CN110153210A - A kind of erosion-resisting lightweight Composite alloy plate pressing method and its mold design - Google Patents
A kind of erosion-resisting lightweight Composite alloy plate pressing method and its mold design Download PDFInfo
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- CN110153210A CN110153210A CN201910597931.7A CN201910597931A CN110153210A CN 110153210 A CN110153210 A CN 110153210A CN 201910597931 A CN201910597931 A CN 201910597931A CN 110153210 A CN110153210 A CN 110153210A
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- upper mold
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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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
-
- 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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/06—Making sheets
-
- 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
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
-
- 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
- B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention relates to board mould technical field, specially a kind of erosion-resisting lightweight Composite alloy plate pressing method, including formed punch, upper mold core, sleeve, lower die, wherein upper mold core and sleeve form upper mold.The formed punch is arranged in above the upper mold being made of upper mold core and sleeve, and the formed punch and the upper mold are coaxially disposed；There are three blank holes for the upper mold processing；Narrating plane machining in lower die has edge；There are three flow channels for processing inside the lower die；It is that plate exports below three flow channels intersection part；By plate extruding a series of plastic deformation occurs for the present invention by circular bar, have refinement crystal grain, enhancing corrosion resistance, deformation efficiency it is high, can one module multiple usages, the advantages such as processing can be rolled.
Description
Technical field
The present invention relates to sheet alloy field of extrusion, specifically for the raising of the corrosion resistance of plate, and pass through
Channel pressings carry out refinement crystal grain, improve strength of alloy, deformation efficiency is high, can one module multiple usages, the advantages such as processing can be rolled.
Background technique
Since magnesium metal has lower corrosion potential, metallic impurity elements present in alloy can cause it serious
Corrosion, and the oxide layer of Mg alloy surface is loose porous, and thickness is smaller, does not have good protective effect magnesium alloy to matrix
Weak corrosion resistance greatly limits its application.Therefore the corrosion behavior and etching machine of research magnesium alloy under various conditions
Reason, the factor of its corrosion resistance of analyzing influence improve the corrosion resistance of magnesium alloy to magnesium alloy using suitable treatment process
Using and development have very big progradation.Corrosion resistant measure is coped with now and is mainly divided to two aspects, and one is from alloy table
Face is set out, and a kind of safeguard procedures are prepared, and completely cuts off alloy as far as possible in the external world.Another kind is to add other from alloy
Element increases itself corrosion resistance.
Summary of the invention
To be given below about brief overview of the invention, in order to provide the base about certain aspects of the invention
This understanding.It should be appreciated that this summary is not an exhaustive overview of the invention.It is not intended to determine of the invention
Crucial or pith, nor is it intended to limit the scope of the present invention.Its purpose only provides certain general in simplified form
It reads, taking this as a prelude to a more detailed description discussed later.
Further in order to which the corrosivity for solving the problems, such as magnesium alloy is poor, the present invention is right mainly from alloy surface
The good alloy of mechanical property (being defined as No. 1 alloy, similarly hereinafter) carry out surfacecti proteon, with another alloy (be defined as No. 2 alloys,
Similarly hereinafter) its surface, No. 2 alloys require corrosion resistance strong compared with No. 1 alloy.No. 2 alloys are carried out in extrusion process equal logical
Road squeezes, and enhances its tensile strength.The invention greatly improves corrosion resistance and tensile strength, can improve magnesium alloy corruption
The problem of corrosion difference.
It is further the technical solution adopted by the present invention is that: including 1, upper mold, 2, lower die, 3, formed punch, upper mold includes 4, on
Mold core and 5, sleeve.4, upper mold core and 5, sleeve constitute three cylinder blank holes, squeeze to form extruding with the plate of lower die
Channel.Blank is by three cylindrical body composition of alloy.From left to right, intermediate blank is No. 1 alloy to three blanks, and two sides are No. 2 conjunctions
Gold.Lower die is the combination for carrying out plate and most important part.The fluted upper surface of lower die is to carry out more with upper mold
It is good to combine.Inside lower die, the blank of two sides will cover intermediate alloy.The invention, on the one hand by two sides alloy to centre
Collect, on the other hand carries out crystal grain refinement by way of equal channels, it is strong that the alloy for keeping original intensity bad improves its tension
Degree, kills two birds with one stone.When No. 2 alloys cover No. 1 alloy.The present invention is smaller by mould outlet design, and the purpose is to logical
The external force for crossing mold covers No. 2 alloys preferably to No. 1 alloy.
A kind of alloy can also be carried out plate and squeezed by the invention, realize one module multiple usages.
It using A356 alloy is that No. 2 alloys are corrosion-resistant as case study that the present invention, which is No. 1 alloy with Mg-Ca-Zn-Sn alloy,
The mechanical property of performance and alloy, the invention mainly comprises 1, upper mold, 2, lower die, 3, formed punch, upper mold include 4, upper mold core and
5, sleeve, 6, heating device, 7 temperature thermocouples composition.Specific step is as follows:
Step a, mold is assembled, upper mold is made of mold core and sleeve, and upper mold is put among lower die groove, makes upper mold circle
Heart hole center is overlapped with lower die rectangular central.
It step b, is 20mm by diameter, length is that 1, No. 2 magnesium alloy blank of 75mm is put into upper mold core.
Step c, heating device 6 is connected in upper mold 1 and lower die 2, to upper mold 1 and lower die 2 and it is added after connecting with the mains
In magnesium alloy blank heated.
Step d, open connection temperature-controlling system thermocouple, reach experimental temperature after and heat preservation 1h is carried out to entire mold.
Step e, cracking pressure machine is squeezed, until the amount of moving down of formed punch accounts for the half of alloy size, closes press machine.
Step f, the sheet alloy squeezed out is taken out.
Further, the mould heating-up temperature range in step c is at 300 DEG C~400 DEG C
Further, circular bar plate is extruded into during shape, using water-based graphite as lubricant.
Further, the circular bar is light alloy metal material.
The present invention has the advantages that compared with the existing technology
One, the corrosion resistance of No. 1 alloy can be increased, the mechanical property of No. 2 alloys can be increased.
Two, No. 2 alloys can carry out equal channel pressings in mold, and the mechanical property of alloy is improved by crystal grain refinement, bright
The effect of the aobvious refined crystalline strengthening for improving alloy.
Three, since No. 2 alloys cover, No. 1 alloy is greatly reduced due to crackle caused by squeezing.
Four, the plate that the present invention with one module multiple usages, can both carry out a variety of alloys squeezes, and can also carry out a kind of plate of alloy
It squeezes.
Five, the present invention used in Mold Making it is simple, be easy to reequip, processing have low cost.Metal material is wherein
Carry out that there is continuity when plastic deformation, fine grain effect is good, improves the processing efficiency of magnesium alloy.
Detailed description of the invention
Fig. 1 is schematic perspective view of the invention；
Fig. 2 is half section structure diagram of the present invention；
Fig. 3 is top view of the invention；
Fig. 4 is side view of the invention；
Fig. 5 is the schematic perspective view of upper core of the present invention；
Fig. 6 is the top view of upper core of the present invention；
Fig. 7 is the schematic perspective view of sleeve of the present invention；
Fig. 8 is the top view of sleeve of the present invention；
Fig. 9 is the schematic perspective view of lower die of the present invention；
Figure 10 is the front view of lower die of the present invention；
Figure 11 is the side view of lower die of the present invention；
Figure 12 is the top view of lower die of the present invention；
Figure 13 is the front view of formed punch of the present invention；
Figure 14 is the as-cast microstructure schematic diagram of No. 1 alloy of the invention.
Figure 15 is the microstructure schematic diagram that the present invention carries out plate extruding under the conditions of 400 DEG C with No. 1 alloy.
Figure 16 is the as-cast microstructure schematic diagram of No. 2 alloys of the invention.
Figure 17 is that the present invention carries out the microstructure schematic diagram for waiting channels plate to squeeze with No. 2 alloys under the conditions of 400 DEG C.
2, lower die in figure, 3, formed punch, upper mold include 4, upper mold core and 5, sleeve, 2-1, flow channel a, 2-2, flow channel
B, 2-3, flow channel c, 4-1, blank hole a, 4-2, blank hole b, 4-3. blank hole c.
Specific embodiment
Below with reference to attached drawing, the present invention is described in detail.
Embodiment one:
Show in conjunction with Fig. 1-Fig. 4, a kind of circular bar disclosed in the present embodiment improved by plate extruding corrosion resistance with
And mechanical property, including 1, upper mold, 2, lower die, 3, formed punch；Three cylinder blank holes of the upper mold are arranged in the formed punch 3
Top, and the formed punch 3 is arranged concentrically with the upper mold；
The upper mold includes including 4, upper mold core and 5, sleeve, and upper mold core and sleeve form three circular blank holes.
The lower die includes 3 plate flow channels, and a sheet path carries out forward extrusion by circular blank and forms plate,
Two sides b, c plate flow channel is forms plate by Equal Channel Angular Pressing by circular blank, lower die top surrounding there are edge,
The purpose is to which upper mold to be fixed, and the circular blank hole of upper mold and the material of rectangular channel hole of lower die are arranged concentrically；
Further, the mold materials are H13 steel.
Further, the plate flow channel a flow channel for narrating lower die is 58mm, and b, c flow channel vertical direction are
58mm, horizontal direction 45mm, waiting channels turning is 90 °.
A kind of working method waiting channels and the erosion-resisting plate extrusion die in surface, this method comprises the following steps:
Step a, mold is assembled, upper mold is made of mold core and sleeve, and upper mold is put among lower die groove, makes upper mold circle
Heart hole center is overlapped with lower die rectangular central.
It step b, is 20mm by diameter, length is that 1, No. 2 magnesium alloy blank of 75mm is put into upper mold core.
Step c, heating device 6 is connected in upper mold 1 and lower die 2, to upper mold 1 and lower die 2 and it is added after connecting with the mains
In magnesium alloy blank heated.
Step d, open connection temperature-controlling system thermocouple, reach experimental temperature after and heat preservation 1h is carried out to entire mold.
Step e, cracking pressure machine is squeezed, until the amount of moving down of formed punch accounts for the half of alloy size, closes press machine.
Step f, the sheet alloy squeezed out is taken out.
Further, the mould heating-up temperature range in step c is at 300 DEG C~400 DEG C
Embodiment two:
Show in conjunction with Fig. 1-Figure 17, two kinds of alloys will be used to carry out plate extruding simultaneously in the present embodiment.
Further with Mg-Ca-Zn-Sn alloy for No. 1 alloy, with A356 alloy for No. 2 alloys, there is anti-corruption by squeezing out
Corrosion can good alloy.
By dimensions2 No. 2 alloy circular bars be put into the hole blank bc and 1 No. 1 alloy circle
Bar is put into the hole blank a and is deformed.There to be the mold of blank to take out from heating device, is put into hydraulic press, is squeezed
Pressure.With moving down for formed punch, circular blank initially enters Vertical Channel, and circular blank becomes plate shape at this time.
The board dimension in the further channel a is 6 × 20mm, and No. 1 alloy is pushed with formed punch, and plate is squeezed out from outlet.
The board dimension in the further channel b, c is that 8 × 20mm can enter one section of horizontal transition area by 90 ° of turnings
Then run into 90 ° of arc corners, strip velocity is downward at this time, and board dimension becomes 2 × 20mm.
The plate in the further channel b, c can cover the plate in the channel a, forming face covering.
The rectangular plate of 10 × 20mm is finally squeezed out from outlet.
It is No. 1 alloy by Mg-Ca-Zn-Sn alloy under 400 DEG C of deformation temperatures, is that No. 2 alloys are real with A356 alloy
It applies one mold of example and carries out the crowded deformation of above-mentioned plate, after deformation, the corrosion resistance of No. 2 alloys is better than No. 1 alloy, so enhancing it
Corrosion resistance.
Embodiment three:
Show further explanation the present embodiment in conjunction with Fig. 1-Figure 15.No. 1 alloy cylinder blank is subjected to plate in the present embodiment
Material squeezes.
By dimensionsA No. 1 alloy circular bar be put into the hole blank a and deformed.To have
The mold of blank takes out from heating device, is put into hydraulic press, is squeezed.With moving down for formed punch, circular blank is first
Into Vertical Channel, circular blank becomes plate shape at this time.
The board dimension in the further channel a is 6 × 20mm, and No. 1 alloy is pushed with formed punch, and plate is squeezed out from outlet.
The rectangular plate of 6 × 20mm is finally squeezed out from outlet.
Under 400 DEG C of deformation temperatures, it will be carried out for No. 1 alloy with one mold of embodiment with Mg-Ca-Zn-Sn alloy above-mentioned
Plate squeezes deformation, after deformation, studies its metallographic structure photo, such as Figure 15.
Example IV:
Show further explanation the present embodiment in conjunction with Fig. 1-Figure 13 and Figure 16, No. 2 alloy cylinder blanks are subjected to equal channels
Plate squeezes.
By dimensionsA No. 2 alloy circular bars be put into the hole blank b and deformed.To have
The mold of blank takes out from heating device, is put into hydraulic press, is squeezed.With moving down for formed punch, circular blank is first
Into Vertical Channel, circular blank becomes plate shape at this time.
The board dimension in the further channel b is 8 × 20mm, and No. 2 alloys are pushed with formed punch, and plate is from can pass through one
90 ° of turnings enter one section of horizontal transition area using next 90 ° of arc corners, and strip velocity is downward at this time, and board dimension becomes
For 2 × 20mm.
The rectangular plate of 2 × 20mm is finally squeezed out from outlet.
Under 400 DEG C of deformation temperatures, above-mentioned plate will be carried out with one mold of embodiment for No. 2 alloys with A356 alloy and squeeze change
Shape after deformation, studies its metallographic structure photo, such as Figure 17.
The difference of present embodiment one, two, three, four is only that, embodiment second is that the alloy generated and No. 1 alloy it is resistance to
Corrosive comparison, the difference of embodiment three, four be the channel plates such as 1, No. 2 alloy of verifying squeeze deformation after microscopic structure with
Its as-cast microstructure Figure 14 and Figure 16 are compared.
By the test result of above embodiments it is found that the present invention will be closed at 400 DEG C to Mg-Ca-Zn-Sn alloy for No. 1
Gold is that No. 2 alloys carry out preparing one kind gently in a manner of common plate extruding-waits plate extruding in channels to combine by A356 alloy
Matter, highly corrosion resistant, high-strength alloy.
Above embodiments are exemplary description of this patent, do not limit its protection scope, those skilled in the art
Member can also be changed its part, as long as it does not exceed the essence of this patent, within the protection scope of the present patent.
Claims (11)
1. erosion-resisting lightweight Composite alloy plate pressing method and its mold design, experimental provision of the present invention specifically includes 1, on
Mould, 2, lower die, 3, formed punch, upper mold include 4, upper mold core and 5, sleeve, 6, heating device, and 7 temperature thermocouples form, and feature exists
In: heating device 6 is connected in sleeve 5 and lower die 2, to 1 upper mold, 2 lower dies, 3 formed punches, 4 upper mold cores and addition after connecting with the mains
Magnesium alloy blank therein is heated.
2. erosion-resisting lightweight Composite alloy plate pressing method according to claim 1 and its mold design, feature
Cooperated with upper mold core and upper mold sleeve, fit clearance is 0.1 ~ 0.3mm；In order to facilitate magnesium alloy demoulding, pay special attention to
Be that the cooperation of upper mold core and sleeve directly affects lower die accuracy, it is noted that lower die upper surface reserves groove, can be with
Keep upper mold preferably nested, be aligned with lower die center, improves experiment accuracy.
3. according to claim 1, erosion-resisting lightweight Composite alloy plate pressing method and its mold design described in 2, special
Sign is: there are three blank holes, formed punches 3 to push, can squeeze the uniform alloy of melting from die blank hole for mold, squeezes
The speed of pressure is 1mm/s to 30mm/s.
4. according to claim 1, erosion-resisting lightweight Composite alloy plate pressing method and its mold design described in 2,3 close
Between 300 DEG C~400 DEG C, temperature is heated the extruding temperature of gold by heating device 6, connects the thermoelectricity of temperature-controlling system
It is even to carry out thermometric and control temperature.
5. erosion-resisting lightweight Composite alloy plate pressing method according to claim 1 and its mold design, specific 1
Mass percent Ca 0.5wt.%, Sn 4wt.%, the Zn 2wt.% of each element in number magnesium alloy (see specification), remaining is pure
Magnesium, mass percent Si 6.5wt.%-7.5wt.%, the Zn 0.5wt.%, Mg of each element in No. 2 aluminium alloys (see specification)
0.3wt.%-0.4wt.%, Mn 0.05wt.%, Zn 0.05wt.%, Sn 0.01wt.%, remaining is fine aluminium.
6. erosion-resisting lightweight Composite alloy plate pressing method according to claim 1 and its mold design, feature
Be: the diameter of magnesium alloy blank is 20mm, length 75mm.
7. erosion-resisting lightweight Composite alloy plate pressing method according to claim 1 and its mold design, feature
Be: the board dimension in the channel a is 6 × 20mm, and the rectangular plate of 6 × 20mm is finally squeezed out from outlet；The board dimension in the channel b
For 8 × 20mm, the rectangular plate of 2 × 20mm is finally squeezed out from outlet.
8. erosion-resisting lightweight Composite alloy plate pressing method according to claim 1 and its mold design, feature
It is: when carrying out pier pressure to magnesium alloy, 2/3 for moving down spacing and accounting for billet size of mold and punching head 3.
9. erosion-resisting lightweight Composite alloy plate pressing method according to claim 1 and its mold design, feature
Be: the channel b, c enters 90 ° of circular arc-shaped corners by Vertical Channel 38mm, is then again introduced into 90 ° by the horizontal channel of 45mm
Circular arc-shaped corner.
10. erosion-resisting lightweight Composite alloy plate pressing method according to claim 1 and its mold design, mold go out
It is the rectangular outlet of 10 × 20mm at mouthful.
11. erosion-resisting lightweight Composite alloy plate pressing method according to claim 1 and its mold design, feature
It is that steps are as follows for the preparation method:
Step a, mold is assembled, upper mold is made of mold core and sleeve, and upper mold is put among lower die groove, makes upper mold circle center hole
Center is overlapped with lower die rectangular central；
It step b, is 20mm by diameter, length is that 1, No. 2 magnesium alloy blank of 75mm is put into upper mold core；
Step c, heating device 6 is connected in upper mold 1 and lower die 2, to upper mold 1 and lower die 2 and is added thereto after connecting with the mains
Magnesium alloy blank is heated；
Step d, open connection temperature-controlling system thermocouple, reach experimental temperature after and heat preservation 1h is carried out to entire mold；
Step e, cracking pressure machine is squeezed, until the amount of moving down of formed punch accounts for the half of alloy size, closes press machine；
Step f, the sheet alloy squeezed out is taken out；
Further, the mould heating-up temperature range in step c is at 300 DEG C~400 DEG C.
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Cited By (4)
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| CN111702026A (en) * | 2020-06-28 | 2020-09-25 | 郑州机械研究所有限公司 | Multi-cavity extrusion preparation device and preparation method of side compound metal composite material |
| WO2021169513A1 (en) * | 2020-02-26 | 2021-09-02 | 凯维思轻量化智能制造研究院(菏泽)有限公司 | Extrusion die, apparatus and method for implementing bidirectional extrusion molding process |
| CN114130846A (en) * | 2021-11-19 | 2022-03-04 | 江苏江顺精密科技集团股份有限公司 | Four-bar one-die hot extrusion die and preparation method thereof |
| CN114749505A (en) * | 2022-03-18 | 2022-07-15 | 南京理工大学 | Preparation system and method of laminated heterogeneous alloy plate |
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| CN114130846A (en) * | 2021-11-19 | 2022-03-04 | 江苏江顺精密科技集团股份有限公司 | Four-bar one-die hot extrusion die and preparation method thereof |
| CN114749505A (en) * | 2022-03-18 | 2022-07-15 | 南京理工大学 | Preparation system and method of laminated heterogeneous alloy plate |
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