CN112536577B - Hollow roller and forming process thereof - Google Patents
Hollow roller and forming process thereof Download PDFInfo
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- CN112536577B CN112536577B CN202011417159.5A CN202011417159A CN112536577B CN 112536577 B CN112536577 B CN 112536577B CN 202011417159 A CN202011417159 A CN 202011417159A CN 112536577 B CN112536577 B CN 112536577B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention relates to a hollow roller and a molding process thereof, wherein the peripheral surface of the hollow roller is a raceway surface, one end surface is a large end surface, the other end surface is a small end surface, and a through hole is arranged in the center of the hollow roller, wherein the taper of the hollow roller is 1 degree 12 '10', the length is 73mm, the diameter is 41mm, the large end surface and the raceway surface are in transition through a fillet with the radius of 1.5mm, the axial length of 2.5mm and the radial length of 1.5mm, and the small end surface and the raceway surface are in transition through a fillet with the radius of 2.5mm, the axial length of 1.5mm and the radial length of 1.5 mm; the diameter of the through hole is 11.5mm, and 3-degree horn mouths are respectively designed at positions 12mm away from the large end face and the small end face in the through hole; the inner peripheral surface of the through hole positioned at the large end face side port is a 60-degree conical surface, the length of the through hole is 1.5mm, the small end of the through hole is connected with the large end of the bell mouth, the inner peripheral surface of the through hole positioned at the small end face side port is a 45-degree conical surface, the diameter of the large end of the through hole is 20mm, the length of the through hole is less than or equal to 0.5mm, and the small end of the through hole is excessively connected with the large end of the bell mouth through the 60-degree conical surface; the small end face is an arc face with the radius of 1855 mm; the roughness of the inside of the through hole is 0.8.
Description
Technical Field
The invention relates to a roller processing technology, in particular to a hollow roller and a forming technology thereof.
Background
Compared with a solid roller bearing, the hollow roller bearing has the characteristics of high rotation precision, high rigidity, high limit rotation speed and the like, and is widely applied to the machine tool industry.
Disclosure of Invention
The invention provides a hollow roller and a forming process thereof.
The technical scheme of the invention is as follows:
the outer peripheral surface of the hollow roller is a raceway surface, one end surface is a large end surface, and the other end surface is a small end surface; the taper of the hollow roller is 1 degree 12 '10', the length is 73mm, the diameter is 41mm, the large end surface and the raceway surface are in transition through a fillet with the radius of 1.5mm, the axial length of 2.5mm and the radial length of 1.5mm, and the small end surface and the raceway surface are in transition through a fillet with the radius of 2.5mm, the axial length of 1.5mm and the radial length of 1.5 mm; the diameter of the through hole is 11.5mm, and 3-degree horn mouths are respectively designed at positions 12mm away from the large end face and the small end face in the through hole; the inner peripheral surface of the through hole positioned at the large end face side port is a 60-degree conical surface, the length of the through hole is 1.5mm, the small end of the through hole is connected with the large end of the bell mouth, the inner peripheral surface of the through hole positioned at the small end face side port is a 45-degree conical surface, the diameter of the large end of the through hole is 20mm, the length of the through hole is less than or equal to 0.5mm, and the small end of the through hole is excessively connected with the large end of the bell mouth through the 60-degree conical surface; the small end face is an arc face with the radius of 1855 mm; the roughness of the inside of the through hole is 0.8.
By adopting the size specification, the diameter of the through hole of the hollow roller is about 1/3 of the diameter of the roller, so that the roller cannot have insufficient strength and lower bearing capacity due to too large diameter of the through hole, and the fixing pin cannot have the effect of fixing the position due to too small diameter of the through hole; the bell mouth is designed, so that the hollow roller is assembled more smoothly; the roughness of the inner part of the through hole is designed to be 0.8, and in order to reduce the friction of the fixing pin to the inner part of the roller, but the common molding process is adopted by adopting the size regulation, 1) because the diameter of the through hole is small and is close to the central part of the roller, the linear velocity of a turning tool relative to a turning surface is very small during turning, and therefore turning is difficult; 2) because the through-hole is longer, the phenomenon of shake sword takes place easily when using the lathe tool turning hole to it is frequently damaged to fall the tool bit, and the inner wall roughness in hole also can't reach the requirement.
To this end, we further improve the process for forming hollow rollers, said process comprising the steps of:
1) saw stock
The raw material is sawed into sections of raw material of a desired length.
2) Soft vehicle forming
A. And clamping the raw material section on a No. 1 lathe, and turning the outer diameter and the small end face of the roller.
B. And moving the raw material section turned by the No. 1 lathe to the No. 2 lathe, clamping the small end face, and turning the outer diameter and the large end face of the roller.
C. A10.5 mm drill bit was selected to drill holes from the center of the roller.
D. After the through hole is punched, turning the roller through hole by using an alloy cutter head, and placing the diameter of the through hole to the lower limit of the tolerance zone of a finished product, wherein the tolerance is controlled within 0.02 mm; therefore, the hard vehicle allowance is placed in the tolerance band, so that not only is the excessive hard vehicle allowance avoided, but also the incomplete vehicle phenomenon is avoided.
3) Thermal treatment
The roller is heat treated.
4) Polishing treatment
And polishing to remove the oxide on the surface of the roller, in the recess and in the through hole.
5) Hard turning forming
A. Rough turning, namely selecting the contour of the through hole turned by the alloy cutter head, and removing corresponding deformation and machining allowance.
B. And (4) finish turning, namely selecting a tungsten steel tool bit for machining.
C. And finely turning to obtain a finished product.
After the step 4) and before the step 5), roughly grinding the outer diameter of the roller until the whole raceway surface is completely ground; in step 5), rough turning and finish turning are both based on the rolling surface of the roller.
In the step 5), both rough turning and finish turning adopt numerical control turning, and all the contours are completely moved from head to tail without segmentation in the middle.
And 5) finishing the finished hollow roller to remove burrs and flashes.
The invention has the advantages of reasonable design and ingenious conception, and is matched with the size specification requirement of the hollow roller and is designed with a whole set of stable forming process, the turning difficulty is greatly reduced, the turning tool is not easy to damage, and the universal roughness of the inner wall can be effectively ensured.
Drawings
FIG. 1 is a schematic view of a hollow roller structure.
Detailed Description
As shown in the figure, the outer peripheral surface of the hollow roller is a raceway surface, one end surface is a large end surface, and the other end surface is a small end surface; the taper of the hollow roller is 1 degree 12 '10', the length is 73mm, the diameter is 41mm, the large end surface and the raceway surface are in transition through a fillet with the radius of 1.5mm, the axial length of 2.5mm and the radial length of 1.5mm, and the small end surface and the raceway surface are in transition through a fillet with the radius of 2.5mm, the axial length of 1.5mm and the radial length of 1.5 mm; the diameter of the through hole is 11.5mm, and 3-degree horn mouths are respectively designed at positions 12mm away from the large end face and the small end face in the through hole; the inner peripheral surface of the through hole positioned at the large end face side port is a 60-degree conical surface, the length of the through hole is 1.5mm, the small end of the through hole is connected with the large end of the bell mouth, the inner peripheral surface of the through hole positioned at the small end face side port is a 45-degree conical surface, the diameter of the large end of the through hole is 20mm, the length of the through hole is less than or equal to 0.5mm, and the small end of the through hole is excessively connected with the large end of the bell mouth through the 60-degree conical surface; the small end face is an arc face with the radius of 1855 mm; the roughness of the inside of the through hole is 0.8.
A process for forming a hollow roller, said process comprising the steps of:
1) saw stock
The raw material is sawed into sections of raw material of a desired length.
2) Soft vehicle forming
A. And clamping the raw material section on a No. 1 lathe, and turning the outer diameter and the small end face of the roller.
B. And moving the raw material section turned by the No. 1 lathe to the No. 2 lathe, clamping the small end face, and turning the outer diameter and the large end face of the roller.
C. A10.5 mm drill bit was selected to drill holes from the center of the roller.
D. And after the through hole is punched, turning the through hole of the roller by using an alloy cutter head, and placing the diameter of the through hole to the lower limit of the tolerance zone of the finished product, wherein the tolerance is controlled within 0.02 mm.
3) Thermal treatment
The roller is heat treated.
4) Polishing treatment
And polishing to remove the oxide on the surface of the roller, in the recess and in the through hole.
5) Hard turning forming
A. Rough turning, namely selecting the contour of the through hole turned by the alloy cutter head, and removing corresponding deformation and machining allowance.
B. And (4) finish turning, namely selecting a tungsten steel tool bit for machining.
C. And finely turning to obtain a finished product.
After the step 4) and before the step 5), roughly grinding the outer diameter of the roller until the whole raceway surface is completely ground; in step 5), rough turning and finish turning are both based on the rolling surface of the roller.
In the step 5), both rough turning and finish turning adopt numerical control turning, and all the contours are completely moved from head to tail without segmentation in the middle.
And 5) finishing the finished hollow roller to remove burrs and flashes.
Because of the limited character expression, there exist practically unlimited specific structures, and it will be apparent to those skilled in the art that a number of improvements, decorations, or changes may be made without departing from the principles of the present invention, or the above technical features may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (4)
1. A molding process of a hollow roller comprises the steps that the outer peripheral surface of the hollow roller is a raceway surface, one end surface is a large end surface, and the other end surface is a small end surface; the center of the hollow roller is provided with a through hole penetrating through two ends of the roller; the hollow roller is characterized in that the hollow roller has the taper of 1 degree 12 '10', the length of 73mm and the diameter of 41mm, the large end surface of the hollow roller is in transition with a raceway surface through a fillet with the radius of 1.5mm, the axial length of 2.5mm and the radial length of 1.5mm, and the small end surface of the hollow roller is in transition with the raceway surface through a fillet with the radius of 2.5mm, the axial length of 1.5mm and the radial length of 1.5 mm; the diameter of the through hole is 11.5mm, and 3-degree horn mouths are respectively designed at positions 12mm away from the large end face and the small end face in the through hole; the inner peripheral surface of the through hole positioned at the large end face side port is a 60-degree conical surface, the length of the through hole is 1.5mm, the small end of the through hole is connected with the large end of the bell mouth, the inner peripheral surface of the through hole positioned at the small end face side port is a 45-degree conical surface, the diameter of the large end of the through hole is 20mm, the length of the through hole is less than or equal to 0.5mm, and the small end of the through hole is excessively connected with the large end of the bell mouth through the 60-degree conical surface; the small end face is an arc face with the radius of 1855 mm; the roughness of the inner part of the through hole is Ra0.8;
the process comprises the following steps:
1) saw stock
Sawing the raw material into raw material sections with required lengths;
2) soft vehicle forming
A. Clamping the raw material section on a No. 1 lathe, and turning the outer diameter and the small end face of a roller;
B. moving the raw material section turned by the lathe No. 1 to the lathe No. 2, clamping the small end face, and turning the outer diameter and the large end face of the roller;
C. drilling holes from the center of the roller by using a drill bit of 10.5 mm;
D. after the through hole is punched, turning the roller through hole by using an alloy cutter head, and placing the diameter of the through hole to the lower limit of the tolerance zone of a finished product, wherein the tolerance is controlled within 0.02 mm;
3) thermal treatment
Carrying out heat treatment on the roller;
4) polishing treatment
Polishing to remove the oxide on the surface of the roller, the recess and the inside of the through hole;
5) hard turning forming
A. Rough turning, namely selecting the contour of a through hole turned by the alloy cutter head, and removing corresponding deformation and machining allowance;
B. finely turning, namely selecting a tungsten steel tool bit for machining;
C. and finely turning to obtain a finished product.
2. The molding process according to claim 1, wherein after step 4) and before step 5), the outer diameter of the roller is roughly ground, and the entire raceway surface is completely ground; in step 5), rough turning and finish turning are both based on the rolling surface of the roller.
3. The molding process according to claim 1, wherein in step 5), the rough turning and the finish turning are both numerically controlled turning, and all the profiles go from head to tail without segmentation in the middle.
4. The molding process according to claim 1, wherein after step 5), the finished hollow roller is finished to remove burrs and flashes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011417159.5A CN112536577B (en) | 2020-12-07 | 2020-12-07 | Hollow roller and forming process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011417159.5A CN112536577B (en) | 2020-12-07 | 2020-12-07 | Hollow roller and forming process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112536577A CN112536577A (en) | 2021-03-23 |
| CN112536577B true CN112536577B (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011417159.5A Active CN112536577B (en) | 2020-12-07 | 2020-12-07 | Hollow roller and forming process thereof |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007270970A (en) * | 2006-03-31 | 2007-10-18 | Jtekt Corp | Tapered roller bearing |
| CN202091366U (en) * | 2011-05-25 | 2011-12-28 | 河南三维重工有限公司 | Hollow roller for bearing |
| CN102699080A (en) * | 2012-05-31 | 2012-10-03 | 周方义 | Method for machining bearing tapered roller blank by cold extrusion forming method |
| CN202646371U (en) * | 2012-06-02 | 2013-01-02 | 洛阳轴研科技股份有限公司 | Bearing with tapered holes in inner holes of cylindrical rollers |
| CN103331456A (en) * | 2013-06-26 | 2013-10-02 | 上海斐赛轴承科技有限公司 | Machining method of rolling bearing formed by whole and precise hard turning and molding of sleeve ring |
| CN203316725U (en) * | 2013-07-04 | 2013-12-04 | 瓦房店光达轴承制造有限公司 | One-time lathing molding machine for rollers |
| CN103710509A (en) * | 2014-01-08 | 2014-04-09 | 江苏力星通用钢球股份有限公司 | Manufacturing method of precise tapered roller specially for high speed train unit |
| EP2963305B1 (en) * | 2014-06-30 | 2019-04-17 | Aktiebolaget SKF | Process for manufacturing a hollow roller, hollow roller obtainable via such a process and roller bearing including such a roller |
| CN105127746B (en) * | 2015-09-30 | 2018-01-12 | 戴兆良 | The production technology of bearing ring |
| CN105252223B (en) * | 2015-11-11 | 2017-10-31 | 宝塔实业股份有限公司 | Processing method of the extra large size bearing with pillar hole tapered roller body |
| CN111946737B (en) * | 2020-08-19 | 2022-06-17 | 中车大连机车研究所有限公司 | Hollow roller bearing for rail transit gearbox |
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- 2020-12-07 CN CN202011417159.5A patent/CN112536577B/en active Active
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| CN112536577A (en) | 2021-03-23 |
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Address after: 226500 No. 68 Xingyuan Road, Rugao City, Nantong, Jiangsu. Patentee after: Jiangsu Xingye Precision Roller Technology Co.,Ltd. Address before: 226500 No. 68 Xingyuan Road, Rugao City, Nantong, Jiangsu. Patentee before: RUGAO LIXING ROLLER TECHNOLOGY Co.,Ltd. |