KR20170009072A - Method of manufacturing thrust bearing of vehicle turbocharger using electric discharge machining - Google Patents

Method of manufacturing thrust bearing of vehicle turbocharger using electric discharge machining Download PDF

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Publication number
KR20170009072A
KR20170009072A KR1020150100483A KR20150100483A KR20170009072A KR 20170009072 A KR20170009072 A KR 20170009072A KR 1020150100483 A KR1020150100483 A KR 1020150100483A KR 20150100483 A KR20150100483 A KR 20150100483A KR 20170009072 A KR20170009072 A KR 20170009072A
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KR
South Korea
Prior art keywords
thrust bearing
manufacturing
discharge machining
electric discharge
electrode
Prior art date
Application number
KR1020150100483A
Other languages
Korean (ko)
Inventor
이길범
Original Assignee
현대위아 주식회사
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Filing date
Publication date
Application filed by 현대위아 주식회사 filed Critical 현대위아 주식회사
Priority to KR1020150100483A priority Critical patent/KR20170009072A/en
Publication of KR20170009072A publication Critical patent/KR20170009072A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/14—Special methods of manufacture; Running-in
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
    • B23H1/04—Electrodes specially adapted therefor or their manufacture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/04—Sliding-contact bearings for exclusively rotary movement for axial load only
    • F16C17/047—Sliding-contact bearings for exclusively rotary movement for axial load only with fixed wedges to generate hydrodynamic pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
    • F16C33/1075—Wedges, e.g. ramps or lobes, for generating pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H2200/00—Specific machining processes or workpieces
    • B23H2200/10—Specific machining processes or workpieces for making bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/60—Shaping by removing material, e.g. machining
    • F16C2220/68—Shaping by removing material, e.g. machining by electrical discharge or electrochemical machining
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/23—Gas turbine engines
    • F16C2360/24—Turbochargers

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Combustion & Propulsion (AREA)
  • Sliding-Contact Bearings (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

The present invention relates to a method of manufacturing a thrust bearing, and more particularly, to a method of manufacturing a thrust bearing of a vehicle turbocharger by machining a frictional surface through electrical discharge machining to improve the precision of the frictional surface, The present invention relates to a method of manufacturing a stub bearing.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a thrust bearing for a vehicle turbocharger,

The present invention relates to a method of manufacturing a thrust bearing, and more particularly, to a method of manufacturing a thrust bearing of a vehicle turbocharger by machining a frictional surface through electrical discharge machining to improve the precision of the frictional surface, The present invention relates to a method of manufacturing a stub bearing.

Turbocharger is a device for turning the turbine by using the exhaust gas pressure of the engine and then pushing the sucked air to a pressure higher than atmospheric pressure by using this torque to increase the output of the engine.

1 is a general turbocharger for a vehicle. Referring to FIG. 1, a general turbocharger 10 for a vehicle includes a housing (not shown) having an exhaust channel through which exhaust gas is sucked and discharged and an intake channel through which external air is sucked, 11), a turbine (12) rotating by the exhaust flowing into the exhaust channel and compressing the intake air.

In addition, when the shaft of the turbine 12 is rotated, a load is applied in a direction parallel to the rotation axis and in a direction perpendicular to the rotation axis. Thrust applied in a direction parallel to the rotation axis is supported by a thrust bearing 13, The load applied perpendicularly to the rotary shaft is supported by the radial bearing 14. [

The thrust bearing 13 has a plurality of friction surfaces 13a and an oil groove 13b through which lubricating oil can flow is provided between the friction surfaces 13a.

The friction surface 13a also has a flat plane a and an inclined plane b extending obliquely from the plane a. The inclined plane b is generally processed by press working or machining.

However, there is a problem that press processing requires a great deal of cost in manufacturing a mold. In machining, machining cost can be reduced, but machining time is long and the cutting surface is not smooth.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method of manufacturing a thrust bearing capable of reducing the manufacturing cost while improving the production speed and frictional surface precision of a thrust bearing .

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a method of manufacturing an electrode for a discharge turbocharger, Preparing a thrust bearing manufacturing pad; And discharging the pad to the electrode for electric discharge machining to form the frictional surface, thereby manufacturing a thrust bearing.

In a preferred embodiment, the friction surface has an inclined surface inclined at a predetermined height.

In a preferred embodiment, the height of the inclined surface is a specific height of between 30 μm and 40 μm.

In a preferred embodiment, an oil groove is formed at the rim surface of the thrust bearing, and the electrode for electric discharge machining is embossed and prepared in a shape corresponding to the rubbing surface and the oil groove.

The present invention further provides a thrust bearing of a turbocharger for a vehicle manufactured by the thrust bearing manufacturing method.

The present invention has the following excellent effects.

According to the method for manufacturing a thrust bearing of the present invention, the production speed can be improved by machining the friction surface of the thrust bearing using the electric discharge machining, and the precision of the friction surface can be improved to realize the high quality of the bearing.

Further, according to the method for manufacturing a thrust bearing of the present invention, manufacturing cost can be reduced as compared with press working, and it is possible to flexibly cope with the shape change of the electrode for electric discharge machining.

1 is a view for explaining a general turbocharger for a vehicle,
2 is a view for explaining a method of manufacturing a thrust bearing according to an embodiment of the present invention.

Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.

Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.

2 is a view for explaining a method of manufacturing a thrust bearing according to an embodiment of the present invention.

Referring to FIG. 2, a method of manufacturing a thrust bearing according to an embodiment of the present invention is a method of manufacturing a thrust bearing of a turbocharger for a vehicle using discharge machining instead of press machining or machining .

First, the electrode for electric discharge machining 100 is prepared (S1000).

The electrode for electric discharge machining (100) is an electrode having a machined surface (110) which is anodically processed in a shape corresponding to the friction surface (13a) of a thrust bearing.

That is, the electrode for electric discharge machining 100 has a plane a 'and an inclined plane b' that are anodically processed corresponding to the plane a and the sloped plane b of the friction surface 13a shown in Fig.

In addition, the electrode for electric discharge machining 100 has a plurality of machining planes 110 dmf located radially.

The inclined surface b 'is inclined at a predetermined height h, and the height h is preferably a specific height between 30 μm and 40 μm.

That is, since the slope of the inclined surface b 'is very small, it has been difficult to process a precise friction surface through press working or machining.

In addition, the plurality of machining planes 110 formed on the electrode for electric discharge machining 100 have the same inclination of the inclined surfaces b '.

However, depending on the design of the designer, the inclined surfaces b 'of the machined surfaces 110 may have different slopes from each other.

Although not shown, a machined surface having a shape corresponding to the oil groove 13b shown in Fig. 1 can be anodized at the edge of the machined surface 110. [

In other words, the machined surface 110 may be anodically treated so that the friction surface of the thrust bearing and the oil groove are machined together.

In addition, the electrode for electric discharge machining (100) is used as a negative electrode, and can be made of copper, brass or graphite.

Next, the thrust bearing manufacturing pad 200 is prepared (S2000).

The thrust bearing manufacturing pad 200 is a pad on which the friction surface 13a and the oil groove 13b are not formed.

Next, the thrusting manufacturing pad 200 is subjected to discharge machining with the electrode for electric discharge machining (S3000).

At this time, the electrode for electric discharge processing 100 becomes a cathode, and the pad 200 for manufacturing a thrust bearing becomes an anode.

Further, although not shown, the pad 200 for manufacturing a thrust bearing is immersed in dielectric oil to perform electric discharge machining.

However, the pad 200 for generating thrust bearing can be insulated from the electrode for electric discharge machining 100 by continuously injecting the insulating oil on the upper surface without being immersed in the dielectric oil.

Meanwhile, the discharge machining procedure will be briefly described. First, a voltage is applied to the electrode for electric discharge machining (100) and the pad for manufacturing thrust bearing (200), and then the gap is gradually narrowed.

Next, when the distance between the electrode for electric discharge machining (100) and the pad for manufacturing thrust bearing (200) reaches a predetermined distance, insulation by insulating oil is broken and arc discharge occurs, The pad 200 for forming a bearing is melted in a shape corresponding to the shape of the machining surface 110.

The electrode for electric discharge machining 100 moves reciprocally toward the thrust bearing manufacturing pad 200 and the thrust bearing manufacturing pad 200 is gradually melted so that a friction corresponding to the machining surface 110 Processing of the surface is completed.

In other words, according to the method for manufacturing a thrust bearing of the present invention, since the electrode for electric discharge machining 100 is used without the need of a metal mold as in the case of press machining, the cost for manufacturing a metal mold can be greatly reduced.

In addition, since the abrasion rate of the electrode for electric discharge machining 100 is smaller than that of the metal mold for press working, the use period can be increased and the design can be easily changed

Further, since the friction surface is formed by being pressurized or melted without being physically cut, the surface roughness is very small and the quality of the thrust bearing can be greatly improved.

Next, the manufacturing of the thrust bearing 300 is completed through a post-treatment process such as cleaning and drying (S4000).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the present invention. Various changes and modifications will be possible.

100: electrode for electric discharge machining 110:
200: Thrust bearing production pad 300: Thrust bearing

Claims (5)

Preparing an electrode for electric discharge machining embossed in a shape corresponding to a friction surface of a thrust bearing of a turbocharger for a vehicle;
Preparing a thrust bearing manufacturing pad; And
And discharging the pad to the electrode for electric discharge machining to form the frictional surface, thereby manufacturing a thrust bearing.
The method according to claim 1,
Wherein the friction surface has an inclined surface inclined at a predetermined height.
3. The method of claim 2,
Wherein the height of the inclined surface is a specific height between 30 μm and 40 μm.
The method according to claim 1,
Wherein an oil groove is formed at an edge of a friction surface of the thrust bearing and the electrode for electric discharge machining is embossed and prepared in a shape corresponding to the friction surface and the oil groove. .
A thrust bearing of a turbocharger for a vehicle manufactured by the method for manufacturing a thrust bearing according to any one of claims 1 to 4.
KR1020150100483A 2015-07-15 2015-07-15 Method of manufacturing thrust bearing of vehicle turbocharger using electric discharge machining KR20170009072A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150100483A KR20170009072A (en) 2015-07-15 2015-07-15 Method of manufacturing thrust bearing of vehicle turbocharger using electric discharge machining

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150100483A KR20170009072A (en) 2015-07-15 2015-07-15 Method of manufacturing thrust bearing of vehicle turbocharger using electric discharge machining

Publications (1)

Publication Number Publication Date
KR20170009072A true KR20170009072A (en) 2017-01-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3438478A1 (en) * 2017-08-03 2019-02-06 Goodrich Corporation Electrodynamically finished plain bearings

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3438478A1 (en) * 2017-08-03 2019-02-06 Goodrich Corporation Electrodynamically finished plain bearings
US10274011B2 (en) 2017-08-03 2019-04-30 Goodrich Corporation Electrodynamically finished plain bearings
EP3875794A1 (en) * 2017-08-03 2021-09-08 Goodrich Corporation Electrodynamically finished plain bearings

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