JPS61115625A - Production of double layer bearing with flange - Google Patents

Abstract

PURPOSE:To form a chamfering without causing a cut, shear drop and burr on the end face of a cylindrical part and the peripheral edge part of the flange part by forming in advance a V groove on the stock blanking part in the production of the bearing whose cylindrical part and flange part are unified from the stock of strip shape for a double layer bearing. CONSTITUTION:The small and large circular grooves 41, 42 which are co-axial and opposed respectively to the surface and backface of the stock 27 are formed with leaving connecting parts 43', 43 respectively by the upper and lower dies 22, 22' having cut edges 21, 21' respectively with feeding a strip shaped stock 27 for double layer bearing to a metal die 20. A round hole is then pierced with shearing the connection part 43' on the circular part 44 which is surrounded by the groove 41 by a burring punch 23 and a cylindrical part 45 is in succession formed with extending the peripheral edge part of the round hole into the burring die 24. A flange part 46 is then formed by separating from the blank 27 with shearing the connection part 43 by a stamping punch 25 and die 26. The bearing 40 double layered with flange on which the bevelings 47, 47' by the slope of the grooves 41, 42 are formed on the end face of the cylindrical part 45 and the peripheral edge part of the flange part 46 is thus obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a multilayer bearing with a flange, and particularly involves cutting the end surface L of a cylindrical portion and the peripheral edge of a flange portion. This article relates to a method of manufacturing a multi-layer bearing with a flange that can be completely chamfered without chamfering.

``Prior art'' Conventionally, the manufacturing method for multi-layer bearings with flanges was to press a strip-shaped multi-layer bearing material with the entire coating layer on the backing metal, and then punch out a blank material to predetermined dimensions. The main method used is to wind the entire cylindrical shape and then curl one end to form the flange.The flanged multilayer bearing (1) obtained by this method is As shown in Figure 15, the cylindrical part (2)
After forming the flange part (3), the flange part (3) is provided.
It opens in a fan shape at the joint part [code (4) in the figure] and the large part (
4) occurs.

This large part (4) that occurs in the flange part (3) is caused by the fact that the role of the flange part in a bearing with a flange is that it stops the bearing from rotating, especially in thin-walled bearings such as multi-layer bearings. Alternatively, it has a secondary function such as preventing extraction, but since it is mainly used to cope with thrust loads, it does not pose a significant hindrance to normal use.

However, in this multi-layer bearing with a flange (V), because the flange (3) has a large part (4), if a thrust load accompanied by an impact acts, it may cause damage to the mating shaft material. (2) The flange is easily deformed, making it difficult to obtain a good sliding surface. (2) Having a cutout is problematic, and the commercial value is reduced.

Also, the collared multilayer bearing (1) is usually 1 yen? @ Department (2)
On the end face L and the peripheral edge of the flange (3), (1) Prevent local contact with the mating shaft material, (2) Ensure normal contact of the mating shaft material with the bearing sliding surface.

■, Makes it easier to insert the mating shaft material into the bearing, ■, Makes press-fitting into the housing of the bearing easier, ■ In addition, the presence of corners (edges) VC causes handling inconveniences. However, chamfering is generally done by cutting, which requires seven separate steps, increases manufacturing costs, and can cause problems such as being coated by chips generated during cutting. There are also problems such as being buried in the layer, deteriorating the performance as a bearing, and increasing the so-called coefficient of friction L and wear i.

A technique useful for solving these problems, particularly those relating to most of the flange, is disclosed in Japanese Patent Laid-Open No. 53-64142.

To be more specific, the multilayer bearing with L eel flange (1
) can be obtained by forming the circular joint part (5) and the flange part (6) separately, and then welding them together at the 1) Fij part [tooth width code (B)]. be.

However, with this method, a multilayer bearing with a flange (1) in which the flange part (6) does not have a large part is obtained, but the cylindrical part (5) and the flange part (6)
) Prevents damage to the coating layer due to VC welding heat during full welding
I. There is a problem that the welding work requires advanced technology because it is necessary to chamfer the cylindrical part (5) and the flange part (6). Since this is done by cutting, the problem of chips generated during cutting being buried in the coating layer and degrading bearing performance has not been solved at all.

Furthermore, the applicant also has a problem with most of the tsuba. After solving this problem, in Japanese Patent Application No. 171,764/1987, we proposed a complete method for manufacturing a multilayer bearing with a flange as shown in the 13th case.

In detail, this method involves punching out a band-shaped material for multi-layer bearings using a blank press with a predetermined size, winding it into a cylindrical shape to completely form the cylindrical part (7), and then forming the flange. Part (8
) is formed on the back surface of one end by cutting, and this part is compressed in a closed mold, and at the same time as the edge diameter is enlarged, plastic flow stone is applied in the radial direction to form a joint part (reference number in the figure). (C
) ) A multilayer bearing with a flange (1) having a flange portion (8) without a large portion in contact with i is obtained.

However, even with this method, a multilayer bearing with a flange (1) without a large portion of the flange (8) can be obtained; Since chamfering is done by cutting, the problem of chips generated during cutting being buried in the coating layer and reducing the bearing performance has not been solved, and the flange part (8) is designed to prevent the formation of large parts. A method for solving the above-mentioned problems in which the coating layer is prone to damage (peeling) due to plastic flow is shown in Fig. 9 in JP-A-59-66-938. A method of manufacturing a multilayer bearing with a flange has been proposed.

That is, in this method, an opening (10) is formed using a strip-shaped multilayer bearing material (9) using a K punch, and then the periphery of the opening (10) is expanded using a burring punch to form a cylindrical portion ( 11) Form.

Next, the entire peripheral edge of the cylindrical portion (11) is punched to form a flange portion (12) 't'', thereby obtaining a flange-equipped multilayer bearing (1) as shown in Fig. 10. It is.

In the figure, (13) is the opening (10) 't=
The scrap material (14) produced when installing is the material for multilayer bearings (9
) is the punched hole of the bearing (1).

However, the flanged multilayer bearing obtained by this method (1)
Compared to the conventional method, there is no seam, and the flange (1
2) While it is possible to obtain the product without the need for advanced technology or tl, it is possible to avoid the formation of large parts on the cylindrical part (11) and the periphery of the flange part (12) as shown in Figures 11 and 12. Peeling of the tarli (15) and burrs (16), (17) and the coating layer (18) (marked side in the figure) is likely to occur, and the sag (15) and burrs (16), (17) are likely to occur.
Furthermore, peeling of the coating layer (18) has the problem of completely reducing commercial value and dimensional accuracy.

At the ninth point, the end face L of the cylindrical part (11) and the peripheral edge of the flange part (12) are machined with a cutting process VcZ as in the conventional case.
5) and burrs (16), (17) 1&: A friend who applies chamfering to be removed [in the figure, broken line, symbol (G)],
There is no solution to the problem of deterioration in bearing performance due to chips generated by the cutting process.

"Problems to be Solved by HA-A" In view of the above-mentioned problems, the present invention is designed to prevent sagging and burrs from occurring on the end face of the cylindrical part and the peripheral edge of the flange, and to cut the parts. A technical object of the present invention is to provide a method for manufacturing a multilayer bearing with a flange that can be chamfered without chamfering.

"Means for Solving the Problems" The present invention is an attempt to solve the above problems, and is based on the following technical means.

That is, in a method for continuously manufacturing a flanged multilayer bearing having a cylindrical part and a flange integrally connected to the cylindrical part from a band-shaped multilayer bearing material having a coating layer provided on a backing metal, Cutting blade? A step of forming a concentric small circle V@ and a large circle V@ facing each other on the front and back surfaces of the material for a multilayer bearing using the upper and lower dies, leaving a connecting part on each side, and Connection st between small circular V grooves - For purling punch: L
shearing and boring seven circular holes, and then extending the peripheral portion of the circular hole into a paring die to form a cylindrical part;
The connecting part between the large circular V grooves facing each other on the front and back surfaces is punched out and sheared using a bunch Vcl to shape the flange. This method employs a method of forming a chamfer with a #I slope.

In the present invention, the material for a multilayer bearing refers to a material that is completely coated with a material having excellent lubricity, such as a soft metal or a synthetic resin, directly or through a porous sintered alloy layer on a backing metal made of strip-shaped steel or the like. [Function] By adopting the above-mentioned means, the present invention has a coating layer formed by depositing a self-lubricating sintered alloy on a backing metal. A multilayer bearing with a flange is obtained in which a chamfer is formed on the end face L and the peripheral edge of the flange without generating chips, sagging, or burrs.

[Implementation row]

Hereinafter, embodiments of the present invention will be explained in detail in terms of tooth surfaces.

(20) f1 A mold used for manufacturing the flanged multilayer bearing of the present invention, the mold (20) has cutting blades (21) with opposing cutting edges on the upper and lower surfaces, C2f)k upper and lower dies (22). ,
(22') and purling processing? A bar link punch (23) and a die (24) to perform the punching process, a punch (25) and a spindle die (26) to perform the punching process, and a strip-shaped multilayer bearing material (27) in which a coating layer is formed on the backing metal. t
- a blank holder (28) for holding.

The mold (20) is attached to the upper holder (2) of the press machine.
9) upper die (22), burring bunch (23),
Punch (25) and blank holder (28)
The lower die (22') is placed in the lower holder (30), and the upper dies (24) and (26) are placed in the upper holder (29), respectively. Dai (22) O-L Hi Bunch (23)
, (25).

In the figure, (31) and (31) are push-up books of the multilayer bearing material (27), and (32) and (32) are suppressors of the blank holder (28).

Next, a method for manufacturing the flanged multilayer bearing (40) of the present invention will be described in detail.

That is, in manufacturing the flanged multilayer bearing (40), a band-shaped multilayer bearing material (27
)? Feed, -f: Cutting edge (21), (21'
, ) i are machined in the upper and lower dies (22) and (22') to form concentric small circular V grooves (41) and large circular VlW (42)' facing each other on the front and back surfaces of the material (27), respectively. Connecting portions (438 (43')) Th are left to form.

Next, use the burring punch (23) to make a small circle V @ (41)
The connecting portion (43') left between the V-grooves (41) is sheared to form a circular hole (44) surrounded by a circular hole (44). ) to form a cylindrical portion (45) e.

Next, the connection part (43) of the large circular V groove (42) facing each other on the front and back surfaces is sheared using a punch (25) and a die (26) to separate the material (27) and the collar part (46). )! By forming a cylindrical part (4) as shown in FIG.
Large and small circular V grooves (
41).

Chamfering L on the slope of (42) (47), (47')
This is a multilayer bearing with a flange (40) in which a flange is formed.

By adopting this L-shaped manufacturing method, the cylindrical part (45)
The end face and the peripheral edge of the flange (46) are free from sagging and burrs as shown in FIGS. A flange-equipped multilayer bearing (40) is obtained which is stretched in the chamfered (47) and (4'IP) portions by the two compressions and prevents the coating layer (48) from peeling off in these portions.

Here, in the manufacturing process of the flanged multilayer bearing (40), large and small circular V grooves (41), (42), and (7) shape g processing,
The forming blade loe of the cylindrical part (45) and the separation processing of the collar part (46) from the raw material (27) are performed simultaneously in one stroke of the press, and the raw material (27) k is separated in each stroke of the press.
The blank holder (28) is used to fix the blank in the mold (20) to perform the processing, and after processing, the blank holder (28) is fixed in the mold (20).
Unfix the material (27) and press the lower holder (30) with the push-up body (31).
! (41), (42) Processing L re-ring processing, this process is carried out continuously by repeating the operations of sequentially processing and feeding the material to the feed device. It is.

In the present invention, the upper and lower dies (22), (22')
The shape of the cutting blades (21) and (2f) provided in K are cylindrical (
45) Chamfering (47) of the tsuba (46) - (4'
7') Shape and the cutting edge (21).

Considering the strength (durability) in (2), the blade edge angle θ total θ
= 15 to 75 degrees is desirable (see Fig. 4).

In addition, the diameter of the small circular V-groove (41) forming the end of the cylindrical portion (45) is determined by the amount of extension of the cylindrical portion (45) and the diameter of the small circular V-groove (41) that forms the end of the cylindrical portion (45). 45)
It is set appropriately within a range that does not cause any fringes at the edges.

Figures 6 and 7 show a multilayer bearing with a flange (
40) is shown.

That is, in this embodiment, a fixing protrusion (49)' that prevents rotation of the bearing (40) is integrally formed on the flange (46), and the fixing protrusion (49)' that prevents rotation of the bearing (40) is integrally formed in the vicinity of the barring die (24) of the mold (20). A cushion bottle (50) is supported and arranged on the lower holder (30), and a protrusion bottle (51) is supported and arranged on the upper holder (29) at a position corresponding to the cushion bottle (50). =S, Purring process: At the same time as forming the so-called cylindrical part (45), the back side of the flange part (46) is pressed with a cushion pin (50), so the hexagonal protruding pin ( 51), and the fixed protrusion with a bottom is designed to protrude and fully suppress and extend the part.
(49) The coating layer can be formed integrally without damaging the entire coating layer.

In this process, the fixing protrusion (49) is integrally provided on the flange (46) as a means to prevent rotation of the bearing (40). It is also useful because it does not require a knock bottle or the like.

FIG. 8 shows a flange-equipped multilayer bearing (40) of yet another embodiment.
This shows a method of manufacturing.

That is, in this embodiment, the mold (20) t-large and small circular V grooves (4
1), (42) i Separately formed small circular V groove (4
1) t' Upper and lower dies forming shadows (52), (52 and large circle V Fy (42) 'r Upper and lower dies forming shadows (53)
, (53') and the mold (20) [
j Multi-layer bearing with flange (40) (D I!l 'lf
i, the method is to make a small circle V% with the upper and lower dies (528 (52))
(41), then burring punch (23)
The cylindrical part (45) is formed using the L die (24), and then the upper and lower dies (53) and (53') are used to form the large circular V groove (42).
) Form the material (27) using a punch (25) and die (26). The flange portion (46)' is formed by punching and separating.

In order to configure this L, the mold (20) is used during machining.
Since the load acting on the mold (20) is equalized, the durability of the mold (20) can be improved.

〔Effect of the invention〕

In addition to the above-mentioned means, the present invention has the following effects.

That is, large and small V-grooves facing each other are formed on the front and back surfaces of the material for a multi-layer bearing, leaving connecting portions on each side, and the connecting portions left between the small circular V-grooves are sheared to form circular holes t-4 and 4. A cylindrical portion is formed by drilling and then elongating the peripheral portion of the circular hole by burring, and then a connecting portion is left between the large circular V grooves. We adopted a method to obtain a flanged multilayer bearing by shearing the flanges to form the flanges. It is possible to prevent the occurrence of wobbling, and to form an arbitrary chamfer L on the slope of the V-groove of the large and small mill without cutting.

■My friend who doesn't do a good job of cutting, is the bearing performance t? No cutting chips are generated.

(2) Large and small circles Vlt are formed to leave connecting portions, and the connecting portions are sheared.The coating layer is extended to the ends by the V-grooves, and peeling at the ends can be prevented.

■ Rounding is performed sequentially, allowing for mass production.

Is it a great effect with excellent economy and productivity? It is something that you have.

[Brief explanation of drawings]

Part 1: Explanation of the manufacturing method of the multi-layer bearing with flanges of the present invention; Fig. 2 is a perspective view showing the manufacturing process of the multi-layer bearing with flanges in Fig. 1; and Fig. 3: FIG. 4 is a sectional view showing a multilayer bearing with nine flanges obtained by the manufacturing method of the present invention.
FIG. 5 is an enlarged view of the H part in the figure, FIG. 5 is an enlarged view of the construction part in FIG. Manufacturing process of multi-layer bearing with flange in 6 prisoners? The perspective view shown in FIG.
The figure is a perspective view showing a conventional method for manufacturing a multilayer bearing with a flange.
FIG. 10 is a cross-sectional view showing a flanged multilayer bearing obtained by the construction method shown in factor 9, and FIG. 11 is a cross-sectional view showing D in FIG. 10.
Fig. 12 is an enlarged view of E part in Fig. 10;
FIGS. 13 to 15 are perspective views showing other conventional multilayer bearings with flanges. 20: Mold 21.21': Cutting edge 22°52.53: Upper die 22', 52', 53': Lower die 23: Burring punch 24: Burring die 25: Punching haunch 26: Punching die 27: Material for multi-layer bearing 40: Multi-layer bearing with flange ・41: Small circle V groove 42: Large circle v@ 43.
43': Ream MW45: Circle section 46: Flange section 47.47': Chamfer 48: Covering layer patent applicant
Oiles Industries Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] In a method for continuously manufacturing a flanged multilayer bearing having a cylindrical portion and a flange integrally connected to the cylindrical portion from a band-shaped multilayer bearing material having a coating layer provided on a backing metal, the cutting blade is A process of forming concentric small circular V-grooves and large circular V-grooves facing each other on the front and back surfaces of a material for a multilayer bearing using upper and lower ties with small circle V
The connecting portion between the grooves is sheared with a burring punch to form a circular hole, and the peripheral portion of the circular hole is then extended into a paring die to form a cylindrical portion, and a large circle V facing each other on the front and back surfaces is formed. It is characterized by forming a flange by shearing the connecting part between the grooves with a punch, and forming chamfers on the end face of the cylindrical part and the peripheral edge of the flange by the slopes of large and small circular V grooves. Manufacturing method of multilayer bearing with flange.