JPH04300027A - Manufacture of half bearing - Google Patents

Abstract

PURPOSE:To offer the manufacture for a half bearing which does not necessitate a cutting process. CONSTITUTION:This invention is a manufacture for a half bearing 1 which is formed like a semicylinder, and has relief parts 1d, 1e in both end parts in the peripheral direction on the inside peripheral surface of the bearing, and in this manufacture for the half bearing, a punch 9 having recessed parts 9a, 16a and 4a partitioned by the eccentric circular arc surface on which both end parts in the peripheral direction corresponding to the relief parts 1d, 1e become gradually shallower toward both ends in the peripheral direction, and a die 16 or a core roll 4 are used, and a forming finish is executed to the half bearing by a press equipment 7 or roll equipments 2, 13. The half bearing having the relief part can be formed by only the press equipment or the roll equipment without necessitating the cutting process, and the half bearing can be formed by an extremely simple process.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a half bearing.

0002

[Prior art and its problems] Conventional half-bearings with relief portions are manufactured by first forming a strip-shaped material into a semi-cylindrical shape using a press or roll device, and then forming the half-bearing material into a semi-cylindrical shape using a press or roll device. The inner diameter dimension and relief part are finished by cutting. That is, finishing is generally performed by the method shown in FIGS. 12 and 13. The half bearing material 50 is fitted and attached to the semi-cylindrical surface 52a of the block 52 with both ends thereof supported by the clamp plates 51. 53 is a knockout rod.

[0003] For this half bearing material 50, first and second
Cutting is performed using boring bits 54 and 55. 1st, 2nd
The boring bar 56 to which the boring bits 54 and 55 are attached is tilted slightly, and the first boring bit 54 is positioned slightly lower than the second boring bit 55, and the cutting edge is lower than the second boring bit 55. is made to protrude slightly. Then, the boring bar 56 is rotated and fed, and the crush relief 50b surface is machined by the first boring tool 54.
At the same time, the second boring tool 55 cuts the intermediate surface 50a of the inner peripheral surface of the bearing.

However, in the case of such a conventional half bearing 50, finishing of the inner circumferential surface including the crush relief 50b is a cutting process using a tool separate from the press device or roll device. Therefore, there is a technical problem that the manufacturing process is complicated.

[0005]

[Means for Solving the Problems] The present invention has been made in view of the above-mentioned conventional technical problems, and has a semi-cylindrical structure, and has a structure in which a bearing is provided at both ends in the circumferential direction of the inner circumferential surface of the bearing. A method for manufacturing a half-split bearing having a relief portion, the punch, die or core roll having a recessed portion in which both ends in the circumferential direction corresponding to the relief portion are partitioned by an eccentric circular arc surface that becomes gradually shallower toward both ends in the circumferential direction. This is a method for manufacturing half bearings in which the half bearings are formed and finished using a press machine or a roll machine. The configuration of the invention described in claim 2 uses a band-shaped material, cuts the band-shaped material into a predetermined length, and continuously forms and finishes it with a roll device to form a semi-cylindrical shape, and the material is formed inside the bearing. A method for manufacturing a half bearing having relief parts at both ends in the circumferential direction of the circumferential surface, the core roll of the roll device forming a recess in which approximately half of the circumference is partitioned by a small outer diameter. However, both ends of the recess in the circumferential direction are partitioned by eccentric circular arc surfaces that become shallower toward both ends in the circumferential direction according to the depth of the relief part, and the remaining half of the circumference is partitioned by a large outer diameter. This is a method of manufacturing a split bearing. The configuration of the invention described in claim 3 is such that a half-split bearing material having a semi-cylindrical shape is formed and finished using a roll device to form a semi-cylindrical shape, and reliefs are provided at both ends in the circumferential direction of the inner circumferential surface of the bearing. A method for manufacturing a half bearing in which a die of a roll device is adapted to the inner diameter of the half bearing, and both ends in the circumferential direction are formed with a half bearing formed in the circumferential direction according to the depth of the relief part. This is a method of manufacturing a half-split bearing having a recess partitioned by an eccentric arc surface that becomes shallower toward both ends in the direction. The structure of the invention described in claim 4 is that a blank is formed from a band-shaped material, and the blank is formed and finished using a press machine to form a semi-cylindrical shape, and reliefs are provided at both ends in the circumferential direction of the inner circumferential surface of the bearing. A method for manufacturing a half bearing having a half bearing, the die of the press device having an arcuate surface matching the outer diameter of the half bearing, and the punch having a shape matching the inner diameter of the half bearing. , a method for manufacturing a half-split bearing having a recessed portion at both ends in the circumferential direction that is partitioned by an eccentric circular arc surface that becomes gradually shallower toward both ends in the circumferential direction depending on the depth of the relief portion. The configuration of the invention described in claim 5 is that a blank is formed from a band-shaped material, and the blank is shaped and finished using a press device to form a semi-cylindrical shape,
A method for manufacturing a half bearing having relief portions at both ends in the circumferential direction of the inner circumferential surface of the bearing, the punch of the press device having an arcuate surface matching the inner diameter of the half bearing, and a die. However, manufacturing a half bearing having a concave portion that matches the outer diameter of the half bearing and that has a concave portion at both ends in the circumferential direction that is partitioned by an eccentric circular arc surface that gradually becomes shallower toward both ends in the circumferential direction depending on the depth of the relief portion. It's a method. Furthermore, the configuration of the invention described in claim 6 is as follows:
A half-split bearing is a half-split bearing in which a half-split bearing material with a semi-cylindrical shape is formed and finished using a press machine to form a semi-cylindrical shape and have relief parts at both ends in the circumferential direction of the inner circumferential surface of the bearing. In the manufacturing method, the die of the press device has an arcuate surface that matches the outer diameter of the half bearing, the punch matches the inner diameter of the half bearing, and both circumferential ends have a depth of the relief part. This is a method for manufacturing a half bearing having a recess partitioned by an eccentric arc surface that becomes gradually shallower toward both ends in the circumferential direction depending on the width of the bearing. Furthermore, the configuration of the invention described in claim 7 is such that a half-split bearing material having a semi-cylindrical shape is formed and finished using a press machine, so that the semi-cylindrical shape is formed, and both ends in the circumferential direction of the inner circumferential surface of the bearing are formed. A method for manufacturing a half bearing having a relief portion at the bottom, the punch of the press device having an arcuate surface matching the inner diameter of the half bearing, and the die having a half bearing having a relief portion on the outside diameter of the half bearing. Compatible with
This is a method for manufacturing a half bearing having a recessed portion at both ends in the circumferential direction that is partitioned by an eccentric arc surface that becomes gradually shallower toward both ends in the circumferential direction depending on the depth of the relief portion.

[0006]

[Function] According to this method of manufacturing half bearings,
A half bearing having a semi-cylindrical shape and having relief portions at both ends in the circumferential direction of the inner peripheral surface of the bearing is manufactured using a press device or a roll device. The punch, die, or core roll of this press device or roll device has a recessed portion at both ends in the circumferential direction corresponding to the relief portion that is partitioned by an eccentric circular arc surface that becomes gradually shallower toward both ends in the circumferential direction. Alternatively, if the half bearing is formed and finished using a roll device, it is formed into a semi-cylindrical shape and at the same time, relief portions are formed and finished at both ends in the circumferential direction.

According to the second aspect of the invention, the strip material is continuously formed and finished using a roll device. That is, the core roll of the roll device forms a recess in which approximately half of the circumference is partitioned by a small outer diameter, and both ends of the recess in the circumferential direction become gradually shallower toward both ends in the circumferential direction depending on the depth of the relief part. Since the remaining half of the circumference is partitioned by a large outer diameter, the material cut from the strip material is transferred from the cutting side to the recess of the core roll by one moving roll. By pressing, it is formed into a semi-cylindrical shape and, at the same time, relief portions are formed and finished at both ends in the circumferential direction. According to the third aspect of the invention, the half bearing material having a semi-cylindrical shape is formed into a half bearing having a relief portion by a die in which a recess is formed and a roll device having a pair of moving rolls. It is molded and finished.

According to the fourth and fifth aspects of the present invention, a blank is formed from a strip-shaped material, and the blank is subjected to forming and finishing using a press device. This press device has an arcuate surface between the die and the punch that matches the outer diameter of the half bearing, and also matches the inner diameter of the half bearing, and both ends in the circumferential direction are shaped according to the depth of the relief part. Since the blank is formed into a semi-cylindrical shape, the blank is formed into a semi-cylindrical shape and at the same time, relief portions are formed and finished at both ends in the circumferential direction, since the blank is formed into a semi-cylindrical shape since it has a concave portion partitioned by an eccentric arc surface which becomes shallower toward both ends in the circumferential direction. According to the invention described in claims 6 and 7, the half-bearing material having a semi-cylindrical shape is molded into a half-bearing having a relief portion by a press machine.

[0009]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a half bearing 1 manufactured according to the present invention will be explained with reference to FIGS. 9 to 11. The half-split bearing 1 has a semi-cylindrical shape having an inner radius (a) and an outer radius (b) centered on the center O1, and is made by layering a bearing alloy 1b on the inner surface of a back metal 1a usually made of mild steel. The surface of the bearing alloy 1b forms the bearing inner peripheral surface 1f. This half bearing 1 has an intermediate surface 1c in the circumferential direction having an inner radius (A) centered on the center O1, and a uniform maximum wall thickness A.

[0010] On both sides of the intermediate surface 1c in the circumferential direction, there are oil relief portions 1d, 1d partitioned by an eccentric radius (C) centered on the center O2, and furthermore, oil relief portions 1d, 1d are separated by an eccentric radius (C) centered on the center O2. Center O3 on both sides in the circumferential direction
It has crush relief parts 1e, 1e partitioned by a radius (d) that is further eccentric from the center. The outer ends in the circumferential direction of the oil relief parts 1d, 1d have a wall thickness B that is thinner than the maximum wall thickness A, and the crush relief parts 1e, 1e
The outer end in the circumferential direction has a wall thickness C that is thinner than the wall thickness B, and has a relief depth a formed by the difference between the inner radius (a) and the eccentric radius (d).

[0011] Such oil relief parts 1d, 1d and crush relief parts 1e, 1e are important as design parts for oil lubrication between the rotary shaft rotatably supported by the half bearing 1. When the half bearing 1 is assembled into a bearing device, it functions to provide lubrication during operation and prevent seizure.

Next, a method for manufacturing the half bearing 1 having such a structure will be explained. FIGS. 1 and 2 show the first example of this invention.
An example is shown. In the figure, reference numeral 2 indicates a roll device, which includes a core roll 4 and a moving roll 5. The core roll 4 has a concave portion 4a with a small outer diameter that occupies approximately half of the circumference, and this concave portion 4a has a circumferential direction partitioned by an inner radius (a) centered on the center O1 as shown in FIG. an intermediate surface 4b of
Connected to both sides in the circumferential direction of this intermediate surface 4b, and connected to eccentric circular arc surfaces 4c, 4c separated by an eccentric radius (C) centered on the center O2, and connected to both sides in the circumferential direction of these eccentric circular arc surfaces 4c, 4c. , a further eccentric radius centered on the center O3 (
It has eccentric circular arc surfaces 4d, 4d at both ends separated by d), and the remaining half of the circumference where the recess 4a is not formed has a large outer diameter corresponding to the outer circumference of the half bearing 1, and the center O1
It has an outer radius (b) centered at . Both ends of the recess 4a in the circumferential direction are partitioned by eccentric arcuate surfaces 4c and 4d that become shallower toward both ends in the circumferential direction.

When a strip material 3 having a predetermined thickness with the bearing alloy 1b fixed to one side of the back metal 1a is supplied to the core roll 4 with the bearing alloy 1b side facing inside, a predetermined circumferential direction of the half bearing 1 is supplied. The material 3' is cut according to the length by the cutter 6, and at the same time as the strip material 3 is cut by the cutter 6, the moving roll 5 cuts the outer surface of the material 3' while rotating around the center of the core roll 4. Rolling from the side in the direction of the arrow, material 3'
is continuously formed into a semi-cylindrical shape by the recess 4a. However, the length of the material 3' cut by the cutter 6 is set to be slightly shorter in consideration of the escape of the meat crushed by the moving roll 5. Along with this molding, oil relief parts 1d, 1d and crush relief parts 1e,
1e (generally referred to as a relief portion) is formed. Specifically, the oil relief parts 1d, 1d are formed by the eccentric arc surfaces 4c, 4c of the recess 4a, and the crush relief parts 1e, 1e are formed by the eccentric arc surfaces 4d, 4d of the recess 4a. In this way, the half-split bearing 1 is manufactured, which has a semi-cylindrical shape and has relief portions 1d and 1e formed at both circumferential ends of the bearing inner circumferential surface 1f.

3 to 5 show a second embodiment of the invention. In the figure, reference numeral 7 indicates a main part of the press device, which includes a die 8 and a punch 9. Since the die 8 and the punch 9 have a bilaterally symmetrical shape, one end is shown in FIG. The die 8 has a semicircular shape whose inner peripheral surface is partitioned by an outer radius (b) centered on the center O1, and this outer radius (b)
This forms an arcuate surface that matches the outer diameter of the half bearing 1. The punch 9 has an inner radius centered on the center O1 (a), an outer radius centered on the center O1 (b), an eccentric radius centered on the center O2 (c), and an even more eccentric radius centered on the center O3. Divided by radius (d), half bearing 1
The recess 9a has the same shape as the recess 4a of the first embodiment, forming an intermediate surface 9b and eccentric arcuate surfaces 9c and 9d.

As shown in FIG. 3, the bearing alloy 1b is fixed to one side of the back metal 1a, and a belt-shaped material 10 having a predetermined thickness is pressed into a shape according to the dimensions of the half bearing 1 using a press machine (not shown). A blank 11 is punched out, the blank 11 is inserted between the die 8 and the punch 9 with the bearing alloy 1b on the punch 9 side, and the punch 9 is lowered to form and finish the blank 11 between the die 8 and the die 8. . As a result of this finishing process, the blank 11 is formed into a semi-cylindrical shape, and at the same time, the oil relief parts 1d, 1d and the crush relief parts 1e, 1e are formed. Thus, it forms a semi-cylindrical shape, and relief portions 1d, 1 are provided at both ends in the circumferential direction of the bearing inner circumferential surface 1f.
The half bearing 1 having the shape e formed therein is manufactured.

Note that even if the die 8 is formed with a recess having the same shape as the recess 9a of the punch 9, and the punch 9 is formed with an arcuate surface that matches the inner diameter of the half bearing 1, the inner circumferential surface 1f of the bearing A half bearing 1 having relief portions 1d and 1e formed at both ends in the circumferential direction can be manufactured in the same manner. FIGS. 6 to 8 show the third embodiment of this invention.
An example is shown. In the figure, the reference numeral 12 indicates a half-bearing material which is a semi-finished product of the half-bearing 1, and the inner and outer circumferential surfaces are formed by a conventional forming method to form an inner radius (A) and an outer radius respectively centered on the center O1. It is formed into a semi-cylindrical shape with concentric circles having (b). By using this half bearing material 12 and molding it using the roll device 13, the half bearing 1 having the relief portions 1d and 1e is manufactured.

The roll device 13 includes a pair of moving rolls 14
, 15 and a die 16, and the die 16 has a recess 16 having the same shape as the core roll 4 of the first embodiment, as shown in FIG.
a is formed. That is, the recess 16a has an inner radius (a) centered on the center O1, an outer radius (b) centered on the center O1, and an outer radius (b) centered on the center O1, so as to fit the inner diameter of the half bearing 1.
Eccentric radius (c) centered on center O2 and center O
It is partitioned by a further eccentric radius (D) centered at 3, and has an intermediate surface 16b and eccentric arcuate surfaces 16c and 16d. Therefore, also in this embodiment, the half-bearing material 12 is placed so that the bearing alloy 1b is on the die 16 side, and the pair of moving rolls 14 and 15 are moved from the center of the half-bearing material 12, respectively. By rolling and moving in the direction of the arrow, a half bearing 1 having relief portions 1d and 1e is manufactured.

Note that by using this half bearing material 12 and molding and finishing it using a press device similar to that shown in FIGS. 4 and 5 as a second embodiment, relief parts 1d and 1e are formed. Of course, the half bearing 1 can be manufactured. In addition, in the half bearing 1 of each of the above embodiments, oil relief parts 1d and 1d are used as relief parts.
The method of the present invention can also be applied to a half bearing having only the crush relief portions 1e, 1e as relief portions.

[0019]

[Effect of the invention] As understood from the above explanation,
According to the method for manufacturing a half bearing according to the present invention, a half bearing having a relief portion can be formed using only a press device or a roll device without the need for a cutting process, and by an extremely simple process. This has the practical effect of being able to form half-split bearings.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a roll device according to a first embodiment of the present invention.

FIG. 2 is an enlarged view showing the main parts of the roll device according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a blank punching process according to a second embodiment of the present invention.

FIG. 4 is a diagram showing main parts of a press device according to a second embodiment of the present invention.

FIG. 5 is an enlarged view showing main parts of a die and a punch according to a second embodiment of the present invention.

FIG. 6 is a diagram showing a half-split bearing material according to a third embodiment of the present invention.

FIG. 7 is a diagram showing a roll device according to a third embodiment of the present invention.

FIG. 8 is an enlarged view showing main parts of a roll device according to a third embodiment of the present invention.

FIG. 9 is a perspective view showing a half bearing manufactured by the method of the present invention.

FIG. 10 is a sectional view showing a part of a half bearing manufactured by the method of the present invention.

FIG. 11 is a diagram showing the main parts of a half bearing manufactured by the method of the present invention.

FIG. 12 is a diagram showing a conventional half bearing processing method.

FIG. 13 is a diagram showing a conventional half bearing processing method.

[Explanation of symbols]

1: Half bearing, 1a: Back metal, 1b: Bearing alloy, 1c: Intermediate surface, 1d: Oil relief part (relief part), 1e:
Crust relief part (relief part), 1f: Bearing inner peripheral surface, 2: Roll device, 3, 10: Strip-shaped material, 4: Core roll, 4a: Recessed part, 4b: Intermediate surface, 4c, 4d: Eccentric circular arc surface, 5: Moving roll, 6: Cutter, 7: Press device, 8
:Die, 9: Punch, 9a: Recess, 9b: Intermediate surface, 9c
, 9d: Eccentric arc surface, 11: Blank, 12: Half bearing material, 13: Roll device, 14, 15: Moving roll, 1
6: die, 16a: recess, 16b: intermediate surface, 16c, 1
6d: Eccentric arc surface, (A): Inner radius, (B): Outer radius,
(c), (d): Eccentric radius.

Claims (7)

[Claims] 1. A method for manufacturing a half bearing having a semi-cylindrical shape and having relief portions at both ends in the circumferential direction of the inner circumferential surface of the bearing, wherein both ends in the circumferential direction corresponding to the relief portions are at both ends in the circumferential direction. A half-split bearing characterized in that the half-split bearing is formed and finished by a press device or a roll device using a punch, die, or core roll having a concave portion partitioned by an eccentric arc surface that gradually becomes shallower toward the end. manufacturing method. 2. Using a strip-shaped material, the strip-shaped material is cut into a predetermined length, and is continuously formed and finished using a roll device to form a semi-cylindrical shape, and the strip is cut into a predetermined length, and is formed into a semi-cylindrical shape at both ends in the circumferential direction of the inner circumferential surface of the bearing. A method for manufacturing a half bearing having a relief portion, wherein a core roll of a roll device forms a recess in which approximately half of the circumference is partitioned by a small outer diameter, and both ends of the recess in the circumferential direction is partitioned by an eccentric circular arc surface that gradually becomes shallower toward both ends in the circumferential direction according to the depth of the relief part, and the remaining half of the circumference is partitioned by a large outer diameter. Production method. 3. A half-split bearing material having a semi-cylindrical shape is formed and finished using a roll machine to form a semi-cylindrical half with relief parts formed at both ends in the circumferential direction of the inner circumferential surface of the bearing. A method for manufacturing a half bearing that is a split bearing, wherein a die of a roll device is adapted to the inner diameter of the half bearing, and both circumferential ends are gradually moved toward both ends in the circumferential direction according to the depth of the relief portion. A method for manufacturing a half-split bearing, comprising a recess partitioned by a shallower eccentric arc surface. 4. A half-split bearing in which a blank is formed from a band-shaped material, and the blank is formed and finished using a press machine to form a semi-cylindrical shape and has relief parts at both ends in the circumferential direction of the inner circumferential surface of the bearing. A method for manufacturing a half bearing, wherein the die of the press device has an arcuate surface that matches the outer diameter of the half bearing, the punch matches the inner diameter of the half bearing, and both ends in the circumferential direction have an arc surface that matches the outer diameter of the half bearing. A method for manufacturing a half-split bearing, comprising a recess partitioned by an eccentric arc surface that becomes gradually shallower toward both ends in the circumferential direction depending on the depth of the relief portion. 5. A half-split bearing in which a blank is formed from a band-shaped material, the blank is subjected to a forming process using a press machine, the blank is formed into a semi-cylindrical shape, and has relief parts at both ends in the circumferential direction of the inner circumferential surface of the bearing. A method for manufacturing a half bearing, wherein the punch of the press device has an arcuate surface that matches the inner diameter of the half bearing, the die matches the outer diameter of the half bearing, and both ends in the circumferential direction have a circular arc surface that matches the inner diameter of the half bearing. A method for manufacturing a half-split bearing, comprising a recess partitioned by an eccentric arc surface that becomes gradually shallower toward both ends in the circumferential direction depending on the depth of the relief portion. 6. A half bearing material formed into a semi-cylindrical shape that is formed and finished using a press machine to form a semi-cylindrical shape and having relief parts at both ends in the circumferential direction of the inner circumferential surface of the bearing. A method for manufacturing a half bearing, wherein the die of the press device has an arcuate surface that matches the outer diameter of the half bearing, the punch matches the inner diameter of the half bearing, and both ends in the circumferential direction have an arc surface that matches the outer diameter of the half bearing. A method for manufacturing a half-split bearing, comprising a recess partitioned by an eccentric arc surface that becomes gradually shallower toward both ends in the circumferential direction depending on the depth of the relief portion. 7. A half bearing material formed into a semi-cylindrical shape is formed and finished using a press machine, and the half-bearing is formed into a semi-cylindrical shape and has relief parts at both ends in the circumferential direction of the inner peripheral surface of the bearing. A method for manufacturing a half bearing, wherein the punch of the press device has an arcuate surface that matches the inner diameter of the half bearing, the die matches the outer diameter of the half bearing, and both ends in the circumferential direction have a circular arc surface that matches the inner diameter of the half bearing. A method for manufacturing a half-split bearing, comprising a recess partitioned by an eccentric arc surface that becomes gradually shallower toward both ends in the circumferential direction depending on the depth of the relief portion.