CN104056994B - The intensive hot forming production line of automobile boron steel part and heat forming technology - Google Patents
The intensive hot forming production line of automobile boron steel part and heat forming technology Download PDFInfo
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Abstract
The present invention relates to a kind of intensive hot forming production line and heat forming technology of automobile boron steel part, comprise feeding robot, it is characterized in that: at described feeding robot left and right side, batch-type furnace is set, de-stacking device and alignment table are set on front side of feeding robot, on rear side of feeding robot, press is set, arrange material collecting device on rear side of press, de-stacking device side arranges de-stacking automatics.Described heat forming technology, comprises the following steps: 1: boron plate or boron steel pipe are said good-bye separation by de-stacking device; 2: de-stacking automatics by workpiece handling to alignment table; 3: workpiece is carried to batch-type furnace from alignment table by feeding robot; 4: workpiece carries out austenitizing; 5: feeding robot takes out workpiece from batch-type furnace, be carried in the mould of press, rollback is to alignment table; 6: press stamped workpieces, and pressurize quenching; 7: workpiece is positioned in material collecting device.The present invention is completed by a robot, and ensures production efficiency and the quality of workpiece.
Description
Technical field
The present invention relates to a kind of intensive hot forming production line and heat forming technology of automobile boron steel part, especially a kind of boron steel steel plate, or/and hot forming under steel pipe high temperature and quenching technical and intensive batch-type furnace production line, belongs to automobile plastic forming technology field.
Background technology
Automobile boron steel steel plate is as one emerging superhigh intensity hot forming steel plate, and production technology is divided into 4 stages:
(1) heat: boron steel steel plate is heated to the temperature required for heat treatment;
(2) transmit: boron steel steel plate is sent in mould to be punched;
(3) be shaped: as shown in Figure 1a, be at high temperature shaped by mould punching;
(4) quench cooled: as shown in Figure 1 b, controls different cooling velocities in zones of different, can occur:
A) hard area cools (>25 DEG C/sec) fast: from austenite microstructure to the transformation of martensite microstructure, obtains intensity and extreme hardness, part that plasticity is lower; Its intensity can reach 1500 ~ 2000MPa, and plasticity is greater than 5%;
B) soft district cools at a slow speed (<25 DEG C/sec): by controlling different cooling velocities, in the process that austenite structure transforms, can Slow cooling, to the transformation of ferrite and pearlite microstructure, obtain intensity and hardness is higher, plasticity is good part; Also comparatively fast can cool, to the transformation of bainite microstructure, obtain intensity and hardness is very high, plasticity is moderate part.
Can be obtained the boron steel material of varying strength and plasticity by above-mentioned technique, typical case is as shown in table 1.
Table 1
| Sequence number | Material specification | Yield strength (Mpa) | Tensile strength (Mpa) | Percentage elongation (A50) | Hardness (HV2) |
| 1 | HS400 | 400+/-50 | 600+/-50 | 15％ | 170～220 |
| 2 | HS550 | 550+/-50 | 750+/-50 | 7％ | 220～255 |
| 3 | HS700 | 700+/-50 | 900+/-50 | 6％ | 270～300 |
| 4 | HS1150 | 1150+/-50 | 1500+/-50 | 5％ | 400～520 |
The most common one of such boron steel can reach 1500MPa intensity, and the chemical composition of HS1150 is as shown in table 2.
Table 2
| C | Si | Mn | P | S | Cr | B | |
| Minimum | 0.20 | 0.20 | 1.00 | - | - | 0.15 | 0.0015 |
| Maximum | 0.25 | 0.35 | 1.30 | 0.025 | 0.015 | 0.25 | 0.0050 |
The production line of the above thermoformed parts of acquisition common at present, is mostly line formula cylinder heating furnace production line.This production line has the high advantage of production efficiency, but owing in the online stove of workpiece being motion heating, send rear positional precision from burner hearth and be difficult to ensure, workpiece is not accurate enough, stable in subsequent work stations location, usually occurs producing and shuts down.In order to evade this problem as far as possible, line formula cylinder heating furnace production line is difficult to the production model being developed to large table top, fecund goes out, and mostly is every jig frequency part, both cannot meet that productive temp is short, and one-shot time output part is many again.Meanwhile, in order to enhance productivity, reduce productive temp, heating furnace is usually very long, and what have reaches 45m, and investment amount is larger.
On the other hand, people start to attempt using batch-type furnace production line.Although batch-type furnace has workpiece transfixion in batch-type furnace, thus the advantage of accurate positioning, but batch-type furnace is workpiece utilizes upper and lower spatial multi vertical out-fall, limited space, in order to reach the productive temp same with line formula cylinder heating furnace, mostly put 3-4 batch-type furnace in the material loading side of press, stove is entered in order to realize workpiece in certain beat, come out of the stove, the transport of entrance pressure machine, must arrange to heating furnace input and the robot taking out workpiece, by workpiece handling at least three automatic mechanical hands such as the robot on press side and robot workpiece being dropped into press, space is nervous, work piece delivery time long insulation difficulty, automation cost also increases thereupon.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of intensive hot forming production line of automobile boron steel part is provided, workpiece is to the input of heating furnace and taking-up, workpiece handling is to press side and workpiece is dropped into press, all completed by a robot, production of parts does not decline simultaneously.
The present invention also provides a kind of heat forming technology of automobile boron steel part, adopts intensive hot forming production line, ensures production efficiency and the quality of workpiece.
According to technical scheme provided by the invention, the intensive hot forming production line of described automobile boron steel part, comprise 1 feeding robot, it is characterized in that: at the left and right side of described feeding robot, the first batch-type furnace and the second batch-type furnace are set respectively, in the front side of feeding robot, de-stacking device and alignment table are set, arrange press at the rear side of feeding robot, the rear side of press arranges material collecting device, and de-stacking device side arranges de-stacking automatics.
Further, described de-stacking device adopts unstacker.
Further, carving device is set on front side of described alignment table.
Further, described de-stacking automatics adopts robot, feeding belt or its combination.
Further, described feeding robot main body is general 5-7 axle rotary machine people or 3-4 axle rectilinear motion Cartesian robot, and feeding robot has the terminal-collecting machine grasping system capturing and throw in workpiece.
Further, described first batch-type furnace and the second batch-type furnace are hierarchy, and every layer measure-alike and mate with press table size, and the number of plies is 3-8 layer.
Further, described first batch-type furnace and the second batch-type furnace symmetry are placed on the both sides of feeding robot.
The intensive heat forming technology of described automobile boron steel part, is characterized in that, comprise the following steps:
Step 1: boron plate or boron steel pipe are said good-bye separation by de-stacking device, and beat of saying good-bye is not slower than the speed of batch-type furnace heated parts;
Step 2: de-stacking automatics is by workpiece handling to alignment table, and the transmission speed of de-stacking automatics is 0-5m/s, and the transmission time is 0.1-20s;
Step 3: feeding robot from alignment table picking up work piece, be carried to the first batch-type furnace or the second batch-type furnace, then gripper shoe/beam workpiece being placed on batch-type furnace exits batch-type furnace, fire door closes; The speed of described feeding robot carrying workpiece is 2-5m/s, picking up work piece, transmits, is placed to batch-type furnace and the overall transmission time exiting batch-type furnace is 2-8s;
Step 4: workpiece heat is carried out austenitizing to 850-940 DEG C by batch-type furnace, workpiece programming rate is 2 ~ 15 DEG C/s;
Step 5: feeding robot rotates 180 °, one deck oven door opening of workpiece austenitizing in the first batch-type furnace or the second batch-type furnace, workpiece takes out by feeding robot, is carried in the mould of press, then rollback is to alignment table feeding position; The transmission speed of described feeding robot is 2-5m/s, rotates 180 °, picking up work piece, transmission, input be 6-16s to the overall transmission time of press; Described feeding robot rollback is 4-7m/s to the average transmission speed of alignment table feeding position, and the transmission time is 2-4s;
Described feeding robot 1 completes a working cycles from step 3 to step 5, the time of a working cycles is 10-28 second;
Step 6: after press descending drop stamping workpiece to technique required form, be still in closure state, work-piece cools pressurize is quenched, and press is up subsequently; Described press pressurize closing time is 7-20s, and the work tempo of press is 10-28 second;
Step 7: workpiece is taken out in the mould of press, is positioned in material collecting device.
Further, in described step 1: after de-stacking device is said good-bye, also comprise de-stacking automatics and workpiece handling to carving device position is carried out the process that stamp carves characters; After stamp is carved characters again by Workpiece transfer to alignment table; The work tempo of described carving device is 1 ~ 10s.
Further, in described step 1, the beat of saying good-bye of described de-stacking device is 0.1 ~ 1s.
The present invention compared with prior art has the following advantages: (1) the present invention only uses 1 feeding robot and 1 group of terminal-collecting machine, complete whole actions of the entering stove, come out of the stove of workpiece, entrance pressure machine, effectively improve the service efficiency of robot, reduce the cost of investment of equipment.(2) due to action that the present invention uses 1 feeding robot once to complete in stove feeding and feed intake to press, the time that workpiece exposes in atmosphere shortens dramatically, reduce along with temperature before component shaping and occur that the risk of cracking greatly reduces, problem without the oxidation of coating bare board workpiece is also eased, thus effectively improves the quality of product.(3) although the present invention only employs 2 heating furnaces, for the major product that production line is produced, by strengthening the method for size of burner hearth and press table size, the unit output that every jig frequency produces 4 parts is realized.The Normal practice of 2 parts is produced compared to every jig frequency, invention increases the time of productive temp, too increase the unit output of each productive temp simultaneously, not only overall production efficiency does not reduce, and parts transport location is more stable, the press dwell time is longer, workpiece size and structure property more reliable and more stable.
Accompanying drawing explanation
Fig. 1 a is that automobile boron steel part is at high temperature by the shaping front schematic diagram of mould punching.
Fig. 1 b is the schematic diagram of automobile boron steel part pressurize quench cooled in a mold.
Fig. 2 is the structural representation of the intensive hot forming production line of automobile boron steel part of the present invention.
Fig. 3 is the A direction view of Fig. 2.
Fig. 4 is the production schematic diagram of automobile boron steel part in embodiment one.
Fig. 5 is the production schematic diagram of automobile boron steel part in embodiment two.
In figure, sequence number is: feeding robot 1, first batch-type furnace 2, second batch-type furnace 3, de-stacking device 4, alignment table 5, press 6, material collecting device 7, de-stacking automatics 8, carving device 9.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Figure 2, the intensive hot forming production line of automobile boron steel part of the present invention comprises 1 feeding robot 1, at the left and right side of feeding robot 1, the first batch-type furnace 2 and the second batch-type furnace 3 is set respectively, de-stacking device 4 and alignment table 5 are set in the front side of feeding robot 1, at the rear side of feeding robot 1, press 6 is set, the rear side of press 6 arranges material collecting device 7, and de-stacking device 4 side arranges de-stacking automatics 8;
Described de-stacking device 4 adopts unstacker, in outfit under moving buttress functional conditions, arranges 2 unstackers, does not need to arrange 1 unstacker in time moving buttress function; De-stacking platform size and press 6 mesa dimensions of described de-stacking device 4 match;
On front side of described alignment table 5, carving device 9 is set;
Described de-stacking automatics 8 adopts the various ways such as robot, feeding belt or its combination to realize;
Described feeding robot 1 main body is general 5-7 axle rotary machine people or 3-4 axle rectilinear motion Cartesian robot; Described feeding robot 1 has the terminal-collecting machine grasping system capturing and throw in workpiece, from alignment table 5 feeding, to feeding in the first batch-type furnace 2 or the second batch-type furnace 3, realize by with 1 group of terminal-collecting machine from feeding in the first batch-type furnace 2 or the second batch-type furnace 3 with to feeding in press 6 again, terminal-collecting machine grasping system possesses solar heat protection function, and the time that can stop in the environment repeatedly below 940 degree is more than 10s;
As shown in Figure 3, described first batch-type furnace 2 and the second batch-type furnace 3 are hierarchy, and every layer measure-alike, mate with press 6 mesa dimensions, every layer all can place work piece, and independent heating workpiece is to uniform austenitic, the number of plies changes with whole line productive temp planning requirement difference, is preferably 3-8 layer; The burner hearth planar dimension of described first batch-type furnace 2 and the second batch-type furnace 3 mates with press 6 work top, and the effective heating surface (area) (HS of individual layer burner hearth is not less than 50% of press 6 area of work; Described first batch-type furnace 2 and the second batch-type furnace 3 symmetry are placed on the both sides of feeding robot 1; The fire door of described first batch-type furnace 2 and the second batch-type furnace 3 realizes every layer of independent open and close by electronic and/or pneumatic and/or hydraulic drive.
Embodiment one: a kind of intensive heat forming technology of automobile boron steel part, comprises the following steps, as shown in Figure 4:
Step 1: boron plate or boron steel pipe are said good-bye separation by the separating device of de-stacking device 4, and beat of saying good-bye is not slower than the speed of batch-type furnace heated parts, is preferably 0.1s; The de-stacking platform of described de-stacking device is of a size of 2200mm × 2200mm;
Step 2: workpiece handling to carving device 9 position, is carried out stamp and carves characters after (date of manufacture, Part No. etc.), by Workpiece transfer to alignment table 5 by de-stacking automatics 8; The transmission speed of described de-stacking automatics 8 is adjustable, and preferred transmission speed is 0.1m/s, and the transmission time is preferably 20s, and transmission range is 2m; The speed of carving characters of described carving device 9 is adjustable, and beat is not slower than the speed of batch-type furnace heated parts, is preferably 1s; Described alignment table 5 is of a size of 2200mm × 2200mm;
Described carving device is different to the requirement difference of product back-tracing with client.When client requires without stamp workpiece retrospective, this step can economize slightly de-stacking automatics directly by workpiece from transferring to alignment table, be no longer equipped with carving device.
Step 3: feeding robot 1 from alignment table 5 by workpiece handling to the first batch-type furnace 2 or the second batch-type furnace 3, batch-type furnace is at the front opening fire door of workpiece arrival, terminal-collecting machine stretches in batch-type furnace together with workpiece by feeding robot 1, workpiece is placed on the gripper shoe/beam of batch-type furnace, terminal-collecting machine exits batch-type furnace under feeding robot 1 is drawn, and fire door is closed;
The speed that feeding robot 1 carries workpiece is adjustable, and average transmission speed is preferably 2m/s, and the transmission time (comprising workpiece to pick up, transmit, throw in batch-type furnace and exit batch-type furnace four part) is preferably 2s, and transmission range is preferably 4m;
Step 4: batch-type furnace by workpiece heat to 850-940 DEG C, workpiece austenitizing; Every layer of furnace chamber efficiency of heating surface of described batch-type furnace is adjustable, and preferred workpiece programming rate is 2 DEG C/s, and the planar dimension of every layer of furnace chamber of batch-type furnace is 2200mm × 2200mm;
Step 5: feeding robot 1 rotates 180 °, one deck oven door opening of workpiece austenitizing in first batch-type furnace 2 or the second batch-type furnace 3, the terminal-collecting machine of feeding robot 1 stretches into this burner hearth, is taken out by workpiece, be carried in the mould of press 6, feeding robot 1 rollback is to alignment table 5 feeding position;
The speed that described feeding robot 1 carries workpiece is adjustable, and the average transmission that feeds intake speed is preferably 2m/s, and the transmission time (comprise rotation 180 °, workpiece picks up, transmit, throw in press four part) is preferably 16s; The average transmission speed of rollback (to alignment table feeding position) is preferably 4m/s, transmission time preferred 4s, and transmission range is determined by step 3 and step 5;
Described feeding robot 1 completes a working cycles from step 3 to step 5, the work tempo time of circulation is 24-28 second;
Step 6: after press 6 descending drop stamping workpiece to technique required form, be still in closure state, make workpiece with certain cooling velocity pressurize quenching, press 6 is up subsequently;
Described press 6 mesa dimensions adopts large work top, meet the processing request of dissimilar workpiece, the workpiece wherein preferentially meeting main Types a punching production can go out 4 parts, and the workpiece of non-principal type has certain free degree, and preferably a punching production goes out 2-8;
Described press 6 pressurize closing time is variant with workpiece difference, and be preferably 7-20s, the slide block operating rate of press 6 is adjustable, thus press 6 overall work beat is 10-28 second;
Step 7: taken out in the mould of press 6 by workpiece, is positioned in material collecting device 7;
Described material collecting device 7 adopts automatic material receiving or manual rewinding pattern, and the required work tempo time is no longer than the work tempo of press 6.
Embodiment two: a kind of intensive heat forming technology of automobile boron steel part, comprises the following steps, as shown in Figure 5:
Step 1: boron plate or boron steel pipe are said good-bye separation by the separating device of de-stacking device 4, and beat of saying good-bye is not slower than the speed of batch-type furnace heated parts, is preferably 1s; The de-stacking platform of described de-stacking device is of a size of 2500mm × 2500mm;
Step 2: workpiece handling to carving device 9 position, is carried out stamp and carves characters after (date of manufacture, Part No. etc.), by Workpiece transfer to alignment table 5 by de-stacking automatics 8; The transmission speed of described de-stacking automatics 8 is adjustable, and preferred transmission speed is 5m/s, and the transmission time is preferably 0.1s; The speed of carving characters of described carving device 9 is adjustable, and beat is not slower than the speed of batch-type furnace heated parts, is preferably 10s; Described alignment table 5 is of a size of 2500mm × 2500mm;
Described carving device is different to the requirement difference of product back-tracing with client.When client requires without stamp workpiece retrospective, this step can economize slightly de-stacking automatics directly by workpiece from transferring to alignment table, be no longer equipped with carving device.
Step 3: feeding robot 1 from alignment table 5 by workpiece handling to the first batch-type furnace 2 or the second batch-type furnace 3, batch-type furnace is at the front opening fire door of workpiece arrival, terminal-collecting machine stretches in batch-type furnace together with workpiece by feeding robot 1, workpiece is placed on the gripper shoe/beam of batch-type furnace, terminal-collecting machine exits batch-type furnace under feeding robot 1 is drawn, and fire door is closed;
The speed that feeding robot 1 carries workpiece is adjustable, and average transmission speed is preferably 5m/s, and the transmission time (comprising workpiece to pick up, transmit, throw in batch-type furnace and exit batch-type furnace four part) is preferably 2s;
Step 4: batch-type furnace by workpiece heat to 850-940 DEG C, workpiece austenitizing; Every layer of furnace chamber efficiency of heating surface of described batch-type furnace is adjustable, and preferred workpiece programming rate is 15 DEG C/s, and the planar dimension of every layer of furnace chamber of batch-type furnace is 2500mm × 2500mm;
Step 5: feeding robot 1 rotates 180 °, one deck oven door opening of workpiece austenitizing in first batch-type furnace 2 or the second batch-type furnace 3, the terminal-collecting machine of feeding robot 1 stretches into this burner hearth, is taken out by workpiece, be carried in the mould of press 6, feeding robot 1 rollback is to alignment table 5 feeding position;
The speed that described feeding robot 1 carries workpiece is adjustable, and the average transmission that feeds intake speed is preferably 5m/s, and the transmission time (comprise rotation 180 °, workpiece picks up, transmit, throw in press four part) is preferably 6s; The average transmission speed of rollback (to alignment table feeding position) is preferably 7m/s, transmission time preferred 2s, and transmission range is determined by step 3 and step 5;
Described feeding robot 1 completes a working cycles from step 3 to step 5, the work tempo time of circulation is 10-28 second;
Step 6: after press 6 descending drop stamping workpiece to technique required form, be still in closure state, make workpiece with certain cooling velocity pressurize quenching, press 6 is up subsequently;
Described press 6 mesa dimensions adopts large work top, meet the processing request of dissimilar workpiece, the workpiece wherein preferentially meeting main Types a punching production can go out 4 parts, and the workpiece of non-principal type has certain free degree, and preferably a punching production goes out 2-8;
Described press 6 pressurize closing time is variant with workpiece difference, and be preferably 7-20s, the slide block operating rate of press 6 is adjustable, thus press 6 overall work beat is 10-28 second;
Step 7: taken out in the mould of press 6 by workpiece, is positioned in material collecting device 7;
Described material collecting device 7 adopts automatic material receiving or manual rewinding pattern, and the required work tempo time is no longer than the work tempo of press 6.
Claims (4)
1. the intensive hot forming production line of an automobile boron steel part, comprise 1 feeding robot (1), it is characterized in that: at the left and right side of described feeding robot (1), the first batch-type furnace (2) and the second batch-type furnace (3) are set respectively, de-stacking device (4) and alignment table (5) are set in the front side of feeding robot (1), at the rear side of feeding robot (1), press (6) is set, the rear side of press (6) arranges material collecting device (7), and de-stacking device (4) side arranges de-stacking automatics (8);
Described de-stacking device (4) adopts unstacker;
In described alignment table (5) front side, carving device (9) is set;
Described de-stacking automatics (8) adopts robot, feeding belt or its combination;
Described feeding robot (1) main body is general 5-7 axle rotary machine people or 3-4 axle rectilinear motion Cartesian robot, and feeding robot (1) has the terminal-collecting machine grasping system capturing and throw in workpiece;
Described first batch-type furnace (2) and the second batch-type furnace (3) are hierarchy, and every layer measure-alike and mate with press (6) mesa dimensions, and the number of plies is 3-8 layer;
Described first batch-type furnace (2) and the second batch-type furnace (3) symmetry are placed on the both sides of feeding robot (1).
2. an intensive heat forming technology for automobile boron steel part, is characterized in that, comprise the following steps:
Step 1: boron plate or boron steel pipe are said good-bye separation by de-stacking device (4), and beat of saying good-bye is not slower than the speed of batch-type furnace heated parts;
Step 2: de-stacking automatics (8) is by workpiece handling to alignment table (5), and the transmission speed of de-stacking automatics (8) is 0-5m/s, and the transmission time is 0.1-20s;
Step 3: feeding robot (1) from alignment table (5) picking up work piece, be carried to the first batch-type furnace (2) or the second batch-type furnace (3), then gripper shoe/beam workpiece being placed on batch-type furnace exits batch-type furnace, fire door closes; The speed of described feeding robot (1) carrying workpiece is 2-5m/s, picking up work piece, transmits, is placed to batch-type furnace and the overall transmission time exiting batch-type furnace is 2-8s;
Step 4: workpiece heat is carried out austenitizing to 850-940 DEG C by batch-type furnace, workpiece programming rate is 2 ~ 15 DEG C/s;
Step 5: feeding robot (1) rotates 180 °, one deck oven door opening of the first batch-type furnace (2) or the middle workpiece austenitizing of the second batch-type furnace (3), workpiece takes out by feeding robot (1), be carried in the mould of press (6), then rollback is to alignment table (5) feeding position; The transmission speed of described feeding robot (1) is 2-5m/s, rotates 180 °, picking up work piece, transmission, input be 6-16s to the overall transmission time of press; Described feeding robot (1) rollback is 4-7m/s to the average transmission speed of alignment table (5) feeding position, and the transmission time is 2-4s;
Described feeding robot (1) completes a working cycles from step 3 to step 5, the time of a working cycles is 10-28 second;
Step 6: after press (6) descending drop stamping workpiece to technique required form, be still in closure state, work-piece cools pressurize is quenched, press (6) is up subsequently; Described press (6) pressurize closing time is 7-20s, and the work tempo of press (6) is 10-28 second;
Step 7: workpiece is taken out in the mould of press (6), is positioned in material collecting device (7).
3. the intensive heat forming technology of automobile boron steel part as claimed in claim 2, it is characterized in that: in described step 1: after de-stacking device (4) is said good-bye, also comprise de-stacking automatics (8) and workpiece handling to carving device (9) position is carried out the process that stamp carves characters; After stamp is carved characters again by Workpiece transfer to alignment table (5); The work tempo of described carving device (9) is 1 ~ 10s.
4. the intensive heat forming technology of automobile boron steel part as claimed in claim 2, it is characterized in that: in described step 1, the beat of saying good-bye of described de-stacking device (4) is 0.1 ~ 1s.
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| CN104056994A (en) | 2014-09-24 |
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Address after: 214145 Hongshan Road, Jiangsu, Wuxi Province, Hongshan street, machinery and Optoelectronics Industrial Park No. 111 Hongda Road Patentee after: Wuxi Lang Xian lightweight Polytron Technologies Inc Address before: 214145 Hongshan Road, Jiangsu, Wuxi Province, Hongshan street, machinery and Optoelectronics Industrial Park No. 111 Hongda Road Patentee before: Wuxi Co., Ltd of Lang Xian motor vehicle assembly research and development centre |