CN110497640A - A kind of PTFE based composites bearing shell cold compression molding method - Google Patents
A kind of PTFE based composites bearing shell cold compression molding method Download PDFInfo
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- CN110497640A CN110497640A CN201910696625.9A CN201910696625A CN110497640A CN 110497640 A CN110497640 A CN 110497640A CN 201910696625 A CN201910696625 A CN 201910696625A CN 110497640 A CN110497640 A CN 110497640A
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- Prior art keywords
- bearing shell
- ptfe
- based composites
- compression molding
- molding method
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D33/00—Producing bushes for bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- 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
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/201—Composition of the plastic
-
- 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
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/208—Methods of manufacture, e.g. shaping, applying coatings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of PTFE based composites bearing shell cold compression molding methods, are related to PTFE based composites bearing shell technical field, including following six step.The present invention passes through rolling processing and smart car processing, the surface processing of high quality is carried out to bearing shell, substantially increase the surface flatness of bearing shell, and rolling handles while also improving the hardness and strength of bearing shell, improve the mechanical performance of bearing shell, bearing shell is carried out to eliminate internal stress processing using infrared lamp or convection oven, obtains more stable and reliable PTFE based composites bearing shell.
Description
Technical field
The present invention relates to PTFE based composites bearing shell technical field, in particular to a kind of PTFE based composites bearing shell is cold
Transfer moulding method.
Background technique
Bearing shell (bearing shell) is the part of sliding bearing and journal contact, and shape is the semi-cylindrical of tiles.
PTFE based composites bearing shell is PTFE-based composites bearing shell, and polytetrafluoroethylene (PTFE) has resistant to high temperature
Feature, its coefficient of friction is extremely low, therefore PTFE based composites bearing shell is also widely used, and existing PTFE base is multiple
Condensation material bearing shell is lower in the bearing shell mechanical strength that processing method obtains, and bearing shell surface is not smooth enough, and the bearing shell processed is inadequate
It is reliable and stable.
Therefore, it is necessary to solve the above problems to invent a kind of PTFE based composites bearing shell cold compression molding method.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, it the present invention provides a kind of PTFE based composites bearing shell cold compression molding method, solves
The problem of being proposed in background technique.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: a kind of PTFE based composites bearing shell cold pressing
Forming method, comprising the following steps:
A: the thermoplasticity PTFE compound material that will have been prepared is placed in the die cavity in cold pressing punch die, is applied height and is pressed into closely knit mould
Green compact material is made PTFE composite blank, then the PTFE composite blank being cold-pressed is ejected and removed from mould hoop；
B: obtained PTFE composite blank is passed through into multi- pass rolling, obtains PTFE composite band；
C: PTFE composite band is put into roll unit, and roll unit work carries out at surface rolling processing PTFE composite band
Reason；
D: PTFE composite band will be placed in bending die after rolling is handled and bend to semicircle, and just shape bearing shell is made, bends to
Pattern includes lower cavity die and upper die；
E: first shape bearing shell is fixed on lathe, then the inner headed face of finishing processing workpiece, periphery and both ends of the surface, essence cut speed
It is 270~290 ms/min；
F: stress processing is carried out to first shape bearing shell using stress elimination equipment, stress elimination equipment is that infrared lamp or air blast are dried
Case eliminates the stress in it, and temperature is 50~60 DEG C, finally obtains PTFE based composites bearing shell.
Optionally, the dwell time is 3~5min in the step A.
Optionally, it is 6~14 that road number is rolled in the step B；
Rolling temperature is 25~30 DEG C in the step B.
Optionally, rolling speed is 100~130r/s in the step C；
Roller surface roughness value is Ra0.3~0.2 μm in the step C.
Optionally, mold temperature is 60~80 DEG C in the step D.
Optionally, lower cavity die and upper die are all made of T10A steel and are made in the step D；
It hardens in the step D for 59~64HRC.
Optionally, the precision processed in the step E is 7~9 grades.
Optionally, it is 2.5~3.5h that the time is handled in the step F.
(3) beneficial effect
The present invention provides a kind of PTFE based composites bearing shell cold compression molding method, have it is following the utility model has the advantages that
(1), by rolling processing and smart car processing, the surface for carrying out high quality to bearing shell processes the present invention, substantially increases axis
Watt surface flatness, and roll processing and meanwhile also improve the hardness and strength of bearing shell, improve the mechanical performance of bearing shell.
(2), the present invention carries out bearing shell to eliminate internal stress processing using infrared lamp or convection oven, obtains more stable
And reliable PTFE based composites bearing shell.
(3), strong operability of the present invention has good society generalization application.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment 1:
A kind of PTFE based composites bearing shell cold compression molding method, comprising the following steps:
A: the thermoplasticity PTFE composite plate material that will have been prepared is placed in the die cavity in cold pressing punch die, and application height is pressed into closely knit
Molded blank, dwell time 3min are made PTFE composite blank, then the PTFE composite blank being cold-pressed are ejected from mould hoop
And it removes；
B: passing through multi- pass rolling for obtained PTFE composite blank, and rolling road number is 6, and rolling temperature is 25 DEG C, is obtained
PTFE composite band；
C: PTFE composite band is put into roll unit, and roll unit work carries out at surface rolling processing PTFE composite band
Reason, rolling speed 100r/s, roller surface roughness value are Ra0.3 μm；
D: PTFE composite band will be placed in bending die after rolling is handled and bend to semicircle, and mold temperature is 60 DEG C, be made
First shape bearing shell, bending and forming die includes lower cavity die and upper die, and lower cavity die and upper die are all made of T10A steel and are made, harden for
59HRC；
E: first shape bearing shell is fixed on lathe, then the inner headed face of finishing processing workpiece, periphery and both ends of the surface, essence cut speed
It is 270 ms/min, the precision of processing is 7 grades；
F: stress processing is carried out to first shape bearing shell using stress elimination equipment, stress elimination equipment is that infrared lamp or air blast are dried
Case eliminates the stress in it, and temperature is 50 DEG C, and the processing time is 2.5h, finally obtains PTFE based composites bearing shell.
Embodiment 2:
A kind of PTFE based composites bearing shell cold compression molding method, comprising the following steps:
A: the thermoplasticity PTFE composite plate material that will have been prepared is placed in the die cavity in cold pressing punch die, and application height is pressed into closely knit
Molded blank, dwell time 4min are made PTFE composite blank, then the PTFE composite blank being cold-pressed are ejected from mould hoop
And it removes；
B: passing through multi- pass rolling for obtained PTFE composite blank, rolls road Shuo Wei 11, and rolling temperature is 28 DEG C, obtains
PTFE composite band；
C: PTFE composite band is put into roll unit, and roll unit work carries out at surface rolling processing PTFE composite band
Reason, rolling speed 120r/s, roller surface roughness value are Ra0.2 μm；
D: PTFE composite band will be placed in bending die after rolling is handled and bend to semicircle, and mold temperature is 70 DEG C, be made
First shape bearing shell, bending and forming die includes lower cavity die and upper die, and lower cavity die and upper die are all made of T10A steel and are made, harden for
64HRC；
E: first shape bearing shell is fixed on lathe, then the inner headed face of finishing processing workpiece, periphery and both ends of the surface, essence cut speed
It is 280 ms/min, the precision of processing is 9 grades；
F: stress processing is carried out to first shape bearing shell using stress elimination equipment, stress elimination equipment is that infrared lamp or air blast are dried
Case eliminates the stress in it, and temperature is 55 DEG C, and the processing time is 3h, finally obtains PTFE based composites bearing shell.
Embodiment 3:
A kind of PTFE based composites bearing shell cold compression molding method, comprising the following steps:
A: the thermoplasticity PTFE composite plate material that will have been prepared is placed in the die cavity in cold pressing punch die, and application height is pressed into closely knit
Molded blank, dwell time 5min are made PTFE composite blank, then the PTFE composite blank being cold-pressed are ejected from mould hoop
And it removes；
B: passing through multi- pass rolling for obtained PTFE composite blank, rolls road Shuo Wei 14, and rolling temperature is 30 DEG C, obtains
PTFE composite band；
C: PTFE composite band is put into roll unit, and roll unit work carries out at surface rolling processing PTFE composite band
Reason, rolling speed 130r/s, roller surface roughness value are Ra0.25 μm；
D: PTFE composite band will be placed in bending die after rolling is handled and bend to semicircle, and mold temperature is 80 DEG C, be made
First shape bearing shell, bending and forming die includes lower cavity die and upper die, and lower cavity die and upper die are all made of T10A steel and are made, harden for
60HRC；
E: first shape bearing shell is fixed on lathe, then the inner headed face of finishing processing workpiece, periphery and both ends of the surface, essence cut speed
It is 290 ms/min, the precision of processing is 8 grades；
F: stress processing is carried out to first shape bearing shell using stress elimination equipment, stress elimination equipment is that infrared lamp or air blast are dried
Case eliminates the stress in it, and temperature is 60 DEG C, and the processing time is 3.5h, finally obtains PTFE based composites bearing shell.
By above three groups of embodiments can cold moudling obtain bearing shell, wherein the bearing shell effect that second group of embodiment obtains
Preferably, it is handled by rolling processing and smart car, the surface for carrying out high quality to bearing shell processes, and substantially increases the surface light of bearing shell
Slippery, and roll processing while also improving the hardness and strength of bearing shell, the mechanical performance of bearing shell is improved, using infrared lamp
Or convection oven carries out bearing shell to eliminate internal stress processing, obtains more stable and reliable PTFE based composites bearing shell.
It should be noted that in the present invention unless specifically defined or limited otherwise, fisrt feature is in second feature
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact "up" or "down".
Moreover, fisrt feature can be above the second feature " above ", " above " and " above " fisrt feature right above second feature or tiltedly
Top, or first feature horizontal height is merely representative of higher than second feature.Fisrt feature second feature " under ", " lower section " and
" following " can be fisrt feature and be directly under or diagonally below the second feature, or be merely representative of first feature horizontal height less than
Two features.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (8)
1. a kind of PTFE based composites bearing shell cold compression molding method, which comprises the following steps:
A: the thermoplasticity PTFE compound material that will have been prepared is placed in the die cavity in cold pressing punch die, is applied height and is pressed into closely knit mould
Green compact material is made PTFE composite blank, then the PTFE composite blank being cold-pressed is ejected and removed from mould hoop；
B: obtained PTFE composite blank is passed through into multi- pass rolling, obtains PTFE composite band；
C: PTFE composite band is put into roll unit, and roll unit work carries out at surface rolling processing PTFE composite band
Reason；
D: PTFE composite band will be placed in bending die after rolling is handled and bend to semicircle, and just shape bearing shell is made, bends to
Pattern includes lower cavity die and upper die；
E: first shape bearing shell is fixed on lathe, then the inner headed face of finishing processing workpiece, periphery and both ends of the surface, essence cut speed
It is 270~290 ms/min；
F: stress processing is carried out to first shape bearing shell using stress elimination equipment, stress elimination equipment is that infrared lamp or air blast are dried
Case eliminates the stress in it, and temperature is 50~60 DEG C, finally obtains PTFE based composites bearing shell.
2. a kind of PTFE based composites bearing shell cold compression molding method according to claim 1, it is characterised in that:
The dwell time is 3~5min in the step A.
3. a kind of PTFE based composites bearing shell cold compression molding method according to claim 1, it is characterised in that:
It is 6~14 that road number is rolled in the step B；
Rolling temperature is 25~30 DEG C in the step B.
4. a kind of PTFE based composites bearing shell cold compression molding method according to claim 1, it is characterised in that:
Rolling speed is 100~130r/s in the step C；
Roller surface roughness value is Ra0.3~0.2 μm in the step C.
5. a kind of PTFE based composites bearing shell cold compression molding method according to claim 1, it is characterised in that:
Mold temperature is 60~80 DEG C in the step D.
6. a kind of PTFE based composites bearing shell cold compression molding method according to claim 1, it is characterised in that:
Lower cavity die and upper die are all made of T10A steel and are made in the step D；
It hardens in the step D for 59~64HRC.
7. a kind of PTFE based composites bearing shell cold compression molding method according to claim 1, it is characterised in that:
The precision processed in the step E is 7~9 grades.
8. a kind of PTFE based composites bearing shell cold compression molding method according to claim 1, it is characterised in that:
It is 2.5~3.5h that the time is handled in the step F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696625.9A CN110497640A (en) | 2019-07-30 | 2019-07-30 | A kind of PTFE based composites bearing shell cold compression molding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696625.9A CN110497640A (en) | 2019-07-30 | 2019-07-30 | A kind of PTFE based composites bearing shell cold compression molding method |
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| CN110497640A true CN110497640A (en) | 2019-11-26 |
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ID=68587844
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| CN201910696625.9A Pending CN110497640A (en) | 2019-07-30 | 2019-07-30 | A kind of PTFE based composites bearing shell cold compression molding method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2132360A1 (en) * | 1971-06-29 | 1973-01-11 | Dow Corning Gmbh | Self-lubricating bearing materials - contg polyfluoralkylene particles and inorganic lubricants in epoxy resins |
| CN1967001A (en) * | 2005-11-18 | 2007-05-23 | 孙守驯 | Elastic metal-plastic bearing made of fluoroplastic and polyphenyl ester |
| CN107747592A (en) * | 2017-10-25 | 2018-03-02 | 郑州机械研究所 | A kind of copper-based bearing shell with toughness reinforcing intermediate layer and preparation method thereof |
| CN107838638A (en) * | 2017-11-03 | 2018-03-27 | 重庆跃进机械厂有限公司 | A kind of large thin-wall bearing shell Anti-deformation forming method |
| CN108644233A (en) * | 2018-04-28 | 2018-10-12 | 天津大学 | A kind of full working scope high abrasion sliding bearing and preparation method thereof |
| CN109676126A (en) * | 2019-01-24 | 2019-04-26 | 西安交通大学 | A kind of preparation method of copper-base graphite wear-resistant engine bearing shell |
-
2019
- 2019-07-30 CN CN201910696625.9A patent/CN110497640A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2132360A1 (en) * | 1971-06-29 | 1973-01-11 | Dow Corning Gmbh | Self-lubricating bearing materials - contg polyfluoralkylene particles and inorganic lubricants in epoxy resins |
| CN1967001A (en) * | 2005-11-18 | 2007-05-23 | 孙守驯 | Elastic metal-plastic bearing made of fluoroplastic and polyphenyl ester |
| CN107747592A (en) * | 2017-10-25 | 2018-03-02 | 郑州机械研究所 | A kind of copper-based bearing shell with toughness reinforcing intermediate layer and preparation method thereof |
| CN107838638A (en) * | 2017-11-03 | 2018-03-27 | 重庆跃进机械厂有限公司 | A kind of large thin-wall bearing shell Anti-deformation forming method |
| CN108644233A (en) * | 2018-04-28 | 2018-10-12 | 天津大学 | A kind of full working scope high abrasion sliding bearing and preparation method thereof |
| CN109676126A (en) * | 2019-01-24 | 2019-04-26 | 西安交通大学 | A kind of preparation method of copper-base graphite wear-resistant engine bearing shell |
Non-Patent Citations (1)
| Title |
|---|
| 诸全兴: "《简明车工手册》", 31 March 2007 * |
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Application publication date: 20191126 |