JP2875772B2 - Method of manufacturing wave retainer for ball bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method for producing a waveform cage for a ball bearing.

[0002]

2. Description of the Related Art Conventionally, this type of ball cage for ball bearings has
A pair of corrugated rings having a concave spherical ball holding portion and a flat portion alternately are arranged facing each other with balls loaded between the ball holding portions, and the flat portion is caulked and fixed by rivets to be integrally connected. It has been made to be.

[0003] The manufacture of the above-described ball cage for ball bearings is usually carried out.
By pressing a steel plate or the like, a corrugated ring having concave spherical ball holding portions and flat portions alternately and having a rivet insertion hole in the flat portion is formed. Then, rivets are inserted and arranged in a rivet insertion hole formed in each flat portion of one of the corrugated rings in a press-fitting state. Next, the other undulating ring is arranged on this undulating ring in an opposed manner, and the ball is held between the opposing concave spherical ball holding portions, and the leading end of the rivet is inserted into the corresponding rivet of the other undulating ring. This is completed by inserting the rivet into the hole and caulking the rivet.

[0004]

The rivet insertion hole formed in the flat portion in the step of pressing the corrugated ring,
Usually, it is stamped out from the outside, that is, the side opposite to the side holding the ball. Therefore, the peripheral portion of the rivet insertion hole on the opposing surface side of both corrugated rings is on the burr generation side associated with the punching process.

[0005] In Thus, as described above, when inserting place rivets into the rivet insertion hole of one of the waveforms ring, Sakomianashu
Due to the effect of the burrs on the edge, the rivet axis may shift,
Rivets were often tilted.
When the rivet axis is displaced or the rivet is tilted in this way, it is difficult to insert the leading end of each rivet into the rivet insertion hole at the corresponding position of the other wavy ring disposed opposite thereto. There was a point.

Further, even if there is no such deviation of the axis of the rivet, since the burr is present at the periphery of the rivet insertion hole at the corresponding position of the other wavy ring, the rivet tip is inserted through the insertion hole. In doing so, the tip may be caught on the burr. Therefore, the insertion work was inconvenient.

[0007] As described above, there is a problem that burrs on the peripheral portion of the rivet insertion hole generated when punching the rivet insertion hole hinder the operation of setting the rivet on the corrugated ring.

In addition, if there are burrs on the opposing surfaces of both corrugated rings in the peripheral edges of both ends of the rivet insertion hole, the adhesion between the flat portions of both corrugated rings is impaired. For this reason, there is also a problem that the so-called pocket dimensional accuracy between the concave spherical ball holding portions is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide a method of manufacturing a ball bearing waveform retainer which can be easily manufactured and assembled and which can be made with high accuracy. And

[0010]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a concave spherical ball holding portion (10) and a flat portion (11).
And a rivet insertion hole in the flat portion (11).
(12) forming a pair of corrugated rings (1) and (2) with perforations
The two corrugated rings (1) and (2) are connected to the ball holding portion.
(10) When the ball (3) is loaded between (10) and
Rivets in the rivet insertion hole (12)
(4) Inserting and crimping the ball cage wave retainer
In the manufacturing method, the two wavy rings (1) and (2) are
Before riveting with bet (4), the rivet
At least proximal end is conical inserted into insertion hole (12)
Insertion portion that Teisu the Jo (P1) and is connected to the proximal end of the insertion portion
The rivet insertion hole (12) comes into contact with the peripheral flat portion (11).
And a flat holding part (P2) to be in contact therewith.
1) and the flat portion at the boundary between the flat holding portion (P2).
A corner having a radius of curvature of 20 to 40% of the thickness of the portion (11)
Rounded portion (P3) using a punch (P) which are formed, the
Insert the insertion portion (P1) of the punch (P) into each of the rivet insertion holes.
Insert (12) from the burr generation side and
The flat part (11) on the opposite side of the insertion hole is die (D).
In the fixed state, the corner radius (P3)
The peripheral edge (12a) of the rivet insertion hole (12) is face pressed.
By shaping, a bar having an outer peripheral edge (12a) is formed.
(10) is crushed and integrated with the main body of the wavy ring.
To form the outer peripheral edge (12a) into a curved surface without burrs.
It is characterized by that.

As the punch, the insertion portion (P1)
It is desirable to use the one in which the angle of the conical surface is set in the range of 5 to 15 degrees .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on illustrated embodiments.

The ball bearing wave retainer according to this embodiment is
A pair of corrugated rings (1) and (2) arranged opposite to each other, a ball (3) interposed therebetween, and a rivet (4) for caulking the corrugated rings (1) and (2). It consists of.

[0014] The respective waveforms ring (1) (2), as shown in FIGS. 1 and 2, a circular-shaped ring having a predetermined width having a concave spherical ball retaining portion (10) and the flat portion (11) alternately It presents a body. A rivet insertion hole (12) is formed in each of the flat portions (11). This wavy ring (1)
(2) is formed, for example, by pressing a steel plate.

As shown in FIGS. 3 and 4, the two corrugated rings (1) and (2) are provided with the respective ball holding portions (10).
(10) Arranged facing each other with the ball (3) loaded between them
The flat portions (11) and (11) are connected and integrated by rivets (4) inserted into rivet insertion holes (12) and (12) provided in the flat portions.

At the time of this assembling, for example, FIGS.
First, a rivet (4) is inserted and fitted into the rivet insertion hole (12) of one of the corrugated rings (1). Next, the corrugated ring (1) and the other corrugated ring (2) are arranged facing each other with the ball (3) loaded between the ball holding portions (10) and (10), and each rivet ( The tip of 4) is inserted into a rivet insertion hole (12) formed at a position corresponding to the other wavy ring (2), and the rivet (4) is caulked. Thereby, the two wavy rings (1) and (2)
Is connected and integrated with the ball (3) loaded between the ball holding portions (10).

In the present invention, each rivet insertion hole (12) formed in the flat portion (11) of each of the corrugated rings (1) and (2).
Of the burr generation side, that is, the periphery (12a) which is usually located on the opposite surface side of the two wavy rings (1) and (2).
To the peripheral portion (12a)
Is molded into a predetermined shape without burrs. The reason for carrying out such surface pressing is as follows.

That is, as described above, the corrugated rings (1) and (2) are manufactured by press-forming a steel plate, and the rivet difference formed on the flat portion (11) in the processing step. The insertion hole (12) is usually stamped from the outside, that is, from the side opposite to the side holding the ball (3). Therefore, the peripheral edge portion (12a) of the rivet insertion hole on the opposing surface side of the two corrugated rings (1) and (2) is on the burr generation side associated with the punching process. When the rivet (4) is inserted into the rivet insertion hole (12) having the burr (14) in this way, the rivet shaft center shifts or the rivet (4)
May be inserted and arranged in an inclined state.

Also, when inserting the leading end of the rivet (4) into the rivet insertion hole (12) at the corresponding position of the other corrugated ring (2) disposed opposite thereto, the insertion hole is also required. (1
If the burrs (14) are present at the peripheral portion of 2), the insertion work becomes difficult. Furthermore, since the burr (14) is provided in the rivet insertion hole (12) on the opposing surface side of the two wavy rings (1) and (2), when the two wavy rings (1) and (2) are connected and integrated. ,
A burr (14) is interposed between the flat portions (11) and (11) on the periphery of the insertion hole (12). Therefore, there arises a problem that the so-called pocket dimensional accuracy between the concave spherical ball holding portions (10) and (10) is deteriorated because the adhesion between the two corrugated rings (1) and (2) is impaired.

Therefore, it is necessary that the face pressing process be performed before the two corrugated rings (1) and (2) are caulked with the rivets (4).

This face-pressing process is performed by a face-pressing punch (P) inserted into the rivet insertion hole (12).
And a die (D) for supporting from the opposite side of the insertion hole (12).

As shown in FIGS. 5 and 6, for example, as shown in FIGS. 5 and 6, the punch (P) for face pressing is continuously connected to an insertion portion (P1) inserted into the rivet insertion hole (12) and a base end thereof. And a flat holding portion (P2) abutting on a peripheral flat portion (11) of the insertion hole (12), and a boundary portion between the insertion portion (P1) and the flat holding portion (P2). In which a corner radius portion (P3) is formed.

[0023] The insertion portion (P1), it is necessary that at least the base end side is one that exhibits a circular cone shape.

The angle of the conical surface at the base end, that is, the angle between the conical surface and the inner peripheral surface of the rivet insertion hole (12) is 5 to 5.
It is desirable to set the angle to 15 degrees. When the angle is less than 5 degrees, the insertion portion (P1) of the punch (P) is easily caught on the periphery of the rivet insertion hole (12) when the punch (P) is inserted into the rivet insertion hole (12). This is because the insertion work becomes slightly troublesome. Conversely, if the angle is set to a large angle exceeding 15 degrees, the insertion work becomes easier, but the molding of the peripheral portion of the insertion hole is inferior. The most preferred angle is on the order of 10 degrees.

Further, the insertion portion (P1) of the punch (P)
Is based on the reference diameter, that is, the virtual intersection formed by the conical surface of the insertion portion (P1) and the flat surface of the flat holding portion (P2).
It is desirable to set the diameter of the reference circle to be the same or substantially the same as the size of the die for forming the rivet insertion hole. This is because if it is too large or too small, molding defects of burrs are caused. By setting the same or substantially the same, the root portion of the burr (14) can be located at the center of the corner round portion (P3), and the insertion hole having the burr (14)
The periphery is uniformly pressed by the rounded portion (P3).

Further, Earl size of the corner rounded portion (P3), i.e. the radius of curvature, the Tamaki Namikata (1)
It is necessary to set the thickness in the range of 20 to 40% of the thickness of (2).
It is important. If it is less than 20%, the burr forming effect is inferior, and the burr simply falls down or runs off the corner radius (P3). On the other hand, if too large, meat more than may occur in more than necessary, Bas
This is because traces of (14) remain. Most preferably, the size is of the order of 30%.

As shown in FIG. 6, the insertion portion (P1) of the punch (P) is inserted into the burr of each rivet insertion hole (12) by using the surface pressing punch (P). The rivet insertion hole (12) is inserted into the rivet insertion hole (12) from the opposite surface side of the two corrugated rings (1) and (2) on the generation side, and the flat portion (11) of the insertion hole peripheral edge on the opposite side is die ( In the state fixed in D), the burrs (1) provided on the peripheral edge (12a) of the rivet insertion hole (12) by the corner radius (P3).
4) is crushed and integrated with the main body of the corrugated rings (1) and (2)
And the peripheral portion (12a) of the insertion hole has no burr (14).
Form into a curved surface .

Thereafter, as described above, the rivet (4) is inserted and fitted into each rivet insertion hole (12) of one corrugated ring (1).

Next, the corrugated ring (1) and the other corrugated ring (2) are arranged facing each other with the ball (3) loaded between the ball holding portions (10), and each rivet ( The tip of 4) is inserted into a rivet insertion hole (12) formed at a position corresponding to the other wavy ring (2), and the rivet (4) is caulked. Thereby, the both waveforms ring (1) (2), the ball holding portion (10) (10) ball between (3) is integrally connected in a state of being loaded.

In the connected and integrated state, the peripheral portion (12a) of the rivet insertion hole (12) located on the opposite surface side of the two corrugated rings (1) and (2) is formed into a predetermined shape without burrs. Both corrugated rings (1) (2)
And it is excellent in the flat portion (11) (11) Adhesion therefore concave spherical ball holding portion of the other (10) (10) the so-called pocket size precision between each other.

[0031]

According to the method of manufacturing a wave bearing retainer for a ball bearing according to the present invention, at least the base end side inserted into the rivet insertion hole is provided before the two wave rings are riveted.
Conical insertion part (P1) and connected to the base end of the insertion part
And a peripheral flat portion (11) of the rivet insertion hole (12).
And a flat holding portion (P2) abutting on the insertion portion.
(P1) and the flat holding portion (P2)
It has a radius of curvature of 20 to 40% of the thickness of the flat portion (11)
Using a punch (P) with a rounded corner (P3)
Then, the insertion portion (P1) of the punch (P) is
Insert into the insertion hole (12) from the burr generation side,
The flat part (11) on the periphery of the insertion hole on the opposite side is
In the state fixed in (D), the corner radius (P3)
The rim portion (12a) of the rivet insertion hole (12)
By face pressing, the outer peripheral edge ( 12a)
Burrs (10) are crushed and one
And the outer peripheral edge (12a) becomes a curved surface without burrs
It is characterized by being molded .

Therefore, the peripheral edge of the rivet insertion hole on the burr generation side has no burr, so that when the pair of corrugated rings forming the retainer are connected and integrated by rivets, the burr is not formed.
The deviation or inclination of the rivet the rivet axis based on impact without having to originating <br/> production, it can be assembled manufacturing operations easily. In addition, the burrs are not interposed between the flat portions of the corrugated ring, so that the adhesion between the flat portions of the two corrugated rings can be improved. The so-called pocket dimensional accuracy between the parts can be excellent.

As a punch, the radius of curvature of the corner radius is half.
The Empire Rukoto used as the diameter is set to a value of plate 20-40% range for the thickness of the flat portion of the waveform ring, rather than being simply crushing burrs of the rivet insertion hole periphery, the body parts and good integration formed press surface of the insertion hole periphery a curved I tomb the
Can form to Rukoto, it can be excellent particularly molding effect without fear of dropping or the like burrs.

[Brief description of the drawings]

FIG. 1 is a plan view of a wavy ring in a state where rivets are temporarily inserted.

FIG. 2 is a sectional view taken along line II-II of FIG.

3 shows a state before you connected the both waveforms ring, is a fragmentary cross-sectional view along the circumferential direction.

[Figure 4] is caulking by both waveforms ring gully bet
It is principal part sectional drawing along the circumferential direction which shows the state which connected and integrated .

FIG. 5 is an enlarged cross-sectional view showing a state immediately before a punch is inserted into a rivet insertion hole of a corrugated ring in a face pressing step .

FIG. 6 is an enlarged cross-sectional view showing a state in which the rivet insertion hole peripheral portion of the corrugated ring is pressed using a punch and a die.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Corrugated ring 2 Corrugated ring 3 Ball 4 Rivet 10 Concave spherical ball holding part 11 Flat part 12 Rivet insertion hole 12a Burr generation side peripheral part 14 Burr P punch P1 Insertion part P2 Flat holding part P3 Corner round part

Claims (2)

(57) [Claims] 1. A pair of corrugated rings each having a concave spherical ball holding portion (10) and a flat portion (11) alternately and a rivet insertion hole (12) formed in the flat portion (11). 1)
(2) is formed, and these two corrugated rings (1) and (2) are arranged facing each other with the ball (3) loaded between the ball holding portions (10) and (10), and the rivet insertion hole is formed. (12)
A method for manufacturing a ball cage for a ball bearing, in which a rivet (4) is inserted into a rivet (4), and the rivet insertion hole is provided before the two undulated rings (1) and (2) are crimped with the rivet (4). (12) is inserted into the insertion portion of at least the base end side exhibits a conical and (P1), the peripheral flat portion of the rivet insertion holes is connected to the proximal end of the insertion section (12) (11) This And a flat holding part (P2) to be in contact with,
The curvature of 20 to 40% of the plate thickness of the flat portion (11) is formed at the boundary between the insertion portion (P1) and the flat holding portion (P2).
Using a punch (P) to the corner rounded portion (P3) are formed with a radius, the insertion portion of the punch (P) and (P1) together with the insert from the burr side in the rivet insertion holes (12) Then, the flat portion (11) on the periphery of the insertion hole on the opposite side is die (D).
In a state where the rivet insertion hole (12) is fixed, the peripheral edge (12a) of the rivet insertion hole (12) is pressed by the corner radius portion (P3).
By molding, the burrs on the peripheral portion (12a) are formed.
(14) is crushed and integrated with the main body of the corrugated ring,
A method of manufacturing a wave bearing for a ball bearing, characterized in that the peripheral portion (12a) is formed into a burr-free curved surface . 2. The insertion part as the punch (P)
The angle of the conical surface in (P1) is set in the range of 5 to 15 degrees.
The method for manufacturing a ball bearing wave retainer according to claim 1 , wherein a specified one is used.