CN110394401A - A kind of shaping methods and shaping mould of high-carbon chromium steel thin-wall bearing ferrule - Google Patents
A kind of shaping methods and shaping mould of high-carbon chromium steel thin-wall bearing ferrule Download PDFInfo
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- CN110394401A CN110394401A CN201910808074.0A CN201910808074A CN110394401A CN 110394401 A CN110394401 A CN 110394401A CN 201910808074 A CN201910808074 A CN 201910808074A CN 110394401 A CN110394401 A CN 110394401A
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- Prior art keywords
- shaping
- bearing ring
- lower die
- bearing
- mould
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/10—Making other particular articles parts of bearings; sleeves; valve seats or the like
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
A kind of shaping methods and shaping mould of high-carbon chromium steel thin-wall bearing ferrule, including preparing shaping mould, quenching, shaping and tempering, under the premise of guaranteeing thin-wall bearing ferrule service performance, solve thin-wall bearing ferrule radial non-round deformation and hold to buckling deformation, substantially increase the qualification rate of shaping.Shaping mould in the present invention includes upper die and lower die, the opposite end of upper die and lower die is equipped with opposite coaxial male cone (strobilus masculinus), the bearing ring between upper die and lower die, wherein, the upper end of bearing ring inner headed face and upper mold axial contact, the lower end of bearing ring inner headed face and lower die axial contact.The present invention take into account thin-wall bearing ferrule radial shaping and hold to shaping, greatly improve production efficiency.The features such as shaping mould of the invention is simple and convenient to operate with structure, and shaping effect is obvious, shaping methods of the invention are high, high-efficient using qualification rate, are suitble to large-scale promotion and application.
Description
Technical field
The present invention relates to technical field of bearings, a kind of shaping methods more particularly, to high-carbon chromium steel thin-wall bearing ferrule and
Shaping mould.
Background technique
High-carbon-chromium bearing steel belongs to common bearing steel, and with the rapid development of bearing industry, bearing arrangement is than before more
Add complexity, and a large amount of thin-wall bearing ferrules occurs.Bearing ring is during heat treatment due to thermal stress, structural transformation etc.
Factor inevitably generates heat-treatment distortion, and the heat-treatment distortion of thin-wall bearing ferrule is particularly acute, and deformation rate is intimate
100%, and the superscale deformed is up to 200%-300%.The problem on deformation of thin-wall bearing ferrule seriously constrains such bearing holder (housing, cover)
The heat treatment of circle and subsequent mill process.
The heat-treatment distortion of thin-wall bearing ferrule be divided into radial non-round deformation and hold to buckling deformation.Application No. is
The patent of CN200610128223.1 discloses a kind of method that heat-treatment distortion is prevented by shaping holder, and this method can
To effectively prevent bearing ring non-round deformation in the radial direction, it can not prevent bearing ring from holding upward buckling deformation.Application
Number a kind of solution bearing ring is disclosed in the method for holding upturned deformation for the patent of CN201810181069.7, still,
Bearing ring not can solve equally in radial non-round deformation.
The mode for solving thin-wall bearing ferrule heat-treatment distortion in the prior art, usually passes through plate side pressure bearing holder (housing, cover)
Circle, the upward warpage in correction bearing ring end, then carries out radial non-round shaping to thin-wall bearing ferrule again, corrects circularity.
This kind of method is more demanding to Personnel Skill Levels, ensure that end to buckling deformation, not can guarantee radial non-round deformation but,
It is difficult to accomplish that two kinds are taken into account, therefore, existing trimming not only inefficiency, and the qualification rate processed is less than 60%, it is serious to make
The about production of thin-wall bearing.
Summary of the invention
In order to overcome the shortcomings in the background art, the invention discloses a kind of shaping sides of high-carbon chromium steel thin-wall bearing ferrule
Method and shaping mould, its object is to: under the premise of guaranteeing thin-wall bearing ferrule service performance, solves thin-wall bearing ferrule and exist
Radial non-round deformation and hold to buckling deformation, improve the qualification rate and production efficiency of shaping.
For achieving the above object, the present invention adopts the following technical scheme:
A kind of shaping methods of high-carbon chromium steel thin-wall bearing ferrule, comprising the following steps:
Step 1: preparing shaping mould: according to the outer dimension of bearing ring, design, production shaping mould；
Step 2: quenching: bearing ring being heated to 820 DEG C~840 DEG C, keeps the temperature 50~60min, oil quenchinng, oil outlet temperature
Control is at 100~140 DEG C；
Step 3: shaping: in the 20s time after quenching, quenched bearing ring being placed in shaping mould, and is passed through
Pressurized equipment carries out shaping to bearing ring；
Step 4: tempering: in the 1h time after shaping, the bearing ring after shaping is put into tempering furnace and is tempered, tempering temperature
170 DEG C of degree, tempering time 4-4.5h；
Step 5: detection.
Preferably, the pressurized equipment is hydraulic press or hand press.
A kind of shaping mould for implementing shaping methods, including upper die and lower die, the opposite end of upper die and lower die are equipped with relatively
Coaxial male cone (strobilus masculinus), the bearing ring is between upper die and lower die, wherein the upper end of bearing ring inner headed face and upper mold are same
Axis contact, the lower end of bearing ring inner headed face and lower die axial contact.
Further improved technology scheme, the cone angle of the upper die and lower die male cone (strobilus masculinus) is between 120 ° -150 °.
Due to the adoption of the above technical scheme, background technique is compared, the invention has the following beneficial effects:
The present invention, by shaping mould and its shaping methods, solves under the premise of guaranteeing thin-wall bearing ferrule service performance
Thin-wall bearing ferrule radial non-round deformation and hold to buckling deformation, substantially increase the qualification rate of shaping, qualification rate by
Former shaping aspect less than 60%, improve to the 100% of existing shaping aspect.
The present invention combine thin-wall bearing ferrule radial shaping and hold to shaping given birth to compared to former shaping aspect
Efficiency is produced to greatly improve.
The features such as shaping mould of the invention is simple and convenient to operate with structure, and shaping effect is obvious；Shaping of the invention
Method is high, high-efficient using qualification rate, is suitble to large-scale promotion and application.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of shaping mould in the present invention.
In figure: 1, upper mold；2, bearing ring；3, lower die.
Specific embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining technical principle of the invention, it is not intended that limit the scope of the invention.It needs to illustrate
, in the description of the present invention, term " on ", "lower", the direction of instruction or positional relationship term be based on shown in attached drawing
Direction or positional relationship, this is intended merely to facilitate description, rather than indication or suggestion described device or element must have
Specific orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
A kind of shaping mould for implementing shaping methods, as shown in Figure 1, including upper mold 1 and lower die 3, the phase of upper mold 1, lower die 3
Opposite end is equipped with opposite coaxial male cone (strobilus masculinus), and the bearing ring 2 is between upper mold 1, lower die 3, wherein in bearing ring 2
The upper end of disc and 1 axial contact of upper mold, the lower end of 2 inner headed face of bearing ring and 3 axial contact of lower die.
When work, upper mold 1 is moved downward, and coaxially presses to lower die 3, due to upper mold 1, lower die 3 male cone (strobilus masculinus) to bearing ring 2
Have the function of correcting, can make bearing ring 2 and upper mold 1, lower die 3 coaxial automatically.Bearing ring 2 and upper mold 1, lower die 3 are coaxial,
So that upper mold 1, lower die 3 and the contact line of 2 inner headed face upper and lower end of bearing ring are annulus.
This shaping mould is interior rounded corner bulging device, and the position of bulging is the interior rounded corner of bearing ring 2.Pressurized equipment
Apply bulging pressure towards the interior rounded corner of bearing ring 2 by the outer cone of upper mold 1, lower die 3, bulging pressure is simultaneously in bearing holder (housing, cover)
It the radial direction of circle 2 and holds to generating decomposition pressure, wherein radial decomposition pressure carries out the radial non-round deformation of bearing ring 2
Shaping, hold to decomposition pressure to 2 end of bearing ring to buckling deformation carry out shaping.
It is thin-wall bearing ferrule by bearing ring 2 in this present embodiment, holds to wall thickness is highly greater than, hold to height
Rigidity is also greater than radial rigidity, therefore, hold to decomposition pressure also critical path to decomposition pressure.For this purpose, the upper die and lower die
The cone angle of male cone (strobilus masculinus) between 120 ° -150 °, in this way, cause to hold to decomposition pressure be greater than radial decomposition pressure, make bearing
Lasso 2 end to decomposition pressure suffered by, radial direction in OK range so that bearing ring 2 end to, radial can obtain
Enough pressure causes excessive shape to change to shaping, and not because a direction pressure is excessive.For example, excessive cone angle
The anchor ring of bearing ring 2 can be made to become dolioform, the inner ring surface that too small cone angle will cause bearing ring 2 becomes inner conical.
In order to guarantee bearing ring 2 can shaping in place, when 2 inner headed face of bearing ring upper and lower end simultaneously with upper mold 1,
When 3 axial contact of lower die, the height of bearing ring 2 is greater than upper mold 1, the distance of 3 opposite end of lower die.
Below with reference to above-mentioned shaping mould, a kind of shaping methods of high-carbon chromium steel thin-wall bearing ferrule of the invention are carried out
Further instruction.
Embodiment 1:
Thin-wall bearing ferrule LY-7014/01, material: GCr15SiMn, outer diameter Φ 458mm, internal diameter Φ 448.5mm, height 48mm,
Wall thickness 5.0mm.It is required that: radial non-round deformation≤0.60mm, hold to buckling deformation≤0.60mm.Quantity 30.
It implements the steps of:
Step 1: making shaping mould according to shaping mould graphic technique.
Shaping mould manufactured size is as follows:
Upper mold 1,3 circular conical surface of lower die end diameter be Φ 390mm, 145 ° of cone angle, height 35mm.
Step 2: quenching: bearing ring being placed in rotary hearth furnace and is heated to 840 DEG C, heat preservation 60min is carried out without mould
Tool oil quenchinng, about 140 DEG C of oil outlet temperature.
Normal quenching technical guarantees that bearing ring reaches qualified performance indicator.
Step 3: shaping: in the 20s time after quenching, quenched bearing ring is placed in shaping mould, and
Shaping is carried out to bearing ring by pressurized equipment.
When shaping, borrows hydraulic press each bearing ring is individually placed in shaping mould and carry out shaping.It is quenching
In the 20s time after fire, bearing ring still has 130 DEG C or so of temperature, the temperature first is that the active force of shaping can be reduced,
Two contribute to reduce deformation of the bearing ring after shaping.
Step 4: tempering: in the 1h time after shaping, the bearing ring after shaping being put into tempering furnace and is tempered, returned
170 DEG C of fiery temperature, tempering time 4.5h.
Tempering release residual stress, the bearing ring dimensionally stable after making shaping.
Step 5: detection: the non-round deformation of bearing ring radial direction within 0.40mm, hold to buckling deformation in 0.35mm
Within be it is qualified, through detecting qualification rate 100%.
Embodiment 2:
Thin-wall bearing ferrule LY-7014/22, material: GCr15SiMn, outer diameter Φ 428.3mm, internal diameter Φ 412mm, height 24mm,
Wall thickness 8.0mm.It is required that: deformation≤0.50mm, warpage≤0.50mm.Quantity 30.
It implements the steps of:
Step 1: making shaping mould according to shaping mould graphic technique, shaping mould is the same as embodiment one.
Step 2: quenching: by bearing ring at 820 DEG C in rotary hearth furnace, keeping the temperature 50min, first carry out no Die Oil cold quenching
Fire, about 100 DEG C of oil outlet temperature.
Step 3: shaping: in the 10s time after quenching, quenched bearing ring is placed in shaping mould, and
Shaping is carried out to bearing ring by pressurized equipment.
When shaping, borrows hydraulic press each bearing ring is individually placed in shaping mould and carry out shaping.
Step 4: tempering: in the 0.5h time after shaping, the bearing ring after shaping is put into tempering furnace and is tempered,
170 DEG C of tempering temperature, tempering time 4h.
Step 5: detection: the non-round deformation of bearing ring radial direction within 0.40mm, hold to buckling deformation in 0.30mm
Within be it is qualified, through detecting qualification rate 100%.
Non- detailed portion is the prior art.Although an embodiment of the present invention has been shown and described, for this field
For those of ordinary skill, it is possible to understand that without departing from the principles and spirit of the present invention can to these embodiments into
The a variety of change, modification, replacement and modification of row, protection scope of the present invention are defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of shaping methods of high-carbon chromium steel thin-wall bearing ferrule, it is characterized in that: the following steps are included:
Step 1: preparing shaping mould: according to the outer dimension of bearing ring, design, production shaping mould；
Step 2: quenching: bearing ring being heated to 820 DEG C~840 DEG C, keeps the temperature 50~60min, oil quenchinng, oil outlet temperature
Control is at 100~140 DEG C；
Step 3: shaping: in the 20s time after quenching, quenched bearing ring being placed in shaping mould, and is passed through
Pressurized equipment carries out shaping to bearing ring；
Step 4: tempering: in the 1h time after shaping, the bearing ring after shaping is put into tempering furnace and is tempered, tempering temperature
170 DEG C of degree, tempering time 4-4.5h；
Step 5: detection.
2. a kind of shaping methods of high-carbon chromium steel thin-wall bearing ferrule as described in claim 1, it is characterized in that: the pressurization is set
Standby is hydraulic press or hand press.
3. a kind of shaping mould for implementing shaping methods claimed in claims 1-2, it is characterized in that: include upper die and lower die, on
Mould, lower die opposite end be equipped with opposite coaxial male cone (strobilus masculinus), the bearing ring is between upper die and lower die, wherein bearing
The upper end of lasso inner headed face and upper mold axial contact, the lower end of bearing ring inner headed face and lower die axial contact.
4. a kind of shaping mould as claimed in claim 3, it is characterized in that: the cone angle of the upper die and lower die male cone (strobilus masculinus) 120 °-
Between 150 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910808074.0A CN110394401A (en) | 2019-08-29 | 2019-08-29 | A kind of shaping methods and shaping mould of high-carbon chromium steel thin-wall bearing ferrule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910808074.0A CN110394401A (en) | 2019-08-29 | 2019-08-29 | A kind of shaping methods and shaping mould of high-carbon chromium steel thin-wall bearing ferrule |
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| Publication Number | Publication Date |
|---|---|
| CN110394401A true CN110394401A (en) | 2019-11-01 |
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| CN201910808074.0A Pending CN110394401A (en) | 2019-08-29 | 2019-08-29 | A kind of shaping methods and shaping mould of high-carbon chromium steel thin-wall bearing ferrule |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621540A (en) * | 2004-12-03 | 2005-06-01 | 瓦房店轴承集团有限责任公司 | Heat treating trimming method for large-scale bearing ring |
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| CN104070085A (en) * | 2013-03-25 | 2014-10-01 | 上海众源燃油分配器制造有限公司 | Tool for shaping base of oil sprayer |
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| CN104438845A (en) * | 2014-11-26 | 2015-03-25 | 北京航星机器制造有限公司 | Simple hot forming die and method for large inner hole flanging of high-strength titanium-alloy material |
| CN105506235A (en) * | 2015-12-15 | 2016-04-20 | 常熟市常轴轴承有限公司 | Heat treatment process of high carbon chromium bearing steel bearing ring |
| CN108251630A (en) * | 2018-02-27 | 2018-07-06 | 人本集团有限公司 | Frivolous bearing ring quenching heat treatment technique |
| CN108704950A (en) * | 2018-05-31 | 2018-10-26 | 北京航星机器制造有限公司 | A kind of hot-pressed mold of saddle-shape beam member and component forming method |
| CN108728628A (en) * | 2018-07-02 | 2018-11-02 | 洛阳Lyc轴承有限公司 | A kind of 9Cr18 steel large diameter thin wall bearing ring heat treatment method |
| CN108927417A (en) * | 2018-05-24 | 2018-12-04 | 北京航星机器制造有限公司 | The hot-pressed mold of abnormity depth chamber labyrinth bracket and manufacturing process |
| CN109877238A (en) * | 2019-03-29 | 2019-06-14 | 奥美森智能装备股份有限公司 | A kind of new-type double-headed pipe end processing unit (plant) |
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2019
- 2019-08-29 CN CN201910808074.0A patent/CN110394401A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1621540A (en) * | 2004-12-03 | 2005-06-01 | 瓦房店轴承集团有限责任公司 | Heat treating trimming method for large-scale bearing ring |
| CN104070085A (en) * | 2013-03-25 | 2014-10-01 | 上海众源燃油分配器制造有限公司 | Tool for shaping base of oil sprayer |
| CN203678941U (en) * | 2013-11-29 | 2014-07-02 | 海龙(张家港)实业有限公司 | Pipe orifice rounding machine |
| CN104438845A (en) * | 2014-11-26 | 2015-03-25 | 北京航星机器制造有限公司 | Simple hot forming die and method for large inner hole flanging of high-strength titanium-alloy material |
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| CN108251630A (en) * | 2018-02-27 | 2018-07-06 | 人本集团有限公司 | Frivolous bearing ring quenching heat treatment technique |
| CN108927417A (en) * | 2018-05-24 | 2018-12-04 | 北京航星机器制造有限公司 | The hot-pressed mold of abnormity depth chamber labyrinth bracket and manufacturing process |
| CN108704950A (en) * | 2018-05-31 | 2018-10-26 | 北京航星机器制造有限公司 | A kind of hot-pressed mold of saddle-shape beam member and component forming method |
| CN108728628A (en) * | 2018-07-02 | 2018-11-02 | 洛阳Lyc轴承有限公司 | A kind of 9Cr18 steel large diameter thin wall bearing ring heat treatment method |
| CN109877238A (en) * | 2019-03-29 | 2019-06-14 | 奥美森智能装备股份有限公司 | A kind of new-type double-headed pipe end processing unit (plant) |
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Application publication date: 20191101 |
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