CN102756251B - High-strength steel plate hot-stamping molding production line and production process thereof - Google Patents
High-strength steel plate hot-stamping molding production line and production process thereof Download PDFInfo
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- CN102756251B CN102756251B CN201210283191.8A CN201210283191A CN102756251B CN 102756251 B CN102756251 B CN 102756251B CN 201210283191 A CN201210283191 A CN 201210283191A CN 102756251 B CN102756251 B CN 102756251B
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Abstract
The invention relates to a high-strength steel plate hot-stamping molding production line and production process thereof. The high-strength steel plate hot-stamping molding production line is mainly composed of a 2.6*1800 mm coil feed line unit, a blanking stacking unit, a stack breaking target hitting unit, a 20m heating furnace unit, a fast loading unit, a 800t pressing unit, a fast blanking unit, a 1000*1800mm laser cutting unit and a 1200*2000mm shot blasting fat liquoring. Each unit has a programmable logic controller (PLC) control system, and the PLC control system of each unit is connected with a production line main station PLC control system through a PROFIBUS industrial bus. The production process includes uncoiling, blanking, pre-molding, breaking stacks, detecting double sheets, centering and entering the furnace, heating austenite evenly, taking out from the furnace fast, feeding materials to a pressing machine, stamping and quenching, blanking, cutting and liquoring fat. The high-strength steel plate hot-stamping molding production line and the production process has the advantages of optimizing configuration and automation of the production line, improving production efficiency, and enlarging an application range of the production line.
Description
Technical field
The present invention relates to hot press-formed equipment and technical field of producing, specifically the hot press-formed production line of a kind of high-strength steel sheet and production technology thereof.
Background technology
Along with social development, automotive safety is comfortable to be also more and more taken seriously with energy-conserving and environment-protective problem, improves the security performance of automobile, and the fuel consumption, minimizing CO2 and the toxic emission that reduce automobile become the requirement of society to automobile industry.Adopting the hot press-formed technology of high strength steel plate is effective ways.
Heat forming technology is to austenitic temperature scope (880 ℃-950 ℃) by high strength steel board heating, make it even austenitizing, then send into fast in the inner mould with cooling system, punch forming fast, pressurize quench cooled, change austenite into martensite, obtain superhigh intensity stamping parts.
Automobile has coated plate with high strength steel plate and without two kinds of forms of coated plate.Domestic can only production without coating high strength steel plate, at high temperature oxidizable without coated plate at present, affects product quality.And adopting the coated plate must be from external import, cost is high, the cycle is long, and coating can stick on heating furnace roller rod in high temperature, affects production line use.
The method for hot forming of a kind of high-strength steel plate stamping part of application number 200910067375.9 patent of invention; comprise blanking; heating, preliminary temperature drop; be shaped, quench; postprocessing working procedures; it is characterized in that: after described method for hot forming steel plate is heated to complete austenitizing in heating furnace; in the situation that not contacting with air; transferred in a preliminary cooling chamber that has a gas shield atmosphere and be cooled to 600 ℃; cooling velocity in this preliminary cooling chamber is greater than 35 ℃/S, and then transfers to shaping in hot stamping forming die and quench.This patent has just simply proposed a kind of method of high-strength steel sheet drop stamping, concrete processing object and equipment composition are not explicitly pointed out, it brings forward a kind of solution without the measure that prevents under coating high-strength steel sheet high temperature that oxidation shaping from quenching, but its light plate is not touched and in nitrogen cooling chamber, implements that difficulty is large and gas cooled effect is poor with air by heating furnace, after being cooled to 600 ℃, moving into die forming quenches again, forming effect is also not as more than 800 ℃ being shaped and quenching, whole process quenching technical is discontinuous, is difficult to obtain uniform martensitic structure.
Application number 200910187794.6 patent of invention punching presses are quenched with steel plate and thermoforming process thereof, disclosing a kind of punching press quenches with steel plate and has proposed thermoforming process and be: steel plate after shearing blanking Ac3～Ac3+80 ℃ of heating, carry out austenitizing, in heating furnace, after insulation in 5～10 minutes, be transferred at once in the logical water-cooled metal die in an inside, under the hot conditions of 650～850 ℃, carry out punching press; The workpiece being shaped is cooling in airtight mould, and it is cooling that mould itself relies on water circulation to carry out, and cooling velocity is greater than the martensitic Critical cooling speed of austenitic formation, and temperature when last workpiece leaves drop stamping production line is below 150 ℃, and air cooling is to room temperature afterwards.This patent has just simply proposed a kind of thermo shaping method equally, concrete processing object and equipment composition is not explicitly pointed out, and in heating, adopt pure hydrogen protection, has potential safety hazard.
For the present situation of above-mentioned technology, the advanced production line of domestic beginning Introduced From Abroad.This production line is mainly made up of coil feed line unit, blanking stacking unit, de-stacking mark unit, heating furnace unit, rapid material-feeding unit, press unit, fast blanking unit, laser cutting unit and ball blast oiling unit, and unit is provided with to PLC control system, has improved the automaticity of unit.But however, need further lifting as the automation control of whole production line, particularly how to optimize effective configuration of the links of automatic assembly line, to realize wider application or problem demanding prompt solution.
Summary of the invention
The object of the invention is the problem existing for prior art, by optimizing the configuration of unit and then improving whole production line configured in one piece and automatization level, and the hot press-formed production line of a kind of high-strength steel sheet and the production technology thereof that propose.It is applied to thickness range 0.8～2.5mm, length range 400～1700mm, width range 50～1000mm without coating high-strength boron steel plate, reach the production requirement of at least 3/min.
Technical scheme of the present invention comprises:
The hot press-formed production line of a kind of high-strength steel sheet, mainly formed by 2.6*1800mm coil feed line unit, blanking stacking unit, de-stacking mark unit, 20m heating furnace unit, rapid material-feeding unit, 800t press unit, fast blanking unit, 1000*1800mm laser cutting unit and 1200*2000mm ball blast oiling unit, there is the PLC control system of oneself each unit, it is characterized in that: coil feed line unit mainly by uncoiler, draw material machine, levelling machine, measurement mechanism and conveyer and form; Blanking buttress material unit is mainly made up of blanking stamping machine, preformed stamping machine, buttress material machine, dumper; De-stacking mark unit is mainly made up of de-stacking manipulator, mark platform; Roller hearth type heating furnace unit is mainly made up of furnace entry table, roller hearth type heating furnace, alignment table and tablet jacking system, and wherein alignment table forms middle finger by two groups 12; Rapid material-feeding unit is made up of two manipulators; Press unit is mainly made up of high speed press, mould, temperature measuring equipment; Fast blanking unit is made up of two manipulators; Laser cutting unit is made up of more than 6 laser cutting machine tool; Ball blast oiling unit is mainly made up of shot-blast apparatus, oiling device; The PLC control system of each unit is connected with the PLC of production line main website control system by PROFIBUS industrial bus.
The de-stacking machinery hand getting of de-stacking mark unit with thering is X, Z axis moves and rotates 3 frees degree around Z axis, mark platform is with double-sheet checkout gear; In roller hearth type heating furnace stove in roller hearth type heating furnace unit, adopt ceramic rod, the width of furnace interior is not less than 2800 mm, and internal height is not less than 100 mm, adopts Electric heating; Two manipulators employings of rapid material-feeding unit have X, Y, Z axis and move three degree of freedom, X, Y-axis translational speed 5000mm/s, and Z axis translational speed 3000mm/s, positioning precision 0.1mm, and this manipulator has blowing mechanism; Total mold clamping force 8000 KN of press of press unit, maximum open height 1800 mm, effective travel 1000 mm, the dwell time can reach 20s, and slide block closing speed is greater than 700mm/s, and slide block opening speed is greater than 500mm/s, mould inside design cooling circuit.
The production technology that the present invention has simultaneously provided the hot press-formed production line of high-strength steel sheet around aforesaid production line is:
(1) high strength steel plate is by the uncoiling of coil feed line unit, cutting, smoothing, and is sent to blanking buttress material unit;
(2) blanking buttress material unit is according to need of production blanking, stacking;
(3) dumper transports tablet to put in place, utilizes sucker to support device tablet is carried to mark platform by de-stacking manipulator, after double-sheet detection is determined, carries out the mark of punching press prefix, and then de-stacking manipulator puts it to entering on the outer roller-way of fire door place stove of heating furnace;
(4) entering outside fire door stove on roller-way, by centering body, tablet is carried out to centering location, then tablet enters in roller hearth type heating furnace, under nitrogen protection condition, tablet is through being heated to 850-950 ℃, after the even austenite of structural transformation, quick tapping, outside plug for outlet stove, on roller-way, again located by centering body quick centring, and by jacking system, the tablet after heating is held up fast;
(5) feeding manipulator has quick and precisely been removed high temperature tablet by high temperature resistant clamper, and quick and precisely puts into after press die, returns fast;
(6) utilize the temperature-detecting device of press, detecting that high temperature tablet is after can punching press scope, press is stamping by tablet fast, and pressurize, within the dwell time, the tablet after being shaped is carried out Quenching Treatment by mould with cooling circuit, makes to organize and change martensite completely into, press quick return;
(7) blanking mechanical hand has quenched punching press fast part takes out, and is sent to laser cutting unit after being cooled to room temperature;
(8) laser cutting machine tool of employing five-axle linkage, carries out trimming, working of the cutting hole to part;
(9) carry out bead with shot-blasting machine, remove surface scale, after cleaning out, carry out oiling or the processing of spraying paint.
The production technology optimization scheme of the hot press-formed production line of aforementioned high-strength steel sheet is: the roller hearth type heating furnace of step (4) roller hearth type heating furnace unit is under 99.99% nitrogen atmosphere protective condition, tablet to be heated to 880～930 ℃ of insulations in purity; Two mechanical arm holder fingers in step (5) adopt high temperature resistant stainless steel material, before tablet enters mould, mold cavity are carried out to automated cleaning; Step (6) the press dwell time is not less than 20s, and slide block closing speed is greater than 700mm/s, and slide block opening speed is greater than 500mm/s, and mould quenches to plate with the cooling rate that is not less than 40 ℃/S.
Technique effect of the present invention is mainly reflected in: the one, optimize configuration and the automaticity of production line, and improve production efficiency; The 2nd, improved the range of application of production line, be applied to thickness range 0.8～2.5mm, length range 400～1700mm, width range 50～1000mm without coating high-strength boron steel plate, reach the production requirement of at least 3/min.
accompanying drawing explanation:
Fig. 1 is that the capital equipment of production line of the present invention forms sketch;
Fig. 2 is a kind of block diagram of technological process.
the specific embodiment:
First by reference to the accompanying drawings 1 pair of production line describes:
The production line of the present embodiment is that coil feed line unit 1, blanking stacking unit 2, de-stacking mark unit 3, heating furnace unit 4, rapid material-feeding unit 5, press unit 6, fast blanking unit 7, laser cutting unit 8 and ball blast oiling unit 9 are optimized to integration.
Wherein: coil feed line unit 1 mainly by uncoiler, draw material machine, levelling machine, measurement mechanism, conveyer etc. and form, complete plate uncoiling, smoothing.
Blanking buttress material unit 2 is mainly made up of blanking stamping machine, preformed stamping machine, buttress material machine, material conveying trolley etc., completes blanking, the buttress material of plate, and completes the preform of complex deformation part.
De-stacking mark unit 3 is mainly made up of de-stacking manipulator, mark platform etc., de-stacking manipulator has X, Z axis moves and rotates 3 frees degree around Z axis, can be supported device and be adjusted the tablet that sucker adapts to different size scope by replacing and move to take, mark platform will have double-sheet checkout gear.Manipulator moves tablet to mark platform position, first carries out double-sheet detection, and the defective scrap basket of putting into qualifiedly carries out mark, after mark completes, tablet is moved to be put into heating furnace and to enter on the outer roller-way of fire door stove.
Roller hearth type heating furnace unit 4 mainly comprises furnace entry table, roller hearth type heating furnace, alignment table and tablet jacking system.Tablet is entered in stove and heats continuously by furnace entry table.In roller hearth type heating furnace stove, adopt ceramic rod, the width of furnace interior is not less than 2800 mm, and internal height is not less than 100 mm, adopts Electric heating, and adopting purity is 99.99% nitrogen atmosphere protection.Tablet is heated to 880～930 ℃ of insulations, makes the even austenitizing of tablet.Tablet after heating is from plug for outlet quick tapping.Alignment table is located the tablet centering of difformity size middle finger by two groups 12, and jacking system quick and stable holds up high temperature tablet.
Rapid material-feeding unit 5 is made up of two manipulators, and possess respectively X, Y, Z axis and move three degree of freedom, X, Y-axis translational speed 5000mm/s, Z axis translational speed 3000mm/s, positioning precision 0.1mm, clamper finger adopts high temperature resistant stainless steel material.Feeding unit material captures high temperature tablet on jacking system, and rapid transport is in press die.Manipulator has purging function, before tablet enters mould, mold cavity is carried out to automated cleaning.
Press unit 6 mainly comprises high speed press, mold system, temperature measuring equipment.Whether temperature measuring equipment detects the next tablet temperature of rapid material-feeding unit transhipment in working range, and the qualified press of detected temperatures carries out stamping press, and detected temperatures is defective, and feeding manipulator takes out tablet to put into ash can fast.Total mold clamping force 8000 kN of press, maximum open height 1800 mm, effective travel 1000 mm, the dwell time can reach 20s, and slide block closing speed is greater than 700mm/s, and slide block opening speed is greater than 500mm/s.Mold materials has good calorific intensity, red hardness, high wearability and fatigue behaviour, and indoor design cooling circuit, guarantees that mould quenches to plate with the cooling rate that is not less than 40 ℃/S.
Fast blanking unit 7 is made up of two manipulators, identical with feeding manipulator, does not have purging function.For the part after hot press-formed is taken out from mould, be transported on conveyer belt.
Laser cutting unit 8 is made up of more than 6 laser cutting machine tool, for completing cut hole, the trimming operation of the part that conveying belt transfers.
Ball blast oiling unit 9 is mainly made up of shot-blast apparatus, oiling device, and for completing the impeller blasting of part, and it is antirust to carry out oiling.
The PLC control system that 9 each unit all have oneself, can realize independent control, but as slave station, realizes the overall automation control of production line by PROFIBUS industrial bus by the PLC of production line main website control system, according to production line job requirement, coil feed line unit and blanking stacking unit complete the stacking of stack pallet according to the productive temp of setting, dumper haul is to de-stacking unit up to standard, position sensor on dumper track sends a signal to control system, de-stacking manipulator is started working, tablet enters heating furnace through furnace entry table, heating furnace porch grating scale is sent to control system by detection signal and realizes demonstration monitoring tablet position, it is to be controlled that a pair of grating scale of the section of coming out of the stove realizes that high temperature tablet is come out of the stove etc., receive system signal, high temperature tablet quick tapping, locate fast centering through alignment table, the quick jack-up of jacking system, the position sensor detection position signal at alignment table place is used for controlling feeding manipulator and locates fast, feeding manipulator completes press material loading fast, tablet temperature is sent to control system by the infrared radiation thermometer being arranged on press, the motion of control press slide, blanking mechanical hand takes out the part after stamping quenching to be put on line conveyor fast, then be sent to laser cutting unit, ball blast oiling unit carries out trimming and cuts hole, ball blast oiling.
The production technology that the present invention has simultaneously provided the hot press-formed production line of high-strength steel sheet around aforesaid production line is:
1. high-strength boron steel plate is first by the uncoiling of coil feed line unit, smoothing, and is sent to blanking buttress material unit.
2. blanking buttress material unit is according to need of production blanking, and complex deformation part will carry out preformed, and then buttress is expected stack pallet, and simple part directly buttress is expected stack pallet.
3. stack pallet transports tablet to put in place, utilizes sucker to support device tablet is carried to mark platform by de-stacking manipulator, after double-sheet detection is determined, carries out the mark of punching press prefix, and then de-stacking manipulator puts it to entering on the outer roller-way of fire door place stove of heating furnace.
4. entering outside fire door stove on roller-way; by centering body, tablet is carried out to centering location; then tablet enters in roller hearth type heating furnace, in order to prevent tablet high-temperature oxydation, is under 99.99% nitrogen atmosphere protective condition in purity; tablet is through being heated to 900 ℃; after the even austenite of structural transformation, quick tapping, outside plug for outlet stove on roller-way; again located by centering body quick centring, and by jacking system, the tablet after heating is held up fast.
5. feeding manipulator has quick and precisely been removed high temperature tablet by high temperature resistant clamper, and quick and precisely puts into after press die, returns fast.Two mechanical arm holder fingers adopt high temperature resistant stainless steel material, before tablet enters mould, mold cavity are carried out to automated cleaning.
6. detecting that high temperature tablet is after can punching press scope, slide block closing speed is greater than 700mm/s, slide block opening speed is greater than 500mm/s, press is tablet is stamping and pressurize fast, the press dwell time is not less than 20s, mould with cooling circuit carries out Quenching Treatment by the tablet after being shaped with the cooling rate that is not less than 40 ℃/S, makes to organize and changes martensite completely into, press quick return.
7. blanking mechanical hand has quenched punching press fast part takes out, and is sent to laser cutting unit after being cooled to room temperature.
8. the laser cutting machine tool that adopts five-axle linkage, carries out trimming, working of the cutting hole to part.
9. carry out bead with shot-blasting machine, remove surface scale, after cleaning out, carry out oiling or the processing of spraying paint.
The each unit of production line, can require flexible adjust operation beat according to production task, to guarantee the productive temp of whole production line.
What the present invention and embodiment emphasis will solve is by existing equipment and PLC control system, constitute a complete automatic production line by optimal design, equipment wherein and control system, under prompting of the present invention, can be in optimized selection and arrange in pairs or groups, and describe in detail no longer one by one here.
Claims (3)
1. the hot press-formed production line of high-strength steel sheet, mainly formed by 2.6*1800mm coil feed line unit, blanking stacking unit, de-stacking mark unit, 20m heating furnace unit, rapid material-feeding unit, 800t press unit, fast blanking unit, 1000*1800mm laser cutting unit and 1200*2000mm ball blast oiling unit, there is the PLC control system of oneself each unit, it is characterized in that: coil feed line unit mainly by uncoiler, draw material machine, levelling machine, measurement mechanism and conveyer and form; Blanking buttress material unit is mainly made up of blanking and punching stamping machine, preformed stamping machine, buttress material machine, dumper; De-stacking mark unit is mainly made up of de-stacking manipulator, mark platform; Roller hearth type heating furnace unit is mainly made up of furnace entry table, roller hearth type heating furnace, alignment table and tablet jacking system, and wherein alignment table forms middle finger by two groups 12; Rapid material-feeding unit is made up of two manipulators; Press unit is mainly made up of high speed press, mould, temperature measuring equipment; Fast blanking unit is made up of two manipulators; Laser cutting unit is made up of more than 6 laser cutting machine tool; Ball blast oiling unit is mainly made up of shot-blast apparatus, oiling device; The PLC control system of each unit is connected with the PLC of production line main website control system by PROFIBUS industrial bus; On dumper track, be provided with position sensor; Be respectively equipped with grating scale in heating furnace porch and the section of coming out of the stove; At the position sensor that is provided with at alignment table place; Press is provided with infrared radiation thermometer; The de-stacking machinery hand getting of de-stacking mark unit with thering is X, Z axis moves and rotates 3 frees degree around Z axis, mark platform is with double-sheet checkout gear; In roller hearth type heating furnace stove in roller hearth type heating furnace unit, adopt ceramic rod, the width of furnace interior is not less than 2800 mm, and internal height is not less than 100 mm, adopts Electric heating; Two manipulators employings of rapid material-feeding unit have X, Y, Z axis and move three degree of freedom, X, Y-axis translational speed 5000mm/s, and Z axis translational speed 3000mm/s, positioning precision 0.1mm, and this manipulator has blowing mechanism; Total mold clamping force 8000 KN of press of press unit, maximum open height 1800 mm, effective travel 1000 mm, the dwell time can reach 20s, and slide block closing speed is greater than 700mm/s, and slide block opening speed is greater than 500mm/s, mould inside design cooling circuit.
2. the production technology of the hot press-formed production line of high-strength steel sheet according to claim 1, is characterized in that:
(1) high strength steel plate is by the uncoiling of coil feed line unit, cutting, smoothing, and is sent to blanking buttress material unit;
(2) blanking buttress material unit is according to need of production blanking, punching;
(3) dumper transports tablet to put in place, utilizes sucker to support device tablet is carried to mark platform by de-stacking manipulator, after double-sheet detection is determined, carries out the mark of punching press prefix, and then de-stacking manipulator puts it to entering on the outer roller-way of fire door place stove of heating furnace;
(4) entering outside fire door stove on roller-way, by centering body, tablet is carried out to centering location, then tablet enters in roller hearth type heating furnace, under nitrogen protection condition, tablet is through being heated to 850-950 ℃, after the even austenite of structural transformation, quick tapping, outside plug for outlet stove, on roller-way, again located by centering body quick centring, and by jacking system, the tablet after heating is held up fast;
(5) feeding manipulator has quick and precisely been removed high temperature tablet by high temperature resistant clamper, and quick and precisely puts into after press die, returns fast;
(6) utilize the temperature-detecting device of press, detecting that high temperature tablet is after can punching press scope, press is stamping by tablet fast, and pressurize, within the dwell time, the tablet after being shaped is carried out Quenching Treatment by mould with cooling circuit, makes to organize and change martensite completely into, press quick return;
(7) blanking mechanical hand has quenched punching press fast part takes out, and is sent to laser cutting unit after being cooled to room temperature;
(8) laser cutting machine tool of employing five-axle linkage, carries out trimming, working of the cutting hole to part;
(9) carry out bead with shot-blasting machine, remove surface scale, after cleaning out, carry out oiling or the processing of spraying paint.
3. the production technology of the hot press-formed production line of high-strength steel sheet according to claim 2, is characterized in that: the roller hearth type heating furnace of step (4) roller hearth type heating furnace unit is under 99.99% nitrogen atmosphere protective condition, tablet to be heated to 880～930 ℃ of insulations in purity; Two mechanical arm holder fingers in step (5) adopt high temperature resistant stainless steel material, before tablet enters mould, mold cavity are carried out to automated cleaning; Step (6) the press dwell time is not less than 20s, and slide block closing speed is greater than 700mm/s, and slide block opening speed is greater than 500mm/s, and mould quenches to plate with the cooling rate that is not less than 40 ℃/S.
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| CN201210283191.8A CN102756251B (en) | 2012-05-18 | 2012-08-10 | High-strength steel plate hot-stamping molding production line and production process thereof |
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| US9662723B2 (en) | 2013-04-28 | 2017-05-30 | Baoshan Iron & Steel Co., Ltd. | Method and system for combined shearing of steel plate |
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| CN103849740B (en) * | 2012-11-29 | 2015-12-02 | 宣中光 | A kind of making method of high-strength anti-fatigue steel products |
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