CN108856437A - A kind of method and apparatus of the compound timeliness stretcher strain of metal sheet Vibration Creep - Google Patents
A kind of method and apparatus of the compound timeliness stretcher strain of metal sheet Vibration Creep Download PDFInfo
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- CN108856437A CN108856437A CN201810969802.1A CN201810969802A CN108856437A CN 108856437 A CN108856437 A CN 108856437A CN 201810969802 A CN201810969802 A CN 201810969802A CN 108856437 A CN108856437 A CN 108856437A
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- vibration
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- metal sheet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/208—Deep-drawing by heating the blank or deep-drawing associated with heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of method and apparatus of the compound timeliness stretcher strain of metal sheet Vibration Creep, vibration is introduced while metal metal plate part creep is heat-treated and stretches, mainly includes lever, offset table, temperature control box dedicated, upper fixture, lower fixture, bracket, pass vibration plate, vibration excitor and vibration controller；It is described temperature control box dedicated to be placed on the bracket for being equipped with universal wheel, the upper fixture for fixing test specimen and lower fixture are equipped in temperature control box dedicated, upper fixture is connect by upper screw rod with link, and link is flexibly connected by bolt with lever, and lower fixture is spirally connected by bolt with vibration plate is passed；The lever upper end is equipped with the offset table of a measurement plate amount of tension；The vibration excitor both ends are connect with biography vibration plate and vibration controller respectively, it realizes to export the electric impulse signal that vibration controller issues in the form of excited frequency and gives biography vibration plate, it passes vibration plate to be set on bracket, realize on the metal sheet that the excited frequency that vibration excitor exports is transmitted in temperature control box dedicated.The present invention stretches metal sheet in such a way that vibration is combined with creep ageing, can not only increase substantially the extensibility and comprehensive mechanical property of plate, can also shorten the creep stretching time of plate, reduce experimental cost.
Description
Technical field
The present invention relates to a kind of method and apparatus of the compound timeliness stretcher strain of metal sheet Vibration Creep, belong to heat treatment
Field, in particular to a kind of compound timeliness stretcher strain side of Vibration Creep for improving metal sheet comprehensive mechanical property and dependent variable
Method and device.
Background technique
Creep ageing stretching refers to the creep stretcher strain that generation is changed over time under constant temperature constant force.Metal sheet is compacted
Stress relaxation can be occurred by becoming in ag(e)ing process, so that a part of flexible deformation be made to convert to plastic deformation, be retained in metal sheet
The permanent plastic deformation to get off is the final deformation quantity of plate, and this method can be used to improve the mechanical property of plate, deformation
The problems such as degree and internal stress are distributed.But stretch not only cannot be largely in releasable material for individual creep ageing
Residual stress, but also the longer high-temperature heat treatment time can be spent, cause unnecessary funds to waste.In modern industry,
It is typically employed in the single step sequence maneuver that vibration is introduced before or after plate creep ageing stretches（I.e.：First creep ageing is drawn
Vibration or first creep ageing stretching after vibration after stretching）, make its bear cyclic load, with promote material internal dislocation generation and
Change, so as to cause small plastic deformation, realizes a small amount of release of residual stress in plate, improve the ruler of plate after forming
Very little stability.But passes through practical operation and find：There are still longer creep ageing time and changes for single step sequence maneuver technique
The problems such as internal stress is unevenly distributed after shape, residual stress elimination is not thorough, unsuitable strong mechanical performance and high deformation accuracy
Plate research and development and preparation.
In summary, if it is possible to propose a kind of new technique or compound aging process, based on the above issues to realize gold
The simultaneously operating method of stress equalizing and vibration and the compound stretching of creep ageing during category plate heat aging, so that metal plate
The creep ageing time of part is shorter, drawing effect is more preferable, comprehensive mechanical property more preferably, it has also become industrially there is an urgent need to skill
Art.
Summary of the invention
The present invention in order to solve the problems, such as long-time high temperature heat aging in creep ageing drawing process, also for solve single step
The problems such as stress distribution is uneven in sequence maneuver, stress release is not thorough, the present invention provides a kind of vibration of metal sheet is compacted
Become the method and apparatus of compound timeliness stretcher strain, the stretcher strain of vibration auxiliary plate is both introduced while creep ageing.
A kind of method of the compound timeliness stretcher strain of metal sheet Vibration Creep, which is characterized in that include the following steps：
Step 1：The gold that standard prepares long 90 mm, 2 mm of wide 22 mm and thickness is stretched according to GB/T 2039-2012 metal creep
Belong to plate, the gauge length of metal sheet is 15 mm, and width is 6 mm, and gauge length sectional area is 12 mm；
Step 2：First by metal sheet by upper fixture and lower fixture be fixed on it is temperature control box dedicated in, then by vibration excitor respectively with
Vibration plate is passed to connect with vibration controller；
Step 3：While plate creep ageing stretches, metal sheet is implemented to vibrate by passing vibration plate by vibration excitor, also
It is that vibration is introduced during creep stretches.
A kind of method of the compound timeliness stretcher strain of metal sheet Vibration Creep according to right 1, which is characterized in that
In the step 2, metal sheet is first passed through into the vertical clamping of fastening bolt in upper fixture and lower fixture；Experiment institute is added again
The counterweight for needing weight makes the metal sheet after fixing only by the pulling force of vertical direction；Secondly the length for adjusting upper screw rod, makes lever
It balances in the horizontal direction；Offset table is finally adjusted, pointer is made to be zeroed.
A kind of method of the compound timeliness stretcher strain of metal sheet Vibration Creep according to right 1, which is characterized in that
It the use of the stress intensity that counterweight weight loads is 100~350 MPa, use is dedicated in creep drawing process in the step 3
Temperature control box（8）Creep heat aging is carried out, the creep temperature of heating is 30~550 DEG C, soaking time is 4~48 h；Introduce vibration
Assisting tension is carried out, in the metal sheet of creep heat aging（10）In drawing process, need vibration duration be 5~30 min,
The vibration intermittent time be 10~60 min, global vibration number at least 6 times.
A kind of method of the compound timeliness stretcher strain of metal sheet Vibration Creep according to right 1, which is characterized in that
Creep ageing measures the intrinsic frequency f of metal sheet before stretching, adjust vibration control by the excited frequency of 0.6~0.8 times of f
Instrument makes the output acceleration of vibration excitor reach 1~10 m/s2In range, it is directly realized by the ancillary vibration to metal sheet.
A kind of device of the compound timeliness stretcher strain of metal sheet Vibration Creep, which is characterized in that mainly include lever, position
It moves table, temperature control box dedicated, upper fixture, lower fixture, bracket, pass vibration plate, vibration excitor and vibration controller；It is described temperature control box dedicated to put
It sets and is being equipped with.On the bracket of universal wheel, the temperature control box dedicated interior upper fixture for being equipped with fixed test specimen and lower fixture, upper fixture pass through
Upper screw rod is connect with link, and link is flexibly connected by bolt with lever, and lower fixture is spirally connected by bolt with vibration plate is passed；The thick stick
Bar upper end is equipped with the offset table of a measurement plate amount of tension；The vibration excitor both ends connect with biography vibration plate and vibration controller respectively
It connects, realizes and export the electric impulse signal that vibration controller issues to vibration plate is passed in the form of excited frequency, pass vibration plate and be set to branch
On frame, realize on the metal sheet that the excited frequency that vibration excitor exports is transmitted in temperature control box dedicated.
A kind of device of the compound timeliness stretcher strain of metal sheet Vibration Creep, is characterized in that, institute according to right 5
It states lever and is flexibly connected with support base by pin shaft, lever left end is hung with a scale pan, and lever right end is equipped with a clump weight；It is described
Offset table is located on the coaxial line direction of upper fixture and is movably arranged on support base, is welded with a plate washer on the left of support base, prevents
Clump weight transition pulls downward on lever damage device, and support base is mounted on frame by bolt assembly, and frame is spirally connected with bracket.
A kind of device of the compound timeliness stretcher strain of metal sheet Vibration Creep, is characterized in that, institute according to right 5
State upper fixture needs to keep being aligned on vertical direction with lower fixture after mounting.
The method of the present invention has an advantage that the synchronization embodiment combined using vibration with creep ageing is to metal sheet
It is stretched, can not only increase substantially the extensibility and comprehensive mechanical property of metal sheet, metal sheet can also be shortened
Creep ageing stretching time and homogenizing plate in stress distribution；Apparatus of the present invention have an advantage that, the device have it is small in size,
It is light-weight, the features such as manufacturing cost is low, convenient in carrying, vibration not only may be implemented and the compound stretching of creep ageing technique becomes
Shape can also be realized the stretcher strain of metal sheet by single step sequence maneuver, be provided conveniently for the comparative experiments of scientific research.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention.
Fig. 2 is the structural schematic diagram that Fig. 1 removes temperature control box dedicated equal parts.
Fig. 3 is the experiment process figure of the method for the present invention.
Fig. 4 is that the Vibration Creep of the method for the present invention stretches schematic diagram.
Fig. 5 is the lever principle schematic diagram of the method for the present invention.
Fig. 6 is the extensibility definition and instrumentation plan of metal sheet of the present invention.
Wherein：1 scale pan；2 levers；3 plate washers；4 offset tables；5 clump weights；6 links；7 support bases；8 is dedicated
Temperature control box；9 upper fixtures；10 metal sheets；11 lower fixtures；12 brackets；13 vibration excitors；14 universal wheels；Screw rod on 15；
16 pass vibration plate；17 vibration controllers.
Specific embodiment
Embodiment 1
Referring to Fig. 1 ~ Fig. 5, early-stage preparations：By taking 7075-T6 state aluminium alloy plate as an example, the creep ageing for carrying out five groups of different temperatures is drawn
Stretch experiment test；It is identical that five groups of specifications of standard preparation are stretched according to GB/T 2039-2012 metal material single shaft creep first
Sample, and make mark in gauge length section, facilitate the deflection of measurement metal sheet 10 after the test；Then according to needed for experiment
12 mm of 150 MPa of stress intensity and sample marking distance sectional area of test2, calculate upper screw rod 15 pulling force be 1800 N, into
And by lever principle formula F1×S1=F2×S2, conversing the counterweight weight at A is 119 N.
Clamping sample simultaneously loads leveling：First metal sheet 10 is fixed in upper fixture 9 and lower fixture 11 with fastening bolt；
The counterweight that weight is 119 N is added on scale pan 1 again；The length for adjusting screw rod 15 again makes 2 level of approximation of lever；Finally
The dial plate for adjusting offset table 4, makes pointer be zeroed.
Implement experiment：In creep ageing drawing process, realized in furnace chamber using temperature control box dedicated 8 when temperature controller
The monitoring of temperature heating and aging time, the creep temperature of heating is respectively 130 DEG C, 150 DEG C, 170 DEG C, 190 DEG C and 210
DEG C, heat preservation aging time is 8 h.
Unload sample：Temperature controller when closing stops creep ageing and stretches, temperature control box dedicated 8 fire door opened, to sample
After cooling, the data of five groups of metal sheets 10 are unloaded and measure respectively, extensibility is respectively 9.30 %, 10.47 %, 10.92
%, 11.49 % and 10.65 %.
Embodiment 2
Referring to Fig. 1 ~ Fig. 5, by taking 7075-T6 state aluminium alloy plate as an example, the Vibration Creep compound tense of three groups of difference excited frequencies is carried out
Imitate stretching experiment test；It is identical as the stress intensity of test needed for embodiment 1, it is 150 MPa, counterweight weight is at corresponding A
119 N；In creep ageing drawing process, using temperature control box dedicated 8 when temperature controller realize furnace chamber in temperature heating and
The monitoring of aging time, 190 DEG C of the creep temperature of heating, heat preservation aging time are 8h；Creep ageing measures metal before stretching
266.7 Hz of intrinsic frequency f average out to of plate 10, adjusting vibration controller 17 makes excited frequency 0.6f, 0.7f and 0.8f,
I.e.：160.02 Hz, 187.69 Hz and 213.36 Hz, 4.50 m/s of acceleration average out to of output2, it is auxiliary to introduce vibration progress
Stretching is helped, it is 15 min that time of vibration is needed in 10 drawing process of metal sheet of creep heat aging, vibrates the intermittent time 45
Min, global vibration number are 8 times；Temperature controller when closing stops creep ageing and stretches, opens temperature control box dedicated 8 fire door, to
After sample is cooling, unload and measure respectively the data of five groups of metal sheets 10, extensibility be respectively 11.87 %, 12.33 % and
12.68 %；Remaining step is same as Example 1.
Embodiment 3
Referring to Fig. 1 ~ Fig. 5, by taking 7075-T6 state aluminium alloy plate as an example, the Vibration Creep compound tense of five groups of difference exciting time is carried out
Imitate stretching experiment test；It adopts such as creep ageing technique same as Example 2, measures metal sheet before creep ageing stretching
10 268.4 Hz of intrinsic frequency f average out to, adjusting vibration controller 17 makes excited frequency 0.6f, i.e.,：161.04 Hz, defeated
4.50 m/s of acceleration average out to out2, introduce vibration and carry out assisting tension, stretched in the metal sheet 10 of creep heat aging
It is 15 min that time of vibration is needed in journey, and the intermittent time is respectively 30 min, 35 min, 40 min, 45 min and 50 min, total vibration
Dynamic number is respectively 10 times, 9 times, 8 times, 8 times and 7 times；Temperature controller when closing stops creep ageing and stretches, opens dedicated temperature
The fire door for controlling case 8 unloads and measures respectively the data of five groups of metal sheets 10, extensibility difference 11.54 after sample is cooling
%, 12.26 %, 12.14 %, 11.92 % and 11.3 %；Remaining step is same as Example 2.
Referring to Fig. 6, the definition of extensibility of the present invention and measurement=[(L-L0)/L0]×100% =[ΔL/ L0]×
100%。
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (7)
1. a kind of method of the compound timeliness stretcher strain of metal sheet Vibration Creep, which is characterized in that include the following steps：
Step 1：Standard, which is stretched, according to GB/T 2039-2012 metal creep prepares experiment metal sheet（10）；
Step 2：First by metal sheet（10）Pass through upper fixture（9）With lower fixture（11）It is fixed on temperature control box dedicated（8）It is interior, then
By vibration excitor（13）Respectively with pass vibration plate（16）And vibration controller（17）Connection；
Step 3：While plate creep ageing stretches, by vibration excitor（13）By passing vibration plate（16）To metal sheet（10）
Implement vibration, that is, introduces vibration during creep stretches.
2. a kind of method of the compound timeliness stretcher strain of metal sheet Vibration Creep according to right 1, which is characterized in that institute
It states in step 2, first by metal sheet（10）By the vertical clamping of fastening bolt in upper fixture（9）With lower fixture（11）On；Add again
The counterweight for setting weight needed for testing makes the metal sheet after fixing（10）Only by the pulling force of vertical direction；Secondly upper screw rod is adjusted
（15）Length, make lever（2）It balances in the horizontal direction；Finally adjust offset table（4）, pointer is made to be zeroed.
3. a kind of method of the compound timeliness stretcher strain of metal sheet Vibration Creep according to right 1, which is characterized in that institute
It states in step 3, in creep drawing process, the use of the stress intensity that counterweight weight loads is 100~350 MPa, uses dedicated temperature
Control case（8）Creep heat aging is carried out, the creep temperature of heating is 30~550 DEG C, soaking time is 4~48 h；Introducing vibrate into
Row assisting tension, in the metal sheet of creep heat aging（10）In drawing process, vibration duration is needed to be 5~30 min, shake
The dynamic intermittent time is 10~60 min, global vibration number at least 6 times.
4. a kind of method of the compound timeliness stretcher strain of metal sheet Vibration Creep according to right 1, which is characterized in that compacted
Become before timeliness stretches and measures metal sheet（10）Intrinsic frequency f, adjust vibration control by the excited frequency of 0.6~0.8 times of f
Instrument（17）, make vibration excitor（13）Output acceleration reach 1~10 m/s2In range, it is directly realized by metal sheet（10）'s
Ancillary vibration.
5. a kind of device of the compound timeliness stretcher strain of metal sheet Vibration Creep, which is characterized in that mainly include lever（2）,
Offset table（4）, it is temperature control box dedicated（8）, upper fixture（9）, lower fixture（11）, bracket（12）, pass vibration plate（16）, vibration excitor（13）With
Vibration controller（17）；It is described temperature control box dedicated（8）It is placed on and universal wheel is installed（14）Bracket（12）On, it is temperature control box dedicated
（8）The interior upper fixture for being equipped with fixed test specimen（9）With lower fixture（11）, upper fixture（9）Pass through upper screw rod（15）With link（6）Even
It connects, link（6）Pass through bolt and lever（2）It is flexibly connected, lower fixture（11）By bolt and pass vibration plate（16）It is spirally connected；The thick stick
Bar（2）Upper end is equipped with the offset table of a measurement plate amount of tension（4）；The vibration excitor（13）Both ends respectively with pass vibration plate（16）
And vibration controller（17）Connection is realized vibration controller（17）The electric impulse signal of sending is exported in the form of excited frequency
Give biography vibration plate（16）, pass vibration plate（16）Set on bracket（12）On, it realizes vibration excitor（13）The excited frequency of output is transmitted to specially
Use temperature control box（8）Interior metal sheet（10）On.
6. a kind of device of the compound timeliness stretcher strain of metal sheet Vibration Creep, is characterized in that according to right 5, described
Lever（2）With support base（7）It is flexibly connected by pin shaft, lever（2）Left end is hung with a scale pan（1）, lever（2）Right end is equipped with
One clump weight（5）；The offset table（4）Positioned at upper fixture（9）Coaxial line direction on and be movably arranged on support base（7）On,
Support base（7）Left side is welded with a plate washer（3）, prevent clump weight（5）Transition pulls downward on lever（2）Damage device, support base（7）
It is mounted on frame by bolt assembly, frame and bracket（12）It is spirally connected.
7. a kind of device of the compound timeliness stretcher strain of metal sheet Vibration Creep, is characterized in that, upper folder according to right 5
Tool（9）With lower fixture（11）, the upper fixture（9）With lower fixture（11）It needs to keep the alignment on vertical direction after mounting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810969802.1A CN108856437A (en) | 2018-08-24 | 2018-08-24 | A kind of method and apparatus of the compound timeliness stretcher strain of metal sheet Vibration Creep |
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| CN201810969802.1A CN108856437A (en) | 2018-08-24 | 2018-08-24 | A kind of method and apparatus of the compound timeliness stretcher strain of metal sheet Vibration Creep |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026478A (en) * | 2019-04-30 | 2019-07-19 | 重庆三峡学院 | The method and apparatus of the compound timeliness progressive molding of Vibration Creep based on air pressure-loading |
| CN110320117A (en) * | 2019-07-15 | 2019-10-11 | 泰州市金鹰精密铸造有限公司 | The test method of based single crystal blade croop property |
| CN110883171A (en) * | 2019-12-24 | 2020-03-17 | 陈尧 | Special die equipment for creep age forming of aluminum alloy |
| CN112453204A (en) * | 2020-11-05 | 2021-03-09 | 中南大学 | Method and device for integrally forming shape of alloy complex component |
-
2018
- 2018-08-24 CN CN201810969802.1A patent/CN108856437A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110026478A (en) * | 2019-04-30 | 2019-07-19 | 重庆三峡学院 | The method and apparatus of the compound timeliness progressive molding of Vibration Creep based on air pressure-loading |
| CN110026478B (en) * | 2019-04-30 | 2024-05-03 | 中国民用航空飞行学院 | Method and device for vibration creep composite aging incremental forming based on pneumatic loading |
| CN110320117A (en) * | 2019-07-15 | 2019-10-11 | 泰州市金鹰精密铸造有限公司 | The test method of based single crystal blade croop property |
| CN110883171A (en) * | 2019-12-24 | 2020-03-17 | 陈尧 | Special die equipment for creep age forming of aluminum alloy |
| CN112453204A (en) * | 2020-11-05 | 2021-03-09 | 中南大学 | Method and device for integrally forming shape of alloy complex component |
| CN112453204B (en) * | 2020-11-05 | 2022-06-10 | 中南大学 | Method and device for integrally forming shape of alloy complex component |
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