JP2002239663A - Disk member and its forming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To satisfy two contradictory problems of performance and cost better in comparison with a conventional product. SOLUTION: A disk member 2 for a tilt plate is provided with a flange part having the opening thickened in the periphery and with a thin disk body continuing to this flange part and extending outward in the radial direction. The disk member is formed through a drilling process of making the opening at a prescribed position in a planar base material 10, a burring process of pressurizing the periphery of the opening in the axial direction to form a tubular burring 12 protruding from one side of the planar base material, and a press process of compressing the burring 12 in the axial direction to increase the thickness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a disk member, and more particularly to a disk member suitable for use as a swash plate of a swash plate compressor and a method of forming the same.

[0002]

2. Description of the Related Art Conventionally, as a swash plate of a swash plate compressor, a disk member having a flange portion having a thicker peripheral portion of a through hole, a disk member fitted into the flange portion, and connecting the disk member to an axis of a rotary shaft. What consists of an attachment attached diagonally with respect to is known.

[0003]

When the above-mentioned disk member is used for a swash plate of a swash plate type compressor, a disk member generally manufactured by sintering or casting is used. That is, it can be easily mass-produced at a relatively low cost. However, the material of the disk member manufactured by sintering or casting has a drawback that strength (toughness) and dimensional accuracy are low. On the other hand, if attention is paid only to the strength and dimensional accuracy of the member, it is conceivable to cut out from a rod-shaped material by cutting, but since mass of material is low and productivity is low, it is almost impossible to mass-produce industrially. is there. In view of such circumstances, the present invention provides a disk member and a molding method thereof capable of simultaneously satisfying conflicting issues of performance and cost, such as strength and dimensional accuracy.

[0004]

According to the first aspect of the present invention, there is provided a flange portion having a thicker peripheral portion of an opening, and a thin disk main body portion connected to the flange portion and extending radially outward. The flange portion is formed by axially compressing a cylindrical burring formed on a plate-shaped material. According to a third aspect of the present invention, there is provided a disk member forming method comprising: a flange portion having a thicker peripheral portion of an opening; and a thin disk main body portion connected to the flange portion and extending radially outward. An opening step of forming an opening at a predetermined position of the plate material in the plate member; and a burring step of pressing a peripheral portion of the opening in an axial direction to form a cylindrical burring projecting from the plate material to one side. And a pressing step of compressing the burring in the axial direction to increase its thickness.

According to the disk member of the first aspect, the strength of the disk body is similar to that of the plate material, and the strength of the flange portion is higher than that of the plate material. The dimensional accuracy of the disk member is the same as that of the plate material, and the dimensional accuracy of the flange portion is higher than that of the plate material. As a result, the performance surface is higher than that of a conventional disk member formed by sintering or casting. According to the molding method of the third aspect, the disk member is formed by processing the same portion of the plate-shaped material consistently in the opening step, the burring step, and the pressing step. The cost can be further reduced as compared with a molded disk member. Therefore, conflicting issues of performance and cost can be satisfied at the same time.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A swash plate 1 according to the present invention will be described below with reference to FIG. The swash plate 1 has a substantially disk-shaped disk member 2 and an attachment 99 which is fitted into the disk member 2 integrally (see FIG. 16).
The rotation shaft (not shown) penetrates through a through hole 99 ′ formed in the attachment 99. The disk member 2 includes a thick flange portion 3 into which the attachment 99 is fitted,
And a thin disk main body 4 extending radially outward, and a hemispherical shoe (not shown) is in sliding contact with the disk main body 4.

In general, a disk member is manufactured by sintering or casting which can be easily mass-produced at a relatively low cost. However,
The material of the disk member manufactured by sintering or casting has a drawback that strength (toughness) and dimensional accuracy are low. On the other hand, if attention is paid only to the strength and dimensional accuracy of the member, a means of cutting out from a rod-shaped material by cutting is conceivable, but since mass of material is low and productivity is low, it is almost impossible to mass-produce industrially. is there. In other words, performance and cost are in conflict, and it is difficult to satisfy both.

Thus, the present embodiment provides a disk member 2 which satisfies cost and performance simultaneously and a method of molding the same. First, in the first embodiment, a case where one disk member 2 is formed from one sheet material 10 will be described. The plate material 10 has a solid disk shape as shown in FIG. 2, and has an outer diameter D ′ and a thickness T ′.
Is set substantially equal to the outer diameter D and the thickness T of the disk member 2 of the finished product shown in FIG. In addition, the plate material 1
As 0, a low-cost hot-rolled steel sheet having low anisotropy, such as S45C, is suitable.

First, in the opening step, the plate-shaped material 10 has a circular opening 1 which is concentrically aligned with the center position thereof.
In the opening step, means such as laser cutting or punching with a press can be selected, but punching with a press is preferable in terms of mass productivity.

When the opening step is completed, the process proceeds to the next burring step. In this burring step, although not shown, a die having a hole that is concentric with the opening 10 ′ of the plate material 10 to be set and has a larger diameter than the opening 10 ′ is taken in and out of the hole of the die. ,
This is performed by a rod-shaped punch that bends the peripheral portion of the opening 10 ′ toward the inside of the hole. After the burring process is completed, as shown in FIG.
Is bent to form a cylindrical burring 12 projecting to one side. And this burring 12
At this stage, the inner diameter C 'of the narrowest portion of the opening 12' has already been matched with the inner diameter C of the opening 3 'of the flange portion 3 (see FIG. 5). At this time, in the present embodiment, the die shoulder radius is reduced in order to reduce the radius R12 on the protruding side of the burring 12 as much as possible, while the punch shoulder radius is set as large as possible in order to reduce the reduction in the thickness of the burring 12. . In the burring step, it is possible to prevent the bent portion from cracking simply by applying lubricating oil to the die and the punch or directly applying the lubricating agent to the peripheral portion of the opening 10 '. Before the burring step, the periphery of the opening 10 'may be softened by annealing or the like.

When the burring step is completed, the process proceeds to the next press (forging) step. This press (forging) step is for compressing the burring 12 in the axial direction intensively by a plurality of dies (not shown). After the press (forging) step is completed, the inner diameter C ′ of the opening 12 ′ is reduced. While maintaining the wall thickness in the radially outward direction,
A thick portion 13 having a large thickness is formed in the radial direction while reducing the radius R12 'in 2'. In this press process,
Pressing may be performed in a state where the outer diameter D 'and the thickness T' of the disk main body 4 are restrained so as not to change, and the inner diameter C 'of the preliminary opening 12' is restrained so as not to change.

When the above-described pressing step is completed, the process proceeds to a stamping step. In this stamping step, the thick portion 13 is intensively pressed by a mold (not shown). After the stamping step is completed, a flange 3 having a gentle outer peripheral portion is formed as shown in FIG. On the other hand, an annular recess 14 is formed at the boundary between the flange 3 and the disk body 4.
Is formed. This stamping step can be performed simultaneously with the press (forging) step, and the stamping step is performed so that the outer diameter D and the wall thickness T of the disk main body 4 and the inner diameter C of the opening 13 'do not change. It may be carried out in a state where it is restrained. Thereafter, the disk member 2 is roughened on the outer peripheral side (sliding surface with the shoe) with respect to the concave portion 14 and finish processing such as chamfering of the outer periphery of the disk or thermal spraying is performed.
Finished to the final product after coating.

As will be understood from the above description, the strength and dimensional accuracy of the disk body 4 are determined by the plate material 1.
0, and the strength and dimensional accuracy of the flange portion 3 are higher than those of the plate material 10, so that the performance of the disk member 2 is higher than that of a conventional disk member formed by sintering or casting. Also, since the disk member 2 is formed by processing the same portion of the plate-shaped material consistently through the opening step, the burring step, and the pressing step,
The cost can be further reduced as compared with a conventional disk member formed by sintering or casting. Therefore, according to the disk member 2 of the present invention and the molding method thereof, it is possible to simultaneously satisfy the conflicting problems of performance and cost.

FIGS. 6 to 10 show a second embodiment of the present invention. In the first embodiment, the disk member 2 is formed intermittently from a single disk-shaped plate material 10. In the present embodiment, the case where the disk member 2 is formed sequentially from the plate-like material 110 that is continuous in a band shape will be described. First, as in the first embodiment, an opening process is performed on the strip-shaped plate material 110. In this opening step, an opening interval L larger than the outer diameter D of the disk member 2 is set so that the forming positions of the preceding and following disk members 2 do not overlap with each other, and a strip-shaped plate-shaped member moving in the direction of the arrow is set. Openings 10 'are sequentially formed in the material 110 at positions corresponding to the opening intervals L (see FIG. 6). In the burring step of FIG. 7 subsequent to the above-described opening step, the burring step similar to that of the first embodiment is performed on the opening 10 ′ of the band-shaped plate-shaped material 110 moving in the direction of the arrow to form the burring 12 sequentially. . In the pressing step of FIG. 8 subsequent to the burring step, the burring 12 of the band-shaped plate material 110 moving in the direction of the arrow is subjected to the same pressing step as in the first embodiment to sequentially form the thick-walled portions 13. I do. In the stamping process of FIG. 9 following the pressing process,
The flange portion 3 is sequentially formed by performing the same pressing process as in the first embodiment on the thick portion 13 of the band-shaped plate material 110 moving in the direction of the arrow. As described above, the process flow from the opening process to the stamping process is the same as that of the first embodiment. However, in the present embodiment, the separating process shown in FIG. 10 which is not included in the first embodiment is performed after the stamping process. In this separation step, the disk body 4 having a diameter D is concentrically placed on the outer side of the center of the flange 3 of the band-shaped plate-like material 110 moving in the direction of the arrow. Separate from 110 sequentially. In this separation step, means such as cutting by laser or punching by press can be selected, but punching by press is preferable from the viewpoint of mass productivity. As described above, the disk member 2 having the same effect as that of the first embodiment can be formed from the strip material 110.

Next, FIGS. 11 to 15 show a third embodiment of the present invention. In the second embodiment, the case where the disk member 2 is formed from the band-shaped plate material 110 has been described. In this embodiment, for example, a rectangular plate material 2
A case in which a plurality of disc members 2 are formed from 10 will be described. First, an opening step is first performed as in the first embodiment. In this opening step, in order to prevent the molding positions of the disk members 2 adjacent to each other in the front, rear, left and right (only the front and rear are shown) from overlapping, the plate material 210 is formed based on an interval L larger than the outer diameter D of the disk members 2. A plurality of openings 10 'are formed simultaneously at corresponding positions in front, rear, left and right.
reference). When the above-described opening step is completed, a plurality of burring steps 12 are formed simultaneously by performing the same burring step as in the first embodiment on a plurality of openings 10 ′ at the front, rear, left and right as shown in FIG. As shown in FIG. 13, a plurality of thick portions 13 are formed by performing the same pressing process as in the first embodiment on a plurality of front and rear, left and right burrings 12, and furthermore, as shown in FIG. The same stamping process as in the first embodiment is performed on the meat portion 13 to form a plurality of flange portions 3 and concave portions 14. And
After the stamping step, a separating step is performed in the same manner as in the second embodiment. As shown in FIG. 15, a disk body having a center at each of the front, rear, left and right flange portions 3 and a concentric outer side with a diameter D is shown. This is cut off simultaneously from the rectangular plate-shaped material 210 except for the portion 4. In this separation step, means such as cutting by laser or punching by press can be selected, but punching by press is preferable from the viewpoint of mass productivity. As described above, the rectangular plate-shaped material 2
From 10 it is possible to simultaneously mold the disk members 2 having the same effects as in the first embodiment.

[0016]

As described above, according to the present invention, it is possible to obtain the effect that the conflicting problems of performance and cost can be simultaneously satisfied.

[Brief description of the drawings]

FIG. 1 is a sectional view of a swash plate 1 showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an opening 10 ′ and a plate material 10 after an opening step.

FIG. 3 is a sectional view showing the burring 12 and the plate material 10 after a burring step.

FIG. 4 is a sectional view showing the thick portion 13 and the plate material 10 after a pressing step.

FIG. 5 is a sectional view showing the flange portion 3 and the disk member 2 after a stamping process.

FIG. 6 is a sectional view showing a plurality of openings 10 ′ and a plate material 110 after an opening step according to a second embodiment of the present invention.

FIG. 7 is a sectional view showing the burring 12 and the plate material 110 after a burring step.

FIG. 8 is a cross-sectional view showing the thick part 13 and the plate material 110 after a pressing step.

FIG. 9 is a sectional view showing the flange portion 3 and the disk member 2 after a stamping process.

FIG. 10 is a sectional view showing a plurality of disk members 2 after a separating step.

FIG. 11 is a sectional view showing a plurality of openings 10 ′ and a plate-like material 210 after an opening step according to a third embodiment of the present invention.

FIG. 12 is a sectional view showing a plurality of burrings 12 and a plate material 210 after a burring step.

FIG. 13 is a cross-sectional view showing a plurality of thick portions 13 and a plate material 210 after a pressing step.

FIG. 14 is a sectional view showing a plurality of flange portions 3 and a disk member 2 after a stamping process.

FIG. 15 is a sectional view showing a plurality of disk members 2 after a separating step.

16 is an axial sectional view of the attachment 99. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Swash plate 2 ... Disc member 3 ... Flange part 4 ... Disc member main body 5 ... Burring 10, 110, 210 ... Plate material

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F04B 27/08 F04B 27/08 L

Claims (4)

[Claims] 1. A disk member comprising: a flange portion having a thicker peripheral portion of an opening; and a thin disk body portion connected to the flange portion and extending radially outward, wherein the flange portion is a plate. A swash plate formed by axially compressing a cylindrical burring formed in a shape material. 2. A method for molding a disk member, comprising: a flange portion having a thicker peripheral portion of an opening; and a thin disk main body portion extending in the radial direction and connected to the flange portion. An opening step of forming an opening at a predetermined position of the plate material, and a burring step of pressing a peripheral portion of the opening in the axial direction to form a cylindrical burring projecting from the plate material to one side, A method for forming a disk member, comprising: pressing a burring in the axial direction to increase its thickness. 3. The method according to claim 2, wherein the plate-shaped material has the same thickness as the disk main body. 4. A plurality of flange portions and a disk body portion are formed on the plate-shaped material, and each flange portion and the disk body portion are separated from the plate-shaped material by a separating step after the pressing step. The method for forming a disk member according to claim 2 or 3, wherein the method is a disk member.