CN108127111A - A kind of sintered metal bearing and its manufacture craft - Google Patents
A kind of sintered metal bearing and its manufacture craft Download PDFInfo
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- CN108127111A CN108127111A CN201711171757.7A CN201711171757A CN108127111A CN 108127111 A CN108127111 A CN 108127111A CN 201711171757 A CN201711171757 A CN 201711171757A CN 108127111 A CN108127111 A CN 108127111A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000002184 metal Substances 0.000 title claims abstract description 20
- 230000002093 peripheral effect Effects 0.000 claims abstract description 100
- 239000000843 powder Substances 0.000 claims description 40
- 239000000956 alloy Substances 0.000 claims description 17
- 229910045601 alloy Inorganic materials 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 13
- 238000007493 shaping process Methods 0.000 claims description 11
- 238000005245 sintering Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims description 3
- 238000004663 powder metallurgy Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims 1
- 229910052738 indium Inorganic materials 0.000 claims 1
- 239000010687 lubricating oil Substances 0.000 abstract description 22
- 239000003921 oil Substances 0.000 abstract description 16
- 238000012937 correction Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 6
- 239000012634 fragment Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
Classifications
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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
- F16C33/02—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
- F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
- F16C33/104—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing in a porous body, e.g. oil impregnated sintered sleeve
-
- B22F1/0003—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/121—Use of special materials
-
- 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
- F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
- F16C33/128—Porous bearings, e.g. bushes of sintered alloy
-
- 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
- F16C33/145—Special methods of manufacture; Running-in of sintered porous bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- 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
- F16C2204/00—Metallic materials; Alloys
- F16C2204/60—Ferrous alloys, e.g. steel alloys
-
- 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
- F16C2220/20—Shaping by sintering pulverised material, e.g. powder metallurgy
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The present invention relates to a kind of oiliness bearing manufacture craft, especially a kind of sintered metal bearing and its manufacture craft.Since the gap of bearing peripheral surface is destroyed, lubricating oil will not be maintained the present invention from the oil pressure in air gap leakage, bearing hole.Therefore, even if lubricating oil is leaked out from peripheral surface it cannot be guaranteed that the circularity of the connecting component equipped with bearing, can also prevent lubricating oil from being leaked from peripheral surface；Lubricating oil can be reliably prevented to leak out from peripheral surface, be less than 10% in the part that peripheral surface overhead position is subject to crushing；It can fill up compact by vacancy of the crushing in green state, relatively large job vacancy.Since the gap opened up on the peripheral surface of bearing in this way is crushed, so lubricating oil will not be leaked from peripheral surface, it can keep the oil pressure in bearing hole, even if periphery spherical bearing is cylindrical surface, and it cannot be guaranteed wherein to be packed into the circularity of the attachment of bearing, the oil-impregnated sintered bearing that oil pressure can be kept in bearing hole can be obtained.
Description
Technical field
The present invention relates to a kind of oiliness bearing manufacture craft, especially a kind of sintered metal bearing and its manufacture craft.
Background technology
Powder metallurgy is a kind of few cutting or the manufacturing process without cutting, has and saves material, save working hour, save energy
The characteristics of source, therefore economic benefit protrudes.Conventional powder metallurgical technique is batch mixing, die mould, sintering, post processing.Powder metallurgy
With unique chemical composition and machinery, physical property, and these performances can not be obtained with traditional casting method.With
PM technique can be directly prepared into porous, half fine and close or full dense material and product, such as oiliness bearing, gear, cam, lead
Bar, cutter etc..Oiliness bearing can be divided mainly into metal sintering oiliness bearing and high molecular thermoplasticity tree from the aspect of material
Fat oiliness bearing, oiliness bearing are an indispensable class bearings in light industry, weaving and agricultural machinery.As industrial quarters is to oil-containing
The continuous improvement of bearing working performance requirement, oiliness bearing research have had been to be concerned by more and more people.
Invention content
In view of the deficienciess of the prior art, the present invention provides a kind of sintered metal bearing and its manufacture craft.
The present invention is for the technical solution that a kind of above-mentioned sintered metal bearing purpose of realization is taken：
A kind of sintered metal bearing uses powdered metallurgical material, which is characterized in that the oiliness bearing powdered metallurgical material
Ingredient including following weight：
Ti0.5wt%-2.0wt%、
Mo0.4wt%-1.0wt%、
Cs0.2wt%-0.6wt%、
Zr0.4wt%-1.0wt%、
Nb0.2wt%-0.5wt%、
Tc0.1wt%-0.4wt%、
Hf0.1wt%-0.3wt%、
Rh0.1wt%-0.3wt%、
Cu1wt%-1.5wt%、
Sn0.5wt%-1.0wt%、
Zn0.5wt%-1.0wt%、
Surplus is Fe.
The present invention is for the technical solution taken of manufacture craft purpose for realizing above-mentioned another kind sintered metal bearing：
A kind of manufacture craft of sintered metal bearing, the manufacture craft include forming formed body by raw material powder with molding die
Step：The gap being open on the peripheral surface of the shaping dies is squeezed by releasing the shaping dies from the shaping dies
It is molded to release obtained powder compact P, bearing body, sintered bearing body is made in the wherein powder compact P sintering described in it
Emptying aperture is crushed in the state of sintered alloy, the shaping dies described in it is included into mold, plug, low punch and upper punch；Tool
The plug for having cylindrical shape is coaxially placed in a mold;The cylindrical tubulose of low punch, and coordinate in this way
Between mold and plug so that low punch can be moved freely up and down;The cylindrical tubulose of upper punch, and can with upper punch
The mode freely up and down moved is assemblied between punch die and plug, with mold separation;In the outer surface of plug, the interior weekly form of mold
Face forms the upper punch of fill part in the upper and lower surface of low punch；Jog is formed in the inner peripheral surface of mold；
Length in the vertical region for being upwardly formed jog of mold is substantially equal to the length or longer of green compact；In jog and forming
The inner peripheral surface that the green compact of mold extrude the mold between mouth is mirror finish；And the protrusion formed on the peripheral surface of crude green body
The powder compact P that molding die is squeezed through on the mirror-like polished surface of crude green body and mold leaves opening.
As a further improvement, the inner peripheral surface of mold forms the peripheral surface of powder compact P, the upper surface of low punch forms one
A end face, the downside of upper punch form its another end face, and the peripheral surface of plug forms its slidingsurface, by grinding,
Cutting and electric discharge, mold（Inner peripheral surface.The length of jog is identical with the length of the powder compact P of bearing body or compared with jog
Throughout complete cycle formed.
As a further improvement, the inner peripheral surface of mold is finish-machined to mirror image shape by mirror-like, the depth H of inner peripheral end thereof is about
For 0 0.01mm, preferably 0.001 0.003；Inner peripheral surface at least more upper than jog is in mirror image forms.
As a further improvement, filling part is filled with raw material powder M, using upper punch and low punch to the original in filling part
Feed powder end M carry out punching press and form powder compact P, then, upper punch rises to the top of mold, by make low punch rise and
By stamping product P from punch die release in the case of, the emptying aperture on the peripheral surface of formed body P is formed in by jog in mold
On circumferential surface, inner peripheral surface is formed as mirror-like, and more upper than jog, that is, in filling part, on the peripheral surface of powder compact P
The jog of graphic arts die, since jog is located at the radial outside of the inner peripheral surface in mirror image shape.
As a further improvement, the bearing body is again corrected to scheduled size.
The manufacturing method advantageous effect of oil-impregnated sintered bearing of the present invention：
First since the gap of bearing peripheral surface is destroyed, and lubricating oil will not be obtained from the oil pressure in air gap leakage, bearing hole
To keep.Therefore, even if lubricating oil is leaked out from peripheral surface it cannot be guaranteed that the circularity of the connecting component equipped with bearing, can also prevent from moistening
Lubricating oil is leaked from peripheral surface.
Second, lubricating oil can be reliably prevented and leaked out from peripheral surface, be in the part that peripheral surface overhead position is subject to crushing
Less than 10%.
Third can fill up compact, relatively large job vacancy by vacancy of the crushing in green state.Due to this
The gap that sample opens up on the peripheral surface of bearing is crushed, so lubricating oil will not be leaked from peripheral surface, can keep bearing hole
Interior oil pressure, can even if periphery spherical bearing is cylindrical surface, and cannot be guaranteed wherein to be packed into the circularity of the attachment of bearing
To obtain the oil-impregnated sintered bearing that oil pressure can be kept in bearing hole.
4th, emptying aperture is crushed in the state of sintered alloy after sintering, it can be with the smaller emptying aperture of packing ratio.Due in this way
The gap being open on the peripheral surface of bearing is crushed, so lubricating oil will not be leaked out from peripheral surface, can keep in bearing hole
Oil pressure, even if the peripheral surface that can keep oil immersion sintered bearing bearing is cylindrical surface, can also obtain in bearing hole
Oil pressure, and cannot be guaranteed wherein be combined with bearing attachment circularity.
Description of the drawings
Fig. 1 is the stereogram for the bearing for representing the embodiment of the present invention 1.
Fig. 2 is the sectional view about the molding die of the partial enlargement of embodiment 1, is the state before filling raw material powder.
Fig. 3 is the sectional view about the molding die of embodiment 1, is the state of compression section.
Fig. 4 is the sectional view of the correction mold about the partial enlargement of embodiment 1, is the state before filling sintered alloy.
Fig. 5 is the sectional view of the correction mold about embodiment 1, is the state of companding improvement.
Fig. 6 is the peripheral surface of the bust shot bearing about embodiment 1, represents the figure of binary image.
Fig. 7 be about embodiment 1 expression by bearing be mounted on mounting portion on state front view.
Specific embodiment
The specific embodiment of the present invention is made a detailed explanation below in conjunction with the accompanying drawings.
The embodiment of the present invention is described below.
Fig. 1 Fig. 6 shows the embodiment 1 in the present invention.As shown in Figure 1, sintered metal bearing 1 is by containing vacancy
The bearing of bearing hole 3 is set on the bearing body 1 that porous sintered alloy is formed.Immersion oil sintered bearing 1 is cylinder, as shown in Figure 1.
Shown in Fig. 7, the outer diameter rotary shaft 9 smaller than the outer diameter of bearing hole 3 is inserted into bearing hole 3.Sliding surface 4 is the interior of bearing hole 3
Circumferential surface, rotary shaft 9 is inserted into bearing hole 3, and is rotated so that the peripheral surface of rotary shaft 9 and 4 sliding contact of slidingsurface.
In addition, end face 6 parallel to each other and flat is arranged on the both sides on the length direction of sliding surface 4.Specifically, bearing body 1 exists
There is the emptying aperture 8 comprising lubricating oil in entire in circumferential direction.As a result, since lubricating oil can be on the circumferencial direction of bearing body 1
It moves freely, therefore it can be uniformly distributed on each part of bearing body 1, without in any partial interruption, this can be with
Comprising a large amount of lubricating oil on the other hand, the peripheral surface 7 of bearing body 1 is in state or the cavity that a large amount of cavity 8 is crushed
The state that 8 average diameter becomes smaller.Therefore, the surface vacancy rate of the per unit area of peripheral surface 7 is low, and surface vacancy rate is 10%
Hereinafter, preferably less than 5%.Next, illustrate that an example of the manufacturing method of sintered metal bearing retouches Primary Reference Fig. 1
State Fig. 1 with above-mentioned composition.
5 oil-impregnated sintered bearings 1 of Fig. 2 manufacture as follows：By suppressing the oiliness bearing powder smelting
Golden material includes the ingredient of following weight：
Ti0.5wt%-2.0wt%、
Mo0.4wt%-1.0wt%、
Cs0.2wt%-0.6wt%、
Zr0.4wt%-1.0wt%、
Nb0.2wt%-0.5wt%、
Tc0.1wt%-0.4wt%、
Hf0.1wt%-0.3wt%、
Rh0.1wt%-0.3wt%、
Cu1wt%-1.5wt%、
Sn0.5wt%-1.0wt%、
Zn0.5wt%-1.0wt%、
Surplus forms green compact, and be sintered for the raw material powder of Fe, then corrects its shape.In Fig. 2 and Fig. 2,
Fig. 3 shows molding die 11, and Fig. 3 is further illustrated forms the state of powder compact P by suppressing raw material powder M.
As shown in the figure, the axial direction for being used to form the shaping dies 11 of powder compact is vertical direction（Suppress vertical axis）, molding die
11 have mold 12, and plug 13, low punch 14, upper punch 15, mold 12 is cylindrical, and plug 13 is cylindrical,
In mold 12, it is located on same axis with mold 12.Low punch 14 is cylindrical, freely low with mold 12 and plug 13
Side.
Upper punch 15 is cylindrical, is embedded between mold 12 and plug 13 with freely being vertically moved from top, can be free
Ground passes in and out.Filling part 16. is formed between mold 12, plug 13 and low punch 14
The inner peripheral surface of mold 12 forms the peripheral surface 7 of powder compact P, and the upper surface of low punch 14 forms one end face 6, upper punch
15 downside forms its another end face, and the peripheral surface of plug 13 forms its slidingsurface 4.By grinding, cut and put
Electricity, the inner peripheral surface 17 of mold 12.The length of jog 21 is identical or longer than its with the length of the powder compact P of bearing body 1.It is concave-convex
Portion 21 is formed throughout complete cycle.The surface roughness of jog 21 is selected according to the grain size of the raw material powder formed, at this
It is set as 2 15S, preferably 5 8S in example.
On the other hand, the inner peripheral surface 17 of mold 12 is finish-machined to mirror image shape by mirror-like.The depth H of inner peripheral end thereof is about
0 0.01mm, preferably 0.001 0.003.Inner peripheral surface 17 at least more upper than jog 21 is in mirror image forms.
As shown in figure 3, filling part 16 is filled with raw material powder M, using upper punch 15 and low punch 14 in filling part 16
Raw material powder M carry out punching press and form powder compact P. then, upper punch 15 rises to the top of mold 12, by making undershoot
First 14 rise by stamping product P from the case that punch die 12 is released, and the emptying aperture 8 on the peripheral surface 7 of formed body P is by jog
21 are formed on the inner peripheral surface 17 of mold 12, and inner peripheral surface 17 is formed as mirror-like, and more upper than jog 21.That is, filling
In portion 16, the jog 21 of graphic arts die 12 on the peripheral surface 7 of powder compact P, since jog 21 is located in mirror image shape
The radial outside of circumferential surface 17,
Therefore 7 green compact P of peripheral surface es 17 more slightly wider than inner peripheral surface and microcosmic.When green compact P is released by low punch 14, peripheral surface 7
On the parts of minute asperities be ground by jog 21, the fragment and fractionlet ground is placed into the gap 8 in outside in addition, passing through
Make it smooth, and therefore fill vacancy 8 in the inner peripheral surface 17 of mirror image forms.In other words, when green compact P is pushed out, periphery
Face 7 is compressed, and part that is wider than inner peripheral surface 17 and having minute asperities on powder compact P is placed in gap 8, and vacancy 8 is filled up.
In this case, since these steps carry out before green compact P sintering, so can be in the peripheral surface 7 of green compact P
Flatten sizable vacancy.It because if the part with microcosmic bumps is more ground than inner circumferential hem width lapped face 17, and presses
Powder P is pulled to the exiting side of inner peripheral surface 17 in this way, then is difficult to push it if depth H is more than 0.01mm.Cause
This, as described above, depth H is set to 0.01mm hereinafter, it is preferred that below 0.003mm.Bearing body 1 is by being sintered by above-mentioned technique
The powder compact of formation and be made.Moreover, the bearing body 1 being made of sintered alloy is corrected to scheduled size.
In Fig. 4 and Fig. 4, Fig. 5 shows Correction Die 11A.The axial direction of Correction Die 11A is vertical direction（Press-in is hung down
Nogata to）Axis direction）.Correction Die 11A has mold 12A, plug 13A, low punch 14A and upper punch 15A.Mold 12A is several
Cylinder, almost cylinder plug 13A is located in mold 12A and is located on same axis with mold 12A.Low punch
14A is cylindrical, is embedded between mold 12A and plug 13A with freely vertically moving from below.Upper punch 15A is cylindrical,
It is freely embedded between mold 12A and plug 13A up or down from top, is free to be taken out.In mold 12A, core
Correction unit 16A is formed between stick 13A and low punch 14A.By grinding, cutting and electric discharge, on the inner peripheral surface 17A of mold 12A
Form partes glabra 31.In this example embodiment, the length of partes glabra 31 is shorter than the length of bearing body 1.Partes glabra 31, which is arranged on, compares mold
Position upper correction unit 16A in 12A.Smooth 31 arranges multiple recess portions 32 along its length.In recess portion 32,32
Between formed protrusion 33, the front end of protrusion 33 is formed as the diameter identical with inner peripheral surface 17A.The depth H A of recess portion 32 is about
0.01mm, the bottom of recess portion 32 and the length LA of protrusion 33 are about 0.1mm.The depth H A of recess portion 32 and the height phase of protrusion 33
Together.As shown in figure 5, bearing body 1 is placed in correction unit 16A, and by using upper punch 15A and low punch 14A in school
Bearing body 1 is compressed to correct bearing body 1 in positive portion 16A.In addition, in next process, mould is risen to making upper punch 15A
Have 12A top, by make low punch 14A rise by bearing body 1 from mold 12A release in the case of, by smoothing this
It is than in the correction unit 16A forming portions 31 in the inner peripheral surface 17A of mold 12A.That, in correction unit in more than one upside
In 16A, bearing main body 2 is compressed and is corrected, and peripheral surface passes through multiple protrusions 33 and recess portion 32 and the inner circumferential of emitting side
34 grinding bearing body 1 of deburring portion between the 17A of face.Its fragment and fragment are put into vacancy 8, thus fill vacancy 8. this
In the case of, the inner peripheral surface 17A between concave portion 32 and inner periphery protrudes the table of part 33 and marginal portion 34 in emitting side
Face 17A has identical diameter.But the bearing body 1 caused by the Compression Correction of the bearing body 1 in correction unit 16A
Rebound, the peripheral surface 7 of the bearing body 1 between protrusion 33 and deburring portion 34 slide, 8 quilt of bearing on the peripheral surface 7 of bearing body 1
Filling.Fig. 6 shows the binary picture of the amplification picture in the peripheral surface 7 of bearing 1 " unprocessed ", wherein when being formed simultaneously
Gap 8 is not crushed when correcting bearing, and bearing 1 " passing through processing " is when bearing 1 is formed and timing, vacancy 8 are crushed.
No.1 represents the bianry image for the bearing 1 that density is 6.7g/cm3, and No.2 represents the two of the bearing 1 that density is 6.9g/cm3
It is worth image, No.3 represents the bianry image 1 of bearing, and density is 7.1 g/cm3.As a result it is obvious that the axis of " processing " in Fig. 1
Hold 1 " in, surface vacancy rate substantially reduces.Fig. 7 represents an example of the mounting structure of bearing 1.The installation of bearing 1 is installed
Portion 41 is arranged on metallic plate or plastic housing etc., and inner circumferential surface attachment part 41 is in polygonal in form.At this
In example, it is hexagonal.Later, bearing 1 is fitted and fixed with by being pressed into.Bearing 1 is designated as six positions, therefore axis
1 center is held to be easier than the bearing of the attachment part with cylindrical shape.On the other hand, there is the peripheral surface 7 in bearing I
Gap is led to the problem of between the inner peripheral surface of the method for the above-mentioned 41.Using in coupling part, surface vacancy rate is set to 10%
Or it is less, in the present invention preferably 5% or less.Therefore, it is possible to prevent lubricating oil from being leaked from the peripheral surface 7 of bearing body 1, and
It can keep the oil pressure of sliding surface 4.Embodiment is corresponding with the 1st aspect of the present invention, and impregnation sintering bearing 1 includes bearing
It is made body of the porous sintered alloy containing hole 8, and has there are one bearing hole 3, and a rotary shaft 9 is inserted.At this
In embodiment, since the gap 8 opened up on the peripheral surface 7 of bearing body 1 is crushed, so lubricating oil can be prevented from bearing
1 peripheral surface 7 leaks out, the oil pressure in bearing hole therefore, even if it cannot be guaranteed that be packed into bearing 1 connecting component circularity, also can
Prevent lubricating oil from being leaked from peripheral surface 7.In addition, the embodiment corresponds to second due to gap 8 is subject to crushing on peripheral surface 7 portion
The surface vacancy rate divided is for 10% hereinafter, so being reliably prevented from leakage of the lubricating oil from peripheral surface 7.
Embodiment corresponds to the third aspect of the present invention, and the wherein manufacturing method of sintered metal bearing 1 is included by raw material
Powder forms green compact P, and sintering green compact form the porous sintering alloy containing emptying aperture 8, what is be made of sintered alloy as P
The bearing hole 3 for being inserted into rotary shaft 9 is formed on bearing body 1.
In the present embodiment, since the emptying aperture 8 of the peripheral surface opening in powder compact P is pulverized, so powder compact P's
Under state, by crushing gap 8, bigger emptying aperture 8 can be filled.Therefore, even if the peripheral surface 7 of bearing 1 is cylindrical shape,
It cannot ensure to be built-in with the circularity of the mounting portion of bearing, therefore the oil pressure in bearing hole can be remained to relatively low oil-impregnated sintered
1 embodiment of bearing corresponds to the fourth aspect of the present invention, wherein, the manufacturing method of sintered metal bearing includes：By raw material powder
End forms green compact P, and sintering green compact P includes vacancy 8 to form porous sintered alloy, corrects sintered alloy and after by correcting
The bearing body 1 that is made of sintered alloy in form the bearing hole that can be inserted into rotary shaft 9.
In the present embodiment, the vacancy 8 being open on the peripheral surface of sintered alloy is destroyed when correcting sintered alloy, institute
It, can the smaller emptying aperture 8 of packing ratio by crushing vacancy 8 in the state of sintered sintered alloy.Due in this way in bearing 1
Peripheral surface 7 on the gap 8 that opens up be crushed, so can prevent lubricating oil from being leaked from peripheral surface 7, be able to maintain that in bearing hole
Oil pressure.Therefore, even if the peripheral surface of bearing 1 is cylindrical shape, can not ensure to be built-in with the circularity of the mounting portion of bearing 1, institute
Hole 3 can be obtained with the oil-impregnated sintered bearing 1 that can keep the oil pressure in bearing.In addition, the present embodiment corresponds to the present invention's
Be open on the outer periphery surface of green compact P of 5th aspect, the wherein vacancy 8 on outer periphery surface 7 is crushed.In present embodiment
In, first, by crushing the vacancy 8 in the state of formed body P, relatively large vacancy 8 can be filled.Then, as passing through
The other preferred steps in the vacancy 8 under sintered sintered alloy state are crushed, relatively small 8. conduct of vacancy can be filled
The effect of the present embodiment, vacancy 8 can be crushed without increasing manufacturing step, because when green compact P or bearing body 1 are pushed out mold
When, the hollow part 8 of the green compact P as additional preferred steps can be crushed 11 or 11A.For with it is used in embodiment 1
The identical component of component gives identical symbol, and omits detailed description.In the present embodiment, space part 8 is in periphery
A part of region in face 7 is crushed.The circumferential gap 8 in the half cycle region of peripheral surface 7 is filled.If in shaping dies 11
At the half of the inner peripheral surface 17 of mold 12, the vacancy 8 on the peripheral surface 7 of shaping dies 11 is crushed, then jog 21 is formed.
If in the additional preferred step that 8 periphery surface 7 of vacancy in outside is crushed after being sintered in sintered alloy 2, partes glabra
Divide at the half of the inner peripheral surface 17 of the 31 mold 12A for being formed in Correction Die 11A.The idle running rates of surface v in this case
It is the dimension scale in the vacancy 8 on the half cycle region of peripheral surface 7 i.e. region R.In addition, the half of the sliding surface 4 of bearing hole 3
Vacancy 8 is crushed with the have vacant position 8 identical side in part of filling on peripheral surface 7.
In the oil-impregnated sintered bearing I of present embodiment, filling have vacant position 8 region R be set at downside.It is in this way, logical
It crosses and flattens the vacancy 8 on sliding surface 4, the lubricating oil on sliding surface 4 will not be leaked into bearing 1.It is filled on sliding surface 4
The region in vacancy 8 forms fine and close pasta, so can be ensured that the smoothly rotation of rotary shaft.In addition, with previous lubricating oil
Easily from the situation of bottom leakage difference, even if the region R filled with gap 8 is arranged on bottom side on peripheral surface 7, because of region
Vacancy 8 in R is crushed, so lubricating oil will not leak from here.In addition, due on peripheral surface 7 filling have vacant position 8 area
Domain R can be distinguished in appearance, so can be using the region R that vacancy 8 is filled on peripheral surface 7 as confirming axis
1 is held to be combined together with mounting portion 41.
Claims (7)
1. a kind of sintered metal bearing uses powdered metallurgical material, which is characterized in that oiliness bearing powder metallurgy material
Material includes the ingredient of following weight：
Ti0.5wt%-2.0wt%、
Mo0.4wt%-1.0wt%、
Cs0.2wt%-0.6wt%、
Zr0.4wt%-1.0wt%、
Nb0.2wt%-0.5wt%、
Tc0.1wt%-0.4wt%、
Hf0.1wt%-0.3wt%、
Rh0.1wt%-0.3wt%、
Cu1wt%-1.5wt%、
Sn0.5wt%-1.0wt%、
Zn0.5wt%-1.0wt%、
Surplus is Fe.
2. a kind of manufacture craft of sintered metal bearing according to claim 1, which includes using molding die
（11）The step of formed body is formed by raw material powder：It is characterized in that, by from the shaping dies（11）Release the forming
Mold and the gap extrusion forming being open on the peripheral surface of the shaping dies is released into obtained powder compact P, will be described in it
Wherein powder compact P sintering bearing body is made（1）, sintered bearing body（1）Emptying aperture is crushed in the state of sintered alloy, it will
Shaping dies described in it includes mold（12）, plug（13）, low punch（14）And upper punch（15）；With cylindrical shape
Plug（13）Coaxially it is placed on mold（12）In；Low punch（14）Cylindrical tubulose, and coordinate in this way
Mold（12）And plug（13）Between so that low punch（14）It can freely up and down move;Upper punch（15）Cylindrical tubulose,
And with upper punch（15）The mode that can freely up and down move is assemblied in punch die（12）And plug（13）Between, with mold（12）
Separation;In plug（13）Outer surface, mold（12）Inner peripheral surface, low punch（14）Upper and lower surface on formed and fill out
Fill part（16）Upper punch（15）；In mold（12）Inner peripheral surface on form jog（21）；In mold（12）Longitudinal direction
Upper formation jog（21）The length in region be substantially equal to the length or longer of green compact；In jog（21）And shaping dies
（11）Green compact extrude mouth between mold（12）Inner peripheral surface（17）It is mirror finish；And the shape on the peripheral surface of crude green body
Into protrusion in crude green body and mold（12）Mirror-like polished surface on be squeezed through molding die（11）Powder compact P leave
Opening.
3. a kind of manufacture craft of sintered metal bearing according to claim 2, it is characterised in that：Mold（12）Inner circumferential
Face forms the peripheral surface of powder compact P（7）, low punch（14）Upper surface form one end face（6）, upper punch（15）Downside
Form its another end face, and plug（13）Peripheral surface form its slidingsurface（4）, by grinding, cutting and electric discharge, mould
Tool（12）Inner peripheral surface（17）.
4. jog（21）Length it is identical with the length of the powder compact P of bearing body or compared with jog（21）Throughout complete cycle landform
Into.
5. a kind of manufacture craft of sintered metal bearing according to claim 3, it is characterised in that：Mold（12）Inner circumferential
Face（17）Mirror image shape is finish-machined to by mirror-like, the depth H of inner peripheral end thereof is about 0 0.01mm, preferably 0.001
0.003；At least compare jog（21）Upper inner peripheral surface（17）In mirror image forms.
6. a kind of manufacture craft of sintered metal bearing according to claim 4, it is characterised in that：Filling part（16）Filling
There is raw material powder M, use upper punch（15）And low punch（14）To filling part（16）Interior raw material powder M carries out punching press and is formed
Powder compact P, then, upper punch（15）Rise to mold（12）Top, by making low punch（14）Rise and will strike out
Shape product P is from punch die（12）In the case of release, the peripheral surface of formed body P（7）On emptying aperture（8）By jog（21）It is formed in mould
Tool（12）Inner peripheral surface（17）On, inner peripheral surface（17）Be formed as mirror-like, and compare jog（21）It is upper, that is, in filling part
（16）In, in the peripheral surface of powder compact P（7）Upper graphic arts die（12）Jog（21）, due to jog（21）Positioned in mirror
As the inner peripheral surface of shape（17）Radial outside.
7. a kind of manufacture craft of sintered metal bearing according to claim 2-5, it is characterised in that：The bearing body
（1）Again it is corrected to scheduled size.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114901449A (en) * | 2020-01-31 | 2022-08-12 | 大冶美有限公司 | Embedded sintered part and method for manufacturing same |
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Application publication date: 20180608 |