CN108555053A - Porous extruding microchannel flat pipe mould of one kind and preparation method thereof - Google Patents
Porous extruding microchannel flat pipe mould of one kind and preparation method thereof Download PDFInfo
- Publication number
- CN108555053A CN108555053A CN201810288193.3A CN201810288193A CN108555053A CN 108555053 A CN108555053 A CN 108555053A CN 201810288193 A CN201810288193 A CN 201810288193A CN 108555053 A CN108555053 A CN 108555053A
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- China
- Prior art keywords
- upper mold
- mold core
- lower die
- die holder
- material path
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Classifications
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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
- 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
- B21C25/00—Profiling tools for metal extruding
- B21C25/10—Making tools by operations not covered by a single other subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention discloses a kind of porous extruding microchannel flat pipe moulds and preparation method thereof, and mold includes die holder, and multiple material paths and lower die cavity are offered on the die holder, and material path quantity is 2 times of lower die cavity quantity；Two material paths of adjacent connection are that a material path combines, and each material path combination is connected to a corresponding lower die cavity；The combination of direction material path is squeezed out along material and is divided into charge channel section and soldering chamber, and being provided with mould bridge in charge channel section cavity is separated, and upper mold core bore is offered on mould bridge；It is embedded in each lower die cavity there are one lower matrix, lower die on piece offers tapping channel and lower die work band, and tapping channel is connected to lower die work band；Upper mold core there are one being embedded in each upper mold core bore, wherein after the mould tongue of upper mold core passes through upper mold core bore, soldering chamber, be located in lower die work band.Using porous extruding microchannel flat pipe mould, a die holder can squeeze out more porous micro channel flat tubes simultaneously, reduce cost, improve efficiency.
Description
Technical field
The present invention relates to a kind of porous extruding microchannel flat pipe moulds and preparation method thereof.
Background technology
The porous aluminium flat conduit in microchannel, is widely used in the field of air conditioning for automobiles, domestic air conditioning, is the master for manufacturing heat exchanger
Want material.Porous aluminium flat conduit width is generally 12-16 millimeters, is highly 1-2 millimeters, basal area is generally 0.1 square centimeter；One
The porous aluminium flat conduit of meter Chang Du, weight only have 25-30 grams.Since the basal area of the porous aluminium flat conduit in microchannel is very small, if adopted
If being squeezed with single hole, with 8 inches of extrusion cylinder, extrusion ratio will reach 3150 times or so；If squeezed using six holes, that is squeezed
Pressure ratio will also reach 500 times or more, than aluminium extrusion technological procedure extrusion ratio (8-50 times) limiting value, it is taller go out 10
Times.Therefore, the extruding of aluminium flat conduit has very big difficulty, leads to the design of porous micro channel flat tube product extrusion die, has
There is highly difficult, high-cost feature.
The mold of conventional extruded micro-channel flat, a mold can only once squeeze out a micro-channel flat, for example adopt
Six roots of sensation micro-channel flat is squeezed out with 8 inches of extrusion cylinders simultaneously, it is necessary to which six molds, six molds are packed into a die sleeve jointly
In, there are six the chambers that can accommodate mold in die sleeve.This kind of mold at present, mainly from South Korea and German import, but price is most expensive,
Cause the manufacturing cost of the mold of micro-channel flat per ton, up to 3000 yuan/ton or more, cause to squeeze of high cost, efficiency is low.
Invention content
The purpose of the present invention is to provide a kind of porous extruding microchannel flat pipe moulds and preparation method thereof, solve existing skill
The porous aluminium flat conduit in microchannel is squeezed into this height, the low technical problem of efficiency in art.
In order to solve the above-mentioned technical problem the present invention, adopts the following technical scheme that：
A kind of porous extruding microchannel flat pipe mould, including die holder offer multiple material paths on the die holder and lower die are recessed
Chamber, material path quantity are 2 times of lower die cavity quantity；Two material paths of adjacent connection are that a material path combines, each material path combination
It is connected to a corresponding lower die cavity；The combination of direction material path, which is squeezed out, along material is divided into charge channel section and soldering chamber, wherein charge channel
It is provided with mould bridge in section cavity to be separated, upper mold core bore is offered on mould bridge；Lower die there are one being embedded in each lower die cavity
Piece, lower die on piece offer tapping channel and lower die work band, and tapping channel is connected to lower die work band；In each upper mold core bore
Upper mold core there are one being embedded, wherein after the mould tongue of upper mold core passes through upper mold core bore, soldering chamber, be located in lower die work band, and edge
The direction observation on vertical die holder surface, each material path combination and a corresponding lower die cavity, mould bridge, upper mold core bore, soldering chamber,
The center of lower die work band and tapping channel overlaps.
Using porous extruding microchannel flat pipe mould, aluminum component is fitted into multiple material paths, in extrusion process, due to huge
Squeeze friction, make aluminum component at molten condition, subsequently into bonding container, between mould tongue peripheral surface and lower die work band inner wall
Gap squeeze out, become porous micro channel flat tube, and export from tapping channel.It can be squeezed out more than more simultaneously using a die holder
Hole micro-channel flat reduces cost, improves efficiency.
It is further improved, limit bank is provided on the hole wall of the upper mold core bore, upper mold core corresponding position is provided with positioning
Step, after the upper mold core is embedded in upper mold core bore, limit bank is matched with positioning step, and the position of upper mold core is made to be fixed,
Ensure that mould tongue does not misplace with lower die work band, it is ensured that squeeze out the quality of flat tube.
It being further improved, the die holder is discoid, and easy to process, material path quantity is 12, and lower die cavity is six,
Six material path combinations are radially uniformly distributed using the center of die holder as the center of circle, and the die holder uniform force in extrusion process will not
It shifts.
It is further improved, the material path, lower die work band and tapping channel are waist-shaped hole, wherein material path, lower die work band
For straight hole, tapping channel is bellmouth.Tapping channel is bellmouth, then the inner wall of tapping channel is inclined surface, when aluminium passes through
It squeezes after work band outflow, into tapping channel, since the inner wall of tapping channel is an inclined surface, and has again very high
Finish, so flow into tapping channel in pre-profiling microchannel aluminium flat conduit by under gravity can along rear cavity wall always
Mold is skidded off, microchannel aluminium flat conduit product is formed, effectively prevents the porous microchannel aluminium flat conduit of pre-profiling in rear cavity
Obstruction, solve the problems, such as porous micro channel flat tube mold lift one's head it is difficult this.
It is further improved, is opened up on the die holder there are four pin hole, pass through pin hole positioning mould holder.
A kind of porous preparation method for squeezing microchannel flat pipe mould, includes the following steps：
Step 1: making die holder blank, lower matrix blank and upper mold core blank；To needed on die holder blank process material path,
The position center of upper mold core bore and pin hole drills wire hole, to needing to process tapping channel and lower die work band on lower matrix blank
Position center drill wire hole；Upper mold core blank is processed into upper mold core；Then to above-mentioned treated die holder blank, lower die
Piece blank and upper mold core are heat-treated, and intensity is improved；
Step 2: copper wire is passed through corresponding wire hole, processed on die holder blank using wire cutting multiple material paths, on
Mold core hole and pin hole, cumulative errors are not more than 0.005mm, and precision is high；
Then multiple lower die cavitys are milled out using milling machine corresponding position on die holder blank, each lower die cavity with it is corresponding
For the deviation in the mold core hole in material path, mould bridge no more than 0.01mm, precision is high；
Tapping channel and lower die work band are processed on lower matrix blank using low-speed WEDM, lower matrix is made.
The wire travelling speed of wire cutting in above-mentioned steps is less than 0.2mm/s, and wire cutting is copper wire with wire electrode, and wire electrode is straight
Diameter is 0.1mm-0.25mm.Using low-speed WEDM, make the interior of material path, upper mold core bore, tapping channel and lower matrix work band
Wall surface roughness is 0.3-0.5 μm, and any surface finish degree is very high compared with prior art, is conducive to microchannel aluminium flat conduit and squeezes out.
Step 3: die holder is heated to 500 DEG C, then multiple upper mold cores are installed in corresponding upper mold core bore, it will be more
A lower matrix is installed in corresponding lower die cavity, using transition fit tolerance, according to expanding with heat and contract with cold, it is cooling after upper mold core, under
Porous extruding microchannel flat pipe mould is made in gapless between matrix and die holder.
It is further improved, the thickness of the lower matrix is higher 0.05-0.1mm than the depth of die holder lower die cavity.
Compared with prior art, the beneficial effects of the invention are as follows：
1, using porous extruding microchannel flat pipe mould, aluminum component is fitted into multiple material paths, in extrusion process, due to huge
Big squeeze friction makes aluminum component at molten condition, subsequently into bonding container, from mould tongue peripheral surface and lower die work band inner wall it
Between gap squeeze out, become porous micro channel flat tube, and export from tapping channel.More can be squeezed out using a die holder simultaneously
Porous micro channel flat tube reduces cost, improves efficiency.
2, using low-speed WEDM, keep the inner wall surface of material path, upper mold core bore, tapping channel and lower matrix work band thick
Rugosity is 0.3-0.5 μm, and any surface finish degree is very high compared with prior art, is conducive to microchannel aluminium flat conduit and squeezes out.
Description of the drawings
Fig. 1 is the porous structural schematic diagram for squeezing microchannel flat pipe mould of the present invention.
Fig. 2 is the A-A sectional views of Fig. 1.
Fig. 3 is the B-B sectional views of Fig. 1.
Fig. 4 is the front view of die holder of the present invention.
Fig. 5 is the A-A sectional views of Fig. 4.
Fig. 6 is the B-B sectional views of Fig. 4.
Fig. 7 is the structural schematic diagram of upper mold core.
Fig. 8 is the left view of Fig. 5.
Fig. 9 is the vertical view of Fig. 5.
Figure 10 is the structural schematic diagram of lower matrix.
Figure 11 is the C-C sectional views of Figure 10.
Figure 12 is the D-D sectional views of Figure 10.
Specific implementation mode
To keep the purpose of the present invention and technical solution clearer, below in conjunction with the embodiment of the present invention to the skill of the present invention
Art scheme is clearly and completely described.
Embodiment one：
As shown in figs. 1-12, a kind of porous extruding microchannel flat pipe mould, including die holder, the die holder are discoid, mould
12 material paths 1 and six lower die cavitys 4 are offered on seat, two material paths 1 of adjacent connection are that a material path combines, each to expect
Road is combined to be connected to a corresponding lower die cavity 4, and material path combination is radially uniformly distributed using the center of die holder as the center of circle；Edge
Material squeeze out direction material path combination is divided into charge channel section and soldering chamber 5, be wherein provided in charge channel section cavity mould bridge 2 by its every
It opens, upper mold core bore 3 is offered on mould bridge 2；It is embedded in each lower die cavity 4 there are one lower matrix 13, is offered on lower matrix 13
Tapping channel 8 and lower die work band 7, tapping channel 8 are connected to lower die work band 7；It is upper there are one being embedded in each upper mold core bore 3
Mold core 12, wherein after the mould tongue 14 of upper mold core 12 passes through upper mold core bore 3, soldering chamber 5, be located in lower die work band 7, and along vertical
The direction observation on straight die holder surface, each material path combination and a corresponding lower die cavity, mould bridge, upper mold core bore, soldering chamber, under
Die worker makees band and the center of tapping channel overlaps.
Using porous extruding microchannel flat pipe mould, aluminum component is fitted into multiple material paths, in extrusion process, due to huge
Squeeze friction, make aluminum component at molten condition, subsequently into bonding container, between mould tongue peripheral surface and lower die work band inner wall
Gap squeeze out, become porous micro channel flat tube, and export from tapping channel.It can be squeezed out more than more simultaneously using a die holder
Hole micro-channel flat reduces cost, improves efficiency.
In the present embodiment, limit bank 6, the setting of 12 corresponding position of upper mold core are provided on the hole wall of the upper mold core bore 3
After having positioning step 9, the upper mold core 12 to be embedded in upper mold core bore 3, limit bank 6 is matched with positioning step 9, makes upper mold core
Position is fixed, and ensures that mould tongue does not misplace with lower die work band, it is ensured that squeeze out the quality of flat tube.
In the present embodiment, the material path 1, lower die work band 7 and tapping channel 8 are waist-shaped hole, wherein material path 1, lower die
Work band 7 is straight hole, and tapping channel 8 is bellmouth.Tapping channel is bellmouth, then the inner wall of tapping channel is inclined surface, when
Aluminium is after extruding is from work band outflow, into tapping channel, since the inner wall of tapping channel is an inclined surface, and again
With very high finish, so the microchannel aluminium flat conduit for flowing into pre-profiling in tapping channel is understood by under gravity along rear profile
Cavity wall skids off always mold, forms microchannel aluminium flat conduit product, and the porous microchannel aluminium flat conduit for effectively preventing pre-profiling exists
Block in cavity afterwards, solve the problems, such as porous micro channel flat tube mold lift one's head it is difficult this.
In the present embodiment, pin hole 11 there are four being opened up on the die holder, passes through pin hole positioning mould holder.
Embodiment two：
A kind of porous preparation method for squeezing microchannel flat pipe mould, includes the following steps：
Step 1: making die holder blank, lower matrix blank and upper mold core blank；To needed on die holder blank process material path,
The position center of upper mold core bore and pin hole drills wire hole, to needing to process tapping channel and lower die work band on lower matrix blank
Position center drill wire hole；Upper mold core blank is processed into upper mold core；Then to above-mentioned treated die holder blank, lower die
Piece blank and upper mold core are heat-treated, and intensity is improved；
Step 2: copper wire is passed through corresponding wire hole, processed on die holder blank using wire cutting multiple material paths, on
Mold core hole and pin hole, cumulative errors are not more than 0.005mm, and precision is high；
Then multiple lower die cavitys are milled out using milling machine corresponding position on die holder blank, each lower die cavity with it is corresponding
For the deviation in the mold core hole in material path, mould bridge no more than 0.01mm, precision is high；
Tapping channel and lower die work band are processed on lower matrix blank using low-speed WEDM, lower matrix is made.
The wire travelling speed of wire cutting in above-mentioned steps is less than 0.2mm/s, and wire cutting is copper wire with wire electrode, and wire electrode is straight
Diameter is 0.1mm-0.25mm.Using low-speed WEDM, make the interior of material path, upper mold core bore, tapping channel and lower matrix work band
Wall surface roughness is 0.3-0.5 μm, and any surface finish degree is very high compared with prior art, is conducive to microchannel aluminium flat conduit and squeezes out.
Step 3: die holder is heated to 500 DEG C, then multiple upper mold cores are installed in corresponding upper mold core bore, it will be more
A lower matrix is installed in corresponding lower die cavity, using transition fit tolerance, according to expanding with heat and contract with cold, it is cooling after upper mold core, under
Porous extruding microchannel flat pipe mould is made in gapless between matrix and die holder.
In the present embodiment, the thickness of the lower matrix is higher 0.05-0.1mm than the depth of die holder lower die cavity.
Do not done in the present invention illustrate be the prior art or can be realized by the prior art, and the present invention
Described in specific implementation case be only the present invention preferable case study on implementation, practical range not for the purpose of limiting the invention.
That is equivalent changes and modifications made by all contents according to scope of the present invention patent all should be used as the technology scope of the present invention.
Claims (7)
1. a kind of porous extruding microchannel flat pipe mould, which is characterized in that including die holder, multiple material paths are offered on the die holder
With lower die cavity, material path quantity is 2 times of lower die cavity quantity；Two material paths of adjacent connection are that a material path combines, each
Material path is combined to be connected to a corresponding lower die cavity；The combination of direction material path, which is squeezed out, along material is divided into charge channel section and soldering chamber,
It is provided with mould bridge in middle charge channel section cavity to be separated, upper mold core bore is offered on mould bridge；It is embedded in each lower die cavity
One lower matrix, lower die on piece offer tapping channel and lower die work band, and tapping channel is connected to lower die work band；On each
Upper mold core there are one being embedded in mold core hole, wherein after the mould tongue of upper mold core passes through upper mold core bore, soldering chamber, be located at lower die and work
It in band, and is observed along the direction on vertical die holder surface, each material path combination and a corresponding lower die cavity, mould bridge, upper mold core
Hole, soldering chamber, lower die work band and the center of tapping channel overlap.
2. porous extruding microchannel flat pipe mould according to claim 1, which is characterized in that the hole wall of the upper mold core bore
On be provided with limit bank, upper mold core corresponding position is provided with positioning step, in the upper mold core insertion upper mold core bore after, limit bank
It is matched with positioning step, the position of upper mold core is made to be fixed.
3. porous extruding microchannel flat pipe mould according to claim 1 or 2, which is characterized in that the die holder is disk
Shape, material path quantity are 12, and lower die cavity is six, and six material path combinations are radially uniform as the center of circle using the center of die holder
Distribution.
4. porous extruding microchannel flat pipe mould according to claim 3, which is characterized in that the material path, lower die work
Band and tapping channel are waist-shaped hole, wherein material path, lower die work band are straight hole, and tapping channel is bellmouth.
5. porous extruding microchannel flat pipe mould according to claim 4, which is characterized in that offer four on the die holder
A pin hole.
6. the porous preparation method for squeezing microchannel flat pipe mould of claim 1-5 any one of them, which is characterized in that including
Following steps：
Step 1: making die holder blank, lower matrix blank and upper mold core blank；To needing to process material path, upper mold on die holder blank
The position center of core bore and pin hole drills wire hole, to needing the portion of processing tapping channel and lower die work band on lower matrix blank
Position center drills wire hole；Upper mold core blank is processed into upper mold core；Then to above-mentioned treated die holder blank, lower matrix hair
Base and upper mold core are heat-treated；
Step 2: copper wire is passed through corresponding wire hole, multiple material paths, upper mold core are processed on die holder blank using wire cutting
Hole and pin hole, cumulative errors are not more than 0.005mm；
Then multiple lower die cavitys, each lower die cavity and corresponding material are milled out using milling machine corresponding position on die holder blank
The deviation in the mold core hole on road, mould bridge is no more than 0.01mm；
Tapping channel and lower die work band are processed on lower matrix blank using low-speed WEDM, lower matrix is made；
The wire travelling speed of wire cutting in above-mentioned steps is less than 0.2mm/s, and wire cutting is copper wire with wire electrode, and wire electrode is a diameter of
0.1mm-0.25mm；
Step 3: die holder is heated to 500 DEG C, then multiple upper mold cores are installed in corresponding upper mold core bore, under multiple
Matrix is installed in corresponding lower die cavity, using transition fit tolerance, after cooling between upper mold core, lower matrix and die holder continuously
Porous extruding microchannel flat pipe mould is made in gap.
7. the porous production method for squeezing microchannel flat pipe mould according to claim 6, which is characterized in that the lower die
The thickness of piece is higher 0.05-0.1mm than the depth of die holder lower die cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810288193.3A CN108555053A (en) | 2018-03-30 | 2018-03-30 | Porous extruding microchannel flat pipe mould of one kind and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810288193.3A CN108555053A (en) | 2018-03-30 | 2018-03-30 | Porous extruding microchannel flat pipe mould of one kind and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108555053A true CN108555053A (en) | 2018-09-21 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810288193.3A Withdrawn CN108555053A (en) | 2018-03-30 | 2018-03-30 | Porous extruding microchannel flat pipe mould of one kind and preparation method thereof |
Country Status (1)
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| CN (1) | CN108555053A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113305167A (en) * | 2021-03-22 | 2021-08-27 | 南京云海特种金属股份有限公司 | Aluminum flat tube extrusion die structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113305167A (en) * | 2021-03-22 | 2021-08-27 | 南京云海特种金属股份有限公司 | Aluminum flat tube extrusion die structure |
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Application publication date: 20180921 |
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