JP2010099729A - Sequential forming apparatus and its method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sequential forming apparatus that improves productivity of forming components by enhancing freedom of movement of a forming roller, and also to provide its method. <P>SOLUTION: In the sequential forming apparatus 1, a component 2 to be formed is plastically deformed by a forming roller 5 to sequentially form a component of a rotation symmetry shape. The forming roller 5 includes a roller part 50 with a circular arc forming face 50a formed by which the component 2 to be formed is pressurized and a shaft part 51 on which the roller part 50 is rotatably supported axially. With the component 2 to be formed pressurized by the forming face 50a of the roller part 50, while the relative angle of the rotary axis S2 of the roller part 50 is varied against the rotary axis S1 of the component 2 to be formed, the roller part 50 is moved in the axial direction of the rotary axis S1 of the component 2 to be formed. Thus, the state of pressurized contact of the forming face 50a of the roller part 50 is varied for the component 2 to be formed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a sequential molding apparatus and method, and more particularly, to a sequential molding apparatus and method for sequentially molding a rotationally symmetric shaped molded part by plastically deforming a molded part by a molding roller.

  2. Description of the Related Art Conventionally, a configuration of a sequential molding apparatus that sequentially molds a rotationally symmetric shaped molded part by plastically deforming a molded member made of iron or light metal is known. Such a sequential forming apparatus has, for example, a flange part that is rotationally symmetric about a rotation axis (center axis) as an automobile part, such as a continuously variable transmission pulley, and that extends in the radial direction and the axial direction. Shaped molded parts are molded.

  The outline of the apparatus configuration is exemplified by an apparatus for manufacturing a continuously variable transmission pulley as a molded part. For example, as disclosed in Patent Document 1 or Patent Document 2, a molded part is usually supported rotatably. There is known a configuration of a rotary sequential molding apparatus provided with a molding die and a molding roller or the like that is rotated relative to the molding component in a state where the molding component supported by the molding die is pressed. In such a sequential molding apparatus, the molded part is plastically deformed by being rotated in a state in which the molded part is pressed against the molding roller, and a molded part having a flange portion extending in the radial direction and the axial direction is molded. The

In addition, regarding a technique for sequentially forming a rotationally symmetric shaped molded part, a configuration of a swing forging device that forms a molded part of a predetermined shape by repeating local plastic deformation is known. As a configuration of a molding apparatus using such swing forging technology, for example, as disclosed in Patent Document 3 and Patent Document 4, an upper mold having a predetermined angle swings in a predetermined direction ( By being (three-dimensionally rotated), the part to be molded is formed gradually.
Japanese Patent Application Laid-Open No. 2006-218496 JP 2005-211902 A JP-A-2-217656 JP 61-242738 A

  However, in the configuration of the conventional rotary sequential forming apparatus described above, the relative angle of the forming roller with respect to the rotating shaft of the part to be molded cannot be changed, and the degree of freedom of movement of the forming roller is low. For this reason, the molding load can be applied only to one part from the molded part, the material flow control ability is low, and the final shape of the molded part that can be molded is limited. Further, due to the low degree of freedom of movement of the forming roller, there has been a problem that buckling, strain, and the like tend to occur beyond the forming limit of the part to be formed during forming.

  In particular, in the conventional rotary sequential forming apparatus, the cylindrical roller portion of the forming roller is usually configured to be in line contact with the part to be molded, so that the contact area between the part to be molded and the forming roller is large. A large molding load was applied to the molding roller during molding. For this reason, the molding roller has a problem that the molding load at the time of molding is restricted due to the resistance to the bending load at the shaft portion, and as a result, the productivity of the molded part is limited.

  From this point of view, in the configuration of the conventional swing forging device described above, the upper mold having the molding surface is swingable with respect to the part to be molded. high. However, in such a configuration, since the part to be molded and the molding surface of the upper mold are in line contact with each other, the contact area between the molded part and the molding roller increases, and a large molding load is applied to the upper mold during molding. This problem has not been solved.

  Accordingly, the present invention relates to a sequential molding apparatus and method therefor, which solves the above-mentioned conventional problems, and increases the degree of freedom of movement of the molding roller and improves the productivity of molded parts. And an object thereof.

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

  That is, according to the first aspect of the present invention, in the sequential molding apparatus that sequentially molds the rotationally symmetric shaped molded part by plastically deforming the molded part by the molding roller, the molding roller has an arc shape in which the molded part is press-contacted. A molded part, and a molded part in a state where the molded part is pressed against the molded surface of the roller part. While the relative angle of the rotation axis of the roller part with respect to the rotation axis is changed, the roller part is moved in the axial direction of the rotation axis of the part to be molded, and the pressure contact state of the molding surface of the roller part against the part to be molded Is something that changes.

  According to a second aspect of the present invention, the forming roller includes a swinging shaft portion that is disposed at an intersection position between the rotating shaft of the molded part and the rotating shaft of the roller portion, and that supports one end of the roller portion. Thus, the other end of the roller portion can be swung in the axial direction of the rotating shaft of the molded part with the swinging shaft portion as a swing center.

  According to a third aspect of the present invention, the forming roller is configured such that the swing shaft portion is linearly movable along the axial direction of the rotation shaft of the part to be molded.

  5. The sequential molding method according to claim 4, wherein the part to be molded is plastically deformed by a molding roller to sequentially form a rotationally symmetrical shaped part. The forming roller is formed in an arc shape in which the part to be molded is pressed. A roller part having a surface formed thereon and a shaft part on which the roller part is rotatably supported. When molding, the part to be molded is pressed against the molding surface of the roller part. While changing the relative angle of the rotation axis of the roller part to the rotation axis of the part, the roller part is moved in the axial direction of the rotation axis of the part to be molded, so that the forming surface of the roller part is pressed against the part to be molded. It changes the state.

  According to a fifth aspect of the present invention, the forming roller includes a swing shaft portion that is disposed at an intersection position between the rotation shaft of the molding target part and the rotation shaft of the roller portion, and that supports one end of the roller portion. Thus, at the time of molding, the other end of the roller portion is swung in the axial direction of the rotation shaft of the part to be molded, with the rocking shaft portion as the rocking center.

  According to a sixth aspect of the present invention, the molding roller linearly moves the oscillating shaft portion along the axial direction of the rotation shaft of the molded part during molding.

  Since it is set as the structure shown to this invention, the freedom degree of a motion of a forming roller can be raised and the productivity of a molded part can be improved.

Next, the best mode for carrying out the invention will be described.
1 is a side sectional view schematically showing the overall configuration of a sequential molding apparatus according to an embodiment of the present invention, FIG. 2 is a side sectional view of a molded part and a molded part, and FIG. 3 is a roller in a molding roller. FIG. 4 is a side view showing a step of a sequential molding method using a sequential molding apparatus, and FIG. 5 is a side sectional view showing a molded part of another embodiment. .
In the following examples, the vertical direction in FIG. 1 is the vertical direction of the sequential molding apparatus 1.

First, the overall configuration of the sequential molding apparatus 1 of the present embodiment will be outlined below.
As shown in FIGS. 1 and 2, the sequential molding apparatus 1 of this embodiment is an apparatus that sequentially molds a rotationally symmetric shaped molded part 3 by plastically deforming a molded part 2 by a molding roller 5. Specifically, the molded part 4 is in a state where the molded part 4 that is supported so as to be rotatable about the rotation axis S1 and the molded part 2 attached to the molded mold 4 are in pressure contact with each other. 2 and a molding roller 5 and the like which are rotated relative to each other, and the molded part 2 is plastically deformed by rotating in a state where the molded part 2 is pressed against the molding roller 5, and a predetermined molded part 3 is Molded.

  As shown in FIG. 2A, the molded part 2 used in this embodiment is a substantially cylindrical member, and the through hole 2a is formed along the axial direction of the rotation axis S1 (center axis). It is installed. The molded part 2 has a rotationally symmetric shape around the rotation axis S1 (center axis), and is plastically deformed by the sequential molding apparatus 1 so that the flange as an extending portion 3b that expands in the radial direction and the axial direction. A molded part 3 having a portion is molded.

  As shown in FIG. 2B, the molded part 3 has a rotationally symmetric shape around the rotation axis S1 (center axis), like the molded part 2, and the flange part as the extending part 3b A flange surface (conical surface) is formed outward in the radial direction. In addition, the molded part 3 is provided with a through hole 3a along the axial direction in the same manner as the molded part 2 described above. For example, the molded part 3 of this embodiment is molded into a pulley for a continuously variable transmission as a final product.

  The molding die 4 is configured such that the molded part 2 is rotatably supported by the molding roller 5. The molding die 4 of the present embodiment employs a known technique, and includes a mandrel (not shown) as a shaft end holding die for the molded part 2, a die 40 disposed around the mandrel, and the like. Is provided. In the case of such a configuration, the part 2 to be molded and the mandrel are integrated by rotating the mandrel around the rotation axis S1 of the part 2 while the one end of the part 2 is held by the mandrel. Is rotationally driven.

  The die 40 has a horizontal surface 40a formed on the side facing the molding roller 5 described later, and the molded part 2 is rolled by the horizontal surface 40a and the molding roller 5 (the molding surface 50a of the roller portion 50). Thus, the flange portion as the extending portion 3b in the molded part 3 is formed (see FIG. 4 and the like). In the molding die 4, a die 40 is integrally rotated with respect to a mandrel that can be driven to rotate about the rotation axis S1.

Next, the configuration of the forming roller 5 will be described in detail below.
As shown in FIGS. 1 and 3, in the sequential molding apparatus 1 of the present embodiment, in the molding roller 5, the roller portion 50 is swingable in the vertical direction and movable in the vertical direction. The degree of freedom of movement is high. Specifically, a roller part 50 having a convex arc-shaped molding surface 50a formed on the outside to which the part 2 to be molded is pressed, a shaft part 51 on which the roller part 50 is rotatably supported, and a molding target The rotating shaft S1 of the component 2 and the rotating shaft S2 of the roller portion 50 are arranged at the intersection position, and one end of the roller portion 50 is constituted by a swinging shaft portion 52 and the like supported via the shaft portion 51. .

  The molding roller 5 is disposed on the axis of the rotation axis S <b> 1 of the workpiece 2 supported by the molding die 4 and above the molding die 4. At the time of molding, only the part 2 to be molded is rotationally driven by the molding die 4 with respect to the molding roller 5 in a state where the part 2 to be molded is pressed against the roller portion 50 (formation surface 50a thereof). The five roller portions 50 are rotated together (see FIG. 4).

  Further, the molding roller 5 is configured to be linearly movable in the vertical direction along the axial center direction of the rotation axis S1 of the molded part 2, and at the time of molding, from the upper position of the molding die 4 to the molded part 2 It is moved down in the approaching direction. The forming roller 5 is configured by integrally assembling a roller portion 50, a shaft portion 51, and a swing shaft portion 52 to a frame body (not shown), and the forming roller 5 is an axis of the rotation axis S1 of the part 2 to be formed. By moving along the center direction (vertical direction), the roller unit 50 is moved in the vertical direction in the axial direction of the rotation axis S1 of the molded part 2.

  For example, in the side view shown in FIG. 1, the roller portion 50 has a substantially elliptical shape with the direction of the rotation axis S2 as the major axis direction, and is formed so that the inner diameter gradually decreases from the center toward both ends. Is formed with an arc-shaped molding surface 50a. In addition, the roller portion 50 is formed in a circular cross section when viewed from the front or the back (when viewed from the left or right in FIG. 1).

  A through hole (not shown) is formed in the roller portion 50 along the axial direction. By inserting the shaft portion 51 into the through hole, the roller portion 50 is rotatable about the rotation shaft S2 to the shaft portion 51. Is pivotally supported. In addition, the molding part 2 is pressed against the molding part 2 during molding, and the molding part 2 is plastically deformed.

  The roller portion 50 is disposed so as to protrude radially about the rotation axis S1 of the molded part 2, and in a state where the molded part 2 is supported by the molding die 4, the roller part 50 is disposed. It arrange | positions so that the molding surface 50a may oppose the molded component 2. FIG. At the time of molding, the molding surface 50a of the roller portion 50 is pressed against the part 2 to be molded, and the molding surface 50a formed in an arc shape is pressed against the part 2 to be molded by point contact.

  The shaft portion 51 is formed of a single rod-shaped member having a circular cross section, and is inserted into a through hole (not shown) of the roller portion 50. The shaft portion 51 of this embodiment has one end supported by the swing shaft portion 52 and the other end supported so as to be swingable in the axial direction (vertical direction) of the rotation shaft S1 of the molded part 2. ing. That is, one end of the roller portion 50 of the present embodiment is supported by the swing shaft portion 52 via the shaft portion 51 so as to be swingable, and the other end of the roller portion 50 serves as a free end to rotate the molded part 2. It can swing in the axial direction of the shaft S1.

  The swing shaft portion 52 is disposed on the axis of the rotation axis S1 of the molded part 2 and at the intersection of the rotation axis S1 of the molded part 2 and the rotation axis S2 of the roller unit 50. In this embodiment, the oscillating shaft portion 52 is fixed to a frame portion on the apparatus main body side (not shown) so that the rotation axis S3 is orthogonal to the axial direction of the rotation shaft S1 of the molded part 2. It is arranged. In other words, the forming roller 5 of the present embodiment has the roller portion 50 (the swing shaft portion 52) and the swing shaft portion so that the rotation shaft S2 of the roller portion 50 is orthogonal to the rotation shaft S3 of the swing shaft portion 52. 52 is supported. Therefore, the roller part 50 is configured such that the other end can swing in the axial direction of the rotation axis S1 of the molded part 2 with the intersection of the rotation shafts S1, S2, and S3 as a swing center.

  The relative position between the roller part 50 and the swinging shaft part 52 is arranged at a position that does not hinder the rotation of the roller part 50 supported by the shaft part 51 and the swinging of the roller part 50 (shaft part 51). Is done.

  Thus, in the forming roller 5, the roller portion 50 swings in the axial direction of the rotation shaft S1 of the molded part 2 with the intersection (the swing shaft portion 52) of the rotation shafts S1, S2, and S3 as the swing center. As a result, the relative angle θ of the rotation axis S2 of the roller unit 50 with respect to the rotation axis S1 of the molded part 2 is configured to be changeable. Here, “the relative angle θ of the rotation axis S2 of the roller unit 50 with respect to the rotation axis S1 of the molded part 2” refers to an angle formed by the rotation axis S2 with respect to the rotation axis S1.

  For example, as shown in FIG. 3, a state in which the rotation axis S1 and the rotation axis S2 are orthogonal to each other is defined as a state where the roller unit 50 is at the reference position, and an angle formed between the rotation axis S1 and the rotation axis S2 in this state is a relative angle. It is assumed that θ (FIG. 3A). In this state, the roller portion 50 protrudes along the radial direction around the rotation axis S1 of the part 2 to be molded. Then, when the roller unit 50 is rotated upward from the state where the roller unit 50 is in the reference position and stopped at a position where the other end is obliquely upward (upward position), the rotation axis S2 with respect to the rotation axis S1. The relative angle is θ + α (FIG. 3B). On the other hand, in a state in which the roller unit 50 is rotated downward from the state where the rotation shaft S2 is at the reference position and stopped at a position where the other end is obliquely downward (downward position), the rotation shaft S2 with respect to the rotation shaft S1. The relative angle is θ−α (FIG. 3C).

  Further, the forming roller 5 is moved in the axial direction of the rotation axis S1 of the part 2 to be molded, so that the swing shaft portion 52 is along the axial direction of the rotation axis S1 of the part 2 to be molded. Is moved in a straight line. That is, as described above, since the roller portion 50, the shaft portion 51, and the swing shaft portion 52 are integrally assembled in the forming roller 5, the swing shaft portion 52 is the rotation shaft S1 of the molded part 2 to be molded. By being linearly moved along the axial direction, the roller unit 50 is also linearly moved in the axial direction of the rotation axis S1 of the molded part 2 in conjunction therewith.

  In the molding roller 5 of the present embodiment, at the time of molding, the molding roller 5 and the molded part 2 are relatively rotated in a state where the molded part 2 is pressed against the molding surface 50 a of the roller part 50, and the molding of the roller part 50 is performed. The roller unit 50 is rotated by the frictional force generated between the surface 50a and the molded part 2. At that time, while changing the relative angle θ of the rotation axis S2 of the roller part 50 with respect to the rotation axis S1 of the part 2 to be molded, the roller part 50 is moved in the axial direction of the rotation axis S1 of the part 2 to be molded. The pressure contact state of the molding surface 50a of the roller portion 50 against the molded part 2 is changed (see FIG. 4).

  Then, the part 2 to be molded is gradually plastically deformed along the shape of the molding surface 50a of the roller part 50 and the horizontal surface 40a of the die 40 on the molding roller 5, and as a final product, a flange part as an extension part 3b. Is formed.

Next, the sequential molding method using the sequential molding apparatus 1 of the present embodiment will be described in detail below with reference to FIG.
First, when molding the molded part 3 using the sequential molding apparatus 1, the molded part 2 is supported at a predetermined position of the molding die 4. In the present embodiment, the molded part 2 is attached to a mandrel (not shown) of the molding die 4. At this time, the molded part 2 is supported in a state of being positioned in the vertical direction by the mandrel. In the sequential molding apparatus 1, the mandrel (not shown) of the molding die 4 is rotationally driven in a predetermined direction with the rotation axis S1 as the center of rotation, whereby the part 2 to be molded is rotated integrally with the mandrel.

  At this time, in the molding die 4, the die 40 is rotationally driven integrally with the mandrel, and in the molding roller 5, the swing shaft portion 52 is positioned on the axis of the rotational axis S <b> 1 of the molded part 2. The roller unit 50 is positioned at the reference position (relative angle θ) (see FIG. 1).

  Next, in the sequential molding apparatus 1, the molding roller 5 is moved upward from the state where the roller unit 50 is in the reference position and the other end thereof is inclined upward (relative angle is θ + α). 4 is moved downward along the axis of the rotation shaft S1 and rotated by the molding die 4, and is pressed against the roller portion 50 of the molding roller 5 (FIG. 4A). )reference).

  At this time, in the molding roller 5, the molding surface 50 a on the swing shaft portion 52 side is pressed against the part 2 to be molded, and the roller part 50 is rotated by the friction force generated between the molding part 2 and the part 2 to be molded. In conjunction with the rotation, it is rotated together (relative rotation). Then, the molding component 5 is gradually plastically deformed by the relative rotation of the molding roller 5 and the molding component 2 with the molding component 2 being pressed against the molding roller 5 (FIG. 4B). ) To (d)).

  In particular, in the molding method of the present embodiment, the roller part 50 is repeatedly swung up and down and moved up and down while the part to be molded 2 is pressed against the molding roller 5 (the roller part 50). The pressure contact state of the molding surface 50a of the roller unit 50 is changed. That is, in the molding roller 5, the roller unit 50 is moved in the axial direction of the rotation axis S1 of the molded part 2 while changing the relative angle θ of the rotation axis S2 of the roller unit 50 with respect to the rotation axis S1 of the molded part 2. Thus, the part 2 to be molded is pressed against the roller portion 50 with a predetermined molding load.

  As described above, the roller portion 50 repeats the vertical swing and the vertical movement, so that the portion of the molding target 2 that is in contact with the roller portion 50 of the molding roller 5 is the die 40 of the molding die 4 and the molding roller 5. Rolling is performed toward the outside in the radial direction with the rotation axis S1 as the center at a distance from the roller unit 50. Eventually, the forming roller 5 and the molding die 4 serve as an extending portion 3b in which a rotationally symmetric shape around the rotation axis S1 (center axis) and a flange surface (conical surface) are formed radially outward. A molded part 3 having a flange portion is molded.

  When molding is completed, in the sequential molding apparatus 1, the molding roller 5 is moved upward, the pressure contact between the molded part 2 and the molding roller 5 is eliminated, and the molding die 4 is stopped. The molded part 3 is taken out of.

  As described above, the sequential molding apparatus 1 of the present embodiment is a sequential molding apparatus 1 that sequentially molds a rotationally symmetric shaped molded part 3 by plastically deforming a molded part 2 by a molding roller 5. The roller 5 includes a roller portion 50 formed with an arc-shaped forming surface 50a on which the workpiece 2 is pressed, and a shaft portion 51 on which the roller portion 50 is rotatably supported. While the component 2 is in pressure contact with the molding surface 50a of the roller part 50, the rotational axis S1 of the molded part 2 is changed while the relative angle θ of the rotational axis S2 of the roller part 50 to the rotational axis S1 of the molded part 2 is changed. Since the roller portion 50 is moved in the axial direction of the roller to change the pressure contact state of the molding surface 50a of the roller portion 50 against the part 2 to be molded, the degree of freedom of movement of the molding roller 5 is increased. , Improve the productivity of molded parts 3 It can be.

  That is, in the sequential molding apparatus 1 of the present embodiment, in the molding roller 5, the relative angle θ of the roller portion 50 with respect to the rotation axis S1 of the molded part 2 is changed, and the axis of the rotational axis S1 of the molded part 2 is changed. Since the roller portion 50 is configured to move in the direction, the degree of freedom of movement of the forming roller 5 is increased. Therefore, by repeating the vertical swing and vertical movement of the roller unit 50, it is possible to apply a molding load to the molded part 2 from an arbitrary direction, and the control accuracy of the material flow of the molded part 2 is improved. Therefore, the molded part 2 can be plastically deformed to have an arbitrary shape, and the productivity of the molded part 3 is improved. Further, since the degree of freedom of movement of the roller portion 50 in the molding roller 5 is increased, it is possible to effectively prevent the occurrence of buckling, distortion, etc. exceeding the molding limit in the molded part 2 during molding.

  Further, since the roller part 50 is formed so as to have an arc-shaped molding surface 50a, the contact area of the roller part 50 with the part 2 to be molded can be reduced, and molding that is applied to the molding roller 5 during molding. The load can be reduced. Therefore, the restriction of the molding load at the time of molding is reduced, and the productivity of the molded part 3 is improved.

  The forming roller 5 includes a swinging shaft portion 52 that is disposed at an intersection position between the rotation shaft S1 of the part 2 to be molded and the rotation shaft S2 of the roller portion 50 and supports one end of the roller portion 50. Therefore, the other end of the roller portion 50 is configured to be swingable in the axial direction of the rotation shaft S1 of the molded part 2 with the swing shaft portion 52 as the swing center. By simply swinging the roller portion 50 in the vertical direction about the swing center 52, the press contact state with the part 2 to be molded can be easily changed and the molding can be performed sequentially.

  Further, the forming roller 5 is configured such that the swing shaft portion 52 can move linearly along the axial direction of the rotation shaft S1 of the molded part 2, so that the swing shaft portion 52 moves up and down. By simply moving the roller part 50 up and down in conjunction with the rotation, the pressure contact state with the part 2 to be molded is easily changed while the center of oscillation of the roller part 50 is always positioned on the rotation axis S1. can do.

  The sequential molding apparatus 1 and sequential molding method of the present embodiment are not limited to the above-described embodiments, and various modifications can be made without departing from the object of the present invention.

  That is, in the sequential molding apparatus 1 of the above-described embodiment, the molded part 3 having the extended portion 3b in which the flange surface (conical surface) is formed outward in the radial direction is molded. The final shape is not limited to this. Specifically, as shown in FIG. 5, it has a shape having a flat surface (FIG. 5A), or a flange surface (inverted conical surface) whose axial thickness increases radially outward. It may be formed into a shape (FIG. 5 (b)), a shape having a convex surface (FIG. 5 (c)), a shape having a concave surface (FIG. 5 (d)), or the like. As described above, the sequential molding apparatus 1 can appropriately cope with the shape deformation in the molded part 3.

  Further, in the sequential molding apparatus 1 of the above-described embodiment, the configuration in which the molded member 2 is rotated with respect to the fixed molding roller 5 at the time of molding has been described. However, this configuration includes the molding roller 5 and the molded component. For example, the molding roller 5 may be configured to rotate about the rotation axis S1 with respect to the fixed molding target 2 or the molding roller 5 may be rotated. The molded part 2 may be configured to rotate about the same rotation axis S1. However, in the latter case, the rotation direction of the molding roller 5 and the rotation direction of the molded part 2 are preferably opposite to each other.

  Further, in the forming roller 5 of the above-described embodiment, the one roller portion 50 is arranged, but the number of the roller portions 50 constituting the forming roller 5 is not limited to this, for example, A plurality of roller units 50 may be used. However, in such a case, the rollers 50 are arranged so that the operations (vertical movement, vertical swing, etc.) of the mutual roller units 50 are not hindered.

  Further, in the forming roller 5 of the above-described embodiment, the shaft portion 51 is formed by a single rod-shaped member. For example, the roller portion 50 is supported at both ends by the shaft portion 51 formed by a pair of rod-shaped members. May be. Further, the shaft portion 51 is configured to be inserted through the through hole of the roller portion 50, but the roller portion 50 may be cantilevered by the shaft portion 51.

1 is a side sectional view schematically showing the overall configuration of a sequential molding apparatus according to an embodiment of the present invention. FIG. 3 is a side cross-sectional view of a molded part and a molded part. The side view which showed the mode of the rocking | fluctuation of the roller part in a forming roller. The side view which showed the process of the sequential molding method using a sequential molding apparatus. Side sectional drawing which showed the molded component of another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Successive molding apparatus 2 Molded part 3 Molded part 4 Molding die 5 Molding roller 50 Roller part 50a Molding surface 51 Shaft part 52 Oscillating shaft part S1, S2, S3 Rotating shaft

Claims (6)

In a sequential molding apparatus that plastically deforms a molded part by a molding roller and sequentially molds a rotationally symmetric shaped molded part,
The forming roller is
A roller part formed with an arc-shaped molding surface on which a part to be molded is pressed,
The roller part comprises a shaft part rotatably supported,
The roller in the axial direction of the rotation axis of the molded part while changing the relative angle of the rotation axis of the roller part with respect to the rotation axis of the molded part in a state where the molded part is pressed against the molding surface of the roller part A sequential molding apparatus characterized by changing the pressure contact state of the molding surface of the roller part with respect to the part to be molded by moving the part. The forming roller is
It is disposed at the intersection of the rotating shaft of the molded part and the rotating shaft of the roller portion, and comprises a swing shaft portion that supports one end of the roller portion,
2. The sequential molding apparatus according to claim 1, wherein the other end of the roller portion is swingable in the axial direction of the rotation shaft of the part to be molded with the swing shaft portion as a swing center.   The sequential forming apparatus according to claim 2, wherein the forming roller is configured such that the swing shaft portion is linearly movable along the axial direction of the rotation shaft of the part to be formed. In a sequential molding method in which a molded part is plastically deformed by a molding roller and a molded part having a rotationally symmetric shape is sequentially molded.
The forming roller is
A roller part formed with an arc-shaped molding surface on which a part to be molded is pressed,
The roller part comprises a shaft part rotatably supported,
At the time of molding, while the part to be molded is in pressure contact with the molding surface of the roller part, while changing the relative angle of the rotation axis of the roller part to the rotation axis of the part to be molded, the axial direction of the rotation axis of the part to be molded The sequential molding method is characterized by changing the pressure contact state of the molding surface of the roller part with respect to the part to be molded by moving the roller part. The forming roller is
It is disposed at the intersection of the rotation axis of the part to be molded and the rotation axis of the roller part, and comprises a swinging shaft part on which one end of the roller part is supported,
5. The sequential molding method according to claim 4, wherein at the time of molding, the other end of the roller portion is swung in the axial direction of the rotation shaft of the molded part with the swing shaft portion as a swing center.   The sequential molding method according to claim 5, wherein the molding roller linearly moves the swinging shaft portion along the axial direction of the rotation shaft of the part to be molded at the time of molding.

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