CN110626430A - Fire engine passenger room top sheet metal part reinforcing structure and manufacturing method thereof - Google Patents
Fire engine passenger room top sheet metal part reinforcing structure and manufacturing method thereof Download PDFInfo
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- CN110626430A CN110626430A CN201910810361.5A CN201910810361A CN110626430A CN 110626430 A CN110626430 A CN 110626430A CN 201910810361 A CN201910810361 A CN 201910810361A CN 110626430 A CN110626430 A CN 110626430A
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- 239000002184 metal Substances 0.000 title claims abstract description 83
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000005452 bending Methods 0.000 claims abstract description 57
- 238000005187 foaming Methods 0.000 claims abstract description 49
- 239000000945 filler Substances 0.000 claims abstract description 18
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 30
- 238000003466 welding Methods 0.000 claims description 29
- 239000004088 foaming agent Substances 0.000 claims description 14
- 239000000047 product Substances 0.000 claims description 9
- 238000005728 strengthening Methods 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 241000587161 Gomphocarpus Species 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 238000010923 batch production Methods 0.000 abstract description 5
- 239000007769 metal material Substances 0.000 description 8
- 238000012545 processing Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 229920000297 Rayon Polymers 0.000 description 3
- 238000003698 laser cutting Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C27/00—Fire-fighting land vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/06—Fixed roofs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention relates to the technical field of a reinforced structure of a sheet metal part of a fire fighting truck, in particular to a reinforced structure of a sheet metal part at the top of a passenger compartment of a fire fighting truck and a preparation method thereof, wherein the reinforced structure of the sheet metal part comprises a nail-shaped panel arranged at the top and a disc-shaped coaming plate arranged at the bottom, the disc-shaped coaming plate is connected with two ends of the nail-shaped panel to enclose a box-shaped closed space, a foaming filler is filled in the box-shaped closed space, the nail-shaped panel is a metal sheet, a plurality of connecting nails are welded on the inner surface of the nail-shaped panel, and connecting nail through holes are; the disc-shaped coaming is formed by bending a metal sheet, the two ends of the disc-shaped coaming are provided with bending parts which bend towards the inner side, and the bending angle of the bending parts is 135-150 degrees. The sheet metal part reinforcing structure is simple, the reinforcing purpose is achieved on strength and rigidity, the production process is greatly simplified, the cost is reduced, and the requirement of batch production is met.
Description
Technical Field
The invention relates to the technical field of a reinforced structure of a sheet metal part of a fire fighting truck, in particular to a reinforced structure of a sheet metal part on the top of a passenger compartment of the fire fighting truck and a preparation method thereof.
Background
The sheet metal part reinforcing technology is widely applied in daily production, but because the sheet metal part is limited by the structural characteristics of the sheet metal part, the single sheet metal part structure often has the condition of insufficient strength and rigidity in actual use. The conventional treatment method for solving the problems is as follows: on one hand, the use amount of the sheet metal part is simply increased (such as the thickness of the sheet metal part is increased), but the strength and the rigidity obtained by the method cannot meet the use requirements of actual products, and the problems of raw material cost rise, dead weight increase, complex structure, difficult production and processing and the like are directly caused; on the other hand, the strength and the rigidity are directly increased through the plastic deformation of the sheet metal part, but the sheet metal part needs to be processed and formed by large-scale hydraulic equipment, and sometimes even needs to be punched for multiple times to meet the design requirement, so that the problems of increased cost of processing equipment, difficulty in production and processing and high rejection rate are caused.
At present, the top of a passenger compartment of a fire engine is mainly formed by processing a sheet metal part, the conventional reinforcing technology is to bend the sheet metal part into a corrugated plate 10 (as shown in fig. 1), then the corrugated plate 10 is spliced to a required size in a welding mode, and then the panel 20 and the interior material 30 are respectively bonded on two sides of the corrugated plate 10 through an adhesive 40, namely, the sheet metal part is plastically deformed through a physical method to achieve the purpose of reinforcement. However, the mode and the structural design of the corrugated plate 10 bent piece which is firstly spliced and welded and then glued have the following problems in actual production:
(1) laser cutting equipment is required for blanking to ensure accurate positioning, so that tool setting in a subsequent re-bending process is facilitated, and the error probability of the bending process is reduced; (2) each plate is bent for 100 times, a passenger room with the conventional width generally needs 2 plates, and thus the bending needs 200 times in total (the top of the passenger room with a complex structure needs more corrugated plates), and each bending time of 1 is needed to be checked by 3 persons together and then to be cut, and if any one of the bending times is wrong, the power is abandoned; therefore, the scrap risk of the sheet metal part in the bending process is relatively high; (3) the bending times are too many, so that the labor intensity of workers is high, and the safety accident risk is also great; (4) because the finished product of the spliced and welded bent piece is connected with the panel in a viscose mode, the workpiece is pressed and positioned after being viscose, and the next procedure can be carried out for installation and use after waiting for 24 hours, the relative displacement operation is not allowed between the bonded workpieces during the period, otherwise, the bonding performance is influenced, and therefore, the pressing and positioning operation of the viscose procedure occupies a large-area production field during batch production; therefore, the existing sheet metal part reinforcing structure is complex, the usage amount of sheet metal materials is large, the product is heavy, the processing procedure is complex, the production period is long, the cost is high, the safety is insufficient, and the requirement of batch production cannot be met.
Disclosure of Invention
The invention aims to provide a reinforced structure of a sheet metal part at the top of a passenger compartment of a fire engine and a preparation method thereof, aiming at the defects in the prior art.
The reinforcing structure comprises a nail-shaped panel arranged at the top and a disc-shaped surrounding plate arranged at the bottom, wherein the disc-shaped surrounding plate is connected with two ends of the nail-shaped panel to form a box-shaped closed space, a foaming filler is filled in the box-shaped closed space, the nail-shaped panel is a metal sheet, a plurality of connecting nails are welded on the inner surface of the nail-shaped panel, and connecting nail through holes are formed in the positions, corresponding to the connecting nails, on the inner surface of the disc-shaped surrounding plate;
the dish form bounding wall is bent by sheet metal and is formed, just the both ends of dish form bounding wall have towards the inboard crooked portion of bending, the bending angle degree of the portion of bending is 135 ~ 150.
In the technical scheme, the disc-shaped coaming is welded and fixed with the two ends of the nail-shaped panel, and the thicknesses of the nail-shaped panel and the disc-shaped coaming are set to be 3-5 mm.
In the technical scheme, the connecting nails are perpendicular to the nail-shaped panel, and the number of the connecting nails is set to be 8-12.
In the technical scheme, the diameter of the connecting nail is set to be 6-10 mm.
In the technical scheme, the foaming filler is formed by foaming the foaming agent injected into the box-shaped closed space, and the thickness of the foaming filler is set to be 20-30 mm.
In the above technical scheme, the connection nail comprises a head part and a rod part which are connected, the head part is arranged in the connection nail through hole in a penetrating way, and the head part is welded with the connection nail through hole.
In the technical scheme, the circumferential direction of the gap at the welding position of the head part of the connecting nail and the through hole of the connecting nail forms a welding line bulge with a certain thickness.
The invention also provides a preparation method of the sheet metal part reinforcing structure on the top of the fire engine passenger room, which comprises the following steps:
a, performing plate shearing, blanking and corner cutting on a metal sheet according to the size to obtain a first metal sheet and a second metal sheet for later use;
step b, welding a plurality of connecting nails on the inner side surface of the first metal sheet to obtain a nail-shaped panel;
c, bending and molding two ends of the second metal sheet for multiple times to form a bending part with a certain bending angle, and punching connecting nail through holes corresponding to the connecting nails on the inner side surface of the second metal sheet to obtain a disc-shaped coaming plate;
d, splicing the nail-shaped panel and the disc-shaped coaming to ensure that the head of a connecting nail correspondingly penetrates through the connecting nail through hole, welding the outer side end of the bending part with the two ends of the nail-shaped panel respectively, welding the outer side surface of the disc-shaped coaming along the circumferential direction of the connecting nail head and the hole of the connecting nail through hole to form a welding seam bulge with a certain thickness, and obtaining a semi-finished product with a box-shaped closed space after the tailor-welding;
step e, respectively brushing adhesives in required amount on the inner side surfaces of the spliced and welded nail-shaped panel and the disc-shaped coaming, standing for a period of time, putting the semi-finished product into a lower die of a foaming tool, accurately positioning, then, covering a die box cover and locking, and enabling the box-shaped closed space to be a foaming cavity; and then injecting a foaming agent with required dosage into the foaming tool, stirring and mixing before injecting to ensure that the foaming agent is injected into the foaming cavity at a constant speed, sealing the injection opening after the foaming agent is injected, and unloading the mold and taking out the part after foaming for a period of time to obtain the finished product of the sheet metal part reinforcing structure.
In the above technical scheme, in the step c, the bending times are 8 times.
In the technical scheme, in the step e, the foaming time is 2h, and moderate vibration or tapping is applied to the hollow drum or the part with uneven heat generation in the foaming process.
The invention has the beneficial effects that:
the invention relates to a reinforcing structure for a sheet metal part at the top of a passenger compartment of a fire engine, which comprises a nail-shaped panel arranged at the top and a disc-shaped surrounding plate arranged at the bottom, wherein the disc-shaped surrounding plate is connected with two ends of the nail-shaped panel to form a box-shaped closed space; the disc-shaped coaming is formed by bending a metal sheet, the two ends of the disc-shaped coaming are provided with bending parts which bend towards the inner side, and the bending angle of the bending parts is 135-150 degrees. By adopting the reinforcing structure, the nail-shaped panel and the disc-shaped coaming are both made of metal sheets with certain thickness, wherein two ends of the disc-shaped coaming are formed by bending and punching and are welded and fixed with two ends of the nail-shaped panel, the bending angle is controlled to be 135-150 degrees, so that the design of the connection part of the top of a passenger room of a fire engine and each side surface can be matched, and the large bending angle is fully utilized to reduce the unexpected extension of a sheet metal material in the actual use process; on the other hand, the strength of the disc-shaped enclosing plate and the nail-shaped panel is further enhanced by matching the connecting nail with the connecting nail through hole, and then the foaming tool is utilized to inject foaming agent into the box-shaped closed space between the nail-shaped panel and the disc-shaped enclosing plate for foaming and forming, so that uniform foaming filler with certain density (the density can reach a plurality of times of the density of the free foaming part) is formed around the connecting nail, and the sheet metal material can simultaneously achieve the purpose of enhancement in strength and rigidity, thereby better meeting the requirement of the top structure of a fire engine passenger room. Compared with the prior art, the sheet metal part reinforcing structure and the preparation method thereof have the following advantages:
(1) the invention adopts a method of combining physics and chemistry, so that the sheet metal material can achieve the purpose of strengthening on the strength and rigidity at the same time, the strengthening structure of the sheet metal part is simpler, the finished product does not need to be welded and spliced, the integrity is stronger, the integral dead weight is reduced by 21%, and the advantage of light structure is obvious;
(2) the sheet metal part reinforcing structure greatly reduces the usage amount of metal plates, the thickness of the metal plates is thinner, meanwhile, the requirements of strength and rigidity reinforcement can still be met, the minimum thickness can reach 3mm or even below, and when the fire fighting truck adopts the corrugated plate reinforcing structure in the prior art, when the thickness of the plates is lower than 3mm, the phenomenon of insufficient strength and rigidity can begin to occur;
(3) the manufacturing process of the sheet metal part reinforcing structure is simpler, the blanking can be completed only by using a common plate shearing machine and a corner cutting tool, the required bending operation can be completed only by bending the whole disc-shaped coaming for 8 times, the foaming process only needs to be kept stand for 2 hours, and the next process can be carried out for installation and use, so that compared with the prior art which needs to wait for 24 hours after laser cutting blanking-bending for more than 200 times, welding and gluing, the production process is greatly simplified, the production period is shortened, the blanking process cost is reduced by 93 percent, the bending process cost is reduced by 97 percent, the tailor-welding cost between finished products is saved, the process waiting time is reduced by 91 percent, the occupied space of a manufacturing field is small, and the requirement of batch production is better met;
(4) the foam filler is arranged in the sheet metal part reinforcing structure, the average heat conductivity coefficient of the foam filler is small, energy exchange generated by heat convection and heat radiation is blocked, most of heat conduction is blocked directly, and the foam filler can generate obvious heat preservation and insulation effects when being applied to a passenger room of a fire engine.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic view of a prior art corrugated sheet reinforcing structure.
Fig. 2 is a schematic view of a reinforcing structure of a sheet metal part on the top of a passenger compartment of a fire fighting truck according to the embodiment.
Fig. 3 is a schematic view of another angle of the reinforcing structure of the sheet metal part on the top of the passenger compartment of the fire fighting truck according to the embodiment.
Fig. 4 is a schematic structural diagram of a nail-shaped panel of a reinforcement structure of a sheet metal part on the top of a passenger compartment of a fire fighting truck according to the embodiment.
Fig. 5 is a schematic structural view of a dished coaming of a fire engine passenger compartment roof sheet metal part reinforcing structure according to the embodiment.
Fig. 6 is an enlarged schematic view of a portion a in fig. 2.
Fig. 7 is an enlarged schematic view of the structure at B in fig. 5.
Reference numerals:
a nail-shaped panel 1, a connecting nail 11;
the connecting nail comprises a disc-shaped coaming 2, a connecting nail through hole 21 and a bending part 22;
foaming filler 3 and welding line bulge 4;
a bending angle β;
corrugated board 10, adhesive panel 20, interior material 30, adhesive 40.
Detailed Description
The invention is further described with reference to the following examples and the accompanying drawings.
The utility model provides a fire engine passenger room top sheet metal component additional strengthening of embodiment, as shown in fig. 2 and 3, including setting up in the nail form panel 1 at top and setting up in the dish form bounding wall 2 of bottom, dish form bounding wall 2 is connected in order to enclose box-shaped enclosure with the both ends of nail form panel 1, and the box-shaped enclosure intussuseption is filled with foaming filler 3. As shown in fig. 3, the nail-shaped panel 1 is a metal thin plate, and a plurality of connecting nails 11 are welded on the inner surface thereof; as shown in fig. 4, a connecting nail through hole 21 is formed on the inner surface of the disc-shaped surrounding plate 2 corresponding to the connecting nail 11, the disc-shaped surrounding plate 2 is formed by bending a metal sheet, bending portions 22 bending toward the inner side are formed at both ends of the disc-shaped surrounding plate 2, and a bending angle β of each bending portion 22 is 135-150 ° (see fig. 6). By adopting the reinforcing structure, the nail-shaped panel 1 and the disc-shaped coaming 2 are both made of metal sheets with certain thickness, wherein two ends of the disc-shaped coaming 2 are formed by bending and punching and are welded and fixed with two ends of the nail-shaped panel 1, the bending angle beta is controlled to be 135-150 degrees, so that the design of the connection part of the top of a passenger room of a fire engine and each side surface can be matched, and the large bending angle is fully utilized to reduce the unexpected extension of a sheet metal material in the actual use process; on the other hand, the matching of the connecting nail 11 and the connecting nail through hole 21 is utilized to further strengthen the strength of the disc-shaped coaming 2 and the nail-shaped panel 1, and then a foaming tool is utilized to inject foaming agent into the box-shaped closed space between the nail-shaped coaming 1 and the disc-shaped coaming 2 for foaming and forming, so that uniform foaming filler 3 with certain density (the density can reach a plurality of times of the density of a free foaming part) is formed around the connecting nail 11, and therefore the sheet metal material can simultaneously achieve the purpose of strengthening in strength and rigidity, and better meet the requirement of the top structure of a passenger room of a fire engine.
Specifically, the disc-shaped coaming 2 is welded and fixed with two ends of the nail-shaped panel 1. The thickness of the nail-shaped panel 1 and the disc-shaped coaming 2 is set to be 3-5 mm.
Specifically, connect nail 11 perpendicular to nail form panel 1, the number of connecting nail 11 sets up to 8 ~ 12, and the diameter of connecting nail 11 sets up to 6 ~ 10 mm. The welding of the connecting nail 11 needs to ensure accurate positioning and verticality so as to facilitate the subsequent combination operation with the disc-shaped coaming 2. The connecting nail 11 comprises a head part and a rod part which are connected, the head part is arranged in the connecting nail through hole 21 in a penetrating mode, and the head part is welded with the connecting nail through hole 21. In a preferred embodiment, the gap at the welding position of the head of the connecting nail 11 and the connecting nail through hole 21 is formed with a welding bead bulge 4 with a certain thickness in the circumferential direction (see fig. 5). Utilize the cooperation of connecting nail 11 and connecting nail perforation 21, further strengthen the intensity of disk form bounding wall 2 and nail form panel 1, reuse the foaming frock, pour into the foamer in the box-like enclosure space between nail form panel 1 and disk form bounding wall 2 and carry out the foaming shaping, thereby form the even foaming filler 3 that has certain density (this density can reach a plurality of times of "freely foam" density) around the aforesaid connecting nail 11, thereby make the sheet metal material reach the purpose of strengthening on intensity and rigidity simultaneously, satisfy the requirement of fire engine passenger room top structure better.
Specifically, the foaming filler 3 is formed by foaming a foaming agent injected into a box-shaped closed space, and the thickness of the foaming filler 3 is set to be 20-30 mm.
The optimal plate thickness, the thickness of the foaming filler 3, the number and the diameter of the connecting nails 11, the arrangement rule of the connecting nails and the welding mode of the nail-shaped panel 1 and the disc-shaped coaming 2 are obtained by a great amount of experiments of the inventor, the requirements on the strength and the rigidity of the top of a fire engine passenger room need to be met by the national standard GB7956, namely when the top of the fire engine passenger room needs to be operated by people or maintained by equipment, the static load with the mass of 100kg can be borne within the range of 300mm multiplied by 200mm, the load is removed after 5min, and the top of the fire engine passenger room does not have structural damage or visible permanent deformation. Finally, the purpose of strengthening the sheet metal material on the strength and the rigidity is achieved at the same time, and the requirement of the top structure of the passenger room of the fire engine is met.
The preparation method of the sheet metal part reinforcing structure at the top of the passenger compartment of the fire engine comprises the following steps:
a, performing plate shearing, blanking and corner cutting on a metal sheet according to the size to obtain a first metal sheet and a second metal sheet for later use;
step b, welding a plurality of connecting nails 11 on the inner side surface of the first metal sheet to obtain a nail-shaped panel 1;
c, bending and molding two ends of the second metal sheet for multiple times to form a bending part 22 with a certain bending angle, and punching a connecting nail through hole 21 corresponding to the connecting nail 11 on the inner side surface of the second metal sheet to obtain a disc-shaped coaming plate 2;
d, splicing the nail-shaped panel 1 and the disc-shaped coaming 2 to enable the head of the connecting nail 11 to correspondingly penetrate through the connecting nail through hole 21, respectively welding the outer side end of the bending part 22 with the two ends of the nail-shaped panel 1, then circumferentially welding the head of the connecting nail 11 and the hole of the connecting nail through hole 21 on the outer side surface of the disc-shaped coaming 2 along the hole of the connecting nail through hole 21 to form a welding seam bulge with a certain thickness, and obtaining a semi-finished product with a box-shaped closed space after welding;
step e, respectively brushing adhesives with required dosage on the inner side surfaces of the spliced and welded nail-shaped panel 1 and the disc-shaped coaming 2, standing for a period of time, putting the semi-finished product into a lower die of a foaming tool, accurately positioning, and locking an upper die box cover, wherein the box-shaped closed space becomes a foaming cavity; and then injecting a foaming agent with required dosage into the foaming tool, stirring and mixing before injecting to ensure that the foaming agent is injected into the foaming cavity at a constant speed, sealing the injection opening after the foaming agent is injected, and unloading the mold and taking out the part after foaming for a period of time to obtain the finished product of the sheet metal part reinforcing structure.
Specifically, in step c, the number of bending times is 8.
Specifically, in the step e, the foaming time is 2h, and moderate vibration or tapping is applied to the hollow drum or the part with uneven heat generation in the foaming process.
Test example: comparing the sheet metal part reinforcing structure of this embodiment with the "corrugated plate" reinforcing structure and the process thereof of the prior art, the results are shown in table 1:
TABLE 1 comparison of the procedures for the sheet metal part reinforcing structure of this example with the corrugated plate reinforcing structure
As can be seen from Table 1, the sheet metal part reinforcing structure of the embodiment has the advantages that each process in the production and manufacturing process is obviously superior to the existing corrugated plate reinforcing structure, the whole manufacturing process is simpler, the blanking can be completed only by using a common plate shearing machine and a corner cutting tool, the required bending operation can be completed only by bending the whole disc-shaped coaming 2 for 8 times, the foaming process only needs to be kept still for 2 hours, and the next process can be installed and used, so compared with the prior art which needs to wait for 24 hours after laser cutting blanking-bending for 200 times, welding and gluing, the sheet metal part reinforcing structure greatly simplifies the production process, shortens the production period, reduces the blanking process cost by 93 percent, reduces the bending process cost by 97 percent, saves the tailor welding cost among finished products, reduces the process waiting time by 91 percent, and occupies small space in the manufacturing field, the requirement of batch production is better met.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a fire engine passenger room top sheet metal component additional strengthening which characterized in that: the nail-shaped enclosing plate is connected with two ends of the nail-shaped panel to enclose a box-shaped closed space, foaming fillers are filled in the box-shaped closed space, the nail-shaped panel is a metal thin plate, a plurality of connecting nails are welded on the inner surface of the nail-shaped panel, and connecting nail through holes are formed in the positions, corresponding to the connecting nails, on the inner surface of the disc-shaped enclosing plate;
the dish form bounding wall is bent by sheet metal and is formed, just the both ends of dish form bounding wall have towards the inboard crooked portion of bending, the bending angle degree of the portion of bending is 135 ~ 150.
2. The fire engine passenger compartment roof sheet metal part reinforcing structure of claim 1, wherein: the dish form bounding wall with the both ends welded fastening of nail form panel, nail form panel and dish form bounding wall thickness set up to 3 ~ 5 mm.
3. The fire engine passenger compartment roof sheet metal part reinforcing structure of claim 1, wherein: the connecting nails are perpendicular to the nail-shaped panel, and the number of the connecting nails is set to be 8-12.
4. The fire engine passenger compartment roof sheet metal part reinforcing structure of claim 3, wherein: the diameter of the connecting nail is set to be 6-10 mm.
5. The fire engine passenger compartment roof sheet metal part reinforcing structure of claim 1, wherein: the foaming filler is formed by foaming of a foaming agent injected into the box-shaped closed space, and the thickness of the foaming filler is set to be 20-30 mm.
6. The fire engine passenger compartment roof sheet metal part reinforcing structure of claim 1, wherein: the connecting nail comprises a head part and a rod part which are connected, the head part is arranged in the connecting nail through hole in a penetrating mode, and the head part is welded with the connecting nail through hole.
7. The fire engine passenger compartment roof sheet metal part reinforcing structure of claim 6, wherein: and a welding seam bulge with a certain thickness is formed on the circumferential direction of a pore at the welding position of the head part of the connecting nail and the through hole of the connecting nail.
8. A preparation method of a sheet metal part reinforcing structure on the top of a fire engine passenger room is characterized by comprising the following steps of: the method comprises the following steps:
a, performing plate shearing, blanking and corner cutting on a metal sheet according to the size to obtain a first metal sheet and a second metal sheet for later use;
step b, welding a plurality of connecting nails on the inner side surface of the first metal sheet to obtain a nail-shaped panel;
c, bending and molding two ends of the second metal sheet for multiple times to form a bending part with a certain bending angle, and punching connecting nail through holes corresponding to the connecting nails on the inner side surface of the second metal sheet to obtain a disc-shaped coaming plate;
d, splicing the nail-shaped panel and the disc-shaped coaming to ensure that the head of a connecting nail correspondingly penetrates through the connecting nail through hole, welding the outer side end of the bending part with the two ends of the nail-shaped panel respectively, welding the outer side surface of the disc-shaped coaming along the circumferential direction of the connecting nail head and the hole of the connecting nail through hole to form a welding seam bulge with a certain thickness, and obtaining a semi-finished product with a box-shaped closed space after the tailor-welding;
step e, respectively brushing adhesives in required amount on the inner side surfaces of the spliced and welded nail-shaped panel and the disc-shaped coaming, standing for a period of time, putting the semi-finished product into a lower die of a foaming tool, accurately positioning, then, covering a die box cover and locking, and enabling the box-shaped closed space to be a foaming cavity; and then injecting a foaming agent with required dosage into the foaming tool, stirring and mixing before injecting to ensure that the foaming agent is injected into the foaming cavity at a constant speed, sealing the injection opening after the foaming agent is injected, and unloading the mold and taking out the part after foaming for a period of time to obtain the finished product of the sheet metal part reinforcing structure.
9. The method for manufacturing the sheet metal part reinforcing structure on the top of the fire engine passenger compartment as claimed in claim 8, wherein: in the step c, the bending times are 8 times.
10. The method for manufacturing the sheet metal part reinforcing structure on the top of the fire engine passenger compartment as claimed in claim 8, wherein: in the step e, the foaming time is 2h, and moderate vibration or tapping is applied to the hollow drum or the part with uneven heating in the foaming process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910810361.5A CN110626430A (en) | 2019-08-29 | 2019-08-29 | Fire engine passenger room top sheet metal part reinforcing structure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910810361.5A CN110626430A (en) | 2019-08-29 | 2019-08-29 | Fire engine passenger room top sheet metal part reinforcing structure and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110626430A true CN110626430A (en) | 2019-12-31 |
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| CN201910810361.5A Pending CN110626430A (en) | 2019-08-29 | 2019-08-29 | Fire engine passenger room top sheet metal part reinforcing structure and manufacturing method thereof |
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| CN210822474U (en) * | 2019-08-29 | 2020-06-23 | 广东永强奥林宝国际消防汽车有限公司 | Fire engine passenger room top sheet metal component additional strengthening |
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| JPH08199728A (en) * | 1995-01-25 | 1996-08-06 | Nitto Kogyo Kk | Composite panel material |
| KR19980052806A (en) * | 1996-12-24 | 1998-09-25 | 박병재 | Roof panel structure of car |
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| CN201970503U (en) * | 2010-12-30 | 2011-09-14 | 顾玉智 | Composite plastic automobile ceiling |
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| CN108657286A (en) * | 2017-03-29 | 2018-10-16 | 福特环球技术公司 | Roof roof module in the car |
| CN210822474U (en) * | 2019-08-29 | 2020-06-23 | 广东永强奥林宝国际消防汽车有限公司 | Fire engine passenger room top sheet metal component additional strengthening |
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