CN104726677B - Fixed liner plate formula van-type heating furnace and its hot forming segmentation reinforcement process - Google Patents
Fixed liner plate formula van-type heating furnace and its hot forming segmentation reinforcement process Download PDFInfo
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- CN104726677B CN104726677B CN201510145851.XA CN201510145851A CN104726677B CN 104726677 B CN104726677 B CN 104726677B CN 201510145851 A CN201510145851 A CN 201510145851A CN 104726677 B CN104726677 B CN 104726677B
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- liner plate
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- fixed liner
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- burner hearth
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000011218 segmentation Effects 0.000 title claims abstract description 15
- 230000008569 process Effects 0.000 title claims abstract description 11
- 230000002787 reinforcement Effects 0.000 title claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 229910000712 Boron steel Inorganic materials 0.000 claims abstract description 10
- 229920000742 Cotton Polymers 0.000 claims abstract description 6
- 238000004321 preservation Methods 0.000 claims abstract description 6
- 238000004080 punching Methods 0.000 claims abstract description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 238000003763 carbonization Methods 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 230000029087 digestion Effects 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 229910001566 austenite Inorganic materials 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 229910000734 martensite Inorganic materials 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 206010054949 Metaplasia Diseases 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Abstract
The present invention relates to a kind of fixed liner plate formula van-type heating furnace and its hot forming segmentation reinforcement process, including housing, case inside arranges heat-preservation cotton, and the side of housing arranges fire door；It is characterized in that：The burner hearth of the enclosure interior is divided into some regions, the top of isolating door to be connected with the piston rod of telescopic cylinder by one or more isolating doors；Heating element heater and fixed liner plate are installed in the enclosure interior, fixed liner plate horizontal arrangement is in the burner hearth of enclosure interior.The hot forming segmentation reinforcement process, is characterized in that, comprise the following steps：（1）Boron steel workpiece is sent in burner hearth, is positioned on fixed liner plate；（2）Hard area into hard area and soft zone, is heated to 880～930 DEG C by furnace chamber by isolating door, and soft zone is heated to 500～800 DEG C, and zones of different heating-up temperature is arranged to be realized by van-type stove electric-control system with control；（3）After workpiece reaches regulation heating-up temperature, workpiece is taken out carries out hot forming punching press and cooling.The present invention can realize the segmentation strengthening digestion of workpiece.
Description
Technical field
The present invention relates to a kind of fixed liner plate formula van-type heating furnace and its hot forming segmentation reinforcement process, especially a kind of boron
Hot forming segmentation reinforcing quenching technological and box furnace apparatus under steel steel plate or/and steel pipe high temperature, belongs to metal forming skill
Art field.
Background technology
Boron steel steel plate is divided into 4 stages as a kind of emerging superhigh intensity hot forming steel plate, production technology：
(1) heat：The principal crystalline phase of annealed condition is organized as ferritic boron steel steel plate or/and steel pipe is heated to hot place
Temperature required for reason；
(2) transmit：Boron steel steel plate is sent in mould to be punched；
(3) shape：Shaped by mould punching at high temperature；
(4) cool down：Workpiece is cooled to temperature required, usually quenching process：If now boron steel is austenitic state,
Different cooling velocities are controlled in zones of different, different phase transformations can occur：
A) hard area quickly cools down (25 DEG C/sec of ＞)：If the heating period is by more than workpiece heat to austenite transition temperature,
Usually 930 DEG C, under the cooling velocity, microstructure changes to martensite microstructure, obtains intensity and extreme hardness, modeling
Property relatively low part HS1150, its intensity can reach 1500～2000MPa, and plasticity is more than 5%；
B) soft zone cools down at a slow speed (25 DEG C/sec of ＜)：If the heating period is by more than workpiece heat to austenite transition temperature,
Usually 930 DEG C, under the cooling velocity, by controlling different cooling velocities, during austenite structure is converted, can
With Slow cooling, change to ferrite and pearlite microstructure, obtain intensity and hardness is higher, plasticity is good part
HS400；
C) do not undergo phase transition：If the heating period is not by more than workpiece heat to austenite transition temperature, cooling velocity without
By how to change, workpiece crystalline phase tissue does not change, and still organizes for ferritic-pearlitic.
If on a complete workpiece, different quenching technicals more than zones of different occurs, zones of different are obtained not
With the workpiece of mechanical strength, segmentation reinforcement process, or soft zone technique is just called.
The boron steel material that varying strength and plasticity can be obtained by above-mentioned technique, typical case is as shown in table 1.
Table 1
| Sequence number | Material specification | Yield strength (Mpa) | Tensile strength (Mpa) | Elongation percentage (A50) | Hardness (HV2) |
| 1 | HS400 | 400+/-50 | 600+/-50 | 15% | 170～220 |
| 2 | HS1150 | 1150+/-50 | 1500+/-50 | 5% | 400～520 |
The most common one kind 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 wire type cylinder heating furnace production line.Segmentation
Reinforcement process, is realized by the temperature control of hot-forming die itself mostly.The investment of this production line is big, high energy consumption, heat into
Shape mould structure is complicated, die debugging before the making of new product development stage sample, small lot batch manufacture and production in enormous quantities etc.
In the case of, there is high cost.
Content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of fixed liner plate formula van-type heating furnace and
Its hot forming segmentation reinforcement process, can realize the segmentation strengthening digestion of workpiece.
According to the technical scheme that the present invention is provided, the fixed liner plate formula van-type heating furnace, including housing, case inside sets
Heat-preservation cotton is put, the side of housing arranges fire door；It is characterized in that：The burner hearth of the enclosure interior is split by one or more isolating doors
Into some regions, the top of isolating door is connected with the piston rod of telescopic cylinder；In enclosure interior installation heating element heater and admittedly
Determine liner plate, fixed liner plate horizontal arrangement is in the burner hearth of enclosure interior.
Further, the flatness of the fixed liner plate is not more than ± 2mm.
Further, the fixed liner plate upper surface is provided with some V-type grooves.
Further, the width of the groove is 5～30mm, and depth is 5～30mm.
Further, the material of the fixed liner plate is interior hot steel, pottery or carborundum.
Further, when the contraction cylinder goes upward to peak, the upper surface of the lower end of isolating door and housing internal furnace
Concordantly；When gentry's contracting cylinder comes downwards to minimum point, the lower end of isolating door keeps 5～50mm with workpiece.
Further, the burner hearth is isolated the housing at the handing-over position between the regional that door is separated into using insulation
Structure.
The hot forming segmentation reinforcement process, is characterized in that, comprise the following steps：
(1) boron steel workpiece is sent in burner hearth at room temperature, is positioned on fixed liner plate；
(2) to shrink and exercise the lower end of isolating door apart from 5～50mm of workpiece under cylinder, at the same isolating door by furnace chamber into hard
Hard area is heated to 880～930 DEG C by area and soft zone, and soft zone is heated to 500～800 DEG C, and zones of different heating-up temperature is arranged and control
System is realized by van-type stove electric-control system；
(3) after workpiece reaches regulation heating-up temperature, workpiece is taken out from heating furnace, then carries out hot forming punching press and cold
But.
The present invention has advantages below compared with prior art：
(1) van-type heating furnace small volume of the present invention, invest little, increase area of isolation and its cylinder and/or motor
The cost increased by power set is limited, can but realize that segmentation is strengthened function；
(2) soft zone need not be heated to more than 850 DEG C, cool down which from 850 DEG C also without cooling media, energy during cooling
Consumption is lower；
(3) mould structure is simple, is not different with the mould structure of common heat forming technology, can but realize that segmentation is strengthened
Technique；
(4) for automatic/semi-automatic metaplasia is produced, workpiece, workpiece is supported to put into from burner hearth and take using fixed liner plate
When going out, accurate positioning is unchanged, so that it is guaranteed that the stability that workpiece is positioned in follow-up punching course and accuracy.
Description of the drawings
Fig. 1 is the front view of fixed liner plate formula van-type heating furnace of the present invention.
Side views of the Fig. 2 for Fig. 1.
Specific embodiment
With reference to concrete accompanying drawing, the invention will be further described.
As shown in Fig. 1～Fig. 2：The fixed liner plate formula van-type heating furnace includes housing 1, heat-preservation cotton 2, heating element heater 3, solid
Determine liner plate 4, fire door 5, cylinder 6, burner hearth 7, isolating door 8, groove 9 etc..
As shown in Figure 1 and Figure 2, the present invention includes housing 1, arranges heat-preservation cotton 2 on the inside of housing 1, and the side of housing 1 arranges stove
Door 5, housing 1 is divided into some regions by one or more isolating doors 8, and the housing at the handing-over position between regional is similarly
Using insulation construction；The top of the isolating door 8 is connected with the piston rod of telescopic cylinder 6, is carried out in the presence of telescopic cylinder 6
Pump；When the piston rod of telescopic cylinder 6 is moved downward, the burner hearth in housing 1 is isolated, mutually isolated region
Different temperatures will be warming up to；When the piston rod of telescopic cylinder 6 is moved upwards, in housing 1 burner hearth of adjacent area by UNICOM,
Heating-up temperature is identical.
Heating element heater 3 and fixed liner plate 4 are installed inside the housing 1, fixed 4 horizontal arrangement of liner plate is inside housing 1
Burner hearth 7 in, fixed liner plate 4 plays a part of to support the flatness of workpiece, fixed liner plate 4 to be not more than ± 2mm, to guarantee plate class
Workpiece is fricton-tight in burner hearth 7.4 upper surface of fixed liner plate is provided with some V-type grooves 9, and the width of groove 9 is 5～
30mm, depth are 5～30mm, to guarantee tubing workpiece in burner hearth 7 without rolling.The material of the fixed liner plate 4 be interior hot steel,
The heat proof materials such as pottery, carborundum, are to control energy loss when workpiece enters flake hearth-tapping, and 5 hoisting depth of fire door is being not less than work
Height of the part in burner hearth is defined.
When contraction cylinder 6 goes upward to peak, the lower end of isolating door 8 is concordant with the upper surface of 1 internal furnace of housing, gentry's contracting gas
When cylinder 6 comes downwards to minimum point, the lower end of isolating door 8 keeps necessary safe distance, generally 5～50mm with workpiece.
Embodiment one：Automobile expects thickness 1.5mm with without coating boron steel 22MnB5 workpiece B posts, and its product performance top is hard
Area, intensity reach 1500MPa, and bottom is soft zone, and intensity is 600MPa, elongation percentage 15%, and zone line is transition region.For realizing
The manufacture of the product, as follows using van-type heating furnace technique of the present invention：
(1) telescopic cylinder 6 is moved downward, and isolating door 8 is fallen, the fixed liner plate 20mm of distance；
(2) heating region on the right side of burner hearth arranges 930 DEG C of heating-up temperature, and on the left of burner hearth, heating region arranges heating-up temperature
700℃；
(3) workpiece of plate state is placed on and is fixed in burner hearth as liner plate on the conveyer belt of height, workpiece top is put
On the right side of burner hearth, workpiece bottom is placed on the left of burner hearth；
(4) door opened, manipulator is placed on workpiece in burner hearth and fixes on liner plate；
(5) manipulator is exited, and fire door is closed；
(6) plate consistent temperature to stove is heated；
(7) fire door is opened, and workpiece is fixed from burner hearth by manipulator, and fire door is closed；
(8) by workpiece at high temperature punching press, be quickly quenching into 150 DEG C, and workpiece cooling velocity is not less than 50 DEG C/sec；
As workpiece top is placed in 930 DEG C of thermals treatment zone on the right side of van-type stove, Quick-forming, cooling after austenitizing,
Hard area martensitic structure is obtained, intensity reaches 1500MPa, and workpiece bottom is placed in 700 DEG C of regions on the left of van-type stove, without austenite
Change, still organize for ferritic-pearlitic after shaping, cooling, intensity is obtained for 600MPa, the soft zone performance workpiece of elongation percentage 15%.
Claims (8)
1. a kind of fixed liner plate formula van-type heating furnace, including housing（1）, housing（1）Inner side arranges heat-preservation cotton（2）, housing（1）'s
Side arranges fire door（5）；It is characterized in that：The housing（1）Internal burner hearth（7）By one or more isolating doors（8）It is divided into
Some regions, isolating door（8）Top and telescopic cylinder（6）Piston rod connection；In the housing（1）Internal installation heating unit
Part（3）With fixed liner plate（4）, fixed liner plate（4）Horizontal arrangement is in housing（1）Internal burner hearth（7）In；
The fixed liner plate（4）Flatness be not more than ± 2mm；
The fixed liner plate（4）Upper surface is provided with some V-type grooves（9）；
The groove（9）Width be 5～30mm, depth be 5～30mm；
The fixed liner plate（4）Material be interior hot steel, pottery or carborundum；
The telescopic cylinder（6）When going upward to peak, isolating door（8）Lower end and housing（1）The upper surface of internal furnace is concordant；
Telescopic cylinder（6）When coming downwards to minimum point, isolating door（8）Lower end and workpiece keep 5～50mm；
The burner hearth（7）It is isolated door（8）The housing at the handing-over position between the regional being separated into（1）Using insulation knot
Structure.
2. a kind of hot forming segmentation reinforcement process, the fixed liner plate formula van-type heating furnace used by the technique, including housing（1）,
Housing（1）Inner side arranges heat-preservation cotton（2）, housing（1）Side arrange fire door（5）；The housing（1）Internal burner hearth（7）By
One or more isolating doors（8）It is divided into some regions, isolating door（8）Top and telescopic cylinder（6）Piston rod connection；?
The housing（1）Internal installation heating element heater（3）With fixed liner plate（4）, fixed liner plate（4）Horizontal arrangement is in housing（1）Internal
Burner hearth（7）In；It is characterized in that, comprise the following steps：
（1）Burner hearth sent at room temperature by boron steel workpiece（7）In, it is positioned over fixed liner plate（4）On；
（2）Telescopic cylinder（6）Lower enforcement isolating door（8）Lower end apart from 5～50mm of workpiece, while isolating door（8）By furnace chamber point
Hard area and soft zone is divided into, hard area is heated to 880～930 DEG C, soft zone is heated to 500～800 DEG C, and zones of different heating-up temperature sets
Put and realized by van-type stove electric-control system with control；
（3）After workpiece reaches regulation heating-up temperature, workpiece is taken out from heating furnace, then carry out hot forming punching press and cooling.
3. technique as claimed in claim 2, is characterized in that：The fixed liner plate（4）Flatness be not more than ± 2mm.
4. technique as claimed in claim 2, is characterized in that：The fixed liner plate（4）Upper surface is provided with some V-type grooves
（9）.
5. technique as claimed in claim 4, is characterized in that：The groove（9）Width be 5～30mm, depth be 5～
30mm.
6. technique as claimed in claim 2, is characterized in that：The fixed liner plate（4）Material be interior hot steel, pottery or carbonization
Silicon.
7. technique as claimed in claim 2, is characterized in that：The telescopic cylinder（6）When going upward to peak, isolating door（8）
Lower end and housing（1）The upper surface of internal furnace is concordant；Telescopic cylinder（6）When coming downwards to minimum point, isolating door（8）Lower end with
Workpiece keeps 5～50mm.
8. technique as claimed in claim 2, is characterized in that：The burner hearth（7）It is isolated door（8）The regional being separated into it
Between handing-over position housing（1）Using insulation construction.
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| CN201510145851.XA CN104726677B (en) | 2015-03-30 | 2015-03-30 | Fixed liner plate formula van-type heating furnace and its hot forming segmentation reinforcement process |
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| CN201510145851.XA CN104726677B (en) | 2015-03-30 | 2015-03-30 | Fixed liner plate formula van-type heating furnace and its hot forming segmentation reinforcement process |
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| CN104726677B true CN104726677B (en) | 2017-03-15 |
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| CN114908237B (en) * | 2022-05-10 | 2023-11-10 | 宣城冠晟汽车科技有限公司 | Local softening device of automobile thermoforming part |
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Effective date of registration: 20170810 Address after: 224022 No. 9 Fumin Road, Yi Feng Industrial Park, Great Salt Lake area, Jiangsu, Yancheng City Patentee after: Yancheng Keao Heat Treatment Equipment Factory Address before: 224022, Yancheng City Province, the town of Salt Lake area, large longitudinal road, Fumin Road, No. 9, No. Patentee before: YANCHENG KEAO MECHANICAL CO.,LTD. |
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Effective date of registration: 20171124 Address after: 224022 No. 9 Fumin Road, Yi Feng Industrial Park, Great Salt Lake area, Jiangsu, Yancheng City Patentee after: YANCHENG KEAO MECHANICAL CO.,LTD. Address before: 224022 No. 9 Fumin Road, Yi Feng Industrial Park, Great Salt Lake area, Jiangsu, Yancheng City Patentee before: Yancheng Keao Heat Treatment Equipment Factory |
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Denomination of invention: Fixed lining plate type box type heating furnace and its hot forming sectional strengthening process Effective date of registration: 20210204 Granted publication date: 20170315 Pledgee: Jiangsu Credit Financing Guarantee Co.,Ltd. Pledgor: YANCHENG KEAO MECHANICAL Co.,Ltd. Registration number: Y2021980001033 |
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Date of cancellation: 20220209 Granted publication date: 20170315 Pledgee: Jiangsu Credit Financing Guarantee Co.,Ltd. Pledgor: YANCHENG KEAO MECHANICAL CO.,LTD. Registration number: Y2021980001033 |
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Denomination of invention: Fixed lining plate van type heating furnace and its thermoforming sectional strengthening process Effective date of registration: 20220210 Granted publication date: 20170315 Pledgee: Jiangsu Credit Financing Guarantee Co.,Ltd. Pledgor: YANCHENG KEAO MECHANICAL CO.,LTD. Registration number: Y2022980001432 |
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Granted publication date: 20170315 Pledgee: Jiangsu Credit Financing Guarantee Co.,Ltd. Pledgor: YANCHENG KEAO MECHANICAL CO.,LTD. Registration number: Y2022980001432 |
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Denomination of invention: Fixed lining plate box type heating furnace and its hot forming segmented strengthening process Granted publication date: 20170315 Pledgee: Bank of Nanjing Co.,Ltd. Yancheng branch Pledgor: YANCHENG KEAO MECHANICAL CO.,LTD. Registration number: Y2024980001631 |