CN207308606U - The flat prod cast of extruding metal - Google Patents
The flat prod cast of extruding metal Download PDFInfo
- Publication number
- CN207308606U CN207308606U CN201721219797.XU CN201721219797U CN207308606U CN 207308606 U CN207308606 U CN 207308606U CN 201721219797 U CN201721219797 U CN 201721219797U CN 207308606 U CN207308606 U CN 207308606U
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- Prior art keywords
- die hole
- die
- prod cast
- flat
- extruding metal
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Abstract
The utility model provides a kind of flat prod cast of extruding metal, and the flat prod cast of extruding metal includes：The die hole and die orifice being connected up and down successively；The die hole has upper port and lower port, and the upper port of the die hole is the entrance of die hole, and the lower port of the die hole is the outlet of die hole, and the lower port of the die hole connects the entrance of the die orifice；A diameter of R of the upper port of the die hole, the sectional area of the lower port of the die hole is S2, the diameter of the upper port of the die hole is more than the diameter of the lower port of the die hole, and the height of the die hole is H, and the taper of the die hole is a；The sectional area of the inlet of the die orifice is S1；The lower port of the die hole and the entrance of the die orifice are in the same plane；The radius R of the upper port of the die hole is equal to the internal diameter of extrusion cylinder, S2More than S1, S2With S1Between for the ring-shaped platform region at die orifice.The utility model can reduce power needed for extrusion process process.
Description
Technical field
It the utility model is related to profile extrusion manufacture field, and in particular to a kind of mould for extruding metal, i.e., a kind of metal
Extrude flat prod cast.
Background technology
Metal carries out in the state of three-dimensional compressive stress in extrusion process, can fully play the plasticity of metal
Can, and the degree of grain refinement of metal can be improved well, deformation is more uniform so that fiber is more stepped up by loosely becoming
It is close, therefore the performance of metal is improved well.But the power needed for extrusion process is also bigger, in order to reduce extruding force, it is necessary to
The structure of mould is adjusted.
Current extrusion die can be totally divided into flat-die, prod cast, wherein flat prod cast three major types, the extruding needed for flat-die by structure
Power is maximum, and the extruding force needed for prod cast peace prod cast is more a little bit smaller；But during produce reality, even if being bored using prod cast peace
Mould, as shown in Figure 1, the extruding force needed for it is still very big, beyond the limit of power of equipment.
In conclusion problems with exists in the prior art：Extruding force needed for existing prod cast and flat prod cast compared with
Greatly, beyond the limit of power of equipment, it is unfavorable for the miniaturization of extrusion equipment.
Utility model content
The utility model provides a kind of flat prod cast of extruding metal, under conditions of the extrusion ratio of crimp is met, to carry
For suitable extruding force, reduce extruding force needed for extrusion process process.
For this reason, the utility model proposes a kind of flat prod cast of extruding metal, the flat prod cast of extruding metal includes：
The die hole and die orifice being connected up and down successively；The axis of the die hole and the axis of die orifice overlap；
The die hole is taper type cavity, and the die orifice is column type cavity or ladder column type cavity；
The die hole has upper port and a lower port, and the upper port of the die hole is the entrance of die hole, under the die hole
Port is the outlet of die hole, and the lower port of the die hole connects the entrance of the die orifice；
A diameter of R of the upper port of the die hole, the sectional area of the lower port of the die hole is S2, the upper end of the die hole
The diameter of mouth is more than the diameter of the lower port of the die hole, and the height of the die hole is H, and the taper of the die hole is a；
The sectional area of the inlet of the die orifice is S1；The entrance of the lower port of the die hole and the die orifice is located at same
In plane；
The diameter R of the upper port of the die hole is equal to the internal diameter of extrusion cylinder, S2More than S1, S2With S1Between at die orifice
Ring-shaped platform region.
Further, the value of the taper a of the die hole is 25 ° to 30 °.
Further, it is characterised in that the flat prod cast of extruding metal determines parameter according to equation below：
Wherein, the unit of a is degree, and C is proportionality coefficient, and the unit of H, R and r are millimeter, and r represents the outer of the entrance of die orifice
Radius of circle is connect, R represents the upper port diameter of die hole or the diameter of blank.
Further, the value of C is 3 to 5.
Further, a is further 30 °, and H further arrives 50mm for 30.
Further, the value of C is further 3.3 to 5.
Further, the extrusion ratio of the flat prod cast of the extruding metal is more than 12.
Further, R 80mm, S2For 784.27mm2, S1For 132.73mm2, r 6.5mm, a are 30 °, H 48mm.
The flat prod cast of extruding metal of the utility model is optimized in structure, can reduce dead band thickness, reduces and squeezes
Press power needed for technical process.The utility model is applicable not only to extruding pole section bar, for the section bar of other solid constructions
Still it is applicable in.Present invention may apply to copper, copper alloy, aluminium and aluminium alloy and other be adapted to extruding metal.
Brief description of the drawings
Fig. 1 is the fundamental diagram of existing flat prod cast；
Fig. 2 is the fundamental diagram of the flat prod cast of extruding metal of the utility model；
Fig. 3 is the overlooking the structure diagram of the flat prod cast of extruding metal of the utility model；
Fig. 4 is the A-A schematic cross-sectional views of Fig. 3；
Fig. 5 is the extruding force comparison diagram of the flat prod cast of extruding metal of existing flat prod cast and the utility model；
Fig. 6 is the extruding force of the flat prod cast of extruding metal of the utility model with the trend chart of taper a；
When Fig. 7 is maintained at 30 ° for taper a, the extruding force of the flat prod cast of extruding metal of the utility model with die hole height H
Trend chart；
Fig. 8 is blank dead band schematic diagram in the flat prod cast extrusion process of extruding metal of the utility model；
Fig. 9 is that the flat prod cast of extruding metal of the utility model extrudes dead band size e and the relation of C values.
Drawing reference numeral explanation：
1st, die hole；2nd, ring-shaped platform region；3rd, die orifice；
11st, upper port；13rd, lower port
31st, the entrance of die orifice；
Embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, existing control brief description of the drawings
The utility model.
As shown in Figure 2, Figure 3 and Figure 4, the utility model proposes a kind of new mould, i.e., new flat prod cast, that is,
The flat prod cast of extruding metal, the flat prod cast of extruding metal include：
The die hole 1 and die orifice 3 being connected up and down successively；The axis of the die hole 1 and the axis of die orifice 3 overlap；
The die hole 1 is taper type cavity, and the die orifice 3 is column type cavity or ladder column type cavity；
The die hole 1 has upper port 11 and lower port 13, and the upper port 11 of the die hole is the entrance 31 of die hole, described
The lower port 13 of die hole is the outlet of die hole, and the lower port 13 of the die hole connects the entrance 31 of the die orifice；
A diameter of R of the upper port 11 of the die hole, the sectional area of the lower port 13 of the die hole is S2, the die hole
The diameter of upper port is more than the diameter of the lower port of the die hole, and the height of the die hole is H, and the taper of the die hole is a；
The sectional area of the inlet of the die orifice is S1；The entrance of the lower port of the die hole and the die orifice is located at same
In plane；
The radius R of the upper port of the die hole is equal to the internal diameter of extrusion cylinder, S2More than S1, S2With S1Between at die orifice
Ring-shaped platform region 2.
The utility model and prod cast it is identical in that, blank is entered in mould by extrusion cylinder, and blank is also directly whole
Body enters die hole, and in flat prod cast, some withstands near die hole blank, it is unlike prod cast near die orifice
There are one section of straight angle region, i.e. ring-shaped platform region 2.
The most prominent function of the flat prod cast of the utility model can exactly reduce extruding force needed for extrusion process process.First
The B area why structure eliminates in Fig. 1 is that this part is dead because can greatly form extruding dead band in the region
Area can influence the mobility of metal, in addition, the resistance that the presence of B area enters blank die hole can increase, increase and extruded
The extruding force of Cheng Suoxu.Therefore this part is eliminated in the utility model, die hole is done greatly as prod cast, makes blank direct
Cavity is entered by die hole.Secondly why setting one section of straight angle region (ring-shaped platform region 2) in die orifice in the utility model is
From the aspect of following two；First, so doing the amount that can increase the receiving metal near die orifice, reduce die orifice mould nearby
To the resistance of metal, so as to reduce extruding force；Although also there is metal in this section of straight angle region certain obstruction, die orifice is proximate to
This straight angle regional metal flow velocity it is fast, mobility is fine, thus hinder effect and unobvious.Second, one section is set to put down
Angular zone is in order to be formed about a dead band in die wall, for accommodating the skin portion of blank；If the epidermis of blank
Extrusion mould-outlet then occurs into section bar causes defect, influences the quality of product.
In order to further select the parameters of mould and size, to obtain ideal extruding force, it is also necessary to upper
State the flat prod cast of extruding metal and carry out further refinement and preferably.
Consider from mould structure, influencing the factor of extruding force not only has the species of mould, also has some under each structure
Parameters of structural dimension is related, such as parameter a, H, S1, S2, R in Fig. 2.What wherein a was represented is the cone angle size of mould, what H was represented
It is the height of prod cast part, what S1 was represented is the sectional area size of extrusion profile.What R was represented is the diameter of blank.It is real in production
During border, general S1 and R are fixed, and other specification is adjustable, therefore to obtain optimised process, have to by a, H,
S2 is controlled in a rational scope.
Fig. 5 is in the case where R, S1 are identical with a, compares the small greatly with h's of flat prod cast and new flat prod cast extruding force
Change.
It can be seen that H is in the region, the utility model proposes new flat prod cast needed for extruding force than common flat cone
Extruding force needed for mould is small, and in addition it should be noted that point that two lines overlap represents H in value, two kinds of moulds are all drilled
Become prod cast, that is, in common flat prod cast B=0, situation during new flat prod cast S2=S1；Therefore curve also table in figure
Extruding force needed under bright new flat prod cast structure is again smaller than prod cast structure.It is less than as H why is not depicted in Fig. 5
Extruding force is because under this condition, going down two kinds of moulds just closer to flat-die when H continuation is small with the change of h during below 30mm
, extruding force is certain to increase.
In order to further explore the relation under new flat prod cast structure between extruding force and each parameter, DEFORM softwares are utilized
Following two groups of simulated experiments are done：
When H is maintained at 33.5mm, extruding force is as shown in Figure 6 with the variation tendency of a；It can be seen from the figure that work as cone angle a
Required extruding force is small when between 10 ° to 30 °, but is found in follow-up extruding dead band size analysis, when a is less than 25 °, base
The skin defects of material easily flow into section bar, so that the quality of extrusion profile is influenced, therefore a is maintained between 25 ° to 30 ° and more closes
It is suitable；In addition, dead band size analysis mentioned above is " point Tracking " (point tracking) lives utilized in DEFORM softwares
Order, a series of representative points are chosen in blank, observe these points in extrusion process can or can not extrusion mould-outlet so that
Judge dead band.In order to further explore the relation under the flat prod cast structure of the utility model between extruding force and each parameter, utilize
DEFORM softwares have done following two groups of simulated experiments：
When H is maintained at 33.5mm, the flat prod cast extruding force of the utility model is as shown in Figure 6 with the variation tendency of a；From figure
In as can be seen that required extruding force is small when between 10 ° to 30 ° as cone angle a, but sent out in follow-up extruding dead band size analysis
Existing, when a is less than 25 °, the skin defects of blank easily flow into section bar, so that the quality of extrusion profile is influenced, therefore a is maintained at
It is more suitable between 25 ° to 30 °；In addition, dead band size analysis mentioned above is the " point utilized in DEFORM softwares
Tracking " is ordered, and a series of representative points is chosen in blank, observing these points can or can not squeeze in extrusion process
Go out die orifice, so as to judge dead band.
When a is maintained at 30 °, the flat prod cast extruding force of the utility model is as shown in Figure 7 with the variation tendency of H；From figure
It can be seen that extruding force required during H very littles is larger；When H is smaller to 50mm or so extruding forces between 30, but H exceeds this model
When enclosing, extruding starts rapid increase again.
From experiment above it can be found that within the specific limits, compared to H, change of the extruding force size to a is more sensitive；
In addition for dead band thickness e as shown in figure 8, what dash area showed in figure is for a blank, it can shape in extrusion process
Into the part in dead band, according to thickness e so as to judge dead band size；The premise that specific verification method on dead band thickness e is exactly
To using in DEFORM softwares " point tracking " order, from after blank front end face L (as shown in Figure 8) region choosing
A series of representative points are taken, the point in this region is the big portion of blank because in the region before why not choosing L
Cavity will be filled and dead band is formed about in modular angle area by dividing, therefore without representativeness；In view of blank and mould size, afterwards
Simulated experiment in L take 15mm.It is with S2 under related and different R and S1, that is, extrusion ratio is different, the size of e
It is different, based on above-mentioned discovery, draws a proportionality coefficient C value：C=S2/S1, by studying related proportionality coefficient C values
Size, obtains under different extrusion ratios, the relation of e and C (proportionality coefficient C and the relation of dead band size), according to this relation,
A more suitable value range of the C under different extrusion ratios is found, the last size that a and H is adjusted according to obtained C values
So as to fulfill optimization, the relation such as formula (1-1) of C and each relevant parameter：
r：Represent the circumradius size of die orifice, it may also be said to be the circumradius size in extrusion profile section area；
R：The upper port diameter of die hole or the diameter of blank；
Tested from first three groups, a extruding forces at 25 ° to 30 ° or so are smaller, therefore in the design process first select a
Determine in the range of this, final need to adjust H and can be achieved with optimizing.
Table 1 is the table for the pole section bar progress dead band heights Experiment that diameter 13mm is extruded using the round bar of diameter 80mm
Lattice.In order to obtain in the case of different extrusion ratios C values a more suitable value range, as shown in figure 9, have studied respectively crowded
Pressure ratio is 12,25,38 dead band size e in the case of these three and the relation of C values, its result is as shown in Figure 8 and Figure 9；Can from figure
To find out, for new flat prod cast, extrusion ratio is bigger, its dead band thickness e is bigger, and dead band thickness e increases with the increase of C,
Under different extrusion ratios, its changing rule is still consistent；In addition when C is between 3 to 5, the change of dead band thickness B is very big, comprehensive
Close and consider, the value of C is more suitable between 3.3 to 5, and C values remove the limit when extrusion ratio is big；Capping when extrusion ratio is small；If squeeze
When pressure ratio is more than 38, the value of C should be slightly less than 3.3, but not be smaller than 3, and otherwise blank skin defects can enter section bar.This practicality
The value range of new extrusion ratio is, for example, the value of 12 to 38, C 3.3 to 5.
The utility model by the aluminum alloy round bar of diameter 80mm for example for extruding 13mm pole section bars.In view of extrusion
Section bar it is smaller, it is desirable to production is realized in the equipment of small tonnage, it is desirable to design a set of its extruding force can be made as small as possible
Extrusion die, so as to reduce cost, reduce energy consumption, reduce equipment and take up an area.But find through simulation, bored using existing prod cast peace
Extruding force needed for mould is closer to the maximum extrusion pressure that equipment can be provided.For this reason, employ the utility model structure
New flat prod cast, mini-plant can be made to squeeze out required bar under conditions of smaller extruding force.
, it is necessary to further select rational die parameters after the flat prod cast of selected the utility model, otherwise, different moulds
Parameter can also influence the size of extruding force.The factor for influencing extruding force is not only the structure and species of mould, also has each knot
Some parameters of structural dimension under structure.For example, parameter a, H, S1, S2, R. wherein a represent be mould cone angle size, H represent
It is the height of prod cast part, what S1 was represented is the sectional area size of extrusion profile.What S2 was represented is the big of straight angle section near die orifice
Small (including S1 parts), what R was represented is the diameter of blank.During produce reality, general S1 and R are fixed, and other
Parameter is adjustable, therefore to obtain optimised process, is had to a, H, S2 control in a rational scope.
For this reason, having done two groups of simulated experiments using DEFORM softwares, the extruding force of the flat prod cast of the utility model has been obtained
With the variation tendency of a, the extruding force of the flat prod cast of the utility model with H variation tendency, so that it is determined that the value range of a,
Again by the size and distributed architecture in the dead band in FInite Element, Pythagorean theorem and extrusion process, the parameter of mould has been obtained
Formula：
What wherein a was represented is the cone angle size of mould, and what H was represented is the height of prod cast part, and what S1 was represented is extrusion type
The sectional area size of material.What S2 was represented is the size (including S1 parts) of straight angle section near die orifice, and what R was represented is the straight of blank
Footpath.During produce reality, general S1 and R are fixed, and other specification is adjustable, therefore to obtain optimised process,
Have to a, H, S2 control in a rational scope.
It it is 25 ° to 30 ° by the value range value of a first according to experiment.
Then further according to extrusion ratio and dead band thickness, the scope of proportionality coefficient C is further determined that by experiment, it is comprehensive to examine
Consider, the value of C is more suitable between 3.3 to 5, and C values remove the limit when extrusion ratio is big；Capping when extrusion ratio is small；If extrusion ratio
During more than 38, the value of C should be slightly less than 3.3, but not be smaller than 3.
Then, according to formula 1-1, it is possible to obtain the height H of prod cast part.
Table 1 is the dead band heights Experiment proof list for the pole section bar that diameter 13mm is extruded using the round bar of diameter 80mm
Lattice：
Table 1：The form of dead band heights Experiment is carried out using the pole section bar of the round bar extrusion diameter 13mm of diameter 80mm
Data in table 1 select to be preferably and H first is scheduled on 10-50mm's or so according to the result fed back in Fig. 7
In the range of (because in the range of this extruding force smaller), based on H, obtain corresponding C values and dead band thickness e under different H
Situation of change, wherein the specific size selection of H is all based on the result that one group of data is fed back and adjusts to obtain in every group of data.
, can be according to reasonable according to table 1 for the aluminum alloy round bar of diameter 80mm is extruded diameter 13mm pole section bars
Dead band thickness so that it is determined that the value range of C, wherein the 3rd, 4 group of dead band size is more suitable, so as to further determine that C's
Preferred values.
For the aluminum alloy round bar of diameter 80mm is extruded diameter 13mm pole section bars, the flat prod cast of the utility model
The design parameter of one of preferred embodiment is：C is 3.58, S2For 784.27mm2, S1For 132.73mm2, r 6.5mm, a
For 30 °, H 48mm, extruding force is 221 tons, and dead band thickness e is 6mm.As a comparison another uses the embodiment of Fig. 4,
Before optimizing in embodiment, proportionality coefficient C is 5.91, and extruding force is 219 tons, and dead band thickness e is 9mm.Although squeezed before and after optimization
Pressure substantially has no change, but dead band thickness is reduced, and not only reduces waste material, also gives full play to blank in mould
Processability in cavity；Compared with common flat prod cast and prod cast, the flat prod cast of the utility model is more effortless.The utility model
Flat prod cast its stress it is more uniform, add the service life of mould.In addition, the utility model proposes a kind of brand-new c values are excellent
Change method, realizes the further optimization to new flat prod cast.Present invention may apply to copper, copper alloy, aluminium or aluminium alloy and
Other are adapted to the metal of extruding.
The above descriptions are merely exemplary embodiments of the present utility model, is not limited to the model of the utility model
Enclose.It can be mutually combined under conditions of not conflicting for each part of the utility model, any those skilled in the art,
Made equivalent variations and modification on the premise of the design of the utility model and principle is not departed from, it is new should all to belong to this practicality
The scope of type protection.
Claims (8)
1. a kind of flat prod cast of extruding metal, it is characterised in that the flat prod cast of extruding metal includes：
The die hole and die orifice being connected up and down successively；The axis of the die hole and the axis of die orifice overlap；
The die hole is taper type cavity, and the die orifice is column type cavity or ladder column type cavity；
The die hole has upper port and a lower port, and the upper port of the die hole is the entrance of die hole, the lower port of the die hole
For the outlet of die hole, the lower port of the die hole connects the entrance of the die orifice；
A diameter of R of the upper port of the die hole, the sectional area of the lower port of the die hole is S2, the upper port of the die hole
Diameter is more than the diameter of the lower port of the die hole, and the height of the die hole is H, and the taper of the die hole is a；
The sectional area of the inlet of the die orifice is S1；The lower port of the die hole and the entrance of the die orifice are generally aligned in the same plane
On；
The diameter R of the upper port of the die hole is equal to the internal diameter of extrusion cylinder, S2More than S1, S2With S1Between for the annular flat at die orifice
Taiwan area domain.
2. the flat prod cast of extruding metal as claimed in claim 1, it is characterised in that the value of the taper a of the die hole arrives for 25 °
30°。
3. the flat prod cast of extruding metal as claimed in claim 1, it is characterised in that the flat prod cast of extruding metal is according to following public affairs
Formula determines parameter：
<mrow>
<mi>H</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mi>R</mi>
<mo>-</mo>
<mn>2</mn>
<mi>r</mi>
<msqrt>
<mi>C</mi>
</msqrt>
</mrow>
<mrow>
<mn>2</mn>
<mi>tan</mi>
<mi> </mi>
<mi>a</mi>
</mrow>
</mfrac>
<mo>;</mo>
</mrow>
<mrow>
<mi>C</mi>
<mo>=</mo>
<mfrac>
<msub>
<mi>S</mi>
<mn>2</mn>
</msub>
<msub>
<mi>S</mi>
<mn>1</mn>
</msub>
</mfrac>
<mo>;</mo>
</mrow>
Wherein, the unit of a is degree, and C is proportionality coefficient, and the unit of H, R and r are millimeter, and r represents the circumscribed circle of the entrance of die orifice
Radius, R represent the upper port diameter of die hole, S2With S1Unit be square millimeter.
4. the flat prod cast of extruding metal as claimed in claim 3, it is characterised in that the value of C is 3 to 5.
5. the flat prod cast of extruding metal as claimed in claim 3, it is characterised in that a is further 30 °, and H further arrives for 30
50mm。
6. the flat prod cast of extruding metal as claimed in claim 3, it is characterised in that the value of C is further 3.3 to 5.
7. the flat prod cast of extruding metal as claimed in claim 1, it is characterised in that the extrusion ratio of the flat prod cast of extruding metal is big
In 12.
8. the flat prod cast of extruding metal as claimed in claim 1, it is characterised in that R 80mm, S2For 784.27mm2, S1For
132.73mm2, r 6.5mm, a are 30 °, H 48mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721219797.XU CN207308606U (en) | 2017-09-22 | 2017-09-22 | The flat prod cast of extruding metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721219797.XU CN207308606U (en) | 2017-09-22 | 2017-09-22 | The flat prod cast of extruding metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207308606U true CN207308606U (en) | 2018-05-04 |
Family
ID=62383683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721219797.XU Expired - Fee Related CN207308606U (en) | 2017-09-22 | 2017-09-22 | The flat prod cast of extruding metal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207308606U (en) |
-
2017
- 2017-09-22 CN CN201721219797.XU patent/CN207308606U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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Granted publication date: 20180504 Termination date: 20210922 |