CN115431009A - Method and die for processing automobile half door ring - Google Patents
Method and die for processing automobile half door ring Download PDFInfo
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- CN115431009A CN115431009A CN202211262492.2A CN202211262492A CN115431009A CN 115431009 A CN115431009 A CN 115431009A CN 202211262492 A CN202211262492 A CN 202211262492A CN 115431009 A CN115431009 A CN 115431009A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000003672 processing method Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 239000002699 waste material Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims 5
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 14
- 230000002349 favourable effect Effects 0.000 description 4
- 238000010923 batch production Methods 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental 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
- 238000003825 pressing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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 invention 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 column A blanking piece, an upper edge beam blanking piece, a column B lower half section blanking piece and a column A lower half section blanking piece; s2, performing laser tailor-welding on the column A blanking piece, the upper edge beam blanking piece, the column B lower half-section blanking piece and the column A lower half-section blanking piece 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 semi-gate ring blanking sheet by using a connecting piece to obtain a pseudo-gate ring blank; s4, heating the pseudo door ring blank to a certain temperature, and then sending the heated pseudo door ring blank into a hot stamping device for hot stamping; and S5, cutting the pseudo door ring blank subjected to hot stamping to obtain a complete half door ring. The half door ring produced by the method is beneficial to ensuring the strength of the new energy automobile and ensuring the lighter weight of the automobile.
Description
Technical Field
The invention relates to the field of new energy automobile manufacturing, 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 doorsill, wherein the automobile door ring plays a key role in protecting the safety of a driver and passengers in an automobile when the automobile is impacted, particularly small offset collision and side collision. The traditional door ring manufacturing method adopts a split type production manufacturing scheme that door ring parts are subjected to separate hot stamping and then are spliced; at present, with the development of new energy automobiles, automobile manufacturers have higher and higher requirements for light weight.
The preparation method of the integrated door ring also comes from the beginning, for example, the front door ring of the automobile and the manufacturing method thereof, the front door hole assembly comprises a front door hole lower section, a front door hole upper section, a front door hole B middle section and a front door hole B lower section, wherein the front door hole assembly comprises a front door hole A lower section, a front door hole A upper section, a front door hole B middle section and a front door hole B middle section; the lower sections of the A pillar and the B pillar are in lap joint with the threshold; but because the door opening and the doorsill are separately produced and manufactured and then are lapped; there is the overlap joint part, and the lightweight degree is not enough, and probably has heating and punching press deformation great when carrying out the punching press of door opening part, is unfavorable for batch production's uniformity.
Disclosure of Invention
The invention aims to provide a method and a die for processing an automobile half door ring, so as to be convenient for mass production of light automobile door rings.
In order to achieve the purpose, the invention 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 pieces of an A column, an upper edge beam, a B column, a lower half section of the B column and a lower half section of the A column;
s2, performing laser tailor-welding on the column A blanking piece, the upper edge beam blanking piece, the column B lower half-section blanking piece and the column A lower half-section blanking piece 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 sheet by using a connecting piece to obtain a pseudo door ring blank;
s4, heating the blank of the pseudo door ring to a certain temperature, and then sending the heated blank into a hot stamping device for hot stamping;
and S5, cutting the pseudo door ring blank subjected to hot stamping to obtain a complete half door ring.
The principle and the advantages of the scheme are as follows: when blanking is carried out, plates with different thicknesses and different materials are selected to blank the door ring at different positions, wherein when the lower half part of the column B and the lower half part of the column A are blanked, auxiliary areas can be blanked, and after blanking is finished, all parts are welded into half door ring blanking pieces by adopting laser tailor-welding; then connecting the two auxiliary areas of the spliced and welded semi-door ring blanking sheet by adopting a connecting piece; then the connected half door ring blanking sheets are sent to a heating furnace for heating, the heated half door ring blanking sheets are transferred to a hot stamping device for hot stamping, and finally, the edge cutting is carried out to obtain a complete half door ring;
in practical application, the half door ring is adopted, so that the position of the doorsill is cancelled, and no lap joint exists, so that the produced door ring is lighter; plates with different thicknesses and different materials are adopted for blanking, and each part of the rear half door ring after hot stamping is finished further realizes light weight on the basis of meeting the strength requirement; generally, 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 during hot stamping, the welded half door ring falling material sheet is deformed by heating and pressing, and the deformation is not favorable for the consistency of the produced door ring and influences the assembly precision of the produced door ring;
in the application, the blanking sheets of the lower half sections of the B column and the A column of the blanking sheet of the half door ring are connected by the connecting piece to form a pseudo door ring; when the semi-portal frame is used, the connecting piece has a binding effect on the semi-portal frame blank, so that the semi-portal frame die is prevented from generating large uncontrollable deformation when being heated and pressed, the application is suitable for large-scale semi-portal frame production, and the produced semi-portal frames have consistency; finally, the light weight of the door ring is realized.
As an improvement, when blanking is performed in step S1, the obtained a-column lower half blanking sheet and B-column lower half blanking sheet include auxiliary areas for auxiliary connection of the a-column lower half blanking sheet and the B-column lower half blanking sheet;
the effect of this is: the auxiliary area is directly formed in the blanking process, so that the connecting piece can be connected into a fake door ring through spot welding, and the influence on the manufacture of the door ring is avoided due to the reserved auxiliary area.
As an improvement, the material of the connecting piece in the step S3 is waste steel plate or waste material;
the effect of this is: the connecting piece adopts the waste material preparation, has promoted the utilization ratio of material, environmental protection more.
As an improvement, in the step S1, when the lower half section of the column A and the lower half section of the column B are blanked, the auxiliary area and blanking pieces are blanked 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;
the effect of this is: setting the length of a spot welding area to be 26-30mm, wherein the length is the optimal length for spot welding of the connecting piece, and the connecting piece is convenient for connecting the blanking piece of the lower half section of the A column with the blanking piece of the lower half section of the B column; and the length does not influence the utilization rate of the plate.
As an improvement, corresponding positioning holes are formed in the spot welding area and the connecting piece, and the diameter of each positioning hole is 5-7mm; the positioning hole is used for connecting and positioning the spot welding area and the connecting piece when the automobile half door ring is machined through the pin.
The effect of this is: the locating hole that sets up in the spot welding area is favorable to the connecting piece to fix a position when spot welding, guarantees that pseudo-door ring has the uniformity, and then guarantees that the pseudo-door ring of producing also has the uniformity, is favorable to the batch production of door ring, and still fixes a position through pin joint, further assurance uniformity.
As an improvement, the thicknesses of the A column blanking sheet, the upper edge beam blanking sheet, the B column lower half blanking sheet and the A column blanking sheet in the step S1 are all 1.2mm-1.6mm.
The effect of this is: aiming at different vehicle types and different technical requirements, each part of the door ring is blanked by selecting plates with different thicknesses, and then is stamped and strengthened, so that the light weight is realized while the strength requirement is met, wherein the thickness of the material sheet is 1.2-1.6mm, which is the optimal thickness for meeting the different strength requirements and realizing the light weight.
As an improvement, the waste material area and the connecting piece are provided with corresponding positioning holes;
the effect of this is: when the connecting piece is welded, the positioning holes are aligned, so that the connecting piece is convenient to weld, and the position consistency of the connecting piece can be ensured.
As an improvement, in the step S4, the pseudo door ring blank is heated by a roller-hearth heating furnace, the roller-hearth heating furnace is provided with 7-9 heating zones, the temperature of each heating zone is 810-950 ℃, and the heating time is 6-8min;
the effect of this is: the roller-hearth heating furnace is adopted for heating, the temperature is stable, the heating efficiency is high, the material piece can be uniformly heated, the temperature is set in a partitioning mode, the heating time is set in the partitioning mode, and sufficient austenitization of the blanking pieces with different thicknesses and different materials is facilitated.
As an improvement, when hot stamping is carried out in the step S4, the temperature of the false door ring blank is more than or equal to 730 ℃;
the effect of this is that, the temperature is greater than 730 ℃ when the false door ring blank is hot stamped, and under the effect of hot stamping device, the heat is rapidly exported during hot stamping, makes the blank temperature reduce rapidly, makes the door ring blank transform into martensite structure from austenite, namely fully hardens.
The application also provides a die for processing the automobile half door ring, and the die is adopted to process the half door ring in the processing method.
Drawings
FIG. 1 is a flow chart of a method for manufacturing a door ring of an automobile according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an automobile false door ring blank according to an embodiment of the invention.
Fig. 3 is a schematic view of an automotive door hinge structure according to an embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
the reference numbers in figure 1 of the specification include: the blanking device comprises an A column blanking piece 1, an upper edge beam blanking piece 2, a B column blanking piece 3, a B column lower half-section blanking piece 4, an A column lower half-section blanking piece 5 and a connecting piece 6.
The application provides a half door ring processing method and mould of car, wherein half door ring similar with conventional door ring, but compare with ordinary door ring and cancelled the threshold assembly, consequently be similar to the U-shaped, more be favorable to the lightweight.
The embodiment is basically as shown in the attached figure 1:
the processing method of the automobile half door ring specifically comprises the following steps:
s1, blanking is carried out on a plate to obtain a column A, an upper edge beam, a column B, a lower half section of the column B and blanking pieces of the lower half section of the column A; during implementation, auxiliary areas are also blanked during blanking of the lower half section of the column B and the lower half section of the column A, and the auxiliary areas are 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 column A adopts CR950/2000HS hot forming steel, the material thickness is 1.6mm, the upper boundary beam and the column B adopt CR950/1300HS hot forming steel, the material thickness is 1.6mm, the lower half section of the column B adopts CR350/550HS hot forming steel, the material thickness is 1.6mm, the lower half section of the column A adopts CR780/980HS hot forming steel, and the material thickness is 1.2mm;
step S2, as shown in the attached figure 2, performing laser tailor welding on the column A blanking piece 1, the upper edge beam blanking piece 2, the column B blanking piece 3, the column B lower half-section blanking piece 4 and the column A lower half-section blanking piece 5 to obtain a half door ring blanking piece;
s3, as shown in the attached figure 2, connecting the lower half section 5 of the column A and the lower half section 4 of the column B of the semi-gate ring blanking sheet by using a connecting piece 6 to obtain a pseudo gate ring blank; when the method is implemented, the auxiliary areas at the ends of the blanking pieces at the lower half section of the column A and the lower end of the column B are used for spot welding of connecting pieces; in implementation, the connecting piece 6 is a waste steel plate which can be made of waste materials in blanking, so that the utilization rate of materials is increased; at present, the waste materials in blanking are almost recycled, melted and then molded, so that the overall cost is high; and this application directly utilizes the abandonment steel sheet repeatedly to as conventional instrument, promoted the utilization ratio of material.
In step S3, a part of the auxiliary area formed by blanking is used as a spot welding area for spot welding the connecting piece 6 to connect and fix the lower half blanking piece of the a-pillar and the lower half blanking piece of the B-pillar; forming a pseudo door ring blank after the spot welding of the connecting piece is completed; the connecting piece for spot welding plays roles of binding and connecting and fixing, and during implementation, due to the existence of the connecting piece, the thermal deformation degree of the pseudo door ring blank in the heating furnace is greatly reduced, and the consistency during stamping is well ensured; in specific implementation, the thickness of the connecting piece is larger than that of the blanking piece, so that better connection and fixation effects can be achieved;
during implementation, the length of the spot welding area is preferably 26-30mm, the spot welding area with the length of 28mm and 28mm in the embodiment is convenient for welding a connecting piece on one hand, provides sufficient welding points for the connecting piece, is convenient for welding the connecting piece and saves consumption of plates;
when the method is implemented, 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 the positioning holes consistent with the positioning holes of the connecting piece, so that the positioning is convenient during spot welding through the positioning holes, and the consistency of the production of the pseudo door ring blank is ensured; when in implementation, the positioning holes can be fixed by pins, so that the installation and the fixation are convenient; the diameter of the positioning hole is preferably 5-7mm, and in the implementation, the diameter is 6mm.
S4, heating the pseudo door ring blank to a certain temperature, and then sending the heated pseudo door ring blank into a hot stamping device for hot stamping; in the embodiment, the roller-hearth heating furnace is sequentially divided into nine heating zones, wherein the temperature of the nine heating zones is controlled to be 830/+/-20 ℃, 850/+/-20 ℃, 870/+/-20 ℃, 890/+/-20 ℃, 910/+/-20 ℃, 930/+/-20 ℃, 830/+/-20 ℃ and 830/+/-20 ℃; the heating mode of the temperature gradient type is adopted, full austenitizing of blanking sheets of different materials and different thicknesses is facilitated, and during implementation, the heating time of the blank of the false door ring in the heating furnace is 6-8min, in the embodiment, 400 seconds;
the method comprises the steps that after a pseudo door ring blank is fully austenitized, the pseudo door ring blank is transferred into a die in a hot stamping device for hot stamping, the temperature of the pseudo door ring blank is required to be guaranteed to be higher than 730 ℃ during hot stamping, the pseudo door ring blank is stamped for one time, the die is closed and the pressure is maintained after the stamping, and the pressure maintaining effect of the die is to prevent the nonuniformity of thermal expansion and cold contraction in the pressure maintaining process, so that the part is greatly changed in shape and size and is scrapped; during pressure maintaining, the multi-section water path circulation arranged in the die cavity enables the false door ring blank to be rapidly cooled and quenched, the blank material is converted from austenite to martensite, and the strength is improved; when the method is implemented, the stamping 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 is lower than 200 ℃ after the pressure maintaining is finished; after hot stamping is finished, the tensile and compression strength of the A column and the upper side 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 tensile strength of the lower half section of the A column exceeds 900Mpa.
S5, as shown in the attached figure 3, cutting the hot-stamped fake door ring blank to obtain a complete half door ring; and after the hot stamping is finished, cutting and shaping the auxiliary area and the redundant part in a laser cutting mode to obtain a complete half door ring.
The application also provides a mold for processing the automobile half door ring, and the mold is adopted in the processing method for processing the half door ring.
It is worth to be noted that, in the inherent concept, the less the redundant part after stamping, the better, and the closer the blanking position on the plate, the better, so as to ensure the full utilization of the material; in fact, however, gaps among the blanking pieces exist, the plate cannot be ideally and fully utilized, and in the blanking process, a part of the gaps are blanked into the auxiliary area, so that the utilization rate of the gap space of the plate is improved through the arrangement of the auxiliary area; the auxiliary area and the connecting piece can well ensure that the material falling piece of the half door ring cannot 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 can be recycled, so that the utilization rate of the materials is greatly improved, and the connecting piece is more environment-friendly.
Therefore, the connecting piece connects the lower half section of the column B and the lower half section of the column A of the half door ring blanking piece to form a pseudo door ring; when the semi-portal frame is used, the connecting piece has a binding effect on the semi-portal frame blank, so that the semi-portal frame blank and the die are prevented from generating large uncontrollable deformation when being heated and pressed, the application is suitable for large-scale semi-portal frame production, and the produced semi-portal frames have consistency; finally, the light weight of the door ring is realized, and meanwhile, the strength requirement is met; and the utilization rate of materials is improved through the arrangement of the connecting piece and the auxiliary area.
The above description is only an example of the present invention, and the general knowledge of the known specific technical solutions and/or characteristics and the like in the solutions is not described herein too much. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (9)
1. The method for processing 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 column A blanking piece, an upper edge beam blanking piece, a column B lower half section blanking piece and a column A lower half section blanking piece;
s2, performing laser tailor-welding on the column A blanking piece, the upper edge beam blanking piece, the column B lower half-section blanking piece and the column A lower half-section blanking piece 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 semi-gate ring blanking sheet by using a connecting piece to obtain a pseudo-gate ring blank;
s4, heating the pseudo door ring blank to a certain temperature, and then sending the heated pseudo door ring blank into a hot stamping device for hot stamping;
and S5, cutting the pseudo door ring blank subjected to hot stamping to obtain a complete half door ring.
2. The method for machining the automobile half door ring according to claim 1, wherein: when blanking is performed in the step S1, the obtained a-column lower half blanking piece and B-column lower half blanking piece include auxiliary areas, and the auxiliary areas are used for assisting in connecting the a-column lower half blanking piece and the B-column lower half blanking piece.
3. The method for machining the automobile half door ring according to claim 1, wherein: the connecting piece in the step S3 is made of waste steel plates or waste materials.
4. The method for processing the automobile half door ring according to claim 3, characterized in that: in the step S1, when the lower half section of the column A and the lower half section of the column B are blanked, blanking of an auxiliary area and blanking pieces is completed 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.
5. The method for machining the automobile half door ring according to claim 4, wherein: the spot welding area and the connecting piece are provided with corresponding positioning holes, the diameter of each positioning hole is 5-7mm, and the positioning holes are used for connecting and positioning the spot welding area and the connecting piece when the automobile half door ring is machined through pins.
6. The method for machining the automobile half door ring according to claim 1, wherein: the thicknesses of the column A blanking piece, the upper edge beam blanking piece, the column B blanking piece, the lower half section blanking piece of the column B and the column A blanking piece in the step S1 are all 1.2mm-1.6mm.
7. The automobile half door ring processing method according to claim 1, characterized in that: and S4, heating the pseudo door ring blank by adopting a roller hearth type heating furnace, wherein the roller hearth type heating furnace is provided with 7-9 heating zones, the temperature of each heating zone is 810-950 ℃, and the heating time is 6-8min.
8. The method for machining the automobile half door ring according to claim 1, wherein: when hot stamping is performed in the step S4, the temperature of the dummy door ring blank is more than or equal to 730 ℃.
9. A mould for processing of car half door ring, its characterized in that: the method for processing the automobile half door ring as claimed in any one of claims 1 to 8.
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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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| CN115431009A true CN115431009A (en) | 2022-12-06 |
| CN115431009B CN115431009B (en) | 2023-12-05 |
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