CN104527807A - Column B and manufacturing method - Google Patents
Column B and manufacturing method Download PDFInfo
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- CN104527807A CN104527807A CN201410785277.XA CN201410785277A CN104527807A CN 104527807 A CN104527807 A CN 104527807A CN 201410785277 A CN201410785277 A CN 201410785277A CN 104527807 A CN104527807 A CN 104527807A
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- thickness area
- thickness
- main body
- post
- post main
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Classifications
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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
- B62D25/04—Door pillars ; windshield pillars
-
- 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a column B and a manufacturing method. The column B comprises a column B body. An upper fixed part fixed to a vehicle roof is arranged on the top of the column B body. A lower fixed part fixed to a threshold is arranged at the bottom of the column B body. The column B is characterized in that a first thickness area is arranged at the upper portion of the column B body, a second thickness area is arranged at the lower portion of the column B body, and a third thickness area is arranged in the middle of the column B body; the thicknesses of the first thickness area and the second thickness area are each 1.2 mm, and the thickness of the third thickness area is 1.7 mm; the heights of the first thickness area and the second thickness area each account for one fourth to one third of the height of the column B body; reinforcing pipes are arranged on the third thickness area, are hollow pipes and are obtained through a hydraulic forming process. The thicknesses of the pipe walls of the reinforcing pipes are each 1.8 mm+/-30%. By means of the reinforcing pipes obtained through hydraulic forming, the section design of the reinforcing pipes can be changed according to the flexible change of the column B body, so that loads on each section are more uniform, and the column B meets the requirements for light weights of vehicles.
Description
Technical field
The present invention relates to a kind of B post and manufacture method, belong to vehicle part technical field.
Background technology
The B post of automobile is the vertical beam on automobile, between the front stall and back seat of driving compartment, extends to bottom car from roof.B post is supported cart top cover not only, also will bear the supporting power of forward and backward car door, B post is also wanted some additional components of device, the safety strap of such as dress circle, sometimes also will wear electric wire wire harness.Therefore B post mostly has external convex radius, transmits performance to ensure good power.The B column section shape of Modern Car is more complicated, and it is welded by more than one piece stamping steel plate.Along with the development of auto manufacturing technology, need not weld and directly adopt the closed section center pillar of shaped by fluid pressure to come out, its rigidity improves greatly and weight significantly reduces, and is conducive to the lightweight of Modern Car.
In side impact test and traffic accident, B post plays important shock resistance effect.The impact that existing B post generally adopts the structure of one piece of unchanged B post of thickness to cause to bear side collision, also has and adopts Tailor-welded Blank Structure by the Plate Welding of different-thickness mode together.The advantage that the structure adopting thickness to change B post exists better can protect driver and crew, can reach distortion energy-absorbing object during collision; And adopting the mode of traditional condition of equivalent thickness Plate Welding, the defect of existence is: (1) B post and reinforcement steel plate are generally cold-stamped part, needs new mold and welding tooling; (2) the cold-worked part weight of equality strength is large, does not meet lightweight trend; (3) B post and strengthen steel plate shaping respectively after product realize coupling welding again, stability is not high, and quality control is more difficult, and condemnation factor is high; (4) the upper and lower intensity of B post is the same, and when there is side collision, do not have energy-absorbing deformation place, enormous impact power returns harm driver safety.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of B post and manufacture method are provided, adopt the reinforced pipe of hydraulic forming, the Cross section Design of reinforced pipe can be changed according to B post shapes flexibly, make the load of each cross section more even, and meet vehicle lightweight requirements.
According to technical scheme provided by the invention, described B post, comprises B post main body, and B post body top is the upper fixed part fixing with roof, and B post bottom part body is the lower fixed part fixing with threshold; It is characterized in that: the top of described B post main body is the first thickness area, and bottom is the second thickness area, middle part is the 3rd thickness area; The thickness of described first thickness area and the second thickness area is 1.2 mm, and the thickness of the 3rd thickness area is 1.7 mm; The height of described first thickness area and the second thickness area accounts for 1/4 ~ 1/3 of B post body height respectively; Arrange reinforced pipe at described 3rd thickness area, reinforced pipe is hollow tube, is obtained by Hydroform process.
The thickness of pipe of described reinforced pipe is 1.8mm ± 30%.
The manufacture method of described B post, is characterized in that, comprise the following steps:
(1) laser assembly solder is adopted to obtain the blank of the B post main body with the first thickness area, the second thickness area and the 3rd thickness area, the blank of B post main body is heated to 850 ~ 940 DEG C in heating furnace, make it be converted into austenite structure, the blank of described B post main body adopts 22MnB5(to be commonly called as boron steel);
(2) blank of the B post main body after austenitizing is carried out Heat forming in mould, and quench simultaneously; Wherein, the thickness of the first thickness area and the second thickness area is 1.2 mm, and the thickness of the 3rd thickness area is 1.7 mm;
(3) selection material is the straight tube of dead-soft steel, corrosion-resistant steel, aluminium, aluminum magnesium alloy, straight tube is carried out bend pipe at normal temperatures, and preforming is able to the part basically identical with reinforced pipe net shape; The material of described straight tube is micro alloyed steel, dual phase steel or multi-phase Steels;
(4) part after step (3) preforming is carried out hydraulic forming by compression machine in a mold, detailed process is: mould is closed under compression machine drives, the water system of compression machine carries out water filling to the inner chamber of the tubular member after preform, makes the inner chamber of part be full of water; Axial cylinder moves to part and is sealed by part, and inject high pressure water to inner cavity of component, under the effect of high pressure water, workpiece deformation, until fit with the forming surface of mould, obtains the shape of required reinforced pipe simultaneously; The internal pressure of described high pressure water is 5 ~ 250MPa, and axial cylinder thrust is 5 ~ 100 tons;
(5) the reinforced pipe weld together that B post main body step (2) Heat forming obtained and step (4) hydraulic forming obtain, obtains described B post.
The present invention has the following advantages: (1) reinforced pipe adopts Hydroform process, and have weight-saving advantage, namely the intensity of product is higher, and weight is light all the better; (2) stress is concentrated little: relative to conventional ones technique, i.e. the technique that punching press two panels part is welded together again, uses Hydroform process according to the flexible varied cross section design of the situation of B post main body, to make the load in each cross section more even; (3) size quality is higher: because when Hydroform process is shaped, internal pressure is very high, workpiece plastic deformation process compressive stress state, and non-traditional from the drawing of Sheet Metal Forming Technology, press two kinds of state ofs stress, so more easily produce part resilience, the dimensional accuracy of part is thus higher.
Accompanying drawing explanation
Fig. 1 is the structural representation of B post of the present invention.
Fig. 2 is the schematic diagram of institute's reinforced pipe.
Detailed description of the invention
Below in conjunction with concrete accompanying drawing, the invention will be further described.
As shown in Fig. 1 ~ Fig. 2: as described in B post comprise upper fixed part 1, lower fixed part 2, B post main body 3, first thickness area 4, second thickness area 5, the 3rd thickness area 6, reinforced pipe 7 etc.
As shown in Figure 1 and Figure 2, the present invention includes B post main body 3, B post main body 3 top is bottom upper fixed part 1, the B post main body 3 fixing with roof be the lower fixed part 2 fixed with threshold; The top of described B post main body 3 is the first thickness area 4, and bottom is the second thickness area 5, and middle part is the 3rd thickness area 6; The thickness of described first thickness area 4 and the second thickness area 5 is 1.2 mm, and the thickness of the 3rd thickness area 6 is 1.7 mm; The height of described first thickness area 4 and the second thickness area 5 accounts for 1/4 ~ 1/3 of B post main body 3 height respectively; Arrange reinforced pipe 7 at described 3rd thickness area 6, reinforced pipe 7 is hollow tube, is obtained by Hydroform process;
The thickness of pipe of described reinforced pipe 7 is 1.8mm ± 30%.
The manufacture method of described B post, comprises the following steps:
(1) laser assembly solder is adopted to obtain the blank of the B post main body with the first thickness area, the second thickness area and the 3rd thickness area, the blank of B post main body is heated to 850 ~ 940 DEG C in heating furnace, make it be converted into austenite structure, the blank of described B post main body adopts 22MnB5(to be commonly called as boron steel);
(2) blank of the B post main body after austenitizing is carried out Heat forming in mould, and quench simultaneously; Wherein, the thickness of the first thickness area 4 and the second thickness area 5 is 1.2 mm, and the thickness of the 3rd thickness area 6 is 1.7 mm;
(3) selection material is the straight tube of dead-soft steel, corrosion-resistant steel, aluminium, aluminum magnesium alloy, straight tube is carried out bend pipe at normal temperatures, and preforming is able to the part basically identical with reinforced pipe net shape; The material of described straight tube is micro alloyed steel (as SM355MC), dual phase steel (as DP800) or multi-phase Steels;
(4) part after step (3) preforming is carried out hydraulic forming by compression machine in a mold, detailed process is: mould is closed under compression machine drives, the water system of compression machine carries out water filling to the inner chamber of the tubular member after preform, makes the inner chamber of part be full of water; Axial cylinder moves to part and is sealed by part, and inject high pressure water to inner cavity of component, under the effect of high pressure water, workpiece deformation, until fit with the forming surface of mould, obtains the shape of required reinforced pipe simultaneously; The internal pressure of described high pressure water is 5 ~ 250MPa, and axial cylinder thrust is 5 ~ 100 tons;
(5) the reinforced pipe weld together that B post main body step (2) Heat forming obtained and step (4) hydraulic forming obtain, obtains described B post.
Reinforced pipe of the present invention adopts interior empty pipe fitting to carry out hydraulic forming and obtains, and B post main body is obtained by hot forming, has following effect: (1) reinforced pipe adopts Hydroform process, and have weight-saving advantage, namely the intensity of product is higher, and weight is light all the better; (2) stress is concentrated little: relative to conventional ones technique, i.e. the technique that punching press two panels part is welded together again, uses Hydroform process according to the flexible varied cross section design of the situation of B post main body, to make the load in each cross section more even; (3) size quality is higher: because when Hydroform process is shaped, internal pressure is very high, workpiece plastic deformation process compressive stress state, and non-traditional from the drawing of Sheet Metal Forming Technology, press two kinds of state ofs stress, so more easily produce part resilience, the dimensional accuracy of part is thus higher; (4) when colliding, the B post that this kind of method obtains effectively can ensure that driver head region is indeformable, and B post bottom due to intensity weak, distortion reaches the object of energy-absorbing, therefore can protect driver safety preferably.
Claims (3)
1. a B post, comprises B post main body (3), and B post main body (3) top is the upper fixed part (1) fixing with roof, and B post main body (3) bottom is the lower fixed part (2) fixing with threshold; It is characterized in that: the top of described B post main body (3) is the first thickness area (4), and bottom is the second thickness area (5), middle part is the 3rd thickness area (6); The thickness of described first thickness area (4) and the second thickness area (5) is 1.2 mm, and the thickness of the 3rd thickness area (6) is 1.7 mm; The height of described first thickness area (4) and the second thickness area (5) accounts for 1/4 ~ 1/3 of B post main body (3) height respectively; Arrange reinforced pipe (7) at described 3rd thickness area (6), reinforced pipe (7) is hollow tube, is obtained by Hydroform process.
2. B post as claimed in claim 1, is characterized in that: the thickness of pipe of described reinforced pipe (7) is 1.8mm ± 30%.
3. a manufacture method for B post, is characterized in that, comprises the following steps:
(1) laser assembly solder is adopted to obtain the blank of the B post main body with the first thickness area, the second thickness area and the 3rd thickness area, the blank of B post main body is heated to 850 ~ 940 DEG C in heating furnace, make it be converted into austenite structure, the blank of described B post main body adopts 22MnB5;
(2) blank of the B post main body after austenitizing is carried out Heat forming in mould, and quench simultaneously; Wherein, the thickness of the first thickness area (4) and the second thickness area (5) is 1.2 mm, and the thickness of the 3rd thickness area (6) is 1.7 mm;
(3) selection material is the straight tube of dead-soft steel, corrosion-resistant steel, aluminium, aluminum magnesium alloy, straight tube is carried out bend pipe at normal temperatures, and preforming is able to the part basically identical with reinforced pipe net shape; The material of described straight tube is micro alloyed steel, dual phase steel or multi-phase Steels;
(4) part after step (3) preforming is carried out hydraulic forming by compression machine in a mold, detailed process is: mould is closed under compression machine drives, the water system of compression machine carries out water filling to the inner chamber of the tubular member after preform, makes the inner chamber of part be full of water; Axial cylinder moves to part and is sealed by part, and inject high pressure water to inner cavity of component, under the effect of high pressure water, workpiece deformation, until fit with the forming surface of mould, obtains the shape of required reinforced pipe simultaneously; The internal pressure of described high pressure water is 5 ~ 250MPa, and axial cylinder thrust is 5 ~ 100 tons;
(5) the reinforced pipe weld together that B post main body step (2) Heat forming obtained and step (4) hydraulic forming obtain, obtains described B post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410785277.XA CN104527807A (en) | 2014-12-17 | 2014-12-17 | Column B and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410785277.XA CN104527807A (en) | 2014-12-17 | 2014-12-17 | Column B and manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104527807A true CN104527807A (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410785277.XA Pending CN104527807A (en) | 2014-12-17 | 2014-12-17 | Column B and manufacturing method |
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| Country | Link |
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| CN (1) | CN104527807A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109475915A (en) * | 2016-07-13 | 2019-03-15 | 新日铁住金株式会社 | Hot stamped product, structural member using the same, and manufacturing method of hot stamped product |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132938A (en) * | 2005-03-02 | 2008-02-27 | 住友金属工业株式会社 | car body reinforcement |
| CN101219451A (en) * | 2008-01-25 | 2008-07-16 | 哈尔滨工业大学 | Forming method of long tube part with local convex shape |
| US20090250967A1 (en) * | 2006-08-25 | 2009-10-08 | Hans Bodin | Method of hot-stamping and hardening an object from a metal sheet, and a b-pillar for a vehicle |
| JP2009274590A (en) * | 2008-05-14 | 2009-11-26 | Nippon Steel Corp | Center pillar reinforcing member and its manufacturing method |
| CN101861265A (en) * | 2007-11-15 | 2010-10-13 | 耶斯塔姆普硬技术股份公司 | A B-pillar for a vehicle |
| CN203255254U (en) * | 2013-05-13 | 2013-10-30 | 北京汽车股份有限公司 | Vehicle B pillar reinforcing plate, vehicle B pillar and vehicle |
| CN203358695U (en) * | 2013-06-14 | 2013-12-25 | 上汽通用五菱汽车股份有限公司 | Column-B reinforcing plate structure |
-
2014
- 2014-12-17 CN CN201410785277.XA patent/CN104527807A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132938A (en) * | 2005-03-02 | 2008-02-27 | 住友金属工业株式会社 | car body reinforcement |
| US20090250967A1 (en) * | 2006-08-25 | 2009-10-08 | Hans Bodin | Method of hot-stamping and hardening an object from a metal sheet, and a b-pillar for a vehicle |
| CN101861265A (en) * | 2007-11-15 | 2010-10-13 | 耶斯塔姆普硬技术股份公司 | A B-pillar for a vehicle |
| CN101219451A (en) * | 2008-01-25 | 2008-07-16 | 哈尔滨工业大学 | Forming method of long tube part with local convex shape |
| JP2009274590A (en) * | 2008-05-14 | 2009-11-26 | Nippon Steel Corp | Center pillar reinforcing member and its manufacturing method |
| CN203255254U (en) * | 2013-05-13 | 2013-10-30 | 北京汽车股份有限公司 | Vehicle B pillar reinforcing plate, vehicle B pillar and vehicle |
| CN203358695U (en) * | 2013-06-14 | 2013-12-25 | 上汽通用五菱汽车股份有限公司 | Column-B reinforcing plate structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109475915A (en) * | 2016-07-13 | 2019-03-15 | 新日铁住金株式会社 | Hot stamped product, structural member using the same, and manufacturing method of hot stamped product |
| CN109475915B (en) * | 2016-07-13 | 2021-05-11 | 日本制铁株式会社 | Hot stamped product, structural member using the same, and manufacturing method of hot stamped product |
| US11027781B2 (en) | 2016-07-13 | 2021-06-08 | Nippon Steel Corporation | Hot-stamping formed article, structural member using the same, and manufacturing method of hot-stamping formed article |
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| C10 | Entry into substantive examination | ||
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Application publication date: 20150422 |
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| RJ01 | Rejection of invention patent application after publication |