JP2016106034A - Method of manufacturing hollow cylindrical ring member and hollow cylindrical ring member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce waste of materials as much as possible.SOLUTION: A method of manufacturing a hollow cylindrical ring member comprises: a first process of forming a tabular slender blank material with width and length corresponding to height and peripheral length of the hollow cylindrical ring member; a second process of forming an engaging part capable of engaging into each other, comprising a projection part widening toward end edge sides and a recess contracting toward the end edge sides on both ends in a longitudinal direction of the blank material; a third process of engaging the projection part into the recess from a thickness direction of the blank material, and in which the projection part engages to be impossible to be detached from the recess in a peripheral direction to be made into a ring member in a state of annularly deforming the blank member so that a width direction of the blank member becomes a height direction; and a forth process of forming a deformation part consisting of a side part located in the height direction of the hollow cylindrical ring member, a surface crossing the side part at a predetermined angle or an orthogonal surface by applying pressure from the other end side to one end or both ends in the height direction of the hollow cylindrical ring member.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method for manufacturing a hollow cylindrical ring member and a hollow cylindrical ring member.

  The metallic hollow cylindrical ring member is used as, for example, a shock absorber that absorbs vibrations and shocks when the vehicle is traveling, a vibration damper for construction, or a vehicle body damper of a railway vehicle. Shock absorbers and dampers used in these applications are usually provided with a piston that slides in a cylinder filled with oil. The hollow cylindrical ring member is provided with a rubber lining on the outer periphery, and is used as a seal part to be installed in the cylinder in order to prevent oil from flowing out without hindering the sliding movement of the piston.

  By the way, the hollow cylinder type ring member used for the above-mentioned uses was conventionally manufactured as follows. First, a hollow cylindrical ring member having a large diameter of 100 mm or more is cut into a blank material by cutting a solid round bar having the same diameter as the ring member to be manufactured with a predetermined thickness, and the inner surface of this blank material is cut. The hollow cylindrical ring member was removed by processing. Moreover, a hollow cylindrical ring member having a medium diameter to a small diameter of 100 mm or less is cut into a blank from a plate material having a required thickness to form a blank, and a bottomed cylindrical intermediate is formed by drawing or pressing, After that, the hollow body ring member was obtained by cutting and removing the bottom of the intermediate body. However, the conventional method for manufacturing a hollow cylindrical ring member has the following problems.

JP 2004-255385 A JP 2010-029885 A

  That is, in the manufacturing method of the above-described large-diameter hollow cylindrical ring member, since the inner surface side of the blank material is removed by cutting, a lot of material is wasted. In addition, in the method of manufacturing the hollow cylinder ring member having a medium diameter and a small diameter, a circular blank is cut out from a plate-like material, and further, the bottom portion of the intermediate body is cut and removed. There was a problem.

  The present invention has been made in view of such conventional problems, and the object of the present invention is to provide a method for manufacturing a hollow cylindrical ring member that can prevent the waste of materials as much as possible, and a hollow The object is to provide a cylindrical ring member.

  In order to achieve the above object, a manufacturing method according to the present invention is a flat cylindrical elongated member having a width and a length corresponding to the height and circumferential length of the hollow cylindrical ring member in the manufacturing method of a hollow cylindrical ring member. 1st process which forms a blank material, and the both ends of the longitudinal direction of the said blank material are equipped with the protrusion part which expands toward an edge side, and the recessed part which shrinks | reduces toward an edge side. In the second step of forming a simple fitting portion and in a state where the width direction of the blank material is annularly deformed so as to be the height direction, the projection portion is fitted into the concave portion from the thickness direction of the blank material. In combination, the projecting portion is locked in the circumferential direction so as not to be detached from the concave portion to form a ring member, and one end side or both end sides in the height direction of the hollow cylindrical ring member, By applying pressure from the end side, the hollow cylindrical ring member A side located in the direction to, is characterized by comprising a fourth step of forming a deformable portion made of plane or perpendicular surfaces intersect in the side at a predetermined angle, a.

  Moreover, the said invention WHEREIN: The said fitting part is formed so that two sets may be paralleled in the both ends of the said blank material, It is characterized by the above-mentioned.

  The hollow cylindrical ring member according to the present invention is a hollow cylindrical ring member having a predetermined height and closed in the circumferential direction, and corresponds to the height and circumferential length of the hollow cylindrical ring member. The blank material includes protrusions that are widened toward the edge side and concave portions that are narrowed toward the edge side, formed at both ends in the longitudinal direction of the flat and slender blank material having a width and a length. A fitting portion that is fitted in an annularly deformed state so that the width direction is the height direction, a side portion that is positioned in the height direction of the hollow cylindrical ring member, the side portion and a predetermined portion And a deformable portion comprising a plane intersecting at an angle or an orthogonal plane.

  According to the manufacturing method of the hollow cylindrical ring member and the hollow cylindrical ring member having the above-described configuration, the material is substantially wasted when the fitting portion including the protruding portion and the recessed portion is formed. This occurs only by removing the periphery of the substrate and removing the through hole in the recess, and waste is drastically reduced as compared with the conventional manufacturing method.

According to the method of manufacturing a hollow cylindrical ring member and the hollow cylindrical ring member according to the present invention, a flat and slender blank material having a width and a length corresponding to the height and circumferential length of the hollow cylindrical ring member, In the state of being deformed in an annular shape, the protrusion is fitted into the recess, and the protrusion is locked so as not to be detached from the recess in the circumferential direction to form a ring member, so that material waste is greatly reduced.

It is explanatory drawing of the 1st process of the manufacturing method of the hollow cylindrical ring member concerning this invention. It is explanatory drawing of the 2nd process performed following FIG. It is explanatory drawing of the 2nd process performed subsequent to FIG. It is a perspective view of the molded product obtained by the process up to FIG. FIG. 3 is an explanatory diagram of a process performed subsequent to the process of FIG. 2. It is explanatory drawing of the process performed following the process of FIG. FIG. 7 is a perspective view and a sectional view of a molded product obtained through the steps up to FIG. 6. It is explanatory drawing of the process performed following the process of FIG. It is explanatory drawing of the process performed following the process of FIG. FIG. 10 is a perspective view and a sectional view of a molded product obtained through the steps up to FIG. 9. It is explanatory drawing which shows the other example of the fitting structure which can be used for the hollow cylindrical ring member concerning this invention. It is explanatory drawing which shows the other example of the fitting structure which can be used for the hollow cylindrical ring member concerning this invention. It is explanatory drawing which shows the other example of the fitting structure which can be used for the hollow cylindrical ring member concerning this invention. It is sectional drawing and the perspective view which show the other example of the hollow cylindrical ring member concerning this invention. It is sectional drawing and the perspective view which show the other example of the hollow cylindrical ring member concerning this invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. FIGS. 1-10 has shown one Example of the manufacturing method of the hollow cylindrical ring member concerning this invention, and one Example of the hollow cylindrical ring member obtained by the manufacturing method. FIG. 1 shows a first step of the production method of the present invention. In the first step shown in the figure, an elongated blank 10 having a predetermined thickness and having a width W and a length L corresponding to the height h and the circumferential length l of the hollow cylindrical ring member to be manufactured is obtained. It is formed by cutting the material.

  FIG. 2 shows a second step performed subsequent to the step of FIG. In the second step, the fitting portion 12 is formed at the end portion of the blank material 10. The fitting part 12 of the present embodiment is composed of a protruding part 12a formed in a substantially trapezoidal shape and a recessed part 12b formed in a substantially trapezoidal shape capable of fitting the protruding part 12a. The protruding portion 12a is disposed on one end side in the longitudinal direction of the blank member 10, and has a widened shape in which the width increases toward the end edge side. Moreover, the recessed part 12b is arrange | positioned at the other end side of the longitudinal direction of the blank material 10, it is a hole part which penetrates the blank material 10 in a plate | board thickness direction, an outer edge opens, and toward an edge side, It has a reduced width that shrinks in width.

  In addition, the shape of the protrusion part 12a and the recessed part 12b of the fitting part 12 is not restricted to the shape shown in figure, For example, if it is a shape which expands or reduces toward the edge side, for example, a circle, an ellipse, a triangle Or a polygon.

  3 and 4 show a third step performed subsequent to the step of FIG. The third step is a step of forming the blank material 10 in an annular shape so that the width direction of the blank material 10 is in the height direction, and an annular forming die 14 is used for this forming, as shown in FIG. The annular mold 14 includes a lower mold 14a and an upper mold 14b, and a circular groove 14c for annular molding is formed in the lower mold 14a. The upper die 14b is inserted into the circular groove 14c of the lower die 14a, and has a circular portion at the tip.

  When the blank material 10 is formed into an annular shape, the blank material 10 is positioned on the circular groove 14c of the lower mold 14a, the upper mold 14b is lowered from above, and between the circular groove 14c and the upper mold 14b. The blank material 10 is deformed so as to be sandwiched and formed into an annular shape. And in the state which deformed the blank material 10 cyclically | annularly in this way, the projection part 12a is fitted in the recessed part 12b from the thickness direction of the blank material 10. FIG. The means for forming the blank material 10 in an annular shape is not limited to the mold forming shown in the present embodiment, and may be, for example, a roll former.

  In this case, since the protrusion 12a is widened in the edge direction and the recess 12b is reduced in the edge direction, when the fitting of the protrusion 12a and the recess 12b is finished, the protrusion 12a is It is locked so as not to be disengaged from the recess 12b in the circumferential direction. When performing such fitting connection, if the annular diameter of the blank material 10 is fitted so that it is slightly smaller than the desired diameter, the blank material 10 springs back when the fitting is completed, The locking connection between the protrusion 12a and the recess 12b is deepened, and as a result, it is further strengthened.

  FIG. 4 is a perspective view of a hollow cylindrical ring member 16 obtained by deforming the blank material 10 into an annular shape and fitting and coupling the projections 12a and the recesses 12b. The width W of 10 is the height h of the upright side portion 16a, and the length L is the circumferential length of the upper and lower ends of the side portion 16a of the ring member 16.

  5-10 has shown the detail of the 4th process of forming a deformation | transformation part in the edge part of the up-down direction of the side part 16a of the ring member 16 obtained at the 3rd process. In the case of the present embodiment, the deforming portion forms an intersecting deforming portion 16a that intersects the side portion 16a at a predetermined angle in the first stage, and has a plane orthogonal to the side portion 16a in the subsequent second stage. A deformation portion 16c is formed.

  When forming the intersecting deformed portion 16b, the deformed portion forming first mold 18 shown in FIGS. 5 and 6 is used. The first mold 18 shown in these drawings includes a lower mold 20 and an upper mold 22. The lower mold 20 includes an annular recess 20 a into which the side portion 16 a of the ring member 16 can be inserted, and the annular mold 20. And an inwardly inclined surface 20b provided at the lower end of the recess 20a. On the other hand, the upper die 22 includes a convex portion 20a inserted into the side portion 16a of the ring member 16, and a step portion 20b formed with the convex portion 20a. The truncated cone portion 20c is at the forefront of the convex portion 20a. Is provided.

  The side part 16a of the ring member 16 is mounted on the outer periphery of the convex part 20a of the upper mold 22 of the first mold 18 and the tip side thereof is inserted into the annular concave part 20a of the lower mold 20, and the upper mold 22 is inserted. When the upper die 22 is pushed down to the lower die 20 side, pressure is applied from the upper end side of the side portion 16a toward the lower end side as shown in FIG. The side is gradually deformed along the inwardly inclined surface 20b. When the mold clamping is completed, as shown in FIG. 6, the lower end side of the side portion 16a is deformed by being sandwiched between the inwardly inclined surface 20b and the truncated cone portion 22c. An inclined deformation portion 16b that is inclined at a predetermined angle is formed.

  FIG. 7 shows an appearance and a cross section of the ring member 16 having the intersecting deformed portion 16b formed by the first deformable portion forming mold 18. As shown in FIG. In this embodiment, the intersection deforming portion 16b is inclined at a predetermined angle toward the inward side at the lower end of the side portion 16a. 5 and 6, when the upper die 22 is lowered toward the lower die 20 river, pressure is applied to the side portion 16a from the upper end side toward the lower end side. Therefore, the fitting portion 12 constituted by the protruding portion 12a and the recessed portion 12b receives this pressure, and the vertical gap between the protruding portion 12a and the recessed portion 12b is narrowed, and the fitting connection is further strengthened. .

  8 and 9 show a process of forming an orthogonal deformation portion 16c orthogonal to the side portion 16a at the lower end of the side portion 16a. When forming the orthogonal deformation part 16c, the deformation | transformation part formation 2nd type | mold 24 shown to FIG. 8,9 is used. The second mold 24 shown in these drawings has a lower mold 26 and an upper mold 28, and the lower mold 26 is formed with an annular recess 26a into which the side portion 16a of the ring member 16 can be inserted. The bottom surface of the annular recess 26a is flat. On the other hand, the upper die 28 includes a convex portion 28a inserted into the side portion 16a of the ring member 16 and a step portion 28b in which the convex portion 28a is formed, and the tip of the convex portion 28a has a flat surface. ing.

  On the outer periphery of the convex portion 28a of the upper die 28 of the second die 24, the side portion 16a of the ring member 16 in which the intersecting deformed portion 16b is formed by the first molding die 18 is attached, and the tip side is lowered. When inserted into the annular recess 26a of the die 26 and the upper die 28 is pushed down to the lower die 26 side, pressure is applied from the upper end side of the side portion 16a toward the bearing side as shown in FIG. When 28 is close to the lower mold 26 side, the cross-deformed portion 16b provided on the lower end side of the side portion 16a comes into contact with the bottom surface of the annular recess 26a and gradually deforms. When the mold clamping is completed, as shown in FIG. 9, the intersecting deformed portion 16b is sandwiched and deformed by the tip of the convex portion 28a, thereby forming an orthogonal deformed portion 16c having a surface orthogonal to the side portion 16a. .

  FIG. 10 shows an appearance and a cross section of the ring member 16 having the orthogonal deformation portion 16c formed by the second mold 24 for deformation portion formation. In this embodiment, the orthogonal deforming portion 16c is provided at the lower end of the side portion 16a and extends inward toward the inward side so as to be orthogonal to the side portion 16a. In the process of forming the orthogonal deformation portion 16c shown in FIGS. 8 and 9, since pressure is applied to the side portion 16a from the upper end side to the lower end side, the fitting formed by the protrusion portion 12a and the recess portion 12b. The joint 12 receives this pressure, and the gap in the vertical direction between the protrusion 12a and the recess 12b is narrowed, and the fitting and coupling is further strengthened.

  Now, according to the manufacturing method of the hollow cylindrical ring member 16 manufactured by the above processes and the ring member 16 obtained by the manufacturing method, the width corresponding to the height and circumferential length of the hollow cylindrical ring member 16 In a state in which the flat and slender blank 10 having a length is deformed in an annular shape, the protrusion 12a is fitted into the recess 12b, and the protrusion 12a is locked from the recess 12b in a circumferential direction so as not to be detached. Since the ring member is used, the waste of material is extremely reduced. More specifically, the material is substantially wasted when removing the periphery of the protrusion 12a and the through hole of the recess 12b when forming the fitting part 12 composed of the protrusion 12a and the recess 12ab. It occurs only in the removal of wastewater, and waste is drastically reduced as compared with the conventional manufacturing method.

  In the above-described embodiment, the case where the orthogonal deformation portion 16c perpendicular to this is formed at the lower end of the side portion 16a as the hollow cylindrical ring-shaped member is illustrated, but the implementation of the present invention is limited to this. For example, when the deforming portions 16b and 16c are not provided, the steps after FIG. 5 are not required, and when only the intersecting deforming portion 16b is formed at the lower end of the side portion 16a, FIG. Subsequent steps are not required.

  FIG. 11 shows a modification of the fitting portion provided at the end portion of the blank member 10 that can be employed in the practice of the present invention. In the example shown in FIG. 5A, the fitting portion 120 has a configuration in which two sets having the same configuration are arranged in parallel. That is, the fitting part 120 has the protrusion part 120a and the recessed part 120b similarly to the said Example, and the two protrusion parts 120a are formed in the one end side of the blank material 10 at intervals, and the other end side. Two recesses 120b are formed at a distance from each other. In such a configuration of the fitting portion, in addition to the operational effects shown in the above-described embodiment, the fitting connection increases, so that the coupling state becomes strong.

  In the example shown in FIG. 11B, two sets of fitting portions 121 are formed in the blank member 10, but in this example, the protruding portion 121a and the recess portion 121b are spaced on one end side of the blank member 10. A recess 121b and a protrusion 121a are formed on the other end side with a gap therebetween. In such a configuration of the fitting portion, in addition to the operational effects shown in the above-described embodiment, the coupling and coupling are increased, and the acting forces acting in the circumferential direction are opposite to each other, so that the coupling state is further increased. Become strong.

  FIG. 12 shows still another example of the fitting portion 122 arranged on the blank material 10. The fitting portion 122 shown in this figure includes a protrusion 122a and a recess 122b, as in the above embodiment. In the case of this example, the fitting part 122 is interposed between the side part 16a of the hollow cylindrical ring-shaped member 16 and the orthogonal deformation part 16c. In addition, the orthogonal deformation | transformation part 16c may be the cross deformation | transformation part 16b. According to the fitting part 122 configured as described above, the following effects are produced in addition to the operational effects of the above-described embodiment. That is, since the fitting part 122 of the present embodiment is arranged so as to straddle between the side part 16a of the hollow cylindrical ring-shaped member 16 and the orthogonal deformation part 16c, the fitting connection on the side part 16a side. When trying to release, the end portions of the side portions 16a are to be separated from each other in the thickness direction, that is, the inner and outer directions of the ring. Then, since the concave and convex shapes come into contact with each other and compete to act so as to prevent the release on the side portion 16a side, the coupled state is further strengthened.

  FIG. 13 shows still another example of the fitting portion 123 arranged on the blank member 10. Similar to the example shown in FIG. 11, the fitting portion 123 shown in this figure includes two sets of protrusions 123a and recesses 123b. In the case of this example, the fitting portion 123 has one set of projections 123a and recesses 123b arranged on the side 16a of the hollow cylindrical ring-shaped member 16, and the other set of projections 123a and recesses 123b. Are arranged in the orthogonal deformation portion 16c. In addition, the orthogonal deformation | transformation part 16c may be the cross deformation | transformation part 16b. According to the fitting part 122 configured in this way, in addition to the operational effects of the above embodiment, the same operational effects as the example shown in FIG. 12 can be obtained.

  FIG. 14 shows another embodiment of the hollow cylindrical ring member 160 according to the present invention. In the embodiment shown in this figure, the ring member 160 has a cylindrical side portion 160a, an orthogonal deformation portion 160c is formed at the upper and lower ends thereof, and three sets of fitting portions 124 are provided. The sets are arranged on the side portion 160, and the remaining two sets are arranged on the orthogonal deformation portion 160c. Also in the ring member 160 configured in this way, the same operational effects as the above-described embodiment are exhibited.

  FIG. 15 shows another embodiment of the hollow cylindrical ring member 161 according to the present invention. In the embodiment shown in this figure, the ring member 161 has a cylindrical side portion 161a, a pair of orthogonal deformation portions 161c are formed at the upper and lower ends thereof, and the fitting portion 125 is disposed on the side portion 161a. ing. The orthogonal deformation portion 161c has a lower end extending outwardly from an end of the side portion 161a, has a flange shape, and an upper end side extends inward. Also in the ring member 161 configured as described above, the same function and effect as the above-described embodiment can be obtained.

  In the above embodiment, the case where the side portion has a circular cross section is illustrated as the hollow cylindrical ring member. However, the implementation of the present invention is not limited to this, for example, an elliptical cross section or a polygonal cross section. It can be applied to any shape.

  As described above in detail in the embodiments, according to the method for manufacturing a hollow cylindrical ring member and the ring member according to the present invention, a seal ring such as a shock absorber and a damper, a mounting ring for an electric lighting device, Since it can be applied to fastening rings such as pipes and hoses, it can be used effectively in these technical fields.

DESCRIPTION OF SYMBOLS 10 Blank material 12 Fitting part 12a Protrusion part 12b Recessed part 14 Annular shaping | molding die 16 Hollow cylindrical ring member 16a Side part 16b Cross deformation part 16c Orthogonal deformation part

Claims (3)

In the manufacturing method of the hollow cylindrical ring member,
A first step of forming a flat and slender blank material having a width and a length corresponding to the height and circumference of the hollow cylindrical ring member;
2nd process of forming the fitting part which can be mutually fitted with the protrusion part which expands toward the edge side, and the recessed part which reduces toward the edge side in the both ends of the longitudinal direction of the said blank material When,
In a state where the width direction of the blank material is annularly deformed so as to be the height direction, the protrusion is fitted into the recess from the thickness direction of the blank material, and the protrusion is rotated from the recess. A third step of locking in a non-removable direction to form a ring member;
By applying pressure from the other end side to one end side or both end sides in the height direction of the hollow cylindrical ring member, a side portion positioned in the height direction of the hollow cylindrical ring member, the side portion and a predetermined portion A fourth step of forming a deformed portion consisting of a plane intersecting at an angle or an orthogonal plane;
A method for producing a hollow cylindrical ring member, comprising: The fitting portion is formed so that two sets are arranged in parallel at both ends of the blank material.
The manufacturing method of the hollow cylindrical ring member of Claim 1 characterized by the above-mentioned. A hollow cylindrical ring member having a predetermined height and closed in the circumferential direction,
Protrusions formed at both ends in the longitudinal direction of a flat and slender blank material having a width and a length corresponding to the height and circumference of the hollow cylindrical ring member, and widening toward the edge side, A recessed portion that is reduced in width toward the edge side, and a fitting portion that is fitted in an annularly deformed state so that the width direction of the blank material is in the height direction;
Side portions located in the height direction of the hollow cylindrical ring member;
A deformed portion composed of a plane intersecting the side portion at a predetermined angle or an orthogonal plane;
A hollow cylindrical ring member comprising:

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