CN1245271C - Method for welding bearing band - Google Patents
Method for welding bearing band Download PDFInfo
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- CN1245271C CN1245271C CN 03114647 CN03114647A CN1245271C CN 1245271 C CN1245271 C CN 1245271C CN 03114647 CN03114647 CN 03114647 CN 03114647 A CN03114647 A CN 03114647A CN 1245271 C CN1245271 C CN 1245271C
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- bearing band
- projectile
- welding
- belt
- magnetic coil
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- Pressure Welding/Diffusion-Bonding (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The present invention discloses a method for welding a projectile belt, which is characterized in that a projectile belt (2) is sheathed on a projectile body (1); a magnetic coil (3) is arranged outside the projectile belt (2); the projectile body (1) is arranged in a welding clamp, tightly pressed and fixed by a clamping screw (9); a mechanical discharge switch (6) is switched on, and electrical energy stored in a condenser block (7) is discharged to the magnetic coil (3) which is sheathed outside the projectile belt (2); by means of the interaction between momentary strong current i1 of the magnetic coil (3) and a vortex flow i2 sensed by the projectile belt (2), the projectile belt (2) generates strong electromagnetic impact force in the circumferential direction to generate an elastic deformation so as to be welded together with the projectile body (1). The heating time of discharge pulses in the vortex flow i2 sensed by the projectile belt (2) in the welding process is smaller than 0.2 second; therefore, the metallographic structure of a welding position of the projectile body (1) can not change, the intensity and the hardness of the projectile body (1) can not decline, and the binding strength of a weld seam is high. The method has the advantages of convenient operation and easy realization of automation.
Description
Technical field
The magneticetic pulse welding that the present invention relates to a kind of welding method of bearing band, particularly bearing band connects method.
Background technology
Bearing band is the red copper annulus in the certain position welding of shell body.The internal diameter of bearing band and the external diameter of body are basic identical, and its wall thickness is about 2～4mm.At present, the welding method of bearing band mainly is deposited diffusion welding method and friction welding method both at home and abroad.
Document " Arms Material scientific and engineering ", " the deposited Diffusion Welding technical research of bearing band " of Vol.25.No.2.2002 Wang Ke letter etc. introduced the deposited diffusion welding method of bearing band.This method makes its fusing by eddy-current heating or plasma heating bearing band, does not heat body, thereby makes bearing band and body generation metallurgical binding and form firm joint.
Document " metal forming technology ", Vol.20.No.3.2002 Wang Yan etc. " bearing band radial friction solder technology " introduced the friction welding method of bearing band.This method is by the welding of the high speed rotary grinding between bearing band and body bearing band.
Though deposited diffusion welding method can make the bearing band welding point solid and reliable, but since this welding process to the bearing band heating-up temperature up to more than 1000 ℃, and heat time heating time reach more than 1 minute, bigger to solder side body one side metal structure influence, cause intensity, hardness to descend.Fig. 4 is the metallograph of Russian deposited welding bearing band, the column crystal that produces when figure can obviously find out the ferrite of growing up and pearlitic structrure and copper crystallization.
In the friction welding method, bearing band and body can only be realized welding in 3 zones of pressurization, can't solve the even pressurization problem in one week of bearing band upset stage, so bearing band and body bond strength are undesirable, therefore can't drop into batch process so far.
Stress during the shell emission requires the weld seam of bearing band to have enough bond strengths, therefore, can not make body produce fusing when welding, and intensity, hardness are descended.Therefore, be necessary to seek to lack a kind of heat time heating time, do not destroy the bearing band welding method of body institutional framework.
Summary of the invention
In order to overcome the long deficiencies such as the weld strength that causes is not high, operation inconvenience that wait heat time heating time in the prior art, the invention provides a kind of welding method of bearing band---magneticetic pulse welding welding bearing band, this welding method is in welding process, and heat time heating time is short, the weld strength height can be produced in batches.
Technical scheme of the present invention is: bearing band 2 is enclosed within on the body 1, and magnetic coil 3 places the outside of bearing band 2, body 1 is placed in the weld jig 4 compress, and fixing with pinching screw 9; Closed mechanical type discharge switch 6 is stored in magnetic coil 3 discharges of electric energy outside being enclosed within bearing band 2 in the capacitor group 7, by the moment heavy current i of magnetic coil 3
1Eddy current i with induction on the bearing band 2
2Interact, make bearing band 2 produce powerful electromagnetic force and produce plastic deformation, finish welding with body 1 at circumferencial direction.
The charging voltage of capacitor group 7 should be more than 400V, and energy stored should be above 20,000 joules on it; The impedance of discharge loop should be controlled between 10～20m Ω; Guarantee maximum discharge current at 2～60,000 A, electromagnetic force is more than 400MPa.
The present invention's advantage compared to existing technology is, because heat time heating time short (discharge pulse in bearing band 2, respond to eddy current i2 heat time heating time less than 0.2S) in the welding process, so the welding position metallographic structure of body can not change, body intensity and hardness can not descend, so the bond strength height of weld seam; Weld interval is short, easy to operate, realizes automation easily, can obviously enhance productivity.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a device schematic diagram of the present invention
Fig. 2 is the circuit block diagram of embodiment
Fig. 3 is the welding sense of current schematic diagram of moment
Fig. 4 is the metallograph (* 200) of Russian deposited welding bearing band, is background technology figure
1-body among the figure, 2-bearing band, 3-magnetic coil, 4-anchor clamps, 5-work top, 6-mechanical type discharge switch, 7-capacitor group, the 8-bus that discharges, 9-pinching screw, 10-charge switch, 11-three-phase half controlled bridge formula rectification circuit.
The specific embodiment
With reference to Fig. 1, bearing band 2 is enclosed within on the body 1, magnetic coil 3 places the outside of bearing band 2, body 1 is placed in the weld jig 4 compress, and fixing with pinching screw 9.Closed mechanical type discharge switch 6 is stored in magnetic coil 3 discharges of electric energy outside being enclosed within bearing band 2 in the capacitor group 7, by the moment heavy current i of magnetic coil 3
1Eddy current i with induction on the bearing band 2
2Interact, make bearing band 2 produce powerful electromagnetic force and produce plastic deformation at circumferencial direction, and the oxide-film on the destruction and the seam face of removing, form firm solid-phase joint, finish welding with body 1.
With reference to Fig. 2, it is as follows that the present invention discharges and recharges operating process:
Give three-phase half controlled bridge formula rectification circuit 11 energisings, make its output dc voltage, and charge to capacitor group 7 by resistance R.When charging reached setting value Uce, three-phase half controlled bridge formula rectification circuit 11 automatically shut down, and charging process finishes.
The closed mechanical type discharge switch 6 that is composed in parallel by 9 pairs of big contactor contacts, capacitor group 7 is by magnetic coil 3 repid discharges, the eddy current i that discharge pulse is responded in bearing band 2
2Heat time heating time is less than 0.2S.
The charging voltage of capacitor group 7 should be more than 400V, and energy stored should be above 20,000 joules on it.The impedance of discharge loop should be controlled between 10～20m Ω.Can obtain the maximum discharge current of 2～60,000 A like this, produce the above electromagnetic pressure of 400MPa.
Claims (2)
1, a kind of welding method of bearing band is characterized in that: bearing band (2) is enclosed within on the body (1), and magnetic coil (3) places the outside of bearing band (2), body (1) is placed in the weld jig (4) compress, and fixing with pinching screw (9); Closed mechanical type discharge switch (6) is stored in magnetic coil (3) discharge of electric energy outside being enclosed within bearing band (2) in the capacitor group (7), by the moment heavy current i of magnetic coil (3)
1Go up the eddy current i of induction with bearing band (2)
2Interact, make bearing band (2) produce powerful electromagnetic force and produce plastic deformation, finish welding with body (1) at circumferencial direction.
2, the welding method of bearing band according to claim 1 is characterized in that: the charging voltage of capacitor group (7) should be more than 400V, and energy stored should surpass 20,000 J on it; The impedance of discharge loop should be controlled between 10～20m Ω; Guarantee maximum discharge current at 2～60,000 A, electromagnetic force is more than 400MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03114647 CN1245271C (en) | 2003-04-17 | 2003-04-17 | Method for welding bearing band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03114647 CN1245271C (en) | 2003-04-17 | 2003-04-17 | Method for welding bearing band |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1451507A CN1451507A (en) | 2003-10-29 |
| CN1245271C true CN1245271C (en) | 2006-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03114647 Expired - Fee Related CN1245271C (en) | 2003-04-17 | 2003-04-17 | Method for welding bearing band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1245271C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100358665C (en) * | 2006-03-06 | 2008-01-02 | 哈尔滨工业大学 | Method for welding shell belt by argon arc build-up welding with different copper double wires |
| CN102133673B (en) * | 2009-03-26 | 2013-04-17 | 哈尔滨工业大学 | TIG (Tungsten Inert Gas) automatic surfacing method for projectile copper alloy conduction band |
| CN103480953B (en) * | 2013-09-16 | 2016-01-20 | 哈尔滨工业大学 | A kind of soft iron, copper composite belt structure and welding method thereof |
| CN105798452A (en) * | 2016-05-23 | 2016-07-27 | 哈尔滨万洲焊接技术有限公司 | Method for preparing copper cartridge belt in self-propagating manner with assistance of supersonic vibration |
| CN105772936B (en) * | 2016-05-23 | 2018-03-27 | 哈尔滨万洲焊接技术有限公司 | A kind of method that copper bearing band is prepared using agitating friction weldering |
-
2003
- 2003-04-17 CN CN 03114647 patent/CN1245271C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1451507A (en) | 2003-10-29 |
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Granted publication date: 20060315 |