阅读说明：本技术 一种带储油槽的向心短圆柱滚子轴承保持架兜孔加工方法 (Method for machining pocket of centripetal short cylindrical roller bearing cage with oil storage tank ) 是由 郝文路 毛印磊 杨慧萍 于 2021-08-04 设计创作，主要内容包括：本发明属于保持架兜孔加工技术领域,本发明提供一种带储油槽的向心短圆柱滚子轴承保持架兜孔加工方法,步骤一、向心短圆柱滚子轴承保持架圆孔的加工；步骤二、拉刀的固定安装；步骤三、对圆孔的拉铣。本发明的有益效果：1、利用弧形储油槽可以储存足够的润滑油脂；2、保证了圆柱滚子和轴承保持架之间的降温散热效果；3、提高向心短圆柱滚子轴承的使用寿命。(The invention belongs to the technical field of cage pocket processing, and provides a method for processing a pocket of a centripetal short cylindrical roller bearing with an oil storage tank, which comprises the following steps of processing a circular hole of the centripetal short cylindrical roller bearing cage; step two, fixedly mounting the broach; and step three, drawing and milling the round hole. The invention has the beneficial effects that: 1. the arc-shaped oil storage tank can be used for storing enough lubricating grease; 2. the cooling and heat dissipation effects between the cylindrical roller and the bearing retainer are ensured; 3. the service life of the centripetal short cylindrical roller bearing is prolonged.)

1. The utility model provides a take entad short cylindrical roller bearing holder pocket processing method of oil storage tank which characterized in that:

step one, processing a circular hole of a centripetal short cylindrical roller bearing retainer: firstly, fixing the retainer on drilling equipment, and uniformly drilling round holes along the circumferential direction of the side surface of the retainer; step two, fixed mounting of the broach: fixing a tool shank of a broach on the broaching and milling equipment to keep the broach horizontal; step three, the circular hole is milled: firstly, aligning a guide body of the broach with the center of the processed round hole in the first step, then starting the broaching and milling equipment, pushing the square broach of the broach to the other side from one side of the round hole by utilizing the broaching and milling equipment, keeping the broach linearly pushed by taking the center of the round hole as the center, and finally forming a pocket for assembling the cylindrical roller.

2. The method for machining the pocket of the centripetal short cylindrical roller bearing cage with the oil storage groove as claimed in claim 1, wherein: in the first step, the retainer is a radial retainer, and the retainer can rotate 360 degrees on the drilling equipment; the drill bit on the drilling equipment is perpendicular to the radial direction of the retainer by 90 degrees.

3. The method for machining the pocket of the centripetal short cylindrical roller bearing cage with the oil storage groove as claimed in claim 1, wherein: in the second step, the broaching and milling equipment for fixing the broaching tool is perpendicular to the radial direction of the retainer by 90 degrees.

4. The method for machining the pocket of the centripetal short cylindrical roller bearing cage with the oil storage groove as claimed in claim 1, wherein: in the third step, the left end of the guide body of the broach is firstly in contact alignment with the processed round hole in the first step, and under the guiding and guiding action of the guide body, the square cutter is utilized to linearly push and mill the round hole, so that an arc of one of four round holes is reserved.

Technical Field

The invention belongs to the technical field of cage pocket processing, and particularly relates to a method for processing a pocket of a centripetal short cylindrical roller bearing with an oil storage tank.

Background

The cylindrical rollers of the centripetal short cylindrical roller bearing and the roller paths are line contact bearings, and can bear larger radial load. The retainer is used as a core component of the centripetal short cylindrical roller bearing, has the function of isolating the cylindrical rollers, and simultaneously bears great centrifugal force, radial impact and radial vibration in the working process of the centripetal short cylindrical roller bearing, and large sliding friction exists between the retainer and the cylindrical rollers and generates a large amount of heat. Therefore, the material of the retainer of the centripetal cylindrical roller bearing is required to have the characteristics of good heat conductivity, good wear resistance and small friction coefficient, and simultaneously has the matching of certain strength and toughness to keep better elasticity and rigidity.

The pockets of the cage are used for assembling the cylindrical rollers, and the pockets of the cage are generally round and square at present. Because there is the sliding friction effect between entad short cylindrical roller bearing's the cylindrical roller and the holder, can produce a large amount of heats, in the assembly fit clearance between current circular pocket hole or square pocket hole and the cylindrical roller, can not store enough lubricating grease, cause the cooling radiating effect poor between cylindrical roller and the holder, directly lead to entad short cylindrical roller bearing life's reduction. The inventor develops a method for processing the pocket of the centripetal short cylindrical roller bearing retainer with the oil storage groove based on the defects in the prior art, and the method can process the pocket of the retainer with the oil storage groove, so that enough lubricating grease is stored between the retainer and the cylindrical roller, and the cooling and radiating effects are improved.

Disclosure of Invention

The invention aims to solve the technical problems and provides a method for processing the pocket of the centripetal short cylindrical roller bearing retainer with the oil storage groove, which is scientific and reasonable and convenient to operate and can enable the pocket of the retainer to be processed into a structure with the oil storage groove; the invention can solve the problem that in the prior art, enough lubricating grease cannot be stored in the assembly fit clearance between the cylindrical roller and the circular pocket or the square pocket of the retainer, so that the cooling and heat dissipation effects between the cylindrical roller and the retainer are poor.

The technical scheme adopted by the invention is as follows: a processing method of a radial short cylindrical roller bearing cage pocket with an oil storage tank comprises the following steps:

step one, processing a circular hole of a centripetal short cylindrical roller bearing retainer: firstly, fixing the retainer on drilling equipment, and uniformly drilling round holes along the circumferential direction of the side surface of the retainer;

step two, fixed mounting of the broach: fixing a tool shank of a broach on the broaching and milling equipment to keep the broach horizontal;

step three, the circular hole is milled: firstly, aligning a guide body of the broach with the center of the processed round hole in the first step, then starting the broaching and milling equipment, pushing the square broach of the broach to the other side from one side of the round hole by utilizing the broaching and milling equipment, keeping the broach linearly pushed by taking the center of the round hole as the center, and finally forming a pocket for assembling the cylindrical roller.

In the first step, the retainer is a radial retainer, and the retainer can rotate 360 degrees on the drilling equipment; the drill bit on the drilling equipment is perpendicular to the radial direction of the retainer by 90 degrees.

In the second step, the broaching and milling equipment for fixing the broaching tool is perpendicular to the radial direction of the retainer by 90 degrees.

In the third step, the left end of the guide body of the broach is firstly in contact alignment with the processed round hole in the first step, and under the guiding and guiding action of the guide body, the square cutter is utilized to linearly push and mill the round hole, so that an arc of one of four round holes is reserved.

The pocket which is uniformly processed in the circumferential direction on the side face of the retainer comprises an arc-shaped oil storage tank, the arc-shaped oil storage tank is arranged at the upper, lower, left and right middle positions of the pocket, the arc-shaped angles are arranged at the four corners of the pocket, and a contact surface is arranged at the joint of the arc-shaped oil storage tank and the arc-shaped angles; the arc oil storage groove, the arc angle and the contact surface are pockets which are integrated into a belt with the oil storage groove and used for assembling the cylindrical rollers.

The broach comprises a guide body, the guide body is fixedly arranged at the left position of the square knife, the knife handle is fixedly arranged at the right position of the square knife, and the knife handle is used for fixedly mounting the broach.

The side length of the square cutter is smaller than the diameter of the round hole, and the round hole is milled by the square cutter to leave an arc of one of four parts of the round hole to form an arc-shaped oil storage tank.

The guide body is conical with a small diameter at the left end and a large diameter at the right end, and is used for aligning and guiding the square knife.

The R angle of the square cutter mills the round hole to form four arc angles of the pocket, and the four arc angles are used for providing rolling space for the cylindrical roller.

In the first step, firstly, the retainer is fixed on drilling equipment, and round holes are uniformly drilled along the circumferential direction of the side surface of the retainer; the retainer is a radial retainer, the retainer can rotate 360 degrees on the drilling equipment, and a drill bit on the drilling equipment is perpendicular to the radial retainer by 90 degrees. The main purpose of this is: on one hand, when the circular holes are machined in the circumferential direction on the side face of the retainer, the corresponding positions of the retainer and the drill bit do not need to be frequently adjusted, and the convenience for machining the circular holes is improved; on the other hand, the perpendicularity of the circumferential round hole of the retainer is ensured, and the processing precision of the circumferential round hole of the retainer is improved.

In the second step, a tool shank of the broach is fixed on the broaching and milling equipment, so that the broach is kept horizontal; the broaching and milling equipment for fixing the broach is perpendicular to the radial direction of the retainer by 90 degrees. The main purpose of this is: on one hand, the broach is kept to be radially vertical to the circular hole of the retainer, so that the alignment degree of the guide body and the circular hole of the retainer is improved; on the other hand, the drawing and milling precision of the square cutter to the round hole is improved, so that the machining precision of the cage pocket is improved.

In the third step, firstly, the guide body of the broach is aligned to the circle center of the processed round hole in the first step, then the broaching and milling equipment is started, the broaching and milling equipment is utilized to push the square broach of the broach to be pushed to the other side from one side of the round hole, so that the broach keeps linear propulsion by taking the circle center of the round hole as the center, and finally, a pocket for assembling the cylindrical roller is formed. The main purpose of this is: on the one hand, under the cooperation of step two and step three, guaranteed the alignment degree of guide body to the round hole, made the guide body can play accurate guide effect, improved the broaching and milling precision of square sword to the round hole. On the other hand, the square cutter is utilized to draw and mill the round hole, an arc-shaped oil storage tank for storing lubricating grease is formed, and a sufficient storage space is provided for the lubricating grease, so that the cooling and heat dissipation effects between the cylindrical roller and the retainer are guaranteed.

The pocket which is uniformly processed in the circumferential direction on the side face of the retainer comprises an arc-shaped oil storage tank, the arc-shaped oil storage tank is arranged at the upper, lower, left and right middle positions of the pocket, the arc-shaped angles are arranged at the four corners of the pocket, and a contact surface is arranged at the joint of the arc-shaped oil storage tank and the arc-shaped angles; the arc oil storage groove, the arc angle and the contact surface are pockets which are integrated into a belt with the oil storage groove and used for assembling the cylindrical rollers. The main purposes of this arrangement are: on one hand, the arc-shaped oil storage tank is used for storing more lubricating grease and has the functions of cooling and radiating heat generated by friction between the cylindrical roller and the retainer under the condition of not influencing the normal working and rolling of the cylindrical roller, so that the service life of the centripetal short cylindrical roller bearing is prolonged; on the other hand, four arc angles of the pocket provide relatively free rolling gaps for the rolling of the cylindrical roller, and the normal work of the centripetal short cylindrical roller bearing is ensured.

The side length of the square cutter is smaller than the diameter of the round hole, and the round hole is milled by the square cutter to leave an arc of one of four parts of the round hole to form an arc-shaped oil storage tank. The main purposes of this arrangement are: on one hand, the square cutter can be used for broaching and milling the part of the square cutter coinciding with the round hole, and finally an oil storage tank for storing lubricating grease is formed. On the other hand, the four arc angles of the pocket are formed by utilizing the R angles of the four edges of the square cutter, and a relatively free rolling clearance is provided for the rolling of the cylindrical roller.

The guide body is conical with a small diameter at the left end and a large diameter at the right end, and is used for aligning and guiding the square knife. The main purposes of this arrangement are: on one hand, the small end of the guide body is utilized to align the round hole, so that the success rate of alignment is improved; on the other hand, the guide body gradually becomes larger, and a guide guiding effect is provided for linear broaching and milling of the square cutter.

The broaching and milling in the invention is to push a square cutter of a broaching tool to push from one side of a round hole to the other side by utilizing broaching and milling equipment, so that the broaching tool keeps linear propulsion by taking the circle center of the round hole as the center, and finally a pocket of a retainer is formed.

The invention has the beneficial effects that: 1. the arc-shaped oil storage tank can be used for storing enough lubricating grease; 2. the cooling and heat dissipation effects between the cylindrical roller and the retainer are ensured; 3. the service life of the centripetal short cylindrical roller bearing is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the broach according to the present invention;

FIG. 3 is an enlarged view of the R-corner structure of the square knife of the present invention;

in the drawings, the reference numbers: 1. the device comprises a retainer, 2, cylindrical rollers, 3, a round hole, 4, pockets, 41, an arc oil storage tank, 42, an arc angle, 43, a contact surface, 5, a broach, 51, a guide body, 52, a square knife, 53, an R angle, 54 and a knife handle.

Detailed Description

The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings.

As shown in the figure, the invention provides a method for processing a pocket hole of a centripetal short cylindrical roller bearing cage with an oil storage tank, which comprises the following steps:

step one, processing a circular hole of a centripetal short cylindrical roller bearing retainer: firstly, fixing a retainer 1 on drilling equipment, and uniformly drilling round holes 3 along the circumferential direction of the side surface of the retainer 1; the retainer 1 is a radial retainer, and the retainer 1 can rotate 360 degrees on drilling equipment; the drill bit on the drilling equipment is perpendicular to the radial direction of the retainer 1 by 90 degrees;

step two, fixed mounting of the broach: fixing a tool shank 54 of the broach 5 on the broaching and milling equipment to keep the broach 5 horizontal; the broaching and milling equipment for fixing the broach 5 is vertical to the radial direction of the retainer 1 by 90 degrees;

step three, the circular hole is milled: firstly, the left end of a guide body 51 of a broach 5 is in contact alignment with the round hole 3 processed in the first step, then the broaching and milling equipment is started, the square cutter 52 of the broach 5 is pushed to be pushed to the other side from one side of the round hole 3 by utilizing the broaching and milling equipment, under the guiding and guiding action of the guide body 51, the broach 4 keeps linear pushing by taking the circle center of the round hole as the center, the round hole 3 is pushed and milled linearly by utilizing the square cutter 52, an arc shape of one fourth of the round hole 3 is reserved, and finally, a pocket 4 for assembling a cylindrical roller is formed.

The pocket 4 which is uniformly processed in the circumferential direction on the side surface of the retainer 1 comprises an arc-shaped oil storage tank 41, the arc-shaped oil storage tank 41 is arranged at the middle positions of the pocket 4 in the vertical direction and the left and right direction, the arc-shaped corners 42 are arranged at the four corners of the pocket 4, and the joints of the arc-shaped oil storage tank 41 and the arc-shaped corners 42 are provided with contact surfaces 43; the arc oil reservoir 41, the arc horn 42 and the contact surface 43 are integrally formed as a pocket 4 with an oil reservoir for mounting the cylindrical roller 2.

The broach 5 comprises a guide body 51, the guide body 51 is fixedly arranged at the left position of the square knife 52, the handle 54 is fixedly arranged at the right position of the square knife 52, and the handle 54 is used for fixedly mounting the broach 5.

The side length of the square cutter 52 is smaller than the diameter of the round hole 3, and the square cutter 52 mills the round hole 3 to leave an arc of one fourth of the round hole 3 to form an arc oil storage tank 41.

The guide body 51 is conical with a small diameter at the left end and a large diameter at the right end, and the guide body 51 is used for aligning and guiding the square knife.

The round hole 3 is milled away by the R-angle of the square cutter 52 to form four arc-shaped angles 42 of the pocket 4, and the four arc-shaped angles are used for providing rolling space for the cylindrical roller 2.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.