CN108620510A - A kind of lightweight dissimilar steel integration hot forming automobile door frame preparation method - Google Patents
A kind of lightweight dissimilar steel integration hot forming automobile door frame preparation method Download PDFInfo
- Publication number
- CN108620510A CN108620510A CN201810329856.1A CN201810329856A CN108620510A CN 108620510 A CN108620510 A CN 108620510A CN 201810329856 A CN201810329856 A CN 201810329856A CN 108620510 A CN108620510 A CN 108620510A
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- China
- Prior art keywords
- frame
- door frame
- laser
- steel plate
- steel
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/74—Making other particular articles frames for openings, e.g. for windows, doors, handbags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
-
- 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
Abstract
The present invention proposes a kind of lightweight dissimilar steel integration hot forming automobile door frame preparation method.Automobile door frame is made of five parts, is required according to its different mechanical properties, has been selected the high strength steel plate of different characteristics.Processing technology of the present invention is：(1) hot press-formed (4) pickling of laser cutting (2) laser assembly solder (3) integration.The present invention has the beneficial effect that：Xenogenesis high strength steel plate material is selected, suitable dimension is laser-cut into, uses integrated body heat stamping after laser assembly solder.Automobile front doorframe integral strength and plasticity are greatly improved, and there is higher rigidity.The ability for improving the resistance to deformation of door frame and absorbing impact improves the safety of automobile；Drop stamping keeps doorframe forming accuracy high, and rebound is low, and required stamping equipment tonnage is smaller.The weight for reducing vehicle frame improves automotive light weight technology level.In addition, processing technology of the present invention is simple, efficiency is higher, meets the requirement of product mass production, product strength plasticity is excellent, stable quality.
Description
Technical field
The present invention relates to technical field of automobile components, more particularly to a kind of automobile door frame preparation method.
Background technology
The lightweight of automobile is to reduce the kerb weight of automobile under the premise of ensureing the intensity and security performance of automobile,
To improve the dynamic property of automobile, fuel consumption is reduced, reduces exhaust pollution.For energy saving, reduction discharge capacity and meet each
The environmental regulation of state, and meet the people to automotive performance increasingly higher demands, automotive light weight technology has become world car work
One of the main trend of industry development.And the extensive application of automobile high-strength steel is an important trend of automotive light weight technology development.Often
The high-strength steel seen has dual phase steel (dual-phase steel, DP steel), hot forming (Hot-Stamping, HS) steel and Q＆P
(Quenching-Partitioning) steel etc..High-strength hardness of steel is higher, and plasticity is preferable, has larger strength and ductility product, Ke Yigai
The safety of kind automobile.The mechanical property of different high-strength steel grades also has larger difference.
Automobile door frame is welded on vehicle frame, is the frame of door device.Higher intensity, rigidity are required, to ensure
Carrying to door device；With larger strength and ductility product to improve the Side-impact safety of automobile.Orthodox car doorframe shapes
Cold forming process is generally used, welding forming doorframe and the integrally formed doorframe of punching press after seperated punching press can be divided into.Seperated punching press
The doorframe advantage of welding procedure production is that the costs such as corresponding mould, steel plate dosage are relatively low afterwards, and productivity is higher；The disadvantage is that Welder
The quality control of skill process is more difficult.Because the thickness of car door steel plate is relatively partially thin, welding procedure control is bad, is likely to result in office
Portion's intensity is decreased obviously；Or cause part brittle, fracture would tend to occur when larger by collision deformation.Reliability of technology compared with
Difference.The integrally formed doorframe advantage of cold stamping is whole stamping, the punching press of mass ratio fission and then the more easily control of welding fabrication
System, the disadvantage is that the steel plate that ductility must be used good, and the height of diel cost and steel plate amount ratio welding forming.
Automobile door frame using high strength steel plate production has higher comprehensive mechanical property, and the lightweight water of automobile can be improved
It is flat.The formability of high-strength steel at normal temperatures is very poor, will appear easy to crack, surface folding using traditional cold punching forming process, returns
The problems such as bullet is serious.Heat forming technology has forming pressure small, and low, the high advantage of dimensional accuracy is sprung back after forming.Hot forming work
The enough forming properties for improving high-strength steel sheet to a certain extent of artistic skill are to realize using hot forming techniques manufacture body structural member
Body lightening and the important channel for improving vehicle safety.HS-Q＆P techniques are that hot forming techniques and quenching-are matched division technique
A kind of novel hot forming techniques being combined.HS-Q＆P integral process mainly includes the following steps that：1. steel plate is complete
After full austenite and held for some time；2. carrying out hot press-formed, make Austenite Grain Refinement, and obtain definite shape ruler
It is very little；3. rapid quenching is to a certain temperature between Ms and Mf, with the austenite for obtaining the supersaturated martensite in part and not changing；④
Specific hardening heat isothermal for a period of time, so that carbon is distributed from martensite to retained austenite, the carbon content in martensite at this time
Decline, the carbon content in austenite increases, to make retained austenite richness carbon so as to stable to room temperature；5. being quenched to room
Temperature.Hot forming techniques forming is accurate, and microscopic structure is martensite, ferrite and retained austenite.With phase change induction plasticity
(Transformation Induced Plasticity) effect, i.e. retained austenite are changed into martensite under external force,
Make product that there is good intensity to arrange in pairs or groups with plasticity.
Laser cutting and welding have a wide range of applications in auto industry.Automobile door frame mainly by sheet stamping and
At, since stamping parts is in irregular shape, plank waste material large percentage when punching blanking.High strength steel plate can be improved in laser cutting parameter
The utilization rate of material；It is multiple that laser assembly solder blanket can be cut into different-thickness, different surfaces according to optimization Intensity Design and use condition
Layer and material are welded into a whole blanket, then one time punching molded.Weight can be mitigated, simplify production technology, improve efficiency, drop
Low production cost.
Invention content
In view of the above problems, the present invention proposes integrated hot forming automobile door frame system after a kind of lightweight different steel weld
Preparation Method.It is horizontal for the comprehensive mechanical property and lightweight that improve automobile door frame, according to the requirement to automobile door frame mechanical property,
The high strength steel plate of different characteristics has been selected, it is suitably sized using being laser-cut into, it is hot using integration is carried out after laser assembly solder
Sheet Metal Forming Technology.Simple for process, product is with the advantages that lightweight, strength plastic is excellent, efficient stable.
The concrete scheme of the present invention is as follows, entire automobile front doorframe is divided into five parts, each section is using different
The high strength steel plate of mechanical property：The left right vertical frame of doorframe uses hot forming steel 22MnB5 steel plates, lower transverse frame to use dual phase steel DP590
Steel plate, left oblique frame use QP980 steel plates, upper transverse frame to use IF steel.
The present invention processing technology be：(1) hot press-formed (4) pickling of laser cutting (2) laser assembly solder (3) integration
In the step (1), according to specification using being cut by laser, high strength steel plate is cut into respectively suitably sized.
In the step (2), the high strength steel plate that suitable dimension is cut into step (1) is shaped using laser assembly solder, is swashed
Light weld width is 0.5~1mm, and in no silk filling, face of weld necessarily has certain concavity.To ensure quality, concavity
It is strict controlled within the 10% of plate thickness with edges of boards clearance requirement is docked.Under this condition, using CO2 Laser Weldings, power is
1300W, weldering speed 4m/min.
In the step (3), the blanket after laser assembly solder is transferred in roller hearth type heating furnace, under protective atmosphere with
10-15 DEG C/s rates are heated to 900-950 DEG C, keep the temperature 5-10min, carry out austenitizing processing；It will be fast after austenitizing blanket
Speed is transferred in diel, hot press-formed using the progress integration of 800MPa hot stamping machines, and 240-280 is quenched in mould
DEG C, 10-20s is kept the temperature, carbon partition is carried out；Finally by stamping parts water quenching to room temperature.Hot forming techniques forming is accurate, forms
Quenching, carbon obtain partition, improve the stability of retained austenite in mould after shape.Microscopic structure is martensite, iron element
Body and retained austenite.Retained austenite has TRIP effects, is changed into martensite under external force, so that product is had good
Intensity and plasticity arrange in pairs or groups.
In the step (4), the hot press-formed automobile door frame of integration is subjected to pickling.
Advantageous effect：
The automobile door frame produced using above method has been selected xenogenesis high strength steel plate, adopted according to the requirement of its different parts
It is suitable specification with laser cutting, integrated hot press-formed, pole after being welded by different mechanical properties xenogenesis steel plate
The earth improves automobile front doorframe integral strength and plasticity, and strength and ductility product is higher, and has higher rigidity.Improve car door door
The resistance to deformation of frame and the ability absorbed impact, improve the safety of automobile.The present invention is compared with orthodox car doorframe loss of weight 10-
15%, improve automotive light weight technology level.Drop stamping technology with keeping doorframe forming accuracy high, almost without rebound, and required
Stamping equipment tonnage is smaller.In addition, efficiency of the present invention is higher, meet the requirement of product mass production, stable quality, cost compared with
It is low.
Description of the drawings
Fig. 1 is plate schematic diagram before present invention forming.
Fig. 2 is heat forming technology schematic diagram of the present invention.
Fig. 3 is structural schematic diagram after present invention forming.
Specific implementation mode
With reference to embodiment, invention is further explained with attached drawing.
As shown in Figure 1, entire door frame is divided into five parts, respectively right vertical frame 1, lower transverse frame 2, left vertical frame 3, left oblique frame
4 and upper transverse frame 5.Using different high-strength steel sheets.Right vertical frame 1 and left vertical frame 3 use hot forming steel plate 22MnB5, lower cross in Fig. 1
Frame 2 uses DP590 steel plates, left oblique frame 4 that QP980 steel plates, upper transverse frame 5 is used to use IF steel.
Right vertical frame 1 of the present invention and 3 part of left vertical frame use the thickness that Baosteel produces for the hot forming steel plate of 1.5mm
22MnB5, ingredient are 0.22C-0.92Mn-0.17Si (wt.%), and intensity is 1500MPa ranks, elongation percentage 6-8%.By force
Degree is higher, when automobile side receives shock, greater impact can be shared together with automobile B-column, while deformation is smaller, prevents from deforming
Seriously occupant is damaged.
Lower transverse frame 2 of the present invention uses the thickness that Baosteel produces for the DP590 steel plates of 1.5mm, ingredient 0.18C-
2.20Mn-0.08Ti (wt.%) intensity is 600MPa ranks, but elongation percentage is higher, and plasticity is excellent.The each position of body structure
Intensity will form an incremental order, can be crushed deformation energy-absorbing when being hit according to certain mode of texturing.Using
The lower transverse frame of DP590 steel plates manufacture, is located at vehicle frame bottom, can be plastically deformed when being hit, absorb big energy.
Left oblique frame 4 of the present invention uses the thickness that Baosteel produces for the QP980 steel plates of 1.5mm, ingredient 0.18C-
1.74Si-2.31Mn (wt.%), the yield strength and tensile strength of QP980 steel are respectively 780MPa and 1122MPa, are uniformly prolonged
It is 18.7% to stretch rate.There is QP980 steel good plasticity to arrange in pairs or groups with intensity, and strength and ductility product is higher.When automobile side is hit,
Greater impact can be shared together with automobile A column, while deformation is smaller, prevent deformation from seriously being damaged to member.Head-on crash
When, energy can pass through A columns, hinge pillar inner panel is transmitted upwards along vehicle body.After QP980 steel plates are applied in load transfer path
The vital part of section, be applied to it is adjacent with A columns make oblique frame, a part for occupant's cabin structure as a high intensity,
Structure longitudinal strength is improved, plays the role of protecting passenger safety；
Upper transverse frame 5 of the present invention uses thickness for the IF steel plates of 1.5mm.Positioned at vehicle arch.Require good modeling
Property.Deformation energy-absorbing can be crushed when being hit according to certain mode of texturing.
Automobile door frame of the present invention can loss of weight 10-15% compared with orthodox car doorframe.
The present invention processing technology be：
(1) it is cut by laser, five part high strength steel plates is become into required specification using laser cutting respectively.Laser is cut
Cut the utilization rate that high-strength steel plank can be improved in technique.
(2) laser assembly solder shapes the steel plate of laser cutting to definite shape using laser assembly solder.Laser welded seam width is
0.5~1mm, concavity are strict controlled in edges of boards clearance requirement is docked within the 10% of plate thickness.Under this condition, swashed using CO2
Flush weld, power 1300W, weldering speed 4m/min.It prepares for drop stamping is integrally formed.
(3) drop stamping, using HS-QP heat forming technologies.Blanket after laser assembly solder is transferred in roller hearth type heating furnace,
It is heated to 900-950 DEG C with 10-15 DEG C/s rates, keeps the temperature 5-10min, carries out complete austenitizing processing；By complete austenite
It is quickly transferred in diel after change, hot press-formed using the progress integration of 800MPa hot stamping machines, jig frequency is per minute 3
Part.It is quenched to 240-280 DEG C in mould, keeps the temperature 10-20s, carries out carbon partition, water quenching later to room temperature.
(4) the hot press-formed automobile door frame of integration is carried out pickling by pickling.
Claims (4)
1. integrated hot forming automobile door frame after a kind of lightweight different steel weld, which is characterized in that entire door frame is divided into five
Xenogenesis high strength steel plate material is selected according to the difference of its mechanical requirements in part, is laser-cut into suitable dimension, after laser assembly solder
It is hot press-formed using integration, form the hot press-formed technique of integration after different steel weld.
2. five part of automobile door frame described in claim 1 is to be respectively left vertical frame, right vertical frame, upper transverse frame, lower transverse frame and a left side are oblique
Frame.Right vertical frame and left vertical frame use hot forming steel plate 22MnB5, lower transverse frame that DP590 steel plates, left oblique frame is used to use QP980 steel
Plate, upper transverse frame use IF steel.
3. it is 0.5~1mm that the LASER BUTT WELDING parameter described in claim 1, which is laser welded seam width, face of weld it is recessed
Degree with dock edges of boards clearance requirement and be strict controlled within the 10% of plate thickness.Using CO2 Laser Weldings, power 1300W, weldering speed
3m/min。
4. the integrated drop stamping technique described in claim 1 is to be heated to 10-15 DEG C/s rates under protective atmosphere
900-950 DEG C, 5-10min is kept the temperature, carries out austenitizing processing；It will be quickly transferred in diel after austenitizing blanket,
It is hot press-formed using the progress integration of 800MPa hot stamping machines, it is quenched to 240-280 DEG C in mould, keeps the temperature 10-20s, carries out carbon
Elemental partition；Finally by stamping parts water quenching to room temperature.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810329856.1A CN108620510A (en) | 2018-04-12 | 2018-04-12 | A kind of lightweight dissimilar steel integration hot forming automobile door frame preparation method |
| CN201910210539.2A CN109759522A (en) | 2018-04-12 | 2019-03-19 | A kind of lightweight dissimilar steel integration hot forming automobile door frame preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810329856.1A CN108620510A (en) | 2018-04-12 | 2018-04-12 | A kind of lightweight dissimilar steel integration hot forming automobile door frame preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108620510A true CN108620510A (en) | 2018-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810329856.1A Withdrawn CN108620510A (en) | 2018-04-12 | 2018-04-12 | A kind of lightweight dissimilar steel integration hot forming automobile door frame preparation method |
| CN201910210539.2A Pending CN109759522A (en) | 2018-04-12 | 2019-03-19 | A kind of lightweight dissimilar steel integration hot forming automobile door frame preparation method |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910210539.2A Pending CN109759522A (en) | 2018-04-12 | 2019-03-19 | A kind of lightweight dissimilar steel integration hot forming automobile door frame preparation method |
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| CN (2) | CN108620510A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085587A (en) * | 2019-12-24 | 2020-05-01 | 东莞市豪斯特热冲压技术有限公司 | Stamping process |
| CN111716067A (en) * | 2020-05-14 | 2020-09-29 | 广汽新能源汽车有限公司 | Auxiliary vehicle plate manufacturing process, auxiliary vehicle frame manufacturing process and auxiliary vehicle frame |
| CN113441617A (en) * | 2021-06-10 | 2021-09-28 | 东风柳州汽车有限公司 | Oil filler seat and stamping method thereof |
| CN113664470A (en) * | 2021-08-20 | 2021-11-19 | 东风(武汉)实业有限公司 | Thermoforming integral door ring based on laser tailor-welded blank and patch board and preparation method thereof |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110773630B (en) * | 2019-11-05 | 2022-02-11 | 山东钢铁集团日照有限公司 | Method for solving uneven conductive heating temperature of irregular blank |
| CN114104116A (en) * | 2021-11-30 | 2022-03-01 | 重庆长安汽车股份有限公司 | Automobile front door ring and manufacturing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11104750A (en) * | 1997-09-30 | 1999-04-20 | Nissan Motor Co Ltd | Press forming method for abutt welding board |
| CN102162574B (en) * | 2011-03-31 | 2012-12-19 | 山东建筑大学 | Ultrahigh-strength steel laser tailor welded blank and forming process thereof |
| CN115626223A (en) * | 2014-09-22 | 2023-01-20 | 安赛乐米塔尔公司 | Method for manufacturing door frame of vehicle and method for manufacturing reinforcing structure of vehicle |
| KR101657798B1 (en) * | 2014-12-17 | 2016-09-20 | 주식회사 포스코 | Tailor blank manufacturing method |
| CN205203127U (en) * | 2015-11-02 | 2016-05-04 | 福建省汽车工业集团云度新能源汽车股份有限公司 | Light -weighted automobile body |
| CN106350741B (en) * | 2016-10-24 | 2017-12-19 | 大连理工大学 | A kind of warm working preparation method of laser assembly solder high-strength steel |
-
2018
- 2018-04-12 CN CN201810329856.1A patent/CN108620510A/en not_active Withdrawn
-
2019
- 2019-03-19 CN CN201910210539.2A patent/CN109759522A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085587A (en) * | 2019-12-24 | 2020-05-01 | 东莞市豪斯特热冲压技术有限公司 | Stamping process |
| CN111716067A (en) * | 2020-05-14 | 2020-09-29 | 广汽新能源汽车有限公司 | Auxiliary vehicle plate manufacturing process, auxiliary vehicle frame manufacturing process and auxiliary vehicle frame |
| CN113441617A (en) * | 2021-06-10 | 2021-09-28 | 东风柳州汽车有限公司 | Oil filler seat and stamping method thereof |
| CN113441617B (en) * | 2021-06-10 | 2022-08-26 | 东风柳州汽车有限公司 | Oil filler seat and stamping method thereof |
| CN113664470A (en) * | 2021-08-20 | 2021-11-19 | 东风(武汉)实业有限公司 | Thermoforming integral door ring based on laser tailor-welded blank and patch board and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109759522A (en) | 2019-05-17 |
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Application publication date: 20181009 |