CN110682059B - Processing method of needle roller chamfer and processing method of needle roller - Google Patents
Processing method of needle roller chamfer and processing method of needle roller Download PDFInfo
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- CN110682059B CN110682059B CN201910961720.7A CN201910961720A CN110682059B CN 110682059 B CN110682059 B CN 110682059B CN 201910961720 A CN201910961720 A CN 201910961720A CN 110682059 B CN110682059 B CN 110682059B
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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
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
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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
- F16C33/30—Parts of ball or roller bearings
- F16C33/34—Rollers; Needles
Abstract
The invention provides a processing method of a needle roller chamfer and a processing method of a needle roller, and relates to the technical field of bearing manufacturing. The processing method of the needle roller chamfer comprises the following processing steps: cutting the bar stock to obtain a first needle rolling blank; performing whipping treatment on the first needle blank, and forming first chamfers at two ends of the first needle blank to obtain a second needle blank; carrying out soft grinding on the second needle roller blank to obtain a third needle roller blank; and placing the third roller pin blank into a throwing cylinder, and throwing the first chamfer to obtain a second chamfer by the throwing cylinder. The throwing step in the processing method of the needle roller chamfer can effectively compress the dispersion difference of the radius of the first chamfer to obtain the second chamfer with higher radius consistency, so that the processing precision of the needle roller chamfer is improved, the smooth loading of the needle roller during the assembly of the needle roller bearing is further ensured, the stability of the needle roller bearing during the operation is improved, and the service life of the needle roller bearing is correspondingly prolonged.
Description
Technical Field
The invention relates to the technical field of bearing manufacturing, in particular to a processing method of a needle roller chamfer and a processing method of a needle roller.
Background
The needle bearing is a bearing with needle rollers, has the characteristic of compact structure, has higher load bearing capacity despite the smaller section of the needle rollers, and is particularly suitable for a supporting structure with limited radial installation size.
When the needle bearing runs, the running stability of the needle roller is directly related to the service life of the needle bearing, when the chamfer dispersion of the needle roller is large, the running instability of the needle roller is easily caused, and the swing is generated to be in abnormal contact with the flange of the retainer to cause the abrasion of the retainer; further, when the variation of the needle roller chamfers is large, the difficulty in assembling the needle rollers to the cage and the inner ring is also large.
The loose difference of the needle roller chamfer of the existing needle roller bearing is large, so that the needle roller bearing is difficult to assemble, poor in use stability and short in service life.
Disclosure of Invention
The invention aims to provide a processing method of a needle roller chamfer and a processing method of a needle roller, which are used for solving the technical problems that the needle roller chamfer of a needle roller bearing in the prior art has large dispersion difference, so that the needle roller bearing is difficult to assemble, poor in use stability and short in service life.
In a first aspect, an embodiment of the present invention provides a method for processing a needle roller chamfer, where the processing steps include:
cutting the bar stock to obtain a first needle rolling blank;
performing whipping treatment on the first needle blank, and forming first chamfers at two ends of the first needle blank to obtain a second needle blank;
polishing the second needle roller blank to obtain a third needle roller blank;
and placing the third roller pin blank into a throwing cylinder, and throwing the first chamfer to obtain a second chamfer by the throwing cylinder.
In an optional implementation manner, after the polishing drum polishes the third needle blank for a preset time, performing sampling inspection on the chamfer of the third needle blank;
if the radius of the chamfer meets the tolerance range, stopping the throwing of the third needle blank by the throwing cylinder;
and if the radius of the chamfer does not meet the tolerance range, the throwing cylinder continues to carry out throwing channeling treatment on the third roller pin blank until the chamfer meets the tolerance range to obtain the second chamfer.
In an optional implementation mode, the preset time is 1-2 hours, and after the polishing drum polishes and flees the third needle blank for the preset time, the chamfer of the third needle blank is subjected to sampling inspection every 1 hour until the chamfer meets the tolerance range.
In an alternative embodiment, the chamfer of the third pin blank is spot inspected using a projector.
In an alternative embodiment, the radius R2 of the second chamfer is not greater than the radius R1 of the first chamfer and the tolerance range for the radius R2 of the second chamfer is ± 0.1 mm.
In an optional embodiment, the inner wall of the polishing barrel is formed by a plurality of plane portions which are arranged along the circumferential direction of the polishing barrel in a surrounding mode.
In an alternative embodiment, each of the planar portions includes at least one play surface in an axial direction of the play cylinder, and the play surface is planar.
In an optional embodiment, the rotating speed of the throwing cylinder is 550-650 r/min, and the throwing time is 3-4 h.
In an optional implementation mode, a cylinder body with an arc-shaped inner wall is used for performing whipping head treatment on the first needle blank for 8-10 hours, and first chamfers are formed at two ends of the first needle blank to obtain the second needle blank.
In a second aspect, an embodiment of the present invention provides a method for processing a needle roller, including the method for chamfering a needle roller according to any one of the foregoing embodiments, where a third needle blank is thrown by a throw drum to obtain a fourth needle blank, and the fourth needle blank is continuously processed, where the processing steps include:
carrying out heat treatment on the fourth needle roller blank to obtain a fifth needle roller blank;
grinding the fifth needle roller blank to obtain a sixth needle roller blank;
and polishing a correction line on the sixth roller pin blank to obtain a roller pin finished product.
The processing method of the needle roller chamfer provided by the invention can comprise the following steps of firstly selecting a proper bar stock, and cutting the bar stock to obtain a first needle roller blank with a set length, wherein the length and the outer diameter of the first needle roller blank are both larger than those of a required needle roller product, so as to reserve the allowance of subsequent processing; then the first needle blank is placed into a whipped head device for whipped head treatment, the end part of the first needle blank is collided and pressed with the whipped head device to preliminarily form a first chamfer with large dispersion difference, and a second needle blank with first chamfers at two ends is obtained; and then polishing the outer wall of the second needle roller blank, removing burrs and the like on the outer wall of the second needle roller blank, polishing the outer wall of the second needle roller blank, removing the allowance of the length and the outer diameter of the second needle roller blank, and obtaining a third needle roller blank with the set length and the set outer diameter, wherein after the soft polishing process, the chamfer angle of the third needle roller blank is correspondingly reduced.
After the outer diameter of the third needle blank reaches a set precision, the third needle blank is placed into a casting cylinder for casting channeling treatment, the inner wall of the casting cylinder is pressed against a first chamfer at the end part of the third needle blank for secondary processing, wherein the area with the larger radius in the second chamfer is in an outward convex shape, the pressing probability and pressing pressure between the outward convex area and the inner wall of the casting cylinder are higher, so that the scattering difference of the radius of the first chamfer is effectively compressed, the second chamfer with the higher radius consistency is obtained, the processing precision of the needle chamfer is improved, the smooth installation of needles during needle bearing assembly is ensured, the stability of the needle bearing during operation is improved, the abrasion of the needles is correspondingly reduced, and the service life of the needle bearing is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart of a processing method of a needle roller according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a processing method of the needle roller chamfer provided by the embodiment of the invention;
fig. 3 is a schematic view of a first internal structure of a barrel in the processing method for the needle roller chamfer, wherein the barrel is a prismatic ten-angle barrel;
fig. 4 is a schematic view of a second internal structure of the barrel thrower in the processing method for the needle roller chamfer, provided by the embodiment of the present invention, wherein the barrel throws the barrel in an octagonal shape, and each planar portion includes a plurality of throwing fleeing surfaces.
Icon: 100-polishing the barrel; 110-plane section; 111-fleeing surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," "fifth," "sixth," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal" and the like do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it is also to be noted that, unless otherwise explicitly specified or limited, the term "mounted" is to be understood broadly, for example, as being fixedly attached, detachably attached, or integrally attached; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The embodiment provides a processing method of a needle roller chamfer, as shown in fig. 2, the processing steps include: cutting the bar stock to obtain a first needle rolling blank; performing whipping treatment on the first needle blank, and forming first chamfers at two ends of the first needle blank to obtain a second needle blank; polishing the second needle roller blank to obtain a third needle roller blank; and placing the third roller pin blank into a throwing cylinder 100, and throwing the first chamfer by the throwing cylinder 100 to obtain a second chamfer.
The processing method of the needle roller chamfer provided by the embodiment can include the following steps of firstly selecting a proper bar stock, and cutting the bar stock to obtain a first needle roller blank with a set length, wherein the length tolerance of the first needle roller blank can be h13 level, and the outer diameter of the first needle roller blank can be larger than that of a required needle roller product to leave a subsequent processing allowance; then the first needle blank is placed into a whipped head device for whipped head treatment, the end part of the first needle blank is collided and pressed with the whipped head device to preliminarily form a first chamfer with large dispersion difference, and a second needle blank with first chamfers at two ends is obtained. Wherein, the material cutting process can use a lathe or other cutting tools.
And then polishing the outer wall of the second needle roller blank, removing burrs and the like on the outer wall of the second needle roller blank, polishing the outer wall of the second needle roller blank, and removing the allowance of the length and the outer diameter of the second needle roller blank to obtain a third needle roller blank with a set length and an outer diameter, wherein after the soft grinding process, the chamfer angle of the third needle roller blank is correspondingly reduced. Preferably, the polishing mode of the second needle roller blank is soft polishing; specifically, the second needle blank may be soft ground using a grinder or other grinding tool.
After the outer diameter of the third needle blank reaches a set precision, the third needle blank is placed into the casting cylinder 100 for casting channeling treatment, the inner wall of the casting cylinder 100 is pressed against a first chamfer at the end part of the third needle blank for secondary processing, wherein the area with the larger radius in the second chamfer is in an outward convex shape, the pressing probability and the pressing pressure between the outward convex area and the inner wall of the casting cylinder 100 are higher, so that the scattering difference of the radius of the first chamfer is effectively compressed, the second chamfer with the higher radius consistency is obtained, the processing precision of the needle chamfer is improved, the smooth loading of the needle during the assembly of the needle bearing is ensured, the stability during the operation of the needle bearing is improved, and the service life of the needle bearing is correspondingly prolonged.
Optionally, in this embodiment, the radius R2 of the second chamfer is not greater than the radius R1 of the first chamfer, and the tolerance range of the radius R2 of the second chamfer may be ± 0.1 mm.
Specifically, when a bar material is selected, the outer diameter allowance of the bar material can be 0.1mm, for example, a bar material with the outer diameter of 2mm can be selected, a first needle blank with the outer diameter of 2mm is obtained after material cutting, and at the moment, the end part of the first needle blank is a plane end part and is not chamfered; placing the first needle roller blank into a whipping head device for whipping head treatment, and obtaining a first chamfer with the radius range of 0.2 mm-1.0 mm at the end part of the first needle roller blank to obtain a second needle roller blank, wherein the radius of a partial area of the first chamfer is 0.2mm, the radius of the partial area is 1.0mm, the radius of the partial area is between 0.2 mm-1.0 mm, the radius difference of the whole first chamfer is large, and the radius difference can reach 0.8mm at most; and then placing the second needle blank into a grinding tool such as a grinding machine and the like to perform soft grinding on the outer wall of the second needle blank, and removing burrs and allowance on the outer wall of the second needle blank to obtain a third needle blank with the outer diameter of 1.9mm, wherein the length tolerance range of the soft-ground third needle blank can reach +0.1/0mm, and the outer diameter tolerance range can reach +/-0.01 mm, and the radius of the first chamfer is correspondingly reduced to 0.2 mm-0.5 mm due to the fact that the end part of the first chamfer is processed in the outer diameter soft grinding process of the third needle blank, so that the radius of the first chamfer is also influenced by the outer diameter of the third needle blank, and the radius dispersion difference of the first chamfer can be reduced to a certain extent by improving the outer diameter precision of the third needle blank in the soft grinding process, and the consistency of the needle chamfers is improved.
And then, the third needle roller blank is placed into the throwing cylinder 100 for throwing channeling, the throwing cylinder 100 performs secondary collision pressure on a first chamfer at the end part of the third needle roller blank, the throwing cylinder 100 performs high-probability collision pressure on an area with a larger radius in the first chamfer, and the radius difference of the first chamfer is compressed to obtain a second chamfer with a larger radius difference, wherein the radius of the second chamfer can be 0.2mm, and the tolerance range can be +/-0.1 mm, so that the needle roller chamfers with higher consistency are obtained, the convenience of needle roller assembly and the stability of a bearing assembled with the needle roller during operation are correspondingly improved, and the service life of the bearing is prolonged.
Alternatively, in this embodiment, as shown in fig. 3 and 4, the barrel 100 for throwing the third needle roller blank may have the following structure: the inner wall of the polishing barrel 100 may be defined by a plurality of planar portions 110 circumferentially surrounding the polishing barrel 100. When the throwing cylinder 100 throws and flees the third roller pin blank, the first chamfer at the end of the third roller pin blank is collided with the plane part 110 of the side wall of the throwing cylinder 100, the plane inner wall of the plane part 110 is used for effectively colliding and pressing the area with larger radius of the first chamfer, and the radius dispersion difference is compressed, so that the second chamfer with higher radius consistency is obtained. Specifically, the number of the plane portions 110 may be 5 to 10, for example, when the number of the plane portions 110 is 6, the polishing barrel 100 is a hexagonal polishing barrel 100; when the number of the plane portions 110 is 10, the polishing barrel 100 is a decagonal polishing barrel 100.
Specifically, in the present embodiment, each of the planar portions 110 may include at least one play-throwing surface 111 along the axial direction of the throw barrel 100, and the play-throwing surface 111 is planar. In this embodiment, the barrel of the projectile barrel 100, as shown in fig. 3, when each planar portion 110 includes a planar projectile surface 111 along its length, the projectile barrel 100 is prismatic; as shown in fig. 4, when each of the planar portions 110 includes two or more planar fleeing surfaces 111 along the length direction thereof, the throw barrel 100 is approximately shuttle-shaped, each of the planar portions 110 serves as a lobe of the throw barrel 100, and the planar fleeing surfaces 111 therein effectively collide against the first chamfer to improve the radius consistency thereof; each planar portion 110 is shown in fig. 4 to include three drumming surfaces 111 along its length.
Specifically, when the polishing barrel 100 runs, the polishing barrel is driven by the driving device to rotate around the axis of the polishing barrel 100, the third needle blank moves in the polishing barrel 100, and a first chamfer of the third needle blank collides with a planar polishing fleeing surface 111 of the polishing barrel 100; alternatively, the drive means may comprise a motor.
Optionally, the rotation speed of the throwing cylinder 100 can be 550-650 r/min, and the throwing time is 3-4 h. The rotating speed and the throwing time are only within a specific range, and when the machine is actually used, the throwing cylinders 100 with proper sizes are selected according to the size and the number of the third needle blanks, and the operating rotating speed and the operating time of the throwing cylinders 100 are correspondingly set. For example, when the decagonal throwing cylinder 100 is selected, the 400kg third needle roller blank can be thrown and fleed at one time, and the rotating speed and the throwing and fleeing time can be selected under the working condition.
In this embodiment, a cylinder body with an inner wall being an arc surface can be used for performing whipping head treatment on the first needle blank for 8-10 hours, and first chamfers are formed at both ends of the first needle blank to obtain a second needle blank. The inner wall of the arc surface of the cylinder body is impacted with the end part of the first needle blank during the whipping head treatment, and the end part is correspondingly compressed into an arc shape, so that a first chamfer formed preliminarily is obtained. Specifically, the cylindrical body may be cylindrical or spherical.
In this embodiment, after the third needle blank is placed in the polishing barrel 100 for polishing and fleeing, the polishing barrel 100 can perform sampling inspection on the chamfer of the third needle blank after polishing and fleeing the third needle blank for a preset time; if the radius of the chamfer meets the tolerance range, stopping the throwing of the third needle blank by the throwing cylinder 100; and if the radius of the chamfer does not meet the tolerance range, the throwing cylinder 100 continues to carry out throwing channeling treatment on the third roller pin blank until the chamfer meets the tolerance range to obtain the second chamfer. After the polishing barrel 100 performs polishing treatment on the first chamfer of the third needle blank for a period of time, the third needle blank can be subjected to spot inspection, the polishing degree of the polishing barrel 100 on the first chamfer is known in time, the adverse effect of the polishing of the first chamfer to the chamfer precision is reduced, the polishing barrel 100 continues to perform polishing treatment on the first chamfer, the accuracy of the obtained second chamfer is further ensured, and the energy consumption and the time loss of the operation of the polishing barrel 100 are correspondingly reduced.
Specifically, the preset time can be 1-2 hours, the third needle blank is placed into the polishing barrel 100 for polishing and fleeing, and after the polishing barrel 100 polishes and flees the third needle blank for 1-2 hours, the chamfer of the third needle blank can be subjected to sampling inspection at intervals of 1 hour until the chamfer meets the tolerance range. By adopting the spot check interval, the throwing fleeing degree of the throwing cylinder 100 to the first chamfer can be known in time, and the adverse effect on the continuous operation of the throwing cylinder 100 and the waste of manpower and material resources caused by frequent spot checks can be reduced.
Alternatively, in this embodiment, the projection apparatus may be used to perform sampling inspection on the chamfer of the third needle blank. Specifically, during spot inspection, a third needle blank is randomly taken out from the polishing barrel 100, the third needle blank is projected by using a projector, and then the projection is measured by using a measuring tool (for example, the projection can be transmitted to a computer, and data such as the size of the projection is measured by using computer software), so that a tolerance range of a chamfer of the third needle blank is obtained, and if the tolerance range reaches a set range, namely the chamfer becomes a second chamfer, it is indicated that the needle blank in the polishing barrel 100 has become a qualified product, and polishing channeling is stopped; if the tolerance range of the chamfer is larger than the set range, the throwing cylinder 100 continues to throw the third roller pin blank, the third roller pin blank is subjected to sampling inspection again after a certain time, and the process is repeated. In the process of spot inspection, a plurality of third needle roller billets can be spot inspected so as to improve the accuracy of spot inspection.
The embodiment further provides a processing method of the needle roller, as shown in fig. 1, including the processing method of the needle roller chamfer, the third needle blank is thrown by the throw cylinder 100 to obtain a fourth needle blank, and the processing step of the fourth needle blank is continued, where the processing step includes: carrying out heat treatment on the fourth needle roller blank to obtain a fifth needle roller blank; grinding the fifth roller pin blank to obtain a sixth roller pin blank; and (5) polishing a correction line on the sixth roller pin blank to obtain a roller pin finished product.
Obtaining a fourth needle blank with certain precision according to the processing method of the needle roller chamfer, and then carrying out heat treatment on the fourth needle blank to improve the hardness of the needle blank and obtain a fifth needle blank; then, grinding the fifth needle roller blank, and finely grinding the outer diameter of the fifth needle roller blank to ensure that the tolerance range of the outer diameter of the needle roller blank is within +/-0.01 mm to obtain a sixth needle roller blank; and finally, polishing a correction line on the outer wall of the sixth needle blank according to actual needs to enable the appearance of the needle blank to have a certain radian, so as to obtain a needle roller finished product.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A processing method of a needle roller chamfer is characterized by comprising the following processing steps:
cutting the bar stock to obtain a first needle rolling blank;
performing whipping treatment on the first needle blank, and forming first chamfers at two ends of the first needle blank to obtain a second needle blank;
polishing the second needle roller blank to obtain a third needle roller blank;
placing the third roller pin blank into a throwing cylinder (100), and throwing the first chamfer by the throwing cylinder (100) to obtain a second chamfer;
the inner wall of the throwing cylinder (100) is formed by a plurality of plane parts (110) which are arranged along the circumferential direction of the throwing cylinder (100);
each plane part (110) comprises at least one fleeing surface (111) for impacting and pressing a first chamfer along the axial direction of the throwing barrel (100), and the fleeing surface (111) is planar;
when each plane part (110) comprises a plane fleeing surface (111), the throwing barrel (100) is prismatic; when each planar portion (110) includes two or more planar fleeing surfaces (111), the throw barrel (100) is approximately shuttle-shaped.
2. The needle roller chamfer machining method according to claim 1, wherein the polishing cylinder (100) performs a spot check on the chamfer of the third needle blank after polishing the third needle blank for a preset time;
if the radius of the chamfer meets the tolerance range, stopping the throwing of the third needle blank by the throwing cylinder (100);
and if the radius of the chamfer does not meet the tolerance range, the throwing cylinder (100) continues to throw the third roller pin blank until the chamfer meets the tolerance range to obtain the second chamfer.
3. The needle roller chamfering machining method according to claim 2, wherein the preset time is 1-2 hours, and after the polishing drum (100) polishes the third needle blank for the preset time, the chamfer of the third needle blank is subjected to sampling inspection every 1 hour until the chamfer meets a tolerance range.
4. The needle roller chamfering method according to claim 2, wherein a chamfer of the third needle blank is subjected to a spot check using a projector.
5. The needle roller chamfer machining method according to claim 1, wherein the radius R2 of the second chamfer is not greater than the radius R1 of the first chamfer, and the tolerance range of the radius R2 of the second chamfer is ± 0.1 mm.
6. The needle roller chamfer machining method according to any one of claims 1 to 5, wherein the rotation speed of the barrel (100) is 550 to 650r/min, and the throwing time is 3 to 4 hours.
7. The needle roller chamfering method according to any one of claims 1 to 5, wherein the first needle roller blank is whipped for 8 to 10 hours using a cylinder having an inner wall of a curved surface, and first chamfers are formed at both ends of the first needle roller blank to obtain the second needle roller blank.
8. A method for processing a needle roller, comprising the method for processing a needle roller chamfer according to any one of claims 1 to 7, wherein a fourth needle blank is obtained by polishing a third needle blank through a polishing cylinder (100), and the fourth needle blank is processed continuously, and the processing steps comprise:
carrying out heat treatment on the fourth needle roller blank to obtain a fifth needle roller blank;
grinding the fifth needle roller blank to obtain a sixth needle roller blank;
and polishing a correction line on the sixth roller pin blank to obtain a roller pin finished product.
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| CN201910961720.7A CN110682059B (en) | 2019-10-11 | 2019-10-11 | Processing method of needle roller chamfer and processing method of needle roller |
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| CN201910961720.7A CN110682059B (en) | 2019-10-11 | 2019-10-11 | Processing method of needle roller chamfer and processing method of needle roller |
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| KR20040024778A (en) * | 2002-09-16 | 2004-03-22 | 주식회사 스틸카스피 | Making method of roller for roller bearing |
| CN201651049U (en) * | 2010-04-09 | 2010-11-24 | 江苏南方轴承股份有限公司 | Special needle bearing used for oil pump of speed changing box |
| KR20120019678A (en) * | 2010-08-26 | 2012-03-07 | 박경철 | Needle roller for needle roller bearing and the needle roller manufacture method |
| 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 |
| CN103659562B (en) * | 2013-12-10 | 2016-01-06 | 宁波中和汽配有限公司 | Without corner angle sphere needle roller processing method |
| CN109333326B (en) * | 2018-11-02 | 2022-09-09 | 南京仁恒轴承滚动体有限公司 | Efficient needle roller polishing method |
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