CN105094176B - A kind of method for determining austenitic stainless steel end socket temperature punching press heating-up temperature - Google Patents
A kind of method for determining austenitic stainless steel end socket temperature punching press heating-up temperature Download PDFInfo
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Abstract
The present invention relates to head pressing manufacturing technology, it is desirable to provide a kind of method of determination austenitic stainless steel end socket temperature punching press heating-up temperature.The method is to carry out end socket temperature punching press trial test to austenite stainless steel plate material by predetermined dimension, calculates control parameter k according to warm extrusion die formula；The parameter is used for the austenitic stainless steel end socket to be processed of specification and material all same again to calculate the heating-up temperature of plate.Basis source of the present invention is suitable for the austenite stainless steel end socket of all different sizes using warm sheet metal forming technology shaping in the research to unsteady-state heat transfer mechanism.After control parameter k of austenite stainless steel end socket temperature punching press of given specification is obtained, the warm punching press heating-up temperature of the specification end socket can be according to the present invention by being simply calculated.The application of the present invention can ensure that the temperature in punching course at head skirt section to be consistently higher than at a temperature of requirement and limit.Have and calculate accurately, simple to operate, technical feasibility can directly apply to the advantage of industry spot etc..
Description
Technical field
The present invention relates to head pressing manufacture field, and in particular to a kind of determination austenitic stainless steel end socket temperature punching press heating
The method of temperature, is that one kind considers in austenite stainless steel end socket temperature punching course the temperature drop of head skirt section (below
Abbreviation temperature drop) constant temperature punching press heating-up temperature really method.
Background technology
Austenitic stainless steel has good corrosion resistance, plasticity, toughness because of which, is widely used in pressure vessel, pot
Stove, the manufacture of nuclear power generating equipment.By taking pressure vessel as an example, in fields such as new forms of energy, medicine, food processings, the kind equipment has in a large number
Application, such as be used for storing in new energy field the tank car of the cryogenic gases such as liquid oxygen, liquid nitrogen and liquefied natural gas, tank car and
Strain hardening container, is used for fermentation tank of brewing etc. in field of food.As can be seen here, austenitic stainless steel pressure vessels and
Its corresponding part has huge demand in numerous areas.End socket is important as the main equipments such as pressure vessel, boiler
Part, its demand increase, this production in enormous quantities just to end socket with the growth of the demand of the equipment such as pressure vessel, boiler
And products thereof quality propose higher requirement.
Metastable state austenitic stainless steel can deform upon strain induced martensite phase transformation during head pressing, and this can be to end socket
The mechanical property generation impact of material, or even cause the failure of end socket, cause potential safety hazard.It has been investigated that, by improving temperature
Temperature during shaping, can effectively reduce martensitic phase variable during seal head forming, to ensure end socket performance.
At present, factory often reheats plate after punching course carries out half to realize warm punching press, and its firing equipment is spray
Rifle, uses infrared thermometer detection temperature.
However, only heated a part for plate in warm punching course, therefore there is the temperature difference in plate in itself.Simultaneously as
Punch, die, blank holder temperature substantially consistent with ambient temperature, therefore can exist between plate and mould in warm punching course
Heat transfer, these have resulted in the decline of plate temperature in punching course, if ambient temperature is relatively low, or the punching press time compared with
Long, then the temperature drop amplitude of plate becomes big, and this may result in, and press temperature is not high enough, and in punching course, plate deforms upon induction horse
Family name's body phase becomes, end socket hydraulic performance decline.For the end socket of different size, rationally determine heating-up temperature, be the key of warm Sheet Metal Forming Technology
It is located.
Currently, factory is may be referred to without theoretical foundation, can only lean on production for many years when warm punching press heating-up temperature is determined
Experience guesses heating-up temperature, there is very big blindness.If temperature selection is unreasonable, dissipate due to contacting in actual punching course
There is temperature drop in the reasons such as heat, plate, cause that Sheet Metal Stamping Process is temperature required cannot to be met, and end socket performance is difficult to ensure that, and then
It is difficult to the advantage for having given play to warm punching press.If forethought to after ambient temperature, plate heating starts to be stamped into punching press terminating
The impact to temperature drop of time (hereinafter referred to as punching press time), initial heating temperature these three principal elements, understand head pressing
During temperature drop law, temperature drop scope, so that it is determined that rational initial heating temperature, it is ensured that in punching course, plate temperature is full
Foot is required, then can be provided safeguard for the quality of end socket product.
Content of the invention
The technical problem to be solved in the present invention is to overcome
Deficiency, there is provided a kind of method of determination austenitic stainless steel end socket temperature punching press heating-up temperature.
For solving the technical problem, solution of the present invention is：
A kind of method for determining austenitic stainless steel end socket temperature punching press heating-up temperature is provided, is comprised the following steps：
(1) end socket temperature punching press trial test is carried out to austenite stainless steel plate material by predetermined dimension, record the environment before punching press
Temperature Th, after heating plate temperature Tj, start to be stamped into head skirt section after the completion of the time t, punching press that punching press terminates after heating
Temperature Tend；
(2) according to warm extrusion die formula Tend-Th/Tj-Th=exp-k t calculate control parameter k, the T in formulah、Tj、t、
TendIt is test in step (1) to obtain；
(3) for specification and the austenitic stainless steel end socket to be processed of material all same, plate is calculated according to following formula
Heating-up temperature Tj′：
Tj'=Tend′-Th′/exp-k·t′+Th′
In formula, Th' for the ambient temperature before punching press, it is the parameter that can measure acquisition before end socket temperature punching operation is carried out；
T ' and Tend' be respectively after heating start to be stamped into punching press and terminate time, after the completion of punching press head skirt section temperature, be
The parameter that just can determine that before end socket temperature punching operation is carried out；Control parameter k obtains (control parameter k and environment temperature by step (2)
The factors such as degree, punching press time are unrelated, are solely dependent upon plate size and material).
Invention further provides a kind of austenitic stainless steel end socket temperature process for stamping, comprises the following steps：
(1) by the specification of austenitic stainless steel end socket to be processed, end socket temperature punching press prerun is carried out with the sheet material of identical material
Test, record ambient temperature T before punching pressh, after heating plate temperature Tj, start after heating to be stamped into time t that punching press terminates,
Temperature T of head skirt section after the completion of punching pressend；
(2) according to warm extrusion die formula Tend-Th/Tj-Th=exp-k t calculate control parameter k, the T in formulah、Tj、t、
TendIt is test in step (1) to obtain；
(3) according to formula Tj'=Tend′-Th′/exp-k·t′+Th' it is calculated heating-up temperature T of platej′；In formula,
Th' for the ambient temperature before punching press, it is the parameter that can measure acquisition before end socket temperature punching operation is carried out；T ' and Tend' be respectively
Start to be stamped into after heating the temperature of head skirt section after the completion of the time, punching press that punching press terminates, being is carrying out end socket Wen Chong
The parameter that just can determine that before press operation；Control parameter k obtains (control parameter k and ambient temperature, punching press time etc. by step (2)
Factor is unrelated, is solely dependent upon plate size and material)；
(4) end socket temperature punching operation is carried out to plate, obtain the austenitic stainless steel end socket of predetermined dimension；End socket temperature punching press
During control plate heating-up temperature be not less than T in step (3)j' numerical value.
In the present invention, the concrete operations flow process of the end socket temperature punching press is：
A () plate is positioned on die by mechanical chuck；
B () punch and upper blank holder are moved down simultaneously, upper blank holder compresses plate；
C () punch undershoot plate is to being close to half depth (as shown in Figure 1)；
D () punch and upper blank holder are simultaneously upper to move, and the plate for having deformed propped up by support, heats plate with spray gun at the scene
Excircle part to set point of temperature is not less than, with infrared thermometer detection temperature；
E () plate resets, upper blank holder, punch are moved down simultaneously, until upper blank holder compresses plate；
F () punch undershoot is until setpoint distance；
G () punching press is finished, punch and upper blank holder are above moved simultaneously, and end socket is propped up by support, and is transported to finger by plant equipment
Determine place.
The present invention considers the impact of the factors such as site environment temperature, punching press time, heating-up temperature, by end socket Wen Chong
Pressure carries out Study on Numerical Simulation, finds the macroparameter related to temperature drop in punching course, and is achieved in heating warm punching press
The determination of temperature.
Compared with prior art, the invention has the beneficial effects as follows：
(1) the determination method of the middle temperature punching press heating-up temperature of the present invention, its Main Basis are derived to unsteady-state heat transfer mechanism
Research, it is adaptable to the austenite stainless steel end socket of all different sizes using warm sheet metal forming technology shaping.Given
After control parameter k of the austenite stainless steel end socket temperature punching press of set pattern lattice, the warm punching press heating-up temperature of the specification end socket can be according to
According to the present invention by being simply calculated.
(2) application of the inventive method, can make workman before warm punching press is carried out according to required punching press lowest temperature
Degree Tend, punching press time t and ambient temperature ThTo determine the heating-up temperature in punching course, so that it is guaranteed that sealing in punching course
Temperature at head straight section is consistently higher than at a temperature of requirement and limits.Have and calculate accurately, simple to operate, technical feasibility can be directly
It is applied to the advantage of industry spot etc..
Description of the drawings
Fig. 1 is end socket temperature punching press schematic diagram.
Reference in figure：On 1, blank holder, 2 punch, 3 dies, 4 plates, 5 heating parts are (after the completion of punching press, as envelope
Head straight section position).
Specific embodiment
Calculated and end socket temperature with the warm punching press heating-up temperature of domestic typical austenitic stainless steel S30408 material end sockets below
As a example by punching operation, to the master based on the theoretical austenitic stainless steel end socket temperature punching press heating-up temperature Forecasting Methodology of unsteady-state heat transfer
Process is wanted to be described further：
(1) by taking the standard oval austenitic stainless steel end socket of EHA550 × 6 as an example, interior diameter is 550mm, thickness
For 6mm, end socket temperature punching press trial test is carried out, 74 DEG C of the temperature of plate, heating after 30 DEG C of the ambient temperature, heating before record punching press
Start afterwards to be stamped into time 13s, 53 DEG C of the temperature of punching press rear head straight section that punching press terminates；
(2) by Th=30 DEG C, Tj=74 DEG C, t=13s, Tend=53 DEG C, bring warm extrusion die formula into
Tend-Th/Tj-Th=exp-k t
Try to achieve control parameter k=0.0499；
(3) for the austenitic stainless steel end socket of same size and material, control parameter k value is identical.If it is desired to Wen Chong
Temperature T at head skirt section after the completion of pressureend' 60 DEG C are not less than, start to be stamped into time t '=13s that punching press terminates after heating,
In-site measurement ambient temperature Th'=30 DEG C, then according to formula Tj'=Tend′-Th′/exp-k·t′+Th', institute can be calculated
Heating-up temperature T for needingj' 87 DEG C should be not less than；
(4) the concrete operations flow process of end socket temperature punching press is：
A () plate 4 is positioned on die 3 by mechanical chuck；
B () punch 2 and upper blank holder 1 are moved down simultaneously, upper blank holder 1 compresses plate 4；
2 undershoot plate 4 of (c) punch to half depth is close to, as shown in Figure 1；
D the upper shifting simultaneously of () punch 2 and upper blank holder 1, support are propped up the plate 4 for having deformed, are heated with spray gun at the scene
The excircle part (heating part 5 i.e. in figure) of plate 4 to set point of temperature is not less than, with infrared thermometer detection temperature；
E () plate 4 resets, upper blank holder 1, punch 2 are moved down simultaneously, until upper blank holder 1 compresses plate 4；
F 2 undershoot of () punch is until setpoint distance；
G () punching press is finished, punch 2 and upper blank holder 1 are above moved simultaneously, and end socket is propped up by support, and is transported to by plant equipment
Appointed place.
In the present embodiment, the step of end socket temperature punching operation is carried out when (d), with the excircle part of spray gun heating plate
(heating part 5 i.e. in figure) just only need to control heating-up temperature is not less than 87 DEG C, you can ensure that plate temperature is full in punching course
Foot requirement, ensures end socket product quality.
Claims (3)
1. a kind of determine austenitic stainless steel end socket temperature punching press heating-up temperature method, it is characterised in that comprise the following steps：
(1) end socket temperature punching press trial test is carried out to austenite stainless steel plate material by predetermined dimension, record the ambient temperature before punching press
Th, after heating plate temperature Tj, start to be stamped into the temperature of head skirt section after the completion of the time t, punching press that punching press terminates after heating
Degree Tend；
(2) according to warm extrusion die formula (Tend-Th)/(Tj-Th)=exp (- k t) calculates control parameter k, the T in formulah、Tj、t、
TendIt is test in step (1) to obtain；
(3) for specification and the austenitic stainless steel end socket to be processed of material all same, adding for plate, is calculated according to following formula
Hot temperature Tj′：
Tj'=(Tend′-Th′)/exp(-k·t′)+Th′
In formula, Th' for the ambient temperature before punching press, it is the parameter that can measure acquisition before end socket temperature punching operation is carried out；T ' and
Tend' be respectively after heating start to be stamped into punching press and terminate time, after the completion of punching press head skirt section temperature, be and
The parameter that just can determine that before row end socket temperature punching operation；Control parameter k is obtained by step (2).
2. a kind of austenitic stainless steel end socket temperature process for stamping, it is characterised in that comprise the following steps：
(1) by the specification of austenitic stainless steel end socket to be processed, end socket temperature punching press trial test is carried out with the sheet material of identical material, is remembered
Ambient temperature T before record punching pressh, after heating plate temperature Tj, to start to be stamped into time t, punching press that punching press terminates after heating complete
Temperature T into rear head straight sectionend；
(2) according to warm extrusion die formula (Tend-Th)/(Tj-Th)=exp (- k t) calculates control parameter k, the T in formulah、Tj、t、
TendIt is test in step (1) to obtain；
(3) according to formula Tj'=(Tend′-Th′)/exp(-k·t′)+Th' it is calculated heating-up temperature T of platej′；In formula,
Th' for the ambient temperature before punching press, it is the parameter that can measure acquisition before end socket temperature punching operation is carried out；T ' and Tend' be respectively
Start to be stamped into after heating the temperature of head skirt section after the completion of the time, punching press that punching press terminates, being is carrying out end socket Wen Chong
The parameter that just can determine that before press operation；Control parameter k is obtained by step (2)；
(4) end socket temperature punching operation is carried out to plate, obtain the austenitic stainless steel end socket of predetermined dimension；End socket temperature punching course
The heating-up temperature of middle control plate is not less than T in step (3)j' numerical value.
3. method according to claim 1 and 2, it is characterised in that the concrete operations flow process of the end socket temperature punching press is：
A () plate is positioned on die by mechanical chuck；
B () punch and upper blank holder are moved down simultaneously, upper blank holder compresses plate；
C () punch undershoot plate is to being close to half depth；
D () punch and upper blank holder are simultaneously upper to move, and the plate for having deformed propped up by support, heats the outer of plate with spray gun at the scene
Circular portion to set point of temperature is not less than, with infrared thermometer detection temperature；
E () plate resets, upper blank holder, punch are moved down simultaneously, until upper blank holder compresses plate；
F () punch undershoot is until setpoint distance；
G () punching press is finished, punch and upper blank holder are above moved simultaneously, and end socket is propped up by support, and is transported to specified ground by plant equipment
Point.
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| CN110961516A (en) * | 2018-09-29 | 2020-04-07 | 佛山市顺德区美的电热电器制造有限公司 | Austenitic stainless steel kitchen ware and processing method thereof |
| CN110465595A (en) * | 2019-09-26 | 2019-11-19 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Stamping die and stamping device |
| CN113441645B (en) * | 2021-07-14 | 2022-04-19 | 湖南湘投金天科技集团有限责任公司 | Titanium alloy end socket and preparation method and application thereof |
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| CN101148741A (en) * | 2006-09-22 | 2008-03-26 | 宝山钢铁股份有限公司 | Thin belt continuous casting austenitic stainless steel belt and manufacturing method thereof |
| CN103350156A (en) * | 2013-06-28 | 2013-10-16 | 宜兴华威封头有限公司 | Warm-pressing forming process of stainless steel sealing head |
| CN103374685A (en) * | 2012-04-23 | 2013-10-30 | 钢铁研究总院 | Stainless steel material and manufacturing method thereof |
| CN104525672A (en) * | 2014-11-19 | 2015-04-22 | 宁波市普力升工贸有限公司 | Warm stretching technology of stainless steel stretching workpiece |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5679651B2 (en) * | 2009-12-01 | 2015-03-04 | 日新製鋼株式会社 | Punching method with reduced noise during breakthrough |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101148741A (en) * | 2006-09-22 | 2008-03-26 | 宝山钢铁股份有限公司 | Thin belt continuous casting austenitic stainless steel belt and manufacturing method thereof |
| CN103374685A (en) * | 2012-04-23 | 2013-10-30 | 钢铁研究总院 | Stainless steel material and manufacturing method thereof |
| CN103350156A (en) * | 2013-06-28 | 2013-10-16 | 宜兴华威封头有限公司 | Warm-pressing forming process of stainless steel sealing head |
| CN104525672A (en) * | 2014-11-19 | 2015-04-22 | 宁波市普力升工贸有限公司 | Warm stretching technology of stainless steel stretching workpiece |
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