CN115431009B - Automobile half door ring processing method and mold - Google Patents
Automobile half door ring processing method and mold Download PDFInfo
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- CN115431009B CN115431009B CN202211262492.2A CN202211262492A CN115431009B CN 115431009 B CN115431009 B CN 115431009B CN 202211262492 A CN202211262492 A CN 202211262492A CN 115431009 B CN115431009 B CN 115431009B
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- 238000003672 processing method Methods 0.000 title claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 239000002699 waste material Substances 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims 5
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 13
- 230000006872 improvement Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 4
- 238000004080 punching Methods 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
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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
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
Abstract
The application relates to the field of new energy automobile manufacturing, and discloses an automobile half door ring processing method and a mold; the method comprises the following steps: s1, blanking is carried out on plates with different thicknesses and different materials to obtain a blanking sheet A, a blanking sheet B and a blanking sheet B of the lower half section of the column A; s2, carrying out laser splice welding on the blanking piece of the A column, the blanking piece of the upper edge beam, the blanking piece of the B column, the blanking piece of the lower half section of the B column and the blanking piece of the lower half section of the A column to obtain a half door ring blanking piece; s3, connecting the lower half section of the column A and the lower half section of the column B of the half door ring blanking piece by using a connecting piece to obtain a pseudo door ring blank; s4, heating the pseudo door ring blank, and sending the heated pseudo door ring blank into a hot stamping device for hot stamping after the pseudo door ring blank is heated to a certain temperature; s5, cutting the pseudo door ring blank subjected to hot stamping to obtain the complete half door ring. The half door ring produced by the method is beneficial to lighter weight of the automobile on the premise of ensuring the strength of the new energy automobile.
Description
Technical Field
The application relates to the field of manufacturing of new energy automobiles, in particular to an automobile half door ring processing method and a mold.
Background
The automobile door ring is a part of an automobile body and mainly comprises an A column assembly, a B column assembly and a threshold, wherein the automobile door ring plays a key role in protecting the safety of drivers and passengers in an automobile when the automobile is impacted, especially in small offset collision and side collision. The traditional door ring manufacturing method adopts a split type production and manufacturing scheme that door ring parts are singly hot stamped and then spliced; with the development of new energy automobiles, automobile manufacturers have higher and higher requirements for light weight.
The integrated door ring manufacturing method also comprises a front door ring of an automobile and a manufacturing method thereof, wherein the front door ring comprises an A column lower section, an A column upper section, a B column middle section and a B column lower section, the A column lower section is connected with the A column upper section in a splice welding mode, the A column upper section is connected with the B column upper section in a splice welding mode, the B column upper section is connected with the B column middle section in a splice welding mode, and the B column middle section is connected with the B column lower section in a splice welding mode; the lower section of the column A and the lower section of the column B are both overlapped with the threshold; however, as the door opening and the doorsill are manufactured separately, and then are lapped; there is overlap joint portion, and degree of lightweight is not enough, and probably has heating and punching press deformation great when carrying out door opening part punching press, is unfavorable for mass production's uniformity.
Disclosure of Invention
The application aims to provide a processing method and a die for an automobile half door ring, so that the lightweight automobile door ring can be produced in batches.
In order to achieve the above purpose, the application adopts the following technical scheme: the automobile door ring processing method comprises the following steps:
s1, blanking is carried out on plates with different thicknesses and different materials to obtain blanking sheets of an A column, an upper boundary beam, a B column, a lower half section of the B column and a lower half section of the A column;
s2, carrying out laser splice welding on the blanking piece of the A column, the blanking piece of the upper edge beam, the blanking piece of the B column, the blanking piece of the lower half section of the B column and the blanking piece of the lower half section of the A column to obtain a half door ring blanking piece;
s3, connecting the lower half section of the column A and the lower half section of the column B of the half door ring blanking piece by using a connecting piece to obtain a pseudo door ring blank;
s4, heating the pseudo door ring blank, and sending the heated pseudo door ring blank into a hot stamping device for hot stamping after the pseudo door ring blank is heated to a certain temperature;
s5, cutting the pseudo door ring blank subjected to hot stamping to obtain the complete half door ring.
The principle and the advantages of the scheme are as follows: when the blanking is carried out, plates with different thicknesses and different materials are selected for carrying out blanking at different positions of the door ring, wherein an auxiliary area is blanked when blanking the blanking piece at the lower half section of the B column and blanking piece at the lower half section of the A column, and each part is splice welded into a half door ring blanking piece by adopting laser splice welding after the blanking is finished; then connecting the two auxiliary areas of the spliced and welded half door ring blanking piece by adopting a connecting piece; then the connected half door ring blanking pieces are sent to a heating furnace for heating, and are transported to a hot stamping device for hot stamping after being heated, and finally trimming is carried out to obtain the complete half door ring;
in practical application, the half door ring is adopted, so that the door threshold position is canceled, no lap joint exists, and the produced door ring is lighter; the plates with different thicknesses and different materials are adopted for blanking, and each part of the half door ring further realizes light weight on the basis of meeting the strength requirement after the hot stamping is finished; in the inherent concept, the production mode of the half door ring is not suitable for large-scale processing production, wherein the most important is that when hot stamping is performed, the half door ring blanking piece subjected to splice welding is heated and pressed to generate deformation, and the deformation is not beneficial to the consistency of the produced door ring, so that the assembly precision of the produced door ring is affected;
in the application, the lower half section of the B column of the half door ring blanking piece is connected with the lower half section blanking piece of the A column by a connecting piece to form a pseudo door ring; when the semi-portal ring blank is used, the connecting piece has a binding effect on the semi-portal ring blank, and the large uncontrollable deformation of the semi-portal ring die is avoided when the semi-portal ring blank is heated and pressed, so that the semi-portal ring blank is suitable for large-scale semi-portal ring production, and the produced semi-portal ring has consistency; finally, the weight of the door ring is reduced.
As an improvement, when blanking is carried out in the step S1, the obtained blanking pieces of the lower half section of the A column and the blanking pieces of the lower half section of the B column comprise auxiliary areas, and the auxiliary areas are used for auxiliary connection of the blanking pieces of the lower half section of the A column and the blanking pieces of the lower half section of the B column;
the effects are as follows: the auxiliary area is directly blanked out during blanking, so that the connecting piece is connected into a pseudo door ring in a spot welding mode, and the reserved auxiliary area avoids affecting the manufacturing of the door ring.
As an improvement, the material of the connecting piece in the step S3 is waste steel plate or waste material;
the effects are as follows: the connecting piece adopts waste materials to manufacture, so that the utilization rate of the materials is improved, and the environment is protected.
As an improvement, in the step S1, when blanking is performed on the lower half section of the a column and the lower half section of the B column, the auxiliary area and blanking piece blanking are completed at one time; the auxiliary area comprises a spot welding area, the length of the spot welding area is 26-30mm, and the spot welding area is used for spot welding the connecting piece;
the effects are as follows: the length of the spot welding area is set to be 26-30mm, and the length is the optimal length of spot welding of the connecting piece, so that the connecting piece can conveniently connect the blanking piece at the lower half section of the A column with the blanking piece at the lower half section of the B column; and this length does not affect the utilization of the board.
As an improvement, the spot welding area and the connecting piece are provided with corresponding positioning holes, and the diameter of each positioning hole is 5-7mm; the positioning holes are used for connecting and positioning the spot welding area and the connecting piece when the half door ring of the automobile is processed through the pins.
The effects are as follows: the locating holes arranged in the spot welding area are beneficial to locating the connecting piece during spot welding, so that consistency of the pseudo door ring is guaranteed, consistency of the produced pseudo door ring is guaranteed, mass production of the door ring is facilitated, and the connecting piece is further guaranteed to be consistent through pin connection and locating.
As an improvement, the thicknesses of the blanking pieces of the column A, the blanking pieces of the upper edge beam, the blanking pieces of the column B, the blanking pieces of the lower half section of the column B and the blanking pieces of the column A in the step S1 are all 1.2mm-1.6mm.
The effects are as follows: for different vehicle types and different technical requirements, each part of the door ring is blanked by plates with different thicknesses, and then is punched and strengthened, so that the strength requirement can be met, and meanwhile, the light weight is realized, wherein the thickness of the material sheet is 1.2-1.6mm, and the method can meet the different strength requirements and can realize the optimal thickness of the light weight.
As an improvement, the waste material area and the connecting piece are provided with corresponding positioning holes;
the effects are as follows: when carrying out the connecting piece welding, align the locating hole, make things convenient for the welding of connecting piece, and can guarantee connecting piece position uniformity.
As an improvement, the pseudo door ring blank in the step S4 is heated by adopting a roller hearth type heating furnace, wherein the roller hearth type heating furnace is provided with 7-9 heating areas, the temperature of each heating area is 810-950 ℃, and the heating time is 6-8min;
the effects are as follows: adopt roller hearth heating furnace to heat, the temperature is stable, and heating efficiency is high, can also guarantee simultaneously that the tablet is heated evenly, and wherein temperature subregion sets up with the heating time so set up, is favorable to the blanking piece of different thickness and different materials to fully austenitize.
As an improvement, when hot stamping is performed in the step S4, the temperature of the pseudo door ring blank is more than or equal to 730 ℃;
the effect is that when the pseudo door ring blank is hot stamped, the temperature is higher than 730 ℃, and when the pseudo door ring blank is hot stamped, heat is rapidly led out under the action of a hot stamping device, so that the temperature of the blank is rapidly reduced, and the door ring blank is transformed from austenite to a martensite structure, namely, the door ring blank is fully hardened.
The application also provides a mold for processing the half door ring of the automobile, and the mold is adopted to process the half door ring in the processing method.
Drawings
Fig. 1 is a flowchart of a method for processing an automobile door ring according to an embodiment of the application.
Fig. 2 is a schematic structural view of an automotive false door ring blank according to an embodiment of the present application.
Fig. 3 is a schematic view of an automobile door ring according to an embodiment of the application.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in fig. 1 of the specification include: a post blanking piece 1, upper boundary beam blanking piece 2, B post blanking piece 3, B post lower half blanking piece 4, A post lower half blanking piece 5, connecting piece 6.
The half door ring of the automobile is similar to a conventional door ring, but compared with the conventional door ring, the half door ring of the automobile cancels a threshold assembly, so that the half door ring is U-shaped, and is more beneficial to light weight.
An example is substantially as shown in figure 1:
the method for processing the half door ring of the automobile specifically comprises the following steps:
s1, blanking is carried out on a plate to obtain blanking sheets of an A column, an upper boundary beam, a B column, a lower half section of the B column and a lower half section of the A column; in implementation, an auxiliary area is also blanked when blanking is carried out on the lower half section of the B column and the lower half section of the A column, and the auxiliary area is used for constructing a pseudo door ring; in the implementation, in order to meet the strength requirement after stamping, the thickness of each blanking piece is preferably 1.2-1.6mm; in the embodiment, the A column adopts CR950/2000HS hot-formed steel, the thickness of the material is 1.6mm, the upper edge beam and the B column adopt CR950/1300HS hot-formed steel, the thickness of the material is 1.6mm, the lower half section of the B adopts CR350/550HS hot-formed steel, the thickness of the material is 1.6mm, the lower half section of the A column adopts CR780/980HS hot-formed steel, and the thickness of the material is 1.2mm;
s2, as shown in figure 2, carrying out laser splice welding on the blanking piece 1 of the A column, the blanking piece 2 of the upper edge beam, the blanking piece 3 of the B column, the blanking piece 4 of the lower half section of the B column and the blanking piece 5 of the lower half section of the A column to obtain a half door ring blanking piece;
step S3, as shown in figure 2, connecting the lower half section 5 of the column A and the lower half section 4 of the column B of the half door ring blanking piece by using a connecting piece 6 to obtain a pseudo door ring blank; when the spot welding device is implemented, the auxiliary areas at the end parts of the blanking piece at the lower half section of the column A and the blanking piece at the lower end of the column B are used for spot welding connecting pieces; in implementation, the connecting piece 6 is a waste steel plate, and the waste steel plate can be made of waste materials during blanking, so that the utilization rate of materials is increased; at present, almost all waste materials during blanking are recycled and melted and then formed, so that the overall cost is high; the application directly recycles the waste steel plates and is used as a conventional tool, thereby improving the utilization rate of materials.
In the implementation process, in the step S3, part of an auxiliary area formed by blanking is used as a spot welding area, and the spot welding area is used for spot welding a connecting piece 6 to realize connection and fixation of a blanking piece at the lower half section of the column A and a blanking piece at the lower half section of the column B; after the spot welding of the connecting piece is finished, a pseudo door ring blank is formed; the spot-welded connecting piece plays roles of binding and connecting and fixing, and when the spot-welded connecting piece is used, the degree of thermal deformation of the pseudo door ring blank in a heating furnace is greatly reduced due to the existence of the connecting piece, and the consistency during stamping is well ensured; in the concrete implementation, the thickness of the connecting piece is larger than that of the blanking piece, so that the connecting piece has better connecting and fixing effects;
in implementation, the length of the spot welding area is preferably 26-30mm, and the spot welding area of 28mm in the embodiment is convenient for welding the connecting piece on one hand, provides sufficient welding spots for the connecting piece, is convenient for welding the connecting piece, and simultaneously saves the consumption of plates;
when in implementation, the spot welding area of the plate and the connecting piece are provided with corresponding positioning holes, namely the spot welding area is provided with positioning holes consistent with the positioning holes of the connecting piece, and positioning is convenient during spot welding through the positioning holes, so that the consistency of the production of the pseudo door ring blank is ensured; in the implementation process, the positioning holes can be fixed by pins, so that the installation and the fixation are convenient; wherein the diameter of the positioning hole is preferably 5-7mm, and in the implementation, 6mm.
S4, heating the pseudo door ring blank, and sending the heated pseudo door ring blank into a hot stamping device for hot stamping after the pseudo door ring blank is heated to a certain temperature; the pseudo door ring blank is heated by adopting a roller hearth type heating furnace, in the embodiment, the roller hearth type heating furnace is sequentially divided into nine heating areas, wherein the temperature of the nine heating areas is sequentially controlled to be 830/+ -20 ℃, 850/+ -20 ℃, 870/+ -20 ℃, 890/+ -20 ℃, 910/+ -20 ℃, 930/+ -20 ℃, 830/+ -20 ℃, and 830/+ -20 ℃; the adopted temperature gradient type heating mode is beneficial to fully austenitizing blanking sheets with different materials and different thicknesses, and when the method is implemented, the heating time of the pseudo door ring blank in a heating furnace is 6-8min, and in the embodiment, 400 seconds;
after the pseudo door ring blank is fully austenitized, transferring the pseudo door ring blank into a die in a hot stamping device for hot stamping, wherein the temperature of the pseudo half door ring blank is required to be ensured to be higher than 730 ℃ during hot stamping, and the pseudo half door ring blank is stamped for one time, and after stamping forming, the die is closed and pressure maintained, and at the moment, the pressure maintaining effect of the die is to prevent the non-uniformity of expansion and contraction in the pressure maintaining process, so that the part is greatly changed in shape and size and scrapped; during pressure maintaining, the pseudo door ring blank is cooled and quenched rapidly by the aid of multistage waterway circulation arranged in the die cavity, the blank material is converted from austenite to martensite, and strength is improved; when the method is implemented, the punching force is 950-1000 tons, the pressure maintaining force is 1000 tons, the pressure maintaining time is set to 20 seconds, and the temperature of the blank after the pressure maintaining is completed is lower than 200 ℃; after hot stamping, the tensile strength of the A column and the upper edge beam reaches 2Gpa, the tensile strength of the lower end of the B column and the lower half section of the B column exceeds 1000Mpa, and the lower half section of the A column exceeds 900Mpa.
S5, as shown in figure 3, cutting the pseudo door ring blank subjected to hot stamping to obtain a complete half door ring; after the hot stamping is finished, the auxiliary area and the redundant part are cut and shaped in a laser cutting mode, and the complete half door ring is obtained.
The application also provides a mold for processing the half door ring of the automobile, and the mold is adopted in the processing method for processing the half door ring.
It is worth to say that in the inherent concept, the fewer and the better the redundant parts are after stamping, and the closer and the better the blanking positions are on the plate, so that the full utilization of materials can be ensured; however, in practice, gaps between blanking sheets exist, and the plate cannot be fully utilized in an idealized way, and in the application, a part of the gaps are blanked into an auxiliary area during blanking, so that the utilization rate of the plate gap space is improved through the arrangement of the auxiliary area; the arrangement of the auxiliary area and the connecting piece can well ensure that the blanking piece of the half door ring does not deform greatly during stamping, so that the produced half door ring has more consistency and is beneficial to batch production; meanwhile, the connecting piece is made of waste materials after the plates are blanked, and the waste materials can be recycled, so that the utilization rate of materials is greatly improved, and the environment is protected.
Therefore, the connecting piece connects the lower half section of the B column of the half door ring blanking piece with the lower half section of the A column to form a pseudo door ring; when the semi-portal ring blank is used, the connecting piece has a binding effect on the semi-portal ring blank, so that the semi-portal ring blank and the die are prevented from generating larger uncontrollable deformation when being heated and pressed, the semi-portal ring blank is further suitable for large-scale semi-portal ring production, and the produced semi-portal ring has consistency; finally, the door ring is light and meets the strength requirement; and the utilization rate of materials is improved through the arrangement of the connecting piece and the auxiliary area.
The foregoing is merely exemplary of the present application, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present application, and these should also be regarded as the protection scope of the present application, which does not affect the effect of the implementation of the present application and the practical applicability of the patent. The protection scope of the present application is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (8)
1. The processing method of the automobile half door ring is characterized by comprising the following steps of:
s1, blanking is carried out on plates with different thicknesses and different materials to obtain a blanking sheet A, a blanking sheet B and a blanking sheet B of the lower half section of the column A;
s2, carrying out laser splice welding on the blanking piece of the A column, the blanking piece of the upper edge beam, the blanking piece of the B column, the blanking piece of the lower half section of the B column and the blanking piece of the lower half section of the A column to obtain a half door ring blanking piece;
s3, connecting the lower half section of the column A and the lower half section of the column B of the half door ring blanking piece by using a connecting piece to obtain a pseudo door ring blank;
s4, heating the pseudo door ring blank, and sending the heated pseudo door ring blank into a hot stamping device for hot stamping after the pseudo door ring blank is heated to a certain temperature;
s5, cutting the pseudo door ring blank subjected to hot stamping to obtain a complete half door ring;
and when blanking is performed in the step S1, the obtained blanking pieces of the lower half section of the A column and the blanking pieces of the lower half section of the B column comprise auxiliary areas, and the auxiliary areas are used for auxiliary connection of the blanking pieces of the lower half section of the A column and the blanking pieces of the lower half section of the B column.
2. The method for machining a half door ring of an automobile according to claim 1, wherein: in step S3, the material of the connecting member is waste steel plate.
3. The method for machining a half door ring of an automobile according to claim 2, wherein: in the step S1, when blanking is carried out on the lower half section of the column A and the lower half section of the column B, the auxiliary area and blanking sheets are finished at one time; the auxiliary area comprises a spot welding area, and the length of the spot welding area is 26-30mm and is used for spot welding the connecting piece.
4. A method of automotive half door ring tooling as claimed in claim 3 wherein: corresponding locating holes are formed in the spot welding area and the connecting piece, the diameter of each locating hole is 5-7mm, and the locating holes are used for connecting and locating the spot welding area and the connecting piece when the half door ring of the automobile is processed through pins.
5. The method for machining a half door ring of an automobile according to claim 1, wherein: the thicknesses of the blanking pieces of the column A, the blanking pieces of the upper edge beam, the blanking pieces of the column B, the blanking pieces of the lower half section of the column B and the blanking pieces of the lower half section of the column A in the step S1 are all 1.2mm-1.6mm.
6. The method for machining a half door ring of an automobile according to claim 1, wherein: in the step S4, the pseudo door ring blank is heated by adopting a roller hearth type heating furnace, 7-9 heating areas are arranged on the roller hearth type heating furnace, the temperature of each heating area is 810-950 ℃, and the heating time is 6-8min.
7. The method for machining a half door ring of an automobile according to claim 1, wherein: and (3) when hot stamping is performed in the step S4, the temperature of the pseudo door ring blank is more than or equal to 730 ℃.
8. A mould for half door ring processing of car, its characterized in that: a half door ring for use in the automotive half door ring processing method of any one of claims 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211262492.2A CN115431009B (en) | 2022-10-14 | 2022-10-14 | Automobile half door ring processing method and mold |
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| CN202211262492.2A CN115431009B (en) | 2022-10-14 | 2022-10-14 | Automobile half door ring processing method and mold |
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| CN115431009B true CN115431009B (en) | 2023-12-05 |
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