CN204094300U - For the device of copper pipe in refrigeration plant and Al pipe butt welding - Google Patents
For the device of copper pipe in refrigeration plant and Al pipe butt welding Download PDFInfo
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- CN204094300U CN204094300U CN201420435518.3U CN201420435518U CN204094300U CN 204094300 U CN204094300 U CN 204094300U CN 201420435518 U CN201420435518 U CN 201420435518U CN 204094300 U CN204094300 U CN 204094300U
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Abstract
The utility model discloses a kind of device for copper pipe in refrigeration plant and Al pipe butt welding, comprise main frame and workbench, described main frame comprises main box, is provided with AC power, transformer, high-voltage rectifier, capacitance group, vacuum switch and flip flop equipment in main box; Described AC power is connected with high-voltage rectifier after transformer transformation, and described high-voltage rectifier is connected with each electric capacity of capacitance group simultaneously, and each electric capacity of capacitance group is connected with a vacuum switch respectively; The signal input part of described flip flop equipment is connected with AC power, and signal output part is connected with each vacuum switch simultaneously; Described workbench comprises stand and is arranged on the plumb joint on stand, and described plumb joint comprises conductive coil and collection chinaware, and described conductive coil is connected with each vacuum switch in main frame by coaxial cable simultaneously.The utility model achieves normal temperature welding, convenient, quick, and environmental protection more, welding cost is lower.
Description
Technical field
The utility model relates to metal welding techniques field, particularly relates to a kind of device for copper pipe in refrigeration plant and Al pipe butt welding.
Background technology
Along with copper material rise in price impact and the light-weighted demand of product, " aluminium is for copper " has become the important trend that product component manufactures.This just needs copper material and aluminum material to be linked into an integrated entity by welding procedure, is namely called copper aluminium welding.But copper and aluminium all belong to easy oxidation metal, and solderability is poor, good welding effect to be reached to the different-metal material welding of this copper and aluminium then very difficult.Therefore copper aluminium welding is an international welding difficult problem always.Existing solder technology has the following disadvantages:
1. copper aluminium welding traditionally commonly uses the method soldering copper aluminium of tining and molten tin, this method is shaping bad, there is no good intensity, the low workpiece that can not be welded on again under hot operation of fusing point due to tin, so this kind of technique is only suitable under normal temperature condition small workpiece uses, be difficult to be applied in the production of other products.
2. with welding method soldering copper aluminium such as thermofussion welding, friction welding (FW), electron beam welding, supersonic weldings, the problems such as the generation of residual stress and distortion can be caused due to uneven temperature field, welding joint fragility is out large, easily to crack and weld seam easily produces pore, there is fracture unavoidably in the workpiece welded, just may make electric conductor open circuit after there is fracture, make pipe leakage, so often do not reach the effect required in actual production.
3. in the production process of existing refrigeration plant, the weldering of copper pipe and copper pipe and copper pipe and base weld that most what adopt is all flame Heating Brazing technique, by soldering processes using solder (copper aluminium welding rod) as intermediate medium, make copper pipe together with Al pipe butt welding.The oxide-film of metal surface abolished by brazing flux (copper and aluminium welding cream) under high-temperature heating state, makes surface invade profit, is conducive to the solder after melting and flows in weld gap, make it more easily be filled in weld gap.Solder at high temperature melt and with two kinds of metal generation metallurgical reactions, solder is infiltrated in copper material and aluminium molecular structure by capillarity, forms stable metallurgy layer.Joint after welding is shaped better, tension shear behavior and conductive corrosion-resistant good, be copper aluminium welding method conventional at present.
But the method is defectiveness also: first, the formation of weld seam by siphon principle, the solder after fusing is flowed and fills the process of whole weld gap, by the impact of materials and process, and the impact of material surface cleaning state, all the time there is brazing flux rupture of membranes, clear and rich effect is bad, solder is caused to be filled uneven, the uniformity of joint can be affected, defect also can often (as pore, solidification cracking etc.), make weld joint air-tight index and the weld defect such as weld strength index is not up to standard, directly affect weldment quality and life-span.
In addition, traditional handicraft production environment is severe, and disaster hidden-trouble is large, dangerous; Labor strength is large, and welding efficiency is low; Welding quality is unstable, and joints unsightly; Welding process produces the negative effects to environment such as high temperature, heating, flue dust, waste gas.
Moreover, due to consume in a large number solder flux solder with other auxiliary materials, and high energy consumption etc., the welding cost of this prior welding mode is higher.
Summary of the invention
For prior art above shortcomings, the purpose of this utility model is just to provide a kind of device for copper pipe in refrigeration plant and Al pipe butt welding, and normal temperature welding is convenient, quick, and environmental protection more, welding cost is lower.
To achieve these goals, the technical solution adopted in the utility model is such: a kind of device for copper pipe in refrigeration plant and Al pipe butt welding, comprise main frame and workbench, it is characterized in that: described main frame comprises main box, be provided with the AC power of filter, transformer, high-voltage rectifier, capacitance group, vacuum switch and flip flop equipment in main box; Described AC power is connected with high-voltage rectifier after transformer transformation, and described high-voltage rectifier is connected with each electric capacity of capacitance group simultaneously, and each electric capacity of capacitance group is connected with a vacuum switch respectively; Described flip flop equipment comprises impulse generator, and the signal input part of this impulse generator is connected with AC power, and signal output part is connected with each vacuum switch simultaneously;
Described workbench comprises stand and is arranged on the plumb joint on stand, and described plumb joint comprises conductive coil and collection chinaware, and described conductive coil is connected with each vacuum switch in main frame by coaxial cable simultaneously.
Further, described plumb joint also comprises input end plate, exports end plate, collects chinaware location plug, collection chinaware location top board and interior pipe positioning sleeve;
Described conductive coil comprises 3 groups of coil-conductors, the two ends of described coil-conductor respectively with input end plate with export end plate and be connected, insulating barrier is provided with between adjacent two circle coil-conductors, be respectively arranged with an end insulation support plate in the outside of input end plate and output end plate, both ends insulation support plate is connected as a whole by insulated high-strength connecting bolt; Input end plate is connected respectively by the both positive and negative polarity of cable with the signal output part of impulse generator with output end plate;
Described collection chinaware is positioned at conductive coil and leads to axial line with conductive coil, a collection chinaware location plug is respectively equipped with at the two ends of collection chinaware, described collection chinaware location plug and collection chinaware coaxial inner conductor, the side that described collection chinaware location top board and interior pipe locating clamp plate utilize lock-screw to be separately fixed at both ends insulation support plate to deviate from mutually, thus collection chinaware location plug is pushed down, to lock the axial location of collection chinaware;
The middle part of described collection chinaware plug axially offers a through hole along it, the small end of described interior pipe positioning sleeve inserts in the through hole of right side collection chinaware plug, the outer face of collection chinaware plug is close to by shoulder step, and in the top board axial compression of right side collection chinaware location, the large end face of pipe positioning sleeve is also fixing.
Further, described capacitance group comprises the storage capacitor of 4 5kJ.
Compared with prior art, the utility model has the advantage of:
1, the utility model is different from the green of existing conventional soldering techniques and technique, environmental protection, low-carbon (LC) technique, the homogeneity of good conductivity or the overlap joint welding of different metal materials can be widely used in, the metal that particularly welding material attribute difference is very large has clear superiority (as: copper-steel, copper-aluminium, copper-magnesium, aluminium-steel, copper-stainless-steel, aluminium-stainless steel etc.);
2, whole welding process is without heating, belongs to solid State Welding, cold welding technique; After welding can not there is any change, without residual stress in the metallic character of weldment material; Bi-material forms the stable metallurgical binding of interatomic distance in seam face; It is evenly coated that solder side is 360 ° of faces of cylinder, and weld seam is fine and close and intensity is high; Welding point is aesthetic in appearance, surperficial without impression, not damaged; Can precisely controlled welding parameter, welding quality stable is reliable, and uniformity is good; Speed of welding is fast, one-shot forming, and production efficiency is high, and labour intensity is low, is applicable to produce in enormous quantities and automation; Without the need to any scaling powder, solder and protective gas, welding cost is low; Whole process without hot, radiationless, smokeless, without waste gas, no-spark, without splash, without the need to cooling water, consume without auxiliary material, energy consumption is very low, energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of plumb joint;
Fig. 3 is schematic block circuit diagram of the present utility model;
Fig. 4 is circuit theory diagrams of the present utility model.
In figure: 1-main box, 2-AC power, 3-high-voltage rectifier, 4-capacitance group, 5-flip flop equipment, 6-vacuum switch, 7-coaxial cable, 8-stand, 9-plumb joint, 91-conductive coil, 92-collection chinaware, 93-input end plate, 94-export end plate, 95-collection chinaware location top board, 96-interior pipe positioning sleeve, 97-insulating barrier, 98-insulation support plate, 99-connecting bolt, 910-collection chinaware plug, 911-lock-screw, 912-outer tube, 913-interior pipe.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment: see Fig. 1-Fig. 4, a kind of device for copper pipe in refrigeration plant and Al pipe butt welding, comprises main frame and workbench.Described main frame comprises main box 1, is provided with the AC power 2 of filter, transformer, high-voltage rectifier 3, capacitance group 4, vacuum switch 6 and flip flop equipment 5 in main box 1.Described AC power 2 is connected with high-voltage rectifier 3 after transformer transformation, and described high-voltage rectifier 3 is connected with each electric capacity of capacitance group 4 simultaneously, and each electric capacity of capacitance group 4 is connected with a vacuum switch 6 respectively; During concrete enforcement, described capacitance group 4 comprises the storage capacitor of 4 5kJ.Described flip flop equipment 5 comprises impulse generator, and the signal input part of this impulse generator is connected with AC power 2, and signal output part is connected with each vacuum switch 6 simultaneously.
Wherein, the electromagnetic pulse welder main circuit in the utility model is primarily of Capacitor banks, charging circuit and discharge circuit and circuits for triggering three part composition.AC power 2 is after transformer boost, after high-voltage rectifying, export DC current again charge to Capacitor banks, when charging voltage reaches setting numerical value, flip flop equipment 5 output pulse signal, the conducting of vacuum switch 6 pipe, the electric field energy be stored in Capacitor banks is rapidly to field coil (conductive coil 91 namely in plumb joint 9) electric discharge.The major function of this main frame is: capacitance group 4 is after completing high-voltage charging energy storage, and under triggering " signal " effect, big current vacuum switch 6 repid discharge, forms the pulse current of hundreds of and even thousands of " kilo-ampere ", for conductive coil 91 provides energy.Adopt simultaneously to the mode of 4 groups of energy storage modules in parallel chargings, ensure that the uniformity of 4 module charging effects, have employed again triggering mode in parallel simultaneously, the ON time of strict control 4 big current vacuum switches 6, and the synchronism of open pipe pipe conducting, in order to ensure to provide effective energy to conductive coil 91.
The plumb joint 9 that described workbench comprises stand 8 and is arranged on stand 8, described plumb joint 9 comprises conductive coil 91 and collection chinaware 92, and described conductive coil 91 is connected with each vacuum switch 6 in main frame by coaxial cable 7 simultaneously.During actual fabrication, described plumb joint 9 also comprises input end plate 93, exports end plate 94, collects chinaware plug 910, collects chinaware location top board 95 and interior pipe 11 positioning sleeve 96.
Described conductive coil 91 comprises 3 groups of coil-conductors, and conductive coil 91 is wherein designed to 4.5 circles, and the aluminum alloy materials adopting electric conductivity good makes.The two ends of described coil-conductor respectively with input end plate 93 with export end plate 94 and be connected, insulating barrier 97 is provided with between adjacent two circle coil-conductors, turn-to-turn insulation adopts epoxy resin board (thickness δ=2 ~ 3mm) to do and cut off, turn-to-turn connects employing copper plate, reduces induction reactance and the impedance of whole conductive coil 91 as far as possible.Be respectively arranged with an end insulation support plate 98 in the outside of input end plate 93 and output end plate 94, both ends insulation support plate 98 is connected as a whole by insulated high-strength connecting bolt 99; Input end plate 93 is connected respectively by the both positive and negative polarity of cable with the signal output part of impulse generator with output end plate 94.
Described collection chinaware 92 be positioned at conductive coil 91 and with conductive coil 91 coaxial inner conductor, a collection chinaware plug 910 is respectively equipped with at the two ends of collection chinaware 92, described collection chinaware plug 910 and collection chinaware 92 coaxial inner conductor, the side that described collection chinaware location top board 95 utilizes lock-screw 911 to be separately fixed at both ends insulation support plate 98 to deviate from mutually, thus collection chinaware plug 910 is pushed down, to lock the axial location of collection chinaware 92.
The middle part of described collection chinaware plug 910 axially offers a through hole along it, the small end of described interior pipe positioning sleeve 96 inserts in the through hole of right side collection chinaware plug 910, the outer face of collection chinaware plug 910 is close to by shoulder step, and right side collection chinaware location top board 95 is axially pushed down the large end face of interior pipe positioning sleeve 96 and fixes.
During welding, weldment outer tube 912 is inserted in collection chinaware 92 from the left end of plumb joint 9, and is close to the end of interior pipe positioning sleeve 96, prevent from moving right.Then, by the auxiliary jig positioning and locking of the exposed junction of weldment outer tube 912, prevent from being moved to the left.Again pipe in weldment 913 be inserted into welding position in the mesopore of interior pipe positioning sleeve 96 and prevent axial displacement (must insertion depth be controlled), making outer tube 912 be in the position to be welded of interior pipe 913 the inward flange step place collecting chinaware 92 simultaneously.
The utility model pools the very high electromagnetic beam of density to enable magnetic field energy, adds a kind of parts being called collection chinaware, enhance the magnetic energy density of welding position, improve welding effect between weldment and coil.This collection chinaware 92 adopts heat resistant copper alloy to make, and as shown in the figure, collection chinaware 92 main body be cylindric, and its two ends to medial recess, and have one along its axially setting and run through the through hole at main body two ends.Wherein, B is collection chinaware length (must be longer than coil), and b is required poly-magnetic width (and weld width), and D is collection chinaware external diameter (being about less than coil endoporus), and d is collection Ci device endoporus (being about greater than the external diameter of outer tube 912).
Collection chinaware also known as electromagnetic flux field concentrator, be realize electromagnetic pulse welding main frock, it have magnetic flux converge or move to collection chinaware inner hole wall and outer excircle of workpiece between gap in effect.In figure, I is coil current (being provided by pulse circuit), and i is the induced-current in collection chinaware, and iO is the induced-current in workpiece.Collection chinaware can change the distribution of magnetic track by changing inner wall shape, some space magnetic field is strengthened, the field weakening in other spaces, reach the object of adjustment welding position.By changing collection chinaware appearance and size and controlled discharge energy, can the pipe fitting of welding of different materials and wall thickness.
Make collection chinaware easier than coil processed, cost is lower.Same conductive coil 91 changes different collection chinawares, just can process the pipe of different size, this is more conducive to batch production.Collection chinaware is conducive to extension coil service life, controls the weld shape of workpiece, improves flexibility during electromagnetic pulse welding processing.
Can release out rapidly from Capacitor banks within the extremely short time in order to ensure the pulse current exported, in the output of impulse generator and the junction of conductive coil 91, have employed special coaxial wire as electric current transporting line, in order to overcome electric power, reduction system exports induction reactance and the current loss of cable, the electric current of output is fully used, and is effectively converted into electromagnetic energy.
Utilize said apparatus to carry out a welding method for copper pipe and Al pipe butt welding in refrigeration plant, it is characterized in that: comprise the steps:
1) first one end of outer tube 912 is inserted in collection chinaware 92 from plumb joint 9 away from one end of interior pipe positioning sleeve 96, again one end of interior pipe 913 is inserted the mesopore of collection chinaware 92 from one end of the fixing interior pipe positioning sleeve of plumb joint 9, and be inserted into (degree of depth of insertion is and needs lap-welded length) in the hole of outer tube 912, and between outer tube 912 and interior pipe 913, there is gap.
2) unbalanced pulse generator, makes each capacitor charging in Capacitor banks, and when charging voltage reaches setting value, Systematical control flip flop equipment 5 opens discharge switch 6, makes capacitor 4 repid discharge; Pulse current during welding at least will reach more than 400KA, realizes welding of outer tube 912 and interior pipe 913 by the magnetic force in collection chinaware 92.
In welding process, electric current flows through conductive coil 91(inductive load within the extremely short time) discharge, produce instantaneous pressure pulsed magnetic field, simultaneously also outer tube 912 Surface Creation induced-current and form a reverse impulse magnetic field, the huge inside radial forces of generation is repelled in two magnetic fields mutually, make outer tube 912 under the effect of high-intensity magnetic field power fiercely clash in pipe 913, when the process conditions such as impact velocity and angle are met, namely solder side forms interatomic metallurgical binding, realizes welding.
Utility model works principle is as follows: when alive conductor is placed in magnetic field, and this conductor will be subject to the effect of power, this electric current and magnetic field interaction and the power produced is called Lorentz force (Lorentz force).
Therefore, when electric current moves with different directions, two parallel energized conductors can repel mutually, and in fact the utility model is exactly a kind of method utilizing electromagnetic force to weld metal works.It utilizes Capacitor banks to spark, the welding that the electromagnetic energy that the big current i1 flowing through conductive coil C is formed is carried out as welding energy.
When there being current i 1 to flow through in coil C, the outer surface of the tubing T to be welded placed in coil will produce induced-current i2.The magnetic field H that i2 and i1 produces intersects vertically, and tubing produces directed force F in radial direction under the effect of H, and this power is exactly famous Maxwell's electromagnetic force.
F＝ μ
0 H
2
μ in formula
0be air permeability, increase because H increases with i, therefore F and i be directly proportional.When i is enough large, tubing T just with flank speed (> 300mm/s) to the inside tubing D collide, if impact velocity is large and collision angle is suitable, will produce metal jet at the point of impingement, namely welding surface is cleaned out by metal jet and is obtained close contact and realize welding.
energy needed for welding is stored in an impulse generator be made up of Capacitor banks, charhing unit and high-current switch.This impulse generator and electro-magnetic impulse coil constitute a resonance circuit, the ENERGY E=CV stored in Capacitor banks
2be converted to coil with magnetic force E=LI
2.
During welding, outer workpiece and solenoid all can be regarded as conductor, and when a solenoid coil is energized, outer surface of the work can produce induced-current, and this electric current also generates an electromagnetic field.According to Lenz's law, the magnetic field that solenoid produces is contrary with faradic magnetic direction, mutually repels.Therefore, the interaction in two magnetic fields produces powerful repulsive force, and this outer workpiece is subject to an inside radial load effect, is compressed in very short time towards direction of axis line.Under the effect of high pressure Reeb, outer workpiece is forced to clash into internal layer workpiece fiercely with very high speed and kinetic energy, the metallic atom of ectonexine workpiece is made to meet in interatomic distance and mutually extrude, form interatomic combination, and form new metallurgy layer at faying face, when process conditions meet, welding can be realized.
Finally it should be noted that, above embodiment is only in order to illustrate the technical solution of the utility model but not restriction technologies scheme, those of ordinary skill in the art is to be understood that, those are modified to the technical solution of the utility model or equivalent replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of right of the present utility model.
Claims (3)
1. the device for copper pipe in refrigeration plant and Al pipe butt welding, comprise main frame and workbench, it is characterized in that: described main frame comprises main box, be provided with the AC power of filter, transformer, high-voltage rectifier, capacitance group, vacuum switch and flip flop equipment in main box; Described AC power is connected with high-voltage rectifier after transformer transformation, and described high-voltage rectifier is connected with each electric capacity of capacitance group simultaneously, and each electric capacity of capacitance group is connected with a vacuum switch respectively; Described flip flop equipment comprises impulse generator, and the signal input part of this impulse generator is connected with AC power, and signal output part is connected with each vacuum switch simultaneously;
Described workbench comprises stand and is arranged on the plumb joint on stand, and described plumb joint comprises conductive coil and collection chinaware, and described conductive coil is connected with each vacuum switch in main frame by coaxial cable simultaneously.
2. the device for copper pipe in refrigeration plant and Al pipe butt welding according to claim 1, is characterized in that: described plumb joint also comprises input end plate, exports end plate, collection chinaware location plug, collection chinaware location top board and interior pipe positioning sleeve;
Described conductive coil comprises 3 groups of coil-conductors, the two ends of described coil-conductor respectively with input end plate with export end plate and be connected, insulating barrier is provided with between adjacent two circle coil-conductors, be respectively arranged with an end insulation support plate in the outside of input end plate and output end plate, both ends insulation support plate is connected as a whole by insulated high-strength connecting bolt; Input end plate is connected respectively by the both positive and negative polarity of cable with the signal output part of impulse generator with output end plate;
Described collection chinaware be positioned at conductive coil and with conductive coil coaxial inner conductor, a collection chinaware location plug is respectively equipped with at the two ends of collection chinaware, described collection chinaware location plug and collection chinaware coaxial inner conductor, the side that described collection chinaware location top board and interior pipe positioning sleeve utilize lock-screw to be separately fixed at both ends insulation support plate to deviate from mutually, thus collection chinaware location plug is pushed down, to lock the axial location of collection chinaware;
The middle part of described collection chinaware plug axially offers a through hole along it, the small end of described interior pipe positioning sleeve inserts in the through hole of right side collection chinaware plug, the outer face of collection chinaware plug is close to by shoulder step, and in the top board axial compression of right side collection chinaware location, the large end face of pipe positioning sleeve is also fixing.
3. the device for copper pipe in refrigeration plant and Al pipe butt welding according to claim 1, is characterized in that: described capacitance group comprises the storage capacitor of 4 5kJ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420435518.3U CN204094300U (en) | 2014-08-04 | 2014-08-04 | For the device of copper pipe in refrigeration plant and Al pipe butt welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420435518.3U CN204094300U (en) | 2014-08-04 | 2014-08-04 | For the device of copper pipe in refrigeration plant and Al pipe butt welding |
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| Publication Number | Publication Date |
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| CN204094300U true CN204094300U (en) | 2015-01-14 |
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|---|---|---|---|
| CN201420435518.3U Expired - Fee Related CN204094300U (en) | 2014-08-04 | 2014-08-04 | For the device of copper pipe in refrigeration plant and Al pipe butt welding |
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| CN (1) | CN204094300U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191081A (en) * | 2014-08-04 | 2014-12-10 | 重庆普尔萨科技有限公司 | Device used for welding copper tube and aluminum tube in refrigeration equipment and welding method thereof |
| CN107081513A (en) * | 2017-05-17 | 2017-08-22 | 重庆市光学机械研究所 | Multi-layer cell aluminium sheet ear, copper polar ear electromagnetic pulse welding method |
-
2014
- 2014-08-04 CN CN201420435518.3U patent/CN204094300U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191081A (en) * | 2014-08-04 | 2014-12-10 | 重庆普尔萨科技有限公司 | Device used for welding copper tube and aluminum tube in refrigeration equipment and welding method thereof |
| CN107081513A (en) * | 2017-05-17 | 2017-08-22 | 重庆市光学机械研究所 | Multi-layer cell aluminium sheet ear, copper polar ear electromagnetic pulse welding method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20180804 |