CN203820878U - Laser re-melting device for bearing bush - Google Patents
Laser re-melting device for bearing bush Download PDFInfo
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- CN203820878U CN203820878U CN201420227723.0U CN201420227723U CN203820878U CN 203820878 U CN203820878 U CN 203820878U CN 201420227723 U CN201420227723 U CN 201420227723U CN 203820878 U CN203820878 U CN 203820878U
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- bearing shell
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Abstract
Alaser re-melting device for a bearing bush comprises a rotary workbench, wherein a chuck is arranged on the rotary workbench; a sleeve is mounted on the chuck; an inner cavity for mounting the bearing bush is formed in the sleeve; a steel positioning ring is arranged on the inner cavity; one end of the sleeve is closed and clamped on the chuck, and a sealing end cover is arranged at the other end of the sleeve; a rotatable rubber folded sleeve which can expand and retract inwards and outwards is arranged in a central hole of the sealing end cover. After centrifugal casting of Babbitt metal is performed on the bearing bush, a laser re-melting technology is used for improving the structure and the performance of thecentrifugally cast Babbitt metal. Quick scanning is performed on the surface of the centrifugally cast Babbitt metal by the aid of a high-energy laser beam, and the irradiatedBabbitt metal surface layer absorbs energy of the laser and is quickly molten to form a liquid molten pool. When the laser beam is removed, heat is dissipated quickly through conduction of a base body, and theliquid molten pool is solidifiedquickly. Through laser re-melting, coarse compounds of the centrifugally cast Babbitt metal are eliminated, and air holes are eliminated, so thattheBabbitt metal is denser; meanwhile, crystal grains are thinned due to quick cooling.
Description
Technical field
The utility model relates to technical field of bearings, especially a kind of laser remolten device for opposite opened radial sliding bearing bearing shell.
Background technology
At present, sliding surface bearing because of its compact construction, the characteristic such as supporting capacity is strong, shock resistance good, running accuracy is high, stable working, noise are little, long service life, be widely used in high speed, heavy duty, high precision, powerful equipment, the key part of the equipments such as steam turbine, water turbine, nuclear power generating sets, generator, large and medium motor, motor car engine, nuclear-propelled submarine, warship, large ship, industrial pump, gas blower, compressor, rolling mill, wheel casing, coal pulverizer, to guaranteeing that the normal safe handling of main equipment plays vital effect.Take opposite opened radial sliding bearing as example, and its structure mainly contains step cover, bearing shell, bearing base etc.Its intermediate bushing directly be coupling tactilely, during work, bear larger extruding and friction, often there is abrasive wear, scratch, gummed, fatigue flake and corrosive wear equivalent damage.The damage of bearing shell can affect the operation of sliding surface bearing, causes extra cost payout and the increase of maintenance service, extends improper stop time.For ensureing stable, the safety of sliding surface bearing operation, require the frictional coefficient of bearing shell and abrasion loss little.Bush material adopts Babbitt metal, copper alloy, grey cast iron and non-metallic material etc. conventionally, wherein most widely used with Babbitt alloy material especially.Particularly, for those bearing shells that batch is little, size is large, conventionally adopt rotational casting technique, Babbitt metal is cast in to the internal surface of bearing shell steel backing, form babbitt layer, make bi-metal shaft bushing.
Can bearing shell normally work for a long time, closely related with the casting quality of Babbitt metal.In rotational casting process, element in Babbitt metal can produce along with the raising of centrifuge speed segregation, copper can be assembled to steel backing direction, antimony element can occupy more composition away from the one side of steel backing, maximum segregation can reach more than 50%, the element of Babbitt metal itself is distributed the variation of essence has occurred, cause thus the decline of the use properties of sliding surface bearing.In addition, if Babbitt metal is excess Temperature when rotational casting, in alloy, there is impurity, watt tire does not wash clean clearly, the rear speed of cooling control of casting is bad etc., the defects such as Babbitt metal compound is thick, slag inclusion, pore, crackle, tread flaking be will cause, the antifatigue of sliding surface bearing, the performance such as corrosion-resistant and wear-resistant affected.
Utility model content
The utility model will solve the shortcoming of above-mentioned prior art, and a kind of bearing shell laser remolten device is provided, and can improve tissue and the performance of rotational casting Babbitt metal.
The utility model solves the technical scheme that its technical problem adopts: this bearing shell laser remolten device, comprise rotary table, rotary table is provided with chuck, sleeve is installed on chuck, in sleeve, be provided with the inner chamber that bearing shell is installed, inner chamber is provided with location steel ring, and sleeve one end is sealed and be connected on chuck, the sleeve the other end is provided with end cover, the centre hole of end cover be provided with can in the rubber fold cover of external extension and rotation.After bearing shell rotational casting Babbitt metal, adopt laser remolten technique, to improve tissue and the performance of rotational casting Babbitt metal.Adopt high energy laser beam to do rapid scanning on rotational casting Babbitt metal surface, the energy of the Babbitt metal top layer absorbing laser being irradiated onto, fusing forms liquid molten bath rapidly.After laser beam is removed, heat loses rapidly by the conduction of matrix, and solidify rapidly in liquid molten bath.Laser remolten has been eliminated the coarsening compound of rotational casting Babbitt metal, eliminates pore, makes Babbitt metal finer and close, simultaneously because the rapid cooling crystal grain that makes obtains refinement.Because cooling time is extremely short, element has little time segregation, and element distributes very evenly, and has eliminated segregation, can greatly improve the performance of Babbitt metal.
For further perfect, in rubber fold cover, penetrate laser transmission apparatus, the inner of rubber fold cover is sealedly connected on the centre hole of end cover, and the outer end of rubber fold cover is provided with the trim ring being enclosed within on laser transmission apparatus outside surface.Make like this rubber fold cover coordinate with laser transmission apparatus tightr, better tightness.
Laser transmission apparatus comprises laser focusing camera lens and nozzle, laser focusing camera lens is connected with the horizontal adjustment sleeve pipe coaxial with it, horizontal adjustment sleeve pipe right-hand member is provided with laser reflection camera lens and is vertical vertical adjusting sleeve pipe with it, and trim ring is enclosed within on horizontal adjustment bushing outer surface; Laser focusing camera lens and laser reflection camera lens are equipped with water-in and water outlet.The reasonable in design of laser transmission apparatus, can interior external extension and altitude mixture control.
End cover is provided with into water interface and water outlet mouthpiece, and water inlet interface, water outlet mouthpiece connect respectively water-in and the water outlet of laser focusing camera lens by conduit.Like this laser focusing camera lens is cooled.
Sleeve is provided with intake interface and weather gauge.Can be filled with shielding gas like this, prevent from being oxidized when laser remolten.
On the inwall of inner chamber, have air channel, air channel one end is connecting intake interface, and the other end connects end cover.The shielding gas that air channel guiding intake interface enters like this, makes shielding gas be full of whole inner chamber.
The effect that the utility model is useful is: the laser remolten device that the utility model provides has solved Babbitt metal oxidation and overheated key issue, makes its laser remolten become possibility.Babbitt metal fusing point is low, contacts be very easily oxidized, burn with oxygen.Laser remolten device of the present utility model has built an inert gas environment in sleeve, rare gas element enters sleeve from sleeve intake interface, along air channel, be full of whole sleeve, then from nozzle, flow into laser transmission apparatus, from laser transmission apparatus top, flow out.Laser remolten device of the present utility model is building inert gas environment, does not affect the motion of laser transmission apparatus when preventing Babbitt metal oxidation, scaling loss.In laser re-melting process, the heat of laser beam is absorbed by Babbitt metal, and the heat part discharging after Babbitt metal solidifies, by the convective heat exchange of rare gas element, is absorbed by rare gas element, by mobile sleeve and the laser transmission apparatus taken out of of rare gas element; Another part heat is absorbed by steel backing by conduction, and is conducted to sleeve and lost by steel backing, thereby overheated while having avoided making Babbitt metal remelting because of accumulation of heat.
Accompanying drawing explanation
Fig. 1 is the front view of laser remolten device in the utility model;
Fig. 2 is the perspective view of laser remolten device in the utility model;
Fig. 3 is the enlarged diagram of A part in Fig. 2;
Fig. 4 is the internal structure schematic diagram of the utility model middle sleeve;
Fig. 5 is the internal view of laser aid in the utility model.
Description of reference numerals: conduit 1, intake interface 2, weather gauge 3, rotary table 4, chuck 5, sleeve 6, inner chamber 6-1, air channel 6-2, location steel ring 7, end cover 8, water-in 8-1, water outlet 8-2, rubber fold cover 9, laser aid 10, laser focusing camera lens 10-1, nozzle 10-2, horizontal adjustment sleeve pipe 10-3, laser reflection camera lens 10-4, vertically adjusting sleeve pipe 10-5, water-in 10-6, water outlet 10-7, trim ring 11.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
With reference to accompanying drawing: this bearing shell laser remolten device, comprise rotary table 4, rotary table 4 is provided with chuck 5, sleeve 6 is installed on chuck 5, in sleeve 6, be provided with the inner chamber 6-1 that bearing shell is installed, inner chamber 6-1 is provided with location steel ring 7, sleeve 6 one end are sealed and are connected on chuck 5, sleeve 6 the other ends are provided with end cover 8, the centre hole of end cover 8 be provided with can in the rubber fold cover 9 of external extension and rotation, in rubber fold cover 9, penetrate laser transmission apparatus 10, the inner of rubber fold cover 9 is sealedly connected on the centre hole of end cover 8, the outer end of rubber fold cover 9 is provided with the trim ring 11 being enclosed within on laser transmission apparatus 10 outside surfaces, sleeve 6 is provided with intake interface 2 and weather gauge 3, laser transmission apparatus 10 comprises laser focusing camera lens 10-1 and nozzle 10-2, laser focusing camera lens 10-1 is connected with the horizontal adjustment sleeve pipe 10-3 coaxial with it, horizontal adjustment sleeve pipe 10-3 right-hand member is provided with laser reflection camera lens 10-4 and is vertical vertical adjusting sleeve pipe 10-5 with it, and trim ring 11 is enclosed within on horizontal adjustment sleeve pipe 10-3 outside surface, laser focusing camera lens 10-1 and laser reflection camera lens 10-4 are equipped with water-in 10-6 and water outlet 10-7, end cover 8 is provided with into water interface 8-1 and water outlet mouthpiece 8-2, the inner of water inlet interface 8-1, water outlet mouthpiece 8-2 connects respectively water-in 10-6 and the water outlet 10-7 of laser focusing camera lens 10-1 by conduit 1, water inlet interface 8-1 and water outlet mouthpiece 8-2 outer end are connected with cooling-water machine.On the inwall of inner chamber 6-1, have air channel 6-2, air channel 6-2 one end is connecting intake interface 2, and the other end connects end cover 8.
When carrying out laser remolten, laser beam parallel through irradiation after vertical adjusting sleeve pipe 10-5 on laser mirror 10-4, be reflected mirror reflection, there are 90 degree and change in transmission direction.Subsequently, laser beam is parallel through horizontal adjustment sleeve 10-3, irradiation is to laser focusing camera lens 10-1, through secondary reflection again, focus on after, irradiation, on the inwall of bearing shell Babbitt metal, forms molten bath, after laser beam is removed, heat scatters and disappears rapidly by bearing shell matrix, and the Babbitt metal of fusing solidifies rapidly.
Bearing shell is fixed in bearing shell sleeve 6, together moves with bearing shell sleeve 6.Sleeve 6 is fixed on by chuck 5 on the chuck 5 of vertical rotating worktable 4, with chuck 5 motions.When carrying out laser remolten, the moment that laser optical shutter is opened, bearing shell 1 is with bearing shell sleeve 6 high speed rotating under the drive of chuck 5, in the rotary course of bearing shell and sleeve, laser optical shutter is opened all the time, when laser remolten starts, along with the carrying out of remelting, laser power reduces gradually, and it is overheated to prevent.Laser beam is focused to rectangular light spot irradiation on Babbitt metal surface, after turning over one week, laser optical shutter moment closes, chuck 5 is toward going back to one week on the contrary, and laser head level under the drive of numerically-controlled machine moves right a width of light beam, and chuck starts to rotate again subsequently, laser optical shutter moment unlatching, carry out laser remolten, repeat said process, finally realize the surface laser remelting of a plurality of plain bearing bush.
The heating and cooling speed of the utility model laser remolten is exceedingly fast, and the refinement greatly of bearing shell carbide and crystal grain, does not exist microstructure segregation, eliminates the defects such as pore, has higher intensity, hardness, fatigue resistance and wear resistance, is conducive to improve the work-ing life of bearing shell.
By lock screw, bearing shell 1 is fixing with location steel ring 7, bearing shell sleeve 6 is fixed on vertical rotating worktable 4 by chuck 5.Laser aid 10 is penetrated to rubber fold cover 9, fixed and sealed laser transmission apparatus 10 is installed by trim ring 11, laser transmission apparatus 10 stretches into the bottom of bearing shell sleeve 6.Laser transmission apparatus 10 tops are connected with numerically-controlled machine by laser head upper sleeve screw thread.End cover 8 is connected to and is prevented gas leakage by trim ring 11 and screw with rubber fold cover 9, can gluing.Rubber fold cover 9 is connected to and prevents from leaking gas with laser transmission apparatus 10 by trim ring 11 and screw, can gluing.Rubber fold cover 9 can be done horizontal direction to-and-fro movement with laser head integral body, also can be along clockwise and counterclockwise turn round and circle.End cover 8 is provided with into water interface 8-1 and water outlet mouthpiece 8-2, and the inner of water inlet interface 8-1, water outlet mouthpiece 8-2 connects respectively water-in 10-6 and the water outlet 10-7 of laser focusing camera lens 10-1 by conduit, and outer end connects cooling-water machine by conduit.Subsequently, by end cover 8 use bolts and bearing shell sleeve 6 wall lock jails, between end cover 8 and bearing shell sleeve 6, by sealing-ring, seal, strengthen like this stopping property.On bearing sleeve 6 tops, load onto weather gauge 3, the air pressure in Real-Time Monitoring bearing shell sleeve.
Before laser remolten, with plastic catheter is offered the valve of giving vent to anger that the gas cylinder of rare gas element helium, argon gas is housed intake interface 2 with bearing shell sleeve 6 bottoms, be connected.During laser remolten, by the valve open of giving vent to anger of gas cylinder, high pressure gas enter sleeve 6 by plastic catheter from intake interface 2, in sleeve 6 bottoms, also have air channel 6-2, guarantee that gas is uniformly distributed in whole bearing sleeve.The Real-Time Monitoring air pressure of observing weather gauge 3, when air pressure is excessive, reduces gas cylinder air outlet airflow rate or closed gas flow.Otherwise, when air pressure is too small, increase airflow rate.Rare gas element enters sleeve from sleeve intake interface 2, along air channel 6-2, be full of whole sleeve, then from nozzle 10-2, flow into laser transmission apparatus 10, from laser transmission apparatus top, flow out, thereby form an inert gas environment, prevent that Babbitt metal from oxidation and scaling loss occurring when laser remolten.
Before laser remolten, first weave numerical control program.By laser aid 10 irradiation at bearing shell Babbitt metal rotational casting internal surface.The moment of opening at laser optical shutter, bearing shell 1 is with bearing shell sleeve 6 high speed rotating under the drive of chuck 5.After turning over one week, laser optical shutter moment closes, chuck 5 is toward going back to one week on the contrary, laser head level under the drive of numerically-controlled machine moves right a width of light beam, chuck starts to rotate again subsequently, and laser optical shutter moment unlatching, carries out laser remolten, repeat said process, finally realize the surface laser remelting of a plurality of plain bearing bush.After bearing shell laser remolten is complete, close laser optical shutter, close the gas cylinder valve of giving vent to anger, close cooling-water machine water inlet valve and outlet valve.End cover 8 retaining screws are back-outed, and laser aid 10 moves down out bearing shell sleeve 6 in the drive of numerically-controlled machine, unclamps the lock screw on the steel ring 7 of location, and bearing shell 1 is taken out from bearing shell sleeve 6, reinstalls new rotational casting bearing shell, proceeds laser remolten.Bearing shell after the laser remolten taking off carries out the precision work such as a little follow-up car of surface, milling, reaches dimensional requirement.
Although the utility model illustrates and describes by reference to preferred embodiment,, those skilled in the art should understand, and in the scope of claims, can do the various variation in form and details.
Claims (6)
1. a bearing shell laser remolten device, comprise rotary table (4), it is characterized in that: described rotary table (4) is provided with chuck (5), sleeve (6) is installed on chuck (5), in sleeve (6), be provided with the inner chamber (6-1) that bearing shell is installed, inner chamber (6-1) is provided with location steel ring (7), sleeve (6) one end is sealed and is connected on chuck (5), sleeve (6) the other end is provided with end cover (8), the centre hole of end cover (8) be provided with can in the rubber fold cover (9) of external extension and rotation.
2. bearing shell laser remolten device according to claim 1, it is characterized in that: in described rubber fold cover (9), penetrate laser transmission apparatus (10), the inner of rubber fold cover (9) is sealedly connected on the centre hole of end cover (8), and the outer end of rubber fold cover (9) is provided with the trim ring (11) being enclosed within on laser transmission apparatus (10) outside surface.
3. bearing shell laser remolten device according to claim 2, it is characterized in that: described laser transmission apparatus (10) comprises laser focusing camera lens (10-1) and nozzle (10-2), laser focusing camera lens (10-1) is connected with the horizontal adjustment sleeve pipe (10-3) coaxial with it, horizontal adjustment sleeve pipe (10-3) right-hand member is provided with laser reflection camera lens (10-4) and is vertical vertical adjusting sleeve pipe (10-5) with it, and described trim ring (11) is enclosed within on horizontal adjustment sleeve pipe (10-3) outside surface; Described laser focusing camera lens (10-1) and laser reflection camera lens (10-4) are equipped with water-in (10-6) and water outlet (10-7).
4. bearing shell laser remolten device according to claim 3, it is characterized in that: described end cover (8) is provided with into water interface (8-1) and water outlet mouthpiece (8-2), water inlet interface (8-1), water outlet mouthpiece (8-2) connect respectively water-in (10-6) and the water outlet (10-7) of laser focusing camera lens (10-1) by conduit (1).
5. bearing shell laser remolten device according to claim 1, is characterized in that: described sleeve (6) is provided with intake interface (2) and weather gauge (3).
6. bearing shell laser remolten device according to claim 1, is characterized in that: on the inwall of described inner chamber (6-1), have air channel (6-2), air channel (6-2) one end is connecting intake interface (2), and the other end connects end cover (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420227723.0U CN203820878U (en) | 2014-05-06 | 2014-05-06 | Laser re-melting device for bearing bush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420227723.0U CN203820878U (en) | 2014-05-06 | 2014-05-06 | Laser re-melting device for bearing bush |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203820878U true CN203820878U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420227723.0U Expired - Fee Related CN203820878U (en) | 2014-05-06 | 2014-05-06 | Laser re-melting device for bearing bush |
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| Country | Link |
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| CN (1) | CN203820878U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949614A (en) * | 2014-05-06 | 2014-07-30 | 浙江机电职业技术学院 | Oppositely-open-type radial bearing bush product, and fabrication method and laser re-melting device thereof |
| CN107217257A (en) * | 2017-08-04 | 2017-09-29 | 苏州大学 | Laser cladding apparatus |
| CN107460478A (en) * | 2017-08-04 | 2017-12-12 | 苏州大学 | Laser cladding apparatus |
| CN108453344A (en) * | 2018-04-28 | 2018-08-28 | 河北工业大学 | A kind of device and method to circular ring work piece outer round surface re melting process |
-
2014
- 2014-05-06 CN CN201420227723.0U patent/CN203820878U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949614A (en) * | 2014-05-06 | 2014-07-30 | 浙江机电职业技术学院 | Oppositely-open-type radial bearing bush product, and fabrication method and laser re-melting device thereof |
| CN103949614B (en) * | 2014-05-06 | 2015-12-30 | 浙江机电职业技术学院 | The preparation method of the radial bearing shell product of opposite opened |
| CN107217257A (en) * | 2017-08-04 | 2017-09-29 | 苏州大学 | Laser cladding apparatus |
| CN107460478A (en) * | 2017-08-04 | 2017-12-12 | 苏州大学 | Laser cladding apparatus |
| CN107217257B (en) * | 2017-08-04 | 2023-05-26 | 苏州大学 | Laser cladding device |
| CN107460478B (en) * | 2017-08-04 | 2023-05-26 | 苏州大学 | Laser cladding device |
| CN108453344A (en) * | 2018-04-28 | 2018-08-28 | 河北工业大学 | A kind of device and method to circular ring work piece outer round surface re melting process |
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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: 20140910 Termination date: 20200506 |