CN219503787U - Milling cutter for machining thrust angular contact ball bearing entity retainer - Google Patents

Abstract

The utility model belongs to the technical field of bearing retainer processing tools, and particularly relates to a milling cutter for processing a thrust angular contact ball bearing entity retainer, which comprises a cutter bar, wherein the outer peripheral surface of the end part of the cutter bar is provided with at least one cutting edge part and a chip groove matched with the cutting edge part, the cutting edge part comprises a front cutter surface, a rear cutter surface and a combined cutting edge formed by intersecting the front cutter surface and the rear cutter surface, the edge curve of the combined cutting edge comprises an inclined section, an inward concave section and an arc section which are sequentially arranged, and one end of the inclined section away from the inward concave section is inclined towards one side away from the central axis of the cutter bar. The utility model can directly process the structure of each surface in the retainer pocket of the thrust angular contact ball bearing entity through one milling cutter, thereby ensuring the processing precision of the retainer and improving the processing efficiency.

Description

Milling cutter for machining thrust angular contact ball bearing entity retainer

Technical Field

The utility model belongs to the technical field of bearing retainer machining tools, and particularly relates to a milling cutter for machining a thrust angular contact ball bearing entity retainer.

Background

At present, the thrust angular contact ball bearing retainer product adopts two modes of locking balls. The rolling mark is extruded by rollers on a lathe at the outer diameter pocket of the retainer, so that the inner wall of the retainer pocket forms a convex lock ball. The other is to press the slope locking balls at the position of the retainer beam during bearing assembly. The two ball locking modes not only increase the processing procedures, thereby increasing the processing cost, but also more importantly directly destroying the original processing precision of the retainer, and the ball locking positions and consistency are poor, so that the problems of ball falling, ball clamping, ball blocking, slag falling of the retainer, ball scratch and the like frequently occur during assembly. Thereby affecting the rotation precision of the bearing and the dynamic balance of the bearing. In order to ensure the machining precision of the thrust angular contact ball bearing retainer, the utility model provides a retainer structure which is directly machined by adopting a milling mode, and therefore, a milling cutter for machining the thrust angular contact ball bearing entity retainer is needed.

Disclosure of Invention

According to the defects of the prior art, the utility model aims to provide the milling cutter for processing the thrust angular contact ball bearing entity retainer, and the structure of each surface in the pocket of the thrust angular contact ball bearing entity retainer is processed by one milling cutter, so that the processing precision of the retainer is ensured, and the retainer has good ball locking effect.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a thrust angular contact ball bearing entity milling cutter for holder processing, includes the cutter arbor, the tip outer peripheral face of cutter arbor be provided with at least one cutting edge portion and with the chip groove of cutting edge portion looks adaptation, cutting edge portion include rake face, flank and by the rake face with the intersecting combination cutting edge that constitutes of flank, the sword shape curve of combination cutting edge is including the slope section, indent section and the circular arc section that set gradually, the slope section keep away from the one end of indent section is to the one side slope of keeping away from the cutter arbor central axis.

Further, the arc section includes middle arc section and terminal arc section, is provided with the straightway between middle arc section and the terminal arc section, middle arc section links up with the indent section, and terminal arc section extends to the end of cutting edge portion.

Further, the straight line segment is located at the diameter of the circular arc segment.

Further, the middle circular arc section is formed on a drum-shaped surface on the clearance surface, the straight line section is formed on a cylindrical surface on the clearance surface, and the end circular arc section is formed on a spherical surface on the clearance surface.

Further, the radius of the middle circular arc section is the same as that of the end circular arc sections, and the width of the straight line section is 0.5mm; the inflection points of the connection among the concave section, the middle circular arc section, the straight line section and the end circular arc section are in smooth transition.

Further, the three blade parts are uniformly distributed along the circumferential direction, and the chip grooves are arranged between two adjacent blade parts.

Further, the chip removal groove is a V-shaped groove; the front cutter surface is a side wall surface of the chip removal groove.

Further, the combined cutting edge is disposed along an axial direction of the tool holder.

Further, the inclination angle of the inclined section relative to the central axis of the cutter bar is 3 degrees, the width of the concave section is 1mm, and the inflection points of the connection among the inclined section, the concave section and the circular arc section are in smooth transition.

Further, the inclined section forms a tapered surface on the flank surface; the concave section is formed on a cylindrical surface on the flank surface.

The beneficial effects of the utility model are as follows: the utility model provides a milling cutter for machining a thrust angular contact ball bearing solid retainer, which comprises a cutter bar, wherein the outer peripheral surface of the end part of the cutter bar is provided with at least one cutting edge part and a chip removal groove matched with the cutting edge part, the cutting edge part comprises a front cutter surface, a rear cutter surface and a combined cutting edge formed by intersecting the front cutter surface and the rear cutter surface, the edge curve of the combined cutting edge comprises an inclined section, an inward concave section and an arc section which are sequentially arranged, and one end of the inclined section, which is far away from the inward concave section, is inclined to one side, which is far away from the central axis of the cutter bar. The retainer pocket is directly milled and machined through the milling cutter, wherein the concave section of the milling cutter forms a locking point of the retainer pocket and a self-locking structure of the retainer, the inclined section of the milling cutter forms a guide ball loading port of the retainer pocket, the assembly of the steel balls is facilitated, and the circular arc section forms a main body structure of the retainer pocket.

Drawings

Fig. 1 is a schematic view of a cutting edge structure of a milling cutter according to an embodiment of the present utility model;

fig. 2 is a schematic front view of a milling cutter according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view of a milling cutter according to an embodiment of the present utility model;

fig. 4 is a schematic view of the arc dimensions of the edge portion (double-edged) of the milling cutter according to the embodiment of the present utility model;

FIG. 5 is a schematic view of a holder formed by milling the present utility model;

FIG. 6 is an enlarged view of the pocket structure at B-B of FIG. 5;

FIG. 7 is a perspective view of a cage structure formed by the milling cutter mechanism of the present utility model;

FIG. 8 is an enlarged view at A of FIG. 7;

in the figure: 1. the retainer ring-shaped body, 1.1 cylinder-shaped body, 1.2 cone-shaped body, 2, ball pocket hole, 3, guide ball loading mouth, 4, ball locking table, 5, serial momentum table, 6, locking claw, 7, middle circular arc part, 8, pocket bottom circular arc part, 9, cutter bar, 10, chip groove, 11, front knife face, 12, back knife face, 13, inclined section, 14, concave section, 15, middle circular arc section, 16, straight line section, 17, terminal circular arc section.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Referring to fig. 1-4, the milling cutter for machining the thrust angular contact ball bearing entity retainer comprises a cutter bar 9, wherein three blade parts are uniformly distributed on the outer peripheral surface of the end part of the cutter bar 9 along the circumferential direction, and a chip groove 10 is arranged between two adjacent blade parts. The cutting edge comprises a rake face 11, a flank face 12 and a combined cutting edge formed by intersecting the rake face 11 and the flank face 12, wherein an edge-shaped curve of the combined cutting edge comprises an inclined section, a concave section and an arc section which are sequentially arranged, one end of the inclined section, which is far away from the concave section, is inclined towards one side, which is far away from the central axis of the cutter rod, of the inclined section, the inclined angle of the inclined section relative to the central axis of the cutter rod is 3 degrees, the width of the concave section is 1mm, and the inflection points, which are connected among the inclined section 13, the concave section 14 and the arc section, are in smooth transition. The inclined section forms a conical surface on the relief surface 12; the concave section is formed as a cylindrical surface on the relief surface 12.

Further, the arc section comprises a middle arc section 15 and an end arc section 17, a straight line section 16 is arranged between the middle arc section 15 and the end arc section 17, and the straight line section 16 is positioned at the diameter of the arc section. The middle circular arc section 15 is connected with the concave section 14, and the end circular arc section 17 extends to the end of the blade part. The middle circular arc section 15 is formed on the drum-shaped surface on the clearance surface, the straight line section 16 is formed on the cylindrical surface on the clearance surface, and the end circular arc section 17 is formed on the spherical surface on the clearance surface.

Because the middle circular arc section 15 and the end circular arc sections 17 jointly form the main body structure of the ball pocket, the radiuses of the middle circular arc section 15 and the end circular arc sections 17 are the same, and the width of the straight line section 16 is 0.5mm; the inflection points of the connection among the concave section 14, the middle circular arc section 15, the straight line section 16 and the end circular arc section 17 are in smooth transition.

In order to facilitate chip removal, the chip removal groove 10 in this embodiment is a V-shaped groove; the rake face 11 is a side wall face of the junk slot.

Further, the combined cutting edge is arranged in the axial direction of the holder 9.

The corner of the cutter of the embodiment has a corner and is excessively rounded according to R0.2.

The metal entity retainer of the thrust angular contact ball bearing formed by the milling cutter is shown in fig. 5-8, and comprises a retainer annular body 1, wherein a plurality of ball pockets 2 for accommodating steel balls are uniformly distributed on the circumferential side wall of the retainer annular body 1, the ball pockets 2 are provided with inclined guide ball loading openings 3, and one side, close to a pocket bottom, of each guide ball loading opening 3 is provided with a ball locking table 4 for locking the steel balls. The guide ball loading port 3 is inclined in a direction away from the ball pocket hole, a flaring structure is formed, and the inclination angle of the guide ball loading port is 3 degrees. The ball locking table is a boss protruding out of the ball pocket, the self-locking amount of the ball locking table is smaller than 0.05-0.08 mm of the diameter of the steel ball, the width of the ball locking table is 1mm, and an outwards protruding cylindrical surface is formed in the ball pocket 2. The diameter of the ball pocket 2 is provided with a serial momentum platform 5, the serial momentum platform 5 is a straight platform, serial momentum of the serial momentum platform 5 is 0.5mm, a cylindrical surface is formed in the ball pocket 2, an intermediate circular arc portion 7 formed by the arc pocket surface is formed between the serial momentum platform 5 and the locking ball platform 4, and an arc pocket surface at the joint of the pocket bottom and the serial momentum platform 5 forms a bottom circular arc portion 8.

The retainer ring-shaped body 1 comprises a cylindrical body 1.1 and a conical body 1.2 which are integrally formed, wherein the cylindrical body 1.1 is connected with one end of the conical body 1.2 with a small caliber, and a plurality of ball pockets 2 are arranged on the conical body. Locking claws 6 are formed at both sides of the ball pocket 2 in the circumferential direction of the cage, and the guide ball loading port 3 and the locking ball table 4 are formed on side surfaces of the locking claws 6.

During processing, the inclined section 13 with the inclination angle of 3 degrees in the milling cutter forms the guide ball loading port 3 of the ball pocket hole of the retainer, the guide ball loading port is formed by designing an angle for the ball loading position of the outer diameter of the retainer, the angle is half angle 3 degrees, the integral strength of the retainer is not affected, the steel ball is loaded according to the guide ball loading port, the steel ball is not easy to scratch, and the milling cutter is convenient and quick.

The concave section 14 with the width of 1mm in the milling cutter forms a ball locking table 4 of the ball pocket of the retainer, the ball locking table 4 forms an outwards convex cylindrical surface in the ball pocket 2, the ball locking table 4 is used for leading the steel ball to enter the ball loading port of the retainer, the steel ball is manually pressed lightly, and the steel ball enters the pocket by elastic deformation of the retainer and does not fall out of the pocket. The design self-locking quantity is smaller than the diameter of the steel ball by 0.05-0.08 mm and the width of the steel ball by 1mm, so that the steel ball can be easily loaded and unloaded without falling the ball, clamping the ball, and scraping the ball by the retainer during bearing assembly. The size precision and the position precision of the lock ball are improved; and the rotation precision of the bearing and the dynamic balance of the bearing are improved. The ball locking table is in line contact with the steel ball, the contact position is high in strength, the ball locking table is not easy to wear, and a good ball locking effect is achieved.

The straight line section 15 with the width of 0.5mm in the milling cutter forms the serial momentum platform 5 of the ball pocket hole of the retainer, the serial momentum platform 5 forms a cylindrical surface in the ball pocket hole 2, the serial momentum platform 5 is designed according to the diameter size at the diameter of the ball pocket hole, the serial momentum value is 0.5mm, namely the width of the serial momentum platform 5 is 0.5mm, the serial momentum is moderate, namely the ball is not clamped during bearing assembly, the ball is not blocked, the bearing noise is not overlarge because of overlarge serial momentum, and the bearing rotation precision and the bearing dynamic balance are improved.

The arc sections in the milling cutter, namely the middle arc section 15 and the end arc section 17 respectively form a middle arc part 7 and a bottom arc part 8 of the retainer ball pocket, and form a main body structure of the ball pocket matched with the steel ball in size.

The round and smooth transition connection forming milling cutter tool is designed, the corner with the inflection point of the cutter is transited according to the R0.2 round angle, so that the pocket shape of the retainer is smoothly connected, the steel ball is prevented from being scratched when being filled into the pocket, the steel ball is not contacted with the pocket after being filled into the pocket of the retainer, the steel ball has omnibearing freedom degree in a locking port, and the rotation precision of the bearing and the dynamic balance of the bearing are improved.

The special forming milling cutter has a simple structure, can process all structures on the side surface of the ball pocket at one time, has high processing precision and processing efficiency, and can ensure the smooth processing of the thrust angular contact ball bearing entity retainer. During processing, firstly, a forming cutter is adopted to mill holes on a processing center, the size of a locking notch and the size of the position of the locking notch can be controlled according to the process requirements, and the batch quality stability is reliable. Secondly, the appearance quality of the processed retainer is good, and the appearance of the retainer is not damaged secondarily. Thirdly, the retainer ball pocket Kong Zisuo formed by milling can lock balls by manual force when the bearing is sleeved, so that time and labor are saved, and the bearing sleeve-sleeving efficiency is improved. And fourthly, the bearing fit effect is good, the precision is high, the bearing precision can reach P4-P2 level precision through the self-locking structure of the retainer through the bearing fit test, the bearing client is highly approved, and the bearing fit test is greatly popularized and used.

It should be noted that the detailed portions of the present utility model are not described in the prior art.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The foregoing list is only the preferred embodiments of the present utility model. Obviously, the utility model is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present utility model.

Claims (10)

1. A thrust angular contact ball bearing entity milling cutter for holder processing, its characterized in that: the cutting tool comprises a tool bar, at least one cutting edge part and a chip groove matched with the cutting edge part are arranged on the outer peripheral surface of the end part of the tool bar, the cutting edge part comprises a front tool face, a rear tool face and a combined cutting edge formed by intersecting the front tool face and the rear tool face, an edge-shaped curve of the combined cutting edge comprises an inclined section, a concave section and an arc section which are sequentially arranged, and one end of the inclined section, far away from the concave section, is inclined towards one side far away from the central axis of the tool bar.

2. The milling cutter for machining a solid cage of a thrust angular contact ball bearing according to claim 1, wherein: the circular arc section comprises a middle circular arc section and a tail end circular arc section, a straight line section is arranged between the middle circular arc section and the tail end circular arc section, the middle circular arc section is connected with the concave section, and the tail end circular arc section extends to the tail end of the cutting edge part.

3. The milling cutter for machining a solid cage of a thrust angular contact ball bearing according to claim 2, wherein: the straight line section is positioned at the diameter of the circular arc section.

4. The milling cutter for machining a solid cage of a thrust angular contact ball bearing according to claim 2, wherein: the middle circular arc section is formed on the drum-shaped surface on the rear cutter surface, the straight line section is formed on the cylindrical surface on the rear cutter surface, and the tail circular arc section is formed on the spherical surface on the rear cutter surface.

5. The milling cutter for machining a solid cage of a thrust angular contact ball bearing according to claim 2, wherein: the radius of the middle circular arc section is the same as that of the end circular arc sections, and the width of the straight line section is 0.5mm; the inflection points of the connection among the concave section, the middle circular arc section, the straight line section and the end circular arc section are in smooth transition.

6. The milling cutter for machining a solid cage of a thrust angular contact ball bearing according to claim 1, wherein: three blade parts are uniformly distributed along the circumferential direction, and chip grooves are arranged between two adjacent blade parts.

7. The milling cutter for machining a solid cage of a thrust angular contact ball bearing according to claim 1, wherein: the chip removal groove is a V-shaped groove; the front cutter surface is a side wall surface of the chip removal groove.

8. The milling cutter for machining a solid cage of a thrust angular contact ball bearing according to claim 1, wherein: the combined cutting edge is arranged along the axial direction of the cutter bar.

9. The milling cutter for machining a solid cage of a thrust angular contact ball bearing according to claim 1, wherein: the inclination angle of the inclined section relative to the central axis of the cutter bar is 3 degrees, the width of the concave section is 1mm, and the inflection points of the connection among the inclined section, the concave section and the circular arc section are in smooth transition.

10. The milling cutter for machining a solid cage of a thrust angular contact ball bearing according to claim 1, wherein: the inclined section is formed on a conical surface of the clearance surface; the concave section is formed on a cylindrical surface on the flank surface.