CN112265290A - Automobile seat mounting cross beam, manufacturing method thereof and automobile - Google Patents
Automobile seat mounting cross beam, manufacturing method thereof and automobile Download PDFInfo
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- CN112265290A CN112265290A CN202011052809.0A CN202011052809A CN112265290A CN 112265290 A CN112265290 A CN 112265290A CN 202011052809 A CN202011052809 A CN 202011052809A CN 112265290 A CN112265290 A CN 112265290A
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- automobile seat
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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
- 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
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/005—Arrangement or mounting of seats in vehicles, e.g. dismountable auxiliary seats
- B60N2/015—Attaching seats directly to vehicle chassis
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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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- Mechanical Engineering (AREA)
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- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a manufacturing method of an automobile seat mounting beam, and belongs to the field of automobile part production. The method comprises the following steps: the method comprises the steps of obtaining a first mould for manufacturing the automobile seat mounting beam, and paving a reinforcing area on the surface of a groove of the first mould by using carbon fiber prepreg to form a reinforcing layer; continuously using carbon fiber prepreg in the groove for forming the reinforcing layer to lay the whole groove area to form the outer shaping layer; curing the laid first mold to obtain a preformed piece; and carrying out secondary shaping on the preformed piece to obtain the automobile seat mounting cross beam. The seat mounting beam body is formed by using fewer dies at one time, and the subsequent welding and splicing process is omitted. Meanwhile, the weak area is reinforced correspondingly when the layers are laid, and a reinforcement piece is not required to be additionally arranged, so that the traditional manufacturing process is simplified. Moreover, the carbon fiber seat mounting cross beam is light in weight, and meets the requirement of light weight of the whole automobile.
Description
Technical Field
The invention relates to the field of automobile part production, in particular to an automobile seat mounting beam and a manufacturing method thereof, and an automobile.
Background
The automobile seat mounting beam is fixed on the floor of an automobile body and is fixedly connected with a seat, and the automobile seat mounting beam mainly plays a role in mounting and supporting the seat.
In the related art, different dies are required to be used for manufacturing the automobile seat mounting beam, three metal plate parts are manufactured through a stamping process, and the obtained parts are welded together to form the seat mounting beam. In addition, a reinforcing member is further provided on the weak area by welding to increase the strength of the car seat mounting beam.
The inventors have found that the above-described related art has at least the following problems:
in the correlation technique, the mould that preparation car seat installation crossbeam needs is more to need utilize welding process to weld each spare part together and form seat installation crossbeam body, in addition, still need establish in addition the reinforcement and carry out the reinforcement, the process is more, more loaded down with trivial details. And the automobile seat mounting beam is a sheet metal part, so that the weight is large, and the requirement of portability of the whole automobile is not met.
Disclosure of Invention
The embodiment of the invention provides a manufacturing method of an automobile seat mounting cross beam, a manufacturing method of the automobile seat mounting cross beam and an automobile, and the automobile seat mounting cross beam with light weight can be simply manufactured. The specific technical scheme is as follows:
a method of making a vehicle seat mounting beam, the method comprising:
obtaining a first die for manufacturing an automobile seat mounting beam, wherein the first die is provided with a groove matched with the shape of the automobile seat mounting beam;
paving a reinforced area in the groove by using carbon fiber prepreg to form a reinforced layer;
continuously using carbon fiber prepreg to lay the whole groove area in the groove with the reinforcing layer to form a body outer-shaped layer;
curing the laid first mold to obtain a preformed piece;
and carrying out secondary shaping on the preformed piece to obtain the automobile seat mounting cross beam.
Further, the region to be reinforced includes: a first mounting area, a second mounting area and a main bearing area;
the reinforcing layer includes: a first side reinforcement layer, a second side reinforcement layer and an intermediate reinforcement layer separated from each other, the first side reinforcement layer corresponding to the first installation area, the second side reinforcement layer corresponding to the second installation area, the intermediate reinforcement layer corresponding to the main load-bearing area.
Further, the reinforcing layer comprises a plurality of layers of carbon fiber prepregs, wherein the ply angles of the plurality of layers of carbon fiber prepregs are arranged alternately at 45 degrees and-45 degrees.
Further, obtain the first mould of preparation car seat installation crossbeam, include:
cleaning the surface of the groove of the first die;
coating gel coat on the surface of the groove to form a gel coat layer;
and (3) coating a release agent on the gel coat layer.
Further, said post-sizing said preform comprises:
obtaining a second die, wherein the second die is provided with a bulge matched with the shape of the groove;
closing the first mold and the second mold to form a closed mold part;
and injecting resin into the cavity of the composite mold.
Further, after the injecting the resin into the mold cavity of the mold assembly, the method further comprises: and heating the combined mould.
Further, after the heat treatment is performed on the mold assembly after the resin injection, the method further includes:
removing the first die and the second die to obtain a rough blank of the mounting beam of the automobile seat;
and finishing the rough blank of the automobile seat mounting beam.
An automobile seat mounting beam made by any of the above methods.
An automobile comprises the automobile seat mounting cross beam.
Further, the car seat mounting cross beam is connected with the body floor of the car in an adhesive manner.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
according to the manufacturing method of the automobile seat mounting beam provided by the embodiment of the invention, carbon fiber prepreg is laid on a mould, and the automobile seat mounting beam is obtained through curing treatment and secondary shaping. The automobile seat mounting beam is formed by using fewer molds at one time. In addition, in the process of manufacturing the automobile seat mounting beam, the area to be reinforced is correspondingly reinforced at the same time, and a subsequent additional reinforcing piece is not required to be configured, so that the manufacturing process is greatly simplified. In addition, the automobile seat mounting beam manufactured by the manufacturing method is light in weight and meets the requirement of lightening the whole automobile. Moreover, the automobile seat mounting beam manufactured by the method can be connected with the floor of the automobile body in an adhesive mode, so that the requirement on the connection performance of parts can be met, the connection between the carbon fiber composite material and steel can be isolated, and the electrochemical corrosion of the part of the carbon fiber composite material, which is in direct contact with the floor of the automobile body, due to moisture is prevented. In addition, the glue film and the carbon fiber composite material act synergistically, so that vibration and noise can be further reduced, and the comfort level of passengers is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for manufacturing a cross member for mounting a seat of an automobile according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for manufacturing a cross member for mounting a vehicle seat according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of layering in a groove of a first mold according to a method for manufacturing a cross beam for mounting a seat of an automobile provided by an embodiment of the invention;
fig. 4 is a schematic view of a vehicle seat mounting cross member according to an embodiment of the present invention.
The reference numerals denote:
1-a reinforcing layer;
11-a first side reinforcement layer;
12-a second side reinforcement layer;
13-middle reinforced layer
2-a body outer layer;
3-first mould.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, 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.
In one aspect, the present invention provides a method for manufacturing a car seat mounting beam, and fig. 1 is a flowchart of a method for manufacturing a car seat mounting beam according to an embodiment of the present invention, and as shown in fig. 1, the method for manufacturing a car seat mounting beam may include:
step 101, obtaining a first mold for manufacturing the automobile seat mounting beam, wherein the first mold is provided with a groove matched with the shape of the automobile seat mounting beam.
The carbon fiber prepreg contains a resin, and the resin has an odor and is easily cured at a high temperature, so that it is necessary to maintain good ventilation during operation and to keep the ambient temperature at not too high, for example, 15 to 35 ℃.
The first mold may be a glass fiber reinforced plastic mold, or may be an aluminum or steel mold, which is not limited herein.
And 102, paving a region to be reinforced in the groove by using carbon fiber prepreg to form a reinforcing layer.
Further, before laying, the carbon fiber prepreg can be cut in advance according to the shape and the size of an area to be laid, and the cut size at least ensures that the area to be laid can be completely covered, so that the requirement of laying can be met, and the waste of the carbon fiber prepreg can not be caused.
For the carbon fiber prepreg, according to the requirement, a mixed solution is prepared by resin and a curing agent in a certain mass ratio, and carbon fiber cloth is soaked in the mixed solution for a preset time to prepare the carbon fiber prepreg; it is also possible to use the carbon fiber prepreg which has been prepared as it is.
The resin used for preparing the carbon fiber prepreg needs to have good bonding performance and chemical resistance, for example, an epoxy resin can be selected, and other resins with similar performance can be selected.
The carbon fiber cloth has a compact structure, and the strength of the manufactured automobile seat mounting beam can be ensured. The embodiment of the invention can select 12K twill carbon fiber cloth, wherein 12K means that one bundle contains 12000 carbon fiber yarns, and the volume content of the carbon fiber cloth is 55% in a dry state at room temperature.
And 103, continuously using carbon fiber prepreg to lay the whole groove area in the groove with the reinforcing layer to form the outer shaping layer.
And 104, curing the laid first mold to obtain a preformed piece.
And 105, carrying out secondary shaping on the preformed piece to obtain the automobile seat mounting beam.
According to the manufacturing method of the automobile seat mounting beam provided by the embodiment of the invention, carbon fiber prepreg is spread on the surface of the groove of the first mold, and the automobile seat mounting beam is obtained through curing treatment and secondary shaping, so that the automobile seat mounting beam is formed at one time by using fewer molds. In addition, in the process of manufacturing the automobile seat mounting beam, the area to be reinforced is correspondingly reinforced without subsequent arrangement of a reinforcing piece, so that the manufacturing process is greatly simplified.
Fig. 2 is a flowchart of another method for manufacturing a cross beam for mounting a car seat according to an embodiment of the present invention, and as shown in fig. 2, the method for manufacturing the cross beam for mounting a car seat may include:
step 201, cleaning the surface of the groove of the first mold.
The first mold may be, for example, a glass fiber reinforced plastic mold, or an aluminum or steel mold, which is not limited herein.
The first mold is stored for a long time, and dust can be accumulated on the surface. Therefore, the cleaning is needed before the use, which is beneficial to the subsequent process. For the cleaning mode, for example, cleaning cloth can be manually used for cleaning, and in order to save time and labor, the groove of the first mold can also be cleaned by high-pressure air provided by the compressor, and of course, other cleaning modes can also be adopted, which is not limited here.
Step 202, coating a gel coat on the surface of the groove to form a gel coat layer.
In the manufacturing process or the using process of the first mold, a concave defect may occur on the surface of the groove, and if the concave defect is not processed correspondingly, the automobile seat cross beam manufactured by using the first mold with the concave defect also has the defect, so that the concave defect needs to be eliminated in advance. In the embodiment of the invention, the pit defect can be filled by using the gel coat, and particularly, the gel coat can be coated on the surface of the groove of the first mold. And the coating is uniformly coated in the coating process so as to avoid the phenomena of sinking, sagging, stacking and the like. The coating method can be, for example, spraying with a spray gun, or brushing the gel coat on the surface of the groove with a brush. The gel coat is easy to shape, so that specific air drying treatment is not needed, and only a few minutes of waiting is needed to carry out natural air drying.
It should be noted that, since the main component of the gel coat is resin, the gel coat with the same component as the resin used for preparing the carbon fiber prepreg is preferably selected, so that good compatibility can be ensured, and the carbon fiber prepreg can be well attached to the groove of the first mold.
Step 203, a release agent is coated on the gel coat layer.
In order to facilitate the release of the finished vehicle seat cross member, a release agent is usually applied to the gel coat layer. The type of the release agent may be, for example, silicon type, wax type. The silicone release agent may be any one selected from silicone oil, silicone resin methyl branched silicone oil, methyl silicone oil, emulsified methyl silicone oil, oxygen-containing methyl silicone oil, silicone grease, silicone resin, silicone rubber toluene solution, and the like. The wax-based release agent may be any one selected from synthetic paraffin, microcrystalline paraffin, polyethylene wax, and the like. The release agents of the above type are relatively inexpensive and readily available.
And 204, paving a region to be reinforced by using carbon fiber prepreg in the groove of the first mold to form a reinforcing layer.
Since the carbon fiber prepreg contains a resin, the resin itself has an odor and is easily cured at a high temperature, it is necessary to perform the operation in an environment where ventilation is good, drying is performed, and the temperature is maintained at 15 to 35 ℃.
Further, before laying, the carbon fiber prepreg may be cut in advance according to the shape and size of the region to be laid. The cut-out dimensions are at least such as to ensure complete coverage of the area to be laid. Therefore, the requirement of laying can be met, and waste of the carbon fiber prepreg can be avoided.
For the carbon fiber prepreg, according to the requirement, a mixed solution is prepared by resin and a curing agent in a certain mass ratio, and carbon fiber cloth is soaked in the mixed solution for a preset time to obtain the carbon fiber prepreg; it is also possible to use the carbon fiber prepreg which has been prepared as it is.
The resin used for preparing the carbon fiber prepreg needs to have good bonding performance and chemical resistance, for example, an epoxy resin can be selected, and other resins with similar performance can be selected.
The carbon fiber cloth of different structures has different performance, in order to guarantee the intensity of the car seat installation crossbeam that makes, for example select the 12K twill carbon fiber cloth of closely knit structure for use, 12K wherein indicates that a pencil contains 12000 carbon fiber silk.
There are weak areas to be reinforced on the vehicle seat mounting cross member. In the related art, in order to improve the overall performance of the automobile seat mounting cross beam, a reinforcing part is additionally arranged, and the reinforcing part is welded in an area needing reinforcement through a welding mode. In the embodiment, the weak area can be reinforced correspondingly while the automobile seat mounting bracket is formed, so that the manufacturing process is simplified, and the production period is shortened.
Further, the region to be reinforced is divided into a first mounting region, a second mounting region and a main bearing region. For the first and second mounting regions, the vehicle seat is subsequently mounted in both regions, so that threaded holes need to be drilled in both mounting regions. However, drilling the threaded holes can destroy the continuity of the carbon fibers, so that the overall strength of the automobile seat mounting cross beam is weakened, and therefore the embodiment of the invention reinforces the two areas to further improve the strength. While for car seats the main load bearing area in the middle of the cross beam carries most of the pressure from the seat. In order to improve the overall stability of the seat mounting cross beam, the embodiment of the invention reinforces the main bearing area to prevent the main bearing area from being greatly deformed due to the impact of external force.
Specifically, in the present embodiment, a first side reinforcing layer, a second side reinforcing layer, and an intermediate reinforcing layer are provided on the first mounting region, the second mounting region, and the main bearing region, respectively, in correspondence. No overlap occurs between the above-mentioned reinforcing layers. That is, in the stage of laying the reinforcing layer, only the weak area is reinforced, and other areas do not need to be laid, so that the carbon fiber prepreg can be fully utilized. Wherein there is no restriction on the order of laying the different reinforcement layers.
Further, the first side reinforcing layer, the second side reinforcing layer and the middle reinforcing layer each include a plurality of layers of carbon fiber prepregs. And the ply count of the middle reinforcing ply may be set to be less than the ply count of the first and second side reinforcing plies because the first and second attachment areas corresponding to the first and second side reinforcing plies have a weaker strength than the main load bearing area corresponding to the middle reinforcing ply. Wherein, the ply numbers of the first side reinforcing layer and the second side reinforcing layer can be the same or different. Illustratively, the first and second side reinforcing layers each comprise 6 layers of carbon fiber prepreg and the middle reinforcing layer comprises 4 layers of carbon fiber prepreg. Of course, the number of plies is set to satisfy the usability of the cross beam for mounting the car seat and to save the carbon fiber prepreg, and therefore, the specific number of plies is reasonably set from the two aspects, which are only described by way of example and are not a substantial limitation on the number of plies.
Further, because each carbon fiber prepreg ply is orthotropic, the use of different ply angles may impart different properties to the article. In order to maximize the performance of the carbon fibers, in the embodiment of the present invention, ply angles of the plurality of layers of carbon fiber prepregs included in the first side reinforcing layer, the second side reinforcing layer, and the middle reinforcing layer are alternately set at 45 ° and-45 °. The carbon fiber cloth is laid, a more compact structure is formed by the carbon fiber cloth which is overlapped layer by layer, the strength can be further improved, and the carbon fiber prepreg is prevented from being layered due to torsional stress or bending stress when the automobile seat mounting cross beam is used. Generally, the ply angle is an included angle between the carbon fiber direction and an x-axis of a reference coordinate system, the x-axis of the reference coordinate system and the carbon fiber direction is 0 degree, and an operator is taken as the reference coordinate system.
And step 205, continuously using carbon fiber prepreg to lay the whole groove area in the groove for forming the reinforcing layer to form the outer shaping layer.
It should be noted that the body contour layer is used to form the overall contour of the vehicle seat mounting cross member, that is, the body contour layer completely covers the first side reinforcing layer, the second side reinforcing layer and the middle reinforcing layer.
In the embodiment of the invention, the body outline layer is set to contain a plurality of layers of carbon fiber prepregs, and the specific number of the layers is reasonably set from the angle of meeting the service performance of the automobile seat mounting beam and saving materials. Illustratively, the body profile layer comprises 8 layers of carbon fiber prepreg.
If the area to be reinforced has been previously reinforced accordingly, then the ply angle requirements need not be as stringent when laying down the body ply, which illustratively comprises a plurality of layers of carbon fibre prepregs having ply angles of 90 ° and 0 ° arranged alternately.
FIG. 3 is a schematic view of layering in a groove of a first mold according to a method for manufacturing a cross beam for mounting a seat of an automobile provided by an embodiment of the invention. In the embodiment of the invention, the carbon fiber prepreg is firstly paved in the groove of the first die 3 to form the reinforcing layer 1 for reinforcing the weak area. Further, the reinforcement layer 1 includes a first side reinforcement layer 11, a second side reinforcement layer 12, and an intermediate reinforcement layer 13 that reinforce different regions. On the basis of forming the reinforcing layer, laying layers on the whole groove area of the first mold 3 to form a body appearance layer 2 so as to form the whole appearance of the automobile seat mounting beam. Wherein the body outer layer 2 completely covers the first side reinforcing layer 11, the second side reinforcing layer 12 and the middle reinforcing layer 13.
And step 206, curing the laid first mold to obtain a preform.
Since the carbon fiber prepreg is wet during the laying, the carbon fiber prepreg is difficult to cure and set even after the laying is completed. In order to better shape the carbon fiber prepreg and shorten the manufacturing period, the embodiment of the invention carries out curing treatment on the first mold after being laid. The curing process is usually a heat and pressure maintaining process, but other measures for accelerating the curing process may be adopted.
For heating, the embodiment of the present invention may utilize an oven to heat at a preset temperature for a preset time period. The preset temperature may be set between 50 ℃ and 60 ℃ and the preset time period may be set to 1-2 hours. Of course, the settings of the temperature and the time period described above may be adjusted as appropriate. And may also be heated by other heating devices or heating methods, which are not limited herein.
For pressure holding, the ply is tightly attached to the groove surface of the first mold by using high-pressure air. The embodiment of the invention can adopt a bag pressing process to maintain the pressure. The bag-press process is a common thermosetting molding method for composite materials, i.e., suction is used to remove entrapped air, voids, and excess resin from the composite structure. In this embodiment, the following may be specifically mentioned:
firstly, arranging a vacuum bag on the carbon fiber prepreg after laying, arranging vacuumizing air ducts around the first mould, and putting one end of the vacuumizing air duct into the vacuum bag. And then injecting sealant at the edge of the first mold, and sealing the edge of the vacuum bag by using a vacuum film and an adhesive tape to ensure the tightness of the whole system. And finally, connecting the other end of the vacuumizing air duct with a vacuum pump, reducing the air pressure in the closed system to negative atmospheric pressure by using the vacuum pump, and continuously maintaining the pressure for 1-2 hours under the air pressure. By the pressure holding treatment, the carbon fiber prepreg can be bonded to the surface of the recessed groove of the first mold without a gap.
It is preferable that the heating and the pressure holding are performed simultaneously, so that the carbon fiber prepreg can be cured well. For the above embodiment, after the air pressure of the closed system reaches the preset air pressure, the whole closed system may be placed in the step-in oven for heating treatment.
And step 207, carrying out secondary shaping on the preformed piece to obtain the automobile seat mounting beam.
And after the layering is finished, curing to obtain a preform of the automobile seat mounting beam, namely, the shape of the automobile seat mounting beam is not full enough, and the performance of the automobile seat mounting beam does not meet the requirement. Embodiments of the present invention therefore provide for a secondary shaping of the preform, typically by further shaping the preform with a resin. As for the specific operation method, there may be various, and this is explained by an example:
firstly, demolding the preformed piece from the first mold, trimming the redundant edge of the preformed piece so as to facilitate the subsequent secondary shaping, and then putting the trimmed preformed piece back into the groove of the first mold and ensuring that the preformed piece is well attached to the first mold.
And then covering a second mould on the first mould to form a mould combining part, wherein the second mould is provided with a bulge matched with the groove of the first mould, and the edge of the second mould is provided with a resin inlet hole and a resin outlet hole.
The second mold may be made of the same material as the first mold, and the work surface of the second mold may be cleaned before the mold is closed, and a gel coat and a release agent may be sequentially applied to the work surface. The selection of the type of the release agent is the same as that of the first mold, and the description is omitted here.
Then, the mold clamping member is fixed to a mold frame, and a resin injection pipe is connected to the resin inlet hole. For injecting the resin into the cavity of the co-molded part, different ways can be used. For example, the resin can be injected under high pressure, which is a simple and time-saving process, but the resin utilization is not high. The mold cavity can also be vacuumized by a vacuum pump, and the injected resin can be effectively filled under the action of negative pressure. It should be noted that when the resin outlet hole of the second mold has resin overflow, the mold cavity of the mold closing part is substantially filled at this time. However, it is preferable not to stop the resin injection immediately at this time because it takes a certain time for the resin to be absorbed by the carbon fiber prepreg of the layer, and therefore, the resin overflow does not necessarily represent that the absorption capacity of the carbon fiber prepreg with respect to the resin reaches a saturated state. The resin can be continuously injected for 30-40 minutes on the basis of the above-mentioned operation, so that the absorption of the carbon fiber prepreg to the resin can be saturated.
It should be noted that the type of resin injected into the cavity of the mating mold is preferably the same as the type of resin used to prepare the carbon fiber prepreg, so that good compatibility is ensured and resin filling is facilitated.
Further, for the composite member after resin injection, a heating treatment may be performed to accelerate the curing process. For example, the mold clamp is placed in an oven and heated at a predetermined temperature for a predetermined period of time. Wherein the preset temperature is set between 80 ℃ and 120 ℃, the preset time is set to 1-2 hours, and the specific values of the preset time and the preset temperature can be set according to specific situations. Of course, other heating devices or curing methods may be used, such as a natural curing method at room temperature, and are not limited herein.
Further, the manufacturing method of the automobile seat mounting beam further comprises the following steps: and removing the first die and the second die to obtain a rough blank of the automobile seat mounting beam, and finishing the rough blank of the automobile seat mounting beam.
And (3) trimming the rough blank of the automobile seat mounting beam, mainly cutting redundant edges of the rough blank to enable the shape of the automobile seat mounting beam to meet the design requirement. If the hardness of the redundant edge is not high, common scissors can be used for trimming; if the hardness of the resin edge is high, the cutting may be performed using a water cutting method. Water cutting, also known as water jet cutting, is a method of cutting materials using high pressure water flow, and is an ideal tool for cutting stainless steel, titanium, high strength light synthetic materials and carbon fiber composite materials. Excessive edges are removed by water cutting, and rough or burred edges are not generated, so that the surface quality of the product is high.
Further, in the embodiment, holes are drilled in the trimmed automobile seat mounting cross beam so as to facilitate the subsequent installation of the automobile seat. Wherein the punching position is located in the first mounting area and the second mounting area.
If the drilling process is omitted, embedded parts with preset sizes can be embedded on the first installation area and the second installation area, and corresponding paving is carried out on the basis of the embedded parts. Therefore, when the automobile seat mounting beam body is formed, the threaded hole is directly formed in the body, the subsequent processing of the threaded hole in the automobile seat beam is avoided, and the manufacturing efficiency is improved. The embedded part is, for example, a rivet nut with a threaded hole. And the preset size of the embedded part is determined according to the specification of the automobile seat mounting beam to be manufactured.
It should be noted that, if the pre-embedding process is to be performed, positioning bosses need to be arranged at corresponding positions of the first mold and the second mold, so that the pre-embedded part can be firmly fixed on the mold.
Furthermore, the obtained automobile seat mounting beam can be subjected to matte treatment, so that the roughness of the outer surface of the automobile seat mounting beam can be improved, the wear resistance is improved, the service life is prolonged, and meanwhile, the attractiveness of the appearance of the automobile seat mounting beam can also be enhanced.
According to the manufacturing method of the automobile seat mounting beam provided by the embodiment of the invention, firstly, carbon fiber prepreg is utilized to carry out laying on the surface of the groove of the first mold. And then carrying out heating and pressure maintaining curing treatment to obtain a preformed piece of the automobile seat mounting beam, and carrying out secondary shaping on the preformed piece by a method of injecting resin into a die cavity of a die assembly piece to obtain a rough blank. And finally, trimming redundant edges around the rough blank to obtain the automobile seat mounting beam. Thereby using less moulds to form the automobile seat beam at one time. In addition, in the process of manufacturing the automobile seat mounting cross beam, a first side reinforcing layer, a second side reinforcing layer and a middle reinforcing layer are correspondingly formed on the first mounting area, the second mounting area and the main bearing area respectively. Namely, the weak area is reinforced by the subareas, the reinforcing piece does not need to be configured subsequently, and the reinforcing piece is welded on the automobile seat mounting beam, so that the manufacturing process is greatly simplified.
It should be understood that the sequence of the steps in the above-described embodiments of the method of the present invention can be appropriately adjusted, and the steps can be increased or decreased according to the circumstances, and the method for manufacturing the cross member for mounting the seat of the vehicle provided by the present invention is not limited to the steps of the method described above and shown in the drawings, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In another aspect, the present invention further provides a car seat mounting cross beam, and fig. 4 is a schematic view of a car seat mounting cross beam provided in an embodiment of the present invention. The automobile seat mounting beam is manufactured by any one of the methods, and the service performance of the automobile seat mounting beam is ensured by the design of partitioned layering reinforcement. And the overall mass of the automobile seat mounting beam is lighter, and the requirement of lightening the whole automobile at present is met. In practice, the rigidity of the two mounting regions of the metal seat mounting cross member produced in the related art and the automobile seat mounting cross member of the invention were respectively tested, and a rigidity comparison table as shown in table 1 was obtained:
TABLE 1 rigidity comparison of the mounting areas
As can be seen from the data of table 1, the rigidity of the automobile seat mounting cross member of the present invention is superior to that of the metal seat mounting cross member manufactured in the related art at both the first mounting region and the second mounting region.
The automobile seat mounting beam provided by the embodiment of the invention is manufactured by any one of the manufacturing methods of the automobile seat mounting beam. The automobile seat mounting beam is light in weight and accords with the trend of light weight of the whole automobile, and the rigidity of the mounting area of the automobile seat mounting beam is superior to that of a metal seat mounting beam manufactured by the related technology.
In yet another aspect, the invention further provides an automobile comprising the automobile seat mounting cross beam manufactured by any one of the method embodiments.
Furthermore, the automobile seat mounting beam is connected with the automobile body floor of an automobile in an adhesive mode, so that the requirement on the connection performance of parts can be met, the carbon fiber composite material and steel can be isolated, and electrochemical corrosion of the direct contact part of the carbon fiber composite material and the automobile body floor due to moisture is prevented. In addition, the glue film and the carbon fiber composite material act synergistically, so that vibration and noise can be further reduced, and the comfort level of passengers is improved.
The structural adhesive used for connecting the car seat mounting beam and the car body floor can be a cyclic resin or an acrylic, for example: DP406 epoxy glue from 3M company, USA, E-120HP structural glue from Henggao company, Germany.
The automobile provided by the embodiment of the invention comprises the automobile seat mounting beam manufactured by any one of the automobile seat mounting beam manufacturing methods. And adopt sticky mode to be connected this car seat installation crossbeam with the automobile body floor of car, both can satisfy the connection performance demand of spare part, can also play the isolation to the connection of carbon-fibre composite with steel, prevent that carbon-fibre composite and automobile body floor direct contact part from producing electrochemical corrosion because of the humidity. In addition, the glue film and the carbon fiber composite material act synergistically, so that vibration and noise can be further reduced, and the comfort level of passengers is improved.
It should be understood that the above-mentioned embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method of making a vehicle seat mounting beam, the method comprising:
obtaining a first die for manufacturing an automobile seat mounting beam, wherein the first die is provided with a groove matched with the shape of the automobile seat mounting beam;
paving a region to be reinforced in the groove by using carbon fiber prepreg to form a reinforcing layer;
continuously using carbon fiber prepreg to lay the whole groove area in the groove with the reinforcing layer to form a body outer-shaped layer;
curing the laid first mold to obtain a preformed piece;
and carrying out secondary shaping on the preformed piece to obtain the automobile seat mounting cross beam.
2. The method of claim 1,
the region to be reinforced includes: a first mounting area, a second mounting area and a main bearing area;
the reinforcing layer includes: a first side reinforcement layer, a second side reinforcement layer and an intermediate reinforcement layer separated from each other, the first side reinforcement layer corresponding to the first installation area, the second side reinforcement layer corresponding to the second installation area, the intermediate reinforcement layer corresponding to the main load-bearing area.
3. The method of claim 2, wherein the reinforcement layer comprises a plurality of layers of carbon fiber prepreg, wherein the lay-up angles of the plurality of layers of carbon fiber prepreg are arranged alternately at 45 ° and-45 °.
4. The method of claim 1, wherein obtaining a first mold for making a vehicle seat mounting beam comprises:
cleaning the surface of the groove of the first die;
coating gel coat on the surface of the groove to form a gel coat layer;
and (3) coating a release agent on the gel coat layer.
5. The method of claim 4, wherein said post-sizing said preform comprises:
obtaining a second die, wherein the second die is provided with a bulge matched with the shape of the groove;
closing the first mold and the second mold to form a closed mold part;
and injecting resin into the cavity of the composite mold.
6. The method of claim 5, wherein after the injecting resin into the mold cavity of the co-mold member, the method further comprises: and heating the combined mould.
7. The method of claim 6, wherein after the heat treating the composite mold after injecting the resin, the method further comprises:
removing the first die and the second die to obtain a rough blank of the mounting beam of the automobile seat;
and finishing the rough blank of the automobile seat mounting beam.
8. A vehicle seat mounting beam, characterized in that it is manufactured by a method according to any one of claims 1-7.
9. An automobile, characterized in that the automobile comprises an automobile seat mounting cross member as claimed in claim 8.
10. The vehicle of claim 9, wherein the vehicle seat mounting cross member is adhesively attached to the vehicle body floor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011052809.0A CN112265290A (en) | 2020-09-29 | 2020-09-29 | Automobile seat mounting cross beam, manufacturing method thereof and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011052809.0A CN112265290A (en) | 2020-09-29 | 2020-09-29 | Automobile seat mounting cross beam, manufacturing method thereof and automobile |
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| CN112265290A true CN112265290A (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011052809.0A Pending CN112265290A (en) | 2020-09-29 | 2020-09-29 | Automobile seat mounting cross beam, manufacturing method thereof and automobile |
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| CN (1) | CN112265290A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816489A (en) * | 2015-04-21 | 2015-08-05 | 江阴优培德复合材料有限公司 | Manufacturing process of carbon fiber insert injection-molded composite product |
| CN109130238A (en) * | 2018-07-17 | 2019-01-04 | 奇瑞汽车股份有限公司 | The production method of floor crossmember afterwards |
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2020
- 2020-09-29 CN CN202011052809.0A patent/CN112265290A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816489A (en) * | 2015-04-21 | 2015-08-05 | 江阴优培德复合材料有限公司 | Manufacturing process of carbon fiber insert injection-molded composite product |
| CN109130238A (en) * | 2018-07-17 | 2019-01-04 | 奇瑞汽车股份有限公司 | The production method of floor crossmember afterwards |
Non-Patent Citations (1)
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| 郭金树等: "《复合材料件可制造性技术》", 30 June 2009, 航空工业出版社 * |
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