JPS641683B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of manufacturing a semicircular bearing from a multilayer material formed by integrally covering a sliding material on a steel plate.

[Conventional technology]

Conventionally, a multilayer semicircular bearing 1 as shown in FIG.
is a multilayer material in which a porous sintered layer is provided on a steel plate, and a synthetic resin material containing a filler is deposited on the porous sintered layer as a sliding material, or a sliding material is directly placed on the steel plate. A multi-layered material made of metal materials that have the same performance as those applied by sintering or welding, or a woven fabric containing a low-friction material used as a sliding material directly applied to a steel plate using an adhesive. A blank material is formed manually or mechanically from the multi-layered material in one device, and then transferred to another device to be formed into a semicircular shape. A manufacturing method is generally performed by providing a.

However, with this method, if the material from the previous process is not placed accurately in the next process, it may cause molding defects, making the work complicated and making it impossible to mass produce.Also, the sliding material may be damaged during moving and handling. There are problems such as coercion.

In view of these problems, a long multilayer material is fed in stages to a mold that has a blank forming section, a bending section, and a cutting section built in parallel. The technology to obtain a complete multi-layer semicircular bearing by continuously finishing the bearings without transferring them to another
For example, British Patent No. 1180742, Japanese Patent Publication No. 1180742,
It is disclosed in Japanese Patent Publication No. 14001, Japanese Patent Publication No. 56-41342, and Japanese Patent Publication No. 42767-1987.

That is, the technology of British Patent No. 1180742, as shown in FIGS. 20 and 21, feeds the long multilayer material 3 to the mold by a predetermined feed length in each stroke of the press. By doing this, V grooves 4 that face each other along the width direction are formed on the front and back surfaces of the multilayer material 3 using a mold to form a blank material 5, and then the blank material 5 is formed with a substantially semicircular female die. A substantially semicircular blank material 51 is formed by cutting and bending the V-groove 4 with a male die so as to partially leave a connecting portion.

Next, the blank material 51 is inserted into a male die 7 having a semicircular convex portion 6 as shown in FIG.
A complete semicircular blank material 511 is formed into a multilayer material 3 by a holder 9 having an inclined portion 8 on its upper surface for coining the end thereof, and a female die 11 having a semicircular concave portion 10. Formed while connected to.

After that, the blank material 511 is cut at the connection part from the multilayer material 3 to form the multilayer semicircular bearing 1.
This is what you get.

In addition, the technology of Japanese Patent Publication No. 46-14001 is as shown in Figs. 18 and 19.
is fed to the mold by a predetermined feed length every stroke of the press, thereby forming V grooves 4 facing each other along the width direction on the front and back surfaces of the multilayer material 3 with the mold, thereby forming the blank material 5. Next, the blank material 5 is cut along the V-groove 4 from the multilayer material 3 to form a plate-shaped blank material 5'.

Next, the blank material 5' is bent using a substantially semicircular female die and a male die to form a substantially semicircular blank material 51.
Then, as shown in FIG. 19, the blank material 51 is formed into a perfect semicircle using a male die 7 having a semicircular convex portion 6 and a female die 11 having a semicircular concave portion 10. Thus, a multilayer semicircular bearing 1 is obtained.

Furthermore, the technology of Special Publication No. 56-41342 is
As shown in the figure and FIG. 17, by feeding the elongated multi-layer material 3 to the mold by a predetermined feed length in each stroke of the press, the front and back surfaces of the multi-layer material 3 are A blank material 5 is formed by forming V-grooves 4 that face each other along the direction, and then the blank material 5 is cut using a substantially semicircular female die and a male die so that the V-grooves 4 are partially connected. By cutting and bending
A substantially semicircular blank material 51 is formed.

Then, as shown in FIG. 17, the blank material 51 is pressed between a male die 7 having a partially circular convex portion 12, a coining die 13 sandwiching the male die 7 from both ends, and a female die 11 having a semicircular concave portion 10. Then, the connecting portion is cut from the multilayer material 3 to completely separate it, and the multilayer semicircular bearing 1 is obtained by molding it into a perfect semicircle.

Furthermore, the technique disclosed in Japanese Patent Publication No. 58-42767, as shown in FIGS. 14 and 15, feeds the long multilayer material 3 to the mold by a predetermined feed length in each stroke of the press. V grooves 4 facing each other along the width direction are formed on the front and back surfaces of the multilayer material 3 using a mold to form a blank material 5, and then the blank material 5 is
A V-groove 41 larger than the V-groove 4 is formed by cutting and/or coining the V-groove 4 provided on the sliding material side of the blank material 5'' to form a complete blank material 5''.

Next, the blank material 5'' is inserted into a male die 7 having a semicircular convex portion 6, as shown in FIG.
By supporting the holder 9 having the coining part 14 and the female die 11 having the semicircular recess 10,
The multilayer semicircular bearing 1 is obtained by cutting the multilayer material 3 along the V grooves 4 and 41 and molding it into a complete semicircle. After these are formed into a perfect semicircle, a positioning convex part is formed at the end or center by partially cutting the end and bending it outward, or by punching a small diameter hole in the center. It is formed by providing a punched hole and protruding the punched hole outward by burring.

In this way, the multi-layer material 3 is transferred to the mold having a blank forming part, a bending part, and a cutting part in each press stroke by a predetermined feed length so that the material 3 passes through each process sequentially. By adopting a method of molding by feeding the multilayer material in a connected state, (1) reliable positioning can be achieved by feeding the multilayer material in a state where it is partially connected, and molding defects due to misalignment can be prevented.

(2) Since it is formed continuously, it has the advantage of being easy to work with and excellent in mass production, as well as being able to obtain multi-layer semicircular bearings of consistent quality without damaging the workpiece.

[Problems to be solved by the present invention]

However, even in these conventional methods, the V-groove portion formed in the multilayer material breaks during the feeding operation in the mold, and more specifically, the connection formed by leaving a part of the V-groove during bending. When a part is deformed, the part becomes fatigued and separates naturally, resulting in incomplete positioning, resulting in poor molding and even damage to the mold.Also, the protrusion for positioning may partially cut off the end. Alternatively, since the central portion is protruded by burring, burrs and peeling of the sliding material occur in this portion, resulting in problems such as deterioration of bearing performance.

[Means to solve the problem]

In view of the above problems, the present invention takes the following measures.

That is, a multi-layer material formed by integrally covering a sliding material on a steel plate is sent to a mold with upper and lower V-shaped grooves having V-shaped cutting edges on the upper and lower surfaces. They are opposed to each other along the direction, and the cutting depth gradually decreases at the center of the width of the material compared to both ends.
A blank material is formed by providing a V-groove that forms a thick section with a large drum-shaped cross section, and then the blank material is formed into a V groove by using a rough bending punch with a concave curved surface and a rough bending die with a convex curved surface. The groove is cut so as to leave a thick portion of the V-groove, and both ends in the width direction are bent into a substantially semicircular shape to form a substantially semicircular blank.

Next, the ends of the approximately semicircular blank are sectioned into semicircular shapes using an intermediate bending punch having a semicircular concave portion and an intermediate bending die having a semicircular convex portion. A semicircular blank is formed by bending, and then a finishing punch with a semicircular concave portion and a finishing die with a semicircular convex portion are used to form a perfect semicircle and coin the edges. Perform final bending to form a semicircular blank.

After that, the blank material is completely separated from the multilayer material by cutting the thick part of the V-groove using a cutting punch and die, and is then cut by a pressing pin and a bearing pin contained in the cutting punch and die. In this method, a multilayer semicircular bearing is manufactured by pressing and elongating the semicircular blank at its center to form a positioning convex portion with a bottom.

[Effect]

By adopting the above-mentioned means, the present invention forms a V-groove that completely connects the multilayer material to the final molding position without separation, and also allows the positioning convex portion to be formed without causing burrs or peeling of the sliding material. It is something that can be formed.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Reference numeral 15 indicates a multi-layer semicircular bearing of the present invention, in which a part of the bearing 15 is extruded outward at the center of the curved surface to prevent peeling of the sliding material and the occurrence of burrs, and to increase rigidity. A positioning protrusion 16 with an improved bottom is formed. Next, the method for manufacturing the multilayer semicircular bearing 15 will be explained in detail in the order of steps.

That is, in the multilayer semicircular bearing 15 of the present invention, a mold 19 supported by a die holder 17 and a punch holder 18 is disposed in a press machine, and a multilayer material 20 is fed into the mold 19 from one end to a predetermined feed length. By feeding the die plate 22, which has V-shaped cutting edges 21, 21 on the upper and lower surfaces of the die 19, and which are disposed on the die holder 17 and the punch disposed on the punch holder 18, respectively, Upper and lower V-groove engraving molds 24 and 25 supported by the plate 23 form V-grooves 26 that face each other along the width direction on the front and back surfaces thereof to form a blank material 27 having a predetermined width (third (see Figures and Figure 4).

As shown in FIG. 5, the cutting blades 21 of the upper and lower V-groove carving dies 24, 25 have a recess 28 in the center whose height is gradually reduced from both ends. By providing the V-groove 26 in the layer material 20, the multi-layer material 20 has a large drum-shaped center compared to both ends, as shown in FIG. 6, and is completely connected during feeding to each process. A thick portion 29 is provided which provides the following.

Here, the depth of the V-groove 26 formed in the multilayer material 20 is such that both ends can be easily cut when bending into a semicircle, and the center part is connected until the final molding. Therefore, when the thickness of the multilayer material 20 is t, the thickness t' of both ends left between the V grooves 26 after forming the V grooves 26 and the thickness of the center part (thick wall part 29) are t″ is t′=0.1~
It is preferable that 0.2t, t″=0.3 to 0.4 (see FIGS. 7 and 8).

In addition, the cutting depth of the V-groove 26 provided on the sliding material X side is preferably such that it always reaches beyond the sliding material and reaches the steel plate in order to prevent peeling during cutting.

Furthermore, the distance l of the thick part 29 provided in the center
When the width of the multilayer material 20 is L, l = 0.08 ~
A value of 0.3L is preferable for bending into a semicircle (see Figure 6).

Next, a blank material 27 with a V groove 26 carved therein is prepared.
A rough bending punch 31 having a concave curved surface 30 on the lower surface supported by a punch plate 23 and a die plate 2
A rough bending die 33 having a convex curved surface 32 on the upper surface supported by
3, cut both ends of the V-groove 26 so as to leave the thick part 29 and bend it into a substantially semicircular shape to form a substantially semicircular blank material 271 (see FIG. 9).

Next, a substantially semicircular blank material 271 is bent into an intermediate bending punch 35 having a semicircular concave portion 34 on the lower surface supported by the punch plate 23 and an intermediate bending punch 35 having a semicircular convex portion 36 on the upper surface supported by the die plate 22. feeding between the die 37 and end bending blocks 38, 38 arranged to sandwich the intermediate bending die 37;
The intermediate bending die, punches 35 and 37, and end bending block 38 partially bend the end portion into a semicircular shape to form a semicircular blank material 27.
2 (see Figure 10).

After that, a semicircular recess 39 is formed on the lower surface of the semicircular blank 272 supported by the punch plate 23.
A finishing die 44 having a semicircular convex portion 42 on the upper surface supported by the die plate 22 and a step portion 43, 43 that is continuous with the convex portion 42 and finishes the edge portion is used. A semicircular blank material 27 is made into a complete semicircle by the finishing punch and dies 40 and 44, and finish bent so as to coin the end edge into a predetermined shape.
3 (see Figure 11).

Next, the semicircular blank material 273 is supported by the punch holder 23 and is supported by the die holder 22 via the elastic body 48 and a cutting punch 47 having a semicircular recess formed in its lower surface and having a bearing pin 46 in the center. A cutting die 53 having a semicircular convex portion 49 and a stepped portion 50 continuous to the convex portion 49 and supporting the edge portion is formed on the upper surface thereof, and has a pressing pin 52 in the center.
The blank material 273 is cut from the multilayer material 20 by the cutting punch and the dies 47 and 53.
3 is pressed by the cutting punch 47 to compress the elastic body 48 and sink, thereby cutting and separating the thick portion 29.

Next, at the same time as the separation, one end is pressed against the center of the blank material 273 with a bearing pin 46, and the pressing pin 52
As the cutting die 53 sinks, it protrudes and presses the bearing pin 46 side so as to retract the bearing pin 46, thereby pressing and elongating the part.
Unlike the drawing process that is commonly done in which a cylindrical wall is formed by drawing in the surrounding material and drawing it in, the cylindrical wall is formed using only the thickness of the extruded part without causing the surrounding material to flow. The cutting die 53 is used to restore the elastic body 48 by separating the punch 47 by causing the flow to form a bottomed positioning convex portion 16 to form the multilayer semicircular bearing 15 (see FIG. 12). The pressure pin 52 is pulled out from the convex portion 16 by force, and the multilayer semicircular bearing 15 is returned to its original position so that it can be moved next time.

Further, the upper end of the bearing pin 46 is brought into contact with an elastic body 54 disposed on the punch holder 18, and the elastic body 54 applies a constant load to the bearing pressure pin 46 when forming the positioning convex portion 16. It is configured such that the convex portion 16 can be extended satisfactorily.

Multi-layer semicircular bearing 15 formed in this way
is sequentially extruded into the discharge hole 55 by the blank material 273 sent to the cutting punch and die 47, 53 from the previous process, and falls out of the mold 19 from the discharge hole 55, or is compressed from the air hole 56 provided in the mold 19. It is discharged by blowing air.

In Fig. 3, 57 is a stamping die, 58, 59
indicates a blank guide.

〔Effect of the invention〕

The present invention provides a multi-layer material with a V-groove that forms a thick part in the center, so that the multi-layer material can be reliably fed within the mold without being separated at the V-groove portion, and the material can be completely fed. Since positioning is possible, molding defects and damage to the mold can be prevented.

In addition, since the positioning convex part is formed by pressing and elongating processing using a pressing pin and a bearing pin without causing the material on the sliding surface to flow, the sliding material is This prevents peeling off and the occurrence of burrs, and since the convex portion bottoms out, the strength (rigidity) of the convex portion is improved, and the bearing can be firmly positioned.

Furthermore, the molding work is automated, making it possible to produce high-quality bearings in large quantities and preventing damage to sliding materials. It has great effects on economy and productivity.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a multi-layer semicircular bearing of the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1,
FIG. 3 is a cross-sectional view of a mold used in the method for manufacturing a multilayer semicircular bearing of the present invention, and FIG. 4 is a cross-sectional view of the mold B in FIG.
- Cross-sectional view taken along line B, Figure 5 is an explanatory diagram of the cutting edge shape of the V-groove engraving die, and Figure 6 is a cross-section of the multilayer material showing the state in which V grooves are formed with the upper and lower V-groove engraving die. Figure 7 is a sectional view taken along line CC in Figure 6, Figure 8 is
The sectional view taken along the line D-D in Fig. 6, and Fig. 9 are
10 is a sectional view taken along line FF in FIG. 3, FIG. 11 is a sectional view taken along line GG in FIG. 3, and FIG. 12 is a sectional view taken along line GG in FIG. 3. 13 is a plan view showing the forming state of the multilayer material in each step in the present invention, and FIGS. 14 to 21 are explanations of the conventional manufacturing method of multilayer semicircular bearings. 22 are perspective views showing a conventional multilayer semicircular bearing. 15: Multilayer semicircular bearing, 16: Positioning convex portion, 1
9: Mold, 20: Multilayer material, 21: Cutting blade, 24:
Upper V groove engraving type, 25: Lower V groove engraving type, 26: V
Groove, 27, 271, 272, 273: Blank material, 29: Thick wall part, 30: Concave curved surface, 31: Rough bending punch, 32: Convex curved surface, 33: Rough bending die, 3
4: Semicircular concave portion, 35: Intermediate bending punch, 36: Semicircular convex portion, 37: Intermediate bending die, 39: Semicircular concave portion, 40: Finishing punch, 42: Semicircular convex portion, 4
4: Finishing die, 46: Bearing pin, 47: Cutting punch, 52: Pressing pin, 53: Cutting die.

Claims (1)

[Claims] 1. A multilayer material formed by integrally covering a sliding material on a steel plate is fed stepwise into a mold installed in a press, and the material is applied to the front and back surfaces of the multilayer material. Form V-grooves that face each other along the width direction, then partially cut the V-grooves so as to leave the connecting portions and bend them into a substantially semicircular shape, and then finish bend them into a semicircular shape while leaving the connecting portions. In this method, a multi-layer semicircular bearing is obtained by forming a protrusion for positioning in the center and completely cutting the connection part. A groove-carving type, which faces each other along the width direction on the front and back surfaces of the multilayer material, and the depth of the cut gradually decreases at the center of the width of the material compared to both ends, so that the cross section is shaped like a large drum. (b) forming a V-groove by forming a V-groove to form a flesh portion; (c) forming a substantially semicircular blank material by cutting the material so as to leave a thick portion thereof, and bending both ends in the width direction into a substantially semicircular shape; (c) the substantially semicircular blank material; The end of the material is partially bent into a semicircular shape using an intermediate bending punch having a semicircular concave portion and an intermediate bending die having a semicircular convex portion. Then, using a finishing punch with a semicircular concave portion and a finishing die with a semicircular convex portion, finish bending is performed to make it into a perfect semicircle and coin the end edge to create a semicircular shape. (d) Cutting the thick part of the V-groove of the semicircular blank material using a cutting punch and die to completely separate it from the multilayer material, and also cutting the thick part of the semicircular blank material into the cutting punch and die. Forming a semicircular bearing by pressing and elongating the central part of the semicircular blank material to form a positioning convex portion with a bottom using a pressing pin and a bearing pin; A method for manufacturing a multilayer semicircular bearing characterized by comprising the step (d).