KR101677373B1 - Manufacturing method of member for outer and inner race for taper bearing - Google Patents

Manufacturing method of member for outer and inner race for taper bearing Download PDF

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Publication number
KR101677373B1
KR101677373B1 KR1020150084842A KR20150084842A KR101677373B1 KR 101677373 B1 KR101677373 B1 KR 101677373B1 KR 1020150084842 A KR1020150084842 A KR 1020150084842A KR 20150084842 A KR20150084842 A KR 20150084842A KR 101677373 B1 KR101677373 B1 KR 101677373B1
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KR
South Korea
Prior art keywords
outer ring
cutting
ring member
diameter
inner diameter
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KR1020150084842A
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Korean (ko)
Inventor
최영선
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셰플러코리아(유)
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    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/08—Upsetting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
    • B23D15/02—Shearing machines or shearing devices cutting by blades which move parallel to themselves having both upper and lower moving blades
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • 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
    • F16C2220/40—Shaping by deformation without removing material
    • F16C2220/46—Shaping by deformation without removing material by forging
    • 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
    • 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
    • F16C2220/80—Shaping by separating parts, e.g. by severing, cracking
    • F16C2220/82—Shaping by separating parts, e.g. by severing, cracking by cutting
    • 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
    • F16C2220/80—Shaping by separating parts, e.g. by severing, cracking
    • F16C2220/84—Shaping by separating parts, e.g. by severing, cracking by perforating; by punching; by stamping-out

Abstract

The present invention relates to an outer ring for a tapered bearing and a method for processing a member for an inner ring, wherein the outer ring formed by a bearing material and formed by press molding is an outer ring for a tapered bearing, To an inner ring member processing method.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an outer ring for a tapered bearing,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer ring for a tapered bearing and a method of processing a member for an inner ring, and more particularly, to an outer ring for a tapered bearing and a method for processing the inner ring member.

As shown in Figs. 1 and 2, the conventional outer ring and inner ring member processing methods for tapered bearings include an upsetting step, a forming step, a cutting tare, a sizing step, and a cutting step.

In the upsetting step, the bar-shaped cutting member 10 having a circular cross section is pressed upward and downward to form the upsetting member 20.

In the molding step, the upsetting member 20 is press-formed so that the upwardly open bearing material 30 is formed. The bearing material 30 is composed of an inner ring part 31 and an outer ring part 33.

The inner ring part 31 is formed as a hollow body having a circular section and a lower part provided with a removal part 35 and opening upward. The inner ring portion 31 has an inner diameter portion 31-1 having a circular cross section and a first inclined portion 31-3 formed to reduce the outer diameter of the inner diameter portion 31 downward. The inner diameter portion 31-1 is formed in a cylindrical shape.

The outer ring portion 33 is formed in a hollow cylindrical shape having a circular cross section and extending outward from the radially outer side of the upper portion of the inner ring portion 31 and extending upward. The inner diameter surface of the outer ring portion 33 is provided with a second inclined portion 33-3 which is formed so as to increase the inner diameter upward. The height H11 of the outer ring portion 33 is formed to be smaller than the height of the outer ring member 33 " since the height of the outer ring portion 33 increases after the sizing step.

A second width 31 extending from the upper end of the inner diameter portion 31-1 of the inner ring portion 31 to the second inclined portion 33-3 in the radial direction is provided between the inner ring portion 31 and the outer ring portion 33 And a first width 337 extending from the outer diameter portion 33-1 of the outer ring portion 33 to the first inclined portion 31-3 in the radial direction.

In the cutting step, the inner ring part 31, the outer ring part 33 and the removal part 35 are separated to form the inner ring member 31 'and the outer ring front member 33'.

In Fig. 1, reference numeral 31-5 denotes a first cutting portion, and 33-5 denotes a second cutting portion. The first cutting portion 31-5 is sheared by the shearing process and the removing portion 35 is separated from the inner ring portion 31. [ The inner diameter of the first cutting portion 31-5 is equal to the inner diameter portion 31-1. The second cutting portion 33-5 is sheared by shearing and the outer ring portion 33 and the inner ring portion 31 are separated. The diameter of the second cutting portion 33-5 becomes the outer diameter of the inner ring portion 31 and becomes the inner diameter of the outer ring portion 33. [

In the tapered roller bearing manufacturing process in which the inner ring portion 31 and the outer ring portion 33 are integrally formed and subjected to shear separation to form inner and outer rings, respectively, The inner ring member 31 'is formed so as to have a machining allowance dimension, and the outer ring front member 33' is formed so as to have an inner diameter corresponding to the inner ring member 31 '. Therefore, the inner diameter of the outer ring full member 33 'is formed larger than the inner diameter of the outer race member 33' 'to be machined.

Since the inner diameter of the outer ring front member 33 'is larger than the inner diameter of the outer ring member 33' 'to be machined, the outer diameter of the outer ring front member 33' is made larger than the outer diameter of the outer ring member 33 ' So that the outer diameter and the inner diameter of the member 33 'are reduced simultaneously. Since the height is increased by the sizing process, the height of the entire outer ring member 33 'in the molding process is smaller than the height of the outer ring member 33 "to be machined.

As shown in FIG. 2, in the sizing step, the entire outer ring member 33 'passes through the sizing die 3 to form the outer ring member 33' '.

The sizing die (3) is provided with a hollow body which is opened to both sides in the up and down direction. The upper portion of the inner surface of the sizing die 3 is formed so that its inner diameter increases as it goes upward and its inner diameter increases as it goes down.

The outer race member 33 '' is formed by passing the sizing die 3 so that the outer diameter portion Do1 and the inner diameter portion Di2 of the outer ring front member 33 'are reduced. The outer race member 33 '' is formed by increasing the height H11 of the outer race front member 33 '. In the sizing step, the sizing process may be performed three or more times depending on the amount of reduction.

In the cutting step, the inner ring member 31 'and the outer ring member 33' are cut and then subjected to a heat treatment-grinding process to form inner and outer rings, respectively. Generally, the outer race member 33 '' and the inner race member 31 'are formed to have a working margin in the range of 1 to 2.5 mm. The inner diameters of the inner race member 31 'and the outer race member 33' 'are formed to be smaller by 1 to 2.5 mm than the inner diameters of the inner and outer rings after machining. The outer diameters of the inner and outer ring members 31 'and 33' 'are formed to be larger than the outer diameters of the inner and outer rings after machining by a range of 1 to 2.5 mm. The height of the inner and outer ring members 31 'and 33' 'is formed to be larger by 1 to 2.5 mm than the height of the inner and outer rings after machining.

Conventionally, in the outer ring and inner ring member processing methods for the tapered bearing, the outer ring front member 33 'is formed as the outer race member 33' 'through the sizing step. The diameter of the outer and inner diameters of the outer race member 33 "subjected to the sizing step is reduced, so that the shape of the metal flow of the outer race is cut off. As a result, when the bearing is used, there is a problem that cracks are generated in the disconnected part of the metal flow of the outer ring and the life of the bearing is shortened.

Korean Registered Patent No. 10-0649929 (November 20, 2006)

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the problems described above, and it is an object of the present invention to provide a tapered bearing outer ring and an inner ring, which are simple in machining of the outer ring member and do not cut off the metal flow formed during the pressing process, And an object of the present invention is to provide a member processing method.

The outer ring and inner ring member processing method of the present invention comprises an upsetting step, a shaping step, a cutting step, and an entire outer ring member pressing step;

In the upsetting step, a bar-shaped cutting member having a circular cross section is pressed upward and downward to form an upsetting member;

Wherein in the forming step, the upsetting member is pressed to form a upwardly open bearing material; Wherein the bearing material comprises an inner ring part and an outer ring part; Wherein the inner ring portion is formed by a hollow body having a circular cross section and a removal portion at a lower portion and having an upwardly opened hollow portion, a first inclined portion formed to have an outer diameter smaller than that of the inner diameter portion, Is formed in a cylindrical shape; Wherein the outer ring portion is formed in a hollow body having a circular cross section and extending radially outwardly from the upper portion of the upper portion of the inner ring portion and extending upwardly and having an inner diameter increasing in an upward direction on an inner diameter surface thereof, A first transverse surface extending from an upper end of the inner diameter portion of the inner ring portion to a second inclined portion in a radial direction and extending radially from an outer diameter portion of the outer ring portion to a first inclined portion, ;

In the cutting step, the inner ring part and the outer ring part are separated and the removal part of the inner ring part is separated to form the inner ring member and the outer ring front member open in both directions; Wherein the outer ring front member is larger than an inner diameter of the outer ring member and larger than a height of the outer ring member;

Wherein the outer ring front member is pressurized in an up-and-down direction to reduce the inner diameter and the height of the outer ring front member, and the outer ring member is formed of an outer ring member in the pressing process of the outer ring front member.

In the cutting step, the inner ring part and the outer ring part are separated from the second cutting part and are formed of an inner ring member and a whole outer ring member in the cutting step; Wherein the first width and the second width are spaced apart in the up-and-down direction and partially overlap in the radial direction; The second cutting portion is formed at an overlapped position of the first widthwise surface and the second widthwise surface and the cutting surface of the second cutting portion is an inner diameter surface of the outer ring front member and an outer diameter surface of the inner ring member.

The outer ring front member has a third wide surface extending radially outward from the upper end of the second angled portion to the outer diameter portion and a first wide surface portion formed between the outer and inner surfaces of the outer ring front member as a part of the first wide surface ;

The outer diameter portion is supported in the step of pressing the entire outer ring member, and the third width side and the first width portion are pressed up and down.

In the above-described step of pressing the entire outer ring member, the outer ring front member is maintained in its outer diameter, the height of the outer ring front member is reduced, and the inner diameter of the outer ring member is reduced to form the outer ring member; And the outer ring member is as large as the machining allowance.

In the above, the inner ring member is cut and formed as an inner ring; And the outer ring front member is vertically compressed to be formed of an outer ring member, and after the compression, the outer ring member is formed by cutting the outer ring member.

The diameter of the outer diameter portion of the outer ring portion is larger than the outer diameter of the outer ring by a machining allowance.

In the above-described step of pressing the entire outer ring member, the first widthwise portion and the third widthwise surface of the outer ring front member are pressed so that the second inclined portion is expanded radially inwardly; And the second inclined portion to be inflated is pressed outward by the projecting portion of the punch to form the outer race member.

In the method for machining an outer ring and a member for an inner ring according to the present invention, the outer ring front member is pressurized in the upper and lower directions and is formed without changing the diameter of the outer diameter of the outer ring front member so that the metal flow shape of the cut outer ring is not disconnected, The life of the tapered bearing is increased and the pressing process of the entire outer ring member is formed by a single compression process.

1 is a cross-sectional view showing a conventional tapered bearing outer ring and inner ring member processing method,
2 is a cross-sectional view showing a sizing step of a conventional method for processing outer ring and inner ring members for a tapered bearing,
Fig. 3 is a view showing a method of working an outer ring and a member for an inner ring for a tapered bearing according to the present invention,
4 is a cross-sectional view showing a step of pressurizing the entire outer ring member of the outer ring and inner ring member working method for a tapered bearing of the present invention,
5 is a flow chart of the method for machining outer ring and inner ring members for tapered bearings of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method for processing an outer ring and a member for an inner ring according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a cross-sectional view showing a step of pressing all the outer ring members of the tapered bearing outer ring and inner ring member processing method of the present invention, and FIG. 5 is a flow chart of the method for machining outer ring and inner ring members for tapered bearings of the present invention.

In Fig. 4, the horizontal direction is defined as "radial direction " and the vertical direction is defined as" vertical direction ".

5, the method for machining outer ring and inner ring members for a tapered bearing according to the present invention includes an upsetting step ST-100, a forming step ST-200, a cutting step ST-300, An outer ring full member pressing step ST-400, and a cutting step ST-500.

In the upsetting step ST-100, the bar-shaped cutting member 100 having a circular cross section is pressed in the vertical direction to form the upsetting member 200. The cutting member 100 is provided on the lower mold 1 so that the upper mold 1 'is vertically moved and pressed.

In the forming step ST-200, the upsetting member 200 is pressed to form the bearing material 300. The bearing material 300 is provided with an upward opening. The bearing material 300 includes an inner ring part 310 and an outer ring part 330.

The inner ring portion 310 is formed so as to have a machining allowance dimension and the outer ring portion 330 is formed so as to have an inner diameter aligned with the inner ring portion 310. [

The inner ring part 310 is formed as a hollow body having a circular cross section and opened upward. The inner ring part 310 is provided with a removal part 350 at a lower part thereof. The inner ring portion 310 has an inner diameter portion 311 having a circular cross section. The inner diameter portion 311 is formed into a cylindrical shape. The inner diameter portion 311 may be formed to be inclined by 1 to 2 degrees in the up-and-down direction so as to have a larger cross-sectional area. Since the inner diameter portion 311 is formed to be inclined, it is easy to separate from the punch when it is pushed out after being pushed.

A first inclined portion 313 is formed on the outer diameter surface of the inner ring portion. The first inclined portion 313 is formed so that its outer diameter decreases as it goes downward. An extension 319 is formed at a lower portion of the first inclined portion 313. The extension portion 319 extends downward from the lower portion of the first inclined portion 313.

And a first cutting portion 315 between the extending portion 319 and the removing portion 350. The cutting portion 315 is a hypothetical surface having the same size as the diameter Dc1 of the removing portion 350 as a virtual cutting surface. The diameter Dc1 of the removal part 350 is formed to have the same diameter as the inner diameter part Di2. The first cutting portion 315 is formed to have the same diameter as the inner diameter portion Di2. The first cutting portion 315 is cut at the cutting step ST-300.

The height H22 of the inner ring part 310 is a distance (height) from the lower surface of the removal part 350 to the second width surface 317. The inner diameter portion Di2 and the height H22 of the inner ring portion 310 are formed as large as the machining allowance to be machined in the machining step ST-500.

The outer ring part 330 is formed as a hollow body having a circular cross section and opened up and down. The outer ring part 330 extends outwardly from the outer side of the inner ring part 310 in the radial direction and extends upward. A second inclined portion 333 is formed on the inner surface of the outer ring portion 330. The second inclined portion 333 is formed so that its inner diameter increases as it goes upward.

An outer diameter portion 331 is formed on an outer diameter surface of the outer ring portion 330. The outer diameter portion 331 is formed in a cylindrical shape. The outer diameter portion 331 may be formed to be inclined by 1 to 2 degrees in the vertical direction so as to have a larger cross-sectional area. Since the outer diameter portion 331 is formed to be inclined, it is easy to separate from the mold when it is pushed and discharged after punching. The height H21 of the outer ring part 330 is a distance (height) in the vertical direction from the first width 337 to the third width 339. The height H21 of the outer ring part 330 is formed to be larger than the height H21 'of the outer ring member 330 ".

A third width 339 is formed on the outer ring part 330. The third widthwise surface 339 is formed to extend radially outward from the upper end of the second inclined portion 333 to the outer diameter portion 331.

The inner ring portion 310 and the outer ring portion 330 are connected to each other by a second widthwise surface 317 and a first widthwise surface 337. The second widthwise surface 317 is formed to extend from the upper end of the inner diameter portion 311 of the inner ring portion 310 to the second inclined portion 333 in the radial direction. The first widthwise surface 337 has a first widthwise surface 337 extending from the outer diameter portion 331 of the outer ring portion 330 to the first inclined portion 313 in the radial direction.

The first wide surface 337 and the second wide surface 317 are spaced apart from each other in the vertical direction. The first wide surface 337 and the second wide surface 317 are partially overlapped in the radial direction. And a second cutting portion 335 which is a virtual front end portion at a position where the first wide surface 337 and the second wide surface 317 overlap. The second cutting portion 335 is a virtual cylindrical surface having a diameter equal to the outer diameter Dc2 of the inner ring portion 310. [ The outer diameter Dc2 of the inner ring part 310 sheared in the second cutting part 335 is equal to the inner diameter Dc2 of the outer ring part 330. [ The outer diameter Dc2 of the inner ring part 310 is formed to be larger than the machining allowance to be machined in the cutting step ST-500. The second cutting portion 335 is cut at the cutting step ST-300.

In the cutting step (ST-300), shearing is performed at the first cutting portion 315 and the second cutting portion 335. The cutting step ST-300 is sheared at the first cutting portion 315 and the second cutting portion 335 by shearing. And the removal unit 350 of the bearing material 300 is separated from the first cutting unit 315. The cutting surface of the first cutting portion 315 formed on the inner ring portion 310 is separated from the removal portion 350 so as to extend from the inner diameter portion 311.

And the inner ring part 310 and the outer ring part 330 are separated from each other by being cut by the second cutting part 335. The inner ring part 310 is separated from the inner ring part 310 '. The inner ring member 310 'is formed as a hollow body which is opened in the vertical direction. The outer ring part 330 is separated to form the outer ring full member 330 '. The entire outer ring member 330 'is formed as a hollow body which is opened in the vertical direction. The cutting surface of the second cutting portion 335 is an outer diameter surface of the inner ring member 310 'and an inner diameter surface of the outer ring front member 330'.

The entire outer ring member 330 'is composed of the third wide surface 339, the second tilted portion 333, the outer diameter portion 331 and the first wide surface portion 337' which is a part of the first wide surface 337 . The first wide surface portion 337 'is formed between the inner and outer surfaces of the entire outer ring member 330'.

The inside diameter of the entire outer ring member 330 'is made larger than the inner diameter of the outer ring member 330 "to be machined, and the outer diameter is formed like the outer ring member 330" to be machined. The height H21 of the entire outer ring member 330 'is formed to be higher than the height H21' of the outer ring member 330 and the height H21 'of the outer ring front member 330' The inner diameter and the height are simultaneously reduced.

In the step of pressing the entire outer ring member ST-400, the outer ring member 330 'is pressed upward and downward to form the outer ring member 330'.

4, the entire outer ring member 330 'is positioned in the groove formed in the die 7 and is pushed by the punch 5. The punch 5 protrudes downward and is formed to be convex. The punch 5 has a protrusion for pressing the inner surface of the entire outer ring member 330 '. The die 7 may be separated vertically or radially. The outer ring front member 330 'is supported by the die 7 with the outer diameter portion 331. The third width 339 and the first width portion 337' Lt; / RTI > The third width surface 339 and the first width surface 337 'are pressed by the punch 5 and the second oblique portion 333 is pressed by the pressure generated by the third width surface 339, Direction. The inner diameter of the second inclined portion 333 to be inflated is reduced. The second inclined portion 333, which expands inward in the radial direction, is pressed outward by the projecting portion of the punch 5. The inclined portion of the outer race member 330 " formed by being pushed by the punch 5 is formed as large as the machining allowance.

The outer ring member 330 "formed by pressing the entire outer ring member 330 'is supported by the die 7 to maintain the outer diameter Do2 of the outer ring whole member 330'. The height H21 'of the outer race member 330' 'is smaller than the height H21 of the outer race member 330'. The inner diameter of the outer race member 330 '' is smaller than the inner diameter Dc2 of the outer race portion 330 '. The inner diameter Dc2 of the outer ring part of the entire outer ring member 330 'is supported and the outer diameter part 331 of the outer ring front member 330' is supported so that the first wide surface part 337 ' And the lower width surface 337 " of the outer race member 330 " is formed.

The lower portion of the protrusion of the punch 5 presses the upper portion of the cutting surface of the second cutting portion 335 in the step of pressing the entire outer ring member (ST-400). The height of the second cutting surface 335 'of the outer race member 330' is reduced by 5 to 7 mm from the height of the cutting surface formed by the second cutting portion 335 of the outer race portion 330 . As the height of the cutting surface of the entire outer ring member 330 'is reduced, the metal flow is improved as compared with the conventional sizing process.

The outer race member 330 'formed through the sizing process repeated three times or more requires a long time and effort, and the height of the outer race member 330', which is elongated through the sizing process, The outer ring member 330 '' formed through the step of pressing the entire outer ring member ST-400 according to the present invention has a height of the outer ring member 330 " Do2) are formed so as to be aligned at one time, so that the time and effort are reduced and the efficiency of the manufacturing process is increased.

 In the cutting step ST-500, the inner ring member 310 'and the outer ring member 330' are cut. The inner ring member 310 'and the outer ring member 330' are cut and then subjected to a heat treatment-grinding process to form an inner ring and an outer ring.

The outer race member 330 "formed through the step of pressing the all-wheel whole member ST-400 is formed without changing the outer diameter Do2 of the outer race front member 330 ', whereby the metal flow shape of the outer race cut- The life of the bearing is increased.

Although the method for machining outer ring and inner ring members for tapered bearing according to the present invention has been described with reference to the embodiments shown in the drawings, it is merely an example, and various modifications and equivalent other embodiments can be made by those skilled in the art I will understand that. Accordingly, the scope of the true technical protection should be determined by the technical idea of the appended claims.

100: cutting member 200: upsetting member
300: Bearing material 310: Inner ring part
311: inner diameter portion 313: first inclined portion
315: first cutting portion 317: second width
319: extension part 330: outer ring part
331: outer diameter portion 333: second inclined portion
335: second cutting portion 337: first width
339: Third Warming Surface 350: Removal
310 ': inner wheel member 330': outer ring front member
330 ": outer ring member

Claims (7)

(ST-100), a molding step (ST-200), a cutting step (ST-300), and a step of pressurizing the entire outer ring member (ST-400);
In the upsetting step (ST-100), a bar-shaped cutting member 100 having a circular cross section is pressed upward and downward to form the upsetting member 200;
In the forming step ST-200, the upsetting member 200 is pressed to form the upwardly-opening bearing material 300; The bearing material 300 comprises an inner ring part 310 and an outer ring part 330; The inner ring part 310 is formed as a hollow body having a circular cross section and a lower part provided with a removing part 350 and having an upward opening and has an inner diameter part 311 having a circular section, The first inclined portion 313 is formed, and the inner diameter portion 311 is formed into a cylindrical shape; The outer ring part 330 is formed as a hollow body having a circular cross section and extending radially outward from the upper part of the upper part of the inner ring part 310 and extending upwardly and a second inclined part 333 formed so as to increase in inner diameter as it goes upward, ; And a second widthwise surface 317 extending from the upper end of the inner diameter portion 311 of the inner ring portion 310 to the second inclined portion 333 in the radial direction. (331) extending to the first inclined portion (313) in the direction of the arrow, and the outer diameter portion (331) is provided in a cylindrical shape;
The first wide surface 337 and the second wide surface 317 are vertically spaced apart and partially overlap each other in the radial direction and the second wide surface 317 and the second wide surface 317 are overlapped. A cutting portion 335 is formed;
In the cutting step ST-300, the inner wheel member 310 'separated from the second cutting portion 335 and separated from the removal portion 350 of the inner ring portion 310 and opened in both directions, 330 ') are formed; The entire outer ring member 330 'is larger than the inner diameter of the outer ring member 330''and is formed to be larger than the height of the outer ring member 330'';
The entire outer ring member 330 'is pressed in the vertical direction to decrease the inner diameter and the height of the cutting surface of the outer diameter portion 331 and the second cutting portion 335 And the outer ring member 330 '' as the outer ring member 330 '' is reduced. 4. The method of manufacturing an internal combustion engine according to claim 1, wherein the inner ring part (310) and the outer ring part (330) are separated from the second cutting part (335) ); , And the cutting surface of the second cutting portion (335) is an inner diameter surface of the outer ring front member (330 ') and an outer diameter surface of the inner ring member (310'). 3. The apparatus according to claim 2, wherein the entire outer ring member (330 ') includes a third width (339) extending radially outward from the top of the second ramp (333) to the outer diameter portion (331) A first width portion 337 'formed between the outer and inner surfaces of the entire outer ring member 330';
, The outer ring portion 331 is supported and the third width surface 339 and the first width portion 337 'are pressed up and down in the step of pressing the entire outer ring member ST-400. Method of processing member for inner ring. 2. The method according to claim 1, wherein, in the step of pressing the entire outer ring member (ST-400), the outer ring front member (330 ') is maintained at the outer diameter (Do2) And the inner diameter Dc2 of the outer ring part is reduced to form the outer ring member 330 ", and the outer ring member 330" is as large as the machining allowance. 5. The apparatus of claim 4, wherein the inner race member (310 ') is machined to form an inner race; The outer ring member 330 'is vertically compressed to be formed as an outer ring member 330', and after the compression, the outer ring member 330 'is cut and formed as an outer ring. Member processing method. 6. The outer ring for a tapered bearing according to claim 1 or 5, wherein the outer diameter portion (Do2) of the outer ring portion (330) is larger than the outer diameter of the outer ring. 4. The method according to claim 3, wherein in the step of pressing the entire outer ring member (330), the first widthwise portion (337 ') and the third widthwise surface (339) The portion 333 is expanded radially inwardly; Wherein the second inclined portion (333) to be expanded is pressed outward by the projecting portion of the punch (5) to form the outer race member (330 '').
KR1020150084842A 2015-06-16 2015-06-16 Manufacturing method of member for outer and inner race for taper bearing KR101677373B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56113827A (en) * 1980-02-14 1981-09-08 Koyo Seiko Co Ltd Manufacture of inner and outer ring of conical roller bearing
JPS5852732B2 (en) * 1976-02-09 1983-11-25 エヌ・テ−・エヌ東洋ベアリング株式会社 Method for simultaneously manufacturing materials for inner and outer rings of conical roller bearings with model numbers that overlap in size
JP2004141964A (en) * 2002-10-25 2004-05-20 Sakamura Hot Art Co Ltd Apparatus for manufacturing inner and outer ring in hot former
KR100649929B1 (en) 2006-01-17 2006-11-28 주식회사 일진글로벌 Inner race structure of taper roller bearing

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5852732B2 (en) * 1976-02-09 1983-11-25 エヌ・テ−・エヌ東洋ベアリング株式会社 Method for simultaneously manufacturing materials for inner and outer rings of conical roller bearings with model numbers that overlap in size
JPS56113827A (en) * 1980-02-14 1981-09-08 Koyo Seiko Co Ltd Manufacture of inner and outer ring of conical roller bearing
JP2004141964A (en) * 2002-10-25 2004-05-20 Sakamura Hot Art Co Ltd Apparatus for manufacturing inner and outer ring in hot former
KR100649929B1 (en) 2006-01-17 2006-11-28 주식회사 일진글로벌 Inner race structure of taper roller bearing

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