CN103028625A - Device and method for fabricating internal tooth thread aluminium pipe - Google Patents
Device and method for fabricating internal tooth thread aluminium pipe Download PDFInfo
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- CN103028625A CN103028625A CN2012105810078A CN201210581007A CN103028625A CN 103028625 A CN103028625 A CN 103028625A CN 2012105810078 A CN2012105810078 A CN 2012105810078A CN 201210581007 A CN201210581007 A CN 201210581007A CN 103028625 A CN103028625 A CN 103028625A
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Abstract
The invention discloses a device and a method for fabricating an internal tooth thread aluminium pipe. The device comprises an extrusion device applying an acting force on an aluminium product, and a mold matched with the extrusion device, wherein the mold and the extrusion device form a mutually communicated aluminium product passage; the aluminium product passes through the aluminium product passage and then forms an aluminium pipe; the aluminium product passage is internally provided with an internal tooth core head fixed in the mold; and the internal tooth core head allows corresponding internal tooth threads to be formed on an internal wall of the extruded aluminium pipe. With the adoption of the aluminum extrusion mold with the rotating internal tooth core head, an auxiliary tool and a driving motor for providing corresponding rotation power for the internal tooth core head, and an aluminium pipe speed measurement device for providing a control signal for the driving motor, more aluminium alloy designations, wider product specifications and dimensions, more complicated internal tooth heights and shapes, and more precise internal tooth spiral angles can be produced and processed.
Description
Technical field
The present invention relates to the tubing preparation method, be specifically related to a kind of devices and methods therefor of making the internal tooth thread aluminum pipe.
Background technology
Along with progress and the development of air conditioner refrigerating technology, " with aluminium for copper " and in pipe, increase in tooth thread obtained great development with technology such as raising heat exchange properties as the industry direction of first developing in the industry.As everyone knows, 30% of the not enough copper valency of aluminum current valency, the aluminium quality only is 30% of copper simultaneously, in the today of advocating energy-saving and emission-reduction, aluminium shows out extremely strong economic worth especially for copper.
Owing to have potential difference between the copper aluminum metal, electrochemical corrosion makes thermal resistance increasing between copper pipe and aluminium fin after long-time the use, and heat exchanger effectiveness descends, and causes Energy Efficiency Ratio to reduce.The all-aluminium construction pipe-line system has then been avoided this inherent shortcoming, has also reduced simultaneously the welding between the dissimilar metals, is conducive to improve the refrigeration system long term reliability.
Compare with common aluminum pipe, because riffled tube can effectively improve long-pending 2～3 times of pipe internal surface, the turbulent flow that in addition forms makes heat conduction efficiency improve 1.3～1.5 times.It is reported, at present the general diameter of energy-efficient inner screw thread copper pipe in the copper pipe industry below the 9.52mm, diapire thick below 0.25mm, addendum angle is between 20 °～40 °.The tall and thin teeth internal screwed copper tube diameter of a new generation generally below the 7mm, tooth depth be 0.20～0.24mm, addendum angle between 10 °～20 °, the more common inner screw thread copper pipe material-saving of this product is more than 5%, the exterior heat exchange area increases more than 14.4% in the copper pipe.
At present in traditional tube-making process, the basic skills of forming internal threads is to alleviate when wall thickness is increased by stretching, along placing the hand of spiral on the pipe inner core rod to produce internal thread.
One of its method is the drawing and forming method, and this method must have great tensile force, because the increase of tensile force and thread forming power, produce heating and disconnected pipe phenomenon, in addition, also cause the generation of crackle, therefore, this technique is not suitable for processing dark internal thread when producing thick-walled pipe.
Two of method is cold rolling methods of forming: be characterized in that because tubing partly contacts with roll tensile load is descended, and the heat that process produces is less, can form darker internal thread, can produce thick-walled pipe; But its shortcoming is that the pipe feeding speed is lower, and adjusting roll needs long time and advanced technology, because the bolster of roll determines the rigidity of mould, so the precision of production tube is bad.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of devices and methods therefor of making the internal tooth thread aluminum pipe, the Aluminum-Extruding Die of the internal tooth core print by adopting the band rotation, for the internal tooth core print provides the auxiliary mould of corresponding rotary power and drive motors and for drive motors provides the aluminum pipe speed measuring device of control signal, can the more aluminium alloy trade mark of production and processing, wider product specification size, more complicated interior tooth height and shape, more accurate internal tooth spiral angle.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of device of making the internal tooth thread aluminum pipe comprises:
Aluminium is applied the pressurizing unit of active force,
And the mould that matches with pressurizing unit, mould and pressurizing unit form an aluminium passage that mutually connects, and aluminium forms aluminum pipe after by the aluminium passage,
The one internal tooth core print that is fixed in the mould is set in the described aluminium passage, and the internal tooth core print forms corresponding interior tooth thread with the aluminum pipe inwall of extruding.
Preferably, described mould comprises upper die and lower die, the aluminium passage is communicated with the hole, slit that upper die and lower die form, the internal tooth core print is arranged at the hole, slit and is in communication with the outside the place, the rotation mandrel runs through upper die and lower die, the internal tooth core print is fixedly connected with on the rotation mandrel, and rotation mandrel one end also connects the drive link that rotary power is provided.
Preferably, the end of described rotation mandrel is provided with angular wheel, and angular wheel is in transmission connection with the drive link that is connected drive motors.
Preferably, described drive motors is connected with servo controller, also be provided with a velometer in the aluminum pipe side that machines, servo controller and velometer are interconnected, velometer is measured the extrusion speed of aluminum pipe, according to extrusion speed, regulate in real time the rotation of drive motors by servo controller, so that drive motors flows to the rotating speed of drive link is consistent with the extrusion speed of mensuration.
Preferably, described pressurizing unit comprises ingot-containing tube and the pressure ram of hollow, and described pressure ram moves freely in ingot-containing tube, and the aluminium of placing in the ingot-containing tube is continuously applied active force.
A kind of method of making the internal tooth thread aluminum pipe may further comprise the steps:
1) is positioned in the ingot-containing tube with heat insulation function through the aluminium that is heated to 460～510 ℃;
2) pressure ram is continuously applied active force to aluminium, so that aluminium enters aluminium passage and mould, and extrudes from the hole, slit of mould, wherein extruding force 〉=the 600MPa of pressure ram;
3) in step 2) extrusion in, the velometer the real time measure is extruded the extruded velocity of aluminum pipe, the extruded velocity of aluminum pipe is controlled at 20～80m/min, in the mould with the internal tooth core print of internal tooth screw thread form under the effect of drive motors and drive link, make corresponding synchronous rotary according to measured extruded velocity, so that the aluminum pipe inwall of extruding forms the interior tooth thread of the corresponding number of degrees.
Preferably, the aluminum pipe that machines is collected by coiling device, for follow-up.
By technique scheme, the invention has the beneficial effects as follows:
One of advantage of the present invention is: when adopting method of the present invention to produce the internal tooth thread aluminum pipe, because its internal tooth geomery is by internal tooth core print and corresponding extruding and the accurately control of rotary speed institute, so it is compared with the internal tooth thread aluminum pipe of the cold drawn cold-rolling process production of existing employing, have accurately controlled characteristics of internal tooth shape and size, can also produce simultaneously and adopt special tooth depth that cold drawn cold-rolling process can't process and the internal tooth thread aluminum pipe of profile of tooth.
Two of advantage of the present invention is: aspect production cost, because the aluminum pipe (light pipe) that uses in the cold drawn cold-rolling process also is to adopt hot extrusion technique to produce mostly, and then carry out the cold drawn cold rolling processing of multiple tracks, moreover per 2～3 roads are cold drawn just must carry out an intermediate annealing heat treatment.
The present invention then can settle at one go by hot extrusion technique and produce the internal tooth thread aluminum pipe, as long as higher dimensional precision person is also carried out at most 1～2 to cold drawn finishing processing, thereby saved traditional intermediate annealing heat treatment, so on production cost, also just be lower than the cold drawn cold rolling processing technology of traditional multiple tracks, have good economic and social benefit.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the syndeton schematic diagram of drive link of the present invention and device.
Fig. 3 is the enlarged drawing of mould of the present invention.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
See figures.1.and.2, a kind of device of making the internal tooth thread aluminum pipe, comprise: the pressurizing unit 1 that aluminium 6 is applied active force, and the mould 2 that matches with pressurizing unit 1, mould 2 forms an aluminium passage 3 that mutually connects with pressurizing unit 1, aluminium passes through aluminium passage 3 rear formation aluminum pipes 5, the described aluminium passage 3 interior internal tooth core prints 4 that are fixed in the mould 2 that arrange, and internal tooth core print 4 forms corresponding interior tooth thread with aluminum pipe 5 inwalls of extruding.
Pressurizing unit 1 comprises ingot-containing tube 7 and the pressure ram 8 of hollow, and described pressure ram 8 moves freely in ingot-containing tube 7, and the aluminium 6 of placing in the ingot-containing tube 7 is continuously applied active force.
Device also comprises external transmission device, transmission device comprises drive motors 9, drive motors 9 is connected with servo controller 10, also be provided with a velometer 11 in aluminum pipe 5 sides that machine, servo controller 10 is interconnected with velometer 11, and velometer 11 is measured the extrusion speed of aluminum pipe 5, according to extrusion speed, regulate in real time the rotations of drive motors 9 by servo controller 10, so that drive motors 9 flows to the rotating speed of drive link 12 is consistent with the extrusion speed of mensuration.
With reference to Fig. 3, mould 2 comprises patrix 2a and counterdie 2b, described patrix 2a and counterdie 2b are fixed on the die sleeve 13, also be provided with die-cushion 14 in die sleeve 13 1 sides, aluminium passage 3 is communicated with hole, the slit 2c that patrix 2a and counterdie 2b form, and internal tooth core print 15 is arranged at hole, slit 2c and is in communication with the outside the place, and rotation mandrel 16 runs through patrix 2a and counterdie 2b, internal tooth core print 15 is fixedly connected with on the rotation mandrel 16, and rotation mandrel 16 1 ends also connect the drive link 12 that rotary power is provided.
The end of rotation mandrel 16 is provided with angular wheel 17, and angular wheel 17 is in transmission connection with the drive link 12 that is connected drive motors 9, and drive link 12 runs through mould 2, and is provided with bearing 18 with the junction of mould 2.Junction at described rotation mandrel and patrix is provided with bearing 18 equally.
Above-mentioned all parts all uses the hot-work die steel material processing and fabricating.
Implementation procedure of the present invention is: be placed in the ingot-containing tube with heat insulation function through 460～510 ℃ alloy aluminium bar of heating, provide thrust towards mould by pressure ram, so that aluminium enters aluminium passage and mould, and from the hole, slit that upper die and lower die form, extrude, wherein the extruding force of pressure ram is that extruded velocity is controlled at 20～80m/min greater than 600MPa.In above-mentioned extrusion, in the mould with the internal tooth core print of internal tooth screw thread form under the effect of drive motors and drive link, make corresponding synchronous rotary according to measured extrusion speed, so that the aluminum pipe inwall of extruding forms the interior tooth thread of the corresponding number of degrees.
The internal tooth thread aluminum pipe produced is through necessary cooling (air-cooled, mist is cold or water-cooled), collect and (can supply the follow-up cold drawn reducing that carries out multi-pass by the device of coiling at production line rear portion again, also it can be used directly), also can after reaching certain-length, cut off, traversing to discharge pedestal stretch alignment and scale cutting etc., be heat-treatable strengthened such as the used aluminium alloy trade mark, the artificial aging that also can stipulate is processed.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (7)
1. a device of making the internal tooth thread aluminum pipe is characterized in that, comprising:
Aluminium is applied the pressurizing unit of active force,
And the mould that matches with pressurizing unit, mould and pressurizing unit form an aluminium passage that mutually connects, and aluminium forms aluminum pipe after by the aluminium passage,
The one internal tooth core print that is fixed in the mould is set in the described aluminium passage, and the internal tooth core print forms corresponding interior tooth thread with the aluminum pipe inwall of extruding.
2. a kind of device of making the internal tooth thread aluminum pipe according to claim 1, it is characterized in that: described mould comprises upper die and lower die, the aluminium passage is communicated with the hole, slit that upper die and lower die form, the internal tooth core print is arranged at the hole, slit and is in communication with the outside the place, the rotation mandrel runs through upper die and lower die, the internal tooth core print is fixedly connected with on the rotation mandrel, and rotation mandrel one end also connects the drive link that rotary power is provided.
3. a kind of device of making the internal tooth thread aluminum pipe according to claim 2, it is characterized in that: the end of described rotation mandrel is provided with angular wheel, and angular wheel is in transmission connection with the drive link that is connected drive motors.
4. a kind of device of making the internal tooth thread aluminum pipe according to claim 3, it is characterized in that: described drive motors is connected with servo controller, also be provided with a velometer in the aluminum pipe side that machines, servo controller and velometer are interconnected, velometer is measured the extrusion speed of aluminum pipe, according to extrusion speed, regulate in real time the rotation of drive motors by servo controller, so that drive motors flows to the rotating speed of drive link is consistent with the extrusion speed of mensuration.
5. a kind of device of making the internal tooth thread aluminum pipe according to claim 1, it is characterized in that: described pressurizing unit comprises ingot-containing tube and the pressure ram of hollow, described pressure ram moves freely in ingot-containing tube, and the aluminium of placing in the ingot-containing tube is continuously applied active force.
6. a method of making the internal tooth thread aluminum pipe is characterized in that, may further comprise the steps:
1) is positioned in the ingot-containing tube with heat insulation function through the aluminium that is heated to 460～510 ℃;
2) pressure ram is continuously applied active force to aluminium, so that aluminium enters aluminium passage and mould, and extrudes from the hole, slit of mould, wherein extruding force 〉=the 600MPa of pressure ram;
3) in step 2) extrusion in, the velometer the real time measure is extruded the extruded velocity of aluminum pipe, the extruded velocity of aluminum pipe is controlled at 20～80m/min, in the mould with the internal tooth core print of internal tooth screw thread form under the effect of drive motors and drive link, make corresponding synchronous rotary according to measured extruded velocity, so that the aluminum pipe inwall of extruding forms the interior tooth thread of the corresponding number of degrees.
7. a kind of method of making the internal tooth thread aluminum pipe according to claim 6 is characterized in that: the aluminum pipe that machines is collected by coiling device, for follow-up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105810078A CN103028625A (en) | 2012-12-27 | 2012-12-27 | Device and method for fabricating internal tooth thread aluminium pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105810078A CN103028625A (en) | 2012-12-27 | 2012-12-27 | Device and method for fabricating internal tooth thread aluminium pipe |
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| CN103028625A true CN103028625A (en) | 2013-04-10 |
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| CN2012105810078A Pending CN103028625A (en) | 2012-12-27 | 2012-12-27 | Device and method for fabricating internal tooth thread aluminium pipe |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769831A (en) * | 2014-01-15 | 2014-05-07 | 江西理工大学 | Production process of aluminum high-efficiency heat transfer pipe |
| CN104190736A (en) * | 2014-08-27 | 2014-12-10 | 山东科技大学 | Device and process for realizing amorphous metal continuous wire cladding by virtue of extrusion |
| CN109454123A (en) * | 2018-10-31 | 2019-03-12 | 河北欧通有色金属制品有限公司 | A kind of processing method of the toothed circular copper pipe of inner wall |
| CN111036809A (en) * | 2019-12-27 | 2020-04-21 | 内蒙古工业大学 | Extrusion equipment and processing method for internal threaded pipe |
| CN112718901A (en) * | 2020-11-17 | 2021-04-30 | 哈工大（威海）创新创业园有限责任公司 | Preparation process and extrusion die for magnesium alloy pipe under multiple strain paths |
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| CN1110634A (en) * | 1995-02-24 | 1995-10-25 | 石家庄铝厂 | Manufacture method and device of internal screw pipe |
| JPH09295040A (en) * | 1996-05-10 | 1997-11-18 | Hitachi Cable Ltd | Production of inner face worked metal tube |
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| CN102716936A (en) * | 2012-05-03 | 2012-10-10 | 张起成 | Method for producing internal screw thread aluminum pipe for heat exchanging |
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2012
- 2012-12-27 CN CN2012105810078A patent/CN103028625A/en active Pending
Patent Citations (5)
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| CN1110634A (en) * | 1995-02-24 | 1995-10-25 | 石家庄铝厂 | Manufacture method and device of internal screw pipe |
| JPH09295040A (en) * | 1996-05-10 | 1997-11-18 | Hitachi Cable Ltd | Production of inner face worked metal tube |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769831A (en) * | 2014-01-15 | 2014-05-07 | 江西理工大学 | Production process of aluminum high-efficiency heat transfer pipe |
| CN104190736A (en) * | 2014-08-27 | 2014-12-10 | 山东科技大学 | Device and process for realizing amorphous metal continuous wire cladding by virtue of extrusion |
| CN104190736B (en) * | 2014-08-27 | 2015-12-16 | 山东科技大学 | A kind of by extruding realize device and the technique that amorphous metal continues cladding wires |
| CN109454123A (en) * | 2018-10-31 | 2019-03-12 | 河北欧通有色金属制品有限公司 | A kind of processing method of the toothed circular copper pipe of inner wall |
| CN111036809A (en) * | 2019-12-27 | 2020-04-21 | 内蒙古工业大学 | Extrusion equipment and processing method for internal threaded pipe |
| CN111036809B (en) * | 2019-12-27 | 2022-02-11 | 内蒙古工业大学 | Extrusion equipment and processing method for internal threaded pipe |
| CN112718901A (en) * | 2020-11-17 | 2021-04-30 | 哈工大（威海）创新创业园有限责任公司 | Preparation process and extrusion die for magnesium alloy pipe under multiple strain paths |
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