CN104480256A - Heating device for segmented strengthening die for thermoforming boron steel workpiece - Google Patents
Heating device for segmented strengthening die for thermoforming boron steel workpiece Download PDFInfo
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- CN104480256A CN104480256A CN201410734186.3A CN201410734186A CN104480256A CN 104480256 A CN104480256 A CN 104480256A CN 201410734186 A CN201410734186 A CN 201410734186A CN 104480256 A CN104480256 A CN 104480256A
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Abstract
The invention relates to a heating device for a segmented strengthening die for thermoforming a boron steel workpiece. The heating device is connected with a thermoforming segmented strengthening die, the thermoforming segmented strengthening die comprises an upper die bolder and a lower die bolder, an upper die hard area forming insert and an upper die soft area forming insert are mounted on the lower surface of the upper die bolder, a lower die hard area forming insert and a lower die soft area forming insert are mounted on the upper surface of the lower die holder, soft area heating circuits are arranged at one sides, close to the work piece, on the upper die soft area forming insert and the lower die soft area forming insert, die heating elements are arranged in the soft area heating circuits and are connected with an electric appliance interconnecting device through cables, the electric appliance interconnecting device is connected with an electrical cabinet which is connected with the output end of a PLC control unit and outputs power to the die heating elements through the electric appliance interconnecting device, and the PLC control unit controls the heating efficiency of the heating element of each group of die. The heating device can control different temperatures of the die within different regions, so as to realize segmented strengthening for the workpiece.
Description
Technical field
The present invention relates to a kind of heating unit for thermoforming boron steel workpiece segmentation strengthening mould, belong to thermal treatment plastic forming technology field.
Background technology
Automobile boron steel, as one emerging superstrength thermoforming steel, for segmentation intensifying technology provides the same part of possibility, according to the needs of Automobile Design, can adopt different thermal treatment process in the different zones of this part, thus obtain varying strength and plasticity.The production technique of the soft district technology of thermoforming boron steel material is divided into 4 stages:
1) heat: boron steel steel plate and/or steel pipe are heated to the temperature required for thermal treatment;
2) transmit: boron steel steel plate and/or steel pipe are sent in mould to be punched;
3) be shaped: be at high temperature shaped by die stamping;
4) quench cooled: control different speed of cooling in different zones, can occur:
A) hard area cools (> 25 °s/sec) fast.From austenite microtexture to the transformation of martensite microtexture, obtain 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 °s/sec).By controlling different speed of cooling, in the process that austenite structure transforms, can Slow cooling, to the transformation of ferrite and pearlite microtexture, obtain intensity and hardness is higher, plasticity is good part; Also comparatively fast can cool, to the transformation of bainite microtexture, obtain intensity and hardness is very high, plasticity is moderate part.
The boron steel material typical case that can obtain varying strength and plasticity is divided into:
Table 1
| Sequence number | Material specification | Yield strength (Mpa) | Tensile strength (Mpa) | Unit 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 chemical composition that the most common one of such boron steel can reach 1500MPa intensity (HS1150) is:
Table 2
| C | Si | Mn | P | S | Cr | B | |
| min | 0.20 | 0.20 | 1.00 | - | - | 0.15 | 0.0015 |
| max | 0.25 | 0.35 | 1.30 | 0.025 | 0.015 | 0.25 | 0.0050 |
In existing production technology, the production technique for boron steel mostly is the solution of the single intensity of HS1150.Although the program can obtain the high material of intensity, in Automobile Design, in the design of particularly car collision protection, the intensity needing the mechanical property of workpiece to have in different zones and unit elongation.Such as, in the region that workpiece desired strength is high, require to use the material similar to HS1150 performance, but in some region, need workpiece to have better unit elongation, better energy-absorbing effect, the material that this area requirement uses HS400 performance similar.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of heating unit for thermoforming boron steel workpiece segmentation strengthening mould is provided, this device can in boron steel austenite quench cooled link, the different temperature of mould is controlled in different zones, and then control the speed of cooling of workpiece quenching, thus realize strengthening the segmentation of workpiece, within the scope of physical strength 500 ~ 1500MPa, need subregion to customize the mechanical property of workpiece according to product design.
According to technical scheme provided by the invention, the described heating unit for thermoforming boron steel workpiece segmentation strengthening mould, it is characterized in that: strengthen mould with thermoforming segmentation and be connected, thermoforming segmentation strengthening mould comprises upper bolster and die shoe, at upper bolster lower surface, patrix hard area shaping insert and patrix soft district's shaping insert are installed, at die shoe upper surface, counterdie hard area shaping insert and counterdie soft district's shaping insert are installed, in the bottom of described patrix hard area shaping insert and the top of counterdie hard area shaping insert, cooling water channel is set respectively, patrix soft district shaping insert and counterdie soft district shaping insert arrange the soft district heating paths for heating close to a side region of workpiece, in soft district heating paths, mold heated element is set, mold heated element is by cable connecting circuit interconnecting device, electrical equipment interconnecting device connects regulator cubicle, regulator cubicle is connected with the output terminal of PLC control unit, regulator cubicle passes through electrical equipment interconnecting device to mold heated element output rating, PLC control unit controls the heating efficiency often organizing mold heated element.
Further, the output terminal attended operation screen of described PLC control unit.
Further, at the two ends of described workpiece, end socket is set respectively, the front end of end socket contacts with the pipe end of workpiece, the rear end of end socket is connected with axial hydraulic system, at end socket center, high pressure gas path is set respectively, the front end of high pressure gas path is communicated with the inside of workpiece, and the rear end of high pressure gas path connects high pressure gas station.
Further, end socket path is arranged at the inner outline along end socket of described end socket.
Compared with prior art, the present invention has the following advantages:
(1) use hot forming production line of the present invention, the workpiece produced according to the needs of product design, at an arbitrary position, at tensile strength 500 ~ 1500MPa, can realize arbitrarily the mechanical property of workpiece in the scope of corresponding unit elongation 15 ~ 5%.
(2) the present invention uses separate control unit to control die temperature to workpiece different zones, controls more accurate, quality product and stability high;
(3) the present invention preferably by operation screen and PLC and thermoforming press equipment unified integrated, interface is more friendly, and communication efficiency is higher.
(4) for existing thermoforming press equipment, also can use the technology of the present invention, configure mold temp. controlling system separately, flexibility of operation is high;
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with concrete accompanying drawing, the invention will be further described.
As shown in Figure 1, the described heating unit for thermoforming boron steel workpiece segmentation strengthening mould comprises patrix hard area shaping insert 1, counterdie hard area shaping insert 2, patrix soft district shaping insert 3-1, counterdie soft district shaping insert 3-2, workpiece 4, high pressure gas path 5, end socket 6, cooling water channel 7, soft district heating paths 8, end socket path 9, cable 10, PLC control unit 11, electrical equipment interconnecting device 12, regulator cubicle 13, operation screen 14 etc.
As shown in Figure 1, the present invention and thermoforming segmentation are strengthened mould and are connected, thermoforming segmentation strengthening mould comprises upper bolster and die shoe, at upper bolster lower surface, patrix hard area shaping insert 1 and patrix soft district's shaping insert 3-1 are installed, at die shoe upper surface, counterdie hard area shaping insert 2 and counterdie soft district's shaping insert 3-2 are installed, in the bottom of described patrix hard area shaping insert 1 and the top of counterdie hard area shaping insert 2, cooling water channel 7 is set respectively, patrix soft district shaping insert 3-1 and counterdie soft district shaping insert 3-2 arrange the soft district heating paths 8 for heating close to a side region of workpiece 4, in soft district heating paths 8, mold heated element is set, mold heated element is by cable 10 connecting circuit interconnecting device 12, electrical equipment interconnecting device 12 connects regulator cubicle 13, regulator cubicle 13 is connected with the output terminal of PLC control unit 11, regulator cubicle 13 passes through electrical equipment interconnecting device 12 to mold heated element output rating, PLC control unit 11 controls the heating efficiency often organizing mold heated element,
The output terminal attended operation screen 14 of described PLC control unit 11, operation screen 14 can input the target heating temperature of mold heated element and the measurement tolerance of permission that PLC control unit 11 controls, Heating temperature preferably 350 ~ 650 DEG C, tolerance preferably ± 15 DEG C;
Mold heated element is connected with PLC control unit and regulator cubicle with detector unit by cable 10 by described electrical equipment interconnecting device 12, realizes the communication of detection signal and energy from regulator cubicle to the output of mould;
Described PLC control unit, according to the signal obtained from die temperature measuring element, regulates in real time to mold heated temperature; When certain regional temperature of mould exceedes the initial temperature tolerance zone of setting, this control unit of PLC controls regulator cubicle to be stopped to mold heated element input energy, and this region die temperature declines, and vice versa.The preferred 6-32 of separate control unit;
Described PLC control unit is preferably unified integrated with thermoforming press equipment, improves communication efficiency.
Described operation screen is preferably unified integrated with thermoforming press equipment, friendly man-machine interface.
Described regulator cubicle gross output mates according to the throughput such as workpiece size, thickness of heat forming equipment, preferably 30 ~ 200KW.
At the two ends of described workpiece 4, end socket 6 is set respectively, the front end of end socket 6 contacts with the pipe end of workpiece 4, the rear end of end socket 6 is connected with axial hydraulic system 13, the point diameter of end socket 6 is less than rear end diameter, at end socket 6 center at workpiece 4 two ends, high pressure gas path 5 is set respectively, the front end of high pressure gas path 5 is communicated with the inside of workpiece 4, and the rear end of high pressure gas path 5 connects high pressure gas station; Arrange end socket path 9 in described end socket 6 inside along the outline of end socket 6, end socket path 9 inside needs arrangement cooling water pipeline or mould an electric heating element (as heating rod) according to the technique that workpiece 4 material flows.
Claims (4)
1. the heating unit for thermoforming boron steel workpiece segmentation strengthening mould, it is characterized in that: strengthen mould with thermoforming segmentation and be connected, thermoforming segmentation strengthening mould comprises upper bolster and die shoe, at upper bolster lower surface, patrix hard area shaping insert (1) and patrix soft district's shaping insert (3-1) are installed, at die shoe upper surface, counterdie hard area shaping insert (2) and counterdie soft district's shaping insert (3-2) are installed, in the bottom of described patrix hard area shaping insert (1) and the top of counterdie hard area shaping insert (2), cooling water channel (7) is set respectively, patrix soft district shaping insert (3-1) and counterdie soft district shaping insert (3-2) arrange soft district heating paths (8) for heating close to a side region of workpiece (4), in soft district heating paths (8), mold heated element is set, mold heated element is by cable (10) connecting circuit interconnecting device (12), electrical equipment interconnecting device (12) connects regulator cubicle (13), regulator cubicle (13) is connected with the output terminal of PLC control unit (11), regulator cubicle (13) by electrical equipment interconnecting device (12) to mold heated element output rating, PLC control unit (11) controls the heating efficiency often organizing mold heated element.
2. as claimed in claim 1 for the heating unit of thermoforming boron steel workpiece segmentation strengthening mould, it is characterized in that: output terminal attended operation screen (14) of described PLC control unit (11).
3. as claimed in claim 1 for the heating unit of thermoforming boron steel workpiece segmentation strengthening mould, it is characterized in that: at the two ends of described workpiece (4), end socket (6) is set respectively, the front end of end socket (6) contacts with the pipe end of workpiece (4), the rear end of end socket (6) is connected with axial hydraulic system (13), at end socket (6) center, high pressure gas path (5) is set respectively, the front end of high pressure gas path (5) is communicated with the inside of workpiece (4), and the rear end of high pressure gas path (5) connects high pressure gas station.
4. as claimed in claim 3 for the heating unit of thermoforming boron steel workpiece segmentation strengthening mould, it is characterized in that: arrange end socket path (9) at the inner outline along end socket (6) of described end socket (6).
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| CN201410734186.3A CN104480256B (en) | 2014-12-08 | 2014-12-08 | Heater for hot forming boron steel workpiece segmentation strengthening mould |
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|---|---|---|---|
| CN201410734186.3A CN104480256B (en) | 2014-12-08 | 2014-12-08 | Heater for hot forming boron steel workpiece segmentation strengthening mould |
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| CN104480256A true CN104480256A (en) | 2015-04-01 |
| CN104480256B CN104480256B (en) | 2016-10-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927454A (en) * | 2017-05-26 | 2018-12-04 | 无锡朗贤轻量化科技股份有限公司 | The point heating mould and technique strengthened for the segmentation of hot forming boron steel material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009220141A (en) * | 2008-03-14 | 2009-10-01 | Marujun Co Ltd | Method and apparatus for manufacturing pipe product |
| CN103464607A (en) * | 2013-09-26 | 2013-12-25 | 哈尔滨工业大学（威海） | Modularized differential temperature forming hot punching mold |
| CN204281784U (en) * | 2014-12-08 | 2015-04-22 | 无锡朗贤汽车组件研发中心有限公司 | For the heating unit of thermoforming boron steel workpiece segmentation strengthening mould |
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2014
- 2014-12-08 CN CN201410734186.3A patent/CN104480256B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009220141A (en) * | 2008-03-14 | 2009-10-01 | Marujun Co Ltd | Method and apparatus for manufacturing pipe product |
| CN103464607A (en) * | 2013-09-26 | 2013-12-25 | 哈尔滨工业大学（威海） | Modularized differential temperature forming hot punching mold |
| CN204281784U (en) * | 2014-12-08 | 2015-04-22 | 无锡朗贤汽车组件研发中心有限公司 | For the heating unit of thermoforming boron steel workpiece segmentation strengthening mould |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927454A (en) * | 2017-05-26 | 2018-12-04 | 无锡朗贤轻量化科技股份有限公司 | The point heating mould and technique strengthened for the segmentation of hot forming boron steel material |
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| CN104480256B (en) | 2016-10-05 |
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Address after: 214115 Hongda Road, Wuxi City, Jiangsu Province, No. 111 Patentee after: Wuxi Lang Xian lightweight Polytron Technologies Inc Address before: 214115 Hongda Road, Wuxi City, Jiangsu Province, No. 111 Patentee before: Wuxi Co., Ltd of Lang Xian motor vehicle assembly research and development centre |