JP4192246B2 - Manufacturing method of annular support and molding apparatus therefor - Google Patents

Description

  The present invention relates to a method for manufacturing an annular support and a molding apparatus therefor, and in particular, is preferably used for manufacturing an annular support (so-called support ring) made of high-strength steel used in a core type run flat system. The present invention relates to a method for manufacturing an annular support and a molding apparatus therefor.

  Conventionally, many related technologies of a run flat system that can make an emergency run of about several hundred km even when an air-filled tire used in a passenger car or the like leaks air during running have been proposed. Several types of this run-flat system have been proposed. Especially in large sedans and SUV (Sports Utility Vehicle) type passenger cars with high flatness tires, the inside of the tire and the outer periphery of the wheel In many cases, a core-type run-flat system configured by attaching an annular support to a (rim) is used.

  As shown in FIG. 5, the core-type run flat system is configured such that when the tire 108 adopting the core type run-flat system leaks air, the annular support 103 is connected to the vehicle ( It is a mechanism that supports (not shown). This core type run flat system has an annular shape formed into a molding pattern 104 having two annular convex portions 104a, 104b projecting outward in the radial direction and smooth-shaped ear portions 106A, 106B formed in the vicinity of the peripheral edge portion. A support body 103 and a rubber-made annular elastic member 107 disposed on the ear portions 106A and 106B of the annular support body 103 are provided. This annular support 103 must support a vehicle having a weight of 1 ton or more (in the case of a large sedan or SUV type passenger car) without deformation, so that yield stress or 0.2% proof stress called so-called high-tensile steel is used. It is necessary to use high-tensile steel with high strength. Therefore, it is very difficult to mold the molding pattern 104 on the annular support 103.

  Here, an example of a method for manufacturing the conventional annular support 103 will be described. Conventionally, in order to manufacture the annular support 103 of the core type run flat system, the strip is first drawn from the supply roll and cut into a rectangular flat plate. After cutting, this is bent into a cylindrical shape, and the closed annular body 102 is obtained by welding the ends together. And the cyclic | annular support body 103 which has the shaping | molding pattern 104 was manufactured by shape | molding the shaping | molding pattern 104 to this annular body 102 in steps by two shaping | molding processes (patent document 1).

  The two molding processes described above will be described in detail. In the first molding process, as shown in FIGS. 6A and 6B, the first molding apparatus 101 compresses the annular body 102 in the axial direction PD. The two annular convex portions 104a and 104b of the molding pattern 104 are initially molded by pressing the molding roll 110A against the side wall of the annular body 102 from the inside of the annular body 102. First, as shown in FIG. 6A, the annular body 102 is placed in a horizontal position, and its lower edge 102a is inserted into an annular receiving groove 131a of a plate 130 supported by a ball bearing horizontally. The upper edge portion 102b of the annular body 102 is inserted into the annular receiving groove 121a of the upper lid 120 supported by the ball bearing. While the upper lid 120 is formed to be movable in the axial direction PD of the annular body 102 by a hydraulic cylinder (not shown) dedicated to the upper lid 120, the other plate 130 is fixed. In the axial direction PD.

  A forming roll 110 </ b> A that is forcibly rotated by a gear motor (not shown) is disposed on the plate 130 side inside the annular body 102. This forming roll 110A has an initial forming pattern 111A that does not protrude in the radial direction from the two annular projections 104a and 104b of the desired forming pattern 104 on its roll surface, as shown in FIG. 6 (b). As described above, when the annular body 102 is compressed by the hydraulic cylinder (not shown) dedicated to the forming roll 110A, the annular body 102 moves outward in the radial direction. Then, an initial molding pattern 111 </ b> A is transferred and molded on the annular body 102.

  In the second molding step, as shown in FIGS. 7A and 7B, the diameters of the peripheral portions 102a and 102b of the annular body 102 are reduced and molded by the second molding device 201. As shown in FIG. 7A, a forming roll 110B having the shape of two annular convex portions 104a and 104b of a desired forming pattern 104 is disposed inside the annular body 102 on which the initial forming pattern 111A is formed. The annular body 102 is pressed against the forming roll 110B by the disk-shaped roll 204 disposed outside the annular body 102. Then, the annular body 102 is rotated by rotationally driving the forming roll 110B by a hydraulic drive device (not shown).

  In this state, the diameters in the vicinity of the peripheral portions 102a and 102b of the annular body 102 are reduced by the two disk-shaped reducing rolls 202A, 202B, 203A, and 203B disposed in the vicinity of the peripheral portions 102a and 102b of the annular body 102. The reducing rolls 202A and 202B disposed inside the annular body 102 are attached so as to rotate eccentrically in a state where they can freely rotate with respect to the forming roll 110B. Further, the reduction rolls 203A and 203B disposed outside the annular body 102 are attached in a freely rotatable state. Then, while the annular body 102 rotates, the reduction rolls 202A, 202B, 203A, and 203B are moved slowly toward the center of the annular body 102 in the radial direction, thereby sandwiching the vicinity of the peripheral portions 102a and 102b of the annular body 102. 7B, the molding height of the annular projections 104a and 104b of the desired molding pattern 104 is molded from the initial molding pattern 111A, as shown in FIG. 106B is formed to produce the annular support 103.

  As described above, the annular support 103 having the final forming pattern 104 as shown in FIG. 5 is manufactured by the first and second forming steps described above.

JP-T-2005-504673

  However, in the molding method of Patent Document 1, the molding pattern 104 of the annular support 103 is molded by two molding processes. According to Patent Document 1, in order to balance the internal stress of the annular support 103, it is necessary to divide the processing into two steps. By requiring two molding steps, the productivity of the annular support 103 is reduced and the equipment costs due to the molding apparatuses 101 and 102 are increased.

  Even if it is attempted to manufacture the annular support body 103 by forming the final molding pattern 104 on the annular body 102 only by the first molding process, the molding roll 110A in the first molding process is fixed as shown in FIG. Since the annular support 103 ′ manufactured by only the first molding step is disposed on the fixed plate 130 side, as shown in FIGS. 8A and 8B, the fixed plate 130 is fixed. The plate thickness of the annular convex portion (left annular convex portion in FIG. 8) 104a ′ becomes thin, and the other annular convex portion (right annular convex portion in FIG. 8) 104b ′ becomes thick. The two annular projections are asymmetric, and the plate thickness distribution is not uniform as a whole. Furthermore, since the valley portion between the two annular convex portions 104a ′ and 104b ′ is displaced from the center (in FIG. 8, it is located on the right annular convex portion 104a ′ side), the desired molding pattern It is estimated that the molding pattern 104 ′ is greatly deformed compared to 104. And, as shown in FIG. 8 (c), the annular support 103 ′ has a portion with a small thickness as shown in FIG. In FIG. 8, there is a possibility that the left annular projection 104a ′) may break.

  Further, as shown in FIG. 8B, the annular support 103 ′ molded only by the first molding process has a large spring back (restoring force) due to the high proof stress of the high-strength metal as the raw material. Since it occurs in the support 103 ′, it cannot be made the same shape as the molding pattern 111A of the molding roll 110A, and the molding accuracy cannot be maintained. In the first forming step, the annular body 102 is expanded and formed in the radial direction to form the annular convex portion, so that the annular convex portion of the annular support 103 'is deformed by the spring back. Further, since the annular body 102 is compressed in the axial direction by the first molding step, the annular support 103 ′ is extended outward in the axial direction by the spring back, or the ear portions 106A ′ and 106B ′ of the annular support 103 ′. Warps outward in the radial direction of the annular support 103.

  Moreover, in the 1st shaping | molding process of patent document 1, as shown in FIG. 6, the forming roll 110A has only the initial forming pattern 111A which consists of two annular convex parts on the roll surface. Therefore, if the forming roll 110A is moved outward in the radial direction while compressing the annular body 102 in the axial direction PD, the annular body 102 is moved at the end of the portion formed by the two annular projections of the annular body 102. The compressing force is concentrated in the axial direction PD, and the side surface of the annular body 102 is recessed inward in the radial direction. Furthermore, when the end of the molding pattern 111A on the side surface of the annular body 102 is recessed inward in the radial direction, stress that causes the peripheral parts 102a and 102b of the annular body 102 to warp is generated, and the peripheral parts 102a and 102b of the annular body 102 are deformed. It spreads outward in the radial direction. Due to these deformations, there is a problem that the peripheral portion of the annular body 102 bites into the receiving grooves 121a and 131a of the upper lid 120 and the plate 130 of the molding apparatus 101, and the annular body 102 cannot be removed from the upper lid 120 and the plate 130. there were. In addition, even with the spring back described above, there is a possibility that the ear portions 106A 'and 106B' of the annular support 103 'are warped outward in the radial direction and become galling.

  Therefore, the present invention has been made in view of these points, and an annular support body that can be molded by only one molding process without dividing the molding process for molding a curved wave-shaped molding pattern into a plurality of processes. It aims at providing the manufacturing method and the shaping | molding apparatus used for the manufacturing.

  Another object of the present invention is to provide a method for manufacturing an annular support and a molding apparatus used for the production that can obtain a desired molding pattern even if a springback occurs after molding of the molding pattern. .

  Another object of the present invention is to provide an annular support molding device that can easily remove the annular support from the mounting portion of the molding device after molding the molding pattern.

In order to achieve the above-described object, the manufacturing method of the annular support of the present invention holds the peripheral portions of both ends of the annular body formed in a cylindrical shape, and the annular body is centered on the axis of the annular body. while rotating, pressure applied to the shaft direction of the annular body relative to the annular body and the center the annular body of the forming pattern of the forming roll from the cylindrical inner side of said annular body having a shaped pattern on the roll surface the pressed while maintaining the center overlaps the position of the side surface of the side surface of the annular body Rukoto, characterized by having a forming step of forming the annular member by the molding pattern.

  In the manufacturing method of the annular support of the present invention, the plate thickness distribution of the annular body can be formed into a symmetrical shape with the center of the side surface of the annular body as the center, and the desired thickness distribution can be maintained while maintaining the uniform thickness distribution as a whole. An annular support having a molding pattern can be produced.

  Furthermore, in the manufacturing method of the said annular support body, it is preferable to maintain the position where the center of the said shaping | molding pattern overlaps with the center of the side surface of the said annular body by moving the said forming roll to the axial direction of the said annular body. By adopting such a configuration, the center of the molding pattern of the molding roll can be maintained at the position overlapping the center of the side surface of the annular body by utilizing the axial force generated during the molding of the annular body. The arrangement | positioning position of a forming roll can be maintained, without providing an apparatus and control.

  Furthermore, in the manufacturing method of the said annular support body, an axial direction cross section has an annular convex part, and the curvature radius of the said annular convex part of the said forming roll is a desired shaping | molding pattern shape | molded by the said annular support body. It is preferable that it is smaller than the curvature radius of the corresponding part. By adopting such a configuration, even if the shape change due to the spring back of the annular body occurs and the curvature radius of the molding pattern formed on the annular support becomes large, the annular support body having a molding pattern with a desired curvature radius. Can be manufactured.

  Furthermore, in the manufacturing method of the said annular support body, the said shaping | molding pattern of the said forming roll has a smooth part in the peripheral part vicinity of the said forming roll, and the said smooth part becomes small in an outer diameter toward the said peripheral part. It is preferable to be formed so as to be inclined. By adopting such a configuration, even if the shape change due to the spring back of the annular body occurs and the ear portion of the molding pattern formed on the annular support warps outward in the radial direction of the annular support body, the smooth portion of the molding roll Therefore, the annular support having a desired molding pattern can be manufactured by a single molding process. Further, the smooth portion of the molding roll can prevent the side surface of the annular body from being deformed inward in the radial direction, reducing the galling to the mounting portion of the molding apparatus, and easily removing the annular support from the molding apparatus. Can be removed.

The annular support molding apparatus of the present invention has clamps that respectively hold the peripheral portions of both ends of the annular body formed in a cylindrical shape, and rotates the clamp around the axis of the annular body as a central axis. a rotary compressor for applying pressure to the axis direction of the annular body relative to the annular body, the side surface of the time the operation of the rotary compressor, the molding pattern formed on the roll surface from the inside of the annulus annulus The molding roll has a slide mechanism that maintains a position where the center of the molding pattern overlaps the center of the side surface of the annular body.

  With the annular support molding apparatus of the present invention, the plate thickness distribution of the annular body can be formed into a symmetric shape with the center of the side surface of the annular body as the center, and the desired molding is performed while maintaining the uniform plate thickness distribution as a whole. An annular support having a pattern can be produced.

  Furthermore, in the molding apparatus for the annular support, the molding roll may be formed so as to be movable in the axial direction of a roll shaft disposed in parallel with the axial direction of the annular body. You may have the elastic member which produces an elastic force in the axial direction of the said forming roll with respect to the said forming roll. By adopting such a configuration, the center of the molding pattern of the molding roll can be maintained at the position overlapping the center of the side surface of the annular body by utilizing the axial force generated during the molding of the annular body. The arrangement | positioning position of a forming roll can be maintained, without providing an apparatus and control. The initial position of the forming roll can be held by the elastic member, and the forming roll can be prevented from sliding unnecessarily in the axial direction in the initial stage of pressing the forming roll against the annular body. .

  Furthermore, in the said shaping | molding apparatus of a cyclic | annular support body, it is preferable that the said forming roll is formed so that rotation with respect to the center axis | shaft of the said forming roll is possible. By adopting such a configuration, the molding roll in contact with the annular body rotates at the same speed as the annular body, so unnecessary friction in the rotational direction caused by the rotational speed difference between the annular body and the molding roll is reduced. It can be lost.

  Furthermore, in the apparatus for forming an annular support, it is preferable that the clamp has a U-shaped receiving groove that sandwiches the peripheral edge of the annular body. By adopting such a configuration, the holding force generated by the receiving groove and the compressive force generated by the annular body being pushed out in the axial direction while contacting the bottom formed in the U-shaped receiving groove The clamp can securely hold the annular body.

  Furthermore, in the molding apparatus for the annular support, the molding pattern of the molding roll has an annular convex portion having a curved axial cross section, and the radius of curvature of the annular convex portion of the molding roll is equal to the annular support. It is preferable that it is smaller than the radius of curvature of the corresponding part of the desired molding pattern molded into the body. By employ | adopting such a structure, the shaping | molding pattern of a desired curvature radius can be shape | molded on an annular support body using the springback produced after shaping | molding of an annular support body.

  Further, in the molding apparatus for the annular support, the molding pattern of the molding roll has a smooth portion near the peripheral edge of the molding roll, and the outer mold of the clamp facing the outside of the side surface of the annular body is The smoothing part of the forming roll preferably has a smoothing part in contact with the smoothing part via the annular body, and the smoothing part of the forming roll has a smaller outer diameter toward the peripheral part. It is preferable that the smooth part of the outer mold is inclined corresponding to the smooth part of the forming roll.

  By adopting such a configuration, it is possible to simultaneously mold the smooth ears formed on the peripheral edge of the annular support in one molding step. Further, the smooth portion of the molding roll can prevent the side surface of the annular body from being deformed inward in the radial direction, reducing the galling to the mounting portion of the molding apparatus, and easily removing the annular support from the molding apparatus. Can be removed. In addition, since it is not necessary to use the inner mold for forming the ear portion of the annular support, the protruding length of the inner mold can be shortened, and the annular support is unlikely to come off the clamp by the spring back of the annular support. Can be prevented. Further, even if the shape change due to the spring back of the annular body occurs and the ear portion of the molding pattern formed on the annular support warps outward in the radial direction of the annular support body, the slope is formed by the smooth portion of the molding roll. An annular support having a desired molding pattern can be manufactured.

  Furthermore, in the molding apparatus for the annular support, the molding pattern of the molding roll has an annular convex portion having a curved wave shape in an axial section, and faces the outside of the side surface of the annular body. Preferably has a curved portion corresponding to a part of the annular convex portion of the forming roll. By adopting such a configuration, a desired shape can be formed more uniformly and with higher accuracy in the plate thickness of the annular support.

  Further, in the annular support forming apparatus, the inner mold of the clamp facing the inside of the side surface of the annular body is formed when the molding roll comes into contact with the outer mold of the clamp via the annular body. It is preferable that the periphery of the mold is configured not to contact the molding roll.

  By the method and apparatus for manufacturing an annular support of the present invention, the plate thickness distribution of the annular body can be formed into a symmetrical shape with the center of the side surface of the annular body as the center, and the uniform thickness distribution can be maintained as a whole. However, an annular support having a desired molding pattern can be produced. In addition, since the annular support can be formed by a single forming step, the productivity of the annular support and the cost performance of the forming apparatus are improved.

  In addition, since the annular support can be manufactured or molded while taking into account the shape change caused by the springback by the manufacturing method of the annular support and the molding apparatus of the present invention, the effect that the molding accuracy of the annular support is improved. Play.

  The annular support body molding apparatus according to the present invention prevents the annular support body from being squeezed into the receiving groove of the clamp even if the annular support body is caused to spring back, thereby damaging the annular support body and the molding apparatus. There is an effect that this can be prevented.

  Hereinafter, with reference to FIG. 1, an embodiment of the manufacturing method of the annular support 3 and the molding apparatus 1 of the present invention will be described. Here, FIG. 1 shows a cross-sectional view of the forming device 1 of the annular support 3.

  As shown in FIG. 1, a molding apparatus 1 for an annular support 3 according to this embodiment includes a rotary compressor 40 that rotates by holding and rotating peripheral portions 2 a and 2 b of an annular body 2 formed in a cylindrical shape. And a forming roll 10 disposed inside the annular body 2 fixed to the compressor 40.

The annular body 2 is, for example, sheared (sheared) into a shape of a rectangular base material having a size (long side and short side length necessary for the formation of the annular body 2) suitable for the annular body 2. Process), using a cylindrical object such as a urethane roll, bending the rectangular base material obtained by the shearing process into a cylindrical shape along the long side (bending process), using a welding device such as a linear Tig automatic welding device, It forms by welding the both ends (short sides of a rectangular base material) of the non-closed rectangular base material bent in the shape (welding process). As the metal flat plate, a high-tensile metal having a proof stress of 3.4 × 10 ⁸ Pa or more is preferable. For example, high-tensile steel (high-tensile steel) can be used.

  Then, using the molding device 1 of the annular support 3, the peripheral portions 2 a and 2 b at both ends of the annular body 2 are respectively held, and the annular body 2 is rotated while rotating the annular body 2 about the axis of the annular body 2. On the other hand, pressure is applied in the axial compression direction CD of the annular body 2, and the molding roll 10 having the molding pattern 11 is pressed against the side surface 2 c of the annular body 2 from the inside of the annular body 2 to form the molding pattern 4 on the annular body 2. Molding (molding process). In addition, it is more preferable after the shaping | molding process to cut the peripheral part 3a, 3b end surface of the manufactured cyclic | annular support body 3 and to arrange the shape of the said peripheral part 3a, 3b (finishing process).

  The rotary compressor 40 of the molding apparatus 1 includes a clamp 20 and 30 that respectively hold the peripheral portions 2a and 2b at both ends of the annular body 2, and an annular body while rotating the clamps 20 and 30 about the axis of the annular body 2 as a central axis. 2 and a rotary compression mechanism (not shown) that applies pressure in the axial compression direction CD of the annular body 2. The clamps 20 and 30 are preferably formed with U-shaped receiving grooves 21a and 31a that come into contact with the periphery 2a and 2b of the annular body 2 from the inside and outside, respectively. The width of the receiving grooves 21a and 31a is equal to or slightly smaller than the plate thickness of the annular body 2, and at least a part of the peripheral edge portions 2a and 2b of the annular body 2 is fitted into the grooves 21a and 31a. It can be held by. In addition, it is preferable that the receiving grooves 21a and 31a are provided in an annular shape and sandwich all of the peripheral edge portions 2a and 2b of the annular body 2.

  The portions facing the inside of the side surface 2c of the annular body 2 of the clamps 20 and 30 are referred to as inner molds 22 and 32, and the portions facing the outside of the side surface 2c of the annular body 2 are referred to as outer molds 21 and 31. The inner molds 22 and 32 and the outer molds 21 and 31 are formed of different members as shown in FIG. 1, and the receiving grooves 21a and 31a may be formed by combining both members. The grooves 21a and 31a, the inner molds 22 and 32, and the outer molds 21 and 31 may be molded. The shapes of the inner dies 22 and 32 and the outer dies 21 and 31 will be described together with the forming roll 10 described later.

  The rotary compression mechanism of the rotary compressor 40 is formed so that at least one of the clamps 20 and 30 is rotated by a driving means (not shown) with the axis of the annular body 2 as the central axis. In this case, the other clamp may be rotated by driving means (not shown) with the axis of the annular body 2 as a central axis in synchronization with the one clamp, or is configured to be rotatable and transmitted through the annular body 2. You may rotate by rotation by one clamp. The rotary compression mechanism is formed so that pressure can be applied to the axial direction PD of the annular body 2 by moving at least one of the clamps in the axial direction PD of the annular body. In FIG. 1, the clamp 30 is fixed with respect to the axial direction PD of the annular body 2, and the clamp 20 is moved in the axial compression direction CD of the annular body 2. Hereinafter, the clamp in which the movement of the annular body 2 in the axial direction PD is fixed is referred to as a fixed clamp 30, and the clamp that is movable in the axial direction PD of the annular body 2 is referred to as a movable clamp 20.

  The forming roll 10 of the forming apparatus 1 is rotatably provided with an axis parallel to the center axis of the annular body 2 as a center axis, and has a forming pattern 11 on the roll surface. The molding pattern 11 has annular convex portions 11A and 11B having a curved cross section in the axial direction PD. The curvature radius r of the annular projections 11A and 11B of the forming pattern 11 of the forming roll 10 is preferably smaller than the curvature radius R of the desired forming pattern 4 formed on the annular support 3 (see FIG. 4). Moreover, it is preferable that the annular convex portions 11A and 11B are mirror-symmetric with respect to the center 11m in the axial direction PD of the molding pattern 11.

  Further, the molding pattern 11 may have smooth portions 13A and 13B in the vicinity of the peripheral edge portions 14A and 14B of the molding roll 10. The smooth portions 13A and 13B of the forming roll 10 are preferably formed to be inclined so that the outer diameter decreases toward the peripheral portions 14A and 14B of the forming roll 10. The annular convex portions 11A and 11B and the smooth portions 13A and 13B may be smoothly continuous or may have boundaries. Moreover, it is preferable that the shaping | molding pattern 11 as a whole is mirror-symmetrical with respect to the center 11m of the axial direction PD of the shaping | molding pattern 11. FIG.

  In FIG. 1, two annular convex portions 11A, 11B having a smooth curved wave shape and smooth portions 13A, 13B inclined toward the outer side in the axial direction have a molding pattern that is smoothly continuous. Is mirror-symmetric with respect to the center 11 m in the axial direction PD.

  Here, the outer molds 21 and 31 of the clamps 20 and 30 described above are in contact with the smooth portions 13A and 13B of the forming roll 10 via the annular body 2 as shown in FIG. 1 and FIG. It is preferable to have smooth parts 21b and 31b. The smooth portions 21b and 31b of the outer molds 21 and 31 are preferably inclined corresponding to the smooth portions 13A and 13B of the forming roll 10. Furthermore, the outer molds 21 and 31 are curved at a portion corresponding to a part of the annular protrusions 11A and 11B at a part that contacts a part of the curved annular protrusions 11A and 11B of the forming roll 10 via the annular body 2. It is preferable to have the curved portions 21c and 31c.

  Moreover, as shown in FIG.1 and FIG.2 (c), as for the inner mold | types 22 and 32 of the clamps 20 and 30, the forming roll 10 contacted the outer mold | types 21 and 31 of the clamps 20 and 30 via the annular body 2. FIG. At this time, it is preferable that the peripheral portions of the inner dies 22 and 32 are configured not to contact the forming roll 10. However, the inner molds 22 and 32 protrude at least as long as the receiving grooves 21 a and 31 a of the clamps 20 and 30 need to hold the annular body 2. As shown in FIG. 1, since the forming roll 10 has the smooth portions 13A and 13B, the protruding lengths of the inner dies 22 and 32 in the axial direction PD of the annular body 2 are shortened, and the annular body 2 is caused by the spring back. Even if the peripheral portions 2a and 2b of the lens are deformed, removal after molding can be easily performed.

  The forming roll 10 has a slide mechanism that maintains a position where the center 11 m of the forming pattern 11 overlaps the center 2 m of the side surface of the annular body 2. Specifically, the forming roll 10 includes needle bearings 17 </ b> A, 17 </ b> B, and needle bearings 17 </ b> A, 17 </ b> B, and a cylindrical roll shaft 16 disposed in parallel with the axial direction PD of the annular body 2 attached to the clamps 20, 30 of the rotary compressor 40.・ It is attached via The roll shaft 16 has a flange portion 16a at an end portion (left end portion in FIG. 1) on the fixed clamp 30 arrangement side, and the fixed clamp 30 arrangement of the flange portion 16a and the forming roll 10 is provided. 2A, the center 11m of the forming pattern 11 of the forming roll 10 overlaps the center 2m of the side surface of the annular body 2 in the initial state before forming, as shown in FIG. The forming roll 10 is disposed at (initial position). The roll shaft 16 is attached to a hydraulic cylinder 19 that can apply pressure in the radial direction RD of the annular body 2 and moves together with the movable clamp 20 in the axial direction PD of the annular body 2. (However, it does not rotate with the movable clamp 20).

  Further, an elastic member 18 such as a coil spring that generates an elastic force in the axial direction PD of the forming roll 10 with respect to the forming roll 10 is disposed on the movable clamp 20 disposed side on the roll shaft 16. This is to prevent the forming roll 10 from unnecessarily reciprocating in the axial direction PD of the roll shaft 16 by the needle bearings 17A, 17B. In the initial state, the elastic member 18 presses the forming roll 10 against the flange portion 16a and holds it in the initial position, or it unnecessarily shakes in the axial direction PD when the forming roll 10 and the annular body 2 come into contact with each other. Although it has an elastic force to be suppressed, the forming roll 10 does not have an elastic force to prevent the force to move in the axial direction PD as the annular body 2 is formed.

  Next, the molding process of the annular support 3 will be described in detail using the molding apparatus 1 for the annular support 3 formed as described above.

  First, as shown in FIG. 1, one peripheral portion (a left peripheral portion in FIG. 1) 2 a of the annular body 2 obtained through a shearing process, a bending process, and a welding process is used as a receiving groove 31 a of the fixed clamp 30. Plug in. Next, by moving the movable clamp 20 to the fixed clamp 30 side (left side in FIG. 1), the other peripheral portion (right peripheral portion in FIG. 1) 2 b of the annular body 2 is moved to the movable clamp 20. The annular body 2 is fixed to the clamps 20 and 30 by inserting into the receiving grooves 21a.

  When the annular body 2 is fixed, the clamps 20 and 30 are rotated about the axis of the annular body 2 as a central axis, as shown in FIG. Thereafter, as shown in FIG. 2B, thrust toward the fixed clamp 30 is applied to the movable clamp 20 and the roll shaft 16 to advance in the compression direction CD, and the annular body 2 is formed on the forming roll 10 on the roll shaft 16. Apply thrust from inside to outside. At this time, if the thrust of the movable clamp 20 is too strong, the deformation due to the compressive force in the axial direction becomes stronger than the deformation of the annular body 2 due to the forming pattern 11 of the forming roll 10, and the forming accuracy may not be maintained. Moreover, if the thrust of the forming roll 10 is too strong, the plate thickness of the annular body 2 at the portion where the forming roll 10 is strongly pressed (for example, the vertices 11At and 11Bt of the annular convex portions 11A and 11B) becomes thin. Therefore, it is preferable that the conditions of the thrust of the movable clamp 20 and the thrust of the forming roll 10 are determined and molding is performed with an appropriate thrust.

  The forming roll 10 may be brought into contact with the annular body 2 after the annular body 2 is rotated. However, in order to reduce wear of the forming roll 10, the forming roll 10 is in contact with the annular body 2 in advance. The annular body 2 may be rotated. In FIG. 1, the rotating roll 10 is not particularly provided with a driving means, and is configured to rotate by frictional force with the annular body 2. However, in order to reduce wear of the forming roll 10, the rotation of the annular body 2 is performed. The forming roll 10 can also be rotated by a driving means according to the above.

  Here, the forming roll 10 is interposed between the forming roll 10 and the roll shaft 16 because a force to move in the axial direction PD together with the annular body 2 is applied by meshing with the molding pattern 4 ′ of the annular body 2 in the middle of molding. The needle bearings 17A, 17B... Are pressed against the annular body 2 while moving in the direction of the fixed clamp 30 (compression direction CD). For example, as shown in FIG. 2 (b), when the movable clamp 20 and the roll shaft 16 advance by 2 L in the direction of the fixed clamp 30 (compression direction CD), the center 11 m of the annular body 2 becomes L in the direction of the fixed clamp 30. Proceed by (half the amount of movement of the movable clamp 20). From the viewpoint of the movable clamp 20, the forming roll 10 is relatively retracted by L toward the movable clamp 20 (in the direction opposite to the compression direction CD, rightward in FIG. 2).

  Further, as shown in FIG. 2A, the forming roll 10 is disposed at a position where the center 11 m of the forming pattern 11 of the forming roll 10 overlaps the center 2 m of the side surface 2 c of the annular body 2 as an initial position. . 2B and 2C, even if the forming roll 10 moves in the radial direction RD, the center 11m of the forming pattern 11 is the same as the center 2m of the side surface 2c of the annular body 2. It is arranged at the overlapping position. That is, the forming roll 10 is formed into the annular body 2 while maintaining the position where the center 11m overlaps the center 2m of the side surface 2c of the annular body 2 by the initial position arrangement and the subsequent movement of the forming roll 10 in the axial direction PD. Pattern 4 ′ is formed.

  By this series of operations, a molding pattern 4 ′ is molded on the side surface 2 c of the annular body 2 as shown in FIG. If the molding pattern 11 of the molding roll 10 includes the annular convex portions 11A and 11B and the smooth portions 13A and 13B, the annular convex portion 4a of the annular support 3 is formed by a single molding step without going through a plurality of molding steps. 4b and the ears 6A and 6B can be formed.

  Next, the manufacturing method of the annular support 3 and the operation of the molding apparatus 1 according to the present embodiment will be described with reference to FIGS.

  As shown in FIG. 2, the manufacturing method of the annular support 3 and the molding apparatus 1 of the present embodiment compress the rotating annular body 2 in the axial direction PD, and form the molding roll 10 into the molding roll 10. Since the molding is performed while the center 11m of the pattern 11 is always kept at the position where it overlaps the center 2m of the side surface of the annular body 2, the shapes on both sides are formed symmetrically across the center 2m of the annular body 2. And the whole annular body 2 is deform | transformed substantially uniformly, without plate | board thickness distribution being biased to a certain part extremely. In the case of the shape shown in FIG. 2, the plate thickness distribution of the annular convex portion 4a and the plate thickness distribution of the annular convex portion 4b are uniform, and the molding pattern 4 having a desired shape can be molded. This is because the plate of the annular body 2 is used for the production and molding of the annular support 3 using a high-tensile metal having a fracture strain of about 17% instead of SS steel (general structural rolled steel) having a fracture strain of about 42%. A substantially uniform thickness distribution is a very advantageous effect. This is because, in the case of a high-strength metal, if the plate thickness distribution becomes non-uniform, the possibility of breaking during the molding increases.

  Actually, when the plate thickness distribution after molding is measured, the annular support manufactured by the manufacturing apparatus and the manufacturing method of the present invention is the first even if it is the apex of the annular protrusions 4A, 4B where the plate thickness is the thinnest. It was about 87% of the plate thickness, and it was about 105% even at the valley portion between the annular convex portions 4A and 4B where the plate thickness was the thickest. For this reason, the plate | board thickness distribution of a cyclic | annular support body exists in the range of 87%-105% of the original plate | board thickness as a whole, and is a substantially uniform thing.

  Since the molding roll 10 used for this molding is formed so as to be movable on the roll shaft 16 using the needle bearings 17A, 17B..., The annular body 2 (FIG. The center 11m of the forming pattern 11 of the forming roll 10 can be kept at the position overlapping the center 2m of the side surface of the annular body 2 while utilizing the force in the axial direction PD generated by meshing with b). In addition, the initial position of the forming roll 10 that can move in the axial direction PD is determined by the elastic member 18 provided on the right side of the forming roll 10 (on the side where the movable clamp 20 is provided). Thereby, the arrangement positions of the forming rolls 10 can be kept at the positions where the centers 2 m and 11 m overlap without using a complicated position control device that requires advanced position control. Further, the needle bearings 17A, 17B,... Enable the forming roll 10 to rotate on the roll shaft 16, so that even if the forming roll 10 is pressed against the rotating annular body 2, the forming roll 10 rotates. The friction generated between the annular body 2 and the forming roll 10 can be reduced.

  Further, as the forming pattern 11 of the forming roll 10, there are annular convex portions 11 </ b> A and 11 </ b> B and smooth portions 13 </ b> A and 13 </ b> B, and the outer molds 21 and 31 correspond to the forming roll 10 and the curved portions 21 c and 31 c and smooth portions 21 b and 31 b. The annular convex portions 4a and 4b and the ear portions 6A and 6B of the annular support 3 can be molded in only one molding step. In addition, as shown in FIG. 2, it contacts the inner side of the side surface 2c of the cyclic | annular body 2 in order from the vertex 11At and 11Bt of the cyclic | annular convex parts 11A and 11B of the forming roll 10. As shown in FIG.

  Here, when the curvature radius r in the annular convex portions 11A and 11B of the molding pattern 11 of the molding roll 10 is smaller than the curvature radius R of the desired molding pattern 4 molded on the annular support 3, the entire molding roll 10 is obtained. The curvature radius r of the molding pattern 4 ′ of the annular support 3 ′ in the pressed state is smaller than the curvature radius R of the desired molding pattern 4 molded on the annular support 3. This is because by removing the thrust in the radial direction RD of the forming roll 10, as shown in FIG. 3, the annular support 3 ′ immediately after forming causes a spring back in the direction of the arrow in FIG. 3, and as shown in FIG. This is because the curvature radius r changes to a shape that expands to the desired curvature radius R. That is, even if the curvature radius r of the molding pattern 4 ′ of the annular support 3 ′ immediately after molding is increased by the spring back, the molding pattern having a desired curvature radius R is formed because the spring back is assumed in advance. An annular support 3 having 4 can be produced or molded.

  Further, when the smooth portions 13A and 13B of the forming roll 10 are formed to be inclined so that the outer diameter decreases toward the peripheral portions 14A and 14B of the forming roll 10, the entire forming roll 10 is pressed. The ear portions 6A and 6B of the annular support 3 'are inclined so that the diameter decreases toward the peripheral portions 3a and 3b. As a result, as shown in FIG. 3, the annular support 3 ′ immediately after molding has a shape change or ear portion 6A in which the diameter of the curved portions 5A and 5B outside the annular convex portions 4a and 4b is reduced by the spring back. 4B, even if a shape change occurs in which the annular support warps outward in the radial direction, the annular support 3 having the ears 6A and 6B having a desired inclination (for example, horizontal as shown in FIG. 4) is formed as shown in FIG. Can be manufactured or molded.

  Further, the smooth portions 13A and 13B of the molding roll 10 can prevent the side surface of the annular body 2 from being deformed inward in the radial direction at the ends of the annular convex portions 4a and 4b. It is possible to reduce the galling to 20, 30 and to easily remove the annular support 3 ′ from the molding apparatus 1. Further, as shown in FIG. 2 (c), if the protruding lengths of the inner dies 22, 32 are short and the receiving grooves 21a, 31a are shallow, the force applied to the inner dies 22, 32 is reduced, so that the molding is performed. It is possible to further prevent the annular support 3 ′ from being squeezed and difficult to come off from the clamps 20, 30. In addition, if the structure which hold | maintains the annular body 2 only by the outer mold | types 21 and 31 as the clamps 20 and 30 without providing the inner mold | types 22 and 32, it will become easier to remove the annular support body 3 '.

  Further, as shown in FIGS. 1 and 2, the clamps 20 and 30 of the molding device 1 for the annular support 3 have U-shaped receiving grooves 21a and 31a. 32 and the outer molds 21 and 31, the fixed clamp 30 and the movable clamp 20 are pivoted by the contact between the bottom formed in the U-shaped receiving grooves 21 a and 31 a and the annular body 2. The annular body 2 can be sandwiched in the direction PD. That is, the annular body 2 can be securely held using the holding force of the inner dies 22 and 32 and the outer dies 21 and 31 and the compressive force of the clamps 20 and 30.

  The outer molds 21 and 31 of the clamps 20 and 30 are curved portions 21c and 31c and smooth portions 21b that contact a part of the annular convex portions 11A and 11B of the forming roll 10 and the smooth portions 13A and 13B via the annular body 2. , 31b, and the inner dies 22 and 32 are annular by a length that does not contact the forming roll 10 when the forming roll 10 contacts the outer dies 21 and 31 via the annular body 2. Projecting inward in the axial direction PD of the body 2. Thus, the molding pattern 4 having the annular convex portions 4a and 4b and the ear portions 6A and 6B of the annular support 3 can be molded by only one molding step without going through a plurality of molding steps. In particular, since the outer molds 21 and 31 have the curved portions 21c and 31c and the smooth portions 21b and 31b, the stress strain of the boundary portions 5A and 5B between the annular convex portions 4a and 4b and the ear portions 6A and 6B can be reduced. Can be relaxed. In addition, since at least a part of the ears 6A and 6B of the annular support 3 is formed by the molding roll 10 and the outer molds 21 and 31, the inner mold 22 is used for molding the ears 6A and 6B of the annular support 3. , 32 may not be used much. As a result, as described above, since the protruding length of the inner dies 22 and 32 in the axial direction PD can be shortened, it is possible to prevent the clamps 20 and 30 from being squeezed, and the annular support after molding 3 can be easily removed.

  As described above, the plate thickness distribution of the annular body 2 can be shaped symmetrically about the center of the side surface of the annular body by the method for manufacturing the annular support 3 and the molding apparatus 1 of the present embodiment. As described above, an annular support having a desired molding pattern can be manufactured while maintaining a uniform thickness distribution. In addition, since it is possible to simultaneously mold all the portions of the annular support 3 with only one molding process, the productivity of the annular support 3 and the cost performance of the molding apparatus 1 are improved.

  In addition, since the annular support 3 can be manufactured or molded by taking into account the shape change due to the springback by the manufacturing method of the annular support 3 and the molding apparatus 1 of the present embodiment, the molding accuracy of the annular support 3 is improved. Has the effect of improving.

  And in the shaping | molding apparatus 1 of the cyclic | annular support body 3 of this embodiment, since the cyclic | annular support body 3 is hard to bite to the receiving grooves 21a and 31a of the clamps 20 and 30, it damages the cyclic | annular support body 3 and its shaping | molding apparatus 1. It is possible to prevent this, and the productivity can be improved.

  In addition, this invention is not limited to embodiment mentioned above etc., A various change is possible as needed.

  For example, in the molding apparatus 1 of this embodiment, the center 11m of the molding pattern 11 of the molding roll 10 is positioned so as to overlap the center 2m of the side surface 2c of the annular body 2, so that the molding roll 10 can be moved on the roll shaft 16. However, in another embodiment, the slide mechanism is configured using a control means for controlling the central positions 2m and 11m, for example, a hydraulic cylinder having a microcomputer or the like. It may be.

  In the molding apparatus 1 of the present embodiment, one of the clamps 20 and 30 is fixed and the other is moved together with the roll shaft 16 of the molding roll 10. However, in another embodiment, the molding roll 10 is moved. The arrangement position of the molding roll 10 is fixed at a position where the center 11m of the molding pattern 11 of the molding roll 10 overlaps the center 2m of the side surface 2c of the annular body 2 in the radial direction RD of the annular body 2, and the axial direction PD of the annular body 2 is reached. Both the clamps 20 and 30 disposed on both sides are compressed (in the case of FIG. 1, the right clamp 20 is movable from right to left and the left clamp 30 is movable from left to right). The molding pattern 4 may be formed on the annular body 2 by moving the ring body 2 toward the center.

The partial axial sectional view which shows one Embodiment in the shaping | molding apparatus of the annular support body of this invention (A) at the start of molding of the annular body, (b) during the molding of the annular body, (c) an axis of one embodiment of the molding process in the method for producing the annular support of the present invention immediately before the completion of the molding of the annular body. Partial cross-sectional view The fragmentary sectional view which shows immediately after shaping | molding of the cyclic | annular support body manufactured or shape | molded with the manufacturing method and shaping | molding apparatus of this invention The fragmentary sectional view which shows the after-molding of the cyclic | annular support body manufactured or shape | molded with the manufacturing method and shaping | molding apparatus of this invention Partial sectional view showing the configuration of the run-flat system (A) And (b) is sectional drawing which shows the 1st shaping | molding process in the manufacturing method of the conventional annular support body, and its shaping | molding apparatus. (A) And (b) is sectional drawing which shows the 2nd shaping | molding process in the manufacturing method of the conventional annular support body, and its shaping | molding apparatus. (A) is whole sectional drawing which shows the cyclic | annular support body shape | molded by the conventional manufacturing method and shaping | molding apparatus, (b) is the fragmentary sectional view which expanded the elliptical enclosure part of Fig.8 (a), (c) is a broken state Partial sectional view showing

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Molding apparatus 2 Ring body 2a, 2b Ring body peripheral part 2c Ring body side surface 2m Ring body side surface center 3 Ring support body 4 Ring support molding pattern 10 Molding roll 11 Molding roll molding pattern 11A, 11B Molding Annular convex part of roll 11m Center of forming pattern 13A, 13B Smoothing part of forming roll 14A, 14B Peripheral part of forming roll 16 Roll shaft 17A, 17B ... Needle bearing 18 Elastic member 20, 30 Clamp 21, 31 Outer mold 21a , 31a Receiving groove 21b, 31b Outer mold smoothing part 21c, 31c Outer mold bending part 22, 32 Inner mold 40

Claims (16)

  While holding the peripheral edge portions of both ends of the annular body formed in a cylindrical shape and rotating the annular body around the axis of the annular body, pressure is applied to the annular body in the axial direction of the annular body. In addition, by pressing a molding roll having a molding pattern on the roll surface against the side surface of the annular body while maintaining the position where the center of the molding pattern overlaps the center of the side surface of the annular body from the inside of the cylinder of the annular body A method for producing an annular support, comprising a molding step of molding the annular body by the molding pattern. The annular support body according to claim 1, wherein the molding roll is moved in the axial direction of the annular body to maintain a position where the center of the molding pattern overlaps with the center of the side surface of the annular body. Method.

  The forming pattern of the forming roll has an annular convex portion having a curved axial cross section, and the radius of curvature of the annular convex portion of the forming roll corresponds to a desired forming pattern formed on the annular support. The method of manufacturing an annular support according to claim 1 or 2, wherein the radius of curvature is smaller than a radius of curvature of a portion to be formed.   The forming pattern of the forming roll has a smooth portion in the vicinity of the peripheral portion of the forming roll, and the smooth portion is formed to be inclined so that the outer diameter decreases toward the peripheral portion. The manufacturing method of the cyclic | annular support body of any one of Claim 1 to 3 characterized by the above-mentioned. The method for manufacturing an annular support according to any one of claims 1 to 4, wherein a high-strength metal is used as the annular body, and the annular support is used in a core-type run flat system. The clamp has clamps for holding the peripheral edge portions of both ends of the annular body formed in a cylindrical shape, and the clamp is rotated about the axis of the annular body in the axial direction of the annular body with respect to the annular body. A rotary compressor that applies pressure;
A molding roll that presses the molding pattern formed on the roll surface against the side surface of the annular body from the inside of the annular body during operation of the rotary compressor;
The forming roll has a slide mechanism for maintaining a position where the center of the forming pattern overlaps the center of the side surface of the annular body. The said forming roll is formed so that a movement in the axial direction of the roll axis | shaft arrange | positioned in parallel with the axial direction of the said annular body is possible, The shaping | molding apparatus of the annular support body of Claim 6 characterized by the above-mentioned. The said roll axis | shaft has the elastic member which produces an elastic force in the axial direction of the said forming roll with respect to the said forming roll, The shaping | molding apparatus of the cyclic | annular support body of Claim 7 characterized by the above-mentioned. The forming roll is forming apparatus of the annular support body according to any one of claims 6 to 8, characterized in that is rotatably formed relative to the center axis of the forming roll. The clamp, the molding apparatus of the annular support according to any one of claims 6 9, characterized in that it has a shaped receiving groove cross-section co sandwiching the peripheral edge of said annular body . The forming pattern of the forming roll has an annular convex portion having a curved axial cross section, and the radius of curvature of the annular convex portion of the forming roll corresponds to a desired forming pattern formed on the annular support. The apparatus for forming an annular support according to any one of claims 6 to 10 , wherein the radius of curvature is smaller than a radius of curvature of a portion to be formed. The molding pattern of the molding roll has a smooth portion in the vicinity of the peripheral edge of the molding roll,
Outer mold of the clamp facing the outer side surface of the annular body, the claim 6, characterized in that it has a smooth portion at a portion which contacts through the annular body to the smooth portion of the forming roll 11. The apparatus for forming an annular support according to any one of 11 above. The smooth portion of the forming roll is formed to be inclined so that the outer diameter decreases toward the peripheral portion,
The apparatus for molding an annular support according to claim 12 , wherein the smooth portion of the outer mold is inclined corresponding to the smooth portion of the forming roll. The molding pattern of the molding roll has an annular convex part whose axial cross section has a curved wave shape,
Outer mold of the clamp facing the outer side surface of the annular body, one of claims 6 13, characterized in that has a curved portion corresponding to a portion of the annular convex portion of the forming roll An apparatus for forming an annular support according to claim 1. The inner mold of the clamp facing the inner side of the side surface of the annular body is such that when the molding roll contacts the outer mold of the clamp via the annular body, the peripheral edge of the inner mold does not contact the molding roll. It is comprised as follows. The shaping | molding apparatus of the cyclic | annular support body of any one of Claim 6 to 14 characterized by the above-mentioned. The apparatus for molding an annular support according to any one of claims 6 to 15, wherein a high-strength metal is used as the annular body, and the annular support is used in a core type run flat system.

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