CN103658216A - Extrusion mold for aluminum alloy finned tube of open rack vaporizer - Google Patents
Extrusion mold for aluminum alloy finned tube of open rack vaporizer Download PDFInfo
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- CN103658216A CN103658216A CN201310621109.2A CN201310621109A CN103658216A CN 103658216 A CN103658216 A CN 103658216A CN 201310621109 A CN201310621109 A CN 201310621109A CN 103658216 A CN103658216 A CN 103658216A
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Abstract
The invention relates to an extrusion mold, in particular to an extrusion mold for an aluminum alloy finned tube of an open rack vaporizer. The extrusion mold comprises an upper mold (2.1), a lower mold (2.2) and a mold core (2.7), wherein the mold core integrated with the upper mold is arranged along an axis of the upper mold and connected with the outer wall of the upper mold through distributary bridges (2.5) uniformly distributed along the axis; the tail end of the mold core adopts a finned tube inner hole shape and a solid structure; the positions, corresponding to distributary holes in the upper mold, of the lower mold are sunken, and a chamber formed by the lower end of the mold core and the sunken outer sides is taken as a welding chamber after the lower mold and the upper mold are combined; through holes are formed in the lower mold along the axis and adopt finned tube appearance shapes and hollowed-out structures to form a working tape (2.8); and after the mold is assembled, a mold hole adopting a finned tube structure is formed between the working tape of the lower mold and the mold core, and a clearance structure (2.9) with a larger size is formed in the lower part of the mold hole in the lower mold. By means of the extrusion mold, the problem that an open rack vaporizer with a qualified size and high pressure-resistant property is still not produced in domestic due to constraint of a forming mold is solved.
Description
[technical field]
The present invention relates to a kind of extrusion die, be specifically related to aluminium alloy heat-exchange finned tube extrusion die for a kind of open-frame type gasifier.
[background technology]
Liquified natural gas (Liquefied Natural Gas) is applicable to transportation and stores, and liquified natural gas (LNG) gasifier is the key equipment in whole LNG supply chain, and conventional is open-frame type gasifier at present.Finned tube is open-frame type gasifier core component, and the voltage endurance capability of finned tube has determined the security performance of whole open-frame type gasifier, and the accuracy of manufacture directly affects the heat exchange efficiency of gasifier.Fin tube structure is complicated, as shown in Figure 1, not only has several outer fins 1.1, is also provided with some inner fins 1.2 in pipe, and finned tube length General Requirements is at 4～10 meters.In addition, finned tube dimension precision requirement precision is high, surface roughness requires 10 μ m≤Ra≤50 μ m, flexibility to require very strict≤2mm/m, and the precision of finned tube fin (outer fin 1.1 and inner fin 1.2) directly affects the heat exchange efficiency of gasifier and the assembly precision of gasifier.Finned tube environment for use is harsh, and during gasifier work, finned tube inside is the mist of liquified natural gas and gaseous natural gas, and temperature range is-162 ℃～20 ℃ (it is-196 ℃～60 ℃ that gasifier designs requires temperature), and internal pressure is up to 8 ~ 15MPa.At present, even domestic, do not produce qualified open-frame type gasifier finned tube, directly affected the localization process of open-frame type gasifier yet.
Application number is 201180025194.5, publication number is 102906529 A, name is called " multilayer heat-transfer pipe, the forming tool that the manufacture method of multilayer heat-transfer pipe and this manufacture method are used " patent application document in, disclose that " described forming tool possesses the guide portion that is formed with the inserting hole inserting for multilayer pipe material, guide portion has the guide surface of the angle that forms at least a portion of most inserting holes and stipulate with respect to the direction of insertion inclination of described multilayer pipe material, the sidepiece that goes out of inserting hole is the shape corresponding with the cross sectional shape of described multilayer heat-transfer pipe, described in guide surface, the opening that enters side of inserting hole is for roughly justifying shape, and the go out sidepiece of the cross sectional shape vertical with described direction of insertion from the described opening that enters side to described inserting hole changes continuously, going out side opening Area Ratio, to enter side opening area little ", it is large that the shaping blank that the method is used is prepared difficulty, cost is high, heat-transfer pipe forming process parent metal (Al) easily occurs flowing inhomogeneous with sacrificial anode covering material layer (Al+Zn), cause the tubing after moulding to have the problems such as layering, reduce the withstand voltage properties of tubing, dimensional accuracy and surface quality.
[summary of the invention]
In order to overcome the deficiency in background technology, the invention discloses a kind of open-frame type gasifier aluminum alloy finned tube extrusion die, the invention solves and affected by mould restraining factors, even domestic, do not produce the problem of the open-frame type gasifier use finned tube that size is qualified, withstand voltage properties is high, adopt the finned tube dimensional accuracy of extrusion modling of the present invention high, surface roughness is little, withstand voltage properties is high, meets the requirement of LNG open-frame type gasifier to finned tube.
For achieving the above object, the present invention adopts following technical scheme:
A kind of open-frame type gasifier aluminum alloy finned tube extrusion die, comprise patrix, counterdie and core rod, described patrix is cylindrical structural, along patrix axis, be provided with the core rod with patrix one, described core rod with patrix outer wall by being connected along the uniform shunting bridge of axis, patrix outer wall, the die cavity that core rod and the combination of shunting bridge surround is mold diversion hole, the cylindrical structure of core rod head, core rod end is hole shape entity structure in finned tube, described counterdie is cylindrical structural, counterdie and patrix tap hole correspondence position are provided with depression, the chamber being formed by core rod lower end and depression outside after counterdie and upper die combination is seam chamber, counterdie has through hole along axis, described through hole is finned tube appearance engraved structure formation work band, after die assembly, between the work band of counterdie and core rod, form nib, described nib structure is fin tube structure, counterdie nib bottom has the empty knife structure that size is larger, a side at upper die and lower die is provided with locating hole, described locating hole and alignment pin are connected, opposite side at upper die and lower die is provided with connecting bolt hole, described upper die and lower die pass described connecting bolt hole by connecting bolt and are linked together.
Described open-frame type gasifier aluminum alloy finned tube extrusion die, surrounding along through hole in the seam chamber plane of described counterdie is provided with protruding baffle groove, the through hole distance of described baffle slot pitch from counterdie along axis setting is 3～15mm, described baffle channel section is rectangle, described rectangle height is 3～10mm, width is 3～20mm, and the corner angle of described baffle groove adopt the transition of knuckle nature.
Described open-frame type gasifier aluminum alloy finned tube extrusion die, described empty knife structure is the step cutting pattern structure that size is larger, and described empty knife structure is borehole structure, and the diameter of described empty knife structure is 1.1D
1～2D
1.
Described open-frame type gasifier aluminum alloy finned tube extrusion die, the concave bottom of described counterdie and the setting of patrix tap hole correspondence position is plane, cup depth >=10mm.
Described open-frame type gasifier aluminum alloy finned tube extrusion die, the head of described core rod and end adopt arc transition, arc radius R > 50mm.
Described open-frame type gasifier aluminum alloy finned tube extrusion die, described counterdie cylinder external diameter is identical with patrix cylinder external diameter, and setting the outer fin top of aluminum alloy finned tube place circle external diameter is D
1, place, inner fin top circular diameter D
2, cylinder external diameter>=5 D of patrix
1, patrix outer wall thickness>=D
1, the core rod diameter of the cylindrical structure of head is 1.1D
1～2D
1.
Described open-frame type gasifier aluminum alloy finned tube extrusion die, the width>=5mm of described shunting bridge, tap hole place circumference external diameter is 2 D
1～4 D
1.
Described open-frame type gasifier aluminum alloy finned tube extrusion die, the width >=10mm of described work band.
Owing to adopting technical scheme as above, the present invention has following beneficial effect:
1, the finned tube dimensional accuracy high (± 0.5mm) going out with the extrusion modling of aluminum alloy finned tube extrusion die by described open-frame type gasifier, finned tube glacing flatness high (2mm/m), surface roughness little (10 μ m≤Ra≤30 μ m);
2, the design of alignment pin and locating hole, can accurately locate upper/lower die, strictly controls the relative position of inner fin and outer fin, guarantees the dimensional accuracy of finned tube;
3, the design of baffle groove further raises seam indoor metal pressure, improved the fusion effect of finned tube, make work band place whole cross section metal flow even simultaneously, eliminated the lamination of complex shapes, improved the withstand voltage properties of finned tube, result of hydraulic test surface, under 24MPa condition, pressurize 30min is without leakage, under air pressure conditions, 16MPa pressurize 30min is without leakage, and finned tube explosion limiting pressure reaches 90MPa, meets gasifier designs requirement.
[accompanying drawing explanation]
Fig. 1 is open-frame type gasifier fin tube structure schematic diagram;
Fig. 2 is open-frame type gasifier finned tube cross sectional representation;
Fig. 3 is vertical section structure schematic diagram of the present invention;
Fig. 4 is patrix cross section structure schematic diagram of the present invention;
Fig. 5 is nib of the present invention place cross-sectional structure schematic diagram;
In the drawings: 1.1, outer fin; 1.2, inner fin; 2.1, patrix; 2.2, counterdie; 2.3, alignment pin; 2.4, connecting bolt; 2.5, shunting bridge; 2.6, baffle groove; 2.7, core rod; 2.8, work band; 2.9, empty knife structure.
[specific embodiment]
By the following examples, can explain in more detail the present invention, disclose object of the present invention and be intended to protect all changes and improvements in the scope of the invention, the present invention is not limited to the following examples;
Setting the outer fin top of aluminum alloy finned tube place circle external diameter is D
1, place, inner fin top circular diameter D
2.
Open-frame type gasifier described in 2 ~ 4 aluminum alloy finned tube extrusion die by reference to the accompanying drawings, comprise patrix 2.1, core rod 2.7 and counterdie 2.2, described patrix 2.1 is cylindrical structural, along patrix 2.1 axis, be provided with the core rod 2.7 with patrix 2.1 one, described core rod 2.7 with patrix 2.1 outer walls by being connected along the uniform shunting bridge 2.5 of axis, the die cavity that patrix 2.1 outer walls, core rod 2.7 and 2.5 combinations of shunting bridge surround is mold diversion hole, width>=the 5mm of described shunting bridge 2.5, tap hole place circumference external diameter is 2 D
1～4 D
1.The cylindrical structure of core rod 2.7 head, core rod 2.7 ends are hole shape entity structure in finned tube, and the head of described core rod 2.7 and end adopt arc transition, arc radius R > 50mm.Described counterdie 2.2 is cylindrical structural, and described counterdie 2.2 cylinder external diameters are identical with patrix 2.1 cylinder external diameters, cylinder external diameter>=5 D of patrix 2.1
1, patrix 2.1 outer wall thickness>=D
1, core rod 2.7 diameters of the cylindrical structure of head are 1.1D
1～2D
1.Counterdie 2.2 is provided with depression with patrix 2.1 tap hole correspondence positions, and described concave bottom is plane, cup depth >=10mm.The chamber that counterdie 2.2 is formed by core rod 2.7 lower ends and depression outside after combining with patrix 2.1 is seam chamber, surrounding along through hole in the seam chamber plane of described counterdie 2.2 is provided with protruding baffle groove 2.6, described baffle groove 2.6 is 3～15mm apart from counterdie 2.2 along the through hole distance of axis setting, described baffle groove 2.6 sections are rectangle, described rectangle height is 3～10mm, width is 3～20mm, and the corner angle of described baffle groove 2.6 adopt the transition of knuckle nature.Counterdie 2.2 has through hole along axis, and described through hole is finned tube appearance engraved structure formation work band 2.8, the width >=10mm of described work band 2.8.After die assembly, the work of counterdie 2.2 be with 2.8 and core rod 2.7 between form nib, described nib structure is fin tube structure, counterdie 2.2 nib bottoms have the empty knife structure 2.9 that size is larger, described empty knife structure 2.9 is the step cutting pattern structure that size is larger, described empty knife structure 2.9 is borehole structure, and the diameter of described empty knife structure 2.9 is 1.1D
1～2D
1.A side at patrix 2.1 and counterdie 2.2 is provided with locating hole, described locating hole and alignment pin 2.3 are connected, opposite side at patrix 2.1 and counterdie 2.2 is provided with connecting bolt hole, and described patrix 2.1 and counterdie 2.2 are linked together through described connecting bolt hole by connecting bolt 2.4.
Described open-frame type gasifier aluminum alloy finned tube extrusion die, material adopts has good combination property, and wear-resisting, high temperature resistant, shock-resistant extruding and pulsating stress effect mould steel are made.
Implement open-frame type gasifier of the present invention aluminum alloy finned tube extrusion die, before extruding, first adopt alignment pin 2.3 by the fixing relative position of patrix 2.1 and counterdie 2.2, then adopt connecting bolt 2.4 that patrix 2.1 and counterdie 2.2 are connected in one, be arranged on mold base of extruder.During extruding, metal in recipient is shunted bridge 2.5 and is separated into some strands, along tap hole, flow into seam chamber, seam indoor metal carries out after seam under high temperature, condition of high voltage, flow through baffle groove 2.6, by core rod 2.7 and the nib of work with 2.8 formation, empty knife structure 2.9 after counterdie 2.2, finally forms the satisfactory finned tube of dimensional accuracy.
After measured, the finned tube surface roughness Ra of this mould manufacture is not more than 30 μ m, and glacing flatness is not more than 2mm/5m, be not more than ± 0.3mm of dimensional accuracy, the discovery of cross section metallographic structure analysis, during extruding, metal flow is even, cross section is without lamination, fusion face fusion is good, and pressure test result shows, hydraulic pressure 24MPa pressurize 30min, without leaking, air pressure 16MPa pressurize 30min, without leaking, meets gasifier designs and instructions for use.
Affected by mould restraining factors, even domestic, do not produce the problem of the open-frame type gasifier use finned tube that size is qualified, withstand voltage properties is high, open-frame type gasifier of the present invention aluminum alloy finned tube extrusion die, produce withstand voltage properties, dimensional accuracy, high-efficient aluminium alloy heat-exchange finned tube that surface quality is qualified, fill the domestic gaps, meet open-frame type gasifier production domesticization demand.
Part not in the detailed description of the invention is prior art.
The embodiment selecting in this article in order to disclose object of the present invention, current think suitable, but will be appreciated that, the present invention is intended to comprise that all belong to all changes and the improvement of the embodiment in this design and the scope of the invention.
Claims (8)
1. an open-frame type gasifier aluminum alloy finned tube extrusion die, comprise patrix (2.1), counterdie (2.2) and core rod (2.7), it is characterized in that: described patrix (2.1) is cylindrical structural, along patrix (2.1) axis, be provided with the core rod (2.7) with patrix (2.1) one, described core rod (2.7) with patrix (2.1) outer wall by being connected along the uniform shunting bridge (2.5) of axis, patrix (2.1) outer wall, the die cavity that core rod (2.7) and shunting bridge (2.5) combination surround is mold diversion hole, the cylindrical structure of core rod (2.7) head, core rod (2.7) end is hole shape entity structure in finned tube, described counterdie (2.2) is cylindrical structural, counterdie (2.2) and patrix (2. 1) tap hole correspondence position is provided with depression, the chamber being formed by core rod (2.7) lower end and depression outside after counterdie (2.2) combines with patrix (2.1) is seam chamber, counterdie (2.2) has through hole along axis, described through hole is finned tube appearance engraved structure formation work band (2.8), after die assembly, between the work band (2.8) of counterdie (2.2) and core rod (2.7), form nib, described nib structure is fin tube structure, counterdie (2.2) nib bottom has the empty knife structure (2.9) that size is larger, a side at patrix (2.1) and counterdie (2.2) is provided with locating hole, described locating hole and alignment pin (2.3) are connected, opposite side at patrix (2.1) and counterdie (2.2) is provided with connecting bolt hole (2.4), described patrix (2.1) and counterdie (2.2) are linked together through described connecting bolt hole by connecting bolt (2.4).
2. open-frame type gasifier according to claim 1 aluminum alloy finned tube extrusion die, it is characterized in that: the surrounding along through hole in the seam chamber plane of described counterdie (2.2) is provided with protruding baffle groove (2.6), described baffle groove (2.6) is 3～15mm apart from counterdie (2.2) along the through hole distance of axis setting, described baffle groove (2.6) section is rectangle, described rectangle height is 3～10mm, width is 3～20mm, and the corner angle of described baffle groove (2.6) adopt the transition of knuckle nature.
3. open-frame type gasifier according to claim 1 aluminum alloy finned tube extrusion die, it is characterized in that: described empty knife structure (2.9) is the larger step cutting pattern structure of size, described empty knife structure (2.9) is borehole structure, and setting the outer fin top of aluminum alloy finned tube place circle external diameter is D
1, place, inner fin top circular diameter D
2, the diameter of described empty knife structure (2.9) is 1.1D
1～2D
1.
4. open-frame type gasifier according to claim 1 aluminum alloy finned tube extrusion die, is characterized in that: described counterdie (2.2) is plane with the concave bottom of patrix (2.1) tap hole correspondence position setting, cup depth >=10mm.
5. open-frame type gasifier according to claim 1 aluminum alloy finned tube extrusion die, is characterized in that: the head of described core rod (2.7) and end adopt arc transition, arc radius R > 50mm.
6. open-frame type gasifier according to claim 1 aluminum alloy finned tube extrusion die, is characterized in that: described counterdie (2.2) cylinder external diameter is identical with patrix (2.1) cylinder external diameter, and setting the outer fin top of aluminum alloy finned tube place circle external diameter is D
1, place, inner fin top circular diameter D
2, cylinder external diameter>=5 D of patrix (2.1)
1, patrix (2.1) outer wall thickness>=D
1, the core rod of the cylindrical structure of head (2.7) diameter is 1.1D
1～2D
1.
7. open-frame type gasifier according to claim 1 aluminum alloy finned tube extrusion die, is characterized in that: the width>=5mm of described shunting bridge (2.5), tap hole place circumference external diameter is 2 D
1～4 D
1.
8. open-frame type gasifier according to claim 1 aluminum alloy finned tube extrusion die, is characterized in that: the width >=10mm of described work band (2.8).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108453142A (en) * | 2018-05-15 | 2018-08-28 | 湖北宏箭轻合金材料科技有限公司 | A kind of adjustable pipe class squeezes the mold and adjusting method of hole size |
| CN109967548A (en) * | 2019-04-01 | 2019-07-05 | 山东理工大学 | A kind of vehicle dormer window guide rail cantilever solid aluminium profile extrusion die and forming method |
| CN110290884A (en) * | 2017-02-13 | 2019-09-27 | 株式会社Uacj | The excellent aluminum extruded flat perforated pipe of outside surface anticorrosion corrosion and use aluminum-made heat exchanger made of it |
| CN111229852A (en) * | 2020-02-26 | 2020-06-05 | 凯维思轻量化智能制造研究院(菏泽)有限公司 | Extrusion die, device and method for realizing bidirectional extrusion forming process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109967548A (en) * | 2019-04-01 | 2019-07-05 | 山东理工大学 | A kind of vehicle dormer window guide rail cantilever solid aluminium profile extrusion die and forming method |
| CN111229852A (en) * | 2020-02-26 | 2020-06-05 | 凯维思轻量化智能制造研究院(菏泽)有限公司 | Extrusion die, device and method for realizing bidirectional extrusion forming process |
| 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 |
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