JP2001047181A - Device for forming metal product having dissimilar shape on surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To favorably form a plurality of kinds of metal products which are different in shape between a dissimilar part and an axis-symmetrical part, and have the dissimilar part on their surface. SOLUTION: Second dies 54, 56 provided with forming parts 72, 64 corresponding to the shape of dissimilar parts 118, 120 of a metal product 122 are fitted in an attachable/detachable manner to/from a first die 16 to be integratedly rotated around a center 13 while supporting a metal stock 116, a roller member 106 to be rotatably supported around a rotary shaft 112 parallel to the axis 13 is moved in the direction parallel to the axis 13 by a moving mechanism 18 independent from the dies 16, 54, 56 so as to be advanced/retracted to/from the first die 16. The metal stock 116 is pressed by the roller member 106 through the advancement of the roller member 106 to the first die 16 to form a pressed part of the metal stock 116 in an axis-symmetric shape, and further, to form the dissimilar parts 118, 120 of the shape corresponding to the forming part 72, 64 of the second dies 54, 56.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming and processing metal products, and more particularly, to an apparatus for forming and processing metal products having at least a part of an outer peripheral surface being axially symmetrical and having a deformed portion on the surface. It is about.

[0002]

BACKGROUND ART Conventionally, a metal product in which at least a part of an outer peripheral surface is axially symmetric and a deformed portion is provided on the surface, for example, one of gears having a plurality of teeth formed on the outer peripheral surface. When manufacturing a so-called special gear or the like in which the pitch is partially different due to a plurality of missing teeth or the like, the following processing method is generally employed.

[0003] That is, after forming a general gear having a constant pitch by die forming by forging, some of the teeth of the general gear are cut off by cutting to obtain a target special gear. The metal powder is filled in a mold having a molding cavity having a shape substantially corresponding to such a special gear, and after pressure molding, a method of sintering the metal powder or a lower mold having a molding cavity as described above is used. After setting a columnar metal material, the metal material is set up in a shape corresponding to the molding cavity by being set up with an upper die rotating around a central axis, a method using so-called rotary forging, etc. It is adopted.

[0004] However, among such various processing methods, a method combining forging and cutting uses a forging machine and a cutting machine, and also forms a metal powder under pressure and then fires. Since a pressing machine and a sintering furnace are used in the sintering method, no matter which method is adopted,
Not only do they require large types of equipment, which not only increases equipment costs, and thus overall processing costs,
Since the processing operation can be performed in two stages by using such two types of equipment, there is a problem that the processing time is inevitably increased.

On the other hand, when a working method utilizing rotary forging is carried out, only a rotary forging machine is used to form a target metal product at a time. Although superior productivity can be obtained compared to the case where two processing methods are employed, depending on the structure of the forming die of the rotary forging machine used, gears or the like having different pitches from each other due to the structure of the forming die. When molding multiple types of metal products with different shapes, prepare multiple types of dies corresponding to each metal product, and according to the type of metal product to be processed, mold the entire die. Since it is necessary to replace the mold, the burden of manufacturing cost of the mold and labor at the time of replacing the mold is large, and there are inherent problems in terms of economy, workability, and the like.

Accordingly, the applicant of the present application has disclosed in
In Japanese Patent Application Publication No. 166101, an apparatus having a novel structure as described below is disclosed as an apparatus for forming and processing a metal product in which at least a part of the outer peripheral surface is axially symmetric and has a deformed portion on the surface. That is, the lower mold has an upper mold and a lower mold which are opposed to each other so that they can approach and separate from each other, and the lower mold rotates integrally with the metal material while concentrically supporting the metal material that gives the target metal product. While being pressed against the supporting surface of the metal material, a deformed portion forming die provided with a forming portion forming a deformed portion of the metal product is configured to be detachably attached, while the lower die and A taper roller, which is rotated between the upper mold and a rotation axis intersecting the center axis of the lower mold, is arranged so as to be able to approach and separate from the lower mold, and is integrally rotated with the lower mold. By pressing the metal material with a taper roller approached to the lower mold, the pressed portion of the metal material is formed into an axially symmetric shape, and is extended along the support surface of the lower mold. , In such an expanded part Proposed a molding apparatus that forms a deformed portion having a shape corresponding to the molding portion of the profiled section forming type.

In such a forming apparatus, when a plurality of types of metal products having different shapes of the deformed portion are formed, the mold for forming the deformed portion is simply replaced according to the shape of the deformed portion. Therefore, there is no need to replace the entire mold including the upper and lower molds, so that multiple types of metal products with different shapes of different parts can be obtained with excellent economic efficiency and workability. Can be formed very advantageously.

However, in the molding apparatus exemplified in the above publication, a receiving hole having a shape corresponding to the half-shape of the tapered roller is provided on the opposing surface of the upper die facing the supporting surface of the lower die. A roller holder for rotatably holding the taper roller is attached to the upper mold, and the taper roller is held by the roller holder in a state housed in the housing hole, so that the gap between the upper mold and the lower mold is maintained. , The shape of the axially symmetrical part of the target metal product is changed, since it is arranged so that it can rotate and move closer to and away from the lower mold as the upper mold moves. Therefore, when the taper roller is replaced with a different shape, depending on the shape of the replaced taper roller, it becomes difficult to accommodate the taper roller in the accommodation hole of the upper mold. In some cases, it is necessary to replace the hole with another one with a different shape.Therefore, there is a merit that multiple types of metal products with different shapes of the deformed part can be formed with excellent economic efficiency and workability. It will be greatly damaged.

[0009]

Here, the present invention has been made in view of the above-mentioned circumstances, and at least a part of an outer peripheral surface thereof is axially symmetrical.
In addition, a metal product having a deformed portion on the surface, in which not only the shape of the deformed portion is different from each other but also the shape of the axially symmetric portion is different from each other, with excellent economic efficiency and workability. An object of the present invention is to provide an apparatus for forming and processing a metal product having a deformed portion on its surface, which can be formed advantageously.

[0010]

According to the present invention, there is provided an apparatus for forming and processing a metal product having at least a part of an outer peripheral surface axially symmetric and having a deformed portion on the surface. (A) a first mold configured to be integrally rotatable about a central axis together with the metal material in a state where the metal material providing the metal product is supported concentrically; Removably attached to one mold,
A second mold provided with a forming portion corresponding to at least a shape of a deformed portion of the metal product on a surface continuous to a supporting surface of the first mold supporting the metal material; A first mold having an opposing surface opposed to the support surface, being independently supported by the first mold and the second mold, and having the central axis of the first mold And (d) moving the roller member in a direction parallel to the central axis so as to be rotatable about a rotation axis parallel to the axis and to be movable in a direction parallel to the central axis. A moving mechanism for relatively approaching and separating from the first mold, wherein the metal material rotated integrally with the first mold is moved closer to the first mold by the moving mechanism. Pressed on an opposing surface of the roller member opposing the support surface of the first mold. By pressing the metal material with the first mold, a portion pressed by the roller member of the metal material is formed into an axially symmetric shape, and the metal material is stretched along the support surface of the first mold. Thus, a metal product forming and processing device having a deformed portion on the surface, characterized in that the deformed portion corresponding to the formed portion of the second mold is formed in the extended portion of the pressed portion. , Its gist.

In short, in the apparatus for forming and processing a metal product having a deformed portion on the surface according to the present invention, the metal material is integrally supported with the first mold while being supported by the support surface of the first mold. Under the rotated state, the roller member facing the support surface of the first mold is moved closer to the roller member, whereby the roller member is pressed against the outer peripheral surface of the roller member. By being pinched between the metal member and the roller member, local deformation due to rolling contact with the opposing surface of the roller member is repeatedly caused in the circumferential direction at the pressed portion of the metal material, and the pressed portion is axially symmetric. While being formed along the support surface of the first mold, and the expanded portion of the pressed portion is plastically deformed into a shape corresponding to the molded portion of the second mold. And the extended part
The deformed portion corresponding to the molded portion is formed.

In the apparatus of the present invention, as described above, the second mold having the forming portion for forming the deformed portion in the expanded portion of the metal material is detachable from the first mold. Since it is configured to be attached to the metal mold, it is possible to mold metal products having different shapes of deformed parts simply by replacing the second mold with one having a different shape of the forming part. Therefore, when molding a plurality of types of metal products having different shapes of the deformed portions from each other, a large labor burden such as replacing the entire apparatus is not required, and the shape of the deformed portions of the target metal product is not required. There is no need to prepare a plurality of different types of forming apparatuses, and the economical burden can be advantageously reduced.

In the apparatus of the present invention, in particular, as described above, the metal material is pressed on the surface facing the support surface for supporting the metal material, and an axially symmetric portion is formed at the pressed portion. The roller member for molding is independently rotatably supported with respect to the first mold and the second mold, and is moved closer to the first mold by a predetermined moving mechanism, whereby the Since the metal material can be pressed, the roller member is replaced with another one having a different shape of the facing surface in order to form a plurality of types of metal products having different shapes of the axially symmetric portion. When you do that,
There is no need to replace any components other than the roller member of the forming apparatus, such as the first mold and the second mold, and thereby,
Unlike the conventional apparatus, the labor and economic burden associated with the replacement of the roller member can be reduced as much as possible.

Therefore, in the apparatus for forming and processing a metal product having a deformed portion on the surface according to the present invention, at least a part of the outer peripheral surface is axisymmetric and the metal product has a deformed portion on the surface. Therefore, not only the shapes of the deformed portions are different from each other, but also a plurality of types of metal products having different shapes of the axially symmetric portions can be formed extremely advantageously with excellent economic efficiency and workability. .

According to one preferred embodiment of the apparatus for forming and processing a metal product having a deformed portion on its surface according to the present invention, the moving mechanism supports the metal material of the first mold. A third mold facing the surface and arranged so as to be relatively close to and separated from the first mold. In the molding apparatus having such a configuration, as a moving mechanism for moving the roller member, a mold closing mechanism of a general molding die having two dies arranged so as to be close to and separated from each other is used. Accordingly, it is possible to suppress as much as possible the complexity of the structure of the molding apparatus and a rise in manufacturing cost.

Further, according to another advantageous aspect of the apparatus for forming and processing a metal product having a deformed portion on its surface, according to the present invention, the moving mechanism includes the roller member and the first mold. Pressing in a direction parallel to the central axis, and configured to include a pressing member to move in a direction parallel to the central axis, the pressing member, at least in the central portion,
It is configured to press the roller member.

According to this configuration, even if only one roller member is provided, the one roller member is pressed with a predetermined pressing force by the pressing member. At this time, a reaction force against the pressing force is applied only to a portion around the central portion of the pressing member, and an acting force based on the reaction force causes the pressing member to rotate the pressing member in a direction such that it is rotated. Without being affected by
For example, when the pressing member is pressed against the roller member, it is possible to effectively prevent the occurrence of operation failure such as stiffening between the pressing member and the supporting member that supports the pressing member.

Therefore, in the molding apparatus having the above-described configuration, when the pressing member presses the roller member, various operations caused by the reaction force to the pressing force of the pressing member against the roller member are performed. Without causing defects, the number of roller members conventionally used in plurals can be reduced to one. As a result, the manufacturing cost of the forming apparatus by reducing the number of parts can be reduced more effectively. It can be aimed at.

Further, according to another preferred embodiment of the apparatus for forming and processing a metal product having a deformed portion on its surface according to the present invention, the roller member has a direction intersecting a central axis of the first mold. The first mold is moved in one direction in such a direction, so that the first mold is positioned opposite to the support surface. In the forming apparatus having such a configuration, if the roller member is moved in the direction opposite to the one direction, the roller member is separated from the support surface of the first mold, and the Depending on the work of placing the metal material on such a support surface,
Removal work of the metal product formed on the support surface from the support surface is not disturbed by the roller member,
In addition to being able to be performed more smoothly, it is possible to easily apply a lubricant or the like to the surface facing the metal material that provides the target metal product, the contact surface with the moving mechanism, and the like, As a result, the forming process of the metal product can proceed more smoothly, and the sticking of the roller member and the metal material due to the contact with the metal material and the like while the roller member is rotating is effective. Can be prevented.

According to still another preferred embodiment of the apparatus for forming and processing a metal product having a deformed portion on its surface according to the present invention, the roller member is parallel to a central axis of the first mold. In the direction, the roller member is configured to be urged by urging means that urges the roller member in a direction to relatively separate from the first mold. In the molding apparatus having such a configuration, after applying a predetermined acting force to the roller member and moving the roller closer to the first mold, the roller member is simply released from the acting force on the roller member. Can be automatically moved away from the first mold, whereby excellent operability can be exhibited.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, in order to clarify the present invention more concretely, referring to the drawings, a detailed description will be given of the configuration of a metal product forming apparatus having a deformed portion on the surface according to the present invention. Will be described.

First, FIG. 1 shows a gear as a metal product having a deformed portion on its surface, in particular, a portion having a large number of internal teeth and external teeth, and a portion where some of the external teeth are missing. Used when molding special gears formed as parts,
An example of an apparatus for forming and processing a metal product having a structure according to the present invention is schematically illustrated. As is clear from this figure, the molding apparatus 10 includes a molding die 14 arranged on a base 12. The molding die 14 has a lower die 16 as a first die and an upper die 18 as a third die.

Then, as shown in FIG.
The upper die 18 of the 4 includes the upper die-side fixing block 15 and the holder plate 17. The upper die-side fixing block 15 constituting the upper die 18 has an overall shape of a substantially stepped cylindrical shape having a small diameter portion on the lower side, and the holder plate 17 as a whole has a substantially thick circle. It has a plate shape. The upper mold-side fixing block 15 and the holder plate 17 are vertically arranged at a position coaxial with the center axis 13 of the molding die 14, and a lower end portion is located in the holder plate 17 and an upper end portion thereof. The fixing bolt 2 inserted into the upper mold-side fixed block 15 in a state where the relative rotation is prevented by the detent pins 19 respectively inserted into the upper mold-side fixed block 15.
At 1, it is bolted.

On the other hand, the lower die 16 comprises a lower die-side fixing block 20, an inner holder 22, a knockout member 24, and an outer holder 26 which are coaxially arranged with respect to the upper die 18.
It is comprised including. In the lower die-side fixing block 20 of the lower die 16, a plurality of the fixing bolts 28 and the plurality of detent pins 30 respectively move the tip of the shaft portion or one end in the length direction to the lower die-side fixing block. 20 and are positioned in such a manner as to protrude upward from the upper surface of the rod 20, respectively, and a long and narrow rod-shaped knockout pin 32 is provided.
The lower mold-side fixed block 20 is inserted and movably inserted in the height direction, with its one end in the length direction projecting upward from the upper surface. In addition, this knockout pin 3
2 is connected to a knockout device (not shown),
With the operation of the knockout device, the knockout device is protruded upward.

The inner holder 22 has a substantially stepped columnar overall shape in which the lower side is a small diameter section 34 and the upper side is a large diameter section 36. Further, in the inner holder 22, a shallow circular recess 3 is formed on the upper surface thereof.
8 are provided at the bottom of the circular recess 38.
The detent pin 40 is arranged in a state where an end on one side in the length direction is projected. On the lower surface of such an inner holder 22, the upper end of the detent pin 30 arranged near the center of the upper surface of the lower die-side fixing block 20 is used for the detent pin provided on the lower surface. In a state of being inserted into the hole 41, the fixing block 28 is placed at the center of the upper surface of the lower mold-side fixing block 20, and the fixing bolt 28 disposed there is screwed into the small-diameter portion 34. As a result, the inner holder 22 is fixed to the lower mold-side fixed block 20 so as to be relatively non-rotatable.

On the other hand, the knockout member 24 has a substantially thick cylindrical shape having substantially the same height as the inner holder 22 as a whole, and the diameter of the inner hole on the upper side thereof is larger than that of the inner holder 22. While the outer diameter of the diameter portion 36 is slightly larger than the outer diameter, the diameter of the inner hole on the lower side is increased by forming a thickened portion 42 which is increased inward on the inner surface of the lower cylindrical wall. As a result, the outer diameter of the small diameter portion 34 of the inner holder 22 is slightly larger than the outer diameter of the small diameter portion 34 of the inner holder 22. The upper surface of the knockout member 24 is a supporting surface 44 that supports a metal material 116 that provides a target special gear (see FIG. 7).
A knockout pin insertion hole 46 having a predetermined depth and a detent pin hole 47 are provided. Note that the support surface 44 of the knockout member 24 has a tapered surface shape in which an outer corner is chamfered and an outer peripheral portion is inclined downward. Then, such a knockout member 24 is externally inserted into the inner holder 22, and inside the knockout pin insertion hole 46 and the detent pin hole 47, the inner peripheral portion of the upper surface of the lower mold side fixing block 20. The knockout pin 32 and the detent pin 30, which are protruded from the lower side, are placed on the upper surface of the lower mold-side fixed block 20 in a state where the one end in the length direction is inserted therethrough.

Thus, in the knockout member 24, the support surface 44 is arranged in a state where the support surface 44 forms a continuous surface with the upper surface of the inner holder 22 and the relative rotation with respect to the lower mold side fixed block 20 is prevented. At the same time, as the knockout pin 32 projects by the knockout device, the knockout pin 32 is caused to project upward while being guided by the inner holder 22. In addition, here, when such a knock-out member 24 moves in a protruding manner,
The upper end surface of the thickened portion 42 of the knockout member 24 is
By contacting and engaging the stepped surface of the inner holder 22 where the small-diameter portion 34 and the large-diameter portion 36 are stepped, the knockout member 24 is prevented from detaching upward. Also, after the projecting movement, the knockout member 24 is returned to the original state by the urging force of the extension coil spring 48 externally inserted into the knockout pin 32, as in the related art.

On the other hand, the outer holder 26 has a substantially cylindrical overall shape that is thicker than the knockout member 24, and has a height lower than the knockout member 24 by a predetermined dimension and slightly smaller than its outer diameter. It has a large inner diameter. Further, in the outer holder 26, similarly to the inner holder 22, a shallow circular recess 50 is formed on the upper surface.
Is provided, and a detent pin 52 is disposed in the circular recess 50 with one end in the length direction projecting upward. Then, such an outer holder 26 is externally inserted into the knockout member 24, and the upper end of the detent pin 30 arranged on the outer peripheral portion of the upper surface of the lower mold side fixed block 20 is provided on the lower surface. In a state where the fixing bolt 28 is inserted into the detent pin hole 49, it is placed on the upper surface of the lower mold side fixing block 20, and the fixing bolt 28 arranged on the outer peripheral portion of the upper surface is screwed in.
As a result, it is fixed to the lower mold-side fixed block 20 so as not to rotate relatively.

As described above, the inner holder 22 and the outer holder 26 are fixed in position relative to the lower mold-side fixing block 20, and the knockout member 24 cannot move relative to the lower mold fixed block 20 in a state in which the knockout member 24 can protrude upward by a predetermined dimension. In other words, the lower mold 16 is assembled so as to be integrally rotatable, so that the lower mold 16 is fixed to the lower mold side fixed block 20 and the inner and outer holders 22 and 2.
6 and the knockout member 24 are integrally formed as an integrated product.

In this case, in particular, the lower die 16 having the above-described structure is provided with a second gear in which the inner teeth and the outer teeth are formed on the inner and outer peripheral surfaces of the special gear as the target metal product. An internal tooth forming die 54 and an external tooth forming die 56 as molds are removably assembled.

That is, as is clear from FIGS. 3 and 4, the internal tooth forming mold 54 has a substantially cylindrical shape with a low height as a whole. In the inner peripheral portion, three holes for fixing bolts 58 and holes for detent pins 60 are provided at equal intervals in the circumferential direction and penetrate the internal tooth forming mold 54 in the height direction. , Is formed. Further, in the internal tooth forming mold 54, an outward flange 62 projecting outward by a predetermined height outward is provided integrally and continuously at the upper end of the outer peripheral surface in the circumferential direction. In addition, the distal end surface of the outward flange portion 62 is provided with a convex portion corresponding to the tooth groove of the internal gear of the target special gear, so that the internal tooth formation having a tooth profile corresponding to the internal gear is formed. Many recesses 64 are provided.

As shown in FIGS. 5 and 6, the external tooth forming die 56 has a substantially annular overall shape. And even in this external tooth forming die 56, the internal tooth forming die 5
Similarly to 4, around the inner hole, there are three fixing bolt holes 66 and three detent pin holes 68 that penetrate the inner hole in the height direction at equal intervals in the circumferential direction. In addition, a thick outward flange 70 is integrally provided at the upper end of the outer peripheral surface. Further, in the external tooth forming die 56, the convex portion corresponding to the tooth groove of the external tooth of the special gear to be formed is provided at the upper end edge of the inner surface forming the inner hole, A large number of external tooth forming recesses 72 having a tooth shape corresponding to the external teeth are formed. The internal tooth forming die 54 and the external tooth forming die 5
6, the heights of the portions other than the formation portions of the outward flange portions 62 and 70 can be accommodated in the circular recesses 38 and 50 formed on the upper end surfaces of the inner holder 22 and the outer holder 26. It has an outer diameter.

As can be seen from FIG. 2, the inner tooth forming die 54 and the outer tooth forming die 56 having the above-described configuration are used to connect the lower end surfaces of the outward flange portions 62 and 70 to the inner holder 22 and the outer holder 22. The detent pins are brought into contact with the respective upper surfaces of the holders 26 and project from the bottom surfaces of the circular recesses 38, 50 of the inner and outer holders 22, 26 into the detent pin holes 60, 68, respectively. 40, 52 are inserted and coaxially accommodated in the respective circular recesses 38, 50 while being inserted, and further inserted into the fixing bolt holes 58, 66 under such an arrangement. The tightened fixing bolts 74 are screwed into the inner holder 22 and the outer holder 26, respectively.

Thus, the internal tooth forming die 54 and the external tooth forming die 5
6 are fixed to the lower mold 16 with bolts 74 so as to be able to rotate integrally with the lower mold 16, and are detached from the lower mold 16 by removing the fixing bolts 74, 74. That can be done. Further, in particular, in the internal tooth forming die 54, in the fixed state as described above, the distal end surface of the outward flange portion 62 is opposed to the upper surface of the inner holder 22 which forms a continuous surface with the support surface 44 of the knockout member 24. And a large number of internal tooth forming recesses 64 formed on the distal end surface of the outward flange portion 62 have their bottom surfaces continuous with the support surface 44 of the knockout member 24. It is located in a state. On the other hand, in the external tooth forming die 56, the upper end portion of the inner surface providing the inner hole is disposed so as to be continuous with the support surface 44 of the knockout member 24, so that a large number of upper end edges of the inner surface are formed. The formed external tooth forming recess 72 has its bottom surface continuous with the support surface 44 of the knockout member 24 on the side opposite to the side where the internal tooth forming recess 64 of the internal tooth forming mold 54 is disposed. It is located in a state. As is apparent from this, in this specific example, the molding portion provided in the second mold is constituted by the internal tooth forming recess 64 and the external tooth forming recess 72.

As shown in FIG. 1, the lower die 16 having the above-described structure is fixedly mounted on the lower die mounting plate 80 disposed on the base 12. The lower die mounting plate 8 to which the lower die 16 is mounted
Numeral 0 is rotatably supported on the base 12 and is coaxially attached to a rotation shaft 86 of a motor 84 in a motor accommodating hole 82 formed in the base 12. The lower mold 16 is rotated around the rotation shaft 86 of the motor 84, in other words, around the central axis 13 of the molding die 14, with the rotation of the motor 84.

On the other hand, the upper die 18 is fixedly mounted on an upper die mounting plate 90 rotatably supported by an upper die moving plate 88 arranged opposite to the base 12.
The upper movable plate 88 is supported by a plurality of guide posts 92 erected on the base 12 so as to be slidable in the vertical direction. Further, a fixing plate 94 is fixedly mounted on the upper ends of the plurality of guide posts 92, and a piston rod 96 is mounted on the base of the fixing plate 94 by a hydraulic mechanism (not shown). An upper die moving plate pressurizing cylinder 98 which is operated to protrude toward the side 12 is attached. And, the upper moving plate pressing cylinder 9
The distal end of a piston rod 96 in 8 is fixed to the upper die moving plate 88. As a result, the upper die 18 can rotate integrally with the upper die mounting plate 90 around the central axis 13 of the molding die 14, and the piston rod in the upper die moving plate pressing cylinder 98 The upper die mounting plate 90 and the upper die 18 are moved up and down with the projection and retraction of the 96, so that the upper die 18 can be moved closer to and away from the lower die 16. It is becoming.

Further, in the molding apparatus 10 in which such a molding die 14 is disposed, a roller pressing cylinder 100 is disposed on an outer peripheral portion on the base 12. The roller pressurizing cylinder 100 includes a piston rod 104 having a clamp 102 having a substantially U-shaped cross section fixed at a distal end thereof.
It is configured to project toward the molding die 14 in a direction perpendicular to the central axis 13 of the die 14 and to be able to perform a retracting operation.

Then, such a piston rod 104
A taper roller 106 as a roller member is attached to the clamp 102 so as to be rotatable around a rotation axis 112 parallel to the central axis 13 of the molding die 14. In this taper roller 106, the upper outer peripheral surface is a cylindrical surface, while the lower outer peripheral surface is a tapered surface that gradually decreases in diameter as going downward. Is formed as a flat annular surface 107. In addition, the lower outer peripheral surface which is a tapered surface also has a two-stage tapered surface shape in which a taper angle is changed at an intermediate portion thereof,
The lower tapered surface 110 located on the lower side has a larger taper angle (smaller inclination angle) than the upper tapered surface 108 located on the upper side.

Thus, the forming apparatus 10 of the present embodiment
In this case, the outer peripheral surface of the taper roller 106 having the outer peripheral surface having the shape as described above is rotatable around a rotation axis 112 parallel to the central axis 13 of the molding die 14.
As the piston rod 104 in the roller pressurizing cylinder 100 projects and retracts, it can be moved toward and away from the molding die 14 in the direction perpendicular to the center axis 13 while facing the molding die 14. It has become. In this case, in particular, due to the approach movement of the taper roller 106 to the molding die 14 due to the projecting operation of the piston rod 104, the annular surface 107 of the taper roller 106 contacts the annular surface 107 under the mold opening of the molding die 14. The upper tapered surface 108 and the lower tapered surface 110 are configured to be opposed to the support surface 44 of the knockout member 24 in the lower die 16 (see FIG. 8).
Under the state of the taper roller 106 approaching the molding die 14,
The upper die 18 of the molding die 14 is moved closer to the lower die 16 with the projecting operation of the piston rod 96 in the upper die moving plate pressurizing cylinder 98, so that the upper end surface of the taper roller 106 is moved. The lower die 1 is pressed downward by the lower end surface of the upper die 18, and the taper roller 106 is moved vertically downward parallel to the central axis 13 of the molding die 14.
6 (see FIG. 9).

As is apparent from this, in the present embodiment, the opposed surface of the roller member is constituted by the annular surface 107, the upper tapered surface 108, and the lower tapered surface 110 of the tapered roller 106. Further, the roller member is formed into a molding die (a second die) by an upper die moving mechanism including an upper die 18 and an upper die moving plate pressing cylinder 98 and a piston rod 96 for moving the upper die 18 toward and away from the lower die 16. The moving mechanism is configured to move in a direction parallel to the central axis of the first mold). Further, in the molding apparatus 10 of the present embodiment, a compression coil spring 114 as an urging means is fixed between the lower end surface of the taper roller 106 and the lower portion of the clamp 102 located below the taper roller 106. It is arranged in. Thereby, the taper roller 106 is pressed downward with the approach movement of the upper mold 18 to the lower mold 16,
When the upper die 18 is separated from the lower die 16 in a state where the lower part 16 is approached, the compression coil spring 1
14, upward, that is, the lower mold 16
The taper roller 106 is automatically moved back to a position before being moved closer to the lower die 16 by being moved in a direction away from the lower die 16.

Therefore, when forming the target special gear using the forming apparatus 10 having such a structure, first, as shown in FIG. 7, the forming die 14 is opened. Then, with the lower die 16 and the upper die 18 being separated from each other, a substantially thick annular metal material 116 is set on the support surface 44 of the knockout member 24 in the lower die 16. At this time, in the case of the metal material 116, the knockout member 24 is inserted in a state where the internal tooth forming die 54 fixed to the inner holder 22 of the lower die 16 is inserted into the inner hole.
Is supported on the support surface 44 of the lower mold 16 so as to be concentrically supported by the lower mold 16.

Next, as shown in FIG.
By driving the motor 84 attached to the lower mold 16
And the metal material 116 set on the lower mold 1
6 are integrally rotated in one direction around the central axis 13 (the direction indicated by the arrow in FIG. 8). On the other hand, the piston rod 104 in the roller pressurizing cylinder 100 is caused to protrude, and the taper roller 106 rotatably attached to the tip of the piston rod 104 is moved to the lower mold 1 under the mold opening.
6 is moved between the opposing surfaces of the upper die 18. Then, the annular surface 10 of the tapered roller 106 is thereby
7, the upper tapered surface 108, and the lower tapered surface 110 are opposed to the support surface 44 of the lower die 16, and are opposed to the upper end surface of the metal material 116 set on the support surface 44.
At that time, or before the taper roller 106 moves, the upper and lower surfaces of the taper roller 106, the metal material 1
A known lubricant is applied to the upper end surface of the upper die 16 and the lower end surface of the upper die 18 as necessary.

Thereafter, as shown in FIG. 9, the upper die 18 is moved closer to the lower die 16 to close the molding die 14, and the upper die 18 is closed with the progress of the clamping. The upper end surface of the taper roller 106 is pushed down by the lower end surface, and the taper roller 106 is moved closer to the lower die 16 located thereunder. Then, with the lower tapered surface 110 of the taper roller 106 set (opposed position) on the support surface 44 of the lower mold 16, the lower taper surface 110 is brought into contact with the upper end corner of the metal material 116 which is rotated integrally with the lower mold 16. At this time, the taper roller 106 is connected to the central shaft 13 of the molding die 14.
Is rotated in a direction opposite to the rotation direction of the metal material 116 about the rotation axis 112 parallel to the rotation direction.

Subsequently, as shown in FIG. 10, the upper die 18 is further moved closer to the lower die 16 so that the tapered roller 106 is formed into an annular surface 107, an upper tapered surface 108, and a lower tapered surface 110. At this time, the metal material 116 is pressed against the upper end surface of the metal material 116 which is integrally rotated with the lower mold 16, and the metal material 116 is brought into contact with the three outer peripheral surfaces 107, 108, 110 of the tapered roller 106 and the support surface 44 of the lower mold 16. Between the two.

As a result, the outer peripheral portion of the metal material 116 is pressed by the lower tapered surface 110 of the tapered roller 106, and is pinched between the tapered outer peripheral portion of the support surface 44 and the tapered roller 106. Lower tapered surface 11
0 and an axially symmetric tapered outer peripheral surface shape corresponding to the tapered outer peripheral portion of the support surface 44, which can be mainly expanded radially outward and the tip of the expanded portion. Are formed on the outer peripheral side of the support surface 44 with a plurality of external tooth forming recesses 72 of the external tooth forming die 56.
As a result, a large number of external teeth 118 having a shape corresponding to each external tooth forming recess 72 are formed at the distal end of the extended portion. It should be noted that in the extended portion of the metal material 116, such external teeth 118 are not formed in a portion corresponding to a portion where the external tooth forming recess 72 of the external tooth forming die 56 is not provided. .

The inner peripheral portion of the metal material 116 is formed by the upper tapered surface 108 and the annular surface 107 of the tapered roller 106.
And pressed between the horizontal inner peripheral portion of the support surface 44 and the upper taper surface 108 and the annular surface 107 of the tapered roller 106 and the horizontal inner peripheral portion of the support surface 44. With an axially symmetrical outer peripheral surface shape corresponding to the above, it is mainly expanded radially inward, and the front end of the expanded portion is a continuous surface on the inner peripheral side with respect to the support surface 44. The internal tooth forming die 54 is pushed into the large number of internal tooth forming recesses 64 of the internal tooth forming mold 54, so that a large number of internal teeth 120 having a shape corresponding to each internal tooth forming concave 64 are provided at the tip of the extended portion. It is formed.

As a result thereof, the outer peripheral surface has a tapered shape that is axially symmetric, and a large number of external teeth 118 and a large number of internal teeth 120 are provided at the outer peripheral edge and the inner peripheral edge. The target special gear 122 having the missing external teeth 118 is formed.

Next, as shown in FIG.
Is moved away from the lower mold 16 to open the molding die 14, while the piston rod 104 in the roller pressing cylinder 100 is pulled in and actuated, thereby moving the taper roller 106 away from the molding die 14, Furthermore,
Stopping the motor 84 attached to the base 12,
The rotation of the lower mold 16 around the central axis 13 is stopped. At this time, as described above, the taper roller 106 moves the compression coil spring 1 along with the separation movement of the upper die 18 from the lower die 16.
It is pushed up by the urging force of 14, and is automatically returned to the original position before being pushed down by the upper die 18.
Then, by operating a knockout device (not shown) to move the knockout pin 32 upward, the knockout member 24 is protruded upward,
The special gear 122 molded as described above is released from the molding die 14.

As described above, in the molding apparatus 10 according to the present embodiment, the metal material 116 is simply supported by the lower mold 16 and the By moving the mold 18 closer and pressing the taper roller 106 facing the metal material 116 against the annular surface 107, the upper taper surface 108, and the lower taper surface 110 that constitute the outer peripheral surface, the metal Material 116
Are the three outer peripheral surfaces 107 of the tapered roller 106,
108, 110 and a support surface 4 for supporting the metal material 116
4 and a plurality of external teeth 118 corresponding to the external tooth forming recess 72 of the external tooth forming die 56 are provided at the distal end on the outer peripheral side of the expanded portion. However, a number of internal teeth 120 corresponding to the internal tooth forming recesses 64 of the internal tooth forming die 54 are formed at the inner peripheral end thereof, and the target special gear 122 is formed at once. You are getting it.

In the molding apparatus 10, both the external tooth forming die 56 and the internal tooth forming die 54 are detachably fixed to the lower die 16 by fixing bolts 74, 74. Therefore, for example, in addition to the special gear 122 having the above-described structure, for example, the external teeth 118 and the internal teeth 120
The external teeth 118 and the internal teeth 120
In the case of forming a special gear 122 of a different type, such as one not provided with either one of them, simply remove the fixing bolts 74 without replacing the entire lower die 16 to form the external teeth. The mold 56 and the internal tooth forming mold 54 are replaced with those having the external tooth forming recess 72 and the internal tooth forming recess 64 corresponding to the shape of the external teeth 118 and the internal teeth 120 of the target special gear 122. By simply performing such a light work, it can be used for forming various special gears 122.

Moreover, in the molding apparatus 10, the taper roller 106 is attached to the clamp 102 fixed to the tip of the piston rod 104 in the roller pressing cylinder 100 disposed on the base 12. , Independently of the molding die 14,
In addition to the special gear 122 having the above-described structure, even when forming a special gear 122 having a different outer peripheral surface shape, the special gear 122 is simply attached to the clamp 102 without replacing the molding die 14 at all. Tapered roller 10
6 for forming various special gears 122 having different shapes of the axially symmetrical outer peripheral portions by simply replacing the tapered roller 106 with an outer peripheral surface capable of providing the axially symmetrical outer peripheral portions of the target special gear 122. It can be used as a device.

As described above, in the molding apparatus 10, the special gears 12 of the above-described different types are used.
When forming 2, the external tooth forming die 56 and the internal tooth forming die 5
4, or only the taper roller 106 is replaced, and the molding die 14 is not replaced at all. Therefore, the molding dies 14 corresponding to each of the special gears 122 are manufactured for forming the special gears 122 of different types. This can be done without any effort, and the manufacturing costs of the device can be reduced very effectively.

Therefore, the forming apparatus 1 according to the present embodiment.
If 0 is used, a plurality of types of special gears 122 in which the shapes of the internal teeth 120 and the external teeth 118 serving as the deformed portions are different from each other, and a plurality of types of special gears 122 in which the shape of the axially symmetric outer peripheral surface portion is different from each other are excellent. Thus, it can be formed very advantageously with economical efficiency and workability.

Further, in the forming apparatus 10 according to the present embodiment, the upper mold 18 is formed by the metal mold 116 used for forming a metal product.
As the taper roller 106 moves closer to and away from the lower mold 16 that supports the taper roller 16, the taper roller 106 is configured to move closer to and away from the lower mold 16. The complexity of the structure of the entire apparatus and the increase in the manufacturing cost of the apparatus due to the addition of the structure can be suppressed as much as possible.

Further, in the forming apparatus 10, the piston rod 104 of the roller pressing cylinder 100 is provided.
With the protruding and retracting operations of the taper roller 106,
In the direction perpendicular to the center axis 13 of the molding die 14, the molding die 14 is configured so as to be able to approach and separate from the die 14. When the 122 is removed from the lower mold 16, the metal material 116 can be placed on the lower mold 16, or the special gear that has been formed can be separated from the molding die 14. The release operation of the lower mold 16 from the lower mold 16 can be performed extremely smoothly. In such a position, the upper and lower surfaces of the taper roller 106 that are in contact with the metal material 116 and the upper mold 18, and the metal material Lubricant and the like can be easily applied to the upper surface of the upper mold 116 and the lower surface of the upper mold 18.
The taper roller 106, metal material 116, upper die 18
Can be effectively prevented.

Furthermore, the forming apparatus 10 of the present embodiment
In this case, as the upper die 18 is moved away from the lower die 16 after forming the special gear 122 as a target, the taper roller 106 is moved by the compression coil spring 1.
14, and is automatically returned to the original position before being depressed by the upper die 18. After the special gear 122 is formed, the taper roller 106 is moved to the special gear. The operation of returning to the state before the forming process of step 122 is advantageously omitted, and the advantage that the working efficiency can be effectively improved is also obtained.

Although the specific configuration of the present invention has been described in detail above, this is merely an example, and the present invention is not limited by the above description.

For example, in the above-described embodiment, the first mold is constituted by the lower mold 16 and the third mold is constituted by the upper mold 18. On the contrary, the first mold is constituted by the upper mold. Type 18
Thereby, the third mold may be constituted by the lower mold 16,
Further, even if the first and third dies are configured so as to face each other in the left-right direction, there is no problem.

The structure of the first and third molds is not limited to the one shown in the above embodiment, and the first mold has a structure in which a metal material is supported. The third mold has a structure capable of integrally rotating therewith. As a third mold, the mold faces a support surface for supporting the metal material of the first mold, and is opposed to the first mold. Any structure that can be relatively moved toward and away from each other can be advantageously employed.

Further, in this embodiment, the internal tooth forming die 54 and the external tooth forming die 56 as the second die are fixed to the fixing bolt 7.
At 4, 74, the bolts were fixed to the lower mold 16 as the first mold, but the structure for fixing the second mold to the first mold is not limited to this. Any structure that can be detachably fixed to the first mold can be adopted.

The shapes of the internal tooth forming recess 64 and the external tooth forming recess 72 provided in the internal tooth forming mold 54 and the external tooth forming mold 56, respectively, as the forming portions of the deformed portions are also the same as those described above. It is not particularly limited to what is shown in the form, and may be appropriately changed according to the shape of the deformed portion formed on the surface of the target metal product.

Further, it is of course possible to constitute the second mold using only one of the internal tooth forming mold 54 and the external tooth forming mold 56.

In the above-described embodiment, the moving mechanism for moving the taper roller 106 as a roller member includes the upper mold 18 which is disposed so as to be able to approach and separate from the lower mold 16 as the first mold, and lowers the upper mold 18. A mold closing mechanism that moves toward and away from the mold 16 has been configured, but this moving mechanism moves the roller member in a direction parallel to the center axis of the first mold, and Any structure can be adopted as long as it can be relatively moved toward and away from the mold.

In this moving mechanism, the roller member is pressed in a direction parallel to the central axis of the first mold,
Including a pressing member for moving in a direction parallel to the central axis,
It is desirable that the pressing member be configured to press the roller member at least at a central portion thereof. According to such a configuration, for example, the roller member
Even if only one roller member is provided, the pressing force can be applied to the one roller member in a well-balanced manner, and the reaction force of the pressing force is applied to the pressing member. Acting in a direction that causes the roller to rotate, for example, when the pressing member is pressed against the roller member, an operation failure such as stiffening occurs between the pressing member and the supporting member supporting the pressing member. Can be effectively prevented. Therefore, in the molding apparatus having the above-described configuration, when the roller member is pressed by the pressing member, various operation defects caused by the reaction force to the pressing force of the pressing member against the roller member are caused. Conventionally,
The number of roller members used can be reduced to one, and as a result, it is possible to more effectively reduce the manufacturing cost of the forming apparatus by reducing the number of parts. .

Further, the support structure of the tapered roller 106 as a roller member is not particularly limited to the one exemplified in the above embodiment, and is independent of the first, second and third types. Any structure can be adopted as long as it supports the first mold so as to be rotatable about a rotation axis parallel to the central axis and to be movable in a direction parallel to the central axis.

Further, the outer peripheral surface shape and the number of such roller members are not limited to those shown in the above-described embodiment, and the outer peripheral surface shape is not limited to that of the target metal product. The number of dispositions is appropriately determined according to the axially symmetric outer peripheral surface shape and the like, and the number of the dispositions is determined according to the size of the metal product and the like.

In the above embodiment, the taper roller 106 as a roller member is movable in a direction parallel to the center axis 13 of the molding die 14 and in a direction perpendicular to the center axis 13. The member only needs to be movable at least in a direction parallel to the central axis of the first mold.

Further, the moving distance, moving speed, and the like of the roller member in the above-described direction are appropriately determined depending on the shape and size of the target metal product.

In addition, in this specific example, when a special gear having a large number of internal teeth and external teeth, and a portion where some of the external teeth are missing is formed as a deformed portion, a special gear is formed. Although a specific example of the present invention applied to the forming apparatus to be used has been described, the present invention also has various other gears having different tooth shapes and the like, and has a deformed portion on the surface which is different from the gear. Needless to say, the present invention can also be advantageously applied to a forming apparatus for forming various metal products, such as metal products, in which at least a part of the outer peripheral surface is axisymmetric and has a deformed portion on the surface. .

Although the specific configuration of the present invention has been described in detail above, it goes without saying that the present invention is not subject to any restrictions due to the above description. In addition, in addition to the specific examples described above, various changes, modifications, improvements, and the like based on the knowledge of those skilled in the art can be made to the present invention without departing from the spirit of the present invention. It should be understood.

[0071]

As is clear from the above description, in the apparatus for forming and processing a metal product having a deformed portion on the surface according to the present invention, at least a part of the outer peripheral surface is made axially symmetric and Metal products having irregularly shaped parts in which not only the shapes of the irregularly shaped parts are different from each other, but also the shapes of the axially symmetric parts are mutually different, are extremely advantageous with excellent economic efficiency and workability. It can be formed into a shape.

[Brief description of the drawings]

FIG. 1 is an explanatory longitudinal sectional view showing an example of a molding apparatus according to the present invention.

FIG. 2 is an explanatory longitudinal sectional view showing an example of a molding die provided in the molding apparatus shown in FIG. 1, and shows a state in which the mold is opened.

FIG. 3 is an explanatory top view of a component of the molding apparatus shown in FIG. 1, which is an internal tooth forming die for forming internal teeth on a metal product molded by the molding apparatus.

FIG. 4 is an explanatory sectional view taken along the line IV-IV in FIG. 3;

5 is an explanatory top view of a component member of the forming apparatus shown in FIG. 1, which is an external tooth forming die for forming external teeth on a metal product formed by the forming apparatus. FIG.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is an explanatory view showing an example of a forming process of a metal product using the forming apparatus shown in FIG. 1, showing a state in which a metal material is set in a lower mold of a forming die.

FIG. 8 is an explanatory view showing another example of the forming process of the metal product using the forming apparatus shown in FIG. 1, and shows a taper roller for a metal material set on an upper die of a forming die; Are shown facing each other.

FIG. 9 is an explanatory view showing still another example of a forming process of a metal product using the forming apparatus shown in FIG. 1; This shows a state where the taper roller is in contact.

10 is an explanatory view showing another example of a forming process of a metal product using the forming apparatus shown in FIG. 1, wherein a metal material set on an upper die of a forming die is tapered. The state in which the target metal product is formed by pressing is shown.

FIG. 11 is an explanatory diagram showing still another example of the forming process of the metal product using the forming device shown in FIG. 1;
Fig. 3 shows a state where a molded metal product is released from a molding die.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Forming apparatus 13 Center shaft 14 Mold 16 Lower die 18 Upper die 44 Support surface 54 Internal tooth forming die 56 External tooth forming die 64 Internal tooth forming recess 72 External tooth forming recess 106 Tapered roller 107 Ring surface 108 Upper side Tapered surface 110 Lower tapered surface 116 Metal material 118 External teeth 120 Internal teeth 122 Special gear

Claims (5)

[Claims] 1. An apparatus for forming and processing a metal product having at least a part of an outer peripheral surface axially symmetric and having a deformed portion on a surface, wherein a metal material for providing the metal product is concentrically supported. A first mold configured to be integrally rotatable about a central axis together with the metal material in a state in which the metal material of the first mold is detachably attached to the first mold. A second mold provided with a forming portion corresponding to at least the shape of the deformed portion of the metal product with respect to a surface continuous with the supporting surface to be supported, and a facing surface facing the supporting surface of the first mold. Having a surface, independently supported by the first mold and the second mold, and rotatable about a rotation axis parallel to the central axis of the first mold; and A roller member configured to be movable in a direction parallel to the central axis; The wood is moved in a direction parallel to said central axis,
And a moving mechanism for moving relatively closer to and separated from the first mold, wherein the metal material rotated integrally with the first mold is moved closer to the first mold by the moving mechanism. The pressed metal member is pressed by an opposing surface opposing the support surface of the first mold, and is squeezed between the first mold so that the metal material is pressed by the roller member. The pressed portion is formed into an axially symmetric shape, and is extended along the support surface of the first mold, and the extended portion of the pressed portion has a deformed portion corresponding to the molded portion of the second mold. An apparatus for forming and processing a metal product having a deformed portion on its surface, characterized in that it is configured to form a metal product. 2. A third mechanism, wherein the moving mechanism is opposed to a support surface for supporting the metal material of the first mold, and is disposed so as to be relatively close to and separated from the first mold. The molding apparatus according to claim 1, wherein the molding apparatus includes a mold. 3. The moving mechanism includes a pressing member that presses the roller member in a direction parallel to a central axis of the first mold and moves the roller member in a direction parallel to the central axis. 2. The forming apparatus according to claim 1, wherein the pressing member presses the roller member at least at a central portion thereof. 4. The support surface of the first mold, wherein the roller member is configured to be movable in a direction intersecting a central axis of the first mold, and is moved in one direction in the direction. The molding apparatus according to any one of claims 1 to 3, wherein the molding processing apparatus is configured to be positioned to face. 5. A biasing means for biasing said roller member in a direction parallel to a central axis of said first mold in a direction for separating said roller member relatively to said first mold. The molding apparatus according to any one of claims 1 to 4, which is biased.