CN204724665U - A kind of die shoe producing the mould of intensity adjustable thermoforming part - Google Patents
A kind of die shoe producing the mould of intensity adjustable thermoforming part Download PDFInfo
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- CN204724665U CN204724665U CN201520462831.0U CN201520462831U CN204724665U CN 204724665 U CN204724665 U CN 204724665U CN 201520462831 U CN201520462831 U CN 201520462831U CN 204724665 U CN204724665 U CN 204724665U
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- forming blocks
- temperature
- cooling water
- controller
- district forming
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Abstract
The utility model relates to thermo forming fields, disclose a kind of die shoe producing the mould of intensity adjustable thermoforming part, die shoe forming blocks comprises at least one weak district forming blocks (21) and at least one high district forming blocks (22), weak district forming blocks (21) is pressed abd fixed on temperature control block (6) top, assisted heating device (3) and temperature-detecting device (4) to be all fixed in weak district forming blocks (21) and to be all electrically connected with temperature controller (5), and temperature controller (5) is all connected with master controller (1) signal with flow speed controller (7); Cooling water generator (8) is communicated with the cooling water pipe (221) in high district forming blocks (22), and cooling water generator (8) is also communicated with the cooling water pipe (61) in temperature control block (6) by flow speed controller (7).The utility model controls flexibly effectively the regional temperature that varying strength in part requires, transitional region is narrow, can avoid part rejection as far as possible.
Description
Technical field
The utility model relates to thermo forming fields, particularly a kind of die shoe producing the mould of intensity adjustable thermoforming part.
Background technology
Intensity adjustable thermoforming part, refers to and there is different intensity area in same thermoforming part.As in partial automobile part, wish in Same Part, subregion tensile strength is greater than 1300MPa, to realize the intensity of superelevation; And another part field strength is less than 800MPa, to realize regional area weakening strength, and then realize clashing into crumple and absorbing impact energy.
Usually use the raw material that the boron steel that a kind of trade mark is 22MnB5 is produced as thermoforming at present, tensile strength is about 600MPa, and microstructure is ferrite-pearlite.As shown in Figure 1, during production, first raw-material coiled material is gone out required sheet material shape through blanking operation stamping-out; Then by automatic mechanical hand, sheet material is sent in heating furnace; In heating furnace, sheet material is heated to 930 DEG C ~ 950 DEG C and is incubated at least 5min and makes its lasting austenitizing; The sheet material of red heat is passed in mould through the automation conveyer of production line and carries out punching press, and passing time is about 8s, and carry out Cooling Quenching through mould inside that is cold, that close and carry out pressurize, the dwell time is about 8 ~ 12 s, and pressure is about 40MPa; Now cooldown rate exceedes minimum critical speed 27K/s, and when being cooled fast to temperature lower than 400 DEG C, material carries out sufficient martensitic structure transformation, obtains the thermoforming part of tensile strength up to the high strength of 1500MPa, high rigidity, low resilience.
The CCT curve of 22MnB5 thermoforming material as shown in Figure 2, is schemed known thus, uses different cooldown rates to cool this thermoforming material and can obtain different Fine Texture of Materials, and diverse microcosmic organizes content in the product different.Along with the increase of cooldown rate, the material hardness obtained also improves thereupon.In current thermoforming production process, the cooling velocity of part is made to be less than quenching critical speed 27K/S by the cooling water flow velocity controlling mould, the material phase transformation in forming parts process is made to avoid entering austenite+Bainite Region (in figure A+B), ensure that material carries out martensitic traoformation (in figure M) fully, obtain the product material hardness, yield strength and the tensile strength that require.
By analyzing thermoforming material CCT curve above, we may safely draw the conclusion: in theory, and by controlling the rate of temperature fall of material, we can obtain different Fine Texture of Materials.Consider the factor such as plate heating, plate transmission, punching press quenching in thermoforming production process, and cooling velocity about 10 ~ 15 DEG C/S when the sheet material raw material of red heat exposes in atmosphere, sheet material raw material exposes Homogeneous cooling in aerial process and can not obtain the material property of expection.
Although there is the method much controlling sheet material raw material regional area cooldown rate now, mostly cannot accurately control, effect is bad.
Utility model content
utility model object:for problems of the prior art, the utility model provides a kind of die shoe producing the mould of intensity adjustable thermoforming part, and the regional temperature different to requirement of strength controls flexibly effectively, and transitional region is narrow, can avoid part rejection as far as possible.
technical scheme:the utility model provides a kind of method of producing intensity adjustable thermoforming part, comprises following steps: S1: will be used for processing the sheet material heating raw materials of described intensity adjustable thermoforming part to T
1~ T
2dEG C and be incubated at least t
1min, makes its complete austenitizing; S3: in the process of described punching press, will need the region of being processed into high strength to be greater than the cooldown rate V of the quenching critical speed V of described sheet material raw material in described sheet material raw material
1be quickly cooled to and be less than T
3dEG C, only be there is the high intensity region of martensite microstructure; To in described sheet material raw material, need the region of being processed into weak intensity to be less than the cooldown rate V of described V
2be cooled to T
4~ T
5dEG C, be there is the weak intensity region of austenite, bainite and/or pearlite microstructure simultaneously; S4: pressurize preset time period t
2rear end punching press, obtains described intensity adjustable thermoforming part.
The utility model additionally provides a kind of die shoe producing the mould of intensity adjustable thermoforming part, comprises master controller, die shoe forming blocks, assisted heating device, temperature-detecting device, temperature controller, temperature control block, flow speed controller and cooling water generator; Described die shoe forming blocks comprises at least one weak district forming blocks and at least one high district forming blocks, described weak district forming blocks is pressed abd fixed on above described temperature control block, described assisted heating device and described temperature-detecting device to be all fixed in described weak district forming blocks and to be all electrically connected with described temperature controller, and described temperature controller and described flow speed controller are all connected with described master controller signal; Described cooling water generator is communicated with the cooling water pipe in described high district forming blocks, and described cooling water generator is also communicated with the cooling water pipe in described temperature control block by described flow speed controller.
Further, the die shoe of the mould of described production intensity adjustable thermoforming part also comprises heat-insulation layer, and described heat-insulation layer is wrapped in the sidewall one week of described weak district forming blocks.
Further, described assisted heating device comprises heater strip, Heat Conduction Material and cable, and it is outside that described Heat Conduction Material is wrapped in described heater strip, and described heater strip is electrically connected with described temperature controller by described cable.
Preferably, the boron steel of described sheet material raw material to be the trade mark be 22MnB5; Described T
1=900, described T
2=950, described t
1=5, described V=27k/s, described T
3=400 DEG C, described T
4=400 DEG C, described T
5=500 DEG C, described t
2=8 ~ 12s.
Preferably, the weak intensity region in described intensity adjustable thermoforming part and the transitional region width between high intensity region are 20 ~ 50mm.
operation principle and beneficial effect:when intensity adjustable thermoforming part produced by needs, first by the complete austenitizing of sheet material raw material, while by sheet material raw material austenitizing, control assisted heating device by temperature controller and weak district forming blocks is heated to T
4~ T
5dEG C, then the sheet material raw material of red heat is transferred in the die shoe forming blocks of mould, and ensure to need the region of being processed into high strength to be placed on above die shoe forming blocks Zhong Gao district forming blocks, to need the region of being processed into weak intensity to be placed on the top of weak district forming blocks in sheet material raw material, then punching press is carried out to it, in the process of punching press, a part for the cooling water that cooling water generator occurs flows in the cooling water pipe in high district forming blocks with certain flow velocity, and this flow velocity is wanted to ensure V
1> V, only can be had the high intensity region of martensite microstructure after ensureing to cool; Another part cooling water that cooling water generator occurs first flows in the cooling water pipe in the temperature control block below weak district forming blocks again after flow speed controller coutroi velocity, and the flow velocity of the cooling water after flow speed controller controls is wanted to ensure V
2< V, can be had the weak intensity region of austenite, bainite and/or pearlite microstructure after ensureing to cool, in order to ensure the material property in weak intensity region, the sheet material material temperature in this region will remain on T always simultaneously
4~ T
5dEG C, this temperature range is coordinated by master controller, assisted heating device, temperature-detecting device, temperature controller and flow speed controller to realize, and control mode is as follows: when temperature-detecting device detects that the sheet material material temperature of weak district forming blocks is less than T
4time, temperature controller just can control assisted heating device and heat weak district forming blocks, to heat the sheet material raw material above weak district forming blocks, simultaneously master controller can reduce the flow velocity of the cooling water that cooling water generator occurs by coutroi velocity controller, namely reduces V
2; When temperature is greater than T
4be less than T
5time, temperature controller can control assisted heating device and stop heating, and master controller can the constant flow rate of the coutroi velocity controller cooling water that keeps cooling water generator to occur, namely keeps V as far as possible
2constant; When temperature is greater than T
5time, master controller can increase the flow velocity of the cooling water that cooling water generator occurs by coutroi velocity controller, namely increases V
2, but to V be kept all the time
2be less than V; Visible, by the Lower die base structure of the utility model mould, can the sheet material contact raw of high temperature to normal temperature weak district forming blocks before just weak district forming blocks is first heated to T by room temperature
4~ T
5within the scope of DEG C, avoid the sheet material contact raw of heat to occur cracking to the weak district forming blocks of normal temperature, reduce part rejection rate; And water velocity in high district forming blocks in cooling water pipe is always very high, so to the cooling velocity of the high temperature sheet raw material contacted with high district forming blocks quickly, the temperature of the two contact Hou Gao district forming blocks can reduce very soon, the two temperature difference is not too large, negligible, therefore also can not cause sheet material raw material and scrap impact; The main purpose of above-mentioned temperature control process is to ensure that the material property machining rear weak intensity region sheet material raw material meets expection.Visible by the description of said process, by method and apparatus in the utility model with the use of, can to the temperature of die shoe forming blocks Zhong Ruo district forming blocks and cooldown rate V
2carry out accurately, in time, effectively controlling, and then carry out accurately, in time, effectively controlling to the temperature of the sheet material raw material above weak district forming blocks and cooldown rate, the intensity adjustable thermoforming part be processed into can be got a desired effect, narrow between the transition zone in part between high intensity region and weak intensity region.
Accompanying drawing explanation
Fig. 1 is the flow chart that hot pressing is produced;
The CCT curve of Fig. 2 to be the trade mark be boron steel of 22MnB5;
Fig. 3 be the mould producing intensity adjustable thermoforming part in the utility model die shoe and sheet material raw material in conjunction with time sectional view;
Fig. 4 is the structural representation of sheet material raw material;
Fig. 5 is the structural representation of the intensity adjustable thermoforming part using the sheet material raw material in Fig. 4 to produce by method of the present utility model and Lower die base structure.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in detail.
embodiment 1:
Present embodiments provide for a kind of die shoe producing the mould of intensity adjustable thermoforming part, as shown in Figure 3, die shoe forming blocks is divided into high district forming blocks 22 and weak district forming blocks 21 two parts (also can be divided into multiple high districts forming blocks 22 and multiple weak districts forming blocks 21, only to comprise a Ge Gao district forming blocks 22 and a Ge Ruo district forming blocks 21 is described in present embodiment), cooling water pipe 221 is provided with in high district forming blocks 22, and this cooling water pipe 221 is directly communicated with cooling water generator 8, the cooling water pipe 61 of weak district forming blocks 21 is arranged in the temperature control block 6 below weak district forming blocks 21, and this cooling water pipe 61 is communicated with cooling water generator 8 by a flow speed controller 7, two assisted heating devices 3 and a temperature-detecting device 4 is also fixed with on the top of weak district forming blocks 21, assisted heating device 3 is by heater strip, Heat Conduction Material and cable composition, Heat Conduction Material is wrapped in heater strip outside, heater strip be positioned at the sheet material raw material 11 of forming blocks 21 top, weak district near thermoforming part with it on the contact surface of profile, heater strip is electrically connected with temperature controller 5 by cable, temperature-detecting device 4 is also electrically connected with temperature controller 5, temperature in the weak district forming blocks 21 that temperature controller 5 feeds back according to temperature-detecting device 4 carries out computer heating control to assisted heating device 3, temperature convection speed controller 7 in the weak district forming blocks 21 that master controller 1 also can feed back according to temperature controller 5 controls, and then flow speed controller 7 can control the flow velocity of the cooling water that cooling water generator 8 occurs.
When using this mould to carry out work, first the sheet material raw material 11 being used for processing intensity adjustable thermoforming part is heated to preset temperature range T
1~ T
2dEG C and be incubated t
1min, make sheet material raw material 11 complete austenitizing, while by sheet material raw material 11 complete austenitizing, the weak district forming blocks 21 that temperature controller 5 controls assisted heating device 3 pairs of room temperatures carries out auxiliary heating, in the process, the flow velocity of cooling water is adjusted to less scope by the flow speed controller 7 be connected with temperature control block 6, to reduce the loss of heat, until the temperature of weak district forming blocks 21 reaches T
4~ T
5after DEG C, the temperature that temperature-detecting device 4 feeds back weak district forming blocks 21 arrives T
4~ T
5temperature controller 5 controls assisted heating device 3 and stops heating, now again the sheet material raw material 11 of red heat complete austenitizing is transferred in this mould and carry out punching press, sheet material raw material 11 is being put in the process in die shoe forming blocks, should be noted that and will in sheet material raw material 11, need the region of being processed into high strength to be placed on above high district forming blocks 22, to the region of being processed into weak intensity be needed to be placed on above weak district forming blocks 21, start after placing to carry out punching press to sheet material raw material 11.
In the process of above-mentioned punching press:
(1) cooling water of the quick flowing occurred by cooling water generator 8 abrim in the cooling water pipe 221 of forming blocks 22 inside, high district, so that the heat of the sheet material raw material 11 contacted with high district forming blocks 22 can be taken away rapidly, the cooldown rate V of the sheet material raw material 11 above Shi Gao district forming blocks 22
1the critical cooling rate V being greater than this sheet material raw material 11 that can be stable, is cooled at sheet material raw material 11 and is less than T
3namely obtain the microstructure of abundant formation of martensite below DEG C, obtain high material property and part strength;
(2) in weak district forming blocks, in order to the material property and part strength that ensure the sheet material raw material 11 above weak district forming blocks 21 are weaker than the sheet material raw material 11 above high district forming blocks 22, need during production to keep the temperature of weak district forming blocks 21 always at T
4~ T
5within the scope of DEG C, in order to ensure this point, present embodiment can also note the end face (with the profile of thermoforming feature contacts) of weak district forming blocks 21 with bottom surface (face contacted with temperature control block 6) without the need to wrapping up heat-insulation layer at the sidewall surrounding parcel one layer of heat preservation floor 9(of weak district forming blocks 21); In addition, machining in the sheet material raw material 11 above Hou Ruo district forming blocks 21 owing to needing to ensure there is austenite and bainite or mix the pearlite of part, to ensure that corresponding material property and part strength are weaker than high intensity region 22, then need to control sheet material raw material 11 above weak district forming blocks 21 touching the cooldown rate V after weak district forming blocks 21
2be less than V.Present embodiment is in the following manner to above-mentioned T
4, T
5and V
2control:
When temperature-detecting device 4 detects that the temperature of weak district forming blocks 21 is less than T
4time, temperature controller 5 heats weak district forming blocks 21 with regard to controlling assisted heating device 3, heat the sheet material raw material 11 above weak district forming blocks 21 with indirect, master controller 1 coutroi velocity controller 7 reduces the flow velocity of the cooling water that cooling water generator 8 occurs simultaneously, namely reduces V
2; When temperature is greater than T
4be less than T
5time, temperature controller 5 controls assisted heating device 3 and stops heating, and the constant flow rate of the cooling water that master controller 1 coutroi velocity controller 7 keeps cooling water generator 8 to occur, namely keeps V as far as possible
2constant; When temperature is greater than T
5time, temperature controller 5 controls assisted heating device 3 and stops heating, and master controller 1 coutroi velocity controller 7 increases the flow velocity of the cooling water that cooling water generator 8 occurs, and namely increases V
2, but to V be kept all the time
2be less than V; The main purpose of above-mentioned temperature control process is to ensure that the material property of the sheet material raw material 11 machining rear weak intensity region meets expection.According to set T
4and T
5difference, microstructure in sheet material raw material 11 above weak district forming blocks 21 has corresponding change, it is few that content due to now martensite microstructure compares high intensity region, and the material property of the sheet material raw material 11 therefore above weak district forming blocks 21 and part strength are weaker than material property and the part strength of the sheet material raw material 11 above high district forming blocks 22 accordingly.
(3) above-mentioned (1) and (2) process are over time, and high district forming blocks 22 and weak district forming blocks 21 all reach stable poised state, pressurize preset time t
2rear end punching press, obtains intensity adjustable thermoforming part.
As shown in Figures 4 and 5, the width range of the transitional region 10 between the high intensity region of above-mentioned intensity adjustable thermoforming part and weak intensity region can control within 20 ~ 50mm.
embodiment 2:
Present embodiment for sheet material raw material for the boron steel that the trade mark is 22MnB5 is described.
First boron steel sheet material be heated to 900 ~ 950 DEG C and be incubated at least 5min, make the complete austenitizing of boron steel sheet material, simultaneous temperature controller 5 controls assisted heating device 3 and carries out auxiliary heating to weak district forming blocks 21, in the process of heating, the flow velocity of cooling water is down to lower level by master controller 1 coutroi velocity controller 7, to avoid cooling water to be taken away by heat, after the temperature from ambient of weak district forming blocks 21 rises to 400 ~ 500 DEG C, temperature controller 5 controls assisted heating device 3 and terminates heating; Then boron steel sheet material is transferred in the die shoe forming blocks in embodiment 1 and carry out punching press, transmittance process continues 8s, and ensure in boron steel sheet material, to need the region of being processed into high strength to be placed on above high district forming blocks 22, need the region of being processed into weak intensity to be placed on above weak district forming blocks 21, after placing, start punching press; In the process of punching press: (1) is 221 cooling waters being full of the quick flowing occurred by cooling water generator 8 in the cooling water pipe of forming blocks 22 inside, high district, the critical cooling rate 27k/s being greater than boron steel that the cooldown rate of the boron steel sheet material 11 above Shi Gao district forming blocks 22 is stable, under above-mentioned cooldown rate, the boron steel sheet material 11 above high district forming blocks 22 is quickly cooled to lower than 400 DEG C; (2) in weak district forming blocks 21, when the boron steel sheet material of hot thermalization complete austenitizing has just touched weak district's forming blocks 21, because weak district forming blocks 21 temperature now (400 ~ 500 DEG C) is less than the temperature of boron steel sheet material (owing to having stopped 8s in atmosphere, so now temperature greatly about 700 DEG C), so the temperature of weak district forming blocks 21 can raise, when temperature-detecting device 4 detects that the temperature of weak district forming blocks 21 is greater than 500 DEG C, master controller 1 increases the flow velocity of the cooling water that cooling water generator 8 occurs with regard to coutroi velocity controller 7, namely increases V
2but, V be kept
2be less than 27k/s; When temperature-detecting device 4 detect the temperature of weak district forming blocks 21 be greater than 400 DEG C be less than 500 DEG C time, the constant flow rate of the cooling water that master controller 1 coutroi velocity controller 7 keeps cooling water generator 8 to occur, namely keeps V as far as possible
2constant; When temperature-detecting device 4 detects that the temperature of weak district forming blocks 21 is less than 400 DEG C, temperature controller 5 controls assisted heating device 3 and starts heating, and master controller 1 coutroi velocity controller 7 reduces the flow velocity of the cooling water that cooling water generator 8 occurs, and namely reduces V
2.Said process terminates punching press after continuing 8 ~ 12s, and the tensile strength of the boron steel sheet material 11 that the tensile strength obtaining the boron steel sheet material 11 above high district forming blocks 22 is about above 1500MPa, weak district forming blocks 21 is about the intensity adjustable thermoforming boron steel part of 800MPa.
Above-mentioned embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalent transformations of doing according to the utility model Spirit Essence or modification, all should be encompassed within protection domain of the present utility model.
Claims (4)
1. produce the die shoe of the mould of intensity adjustable thermoforming part for one kind, it is characterized in that, comprise master controller (1), die shoe forming blocks (2), assisted heating device (3), temperature-detecting device (4), temperature controller (5), temperature control block (6), flow speed controller (7) and cooling water generator (8); Described die shoe forming blocks comprises at least one weak district forming blocks (21) and at least one high district forming blocks (22), described weak district forming blocks (21) is pressed abd fixed on described temperature control block (6) top, described assisted heating device (3) and described temperature-detecting device (4) to be all fixed in described weak district forming blocks (21) and to be all electrically connected with described temperature controller (5), and described temperature controller (5) is all connected with described master controller (1) signal with described flow speed controller (7); Described cooling water generator (8) is communicated with the cooling water pipe (221) in described high district forming blocks (22), and described cooling water generator (8) is also communicated with the cooling water pipe (61) in described temperature control block (6) by described flow speed controller (7).
2. the die shoe of the mould of production intensity adjustable thermoforming part according to claim 1, is characterized in that, also comprise heat-insulation layer (9), and described heat-insulation layer (9) is wrapped in the sidewall one week of described weak district forming blocks (21).
3. the die shoe of the mould of production intensity adjustable thermoforming part according to claim 1, it is characterized in that, described assisted heating device (3) comprises heater strip, Heat Conduction Material and cable, it is outside that described Heat Conduction Material is wrapped in described heater strip, and described heater strip is electrically connected with described temperature controller by described cable.
4. the die shoe of the mould of the production intensity adjustable thermoforming part according to any one of claim 1 ~ 3, is characterized in that, the weak intensity region in described intensity adjustable thermoforming part and transitional region (10) width between high intensity region are 20 ~ 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520462831.0U CN204724665U (en) | 2015-07-01 | 2015-07-01 | A kind of die shoe producing the mould of intensity adjustable thermoforming part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520462831.0U CN204724665U (en) | 2015-07-01 | 2015-07-01 | A kind of die shoe producing the mould of intensity adjustable thermoforming part |
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| Publication Number | Publication Date |
|---|---|
| CN204724665U true CN204724665U (en) | 2015-10-28 |
Family
ID=54383048
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520462831.0U Expired - Fee Related CN204724665U (en) | 2015-07-01 | 2015-07-01 | A kind of die shoe producing the mould of intensity adjustable thermoforming part |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252896A (en) * | 2019-07-18 | 2019-09-20 | 上海凌云汽车模具有限公司 | A kind of quenching technical and its hot forming tool of thermoformed part |
-
2015
- 2015-07-01 CN CN201520462831.0U patent/CN204724665U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110252896A (en) * | 2019-07-18 | 2019-09-20 | 上海凌云汽车模具有限公司 | A kind of quenching technical and its hot forming tool of thermoformed part |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20151028 Termination date: 20210701 |