JP2008238217A - Forging roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forging roll, wherein an apparatus is made simple and small-sized and an attached device is made small-sized. <P>SOLUTION: The apparatus is provided with: a pair of roll shafts 2; and a pair of molds Ma, Mb arranged at the outer peripheral surfaces of the pair of roll shafts 2, wherein a material S to be formed is molded with the pair of molds Ma, Mb between the pair of roll shafts 2, wherein on the pair of roll shafts 2, the mold pair M having a plurality of processes are arranged, and on the outer peripheral surface of the respective roll shaft 2, the mold pair M having the plurality of processes, are disposed along on the same circular periphery on the outer peripheral surface of the pair of roll shafts 2. Since the molds Ma, Mb having the plurality of processes, are disposed on the same circular, the length in the axial direction of the roll shaft 2 can be shortened, and the apparatus can be made to be compact. Since the forming load is received at the same position in the axial direction of the roll shaft 2, the length in the axial direction of the roll shaft 2 can be shortened and the durability of the roll shaft 2 can be improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a forging roll.

  The forging roll is a device having a pair of upper and lower roll shafts opposed to each other and a pair of upper and lower molds respectively attached to the pair of upper and lower roll shafts, and a predetermined angular range in the circumferential direction of the pair of upper and lower roll shafts Are attached with one mold on the same circumference. The pair of upper and lower molds are attached to the roll shaft so that when the pair of upper and lower roll shafts are rotated, the molding material can be caught between the pair of roll shafts by the pair of upper and lower molds. (For example, Patent Document 1).

  In such a forging roll, a molding material is disposed between a pair of upper and lower roll shafts, and the pair of upper and lower roll shafts is rotated, whereby the molding material is placed between the pair of roll shafts by a pair of upper and lower molds. Mold. The molding operation is performed according to the following procedure.

First, as shown in FIG. 6A, during molding, the molding material S is inserted between the pair of roll shafts 101 and placed at a standby position opposite to the manipulator M. The arrangement at the standby position is performed in a state where there is no pair of upper and lower molds 102 between the pair of roll shafts 101.
Next, when the molding material S is moved together with the manipulator M in accordance with the rotation of the roll shaft 101, the molding material S is caught between the pair of roll shafts 101 by the pair of upper and lower molds 102. Then, since the molding material S is moved in the radial direction of the roll shaft 101 while being sandwiched between the pair of upper and lower molds 102, it is continuously molded along the axial direction (FIGS. 6B to 6B). C)).
Therefore, if the forging roll is used, the material to be molded can be formed into a predetermined cross section or a predetermined shaft diameter along the axial direction thereof.

  Such forging rolls are usually provided with a plurality of mold pairs arranged side by side along the axial direction of the roll shaft 101, and the molding material is sequentially molded by the plurality of mold pairs.

However, in the conventional forging roll, only one length along the circumferential direction of the roll axis can be formed with one mold. Moreover, since the roll shaft is continuously rotated in the same direction while keeping the distance between the axes constant, one roll can be formed only once. For this reason, in a product with a large molding amount or a long product, the number of molds provided on the roll shaft must be increased to increase the number of molding steps. However, as the number of molds increases, there is a problem that the roll shaft must be lengthened in order to widen the area where the molds are attached, and the apparatus is inevitably enlarged.
In addition, if the length that can be molded by one mold is increased, the number of molds can be prevented from increasing, but for this purpose, the length of the mold must be increased. Then, since the length of the roll in the circumferential direction must be increased, the diameter of the roll shaft must be increased, and in this case as well, an increase in the size of the apparatus is inevitable.

JP-A-10-272533

  In view of the above circumstances, an object of the present invention is to provide a forging roll capable of manufacturing a product with a large molding amount or a long product without increasing the size of the apparatus.

A forming method for a forging roll according to a first aspect of the present invention includes a pair of roll shafts and a pair of molds provided on an outer peripheral surface of the pair of roll shafts, and the pair of molds between the pair of roll shafts. A forming method in a forging roll for forming a material to be formed by rotating the pair of roll shafts forward and backward, and reciprocating the material to be formed between the pair of roll shafts in accordance with the forward and reverse rotation. The distance between the pair of roll shafts is changed when the direction of rotation of the pair of roll shafts is changed.
The forming method of the forging roll of the second invention is the portion of the first invention in which the molding load is smaller in the molding region for molding the material to be molded in the pair of molds than in other portions in the molding region. Then, the rotational speed of the pair of roll shafts is increased, and the rotational speed of the pair of roll shafts is decreased in a portion where the molding load is larger than the other portions in the molding region.
A forging roll according to a third aspect of the present invention includes a pair of roll shafts and a pair of molds provided on an outer peripheral surface of the pair of roll shafts, and is molded by the pair of molds between the pair of roll shafts. An apparatus for molding a material, wherein the pair of roll shafts is rotated between the pair of roll shafts, and a driving unit that can rotate the pair of roll shafts forward and backward. And a material moving means for reciprocating with the shaft, and an inter-axis adjusting mechanism capable of adjusting an inter-axis distance between the pair of roll shafts when changing the rotation direction of the pair of roll shafts. .
A forging roll according to a fourth invention is the forging roll according to the third invention, wherein a plurality of mold pairs are provided on the pair of roll shafts, and the plurality of mold pairs are arranged on the outer peripheral surface of each roll shaft. It arrange | positions along the same periphery in the outer peripheral surface of this roll axis | shaft.
A forging roll of a fifth invention is characterized in that, in the third invention, the drive source for rotating the roll shaft is a servo motor.

According to the first invention, the pair of roll shafts is reciprocated between the pair of roll shafts in the molding material, and the rotation direction of the pair of roll shafts is changed according to the moving direction of the molding material. If the distance between the roll shafts is adjusted before changing the rotation direction of the pair of roll shafts, the molding material can be molded by the pair of dies each time the pair of roll shafts rotate forward and backward. The molding for a plurality of steps can be performed. Then, even if the number of moldings increases, an increase in the number of molds can be suppressed, so that an increase in the size of the roll shaft can be prevented. Therefore, even if a product with a large molding amount or a long product is manufactured, the apparatus can be prevented from being enlarged.
According to the second aspect of the present invention, if the rotational speed of the roll shaft is increased when molding with a small molding load, the molding time can be shortened while suppressing the load applied to the driving means, thereby improving work efficiency. Can be made. In addition, if the roll shaft rotation speed is slowed when molding with a large molding load, it is not necessary to use a driving means having excessive performance, so that the driving means can be reduced in size and the apparatus can be reduced in size. Can be
According to the third invention, the molding material is reciprocated between the pair of roll shafts, and the rotation direction of the pair of roll shafts is changed in accordance with the moving direction of the molding material. If the distance between the roll shafts is adjusted before changing the rotation direction of the pair of roll shafts, the molding material can be molded by the pair of dies each time the pair of roll shafts rotate forward and backward. The molding for a plurality of steps can be performed. Then, even if the number of moldings increases, the increase in the number of molds can be suppressed. Therefore, even if a product with a large molding amount or a long product is manufactured, the roll shaft can be prevented from being enlarged, and the apparatus can be enlarged. Can also prevent.
According to the fourth aspect of the invention, since a plurality of molds are provided on the same circumference, if the pair of roll shafts are rotated, the molding material can be sequentially molded by each mold. Moreover, since the plurality of molds are arranged along the same circumference of the roll shaft, the length of the roll shaft in the axial direction can be shortened, and the apparatus can be made compact. Moreover, since the roll shaft receives the forming load at the same position in the axial direction, the rigidity of the roll shaft is increased and the durability can be improved.
According to the fifth aspect, the roll shaft can be stopped at a desired timing, and the rotation direction can be switched freely. Moreover, since the roll shaft can be rotated at a desired speed, the rotation speed of the roll shaft can be changed according to the molding load, and the working efficiency can be improved.

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic side view of a forging roll 1 of the present embodiment. FIG. 2 is a schematic plan view of the forging roll 1 of the present embodiment. 3A is a schematic cross-sectional view taken along line III-III in FIG. 1, and FIG. 3B is a cross-sectional view taken along line BB in FIG.

  1 and 2, reference numeral 1 indicates the forging roll of the present embodiment. The forging roll 1 includes a pair of upper and lower roll shafts 2 and 2. The pair of upper and lower roll shafts 2 and 2 are disposed so that the central axes are parallel to each other, and the base ends thereof are rotatably attached to the frame 5 of the forging roll 1.

  As shown in FIG. 3, gears 2 a are provided at the base ends of the pair of upper and lower roll shafts 2, 2, and each gear 2 a is attached to the main shaft of the pair of upper and lower servomotors 3, 3. It meshes with each gear. That is, the pair of upper and lower roll shafts 2 and 2 can be independently driven by the pair of upper and lower servomotors 3 and 3.

Note that the pair of upper and lower roll shafts 2 and 2 may be driven by being directly connected to the main shafts of the pair of upper and lower servomotors 3 and 3.
Furthermore, the pair of upper and lower servo motors 3 are normally controlled to be stopped simultaneously, and the pair of upper and lower roll shafts 2 and 2 are controlled to rotate in the opposite directions at the same rotational speed. However, the pair of upper and lower servo motors 3 do not necessarily have to be deactivated at the same time or operated at the same rotational speed, and can be deactivated at different timings or operated at different rotational speeds.

  As shown in FIG. 1, the upper mold Ma and the lower mold Mb of the mold pair M are attached to the outer peripheral surfaces of the pair of upper and lower roll shafts 2 and 2. The upper and lower molds Ma and Mb are formed on the pair of upper and lower roll axes 2 and 2 so that when the pair of roll axes 2 rotate, the material to be molded is bitten between the upper and lower molds Ma and Mb. Attached

As shown in FIG. 3, the pair of upper and lower roll shafts 2 and 2 are rotatably held by the frame 5 through two bearing portions 5a. Of the pair of upper and lower roll shafts 2 and 2, an eccentric member 21 of the inter-axis adjustment mechanism 20 is provided between the lower roll shaft 2 and each bearing portion 5 a. Each eccentric member 21 is a member that has a substantially cylindrical shape and has a shaft-shaped portion that is attached to the bearing portion 5a, and has a through-hole 21h that passes through its axial direction (left-right direction in FIG. 3A). ing. The through hole 21h is formed such that its center O ₂ is eccentric from the center O ₁ of the eccentric member 21 (FIG. 3B).

A gear portion 21 b is provided on the outer peripheral surface of one end portion in the axial direction of each eccentric member 21. A pinion 22a is engaged with the gear portion 21b of each eccentric member 21, and each pinion 22a is attached to a rotary shaft 22b. It is attached.
For this reason, if the eccentric member rotating means 22 is operated, a rotational force is transmitted to the gear portion 21b of each eccentric member 21 through each pinion 22a, and each eccentric member 21 rotates by the same amount. Then, since the roll shaft 2 attached to the through hole 21h of the eccentric member 21 moves up and down in parallel with the upper roll shaft 2 as the eccentric member 21 rotates, the pair of upper and lower roll shafts 2, 2 The distance between can be changed.

  The mechanism for adjusting the distance between the pair of upper and lower roll shafts 2 and 2 is not limited to the mechanism described above. For example, the roll shaft 2 may be moved up and down together with the bearing portion 5a by a cylinder mechanism, a wedge mechanism, or the like, as long as the pair of upper and lower roll shafts 2 and 2 can be moved up and down while being kept parallel to each other. Not.

  Moreover, as shown in FIG. 1, the forging roll 1 of this embodiment is provided with the material moving means 10 which supplies a molding material. The material moving means 10 includes a moving member 11 having a gripping portion 11a for gripping a material to be molded at the tip, and the moving member 11 is linear toward the space between the pair of upper and lower roll shafts 2 and 2. It is provided to advance and retreat.

A forming operation by the forging roll 1 of the present embodiment having the above-described configuration will be described.
FIG. 4 is an explanatory diagram of a forming operation by the forging roll 1 of the present embodiment. As shown in FIG. 2A, when molding is started, the molding material S is supported by the material moving means 10 and is positioned opposite to the material moving means 10 with the pair of roll shafts 2 interposed therebetween ( (Hereinafter referred to as a standby position). When the pair of upper and lower servo motors 3 are operated from this state, the pair of roll shafts 2 rotate at a desired rotational speed in the direction indicated by the arrows in the figure.
At this time, the material moving means 10 causes the molding material S to move toward the material moving means 10 (to the right in FIG. 4) by the upper and lower molds Ma1, Mb1 provided on the pair of roll shafts 2. Move at a speed corresponding to the molding speed. Then, the molding material S is sandwiched between the upper and lower molds Ma and Mb and molded into a desired cross-sectional shape (FIG. 4B).

  Soon, the molding is completed, and the molding material S is separated from the pair of upper and lower roll shafts 2 and 2. Then, when the molding material S moves to a position on the material moving means 10 side (hereinafter referred to as a molding end position) with respect to the pair of upper and lower roll shafts 2, 2, the movement of the molding material S by the material moving means 10 stops. Is done. At the same time, the pair of upper and lower servo motors 3 are also stopped, and the rotation of the pair of upper and lower roll shafts 2 and 2 is also stopped (FIG. 4C).

  When the rotation of the pair of upper and lower roll shafts 2 and 2 is stopped, the inter-axis adjusting mechanism 20 is operated, the eccentric member 21 is rotated, and the lower roll shaft 2 is moved upward (indicated by the arrow in FIG. 4C). Direction), the distance D between the pair of upper and lower roll shafts 2 and 2 is adjusted to be shorter.

When the inter-axis distance adjustment between the pair of upper and lower roll shafts 2 and 2 is completed, the pair of upper and lower servo motors 3 are operated. At this time, as shown in FIG. 4D, in the pair of upper and lower servo motors 3, the pair of roll shafts 2 rotate in the direction indicated by the arrows in the drawing, that is, in the direction opposite to the previous molding.
The material moving means 10 is also provided in the up and down directions provided in the pair of roll shafts 2 and 2 in the reverse direction from the previous molding, that is, from the molding end position toward the standby position (to the left in FIG. 4). The molds Ma1, Mb1 are moved at a speed corresponding to the molding speed. Then, the molding material S is again sandwiched between the upper and lower molds Ma and Mb (FIG. 4E).
At this time, since the distance D between the pair of upper and lower roll shafts 2 and 2 is shortened by the inter-axis adjusting mechanism 20, the molding material S is molded such that its cross section is further reduced.

  When the molding is finished again and the molding material S is separated from the pair of upper and lower roll shafts 2 and 2 and moves to the standby position, the movement of the molding material S by the material moving means 10 is stopped, and the pair of upper and lower servos. The motor 3 is also stopped, and the rotation of the pair of upper and lower roll shafts 2 and 2 is also stopped (FIG. 4F).

  When the rotation of the pair of upper and lower roll shafts 2 and 2 is also stopped, the inter-axis adjusting mechanism 20 is actuated again, the eccentric member 21 is rotated, the lower roll shaft 2 is further moved upward, and the pair of upper and lower roll shafts 2 is moved. , 2 is adjusted to be further shortened.

  When the adjustment of the distance between the pair of upper and lower roll shafts 2 and 2 is completed, the pair of upper and lower servo motors 3 are operated again. At this time, the pair of upper and lower servomotors 3 rotate the pair of roll shafts 2 in the opposite direction to the previous molding, and the molding material S is at a speed corresponding to the molding speed of the upper and lower molds Ma1, Mb1, The material moving means 10 moves from the standby position toward the molding end position, and the molding material S is further molded (FIGS. 4A and 4B).

  By repeating the above steps, the molding material S can be molded a plurality of times with the same mold pair M, and the molding material S can be molded to a desired shape.

As described above, in the forging roll 1 of the present embodiment, the pair of roll shafts 2, 2 is reciprocated between the pair of roll shafts 2, 2 in the molding material S and in accordance with the moving direction of the molding material S. The direction of rotation is changed. In addition, since the roll axis distance D is adjusted before the rotation direction of the pair of roll shafts 2 and 2 is changed, the molding for a plurality of steps can be performed with one mold pair M.
Then, even if the molding man-hours of the molding material S increase, an increase in the pair of molds M attached to the pair of roll shafts 2 and 2 can be suppressed, so that a product with a large molding amount or a long product is manufactured. However, an increase in the size of the pair of roll shafts 2 and 2 can be prevented, and an increase in the size of the apparatus can be prevented.

  Further, since the roll shaft 2 is driven by the servo motor 3, the rotation speed of the roll shaft 2 can be easily changed. Then, the rotational speed of the roll axis | shaft 2 can be changed for every shaping | molding process, and the rotational speed of the roll axis | shaft 2 can also be changed in the middle of the metal mold | die pair M shaping | molding. It is also possible to change the molding speed in accordance with the molding load.

  Normally, when the molding material S is molded by one mold pair M, the molding load is rarely the same in the entire molding region, and the molding load is larger than the molding load averaged over the entire molding region. There is a portion with a small (light load region) and a portion with a large molding load (heavy load region).

Then, in the molding region, the load applied to the servo motor 3 is small in the light load region. Therefore, even if the rotational speed of the roll shaft 2 is increased and the molding speed is increased in the light load region where the molding load is small, the servo motor The increase in molding load applied to 3 can be suppressed.
Therefore, when the molding material S is molded by the mold pair M, if the rotational speed of the roll shaft 2 in the light load region is increased in the molding region, the load applied to the servo motor 3 is suppressed and the molding time is shortened. Therefore, working efficiency can be improved.

On the contrary, in the forming region, the load applied to the servo motor 3 becomes large in the heavy load region. Therefore, if the rotational speed of the roll shaft 2 is slowed down in the heavy load region where the forming load is large, the servo motor 3 is slowed down. It is possible to suppress an increase in the molding load applied to.
Therefore, when the molding material S is molded by the mold pair M, if the rotational speed of the roll shaft 2 in the heavy load region is reduced in the molding region, the load applied to the servomotor 3 can be suppressed. Then, it is not necessary to use the servomotor 3 having a performance that is excessively higher than necessary as compared with the capacity required for molding in a region other than the heavy load region, for example, in the light load region. And the device can be miniaturized.

  In other words, if the molding speed is changed according to the molding load, the working efficiency can be improved by reducing the molding time while suppressing the load applied to the servo motor 3, and the performance is excessive. It is not necessary to use the servo motor 3, and the servo motor 3 can be miniaturized and the apparatus can be miniaturized.

  The light load region is not limited to a portion where the molding load is smaller than the molding load obtained by averaging the entire molding region, and is a concept including a region where the molding load is smaller than a predetermined value. Similarly, the heavy load region is a concept including not only a portion where the molding load is larger than the molding load obtained by averaging the entire molding region but also a region where the molding load is larger than a predetermined value.

Further, when the mold pair M molds the molding material S, it is possible to change the roll axis distance D by the inter-axis adjusting mechanism 20 while molding the molding material S.
Specifically, the molding material S is formed while the pair of roll shafts 2 and 2 are rotated, but the eccentric member 21 of the inter-axis adjusting mechanism 20 is rotated in accordance with the rotation of the pair of roll shafts 2 and 2. Let That is, in synchronization with the rotation of the servo motor 3 that is the drive source of the pair of roll shafts 2, 2, the eccentric member rotating means 22 of the inter-axis adjusting mechanism 20 is operated so that the roll axis distance D is shortened. Then, since the distance D between roll axes becomes short according to rotation of a pair of roll shafts 2 and 2, the to-be-molded material S can be shape | molded so that the shaft diameter may become thin gradually.
Such a molding method is suitable for molding with a large cross-sectional change, and if applied to such molding, there is an advantage that the molding process can be reduced even when molding with a large cross-sectional change is performed.

  The drive source is not limited to the servo motor 3, but a drive source that can freely control the rotation direction, rotation speed, and rotation stop timing is preferable.

  Furthermore, in the above example, the case where a pair of mold pairs M is provided on the pair of upper and lower roll shafts 2 and 2 is illustrated, but the number of mold pairs M attached to the pair of upper and lower roll shafts 2 and 2 is illustrated. May be two or more sets. When a plurality of mold pairs M are provided, the upper and lower molds Ma and Mb in each mold pair M may be arranged side by side along the axial direction of the roll shaft 2 or each roll shaft. 2 may be arranged along the same circumference.

  As shown in FIG. 5, when the upper and lower molds Ma, Mb in each mold pair M are arranged along the same circumference in each roll shaft 2, the mold pair M1, M2 is a pair of rolls. When the shafts 2 and 2 are rotated, they are attached to the pair of upper and lower roll shafts 2 and 2 so that the material to be molded is caught between the upper and lower molds Ma and Mb which are paired.

In the case of such a configuration, the mold pair M1, M2 can be molded by the following method.
First, in FIG. 5, the molding material is molded only by the mold pair M <b> 1 positioned to the right of the center of the roll shaft 1. At this time, while reciprocating the molding material, the pair of roll shafts 2 and 2 are rotated forward and backward by a predetermined angle (for example, about 180 degrees) so that only the mold pair M1 sandwiches the molding material.
Next, when the molding by the mold pair M1 is completed, the mold pair M2 is arranged on the right side of the center of the roll shaft 1. That is, the roll shaft 2 is rotated 180 degrees from the state shown in FIG.
If the pair of roll shafts 2 and 2 are rotated forward and reverse by a predetermined angle so that only the mold pair M2 sandwiches the molding material, the molding material can be molded only by the mold pair M2.

  As described above, when the process of forming the material to be molded into different cross-sectional shapes is continuously performed, the upper and lower molds Ma and Mb in each mold pair M are identical in each roll shaft 2 as shown in FIG. If it arrange | positions along the circumference | surroundings of this, even if it does not replace | exchange the mold pair M, a shaping | molding operation | work can be continuously performed by several mold pair M. Then, since the time required for exchanging the mold pair M is unnecessary or shortened, the working time of the entire molding operation can be shortened.

When the upper and lower molds Ma and Mb in each mold pair M are arranged along the same circumference on each roll shaft 2, a plurality of molds are attached to both roll shafts 2. However, both roll shafts 2 should just have the length about the width | variety of a metal mold | die. Then, since the length in the axial direction of both roll shafts 2 can be shortened, if both the roll shafts 2 are shortened, the width of the device (the length in the left-right direction in FIG. 3) can be shortened, and the device can be made compact. .
In addition, each roll shaft 2 receives a molding load at the same position in the axial direction regardless of which mold pair M is molded. Then, in the axial direction of each roll shaft 2, the position where the molding load is applied, that is, the position where the upper and lower molds Ma and Mb are attached can be brought closer to the position where each roll shaft 2 is supported by the frame 5. . And since a bending etc. generate | occur | produce in each roll axis | shaft 2 when a forming load is added with respect to each roll axis | shaft 2, durability of each roll axis | shaft 2 can be improved, and each roll The shaft 2 can be cantilevered.

Further, as shown in FIGS. 2 and 3, if each roll shaft 2 is cantilevered, a structure for supporting the tip of each roll shaft 2 is not required, and thus the apparatus can be configured more compactly. it can.
If the structure as described above is eliminated, the accessibility to the upper and lower molds Ma, Mb attached to each roll shaft 2 is also improved. Therefore, even if a plurality of mold pairs M are attached, the upper and lower molds are attached. The replacement work of Ma and Mb can be facilitated.
In particular, as shown in FIG. 3, if the base end portion of the roll shaft 2 is supported by the two bearing portions 5a in the frame 5, the tip side is more than the distance L1 between the two bearing portions 5a. The distance L2 from the bearing portion 5a to the center of the mold M in the axial direction of the roll shaft 2 can be shortened. Then, even when the cantilever support structure is adopted, the rigidity of the roll shaft 2 can be easily secured, and the durability and stability of the roll shaft 2 can be further increased.

Further, when the upper and lower molds Ma, Mb in each mold pair M are arranged along the same circumference in each roll shaft 2, the material moving means 10 is provided even if there are a plurality of mold pairs M. It only needs to have the function of moving the molding material S linearly between the pair of upper and lower roll shafts 2 and 2. Then, unlike the conventional forging roll, it is not necessary to move the molding material S in the axial direction of the roll shaft 2 when the molding material S is moved from the molding end position to the standby position.
Therefore, the configuration of the material moving means 10 can be simplified, and the moving time of the molding material S can be shortened, so that the working time can be shortened and the cycle time can be shortened.
Since the material moving means 10 only needs to move the molding material linearly, it is not necessary to provide a dedicated device for the forging roll as in the prior art, and a general industrial robot is adopted as the material moving means 10. can do. Then, the structure of the material moving means 10 can be made into a simple and compact structure, and the structure of the whole forging roll 1 can also be made into a simple and compact structure.

  And if it is a case where a some metal mold | die is provided on the same periphery of the roll axis | shaft 2 like said Example, since each roll axis | shaft 2 will increase a circumference, if each diameter is enlarged, each roll will become long. Only by increasing the diameter of the shaft 2, the number of mold pairs M that can be attached to each roll shaft 2 can be increased.

It is a schematic side view of the forging roll 1 of this embodiment. It is a schematic plan view of the forging roll 1 of this embodiment. (A) is the III-III line schematic sectional drawing of FIG. 1, (B) is the BB sectional view taken on the arrow of (A). It is explanatory drawing of the shaping | molding operation | work by the forging roll 1 of this embodiment. It is a schematic side view of the forging roll 1 of other embodiment. It is explanatory drawing of the shaping | molding operation | work by the conventional forging roll.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Forging roll 2 Roll axis | shaft 3 Servo motor 10 Material moving means M Mold pair Ma Upper mold Mb Lower mold S Mold material

Claims (5)

Forming in a forging roll comprising a pair of roll shafts and a pair of molds provided on the outer peripheral surfaces of the pair of roll shafts, and molding a material to be molded by the pair of molds between the pair of roll shafts A method,
The pair of roll shafts are rotated forward and backward, and the molding material is molded while reciprocating between the pair of roll shafts according to the forward and reverse rotation.
A forming method for a forging roll, wherein the distance between the pair of roll shafts is changed when the rotation direction of the pair of roll shafts is changed. In a molding region for molding the molding material in the pair of molds,
In the part where the molding load is small compared to other parts in the molding region, the rotational speed of the pair of roll shafts is increased,
2. The forming method for a forging roll according to claim 1, wherein a rotation speed of the pair of roll shafts is decreased in a portion where the forming load is larger than that in other portions in the forming region. A device comprising a pair of roll shafts and a pair of molds provided on the outer peripheral surfaces of the pair of roll shafts, and molding a molding material by the pair of molds between the pair of roll shafts,
Driving means capable of rotating the pair of roll shafts forward and backward; and
A material moving means for reciprocally moving the molding material between the pair of roll shafts in accordance with forward and reverse rotation of the pair of roll shafts,
A forging roll comprising: an inter-axis adjustment mechanism capable of adjusting an inter-axis distance between the pair of roll shafts when changing the rotation direction of the pair of roll shafts. A plurality of mold pairs are provided on the pair of roll shafts,
The forging according to claim 3, wherein the plurality of mold pairs are arranged on the outer circumferential surface of each roll shaft along the same circumference on the outer circumferential surface of the pair of roll shafts. roll. The forging roll according to claim 3, wherein the drive source for rotating the roll shaft is a servo motor.

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