JP2017003076A - Washer and manufacturing method of the same - Google Patents

Abstract

A washer capable of improving material yield is provided.
A thrust washer 1 is formed in an arc shape by joining a plurality of component members 10 to each other, and the component member 10 includes a first bottom surface 11 (inner peripheral surface) or a second bottom surface 12 (outer peripheral surface). ) At least one of them was linear.
[Selection] Figure 1

Description

  The present invention relates to a technique for a washer formed in an arc shape.

  Conventionally, the technique of the washer formed in circular arc shape is well-known. For example, as described in Patent Document 1.

  Patent Document 1 discloses a technique in which two arcuate (semicircular) washers (washer members) are combined and assembled to a cylinder block. Such an arc washer can be manufactured by punching a plate-shaped material with a predetermined die (pressing it).

  FIG. 13 shows a state where a plurality of arc-shaped washers (thrust washers 901) are manufactured by punching a single plate-shaped material N with a mold. As shown in FIG. 13, a plurality of thrust washers 901 can be manufactured by punching the material N many times while moving the material N in a certain direction with respect to the mold. However, as shown in FIG. 13, since there is a gap between adjacent thrust washers 901, the material in the portion (gap) is wasted, and there is room for improvement in terms of poor material yield.

JP 2010-23193 A

  The present invention has been made in view of the situation as described above, and a problem to be solved is to provide a washer capable of improving the material yield and a method of manufacturing the washer.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in the first aspect of the present invention, the washer is formed in an arc shape by joining a plurality of constituent members to each other, and at least one of the inner peripheral surface and the outer peripheral surface of the constituent member is linear. Is formed.

  According to a second aspect of the present invention, the component member is formed so that both the inner peripheral surface and the outer peripheral surface are linear.

  According to a third aspect of the present invention, the component member is formed such that the inner peripheral surface and the outer peripheral surface are parallel to each other.

  According to a fourth aspect of the present invention, the component member is formed such that an end surface connecting the inner peripheral surface and the outer peripheral surface is linear.

  According to a fifth aspect of the present invention, the component member is formed in a trapezoidal shape having the inner peripheral surface as an upper base and the outer peripheral surface as a lower base.

  In Claim 6, the said structural member is formed in an isosceles trapezoid shape.

  According to a seventh aspect of the present invention, the component member is chamfered at both end portions of the outer peripheral surface.

  According to an eighth aspect of the present invention, five of the constituent members are joined to form a semicircular shape.

  In Claim 9, the preparation process which prepares a plate-shaped raw material, the structural member formation process which obtains the several structural member formed in the trapezoid shape from the said raw material, The said several obtained by the said structural member formation process And a joining step of forming arc-shaped washers by joining the constituent members to each other.

  As effects of the present invention, the following effects can be obtained.

  In the first aspect, the material yield can be improved.

  According to the second aspect, the material yield can be effectively improved.

  According to the third aspect, the material yield can be effectively improved.

  In Claim 4, it can make it easy to join structural members.

  According to the fifth aspect, the material yield can be effectively improved.

  In the sixth aspect, the material yield can be effectively improved.

  According to the seventh aspect, it is possible to easily secure the sliding area.

  In the eighth aspect, the washer can be easily formed.

  In the ninth aspect, the material yield can be improved.

The front view which showed the structure of the thrust washer which concerns on 1st embodiment. The front view which showed the shape of the structural member. The figure which showed the manufacturing method of the thrust washer. (A) The front view which showed the raw material prepared at the preparation process. (B) The front view which showed the structural member obtained by a structural member formation process. (A) The front view which showed a mode that two structural members were joined. (B) The front view which showed a mode that another structural member was joined. (A) The front view which showed an example of the method of processing a raw material and obtaining a structural member. (B) The front view which showed the other example similarly. The front view which showed the thrust washer which concerns on 2nd embodiment. The front view which showed the thrust washer which concerns on 3rd embodiment. The front view which showed the thrust washer which concerns on 4th embodiment. The front view which showed the shape of the structural member which concerns on 4th embodiment. The front view which showed the thrust washer which concerns on 5th embodiment. The front view which showed the shape of the structural member which concerns on 5th embodiment. The schematic diagram which showed a mode that the thrust washer was obtained from the raw material by the conventional method.

  In the following description, the directions indicated by the arrow U, arrow D, arrow L, and arrow R in the figure are defined as an upward direction, a downward direction, a left direction, and a right direction, respectively. Further, the description will be made by defining the direction perpendicular to the drawing sheet as the front-rear direction.

  Below, the thrust washer 1 which concerns on 1st embodiment is demonstrated using FIG.1 and FIG.2.

  The thrust washer 1 is provided on a shaft member (for example, an engine crankshaft or the like) and receives a load in the thrust direction applied to the shaft member. The thrust washer 1 is formed by combining members obtained from a plate-like material N described later. Thereby, the thrust washer 1 is formed in a plate shape having a substantially constant thickness in the front-rear direction. Below, the shape of the thrust washer 1 viewed from the front will be described. The thrust washer 1 mainly includes five constituent members 10.

  Note that the five constituent members 10 according to this embodiment are all formed to have the same shape. Therefore, only the shape of one component member 10 will be described in detail below.

  2 is a plate-like member having a substantially constant thickness in the front-rear direction. The component member 10 mainly includes a first bottom surface 11, a second bottom surface 12, a first end surface 13, and a second end surface 14.

  The first bottom surface 11 is a surface formed in a straight line when viewed from the front. The 1st bottom face 11 is formed comparatively long (it is long compared with the 1st end surface 13 and the 2nd end surface 14 which are mentioned later).

  The second bottom surface 12 is a surface formed in a straight line when viewed from the front. The second bottom surface 12 is formed in parallel with the first bottom surface 11. The distance between both ends of the second bottom surface 12 is formed to be longer than the distance between both ends of the first bottom surface 11. That is, the second bottom surface 12 is formed longer than the first bottom surface 11.

  The first end surface 13 is a surface that connects one end portion of the first bottom surface 11 and one end portion of the second bottom surface 12. The first end surface 13 is formed in a straight line when viewed from the front.

  The second end surface 14 is a surface that connects the other end of the first bottom surface 11 and the other end of the second bottom surface 12. The second end surface 14 is formed in a straight line when viewed from the front. The second end surface 14 is formed to have the same length as the first end surface 13.

  In this way, the structural member 10 is formed in an isosceles trapezoidal shape (a trapezoid in which the inner angles at both ends of the bottom are equal) with the first bottom surface 11 as an upper base and the second bottom surface 12 as a lower base in a front view. That is, the component member 10 is formed so as to be line symmetric with respect to a straight line passing through the midpoint of the first bottom surface 11 and the midpoint of the second bottom surface 12. Specifically, the angle formed by the first bottom surface 11 and the first end surface 13 and the angle formed by the first bottom surface 11 and the second end surface 14 are formed to be 108 degrees. The angle formed between the second bottom surface 12 and the first end surface 13 and the angle formed between the second bottom surface 12 and the second end surface 14 are 72 degrees.

  Hereinafter, for convenience of explanation, the intersection between the second bottom surface 12 and the first end surface 13 and the intersection between the second bottom surface 12 and the second end surface 14 are referred to as apexes V. The distance between the first bottom surface 11 and the second bottom surface 12 (the width in the short direction of the component member 10) is referred to as a width W.

  As shown in FIG. 1, the thrust washer 1 is formed by combining five constituent members 10 configured as described above. Specifically, the first end face 13 of one constituent member 10 and the second end face 14 of the other constituent member 10 are joined to each other. At this time, the five constituent members 10 are arranged such that the first bottom surfaces 11 all face the same side (the point O side in FIG. 1). Moreover, it joins so that the vertexes V of the adjacent structural member 10 may correspond. As a result, the five constituent members 10 are arranged in a line along the arc.

  Each component 10 is arranged in an arcuate region formed between a circumference C1 having a radius r1 and a circumference C2 having a radius r2 with the point O as the center. Here, the circumference C <b> 1 is a circle (a circumscribed circle) that passes through all the vertices V of the constituent members 10. Further, the circumference C2 is a circle (inscribed circle) in contact with the first bottom surface 11 of all the constituent members 10. By appropriately setting the dimensions of the constituent member 10 so that the radius r1 and the radius r2 have desired values, the thrust washer 1 having a desired dimension according to the intended use can be obtained.

  Further, by setting the dimensions of each part of the constituent member 10 (the angle of each vertex, etc.) as in the present embodiment, the thrust washer 1 has a semicircular shape centered on the point O (an arc shape with a central angle of 180 degrees). ).

  Below, the manufacturing method of the thrust washer 1 comprised as mentioned above is demonstrated using FIGS. 3-5.

  As shown in FIG. 3, the thrust washer 1 is manufactured mainly through a preparation step S1, a component forming step S2, and a joining step S3.

  The preparation step S1 is a step of preparing the material N. As shown in FIG. 4A, the material N is a rectangular plate member. The material N is formed of an appropriate material (for example, a steel plate formed of a single type of metal material or a bimetal material formed of a plurality of types of metal materials). The material N is arranged in a state where the longitudinal direction is directed in the vertical direction. The width of the material N in the short direction (left-right direction) is formed to be the same as the width W of the component member 10.

  After the preparation step S1, the constituent member formation step S2 is performed.

  The constituent member forming step S2 is a step of obtaining the constituent member 10 by processing the material N prepared in the preparing step S1. As shown in FIG.4 (b), in the structural member formation process S2, the raw material N is cut | disconnected into plurality using an appropriate machine tool. At this time, the material N is cut so that the cut surface (the surface from which the material N is cut) is inclined with respect to the short direction (left-right direction). Specifically, the material N is cut so that the cut surface is inclined downward or downward to the left. In addition, the material N is cut such that the lower right cut surface and the left lower cut surface are alternately arranged along the longitudinal direction.

  Here, the first bottom surface 11 and the second bottom surface 12 of the component member 10 are formed in straight lines parallel to each other. For this reason, the said 1st bottom face 11 and the 2nd bottom face 12 can be formed using the right-and-left both sides | surfaces (surface formed in front view linear form) of the raw material N. FIG. Moreover, the 1st end surface 13 and the 2nd end surface 14 of the structural member 10 can be formed by arrange | positioning the lower right cut surface and the left lower cut surface alternately. In this way, a plurality of constituent members 10 can be obtained from the material N.

  Thus, the left and right side surfaces of the material N can be used as the first bottom surface 11 and the second bottom surface 12 as they are without any additional processing. In addition, the constituent members 10 can be obtained from the material N without any gaps by alternately arranging the lower right cut surfaces and the left lower cut surfaces. In addition, the inclination angle of the cut surface and the interval between the cut surfaces are appropriately set so that the constituent member 10 having a desired shape can be obtained.

  After the constituent member forming step S2, the joining step S3 is performed.

  The joining step S3 is a step for joining the constituent members 10 obtained in the constituent member forming step S2 to each other. Specifically, as shown in FIG. 5A, first, the first end face 13 of one constituent member 10 (constituent member 10A) and the second end face 14 of another constituent member 10 (constituent member 10B) are contacted. Touched. At this time, the first bottom surface 11 of the component member 10A and the first bottom surface 11 of the component member 10B are arranged so as to face the same side. At this time, the one constituent member 10 and the other constituent member 10 are positioned so as to be positioned on the same plane (a plane perpendicular to the front-rear direction). Thereby, desired flatness can be ensured. In this state, the constituent members 10 are joined together by an appropriate method (for example, laser welding).

  In particular, when the constituent member 10 is formed of a bimetal material using different materials on the front surface and the back surface, and any one of the materials cannot be welded, the penetration depth is adjusted relatively accurately. It is desirable to use laser welding that is possible. Thereby, only the material which can be welded can be melt | dissolved and the structural member 10 can be joined reliably.

  Next, as shown in FIG. 5B, another component member 10 (component member 10C) is joined to the two component members 10 that have been welded. Specifically, the first end surface 13 of the constituent member 10B and the second end surface 14 of the constituent member 10C are joined in contact with each other.

  Thus, in joining process S3, joining of the structural members 10 is repeatedly performed. At this time, by checking the flatness every time the constituent members 10 are joined, a desired flatness can be ensured in the entire thrust washer 1. In this way, the thrust washer 1 including the five constituent members 10 is formed (see FIG. 1). In this way, the plurality of constituent members 10 are joined to each other while checking the flatness, so that the flatness is ensured as compared with the case where the thrust washer 1 is formed by one member (one arc-shaped plate). It becomes easy to do.

  In the preparation step S1, the material N having the width W is prepared. However, the shape of the material N is not limited to this. That is, a material N having a width in the left-right direction wider than the width W may be prepared. In this case, in the constituent member forming step S2, for example, the constituent member 10 can be obtained by processing the material N as shown in FIG.

  In the example shown in FIG. 6A, a plurality of constituent members 10 whose longitudinal direction is in the left-right direction can be obtained by punching out the material N using a predetermined mold. In the example, a plurality of constituent members 10 are punched along the vertical direction. At this time, by punching the material N so that the first bottom surface 11 of one component member 10 and the second bottom surface 12 of the component member 10 adjacent to the component member 10 are in contact with each other, a gap between the component members 10 is formed. The waste of the material N can be reduced.

  In the example shown in FIG. 6B, a plurality of constituent members 10 whose longitudinal direction is directed in the vertical direction can be obtained by punching out the material N using a predetermined mold. In the example, a plurality of component members 10 are punched along the left-right direction and the up-down direction. At this time, the end faces (the first end face 13 and the second end face 14) of the adjacent constituent members 10 can be arranged in parallel by changing the direction of the constituent members 10 adjacent in the vertical direction in the left-right direction. Thereby, the clearance gap between the said adjacent structural members 10 can be reduced, and the waste of the raw material N can be reduced.

  In addition, the method of obtaining the structural member 10 from the raw material N is not limited to that shown in FIG. For example, in the example of FIG. 6A, the material N may be punched so that the first bottom surfaces 11 (or the second bottom surfaces 12) of the adjacent component members 10 are in contact with each other. In the example of FIG. 6B, the material N may be punched out so that the adjacent constituent members 10 are in contact with each other.

As described above, the thrust washer 1 according to the present embodiment is the thrust washer 1 (washer) formed in an arc shape by joining a plurality of constituent members 10 to each other, and the constituent member 10 includes the first bottom surface 11. At least one of the (inner peripheral surface) or the second bottom surface 12 (outer peripheral surface) is formed to be linear.
By comprising in this way, a material yield can be improved. That is, the inner peripheral surfaces or outer peripheral surfaces formed linearly in the constituent member 10 are opposed to each other, or the inner peripheral surface formed linearly using the side surface of the material N formed in a rectangular shape or By forming the outer peripheral surface, waste of the material N can be eliminated.

Further, the component member 10 is formed so that both the first bottom surface 11 and the second bottom surface 12 are linear.
By comprising in this way, a material yield can be improved effectively. That is, the waste of the material N can be effectively eliminated by using the first bottom surface 11 and the second bottom surface 12 formed in a straight line.

Moreover, the structural member 10 is formed so that the 1st bottom face 11 and the 2nd bottom face 12 may become parallel.
By comprising in this way, a material yield can be improved effectively. That is, the waste of the material N can be effectively eliminated using the first bottom surface 11 and the second bottom surface 12 formed in parallel.

Moreover, the component member 10 is formed so that the end surface (the 1st end surface 13 and the 2nd end surface 14) which connects the 1st bottom face 11 and the 2nd bottom face 12 may become linear form.
By comprising in this way, it can make it easy to join the structural members 10 comrades. That is, it is possible to facilitate the joining operation by forming the end faces to be joined in a simple shape. In particular, when the constituent members 10 are arranged in an arc shape, the thrust washer 1 can be easily formed by forming the end surfaces so that the end surfaces of the adjacent constituent members 10 come into contact with each other.

Further, the component member 10 is formed in a trapezoidal shape with the first bottom surface 11 as an upper base and the second bottom surface 12 as a lower bottom.
By comprising in this way, a material yield can be improved effectively. That is, the waste of the material N can be effectively eliminated by using the four sides of the constituent member 10 formed in a straight line.

Moreover, the structural member 10 is formed in an isosceles trapezoid shape.
By comprising in this way, a material yield can be improved effectively. That is, the waste of the material N can be effectively eliminated by using the four sides of the constituent member 10 formed in a straight line. Further, when the component N is obtained by processing the material N, it is easy to eliminate the gap between the adjacent component members 10, so that the waste of the material N can be eliminated more effectively.

The thrust washer 1 is formed in a semicircular shape by joining five constituent members 10.
With this configuration, the thrust washer 1 can be easily formed. That is, it is possible to make the thrust washer 1 as close to a circular arc as possible while keeping the number of joints as small as possible.

Moreover, the manufacturing method of the thrust washer 1 according to the present embodiment includes a preparation step S1 for preparing a plate-shaped material N, and a component member forming step S2 for obtaining a plurality of component members 10 formed in a trapezoidal shape from the material N. A joining step S3 for forming the arc-shaped thrust washer 1 by joining the plurality of constituent members 10 obtained in the constituent member forming step S2.
By comprising in this way, a material yield can be improved. That is, the waste of the material N can be effectively eliminated by using the four sides of the constituent member 10 formed in a straight line.

The thrust washer 1 according to the present embodiment is an embodiment of the washer according to the present invention.
Moreover, the 1st bottom face 11 which concerns on this embodiment is one Embodiment of the internal peripheral surface which concerns on this invention.
Moreover, the 2nd bottom face 12 which concerns on this embodiment is one Embodiment of the outer peripheral surface which concerns on this invention.
Moreover, the 1st end surface 13 and the 2nd end surface 14 which concern on this embodiment are one Embodiment of the end surface which concerns on this invention.

  Below, the thrust washer 101 which concerns on 2nd embodiment is demonstrated using FIG. The thrust washer 101 according to the second embodiment is different from the thrust washer 1 according to the first embodiment in that a structural member 110 having a shape different from that of the structural member 10 is provided instead of the structural member 10. is there. Therefore, below, the difference in shape between the constituent member 110 and the constituent member 10 according to the first embodiment will be described. In addition, the same code | symbol is attached | subjected to the location corresponding to the structural member 10 which concerns on 1st embodiment among the structural members 110, and description is abbreviate | omitted suitably.

  Chamfering is performed on both end portions (vertex V) of the second bottom surface 12 of the component member 110. Specifically, processing (R chamfering processing) is performed so that the vertex V of the component member 110 has an arc shape having a predetermined radius. Thereby, the corner | angular part of the vertex V like the structural member 10 (refer FIG. 1 etc.) which concerns on 1st embodiment is lose | eliminated. For this reason, the width | variety of the structural member 110 can be enlarged until the vertex V where the said chamfering process was performed contact | connects the circumference C1. FIG. 7 shows an example (width W + a) in which the width of the constituent member 110 is larger than the width W of the constituent member 10 by a.

  Thus, by chamfering the apex V of the component member 110, the width of the component member 110 can be increased within a predetermined dimension (circumference C1). Thereby, the area (sliding area) of the constituent member 110 can be increased.

As described above, the constituent member 110 according to the present embodiment is such that chamfering is performed on both end portions of the second bottom surface 12.
By comprising in this way, it can be made easy to ensure a sliding area. That is, since the corner portion of the second bottom surface 12 is eliminated, the width of the component member 110 can be increased, and the sliding area can be increased.

  The chamfering process is not limited to the circular arc shape (R chamfering) as shown in FIG. 7A, but may be a linear shape (C chamfering) or the like.

  Below, the thrust washer 201 which concerns on 3rd embodiment is demonstrated using FIG. The thrust washer 201 according to the third embodiment is different from the thrust washer 1 according to the first embodiment in that it includes six constituent members 210 instead of the five constituent members 10. Therefore, the difference will be described below. In addition, the same code | symbol is attached | subjected to the location corresponding to the structural member 10 which concerns on 1st embodiment among the structural members 210, and description is abbreviate | omitted suitably.

  The angle formed by the first bottom surface 11 and the first end surface 13 of the component member 210 and the angle formed by the first bottom surface 11 and the second end surface 14 are formed to be 105 degrees. The angle formed by the second bottom surface 12 and the first end surface 13 of the component 210 and the angle formed by the second bottom surface 12 and the second end surface 14 are formed to be 75 degrees.

  By combining six component members 210 formed in this way, the thrust washer 201 is formed in a semicircular shape centering on the point O (an arc shape with a central angle of 180 degrees). Further, a smoother arc-shaped thrust washer 201 can be obtained as compared with the case where five constituent members 10 are combined as in the first embodiment (see FIG. 1).

  Below, the thrust washer 301 which concerns on 4th embodiment is demonstrated using FIG.9 and FIG.10. The thrust washer 301 according to the fourth embodiment is different from the thrust washer 1 according to the first embodiment in that a structural member 310 having a shape different from that of the structural member 10 is provided instead of the structural member 10. is there. Therefore, the difference will be described below. In addition, the same code | symbol is attached | subjected to the location corresponding to the structural member 10 which concerns on 1st embodiment among the structural members 310, and description is abbreviate | omitted suitably.

  The second end surface 14 of the component member 310 is formed to be longer than the first end surface 13. More specifically, the second end surface 14 is formed so as to be more inclined than the first end surface 13 with respect to the short direction (width direction) of the component member 310. In this way, the component member 310 is formed in a trapezoidal shape in which the internal angles at both ends of the bottom side are not equal in a front view. That is, the component member 310 is not a line-symmetric shape.

  As shown in FIG. 9, a thrust washer 301 is formed by combining five constituent members 310 configured as described above. Specifically, the first end surface 13 of one component member 310 and the second end surface 14 of the other component member 310 are joined to each other. At this time, since the shapes (length, inclination angle, etc.) of the first end surface 13 and the second end surface 14 are different, it is possible to prevent the first end surfaces 13 or the second end surfaces 14 from being accidentally joined. it can. Accordingly, for example, when the component member 310 is formed of a bimetal material using different materials on the front surface and the back surface, it is possible to prevent an error that reverses the directions of the front surface and the back surface.

  Below, the thrust washer 401 which concerns on 5th embodiment is demonstrated using FIG.11 and FIG.12. The thrust washer 401 according to the fifth embodiment is different from the thrust washer 301 according to the fourth embodiment in that a structural member 410 having a shape different from that of the structural member 310 is provided instead of the structural member 310. is there. Therefore, the difference will be described below. In addition, the same code | symbol is attached | subjected to the location corresponding to the structural member 310 which concerns on 4th embodiment among the structural members 410, and description is abbreviate | omitted suitably.

  The difference between the constituent member 410 and the constituent member 310 of the fourth embodiment is that the first end face 13 and the second end face 14 are formed to have the same length. For this reason, the first bottom surface 11 and the second bottom surface 12 of the component member 410 are not parallel to each other.

  As shown in FIG. 11, a thrust washer 401 is formed by combining five constituent members 410 configured as described above. At this time, since the lengths of the first end surface 13 and the second end surface 14 are the same, the first bottom surfaces 11 and the second bottom surfaces 12 of the adjacent constituent members 410 are smoothly connected so as to be continuous.

  The embodiment of the present invention has been described above, but the present invention is not limited to the above-described configuration, and various modifications can be made within the scope of the invention described in the claims.

  For example, the washer is not limited to an application (thrust washer) that receives a load in the thrust direction, and can be used for any application.

  Further, the washer is not limited to a semicircular shape (arc shape with a central angle of 180 degrees), but other arc shapes (for example, an arc shape with a central angle of 90 degrees, an arc shape with a central angle of 60 degrees). Etc.).

  In addition, it is sufficient that at least one of the inner peripheral surface and the outer peripheral surface of the constituent member is formed in a linear shape.

  Moreover, the component member does not necessarily have to be formed so that the inner peripheral surface and the outer peripheral surface are parallel to each other.

  Further, the number of constituent members forming the washer is not limited to the above embodiment. That is, the number of constituent members may be 4 or less, or 7 or more.

  Moreover, all the structural members which form a washer are not restricted to the same shape. That is, the washer can be formed using a plurality of constituent members having different shapes (length in the longitudinal direction, etc.).

  Further, all the constituent members forming the washer may not be formed of the same material. For example, only some components are made of a high-performance sliding material with a low coefficient of friction, high wear resistance, etc., and other components are made of a relatively inexpensive material, so that the performance of the washer The cost can be reduced while securing the cost.

  In addition, the plurality of constituent members can be joined by various methods (welding, welding, brazing, caulking, etc.).

DESCRIPTION OF SYMBOLS 1 Thrust washer 10 Structural member 11 1st bottom face 12 2nd bottom face 13 1st end surface 14 2nd end surface

Claims (9)

A washer formed in an arc shape by joining a plurality of constituent members to each other,
The component member is
It is formed so that at least one of the inner peripheral surface or the outer peripheral surface is linear.
Washer. The component member is
Both the inner peripheral surface and the outer peripheral surface are formed so as to be linear.
The washer according to claim 1. The component member is
The inner peripheral surface and the outer peripheral surface are formed in parallel.
The washer according to claim 2. The component member is
An end surface connecting the inner peripheral surface and the outer peripheral surface is formed to be linear.
The washer according to any one of claims 1 to 3. The component member is
Formed in a trapezoidal shape with the inner peripheral surface as the upper base and the outer peripheral surface as the lower base,
The washer according to any one of claims 1 to 4. The component member is
Formed in the shape of an isosceles trapezoid,
The washer according to claim 5. The component member is
Chamfering is applied to both ends of the outer peripheral surface,
The washer according to any one of claims 1 to 6. A semicircular shape is formed by joining five of the constituent members,
The washer according to any one of claims 1 to 7. A preparation process for preparing a plate-shaped material;
A component forming step for obtaining a plurality of components formed in a trapezoidal shape from the material;
A joining step of forming an arc washer by joining the plurality of constituent members obtained in the constituent member forming step;
A washer manufacturing method comprising:

Images