CN110328295B - Steel-to-PTFE fabric self-lubricating rod end joint bearing and manufacturing method thereof - Google Patents
Steel-to-PTFE fabric self-lubricating rod end joint bearing and manufacturing method thereof Download PDFInfo
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- CN110328295B CN110328295B CN201910660294.3A CN201910660294A CN110328295B CN 110328295 B CN110328295 B CN 110328295B CN 201910660294 A CN201910660294 A CN 201910660294A CN 110328295 B CN110328295 B CN 110328295B
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- 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
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- 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
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- Sliding-Contact Bearings (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a steel-to-PTFE fabric self-lubricating rod end joint bearing and a manufacturing method thereof, wherein a material with a PTFE self-lubricating function is used for an extrusion type rod end joint bearing, a semi-extrusion process is adopted for extrusion, the maintenance-free effect of a product is realized through the self-lubricating property of a PTEF fabric, the service life of the product is prolonged, the steel-to-PTFE fabric self-lubricating rod end joint bearing is suitable for occasions with limited space, troublesome assembly and disassembly, inconvenient replacement, inconvenient lubrication and strong torque requirements, compared with an assembly type steel-to-PTFE fabric rod end joint bearing, the steel-to-PTFE fabric self-lubricating rod end joint bearing has the same service performance, a short processing and.
Description
Technical Field
The invention relates to a steel-to-PTFE fabric self-lubricating rod end joint bearing and a manufacturing method thereof.
Background
The existing steel-to-PTFE fabric self-lubricating rod end spherical plain bearing is assembled, and as shown in fig. 1, the manufacturing process comprises extruding a T-shaped radial spherical plain bearing 1 ' and a rod end body 2 ', and extruding the T-shaped radial spherical plain bearing (comprising an outer ring 3 ', an inner ring 4 ' and a gasket 5 '): turning an outer ring 3 ' → sandblasting an inner hole of the outer ring → blanking of a liner 5 ' → pasting → precuring → extruding (see fig. 2, extruding by using a group of extrusion dies 6 ') → curing → rough turning of an outer circle → play pretreatment → removing residual glue → turning of an end face → finish turning of an outer circle and end grooves → play finishing → finish turning of an outer circle, thereby obtaining the extruded T-shaped radial spherical plain bearing. Then the extrusion T-shaped radial spherical plain bearing 1 'is pressed into the eye hole of the rod end body 2' through a group of press-fit dies 7 'in the figure 3, and finally the extrusion T-shaped radial spherical plain bearing 1' is fixedly connected with the rod end body 2 'through a group of riveting dies 8' in the figure 4. The assembly step of the self-lubricating rod end joint bearing of the PTFE fabric by the assembly steel is complicated, and the cost is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a steel-to-PTFE fabric self-lubricating rod end joint bearing and a manufacturing method thereof.
The first technical scheme adopted by the invention for solving the technical problems is as follows:
a manufacturing method of a steel-to-PTFE fabric self-lubricating rod end knuckle bearing comprises a rod end body, PTFE fabrics and an inner ring, wherein the rod end body is provided with a rod end eye, the middle of the outer wall of the rod end eye is provided with a symmetrical step structure, and the manufacturing method comprises the following steps:
s1, after sand blasting is carried out on the rod end eyelet, the PTFE fabric is adhered in the rod end eyelet of the rod end body, and then the gasket pre-expansion treatment is carried out through a dryer;
s2, placing a rod end body and an inner ring on an extrusion lower die, sleeving the extrusion lower die and the inner ring on an extrusion mandrel, fixing the rod end body on the extrusion mandrel, sleeving the rod end body into an extrusion upper die, wherein the extrusion upper die and the extrusion lower die are symmetrical to each other, the extrusion upper die and the extrusion lower die are respectively provided with an inner step surface, a middle step surface and an outer end surface, the inner step surface corresponds to the outer end surface of the inner ring, the middle step surface corresponds to the outer end surface of the rod end body, and an arc transition surface is arranged between the middle step surface and the outer end surface;
and S3, extruding the lower extrusion die and the upper extrusion die to deform the rod end body until the outer end surfaces of the upper extrusion die and the lower extrusion die are respectively closed with the outer step surface of the rod end eyelet.
Further comprising step S4, repeating step S3 according to the molding condition of a mold.
And S5, placing the rod end joint bearing obtained in the S3 or S4 on a clearance treatment lower die, sleeving an inner ring on a clearance treatment mandrel, enabling a rod end body to abut against the outer arc surface of the clearance treatment lower die, pressing the inner ring by using a clearance treatment upper die, enabling the end surface of the inner ring to be abutted against the inner step surface of the clearance treatment lower die, and treating the other surface of the rod end body by using the same method.
The step structure of the outer wall of the rod end eyelet forms a circumferential bulge, the width of the bulge is half of the width of the rod end eyelet, and the widths of two sides of the bulge are respectively greater than half of the width of the bulge.
The inner ring is subjected to heat treatment and hard chromium plating on the spherical surface in advance, and the heat treatment hardness is 58-62 HRC.
The second technical scheme adopted by the invention for solving the technical problems is as follows:
the steel-to-PTFE fabric self-lubricating rod end joint bearing manufactured by the manufacturing method.
The invention has the beneficial effects that: the invention uses PTFE material with self-lubricating function for the extrusion type rod end knuckle bearing, adopts semi-extrusion process for extrusion, realizes the maintenance-free effect of the product through the self-lubricating property of the PTEF fabric, improves the service life of the product, is suitable for occasions with limited space, troublesome assembly and disassembly, inconvenient replacement, inconvenient lubrication and strong torque requirement, has the same service performance as the PTFE fabric rod end knuckle bearing assembled by section steel, short processing and manufacturing route and lower cost, and can flexibly adjust the play or torque.
The invention is further explained in detail with the accompanying drawings and the embodiments; the steel-to-PTFE fabric self-lubricating rod end knuckle bearing and method of making the same of the present invention is not limited to the embodiments.
Drawings
FIG. 1 is a schematic diagram of a prior art self-lubricating rod end joint bearing of assembled steel and PTFE fabric.
FIG. 2 is a schematic diagram of an outer ring extruding step of a PTFE fabric self-lubricating rod end joint bearing by using an existing assembly steel.
FIG. 3 is a schematic diagram of a press-fit process for a prior art self-lubricating rod end joint bearing of assembled steel to PTFE fabric.
FIG. 4 is a schematic diagram of a riveting step of a self-lubricating rod end joint bearing of PTFE fabric of an existing assembled steel.
FIG. 5 is a schematic diagram of a rod end body of a steel-on-PTFE fabric self-lubricating rod end joint bearing according to a preferred embodiment of the present invention prior to extrusion.
FIG. 6 is a schematic diagram of the inner race of a steel-to-PTFE fabric self-lubricating rod end joint bearing in accordance with a preferred embodiment of the present invention.
FIG. 7 is a schematic diagram illustrating the steps for extruding the rod end body of the steel-to-PTFE fabric self-lubricating rod end joint bearing in accordance with a preferred embodiment of the present invention.
FIG. 8 is a schematic structural view of the step of processing the play of the steel-to-PTFE fabric self-lubricating rod end joint bearing according to a preferred embodiment of the present invention.
FIG. 9 is a schematic diagram of a steel to PTFE fabric self-lubricating rod end joint bearing according to a preferred embodiment of the present invention.
Fig. 10 is a schematic view showing a structure in which a doming phenomenon occurs in the pressing.
Detailed Description
In an embodiment, referring to fig. 5 and 6, the steel-to-PTFE fabric self-lubricating rod end joint bearing of the present invention includes a rod end body 1, a PTFE fabric 2, and an inner ring 3, where the rod end body 1 is provided with a rod end eyelet 11, a symmetric step structure 12 is disposed in the middle of an outer wall of the rod end eyelet 11, the step structure 12 forms a circumferential protrusion, a width C of the protrusion 12 is half of a width a of the rod end eyelet 11, two sides of the protrusion 12 are respectively arc-shaped, a width B of the protrusion is half of the width a of the protrusion 12 plus 0.1 to 0.2mm, the plus portion can make an end surface over-pressurized to ensure symmetry, the inner ring 3 is subjected to heat treatment and spherical hard chrome plating in advance, and the heat treatment hardness is 58 to 62 HRC.
The manufacturing steps are as follows:
s1, after sand blasting is carried out on the rod end eyelet, the PTFE fabric 2 is stuck in the rod end eyelet 11 of the rod end body 1, and then pre-expansion treatment of a gasket is carried out through a dryer;
s2, placing the rod end body 1 and the inner ring 3 on an extrusion lower die 4, sleeving the extrusion lower die 4 and the inner ring 3 on an extrusion mandrel 5, fixing the rod end 13 of the rod end body 1 and sleeving an extrusion upper die 6, wherein the extrusion upper die 6 and the extrusion lower die 4 are symmetrical to each other, the extrusion upper die 6 and the extrusion lower die 4 are respectively provided with an inner step surface, a middle step surface and an outer end surface, the inner step surface corresponds to the outer end surface of the inner ring 3, the middle step surface corresponds to the outer end surface of the rod end body 1, and an arc transition surface is arranged between the middle step surface and the outer end surface;
s3, referring to fig. 7, the upper squeeze die 6 is squeezed by the press to deform the rod end body until the outer end faces of the upper squeeze die 6 and the lower squeeze die 4 are respectively closed with the outer step faces of the rod end eyelet 1.
S4, repeating the step S3 according to the molding condition of the first mold;
s5, referring to fig. 8, the rod end spherical plain bearing obtained in step S4 is placed on the play processing lower die 7, the inner ring 3 is fitted over the play processing mandrel 8, the rod end body 1 abuts on the outer arc surface of the play processing lower die 7, the inner ring 3 is pressed by the play processing upper die 9, the end surface of the inner ring 3 is pressed against the inner step surface of the play processing lower die 7, the other surface of the rod end spherical plain bearing is processed by the same method, and a desired play or torque can be processed by adjusting the cavity of the play processing lower die.
The above-described method results in the steel-on-PTFF fabric self-lubricating rod end knuckle bearing of FIG. 9.
In step S3, during extrusion, the end surface of the rod end 1 is free to stretch and deform, so that the end surface is well formed near the non-extruded part, and no middle arching phenomenon occurs (see the middle arching part 9' shown in fig. 10), which increases the contact area between the outer spherical surface of the inner ring 3 and the rod end 1 during operation of the rod end 1, and improves the service life. The method has the advantages that the performance of the large wrap angle bearing is particularly obvious, the larger the wrap angle is, the easier the middle part which is not pressed to arch during forming is, the service life is not influenced well, the extrusion method can eliminate the arch, the better the forming can be realized, the phenomenon of axial movement can be improved or eliminated, the effect the same as that of an assembled self-lubricating type is achieved, and the cost is greatly reduced.
The above embodiments are merely intended to further illustrate the steel-on-PTFF fabric self-lubricating rod end knuckle bearing and the method of making the same of the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention fall within the scope of the technical solution of the present invention.
Claims (7)
1. A manufacturing method of a steel-to-PTFE fabric self-lubricating rod end joint bearing is characterized by comprising the following steps of: the steel is to PTFE fabric self-lubricating rod end joint bearing includes pole end body, PTFE fabric and inner circle, the pole end body is established the rod end eyelet, and the centre of the outer wall of rod end eyelet is equipped with symmetrical stair structure, and its manufacturing step is as follows:
s1, after sand blasting is carried out on the rod end eyelet, the PTFE fabric is adhered in the rod end eyelet of the rod end body, and then the gasket pre-expansion treatment is carried out through a dryer;
s2, placing a rod end body and an inner ring on an extrusion lower die, sleeving the extrusion lower die and the inner ring on an extrusion mandrel, fixing the rod end body on the extrusion mandrel, sleeving the rod end body into an extrusion upper die, wherein the extrusion upper die and the extrusion lower die are symmetrical to each other, the extrusion upper die and the extrusion lower die are respectively provided with an inner step surface, a middle step surface and an outer end surface, the inner step surface corresponds to the outer end surface of the inner ring, the middle step surface corresponds to the outer end surface of the rod end body, and an arc transition surface is arranged between the middle step surface and the outer end surface;
and S3, extruding the lower extrusion die and the upper extrusion die to deform the rod end body until the outer end surfaces of the upper extrusion die and the lower extrusion die are respectively closed with the outer step surface of the rod end eyelet.
2. The method of manufacturing a steel to PTFE fabric self-lubricating rod end spherical plain bearing of claim 1, wherein: further comprising step S4, repeating step S3 according to the molding condition of a mold.
3. The method of manufacturing a steel to PTFE fabric self-lubricating rod end spherical plain bearing of claim 1, wherein: and S5, placing the rod end joint bearing obtained in the step S3 on a clearance treatment lower die, sleeving an inner ring on a clearance treatment mandrel, enabling a rod end body to abut against the outer arc surface of the clearance treatment lower die, pressing the inner ring by using the clearance treatment upper die, enabling the end surface of the inner ring to be abutted against the inner step surface of the clearance treatment lower die, and treating the other surface of the rod end body by using the same method.
4. The method of manufacturing a steel to PTFE fabric self-lubricating rod end spherical plain bearing of claim 2, wherein: and S5, placing the rod end joint bearing obtained in the step S4 on a clearance treatment lower die, sleeving an inner ring on a clearance treatment mandrel, enabling a rod end body to abut against the outer arc surface of the clearance treatment lower die, pressing the inner ring by using the clearance treatment upper die, enabling the end surface of the inner ring to be abutted against the inner step surface of the clearance treatment lower die, and treating the other surface of the rod end body by using the same method.
5. The method of manufacturing a steel to PTFE fabric self-lubricating rod end spherical plain bearing of claim 1, wherein: the step structure of the outer wall of the rod end eyelet forms a circumferential bulge, the width of the bulge is half of the width of the rod end eyelet, and the widths of two sides of the bulge are respectively greater than half of the width of the bulge.
6. The method of manufacturing a steel to PTFE fabric self-lubricating rod end spherical plain bearing of claim 1, wherein: the inner ring is subjected to heat treatment and hard chromium plating on the spherical surface in advance, and the heat treatment hardness is 58-62 HRC.
7. A steel-to-PTFE fabric self-lubricating rod end spherical joint bearing manufactured according to a manufacturing method of any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910660294.3A CN110328295B (en) | 2019-07-22 | 2019-07-22 | Steel-to-PTFE fabric self-lubricating rod end joint bearing and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910660294.3A CN110328295B (en) | 2019-07-22 | 2019-07-22 | Steel-to-PTFE fabric self-lubricating rod end joint bearing and manufacturing method thereof |
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| CN110328295A CN110328295A (en) | 2019-10-15 |
| CN110328295B true CN110328295B (en) | 2020-10-20 |
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| CN110732598A (en) * | 2019-11-29 | 2020-01-31 | 江苏希西维轴承有限公司 | extrusion joint bearing compression molding device and method |
| CN111618222A (en) * | 2020-06-04 | 2020-09-04 | 福建龙溪轴承(集团)股份有限公司 | Integral joint bearing precision forging forming device with flange and forming method thereof |
| CN112303133B (en) * | 2020-10-20 | 2022-02-22 | 八环科技集团股份有限公司 | Assembling process of self-lubricating joint bearing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3583050A (en) * | 1968-07-19 | 1971-06-08 | Nippon Thompson Co Ltd | Method of the manufacture of a spherical bearing |
| JP2001193741A (en) * | 2000-01-05 | 2001-07-17 | Minebea Co Ltd | Spherical sliding bearing and manufacturing method |
| CN202185496U (en) * | 2011-06-15 | 2012-04-11 | 中国南方航空工业(集团)有限公司 | Joint bearing flanging device |
| CN202371007U (en) * | 2011-12-23 | 2012-08-08 | 天津市宝坻区东亚光大地毯厂 | High-speed rod end joint bearing |
| CN206216600U (en) * | 2016-10-19 | 2017-06-06 | 中航飞机股份有限公司西安飞机分公司 | A kind of oscillating bearing installation mold |
| CN107498303A (en) * | 2017-07-31 | 2017-12-22 | 成都飞机工业（集团）有限责任公司 | A kind of oscillating bearing assembling guide-localization riveting device and assembly method |
| CN208997175U (en) * | 2018-10-31 | 2019-06-18 | 福建龙溪轴承(集团)股份有限公司 | A kind of aluminium alloy oscillating bearing and self-lubricating knuckle bearing |
| CN209006993U (en) * | 2018-11-23 | 2019-06-21 | 大连交通大学 | Monoblock type oscillating bearing extrusion forming device |
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