CN109433960A - Drop stamping high-strength steel automobile body covering piece and its manufacturing method, manufacture system - Google Patents
Drop stamping high-strength steel automobile body covering piece and its manufacturing method, manufacture system Download PDFInfo
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- CN109433960A CN109433960A CN201811155690.2A CN201811155690A CN109433960A CN 109433960 A CN109433960 A CN 109433960A CN 201811155690 A CN201811155690 A CN 201811155690A CN 109433960 A CN109433960 A CN 109433960A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention discloses a kind of drop stamping high-strength steel automobile body covering piece and its manufacturing method, manufacture system, this method includes being cut out to martensitic stainless steel, and the martensitic stainless steel is cold rolled annealed pickling state；The plate cut out is put into heating device to heat and reaches austenitic state and keeps the temperature；Plate after heating is placed into the mold of press and is pressed；Plate pressure maintaining and cooling in mold after the completion of compacting after being removed from the molds, is finally surface-treated when the material structure of plate is changed into martensite.The present invention uses martensite stainless steel material, the outer covering piece of body of a motor car is obtained by hot press-formed, since yield strength is very high, more foreign body Impact energies can be absorbed in excellent elasticity, obtain fabulous dent resistance energy, it can also carry out being thinned for product thickness, since the corrosion resistance of stainless steel itself is good, do not need to carry out material surface zinc-plated processing, and vehicle exterior cladding element carries out.
Description
Technical field
The present invention relates to automobile manufacturing field, in particular to a kind of drop stamping high-strength steel automobile body covering piece and its manufacture
Method, manufacture system.
Background technique
In current body of a motor car outer covering piece product, the overwhelming majority is using the carbon steel with deep drawability, or has
The low-alloy steel of baking and hardening performance or cold-rolled steel sheet with zinc coat.Coverage forming manufacturing process is also traditional cold punching
Pressure technique.The thickness of most of body outer panels in 0.65-0.8mm or so, tensile strength generally 300MPa-400MPa it
Between.By the requirement of body outer panel performance, it is desirable that covering has certain anti-pit ability.Also, vehicle exterior cladding element
By plating, primer spray, middle paint, finishing coat, original metal-like is masked completely, by automotive light weight technology and resists recessed ability, outside
It sees and requires, the performance of conventional body of a motor car outer covering piece is increasingly difficult to meet demand.
Summary of the invention
The present invention provides manufacturing method, the manufacture system of a kind of drop stamping high-strength steel automobile body covering piece, existing to solve
There is above-mentioned technical problem present in technology.
In order to solve the above technical problems, the present invention provides a kind of manufacturer of drop stamping high-strength steel automobile body covering piece
Method, comprising: plate is cut from martensitic stainless steel, wherein the martensitic stainless steel is by cold rolled annealed pickling
Reason, the martensitic stainless steel with a thickness of 0.3-0.7mm；The plate cut out is heated, is in the plate
It is kept the temperature after austenitic state, wherein the maximum temperature of heating and/or heat preservation is 950 DEG C~1100 DEG C；By the plate after heat preservation
Material, which is placed into mold, to be pressed；Pressure maintaining and cooling are carried out in mold to the plate after the completion of compacting, until plate
Material structure be changed into martensite；The plate for becoming martensite is taken out, bound edge is carried out to outer covering piece plate and internal covering part
Pressing, then outer covering piece assembly carries out the surface treatment such as electrobrightening, plating, electrophoresis, spraying
Preferably, step " plate after heat preservation is placed into mold and is pressed " includes: after taking out heat preservation
Plate and the plate of taking-up is pressed, wherein plate after taking out heat preservation and the thermal insulation material of taking-up is carried out
The total duration of compression moulding is not more than 25 seconds.
Preferably, the plate is 4-20 seconds from the time for being put into mold is fetched into；Plate is from mold is put into mold
The time for starting compacting is 1-2 seconds；Be pressed into since mold mold be pressed into bottom time be 1-3 seconds
Preferably, the dwell time of the plate after the completion of compacting is 1-10 seconds.
Preferably, a kind of manufacturing method of drop stamping high-strength steel automobile body covering piece, which is characterized in that product is in warm
The approximate right angle bending and forming in border flange region is completed in forming technology.
Preferably, include: that preamble processing is carried out to the martensitic stainless steel face before cutting plate, it is described
Preamble processing includes one of mirror finish, wire drawing and frosted processing or a variety of.
Preferably, " being heated to the plate cut out, after reaching the plate and being in austenitic state in step
Plate is kept the temperature, wherein the maximum temperature of heating is 950 DEG C~1100 DEG C " in, including, the plate is in reproducibility gas
It is heated and/or is kept the temperature in atmosphere or vacuum environment, it is preferable that the heating temperature of the plate under vacuum conditions is at 700 DEG C
When above, the vacuum degree of the vacuum environment is less than 100Par.
Preferably, the component and weight percent content of the martensite stainless steel material are as follows: C:0.05%-0.4%,
Si:0.5%-1.5%, Mn:0.5%-1.5%, Cr:10%-15%, Ni: < 1%, remaining is iron and microelement；Preferably,
The microelement is Nb:0.1%-1%, Mo:0.1%-1%, V:0.1%-1%, N:0.01%-0.1%.
The present invention also provides a kind of manufacture systems of drop stamping high-strength steel automobile body covering piece, comprising: cuts out mechanism, institute
It states and cuts out mechanism for cutting plate from martensitic stainless steel；Temperature control equipment, the temperature control equipment for pair
The plate cut out is heated, and is kept the temperature after reaching the plate and being in austenitic state to plate, wherein heating
Maximum temperature is 950 DEG C~1100 DEG C；Press with mold, the mold is for being pressed into the plate after heat preservation
Type.Laser Wrapping apparatus carries out bound edge pressing to outer covering piece and inner panel.Surface processing equipment, to automobile body covering piece
It is polished, electrophoresis, spraying
The present invention also provides a kind of drop stamping high-strength steel automobile body covering pieces, manufacture shape using the manufacturing method
At.
Compared with prior art, the invention has the following advantages that
1, outer covering piece of the invention carries out heat stamping and shaping manufacture using martensitic stain less steel, and tensile strength is more than
1000Mpa belongs to super-high strength steel；
2, traditional martensitic stain less steel room-temperature mechanical property is high, and elongation percentage is low, is not suitable for punch forming, but through overheating
Martensitic stain less steel is heated to austenitic temperature by moulding process, and processability is excellent, and cools tissue is transformed into martensite group
It knits, mechanical performance is excellent；
3, since the tensile strength of martensitic stain less steel is more than 1000Mpa, and traditional galvanized sheet ability 300Mpa, tradition plating
Zine plate exterior panel thickness is generally in 0.7mm, and the material of 0.3-0.7mm left and right thickness may be used in martensitic stainless steel, vapour
The weight of vehicle body outer skin can mitigate 30% or more.
4, automobile body covering piece is easy by recess is hit, and using martensitic stain less steel, intensity and hardness are higher, resist recessed
Property is stronger.
5, martensitic stain less steel is easy to be polished to mirror surface, and appearance is more beautiful after surface treatment.
Detailed description of the invention
Fig. 1 is the manufacturing method flow chart of drop stamping high-strength steel automobile body covering piece of the invention；
Fig. 2 is the structural schematic diagram of monoblock type door panel in the embodiment of the present invention 1 and 2；
Fig. 3 is the angle the R partial enlarged view of monoblock type door panel in Fig. 2；
Fig. 4 is the pre- flange schematic diagram of the monoblock type door panel in the embodiment of the present invention 1 and 2；
Fig. 5 is that the bound edge of the monoblock type door panel in the embodiment of the present invention 1 and 2 presses schematic diagram.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.It should be noted that attached drawing of the present invention is all made of simplified form and uses non-essence
Quasi- ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
Referring to Fig.1, the present invention provides a kind of manufacturing method of drop stamping high-strength steel automobile body covering piece, comprising:
Martensitic stainless steel is cut out, plate to be pressed is obtained, wherein the martensitic stainless steel passes through
Cold-rolling treatment passes through cold rolled annealed pickling processes, with a thickness of 0.3-0.7mm, preferably 0.4-0.55mm, so that Automobile
The weight of body covering is mitigated significantly.Further, before cutting plate, the martensitic stainless steel face is carried out
Preamble processing, the preamble processing include one of mirror finish, wire drawing and frosted processing or a variety of.
Specifically, the component and weight percent content of the martensite stainless steel material are as follows: C:0.05%-0.4%,
Si:0.5%-1.5%, Mn:0.5%-1.5%, Cr:10%-15%, Ni: < 1%, remaining is iron.Preferably 0Cr13,
1Cr13,2Cr13,3Cr13.Further, can on the basis of above-mentioned martensitic stain less steel add microelement Nb, Mo, V,
N, preferably Nb:0.1%-1%, Mo:0.1%-1%, V:0.1%-1%, N:0.01%-0.1%.Above-mentioned martensitic stain less steel
The martensite start temperature of material is usually 100-300 DEG C, 200 DEG C of average out to, therefore martensite stainless steel material heat at
During type, 300 DEG C will not be quickly fallen to hereinafter, therefore will not press to martensitic stainless steel temperature decline
Just there is martensite transfor mation before system, ensure that the forming property of plate.
Then, the plate cut out is heated, plate is carried out after reaching the plate and being in austenitic state
Heat preservation, wherein the maximum temperature of heating is 950 DEG C~1100 DEG C.Specifically, the plate cut out is put into heating device and is added
Heat reaches austenitic state and keeps the temperature, and homogenizes the austenite in plate, since plate is very thin, therefore when needing very short heat preservation
Between can realize, the soaking time of the present embodiment is preferably 1min or so.Specifically, by plate be placed in heating device into
Row heat treatment, also, plate enter heating device before, in the mold flanging region double-face spray painting lubricant of plate, plate
After being placed into heating device, the inside of the heating device avoids plate for reducing atmosphere or vacuum environment to protect plate
What material was oxidized in the hot environment of heating device.Certainly, the plate can be preheated under air environment, but
The maximum temperature heated under air environment be no more than 700 DEG C, the temperature that plate heats under vacuum conditions at 700 DEG C or more,
Vacuum degree will be controlled in 100Par~0.1Par or vacuum degree more higher than 0.1Par.
Further, the maximum temperature of the plate heated in heating device be 950 DEG C~1100 DEG C, preferably 1020 DEG C-
1050℃.The maximum temperature of heating device is 1020 DEG C -1200 DEG C, preferably 1050 DEG C.
Then, the plate after heating is placed into mold and is pressed；Specifically, the plate is from heating device
Middle taking-up, and the plate from heating device be transferred to the time in mold be 4-20 seconds, preferably 6 seconds.Plate is from being put into
Mold to mold start compacting time be 1-2 seconds, preferably 1 second.It is pressed into mold since mold and is pressed into bottom (i.e. mold
Molding) time be 1-3 seconds, preferably 1 second.Whole process is no more than 25 seconds, it is ensured that plate may remain in higher
Temperature, and then guarantee is provided for its molding.
Plate after the completion of compacting pressure maintaining 1-10 seconds and is cooled to close to room temperature in mold, when the material structure of plate turns
When becoming martensite, it is removed from the molds.In other words, the present invention is by the martensitic stain less steel heating transformation of Annealed microstructure
To austenite, is formed when keeping austenite state and continue to cool down in mold after during pressure maintaining, to make
Austenite structure is obtained to be changed into high-intensitive martensitic structure, tensile strength 800MPa-1700MPa, extension of having no progeny
Rate is 6%-15%.
Laser trimming is carried out to the plate of taking-up using laser, naturally it is also possible to while carrying out thermoforming in mold into
Row trimming.Further, plate also completes pre- flange operation, i.e. approximate right angle bending and forming in hot forming, and bending line is with after
The bound edge line of sequence is overlapped.
Then, the product after trimming is polished, to manufacture the mirror effect of outer surface.
Local heating first is carried out to the flange region of plate, heating means can use induction heating, laser heating or fire
Flame heating, then plate and internal covering part are subjected to bound edge pressing.
Finally, for the assembly product after interior outer covering piece bound edge, outer surface processing is carried out, the surface treatment can be used
Electrolysis, plating, electrophoresis, spraying and laser treatment.
The present invention also provides a kind of manufacture systems of automobile body covering piece, comprising: mechanism is cut out, it is described to cut out mechanism use
In cutting plate from martensitic stainless steel；Temperature control equipment, the temperature control equipment are used for the plate cut out
It is heated, plate is kept the temperature after reaching the plate and being in austenitic state, wherein the maximum temperature of heating is
950 DEG C~1100 DEG C；Press with mold, the mold is for being pressed the plate after heat preservation.
Below with reference to embodiment, the present invention will be described in detail:
Embodiment 1
The part prepared needed for the present embodiment is monoblock type door panel 100, and structure is as shown in Figs. 1-2.
Firstly, using the 3Cr13 martensitic stainless steel with a thickness of 0.55mm and Jing Guo cold rolled annealed pickling processes, geneva
230 DEG C of body transition temperature, contained composition includes C:0.32%, Si:0.3%, Mn:0.3%, Cr:13%, Ni:0.6%；
Then, the plate cut out is put into and carries out being heated to 1050 DEG C in heating furnace, and keep the temperature 1min；
Then, plate is put into mold and is suppressed, be transferred to the time 6s in mold from heating furnace after plate heating,
Plate be put into mold to the time that mold starts compacting be 1s, it is 1s that mold, which starts to be pressed into mold to be pressed into the time at bottom,；
Then, the plate of the completion pressure maintaining 6s in mold is suppressed, cooling close to room temperature to plate, material structure is changed into horse
It is taken out out of mold when family name's body；
Then, the mirror effect of polishing manufacture outer surface is carried out after punching press to part；
Then, flange region is heated using laser heating method, then press with the bound edge of internal covering part, packet
Side bonding processes schematic diagram is as shown in Figure 3, Figure 4；
Then, for the assembly product after interior outer covering piece bound edge, transparent color electrophoretic process is carried out；
Embodiment 2
The part prepared needed for the present embodiment is similarly monoblock type door panel 100, and structure is as shown in Figs. 1-2.
Firstly, using the martensitic stainless steel with a thickness of 0.5mm and Jing Guo cold rolled annealed pickling processes, martensite transfor mation
280 DEG C of temperature, contained composition includes C:0.06%, Si:0.3%, Mn:1.1%, Cr:12%, Ni:0.6%, Nb:0.5%,；
Then, the plate cut out is put into and carries out being heated to 1050 DEG C in heating furnace, and keep the temperature 1min；
Then, plate is put into the mold of press and is suppressed, is transferred in mold after plate heating from heating furnace
Time 6s, plate are put into mold and start the time of compacting to mold as 1s, and mold starts to be pressed into the time that mold is pressed into bottom
For 1s；
Then, suppress the plate of the completion pressure maintaining 6s in mold, when plate it is cooling close to room temperature when take out out of mold；
Then, flange region is heated using laser heating method, then press with the bound edge of internal covering part, packet
Side bonding processes schematic diagram is as shown in Figure 3, Figure 4；
Then, it for the assembly product after interior outer covering piece bound edge, carries out electrobrightening and transparent color applies plating.
In conclusion the present invention is passing through high-temperature heating using martensitic stain less steel, former Annealed microstructure is changed into Austria
After family name's body, more than martensite start temperature (about 220 DEG C), all there is the forming property for being much better than martensitic structure.It is difficult to understand
Family name's body material is stamping in the progress of this temperature region, can obtain the forming effect excellent for complicated shape.It is shaping
After, by continuing to cool down in mold during pressure maintaining, austenite structure is changed into high-intensitive martensitic structure.Horse
The relatively low martensite start temperature of family name's body stainless steel and the wide cooling velocity range of martensitic stain less steel, all make
Obtaining it becomes hot press-formed material of an excellent thin plate.Using martensite stainless steel material, by hot press-formed next
The outer covering piece for obtaining body of a motor car can carry out being thinned for product thickness, be thinned by 0.65mm-0.8mm since intensity is very high
To 0.4mm-0.55mm, loss of weight is more than 30%.Anti- pit experiments have shown that, the pit of the drop stamping martensitic stain less steel of 0.55mm thickness
Resistivity is more than 0.7mm baking hardening plate.Since the corrosion resistance of stainless steel itself is good, do not need to carry out surface to material
Zinc-plated processing.In addition, playing good landscaping effect to the appearance of vehicle body since stainless steel is easily done mirror effect.
Obviously, those skilled in the art can carry out various modification and variations without departing from spirit of the invention to invention
And range.If in this way, these modifications and changes of the present invention belong to the claims in the present invention and its equivalent technologies range it
Interior, then the invention is also intended to include including these modification and variations.
Claims (10)
1. a kind of manufacturing method of drop stamping high-strength steel automobile body covering piece, which comprises the following steps:
Plate is cut from martensitic stainless steel, wherein the martensitic stainless steel passes through cold rolled annealed pickling processes, institute
State martensitic stainless steel with a thickness of 0.3-0.7mm；
The plate cut out is heated, is kept the temperature after the plate is in austenitic state, wherein heating and/or
The maximum temperature of heat preservation is 950 DEG C~1100 DEG C；
Plate after heat preservation is placed into mold and is pressed；
Pressure maintaining and cooling are carried out in mold to the plate after the completion of compacting, until the material structure of plate is changed into martensite；
Take out the plate for becoming martensite；
The plate of taking-up is polished, bound edge presses and surface treatment.
2. a kind of manufacturing method of drop stamping high-strength steel automobile body covering piece as described in claim 1, which is characterized in that step
Suddenly " plate after heat preservation is placed into mold and is pressed " includes: the plate after taking out heat preservation and the plate to taking-up
It is pressed, wherein the total duration taken out the plate after keeping the temperature and the thermal insulation material of taking-up is pressed is little
In 25 seconds.
3. a kind of manufacturing method of drop stamping high-strength steel automobile body covering piece as claimed in claim 2, which is characterized in that institute
It is 4-20 seconds that plate, which is stated, from the time for being put into mold is fetched into；The time that since plate suppressed being put into mold to mold is 1-2
Second；Be pressed into since mold mold be pressed into bottom time be 1-3 seconds.
4. a kind of manufacturing method of drop stamping high-strength steel automobile body covering piece as described in claim 1, which is characterized in that pressure
The dwell time of plate after the completion of system is 1-10 seconds.
5. a kind of manufacturing method of drop stamping high-strength steel automobile body covering piece as described in claim 1, which is characterized in that packet
It includes: before cutting plate, preamble processing being carried out to the martensitic stainless steel face, the preamble processing includes that mirror surface is thrown
One of light, wire drawing and frosted processing are a variety of.
6. a kind of manufacturing method of drop stamping high-strength steel automobile body covering piece as described in claim 1, which is characterized in that
Step " plate cut out is heated, plate is kept the temperature after reaching the plate and being in austenitic state,
In, the maximum temperature of heating and/or heat preservation is 950 DEG C~1100 DEG C " in, including, the plate is in reducing atmosphere or vacuum
It is heated and/or is kept the temperature in environment, it is preferable that the heating temperature of the plate under vacuum conditions is at 700 DEG C or more, institute
The vacuum degree for stating vacuum environment is less than 100Par.
7. a kind of manufacturing method of drop stamping high-strength steel automobile body covering piece as described in claim 1, which is characterized in that step
Suddenly " plate of taking-up is polished, bound edge presses and surface treatment " and is specifically included:
While plate carries out thermoforming in a mold, pre- flange operation is completed；
Trimming processing is carried out using plate of the mold to thermoforming, or the plate being removed from the molds is cut using laser
Side processing；
Plate after trimming is polished, to manufacture the mirror effect of outer surface；
Local heating is carried out to the flange region of plate, heating means use induction heating, laser heating or flame heating；
Then, the bound edge of plate and internal covering part is pressed；
Finally, to the assembly product after the completion of bound edge, carry out outer surface processing, the surface treatment is electrolysis, plating, electrophoresis,
One of spraying and laser treatment are a variety of.
8. a kind of manufacturing method of drop stamping high-strength steel automobile body covering piece as described in claim 1, which is characterized in that institute
State the component and weight percent content of martensite stainless steel material are as follows: C:0.05%-0.4%, Si:0.5%-1.5%, Mn:
0.5%-1.5%, Cr:10%-15%, Ni: < 1%, remaining is iron and microelement；Preferably, the microelement is Nb:
0.1%-1%, Mo:0.1%-1%, V:0.1%-1%, N:0.01%-0.1%.
9. a kind of manufacture system of drop stamping high-strength steel automobile body covering piece characterized by comprising
Mechanism is cut out, the mechanism of cutting out from martensitic stainless steel for cutting plate；
Temperature control equipment, the temperature control equipment are reaching at the plate for heating to the plate cut out
Plate is kept the temperature after austenitic state, wherein the maximum temperature of heating is 950 DEG C~1100 DEG C；
Press with mold, the mold is for being pressed the plate after heat preservation；
Laser taping machine carries out bound edge pressing to outer covering piece and inner panel；
And
Surface processing equipment polishes automobile body covering piece, is electrolysed, in plating, electrophoresis, spraying and laser treatment
One or more operations.
10. a kind of drop stamping high-strength steel automobile body covering piece, using the manufacturer as described in claim 1~8 any one
Legal system appearance at.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811155690.2A CN109433960A (en) | 2018-09-30 | 2018-09-30 | Drop stamping high-strength steel automobile body covering piece and its manufacturing method, manufacture system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811155690.2A CN109433960A (en) | 2018-09-30 | 2018-09-30 | Drop stamping high-strength steel automobile body covering piece and its manufacturing method, manufacture system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109433960A true CN109433960A (en) | 2019-03-08 |
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| CN201811155690.2A Pending CN109433960A (en) | 2018-09-30 | 2018-09-30 | Drop stamping high-strength steel automobile body covering piece and its manufacturing method, manufacture system |
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| CN114226589B (en) * | 2021-12-23 | 2023-11-17 | 扬州康迪科技有限公司 | Stamping process for sheet metal of automobile body panel |
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