the metal skeleton surface treatment method comprises degreasing, primary water washing, deoxidation treatment, secondary water washing, oxidation treatment, tertiary water washing and drying which are sequentially performed; wherein the content of the first and second substances,
the deoxidation treatment comprises acid washing and/or alkali washing;
and the oxidation treatment is to form an oxide layer on the surface of the metal framework by adopting a coating agent. The coating agent herein may be of a type that can be understood and used by those skilled in the art, and may be, for example, a conventionally used phosphorus-containing coating agent.
Further, after the metal framework is subjected to oxidation treatment, the surface of the metal framework is polished to form a rough surface. The grinding mode here can be operated accordingly in a manner that can be understood and used by those skilled in the art.
And after the metal framework is washed by water for three times, the metal framework is placed in a silane coupling agent for soaking and then dried. Of course, the placing of the metal skeleton in the silane coupling agent herein may be performed under heating conditions so that the silane coupling agent is bonded to the surface of the metal skeleton after the surface treatment.
In a further preferred embodiment, before the mold is sequentially stacked, the method further comprises treating the surface of the mold, and then heating the mold to 60-80 ℃. Of course, the mold surface treatment herein includes any step that one skilled in the art would need to further manipulate before using the mold.
In a more preferred embodiment, the molding temperature of the integrated molding process is 120-150 ℃;
the pressure of the pressing die is 15-30 MPa.
Further, the integrated compression molding process comprises a primary constant pressure section, a variable pressure section and a secondary constant pressure section which are sequentially carried out; and the number of the first and second electrodes,
the pressure of the primary constant pressure section is greater than that of the secondary constant pressure section, and the die pressing time of the primary constant pressure section is less than that of the secondary constant pressure section;
the variable pressure section carries out die pressing alternately by a first pressure value and a second pressure value, and the first pressure value and the second pressure value are positioned between the pressure values of the first constant pressure section and the second constant pressure section.
It should be noted that the manufacturing method of the present invention manufactures an independent B-pillar inner panel or B-pillar outer panel, and the further combination of the inner panel and the outer panel may be manufactured by welding or further heating and pressing to mold, which will not be described herein.
Of course, the design of the sandwich structure based on the B column of the composite automobile needs to further increase manpower and the like to carry out a plurality of composite processes, on the basis, in order to effectively reduce the cost of manpower and material resources and improve the production efficiency on the improvement of the structure, the invention further provides an integrated casting and forming device for the process, for integrally finishing the skin treatment of the metal framework and the molding of the composite automobile B-pillar, as shown in FIGS. 2 to 7, which comprises a metal forging structure 10 and a die-casting forming structure which are arranged in sequence, wherein a butt joint transfer structure 20 is arranged between the metal forging structure 10 and the die-casting forming structure, the butt joint transferring structure 20 is used for jointing and butt-jointing the metal framework processed by the metal forging structure 10 and the carbon fiber prepreg and transferring the jointed and butt-jointed metal framework and the carbon fiber prepreg to the die-casting molding structure; wherein the content of the first and second substances,
the metal forging structure 10 carries out forged last mould and lower mould 102 including the cooperation at least, it is provided with climbing mechanism 103 still telescopically on the interior bottom surface of lower mould 102, keep away from in the lower mould 102 one side of die-casting shaping structure is provided with the spacing pushing mechanism 104 that can follow the horizontal direction and remove, just spacing pushing mechanism 104 is used for pushing away the metal skeleton who rises through climbing mechanism 103 on the butt joint transporting structure 20.
The above-mentioned device sets up based on the cooperation of metal forging structure 10 and die-casting shaping structure, realize metal framework's shaping and the integration shaping of laminating die-casting, and, further set up butt joint transport structure 20 between the two, through butt joint transport structure 20 will need the metal framework of the two-layer carbon fiber preimpregnation material direct laminating after handling of laminating of metal framework upper and lower surface, and further transport and carry out follow-up operation to die-casting shaping structural on, thereby effectively realize the realization of the integration of whole process, and need not completely with the help of dependent manual operation, and the machining efficiency is greatly improved.
In a preferred embodiment of the present invention, the lower mold 102 includes a mold body 1021 formed as a frame body, and a movable bottom plate 1022 movably disposed inside the mold body 1021, at least one set of opposite inner walls of the mold body 1021 is recessed inward along a circumferential direction to form a fitting groove 1023, and at least one end of the movable bottom plate 1022 is fitted in the fitting groove 1023;
when one end of the movable bottom plate 1022 contacts with the inner side wall of the engagement groove 1023, a gap is formed between the other end of the movable bottom plate 1022 and the mold body 1021;
the jacking mechanism 103 comprises a set of jacking assemblies which can move up and down and are at least partially positioned below the gaps on two opposite sides.
Specifically, the mold body 1021 may be a square frame, and a set of opposite side surfaces is formed with a fitting groove 1023 for movement of the movable bottom plate 1022, in order to better avoid problems such as poor sealing performance between the movable bottom plate 1022 and the mold body 1021, an extension groove may be further formed in the mold body 1021 on two side walls adjacent to the side wall provided with the fitting groove 1023, and the movable bottom plate 1022 may be engaged in the extension groove and move in the extension groove along a connection direction of the opposite fitting grooves 1023.
Through the arrangement mode, when the movable bottom plate 1022 moves left and right in the embedding groove 1023, the gap in the movable bottom plate can be exposed, and the jacking mechanism 103 can effectively realize jacking on two sides.
Further, for the metal forging structure 10, only from the structure on the die pressing film, the following design can be made (note that, the design related to the jacking mechanism 103 is not given here, and only the design related to the relevant structures of the upper die 101 and the lower die 102 is given here, the jacking mechanism 103 only needs to be arranged above and below the die head 35 respectively, and the die head 35 here can be equivalent to the movable bottom plate 102, i.e. the structure of the die plate for die pressing molding):
the device comprises a fixed seat 1 and a movable seat 2 which is movably arranged above the fixed seat 1 relative to the fixed seat 1; wherein the content of the first and second substances,
a lower die 102 is arranged on one side of the fixed seat 1 facing the movable seat 2, and an upper die 101 matched with the lower die 102 is arranged on one side of the movable seat 2 facing the fixed seat 1;
a cavity 5 is formed in the fixed seat 1 and/or the movable seat 2, and a heating assembly is placed in the cavity 5;
a plurality of insertion holes 6 with a plurality of axial directions perpendicular to the extending direction are formed in the upper die 101 and the lower die 102 in a penetrating manner along the extending direction, and a heating pipe can be inserted and installed in each insertion hole 6.
Whole structure is through setting up the cavity in fixing base 1 and/or removal seat 2, and the corresponding application places heating element, thereby preheat through heating element on fixing base 1 and/or removal seat 2, realize the controllability of the temperature of whole structure, further through last jack 6 that extends the setting on mould 101 and the lower mould 102, and through installing the heating pipe in jack 6, and then carry out further heating to whole mould 101 and lower mould 102, improve the validity of whole forming die's heating. No matter whether heating operation exists before the aluminum alloy is fed into the die or not, the temperature can be further increased, the forming degree of compression forming is improved on the basis, and the shrinkage problem and the brittleness problem caused by local cooling are avoided.
In a preferred embodiment of the present invention, each of the upper mold 101 and the lower mold 102 includes a substrate 31 fixedly disposed on the fixed seat 1 or the movable seat 2, a frame 32 extending upward from an outer side surface of the substrate 31, and an elastic pressing plate 33 disposed in the frame 32, and the elastic pressing plate 33 is connected to the substrate 31 through an elastic restoring element 34, and a die head 35 is connected to a side of the elastic pressing plate 33 away from the substrate 31, and the die head 35 can be abutted by the frame 32.
Through the design, the pressing of different pressures at least twice can be realized through the structure of the die per se on the premise of not changing the pressurizing strength of the electric device, and the service performance of the formed aluminum alloy framework is further improved. The pressing with different pressures for multiple times is mainly determined by driving the pressing height between the upper die 101 and the lower die 102, when the frame 32 on the upper die 101 and/or the lower die 102 is not attached to the die head 35, the pressing is performed through the elastic pressing plate 33, different pressing pressures can be correspondingly realized only by controlling the compression height of the elastic pressing plate 33, and in the last pressing process, the frame 32 can be attached to the die head 35, so that the maximum pressing force is realized.
It should be noted that the frame 32 may not be a rectangular frame, and may be formed by a set of opposite side plates and arranged to extend along the extending direction, which may be a relatively long side of the entire mold. The insertion hole 6 may be provided in the elastic pressing plate 33. And is provided extending inwardly from the side on which the frame 32 is not provided.
In another preferred embodiment of the present invention, when the elastic reset element 34 is in the initial state, one surface of the elastic pressing plate 33 away from the substrate 31 is disposed to protrude from the end surface of the frame 32.
In a further preferred embodiment, a limiting guide groove 36 is formed on the inner surface of the frame 32 along the extending direction of the elastic resetting element 34, a limiting convex strip 37 matched with the limiting guide groove 36 is formed on the outer side surface of the elastic pressing plate 33, a gap is formed between the limiting guide groove 36 and the limiting convex strip 37, and a lubricating oil supply structure is communicated in the gap.
Of course, in order to better and uniformly heat the upper die 101 and the lower die 102 on the premise that the entire heating pipe is uniformly arranged, the plurality of insertion holes 6 on the upper die 101 are linearly arranged in an extending direction;
the plurality of insertion holes 6 on the lower die 102 extend in a wave shape along the extending direction.
In a further preferred embodiment, the fixed seat 1 and the lower die 102 and/or the movable seat 2 and the upper die 101 are fixedly connected by a plurality of raised wedges 7, and a gap is formed between two adjacent wedges 7. Thereby guaranteeing a certain heat dissipation clearance and avoiding the problem that the temperature of the local part, especially the middle position, is too high and the whole temperature difference is large.
In a further preferred embodiment, the fixed seat 1 and the movable seat 2 are respectively provided with a T-shaped block 8 which is arranged oppositely, and a group of the T-shaped blocks 8 which are arranged oppositely are matched for positioning.
In a further preferred embodiment, in order to effectively implement the jacking process, each jacking assembly includes a first jacking section located below the gap, a second jacking section located above the movable bottom plate 1022, and a supporting member 1033 for supporting the metal framework;
the first jacking section comprises a telescopic rod 1031 and a fitting block 1032 positioned on one side of the telescopic rod 1031 close to the movable bottom plate 1022, and a fitting groove 1034 matched with the fitting block 1032 is formed on the lower surface of the supporting member 1033;
an annular extending edge 1035 is formed by extending the side surface of the supporting piece 1033 outwards, a cavity is formed inside the annular extending edge 1035, a suction through hole 1036 is formed in one side of the cavity facing the metal framework, and a suction structure is communicated with the cavity;
the second jacking section penetrates through the side wall of the lower die 102 to extend, an insertion block 1037 is formed at one end of the second jacking section facing the inner side of the lower die 102, and an insertion port 1038 butted with the insertion block 1037 is formed on the side wall of the bearing piece 1033.
Through the matching arrangement between the matching block 1032 on the first jacking section and the bearing 1033, when the gap is exposed, the metal framework is adsorbed by the annular extending edge 1035 of the bearing 1033 to fix and support the metal framework and the bearing 1033, and meanwhile, through the matching arrangement between the insertion block 1037 and the insertion port 1038, the bearing 1033 is further separated from the first jacking section and connected with the second jacking section, and at this time, the telescopic rod 1031 in the first jacking section retracts; the movable base plate 1022 moves in the opposite direction to expose the gap on the other side, and the above steps are repeated to complete the stable connection of the two sides of the metal framework.
In a further preferred embodiment, the limiting pushing structure comprises a support 1041 capable of moving transversely or longitudinally on a horizontal plane and/or a vertical plane, and a pushing member 1042 arranged to cooperate with the support 1041.
Of course, it should be noted that the support bracket 1041 may further include a movable frame capable of moving transversely or longitudinally on a horizontal plane and/or a vertical plane, and a support assembly engaged with the metal frame portion and disposed at an end portion of the movable frame, and of course, the support assembly may be composed of a plurality of specific support plates, and the support effect may be effectively achieved by a plurality of support plates engaged with the bottom surface portion of the metal frame. Here, as long as make it can stably bear metal framework and drive its removal can, specific structure can carry out the pertinence setting according to actual conditions, does not need here to do much to describe again.
In a further preferred embodiment, the docking and transferring structure 20 includes a positioning frame corresponding to the limit pushing structure, and a suction cup assembly movably disposed above and below the positioning frame;
the positioning frame comprises a first limiting track 201 and a second limiting track 202 which are respectively matched with the side faces of the two end parts of the metal framework, and a contact part 203 is arranged at one end, far away from the limiting pushing structure, of the first limiting track 201 and/or the second limiting track 202;
the sucker assembly comprises a support 205 and an adsorption part 204, the support 205 is movably arranged in the horizontal direction and the vertical direction, the adsorption part 204 is arranged on the support 205, and a positioning control part is formed between the adsorption part 204 and the first limiting track 201 and/or the second limiting track 202.
Because metal framework often both ends are not on same horizontal plane, and often both ends outwards extend there is extension structure, on this basis, through the setting of first spacing track 201 and second spacing track 202, make metal framework's both ends move on first spacing track 201 and second spacing track 202 respectively, thereby can be through adjusting the vertical height between first spacing track 201 and the second spacing track 202 can the pertinence effectively realize holistic location removal through the sliding to the extension structure of the side at metal framework both ends.
The sucking disc subassembly then is used for adsorbing carbon fiber preimpregnation material to extrude the metal framework and drive holistic removal with the carbon fiber preimpregnation material of upper surface and lower surface, thereby make directly go into the mould behind the attached stromatolite and carry out integration press mold shaping, better avoid manual operation.
In order to enable the metal framework to be effectively attached to the carbon fiber prepregs on two sides and improve the accuracy of the attaching position, the positioning control part comprises positioning slots arranged on the upper surfaces of the first limiting rail 201 and/or the second limiting rail 202 and positioning insertion blocks extending downwards or upwards from the end parts of the adsorption parts 204; wherein the content of the first and second substances,
a positioning seat matched with the positioning plug block is formed on the bottom surface of the positioning slot, and the bottom surface of the positioning slot is connected with the positioning seat through a pressure reducing spring;
the end face of the positioning insertion block is provided with a pressure sensor, and when the pressure detected by the pressure sensor reaches a preset value, the positioning control part controls the support 205 to drive the sucker component to be close to the positioning frame.
Therefore, through the matching of the positioning slot and the positioning insertion block and the detection of pressure, whether the positioning insertion block is inserted into the positioning slot or not is effectively determined, the sucking disc assembly is enabled to be close to the positioning frame after the positioning slot and the positioning insertion block are inserted in a matching mode, and the accurate fitting of the positions of the metal framework and the carbon fiber prepreg is achieved.
In a further preferred embodiment, the first position-limiting track 201 and the second position-limiting track 202 each include two oppositely disposed guide rails 206, and the two opposite guide rails 206 can approach or depart from each other. After the bonding, the guide rail 206 is moved away from the opposite direction, so that the clamped metal framework is released, and the whole body is driven by the adsorption part 204 to enter the next process.
Of course, the die-casting structure, i.e. the die-casting mold, may be further designed as follows in order to better adapt to the transportation of the composite automobile B-pillar after the absorption and lamination:
specifically, as shown in fig. 8 to 10, the mold comprises an upper template 30 and a lower template 40 which are oppositely arranged and can be close to or far away from each other, an upper core 301 is formed in the upper template 30 in an extending manner towards one side of the lower template 40, and a lower core 401 with a mold cavity inside is formed in the lower template 40 in an extending manner towards one side of the upper template 30; wherein the content of the first and second substances,
an opening 402 is formed on one side wall of the lower core 401, a plurality of positioning clamping protrusions 403 are formed on two inner side walls adjacent to the side wall on which the opening 402 is formed along the extending direction, and an extending baffle plate 302 for closing the opening 402 is further formed on the side wall of the upper core 301 which is matched with the side wall on which the opening 402 is formed and extends downwards;
the lower template 40 is also provided with a jacking template on the upper surface in the die cavity through a jacking structure 50, and the jacking structure 50 jacks the jacking template to be close to or far away from the upper template 30.
Through the mode that sets up opening 402 in the side, effectively realize even if having carried out the pre-assembling, still can the integration get into the mould in, simultaneously, after getting into, can carry out the centre gripping to the material of pre-assembling through the protruding 403 of locator card, can take out supplementary centre gripping frock this moment, the compound die is accomplished and is corresponded the operation, whole structure need not the mould and stacks layer upon layer after opening again, greatly reduced the stack operating time of itself, effectively improved efficiency.
In order to better improve the clamping effect, each positioning clamping protrusion 403 is recessed inwards from the end surface far away from the inner side wall to form a clamping gap;
the positioning convex block 403 includes a guide groove section 404 and an engaging section 405 arranged in sequence along the extending direction, a first engaging gap 406 in the guide groove section 404 and a second engaging gap 407 in the engaging section 405 have the same cross-sectional shape on a plane perpendicular to the extending direction, the cross-sectional area of the first engaging gap 406 is larger than that of the second engaging gap 407, and a connecting inclined plane 408 is formed between the first engaging gap 406 and the second engaging gap 407.
Due to the arrangement mode, pre-assembled materials can conveniently enter the groove guiding section 404, even if the multi-layer materials are not tightly attached, the multi-layer materials can conveniently enter the groove guiding section, and meanwhile, the multi-layer materials further enter the clamping section 405 through the guiding of the connecting inclined surface 408, so that the multi-layer materials are tightly attached.
In a more preferred embodiment, at least one of the upper core 301, the lower core 401 and the jacking formwork has a through heating channel 60 formed therein, and a heating pipe is correspondingly disposed in the heating channel 60.
In a more preferred embodiment, a heating cavity is formed in the positioning locking protrusion 403 in a penetrating manner, a heating sheet is correspondingly placed in the heating cavity, and the heating sheet and the heating pipe are heated synchronously.
Through go up core 301 core 401 down the core with the jacking template and the protruding 403 of location card all corresponds and sets up the heating member, realizes the effective heating of whole mould, avoids the material deformation that local heating inequality caused. Simultaneously, the heating plate and the heating pipe heat synchronously, realize whole synchronous heating effect better to, can be connected heating plate and heating pipe on same power, realize synchro control, more make things convenient for going on of whole operation.
In order to better realize effective positioning and attaching between an upper mold and a lower mold and ensure the stability of a mold after mold closing, a guide groove is formed on part of the lower surface of the upper mold core 301 in an upward concave manner, a guide block 409 matched with the guide groove is correspondingly arranged on part of the upper surface of the lower mold core 401, and the guide block 409 is inserted into the guide groove so that the upper mold core 301 is positioned and clamped with the lower mold core 401.
In another preferred embodiment of the present invention, in order to better improve the jacking effect of the jacking structure 50, the jacking structure 50 includes a thimble mounting plate 501 disposed on the upper surface of the mold cavity, thimbles 502 equally disposed on the upper surface of the thimble mounting plate 501, a surface of the thimble mounting plate 501, which faces away from the thimble 502, is connected to a telescopic end of a telescopic cylinder, and the jacking template is disposed on the upper surface of the thimble 502.
Jacking is carried out through the ejector pins 502, the ejector pin mounting plate 501 is connected with the telescopic air cylinder, force is relatively evenly distributed, then local uniform force application is carried out through the ejector pins 502, and multi-directional uniform stress on the jacking template can be better achieved.
In order to enable the jacking template to move in a limiting mode better, an annular sliding groove is formed in the inner side wall of the lower mold core 401 in the circumferential direction, and a surrounding edge which is embedded in the annular sliding groove and can slide in the annular sliding groove is formed on the outer surface of the jacking template. The height of the annular groove is greater than the height of the skirt.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made to the disclosure by those skilled in the art within the spirit and scope of the disclosure, and such modifications and equivalents should also be considered as falling within the scope of the disclosure.
Claims (9)
1. A molding process of a composite automobile B column is characterized by comprising the following steps:
chemically treating the surface of the metal framework for later use;
sequentially stacking the carbon fiber prepreg, the metal framework and the carbon fiber prepreg in a die-casting forming die, laminating and pressing to form the carbon fiber prepreg;
demoulding after forming to obtain a composite automobile B column;
the integrated casting forming device is used for integrally finishing the surface treatment of a metal framework and the forming of a composite automobile B column, and comprises a metal forging structure (10) and a die-casting forming structure which are sequentially arranged, a butt joint transferring structure (20) is arranged between the metal forging structure (10) and the die-casting forming structure, and the butt joint transferring structure (20) is used for transferring the metal framework treated by the metal forging structure (10) and the carbon fiber prepreg to the die-casting forming structure after the metal framework and the carbon fiber prepreg are jointed and butted;
wherein, metal forging structure (10) carry out forged last mould and lower mould (102) including the cooperation at least, still telescopically be provided with climbing mechanism (103) on the interior bottom surface of lower mould (102), keep away from in lower mould (102) one side of die-casting shaping structure is provided with spacing pushing mechanism (104) that can follow the horizontal direction and remove, just spacing pushing mechanism (104) are used for with through climbing mechanism (103) top metal framework push away extremely on butt joint transporting structure (20).
2. The molding process according to claim 1, wherein the metal skeleton is an aluminum alloy skeleton, and the surface treatment method of the metal skeleton comprises degreasing, primary water washing, deoxidation treatment, secondary water washing, oxidation treatment, tertiary water washing and drying which are sequentially performed; wherein the content of the first and second substances,
the deoxidation treatment comprises acid washing and/or alkali washing;
the oxidation treatment is to form an oxide layer on the surface of the metal framework by adopting a coating agent;
before the die is sequentially stacked, the surface of the die is treated, and then the die is heated to 60-80 ℃;
the die temperature in the integrated die-pressing molding process is 120-150 ℃;
the pressure of the pressing die is 15-30 MPa.
3. A molding process according to claim 1 or 2, wherein the carbon fiber prepreg comprises at least a carbon fiber web, and a resin material covering the carbon fiber web;
the glass transition temperature of the resin material is greater than 110 ℃;
before stacking, embossing and molding the side face, facing the metal framework, of the carbon fiber prepreg;
after the metal framework is subjected to oxidation treatment, polishing the surface of the metal framework to form a rough surface;
after the metal framework is washed by water for three times, the metal framework is placed in a silane coupling agent for soaking and then dried;
the integrated compression molding process comprises a primary constant-pressure section, a variable-pressure section and a secondary constant-pressure section which are sequentially carried out; and the number of the first and second electrodes,
the pressure of the primary constant pressure section is greater than that of the secondary constant pressure section, and the die pressing time of the primary constant pressure section is less than that of the secondary constant pressure section;
the variable pressure section carries out die pressing alternately by a first pressure value and a second pressure value, and the first pressure value and the second pressure value are positioned between the pressure values of the first constant pressure section and the second constant pressure section.
4. A molding process according to claim 1, wherein the lower mold (102) comprises a mold body (1021) formed as a frame body, and a movable bottom plate (1022) movably disposed inside the mold body (1021), and at least one set of opposing inner walls of the mold body (1021) is recessed inward in a circumferential direction to form a fitting groove (1023), and at least one end of the movable bottom plate (1022) is fitted in the fitting groove (1023);
when one end of the movable bottom plate (1022) is in contact with the inner side wall of the embedding groove (1023), a gap is formed between the other end of the movable bottom plate (1022) and the die body (1021);
the jacking mechanism (103) comprises a group of jacking assemblies which can move up and down and are at least partially positioned below the gaps on two opposite sides.
5. A forming process according to claim 4, wherein each jacking assembly comprises a first jacking section located below the gap, a second jacking section located above the movable base plate (1022), and a bearing (1033) for bearing the metal skeleton;
the first jacking section comprises a telescopic rod (1031) and a fitting block (1032) which is positioned on one side of the telescopic rod (1031) close to the movable bottom plate (1022), and a fitting groove (1034) which is fitted with the fitting block (1032) is formed on the lower surface of the supporting piece (1033);
the side surface of the supporting piece (1033) extends outwards to form an annular extending edge (1035), a cavity is formed inside the annular extending edge (1035), a suction through hole (1036) is formed in one side of the cavity facing the metal framework, and a suction structure is communicated with the cavity;
the second jacking section penetrates through the side wall of the lower die (102) to extend, an insertion block (1037) is formed at one end, facing the inner side of the lower die (102), of the second jacking section, and an insertion port (1038) which is in butt joint with the insertion block (1037) is formed in the side wall of the bearing piece (1033).
6. A moulding process according to claim 5, wherein the limiting and pushing mechanism comprises a support (1041) which is movable laterally or longitudinally in a horizontal and/or vertical plane, and a pusher (1042) arranged to engage the support (1041).
7. A molding process according to claim 3, wherein the docking and transferring structure (20) comprises a positioning frame corresponding to the limit pushing mechanism, and suction cup assemblies movably arranged above and below the positioning frame;
the positioning frame comprises a first limiting track (201) and a second limiting track (202) which are respectively matched with the side faces of the two end parts of the metal framework, and one end, far away from the limiting pushing mechanism, of the first limiting track (201) and/or the second limiting track (202) is provided with a contact part (203);
the sucker component comprises a support (205) which can be movably arranged in the horizontal direction and the vertical direction, and an adsorption part (204) which is arranged on the support (205), wherein a positioning control part is formed between the adsorption part (204) and the first limiting track (201) and/or the second limiting track (202).
8. The molding process according to claim 7, wherein the positioning control part comprises a positioning slot disposed on an upper surface of the first limiting rail (201) and/or the second limiting rail (202), a positioning plug extending downward or upward from an end of the suction part (204); wherein, the first and the second end of the pipe are connected with each other,
a positioning seat matched with the positioning plug block is formed on the bottom surface of the positioning slot, and the bottom surface of the positioning slot is connected with the positioning seat through a pressure reducing spring;
the end face of the positioning insertion block is provided with a pressure sensor, and when the pressure detected by the pressure sensor reaches a preset value, the positioning control part controls the support (205) to drive the sucker component to be close to the positioning frame.
9. A moulding process according to claim 8, wherein the first and second check rails (201, 202) each comprise two oppositely disposed guide rails (206), and the two opposite guide rails (206) are capable of moving towards and away from each other.
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| CN202011115790.XA CN112356459B (en) | 2020-10-16 | 2020-10-16 | Forming process and device for composite automobile B column |
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| CN202011115790.XA CN112356459B (en) | 2020-10-16 | 2020-10-16 | Forming process and device for composite automobile B column |
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| CN114043746A (en) * | 2021-11-15 | 2022-02-15 | 北京计算机技术及应用研究所 | Metal-containing embedded part carbon fiber shell forming method based on vacuum introduction process |
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| CN105339244A (en) * | 2013-06-12 | 2016-02-17 | 蒂森克虏伯钢铁欧洲股份公司 | Side wall group for passenger vehicles |
| CN108583486A (en) * | 2018-04-26 | 2018-09-28 | 奇瑞汽车股份有限公司 | The method of anticollision component and manufacture anticollision component |
| CN110815859A (en) * | 2019-11-29 | 2020-02-21 | 株洲时代新材料科技股份有限公司 | Design and manufacturing method of composite material blade and composite material blade |
| CN111605503A (en) * | 2020-04-14 | 2020-09-01 | 上海凌云工业科技有限公司凌云汽车技术分公司 | Automobile anti-collision protection component assembly and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105339244A (en) * | 2013-06-12 | 2016-02-17 | 蒂森克虏伯钢铁欧洲股份公司 | Side wall group for passenger vehicles |
| CN108583486A (en) * | 2018-04-26 | 2018-09-28 | 奇瑞汽车股份有限公司 | The method of anticollision component and manufacture anticollision component |
| CN110815859A (en) * | 2019-11-29 | 2020-02-21 | 株洲时代新材料科技股份有限公司 | Design and manufacturing method of composite material blade and composite material blade |
| CN111605503A (en) * | 2020-04-14 | 2020-09-01 | 上海凌云工业科技有限公司凌云汽车技术分公司 | Automobile anti-collision protection component assembly and preparation method thereof |
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